This document discusses the IEEE 802.3ba standard for Ethernet speeds of 40 Gbps and 100 Gbps. It describes the objectives of the standard to support speeds faster than 10 Gbps. The standard defines physical layer specifications for 40 Gbps and 100 Gbps transfer rates, including defining new Ethernet physical layer devices, sublayers, and interfaces to support these higher speeds.
The document provides an overview of 10 Gigabit Ethernet technologies and their applications. It describes how 10 Gigabit Ethernet bridges the gap between local area networks and wide area networks by providing 10 Gbps bandwidth while maintaining compatibility with existing Ethernet networks. It also explains the key components and standards that make up the 10 Gigabit Ethernet architecture, including the physical layer devices, reconciliation sublayer, physical coding sublayer, and WAN interface sublayer.
Simulation of IEEE 802.16e Physical LayerIOSR Journals
Abstract : Growth in technology has led to unprecedented demand for high speed Internet access. IEEE
802.16e (Mobile WiMAX) is a wireless communication standard with high data transfer rates and good
performance. It not only is efficient as compared to its counterpart technologies today (Wi-Fi and 3G), but also
lays the foundation for 4G mobile communication. In 4G wireless communication systems, bandwidth is a
precious resource, and service providers are continuously met with the challenge of accommodating more users
within a limited allocated bandwidth. To increase data rate of wireless medium with higher performance,
Mobile WiMAX uses Orthogonal Frequency Division Multiple Access (OFDMA). This paper describes the
simulation of the physical layer of IEEE 802.16e using Simulink in Matlab 7.0 (R2010a). The system
performance is evaluated considering the Signal to noise ratio (SNR) and Bit error rate (BER) parameters.
Keywords: 802.16e, OFDMA, Mobile WiMAX.
Ethernet compliance test is a hard task, but we make it much easier for you. Learn more from the basics to automotive Ethernet and how we do our tests, thereby simplifying things for you when designing a custom carrier board. http://bit.ly/2SBGTNO
الأجيال المختلفه في شبكات المحمول باللغه العربيه للدكتور عبد الكريم حسين الم...ibrahimnabil17
The document provides a detailed explanation of the four generations of mobile communications including their basic concepts, components, and transmission methods. It discusses the architecture and features of 1G networks like Advanced Mobile Phone System (AMPS) and Nordic Mobile Telephony (NMT), as well as 2G networks exemplified by the Global System for Mobile Communications (GSM). The document also touches on goals and major networks of 2G and provides an introduction to 3G.
Controller Area Network is an ideal serial bus design suitable for modern embedded system based networks. It finds its use in most of critical applications, where error detection and subsequent treatment on error is a critical issue. CRC (Cyclic Redundancy Check) block was developed on FPGA in order to meet the needs for simple, low power and low cost wireless communication. This paper gives a short overview of CRC block in the Digital transmitter based on the CAN 2.0 protocols. CRC is the most preferred method of encoding because it provides very efficient protection against commonly occurring burst errors, and is easily implemented. This technique is also sometimes applied to data storage devices, such as a disk drive. In this paper a technique to model the error detection circuitry of CAN 2.0 protocols on reconfigurable platform have been discussed? The software simulation results are presented in the form of timing diagram.FPGA implementation results shows that the circuitry requires very small amount of digital hardware. The Purpose of the research is to diversify the design methods by using VHDL code entry through Modelsim 5.5e simulator and Xilinx ISE8.3i.The VHDL code is used to characterize the CRC block behavior which is then simulated, synthesized and successfully implemented on Sparten3 FPGA .Here, Simulation and Synthesized results are also presented to verify the functionality of the CRC -16 Block. The data rate of CRC block is 250 kbps .Estimated power consumption and maximum operating frequency of the circuitry is also provided.
One of the most attractive field for research for researchers and authors so the Wireless adhoc networks.
So, this paper will describe the background and basic features of Open Short Path First (OSPF) routing
protocol due to multi-access networks. Explaining and practice on the OSPF configuration commands.
Describe, modify and calculate the metric (Cost) used by OSPF due to adhoc networks. Illustrating the
Election parameters made by DR/BDR (Designated and Back Designated) Routers used in multi-access
wireless networks. This paper will use OSPF routing protocol because of its average administrative
distance with all routing protocols.
Network resources allocated for particular application traffic are aware of the characteristics of L4+ content to be transmitted. One embodiment of the invention realizes network resource allocation in terms of three intelligent modules, gateway, provisioning and classification. A gateway module exerts network control functions in response to application requests for network resources. The network control functions include traffic path setup, bandwidth allocation and so on. Characteristics of the content are also specified in the received application network resource requests. Under request of the gateway module, a provisioning module allocates network resources such as bandwidth in optical networks and edge devices as well. An optical network resource allocation leads to a provisioning optical route. Under request of the gateway module, a classification module differentiates applications traffic according to content specifications, and thus creates and applies content-aware rule data for edge devices to forward content-specified traffic towards respective provisioning optical routes.
https://www.google.com/patents/US7944827?dq=US+7944827&hl=en&sa=X&ei=-XJSVPLjF8Kn8AXtz4G4Cw&ved=0CB8Q6AEwAA
Analysis of WiMAX Physical Layer Using Spatial Multiplexing Under Different F...CSCJournals
WiMAX is defined as Worldwide Interoperability for Microwave Access by the WiMAX Forum and its industry. WiMAX is basically a wireless digital communication system which is also known as IEEE 802.16 standard intended for wireless \"metropolitan area networks\". WiMAX is based upon OFDM multiplexing technique. It was developed in order to provide high speed data rates to the users located in those areas also where broadband wireless coverage is not available. MIMO systems also play an important role in the field of wireless communication by allowing data to be transmitted and received over different antennas. WiMAX-MIMO systems are developed to improve the performance of WiMAX system. This paper analyzes WiMAX-MIMO system for different modulation schemes with different CC code rates under different fading channels (Rician and Nakagami channel). Spatial Multiplexing technique of MIMO system is used for the simulation purpose. Analysis has been done in the form of Signal-to Noise Ratio (SNR) vs Bit Error Rate (BER) plots.
The document provides an overview of 10 Gigabit Ethernet technologies and their applications. It describes how 10 Gigabit Ethernet bridges the gap between local area networks and wide area networks by providing 10 Gbps bandwidth while maintaining compatibility with existing Ethernet networks. It also explains the key components and standards that make up the 10 Gigabit Ethernet architecture, including the physical layer devices, reconciliation sublayer, physical coding sublayer, and WAN interface sublayer.
Simulation of IEEE 802.16e Physical LayerIOSR Journals
Abstract : Growth in technology has led to unprecedented demand for high speed Internet access. IEEE
802.16e (Mobile WiMAX) is a wireless communication standard with high data transfer rates and good
performance. It not only is efficient as compared to its counterpart technologies today (Wi-Fi and 3G), but also
lays the foundation for 4G mobile communication. In 4G wireless communication systems, bandwidth is a
precious resource, and service providers are continuously met with the challenge of accommodating more users
within a limited allocated bandwidth. To increase data rate of wireless medium with higher performance,
Mobile WiMAX uses Orthogonal Frequency Division Multiple Access (OFDMA). This paper describes the
simulation of the physical layer of IEEE 802.16e using Simulink in Matlab 7.0 (R2010a). The system
performance is evaluated considering the Signal to noise ratio (SNR) and Bit error rate (BER) parameters.
Keywords: 802.16e, OFDMA, Mobile WiMAX.
Ethernet compliance test is a hard task, but we make it much easier for you. Learn more from the basics to automotive Ethernet and how we do our tests, thereby simplifying things for you when designing a custom carrier board. http://bit.ly/2SBGTNO
الأجيال المختلفه في شبكات المحمول باللغه العربيه للدكتور عبد الكريم حسين الم...ibrahimnabil17
The document provides a detailed explanation of the four generations of mobile communications including their basic concepts, components, and transmission methods. It discusses the architecture and features of 1G networks like Advanced Mobile Phone System (AMPS) and Nordic Mobile Telephony (NMT), as well as 2G networks exemplified by the Global System for Mobile Communications (GSM). The document also touches on goals and major networks of 2G and provides an introduction to 3G.
Controller Area Network is an ideal serial bus design suitable for modern embedded system based networks. It finds its use in most of critical applications, where error detection and subsequent treatment on error is a critical issue. CRC (Cyclic Redundancy Check) block was developed on FPGA in order to meet the needs for simple, low power and low cost wireless communication. This paper gives a short overview of CRC block in the Digital transmitter based on the CAN 2.0 protocols. CRC is the most preferred method of encoding because it provides very efficient protection against commonly occurring burst errors, and is easily implemented. This technique is also sometimes applied to data storage devices, such as a disk drive. In this paper a technique to model the error detection circuitry of CAN 2.0 protocols on reconfigurable platform have been discussed? The software simulation results are presented in the form of timing diagram.FPGA implementation results shows that the circuitry requires very small amount of digital hardware. The Purpose of the research is to diversify the design methods by using VHDL code entry through Modelsim 5.5e simulator and Xilinx ISE8.3i.The VHDL code is used to characterize the CRC block behavior which is then simulated, synthesized and successfully implemented on Sparten3 FPGA .Here, Simulation and Synthesized results are also presented to verify the functionality of the CRC -16 Block. The data rate of CRC block is 250 kbps .Estimated power consumption and maximum operating frequency of the circuitry is also provided.
