无线网络中基于网络编码的重传机制
发布时间：2018-10-22 18:55
【摘要】：鉴于目前网络编码在单跳无线网络重传中的应用研究都是基于单发-多收场景的局限性,提出一种应用于多发-多收无线网络中的重传机制NCWRM。该重传机制中,网络节点既可以是发送方也可以是接收方,节点发送的数据包在直传和第一次重传中都失败后,第二次重传时广播发送由多个丢失数据包编码组合得到的编码包。多个接收方通过解码编码包得到丢失的数据包,从而实现一次重传获得多个丢失的数据包,可以有效提高重传效率。理论分析和仿真结果表明,NCWRM算法能够明显提高系统的饱和吞吐量,同时减小开销及丢包率。
[Abstract]:In view of the fact that the current research of network coding in single hop wireless network retransmission is based on the limitation of single transmit and multiple receiving scenario, this paper proposes a retransmission mechanism NCWRM. which is applied in multi-receiver wireless network. In this retransmission mechanism, the network node can be either the sender or the receiver, and the packet sent by the node fails after both the direct transmission and the first retransmission. On a second retransmission, the broadcast transmits an encoded packet obtained from a plurality of lost packet encoding combinations. The multiple receivers obtain the lost packets by decoding the encoded packets, so as to achieve a single retransmission to obtain multiple lost packets, which can effectively improve the efficiency of the retransmission. Theoretical analysis and simulation results show that the NCWRM algorithm can significantly improve the saturation throughput of the system, while reducing the cost and packet loss rate.
【作者单位】： 重庆邮电大学移动通信技术重点实验室;通信抗干扰国家级重点实验室(电子科技大学);
【基金】：国家自然科学基金资助项目(61071118,60702055) 重庆市教委科研项目(KJ111506,KJ110524)
【分类号】：TN92
[Abstract]:In view of the fact that the current research of network coding in single hop wireless network retransmission is based on the limitation of single transmit and multiple receiving scenario, this paper proposes a retransmission mechanism NCWRM. which is applied in multi-receiver wireless network. In this retransmission mechanism, the network node can be either the sender or the receiver, and the packet sent by the node fails after both the direct transmission and the first retransmission. On a second retransmission, the broadcast transmits an encoded packet obtained from a plurality of lost packet encoding combinations. The multiple receivers obtain the lost packets by decoding the encoded packets, so as to achieve a single retransmission to obtain multiple lost packets, which can effectively improve the efficiency of the retransmission. Theoretical analysis and simulation results show that the NCWRM algorithm can significantly improve the saturation throughput of the system, while reducing the cost and packet loss rate.
【作者单位】： 重庆邮电大学移动通信技术重点实验室;通信抗干扰国家级重点实验室(电子科技大学);
【基金】：国家自然科学基金资助项目(61071118,60702055) 重庆市教委科研项目(KJ111506,KJ110524)
【分类号】：TN92
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5 赵，
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