5G 卫星集成网络中控制器与网关可靠部署策略

基于SDN架构的5G-卫星集成网络将是提供全球覆盖和宽带通信最有潜力的方案之一.在该集成网络中,控制器和网关的有效部署是提高网络可靠性、降低时延的关键.虽然控制器和网关部署可以独立求解,但控制器与网关部署的紧耦合特性使得联合部署更有现实意义.分析并建模了5G-卫星集成网络中SDN控制器与卫星网关联合部署的问题,提出了一种基于最大化网络可靠性的控制器与网关联合部署策略,设计了基于模拟退火与粒子群的混合算法.仿真结果表明:与枚举算法、双重模拟退火算法(SASA)等现有算法相比,文中提出的算法具有更低的时间复杂性,并将进一步降低了平均控制时延,提高了网络健壮性.

A Reliable Deployment Strategy of Controllers and Gateways in 5G-Satellite Integrated Network

The 5G satellite integrated network based on the SDN architecture will be one of the most promising solutions of global coverage and broadband communications. In this integrated network, the key of effective deployment of controllers and gateways lies in improving network reliability and reducing time delay. Although the deployment of the controller and the gateway can be solved independently, the tightly coupled nature of the deployment of the controller and the gateway makes the joint deployment more realistic. This paper analyzes and models the joint deployment of SDN controllers and satellite gateways in 5G satellite integrated networks, proposes a joint deployment strategy of controllers and gateways based on maximizing network reliability, and designs a mixed algorithm based on simulated annealing and particle swarm Hybrid. The simulation results show that compared with the existing algorithms such as enumeration algorithm and dual simulated annealing algorithm (SASA), the algorithm proposed in this paper has lower time complexity, and further reduces the average control delay and improves the robustness of the network.