VANET/LTE-Advanced异构网络中基于协议序列-IEEE 802.11p的信道接入机制

doi:10.11959/j.issn.1000-0801.2015235

Abstract

Abstract:

Abstract: VANET／LTE-Advanced heterogeneous network was proposed by combining LTE-Advanced with VANET. The utilization of channel and channel access mode was reconfigured in order to improve the system performance. Aiming at the V2V communication, the performance of channel access mechanism based on IEEE 802.11p and protocol sequence were analyzed and compared with each other. And then, protocol sequence-IEEE 802.11p based channel access mechanism was proposed, which combines the scheduling-based and competition-based mechanism to completing the standard of IEEE 802.11p. Through simulation with MATLAB, it shows that protocol sequence-IEEE 802.11p based channel access mechanism can tradeoff the performance between UI-based and IEEE 802.11p-based ones in user average throughput and average packet delay, which has important theory meaning and practical value.

Key words: VANET, LTE-Advanced, heterogeneous network, protocol sequence, channel access

Zhexin Xu,Lingling Cai,Xiao Lin,Yi Wu. Protocol Sequence-IEEE 802.11p Based Channel Access Mechanism in VANET/LTE-Advanced Heterogeneous Network[J]. Telecommunications Science, 2015, 31(9): 66-72.

Figures/Tables 6

References 19

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参数	数值
信道比特率/（Mbit·s^-1）	3、4.5、6、9、12、18、24、27
传播时延/μs	1
时隙长度/μs	13
SIFS/μs	32
DIFS/μs	15
CW_min	7
重传次数限制/次	58
PHY头部/bit	192
MAC头部/bit	272
CTS大小/bit	112+PHY头部
RTS大小/bit	160+PHY头部
ACK大小/bit	112+PHY头部
数据分组大小/bit	0～4 095
CW_max	1 023

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Protocol Sequence-IEEE 802.11p Based Channel Access Mechanism in VANET/LTE-Advanced Heterogeneous Network

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References 19

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