Cooperative and opportunistic protocols

Although there is obviously an enormous interest in cooperative techniques in the research community,  most of the performance analysis for cooperative communication is widely studied at physical layer. In order to make cooperative techniques be able to be utilized in the next generation of wireless networks, the higher layer protocols such as medium access control (MAC) layer, routing layer, … must be thoroughly considered. Among the higher layers, MAC layer is responsible for regulating the shared wireless medium access of the networks, therefore, it has great influences on the network performance. In addition, MAC layer is also expected to improve throughput or energy efficiency, reduce delay while keeping the collisions to a minimum.

Cooperative MAC Protocol

Cooperative MAC Protocol

Opportunistic routing aims at exploiting sporadic radio links to  improve the connectivity of multi-hop  networks  and  to  foster  data  transmissions.  However,  the  benefit  of  opportunistic  relaying  may  be counteracted  due  to  energy  increase  resulted  from  multiple  active  receivers.  Therefore, we are conducting thorough analysis of opportunistic relaying efficiency under the different realistic radio channel conditions, to find the optimal tradeoff between two objectives: energy and latency minimizations, with  a  hard  reliability  constraint.

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