Multichannel MAC protocol implementation method in service-intensive type vehicle-mounted network

A vehicle-mounted network and protocol implementation technology, applied in multiplexing communication, time-division multiplexing system, multiple use of transmission paths, etc., can solve problems such as increased equipment production costs, inability to perform cluster heads, and service data exchange , to achieve the effect of increasing throughput, reducing production cost, and reliable transmission

Active Publication Date: 2015-12-02
XIAMEN UNIV
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Problems solved by technology

Since this method uses two antennas, the performance of the system is reliably guaranteed, but the production cost of the equipment is also relatively increased
At the same time,

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  • Multichannel MAC protocol implementation method in service-intensive type vehicle-mounted network
  • Multichannel MAC protocol implementation method in service-intensive type vehicle-mounted network
  • Multichannel MAC protocol implementation method in service-intensive type vehicle-mounted network

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Embodiment Construction

[0029] In order to understand the present invention more clearly, the content of the present invention will be described in detail through the following embodiments in conjunction with the accompanying drawings of the present invention.

[0030] figure 1 The channel division scheme in this embodiment is given. In this embodiment, each synchronization interval is divided into 100 time slots, wherein CCHI and SCHI each occupy 50 time slots. In addition, in the CCHI interval, the RP length is 45 time slots, and the CBP length is 5 time slots. Vehicles in the network reserve corresponding time slots in RP and CBP according to their own status. When the vehicle is a CM, only one time slot is reserved in the RP for sending safety / service request messages; when the vehicle is a CH, one time slot is reserved in the RP phase for broadcasting cluster management information, and at the same time in the CBP A time slot is reserved in the phase for broadcasting the consolidated safety / s...

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Abstract

The invention discloses a multichannel MAC protocol implementation method in a service-intensive type vehicle-mounted network, and belongs to the field of vehicle-mounted wireless communication. The method comprises the steps: distributing a DS-ALOHA control channel access protocol and a service channel time slot, wherein the DS-ALOHA control channel access protocol employs a TDMA mechanism; introducing the concept of cluster; collecting and transmitting safety information through the cluster, thereby enabling the safety information in the network to be transmitted safely in real time; meanwhile, distributing the access of a service channel through the cluster, thereby reducing the collision among nodes, and improving the utilization rate of a business channel. The method just needs to use a single antenna to achieve the multi-channel communication, and more effectively uses wireless channel resources. Meanwhile, compared with a multi-antenna scheme, the method reduces the production cost, and reduces the energy consumption caused by the detection of safety information. The method can guarantee the reliable transmission of the safety information under the service intensive network, and improves the throughput of the system for the service information.

Description

technical field [0001] The invention belongs to the field of vehicle-mounted wireless communication, and relates to a MAC protocol, in particular to a multi-channel MAC protocol realization method in a service-intensive vehicle-mounted network. Background technique [0002] Vehicular ad hoc network is a special application of traditional mobile ad hoc network in the field of road traffic. Vehicles on the road can communicate with other vehicles or roadside units (RSU), so that the vehicles on the road form a wireless distribution network. style network. Vehicular ad hoc network is an effective method to solve traffic safety problems, and it is an important application in intelligent transportation system. In the vehicle self-organizing network, vehicles provide a safer and more comfortable driving environment for people by sharing their speed, location and other safety-related information. [0003] As a special mobile ad hoc network, the vehicular network has characteristi...

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Application Information

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IPC IPC(8): H04J3/16H04L5/00H04L29/08
Inventor 汤子楠王建新宋胜曦杨佩芝张杨宪
Owner XIAMEN UNIV
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