WiMAX
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This document presents an overview of WiMAX (IEEE 802.16) technology. It describes WiMAX as a wireless broadband technology that provides high-speed Internet access over long distances, comparing it to Wi-Fi. The key components of a WiMAX system including the base station and receiver are outlined. The document also discusses the physical and MAC layers, mobility support, security functions, and provides comparisons to Wi-Fi.
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Analysis of wifi and wimax and wireless network coexistence
Wireless networks are very popular nowadays. Wireless Local Area Network (WLAN) that uses the IEEE 802.11 standard and WiMAX (Worldwide Interoperability for Microwave Access) that uses the IEEE802.16 standard are networks that we want to explore. WiMAX has been developed over 10 years, but it is still unknown by most people. However, compared with WLAN, it has many advantages in transmission speed and coverage area. This paper will introduce these two technologies and make comparisons between WiMAX and WiFi. In addition, wireless network coexistence of WLAN and WiMAX will be explored through simulation. Lastly we want to discuss the future of WiMAX in relation to WiFi.
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WiMAX
1. WiMAX is a wireless technology that provides broadband internet access over wide areas. It uses radio waves to transmit data and can provide connectivity up to 50km from transmission towers.
2. WiMAX offers high-speed data transmission rates and supports both fixed and mobile internet access. It is designed to be interoperable on a global scale.
3. Some applications of WiMAX include providing home/residential broadband access, connectivity for small/medium businesses, and as backhaul networks to connect cellular base stations to the core network.
Interoperabilty And Conformance Testing
The document discusses plug tests, which are events where technology consortiums bring vendors together to test interoperability and conformance of standards. It describes Nortel's participation in WiMAX Forum plug tests in France and Taiwan, where they achieved interoperability with numerous device and chipset vendors for technologies like MIMO and different channel bandwidths. The plug tests followed a common format of involving implementations, experts, test cases, and rules to facilitate comprehensive testing.
Brief introduction of wi max technology
WiMAX is a wireless technology that provides broadband access over long distances. It allows users to access the internet without wires by connecting to a WiMAX base station. Key points:
- WiMAX provides high-speed internet access to homes and businesses without wires using wireless technology outlined in IEEE 802.16 standards.
- It can be used for various applications including connecting Wi-Fi hotspots, providing broadband access, and providing mobile data for 4G services.
- WiMAX uses licensed or unlicensed spectrum and has an architecture with subscriber stations, access networks, and connectivity networks interconnected by standardized interfaces.
- It aims to eliminate constraints of Wi-Fi by providing greater mobility over longer distances and
Wi max technology
This document provides an overview of a technical seminar on WiMAX technology. It discusses the contents which will be covered, including introductions, operating topologies, architecture, methodology, a SWOT analysis comparing 4G and WiMAX, wireless technologies, the WiMAX network architecture, and conclusions. It provides high-level information on key topics that will be discussed, such as the four primary WiMAX network topologies, the classification of wireless technologies, QualNet modeling methodology, benefits of WiMAX including replacing copper wire networks, and references that will be cited.
Wimax
WiMAX (Worldwide Interoperability for Microwave Access) is a wireless technology that provides broadband connections over long distances. It can deliver last mile wireless broadband as an alternative to cable and DSL. WiMAX uses OFDMA technology which utilizes multiple subcarriers to transmit wide bandwidth signals efficiently. It has further evolved through several IEEE 802.16 standards to support higher data rates and frequencies. WiMAX has a longer range than Wi-Fi, with expected speeds between 1-100 Mbps for fixed and mobile use. It is being deployed worldwide for various applications and paving the way for 5G networks in the future.
Wimax
The document discusses WiMAX (Worldwide Interoperability for Microwave Access), a wireless technology standard that provides broadband connectivity. Key points:
- WiMAX allows for delivery of last mile broadband as an alternative to wired options like cable and DSL over a range of up to 10km. It provides speeds of up to 40Mbps for fixed/portable use and 15Mbps for mobile use.
- The 802.16 standard and its variants define WiMAX specifications for different applications - 802.16a for line-of-sight, 802.16e for mobility. The WiMAX Forum promotes compatibility between vendor equipment.
