Network access method for state information sequence competition
A state information and network access technology, applied in the field of car networking access and network access, can solve the problems of reducing network communication quality, wireless channel waste, data transmission conflicts, etc., and achieve the effect of improving network throughput and transmission efficiency
Active Publication Date: 2021-08-24
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
Since the nodes in the vehicle ad hoc network share the same frequency spectrum, unreasonable access to the channel by the communication node may cause problems such as data transmission conflicts or waste of wireless channels, reducing the communication quality of the network
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0020] The present invention proposes a vehicle networking access method with state information sequence competition, to image 3 Take the scenario in the example as an example to introduce the detailed steps of this access method.
[0021] The application scenario of the present invention is that in a vehicle-mounted ad hoc network, different vehicle nodes are within the mutual communication range, and the method specifically includes the following steps:
[0022] Step 1: The subgrade node broadcasts its time slot division result, and divides a frame into two phases, the competition phase and the transmission phase.
[0023] Step 2: If image 3 As shown, the three vehicle nodes receive the time slot allocation results of the subgrade nodes, and generate the corresponding state information sequence according to the priority of the information to be se...
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The invention provides a state information sequence competition network access method. According to the method, the advantages of a competition type MAC layer access method and a non-competition type MAC layer access method are combined, and different vehicle nodes in a network compete in a competition stage allocated by the network by adopting different state information sequences aiming at messages with different priorities, so as to reserve the transmission time slots of a transmission stage. In the transmission stage, a time division multiple access mode is adopted, and different vehicle nodes carry out information transmission according to the time slots reserved in the competition stage. According to the invention, the information transmitted among the vehicle nodes is classified, so that the information with high priority is firstly transmitted, the information with low priority is finally transmitted, and the method is more in line with the actual application scene of the vehicle-mounted ad hoc network. Meanwhile, an adaptive adjustment mechanism is introduced, a solution is provided when conflicts occur, and the network throughput and the transmission efficiency are improved.
Description
technical field [0001] The present invention relates to the field of wireless communication MAC layers, in particular to a network access method, specifically a vehicle networking access method. Background technique [0002] Vehicle ad hoc network is a wireless network composed of traffic entities such as vehicles and road infrastructure in the Internet of Vehicles. Based on this, data communication can be directly carried out between cars and cars, cars and roads, and cars and people. Since the nodes in the vehicle ad hoc network share the same frequency spectrum, the unreasonable access of communication nodes to the channel may lead to problems such as data transmission conflicts or waste of wireless channels, and reduce the communication quality of the network. At the same time, the types of road information will have varying degrees of impact on road traffic safety. For example, road safety information directly affects the driving status of vehicles. Compared with other...
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IPC IPC(8): H04W74/08
CPCH04W74/0875
Inventor 杨欣刘娜英陶明亮张兆林谢坚粟嘉王伶汪跃先范一飞韩闯宫延云
Owner NORTHWESTERN POLYTECHNICAL UNIV