太赫兹无线局域网媒体访问控制协议的优化设计

针对太赫兹无线局域网络,为满足网络中对数据传输性能的要求,提出一种媒体访问控制(medium access control,MAC)层协议超帧结构,在新超帧结构的基础上,进一步提出3种优化机制,分别是自适应动态调整竞争接入时段的长度、合并申请量的免申请预分配时隙和删除冗余控制字段。通过采用OPNET仿真软件,对新提出的优化后的MAC层协议进行了仿真验证,并将仿真结果与现有的能够应用于太赫兹超高速无线网络的高吞吐量低时延MAC(high throughput low delay MAC,HLMAC)协议和IEEE 802.15.3c标准协议进行了比较。仿真结果表明，所提的MAC协议相较于HLMAC协议和IEEE 802.15.3c标准协议在网络吞吐量方面的性能得到了约3.45%和11.11%的优化提升,在平均接入时延方面的性能提升了约28%和50%,而在数据帧的传送成功率方面的性能也得到了约3.3%和10.6%的提升效果。

Optimization of medium access control protocol of terahertz wireless local area networks#br#

In Terahertz wireless local area networks, to fulfill the request of data transmission efficiency, a superframe structure of medium access control (MAC) protocol is proposed. Based on the proposed superframe structure, three optimization mechanisms are further proposed, which are dynamically adjusting the length of contention access period, slots distribution without further sending slots requests and deleting redundancy control bits. By applying the network simulator software OPNET, the performance of the proposed optimized MAC protocol is compared with the existed high throughput low delay MAC (HLMAC)〖JP〗 protocol as well as the standard IEEE 802.15.3c protocol. From the perspective of network throughput, the proposed optimized MAC protocol is about 3.45% and 11.11% better than the HLMAC protocol and the standard protocol. In the view point of average access delay, around 28% and 50% improvements are obtained. And the probability of data frame transmission gains about 3.3% and 10.6% than that of the HLMAC and the standard protocol.