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A multi-mode terminal system clock timing method and device

A system clock, multi-mode terminal technology, applied in the direction of synchronization device, communication between multiple stations, electrical components, etc.

Active Publication Date: 2016-08-03
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention is to provide a multi-mode terminal system clock timing method and device that solves the independent timing of each mode

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  • A multi-mode terminal system clock timing method and device
  • A multi-mode terminal system clock timing method and device
  • A multi-mode terminal system clock timing method and device

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Embodiment Construction

[0073] In order to make the purpose, technical solution and advantages of the present invention clearer, a multi-mode terminal system clock timing method and device of the present invention will be further described in detail in conjunction with the accompanying drawings and embodiments below, and some known implementation methods will not be described in detail. to avoid unnecessary confusion with the content of the present invention.

[0074] A kind of multimode terminal system clock timing method of the present invention, such as figure 1 shown, including:

[0075] Step A: Determine the timing accuracy of TD system and LTE system

[0076] The timing unit of the TD system is chip (1chip=0.78125us, that is, a multiple clock of 1.28MHZ is required as the system clock for timing), and a higher timing accuracy can be selected during system design, namely: 1 / nchip, where n is 2 x , wherein x=0, 1, 2, ...; the preferred x=5 of this embodiment is explained, that is, the timing a...

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Abstract

The present invention relates to the field of mobile communication, and in particular provides a multi-mode terminal system clock timing method and device. The method first determines the timing accuracy of the TD system and LTE system, determines the system reference timing clock and reference counting length, and designs the reference timing clock. counter, and then obtain the timing deviation of each system of the multi-mode system, and finally carry out synchronous adjustment of the TD system and the LTE system; the device includes a reference clock counter, a timing deviation acquisition unit and a synchronization adjustment unit; two of the present invention in the multi-mode terminal The system uses the same reference clock and a counter instead of using independent counters for each system, which reduces a counter and saves hardware overhead, and the timing relationship between TD and LTE systems can be calculated in real time without using additional hardware circuits , saving system resource overhead.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a time division synchronous code division multiple access TD-SCDMA (abbreviated as TD) / time division long term evolution TDD-LTE (abbreviated as LTE) multimode terminal system clock timing method and device. Background technique [0002] The current third-generation mobile communication system is becoming more and more mature, and already has a certain number of users. After the development of the third-generation and fourth-generation mobile communication technologies, it has become a development trend. From the user's point of view, in order to ensure the smooth transition of mobile communication users to the system, the multi-mode and miniaturization of the terminal has become an objective requirement; and there is no small terminal with TD / LTE multi-mode function in the market at present. [0003] In the TD system, the length of a radio frame is 10ms, and the lengt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W88/06H04B7/26
Inventor 王茜杨小勇唐平
Owner SPREADTRUM COMM (SHANGHAI) CO LTD