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Method and device for detecting primary synchronization signal and method and system for searching neighborhoods

A technology of master synchronous signal and synchronous signal, which is applied in transmission system, digital transmission system, modulated carrier system, etc. It can solve the problem of PSS false detection when integer multiple frequency offset, and achieve the effect of avoiding PSS detection error and improving accuracy

Active Publication Date: 2012-05-16
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0014] The present invention provides a primary synchronization signal detection method and device to solve the problem of PSS false detection when there is an integer multiple frequency offset

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  • Method and device for detecting primary synchronization signal and method and system for searching neighborhoods
  • Method and device for detecting primary synchronization signal and method and system for searching neighborhoods
  • Method and device for detecting primary synchronization signal and method and system for searching neighborhoods

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[0056] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0057] During the cell search process, the present invention proposes a solution to the primary synchronization signal (PSS) detection error caused by integer multiple frequency offsets in the system. The integer multiple frequency offset value is obtained, and then the integer multiple frequency offset compensation is performed on the received signal, and then follow-up operations such as cell ID detection are continued, thereby improving the performance of PSS detection.

[0058] Based on the above solutions, and by analyzing various possible causes of primary synchronization signal (PSS) misdetection, the present invention proposes three solutions, which will be described in detail through embodiments below.

[0059] First, the s...

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Abstract

The invention provides a method and device for detecting a primary synchronization signal so as to solve the problem of the false detection of the primary synchronization signal (PSS) caused by the existence of integer-frequency-offset. The method comprises the following steps of: firstly determining an integer-frequency-offset value in the PSS detection process in the first step of neighborhood searching, then carrying out integer-frequency-offset compensation on a receipt signal, and continuing to carry out follow-up operations such as the ID detection of the neighborhoods and the like, thereby avoiding the false detection of the PSS caused by the frequency-offset as far as possible, effectively increasing the accuracy of the PSS detection and further ensuring UE (User Equipment) to be capable of normally residing in a network. Based on the method, the invention provides three specific solutions which are used for analyzing various possible reasons causing the false detection of the PSS and can be flexibly selected according to different PSS detecting methods. In addition, the invention also provides a method and system for searching the neighborhoods based on the primary synchronization signal detection, which can increase the accuracy of neighborhood detection.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a primary synchronization signal detection method and device, and also relates to a cell search method and system based on the primary synchronization signal detection. Background technique [0002] The cell search process is a very critical process in wireless cellular communication, and it is a prerequisite for establishing a communication link between a user terminal (UE) and a base station. The main functions of the cell search are: during the UE's initial access or cell switching process, it can quickly capture the cell and identify the cell; complete the downlink time synchronization and downlink frequency synchronization of the cell; and read the broadcast information of the cell to perform normal camping . [0003] In the Long Term Evolution (LTE, Long Term Evolution) system, the cell search mechanism adopts a hierarchical cell search, that is, to complete the d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04W24/04H04W48/16
CPCH04L27/2659H04J11/0073
Inventor 张凌雁李琼
Owner DATANG MOBILE COMM EQUIP CO LTD
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