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Ad Hoc Networks road traffic safety monitoring system of high - speed data transmission

Author: GuoHongWei
Tutor: LiaoXiChun
School: Wuyi University
Course: Communication and Information System
Keywords: Ad Hoc network Road traffic safe supervisory system Wireless communication network MAC agreement Route agreement
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 11
Quote: 0
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Abstract


Along with society’s development. the traffic control and the security problem increase obviously, needs one kind of new traffic control system anxiously. Road Traffic Safety monitoring system Based on Ad Hoc Networks have the characteristic with Wide area coverage, survivability capability, short construction period, the cost of small, flexible., feature for current needs. Event’s fortuitousness and traffic control system’s function, request system has the very high timeliness and the accuracy. The network data transmission’s speed is this system timely key. the data transmission accurate immediate influence system’s accuracy. However the road safety supervisory system’s main feature is the node moves (vehicles rapid traverse) quickly, the node crowded in certain region, these characteristic of the system serious influence data transmission speed and accuracy. This is this system’s contradiction. The present paper mainly studies MAC protocols and route protocols to Resolve the contradictions above, realizes the data high speed transmission.This system uses the single channel to correspond. Presently, the single channel MAC protocols uses the handshake mechanism majority, for example, the MACA protocols has used the RTS/CTS channel handshake mechanism, the MACAW agreement uses the RTS-CTS-DATA-ACK handshake mechanism, the protocols above application in this system, the time delay question becomes more serious, the handshake defeat’s probability increases greatly. At first. Ad the Hoc network routing algorithm is originates from the computer network routing algorithm thought. Now present many routing algorithm specially used in Ad Hoc network, like DSDV, DSR, AODV and so on, these algorithm’s common drawback of these algorithms is the high time complexity, a large channel bandwidth occupied and so on. did not suit this system.This thesis introduces a time- interval MAC protocol which divide data into several parts and then send one by one, each gap’s time is the same.The MAC protocols sent at the same interval have the advantage of both asynchronous and synchronous communication.greatly reduce the probability of conflict and improve the system’s timeliness,accuracy and speed of data transmission.This thesis introduces automatic grouping multicast routing protocols using automatic vehicle location, vehicle characteristics of a regular mobile, using the new algorithm.automatic grouping multicast routing protocols has the advantages of flooding, but also can only automatical pass data on the road which have the event of emergencies to further improve data transmission speeds, while improving the efficiency of the channel.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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