One of the most attractive field for research for researchers and authors so the Wireless adhoc networks.
So, this paper will describe the background and basic features of Open Short Path First (OSPF) routing
protocol due to multi-access networks. Explaining and practice on the OSPF configuration commands.
Describe, modify and calculate the metric (Cost) used by OSPF due to adhoc networks. Illustrating the
Election parameters made by DR/BDR (Designated and Back Designated) Routers used in multi-access
wireless networks. This paper will use OSPF routing protocol because of its average administrative
distance with all routing protocols.
Network resources allocated for particular application traffic are aware of the characteristics of L4+ content to be transmitted. One embodiment of the invention realizes network resource allocation in terms of three intelligent modules, gateway, provisioning and classification. A gateway module exerts network control functions in response to application requests for network resources. The network control functions include traffic path setup, bandwidth allocation and so on. Characteristics of the content are also specified in the received application network resource requests. Under request of the gateway module, a provisioning module allocates network resources such as bandwidth in optical networks and edge devices as well. An optical network resource allocation leads to a provisioning optical route. Under request of the gateway module, a classification module differentiates applications traffic according to content specifications, and thus creates and applies content-aware rule data for edge devices to forward content-specified traffic towards respective provisioning optical routes.
https://www.google.com/patents/US7944827?dq=US+7944827&hl=en&sa=X&ei=-XJSVPLjF8Kn8AXtz4G4Cw&ved=0CB8Q6AEwAA
Analysis of WiMAX Physical Layer Using Spatial Multiplexing Under Different F...CSCJournals
WiMAX is defined as Worldwide Interoperability for Microwave Access by the WiMAX Forum and its industry. WiMAX is basically a wireless digital communication system which is also known as IEEE 802.16 standard intended for wireless \"metropolitan area networks\". WiMAX is based upon OFDM multiplexing technique. It was developed in order to provide high speed data rates to the users located in those areas also where broadband wireless coverage is not available. MIMO systems also play an important role in the field of wireless communication by allowing data to be transmitted and received over different antennas. WiMAX-MIMO systems are developed to improve the performance of WiMAX system. This paper analyzes WiMAX-MIMO system for different modulation schemes with different CC code rates under different fading channels (Rician and Nakagami channel). Spatial Multiplexing technique of MIMO system is used for the simulation purpose. Analysis has been done in the form of Signal-to Noise Ratio (SNR) vs Bit Error Rate (BER) plots.
This document discusses Ethernet ring protection for carrier Ethernet networks. It outlines the Ethernet ring protection switching mechanism defined in ITU-T G.8032, which provides automatic protection switching for Ethernet topologies forming a closed loop. The mechanism utilizes existing Ethernet MAC and bridge functions to achieve fast protection switching in under 50 milliseconds. It also introduces some issues for further standardization to enhance Ethernet ring protection.
The document discusses the new 400 Gigabit Ethernet standard, which allows for extremely high bandwidth connectivity. A key development is that 1 RU switches can now provide up to 12.8 Terabits per second of bandwidth using 400GbE ports. 400GbE uses 50Gbps serializers/deserializers across 8 lanes to achieve its high speeds. Typical deployments of 400GbE switches include use in super spines for data center networks or in telecom networks for aggregation.
This document discusses various networking technologies including media types, network topologies, and LAN standards. It describes common media like twisted-pair cable, coaxial cable, and fiber optic cable. It also discusses network topologies like star, ring, and bus. Finally, it summarizes several LAN standards including Ethernet, Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet and how they have evolved to support higher bandwidths. It also briefly mentions other technologies like Token Ring, LocalTalk, and FDDI.
This document describes the design and implementation of an IP core for the CAN protocol. It begins with an introduction to CAN and its use in automotive and industrial applications. It then discusses the protocol layers, frame formats, arbitration, and error handling mechanisms of CAN. The document proceeds to describe the design of Verilog modules for a CAN transceiver including transmitter and receiver modules. It presents simulation waveforms showing the transmission and reception of CAN frames between two FPGA boards. It concludes that the IP core was successfully implemented on Spartan 3 and Spartan 6 FPGAs to demonstrate node-to-node communication over a CAN bus.
Performance Improvement of IEEE 802.22 WRAN Physical LayerIOSR Journals
The spectrum available for the wireless services is limited, the increased demand of wireless
application has put a lot of limitations on the utilization of available radio spectrum. For the efficient spectrum
utilization for wireless application IEEE 802.22 standard i.e. WRAN (Wireless Regional Area Network) is
developed which is based on cognitive radio technique that senses the free available spectrum. It allows sharing
of geographically unused channels allocated to the TV Broadcast Service, without interference.
In this paper we are evaluating the performance of WRAN over physical layer with QPSK, 16-QAM
and 64-QAM modulation with Convolution coding with code rate of 1/2, 2/3, 3/4, 5/6 and obtaining the BER
curves for rician channel. Simulation is performed in MATLAB
IRJET-Analysis of Medium Access Protocols with Channel Bonding for Cognitive ...IRJET Journal
This document analyzes the performance of medium access control (MAC) protocols with channel bonding for cognitive radio networks operating on television (TV) bands. It studies the slotted ALOHA and non-persistent CSMA MAC protocols using two orthogonal frequency-division multiplexing (OFDM) schemes: fixed-carrier number (FCN) and fixed-carrier spacing (FCS). The document presents an analytical model for throughput estimation and simulations of the MAC protocols with FCN and FCS OFDM on different TV channel widths. The results show that the non-persistent CSMA protocol achieves better performance than slotted ALOHA, and that channel capture effects are significant.
Transceiver Options for Brocade 5100 SwitchMonica Geller
Nowadays, many small and medium business and organizations such as local government, campus and some agencies etc., require fast and frequent access to database the files. A storage Area Network (SAN) with Fibre Channel (FC) switching technology (Figure 1) offers the speed and reliability for them. Brocade 5100 switch is an ideal Fibre Channel switch used for those organizations and can meet a variety of SAN environments.
Network resources allocated for particular application traffic are aware of the characteristics of L4+ content to be transmitted. One embodiment of the invention realizes network resource allocation in terms of three intelligent modules, gateway, provisioning and classification. A gateway module exerts network control functions in response to application requests for network resources. The network control functions include traffic path setup, bandwidth allocation and so on. Characteristics of the content are also specified in the received application network resource requests. Under request of the gateway module, a provisioning module allocates network resources such as bandwidth in optical networks and edge devices as well. An optical network resource allocation leads to a provisioning optical route. Under request of the gateway module, a classification module differentiates applications traffic according to content specifications, and thus creates and applies content-aware rule data for edge devices to forward content-specified traffic towards respective provisioning optical routes.
https://www.google.com/patents/US7580349?dq=US+7580349&hl=en&sa=X&ei=DXVSVID-EoTc8AW-_IDwBw&ved=0CB8Q6AEwAA
This document summarizes the physical layer frame structure used in 4G LTE and LTE-Advanced downlink transmissions. It describes how the LTE system toolbox in MATLAB can be used to generate physical signals and channels, and map them to resource elements in the time-frequency grid. Key aspects covered include the use of OFDM, resource block structure, and how synchronization signals, broadcast channels, control channels, and shared data channels are allocated in the frame. The document provides technical details on frame configurations and illustrates example resource grids for a subframe and radio frame.
This document discusses how the theoretical peak throughput of 300 Mbps for LTE systems is calculated. It begins by introducing some of the key concepts in LTE including Long Term Evolution (LTE), the LTE architecture, and duplexing methods like Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD). It then explains how parameters of the LTE physical layer such as bandwidth, modulation, coding rate, and multiple-input multiple-output (MIMO) techniques impact the calculation of throughput. The document demonstrates throughput calculations for both FDD and TDD systems using these parameters and assumptions from the 3GPP specifications. It concludes by showing example calculations of downlink and uplink throughput for 20
ARINC 629 was an early avionics network standard from the 1970s, but it could not meet the challenges of modern integrated modular avionics. AFDX (Avionics Full DupleX Switched Ethernet) was developed as a faster replacement based on Ethernet. AFDX uses virtual links with guaranteed bandwidth and latency to ensure safety-critical data transport. It provides redundancy through a switched topology and static addressing to avoid the variable latency of standard Ethernet networks. AFDX has been adopted as it combines the reliability of older avionics standards with high-speed connectivity required for modern aircraft systems.
This document discusses the implementation of an interleaver on an FPGA for wireless communication systems. It proposes a novel finite state machine (FSM) based approach to model a multimode address generator for a WiMAX interleaver using VHDL on an FPGA. The proposed interleaver works better at high frequencies compared to existing FPGA approaches and uses minimal logic cells. It also studies interleaving techniques in OFDM-based wireless local area networks and discusses designing the interleaver using the internal memory blocks of an FPGA.
