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Method, system and equipment for sending time information and synchronizing time

A time information and transmission system technology, applied in the direction of synchronization devices, wireless communications, electrical components, etc., can solve the problems of other network-side devices that cannot perform time synchronization and poor robustness

Active Publication Date: 2014-12-03
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The robustness is poor, and the reliability of the NTP server will become the bottleneck of the reliability of the entire network. Once the NTP server crashes due to the increase in the number of UEs, other network-side devices cannot perform time synchronization

Method used

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  • Method, system and equipment for sending time information and synchronizing time
  • Method, system and equipment for sending time information and synchronizing time
  • Method, system and equipment for sending time information and synchronizing time

Examples

Experimental program
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Effect test

Embodiment 1

[0076] In this embodiment, the system time information is sent on the HS-DSCH, specifically as follows:

[0077] Step S01: The TDD system side defines the T-RNTI used to indicate the receiving system time;

[0078] Step S02: The radio network controller includes the system time corresponding to the radio frame SFN=2396 in the RRC signaling message and sends it to the base station. The system time information is calculated by the radio network controller according to the mapping relationship between SFN and system time, and is The start transmission time of the wireless frame with SFN=2396, for example, this time is 2009-10-20, 10:28:35:535 milliseconds,

[0079] Step S03: The base station in the TDD system sends the downlink control information including T-RNTI through the HS-SCCH in the radio frame of SFN=2394; the UE in the connected state in the cell of the base station decodes the T-RNTI from the HS-SCCH, and prepares Receive system time information on the corresponding H...

Embodiment 2

[0084] In this embodiment, the system time is sent on the FACH, and the UE in the connected state reads the system time information, as follows:

[0085] Step S11: The RNC in the TDD system carries SFN3000 in the system broadcast message of the cell to indicate that the network side will send system time information in the radio frame of SFN=3000, and the RNC transmits the system broadcast message to the base station;

[0086] Step S12: The base station broadcasts the system broadcast message in the cell, and the connected UE in the cell obtains the SFN3000 radio frame identification information from the system broadcast message, and knows that the network sends system time information on the radio frame with SFN=3000;

[0087] Step S13: RNC calculates the system time corresponding to the radio frame of SFN=3000 through the mapping relationship between SFN and system time at the moment of the radio frame of SFN=2998, for example, the system time is 2009-10-20, 14:05 24 seconds...

Embodiment 3

[0092] In this embodiment, the system time information is sent on the FACH, and the UE in an idle state obtains the system time information after establishing an RRC connection, as follows:

[0093] Step S21: The RNC in the TDD system carries SFN3000 in the system broadcast message of the cell to indicate that the network side will send system time information in the radio frame with SFN=3000, and the RNC transmits the system broadcast message to the base station;

[0094] Step S22: the base station broadcasts the system broadcast message in the cell, and the UE in the idle state in the cell obtains the SFN3000 radio frame identification information from the system broadcast message, and knows that the network sends system time information on the radio frame of SFN=3000;

[0095] Step S23: RNC calculates the system time corresponding to the radio frame with SFN=3000 through the mapping relationship between SFN and system time at the moment of the radio frame with SFN=2998, for ...

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Abstract

The embodiment of the invention discloses a method for sending time information and synchronizing time, comprising the following steps: a network side sends the system time information of the network side to a terminal through a downlink transmission channel; and the terminal receives the system time information from the downlink transmission channel, and corrects the local time of the terminal according to the system time information, so as to lead the corrected local time of the terminal to be synchronous with the system time. The embodiment of the invention also discloses a wireless communication system and equipment. According to the invention, the terminal can reliably and simply acquire the system time, thus ensuring that the local time and the system time of the network side are synchronous.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a time information sending and time synchronization method, system and equipment. Background technique [0002] In the time division duplex (TDD) mobile communication system, in order to reduce the artificial drive test work, in order to reduce the construction and operation costs of the network, the third generation mobile communication standardization organization (3GPP) is conducting the research work on the minimum drive test (MDT) . [0003] The idea of ​​MDT is to define several measurement quantities, and the terminal measures these measurement quantities and reports the measurement results to the network side. At the same time, the UE needs to report the measurement time information together with the measurement results to the network side to assist the network in network optimization. If the measurement time reported by the UE is not synchronized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W74/08
Inventor 王彦杨晓东
Owner DATANG MOBILE COMM EQUIP CO LTD