一种高吞吐量低时延的太赫兹无线个域网MAC协议

High throughput and low delay MAC protocol for terahertz wireless personal area networks

现有MAC协议在设计时未考虑太赫兹无线链路的衰减特性,难以稳定工作从而影响网络性能。针对此问题,提出一种适用于太赫兹无线个域网环境的高吞吐量低时延MAC协议HTLD-MAC(high throughput and low delay MAC protocol for terahertz wireless personal area networks)。HTLD-MAC协议通过采用基于信道质量预留时隙机制以及自适应确认机制,能够合理分配超帧时隙资源、提高网络吞吐量,降低数据时延。仿真表明相较于IEEE 802.15.3c和ES-MAC协议,HTLD-MAC在太赫兹链路质量较差情况下具有更好的网络性能。

The terahertz wireless link has a greater signal attenuation , how ever, the related MAC protocols h a ve n 51 concernedth is characteristics when de sig ning , so they cannot w ork stably and have a poor perform ance in the terahertz wireless personalarea n e tw o rk s (T-WPANs ) environm ent. To address th is p ro b le m , this paper proposed a high throug hpu t and low delay MACp ro to co l(HTLD-MAC) fo r T-WPAN s. B y ad opting the reserved slots m echanism based on channel q u a lity and the adaptivelydynam ic acknowledgem ent m echanism , HTLD-MAC could allocate the slot resource reasonably, im proved the netw ork throughpu t and reduced the data latency. The sim ulation results show that com paring w ith the IEEE 802. 15. 3c and the ES-MAC,HTLD-MAC has be tter netw ork perform ance in poor terahertz lin k q u a lity.