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A method, device and system for locating an interference source cell

A technology for interfering cells and interference sources, applied in the field of locating interference source cells, which can solve the problems of difficulty in locating interference sources, difficulty in eliminating interference signals, and remote interference is not very prominent.

Active Publication Date: 2022-04-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the cell of the base station cannot work normally due to interference from other cells, and the source of the interference signal cannot be quickly located, then it will be difficult to eliminate the interference signal, and it will not be possible to quickly restore the disturbed cell to a normal working state
[0005] At the same time, in the initial stage of TD-LTE system application, the focus of network deployment is on hotspot coverage, while the phenomenon of far-end interference is not very prominent, and such far-end interference will become more prominent in the future
However, in the prior art, there is no effective detection method for remote interference after TD-LTE networking, and because the above-mentioned interference between base stations has the characteristics of multi-station cumulative superposition and wide range, it is difficult to locate the interference source. bigger

Method used

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  • A method, device and system for locating an interference source cell
  • A method, device and system for locating an interference source cell
  • A method, device and system for locating an interference source cell

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1: A method for locating an interference source cell, such as figure 2 As shown, the method includes:

[0052] Step 201, the base station extracts the interference signal from the received signal;

[0053] Specifically, when the base station extracts the interference signal from the received signal, it may extract the common uplink time slot and\or the uplink pilot time slot (Uplink Pilot Time Slot, UpPTS for short). In order to avoid including the signal of the own cell, it can also be performed by using the common uplink time slot and the uplink pilot time slot when the local cell is empty.

[0054] In order to obtain more interference signal information and expand the range of extraction, it can also be extracted on a guard interval (GuardPeriod, GP for short).

[0055] At the same time, when part or all of the downlink time slots of the base station are in the silent period, interference may be extracted from the downlink time slots in the silent perio...

Embodiment 2

[0076] Embodiment 2: A method for locating an interference source cell, such as Figure 6 As shown, the method includes:

[0077] Step 601, the base station performs interference measurement on the received signal, and when there is interference from neighboring cells, the base station extracts the interference signal from the received signal;

[0078] Step 602, the base station analyzes and detects the interference signal, and obtains the time-domain symbol position and the frequency-domain resource element position of the reference signal sequence of the interfering cell

[0079] Step 603, the base station obtains the time-domain symbol position of the secondary synchronization signal according to the time-domain symbol position of the reference signal sequence of the interfering cell, and obtains the secondary synchronization signal sequence of the interfering cell according to the time-domain symbol position detection of the secondary synchronization signal, and then accor...

Embodiment 3

[0087] Embodiment 3: This embodiment provides a device for locating an interference source cell. The device is as attached Figure 7 The shown includes: an interference signal measurement and extraction unit, a cell reference signal position detection unit, a secondary synchronization signal detection unit and an identification determination unit, wherein:

[0088] An interference signal extraction unit 701, configured to extract an interference signal from a received signal;

[0089] The cell reference signal position detection unit 702 is configured to analyze and detect the interference signal, and obtain the time domain symbol position and the frequency domain resource element position of the interference cell reference signal sequence;

[0090] The secondary synchronization signal detection unit 703 is configured to obtain the time domain symbol position of the secondary synchronization signal according to the time domain symbol position of the reference signal sequence o...

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Abstract

The invention discloses a method, device and system for locating an interference source cell. The method includes: extracting an interference signal from a received signal; analyzing and detecting the interference signal to obtain the time domain reference signal sequence of the interference cell Symbol position and frequency domain resource element position; obtain the time domain symbol position of the secondary synchronization signal according to the time domain symbol position of the reference signal sequence of the interfering cell, and obtain the secondary synchronization signal of the interfering cell according to the time domain symbol position detection of the secondary synchronization signal sequence, and then according to the secondary synchronization signal sequence of the interfering cell, obtain the cell identity used when generating the secondary synchronization signal sequence of the interfering cell; according to the frequency domain resource element position of the reference signal sequence of the interfering cell and the generation of the secondary synchronization signal sequence of the interfering cell The cell identity used at the time is obtained to obtain the cell identity of the interference source cell.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method, device and system for locating an interference source cell. Background technique [0002] In the existing long-term evolution, for the TD-LTE (Time Division Long Term Evolution, time-division long-term evolution) system, the base station is required to maintain strict time synchronization, which is generally guaranteed by GPS (Global Positioning System, Global Positioning System) synchronization. Timing synchronization between base stations. Since the TD-LTE system uses the same-frequency coverage method to deploy the network, there is certainly mutual interference between adjacent cells. In addition, since the uplink and downlink transmissions of the TD-LTE system share frequency, in addition to traditional inter-cell interference, there is also a situation where the downlink signal of the remote base station interferes with the uplink signal of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W24/02H04W64/00H04L5/00
CPCH04L5/0048H04W24/02H04W64/003
Inventor 王雯芳曾召华蒙波李斌
Owner ZTE CORP