多业务交织多址接入(IDMA)通信系统的连接接纳控制方法

A Call Admission Control Method for Multi-service IDMA Systems

作为第四代移动通信关键技术之一的交织多址接入(IDMA)技术受到了很大关注。连接接纳控制(CAC)技术是其无线资源管理中必不可少的组成部分,针对现有的CAC方法均是建立在TDMA和CDMA系统上,并且不适用于IDMA系统的研究现状,提出了一种基于SINR改进技术的接纳控制方法(SE-CAC),该方法的关键就是将基于IDMA系统的逐码片(CBC)迭代多用户检测技术(MUD)的系统性能分析方法 SINR Evolution技术应用到接纳判决的过程中,在精确预测MUD对系统性能影响的同时,简化了算法的复杂度。IDMA的研究动机正是其对抗小区内部多址干扰的高效率,因此,SE-CAC方法非常适合应用于IDMA系统。仿真结果表明,和传统的近似MUD效率为固定常数的CAC方法相比较,本文的SE-CAC方法保证了IDMA系统具有更高的吞吐量和功率利用率,并且在重负载情况下,IDMA性能优势更为明显,充分显示了IDMA-CBC MUD的高效率。

As one of the key technologies of the fourth generation mobile communication interleavedivision multiple access （IDMA） technology did a lot of attention. Call admission control （CAC） technology is the essential part of its wireless resource management, in view of the existing methods of CAC is based on TDMA and CDMA system, and does not apply to the research status of IDMA system, an improved technology is put forward based on SINR evolution-based call admission control method （SE-CAC）. Key of this method is based on the IDMA system by chips （CBC） iterative multi-user detection technology （MUD）, system performance analysis method of SINR evolution technology applied to the acceptance of the process of judgment, in accurately predict MUD influence on the performance of the system at the same time, simplify the complexity of the algorithm. IDMA study motive is efficiently against of the living area of multiple access interference, therefore, SE-CAC method is very suitable for application in the IDMA system. Simulation results show that with the traditional approximate MUD efficiency as a fixed constant, in comparison with the method of CAC of this SE-CAC method ensures the IDMA system has higher throughput and power efficiency, and under the condition of heavy load, IDMA performance advantage is more apparent, fully shows the IDMA-CBC MUD high efficiency.