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This document investigates the performance of multi-carrier code division multiple access (MC-CDMA) techniques. It compares the performance of conventional MC-CDMA, orthogonal wavelet packet based MC-CDMA (WP-MC-CDMA), and Huang Hilbert Transformation (HHT) based MC-CDMA in terms of bit error rate, throughput, and modulation techniques. WP-MC-CDMA and HHT based MC-CDMA are shown to outperform conventional MC-CDMA by mitigating interference and channel fading effects. HHT based MC-CDMA is the most spectrally efficient and provides high data rates due to its use of instantaneous channel state information. Numerical and simulation results are presented

Channel Capacity Maximization using NQHN Approach at Heterogeneous Network

In present scenario, the high speed data transmission services has pushed limits for wireless communication network capacity, at same time multimedia transmission in real-time needs provision of QoS, therefore the network capacity and small cell coverage has comes with lots of challenges. Improving the channel capacity and coverage area within the available bandwidth is necessary to provide better QoS to users, and improved channel capacity for the FCUs and MCUs in network. In this paper, we are proposing an NQHN approach that incorporate with efficient power allocation, improving the channel capacity by optimized traffic scheduling process in a small cell HetNets scenario. This work efficiently handle the interference with maintaining the user QoS and the implemented power controller uses HeNB power as per the real time based approach for macro-cell and femto-cell. Moreover, we consider the real traffic scenario to check the performance of our proposed approach with respect to existing algorithm.

Network efficiency enhancement by reactive channel state based allocation sch...

Now a day the large MIMO has considered as the efficient approach to improve the spectral and energy efficiency at WMN. However, the PC is a big issue that caused by reusing similar pilot sequence at cells, which also restrict the performance of massive MIMO network. Here, we give the alternative answer, where each of UEs required allotting a channel sequences before passing the payload data, so as to avoid the channel collision of inter-cell. Our proposed protocol will ready to determine the channel collisions in distributed and scalable process, however giving unique properties of the large MIMO channels. Here we have proposed a RCSA (Reactive channel state based allocation) scheme, which will very productively work with the RAP blockers at large network of MIMO. The position of time-frequency of RAP blocks is modified in the middle of the adjacent cells, because of this design decision the RAP defend from the hardest types of interference at inter-cell. Further, to validate the performance of our proposed scheme it will be compared with other existing technique.

論文-A Novel Cross-layer Mesh Router Placement Scheme for Wireless Mesh Networks

Harvey Chang

This document presents a novel Cross-layer Mesh Router Placement (CMRP) scheme for wireless mesh networks. CMRP aims to minimize network deployment cost while meeting user demands. It considers various factors such as antenna types, wireless link characteristics, MAC scheduling, routing, and equipment costs. CMRP encapsulates these cross-layer factors into three attributes - Local Coverage, Backbone Residual Capacity, and Deployment Cost. It uses these attributes to select mesh router locations that maximize coverage and backbone capacity while minimizing costs. Simulations show CMRP outperforms existing schemes in cost performance ratio and feasibility for planning wireless mesh networks.

PACKET SIZE OPTIMIZATION FOR ENERGY EFFICIENCY IN MULTIPATH FADING FOR WIRELE...

Recently, Wireless Body Area Network (WBAN) has drawn vast interest to many researchers due to its potential in healthcare and medical fields. In this paper, we propose the energy efficiency model of Time Diversity communication in Rician and Rayleigh fading channels emphasizing the optimal packet size. The optimal packet size to maximize energy efficiency is investigated for on-body and in-body channels. Four modulation techniques are considered including the recently proposed 16-ary Quadrature Amplitude Position Modulation (QAPM). In addition, the closed-form expression of the energy efficiency model in multipath fading is derived. Here, three evaluation metrics including the energy efficiency, the normalized throughput and the average end-to-end delay are adopted and compared to the existing 1-hop and Cooperative communications as well as our previously proposed 2-hop communication. The results show that our proposed Time Diversity communication scheme outperforms the existing ones in deep fading channel except for the average end-to-end delay

New adaptation method based on cross layer and TCP over protocols to improve ...

This document proposes a new adaptation method to improve quality of service in mobile ad hoc networks. The method uses a cross-layer approach combining modifications to the IEEE 802.11 MAC standard with a new version of TCP. It takes node mobility, signal strength, and routing protocols into account. Simulation results show the proposal achieves better TCP performance and throughput while improving energy efficiency compared to normal TCP, especially when using the OLSR routing protocol.

Energy Efficient Improved Bandwidth Video Streaming through Reliable Multipat...

badhusha mohideen

This document proposes a new protocol called Energy Efficient Improved Bandwidth Video Streaming through Reliable Multipath Propagation (EEIB-RMP) to improve bandwidth, energy efficiency, and reliability for video streaming in mobile ad hoc networks (MANETs). The protocol uses Scalable Video Coding (SVC) to improve bandwidth and two new algorithms: the Efficient Energy Path (EEP) Algorithm to find high-hopcount, low-delay energy efficient paths; and the Prioritized Bandwidth-Energy Path (PBEP) Algorithm to determine priority paths from source to destination based on bandwidth and energy levels. The protocol is evaluated using simulation and shown to improve packet delivery ratio, bandwidth index ratio, and

This paper analyzes the performance of cooperative amplify-and-forward (CAF) relay networks that employ adaptive M-ary quadrature amplitude modulation (M-QAM)/M-ary phase shift keying (M-PSK) digital modulation techniques in Nakagami-m fading channel. In particular, we present and compared the analysis of CAF relay networks with different cooperative diversity and opportunistic routing strategies such as regular Maximal Ratio Combining (MRC), Selection Diversity Combining (SDC), Opportunistic Relay Selection with Maximal Ratio Combining (ORS-MRC) and Opportunistic Relay Selection with Selection Diversity Combining (ORS-SDC). We advocate a simple yet unified numerical approach based on the marginal moment generating function (MGF) of the total received SNR to compute the average symbol error rate (ASER), mean achievable spectral efficiency, and outage probability performance metrics.