WC and LTE 4G Broadband module 3- 2019 by Prof.Suresha VSURESHA V
This document provides an overview of Module 3 which covers the channel structure of LTE. It discusses:
1. The channel structure in LTE includes logical channels, transport channels, and physical channels. Logical channels provide services to higher layers, transport channels to lower layers, and physical channels handle actual transmission.
2. The LTE network architecture consists of the radio access network (E-UTRAN) and core network (EPC). E-UTRAN includes eNodeBs while EPC includes MME, SGW, PGW, and PCRF.
3. The radio interface protocol stack separates into control and user planes. It consists of layers like RRC, PDCP, RLC, MAC
This document proposes using uplink RTS/CTS control to improve the performance of distributed station coordination (DSC) in dense wireless local area networks. It presents simulation results using the NS-3 simulator showing that selectively enabling RTS/CTS for stations based on their frame error rate can significantly increase aggregate throughput, decrease frame error rate, and improve fairness compared to DSC without RTS/CTS. The performance gains are greater for larger frame sizes. Partial usage of RTS/CTS for a subset of stations is also evaluated.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document summarizes research on improving the performance of WiMAX systems using FEC zigzag coding and MIMO techniques. It first provides background on WiMAX and discusses how OFDM, MIMO, and various channel coding schemes like zigzag codes work. It then evaluates the bit-error rate performance of WiMAX systems using zigzag-coded modulation with different code rates and lengths. The results show zigzag coding presents stronger error correction than Reed-Solomon with Convolutional coding. Encoding and decoding of zigzag codes is explained, along with how concatenated zigzag codes provide even stronger error correction through interleaving and turbo processing.
FDDI is a 100 Mbps dual-ring fiber optic network that uses counter-rotating primary and secondary rings. It uses single-mode or multi-mode fiber, with single-mode using lasers and multi-mode using LEDs. FDDI defines MAC, PHY, PMD and SMT specifications. ISDN is an international standard for digital phone lines that supports up to 64 Kbps data transfer for basic rate interface and higher for primary rate interface, allowing transmission of voice and data over phone lines.
Communication Performance Over A Gigabit Ethernet NetworkIJERA Editor
A present computing imposes heavy demands on the optical communication network. Gigabit Ethernet technology can provide the required bandwidth to meet these demands. However, it has also involve the communication Impediment to progress from network media to TCP(Transfer control protocol) processing. In this paper, present an overview of Gigabit per second Ethernet technology and study the end-to-end Gigabit Ethernet communication bandwidth and retrieval time. Performance graphs are collected using NetPipe in this clearly show the performance characteristics of TCP/IP over Gigabit Ethernet. These indicate the impact of a number of factors such as processor speeds, network adaptors, versions of the Linux Kernel or opnet softwar and device drivers, and TCP/IP(Internet protocol) tuning on the performance of Gigabit Ethernet between two Pentium II/350 PCs. Among the important conclusions are the marked superiority of the 2.1.121 and later development kernels and 2.2.x production kernels of Linux or opnet softwar used and that the ability to increase the MTU(maximum transmission unit) Further than the Ethernet standard of 1500 could significantly enhance the throughput reachable.
This document summarizes an academic research study on autonomous arbitration systems in single car communication buses. It begins with an abstract that outlines increased demands for efficiency in electronic systems and the need for digital control systems and networking. It then discusses how today's vehicles have around 70-80 electronic control units that require organized digital bus communication between controllers. The document examines requirements for an efficient vehicle communication system, including reliability, flexibility, security and determinism. It proceeds to provide details on FireWire protocols and their use as a model for digital bus communication standards.
The document describes a study that fabricated Al-10% Al2O3-10% ZrO2 nanocomposite powders using high-energy ball milling. The powders were milled for various time periods up to 45 hours. Characterization of the milled powders found that milling resulted in a uniform distribution of the Al2O3 and ZrO2 reinforcements in the Al matrix. X-ray diffraction analysis showed increased peak broadening with longer milling times, indicating reduced crystallite size and increased lattice strain. Crystallite size measurements found sizes decreased to around 25 nm after 45 hours of milling. Scanning electron microscopy images confirmed the uniform distribution of reinforcements and decreasing particle size
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document examines the reactivity of cement combinations containing Portland cement, fly ash, silica fume, and metakaolin by investigating their calcium hydroxide (Ca(OH)2) consumption. Various binary and ternary cement pastes were tested at ages of 28, 90, and 180 days. The results show that silica fume consumed the most Ca(OH)2, followed by metakaolin, then fly ash. Ca(OH)2 consumption increased with age and addition content up to certain limits. Combinations with finer pozzolans like silica fume and metakaolin showed higher reactivity, especially at early ages.
This document discusses Ethernet ring protection for carrier Ethernet networks. It outlines the Ethernet ring protection switching mechanism defined in ITU-T G.8032, which provides automatic protection switching for Ethernet topologies forming a closed loop. The mechanism utilizes existing Ethernet MAC and bridge functions to achieve fast protection switching in under 50 milliseconds. It also introduces some issues for further standardization to enhance Ethernet ring protection.
The document discusses the new 400 Gigabit Ethernet standard, which allows for extremely high bandwidth connectivity. A key development is that 1 RU switches can now provide up to 12.8 Terabits per second of bandwidth using 400GbE ports. 400GbE uses 50Gbps serializers/deserializers across 8 lanes to achieve its high speeds. Typical deployments of 400GbE switches include use in super spines for data center networks or in telecom networks for aggregation.
This document discusses various networking technologies including media types, network topologies, and LAN standards. It describes common media like twisted-pair cable, coaxial cable, and fiber optic cable. It also discusses network topologies like star, ring, and bus. Finally, it summarizes several LAN standards including Ethernet, Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet and how they have evolved to support higher bandwidths. It also briefly mentions other technologies like Token Ring, LocalTalk, and FDDI.
This document describes the design and implementation of an IP core for the CAN protocol. It begins with an introduction to CAN and its use in automotive and industrial applications. It then discusses the protocol layers, frame formats, arbitration, and error handling mechanisms of CAN. The document proceeds to describe the design of Verilog modules for a CAN transceiver including transmitter and receiver modules. It presents simulation waveforms showing the transmission and reception of CAN frames between two FPGA boards. It concludes that the IP core was successfully implemented on Spartan 3 and Spartan 6 FPGAs to demonstrate node-to-node communication over a CAN bus.
Performance Improvement of IEEE 802.22 WRAN Physical LayerIOSR Journals
The spectrum available for the wireless services is limited, the increased demand of wireless
application has put a lot of limitations on the utilization of available radio spectrum. For the efficient spectrum
utilization for wireless application IEEE 802.22 standard i.e. WRAN (Wireless Regional Area Network) is
developed which is based on cognitive radio technique that senses the free available spectrum. It allows sharing
of geographically unused channels allocated to the TV Broadcast Service, without interference.
In this paper we are evaluating the performance of WRAN over physical layer with QPSK, 16-QAM
and 64-QAM modulation with Convolution coding with code rate of 1/2, 2/3, 3/4, 5/6 and obtaining the BER
curves for rician channel. Simulation is performed in MATLAB
IRJET-Analysis of Medium Access Protocols with Channel Bonding for Cognitive ...IRJET Journal
This document analyzes the performance of medium access control (MAC) protocols with channel bonding for cognitive radio networks operating on television (TV) bands. It studies the slotted ALOHA and non-persistent CSMA MAC protocols using two orthogonal frequency-division multiplexing (OFDM) schemes: fixed-carrier number (FCN) and fixed-carrier spacing (FCS). The document presents an analytical model for throughput estimation and simulations of the MAC protocols with FCN and FCS OFDM on different TV channel widths. The results show that the non-persistent CSMA protocol achieves better performance than slotted ALOHA, and that channel capture effects are significant.
Transceiver Options for Brocade 5100 SwitchMonica Geller
Nowadays, many small and medium business and organizations such as local government, campus and some agencies etc., require fast and frequent access to database the files. A storage Area Network (SAN) with Fibre Channel (FC) switching technology (Figure 1) offers the speed and reliability for them. Brocade 5100 switch is an ideal Fibre Channel switch used for those organizations and can meet a variety of SAN environments.
Network resources allocated for particular application traffic are aware of the characteristics of L4+ content to be transmitted. One embodiment of the invention realizes network resource allocation in terms of three intelligent modules, gateway, provisioning and classification. A gateway module exerts network control functions in response to application requests for network resources. The network control functions include traffic path setup, bandwidth allocation and so on. Characteristics of the content are also specified in the received application network resource requests. Under request of the gateway module, a provisioning module allocates network resources such as bandwidth in optical networks and edge devices as well. An optical network resource allocation leads to a provisioning optical route. Under request of the gateway module, a classification module differentiates applications traffic according to content specifications, and thus creates and applies content-aware rule data for edge devices to forward content-specified traffic towards respective provisioning optical routes.
https://www.google.com/patents/US7580349?dq=US+7580349&hl=en&sa=X&ei=DXVSVID-EoTc8AW-_IDwBw&ved=0CB8Q6AEwAA
This document summarizes the physical layer frame structure used in 4G LTE and LTE-Advanced downlink transmissions. It describes how the LTE system toolbox in MATLAB can be used to generate physical signals and channels, and map them to resource elements in the time-frequency grid. Key aspects covered include the use of OFDM, resource block structure, and how synchronization signals, broadcast channels, control channels, and shared data channels are allocated in the frame. The document provides technical details on frame configurations and illustrates example resource grids for a subframe and radio frame.
