Multi-card terminal frame synchronization method and structure thereof

Abstract

The invention discloses a multi-card terminal frame synchronization method and a structure thereof. According to a network mode supported by a terminal, a frame timer is arranged for each mode; periodic counting is carried out according to a subframe length and a timing precision of each of the mode; and a comparator is distributed to each SIM card in each of the mode; when an SIM card stays at a cell of any of the mode, on the basis of an intra-frame deviant of the cell, a comparison parameter is arranged for a comparator that is corresponded to the SIM card in the mode; the comparator carries out comparison on a frame timer counting value of the corresponded mode and the comparison parameter; and when the frame timer counting value and the comparison parameter are consistent to each other, frame interruption is triggered for the corresponded SIM card and thus frame synchronization between the SIM card and the network side is completed. During the whole synchronization process, it is unnecessary to modify the intra-frame deflection of the frame timer; so, no matter how many SIM cards are simultaneously supported by the terminal, each network mode can share a frame timer; therefore, it is unnecessary to use a plurality of sets of radio frequency chips or a plurality of sets of frame timers to realize frame synchronization of a plurality of SIM cards, so that energy consumption and manufacturing costs of the multi-card terminal are reduced.

Description

Technical field [0001] The present invention relates to the field of wireless communication, in particular to frame synchronization technology in wireless communication. Background technique [0002] With the development of mobile communication technology, voice services are gradually being replaced by data services, from the second generation (2G") mobile communication network to the third generation (3rd Generation, "3G") mobile communication network Transition will be the current development trend of the telecommunications industry. The emergence of dual-mode and even multi-mode wireless phones is a product of the smooth transition of the mobile communication industry from 2G networks to 3G networks. It means that the 3G process will be gradual and can be gradually cultivated and improved in operation. [0003] The so-called dual-mode mobile phone refers to a mobile phone that can arbitrarily choose to use two distinct mobile networks through a Subscriber Identification Module ...

AI Technical Summary

Problems solved by technology

[0014] 1. The two cards supported by the terminal must belong to the same operator

[0015] 2. The two cards supported by the terminal must be in the same network mode at the same time

[0017] In the first case, the two cards belong to the same operator, and the restrictions on users are too rigid, which is very inconvenient for users

In the second case, although the user can insert two SIM cards of different operators, the terminal restricts that the two SIM cards must be in the same network mode at the same time, which requires that the two SIM cards of the user must be dual-mode cards. If one of them is a single-mode card, such as a GSM single-mode card, the GSM single-mode card cannot be used when the user uses TD-SCDMA network services, which also brings great inconvenience to the user.

However, in order to keep both SIM cards powered on, the battery must supply power to the two sets of chips, which inevitably increases power consumption compared to single-card phones.

Moreover, the higher prices of baseband and radio frequency chips will undoubtedly increase the cost of terminals using the above technologies

[0020] Specifically, if a set of baseband + radio frequency chips is used for frame synchronization of a dual-card dual-standby mobile terminal, when the two cards reside in the same mode, since there is only one frame timer in one mode, relying on the above-mentioned frame timing The maintenance method cannot provide frame timing for two cards at the same time; when the two cards reside in different modes and are set to dual-mode automatic mode, mode switching may occur at any time, and it may be that only one card switches modes, and the other Zhang still resides in the original mode, and the mode switching method of the prior art needs to start the frame timer of another mode at a certain time, but the frame timer of another mode is still maintaining another SIM card at this moment. frame timing, once restarted, the other SIM will go offline due to frame timing loss

It can be seen that the frame synchronization method using a set of baseband + RF chip cannot simultaneously perform frame timing for dual-card dual-standby mobile terminals

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