A Routing Method Based on Content Integrity and Geographic Intersections in Vehicle Ad Hoc Networks
A self-organizing network and integrity technology, applied in the field of communication, can solve problems such as easy failure and waste of bandwidth
Inactive Publication Date: 2017-11-24
西电(日照)创业园管理有限公司
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- Description
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a vehicle ad hoc network that can improve the success rate of content file transmission and reduce the waste of bandwidth resources in view of the problem that the transmission of content files in the vehicle ad hoc network is prone to failure and wastes bandwidth. Routing Method Based on Content Integrity and Geographic Intersection
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[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0046] Step 1. Each node in the vehicle ad hoc network constructs its own HELLO group and periodically broadcasts its own HELLO group:
[0047] 1a), each node in the vehicle self-organizing network obtains the three-dimensional coordinate information (x, y, z) of its own position, speed information v, and acceleration information a from its own GPS receiver and electronic map;
[0048] 1b), each node in the vehicle self-organizing network constructs its own HELLO group, and the information contained in the HELLO group includes: the ID number of the node, the three-dimensional coordinate information (x, y, z) of the node position, and the speed information of the node v and the acceleration information a of the node;
[0049] Table 1 Structure of HELLO packet
[0050] ID
x
y
z
v
a
[0051] Step 2. After receiving the HELLO packe...
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The invention relates to a routing method in a vehicular ad hoc network based on content integrality and geographic crossroads. The method is characterized in that (1) nodes in periodic HELLO grouping are received, and the information amount A transmitted by a current node i to an adjacent node j is calculated; (2) a node required to transmit a file data package transmits the data package to the adjacent crossroad nearest to a target node, then, the adjacent crossroad decides that the data package is transmitted to nodes on which road segment, the next hop node is selected to judge whether the target node meeting the requirement that A is larger than or equal to Fs exists in a neighbor list of the node or not, if the target node meeting the requirement that A is larger than or equal to Fs exists in the neighbor list of the node, the data package is sent to the target node, if not, whether an adjacent node which meets the requirement that the A is larger than or equal to Fs and is closest to the destination exists or not continues to be judged, and the data package is sent to the adjacent node; the node which receives the file data package firstly judges whether the node is the target node or not, and if not, the next hop node is selected. Compared with the prior art, when the next hop node is selected, the integrality of successful transmission of a content file is fully considered, and it is ensured that in the multi-hop transmission process, the content file can be integrally transmitted.
Description
technical field [0001] The invention belongs to the technical field of communication, and mainly relates to a routing method for content integrity and geographic crossings in a vehicle ad hoc network. Background technique [0002] Vehicular Ad Hoc Network (hereinafter referred to as VANET) is a wireless node or router that converts moving vehicles into mobile, and uses short-distance wireless communication between vehicles to form a large-scale wireless ad hoc network. In VANET, communication between vehicle devices is realized through forwarding between vehicle devices. VANET has its advantages: powerful hardware devices and predictable node locations, but it also has its disadvantages, namely high dynamic changes in network topology, unstable link quality, and uneven distribution of nodes. In order to improve the safety and convenience of vehicle travel, VANET requires the mutual communication between long-distance vehicle equipment. However, due to the limited wireless ...
Claims
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IPC IPC(8): H04W8/00H04W40/02H04W40/24
CPCY02D30/70
Inventor 李长乐韩晓磊宋月阳雷艳乐郭超
Owner 西电(日照)创业园管理有限公司