一种基于标地分离的卫星网络移动切换管理技术

移动卫星网络因具有覆盖区域广、通信延时低等优势受到广泛关注,当前有大量研究旨在开发IP协议的组网技术,并将其与地面IP网络融合。融合网络的挑战之一,即为卫星移动性,用户在卫星网络中的接入点频繁切换导致移动管理问题,而现有的移动IP技术不能高效支持卫星网络移动切换。为了高效支持移动切换,在卫星网络中应用标地分离思想,在标地分离的架构下研究切换管理问题;用映射服务系统对终端进行位置管理,在移动切换中由新接入卫星网关和终端的标志为主要信息在原卫星中形成通告转发表。仿真结果表明,相对移动IP技术,该方法有明显优势。将其应用于卫星网络时可以降低切换延时,减少大量的绑定更新开销或是次优路由,提升系统的性能和可扩展性。

A satellite network mobility handover management scheme based on locator/identifier separation

Mobile satellite networks receive extensive attention due to their wide geographical coverage, low communication delay and other advantages. Tremendous research efforts on the development of IP protocol networking technology have been made, and researchers strive to integrate it with terrestrial IP networks. One of the challenges of the converged network is the constant moving of the satellite. Frequent handover of satellite access causes complex mobile management issues. Existing IP mobility management technologies cannot effectively support mobile satellite network handover. In order to efficiently support mobile handover, we introduce the idea of locator/identifier separation into satellite networks, and study handover management issues in the locator/identifier separation architecture. We manage the terminal location through the mapping service system, and make a forwarding table in the previous satellite via the new satellite gateway and the terminal's identifier to handle the mobility handover management. Simulation results show that the proposed scheme outperforms the mobile IPv4 technology. It cannot only lower the handover latency and reduce binding update overhead or sub optimal routing, but also improve system performance and scalability in satellite networks.