This document discusses how the theoretical peak throughput of 300 Mbps for LTE systems is calculated. It begins by introducing some of the key concepts in LTE including Long Term Evolution (LTE), the LTE architecture, and duplexing methods like Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD). It then explains how parameters of the LTE physical layer such as bandwidth, modulation, coding rate, and multiple-input multiple-output (MIMO) techniques impact the calculation of throughput. The document demonstrates throughput calculations for both FDD and TDD systems using these parameters and assumptions from the 3GPP specifications. It concludes by showing example calculations of downlink and uplink throughput for 20
ARINC 629 was an early avionics network standard from the 1970s, but it could not meet the challenges of modern integrated modular avionics. AFDX (Avionics Full DupleX Switched Ethernet) was developed as a faster replacement based on Ethernet. AFDX uses virtual links with guaranteed bandwidth and latency to ensure safety-critical data transport. It provides redundancy through a switched topology and static addressing to avoid the variable latency of standard Ethernet networks. AFDX has been adopted as it combines the reliability of older avionics standards with high-speed connectivity required for modern aircraft systems.
This document discusses the implementation of an interleaver on an FPGA for wireless communication systems. It proposes a novel finite state machine (FSM) based approach to model a multimode address generator for a WiMAX interleaver using VHDL on an FPGA. The proposed interleaver works better at high frequencies compared to existing FPGA approaches and uses minimal logic cells. It also studies interleaving techniques in OFDM-based wireless local area networks and discusses designing the interleaver using the internal memory blocks of an FPGA.
WC and LTE 4G Broadband module 3- 2019 by Prof.Suresha VSURESHA V
This document provides an overview of Module 3 which covers the channel structure of LTE. It discusses:
1. The channel structure in LTE includes logical channels, transport channels, and physical channels. Logical channels provide services to higher layers, transport channels to lower layers, and physical channels handle actual transmission.
2. The LTE network architecture consists of the radio access network (E-UTRAN) and core network (EPC). E-UTRAN includes eNodeBs while EPC includes MME, SGW, PGW, and PCRF.
3. The radio interface protocol stack separates into control and user planes. It consists of layers like RRC, PDCP, RLC, MAC
This document proposes using uplink RTS/CTS control to improve the performance of distributed station coordination (DSC) in dense wireless local area networks. It presents simulation results using the NS-3 simulator showing that selectively enabling RTS/CTS for stations based on their frame error rate can significantly increase aggregate throughput, decrease frame error rate, and improve fairness compared to DSC without RTS/CTS. The performance gains are greater for larger frame sizes. Partial usage of RTS/CTS for a subset of stations is also evaluated.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document summarizes research on improving the performance of WiMAX systems using FEC zigzag coding and MIMO techniques. It first provides background on WiMAX and discusses how OFDM, MIMO, and various channel coding schemes like zigzag codes work. It then evaluates the bit-error rate performance of WiMAX systems using zigzag-coded modulation with different code rates and lengths. The results show zigzag coding presents stronger error correction than Reed-Solomon with Convolutional coding. Encoding and decoding of zigzag codes is explained, along with how concatenated zigzag codes provide even stronger error correction through interleaving and turbo processing.
FDDI is a 100 Mbps dual-ring fiber optic network that uses counter-rotating primary and secondary rings. It uses single-mode or multi-mode fiber, with single-mode using lasers and multi-mode using LEDs. FDDI defines MAC, PHY, PMD and SMT specifications. ISDN is an international standard for digital phone lines that supports up to 64 Kbps data transfer for basic rate interface and higher for primary rate interface, allowing transmission of voice and data over phone lines.
Communication Performance Over A Gigabit Ethernet NetworkIJERA Editor
A present computing imposes heavy demands on the optical communication network. Gigabit Ethernet technology can provide the required bandwidth to meet these demands. However, it has also involve the communication Impediment to progress from network media to TCP(Transfer control protocol) processing. In this paper, present an overview of Gigabit per second Ethernet technology and study the end-to-end Gigabit Ethernet communication bandwidth and retrieval time. Performance graphs are collected using NetPipe in this clearly show the performance characteristics of TCP/IP over Gigabit Ethernet. These indicate the impact of a number of factors such as processor speeds, network adaptors, versions of the Linux Kernel or opnet softwar and device drivers, and TCP/IP(Internet protocol) tuning on the performance of Gigabit Ethernet between two Pentium II/350 PCs. Among the important conclusions are the marked superiority of the 2.1.121 and later development kernels and 2.2.x production kernels of Linux or opnet softwar used and that the ability to increase the MTU(maximum transmission unit) Further than the Ethernet standard of 1500 could significantly enhance the throughput reachable.
This document summarizes an academic research study on autonomous arbitration systems in single car communication buses. It begins with an abstract that outlines increased demands for efficiency in electronic systems and the need for digital control systems and networking. It then discusses how today's vehicles have around 70-80 electronic control units that require organized digital bus communication between controllers. The document examines requirements for an efficient vehicle communication system, including reliability, flexibility, security and determinism. It proceeds to provide details on FireWire protocols and their use as a model for digital bus communication standards.
The document describes a study that fabricated Al-10% Al2O3-10% ZrO2 nanocomposite powders using high-energy ball milling. The powders were milled for various time periods up to 45 hours. Characterization of the milled powders found that milling resulted in a uniform distribution of the Al2O3 and ZrO2 reinforcements in the Al matrix. X-ray diffraction analysis showed increased peak broadening with longer milling times, indicating reduced crystallite size and increased lattice strain. Crystallite size measurements found sizes decreased to around 25 nm after 45 hours of milling. Scanning electron microscopy images confirmed the uniform distribution of reinforcements and decreasing particle size
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document examines the reactivity of cement combinations containing Portland cement, fly ash, silica fume, and metakaolin by investigating their calcium hydroxide (Ca(OH)2) consumption. Various binary and ternary cement pastes were tested at ages of 28, 90, and 180 days. The results show that silica fume consumed the most Ca(OH)2, followed by metakaolin, then fly ash. Ca(OH)2 consumption increased with age and addition content up to certain limits. Combinations with finer pozzolans like silica fume and metakaolin showed higher reactivity, especially at early ages.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
This document summarizes an innovative strategy for a water supply project in Okpuno Town, Nigeria. It proposes using a community-based organization and linear programming to minimize costs. The strategy involves developing sustainable water services, providing safe water, improving public health, developing private sector support, and supplying water at the right price and quality. Linear programming is used to optimally allocate limited funds between training workers for project implementation and ongoing maintenance. The optimal solution allocates most funds to training workers for project implementation. An empowered, community-based organization is best to ensure long-term sustainability through local ownership, responsibility and commitment.
The document discusses optimal conditions for the depolymerization of butyl lactate oligomers in different reactor types. It examines the effects of temperature and residual pressure on lactide yield, meso-lactide byproduct yield, and reactor productivity. Depolymerization experiments were conducted in a batch reactor, periodic rotary film evaporator, and continuous rotary film evaporator. The results showed that the continuous rotary film evaporator at 220°C and 20 mm Hg residual pressure provided the highest lactide yield and reactor productivity, making it the optimal reactor and conditions for the depolymerization stage.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document summarizes a study on magnetohydrodynamic (MHD) flow in parallel pipes with parallel and counter flow patterns using computational fluid dynamics (CFD) analysis. The study models liquid metal flow through two parallel pipes with either parallel or counter flow, subjected to a magnetic field. For parallel flow, the velocity profile at the centerline shows higher velocities at the ends and lower velocity in the middle due to current flow patterns. For counter flow, the centerline velocity profile is inverted with higher velocity in the middle. Current density profiles also differ between the two flow patterns. The CFD analysis was performed using ANSYS Fluent software to analyze the effects of MHD on velocity profile, pressure, and current density for
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
This document discusses various techniques for medical and grayscale image enhancement. It begins by introducing common issues with medical images like poor contrast that require enhancement. Several methods are described, including image negation, histogram equalization, discrete wavelet transform (DWT)-based enhancement, and brightness preserving bi-histogram equalization (BPHE). These techniques are evaluated based on metrics like peak signal-to-noise ratio (PSNR), mean squared error (MSE), and contrast. Results show that different methods can effectively enhance images for medical or other applications by increasing features or contrast.
The document discusses the development of 40 Gigabit Ethernet and 100 Gigabit Ethernet standards. It notes that in 2006, the IEEE determined these faster speeds were needed - 40 Gbps for computing and 100 Gbps for network aggregation. The IEEE formed a task force in 2008 to develop these standards. Key aspects included preserving the Ethernet frame format while supporting faster speeds over fiber and copper cable. The physical coding sublayer implements a multilane distribution scheme to help meet engineering challenges, distributing data across multiple "lanes" to support various interface widths.