- While WiMAX can provide high speeds over long ranges
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Wireless networks are very popular nowadays. Wireless Local Area Network (WLAN) that uses the IEEE 802.11 standard and WiMAX (Worldwide Interoperability for Microwave Access) that uses the IEEE802.16 standard are networks that we want to explore. WiMAX has been developed over 10 years, but it is still unknown by most people. However, compared with WLAN, it has many advantages in transmission speed and coverage area. This paper will introduce these two technologies and make comparisons between WiMAX and WiFi. In addition, wireless network coexistence of WLAN and WiMAX will be explored through simulation. Lastly we want to discuss the future of WiMAX in relation to WiFi.
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WiMAX
1. WiMAX is a wireless technology that provides broadband internet access over wide areas. It uses radio waves to transmit data and can provide connectivity up to 50km from transmission towers.
2. WiMAX offers high-speed data transmission rates and supports both fixed and mobile internet access. It is designed to be interoperable on a global scale.
3. Some applications of WiMAX include providing home/residential broadband access, connectivity for small/medium businesses, and as backhaul networks to connect cellular base stations to the core network.
Interoperabilty And Conformance Testing
The document discusses plug tests, which are events where technology consortiums bring vendors together to test interoperability and conformance of standards. It describes Nortel's participation in WiMAX Forum plug tests in France and Taiwan, where they achieved interoperability with numerous device and chipset vendors for technologies like MIMO and different channel bandwidths. The plug tests followed a common format of involving implementations, experts, test cases, and rules to facilitate comprehensive testing.
Brief introduction of wi max technology
WiMAX is a wireless technology that provides broadband access over long distances. It allows users to access the internet without wires by connecting to a WiMAX base station. Key points:
- WiMAX provides high-speed internet access to homes and businesses without wires using wireless technology outlined in IEEE 802.16 standards.
- It can be used for various applications including connecting Wi-Fi hotspots, providing broadband access, and providing mobile data for 4G services.
- WiMAX uses licensed or unlicensed spectrum and has an architecture with subscriber stations, access networks, and connectivity networks interconnected by standardized interfaces.
- It aims to eliminate constraints of Wi-Fi by providing greater mobility over longer distances and
Wi max technology
This document provides an overview of a technical seminar on WiMAX technology. It discusses the contents which will be covered, including introductions, operating topologies, architecture, methodology, a SWOT analysis comparing 4G and WiMAX, wireless technologies, the WiMAX network architecture, and conclusions. It provides high-level information on key topics that will be discussed, such as the four primary WiMAX network topologies, the classification of wireless technologies, QualNet modeling methodology, benefits of WiMAX including replacing copper wire networks, and references that will be cited.
Wimax
WiMAX (Worldwide Interoperability for Microwave Access) is a wireless technology that provides broadband connections over long distances. It can deliver last mile wireless broadband as an alternative to cable and DSL. WiMAX uses OFDMA technology which utilizes multiple subcarriers to transmit wide bandwidth signals efficiently. It has further evolved through several IEEE 802.16 standards to support higher data rates and frequencies. WiMAX has a longer range than Wi-Fi, with expected speeds between 1-100 Mbps for fixed and mobile use. It is being deployed worldwide for various applications and paving the way for 5G networks in the future.
Wimax
The document discusses WiMAX (Worldwide Interoperability for Microwave Access), a wireless technology standard that provides broadband connectivity. Key points:
- WiMAX allows for delivery of last mile broadband as an alternative to wired options like cable and DSL over a range of up to 10km. It provides speeds of up to 40Mbps for fixed/portable use and 15Mbps for mobile use.
- The 802.16 standard and its variants define WiMAX specifications for different applications - 802.16a for line-of-sight, 802.16e for mobility. The WiMAX Forum promotes compatibility between vendor equipment.
- While WiMAX can provide high speeds over long ranges
Wimax / ieee 802.16
The WiMAX MAC encapsulates data packets from higher layers through various sublayers. It adds headers at each sublayer for functions like security, bandwidth allocation, and multiple access control before the data is encoded and transmitted through the physical layer using modulation schemes like OFDM. This ensures efficient transmission of data over the wireless medium according to QoS priorities and security requirements.
