Investigating cost-effective relay selection in multi-hop cooperative networks

The multi-hop cross-layer cooperative relaying system is essential for reliable wireless transmission over long distances. Relaying technology enhances performance and expands coverage areas through cooperative diversity. In this system, each node receives a signal from previous nodes and forwards it to the next, maintaining diversity gain without requiring more antennas at any node. Relay networks have garnered significant interest for their use in deploying limited-size, power-constrained nodes in severely fading environments. In these networks, signals are processed by amplify-and-forward (AF) or decode-and-forward (DF) operations before being relayed. This study focuses on a cooperative single-input single-output (SISO) cross-layer AF multi-hop relaying network, proposing a novel and efficient approach to route selection. The proposed low-cost, near-optimal routing and power allocation strategies significantly improve system performance while reducing computational complexity. Theoretical and simulated results demonstrate the superiority of the proposed methods over traditional schemes, offering notable enhancements in bit error rate (BER) and outage probability.

کلیدواژه ها:

Amplify-and-forward (AF) ، Selection relaying ، Cooperative system ، Multi-hop transmission ، Rayleigh