基于多包接收的物理网络编码协同通信研究

Multi-packet reception based OPNCC in wireless networks

针对一个簇内部或者簇之间的多个点对点通信的应用场景,提出了一种基于多包接收的随机物理网络编码协同通信技术。在MPR-OPNCC中采用了物理网络编码(PNC)和多包接收(MPR)机制,使得多个源节点能够在同一个时隙中进行广播,且目的节点能够从干扰的信号中检测出所要接收的数据。此外,MPR-OPNCC也是一种随机通信机制,中继节点能够根据目的节点的反馈信息判断是否需要协同传输。从分析结果看出,MPR-OPNCC与ONCC相比具有相同的系统中断概率性能,但在系统的频谱效率方面要高一倍。

In this paper, we propose a multi-packet reception based opportunistic physical network-coded cooperation （MPR- OPNCC） scheme suitable for multiple unieast transmissions in a single-cell or inter-cell wireless network. MPR-OPNCC adopts physical network-coding （PNC） and multi-packet reception（MPR） technology, which enable multiple source nodes to transmit at the same time slot and the destination nodes to detect their wanted data from the interfered signal. Meanwhile, MPR-OPNCC is also an opportunistic communication scheme. With the limited feedback from the destinations; the relay node can decide whether to do cooperation or not. The analytical and numerical resuhs show that, compared with opportunistic network-coded eooperation（ONCC）, MPR-OPNCC provides a similar system outage probability while doubling spectral efficiency.