User equipment, base station, data channel sending method, and data channel receiving method

Patent metadata

Field	Value
Publication number	US-10524291-B2
Application number	US-201815934461-A
Country	US
Kind code	B2
Filing date	Mar 23, 2018
Priority date	Sep 25, 2015
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

Embodiments of the present disclosure provide a data channel sending method. In the method, a base station starts a clear channel assessment (CCA) on a data channel for a to-be-sent data channel. If the CCA on the data channel succeeds, the base station sends the data channel in a first subframe within a time window, where the data channel performs rate matching based on a reference signal (RS). The RS includes a first RS or a second RS. The first RS occupies continuous OFDM symbols in a subframe, and the second RS occupies discontinuous OFDM symbols in a subframe. The time window is a preset time window used to send the first RS, and the first RS is used by a user equipment (UE) to perform cell identification and/or a radio resource management (RRM) measurement on a cell served by the base station.

First claim

What is claimed is:

1. A data channel receiving method, comprising:
determining, by a user equipment (UE), a time window according to a time window configured by a base station;
receiving, by the UE, a data channel in a first subframe within the time window, wherein the data channel performs rate matching based on a reference signal (RS), wherein the RS comprises a first RS or a second RS, the first RS occupies continuous orthogonal frequency-division multiplexing (OFDM) symbols in a subframe, and the second RS occupies discontinuous OFDM symbols in a subframe, and wherein the time window is a preset time window used to send the first RS, and the first RS is used by the UE to perform cell identification and/or a radio resource management (RRM) measurement on a cell served by the base station; and
receiving, by the UE, a control channel in the first subframe, wherein the control channel carries scheduling information of the data channel, the control channel performs rate matching based on the first RS, the scheduling information comprises rate matching indication information, and the rate matching indication information is used to instruct the data channel to perform rate matching based on the first RS or the second RS.

2. The method according to claim 1 , wherein
if an index number of the first subframe is 0 or 5, the RS is the first RS; and
if the index number of the first subframe is not 0 or 5, the RS is the second RS.

3. The method according to claim 1 , further comprising:
determining, by the UE, a first time point in the first subframe of the data channel and/or the control channel that schedules the data channel; and
if the first time point is not later than a start sending time point of the first RS in the first subframe, the RS is the first RS; or
if the first time point is not earlier than a start sending time point of a synchronization signal in the first RS in the first subframe, the RS is the second RS or a part of the second RS.

4. A base station, comprising:
a computer readable storage medium storing instructions; and
computer hardware configured to execute the instructions to cause the base station to:
start a clear channel assessment (CCA) on a data channel for a to-be-sent data channel;
send the data channel in a first subframe within a time window according to a result that is of the successful CCA on the data channel, wherein the data channel performs rate matching based on a reference signal (RS), wherein the RS comprises a first RS or a second RS, the first RS occupies continuous orthogonal frequency-division multiplexing (OFDM) symbols in a subframe, and the second RS occupies discontinuous OFDM symbols in a subframe, and wherein the time window is a preset time window used to send the first RS, and the first RS is used by a user equipment (UE) to perform cell identification and/or a radio resource management (RRM) measurement on a cell served by the base station; and
send a control channel in the first subframe, wherein the control channel carries scheduling information of the data channel, the control channel performs rate matching based on the first RS, the scheduling information comprises rate matching indication information, and the rate matching indication information is used to instruct the data channel to perform rate matching based on the first RS or the second RS.

5. The base station according to claim 4 , wherein
if an index number of the first subframe is 0 or 5, the RS is the first RS; and
if the index number of the first subframe is not 0 or 5, the RS is the second RS.

6. The base station according to claim 4 , wherein
if a result that the CCA on the data channel fails but a CCA on the first RS succeeds, the base station is configured to send the first RS in a maximum of one subframe within the time window, but does not send the data channel.

7. The base station according to claim 4 , wherein a sending time point, determined according to the successful CCA that is on the data channel of the data channel and/or the control channel that schedules the data channel is a first time point; and
if the first time point is not later than a start sending time point of the first RS in the first subframe, the RS is the first RS; or
if the first time point is not earlier than a start sending time point of a synchronization signal in the first RS in the first subframe, the RS is the second RS or a part of the second RS.

8. A user equipment (UE), comprising:
a computer readable storage medium storing instructions; and
computer hardware configured to execute the instructions to cause the UE to:
receive a time window from a base station;
receive a data channel in a first subframe within the time window, wherein the data channel performs rate matching based on a reference signal (RS), wherein the RS comprises a first RS or a second RS, the first RS occupies continuous orthogonal frequency-division multiplexing (OFDM) symbols in a subframe, and the second RS occupies discontinuous OFDM symbols in a subframe, and wherein the time window is a preset time window used to send the first RS, and the first RS is used by the UE to perform cell identification and/or a radio resource management (RRM) measurement on a cell served by the base station; and
determine a first time point, in the first subframe, of the data channel and/or the control channel that schedules the data channel;
wherein:
if the first time point is not later than a start sending time point of the first RS in the first subframe, the RS is the first RS; or
if the first time point is not earlier than a start sending time point of a synchronization signal in the first RS in the first subframe, the RS is the second RS or a part of the second RS.

9. The UE according to claim 8 , wherein the computer hardware executing the instructions further causes the UE to:
receive a control channel in the first subframe, wherein the control channel carries scheduling information of the data channel, the control channel performs rate matching based on the first RS, the scheduling information comprises rate matching indication information, and the rate matching indication information is used to instruct the data channel to perform rate matching based on the first RS or the second RS.

10. The UE according to claim 8 , wherein
if an index number of the first subframe is 0 or 5, the RS is the first RS; and
if the index number of the first subframe is not 0 or 5, the RS is the second RS.

Assignees

• Huawei Tech Co Ltd

Inventors

• Guan Lei
• Li Qiang
• Zheng Juan

Classifications

• H04L1/0013

  Rate matching, e.g. puncturing or repetition of code symbols · CPC title

• H04W74/08

  Non-scheduled access, e.g. ALOHA (hybrid access H04W74/02) · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04W72/04

  Wireless resource allocation · CPC title

• H04L5/0057

  Physical resource allocation for CQI · CPC title