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WIMAX is a wireless technology that provides broadband connectivity over long distances in a variety of ways. It uses towers to transmit high-speed internet access to receivers within a range of up to 50 km. WIMAX has several advantages over existing wireless technologies like WiFi and 3G, such as higher speeds, broader coverage areas, and lower infrastructure costs. While WIMAX adoption is still in early stages, it promises to deliver wireless broadband to more users at lower prices than current options.
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This document discusses wireless technology and WiMAX. It begins with an introduction to wireless technology and its characteristics like mobility, reachability, maintainability and simplicity. It then discusses different wireless network topologies and technologies classified by range, including WWAN, WPAN, WLAN and WMAN. The document introduces WiMAX as a wireless broadband technology based on the IEEE 802.16 standard that supports broadband speeds up to 75 Mbps within a range of up to 50 km. It compares WiMAX to other wireless technologies and discusses WiMAX's vision of providing broadband everywhere as well as its benefits like replacing copper wire networks and providing high-speed connectivity.
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WiMAX
Visit www.seminarlinks.blogspot.com to Download
WiMAX is a digital wireless data communication system that can deliver high-speed broadband services up to a large distance of 50KMs.The name WiMAX was created by WiMAX forum, the consortium promoting this standard. The term WiMAX is derived from the phrase Worldwide Interoperability for Microwave Access.
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Slides by :
Ehsan Taghipour
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This presentation introduces WiMax, a wireless technology that provides broadband internet access over long distances at low cost. WiMax uses towers and receivers to connect users within a few miles to the internet via microwave signals. It has advantages over wired connections like quick installation and flexibility in pricing and bandwidth. While WiMax can support high speeds over large areas, it cannot do both simultaneously. In the future, WiMax is expected to provide affordable, widespread broadband access and become the dominant wireless networking technology within 5 years. It is compared to other wireless technologies like WiFi, 3G, and broadband, with each having their own advantages and disadvantages in terms of speed, range, and cost.
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WiMAX is an emerging wireless broadband technology that aims to connect the next 5 billion people globally. It uses adaptive modulation and orthogonal frequency-division multiplexing (OFDM) to provide broadband connectivity over both line-of-sight and non-line-of-sight environments. WiMAX faces challenges around flexibility, security, and efficiency that it addresses through features like terminal authentication, user authentication, data encryption, and being a more spectrum-efficient solution compared to other wireless technologies. If successful, WiMAX could bring broadband access to underserved rural and developing areas and make portable internet access a reality.
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Wi-Fi allows wireless networking connectivity within homes and offices without wires, using radio signals to connect devices within 100 feet of each other. WiMAX provides broader wireless coverage over distances of up to 50km to serve as a wireless alternative to wired broadband. While Wi-Fi is best for small indoor coverage areas, WiMAX is designed for larger outdoor metropolitan coverage as a wireless option for last mile internet access to homes and businesses. Both technologies will continue to evolve and work together, with WiMAX complementing Wi-Fi for broader range wireless connectivity and Intel integrating their capabilities into single chips.
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This document discusses WiMAX (Worldwide Interoperability for Microwave Access), which is a wireless technology that provides broadband connections over long distances. WiMAX uses towers similar to cell towers to provide internet access over an area of up to 50 km without needing cables. It offers faster, more affordable and more widespread broadband access compared to options like DSL or cable. WiMAX connections are beginning to be provided in Pakistan and will allow for portable broadband access over large areas.
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Now-a-days there is high demand for broadband mobile services. Traditional high-speed
broadband solutions depend on wired technologies namely digital subscriber line (DSL). Wifi
and Wimax are useful in providing any type of connectivity such as the fixed or portable or
nomadic connectivity without the requirement of LoS (Line of Sight) of the base station. Mobile
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where wired technology and also terminal mobility cannot be provided. The IEEE Wi-Fi and
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WiMAX stands for Worldwide Interoperability for Microwave Access which is also called as IEEE 802.16, the WiMAX technology is basically a wireless broadband communications technology, and it is used to provide higher data rate with increased coverage area. It means that it is based on IEEE 802.16 standard, which provides high speed data over a wide area. This technology can operate Non LOS non line of site . WiMAX is considered as a technology for point to multipoint wireless networking. In this paper it cover about WiMAX, WiMAX feature, it's Characteristics and Application and their architecture of WiMAX. Khushboo Kumari ""WiMAX Features, Characteristics and Application in Wireless Technology Computing"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-2 , February 2020,
URL: https://www.ijtsrd.com/papers/ijtsrd30204.pdf
Paper Url : https://www.ijtsrd.com/computer-science/computer-network/30204/wimax-features-characteristics-and-application-in-wireless-technology-computing/khushboo-kumari
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WiMAX
Visit www.seminarlinks.blogspot.com to Download
WiMAX is a digital wireless data communication system that can deliver high-speed broadband services up to a large distance of 50KMs.The name WiMAX was created by WiMAX forum, the consortium promoting this standard. The term WiMAX is derived from the phrase Worldwide Interoperability for Microwave Access.
