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A synchronization monitoring method and device of TD-SCDMA terminal

A TD-SCDMA and terminal synchronization technology, which is applied in the field of time division-synchronous code division multiple access terminal synchronization monitoring, can solve the problems of large synchronization deviation and affecting the normal operation of terminals, so as to ensure normal operation, improve reliability and effectiveness Effect

Inactive Publication Date: 2007-12-12
ST ERICSSON SEMICON BEIJING
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Problems solved by technology

When the quality of the signal received by the terminal is relatively poor due to the deterioration of the wireless environment and other reasons, if the synchronization timing adjustment is still performed according to the received signal at this time, it will cause a large synchronization deviation and even affect the normal operation of the terminal

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  • A synchronization monitoring method and device of TD-SCDMA terminal
  • A synchronization monitoring method and device of TD-SCDMA terminal
  • A synchronization monitoring method and device of TD-SCDMA terminal

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Embodiment Construction

[0051] The invention provides a method and device for synchronous monitoring of TD-SCDMA terminals in a TD-SCDMA system, which monitors the current synchronous state of the terminal, and judges whether synchronous timing adjustment can be performed according to the current synchronous state. The present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0052] First, the TD-SCDMA system frame structure is introduced. As shown in Figure 1, the length of a TDMA subframe is 5ms, and each subframe is divided into 7 service time slots (TS0-TS6) and 3 special time slots with a length of 675us. Slots: downlink pilot time slot (DwPTS, Downlink Pilot Time Slot), guard interval (GP) and uplink pilot time slot (UpPTS, Uplink Pilot Time Slot). Among them, TS0 is always allocated to the downlink (DL, Downlink), and TS1 is always allocated to the uplink (UL, Uplink). The downlink synchronization (SYNC-DL) code is locate...

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Abstract

The invention provides a method and device for the synchronies monitoring of TD-SCDMA terminal in TD-SCDMA system, which is used to monitor the synchronies state of TD-SCDMA system. Said method includes: the TD-SCDMA terminal evaluates the channels according to the SYNC-DL code in received TD-SCDMA sub-frame to get the evaluation result of channel, and obtains the evaluation result of real channel from the evaluation result of channel; choose an efficient route which can accord with the desired condition from said evaluation result of real channel, and calculates the ratio between signal power and noise power according to the evaluation result of channel, the evaluation result of real channel, and the efficient route; the TD-SCDMA terminal judges the present state is normal or not according to the ratio between signal power and noise power. Following said method and device, it can improve the reliability and efficiency of synchronies time regulation.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for synchronous monitoring of Time-Division Synchronization Code Division Multiple Access (TD-SCDMA, Time-Division Synchronization Code Division Multiple Access) terminals. Background technique [0002] TD-SCDMA is a time division-synchronous code division multiple access system, and the synchronization accuracy between the terminal and the base station can reach up to 1 / 8 chip accuracy. In order to achieve a relatively high synchronization accuracy and a relatively good synchronization effect, the terminal needs to perform periodic / aperiodic synchronization timing adjustment according to the received signal (or process the received signal, according to the processing result). When the quality of the signal received by the terminal is relatively poor due to the deterioration of the wireless environment and other reasons, if the synchroni...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04B7/216H04B1/707H04W56/00
Inventor 许百成
Owner ST ERICSSON SEMICON BEIJING
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