System and method for implementing speedway vehicle wideband communication

Abstract

The invention relates to the field of wireless network high-speed switching and high bandwidth communication under mobile environment, which aims at solving the technical problem of a system and a method for realizing bandwidth communication between highway vehicles, wherein, the system comprises base stations distributed and installed along the roadsides of highways and on-board wireless communication terminals, which all comply with the WLAN wireless access 802.11a/b/g/p standard, the base stations are connected by optical fibers to form a local area network, the on-board wireless communication terminal is also provided with the global positioning system (GPS) function. The on-board wireless communication equipment can synchronously establish radio links with a plurality of roadside base stations so as to realize the high bandwidth communication, the transmission rate of which is higher than the previous transmission rate by a plurality of times. When passing through the covered areas of different base stations at high speed, the vehicle can adopt the self-adaption rate selection and self-adaption flow method to gradually disconnect the links with gradually weak wireless signals, and establish the new links with gradually strong signals in sequence or in a great-leap-forward mode, thus realizing steady and extremely soft network switch, and ensuring communication continuity. The method supports the high-speed mobility of the vehicle, the multimedia broadband service of the mobile equipment and the large-scale network coverage, and realizes the bandwidth communication of highway vehicles.

Description

technical field [0001] The invention relates to the field of wireless local area network communication and the field of traffic information management, in particular to a system and method for realizing high-speed switching of wireless networks and high-bandwidth communication in a mobile environment. Background technique [0002] With the highly developed highway traffic system, vehicle communication and broadband communication in high-speed environments have become important research issues at home and abroad. Using vehicles as mobile terminals supplemented by roadside base station facilities can effectively solve the problem of broadband communication in highway environments. Among them, the core issues are the rapid switching of roadside base station equipment and the realization of multimedia services with large data volumes. At present, in the fast handover of high-speed mobility, there are serious handover lags and ping-pong effects, resulting in incomplete handover. ...

AI Technical Summary

Problems solved by technology

At present, in the fast handover of high-speed mobility, there are serious handover lags and ping-pong effects, resulting in incomplete handover. Especially in broadband communication, the timing of handover directly affects the quality of communication. Too early or too late handover will cause communication problems. The decline in bandwidth is unbearable for real-time streaming media services; short-distance high-speed wireless communication mostly uses the traditional 802.11a / b protocol wireless local area network, and its 54Mbits / s bandwidth can meet broadband communication, but any version of the WLAN standard IEEE 802.11 / 16 is not a standard for mobile communication, but a working combination formed by some practical practices of static wireless intervention. If the terminal is highly mobile, the performance of media data stream may be significantly reduced

Second, the performance degradation affects all clients in the WLAN, not just the ones that are moving

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