US 11,057,094 B2Granted

Channel state information obtaining method and device

AssigneeHuawei Technologies Co., Ltd.

InventorsXiaoyan Bi, Dageng Chen, Jian Li

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Abstract

Embodiments of the present invention provide a channel state information obtaining method and a device, where the method includes: determining, by a base station according to radio resource usage, a special timeslot in a frequency range used for downlink data transmission; sending special-timeslot configuration information to user equipment, where the special-timeslot configuration information is used to configure the user equipment to send the uplink physical signal over a downlink frequency band in the special timeslot; and performing channel estimation according to the uplink physical signal after receiving the uplink physical signal sent by the user equipment, to obtain channel state information. Compared with a technical solution in the prior art in which user equipment obtains channel state information and then feeds back the channel state information to a base station, system overheads caused in obtaining, by the base station, the channel state information are reduced.

Claims8

Dependent claims

A base station, comprising:

a processor, configured to determine, according to downlink radio resource usage, a special timeslot in a frequency range for downlink data transmission, wherein a downlink frequency resource in the special timeslot is usable by user equipment to transmit an uplink physical signal;
a transmitter, configured to send special-timeslot configuration information to the user equipment, the special-timeslot configuration information includes information indicating to the user equipment to send the uplink physical signal over the downlink frequency resource in the special timeslot;
and
a receiver, configured to:
receive, over the downlink frequency resource in the special timeslot, the uplink physical signal sent by the user equipment;
and, wherein
the processor is configured to obtain channel state information by performing channel estimation according to the uplink physical signal;
and
the special-timeslot configuration information comprises
coding frequency resource indication information, the frequency resource indication information being configured to instruct the user equipment to send the uplink physical signal to the base station on the downlink frequency resource in the special timeslot;
and,
user cluster indication information and second sub-frequency resource indication information, wherein the user cluster indication information indicates a user cluster, the user cluster comprises multiple user equipment, and the second sub-frequency resource indication information indicates a second sub-frequency resource used when each of the user equipment in the user cluster sends the uplink physical signal in the special timeslot.

9 more elements

User equipment, comprising:

a receiver, configured to receive special-timeslot configuration information sent by a base station for instructing the user equipment to send an uplink physical signal over a downlink frequency resource in a special timeslot, the special timeslot is determined, by the base station according to downlink radio resource usage, in a frequency range usable by the user equipment for downlink data transmission, and the downlink frequency resource in the special timeslot is configured to transmit the uplink physical signal;
and
a transmitter, configured to send the uplink physical signal to the base station over the downlink frequency resource in the special timeslot, to enable the base station to obtain channel state information by performing channel estimation according to the uplink physical signal;
and, wherein the special-timeslot configuration information comprises:
coding frequency resource indication information, the frequency resource indication information being configured to instruct the user equipment to send the uplink physical signal to the base station on the downlink frequency resource in the special timeslot;
and,
user cluster indication information and second sub-frequency resource indication information, wherein the user cluster indication information indicates a user cluster, the user cluster comprises multiple user equipment, and the second sub-frequency resource indication information indicates a second sub-frequency resource used when each of the user equipment in the user cluster sends the uplink physical signal in the special timeslot.

4 more elements

A channel state information obtaining method, comprising:

determining, by a base station, according to downlink radio resource usage, a special timeslot in a frequency range for downlink data transmission, wherein a downlink frequency resource in the special timeslot is usable by user equipment to transmit an uplink physical signal;
sending, by the base station, special-timeslot configuration information to the user equipment, the special-timeslot configuration information includes information indicating to the user equipment to send the uplink physical signal over the downlink frequency resource in the special timeslot;
receiving, by the base station over the downlink frequency resource in the special timeslot, the uplink physical signal sent by the user equipment;
and
obtaining, by the base station, channel state information by performing channel estimation according to the uplink physical signal;
and,
wherein the special-timeslot configuration information comprises:
coding frequency resource indication information, the frequency resource indication information being configured to instruct the user equipment to send the uplink physical signal to the base station on the downlink frequency resource in the special timeslot;
and
user cluster indication information and second sub-frequency resource indication information, the user cluster indication information indicates a user cluster, the user cluster comprises multiple user equipment, and the second sub-frequency resource indication information indicates a second sub-frequency resource used when each of the user equipment in the user cluster sends the uplink physical signal in the special timeslot.

7 more elements

A channel state information obtaining method, comprising:

receiving, by user equipment, special-timeslot configuration information sent by a base station for instructing the user equipment to send an uplink physical signal over a downlink frequency resource in the special timeslot, the special timeslot is determined, by the base station according to downlink radio resource usage, in a frequency range usable by the user equipment for downlink data transmission, and the downlink frequency resource in the special timeslot is configured to transmit the uplink physical signal;
and
sending, by the user equipment, the uplink physical signal to the base station over the downlink frequency resource in the special timeslot, to enable the base station to obtain channel state information by performing channel estimation according to the uplink physical signal;
and,
wherein the special-timeslot configuration information comprises;
coding frequency resource indication information, and the frequency resource indication information is used to instruct the user equipment to send the uplink physical signal to the base station on the downlink frequency resource in the special timeslot;
and
user cluster indication information and second sub-frequency resource indication information, wherein the user cluster indication information indicates a user cluster, the user cluster comprises multiple user equipment, and the second sub-frequency resource indication information indicates a second sub-frequency resource used when each of the user equipment in the user cluster sends the uplink physical signal in the special timeslot.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/423,185Filed 28 May 2019 · continuation
Priority: 25 Mar 2014
Published: US 2019/0280754 A112 Sep 2019
Granted: 6 Jul 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04B 7/0626
Feedback content: channel coefficients, e.g. channel state information [CSI]
H04L 5/14
Arrangements affording multiple use of the transmission path: two-way operation using the same type of signal, i.e. duplex
H04W 72/0446
Based on the type of the allocated resource: resources in time domain, e.g. slots or frames
H04W 72/0453
Based on the type of the allocated resource: resources in frequency domain, e.g. a carrier in FDMA

Family

PCT/CN2014/074043Parent of this continuation · filed 25 Mar 2014
Application15/274,170Parent of this continuation · filed 23 Sep 2016
US 2019/0280754 A1Pre-grant publication · published 12 Sep 2019
US 10,340,998 B2Parent of this continuation
US 2017/0012690 A1Published application
US 11,057,094 B2This patent

From the US filing history. Foreign family members aren’t listed.