Method for measuring global system for mobile communications (GSM) neighborhood in time division-synchronous code division multiple access (TD-SCDMA) system

Abstract

The invention discloses a method for measuring a global system for mobile communications (GSM) neighborhood in a time division-synchronous code division multiple access (TD-SCDMA) system. The method is characterized in that: clock synchronization of a GSM neighborhood is acquired by directly searching a supplemental channel (SCH) channel to perform base station identity code (BSIC) verification measurement, wherein the BSIC verification measurement comprises an initial BSIC identification process and a BSIC re-confirmation process; the searched SCH channel is a training sequence for receiving the SCH, and an observation time window and length of the SCH training sequence are arranged in fixed positions in each TD-SCDMA sub-frame; and a GSM neighborhood signal is received by using a first frequency synthesizer, and TD-SCDMA signals are transmitted and received by using a second frequency synthesizer. A low cost scheme with single receiver is adopted in the invention, and the conventional standard or network side implementation is not needed to modify, so that measurement on neighborhood under TD-SCDMA model high speed data service can be well supported.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, in particular to a method for measuring GSM neighboring cells in a TD-SCDMA system. Background technique [0002] GSM (Global System for Mobile communication, Global System for Mobile communication) is the second generation mobile communication system (2G). This system supports voice and low-speed data services, and the network coverage is very extensive. TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division-Synchronous Code Division Multiple Access) is the third generation mobile communication system (3G). Compared with the GSM system, it can provide a higher data transmission rate. At present, large-scale construction is underway in China , but its network coverage is far from reaching the level of the GSM system. In view of this, using GSM network to expand TD-SCDMA network coverage to maintain the continuity of 3G user experience has become a must for ...

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Problems solved by technology

[0013] In addition, there are two practical issues that must be considered: First, TS1, as an uplink time slot, always needs a certain amount of transmission time advance to overcome the influence of propagation delay, so the length of the continuous idle time window will become shorter ; Second, at the time of initial BSIC identification, since the terminal does not know any timing information of the GSM neighboring cell, the terminal needs to continuously receive the GSM signal in the fixed time window of each subframe in order to search for the TDMA frame timing. If this time is to be guaranteed If the window length does not change, the terminal cannot send the UpPCH signal in the UpPTS time slot during the entire search period, which has a great impact and restriction on the HSUPA service

[0014] There is a patent application "Method for Measuring GSM Neighboring Cells by Terminals in TD-SCDMA System", the application number is 200710041000.6, which proposes that the network side schedules the number of TD-SCDMA service time slots used by terminals to allow enough time for GSM neighboring cell measurement , which will have a great impact on the realization of the network and reduce the data throughput of the system

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