MULTICASTING BASED ENHANCED PROACTIVE SOURCE ROUTING IN MANETS

Mobile Ad-hoc Network (MANET) is an accumulation of movable nodes organizing a irregular topology without centralized administration. In a MANET, multicasting is a significant technique for utilizing data communication system. Multicasting based enhanced proactive source routing is proposed in this paper for Mobile Ad hoc Networks. It explains an innovative multicasting algorithm that considers the transmission energy and residual energy while forwarding the data packets. It improves the network throughput and raises the network lifetimes. Simulation analysis is carried in this proposed system and this method shows improved performance over the existing system.

IEEE BE-BTECH NS2 PROJECT@ DREAMWEB TECHNO SOLUTION

ranjith kumar

Dear Student, DREAMWEB TECHNO SOLUTIONS is one of the Hardware Training and Software Development centre available in Trichy. Pioneer in corporate training, DREAMWEB TECHNO SOLUTIONS provides training in all software development and IT-related courses, such as Embedded Systems, VLSI, MATLAB, JAVA, J2EE, CIVIL, Power Electronics, and Power Systems. It’s certified and experienced faculty members have the competence to train students, provide consultancy to organizations, and develop strategic solutions for clients by integrating existing and emerging technologies. ADD: No:73/5, 3rd Floor, Sri Kamatchi Complex, Opp City Hospital, Salai Road, Trichy-18 Contact @ 7200021403/04 phone: 0431-4050403

Improving the network lifetime of mane ts through cooperative mac protocol de...

Pvrtechnologies Nellore

The document proposes a novel cooperative MAC (CMAC) protocol called DEL-CMAC for improving the network lifetime of mobile ad hoc networks (MANETs). DEL-CMAC incorporates a distributed utility-based best relay selection strategy based on location information and residual energy. It also includes a cross-layer optimal transmitting power allocation scheme to conserve energy while maintaining throughput. Additionally, it provides an innovative network allocation vector setting to deal with interference from varying transmitting powers during cooperation. Simulation results show DEL-CMAC significantly prolongs network lifetime under different scenarios compared to the IEEE 802.11 standard and other throughput-focused CMAC protocols.

E-MICE: Energy-Efficient Concurrent Exploitation of Multiple Wi-Fi Radios

UniversitasGadjahMada

The concurrent use of multiple Wi-Fi radios in individual frequency channels is a solution readily available today to the increase of a mobile station’s communication capacity, but at the expense of occasional performance deterioration (when the heterogeneity of capacity between interfaces gets severe) and additional power consumption. This paper proposes a mobileside solution for the concurrent use of multiple radios in a performance-aware and energy-efficient manner, with which a mobile station activates and deactivates radio interfaces dynamically according to traffic demands and a predicted capacity gain. To this end, the proposed solution is composed of multiple prediction algorithms and a control algorithm. Prediction when activating an additional radio interface is relatively difficult since no information of the disabled interface’s current status (and the corresponding frequency channel’s) is available at the time of prediction. Our experiments show that, despite different types and used channels, different radio interfaces have a strong correlation of received signal strengths and used PHY rates between them. Based on this observation, the proposed solution learns a correlation pattern between interfaces whenever multiple interfaces are active and makes prediction of the coverage, expected PHY rate and capacity impact of an inactive interface based on the learned correlation with a currently active interface. The design of the prediction algorithms are based on a simple or machine-learning technique (SVM). The control algorithm then keeps monitoring the utilization of active interfaces and, if any of them has utilization over a threshold, checks if each inactive interface is within coverage and a valid rate range based on an active interface’s received signal strength. Finally, an action of a configuration change (either activation, deactivation or no change) selected based on the prediction of the resulting capacity is applied. Testbed experiments using COTS dual-band Wi-Fi interfaces demonstrate that the solution can enhance throughput by up to 29.6% (in a close distance to AP) and at most halve power consumption compared to legacy aggregation while the gain varies depending on the location and traffic conditions.

Performance evaluation of interference aware topology power and flow control ...

Multi-Radio Multi-Channel Wireless Mesh Network (MRMC-WMN) has been considered as one of the key technology for the enhancement of network performance. It is used in a number of real-time applications such as disaster management system, transportation system and health care system. MRMC-WMN is a multi-hop network and allows simultaneous data transfer by using multiple radio interfaces. All the radio interfaces are typically assigned with different channels to reduce the effect of co-channel interference. In MRMC-WMN, when two nodes transmit at the same channel in the range of each other, generates co-channel interference and degrades the network throughput. Co-channel interference badly affects the capacity of each link that reduces the overall network performance. Thus, the important task of channel assignment algorithm is to reduce the co-channel interference and enhance the network performance. In this paper, the problem of channel assignment has been addressed for MRMC-WMN. We have proposed an Interference Aware, Topology, Power and Flow Control (ITPFC) Channel Assignment algorithm for MRMC-WMN. This algorithm assignes the suitable channels to nodes, which provides better link capacity and reduces the co-channel interference. In the previous work performance of the proposed algorithm has been evaluated for a network of 30 nodes. The aim of this paper is to further evaluate the performance of proposed channel assignment algorithm for 40 and 50 nodes network. The results obtained from these networks show the consistent performance in terms of throughput, delay, packet loss and number of channels used per node as compared to LACA, FCPRA and IATC Channel Assignment algorithms.

