Lifetime maximization for amplify-and-forward cooperative networks
- 20 May 2008
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Wireless Communications
- Vol. 7 (5), 1800-1805
- https://doi.org/10.1109/twc.2008.061075
Abstract
Joint relay-selection and power-allocation strategies are devised to prolong the lifetime of amplify-and-forward (AF) cooperative networks. Lifetime is defined as the time duration within which the desired signal-to-noise ratio (SNR) at the destination is met with a certain probability. Based on selective relaying, we propose three strategies that take into account the local channel state information (CSI) and the local residual energy information (REI) at each relay to prolong the network lifetime. With a finite number of power levels, the energy dissipation process can be modeled as a finite-state Markov chain and the optimal lifetime maximization strategy can be derived using dynamic programming. We demonstrate that the network lifetime can be extended considerably by exploiting both CSI and REI via numerical simulation. The performance of the proposed strategies that utilize only local CSI and REI is shown to be comparable to that of the optimal strategy that demands global CSI and REI.Keywords
This publication has 12 references indexed in Scilit:
- An Integrated Approach to Energy-Aware Medium Access for Wireless Sensor NetworksIEEE Transactions on Signal Processing, 2007
- Cooperative Communications in Resource-Constrained Wireless NetworksIEEE Signal Processing Magazine, 2007
- Transmission Scheduling for Optimizing Sensor Network Lifetime: A Stochastic Shortest Path ApproachIEEE Transactions on Signal Processing, 2007
- Lifetime Maximization for Amplify-and-Forward Cooperative NetworksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2007
- Improving Amplify-and-Forward Relay Networks: Optimal Power Allocation versus SelectionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- A simple Cooperative diversity method based on network path selectionIEEE Journal on Selected Areas in Communications, 2006
- Energy-aware date-centric MAC for application-specific sensor networksPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networksIEEE Transactions on Information Theory, 2003
- Opportunistic large arrays: cooperative transmission in wireless multihop ad hoc networks to reach far distancesIEEE Transactions on Signal Processing, 2003
- Multi-user spatial diversity in a shadow-fading environmentPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003