The Performance Evaluation of IEEE 802.16 Physical Layer in the Basis of Bit ...IJCI JOURNAL
Fixed Broadband Wireless Access is a promising technology which can offer high speed data rate from transmitting end to customer end which can offer high speed text, voice, and video data. IEEE 802.16 WirelessMAN is a standard that specifies medium access control layer and a set of PHY layer to fixed and mobile BWA in broad range of frequencies and it supports equipment manufacturers due to its robust performance in multipath environment. Consequently WiMAX forum has adopted this version to develop the network world wide. In this paper the performance of IEEE 802.16 OFDM PHY Layer has been investigated by using the simulation model in Matlab. The Stanford University Interim (SUI) channel models are selected for the performance evaluation of this standard. The Ideal Channel estimation is considered in this work and the performance evaluation is observed in the basis of BER.
The document discusses several communication protocols that are important for the Internet of Things (IoT), including IEEE 802.15.4, Zigbee, 6LoWPAN, Wireless HART, Z-Wave, ISA 100, Bluetooth, NFC, and RFID. It provides details on IEEE 802.15.4, including its features, variants, and introduction to related protocols like Zigbee, 6LoWPAN, and Wireless HART.
This document discusses the increasing bandwidth requirements for fronthaul networks that connect baseband units and remote radio heads as newer wireless technologies like LTE-Advanced are deployed. It notes that while CPRI standards have increased maximum line rates up to 24 Gbps, this still may not provide enough capacity for the highest configurations of LTE-A defined by 3GPP. The document argues that compression techniques will be necessary to support LTE-A features within the bandwidth limits of existing fiber networks, and it reviews lossy and lossless compression approaches.
This document discusses the growing bandwidth demands on network infrastructure driven by increases in smart devices and cloud services. It explains that security and networking platforms need to support high-speed interfaces from 10Gbps to 100Gbps to keep up with demand. The document promotes the Artesyn Centellis platform as a scalable AdvancedTCA solution that can support up to 1.6Tbps today and up to 4.0Tbps in the future using the same chassis and backplane. It details how the platform achieves this high performance using QuadStar switching fabric and 100Gbps backplane links.
Ethernet is a family of networking technologies commonly used in LANs, MANs and WANs. It was first standardized in 1983 at 10 Mbps and has since been updated to support higher speeds up to 10 Gbps. Fast Ethernet runs at 100 Mbps using the same frame format as standard Ethernet. Gigabit Ethernet runs at 1 Gbps while maintaining compatibility. Ten-Gigabit Ethernet operates at 10 Gbps while keeping the same frame format as prior standards.
Design of an efficient binary phase-shift keying based IEEE 802.15.4 transce...IJECEIAES
The IEEE 802.15.4 physical layer (PHY) standard is one of the communication standards with wireless features by providing low-power and low-data rates in wireless personal area network (WPAN) applications. In this paper, an efficient IEEE 802.15.4 digital transceiver hardware architecture is designed using the binary phase-shift keying (BPSK) technique. The transceiver mainly has transmitter and receiver modules along with the error calculation unit. The BPSK modulation and demodulation are designed using a digital frequency synthesizer (DFS). The DFS is used to generate the in-phase (I) and quadrature-phase (Q) signals and also provides better system performance than the conventional voltagecontrolled oscillator (VCO) and look up table (LUT) based memory methods. The differential encoding-decoding mechanism is incorporated to recover the bits effectively and to reduce the hardware complexity. The simulation results are illustrated and used to find the error bits. The design utilizes less chip area, works at 268.2 MHz, and consumes 108 mW of total power. The IEEE 802.15.4 transceiver provides a latency of 3.5 clock cycles and works with a throughput of 76.62 Mbps. The bit error rate (BER) of 2×10-5 is achieved by the proposed digital transceiver and is suitable for real-time applications. The work is compared with existing similar approaches with better improvement in performance parameters.
Performance Improvement of IEEE 802.22 WRAN Physical LayerIOSR Journals
Abstract: The spectrum available for the wireless services is limited, the increased demand of wireless
application has put a lot of limitations on the utilization of available radio spectrum. For the efficient spectrum
utilization for wireless application IEEE 802.22 standard i.e. WRAN (Wireless Regional Area Network) is
developed which is based on cognitive radio technique that senses the free available spectrum. It allows sharing
of geographically unused channels allocated to the TV Broadcast Service, without interference.
In this paper we are evaluating the performance of WRAN over physical layer with QPSK, 16-QAM
and 64-QAM modulation with Convolution coding with code rate of 1/2, 2/3, 3/4, 5/6 and obtaining the BER
curves for rician channel. Simulation is performed in MATLAB.
Keywords - CC, CP, CR, OFDMA, PHY Layer, WRAN
Performance Improvement of IEEE 802.22 WRAN Physical LayerIOSR Journals
Abstract: The spectrum available for the wireless services is limited, the increased demand of wireless application has put a lot of limitations on the utilization of available radio spectrum. For the efficient spectrum utilization for wireless application IEEE 802.22 standard i.e. WRAN (Wireless Regional Area Network) is developed which is based on cognitive radio technique that senses the free available spectrum. It allows sharing of geographically unused channels allocated to the TV Broadcast Service, without interference. In this paper we are evaluating the performance of WRAN over physical layer with QPSK, 16-QAM and 64-QAM modulation with Convolution coding with code rate of 1/2, 2/3, 3/4, 5/6 and obtaining the BER curves for rician channel. Simulation is performed in MATLAB. Keywords - CC, CP, CR, OFDMA, PHY Layer, WRAN
An efficient ultra-wideband digital transceiver for wireless applications on...IJECEIAES
The ultra-wideband (UWB) technology is a promising short-range communication technology for most wireless applications. The UWB works at higher frequencies and is affected by interferences with the same frequency standards. This manuscript has designed an efficient and lowcost implementation of IEEE 802.15.4a-based UWB-digital transceiver (DTR). The design module contains UWB transmitter (TX), channel, and UWB-receiver (RX) units. Convolutional encoding and modulation units like burst position modulation and binary phase-shift keying modulation are used to construct the UWB-TX. The synchronization and Viterbi decoder units are used to recover the original data bits and are affected by noise in UWB-RX. The UWB-DTR is synthesized using Xilinx ISE® environment with Verilog hardware description language (HDL) and implemented on Artix-7 field-programmable gate array (FPGA). The UWB-DTR utilizes less than 2% (slices and look-up table/LUTs), operates at 268 MHz, and consumes 91 mW of total power on FPGA. The transceiver achieves a 6.86 Mbps data rate, which meets the IEEE 802.15.4a standard. The UWB-DTR module obtains the bit error rate (BER) of 2×10-4 by transmitting 105 data bits. The UWB-DTR module is compared with similar physical layer (PHY) transceivers with improvements in chip area (slices), power, data rate, and BER.
International Journal of Engineering and Science Invention (IJESI)inventionjournals
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online
The document provides an overview of Avionics Full-Duplex Switched Ethernet (AFDX), a deterministic network based on Ethernet that provides guaranteed bandwidth and quality of service for avionics systems. AFDX addresses limitations of standard Ethernet by utilizing virtual links to emulate point-to-point connections with dedicated bandwidth. The document then describes how Actel FPGAs and intellectual property cores can be used to implement AFDX-compliant interfaces for use in avionics systems.
The ever-increasing demand for various multimedia applications and services as well as the need for bandwidth expansions and faster data rates are becoming a challenge for every data center everywhere.
IEEE 802 Standard Network’s Comparison under Grid and Random Node Arrangement...Eswar Publications
The IEEE 802 standard well-known as 802.11 called as Wi-Fi network, 802.15.4 called as ZigBee or sensor network and 802.15.1 called as Bluetooth network. The network such as ZigBee, Bluetooth and Wi-Fi works in 2.4 GHz ISM band. All the above networks works in same ISM band of 2.4 GHz, but the performance of the network varies. The performance of simulation depends upon the coverage area, data rates, and power consumption in each network. The heterogeneous network performances is evaluated with static and mobility model in random and grid node placement by varying the traffic loads of one CBR and with five CBR for each network. The
simulation result is compared in terms of jitter, average end to end delay and throughput to analyze the network performance in the 2.4 GHz frequency band. IEEE 802.11 network shows the low jitter and delay value with high throughput compared with sensor network.
The ever-increasing demand for various multimedia applications and services as well as the need for bandwidth expansions and faster data rates are becoming a challenge for every data center everywhere. Follow this link https://www.cbo-it.de/
The document discusses several topics related to computer networking including network topologies, physical and logical topologies, OSI and TCP/IP models, IP addressing, subnetting, routers, routing protocols, VLANs, and data flow diagrams. It provides information on LAN/MAN/WAN standards, the seven layers of the OSI model, classes of IP addresses, configuring router interfaces, routing protocols like OSPF and EIGRP, using VLANs to segment networks, and creating basic data flow diagrams.
The document describes a Virtex-4 FPGA implementation of a Resilient Packet Ring (RPR) Media Access Control (MAC) solution that provides full compliance with the IEEE 802.17 standard for RPR networks. The implementation utilizes the Virtex-4 FPGA to create a compact dual-ring RPR MAC that requires only 11,000 slices and 80 block RAMs. The document also provides background on RPR networks and discusses applications like metro networks and wireless backhaul.
