Method and device for reducing turn-on delay of circuit domain fallback redirection

Abstract

The present invention relates to the field of communication technology, and in particular to a method and device for reducing connection delay of circuit domain fallback redirection. The information includes the location area code of the LTE cell; read the redirection cell list according to the indication information; judge the redirection that best matches the LTE cell according to the signal strength and location area code of the cells in the redirection cell list Cell; redirecting to the most matching redirected cell, the present invention compares the location area code of the redirected cell and the location area code of the LTE cell when falling back, and preferentially selects the redirected cell with the same location area code to fall back, Try to avoid the location update after the mobile terminal falls back, reduce the connection delay of the circuit domain fallback redirection, and reduce the connection failure rate caused by the failure of the location update.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for reducing connection delay of circuit domain fallback redirection. Background technique [0002] In the prior art, the mobile communication operator's voice protocol stipulates that when the mobile phone falls back to the redirected cell in LTE (Long Term Evolution) CSFB (Circuit Switched Fallback, Circuit Switched Fallback), if the cell selected by the mobile phone is LAC (Location Area Code, When the location area code) is different from the LTE cell, it is necessary to update the location first, and then continue the call after the location update is completed; in many places in the real network, the MTRF (Mean Time to Repair Fault) function stipulated in the agreement has not been implemented. , so that some networks will release network resources after the location update is completed, resulting in CSFB call failure. In addition, in orde...

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Problems solved by technology

[0002] In the prior art, the mobile communication operator's voice protocol stipulates that when the mobile phone falls back to the redirected cell in LTE (Long Term Evolution) CSFB (Circuit Switched Fallback, Circuit Switched Fallback), if the cell selected by the mobile phone is LAC (Location Area Code, When the location area code) is different from the LTE cell, it is necessary to update the location first, and then continue the call after the location update is completed; in many places in the real network, the MTRF (Mean Time to Repair Fault) function stipulated in the agreement has not been implemented. , so that some networks will release network resources after the location update is completed, resulting in CSFB call failure. In addition, in order to increase the success rate of mobile phone CSFB fallback in the real network, the operator will add all the redirected cells in the surrounding area to the LTE adjacent area. , this will cause cells with the same LAC and different LACs to be in the LTE adjacent area. During the CSFB process, the mobile phone will select the redirected cell with the best signal to fall back by default. When the redirected cell LAC selected by the mobile phone is different from the LAC of the LTE cell At the same time, the mobile phone needs to add a location update process, which increases the delay of the entire call connection

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