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Implementing method for alien-frequency district search and mobile terminal

A cell search and mobile terminal technology, which is applied in communication between multiple stations, access restrictions, electrical components, etc., can solve problems such as failure to meet 3GPP synchronization performance requirements, and achieve the effect of improving synchronization performance

Inactive Publication Date: 2009-02-25
新奇点智能科技集团有限公司
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Problems solved by technology

[0015] However, for inter-frequency cell search, the measurement can only be performed once every 5.5ms. Although the PSS and SSS symbols will appear within the 5.5ms measurement time, usually each symbol will only appear once; that is Said: In the inter-frequency cell search, since there are no continuous PSS and SSS symbols, the UE can usually only detect one PSS or SSS symbol in each TGL, and the cell search in this way obviously cannot achieve the synchronization performance of 3GPP Require

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  • Implementing method for alien-frequency district search and mobile terminal
  • Implementing method for alien-frequency district search and mobile terminal
  • Implementing method for alien-frequency district search and mobile terminal

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[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0049] The main idea of ​​the present invention is: performing multiple synchronization signal correlations in multiple continuous gaps to obtain multiple correlation results, and acquiring synchronization with inter-frequency cells according to the power accumulation of the multiple correlation results. Since the present invention refers to multiple synchronization symbols when performing inter-frequency cell synchronization, the synchronization performance is greatly improved compared with the prior art which only refers to one synchronization symbol for inter-frequency cell synchronization. The synchronization signal includes: PSS and SSS.

[0050] figure 2 It is a schematic flowchart of a method for implementing inter-frequency cell search in the ...

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Abstract

The invention discloses a method for realizing dissimilar frequency cell search, which comprises steps of performing correlation with a primary synchronization signal (PSS) in multiple continuous measurement gaps (Gaps) to obtain multiple PSS power, and determining PSS boundary and cell group ID according to the accumulated result of the multiple PSS power; and determining the position of a secondary synchronization signal (SSS) according to the PSS boundary, performing correlation with the SSS in multiple continuous Gaps after the Gaps subjected to the correlation with the PSS to obtain multiple SSS power, and determining frame timing and cell group ID according to the accumulated result of the multiple SSS power. The invention further discloses a mobile terminal comprising a dissimilar frequency cell search module for performing dissimilar frequency cell search. The inventive method can improve the synchronization performance of dissimilar frequency cell search.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method for realizing inter-frequency cell search and a mobile terminal. Background technique [0002] In a wireless communication system, as a mobile user moves, a user terminal (UE) used by the mobile user may move from the coverage of the current serving cell to the coverage of another cell. When the radio signal quality of the serving cell of the UE is poor, it is usually necessary to handover the UE to an adjacent cell with better radio signal quality (neighboring cell for short), and this process is called cell handover. [0003] Before performing cell handover, the UE needs to receive signals at the frequency points of relevant neighboring cells, and determine the target cell to be handed over by measuring the radio signal quality of the neighboring cells. The adjacent cell may have the same frequency as the current serving cell, or may have a different freq...

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Application Information

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IPC IPC(8): H04B1/707H04B7/26H04W48/16
Inventor 张辉王西强刘嵘
Owner 新奇点智能科技集团有限公司