多信道跳频网络的协议序列性能研究

A Research on Protocol Sequence Performance of Multichannel Frequency Network

协议序列主要用于为Massey提出的无反馈冲突信道提供信道接入机制,它通过不同序列值指定各用户的发送时刻,并借助良好的汉明互相关特性保障网络性能。基于中国余数定理构造的CRT序列作为协议序列的一个重要子集,其吞吐率以及延迟性能仅在单信道网络中被广泛研究。论文以多信道跳频通信网络为研究背景,探讨CRT序列如何应用于跳频网络,并对其吞吐率及延迟性能作了仿真分析。仿真结果表明,CRT序列的平均吞吐率性能与随机接入机制一致,但在最差吞吐量、平均时延以及最差时延方面具有性能优势。

Protocol sequences are used in the channel access for the collision channel without feedback proposed by Massey.In a protocol-sequence-based scheme,each user determines when to transmit by sequentially reading out the entries from the as-signed protocol sequence,and thus enjoys some performance guarantee benefitting from the property of Hamming cross-correla-tions. As an important class of protocol sequences,CRT sequences are constructed based on the Chinese Reminder Theorem,andtheir throughput,delay performance has been extensively investigated in single-channel networks. This thesis focuses onmulti-channel frequency hopping communication networks,and analyzes how to modify CRT sequences to support multi-channelnetworks. Simulation results show that the CRT sequences outperform the Aloha scheme in terms of the worst-case throughout,aver-age delay and the worst-case delay,but enjoy the same average throughput performance.