Method and device for transmitting and receiving channel sounding reference signals

A technology for sounding reference signals and reference signals, which is applied in the field of sounding reference signals for sending and receiving channels, to achieve the effect of reducing time-frequency code resources

Active Publication Date: 2011-11-16
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using the same precoding matrix provided in the prior art to encode the SRS that helps uplink transmission and downlink transmission and transmit it on the channel to realize the estimation of the channel response value cannot help the communication system to achieve better performance at the same time. Good upstream and downstream transmission

Method used

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  • Method and device for transmitting and receiving channel sounding reference signals
  • Method and device for transmitting and receiving channel sounding reference signals
  • Method and device for transmitting and receiving channel sounding reference signals

Examples

Experimental program
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Embodiment 1

[0034] The process of sending SRS in Embodiment 1 includes the following three sub-processes SRS_0, SRS_UL and SRS_DL, wherein the detailed description of each process is as follows:

[0035] SRS_0: In this process, SRS is sent directly without precoding matrix coding, so the SRS sent in this process is Non-precoded SRS, and the channel information obtained based on this Non-precoded SRS can be used to help determine The precoding matrix information required in SRS_UL. In this sub-procedure SRS_0, UE’s transmission of SRS can be periodic or aperiodic. It can also be used to notify UE to send SRS after receiving After the notification message is sent, after receiving the Non-precoded SRS sent in the sub-procedure SRS_0, the base station can determine the first precoding matrix information required for sending the SRS in the sub-procedure SRS_UL according to the Non-precoded SRS, And determine the second precoding matrix information required when sending the SRS in the subproces...

Embodiment 2

[0046] In the second embodiment, the SRS transmission scheme may include four sub-processes, which are respectively: SRS_0_UL, SRS_0_DL, SRS_UL and SRS_DL, wherein, the definition of the SRS_UL and SRS_DL sub-processes is the same as that of the above-mentioned embodiment 1, and will not be repeated here, but implemented SRS_0 in Example 1 is divided into two parts to obtain SRS_0_UL and SRS_0_DL, which correspond to SRS_UL and SRS_DL sub-processes respectively. It should be noted that the process of sending SRS in SRS_0_UL and SRS_0_DL and the function of the sent SRS are similar to those in Embodiment 1. , the difference is only that: the bandwidth for sending SRS in SRS_0_UL only needs to include the bandwidth for sending SRS in SRS_UL; at the same time, the bandwidth for sending SRS in SRS_0_DL only needs to include the bandwidth for sending SRS in SRS_DL.

[0047] Similar to Embodiment 1, from the perspective of transmission resources, the four sub-processes of Embodiment ...

Embodiment 3

[0049]In the third embodiment, the SRS_0 sub-procedure in the first embodiment can be integrated into the SRS_UL sub-process. For example, in the SRS_UL sub-process, the precoding used by the SRS at some SC-FDMA symbol positions can be selected as a specific Non-precoded SRS transmission is realized in the form of , so the SRSs at these SC-FDMA symbol positions can be regarded as the Non-precoded SRSs that need to be sent in SRS_0. It should be noted that the periodic selection of the above-mentioned SC-FDMA symbols for sending Non-precoded SRS can be realized through semi-static configuration of the system, or an aperiodic way can be adopted, and the base station sends signaling to the UE Notify the UE to select the aforementioned SC-FDMA symbols for sending the Non-precoded SRS in a manner. For the scheme of integrating the SRS_0 sub-process into the SRS_UL sub-process proposed in Embodiment 3, for the case where the UE uses two transmit antennas, the following transmission ...

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Abstract

The invention discloses a method and device for transmitting and receiving channel sounding reference signals, which are used for reducing required time-frequency code resources for transmitting an SRS (Sounding Reference Signal) and simultaneously assisting a communication system to realize uplink and downlink transmissions with better performances. The method comprises the following steps: a user terminal determines a first pre-coding matrix used for coding a channel sounding reference signal for assisting the uplink transmission and a second pre-coding matrix used for coding the channel sounding reference signal for assisting the downlink transmission; the user terminal uses the first pre-coding matrix and the second pre-coding matrix to respectively code the channel sounding reference signals so as to obtain a first channel sounding reference signal and a second channel sounding reference signal; and the user terminal transmits the first channel sounding reference signal and the second channel sounding reference signal to a base station.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for sending and receiving channel sounding reference signals. Background technique [0002] In a Long Term Evolution (LTE, Long Term Evolution) system, in order to realize uplink frequency domain scheduling, a user terminal (UE, User Equipment) needs to send a demodulation reference signal within its own data transmission bandwidth, and also needs to transmit The channel sounding reference signal (SRS, Sounding Reference Signal) is sent in the bandwidth with a larger data transmission bandwidth to detect the channel, so as to achieve the purpose of helping the base station to allocate uplink transmission resources to the UE. [0003] In the subsequent evolved LTE-A system, the UE can use multiple transmit antennas (typically 1, 2, and 4) to send SRS, but this requires the system to configure more SRS time-frequency code resources to Perform SRS transmi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 史志华刘建军王启星刘光毅陈奎林
Owner CHINA MOBILE COMM GRP CO LTD
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