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Method and apparatus for transmitting a sounding reference signal

A technology for detecting reference signals and user equipment. It is used in pilot signal allocation, link quality-based transmission modification, wireless communication, etc., and can solve problems such as degraded peak-to-average power ratio and increased battery consumption.

Active Publication Date: 2013-07-03
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simultaneous transmission of uplink control signals and SRS can lead to increased battery consumption due to degradation of peak-to-average power ratio (PAPR) properties of user equipment

Method used

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  • Method and apparatus for transmitting a sounding reference signal
  • Method and apparatus for transmitting a sounding reference signal
  • Method and apparatus for transmitting a sounding reference signal

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0078]

[0079] SRS and PUCCH can be simultaneously transmitted in the same subframe. For example, PUCCH can be transmitted in the primary cell, and SRS can be transmitted in the secondary cell.

[0080] When PUCCH and SRS are simultaneously transmitted, the transmission power may need to be adjusted. This is because the total transmission power of PUCCH and SRS may exceed the maximum transmission power. This can be expressed by the formula.

[0081] [Formula 1]

[0082] { w 1 ( i ) P PUCCH , c ( i ) + w 2 ( i ) X c P SRS , c ( i ) } ≤ P CMAX , c ( i )

[0083] Here, P PUCCH,c (i) represents the transmission power of PUCCH in subframe i of serving cell c, w 1 (i) means P PUCCH,c (i) the scaling parameter, P SRS,c (i) represents the transmission power of SRS in subframe i of serving cell c, w 2 (i) means P SRS,c (i) the scaling parameter, and P CMAX,c (i) represents the maxi...

no. 2 approach

[0094]

[0095] SRS and PUSCH can be simultaneously transmitted in the same serving cell or in the same subframe of different serving cells.

[0096] Figure 5 An example of transmission of SRS and PUSCH is shown.

[0097] PUSCH is transmitted in serving cell #1. PUSCH and SRS are transmitted in serving cell #2. The PUSCH is punctured in the last OFDM symbol of the subframe of serving cell #2 that transmits the SRS. However, PUSCH is not punctured in the last OFDM symbol of the subframe of serving cell #1.

[0098] This is to avoid data loss caused by puncturing the PUSCH in another serving cell other than the serving cell that transmits the SRS even when the single carrier attribute is not satisfied.

[0099] Punching the PUSCH is only applied to the serving cell that sends the SRS. PUSCH puncturing is not performed in the serving cell that does not transmit SRS.

[0100] When the total transmission power of PUSCH and SRS exceeds the maximum transmission power, the following operat...

no. 3 approach

[0105] [Third Embodiment: Transmission of PUSCH / PUCCH / SRS]

[0106] The multiplexing of UL channels (PUSCH and / or PUCCH) and SRS will be proposed.

[0107] First, assume that the UE is set to a mode that allows simultaneous transmission of PUSCH and PUCCH. PUSCH, PUCCH and SRS can be sent at the same time.

[0108] The total transmission power of PUSCH, PUCCH, and SRS can be adjusted as follows, so that the total transmission power does not exceed the maximum transmission power.

[0109] [Equation 2]

[0110] { w 1 ( i ) P PUCCH , c ( i ) + w 2 ( i ) P mPUSCH , c ( i ) + w 3 ( i ) X c P PUSCH , c ( i ) + w 4 ( i ) X c P SRS , c ( i ) } ≤ P CMAX , c ( i )

[0111] Here, P mPUSCH,c (i) represents the transmission power of the multiplexed PUSCH in subframe i of serving cell c, and P PUSCH,c (i) represents ...

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Abstract

Provided are a method and apparatus for transmitting a sounding reference signal. A terminal receives, from a base station, a configuration for periodic channel quality indicator (CQI) transmission and a configuration for sound reference signal (SRS) transmission. When a positive SRS request is detected, the terminal determines an SRS subframe which satisfies the configuration for SRS transmission. When the periodically transmitted CQI is triggered in the SRS subframe, the terminal transmits the SRS in the SRS subframe to the base station.

Description

Technical field [0001] The present invention relates to wireless communication, and more specifically, to a method and equipment for transmitting a probe reference signal in a wireless communication system. Background technique [0002] The Long Term Evolution System (LTE) Technical Specification (TS) Release 8 based on the Third Generation Partnership Project (3GPP) is a very promising next-generation mobile communication standard. [0003] As disclosed in 3GPP TS36.211V8.7.0 (2009-05) "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation (Release8)", the physical channels of LTE can be divided into downlink channels (ie, physical Downlink shared channel (PDSCH) and physical downlink control channel (PDCCH)) and uplink channels (ie, physical uplink shared channel (PUSCH) and physical uplink control channel (PUCCH)). [0004] PUCCH is an uplink control channel used to transmit uplink control signals such as hybrid automatic repeat request (HARQ) ackn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04B7/26H04L1/18H04W88/02
CPCH04L1/0026H04L1/0027H04L5/0051H04L5/0057H04L5/001H04L5/0055H04W8/22H04W24/02H04W48/16H04W72/12H04L5/0048H04W52/30H04W72/21H04W72/0446H04W52/346H04L27/2646H04W72/0473H04L5/0007
Inventor 徐东延金民奎梁锡喆安俊基
Owner LG ELECTRONICS INC