一种具有自适应功率控制和载波感知的信道保留MAC协议

Yunjie Yuan, Bo Li, Zhongjiang Yan
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引用次数: 6

摘要

在车载自组织网络(VANET)中,无线信道是一种多维资源,涉及时间、频率、空间、代码等多个方面。本文提出了一种新的信道保留介质访问控制(MAC)协议,即a - ccrm协议,该协议可以在时域和空域共同保留信道资源。在A-CCRM中,根据实时业务量的周期性计算信道保留时段,并结合功率控制和载波感知技术对信道保留空间进行调整。此外,为了提高信道保留的稳定性,广播的信道保留信息由发射机的相邻节点协同转发。仿真结果表明,与其他基于信道保留机制的MAC协议相比,A-CCRM在吞吐量、能效和丢包率等方面具有更好的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Cooperative Channel Reservation MAC Protocol with Adaptive Power Control and Carrier Sensing
In Vehicular Ad hoc Networks (VANET), wireless channel is a multidimensional resource, involved in time, frequency, space, code and etc. In this paper, a novel channel reservation Medium Access Control (MAC) protocol, called A-CCRM, is proposed to jointly reserve the channel resource in both time domain and space domain. In A-CCRM, the channel reservation time period is computed according to the periodicity of real-time traffics, and the channel reservation space is adjusted by jointly using the techniques of both power control and carrier sensing. Moreover, in order to improve the stability of channel reservation, the annouced channel reservation information is cooperatively relayed by the neighboring nodes of the transmitter. Simulation results show that compared with other MAC protocols based on channel reservation mechanisms, A-CCRM performs better in terms of throughput, energy efficiency and packet lost rate.
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