C-V2X网联环境下应急优先的绿灯补偿模型研究

doi:10.11959/j.issn.1000-0801.2024003

Abstract

Abstract:

To reduce the impact of the emergency vehicle preemption strategy on vehicles in non-priority phases at intersections, an emergency preemption green light compensation model in C-V2X environment was proposed.The proposed model doesn’t affect the emergency vehicle preemption strategy.The green time of the non-priority phases was calculated according to the real-time traffic demand to minimize the adverse impact on vehicles in non-priority phases.The proposed model was verified with simulation using an emergency vehicle.The results demonstrate that the proposed method can effectively decrease the queue lengths and reduce the average delay in non-priority phases after applying the emergency vehicle preemption strategy.The proposed method can improve traffic efficiency by optimizing the signal timing after the emergency vehicle passes through an intersection.

Key words: emergency vehicle preemption, C-V2X, non-priority phase, green light compensation, queue length

CLC Number:

TP393

Changlong ZHANG, Farong HAN, Jimin WEI, Jingang DAI, Xiaodong YANG, Shibo QU. Research on green light compensation model for emergency preemption in C-V2X environment[J]. Telecommunications Science, 2024, 40(1): 59-70.

Figures/Tables 12

References 29

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统计次数编号	统计时间间隔/s	每次统计间隔新增排队车辆数	每次统计间隔驶离车辆数	每次统计间隔的累计排队车辆数（IQA）	每次统计间隔的累计延误（IQA×Δ）
1	0～2	1	0	1	2	红灯开始
2	2～4	1	0	2	4
3	4～6	1	0	3	6
4	6～8	1	0	4	8
5	8～10	1	0	5	10
6	10～12	1	0	6	12
7	12～14	1	2	5	10	绿灯开始
8	14～16	1	2	4	8
9	16～18	1	2	3	6
10	18～20	1	2	2	4
11	20～22	1	2	1	2
12	22～24	1	2	0	0
	合计	12	12	36	72

参数名称	参数取值
种群大小	50
进化次数	300
交叉概率	0.8
生成函数	Uniform Distribution
选择函数	Stochastic Uniform Selection
交叉函数	Scattered Crossover
变异函数	Adaptive Feasible Mutation

序号	v/c=0.7		v/c=0.8		v/c=0.9		v/c=1.0
序号	EVP-NC	EVP-DC	EVP-NC	EVP-DC	EVP-NC	EVP-DC	EVP-NC	EVP-DC
1	52.05	38.86	57.30	45.26	67.90	55.75	67.23	57.13
2	56.00	45.55	59.00	53.56	62.53	43.23	69.61	62.33
3	50.70	39.30	49.54	44.70	63.35	62.00	66.44	65.80
4	61.60	40.67	61.93	56.32	68.35	55.28	67.13	58.40
5	49.92	43.75	56.23	45.61	57.62	39.80	73.15	79.50
6	42.76	47.85	60.98	48.02	57.17	56.74	64.36	68.42
7	56.95	48.15	64.28	52.64	65.27	51.07	67.05	54.40
均值	52.85	43.45	58.47	49.44	63.17	51.98	67.85	63.71
优化	↓17.79%		↓15.43%		↓17.71%		↓6.11%

Research on green light compensation model for emergency preemption in C-V2X environment

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