Measurement report triggering techniques for multiple component carriers

Patent metadata

Field	Value
Publication number	US-11489638-B2
Application number	US-201916701283-A
Country	US
Kind code	B2
Filing date	Dec 3, 2019
Priority date	Dec 5, 2018
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

Methods, systems, and devices for wireless communications are described that identify a minimum gap between a control channel transmission on a first component carrier (CC) that triggers a measurement report and an associated reference signal transmission on a second CC. The minimum gap may be based on a resource associated with a control channel transmission and a resource associated with the reference signal transmission. The first CC and the second CC have different numerologies and the minimum gap may be identified in terms of a number of OFDM symbols of the second CC that carries the reference signal transmission. The minimum gap also may be identified based on a location of the control channel transmission within a slot of the first CC. In cases where beam switching is used, the minimum gap may be further based at least in part on a beam switch time for performing the beam switching.

First claim

What is claimed is:

1. A method for wireless communication at a user equipment (UE), comprising:
establishing a connection with a base station via at least a first component carrier (CC) and a second CC, wherein the first CC has a different numerology than the second CC;
receiving a downlink control channel transmission via the first CC;
receiving, responsive to the downlink control channel transmission triggering a reference signal transmission, one or more channel state information reference signals of the reference signal transmission on the second CC based at least in part on a minimum gap between a resource associated with the downlink control channel transmission on the first CC and a resource associated with the reference signal transmission on the second CC, wherein the minimum gap is based at least in part on a numerology of the first CC being greater than or less than a numerology of the second CC; and
measuring one or more channel characteristics of the reference signal transmission.

2. The method of claim 1 , wherein the resource associated with the downlink control channel transmission comprises an orthogonal frequency division multiplexing (OFDM) symbol of the downlink control channel transmission on the first CC, the resource associated with the reference signal transmission comprises an OFDM symbol of the reference signal transmission on the second CC, and the minimum gap is measured in OFDM symbols of the numerology of the first CC.

3. The method of claim 1 , wherein the resource associated with the downlink control channel transmission comprises a first slot containing the downlink control channel transmission on the first CC, the resource associated with the reference signal transmission comprises a second slot containing the reference signal transmission on the second CC, and the minimum gap is measured as a number of slots of the second CC, wherein the minimum gap is identified based at least in part on a location of the downlink control channel transmission within the first slot.

4. The method of claim 1 , further comprising:
transmitting an indication of the minimum gap to the base station.

5. The method of claim 4 , wherein the indication of the minimum gap is provided for a plurality of different numerology combinations of the first CC and the second CC.

6. The method of claim 1 , wherein the minimum gap is measured with respect to a first or last orthogonal frequency division multiplexing (OFDM) symbol of the downlink control channel transmission relative to a first or last OFDM symbol of the reference signal transmission.

7. The method of claim 1 , wherein the minimum gap is based at least in part on a difference between the numerology of the first CC and the numerology of the second CC.

8. The method of claim 7 , wherein a same minimum gap is provided for each of a plurality of different numerology combinations.

9. The method of claim 1 , wherein the minimum gap is further based at least in part on a beam switching gap of the UE.

10. The method of claim 9 , wherein the minimum gap is determined as a sum of a minimum offset between the downlink control channel transmission and the reference signal transmission and the beam switching gap, or based on a maximum value of the minimum offset or the beam switching gap.

11. The method of claim 10 , wherein the minimum offset is prespecified for each of a plurality of different numerology combinations.

12. The method of claim 11 , wherein a same minimum offset is provided for each of the plurality of different numerology combinations.

13. The method of claim 1 , wherein the minimum gap is identified when the second CC has a shorter resource duration than the first CC.

14. The method of claim 1 , wherein the minimum gap is determined based at least in part on a duration of the downlink control channel transmission and a scaling factor, wherein the scaling factor is proportional to a difference in the numerology of the first CC and the numerology of the second CC.

15. The method of claim 1 , wherein the minimum gap is provided for each frequency band combination configured for the connection with the base station, for each frequency band pair combination configured for the connection with the base station, or any combinations thereof.

16. The method of claim 1 , wherein the UE transmits minimum gap information to the base station that indicates minimum gaps for two or more frequency band combinations configured for the connection with the base station, two or more frequency band pair combinations configured for the connection with the base station, one or more frequency band pair combination that is unsupported by the UE, or any combinations thereof.

17. The method of claim 1 , wherein the minimum gap comprises a first quantity of symbols based at least in part on the numerology of the first CC being greater than the numerology of the second CC or a second quantity of symbols different than the first quantity of symbols based at least in part on the numerology of the first CC being less than the numerology of the second CC.

18. A method for wireless communication at a base station, comprising:
establishing a connection with a user equipment (UE) via at least a first component carrier (CC) and a second CC, wherein the first CC has a different numerology than the second CC;
identifying a minimum gap between a resource associated with a downlink control channel transmission on the first CC and a resource associated with a reference signal transmission on the second CC, wherein the minimum gap is based at least in part on a numerology of the first CC being greater than or less than a numerology of the second CC;
transmitting the downlink control channel transmission to the UE via the first CC; and
transmitting, responsive to the downlink control channel transmission triggering a reference signal transmission, one or more channel state information reference signals of the reference signal transmission to the UE on the second CC based at least in part on the minimum gap.

19. The method of claim 18 , wherein the resource associated with the downlink control channel transmission comprises an orthogonal frequency division multiplexing (OFDM) symbol of the downlink control channel transmission on the first CC, the resource associated with the reference signal transmission comprises an OFDM symbol of the reference signal transmission on the second CC, and the minimum gap is measured in OFDM symbols of the numerology of the first CC.

20. The method of claim 18 , wherein the resource associated with the downlink control channel transmission comprises a first slot containing the downlink control channel transmission on the first CC, the resource associated with the reference signal transmission comprises a second slot containing the reference signal transmission on the second CC, and the minimum gap is measured as a number of slots of the second CC, wherein the minimum gap is identified based at least in part on a location of the downlink control channel transmission within the first slot.

21. The method of claim 18 , further comprising:
receiving, from the UE, an indication of the minimum gap.

22. The method of claim 21 , wherein the indication of the minimum gap is provided for a plurality of different numerology combinations of the first CC and the second CC.

23. The method of claim 18 , wherein the minimum gap is measured with respect to a first or last orthogonal frequency division multiplexing (OFDM)

Assignees

• Qualcomm Inc

Inventors

• Manolakos Alexandros
• Cheraghi Parisa
• Sankar Hari
• Soriaga Joseph Binamira
• Luo Tao
• Ji Tingfang
• Gaal Peter
• Gorokhov Alexei Yurievitch

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L1/1642

  Formats specially adapted for sequence numbers · CPC title

• H04L5/001 Primary

  the frequencies being arranged in component carriers · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0064

  Rate requirement of the data, e.g. scalable bandwidth, data priority · CPC title