摘要
研究了基于虚拟多入多出(V-MIMO)技术通过选择协同节点构建等效并行通道来解决随机接入方式无线网络中包冲突问题的包冲突解析(PCR)方案 ALLIANCES 及其改进型的性能特点。在此基础上,针对该类方案的性能分析不全面、理论模型不完备、适用范围受限等问题,建立了 PCR 方案的一种普适的理论分析模型,设计了一种新的节点选择算法,进而构成了一种低复杂度的 PCR 方案,并对该方案的丢包率、误码率、等效吞吐量等性能进行了理论分析和仿真。结果表明,该方案的性能与改进的 ALLLANCES 方案非常接近,由于该方案复杂度较低,因此更具实用价值。
The performance features of the ALLIANCES, a recently proposed packet collision resolution （PCR） scheme based on the virtual MIMO technique for dealing with random access wireless networks＇ packet collisions by selecting cooperative nodes to form virtual parallel channels, and its improved scheme, were studied thoroughly. And in view of the problems of the schemes, e.g., the performance analysis is not complete, the theoretic analytic model is not universal and their application fields are narrow, a kind of universal theoretic analytic model was established, a new cooperative node selection algorithm was given, and a low-complexity PCR scheme was formed. The performance of the given scheme in terms of packet loss rate, bit errors rate and equivalent throughput was theoretically analyzed and experimentally simulated. The results showed that the performance of the proposed scheme was close to that of the improved ALLIANCES. Compared with the improved ALLIANCES, the proposed scheme is more practical because of its lower complexity.
出处
《高技术通讯》
CAS
CSCD
北大核心
2008年第10期1004-1010,共7页
Chinese High Technology Letters
基金
国家自然科学基金(60672079)
江苏省自然科学基金(BK2006701)
关键词
包冲突解析
虚拟多入多出
协同通信
协同节点选择
packet collision resolution, virtual MIMO, cooperative communication, cooperative node selection
