基于中继卫星SMA的用户网络接入技术

Space Network Access Technology Based on TDRS SMA

针对中继卫星各类型及大量用户的接入需求,设计了网络分级管理架构和动态/静态相结合的多码-多频-时分多址(MC-MF-TDMA)资源分配技术。利用网络分级管理架构,低层子网用户以自组织的方式通过高层骨干节点转接入S频段多址系统(SMA)波束,以增强网络的扩展能力,缓解多用户对SMA资源的过度消耗;利用动态/静态相结合的MC-MF-TDMA资源分配技术,延长时隙长度,提高用户数据速率的灵活性。OPNET仿真表明,网络结构和资源分配策略合理可行,可为中继卫星实现对陆、海、空、天各类用户在线管理提供技术支持。

To meet accessing demand on tracking and data relay satellite of different type of user terminal and a large number of users,the paper designs a layered network management architecture and a MC-MF-TDMA resource distribution technology combining dynamic and static distribution.With the layered network management architecture,the low level sub-network users accesses to SMA in Ad-hoc approach to enhance the expandability of the network and alleviate the excessive consumptions of SMA resources by multiple users;by using MC-MF-TDMA resource distribution technology combining dynamic and static distribution,the paper realizes the extension of slot time and enhances the flexibility of data rate.OPNET simulation shows,the network architecture and resource distribution strategy is reasonable and practicable,able to provide technical support for tracking and data relay satellite in realizing online management of various territorial,marine,space and aerial users.