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Method, device and system for sending uplink sounding reference signal

A technology for detecting reference signals and signals, applied in wireless communication, communication between multiple stations, electrical components, etc., can solve the problem of not being able to know the status information of the downlink channel

Active Publication Date: 2010-07-07
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the existing SRS scheme, the base station obtains the state information of the downlink channel according to the symmetrical characteristics of the uplink and downlink channels. The base station can only obtain the state information of the downlink channel corresponding to the uplink carrier, and cannot obtain the state information of the downlink channel for other downlink carriers.

Method used

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  • Method, device and system for sending uplink sounding reference signal
  • Method, device and system for sending uplink sounding reference signal
  • Method, device and system for sending uplink sounding reference signal

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1: Insert and send SRS signals of one or more non-working carriers according to certain rules (communication protocol agreement or signaling indication configuration) within the time interval for sending SRS signals of two adjacent working carriers. The traversal of the system bandwidth or part of the bandwidth is achieved within a certain period of time. In any subframe between adjacent subframes that transmit SRS signals on the working carrier, at most one or N non-working carriers may be determined as non-working carriers for sending SRS signals on the subframe. N is the number of non-working carriers. The subframes for sending SRS signals on each non-working carrier may have the same time period or different time periods.

[0035] Figure 4 A schematic diagram of time-frequency resource distribution for sending SRS signals according to Embodiment 1 of the present invention is shown, wherein each grid represents a subframe of a subcarrier, and the time l...

Embodiment 2

[0036] Embodiment 2: At the time position of the determined subframe where the working carrier sends the SRS signal, at most one or N non-working carriers are selected as the non-working carrier for sending the SRS signal. N is the number of non-working carriers. The number of SRS information sent by the non-working carrier is determined by the communication protocol, the signaling indication configuration of the base station, or the user equipment according to preset rules.

[0037] Preferably, the subframes for sending SRS signals on each non-working carrier can be determined separately, so that the subframes for sending SRS signals on different non-working carriers are different from each other, but the subframes for sending SRS signals on each non-working carrier are working The subframe in which the carrier sends the SRS signal. For different non-working carriers, the time periods of the subframes in which the SRS signals are sent may be the same or different.

[0038] ...

Embodiment 3

[0039] Embodiment 3: Configure subframes for sending SRS signals on non-working carriers according to instruction information from the base station.

[0040] Image 6 It is a schematic diagram of time-frequency resource distribution for sending SRS signals according to Embodiment 3 of the present invention. The user equipment receives the indication information carrying the non-working carrier identifier and the subframe identifier from the base station, and uses the subframe corresponding to the non-working carrier identifier and the subframe identifier as the subframe for sending the SRS signal on the non-working carrier.

[0041]After the subframes for sending SRS signals on non-working carriers are determined according to the methods in the above embodiments, when the number of carriers sending SRS signals in the same subframe is subject to certain restrictions (such as limited power, single carrier, etc.), or the number of working carriers and When the non-working carrie...

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Abstract

The invention discloses a method for sending an uplink sounding reference signal in a multi-carrier system, and the method is applied in the multi-carrier system and comprises the following steps: determining the time position of sending the uplink sounding reference signal (SRS) on a working carrier; determining the time position of sending the SRS signal on a non-working carrier based on the principle of time division multiple access (TDM) in the multi-carrier; and sending the SRS signal in the determined time position of the working carrier and the time position of the non-working carrier,wherein each time position comprises a sign position or a sub-frame and the like. The invention further discloses a user equipment which comprises a working carrier time position determining unit, a non-working carrier time position determining unit and an SRS signal sending unit. The scheme of the invention can achieve the purpose of sending the SRS signal at a certain bandwidth stipulated by all carriers of the multi-carrier system or the communication protocol within a certain time.

Description

technical field [0001] The present invention relates to the technical field of multi-carrier wireless communication, in particular to a method, device and system for sending an uplink sounding reference signal. Background technique [0002] In the Long Term Evolution (LTE) system, the uplink sounding reference signal (Sounding Reference Signals, SRS) is the uplink signal sent by the user equipment (UE), which performs uplink timing detection, power control, uplink frequency domain scheduling, and link adaptation for the base station etc. provide channel state information. For a time division duplex (TDD) system, when the downlink adopts preprocessing-based multiple input output (MIMO) transmission, the base station can use the SRS signal for channel estimation, and then use the symmetric characteristics of the uplink and downlink channels to obtain the downlink channel state information (CSI) . [0003] In the current LTE specification, the transmission of the uplink sound...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04W72/00
Inventor 喻晓冬肖国军潘学明索士强
Owner DATANG MOBILE COMM EQUIP CO LTD
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