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Method and user device for solving call restriction between different systems

A technology of call restriction and user equipment, applied in access restriction, wireless communication, electrical components, etc., can solve the problems of call rejection, inability to log in to the TD-SCDMA network, user inconvenience, etc., to ensure user experience and improve retention. success rate effect

Inactive Publication Date: 2010-03-17
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the USIM card inserted into the UE only supports TD mode, it will cause the GSM network to reject the UE’s access; and when the UE returns to an area with good TD signal coverage, although the UE shows that the signal is full, the service is limited, and it can no longer log in to the TD -SCDMA network; at this time, if the user tries to call, the call rejection is displayed on the UE
Therefore, in the TD-SCDMA system, there is a problem of call restriction between different systems. This problem can only be solved by restarting the UE, which greatly reduces the success rate of network residency in the TD-SCDMA system, and at the same time causes great inconvenience to users. Seriously affect the user experience

Method used

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  • Method and user device for solving call restriction between different systems
  • Method and user device for solving call restriction between different systems
  • Method and user device for solving call restriction between different systems

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Embodiment Construction

[0019] The technical solutions provided by the embodiments of the present invention will be described in detail with reference to the drawings in the description.

[0020] First, taking the TD-SCDMA system as an example, the reasons for the call restriction between different systems are analyzed. According to the prior art standard, in the TD-SCDMA system, the PLMN (Public Land Mobile Network, Public Land Mobile Network) value of the GSM network and the PLMN value of the TD-SCDMA network are pre-configured as the equivalent PLMN value in the dual-mode single-standby in UE. If the UE disconnects from the network in TD mode, it will automatically start trying to access the GSM network and send an access request to the GSM network. The network will return a reject reason value to the UE, which may be one of the following reject reason values:

[0021] #2 IMSI Unknown in HLR (unknown international mobile subscriber identity in the home location register);

[0022] #3 Illegal MS...

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Abstract

The invention relates to the field of mobile communication, in particular to a technology for solving call restriction between different systems. The invention discloses a method for solving call restriction between different systems, which is used for improving the resident success ratio of a network. The method comprises the following steps: when receiving an unrecoverable rejection cause valuereturned by a first network according to the access request of the user device, acquiring the indication information of the last resident network; confirming the last resident network according to theindication information, and when the last resident network is a second network, modifying the unrecoverable rejection cause value into a recoverable rejection cause value; and searching the network again according to the recoverable cause value. The invention also discloses the user device.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a technique for solving call restriction between different systems. Background technique [0002] GSM (Global System for Mobile Communication) is the digital mobile communication system with the largest commercial scale and the widest coverage in the world. It is generally called 2G (the 2nd Generation Mobile Communication) system. With the development of technology, the 3G (The 3rd Generation Mobile Communication, third generation mobile communication) system adopting the CDMA (Code Division Multiple Access, code division multiple access) technology has also entered or will enter a commercial stage. The 3G system takes WCDMA (Wideband CDMA), TD-SCDMA (Time Division-Synchronous CDMA) and CDMA2000 as the mainstream technologies. Moreover, 3GPP (3rd Generation Partnership Project, third generation mobile communication standardization organization) has started the standardizati...

Claims

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Application Information

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IPC IPC(8): H04W48/02H04W48/16
Inventor 余立
Owner CHINA MOBILE COMM GRP CO LTD
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