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Method and apparatus for implementing coarse synchronization of TD-SCDMA system, sub-procedure of coarse synchronization

A TD-SCDMA, coarse synchronization technology, applied in the direction of synchronization devices, electrical components, wireless communication, etc., can solve the problem that there are no specific specifications and standards for TD-SCDMA system measurement, and achieve the effect of reducing the required time

Active Publication Date: 2013-01-09
LEADCORE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] When the multi-mode terminal is in the idle state, it is relatively easy to realize the measurement of the TD-SCDMA system, but there are no specific specifications and standards for the measurement of the TD-SCDMA system in the GSM / GPRS connection mode.

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  • Method and apparatus for implementing coarse synchronization of TD-SCDMA system, sub-procedure of coarse synchronization
  • Method and apparatus for implementing coarse synchronization of TD-SCDMA system, sub-procedure of coarse synchronization
  • Method and apparatus for implementing coarse synchronization of TD-SCDMA system, sub-procedure of coarse synchronization

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Embodiment Construction

[0055] The present invention provides a method and device for realizing coarse synchronization and coarse synchronization sub-process of TD-SCDMA system in the GSM / GPRS connection mode, receiving TD-SCDMA subframes through idle windows in service frames to realize coarse synchronization, wherein, The idle window refers to one or more continuous idle time slots at a fixed position in the service frame; and, the present invention also combines receiving TD-SCDMA by "idle frame and idle time slot" on the basis of the above method Sub-frame, coarse synchronization, so as to perform multiple coarse synchronizations in a 26-multiframe, reduce the time required for the coarse synchronization sub-process in TD-SCDMA system measurement in GSM / GPRS connection mode, and improve the speed of TD-SCDMA system measurement . The present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0056] According to the frame struc...

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Abstract

The invention provides a method for realizing TD-SCDMA system coarse synchronization under a GSM / GPRS system connecting mode and a device thereof. The method comprises: firstly, receiving a TD-SCDMA sub frame through an idle frame in a service frame by a terminal under the GSM / GPRS system connecting mode until receiving data which at least comprises chips on all positions in the TD-SCDMA sub frame, wherein the idle window is one or a plurality of continuous idle time slots on fixed positions in the service frame, secondly, calculating the characteristic window ratio by the terminal according to the chips of the received TD-SCDMA sub frame, and determining the position of an obtained downlink synchronization code SYNC DL of the coarse synchronizing according to the position of the least characteristic window, wherein the least characteristic window refers to the characteristic window with the least characteristic window ratio in the coarse synchronizing. According to the method and thedevice of the invention, the TD-SCDMA system coarse synchronizing of receiving the TD-SCDMA sub frame data through a GSM / GPRS idle window can be realized, and the time of TD-SCDMA system coarse synchronizing sub process can be greatly reduced.

Description

technical field [0001] The present invention relates to the synchronous technology of Time Division Synchronous Code Division Multiple Access (TD-SCDMA, Time Division-Synchronous CDMA) system, be specifically related to a kind of realize TD-SCDMA under the connection mode of Global Mobile Communication / General Radio Packet Service System (GSM / GPRS) A method and device for system coarse synchronization and coarse synchronization sub-processes. Background technique [0002] The physical channel of TD-SCDMA adopts four-layer structure: system frame number, wireless frame, subframe and time slot / code. Such as figure 1 As shown, the length of a TDMA wireless frame is 10ms, which is divided into two 5ms subframes, and each subframe includes 7 regular time slots (Ts0-Ts6) and 3 special time slots with a length of 675us: downlink pilot time slot (DwPTS, Downlink Pilot Time Slot), a guard interval (GP) of 96 chips, and an uplink pilot time slot (UpPTS, Uplink Pilot Time Slot), wher...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W88/06
Inventor 陈丽萍
Owner LEADCORE TECH