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This presentation introduces WiMax, a wireless technology that provides broadband internet access over long distances at low cost. WiMax uses towers and receivers to connect users within a few miles to the internet via microwave signals. It has advantages over wired connections like quick installation and flexibility in pricing and bandwidth. While WiMax can support high speeds over large areas, it cannot do both simultaneously. In the future, WiMax is expected to provide affordable, widespread broadband access and become the dominant wireless networking technology within 5 years. It is compared to other wireless technologies like WiFi, 3G, and broadband, with each having their own advantages and disadvantages in terms of speed, range, and cost.
seminar report on wimax
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WiMAX technology allows for wireless broadband connectivity over long distances in a more economical way than other wireless technologies. It works by using towers to transmit high-speed network signals up to 30 miles to both fixed and mobile receivers. Key benefits include serving many users at once from a single tower, faster deployment than wired networks, large coverage areas, standardization allowing interoperability between equipment, and providing high-speed broadband access at lower costs than other options. However, it also has drawbacks like needing line-of-sight for long-distance connections, susceptibility to weather interference, and high installation costs for equipment.
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Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for communication. It was invented by Professor Harald Haas and is a faster, more secure, and cheaper alternative to Wi-Fi. Li-Fi uses visible light communication and LED light bulbs to transmit data, allowing for much higher speeds than Wi-Fi. Some challenges remain around light not passing through objects and interference from other light sources, but Li-Fi shows promise for applications like traffic lights, hazardous environments, and undersea use where Wi-Fi cannot reach.
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This document discusses WiMAX (Worldwide Interoperability for Microwave Access), which is a wireless technology that provides broadband connections over long distances. WiMAX uses towers similar to cell towers to provide internet access over an area of up to 50 km without needing cables. It offers faster, more affordable and more widespread broadband access compared to options like DSL or cable. WiMAX connections are beginning to be provided in Pakistan and will allow for portable broadband access over large areas.
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The presentation contains slides regarding various functions, components & uses of Wi-MAX. It compares the advantages of Wi-MAX over other technologies.
Vlc technical seminar report
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EMERGING BROADBAND WIRELESS TECHNOLOGIES: WIFI AND WIMAX
Now-a-days there is high demand for broadband mobile services. Traditional high-speed
broadband solutions depend on wired technologies namely digital subscriber line (DSL). Wifi
and Wimax are useful in providing any type of connectivity such as the fixed or portable or
nomadic connectivity without the requirement of LoS (Line of Sight) of the base station. Mobile
Broadband Wireless Network (MBWN) is a flexible and economical solution for remote areas
where wired technology and also terminal mobility cannot be provided. The IEEE Wi-Fi and
Wi-Max/802.16 are the most promising technologies for broadband wireless metropolitan area networks (WMANs) and these are capable of providing high throughput even on long distances with varied QoS. These technologies ensure a wireless network that enables high speed Internet access to residential, small and medium business customers, as well as Internet access for WiFi hot spots and cellular base stations. These offer support to both point-to-multipoint (P2MP) and multipoint-to-multipoint (mesh) nodes and offers high speed data (voice, video) service to the customers. In this paper, we study the issues related to, benefits and deployment of these technologies.
