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Method and device for transmitting sounding reference signal (SRS)

A technology for sounding reference signals and sending methods, which is applied in the field of sending methods and devices for sounding reference signals, and can solve the problems affecting the timing of uplink transmission of unlicensed carriers and the inability to ensure selective scheduling of uplink frequency of base stations, etc.

Inactive Publication Date: 2017-07-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] If the above problems cannot be solved well, it will directly affect the timing of uplink transmission in unlicensed carriers, and cannot guarantee the uplink frequency selective scheduling of the base station (allocating resources with better channel conditions to uplink transmission), modulation and coding measurement (Modulation and Coding Scheme, referred to as MCS) determination, etc.

Method used

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  • Method and device for transmitting sounding reference signal (SRS)
  • Method and device for transmitting sounding reference signal (SRS)
  • Method and device for transmitting sounding reference signal (SRS)

Examples

Experimental program
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Embodiment 1

[0321] In this preferred embodiment, a location where the transmission device on the unlicensed carrier performs LBT / CCA detection and / or a sending location of the Sounding Reference Signal SRS and / or the moment when the physical uplink shared channel PUSCH starts to transmit is given. In this embodiment, the transmission device is user transmission equipment UE.

[0322] The first content: about the possible location and acquisition method of the user equipment UE performing LBT or CCA detection.

[0323] Such as image 3 As shown, for the uplink, the possible positions where the user equipment UE performs LBT or CCA detection include at least one of the following:

[0324] The LBT or CCA is always located within the last k OFDM symbols in the previous subframe of the scheduled subframe;

[0325] LBT or CCA is always located within the first s OFDM symbols in the scheduling subframe;

[0326] The LBT or CCA is always located within the last k1 OFDM symbols in the previous ...

Embodiment 2

[0374] In this preferred embodiment, a method for multiplexing or simultaneous transmission of a sounding reference signal SRS and a PUSCH sent by a transmission device on an unlicensed carrier is given. In this embodiment, the transmission device is user transmission equipment UE.

[0375] The following will mainly introduce the SRS and PUSCH multiplexing transmission method (that is, the SRS signal of the user equipment itself and its own PUSCH multiplexing transmission) method from three aspects:

[0376] ①PUSCH starts transmission from the subframe boundary.

[0377] That is, PUSCH always starts transmission from symbol 0. Here, assuming that the uplink LBT or CCA detection position is always within the last k symbols in the previous subframe of the scheduled subframe (for example, k is 1), the SRS transmission can be as follows:

[0378] When the user equipment successfully executes LBT in the last symbol of the previous subframe of the scheduled subframe, it will start...

Embodiment 3

[0420] In this preferred embodiment, a method for multiplexing or simultaneous transmission of a sounding reference signal (SRS) sent by a user equipment on an unlicensed carrier and PUSCH of other user equipment is given.

[0421] It is assumed that the PUSCH is transmitted from the subframe boundary, and the LBT or CCA execution position is within the last k symbols of the subframe before the scheduled subframe. For example, k is 1.

[0422] When the UE (such as UE1) in the scheduled subframe completes the LBT within the LBT or CCA execution position, then the PUSCH is sent on the scheduled subframe. At this time, the UE in the scheduled subframe may need to send an SRS signal, or there may be no SRS to send. At this time, another UE (such as UE2) needs to send an SRS signal, but there is no PUSCH to send, then there are two processing methods:

[0423] Mode 1: UE2 executes LBT. If the LBT is successful, the SRS signal can only be sent.

[0424] in:

[0425] The positio...

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Abstract

The application provides a method and device for transmitting a sounding reference signal (SRS), relating to the field of wireless communication. The method comprises the following steps: competing the use rights of unauthorized carriers according to listen before talk (LBT) or clear channel assessment (CCA) detection; and when the use rights of the unauthorized carriers are successfully competed, transmitting the SRS on the unauthorized carriers. The method for transmitting the SRS when the SRS and a PUSCH are synchronously or asynchronously transmitted and partial sub-frames are uplinked is provided, and more SRS transmission opportunities are provided; and an SRS sequence is taken as an occupied signal during downlink transmission, and thus the design of the occupied signal can be simplified.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for sending a sounding reference signal. Background technique [0002] With the rapid growth of data services, the data transmission pressure on licensed spectrum carriers is also increasing. Therefore, using unlicensed spectrum carriers to share the data traffic in licensed carriers has become a follow-up Long Term Evolution (LTE ) is an important evolutionary direction of development. [0003] The characteristics of unlicensed spectrum are: unlicensed spectrum does not need to be purchased, spectrum resources are zero-cost, and have the characteristics of free / low cost; individuals and enterprises can participate in deployment, equipment manufacturers can deploy equipment at will, and have low access requirements. The feature of low cost; the 5GHz, 2.4GHz and other frequency bands in the unlicensed spectrum can be used, which has the feature of...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04L25/02H04W72/12
CPCH04B7/0697H04L25/0202H04W72/542H04W72/21H04W74/0808H04L5/0051H04L27/0006H04W16/14H04L5/0007H04L25/0226H04W72/23H04L5/0037H04W72/0446H04W72/121
Inventor 杨玲苟伟赵亚军彭佛才
Owner ZTE CORP
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