面向应用的车载自组织网络跨层多信道MAC协议

doi:10.11959/j.issn.1000-436x.2016097

Abstract

Abstract:

An application oriented cross-layer multi-channel(AOCM)MAC protocol was proposed for VANET.The AOCM protocol could derive the optimal control channel(CCH)interval to ensure the timely and reliable transmission of safety messages on the CCH,based on real-time statistics and prediction for different types of sages coming from upper application layer.In the service channels(SCH),the proposed protocol relies on a reservation mechanism for con-tention-free transmission,so as to improve the throughput of SCH.The proposed protocol was suitable for both saturation and unsaturation conditions,and has low computational complexity and high scalability.Extensive simulation results demonstrate the superiority of the AOCM protocol compared with other existing protocols.

Key words: vehicular ad-hoc network, multi-channel MAC, variable control channel interval, network traffic statistics, cross-layer

Cai-xia SONG,Guo-zhen TAN,Nan DING,Jun-ling BU,Fu-xin ZHANG,Ming-jian LIU. Application oriented cross-layer multi-channel MAC protocol for VANET[J]. Journal on Communications, 2016, 37(5): 95-105.

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References 22

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参数名称	参数值
通信传输范围/m	250
控制信道数目	1
服务信道数目	4
每信道上数据传输速率/Mbit·s^-1	6
车辆密度范围	10～100
传输功率、接收功率阈值、本底噪声功率/dBm	16,-96,-98
默认CCH周期、SCH周期和保护间隙/ms	50,50,4
MAC层分组头大小/bit	256
PHY层分组头大小/bit	192
ACK大小/bit	112
safety大小/byte	200
Beacon大小/byte	400
WSA大小/byte	20
服务数据分组大小/byte	2 000
传播时间d/μs	1
DIFS时间/μs	128
SIFS时间/μs	28
系统参数a、b	1.3,1.2

Application oriented cross-layer multi-channel MAC protocol for VANET

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