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Method for sending aperiodic measurement reference signal on backhaul link and relay station

A technology for measuring reference signals and backhaul links, which is applied in the field of relay stations and can solve problems such as the inability of the RN to transmit A-SRS normally, and the inability of the RN to transmit A-SRS.

Active Publication Date: 2017-09-12
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] For the backhaul link, the network side can configure and schedule Un A-SRS transmission for RN in a manner similar to configuring A-SRS for UE. However, since Un uplink transmission is also limited by the configuration of Un UL subframes, RN cannot UE also transmits A-SRS in the corresponding uplink subframe according to the configuration instructions, so the network side triggers Un A-SRS in the way of UE, which may conflict with the configuration of Un UL subframe, so that RN cannot normally transmit A-SRS
There is still no corresponding solution to this problem at present, and the present invention proposes a method for sending A-SRS on the backhaul link for this problem

Method used

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  • Method for sending aperiodic measurement reference signal on backhaul link and relay station
  • Method for sending aperiodic measurement reference signal on backhaul link and relay station
  • Method for sending aperiodic measurement reference signal on backhaul link and relay station

Examples

Experimental program
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Effect test

example 1

[0060]In the FDD system, the eNB instructs the RN macro cell Cell specific SRS subframes to be #0 and #5 subframes of each radio frame through high-layer signaling, and the Un UL subframe is configured as #7 subframe of radio frame k and radio frame k+ #5 subframe of 1, A-SRSI configured for RN SRS =12. According to Table 1, the RN can obtain that the A-SRS period is 10ms, and the subframe offset is 5, that is, the RN specific A-SRSsubframe is #5 subframe of each radio frame.

[0061] The eNB instructs the RN to perform an A-SRS transmission through the R-PDCCH DCI format 0 scheduling in the #3 subframe of the radio frame k. After the RN receives the A-SRS trigger signaling from the eNB in ​​the #3 subframe, the SRS subframe subframe configuration, macro cell Cell specific SRS subframe configuration, and Un UL subframe configuration, RN transmits A-SRS on #5 subframe of radio frame k+1 according to eNB configuration, such as image 3 shown. Among them, the #5 subframe of th...

example 2

[0063] In the TDD system, the eNB instructs the RN macro cell Cell specific SRS subframes to be #1, #3, #6, #8 subframes of each radio frame through high-layer signaling, and the Un UL subframe is configured as #8 subframes of each radio frame Frame, eNB configures A-SRS index I for RN according to Table 2 SRS =13, that is, the period is 5ms, and the subframe offset is 3, that is, the RN specific A-SRS subframe is #3 and #8 subframes of each radio frame.

[0064] The eNB instructs the RN to perform an A-SRS transmission through R-PDCCH DCI format 4 scheduling in the #4 subframe of radio frame k. After the RN receives the A-SRS trigger signaling from the eNB in ​​the #4 subframe, it SRS subframe subframe configuration, macro cell Cell specific SRS subframe configuration, and Un UL subframe configuration, transmit A-SRS on #8 subframe of radio frame k according to eNB configuration, Figure 4 shown. Among them, the #8 subframe of radio frame k is the first uplink subframe that...

example 3

[0066] In the FDD system, the eNB instructs the RN macro cell Cell specific SRS subframes to be #1 and #6 subframes of each radio frame through high-level signaling, and the Un UL subframe is configured as #0 subframe of radio frame k and radio frame k+ 1's #6 subframe. The backhaul link uses the newly defined I SRS The corresponding relationship with the A-SRS subframe period and subframe offset, taking Table 5 as an example, the A-SRS I configured by the eNB for the RN SRS =0, the RN can obtain the A-SRS period as 8ms and the subframe offset as 0 according to Table 5, that is, the RN specific A-SRS subframe is subframes #0, #8, #16, #24, ....

[0067] The eNB instructs the RN to perform an A-SRS transmission through the R-PDCCH DCI format 0 scheduling in the #7 subframe of the radio frame k. After the RN receives the A-SRS trigger signaling from the eNB in ​​the #7 subframe, the SRS subframe subframe configuration, macro cell Cell specific SRS subframe configuration, and U...

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Abstract

Disclosed are a method and relay node for a backhaul link to send an aperiodic sounding reference symbol (A-SRS), for solving the technical problem that there may be a conflict between the Un UL subframe configuration and the Un A-SRS subframe and achieving effective transmission of the Un-SRS. The solution is as follows: a relay node (RN) sending an A-SRS to the network side on the #n' subframe after receiving an A-SRS trigger signalling from the network side at the #n subframe, wherein the #n' subframe is the first subframe satisfying n' = n+4 and belongs to an effective relay node A-SRS subframe (RN specific A-SRS subframe) set and is also an uplink subframe of the backhaul link, or, the subframe is an uplink subframe of the backhaul link and also is a macro cell Cell specific SRS subframe. By way of the present invention, effective transmission of the A-SRS in the backhaul link can be achieved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for sending aperiodic measurement reference signals on a backhaul link in LTE (Long Term Evolution, long-term evolution system) and LTE-A (Long Term Evolution Advanced, advanced long-term evolution system) and relay stations. Background technique [0002] In a network where a relay station (Relay Node, RN) is introduced, such as figure 1 As shown, the link between the evolved base station (eNB) and the macro cell user (Macro User Equipment, M-UE) in the network is called the direct link (Direct Link), and the link between the eNB and the RN is called the backhaul link The link is also called the Un interface, and the link between the RN and the relay domain user (Relay User Equipment, R-UE) is called an access link (Access Link). [0003] When inband-relay is used, that is, when the backhaul link and the access link use the same frequency resourc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/14
CPCH04B7/155H04W24/00H04W84/047
Inventor 杨瑾毕峰吴栓栓梁枫袁明
Owner ZTE CORP