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传统的包冲突解析(PCR)方案一般采用抛弃重传策略,平均容量较低。文中基于虚拟多入多出(V-MIMO)技术,提出了一种新的PCR方案。该方案通过选择协同节点构建等效并行通道,可提供多包接收能力,进而方便地解决包冲突问题。同时提出了两类协同节点选择算法,并对方案最大平均归一化容量及节点最佳发送概率进行了理论分析和推导。仿真结果表明,文中所提PCR方案与传统方案及其它同类方案相比,可获得显著的性能提升。
The traditional package conflict resolution (PCR) scheme generally adopts the abandonment retransmission strategy, and the average capacity is lower. In this paper, a new PCR scheme is proposed based on the virtual multi-input and multi-output (V-MIMO) technology. This scheme chooses the cooperative node to construct the equivalent parallel channel, which can provide multi-packet receiving capability and then solve the packet collision problem conveniently. At the same time, two kinds of cooperative node selection algorithms are proposed, and the theoretical analysis and deduction of the maximum average normalized capacity and the optimal node sending probability are carried out. The simulation results show that the proposed PCR scheme in the paper can achieve significant performance improvement compared with the traditional scheme and other similar schemes.