多类型异构无线网络连通性研究

Research on Connectivity of Multi-Type Heterogeneous Wireless Networks

从渗流角度研究大规模单类型用户和多类型用户的自组织异构网络的连通性问题。首先,从布尔模型的角度出发,对于单类型用户,以圆盘模型分析簇分布时满足渗流的条件;对于多类型用户节点,根据泊松分布的认知无线电模型,从理论上给出具有多类型次用户节点的网络连通性的必要条件。其中,多类型次用户节点之间通信链路的存在与否不仅取决于它们之间的距离,也跟周围邻居用户节点的类型和收发行为有关。然后,从随机连接角度,引入乘积规则决定先连接哪两个用户,从而推迟或加速渗流发生。仿真有效地验证了渗流理论的实用性,可作为对认知无线电网络部署的指导。

For the large scale Ad Hoc network with single-type or multi-type users, the percolation-based connectivity problem was addressed. Firstly, from the Boolean model point of view, single-type and multi-type user network connectivity was analyzed. For the single-type users, the sufficient condition under which percolation was achieved in clustered networks was formulated under the disk model. For multi-type user network, under the Poisson distributed cognitive radio model, the necessary condition for network connectivity was analyzed. The existence of a communication link between two secondary users depends on not only the distance between them, the transmitting and receiving activities of nearby primary users, but also the neighboring user＇s type. Then from random connection model point of view, the product rule was introduced to decide which two users could be connected, thus delaying or accelerating the occurrence of percolation. Various simulations show that the percolation is effective both in theory and practice in guidance of the deployment of cognitive radio network.