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Quasi-periodic handoff triggering mechanism based on handoff invitation sending

A handover and trigger mechanism technology, applied in electrical components, wireless communication, etc., can solve problems such as occupying too many communication resources

Inactive Publication Date: 2015-06-10
HOHAI UNIV CHANGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] To make every high-speed mobile UE that needs handover receive the invitation on time, the sending range of the handover invitation should be expanded, but too large a range will occupy too many communication resources

Method used

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  • Quasi-periodic handoff triggering mechanism based on handoff invitation sending
  • Quasi-periodic handoff triggering mechanism based on handoff invitation sending
  • Quasi-periodic handoff triggering mechanism based on handoff invitation sending

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0056] Assume that the wireless mobile communication environment between the bus on-board information unit (OBU) and the roadside unit (RSU) is as follows: figure 1 As shown, the roadside unit (RSU) is a UMTS base station, and the antenna height of the base station is h b =150m, operating frequency f=2100MHz, transmission power is 20W, the distance between the base stations is 3km, each cell base station is connected with the radio network controller (RNC) by wired channel, for simplifying the graph structure, figure 1 The RNC is not shown in the figure, and the construction of the cell cluster and the estimation of the basic period or quasi-period for sending the handover invitation involved i...

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Abstract

The invention discloses a quasi-periodic handoff triggering mechanism based on handoff invitation sending. The quasi-periodic handoff triggering mechanism based on handoff invitation sending comprises, according to the mobile line diagram and the moving speed of a mobile terminal as well as the localization information of the base station of a serving cell and the base station of a neighboring cell to structure a cell cluster and to determine the reference time, the basic period and the quasi-period for transmitting handoff invitation; transmitting the handoff invitation to the mobile terminal periodically through every substation in the cell cluster and accordingly triggering handoff. The quasi-periodic handoff triggering mechanism based on handoff invitation sending overcomes the shortcomings of traditional handoff triggering mechanisms based on signal strength receiving and enables handoff triggering to be timely, accurate and reliable, and meanwhile, shortens the executing time for handoff, improves the handoff speed and efficiency and avoids ping-pong handoff, thereby having a broad application prospect in wireless communication environments with relatively fixed mobile lines and relatively high moving speed such as high-speed railways, highways, urban BRT (bus rapid transit) and the like.

Description

technical field [0001] The present invention relates to the technical field of intelligent transportation and wireless mobile communication, in particular to the information exchange technology between the on-vehicle network and the wireless network access point beside the road when the bus is running, that is, a quasi-periodic handover trigger mechanism based on sending a handover invitation. Background technique [0002] With the rapid development of mobile communication and wireless network technology, the development of IPTS (Intelligent Public Transport System) is getting faster and faster, especially the recent application of Bus Rapid Transit (BRT) system. As we all know, public transport vehicles are the main means of transportation for the general public, so the bus network is an indispensable and important content in the construction of a modern city. In the construction of smart cities, in addition to assisting safe driving and improving traffic efficiency, bus ne...

Claims

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Application Information

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IPC IPC(8): H04W36/26
Inventor 康桂华康鸿博潘坤贝张凤
Owner HOHAI UNIV CHANGZHOU
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