WiMAX Features, Characteristics and Application in Wireless Technology Computing
WiMAX stands for Worldwide Interoperability for Microwave Access which is also called as IEEE 802.16, the WiMAX technology is basically a wireless broadband communications technology, and it is used to provide higher data rate with increased coverage area. It means that it is based on IEEE 802.16 standard, which provides high speed data over a wide area. This technology can operate Non LOS non line of site . WiMAX is considered as a technology for point to multipoint wireless networking. In this paper it cover about WiMAX, WiMAX feature, it's Characteristics and Application and their architecture of WiMAX. Khushboo Kumari ""WiMAX Features, Characteristics and Application in Wireless Technology Computing"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-2 , February 2020,
URL: https://www.ijtsrd.com/papers/ijtsrd30204.pdf
Paper Url : https://www.ijtsrd.com/computer-science/computer-network/30204/wimax-features-characteristics-and-application-in-wireless-technology-computing/khushboo-kumari
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A countermeasure for flooding
Worldwide Interoperability for Microwave Access (WiMAX) is a new communication technology that
conduits the fissure between fixed and mobile access and offers the same Quality of Service (QoS) to both
types of users. Generally, WiMAX is more vulnerable to the inside and outside attacks due to the absence of
any clear line of defense. The Mobile Subscriber Stations (MSSs) selected to transfer the packets to the
Base Station (BS) are vulnerable to Denial of Service (DoS) attacks like flooding. Recent research has
discovered that DoS attacks can easily be launched by injecting malevolent management frames into the
WiMAX network based on the Privacy and Key Management- ReSPonse (PKM-RSP) and Automatic Repeat
ReQuest (ARQ)-Reset messages. In this paper, an algorithm is proposed to mitigate the flooding attacks
and enhance the security level in the network.
5G WIRELESS TECHNOLOGY
5G is the next generation of wireless technology that will offer higher speeds, lower latency, and greater capacity than current 4G LTE networks. It evolved from 1G to 2G to 3G to 4G networks. 5G uses technologies like ultra-wideband, smart antennas, and CDMA to provide data bandwidth of up to 1 Gbps, make connectivity globally accessible at low cost, and support applications involving wearable devices, AI, media streaming, and more for a user-centric experience.
LiFi technology (visible light communication )
This document discusses LiFi technology, which uses visible light communication to transmit data wirelessly. It provides a brief history of LiFi, including early experiments in the 1880s and demonstrations of increasing data transmission speeds from 2003-2011. The document explains how LiFi works using LED lights to transmit digital 1s and 0s. It compares LiFi to WiFi, noting LiFi's higher speeds, lower costs, and ability to transmit through water. Potential applications of LiFi are identified, along with current research areas and standardization efforts. Limitations around line-of-sight transmission and interference from other light sources are also outlined.
5g-technology-ppt-170908173630.pdf
The document discusses the evolution of wireless technologies from 1G to 5G. It describes the key features of 5G including expected speeds up to 1 Gbps, lower latency, and the ability to connect more devices simultaneously. The proposed 5G architecture is presented involving open wireless, mobile IP, and open transport protocols. Potential 5G applications that could take advantage of the increased speeds and bandwidth are also outlined.
5g-technology-ppt-170908173630.pdf
The document discusses the evolution of wireless technologies from 1G to 5G. It describes the key features of 5G including expected speeds up to 1 Gbps, lower latency, and the ability to connect more devices simultaneously. The proposed 5G architecture is presented involving open wireless, mobile IP, and open transport protocols. Potential 5G applications that could take advantage of the increased speeds and bandwidth are also outlined.
5G technology-ppt
5G technology will provide significantly faster wireless speeds up to 1 Gbps, lower latency, and better support for wireless connectivity between devices. It evolved from 1G to 5G networks with increasing speeds and capabilities. 5G uses new hardware like ultra wideband networks and smart antennas and software like a unified global standard and open transport protocol. Key benefits of 5G include high data bandwidth, global accessibility, and support for applications like wearable devices, media streaming, and virtual reality.
WIMAX.pdf
WiMAX is a telecommunications protocol that provides fixed and mobile broadband internet access. It aims to build metropolitan area networks with high bit rates and global range. WiMAX uses technologies like orthogonal frequency-division multiplexing (OFDM) and supports features such as multipath, broadband access, high data rates, reliability, and time-division duplexing (TDD) and frequency-division duplexing (FDD). Potential applications of WiMAX include residential internet access, business connectivity, cellular backhaul, and public WiFi hotspots.
