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Multimode terminal and time synchronizing method in cross form switching thereof

A multi-mode terminal and time synchronization technology, applied in the field of mobile communication, can solve the problems of high call drop probability and low measurement ability

Active Publication Date: 2012-11-21
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a multi-mode terminal and its time synchronization method for cross-standard switching to solve the problems of high call drop probability and low measurement capability in the prior art

Method used

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  • Multimode terminal and time synchronizing method in cross form switching thereof
  • Multimode terminal and time synchronizing method in cross form switching thereof
  • Multimode terminal and time synchronizing method in cross form switching thereof

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Embodiment Construction

[0066] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0067] Such as image 3 As shown, it is a flow chart of the first embodiment of the time synchronization method when the multi-mode terminal is switched across the standards of the present invention. This embodiment does not consider the influence of frequency offset, and specifically includes the following steps:

[0068] Step S001: During initialization, the multi-mode terminal performs a cell search, obtains and stores the offset between the frame header position of the first subframe of each standard and the frame header position of the first subfra...

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Abstract

The invention relates to a multimode terminal and a time synchronizing method in the cross form switching thereof. The terminal comprises a computing unit and a switching unit. The method includes that the multimode terminal computes and maintains balance non-working form timing information under the current working form and switches business to the target form according to the maintained target form timing information when business switching is required. The terminal and the method quicken the switching process and improve success ratio, capability and performance for business switching and measurement.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a multi-mode terminal and a time synchronization method for switching between different standards. Background technique [0002] With the development of mobile communication standards and the promotion of commercialization, communication terminals have gradually developed from the initial GSM (globalsystem for mobile communications, Global System for Mobile Communications) or narrowband CDMA (Code Division Multiple Access, called Code Division Multiple Access) single-mode to dual-mode Even multimode terminal form. At present, it is mainly GSM / WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access) or GSM / TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, time division synchronous code division multiple access) dual-mode, with the development of technology, It has gradually evolved into multi-mode forms such as GSM / TD-SCDMA / TD-LTE...

Claims

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Application Information

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IPC IPC(8): H04W36/14H04W56/00H04W88/06
CPCH04W56/00H04W76/048H04W88/06H04W36/14H04W76/28
Inventor 程健
Owner SANECHIPS TECH CO LTD
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