Synchronization method and device after terminal dormancy awaken of TD_SCDMA mobile phone

A TD-SCDMA and synchronization device technology, which is applied in the field of synchronization between the TD-SCDMA mobile phone terminal and the base station after being awakened from sleep, can solve the problems that the channel or channel impulse response is difficult to be distinguished quickly and the synchronization performance is affected

Active Publication Date: 2007-05-23
LEADCORE TECH
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Problems solved by technology

Therefore, the channel impulse response calculated according to the training sequence of the midamble code is actually composed of the shifted and superimposed channel impulse responses of different channels. Due to the limitation of the characteristics of the midamble code, the channel impulse response calculated by the midamble code is actually Contains the channel impulse responses of multiple channels and multiple users. When the channel impulse responses of these different channel...

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  • Synchronization method and device after terminal dormancy awaken of TD_SCDMA mobile phone
  • Synchronization method and device after terminal dormancy awaken of TD_SCDMA mobile phone
  • Synchronization method and device after terminal dormancy awaken of TD_SCDMA mobile phone

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail

[0040]In order to better illustrate the present invention, a brief description of the frame structure of TD-SCDMA is given first. The TD-SCDMA standard has a unique frame structure at the physical layer. Each frame has two uplink and downlink transition points. Ts0 is the downlink time slot, Ts1 is the uplink time slot, and there are three special time slots: G, Dwpts, and Uppts. TD-SCDMA divides each radio frame into two 5ms subframes. Each subframe consists of 7 main time slots (length 675μs) and 3 special time slots: downlink pilot time slot (Dwpts), downlink pilot time slot (Uppts) and guard time slot (G). There are 7 business time slots in a subframe in total, except that time slot Ts0 must be used for downlink and time slot Ts1 must be used for uplink, and the directions of other time slots can be changed. Dwpts and Uppts correspond ...

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Abstract

The invention relates to a method for making TD-SCDMA mobile phone and base station synchronously, wherein it comprises that: receiving descending guide time-slit data sent from receiving base station; matching said received data with local data, to obtain the peak position of time-slit data in signal channel; calculating out the difference between peak position and ideal synchronous position; based on said difference, confirming the synchronous time difference between mobile phone and base station; based on said time difference, adjusting the initial position when receiving next frame, to be synchronous with base station. The invention also provides relative synchronous device, which comprises receiver, matcher, calculator, corrector, and synchronous unit.

Description

technical field [0001] The invention relates to a synchronization technology between a terminal and a base station in the field of mobile communication, in particular to a method and a device for synchronizing a TD-SCDMA mobile phone terminal with a base station after being awakened from sleep. Background technique [0002] In the TD-SCDMA mobile communication system, the mobile phone terminal needs to improve the standby time of the whole terminal by reducing the power consumption of the terminal. The mobile terminal completes the measurement and monitoring tasks in the idle state without receiving and sending messages, which is what we often call the standby state. And there will be a lot of idle time between measurement and monitoring, in order to achieve the purpose of power saving, make the processor enter the sleep state during these idle time. [0003] However, after a long period of sleep, the terminal and the base station will lose contact and synchronization due t...

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Application Information

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IPC IPC(8): H04B7/26
Inventor 施晓琼龙红星
Owner LEADCORE TECH
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