Cell searching method

A cell search and cell technology, applied in the field of cell search, can solve the problems of cell search failure, cell ID detection error, UE cannot normally camp in the cell, etc., to improve the success rate and overcome the effect of low received signal power

Inactive Publication Date: 2013-04-17
POTEVIO INFORMATION TECH
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Problems solved by technology

[0014] From the above process, it can be seen that whether the timing synchronization adjustment is accurate and whether the cell ID detection is correct depends directly on whether the correlation peak calculation between the received PSC sequence and the three local PSC sequences is correct. In practical applications, due to noise, The impact of inter-system interference often causes the largest correlation peak detection error, which will lead to cell ID detection errors, which will lead to the failure of debroadcasting messages, the UE cannot normally camp in the cell, and the cell search fails
[0015] It can be seen that the existing cell search methods have the problem of cell search failure due to the influence of noise and inter-system interference

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[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] The core idea of ​​the present invention is: by increasing the number of cell ID detection times, when the cell IDs detected twice before and after are consistent, the broadcast signals of the three clusters are detected respectively, otherwise the cell ID detection will continue until two consecutive times In this way, since the cell search phase is not sensitive to delay, increasing the number of cell ID detections will not affect system performance, and will increase the probability of correct cell ID detection, greatly improving the success rate of cell search.

[0032] image 3 It is a schematic flow chart of Embodiment 1 of the present invention, such as image 3 As shown, this embodiment mainly includes the following steps:...

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Abstract

The invention provides a cell searching method. By detecting the cell ID (identity) for multiple times, on the premise that the obtained cell ID is correct, the detection of broadcasting signals of three clusters is conducted. By adopting the cell searching method, the influence of factors such as low signal receiving power and disparate system interference can be overcome and the success rate of cell search is improved.

Description

technical field [0001] The invention relates to the access technology of the mobile communication system, in particular to a cell search method in the multi-channel wireless communication system. Background technique [0002] Currently, in a multi-channel wireless communication system, the entire discrete frequency band resource is divided into 40 subbands, including 3 synchronization subbands and 37 service subbands, which belong to 3 different clusters respectively. The synchronization subband is mainly used for cell search, synchronization and broadcast reception, and the service subband is mainly used for uplink and downlink data transmission. Each cluster includes a synchronous subband and several business subbands (as shown in Figure 1). [0003] At the beginning of the cell search, the terminal will select the synchronization subband of one of the three clusters to search for the cell according to the high-layer signaling instruction. The even frame of the synchroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/16
Inventor 齐欢童炜黄德球党笑陶雄强邢益海闫淑辉刘建明李祥珍胡炜徐宏祝锋邓晓晖
Owner POTEVIO INFORMATION TECH
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