Cross Layer Power And Rate Adaptation Techniques For Wireless Networks
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Cross-layer Power and Rate Adaptation Techniques for Wireless Networks
Author: Ashok Karmokar
language: en
Publisher: LAP Lambert Academic Publishing
Release Date: 2011-07
Packet scheduling using variable power and variable rate is very important techniques in wireless networks due to limited bandwidth resources and increasing demand for high data rates. Time-varying incoming traffic and random channel gain make the scheduling decision very challenging. Current packet adaptation techniques deal with the single layer optimizations in each layer separately, which results in suboptimal performance when system-level performance parameters are considered. This book discusses both the optimal and the reduced-complexity heuristic cross-layer adaptation techniques over time-varying correlated fading channels. Due to the inherent dynamic nature of the packet scheduling, the problem are formulated from the cross-layer optimization viewpoint using Markov decision processes framework, by considering both the physical and the data link layers optimization objectives. The objective is to jointly maximize throughput, and minimize power and buffering delay while maintaining packet overflow and bit error rate requirements. The book provides crucial insight on the trade-off among the various quality-of-service (QoS) objectives.
Adaptation and Cross Layer Design in Wireless Networks
Adaptive techniques play a key role in modern wireless communication systems. The concept of adaptation is emphasized in the Adaptation in Wireless Communications Series through a unified framework across all layers of the wireless protocol stack ranging from the physical layer to the application layer, and from cellular systems to next-generation wireless networks. Adaptation and Cross Layer Design in Wireless Networks is devoted to adaptation in the data link layer, network layer, and application layer. The book presents state-of-the-art adaptation techniques and methodologies, including cross-layer adaptation, joint signal processing, coding and networking, selfishness in mobile ad hoc networks, cooperative and opportunistic protocols, adaptation techniques for multimedia support, self –organizing routing, and tunable security services. It presents several new theoretical paradigms and analytical findings which are supported with various simulation and experimental results. Adaptation in wireless communications is needed in order to achieve high capacity and ubiquitous communications. The current trend in wireless communication systems is to make adaptation dependent upon the state of the relevant parameters in all layers of the system. Focusing on simplified cross layer design approaches, this volume describes advanced techniques such as adaptive resource management, adaptive modulation and coding, 4G communications, QoS, diversity combining, and energy and mobility aware MAC protocols. The first volume in the series, Adaptive Signal Processing in Wireless Communications (cat no.46012) covers adaptive signal processing at the physical layer.
Using Cross-Layer Techniques for Communication Systems
Although the existing layering infrastructure--used globally for designing computers, data networks, and intelligent distributed systems and which connects various local and global communication services--is conceptually correct and pedagogically elegant, it is now well over 30 years old has started create a serious bottleneck. Using Cross-Layer Techniques for Communication Systems: Techniques and Applications explores how cross-layer methods provide ways to escape from the current communications model and overcome the challenges imposed by restrictive boundaries between layers. Written exclusively by well-established researchers, experts, and professional engineers, the book will present basic concepts, address different approaches for solving the cross-layer problem, investigate recent developments in cross-layer problems and solutions, and present the latest applications of the cross-layer in a variety of systems and networks.