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Method for transmitting and receiving sounding reference signal in wireless communication system and apparatus therefor

a wireless communication system and reference signal technology, applied in the field of wireless communication system, can solve the problems of needing more advanced mobile communication system development, and achieve the effects of reducing inter-cell interference, reducing inter-cell interference, and increasing the randomization of inter-cell interferen

Active Publication Date: 2022-05-05
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent can efficiently and adaptively reduce inter-cell interference when configuring a group hopping number and a sequence hopping number for SRS sequence transmission. It also increases randomization of inter-cell interference and reduces inter-cell interference through a SRS sequence generated based on a group hopping number and a sequence hopping number configured according to embodiments of the present disclosure. Furthermore, it allows flexible configuration of a group hopping number and a sequence hopping number of respective cells based on situations of the network.

Problems solved by technology

However, as current mobile communication systems suffer resource shortages and users demand even higher-speed services, development of more advanced mobile communication systems is needed.

Method used

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  • Method for transmitting and receiving sounding reference signal in wireless communication system and apparatus therefor
  • Method for transmitting and receiving sounding reference signal in wireless communication system and apparatus therefor
  • Method for transmitting and receiving sounding reference signal in wireless communication system and apparatus therefor

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first embodiment

[0178]A method may be considered, which configures an initialization value (e.g., Cinit) used for group hopping and sequence hopping for sounding reference signal (SRS) transmission on the network using an identifier (ID) based on a UE group. Using the initialization value thus configured, scrambling for the group hopping and the sequence hopping for the SRS transmission may be performed.

[0179]Here, the group hopping may mean sequence hopping between groups and may be referred to as sequence-group hopping, etc. The sequence hopping may mean hopping or shift for a base sequence and may be referred to as base sequence hopping, base sequence shift, etc.

[0180]The identifier based on the UE group may refer to an identifier for distinguishing the UE groups, and may correspond to an identifier (e.g., UE group sequence ID) of a sequence allocated to the UE group, and the like. In the present disclosure, the identifier based on the UE group is hereinafter referred to as a UE group sequence I...

second embodiment

[0192]For each cell, it is assumed that the number of group hopping numbers (i.e., group numbers) u is configured to K, and the number of sequence hopping numbers (i.e., base sequence numbers) v is configured to J. That is, K denotes the number of candidates of the group hopping number, and J denotes the number of candidates of the sequence hopping number.

[0193]In this instance, a method of configuring the K value and the J value considering a relationship between the group hopping number and the sequence hopping number and a length of a SRS sequence may be considered.

[0194]More specifically, the length of the SRS sequence in each cell may be configured to be equal to or greater than K*J or similar to K*J. That is, the K value and the J value may be configured so that the product of corresponding values is similar to the length of the SRS sequence configured for each cell.

[0195]On the contrary, compared to a configured smallest sequence length of a SRS (only for Zadoff-Chu (ZC) sequ...

third embodiment

[0201]As described above, in the existing wireless communication system (e.g., LTE system), the group hopping number and the sequence hopping number were configured only based on a slot index ns.

[0202]On the contrary, the NR system may consider a method of configuring a group hopping number and a sequence hopping number additionally considering a symbol index l′ as well as a slot index, in order to improve a randomization effect of inter-cell interference. More specifically, this embodiment proposes a method of configuring a specific group hopping pattern function and a specific (base) sequence hopping pattern function in order to configure a group hopping number u(ns, l′) and a sequence hopping number v(ns, l′) for each cell.

[0203]In this instance, the specific group hopping pattern function and the specific (base) sequence hopping pattern function may be cell-specifically or UE-specifically provided for each cell. In this case, higher layer signalling (e.g., RRC signalling, MAC-CE...

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Abstract

A method for transmitting and receiving a radio signal in a wireless communication system and a device therefor are disclosed. A method for receiving, by a base station, a sounding reference signal (SRS) in the wireless communication system includes transmitting, to a user equipment (UE), configuration information for transmission of the SRS; and receiving, from the UE, the SRS transmitted based on the configuration information. The configuration information includes group hopping information and sequence hopping information for sequence hopping of the SRS. A sequence length of the SRS is based on a product of a number of candidates of the group hopping information and a number of candidates of the sequence hopping information. The number of candidates of the group hopping information and the number of candidates of the sequence hopping information are configured based on a number of neighboring cells of the base station.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a wireless communication system, and more particularly to a method for transmitting and receiving a sounding reference signal and a device supporting the same.BACKGROUND ART[0002]Mobile communication systems have been generally developed to provide voice services while guaranteeing user mobility. Such mobile communication systems have gradually expanded their coverage from voice services through data services up to high-speed data services. However, as current mobile communication systems suffer resource shortages and users demand even higher-speed services, development of more advanced mobile communication systems is needed.[0003]The requirements of the next-generation mobile communication system may include supporting huge data traffic, a remarkable increase in the transfer rate of each user, the accommodation of a significantly increased number of connection devices, very low end-to-end latency, and high energy efficiency. To...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04L5/00H04B1/692
CPCH04L5/0048H04B1/692H04L5/0051H04L5/0012H04L5/0073H04L27/2613H04J11/005H04L5/0091H04L5/14H04L5/0023
Inventor CHOI, KUKHEONKANG, JIWONKIM, KYUSEOKLEE, KILBOMCHUNG, JAEHOON
Owner LG ELECTRONICS INC