Routing optimization for Wireless Networks with cooperative techniques
L. K. Hema, M. Chitra · 2011
The impact of unreliable routing, fading and other contingencies in wireless channels can be counteracted by incorporating communication diversity and introducing cooperative paradigms, where third-party nodes contribute to assist the communication. The approaches that are in use today combine both cooperative relaying and coded cooperation. In this article we are introducing a deterministic routing technique to improve the performance of the existing system. We focus on a multiple-input multiple-output ad hoc scenario and show that the improvement brought by cooperative relaying and coded cooperation is not always sufficient; in certain cases the former can be ineffective if no proper relay can be selected, and the latter leads to an overall increase of interference, thus worsening the quality of surrounding links. Therefore, we suggest that along with cooperative relaying and coded cooperation, we are incorporating a new technique to alleviate the problems. Such a joint solution is shown to achieve a significant improvement over the individual approaches. We conclude by discussing future evolutions of the cooperative relaying, coded cooperation and deterministic routing technique and their advanced implementation issues.