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Frequency offset correction method and device of multi-card mobile terminal

A mobile terminal and frequency offset correction technology, which is applied in the communication between multiple stations, electrical components, wireless communication, etc., to achieve the effect of avoiding network disconnection

Active Publication Date: 2013-09-04
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The Chinese patent application with the application number 200710171901.7 discloses a method for finding a network when a dual-card dual-standby mobile phone is turned on, but this solution also does not solve the above problems

Method used

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  • Frequency offset correction method and device of multi-card mobile terminal
  • Frequency offset correction method and device of multi-card mobile terminal
  • Frequency offset correction method and device of multi-card mobile terminal

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Embodiment Construction

[0038] In the multi-card mobile terminal of the prior art, after starting up, each SIM card is locked on its own frequency point after searching for a network, but during the business service process of the business card, such as calls, data transmission, etc., the radio frequency communication module Occupied by the service card for a long time, there will be a frequency offset between the frequency point locked by the non-service card and the actual frequency point of the base station, resulting in out-of-synchronization with the base station or even network loss.

[0039] In the process of receiving service data by the service card, this technical solution receives the synchronization data of the non-service card in the time occupied by the idle frame of the service data, so as to correct the frequency offset of the frequency point locked by the non-service card, so that the service card During the business service process, the non-business card can also maintain synchroniza...

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Abstract

The invention relates to a multi-card mobile terminal and a frequency offset correction method thereof, wherein the frequency offset correction method comprises the steps of receiving business data from business cards, wherein the business data consist of a plurality of frames; monitoring the business data, receiving synchronous data from non-business cards within a period occupied by reserved frames of the service data; and carrying out frequency offset correction on frequency points which are locked by the non-business cards by using the synchronous data. The invention ensures that the non-business cards can be kept in synchronization with base stations during the business service of the business cards.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a frequency offset correction method and device for a multi-card mobile terminal. Background technique [0002] With the rapid development of mobile communication technology, Global System for Mobile communication (GSM, Global System for Mobile communication) network has been widely used. GSM users may have a plurality of numbers, therefore, a large amount of mobile terminal equipments (such as mobile phones) support 2 or more than 2 subscriber identity module (SIM, Subscriber Identity Model) cards simultaneously, in order to satisfy the user's many SIM cards standby simultaneously need. [0003] Existing multi-card mobile terminals can be divided into two types: multi-GSM communication modules, each GSM communication module supports a SIM card, and realizes simultaneous standby of multiple SIM cards, wherein any SIM card can call in and call out, That is, a multi-card multi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W88/02H04B7/26
Inventor 侯庆柱
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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