Dynamic Topology Re-Configuration in Multihop Cellular Networks Using Sequent...

Cellular communications has experienced explosive growth in the past two decades. Today millions of people around the world use cellular phones. Cellular phones allow a person to make or receive a call from almost anywhere. Likewise, a person is allowed to continue the phone conversation while on the move. Cellular communications is supported by an infrastructure called a cellular network, which integrates cellular phones into the public switched telephone network. The cellular network has gone through three generations.The first generation of cellular networks is analog in nature. To accommodate more cellular phone subscribers, digital TDMA (time division multiple access) and CDMA (code division multiple access) technologies are used in the second generation (2G) to increase the network capacity. With digital technologies, digitized voice can be coded and encrypted. Therefore, the 2G cellular network is also more secure. The third generation (3G) integrates cellular phones into the Internet world by providing highspeed packet-switching data transmission in addition to circuit-switching voice transmission. The 3G cellular networks have been deployed in some parts of Asia, Europe, and the United States since 2002 and will be widely deployed in the coming years. The high increase in traffic and data rate for future generations of mobile communication systems, with simultaneous requirement for reduced power consumption, makes Multihop Cellular Networks (MCNs) an attractive technology. To exploit the potentials of MCNs a new network paradigm is proposed in this paper. In addition, a novel sequential genetic algorithm (SGA) is proposed as a heuristic approximation to reconfigure the optimum relaying topology as the network traffic changes. Network coding is used to combine the uplink and downlink transmissions, and incorporate it into the optimum bidirectional relaying with ICI awareness. Numerical results have shown that the algorithms suggested in this thesis provide significant improvement with respect to the existing results, and are expected to have significant impact in the analysis and design of future cellular networks.

Topology Management for Mobile Ad Hoc Networks Scenario

Cooperative communication is the main accessing point in present days. These results can be accessed through proactive protocol like route request packet sending and route request packet receiving. The main issue is how communication will be done in MANETS. Mobile Ad-hoc networks are self-configurable networks; each node behaves like server and client in MANET. COCO (Capacity Optimized Cooperative Communication) model was developed for accessing these types of resources in MANETs. This model can’t provide sufficient communication or overall network performance. This model provides sufficient capability improvement in mobile ad-hoc networks, but this model will be taking more power resources for doing this work. exploitation simulation examples, we have a tendency to show that physical layer cooperative communications have important impacts on the performance of topology control and network capability, and also the proposed topology management scheme will considerably improve the network capability in MANETs with cooperative communications

Fiber Optical Communication Projects Research Topics

Matlab Simulation

ADAPTIVE RANDOM SPATIAL BASED CHANNEL ESTIMATION (ARSCE) FOR MILLIMETER WAVE ...

Millimeter-wave and mMIMO communications are the most essential success systems for next-generation wireless sensor networks to have enormous amounts of accessible throughput and spectrum. Through installing huge antenna arrays at the base station and performing coherent transceiver processing, mMIMO is a potential technology for enhancing the bandwidth efficiency of wireless sensor networks. The use of mmWave frequencies for mMIMO systems solves the problem of high path-loss through offering greater antenna gains. In this work, we provide a design with a random spatial sample structure that incorporates a totally random step before the analogue is received. It contains a totally random step before the analogue received signals are sent into the digital component of the HBF receiver. Adaptive random spatial based channel estimation (ARSCE) is proposed for channel session measurement collection, and an analogue combiner with valves has been used to estimate the signals at each receiving antenna. The proposed optimization problem formulation attempts to discover the orientations and gains of wideband channel routes. In addition, our proposed model has compared to various state-of-art techniques while considering error minimization.

7 literature survey M.TECH ( PDF FILE )

The document surveys 17 literature sources on multi-carrier modulation techniques like OFDM and MC-CDMA. Several sources propose using wavelet transforms instead of Fourier transforms to improve bandwidth efficiency and reduce interference for MC-CDMA systems. Simulation results from the literature show that wavelet packet based MC-CDMA can outperform FFT based MC-CDMA in terms of lower bit error rates, especially in frequency selective fading channels. The rationale given is that wavelet transforms eliminate the need for cyclic prefixes, thereby improving spectral efficiency over traditional MC-CDMA schemes.

7 literature survey M.TECH ( M S WORD FILE )

International Journal of Technical Research & Application

The document discusses various literature on OFDM and MC-CDMA techniques. It summarizes 17 research papers on topics like using wavelet packets instead of Fourier transform in MC-CDMA to improve bandwidth efficiency and reduce interference. It also discusses using techniques like DWT, Radon transform, and antenna diversity with MC-CDMA and comparing the BER performance of different approaches in various channel conditions like AWGN, Rayleigh fading and frequency selective fading channels. The rationale given is that replacing Fourier transform with wavelet packets in MC-CDMA can eliminate the need for cyclic prefix and improve spectral efficiency.

Jamming aware traffic allocation for multiple-path routing using portfolio se...

Saad Bare

Multiple-path source routing protocols allow a data source node to distribute the total traffic among available paths. we consider the problem of jamming-aware source routing in which the source node performs traffic allocation based on empirical jamming statistics at individual network nodes. We formulate this traffic allocation as a lossy network flow optimization problem using portfolio selection theory from financial statistics. We show that in multisource networks, this centralized optimization problem can be solved using a distributed algorithm based on decomposition in network utility maximization (NUM). We demonstrate the network's ability to estimate the impact of jamming and incorporate these estimates into the traffic allocation problem. Finally, we simulate the achievable throughput using our proposed traffic allocation method in several scenarios.

