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Method and device for sending frequency deviation indicating signal and generating random access sequence

A random access sequence and signaling signaling technology, applied in the field of communication, can solve the problems of poor detection performance and unsatisfactory actual performance at the receiving end

Active Publication Date: 2013-11-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The generation method of the random access sequence includes support for high-speed mobile users, but the actual performance is not very ideal. When the frequency offset of the user is slightly larger, the detection performance of the receiving end will deteriorate

Method used

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  • Method and device for sending frequency deviation indicating signal and generating random access sequence
  • Method and device for sending frequency deviation indicating signal and generating random access sequence
  • Method and device for sending frequency deviation indicating signal and generating random access sequence

Examples

Experimental program
Comparison scheme
Effect test

specific example 1

[0116] Random access sequence generation and sending process at the sender:

[0117] (1) In a wireless communication system, the system is configured with a high frequency offset flag (High Frequency Offset Flag, HFOF).

[0118] Wherein, the HFOF is described by N bits, and N is a positive integer;

[0119] Further, the HFOF includes at most 2 N HFOF i , Where 0≤i≤2 N -1;

[0120] Further, the HFOF i Used to indicate the size of the frequency offset;

[0121] Further, the HFOF i The corresponding relationship with the frequency offset is configured by the standard or by the system;

[0122] Further, the HFOF i The corresponding relationship with the frequency offset can be described by the following formula:

[0123] FO=(a*f 1 +b)*HFOF i , Or FO=(a*f 1 +b)*(HFOF i +1),

[0124] Where f 1 Is the frequency offset quantization interval; a and b are preset values.

[0125] Further, the f 1 Can be PRACH channel sub-carrier spacing fPRACH

[0126] Further, a, b, f 1 Configured by the standard or b...

specific example 2

[0183] Random access sequence generation and sending process at the sender:

[0184] In a wireless communication system, the data subcarrier spacing f RE , The subcarrier spacing f of the random access channel PRACH , Random access sequence length N ZC .

[0185] (1) The system is configured with High Frequency Offset Flag (HFOF).

[0186] Wherein, the HFOF is described by 2 bits, including at most 4 HFOF values ​​HFOF i , Where 0≤i≤3;

[0187] In this embodiment, FO=f PRACH *HFOF i , Used to indicate the magnitude of frequency deviation, f PRACH Is the PRACH channel subcarrier spacing;

[0188] In this embodiment, it is assumed that it needs to support 2 times f PRACH The frequency deviation of the size, then HFOF="10"

[0189] (2) The base station sends HFOF="10" to the terminal through the downlink channel;

[0190] (3) After receiving HFOF="10", the terminal knows that the random access sequence used needs to support 2 times f PRACH The size of the frequency offset, and generate...

specific example 3

[0241] Random access sequence generation and sending process at the sender:

[0242] In a wireless communication system, the data subcarrier spacing f RE , The subcarrier spacing f of the random access channel PRACH , Random access sequence length N ZC .

[0243] (1) The system is configured with High Frequency Offset Flag (HFOF).

[0244] Wherein, the HFOF is described by 2 bits, including at most 4 HFOF values ​​HFOF i , Where 0≤i≤3;

[0245] In this embodiment, FO=f PRACH *HFOF i , Used to indicate the magnitude of frequency deviation, f PRACH Is the PRACH channel subcarrier spacing;

[0246] In this embodiment, assuming that there is no need to consider the influence of frequency offset, HFOF="00"

[0247] (2) The base station sends HFOF="00" to the terminal through the downlink channel;

[0248] (3) After receiving HFOF="00", the terminal knows that the random access sequence used does not need to consider the influence of frequency offset, and generates the ZC root sequence x ac...

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Abstract

The invention provides a method for sending a frequency deviation indicating signal. The method for sending the frequency deviation indicating signal comprises the step that frequency deviation indicating information is sent out by a first node through a wireless channel. The invention further provides a method for generating a random access sequence. The method for generating the random access sequence comprises the steps that after the frequency deviation indicating information sent by the first node is received by a second node, the random access sequence xu, v (n) is generated according to the formula xu, v (n)=xu((n+Cv)mod NZC); different values of Cv are adopted according to different deviated frequencies indicated by the frequency deviation indicating information. The invention further provides a device for sending the frequency deviation indicating signal and a device for generating the random access sequence.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a method and device for sending frequency offset indication signaling, and a method and device for generating random access sequence. Background technique [0002] With the development of the mobile Internet and the popularization of smart phones, the demand for mobile data traffic is increasing rapidly, and the fast-growing data services pose severe challenges to the transmission capacity of mobile communication networks. According to the forecasts of authoritative organizations, in the next ten years (2011-2020), the mobile data business volume will double every year, and it will increase a thousand times in ten years. As the number of mobile Internet access users continues to increase, users’ demand for mobile data services will also continue to increase, and the types of mobile data services will continue to update accordingly. Different mobile data services require differen...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04L27/26
Inventor 刘锟张晓丹鲁照华罗薇李卫敏
Owner ZTE CORP
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