Method of Cell Search and Method of Detecting Primary Synchronization Signal Reception Time
A primary synchronization signal and cell search technology, applied in the field of cell search, can solve the problems of reducing and interfering with the success rate of cell search
Active Publication Date: 2020-04-07
SUZHOU PANKORE INTEGRATED CIRCUIT TECH CO LTD
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Problems solved by technology
[0027] The present invention solves the problem that the success rate of cell search decreases due to mutual interference of synchronization signals under frame synchronization
Method used
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Embodiment Construction
[0037] image 3It is a schematic diagram of a communication device 30 according to an embodiment of the present invention. The communication device 30 can be a client, which includes a processing device 300 , a storage unit 310 and a communication interface unit 320 . The processing device 300 may be a microprocessor or an application specific integrated circuit (ASIC). The storage unit 310 can be any type of data storage device for storing the program code 314 , and the program code 314 can be read and executed by the processing device 300 . The communication interface unit 320 can be a wireless transceiver, which exchanges wireless signals with a network end (such as a base station) according to the processing result of the processing device 300 .
[0038] Figure 4 It is a flow chart of a process 40 in Embodiment 1 of the present invention. The process 40 can be used in the communication device 30 to reduce the cell search time and increase the success rate. The proces...
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The invention relates to a cell searching method, and a method for detecting a receiving time of a primary synchronization signal. The cell searching method is used for a mobile device of a wireless communication system, and comprises the following steps: carrying out a primary synchronization signal receiving time detection program to obtain at least one possible receiving time point of the primary synchronization signal; carrying out a primary synchronization signal hypothesis program to generate a first frequency domain primary synchronization sequence, a second frequency domain primary synchronization sequence and a third frequency domain primary synchronization sequence in a frequency domain according to three radical exponents respectively corresponding to a first physical-layer identity, a second physical-layer identity and a third physical-layer identity; and carrying out a secondary synchronization signal coherence detection program, so that secondary synchronization signals are calculated respectively through the first frequency domain primary synchronization sequence, the second frequency domain primary synchronization sequence and the third frequency domain primary synchronization sequence according to the one possible receiving time point, and corresponding physical-layer cell-identity groups are obtained.
Description
technical field [0001] The present invention relates to a cell search method, in particular to a cell search method that improves the success rate of cell search through the hypothesis mechanism of entity identifier and the judgment mechanism of auxiliary synchronization signal correlation calculation output. Background technique [0002] In a wireless communication system, when a client (user equipment) tries to access a network, it first needs to perform a cell search procedure to obtain a cell identifier, and then perform a synchronization procedure with the cell. During the cell search procedure, the UE should obtain the cell identifier as soon as possible to obtain synchronization with the cell and reduce time and frequency errors. [0003] In the Long Term Evolution (LTE), 504 physical cell identifiers ( physical-layer cell identity), which consists of 168 physical cell groups ( physical-layercell-identity group), each group has 3 entity identifiers ( physical-la...
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IPC IPC(8): H04J11/00H04W56/00
CPCH04J11/0069H04W56/00
Inventor 张仲尧林专湖
Owner SUZHOU PANKORE INTEGRATED CIRCUIT TECH CO LTD