Synchronization reference source determination method and terminal
A method for determining a synchronization source and a technology for synchronization sources, which are applied in the field of communication and can solve the problems of large receiver complexity and synchronization detection delay.
Active Publication Date: 2021-04-20
DATANG MOBILE COMM EQUIP CO LTD
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[0007] At the receiving terminal, for a synchronization source around it, it is necessary to receive a maximum of 8 or 64 synchronization signal blocks in one synchronization period. If the receiving terminal has multiple synchronization sources, such as 5 synchronization sources, it needs to receive And after decoding 5*64 synchronization signal blocks, the synchronization source with the highest synchronization priority can be judged and used as a synchronization reference for the terminal on the receiving side, which will bring huge receiver complexity and synchronization detection delay
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[0056] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.
[0057] Such as image 3 As shown, an embodiment of the present invention provides a method for determining a synchronization reference source, which is applied to a receiving terminal, and the method includes:
[0058] Step 31, by detecting the first indication information carried by the through link-primary synchronization signal S-PSS and the through link-secondary synchronization signal S-SSS sent by the synchronization source, or by detecti...
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The invention discloses a synchronization reference source determination method and a terminal, and the method comprises the steps: detecting first indication information carried by a straight through link-main synchronization signal (P-SSS) and a straight through link-auxiliary synchronization signal (S-SSS) transmitted by the synchronization source, or acquiring synchronization priority information of a synchronization source by detecting first indication information carried by a straight through link-main synchronization signal S-PSS and a straight through link-auxiliary synchronization signal S-SSS sent by the synchronization source and second indication information carried by a demodulation reference signal DMRS corresponding to a physical straight-through link broadcast channel PSBCH sent by the synchronization source; and determining a synchronization reference source of the receiving side terminal according to the synchronization priority information of the synchronization source and the first measurement information. According to the scheme provided by the invention, the terminal can obtain the synchronization priority information before decoding the PSBCH, so that the synchronization detection complexity is reduced, the synchronization detection process is simplified, and the synchronization detection speed is increased.
Description
technical field [0001] The present invention relates to the field of communication technologies, in particular to a method for determining a synchronization reference source and a terminal. Background technique [0002] In the 5G NR (NR Radio Access, new wireless access technology) V2X system, PC5 port (Sidelink, direct link) is used for direct communication between terminals. Before the business data transmission, it is first necessary to establish synchronization between the two communicating terminals on the PC5 port (Sidelink). The method of establishing synchronization is that one terminal A sends synchronization and broadcast signals, and another terminal B receives the synchronization and broadcast signals sent by terminal A. Once terminal B receives and demodulates successfully, the two terminals can establish synchronization, which is the next step. Communication is ready. [0003] The synchronization signal of the NR UU port is carried by SSB (Synchronization Sig...
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IPC IPC(8): H04W56/00H04L5/00H04W4/70
Inventor 任晓涛赵锐
Owner DATANG MOBILE COMM EQUIP CO LTD