Mobile terminal, method and device for detecting FCCH (Frequency Correction Channel) frame

Abstract

The invention discloses a mobile terminal, a method and device for detecting an FCCH (Frequency Correction Channel) frame. The method for detecting the FCCH frame comprises the steps of: receiving data of a GSM (Global System for Mobile Communication) subframe by using an idle time slot of a TD-SCDMA (Time Division Synchronous Code Division Multiple Access) subframe; carrying out FCCH frame detection on the received data of the GSM subframe; if the data of the GSM subframe, received by using the idle time slot of the current TD-SCDMA subframe, is data of a first FCCH fame in a GSM51 multiframe, obtaining effective data of the FCCH frame based on the data of the first FCCH frame and the data of the FCCH frame, received by using the idle clearance of the TD-SCDMA subframe with a fixed interval. The technical scheme of the invention aims at increasing the probability of successfully detecting the FCCH frame by the mobile terminal, reaches 100 percent detection success, and makes other dual-mode operations in parallel while making the FCCH frame detection, thereby increasing working efficiency inside the mobile terminal.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a mobile terminal and a method and device for detecting FCCH (Frequency Correction Channel, Frequency Correction Channel) frames thereof. Background technique [0002] With the gradual maturity of the third-generation mobile communication technology, compared with the second-generation mobile communication system, its efficient spectrum efficiency, higher service quality and security performance, and support for high-speed services make the third-generation mobile communication system be promoted rapidly. However, the network coverage of the current third-generation mobile communication network is not comprehensive enough. Therefore, a mobile terminal that can support both the third-generation mobile communication technology and multiple cards can better solve this problem. At present, dual-mode mobile phones mainly support TD-SCDMA (Time Division-Synchronous Co...

AI Technical Summary

Problems solved by technology

But such a detection method needs to consume a lot of time, and when there are only two consecutive idle time slots in the TD-SCDMA subframe to detect the FCCH frame of the GSM system, according to the difference of the FCCH frame position relative to the TD-SCDMA frame, there will be There is a certain probability that a complete FCCH frame will never be successfully detected

[0006] On the other hand, the detection of the existing FCCH frame will occupy all the free time slots of the TD-SCDMA subframe, so that the RSSI measurement of the GSM system and other tasks such as the base station identification check cannot be performed on the TD-SCDMA side at the same time. These tasks must It can only be carried out after the FCCH frame detection is completed, which reduces the efficiency of the mobile terminal to process information

[0007] Referring to the patent application with the Chinese patent application number 200910077153.5, it discloses a measurement scheduling method when the mobile terminal works in the TD-SCDMA network mode, but it also does not solve the existing technical problems

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