Throughput Optimization Using Cross Layer Flow-Based Framework in Cooperative Wireless Multihop Networks

This work aims to improve the performance of cooperative relaying in interference-limited multihop networks. The multihop network nodes are equipped with multi-rate and continuous power control capabilities. The existing technique does not yield significant performance gains with multi-rate and power control capabilities. To obtain the achievable throughput rates, a cross-layer flow-based framework design is proposed. This framework jointly optimizes the parameters for multi-path routing, scheduling, rates, transmit powers, and selection of cooperative nodes. It optimally obtains the max-min throughput when the cooperation is based on the distributed Alamouti code. Alamouti code is a technique used in wireless communication to transmit multiple copies of a data stream across a number of antennas and to exploit the various versions of the data to improve the reliability of data transfer. Simulation results obtained achieved better performance than the existing methods.