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为提高多信道无线多跳网络的效用,提出了一种实际可行的跨层优化机制.利用该机制,每个节点在传输层使用联合设计算法分布式地调整流速率,在链路层根据所提出的分布式调度算法进行速率分配;网关节点使用所提出的干扰代价最小的信道分配算法集中式地分配信道.通过在层间和节点间传递信息来协调这些层的工作,比集中式算法降低了复杂度,减少了信令开销.仿真结果表明,该机制具有快速收敛性,且能保证业务流间的公平性;随着可用射频和信道数目的增加,业务流的速率和网络效用增加.
To improve the effectiveness of multi-channel wireless multi-hop network, a feasible cross-layer optimization mechanism is proposed.Using this mechanism, each node uses joint design algorithm to adjust the flow rate in the transport layer in a distributed way, The distributed scheduling algorithm proposed in this paper is used for rate assignment, and the gateway node distributes channels centrally using the proposed channel allocation algorithm with the lowest interference cost. Coordinating the work of these layers by transferring information between layers and nodes is less than the centralized algorithm The complexity is reduced and the signaling overhead is reduced.The simulation results show that the mechanism has fast convergence and ensures the fairness of service flows and increases the rate and network utility of service flows as the number of available radios and channels increases.