Next Generation 4G WiMAX Networks - IEEE 802.16 Standard: cscpconf
This paper gives an overview about the various PHY and MAC layer specification which define
the IEEE 802.16 standard and which define the Fixed WiMAX (Ver. 802.16d-2004) and Mobile
WiMAX (Ver. 802.16e-2005) network scenarios. We also discuss about the various updates in
the Advanced Air Interface update (802.16m – 2011), which aims at fulfilling the 4G requirements as put forward by the ITU IMT-Advanced requirements.
Serial interface module for ethernet based applicationseSAT Journals
Abstract The introduction of Field Programmable Gate Arrays (FPGAs) which includes thousands of logic gates has made it feasible to prove specific software function on the particular hardware. This reduces the design time and the execution time and makes the embedded system to respond faster as a real time system. This paper serial interface module for Ethernet based Applications deals with the Study and the implementation of the Tri-mode Ethernet Media access control (TEMAC) which is present in the FPGA core. The Virtex-5 FPGA supports the 10Mbps, 100Mbps as well as 1000Mbps but in this paper contains the implementation of 1000Mbps (1Gigabit bits per second) data transfer rate. This project basically deals with communication established between the FPGA core and the PC. The IP core is interfaced with its transceiver module and communicated to the PC using Ethernet medium. The communication established is verified by interfacing the FIFO and the UART VHDL codes to the TEMAC IP core present on the Virtex-5 FPGA. The result at each module is verified on the Chipscope pro analyzer and the packet transmitted from FPGA to the PC is verified on the Wireshark software. Key Words: FPGA, Ethernet, TEMAC core , and Gigabit.
Wireless Ad Hoc Networking Lecture NotesDrAdeelAkram2
This document provides an outline and overview of a paper on wireless ad hoc networks. The paper discusses IEEE 802.11 standards, the open systems interconnection model, layers of the network including physical, datalink, network and transport layers. It compares ad hoc and infrastructure network topologies and discusses applications and future implementations of ad hoc networks such as for personal, military and emergency use.
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...Alex Pruden
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
How information systems are built or acquired puts information, which is what they should be about, in a secondary place. Our language adapted accordingly, and we no longer talk about information systems but applications. Applications evolved in a way to break data into diverse fragments, tightly coupled with applications and expensive to integrate. The result is technical debt, which is re-paid by taking even bigger "loans", resulting in an ever-increasing technical debt. Software engineering and procurement practices work in sync with market forces to maintain this trend. This talk demonstrates how natural this situation is. The question is: can something be done to reverse the trend?
Main news related to the CCS TSI 2023 (2023/1695)Jakub Marek
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
Essentials of Automations: Exploring Attributes & Automation ParametersSafe Software
Building automations in FME Flow can save time, money, and help businesses scale by eliminating data silos and providing data to stakeholders in real-time. One essential component to orchestrating complex automations is the use of attributes & automation parameters (both formerly known as “keys”). In fact, it’s unlikely you’ll ever build an Automation without using these components, but what exactly are they?
Attributes & automation parameters enable the automation author to pass data values from one automation component to the next. During this webinar, our FME Flow Specialists will cover leveraging the three types of these output attributes & parameters in FME Flow: Event, Custom, and Automation. As a bonus, they’ll also be making use of the Split-Merge Block functionality.
You’ll leave this webinar with a better understanding of how to maximize the potential of automations by making use of attributes & automation parameters, with the ultimate goal of setting your enterprise integration workflows up on autopilot.
In the realm of cybersecurity, offensive security practices act as a critical shield. By simulating real-world attacks in a controlled environment, these techniques expose vulnerabilities before malicious actors can exploit them. This proactive approach allows manufacturers to identify and fix weaknesses, significantly enhancing system security.
This presentation delves into the development of a system designed to mimic Galileo's Open Service signal using software-defined radio (SDR) technology. We'll begin with a foundational overview of both Global Navigation Satellite Systems (GNSS) and the intricacies of digital signal processing.
The presentation culminates in a live demonstration. We'll showcase the manipulation of Galileo's Open Service pilot signal, simulating an attack on various software and hardware systems. This practical demonstration serves to highlight the potential consequences of unaddressed vulnerabilities, emphasizing the importance of offensive security practices in safeguarding critical infrastructure.
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectorsDianaGray10
Join us to learn how UiPath Apps can directly and easily interact with prebuilt connectors via Integration Service--including Salesforce, ServiceNow, Open GenAI, and more.
The best part is you can achieve this without building a custom workflow! Say goodbye to the hassle of using separate automations to call APIs. By seamlessly integrating within App Studio, you can now easily streamline your workflow, while gaining direct access to our Connector Catalog of popular applications.
We’ll discuss and demo the benefits of UiPath Apps and connectors including:
Creating a compelling user experience for any software, without the limitations of APIs.
Accelerating the app creation process, saving time and effort
Enjoying high-performance CRUD (create, read, update, delete) operations, for
seamless data management.
Speakers:
Russell Alfeche, Technology Leader, RPA at qBotic and UiPath MVP
Charlie Greenberg, host
Digital Banking in the Cloud: How Citizens Bank Unlocked Their MainframePrecisely
Inconsistent user experience and siloed data, high costs, and changing customer expectations – Citizens Bank was experiencing these challenges while it was attempting to deliver a superior digital banking experience for its clients. Its core banking applications run on the mainframe and Citizens was using legacy utilities to get the critical mainframe data to feed customer-facing channels, like call centers, web, and mobile. Ultimately, this led to higher operating costs (MIPS), delayed response times, and longer time to market.
Ever-changing customer expectations demand more modern digital experiences, and the bank needed to find a solution that could provide real-time data to its customer channels with low latency and operating costs. Join this session to learn how Citizens is leveraging Precisely to replicate mainframe data to its customer channels and deliver on their “modern digital bank” experiences.
For the full video of this presentation, please visit: https://www.edge-ai-vision.com/2024/06/how-axelera-ai-uses-digital-compute-in-memory-to-deliver-fast-and-energy-efficient-computer-vision-a-presentation-from-axelera-ai/
Bram Verhoef, Head of Machine Learning at Axelera AI, presents the “How Axelera AI Uses Digital Compute-in-memory to Deliver Fast and Energy-efficient Computer Vision” tutorial at the May 2024 Embedded Vision Summit.
As artificial intelligence inference transitions from cloud environments to edge locations, computer vision applications achieve heightened responsiveness, reliability and privacy. This migration, however, introduces the challenge of operating within the stringent confines of resource constraints typical at the edge, including small form factors, low energy budgets and diminished memory and computational capacities. Axelera AI addresses these challenges through an innovative approach of performing digital computations within memory itself. This technique facilitates the realization of high-performance, energy-efficient and cost-effective computer vision capabilities at the thin and thick edge, extending the frontier of what is achievable with current technologies.
In this presentation, Verhoef unveils his company’s pioneering chip technology and demonstrates its capacity to deliver exceptional frames-per-second performance across a range of standard computer vision networks typical of applications in security, surveillance and the industrial sector. This shows that advanced computer vision can be accessible and efficient, even at the very edge of our technological ecosystem.
For the full video of this presentation, please visit: https://www.edge-ai-vision.com/2024/06/temporal-event-neural-networks-a-more-efficient-alternative-to-the-transformer-a-presentation-from-brainchip/
Chris Jones, Director of Product Management at BrainChip , presents the “Temporal Event Neural Networks: A More Efficient Alternative to the Transformer” tutorial at the May 2024 Embedded Vision Summit.
The expansion of AI services necessitates enhanced computational capabilities on edge devices. Temporal Event Neural Networks (TENNs), developed by BrainChip, represent a novel and highly efficient state-space network. TENNs demonstrate exceptional proficiency in handling multi-dimensional streaming data, facilitating advancements in object detection, action recognition, speech enhancement and language model/sequence generation. Through the utilization of polynomial-based continuous convolutions, TENNs streamline models, expedite training processes and significantly diminish memory requirements, achieving notable reductions of up to 50x in parameters and 5,000x in energy consumption compared to prevailing methodologies like transformers.
Integration with BrainChip’s Akida neuromorphic hardware IP further enhances TENNs’ capabilities, enabling the realization of highly capable, portable and passively cooled edge devices. This presentation delves into the technical innovations underlying TENNs, presents real-world benchmarks, and elucidates how this cutting-edge approach is positioned to revolutionize edge AI across diverse applications.
Fueling AI with Great Data with Airbyte WebinarZilliz
This talk will focus on how to collect data from a variety of sources, leveraging this data for RAG and other GenAI use cases, and finally charting your course to productionalization.
Skybuffer SAM4U tool for SAP license adoptionTatiana Kojar
Manage and optimize your license adoption and consumption with SAM4U, an SAP free customer software asset management tool.
SAM4U, an SAP complimentary software asset management tool for customers, delivers a detailed and well-structured overview of license inventory and usage with a user-friendly interface. We offer a hosted, cost-effective, and performance-optimized SAM4U setup in the Skybuffer Cloud environment. You retain ownership of the system and data, while we manage the ABAP 7.58 infrastructure, ensuring fixed Total Cost of Ownership (TCO) and exceptional services through the SAP Fiori interface.