PERFORMANCE ANALYSIS OF WIRELESS MESH NETWORK USING ADAPTIVE INFORMANT FACTOR...

IJCSES Journal

Wireless mesh network (WMN) has become an important leading technology which provides several types of useful applications such as community network, broadband home network and internet access, etc. The rise in the size of users in WMN has created a degradation of efficiency in a network especially in dense areas due to the clumsy channel allocation and hence creating many challenges for enhancing the users experience, network quality and throughput. Therefore in this paper, we proposed OCA based AIF model that can access the channel information and then it process to improve the RF channel association. The proposed OCA-AIF will function for each period when some interference is detected via AIF and we further extend this analysis by taking in to consideration the influence of interference to provide a high quality indicator in network. The analysis of result shows the optimization by our proposed approach which increases as per the increment of relay nodes (RNs).

VIBRANT TOPOLOGY GOVERNOR IN MOBILE AD HOC NETWORKS WITH COOPERATIVE COMMUNIC...

Cooperative communication has emerged as a new dimension of diversity to emulate the strategies designed for multiple antenna systems, since a wireless mobile device may not be able to support multiple transmit antennas due to size, cost, or hardware limitations. Capacity optimization of the wireless network is performed by making changes in the physical layer of the network. In this article, we propose a Capacity-Optimized Cooperative (COCO) topology control scheme to improve the network capacity in MANETs by jointly considering both upper layer network capacity and physical layer cooperative communications. Simulations in the network simulator are performed to show the efficiency of the system. Cooperative communication has received tremendous interest for wireless networks. Most existing works on cooperative communications are focused on link-level physical layer issues. Consequently, the impacts of cooperative communications on network-level upper layer issues, such as topology control, routing and network capacity, are largely ignored. In this article, we propose a Capacity-Optimized Cooperative (COCO) topology control scheme to improve the network capacity in MANETs by jointly considering both upper layer network capacity and physical layer cooperative communications. Through simulations, we show that physical layer cooperative communications have significant impacts on the network capacity, and the proposed topology control scheme can substantially improve the network capacity in MANETs with cooperative communications.

IRJET- Channel Allocation Strategy for Multiuser Cognitive and Location A...

IRJET Journal

This document proposes a channel allocation strategy for a cognitive radio network that takes into account the locations of secondary users. The coverage area is divided into an overlay region near primary users and a hybrid region further away. Secondary users in the overlay region use an overlay spectrum access method, while those in the hybrid region use a sensing-free method. The paper formulates a resource allocation problem that optimizes power and channel allocation for secondary users based on their locations and spectrum access methods. It then proposes an adaptive algorithm that incorporates an interference violation test to determine resource allocation parameters and enable sensing-free access, while minimizing total power consumption subject to quality of service constraints. Simulation results demonstrate the effectiveness of the proposed location-aware and adaptive strategy in improving

A Cluster-Based Routing Protocol and Fault Detection for Wireless Sensor Network

The document proposes a new clustering and routing algorithm for wireless sensor networks that aims to extend network lifetime. Key points: - The algorithm divides nodes into sensing nodes and relay nodes, with relay nodes responsible for forwarding data to reduce cluster head burden. - It selects cluster heads and relay nodes based on residual energy to distribute load and avoid early node death. - A routing tree is constructed among relay nodes to transmit data to the base station in a multi-hop manner, selecting next hops based on residual energy and number of child nodes to balance energy usage. - The goal is to improve energy efficiency, extend network lifetime, and increase data accuracy through mechanisms like clustering, load balancing, and fault detection

Channel Aware Mac Protocol for Maximizing Throughput and Fairness

IJORCS

The proper channel utilization and the queue length aware routing protocol is a challenging task in MANET. To overcome this drawback we are extending the previous work by improving the MAC protocol to maximize the Throughput and Fairness. In this work we are estimating the channel condition and Contention for a channel aware packet scheduling and the queue length is also calculated for the routing protocol which is aware of the queue length. The channel is scheduled based on the channel condition and the routing is carried out by considering the queue length. This queue length will provide a measurement of traffic load at the mobile node itself. Depending upon this load the node with the lesser load will be selected for the routing; this will effectively balance the load and improve the throughput of the ad hoc network.

PERFORMANCE ANALYSIS IN CELLULAR NETWORKS CONSIDERING THE QOS BY RETRIAL QUEU...

In this article, a retrial queueing model will be considered with persevering customers for wireless cellular networks which can be frequently applied in the Fractional Guard Channel (FGC) policies, including Limited FGC (LFGC), Uniform FGC (UFGC), Limited Average FGC (LAFGC) and Quasi Uniform FGC (QUFGC). In this model, the examination on the retrial phenomena permits the analyses of important effectiveness measures pertained to the standard of services undergone by users with the probability that a fresh call first arrives the system and find all busy channels at the time, the probability that a fresh call arrives the system from the orbit and find all busy channels at the time and the probability that a handover call arrives the system and find all busy channels at the time. Comparison between four types of the FGC policy can befound to evaluate the performance of the system.

