Network coding based lifetime optimization of wireless multi-hop networks
LU Zhi-ji · Jisuanji yingyong yanjiu · 2014
In energy constrained wireless networks,it always required to extend the network lifetime. For network lifetime optimization problem,three circumstances were considered under random topology simultaneously,which were no network coding,two-way network coding,and overhearing network coding respectively. The network lifetime was evaluated and optimized via interior-point method with respect to power control model,number of flows,traffic demand distribution,and initial energy of each node. Simulation results under different network conditions show that network coding can improve lifetime gain in case of weak power control,while both this gain and computation overhead increase with the number of flows,and that traffic demand distribution and initial energy have little impact on the lifetime. The results also show that the performance of two-way network coding is similar with that of overhearing network coding,while having lower computation overhead.