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Method and device for acquiring time information by mobile terminal

A mobile terminal and time acquisition technology, applied in the TD-SCDMA field, can solve the problems that it is difficult for the time of the mobile terminal to be consistent with the time of the network side, affect the user experience, and it is difficult to ensure that the mobile terminal can successfully receive data, etc., to achieve strong Time error correction ability, improve sensitivity, and ensure the effect of consistency

Active Publication Date: 2014-12-10
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the mobile terminal and the network side use their own time sources respectively, and there is no connection between the two. Therefore, it is difficult to ensure the consistency of the time of the mobile terminal and the time of the network side, so it is difficult to ensure that the mobile terminal can successfully receive data.
When the mobile terminal uses services that rely on time information on the network side, it affects the user's experience

Method used

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  • Method and device for acquiring time information by mobile terminal
  • Method and device for acquiring time information by mobile terminal
  • Method and device for acquiring time information by mobile terminal

Examples

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Embodiment Construction

[0040] figure 1 A flowchart of a method for obtaining time information for a mobile terminal of the present invention, such as figure 1 shown, including:

[0041] Step 100: the mobile terminal obtains the absolute time and SFN of the network side.

[0042] In this step, the time source delivered by the network side may be provided by a GPS carried on a radio network controller (RNC, RadioNetwork Controller), or may be obtained by the RNC from an NTP server provided by an operator through a network time protocol (NTP). The network side carries the absolute time of the network side Time through air interface messages Nework(Second) to the mobile terminal. Wherein, the air interface message may be an RRC dedicated signaling message, a multicast broadcast service (MBMS) message, a system broadcast message, and the like.

[0043] The system frame number (SFN) is also called the system message frame number. In the TD-SCDMA system, the SFN of the system is calculated by GPS time:...

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Abstract

The invention provides a method and a device for acquiring time information by a mobile terminal. The mobile terminal calculates the actual time of the mobile terminal according to acquired network side absolute time and System Frame Number (SFN). In the method, the SFN is actually the lowest 12 bit after the network side absolute time is converted into 10 ms unit time, namely, even the clock source time of a clock source T is not accurate, the error can be corrected into the precision of the SFN if the error is less than or equal to 40.96 s, namely the range of 10 ms through the method; therefore, the method is utilized to ensure the consistency of the time of the mobile terminal and that of the network side; when the mobile terminal uses the service dependent on the time information of the network side, the experience of a user is improved; meanwhile, the strong time error correction capability is provided for the mobile terminal.

Description

technical field [0001] The invention relates to TD-SCDMA technology, in particular to a method and device for a mobile terminal to obtain time information. Background technique [0002] The time information on the network side obtained by the mobile terminal is relied on by certain services in the system. For example, the working goal of OMA BCAST is to provide a service-level solution for mobile multimedia broadcasting / mobile TV services. The defined service guide (Service Guide) Provides channel / program information of multimedia broadcasting / mobile TV services, some of which are displayed to users, such as which programs are available on CCTV1 channel, the start / end time of each program, etc.; some content is to control the behavior of mobile terminals, such as news The data unit (fragment) of the simulcast program takes effect (Valid From) at 19:00, and expires (ValidTo) at 19:30. start time), end time (end time) and other parameters to access a certain channel, and pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/12H04W56/00H04W88/02H04B7/26
Inventor 丛进赵明鹤徐西宝
Owner HUAWEI TEHCHNOLOGIES CO LTD