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Method and device for achieving switching between base stations

A technology between base stations and target base stations, which is applied in the field of handover between base stations, and can solve the problems of increased time of voice interruption, handover failure, and degradation of voice quality due to the number of PhyInfo retransmissions.

Active Publication Date: 2014-11-26
COMBA TELECOM SYST CHINA LTD
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  • Abstract
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Problems solved by technology

[0028] To sum up, the success rate of voice handover in the current GSM system is limited by whether the SABM frame sent by the MS is correctly received by BTS2. If the SABM frame is not correctly received by BTS2, BTS2 needs to resend PhyInfo to MS. The number of retransmissions of PhyInfo The increase will increase the time of voice interruption during switching, the voice quality will decrease, and the switching will fail after the number of retransmissions of PhyInfo reaches the upper limit

Method used

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  • Method and device for achieving switching between base stations
  • Method and device for achieving switching between base stations
  • Method and device for achieving switching between base stations

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Embodiment Construction

[0069] The embodiment of the present invention designs a method for handover between base stations, which is used to increase the sending frequency of UA frames when the SABM frame is not received successfully due to poor wireless environment quality or burst interference, which improves the MS The success rate and timeliness of receiving UA frames, while weakening the importance of SABM frames, thereby improving the success rate of voice switching, on the other hand, shortening the time for MS to receive UA frames, thereby reducing the loss of voice frames and improving voice quality.

[0070] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0071] refer to image 3 As shown, in the embodiment of the present invention, when performing handover between base stations, the target base station performs the following operations:

[0072] Step 301: After receiving the handover access request sent by ...

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Abstract

The invention relates to the field of communication and discloses a method and device for achieving switching between base stations. The success rate and the voice quality of switching between the base stations in a GSM system are improved. According to the method, after a target base station receives a switching accessing request sent by an MS, physical information with time lead is fed back to the MS, UA frames are sent to the MS in a periodic mode until Handover Complete information returned by the MS is received, and MS switching success is guaranteed. Accordingly, the target base station can amplify the issuing frequency of the UA frames and increase the success rate and the timeliness of receiving of the UA frames by the MS, meanwhile, the importance of an SABM frame sent by the MS to the target base station is weakened, and switching success rate is improved. The time for the MS to receive the UA frames can be shortened, the processing time for the SABM frame can be removed, accordingly, losing of voice frames is lowered, and voice quality is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for realizing handover between base stations. Background technique [0002] The Global System for Mobile communication (GSM) is currently the most widely used mobile phone standard, and the stability of GSM voice calls has always been an important indicator affecting user experience. [0003] In the prior art, when the user is talking, if the user moves from one cell to another, the mobile station (Mobile Station, MS) needs to switch between the base transceiver stations (Base Transceiver Station, BTS) to complete the serving cell replacement. During the handover process, the degradation of the wireless signal quality or sudden interference will affect the normal progress of the handover, thereby affecting the voice quality of the call. [0004] When the MS performs handover between base stations, it will involve synchronous handover or asynchronous handove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/08
Inventor 阮俊冰
Owner COMBA TELECOM SYST CHINA LTD
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