A method for alleviating control channel synchronization conflict
A control channel and channel technology, applied in the field of network communication, can solve problems such as the inability to guarantee CCH channel QoS, synchronization conflicts at the beginning of time slots, and impact on traffic safety, so as to alleviate channel synchronization conflicts, alleviate synchronization conflicts, and avoid competing channels Effect
Active Publication Date: 2019-03-01
NANJING XINWANG COMM SCI & TECH CO LTD
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Problems solved by technology
If these packets cannot be managed effectively, it is very easy to cause a synchronization conflict at the beginning of the time slot, so that the QoS of the CCH channel cannot be guaranteed. In severe cases, it may also cause network congestion and affect traffic safety.
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] like figure 1 As shown, the present invention provides a method for alleviating control channel synchronization conflicts in the multi-channel transmission of the vehicle ad hoc network. The method optimizes and improves the control channel transmission mechanism for multi-channel transmission in the original IEEE1609. Adapt to the channel load distribution algorithm, so that nodes can decide whether to send messages immediately according to the current channel conditions, so as to effectively alleviate channel conflicts and reduce message collisions.
[0026] Whenever a new transmission slot is entered, the channel first needs to be initialized. The main work completed during the initialization period is switching of physical channels and timing synchronization. This period is called the guard interval GI of the system. In GI, the physical channel i...
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The invention discloses a method for alleviating a synchronization conflict of a control channel. The method is applied to vehicular ad-hoc network multi-channel transmission to alleviate the synchronization conflict of the control channel. A variety of messages transmitted on the control channel are divided according to the priority; and a transmission mechanism of the control channel is clarified and improved to ensure that a safe message is transmitted with priority and to reduce the collision and message packet loss in the message transmission process, thereby effectively alleviating the synchronization conflict. When the node density in the network is too high, the synchronization conflict problem becomes more serious; therefore, the invention further provides an adaptive channel load distribution algorithm; the node can determine whether to transmit messages immediately via the algorithm according to the current channel load status; the more serious the channel congestion is, the less the number of the nodes having the transmission chance is; the collision and the conflict between the messages can be relatively alleviated. The performance of the method in aspects of the acceptance rate and the average transmission delay of the messages are improved.
Description
technical field [0001] The invention relates to a control channel synchronization conflict mitigation method in a multi-channel transmission mechanism of a MAC layer of a vehicle-mounted self-organizing network, and belongs to the technical field of network communication. Background technique [0002] As one of the popular development directions of the Internet of Things technology, the Internet of Vehicles can realize the information exchange between vehicles, roads and people, achieve a series of purposes such as alleviating traffic congestion, reducing traffic accidents, improving travel conditions, and finally realizing a smart transportation system. (Intelligent Transportation System, ITS). As the basic part of ITS, the vehicle ad hoc network can realize vehicle-to-vehicle (Vehicle to Vehicle, V2V) communication and vehicle-to-infrastructure (Vehicle to Infrastructure, V2I) communication in motion. VANET can provide two types of applications for vehicles: safety applic...
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IPC IPC(8): H04W28/02H04W74/08
CPCH04W28/0289H04W74/0816
Inventor 赵海涛唐紫浩张伟刘南杰
Owner NANJING XINWANG COMM SCI & TECH CO LTD