Beam management schemes

Patent metadata

Field	Value
Publication number	US-10986644-B2
Application number	US-201816151181-A
Country	US
Kind code	B2
Filing date	Oct 3, 2018
Priority date	Oct 12, 2017
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

Aspects of the present disclosure provide for beam management in wireless communication systems. In some examples, beam angle information (e.g., angles of arrival/departure) may be utilized to select one or more serving downlink beams for communication between a scheduling entity and a scheduled entity. The beam angle information may further be utilized to facilitate additional operations within a backhaul network, such as wireless node locating, obstacle locating, system mapping within the network topology, beam determination and beam sweeping configuration, and mobility management among wireless nodes of a backhaul network. In other examples, aperiodic uplink beam measurements may be triggered based on downlink beam measurement reports and/or in response to a request from a scheduled entity. The scheduling entity may then jointly select uplink and downlink beams based on both the received downlink beam measurement report and uplink beam measurements.

First claim

What is claimed is:

1. A method of wireless communication at a scheduled entity, comprising:
receiving a plurality of first reference beams from a first wireless node in a first beam-sweeping configuration, each of the plurality of first reference beams comprising a respective first downlink reference signal;
measuring first beam quality information and first beam angle information for the plurality of first reference beams;
transmitting a first beam measurement report comprising the first beam quality information, the first beam angle information associated with at least a subset of the plurality of first reference beams, and a request for uplink resources for an aperiodic uplink beam reference signal;
receiving downlink control information from the first wireless node indicating uplink resources reserved for the aperiodic uplink beam reference signal in response to the first beam measurement report;
transmitting the aperiodic uplink beam reference signal to the first wireless node on the uplink resources;
communicating with the first wireless node utilizing at least one serving downlink beam within the subset of the plurality of first reference beams, wherein the at least one serving downlink beam is selected based on the first beam measurement report and the aperiodic uplink beam reference signal.

2. The method of claim 1 , wherein the first beam angle information of a reference beam of the plurality of first reference beams comprises at least one of an angle of arrival, an angle of departure, a difference in the angle of arrival between the reference beam and an additional reference beam, a difference in the angle of departure between the reference beam and the additional reference beam, or temporal information related to the reference beam.

3. The method of claim 2 , wherein the temporal information related to the reference beam comprises at least one of a time of arrival of the reference beam, a time of departure of the reference beam, a time difference of arrival between the reference beam and the additional reference beam, or a time difference of departure between the reference beam and the additional reference beam.

4. The method of claim 1 , wherein transmitting the first beam measurement report further comprises:
transmitting the first beam measurement report to a scheduling entity for selection of the at least one serving downlink beam.

5. The method of claim 4 , wherein transmitting the first beam measurement report further comprises:
transmitting the first beam measurement report to the scheduling entity via a relay wireless node in wireless communication with the scheduled entity and the scheduling entity within an integrated access backhaul network.

6. The method of claim 5 , wherein the first wireless node comprises the relay wireless node.

7. The method of claim 1 , further comprising:
receiving a plurality of second reference beams from a second wireless node in a second beam-sweeping configuration, each of the plurality of second reference beams comprising a respective second downlink reference signal;
measuring second beam quality information and second beam angle information for the plurality of second reference beams;
transmitting a second beam measurement report comprising the second beam quality information and the second beam angle information associated with at least a subset of the plurality of second reference beams; and
communicating with the second wireless node utilizing at least one additional serving downlink beam selected from the plurality of second reference beams based on the second beam measurement report.

8. The method of claim 7 , wherein transmitting the first beam measurement report and transmitting the second beam measurement report further comprise:
transmitting the second beam measurement report together with the first beam measurement report to a scheduling entity in wireless communication with the first wireless node and the second wireless node.

9. The method of claim 8 , wherein transmitting the second beam measurement report together with the first beam measurement report further comprises:
transmitting a combined beam measurement report comprising at least a portion of each of the first beam quality information, the second beam quality information, the first beam angle information, and the second beam angle information.

10. The method of claim 1 , wherein communicating with the scheduling entity utilizing the at least one serving downlink beam selected from the plurality of reference beams based on the beam measurement report further comprises:
communicating with the scheduling entity utilizing at least two serving downlink beams within the subset of the plurality of reference beams, wherein the at least two serving downlink beams are selected based on a difference between the respective angles of arrival or the respective angles of departure between the at least two serving downlink beams.

11. A scheduled entity for wireless communication, comprising:
a processor;
a transceiver communicatively coupled to the processor; and
a memory communicatively coupled to the processor, wherein the processor is configured to:
receive a plurality of first reference beams from a first wireless node in a first beam-sweeping configuration via the transceiver, each of the plurality of first reference beams comprising a respective first downlink reference signal;
measure first beam quality information and first beam angle information for the plurality of first reference beams;
transmit a first beam measurement report comprising the first beam quality information, the first beam angle information associated with at least a subset of the plurality of first reference beams, and a request for uplink resources for an aperiodic uplink beam reference signal via the transceiver;
receive downlink control information from the first wireless node indicating uplink resources reserved for the aperiodic uplink beam reference signal in response to the first beam measurement report;
transmit the aperiodic uplink beam reference signal to the first wireless node on the uplink resources; and
communicate with the first wireless node via the transceiver utilizing at least one serving downlink beam within the subset of the plurality of first reference beams, wherein the at least one serving downlink beam is selected based on the first beam measurement report and the aperiodic uplink beam reference signal.

12. The scheduled entity of claim 11 , wherein the first beam angle information of a reference beam of the plurality of first reference beams comprises at least one of an angle of arrival, an angle of departure, a difference in the angle of arrival between the reference beam and an additional reference beam, a difference in the angle of departure between the reference beam and the additional reference beam, or temporal information related to the reference beam.

13. The scheduled entity of claim 12 , wherein the temporal information related to the reference beam comprises at least one of a time of arrival of the reference beam, a time of departure of the reference beam, a time difference of arrival between the reference beam and the additional reference beam, or a time difference of departure between the reference beam and the additional reference beam.

14. The scheduled entity of claim 11 , wherein the processor is further configured to:
transmit the first beam measurement report to a scheduling entity for selection of the at least one serving downlink beam.

15. The scheduled entity of claim 14 , wherein the processor is further configured to:
transmit the first beam measurem

Assignees

• Qualcomm Inc

Inventors

• Luo Jianghong
• Abedini Navid
• Li Junyi
• Subramanian Sundar
• Cezanne Juergen
• Islam Muhammad Nazmul

Classifications

• H04W72/542 Primary

  using measured or perceived quality · CPC title

• H04B7/06952

  Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping · CPC title

• H04B7/024 Primary

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title

• H04B7/088

  using beam selection · CPC title

• H04W72/046

  the resource being in the space domain, e.g. beams · CPC title