Elastic hybrid MAC protocol for wireless sensor networks

This document summarizes an article that proposes an elastic hybrid medium access control (MAC) protocol for wireless sensor networks. The protocol aims to improve performance for diverse quality of service requirements by dynamically adapting between contention-based CSMA/CA and scheduled TDMA transmission schemes depending on traffic conditions. It allows nodes to transmit using CSMA/CA for low traffic, reserves more slots for TDMA scheduling as traffic increases, and provides an emergency contention-free period at the start of frames for urgent data. Simulation results showed improved performance over typical protocols in terms of queue delay, packet delivery ratio, and frame drops. The proposed elastic hybrid approach aims to balance efficiencies across various QoS metrics by flexibly distributing the transmission strategies in response

Segment Combination based Approach for Energy- Aware Multipath Communication ...

ijsrd.com

Underwater acoustic communication is a technique of sending and receiving message below water. There are several ways of employing such communication but the most common is using hydrophones. Under water communication is difficult due to factors like multi-path propagation, time variations of the channel, small available bandwidth and strong signal attenuation, especially over long ranges. In underwater communication there are low data rates compared to terrestrial communication, since underwater communication uses acoustic waves instead of electromagnetic waves. The data can be collected from the sensor node and transfer the data to the destination. The same source information can be send through multiple paths through the same destination. So the packet bit error rate is high and power and energy consumption for transferring data is high. The bandwidth and the energy can be consumed. And then the packet bit rate is the serious problem in the existing system. It can be overcome by using the segment combination in the hamming code technique. The packet bit rate can be overcome by increasing the number of paths. The number of paths can be increased based on calculating the cost. For calculating the cost, least cost algorithm is used. And based on the minimum cost path, the path is chosen and data is transferred to the same destination.

Optimized reduction approach of congestion in mobile ad hoc network based on...

Over the past decades, computer networks have experienced an outbreak and with that came severe congestion problems. Congestion is a crucial determinant in the delivery of delay-sensitive applications (voice and video) and the quality of the network. in this paper, the Lagrangian optimization rate, delay, packet loss, and congestion approach (LORDPC) are presented. A congestion avoidance routing method for device-to-device (D2D) nodes in an ad hoc network that addresses the traffic intensity problem. The method of Lagrange multipliers is utilized for active route election to dodge heavy traffic links. To demonstrate the effectiveness of our proposed method, we applied extensive simulation that presents path discovery and selection. Results show that LORDPC decreases delay and traffic intensity while maintaining a high bitrate and low packet loss rate and it outperformed the ad hoc on-demand distance vector (AODV) protocol and the Lagrangian optimization rate, delay, and packet loss, approach (LORDP).

What's hot

PERFORMANCE ANALYSIS OF THE LINK-ADAPTIVE COOPERATIVE AMPLIFY-AND-FORWARD REL...

MULTICASTING BASED ENHANCED PROACTIVE SOURCE ROUTING IN MANETS

IEEE BE-BTECH NS2 PROJECT@ DREAMWEB TECHNO SOLUTION

ranjith kumar

Improving the network lifetime of mane ts through cooperative mac protocol de...

Pvrtechnologies Nellore

E-MICE: Energy-Efficient Concurrent Exploitation of Multiple Wi-Fi Radios

UniversitasGadjahMada

Performance evaluation of interference aware topology power and flow control ...

Dynamic Topology Re-Configuration in Multihop Cellular Networks Using Sequent...

Topology Management for Mobile Ad Hoc Networks Scenario

Fiber Optical Communication Projects Research Topics

Matlab Simulation

ADAPTIVE RANDOM SPATIAL BASED CHANNEL ESTIMATION (ARSCE) FOR MILLIMETER WAVE ...

7 literature survey M.TECH ( PDF FILE )

7 literature survey M.TECH ( M S WORD FILE )

International Journal of Technical Research & Application

Jamming aware traffic allocation for multiple-path routing using portfolio se...

Saad Bare

PERFORMANCE ANALYSIS OF WIRELESS MESH NETWORK USING ADAPTIVE INFORMANT FACTOR...

IJCSES Journal

VIBRANT TOPOLOGY GOVERNOR IN MOBILE AD HOC NETWORKS WITH COOPERATIVE COMMUNIC...

IRJET- Channel Allocation Strategy for Multiuser Cognitive and Location A...

IRJET Journal

A Cluster-Based Routing Protocol and Fault Detection for Wireless Sensor Network

Channel Aware Mac Protocol for Maximizing Throughput and Fairness

IJORCS

PERFORMANCE ANALYSIS IN CELLULAR NETWORKS CONSIDERING THE QOS BY RETRIAL QUEU...

Elastic hybrid MAC protocol for wireless sensor networks

What's hot (20)

PERFORMANCE ANALYSIS OF THE LINK-ADAPTIVE COOPERATIVE AMPLIFY-AND-FORWARD REL...

MULTICASTING BASED ENHANCED PROACTIVE SOURCE ROUTING IN MANETS

IEEE BE-BTECH NS2 PROJECT@ DREAMWEB TECHNO SOLUTION

Improving the network lifetime of mane ts through cooperative mac protocol de...

E-MICE: Energy-Efficient Concurrent Exploitation of Multiple Wi-Fi Radios

Performance evaluation of interference aware topology power and flow control ...

Dynamic Topology Re-Configuration in Multihop Cellular Networks Using Sequent...

Topology Management for Mobile Ad Hoc Networks Scenario

Fiber Optical Communication Projects Research Topics

ADAPTIVE RANDOM SPATIAL BASED CHANNEL ESTIMATION (ARSCE) FOR MILLIMETER WAVE ...

7 literature survey M.TECH ( PDF FILE )

7 literature survey M.TECH ( M S WORD FILE )

Jamming aware traffic allocation for multiple-path routing using portfolio se...

PERFORMANCE ANALYSIS OF WIRELESS MESH NETWORK USING ADAPTIVE INFORMANT FACTOR...

