负载感知的太赫兹纳米传感网的TDMA协议

Load-aware TDMA Protocol for Terahertz Nanosensor Networks

摘要:

针对基于TSOOK（time spread onoff keying）调制的通信系统存在数据传输连续碰撞的问题，考虑到实际应用场景具备负载不均衡的特点，提出负载感知的TDMA (LATDMA) 协议.该协议根据网络中源节点数目、源节点业务量大小以及太赫兹信道的传输特性，在传统TDMA协议基础上实现动态分配时隙.仿真结果表明：该协议是能量高效的，在时延和平均吞吐量方面均具有明显的优势，因此可以应用于时延要求较苛刻的网络场景中.

Abstract:

A load-aware time division multiple access (LATDMA) protocol is proposed in this paper, by considering the avoidance of symbol collisions in the time spread on-off keying (TSOOK) based communication system combined with load-unbalanced application scenarios. This protocol adopts a dynamic TDMA-based time slot allocation mechanism according to the current number of source nodes, their corresponding traffic and the transmission peculiarities of Terahertz channel. The simulation results show that LATDMA is energy efficient and gains obvious advantages in average end-to-end delay and average throughput, which proves suitable to support low-delay and load-unbalanced wireless nanosensor networks (WNSNs).