Method of transmitting sounding reference signal in wireless communication system

A technology for detecting reference signals and wireless communication systems, which is applied in multiplexing communication, orthogonal multiplexing systems, electrical components, etc., can solve problems such as difficulty in maintaining single-carrier characteristics, difficulty in improving frequency efficiency, etc., and achieve reduction Effects of battery consumption, reduced scheduling overhead, and improved spectral efficiency

Active Publication Date: 2009-12-30
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to maintain single-carrier characteristics when sending sounding reference signals on the uplink control channel
Also, if the uplink control signal and sounding reference signal are transmitted separately, it is difficult to improve the frequency efficiency

Method used

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  • Method of transmitting sounding reference signal in wireless communication system
  • Method of transmitting sounding reference signal in wireless communication system
  • Method of transmitting sounding reference signal in wireless communication system

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0116] First Embodiment: Operation of Two Types of PUCCHs

[0117]Two types of PUCCH are defined according to coexistence with SRS in one subframe. For example, Type 1 control channel (or symmetric control channel) cannot coexist with SRS, and Type 2 control channel (or asymmetric control channel) can coexist with SRS.

[0118] Figure 12 An example of two types of PUCCH is shown. The type 1 control channel is a general PUCCH which is used for an ACK / NACK channel when it is not necessary to simultaneously transmit an ACK / NACK signal and an SRS in at least one resource block of any subframe. During a subframe using a type-1 control channel, another UE may transmit an SRS by using a resource block. The type 2 control channel is an optional PUCCH provided in consideration of the transmission of the SRS. The first slot includes SC-FDMA symbols punctured to transmit SRS. A spreading factor (SF) of a region for transmitting an ACK / NACK signal is 3 in the first slot and 4 in t...

no. 2 example

[0132] Second embodiment: Scheduling performed by BS

[0133] The BS performs scheduling so that the UE does not transmit uplink control information and the SRS at the same time.

[0134] Figure 20 An example of a scheduling method performed by a BS is shown. If UE1 wants to send SRS in a specific subframe, the BS prevents UE1 from sending ACK / NACK signals on the PUCCH in the subframe. On the contrary, the BS schedules such that another UE other than UE1 transmits an ACK / NACK signal in the subframe. That is, the BS performs scheduling such that a UE cannot simultaneously transmit the SRS in one subframe and the uplink control information on the PUCCH. This can be achieved by using additional signaling or by sending a predetermined SRS.

[0135] On the contrary, if there is no need to restrict downlink transmission for UE1, the BS may prevent SRS from being transmitted in the subframe.

no. 3 example

[0136] The third embodiment: operation of a single type of PUCCH

[0137] The PUCCH in use may be designed such that uplink control information and SRS are not transmitted through the same resource region. PUCCH has the same structure regardless of whether SRS is transmitted or not. That is, on the assumption that when SRS is transmitted, a specific resource region (for example, SC-FDMA symbol(s)) designated only for SRS transmission is always used, regardless of whether SRS is transmitted, PUCCH has such a structure : In this structure, the SRS is transmitted only through the specific resource region, and the control signal is transmitted only through the remaining regions except the specific resource region.

[0138] For this, the aforementioned asymmetric control channel structure can be used as a fixed PUCCH structure. For example, in an ACK / NACK channel, the first slot uses 3 demodulation reference signal symbols and 3 ACK / NACK symbols, and the remaining one symbol is...

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Abstract

A method of transmitting a sounding reference signal includes generating a physical uplink control channel (PUCCH) carrying uplink control information on a subframe, the subframe comprising a plurality of SC-FDMA(single carrier-frequency division multiple access) symbols, wherein the uplink control information is punctured on one SC-FDMA symbol in the subframe, and transmitting simultaneously the uplink control information on the PUCCH and a sounding reference signal on the punctured SC-FDMA symbol. The uplink control information and the sounding reference signal can be simultaneously transmitted without affecting a single carrier characteristic.

Description

technical field [0001] The present invention relates to wireless communication, and more particularly, to a method of transmitting a sounding reference signal in a wireless communication system. Background technique [0002] In next-generation wireless communication systems, multimedia data can be transmitted at high speed and high quality with limited radio resources. To achieve this goal, spectral efficiency needs to be maximized since radio channels have limited bandwidth. In addition, inter-symbol interference and frequency selective fading that occur during high-speed transmission need to be overcome. [0003] In order to improve the performance of a wireless communication system, a closed-loop transmission scheme using channel conditions between a base station (BS) and a user equipment (UE) has been introduced. Adaptive Modulation and Coding (AMC) schemes improve link performance by adjusting the Modulation and Coding Scheme (MCS) using feedback of channel condition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00
Inventor 金学成金奉会尹宁佑金沂濬卢东昱李大远尹硕铉安俊基徐东延
Owner LG ELECTRONICS INC
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