VIBRANT TOPOLOGY GOVERNOR IN MOBILE AD HOC NETWORKS WITH COOPERATIVE COMMUNIC...

IRJET- Channel Allocation Strategy for Multiuser Cognitive and Location A...

A Cluster-Based Routing Protocol and Fault Detection for Wireless Sensor Network

Channel Aware Mac Protocol for Maximizing Throughput and Fairness

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Elastic hybrid MAC protocol for wireless sensor networks

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Segment Combination based Approach for Energy- Aware Multipath Communication ...

ijsrd.com

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$Enhanced fractional frequency reuse approach for interference mitigation in f...$ $Enhanced fractional frequency reuse approach for interference mitigation in f...$

Enhanced fractional frequency reuse approach for interference mitigation in f...

journalBEEI

Small cell networks are expected to heavily be deployed in wireless communication networks due to it ability to enhance signals quality and spectrum utilisation. However, interference is posing a major threat to wireless communication especially cellular femtocell networks whereby its performance is degraded in dense deployment areas. For this reason, an enhanced fractional frequency reuse approach is proposed in this paper to mitigate the interference in femtocell networks. This is achieved by dividing the service area and frequency into three regions and three sets whereby each set is allocated different frequency set. The femtocell location is later obtained and assigned frequency in accordance to the region. The proposed approach helps in reducing the interference, boost the signal to interference plus noise (SINR), and enhance the throughput.

Resource Allocation in MIMO – OFDM Communication System under Signal Strength...

Kumar Goud

Abstract: - Multiple Inputs and Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) system have the potential to attain high capability on the propagation setting. The aim of this paper is that the adaptive resource allocation in MIMO-OFDM system uses the water filling formula. Water filling answer is enforced for allocating the ability so as to extend the data rate. The overall system capability is maximised subject to the constraints on total power, signal to noise quantitative relation, and proportionality. Channel is assumed as a flat attenuation channel and therefore the comparison is created for various 2×2, 2×3, 3×2 and 4×4 MIMO-OFDM systems and water filling formula with allotted power. Supported the capability contribution from the relaying terminal, a brand new parameter referred to as cooperation constant is introduced as an operate of the relaying sub channel. This parameter is employed to switch the target parameter of the subcarrier allocation procedure. Fairness-oriented [Fading Channel] and throughput-oriented [Near finish Channel] algorithms square measure elite from the literature to check the planned technique. Each algorithms square measure changed to use the mean of cooperation constant within the objective parameter of the subcarrier allocation procedure and shown to own a much better total turnout with none sacrifice. Keywords - MIMO-OFDM; Water filling Algorithm; Subcarrier Resource Allocation

Estimation of bit error rate in 2×2 and 4×4 multi-input multioutput-orthogon...

Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems with multiple input antennas and multiple output antennas in dynamic environments face the challenge of channel estimation. To overcome this challenge and to improve the performance and signal-tonoise ratio, in this paper we used the Kalman filter for the correct estimation of the signal in dynamic environments. To obtain the original signal at the receiver end bit error rate factor plays a major role. If the signal to noise ratio is high and the bit error rate is low then signal strength is high, the signal received at the receiver end is almost similar to the i th transmitted signal. The dynamic tracking characteristic of Kalman filter is used to establish a dynamic space-time codeword and a collection of orthogonal pilot sequences to prevent interference among transmissions in this paper. Using the simulation, the Kalman filter method can be compared to the other channel estimation method presented in this paper that can track timevarying channels rapidly.

An effective transmit packet coding with trust-based relay nodes in VANETs

journalBEEI

Vehicular ad-hoc networks (VANETs) are characterized by limited network resources such as limited bandwidth and battery capacity. Hence, it is necessary that unnecessary use of network resources (such as unnecessary packet transfers) is reduced in such networks so that the available power can be conserved for efficient multicast communications. In this paper, we have presented a Transmit Packet Coding (TPC) Network Coding in VANET to ensure reliable and efficient multicasting. With network coding, the number of transmitted packets over the network can be reduced, ensuring efficient utilization of network devices and resources. Here, the trust-based graph optimization is performed using Cuckoo search algorithm to select the secure relay nodes. The experimental results showed the superiority of the presented approach compared to the existing techniques in terms of throughput, latency, hop delay, packet delivery ratio, network decoder outage probability, and block error rate.

50120140502016

IAEME Publication

This document discusses improving energy efficient and secure multipath communication in underwater sensor networks. It proposes using Hamming coding based segment combination and localization to prevent wormhole attacks. The key points are: 1) Underwater sensor networks face challenges like high bit error rates, long delays, and low bandwidth. Multipath communication with forward error correction can improve reliability but still has issues. 2) The proposed approach uses Hamming coding on packet segments, combines segments at the destination, and uses localization to detect wormholes. 3) Simulation results show the proposed approach reduces packet error rates and energy consumption compared to single path and multipath approaches without segment coding.

EFFICIENT ANALYSIS OF THE ERGODIC CAPACITY OF COOPERATIVE NON-REGENERATIVE RE...

ijwmn

This paper proposes a novel efficient method to analyze the ergodic channel capacity of cooperative amplify-and-forward relay systems. This is accomplished by employing a very tight approximate moment generating function of the end-to-end signal-to-noise ratio that is applicable to various fading environments, including mixed and composite fading channels. Three adaptive source transmission policies are considered: constant power with optimal rate adaptation, optimal joint power and rate adaptation, and fixed rate with truncated channel inversion. Closed-form expressions for ergodic capacity under these policies are derived for Nakagami-m fading with independent but not identically distributed statistics. The accuracy of the proposed approximate method is validated through existing results and Monte Carlo simulations.

