As a multi-hop and peer-to-peer network, mobile ad hoc network has attracted more and more attentions for its convenience and flexibility in both military field and civilian fields. But the dynamic topology and limited network resources bring great challenges to implement cheap shoes blog 2010 in ad hoc networks.MAC (Medium Access Control) protocol, which lies in the bottom of the protocol stack, is the key to implement QoS in ad hoc networks. In Ad Hoc network, hop count plays an important role in QoS implementation of ad hoc networks. For a single data flow, the end-to-end throughput decreases with the increasing of the hop count in the flow. For two neighboring data blog wedding dresses 2010 flows with different hop count, the shorter flow is entitled to much larger bandwidth than the longer flow. Unfairness exists in ad hoc networks among flows with different hop counts. Most of the cheap polo shirts (Binary Exponential Backoff cheap jeans shop) related MAC backoff algorithms adjust the parameters in backoff process according to the current network parameters such as throughput, delay and so on, which ignore the hop count factors in Ad Hoc networks.This thesis gives a novel MAC backoff mechanism based on hop count of the data packet to transmit. Nodes in network adjust its backoff parameters dynamically based on the rest hop count of the packet, in order to balance the network resource. By simulation under discount wedding prom dresses, the new algorithm to some extent alleviates the unfairness among flows with different hop counts, and improves the performance of the network.
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