Abstract
One of the choke point of AD HOC network is that the system hasnt resolved the problem of QOS in the MAC layer, the MAC layer QOS of AD HOC network is divided into two levels, one is flow level, and the other is node level. In order to solve QOS problem, this paper proposed a new algorithm IMSMAC, the algorithm use penalty function to optimize the value of different level of service in flow level, and use different priority backoff index to different node in node level. Analysis the throughput and delay of IMSMAC and DCF in NS2, the result showed that the high priority service have a certain degree of improvement in throughput and delay in IMSMAC algorithm.
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