EFFICIENT ANALYSIS OF THE ERGODIC CAPACITY OF COOPERATIVE NON-REGENERATIVE RE...

ijwmn

In this paper, we proposed a novel efficient method of analyzing the ergodic channel capacity of the cooperative amplify-and-forward (CAF) relay system. This is accomplished by employing a very tight approximate moment generating function (MGF) of end-to-end signal-to-noise ratio of 2-hop multi-relay system, which is In this paper, we proposed a novel efficient method of analyzing the ergodic channel capacity of the cooperative amplify-and-forward (CAF) relay system. This is accomplished by employing a very tight approximate moment applicable to myriad of fading environments including mixed and composite fading channels. Three distinct adaptive source transmission policies were considered in our analysis namely: (i) constant power with optimal rate adaptation (ORA); (ii) optimal joint power and rate adaptation (OPRA); and (iii) fixed rate with truncated channel inversion (TCIFR). The proposed frame work based on the novel approximate MGF method is sufficiently general to encapsulate all types of fading environments (especially for the analysis of the mixed fading case)and provides significant advantage to model wireless system for mixed and composite fading channel. In addition to simplifying computation complexity of ergodic capacity for CAF relaying schemes treated in literature, we also derive closed form expressions for the above three adaptive source transmission policies under Nakagami-m fading with i.n.d statistics. The accuracy of our proposed method has been validated with existing MGF expressions that are readily available for specific fading environments in terms of bounds, and via Monte Carlo simulations.

Energy efficiency optimization for mobile ad hoc networks

redpel dot com

Optimize the Network Coding Paths to Enhance the Coding Protection in Wireles...

Efficient protection techniques for multimedia data transfer over Wireless Sensor Network (WSN) are very essential issues. In noisy Wireless Multimedia Sensor Networks (WMSN) Quality of Service (QoS) is a challenging task due to bandwidth and limited energy, and unpredictable channel conditions. Therefore, Forward Error Correction (FEC), a class of channel coding has been widely used in WSN. Nevertheless, the bulky size of multimedia data makes it more difficult to be transported over the noisy multi-hop wireless network. Moreover, the efficiency of FEC drops as the number of hops increases. In this paper, an optimized protection technique based on network coding and rateless code has been proposed to enhance the throughput and reduce overhead during data transfer in WMSN. The performance of NCP-OPR is enhanced via Optimal Network Path Model (ONPM) where the best available paths are optimally selected using Particle Swarm Optimization (PSO). In conjunction with the proposed protection scheme, the proposed ONPM is intended for limited power WSN by optimally distributing the power usage among the network paths so that the throughput can be improved.

Optimize the Network Coding Paths to Enhance the Coding Protection in Wireles...

- The document proposes an optimized protection technique using network coding and rateless codes to enhance throughput and reduce overhead during data transfer in wireless multimedia sensor networks. - It presents an Optimal Network Path Model (ONPM) that uses Particle Swarm Optimization to select the best available paths in a way that optimally distributes power usage among network paths to improve throughput. - The performance of the proposed ONPM is evaluated through simulations and compared to existing algorithms, showing it can enhance coding protection and effectively optimize network paths to improve data transfer in wireless multimedia sensor networks.

A NOVEL HYBRID OPPORTUNISTIC SCALABLE ENERGY EFFICIENT ROUTING DESIGN FOR LOW...

Opportunistic Routing (OR) scheme increases the transmission reliability despite the lossy wireless radio links by exploiting the broadcast nature of the wireless medium. However, OR schemes in low power Wireless Sensor Network (WSN) leads to energy drain in constrained sensor nodes due to constant overhearing, periodic beaconing for Neighbourhood Management (NM) and increase in packet header length to append priority wise sorted Forwarding Candidates Set (FCS) prior to data transmission. The timer-based coordination mechanism incurs the least overhead to coordinate among the FCS that has successfully received the data packet for relaying the data in a multi-hop manner. This timer-based mechanism suffers from duplicate transmissions if the FCS is either not carefully selected or coordinated. The focus of this work is to propose a hybrid opportunistic energy efficient routing design for large scale, low power and lossy WSN. This design avoids periodic 'hello' beacons for NM, limits constant overhearing and increase in packet header length. There are two modes of operation i) opportunistic ii) unicast mode. The sender node adopts opportunistic forwarding for its initial data packet transmission and instead of pre-computing the FCS, it is dynamically computed in a completely distributed manner. The eligible nodes to be part of FCS will be neighbour nodes at lower corona level than the sender with respect to the sink and remaining energy above the minimum threshold. The nodes part of FCS based on crosslayered multi-metrics and fuzzy decision logic determines its priority level to compute Dynamic Holding Delay (DHD) for effective timer coordination. The differentiated back off implementation along with DHD enables the higher priority candidate that had received data packet to forward the packet first and facilitates others to cancel its timer upon overhearing. The sender node switches to unicast mode of forwarding for successive transmissions by choosing the forwarding node with maximum trust value as it denotes the stability of the temporally varying link with respect to the forwarder. The sender node will revert to opportunistic mode to increase transmission reliability in case of link-level transmission error or no trustworthy forwarders. Simulation results in NS2 show significant increase in Packet Delivery Ratio (PDR),decrease in both average energy consumption per node and Normalized Energy Consumption (NEC) per packet in comparison with existing protocols.

Multipoint Relay Path for Efficient Topology Maintenance Algorithm in Optimiz...