5g-technology-ppt-170908173630 (1).pptx
This document summarizes 5G technology, comparing it to previous generations from 1G to 4G. 5G is expected to offer speeds up to 1 Gbps, making it 10 times faster than 4G. It will have an open wireless architecture based on new standards for the physical, data link, network, and transport layers. 5G hardware will use technologies like software-defined radio, ultra-wideband networks, and smart antennas to allow for high bandwidth, low latency connections globally. Applications of 5G include wearable devices, media streaming, and virtual/augmented reality.
Wireless for Stationary Applications
Many more useful measurements could be taken in discrete manufacturing and process plant applications without the expense and labor related to wire and cables for some hard-to-reach applications. Wiring in manufacturing or process-plant settings, with the accompanying complex supporting infrastructure and labor, drops from high ceilings or trenching can add 10-fold or more to installation costs. It doesn’t have to be that way. Industrial wireless technologies can provide cost-effective reliable communications. Key considerations and application examples will be discussed by Dan Capano, owner and president of Diversified Technical Services Inc. Mark T. Hoske, content manager and editor with Control Engineering, will explain wireless trends based on Control Engineering research and will moderate the webcast.
Wi max
Wireless communication systems provide mobility and connectivity anywhere through high data rates, quality of service, and extended ranges of up to 50km. WiMAX is a wireless technology that can deliver broadband access through fixed and mobile networks in an economical way. It transforms mobile broadband by supporting up to 75Mbps for devices like laptops. Key capabilities include centralized coordination, high-speed IP services, quality of service, and compatibility between equipment. WiMAX uses OFDM to optimize delivery of services and enables applications like voice, video, and Internet access over wide metropolitan areas.
Wi-Fi and Wi-max
Wi-Fi and WiMAX are wireless networking technologies that use radio waves and have standards specified by IEEE. Wi-Fi provides short range connectivity using technologies like 802.11b, 802.11a, 802.11g and 802.11n. WiMAX is a wireless broadband technology that provides longer range connectivity using standards like 802.16 and 802.16e. Both have advantages like mobility and convenience but Wi-Fi has limitations in range and speed while WiMAX installations have higher costs.
5gwirelesstechnology-121010092151-phpapp02 (1).pdf
This document discusses the evolution of wireless technologies from 1G to 5G. It describes the key concepts of 5G including its expected speed of 1 Gbps, lower latency than 4G, and ability to connect many devices simultaneously. The document outlines the proposed 5G architecture including its use of UWB networks, smart antennas, CDMA, and software-defined radios. It lists some potential applications of 5G such as wearable devices and pervasive networks, and concludes that 5G will be more user-centric compared to previous generations.
012327336 aq
This document discusses WiMAX technology and its applications. It begins by defining WiMAX and comparing it to other wireless technologies such as WiFi, DSL, and cable. It then addresses whether WiMAX will replace these existing broadband technologies. While WiMAX provides broadband wireless access not available in all areas, DSL and cable will likely continue to be deployed where infrastructure allows. The document goes on to describe the IEEE 802.16 standard that defines WiMAX and how it has evolved. It also explains WiMAX system models including point-to-point, point-to-multipoint, and mesh topologies. Finally, it covers WiMAX's use as a metro-access option and details its physical layer technology which is based
Module 15 (hacking wireless networks)
Wireless networks are accessible to anyone within the router’s transmission radius. This makes them vulnerable to attacks. Hotspots are available in public places such as airports, restaurants, parks, etc.
In this module, we will introduce you to common techniques used to exploit weaknesses in wireless network security implementations. We will also look at some of the countermeasures you can put in place to protect against such attacks.
Wi max fixed vs. mobile
This document provides an overview of WiMAX technology, including the differences between fixed and mobile WiMAX. It discusses the IEEE 802.16 standards for fixed (802.16d) and mobile (802.16e) WiMAX. Fixed WiMAX uses OFDM and operates between 2-11 GHz for fixed wireless connections, while mobile WiMAX uses scalable OFDMA and enables handoffs between base stations for mobility below 100 km/h. Mobile WiMAX also introduces improved quality of service for real-time applications like voice. The document outlines the physical layer specifications and protocols of each standard.
