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Cell search device, method and user equipment

A cell search and interference cell technology, applied in the communication field, can solve the problems of low cell search performance, performance deterioration, long search time, etc., and achieve the effect of reducing the impact of strong interference, improving performance, and shortening the time

Inactive Publication Date: 2017-04-12
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, with the decrease of SINR, the performance of traditional cell search method deteriorates seriously, so the performance of cell search is low and the search time is long

Method used

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  • Cell search device, method and user equipment
  • Cell search device, method and user equipment
  • Cell search device, method and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An embodiment of the present invention provides a cell search method, image 3 It is a flow chart of the cell search method in the embodiment of the present invention. Such as image 3 As shown, the cell search method includes:

[0041] Step 301, performing primary synchronization signal detection on the received signal to obtain the identification and timing of the primary synchronization signal;

[0042] Step 302, using the result of primary synchronization signal detection to select interfering cell information, and canceling signals related to interfering cell information from received signals to obtain received signals after interference cancellation;

[0043] Step 303: Perform primary synchronization signal detection on the interference-eliminated received signal to obtain the identification and timing of the interference-eliminated primary synchronization signal.

[0044] In this embodiment, the user equipment can perform a cross-correlation operation on the r...

Embodiment 2

[0062] An embodiment of the present invention provides a cell search method, and on the basis of Embodiment 1, the detection of the primary synchronization signal and the detection of the secondary synchronization signal of the present invention are described in detail. In the secondary synchronization signal detection stage in the embodiment of the present invention, signal reconstruction and interference elimination may also be performed, and two or more secondary synchronization signal detections may be performed.

[0063] Image 6 It is a flow chart of the cell search method in the embodiment of the present invention. Such as Image 6 As shown, the cell search method includes a primary synchronization signal detection phase 601 and a secondary synchronization signal detection phase 602 . Wherein the primary synchronization signal detection stage 601 includes:

[0064] Step 6011: Perform primary synchronization signal detection on the received signal to obtain the identi...

Embodiment 3

[0119] An embodiment of the present invention provides a cell search device, which corresponds to the cell search method described in Embodiment 1, and the same content will not be repeated here.

[0120] Figure 12 It is a schematic diagram of the structure of the cell search device according to the embodiment of the present invention, as shown in Figure 12 As shown, the cell search apparatus 1200 includes: a first primary synchronization detection unit 1201 , a primary synchronization interference elimination unit 1202 and a second primary synchronization detection unit 1203 .

[0121] Among them, the first primary synchronization detection unit 1201 performs primary synchronization signal detection on the received signal to obtain the primary synchronization signal identification and timing; the primary synchronization interference elimination unit 1202 uses the result of primary synchronization signal detection to select interfering cell information, and obtains the infor...

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PUM

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Abstract

An embodiment of the invention provides a cell searching device and method as well as user equipment. The cell searching method comprises steps as follows: primary synchronizing signal detection is performed on received signals, and primary synchronizing signal identification and timing are acquired; interference cell information is selected according to a primary synchronizing signal detection result, signals related to the interference cell information are eliminated from the received signals, and the interference cancellation received signals are obtained; the interference cancellation received signals are subjected to primary synchronizing signal detection, and interference cancellation primary synchronizing signal identification and timing are acquired. Through the embodiment of the invention, influence of strong interference in a heterogeneous network environment can be reduced, a weak cell can be detected while a strong cell is detected, the cell searching performance is improved, and the cell searching time is shortened.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a cell search device, method and user equipment. Background technique [0002] In a long term evolution system (LTE, Long Term Evolution), a base station (eNB, eNodeB) does not provide a user equipment (UE, User Equipment) with a list of neighboring cell information. Therefore, when the user equipment performs cell handover and cell reselection, the user equipment first needs to detect adjacent cells. The purpose of the neighbor cell detection is to obtain the timing information of the neighbor cells and the ID information of these cells, so as to prepare for the subsequent neighbor cell measurement. [0003] The search for adjacent cells is accomplished based on two synchronization signals in the downlink: a primary synchronization signal (PSS, Primary Synchronous Signal) and a secondary synchronization signal (SSS, Secondary Synchronous Signal). Therefore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7083H04B1/7097H04W48/16
Inventor 颜智孙刚王昕
Owner FUJITSU LTD