A novel MAC protocol for IDMA‐based multi‐beam satellite communication systems
A novel MAC protocol for IDMA‐based multi‐beam satellite communication systems
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DOI：
10.1002/dac.2597
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发表时间：
2014-12
影响因子：
2.1
通讯作者：
Xin Ge;Gongliang Liu;Victor C. M. Leung;Naitong Zhang
中科院分区：
文献类型：
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作者：
Xin Ge;Gongliang Liu;Victor C. M. Leung;Naitong Zhang
考虑到卫星通信系统的局限性和新兴的交织分多址(IDMA)技术的优势，IDMA被引入到卫星系统中，为卫星系统的多址技术提供了新的解决方案。为了进一步验证卫星系统中的 IDMA，提出了一种新颖的媒体访问控制（MAC）方案。在随机接入信道中，采用交织分时隙ALOHA方法来缓解接入请求的冲突。此外，提出了一种基于信号与干扰加噪声比（SINR）演化的新型最小功率分配方案，以最大化此类干扰敏感系统的容量。借助SINR演化，我们提出的方案可以以较低的计算成本准确估计多用户检测效率，并进一步降低发射功率，说明了IDMA的高功率效率。为了进一步增强MAC协议的性能，设计了一种考虑功率控制误差影响的有效呼叫准入控制方案并将其结合到我们的MAC协议中。分析和仿真结果表明，通过充分利用逐芯片多用户检测技术，所提出的IDMA MAC协议在多波束卫星通信系统中同时实现了高吞吐量和低平均分组延迟，且星上处理复杂度低。版权所有 © 2013 约翰·威利父子有限公司
Considering the limitations of satellite communication systems and advantages of new emerging interleave‐division multiple access (IDMA) technology, IDMA is introduced into the satellite systems, providing a new solution for multiple access techniques of satellite systems. To further validate the IDMA into satellite systems, a novel medium access control (MAC) scheme is proposed. In the random access channel, the interleave‐division slotted ALOHA method is adopted to alleviate the collision of access requests. Furthermore, a novel minimum power allocation scheme based on signal‐to‐interference‐plus‐noise ratio (SINR) evolution is proposed to maximize the capacity of such an interference‐sensitive system. By virtue of SINR evolution, our proposed scheme can accurately estimate multi‐user detection efficiency with low computational cost and further reduce the transmitted power, illustrating the high power efficiency of IDMA. To further enhance the performance of the MAC protocol, an effective call admission control scheme considering the effect of power control error is designed and combined into our MAC protocol. Analysis and simulation results show that, by taking full advantage of the chip‐by‐chip multi‐user detection technique, the proposed IDMA MAC protocol achieves high throughput and low average packet delay simultaneously, with low onboard processing complexity in the multi‐beam satellite communication systems. Copyright © 2013 John Wiley & Sons, Ltd.