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WiMAX
- 1. WiMAX - IEEE 802.16 Présenté par: • ABDELMALEK Ali • NOUR Boubakr Sous la direction de: • Dr. Sofiane BOUKLI HACENE Ministère de l’Enseignement Supérieur et de la Recherche Scientifique Université Djillali Liabes de Sidi Bel Abbes Faculté: Technologie Département: Informatique Master 2: Réseaux, Systèmes et Sécurité de l’information Module: Technologie des réseaux sans fil 2015/2016
- 2. Wireless Introduction Wireless: transmitting signals using radio waves as the medium instead of wires. Wireless Communications’ Characteristics: November 22, 2015 Djillali Liabes University 2/16 Mobility Reachability Simplicity Maintainability Roaming Services New Services
- 3. Issues with Wireless Networks Quality of Service (QoS) Security Risk Reachable Range November 22, 2015 Djillali Liabes University 3/16
- 4. Do we need a new technology ?
- 5. Terminologies Wireless Broadband Access (WBA): high-speed connection over the air. Wi-Fi: Wireless Fidelity November 22, 2015 Djillali Liabes University 5/16
- 6. What is WiMAX ? Acronym for Worldwide Interoperability for Microwave Access. Formed in April 2001, original 10-66 GHz, IEEE 802.16 specifications. Based on Wireless MAN technology. A wireless technology optimized for the delivery of IP centric services over a wide area. A scalable wireless platform for constructing alternative and complementary broadband networks. November 22, 2015 Djillali Liabes University 6/16
- 7. Why WiMAX ? Supports very high bandwidth solutions. Helps service providers to increase customer demands. Provide wide area coverage and quality of service capabilities. IP-Based solution, can integrated into 3G, Wireless and Wireline networks. Anytime, anywhere broadband access solution. November 22, 2015 Djillali Liabes University 7/16
- 8. WiMAX & Wi-Fi Comparison Feature WiMAX (802.16a) Wi-Fi (802.11b) Wi-Fi (802.11a/g) Primary App BWA Wireless LAN Wireless LAN Frequency Band 2 – 11 Ghz (licence) 2.4 Ghz 2.4, 5 Ghz Duplex Full Half Half Radio Tech OFDM (256 channels) Direct Sequence, Spread Spectrum OFDM (64 channels) Bandwidth <=5 bps/Hz <=0.44 bps/Hz <=2.7 bps/Hz Encryption 3DES, AES RC4 (optional) RC4 (optional) Mobility Mobile WiMax In development In development Access Protocol Request/Grant CSMA/CA CSMA/CA November 22, 2015 Djillali Liabes University 8/16
- 9. Building Blocks A WiMAX system consists of two major parts: WiMAX Base Station: Indoor electronics and a WiMAX tower. Uses the MAC Layer. WiMAX Receiver: Separate antenna or stand-alone box. Similar to access to wireless access point, but the coverage is greater. November 22, 2015 Djillali Liabes University 9/16
- 10. Reference Network Model November 22, 2015 Djillali Liabes University 10/16
- 11. Physical Layer Supports a variety of modulation and coding schemes. Modulation: OFDM OFDMA Multiplexing: FDD TDD November 22, 2015 Djillali Liabes University 11/16
- 12. MAC Layer Point-to-multipoint broadband wireless access applications. Transmission: MSDUs to MPDUs Support of QoS Broadcast and Multicast support. High-speed handover and mobility management primitives. Five service classes: unsolicited grant service (UGS), real-time polling service (rtPS), non-real-time polling service (nrtPS), best effort (BE), and Extended real- time variable rate (ERT-VR) service. November 22, 2015 Djillali Liabes University 12/16
- 13. MAC Layer November 22, 2015 Djillali Liabes University 13/16
- 14. Mobility Support Nomadic: fixed subscriber station, reconnect from a different point of attachment. Portable: access to portable device, best-effort handover. Simple Mobility: subscriber moves at speed +60Kmps. Full Mobility: up to 120Kmph November 22, 2015 Djillali Liabes University 14/16
- 15. Security Functions Support for Privacy: data encryotion using 3DES, AES Device/User Authentication: authenticating subscriber stations and users to prevent unauthorized use. Flexible Key-Management Protocol: The Privacy and Key Management Protocol Version 2 (PKMv2) Protection of Control Messages Support for Fast Handover November 22, 2015 Djillali Liabes University 15/16
- 16. Thank You….