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为了获得具备良好的用户分集效果和路由稳定性的无线mesh网络,提出了一种虚拟层次化网络架构.这种无线mesh网络将临近节点聚合为虚拟小区,该小区内部节点不仅能够直接通信,还具有路由转发功能.虚拟小区内部节点之间的连接构成虚拟的底层网络,虚拟小区之间的连接则构成虚拟的顶层网络.为解决虚拟层次化无线mesh网络的信道资源分配问题,提出了一种图着色模型——广义集合T-coloring模型.该模型以虚拟小区为无线信道的分配单位,并采用射频防卫度为无线信道的干扰约束指标,在保证网络连通性的前提下,既降低信道干扰又提高信道利用率.采用虚拟小区分裂方式进一步增加了网络容量也提升了信道分配公平性.仿真结果验证了该策略的有效性.
In order to obtain a wireless mesh network with good user diversity and routing stability, a virtualized hierarchical network architecture is proposed, in which wireless mesh networks converge neighboring nodes into virtual cells, and the interior nodes in the cell not only can communicate directly, but also With the function of routing and forwarding.The connection between nodes in the virtual cell constitutes the virtual bottom layer network and the connection between the virtual cells constitutes the virtual top layer network.To solve the problem of channel resource allocation in the virtualized hierarchical wireless mesh network, Graph coloring model - a generalized set T-coloring model. This model takes the virtual cell as the allocation unit of the radio channel and uses the RF guard degree as the interference constraint indicator of the radio channel. Under the premise of ensuring the network connectivity, the model not only reduces channel interference But also improve the channel utilization.Using virtual cell splitting method to further increase the network capacity also improves the channel allocation fairness.The simulation results verify the effectiveness of the strategy.