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For the problem of communication delay caused by the interference of the communication channel in the process of vehicle-road cooperative V2X communication, this paper proposed a V2X delay attack protection technology based on game theory. With the signal-to-noise ratio as the measurement index of communication quality, this paper firstly studied the function relationship between the transmission power of the attacking node and the signal-to-noise ratio to obtain the function relationship between the transmission power of the legitimate node and the attacking node, then this functional relationship was brought into the relationship between transmission power of legitimate node and the signal-to-noise ratio. This function also considered the probability of signal transmission, the probability of being detected and the transmission interference of other nodes to obtain the target function. Finally, the proposed protection technology is verified by simulation and test. The results show that by adjusting the transmission power of the nodes, it can effectively resist the attacker’s interference on the V2X communication channel and reduce the communication delay.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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