The Optimal Link State Routing (OLSR) protocol employs multipoint relay (MPR) nodes to disseminate topology control (TC) messages, enabling network topology discovery and maintenance. However, this approach increases control overhead and leads to wasted network bandwidth in stable topology scenarios due to fixed flooding periods. To address these challenges, this paper presents an Efficient Topology Maintenance Algorithm (ETM-OLSR) for Enhanced Link-State Routing Protocols. By reducing the number of MPR nodes, TC message generation and forwarding frequency are minimized. Furthermore, the algorithm selects a smaller subset of TC messages based on the changes in the MPR selection set from the previous cycle, adapting to stable and fluctuating network conditions. Additionally, the sending cycle of TC messages is dynamically adjusted in response to network topology changes. Simulation results demonstrate that the ETM-OLSR algorithm effectively reduces network control overhead, minimizes end-to-end delay, and improves network throughput compared to traditional OLSR and HTR-OLSR algorithms.

Multipoint Relay Path for Efficient Topology Maintenance Algorithm in Optimiz...

A017440109

IOSR Journals

1) The document proposes an Energy Efficient Traffic Routing mechanism based on Point Synchronization Fitness Functioning (EETR-PSFF) to reduce energy consumption in wireless sensor networks. 2) EETR-PSFF aims to improve energy efficiency and bandwidth utilization by enabling sensor nodes to sleep periodically and allocating traffic slots actively. 3) It further aims to reduce the average energy consumption during wake-up processes using a Point Synchronization Fitness Function that sums the coverage values and divides by a product rule relating to the number of source nodes.

$Promoting fractional frequency reuse performance for combating pilot contami...$ $Promoting fractional frequency reuse performance for combating pilot contami...$

Promoting fractional frequency reuse performance for combating pilot contami...

Massive multiple-input multiple-output (MIMO) improves spectrum efficiency by increasing the capacity of the wireless structure. Therefore, massive MIMO is promising for fifth generation (5G) wireless communications. In massive MIMO, channel estimation is a crucial part that should achieve reliable performance. Pilots are sent from the end-users to be used for estimating the channel. However, the problem of interference in pilot contamination affects the performance for cell-edge users. Specifically, pilot contamination appears when the same pilot sequence is utilized at the same time by more than one terminal. This lead to an inaccurate estimation of the channel. Consequently, the decoded data will not be reliable. For mitigating these pilot contamination effects, an enhanced fractional frequency reuse (eFFR) scheme is proposed that uses an algorithm in the allocation of pilot sequences to end users’ devices based on the locations of the users from the target base station (BS). The simulation results exhibit that the proposed scenario outweighs the traditional FFR within both signal to interference, and noise ratio (SINR), and capacity. Consequently, the suggested scenario enhances the performance of more than 80% of the cell terminals and the other 20% of the terminals have a slightly lower performance compared to the FFR.

7. 7775 8118-1-pb

IAESIJEECS

This document discusses improving network lifetime in ad hoc networks through energy efficient routing. It proposes a routing mechanism that considers both the minimum hop count and residual energy of nodes to select paths for data transmission. The key points are: 1) Existing routing mechanisms only consider hop count and do not account for node energy levels, which can reduce network lifetime. 2) The proposed mechanism selects paths based on both minimum hop count and maximum residual energy of nodes. This avoids overusing certain nodes and depleting their energy. 3) It describes the routing procedure, energy efficient data transmission, and modules for calculating packet numbers, inserting values in routing lists, selecting paths, and handling residual routing when nodes have low energy.

AN EFFICIENT AND STABLE ROUTING ALGORITHM IN MOBILE AD HOC NETWORK

Mobile Ad hoc Network (MANET) is mainly designed to set up communication among devices in infrastructure-less wireless communication network. Routing in this kind of communication network is highly affected by its restricted characteristics such as frequent topological changes and limited battery power. Several research works have been carried out to improve routing performance in MANET. However, the overall performance enhancement in terms of packet delivery, delay and control message overhead is still not come into the wrapping up. In order to overcome the addressed issues, an Efficient and Stable-AODV (EFST-AODV) routing scheme has been proposed which is an improvement over AODV to establish a better quality route between source and destination. In this method, we have modified the route request and route reply phase. During the route request phase, cost metric of a route is calculated on the basis of parameters such as residual energy, delay and distance. In a route reply phase, average residual energy and average delay of overall path is calculated and the data forwarding decision is taken at the source node accordingly. Simulation outcomes reveal that the proposed approach gives better results in terms of packet delivery ratio, delay, throughput, normalized routing load and control message overhead as compared to AODV

An Efficient and Stable Routing Algorithm in Mobile Ad Hoc Network

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EFFICIENT ANALYSIS OF THE ERGODIC CAPACITY OF COOPERATIVE NON-REGENERATIVE RE...

Energy efficiency optimization for mobile ad hoc networks

Optimize the Network Coding Paths to Enhance the Coding Protection in Wireles...

A NOVEL HYBRID OPPORTUNISTIC SCALABLE ENERGY EFFICIENT ROUTING DESIGN FOR LOW...

Multipoint Relay Path for Efficient Topology Maintenance Algorithm in Optimiz...

A017440109

$Promoting fractional frequency reuse performance for combating pilot contami...$ $Promoting fractional frequency reuse performance for combating pilot contami...$

Promoting fractional frequency reuse performance for combating pilot contami...

7. 7775 8118-1-pb

AN EFFICIENT AND STABLE ROUTING ALGORITHM IN MOBILE AD HOC NETWORK

An Efficient and Stable Routing Algorithm in Mobile Ad Hoc Network

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