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Air interface synchronizing method, device and system

A technology of air interface synchronization and synchronization source, which is applied in the direction of synchronization devices, electrical components, wireless communication, etc., and can solve the problem that the base station to be synchronized is difficult to detect in time

Active Publication Date: 2015-11-25
CHINA MOBILE COMM GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide an air interface synchronization method, device and system to solve the problem in the prior art that when the synchronization information carried in the SIB signaling changes, it is difficult for the base stations to be synchronized of other operators to detect this change in time The problem

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  • Air interface synchronizing method, device and system
  • Air interface synchronizing method, device and system

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Experimental program
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Effect test

Embodiment 1

[0120] Such as Figure 5 As shown, it is a schematic diagram of adopting the legacyRS deactivation technology based on the MBSFN subframe in the first case in step 22 . Wherein, listeningRS is a CRS, and the candidate transmission pattern candidateTxPattern1 corresponds to stratumlevel=0, candidateTxPattern2 corresponds to stratumlevel=1, and candidateTxPattern3 corresponds to stratumlevel=2.

[0121] Before the synchronization information carried in the SIB signaling is changed, the original listeningRSpattern is candidateTxPattern1; after the synchronization information carried in the SIB signaling is changed, the new listeningRSpattern is candidateTxPattern2, and the subframe corresponding to candidateTxPattern1 is configured as an MBSFN subframe.

Embodiment 2

[0123] Such as Figure 6 As shown, it is a schematic diagram of using the MBSFN subframe-based legacyRS deactivation technology in the second case in step 22 . Wherein, listeningRS is a CRS, and the listeningRSpattern candidate set includes: candidate transmission patterns candidateTxPattern1, candidateTxPattern2 and candidateTxPattern3.

[0124]Before the synchronization information carried in SIB signaling is changed, the original listeningRSpattern is candidateTxPattern1, and the subframes corresponding to candidateTxPattern2 and candidateTxPattern3 except candidateTxPattern1 are configured as MBSFN subframes; after the synchronization information carried in SIB signaling is changed, the new listeningRSpattern is candidateTxPattern2, and the subframes corresponding to candidateTxPattern1 and candidateTxPattern3 other than candidateTxPattern2 are all configured as MBSFN subframes.

Embodiment 3

[0126] Such as Figure 7 As shown, it is a schematic diagram of adopting the V-shift-based frequency domain offset technology in the first case and the second case in step 22. Wherein, listeningRS is CRS, and candidateTxPattern1, candidateTxPattern2 and candidateTxPattern3 correspond to different frequency domain offsets respectively.

[0127] Before the synchronization information carried in SIB signaling is changed, the original listeningRSpattern is candidateTxPattern1, corresponding to frequency domain offset 1; after the synchronization information carried in SIB signaling is changed, the new listeningRSpattern is candidateTxPattern2, corresponding to frequency domain offset 2.

[0128] Based on the above introduction of the air interface synchronization method on the side of the network element to be synchronized and the side of the synchronization source network element, the essence of the technical solution of the present invention is further clarified through specific...

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Abstract

The invention discloses an air interface synchronizing method, device and system used for solving a problem that change of synchronization information carried in SIB signals cannot be detected timely by to-be-synchronized base stations of other operators in the prior art. The method includes that when a to-be-synchronized network element detects no listening RS of a synchronization source network element at a predetermined resource position for detecting listening RS of reference signals, the to-be-synchronized network element detects SIB signals of system message blocks of the synchronization source network element and acquires synchronization information carried in the SIB signals, wherein the synchronization source network element is selected from at least one network element of a foreign operator by the to-be-synchronized network element; the to-be-synchronized network element updates its synchronization information according to the synchronization information carried in the SIB signals or reselects the synchronization source network element from the at least one network element of the foreign operator.

Description

technical field [0001] The present invention relates to the technical field of base station synchronization between different operators, in particular to an air interface synchronization method, device and system. Background technique [0002] At present, the 3rd Generation Partnership Project (3rdGeneration Partnership Project, 3GPP) focuses on the air interface synchronization technology of network interception. SourceCell) reference signal (ReferenceSignal, RS), according to which the local clock is adjusted to maintain time-frequency synchronization between stations. [0003] In order to realize air interface synchronization among different operators, there is currently a scheme of carrying synchronization information in SIB signaling. Since the synchronization information carried on the SIB signaling may change during operation, the base station to be synchronized needs to be able to identify this change in time. However, due to the complicated demodulation process of ...

Claims

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Application Information

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IPC IPC(8): H04W56/00
Inventor 柯颋刘建军王飞沈晓冬郑毅胡臻平
Owner CHINA MOBILE COMM GRP CO LTD
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