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Secondary synchronization sequence generating method, detection method, base station and user equipment

A technology of secondary synchronization sequence and base station, which is applied in the field of communication and can solve problems such as long delay

Active Publication Date: 2018-11-13
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the NR system is also combined with several cycles of synchronization signals for detection in the LTE system, the delay will be longer

Method used

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  • Secondary synchronization sequence generating method, detection method, base station and user equipment
  • Secondary synchronization sequence generating method, detection method, base station and user equipment
  • Secondary synchronization sequence generating method, detection method, base station and user equipment

Examples

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Comparison scheme
Effect test

no. 1 example

[0115] like figure 1 As shown, an embodiment of the present invention provides a method for generating a secondary synchronization sequence, which specifically includes the following steps:

[0116] Step 11: Generate a scrambling sequence for the primary synchronization signal.

[0117] Wherein, the generation of the secondary synchronization sequence is completed by the base station. Specifically, the base station may generate and send the secondary synchronization sequence every preset time interval, or the base station may generate and send the secondary synchronization sequence once through configuration. When the user equipment starts up and needs to synchronize with the system network, or when the user equipment drops downlink during use (ie, downlink out-of-sync), the user equipment can receive the secondary synchronization sequence sent by the base station to perform the subsequent synchronization process.

[0118] However, in the embodiment of the present invention,...

no. 2 example

[0131] like figure 2 As shown, the second embodiment of the present invention provides a method for generating a secondary synchronization sequence. When the number of scrambling sequences of the primary synchronization signal is three and the number of m sequences is three, the secondary synchronization sequence of the embodiment of the present invention is The generation method of the synchronization sequence specifically includes:

[0132] Step 21: Generate a scrambling sequence of the primary synchronization signal.

[0133] Preferably, step 21 includes:

[0134] According to the first preset formula Calculate the first reference sequence x(h), where x(h) represents the h-th element in the first reference sequence, and the value of h is an integer from 0 to N-1 in sequence, The value of the value is an integer from 0 to N-8, and the binary system composed of x(0), x(1), x(2), x(3), x(4), x(5), and x(6) sequence is a non-zero sequence constant;

[0135] According to...

no. 3 example

[0177] like image 3 As shown, the third embodiment of the present invention provides a method for generating a secondary synchronization sequence. When the number of scrambling sequences of the primary synchronization signal is three and the number of m sequences is six, the secondary synchronization sequence of the embodiment of the present invention is The generation method of the synchronization sequence specifically includes:

[0178] Step 31: Generate a scrambling sequence of the primary synchronization signal.

[0179] Preferably, step 31 includes:

[0180] According to the first preset formula Calculate the first reference sequence x(h), where x(h) represents the h-th element in the first reference sequence, and the value of h is an integer from 0 to N-1 in sequence, The value of the value is an integer from 0 to N-8, and the binary system composed of x(0), x(1), x(2), x(3), x(4), x(5), and x(6) sequence is a non-zero sequence constant;

[0181] According to the...

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Abstract

The invention provides a secondary synchronization sequence generating method, a detection method, a base station and user equipment. The secondary synchronization sequence generating method comprisesthe following steps: generating a scramble sequence of a main synchronization signal; generating an m sequence according to predetermined primitive polynomials, wherein the predetermined primitive polynomials include at least two primitive polynomials, and an m sequence pair consisting of m sequences generated by any two primitive polynomials is an m sequence preferable pair; and generating the secondary synchronization sequence according to the scramble sequence of the main synchronization signal and the m sequence. The user equipment receives a synchronization signal transmitted by the basestation, and performs descrambling and relevant detection on the signal in order to realize time frequency synchronization and obtain cell identification information. According to the scheme of the invention, the secondary synchronization sequence with relatively low cross-correlation can be generated, so that misjudgment on sequence detection in a synchronous detection process is avoided, and the detection accuracy is increased.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a method for generating and detecting a secondary synchronization sequence, a base station and a user equipment. Background technique [0002] In LTE, the secondary synchronization sequence is generated by two 31-length m sequences, and 168 sequences can be generated. Combined with the three primary synchronization sequences, 504 different physical layer cell identities can be distinguished correspondingly. The advantage of using two short sequences is that more IDs can be represented by the joint detection of the two sequences, and the detection complexity is low. However, the detection accuracy of joint detection is low. [0003] In addition, in the NR system, the primary and secondary synchronization sequences are both 127 long. Compared with the 63-point long synchronization sequence of LTE, the synchronization sequence of NR is doubled. In addition, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04J3/06
CPCH04J3/0602H04J3/0608H04W56/00
Inventor 赵铮达人任斌郑方政潘学明
Owner DATANG MOBILE COMM EQUIP CO LTD
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