Principles of mobile communication (2nd ed.)
Principles of mobile communication (2nd ed.)
On deriving the upper bound of α-lifetime for large sensor networks
Proceedings of the 5th ACM international symposium on Mobile ad hoc networking and computing
Maximum lifetime routing in wireless sensor networks
IEEE/ACM Transactions on Networking (TON)
Using limited feedback in power allocation design for a two-hop relay OFDM system
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Transmission Scheduling for Optimizing Sensor Network Lifetime: A Stochastic Shortest Path Approach
IEEE Transactions on Signal Processing
Optimal power allocation for relayed transmissions over Rayleigh-fading channels
IEEE Transactions on Wireless Communications
Symbol error probabilities for general Cooperative links
IEEE Transactions on Wireless Communications
Cross-Layer Design for Lifetime Maximization in Interference-Limited Wireless Sensor Networks
IEEE Transactions on Wireless Communications
Improving amplify-and-forward relay networks: optimal power allocation versus selection
IEEE Transactions on Wireless Communications
Lifetime maximization for amplify-and-forward cooperative networks
IEEE Transactions on Wireless Communications - Part 2
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Capacity bounds and power allocation for wireless relay channels
IEEE Transactions on Information Theory
Resource Allocation for Wireless Fading Relay Channels: Max-Min Solution
IEEE Transactions on Information Theory
Cooperative communication in wireless networks
IEEE Communications Magazine
Fading relay channels: performance limits and space-time signal design
IEEE Journal on Selected Areas in Communications
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
Lifetime maximization via cooperative nodes and relay deployment in wireless networks
IEEE Journal on Selected Areas in Communications
Joint optimization of relay strategies and resource allocations in cooperative cellular networks
IEEE Journal on Selected Areas in Communications
Joint resource allocation for lifetime-aware cooperative multi-carrier DF system
International Journal of Automation and Computing
Hi-index | 35.68 |
We study the problem of optimal power allocation among relays for lifetime maximization in a dual-hop cooperative network operated by amplify-and-forward relays with battery limitation. We first formulate the optimization problem for global noncausal power allocation and present a solution based on dual decomposition. In the special case of static channels, we provide a closed-form solution for lifetime maximization, which simply requires equally distributing energy over time for each participating relay. Based on this, we then develop a perceived lifetime (PLT) power allocation strategy, which can be viewed as a causal implementation of the noncausal solution by considering only the current channel state information. We also present a minimum weighted total power (MWTP) strategy that does not depend on the prediction of future channel state. PLT and MWTP are compared through analysis and simulation, and it is demonstrated that both result in lifetime performance close to that of the noncausal optimal solution, and that they significantly outperform the conventional strategy of minimizing the total power per transmission, especially when the link conditions are asymmetric or initial energy levels nonuniform among relays. We further extend the proposed power allocation strategies to relay cooperation with multiple sources and discuss how different network configurations affect relay power sharing among the sources.