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A method of searching LTE multi-cell

A multi-cell and cell technology, applied in wireless communication, access restriction, synchronization devices, etc., can solve the problems of affecting the number of cells, relying on the performance of calculating synchronization points, time-consuming, etc., achieving high implementation complexity, improving processing speed and Dealing with time-sensitive effects

Active Publication Date: 2019-11-05
GUANGZHOU HUIRUI SITONG INFORMATION SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a specific application, when multiple cells need to be searched, the operation steps mentioned above need to be repeated for each cell search.

Method used

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  • A method of searching LTE multi-cell

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Experimental program
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Embodiment

[0032] Such as figure 1 As shown, the method for searching LTE multi-cells in this embodiment includes the following steps:

[0033] 1. First, the main synchronization signal is processed, and the main synchronization signal is composed of 3 sets of Zadoff-Chu sequences. The primary synchronization signal is transmitted on the last symbol of the first slot of subframe 0 and subframe 5 in the time domain, or on the third symbol of subframe 1 and subframe 6, and occupies the middle 72 subcarriers in the frequency domain . According to the fixed position of the primary synchronization signal in the time domain, the primary synchronization signal can be extracted from the air interface data, and then correlated with the local ZC sequence to calculate the correlation peak value. In order to reduce the complexity of the algorithm and the amount of calculation, the correlation calculation of the present invention adopts the fast FFT algorithm, first converts the air interface data ...

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Abstract

The invention discloses a method for searching multiple cells in LTE. The method comprises the following steps: (1) processing a main synchronization signal to acquire an in-group ID number of a cell and a corresponding synchronization point; (2) according to the acquired synchronization point and the corresponding in-group ID number, processing an auxiliary synchronization signal; (3) processing each PCI; (4) analyzing a control format indication channel; (5) performing scrambling on a control channel through S-RNTI, and descrambling on the decoded data by using the SI-RNTI value; (6) analyzing a shared channel; and (7) orderly processing multiple candidate PCIs to acquire the system parameter of the cell corresponding to each PCI, thereby finishing searching of multiple cells. According to the invention, the main synchronization signal and the auxiliary synchronization signal are only needed to be processed once, multiple candidate physical cell ID numbers and the corresponding synchronization points can be acquired, and the synchronization of multiple cells can be finished by performing processing for each physical cell ID number. The method disclosed by the invention has the advantages of being low in computational burden, and simple and convenient for processing.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, relates to a method for searching LTE multi-cells. Background technique [0002] LTE is the long-term evolution of the UMTS technical standard formulated by the 3GPP organization. It introduces key technologies such as OFDM and MIMO, which significantly increases the spectral efficiency and data transmission rate, and supports multiple bandwidth allocations, and supports the world's mainstream 2G / 3G frequency bands and some New frequency bands are added, so the spectrum allocation is more flexible, and the system capacity and coverage are also significantly improved. It is a quasi-4G communication standard. LTE cell search is the process of obtaining synchronization with cell time and frequency, as well as cell system parameters. First, obtain the PCI of the cell by processing the primary synchronization signal and the secondary synchronization signal,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/16H04W56/00
CPCH04W48/16H04W56/00
Inventor 李金龙
Owner GUANGZHOU HUIRUI SITONG INFORMATION SCI & TECH CO LTD