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Network-based navigation assisted fast three-layer switching method in V2I communication

A technology of navigation assistance and layer switching, applied in the field of mobile communication, can solve the problems of not defining APID, not defining how to detect handover, and unavailability of access signals, so as to facilitate system implementation, reduce handover delay and packet loss rate, and improve The effect of reliability

Inactive Publication Date: 2012-11-14
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, it does not define how to detect the arrival of handover nor how to know the new AP ID; secondly, it stipulates that handover detection is determined by the access technology, making it unavailable when the access signal cannot be obtained, and only supports continuous cell coverage Happening

Method used

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  • Network-based navigation assisted fast three-layer switching method in V2I communication
  • Network-based navigation assisted fast three-layer switching method in V2I communication
  • Network-based navigation assisted fast three-layer switching method in V2I communication

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Experimental program
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specific Embodiment approach

[0084] 1. Offline stage

[0085] The main task in the offline phase is to add the location and network address information of each RSU on the basis of the existing navigation map, and determine the pre-handover trigger distance according to the IEEE 802.11p communication range (300-1000m).

[0086] 2. Online stage

[0087] Once the offline phase is complete, the online phase can be implemented. The online phase can be subdivided into the preparation phase and the fast switching phase. Its specific implementation process is as follows:

[0088] 1) Preparation stage

[0089] (a) The vehicle is started, and the navigation system plans the driving route from the starting point to the ending point, and at the same time determines the RSU distribution along the way.

[0090] (b) The vehicle navigation system periodically calculates the distance from the vehicle to the PRSU.

[0091] 2) Fast switching stage

[0092] (a) When the distance between the vehicle and the PRSU reaches...

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Abstract

The invention relates to a network-based navigation assisted fast three-layer switching method, which is used for communication between vehicles and roadside infrastructures. The method comprises the following steps of: planning driving directions by using a navigation system, and determining roadside units passed throughout a journey; periodically acquiring distances between the vehicles and theroadside units by using the navigation system; determining the roadside units of the next jump according to the driving directions when the distances reach pre-switching triggering distances; performing related operation of the three-layer switching in advance, and establishing a backup route; and immediately starting the backup route after two-layer switching is finished. The method is convenient for system implementation, further accelerates the switching, reduces error probability of pre-switching, reduces switching delay and packet loss rate and can simultaneously support cell continuity and cell discontinuity.

Description

technical field [0001] The invention expands the functions of the vehicle navigation system, and proposes a fast three-layer switching method based on the network side, which belongs to the field of mobile communication, especially the network layer switching problem in the vehicle and roadside infrastructure (V2I) wireless communication system. Background technique [0002] After nearly 20 years of development, the Vehicular Ad Hoc Network (VANET) has received widespread attention from all over the world, and its application has become increasingly popular. As an important part of it, vehicle-to-road infrastructure (V2I) communication can provide the public with services such as real-time traffic information, Internet access, and weather forecasts through the information interaction between vehicles and roadside facilities. Driving comfort and other aspects play an important role. These applications are usually delay-sensitive, and to ensure their reliability, fast Interne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/18H04W36/32H04W40/20H04L12/56H04L29/06H04L12/773
Inventor 卢恒惠陈霁张盛秦博林孝康
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV