Distributed Dynamic Route Data Transmission in Wireless Multiuser Multihop Networks

In a wireless ad hoc network, multihop data transmission between source and destination nodes using intermediate relays extends the coverage area and enhances the network throughput. We consider a wireless multiuser multihop network where each data transmission flow is subject to a constraint on the end-to-end buffering delay and the associated packet drop rate as the quality of service (QoS) requirement. The objective is to maximize the weighted sum-rate between sourcedestination pairs, while the corresponding QoS requirements are satisfied. We present two new distributed cross-layer dynamic route data transmission schemes that involve physical, MAC, and network layers. In the proposed opportunistic dynamic route data transmission scheme, the data transmission routes to destinations are dynamically determined based on the state of network nodes’ buffers and the instantaneous state of fading channels. In the same setting, the proposed planned dynamic route data transmission scheme utilizes the average quality of channels instead for more efficient implementation. Detailed results and comparisons are provided, which demonstrate the superior performance of the proposed cross-layer dynamic route data transmission schemes.