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Air interface synchronization method, base station, and system

An air interface synchronization and base station technology, applied in the field of communication, can solve problems such as interference, and achieve the effect of solving the interference problem

Active Publication Date: 2015-12-30
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unlike the sparse deployment scenarios of Home NodeBs, dense deployment and even ultra-dense deployment scenarios also need to be paid attention to in small cell networks. At this time, the above-mentioned air interface synchronization technology cannot meet the dense or ultra-dense deployment of small cell networks. In the scenario where the same layer may include more than or equal to 6 SmallCell micro-stations, the upper-layer SmallCell interferes with the lower-layer SmallCell

Method used

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  • Air interface synchronization method, base station, and system
  • Air interface synchronization method, base station, and system
  • Air interface synchronization method, base station, and system

Examples

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Embodiment 1

[0078] The air interface synchronization method provided in this embodiment is applied to the first base station, such as figure 1 shown, including:

[0079] Step 101: The first base station generates a first synchronization reference signal, wherein the first base station is one of M base stations in the Nth layer, and the first synchronization reference signal and the first base station are located in the Nth layer, except Synchronization reference signals of other base stations other than the first base station are orthogonal to each other;

[0080] Step 102: The first base station sends the first synchronization reference signal in a preset synchronization subframe.

[0081] Here, before the execution of step 101, the method further includes: configuring a pattern set of the first synchronization reference signal, and all patterns in the set are mutually orthogonal on time-frequency resources;

[0082] Wherein, the orthogonal manner on the time-frequency resource may inc...

Embodiment 2

[0101] The air interface synchronization method provided in this embodiment is applied to the second base station, such as image 3 shown, including:

[0102]Step 301: The second base station listens to the first synchronization reference signal sent by the first base station in the Nth layer small cell in the preset listening subframe; wherein, the second base station is the N+1th layer One of the L base stations in the small cell; the first synchronization reference signal is orthogonal to the synchronization reference signals of other base stations except the first base station that the first base station is located in the Nth-layer small cell; N is A positive integer greater than or equal to 2, L is a positive integer greater than or equal to 1;

[0103] Step 302: The second base station performs time-frequency synchronization according to the first synchronization reference signal.

[0104] The listening subframe is an MBSFN subframe, and no data is sent in the MBSFN do...

Embodiment 3

[0126] This embodiment provides a base station, such as Figure 9 As shown, the base station includes:

[0127] The generating unit 901 is configured to generate a first synchronization reference signal of the base station where the base station is located, where the base station is one of the M base stations in the small cell on the Nth floor, and the first synchronization reference signal and the base station are located in the small cell on the Nth floor In the cell, the synchronization reference signals of other base stations except the base station are orthogonal to each other; N is a positive integer greater than or equal to 2, and M is a positive integer greater than or equal to 1;

[0128] The sending unit 902 is configured to send the first synchronization reference signal in a preset synchronization subframe.

[0129] The generating unit is further configured to configure a pattern set of the synchronous reference signal, and all the patterns in the set are orthogon...

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Abstract

The invention discloses an air interface synchronization method, a base station, and a system. The method includes: a first base station generates a first synchronization reference signal, wherein the first base station is one of M base stations in the Nth small cell, the first synchronization reference signal and the first base station are positioned in the Nth small cell, synchronization reference signals of other base stations except for the first base station are orthogonal to each other, N is a positive integer greater than or equal to 2, M is a positive integer greater than or equal to 1, and the first base station sends the first synchronization reference signal at a preset synchronous subframe.

Description

technical field [0001] The invention relates to management technology in the field of communication, in particular to an air interface synchronization method, base station and system. Background technique [0002] The time-frequency air-interface synchronization performance of a network composed of small cells (SmallCells) is mainly determined by the SINR distribution characteristics. In the network topology structure of multi-hop layered air interface synchronization, the interference to the synchronization signal mainly comes from the downlink data transmitted by the adjacent SmallCell in the listening subframe, and the cross-layer base station of the N±M layer, M≥2, for the N layer The interference of base station network interception can basically be ignored. Adjacent layer interference includes the interference of upper-layer SmallCells to lower-layer SmallCells, that is, multiple N-1th layer base stations send LRS signals to conflict with each other's time-frequency r...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04W56/00
Inventor 柯颋刘建军郑毅王飞姜大洁胡臻平
Owner CHINA MOBILE COMM GRP CO LTD
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