车载自组织网络中RSU协调的多信道MAC协议

doi:10.11959/j.issn.1000-436x.2018233

Journal on Communications ›› 2018, Vol. 39 ›› Issue (11): 10-22.doi: 10.11959/j.issn.1000-436x.2018233

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RSU-coordinated multichannel MAC protocol in vehicular ad hoc network

Caixia SONG^1,²(),Guozhen TAN¹,Nan DING¹

¹ College of Computer Science and Technology,Dalian University of Technology,Dalian 116024,China
² College of Science and Information,Qingdao Agricultural University,Qingdao 266109,China

Revised:2018-05-16 Online:2018-11-01 Published:2018-12-10
Supported by:
The National High Technology Research and Development Program of China (863 Program)(2012AA111902-2);The National Natural Science Foundation of China(61471084);The Central University Basic Business Expenses Special Funding for Scientific Research Project(DUT15QY02);Online Research Fund of Ministry of Education Research Center for Online Education(2017YB135);Project of Shandong Province Higher Educational Science and Technology Program(J17KA154);Project of Shandong Province Higher Educational Science and Technology Program(XJP2013032);Project of Shandong Province Higher Educational Science and Technology Program(XJG2016056);Project of Shandong Province Feature Prestigious Construction-College Quality Course(SYJK16-13);Experimental Technology Research Project of Qingdao Agricultural University

Abstract

Abstract:

A road side unit (RSU)-coordinated multichannel media access control (MAC) (RMM) protocol was proposed in vehicular ad hoc network,which aimed to improve the transmission efficiency of non-safety messages.Under the coordination of RSU,nodes had more opportunities to make SCH reservations on control channel,and the contention-free message transmissions were thus realized.The proposed RMM protocol could use the service channel during the whole synchronization interval for non-safety message transmissions,and thus the saturated network throughput and channel utilization were improved,and the transmission delay was reduced.Compared with other existing protocols,extensive analysis and simulation results demonstrate the superiority of the RMM protocol.

Key words: vehicular ad hoc networks, multichannel MAC, road side unit, throughput and delay, channel utilization, synchronous transmission

CLC Number:

TP393

Caixia SONG,Guozhen TAN,Nan DING. RSU-coordinated multichannel MAC protocol in vehicular ad hoc network[J]. Journal on Communications, 2018, 39(11): 10-22.

Figures/Tables 9

References 22

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SCH	可用的时隙
1	1，5，7
2	2，6，8
3	1，3，4
4	3，5，8
5	3，6
6	2，4，7

参数	值
CCH数量	1
SCH数量(N_sch)	6
每条信道数据传输速率(R_d)/(Mbit·s^?1)	6
RSU覆盖范围(R)/m	300,500
每方向车道数(M)	2
信道带宽/MHz	10
车辆密度(β)/(vehicles·m^?1)	0.02~0.3
车速([V_min,V_max])/(km·h^?1)	60,100],[80,120]
W₀	32
m'	5
m	10
MAC头大小/ bit	256
PHY头大小/ bit	192
WSA/RFS分组负载(L_wsa/L_rfs)/bit	216+PHY header
ACK分组负载(L_ack)/ bit	128 +PHY header
SIFS长度(T_sifs)/ μs	10
DIFS长度(T_difs)/ μs	50
空闲时隙长度(σ)/μs	20
传播时延(δ)/μs	1
传输一个CLI分组时间(T_CLI)/ ms	0.8
传输一个RRTS分组时间(t_rrts)/μs	60
传输一个CP时间(T_cp)/μs	100
传输一个安全相关数据分组的时间(T_saslot)/ms	0.4
安全消息的发送频率/Hz	10
非安全分组负载(L_data)/B	1 000,3 000
安全分组大小/ B	200

RSU-coordinated multichannel MAC protocol in vehicular ad hoc network

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