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Method and system for accelerating cell switching in high-speed vehicle moving environment

A cell handover and high-speed mobile technology, applied in wireless communication, electrical components, etc., can solve the problem of performance degradation of media data streams, achieve the effect of reducing handover delay and improving serious handover lag problems

Active Publication Date: 2011-05-04
MAIPU COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since none of the WLAN standards in the above related table is a mobile communication standard, but a working combination formed by some practical practices of static wireless access, if the terminal mobility is strong, the performance of the media data stream may be significantly reduced

Method used

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  • Method and system for accelerating cell switching in high-speed vehicle moving environment
  • Method and system for accelerating cell switching in high-speed vehicle moving environment
  • Method and system for accelerating cell switching in high-speed vehicle moving environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Vehicle 1 has just entered the signal coverage area I of AP point 6. The vehicle-mounted wireless communication terminal establishes a connection with AP point 6, and sends a request to AP point 6, requesting the information of the neighbor AP point of 6. The neighbor AP point of 6 shown in the figure is AP Points 7, 13, 14, and 15; the vehicle-mounted wireless communication terminal receives the request response information sent by AP point 6, and stores the information of AP points 7, 13, 14, and 15 in the first buffer area, and also saves the information of vehicle 1 The geographic coordinate information of the vehicle is stored in the first buffer area, and the geographic coordinate information of the vehicle is updated in real time. First, according to the above formulas (1) (2) (3) (4) (5), calculate the AP points to be connected to the next hop that is consistent with the moving direction of the vehicle, and select AP points 7, 14, and 15 as candidate AP points. To...

Embodiment 2

[0058] In the high-speed operation of the vehicle, the vehicle-mounted wireless communication terminal stays within the coverage of each AP point for a short period of time. Frequent switching is required during the movement process, and the excessive delay in the switching process will lead to incomplete switching and affect the communication quality. In the present invention, the next hop of distributing information is selected according to the speed of vehicle travel and the number of AP hops that need to be connected:

[0059] Situation 1, if the driving speed of vehicle 1 is lower than the first speed, the vehicle-mounted wireless communication terminal only needs to distribute the information required for handover to the AP point that needs to be connected in the first hop. image 3 The AP points to be connected in the first hop are the AP points 7 and 15 stored in the second cache area, and the AP points 7 and 15 respectively perform identity authentication on the vehicl...

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Abstract

The invention provides a method for accelerating cell switching in a moving environment when a vehicle runs on the road at a high speed. The method comprises the following steps: a vehicle wireless communication terminal obtains information of a neighbor wireless access point (AP) from a currently connected wireless AP and stores the information, obtains own geographical position information and target route according to own global positioning system (GPS) navigation system and computes wireless APs needing to be connected in next hop according to the direction of the target route and the geographical position information in the information of the neighbor wireless AP; and before cell switching, the vehicle wireless communication terminal transmits the information needing to be transmitted during switching to the wireless APs needing to be connected in next hop so as to prepare for switching in advance.

Description

technical field [0001] The invention relates to the field of wireless local area network communication and the field of traffic information, in particular to a technology for accelerating cell switching of a wireless local area network (WLAN) during high-speed vehicle movement. Background technique [0002] With the highly developed highway transportation system, the wireless communication of vehicles in the high-speed environment has become an important research issue at home and abroad. The combination of vehicle wireless communication terminals and roadside ground communication infrastructure can effectively solve the communication problems in high-speed environments. However, the current existing technology, such as the simple neighbor graph information method, has a serious handover hysteresis in fast handover during high-speed mobility due to the large handover delay, resulting in incomplete handover and a serious impact on communication quality. For live streaming bus...

Claims

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Application Information

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IPC IPC(8): H04W36/08
Inventor 孙伟蔡易君
Owner MAIPU COMM TECH CO LTD
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