• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Aerospace and Electronic Systems >Resource Allocation in Space Multiaccess Systems
【24h】

Resource Allocation in Space Multiaccess Systems

机译：空间多路访问系统中的资源分配

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Currently, most Landsat satellites are deployed in the low earth orbit (LEO) to obtain high-resolution data of the Earth surface and atmosphere. However, the return channels of LEO satellites are unstable and discontinuous intrinsically, resulting from the high orbital velocity, long revisit interval, and limited ranges of ground-based radar receivers. Space-based information networks, in which data can be delivered by the cooperative transmission of relay satellites, can greatly expand the spatial transport connection ranges of LEO satellites. While different types of these relay satellites deployed in orbits of different altitudes represent distinctive performances when they are participating in forwarding. In this paper, we consider the cooperative mechanism of relay satellites deployed in the geosynchronous orbit (GEO) and LEO according to their different transport performances and orbital characteristics. To take full advantage of the transmission resource of different kinds of cooperative relays, we propose a multiple access and bandwidth resource allocation strategy for GEO relay, in which the relay can receive and transmit simultaneously according to channel characteristics of space-based systems. Moreover, a time-slot allocation strategy that is based on the slotted time division multiple access is introduced for the system with LEO relays. Based on the queueing theoretic formulation, the stability of the proposed systems and protocols is analyzed and the maximum stable throughput region is derived as well, which provides the guidance for the design of the system optimal control. Simulation results exhibit multiple factors that affect the stable throughput and verify the theoretical analysis.
机译：当前，大多数Landsat卫星都部署在低地球轨道（LEO）中，以获取地球表面和大气的高分辨率数据。但是，由于轨道速度高，重访间隔长以及地面雷达接收机的射程有限，导致LEO卫星的返回通道本质上不稳定且不连续。可以通过中继卫星的协作传输来传递数据的天基信息网络可以极大地扩展LEO卫星的空间传输连接范围。当部署在不同高度的轨道上的不同类型的这些中继卫星在参与转发时表现出与众不同的性能。本文根据地球同步轨道（GEO）和低轨道轨道（LEO）的不同传输性能和轨道特性，考虑了中继卫星的协同机制。为了充分利用不同种类的协作中继的传输资源，我们提出了一种GEO中继的多址和带宽资源分配策略，该中继可以根据空基系统的信道特性同时收发。此外，针对具有LEO中继的系统，引入了基于时隙时分多址的时隙分配策略。基于排队论，对所提出的系统和协议的稳定性进行了分析，并推导了最大稳定吞吐量区域，为系统最优控制的设计提供了指导。仿真结果显示出影响稳定吞吐量的多种因素，并验证了理论分析。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号