AppSec PNW: Android and iOS Application Security with MobSFAjin Abraham
Mobile Security Framework - MobSF is a free and open source automated mobile application security testing environment designed to help security engineers, researchers, developers, and penetration testers to identify security vulnerabilities, malicious behaviours and privacy concerns in mobile applications using static and dynamic analysis. It supports all the popular mobile application binaries and source code formats built for Android and iOS devices. In addition to automated security assessment, it also offers an interactive testing environment to build and execute scenario based test/fuzz cases against the application.
This talk covers:
Using MobSF for static analysis of mobile applications.
Interactive dynamic security assessment of Android and iOS applications.
Solving Mobile app CTF challenges.
Reverse engineering and runtime analysis of Mobile malware.
How to shift left and integrate MobSF/mobsfscan SAST and DAST in your build pipeline.
Ivanti’s Patch Tuesday breakdown goes beyond patching your applications and brings you the intelligence and guidance needed to prioritize where to focus your attention first. Catch early analysis on our Ivanti blog, then join industry expert Chris Goettl for the Patch Tuesday Webinar Event. There we’ll do a deep dive into each of the bulletins and give guidance on the risks associated with the newly-identified vulnerabilities.
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen!
Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell.
Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten.
Diese Themen werden behandelt
- Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten
- Wie funktionieren CCB- und CCX-Lizenzen wirklich?
- Verstehen des DLAU-Tools und wie man es am besten nutzt
- Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw.
- Praxisbeispiele und Best Practices zum sofortigen Umsetzen
Taking AI to the Next Level in Manufacturing.pdfssuserfac0301
Read Taking AI to the Next Level in Manufacturing to gain insights on AI adoption in the manufacturing industry, such as:
1. How quickly AI is being implemented in manufacturing.
2. Which barriers stand in the way of AI adoption.
3. How data quality and governance form the backbone of AI.
4. Organizational processes and structures that may inhibit effective AI adoption.
6. Ideas and approaches to help build your organization's AI strategy.
GraphRAG for LifeSciences Hands-On with the Clinical Knowledge Graph
Cr33562566
1. Krunal Kapadiya / International Journal of Engineering Research and Applications
(IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 3, May-Jun 2013, pp.562-566
562 | P a g e
Ethernet 40-100 Gbps and future trends
Krunal Kapadiya
(Department of Electronics & Communication Engineering, Gujarat Technological University, Ahmedabad –
382424, India,)
ABSTRACT
Ethernet 40-100 Gbps or IEEE 802.3ba
is an IEEE standard of the IEEE 802.3 family of
data link layer standards for Ethernet LAN and
WAN applications, whose objective is to support
speeds faster than 10 gigabits per second (Gbps).
The standard supports 40 Gbps and 100 Gbps
transfer rates.
Keywords – IEEE, Ethernet, OSI (Open System
Interconnection), MII (Media Independent
Interface), AUI (Attachment Unit Interface).
1. INTRODUCTION
IEEE 802.3ba (also known by its proposed
standard name IEEE P802.3ba) is an IEEE standard
of the 802.3 family of data link layer standards for
Ethernet LAN and WAN applications, whose
objective is to support speeds faster than 10 gigabits
per second (Gbps). The standard supports 40 Gbps
and 100 Gbps transfer rates.
The IEEE 802.3 working group is
concerned with the maintenance and extension of the
Ethernet data communications standard. Additions to
the 802.3 standard are performed by task forces
which are designated by one or two letters. For
example the 802.3z task force drafted the original
gigabit Ethernet standard.
802.3ba is the designation given to the higher speed
Ethernet task force which is working on
modifications to support speeds higher than 10
Gbps.
The chosen speeds are 40 and 100 Gbps to
support both end-point and link aggregation needs.
The Ethernet Alliance web site has information on
why these speeds were chosen as does the PAR
(Project Authorization Request) sent to the IEEE.
This is the first time two different Ethernet speeds
have been specified in a single standard. The
decision to include both speeds comes from pressure
to support the 40 Gbps rate for local server
applications and the 100 Gbps rate for internet
backbones. The standard was announced in July
2007 and was ratified on June 17, 2010.
Ethernet was developed at Xerox
PARC between 1973 and 1974. DIX (Digital
Equipment Corporation, Intel & Xerox Corporation)
promoted Ethernet as standard, specified 10 Mbps
Ethernet, with 48-bit destination and source
addresses and a global 16-bit Ether-type field in
1980s.
IEEE published Ethernet as 802.3 standard in 1985.
Then it evolved from 10Mbps Ethernet to 100 Mbps
Ethernet as IEEE 802.3u in 1995. Then it upgraded
to 1Gbps Ethernet as IEEE 802.3z in 1998, 10 Gbps
Ethernet as IEEE 802.3ae in 2002, IEEE 802.3ak in
2004, IEEE 802.3an in 2006, IEEE 802.3ap in 2007
and IEEE 802.3aq in 2006.
In July 2006, the IEEE 802.3 working
group formed the High Speed Study Group (HSSG)
to investigate new standards for high speed Ethernet.
In December 2007 a Project Authorization Request
(PAR) was approved and in January 2008 the HSSG
was renamed and met as the "IEEE 40Gb/s and
100Gbs Ethernet Task Force," moving the process to
the next stage of formalization.
This standard was approved at the June 2010 IEEE
Standards Board meeting under the name IEEE
Standard 802.3ba-2010.
2. ETHERNET PHYSICAL LAYER
When forming a complete physical layer, a PMD
shall be connected to the appropriate PMA, to the
medium through the MDI and to the management
functions that are optionally accessible through the
management interface.
Fig. 1. Ethernet Physical Layer Specifications
3. ETHERNET LAYER MODEL
40 Gigabit and 100 Gigabit Ethernet couples the
IEEE 802.3 MAC to a family of 40 Gbps and 100
Gbps Physical Layers. The relationships among 40
Gigabit and 100 Gigabit Ethernet, the IEEE 802.3
MAC, and the ISO Open System Interconnection
(OSI) reference model.
While this specification defines interfaces in terms
of bits, octets, and frames, implementations may
choose other data-path widths for implementation
convenience. The only exceptions are as follows:
a. The XLGMII and CGMII, which, when
implemented as a logical interconnection port
between the MAC sub-layer and the Physical
Layer (PHY), uses a 64-bit wide data path as
specified in Clause 81.
2. Krunal Kapadiya / International Journal of Engineering Research and Applications
(IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 3, May-Jun 2013, pp.562-566
563 | P a g e
b. The management interface, which, when
physically implemented as the MDIO/MDC
(Management Data Input/output and
Management Data Clock) at an observable
interconnection port, uses a bit-wide data path
as specified in Clause 45.
c. The PMA service interface, which, when
physically implemented as XLAUI (40 Gigabit
Attachment Unit Interface) at an observable
interconnection port, uses a 4 lane data path as
specified in Annex 83A or Annex 83B. The
PMA service interface, which, when physically
implemented as CAUI (100 Gigabit
Attachment Unit Interface) at an observable
interconnection port, uses a 10 lane data path as
specified in Annex 83A or Annex 83B.
d. The PMD service interface, which, when
physically implemented as XLPPI (40 Gigabit
Parallel Physical Interface) at an observable
interconnection port, uses a 4 lane data path as
specified in Annex 86A. The PMD service
interface, which, when physically implemented
as CPPI (100 Gigabit Parallel Physical
Interface) at an observable interconnection
port, uses a 10 lane data path as specified in
Annex 86A.
e. The MDIs as specified in Clause 84 for
40GBASE-KR4, in Clause 85 for 40GBASE-
CR4, in Clause 86 for 40GBASE-SR4, Clause
87 for 40GBASE-LR4 and in Clause 88 for
100GBASE-LR4 and 100GBASE-ER4 all use
a 4 lane data path. The MDIs as specified in
Clause 85 for 100GBASE-CR10 and in Clause
86 for 100GBASE-SR10 use a 10 lane data
path.
Fig. 2. Ethernet Layer Model
Physical Layer devices listed below are defined for
operation at 40 Gbps and 100 Gbps.
Fig. 3. Ethernet Physical Layers Devices
4. ETHERNET SUB-LAYERS
Reconciliation Sub layer (RS) and Media
Independent Interface:
The Media Independent Interface (Clause 81)
provides a logical interconnection between the
MAC sub layer and Physical Layer entities
(PHY). The Media Independent Interface is not
intended to be physically instantiated; rather it
can logically connect layers within a device.
The XLGMII supports 40 Gbps and CGMII
supports 100 Gbps operation through its 64-
bit-wide transmit and receive data paths. The
Reconciliation Sub layer (RS) provides a
mapping between the signals provided at the
3. Krunal Kapadiya / International Journal of Engineering Research and Applications
(IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 3, May-Jun 2013, pp.562-566
564 | P a g e
Media Independent Interface (XLGMII and
CGMII) and the MAC/PLS service definition.
While XLGMII and CGMII are optional
interfaces, they are used extensively in this
standard as a basis for functional specification
and provide a common service interface for the
physical coding sub-layers defined in Clause
82.
Physical Coding Sub-layer (PCS):
The terms 40GBASE-R and 100GBASE-R
refer to a specific family of Physical Layer
implementations based upon the 64B/66B data
coding method specified in Clause 82 and the
PMA specification defined in Clause 83. The
40GBASE-R and 100GBASE-R PCSs perform
encoding (decoding) of data from (to) the
XLGMII/CGMII to 64B/66B code blocks,
distribute the data to multiple lanes, and
transfer the encoded data to the PMA.
Forward Error Correction (FEC) sub-layer:
The Forward Error Correction sub-layer is an
optional sub-layer for 40GBASE-R and
100GBASE-R copper and backplane PHYs.
The FEC sub-layer can be placed in between
the PCS and PMA sub-layers or between two
PMA sub-layers, is instantiated for each PCS
lane, and operates autonomously on a per PCS
lane basis.
The FEC sub-layer is specified in Clause 74.
Physical Medium Attachment (PMA) sub-
layer:
The PMA provides a medium-independent
means for the PCS to support the use of a
range of physical media. The 40GBASE-R and
100GBASE-R PMAs perform the mapping of
transmit and receive data streams between the
PCS and PMA via the PMA service interface,
and the mapping and multiplexing of transmit
and receive data streams between the PMA and
PMD via the PMD service interface. In
addition, the PMAs perform retiming of the
received data stream when appropriate,
optionally provide data loopback at the PMA
or PMD service interface, and optionally
provide test pattern generation and checking.
The 40GBASE-R and 100GBASE-R PMAs
are specified in Clause 83.
Physical Medium Dependent (PMD) sub-layer:
The Physical Medium Dependent sub-layer is
responsible for interfacing to the transmission
medium. The PMD is located just above the
Medium Dependent Interface (MDI). The
MDI, logically subsumed within each PMD
sub-clause, is the actual medium attachment
for the various supported media.
The 40GBASE-R and 100GBASE-R PMDs
and their corresponding media are specified in
Clause 84 through Clause 88.
Auto-Negotiation:
Auto-Negotiation provides a linked device
with the capability to detect the abilities
(modes of operation) supported by the device
at the other end of the link, determine common
abilities, and configure for joint operation.
Clause 73 Auto-Negotiation is used by the 40
Gbps backplane PHY (40GBASE-KR4, see
Clause 84) and the 40 Gbps and 100 Gbps
copper PHYs (40GBASE-CR4 and
100GBASE-CR10, see Clause 85).
Management interface (MDIO/MDC):
The optional MDIO/MDC management
interface (Clause 45) provides an
interconnection between MDIO Manageable
Devices (MMDs) and Station Management
(STA) entities.
Management:
Managed objects, attributes, and actions are
defined for all 40 Gigabit and 100 Gigabit
Ethernet components. Clause 30 consolidates
all IEEE 802.3 management specifications so
that 10/100/1000 Mbps, 10 Gbps, 40 Gbps, and
100 Gbps agents can be managed by existing
network management stations with little or no
modification to the agent code.
5. ARCHITECTURE
5.1. Ethernet 40 Gbps
XLGMII (intra-chip)
Logical, data/control, clock, no electrical
specification
40GBASE-R PCS
64B/66B encoding
Lane distribution and alignment
Fig. 4. Ethernet 40 Gbps Architecture
4. Krunal Kapadiya / International Journal of Engineering Research and Applications
(IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 3, May-Jun 2013, pp.562-566
565 | P a g e
XLAUI (chip-to-chip or chip-to-module)
10.3125 GBaud electrical interface
4 lanes
Physical instantiation of PMA service
interface
FEC service interface
Abstract
PMA service interface
Abstract, can be physically instantiated as
XLAUI electrical interface
XLPPI (chip-to-module)
10.3125 GBaud electrical interface
4 lanes, optional for use with non retimed
40GBASE-SR4/LR4 optical PHY modules
PMD service interface
Logical
5.2. Ethernet 100 Gbps
Fig. 5. Ethernet 100 Gbps Architecture
CGMII(intra-chip)
Logical, data/control, clock, no electrical
specification
100GBASE-R PCS
64B/66B encoding
Lane distribution and alignment
CAUI(chip-to-chip or chip-to-module)
10.3125 GBaud electrical interface
10 lanes
Physical instantiation of PMA service
interface
FEC service interface
Abstract
PMA service interface
Abstract, can be physically instantiated as
CAUI electrical interface
CPPI (chip-to-module)
10.3125 GBaud electrical interface
10 lanes, for use with non retimed
100GBASE-SR10 optical modules
PMD service interface
Logical
100 GbE architecture diagram with CPPI
CPPI3
is physical instantiation of PMD
service interface for 100GBASE-SR10
PHYs
Fig. 6. Ethernet 100 Gbps with CPPI
Optional Compatibility Interfaces:
40 Gigabit Media Independent Interface
(XLGMII): The XLGMII is designed to
connect a 40 Gbps capable MAC to a 40 Gbps
PHY. While conformance with implementation
of this interface is not necessary to ensure
communication, it allows flexibility in
intermixing PHYs and DTEs at 40 Gbps
speeds. The XLGMII is a logical
interconnection intended for use as an intra-
chip interface.
40 Gigabit Attachment Unit Interface
(XLAUI): The XLAUI is a physical
instantiation of the PMA service interface to
extend the connection between 40 Gbps
capable PMAs. While conformance with
implementation of this interface is not
necessary to ensure communication, it is
recommended, since it allows maximum
flexibility in intermixing PHYs and DTEs at
5. Krunal Kapadiya / International Journal of Engineering Research and Applications
(IJERA) ISSN: 2248-9622 www.ijera.com
Vol. 3, Issue 3, May-Jun 2013, pp.562-566
566 | P a g e
40 Gbps speeds. The XLAUI is intended for
use as a chip-to-chip or a chip-to-module
interface.
40 Gigabit Parallel Physical Interface (XLPPI):
The XLPPI is provided as a physical
instantiation of the PMD service interface for
40GBASE-SR4 and 40GBASE-LR4 PMDs.
The XLPPI has four lanes. While conformance
with implementation of this interface is not
necessary to ensure communication, it allows
flexibility in connecting the 40GBASE-SR4 or
40GBASE-LR4 PMDs. The XLPPI is intended
for use as a chip-to-module interface. No
mechanical connector is specified for use with
the XLPPI. The XLPPI is optional.
100 Gigabit Media Independent Interface
(CGMII): The CGMII is designed to connect a
100 Gbps capable MAC to a 100 Gbps PHY.
While conformance with implementation of
this interface is not necessary to ensure
communication, it allows flexibility in
intermixing PHYs and DTEs at 100 Gbps
speeds. The CGMII is a logical interconnection
intended for use as an intra-chip interface.
100 Gigabit Attachment Unit Interface
(CAUI): The CAUI is a physical instantiation
of the PMA service interface to extend the
connection between 100 Gbps capable PMAs.
While conformance with implementation of
this interface is not necessary to ensure
communication, it is recommended, since it
allows maximum flexibility in intermixing
PHYs and DTEs at 100 Gbps speeds. The
CAUI is intended for use as a chip-to-chip or a
chip-to-module interface.
100 Gigabit Parallel Physical Interface (CPPI):
The CPPI is provided as a physical
instantiation of the PMD service interface for
100GBASE-SR10 PMDs. The CPPI has ten
lanes. While conformance with
implementation of this interface is not
necessary to ensure communication, it allows
flexibility in connecting the 100GBASE-SR10
PMDs. The CPPI is intended for use as a chip-
to-module interface.
6. ELECTRICAL INTERFACES
Illustration of Inter-sub-layer interface and
Medium dependent interface.
XLAUI/CAUI and MDI have different
electrical characteristics.
Fig. 7. Electrical Interfaces of Ethernet
6.1. Ethernet 40 Gbps
Fig. 8. Implementation of Ethernet 40 Gbps
6.2. Ethernet 100 Gbps
Fig. 9. Implementation of Ethernet 100 Gbps
7. FUTURE STANDARDS
IEEE P802.3bj 100 Gbps Backplane and
Copper Cable Task Force.
IEEE P802.3bg task force is developing a
standard for 40 Gbps serial single mode fiber
PMD.
IEEE 802.3 Next Gen. 100 Gbps Optical
Ethernet.
8. CONCLUSION
40 Gbps and 100 Gbps Ethernet use a common
architecture. It addresses the needs of computing,
network aggregation and core networking
applications. The architecture is flexible and
scalable to adapt current & future needs. It leverages
existing 10 Gbps technology where possible.
9. ACKNOWLEDGMENTS
I am grateful to Mr. Umesh Patel (Director
– ASIC) and Mr. Manish Desai (Sr. Member
Technical Staff) of Sibridge Technologies,
Ahmedabad for providing guidelines and
encouragement. I feel motivated and encouraged
every time I attend their meeting.
REFERENCES
[1] IEEE Standard 802.3ba-2010, June 2010.
[2] IEEE Standard 802.3-2008, December
2008.
[3] Ilango Ganga, IEEE 802.3ba 40 and 100
Gigabit Ethernet Architecture, October
2010.