Carrier aggregation under different subframe structures in new radio

Patent metadata

Field	Value
Publication number	US-2018368114-A1
Application number	US-201816003753-A
Country	US
Kind code	A1
Filing date	Jun 8, 2018
Priority date	Jun 16, 2017
Publication date	Dec 20, 2018
Grant date	—

Abstract

A method and apparatus for downlink and uplink control management of component carriers during carrier aggregation in a new radio wireless communication system is disclosed. For example, the method and apparatus include receiving, at a user equipment (UE), a slot format indicator in at least one slot of at least one component carrier of a plurality of component carriers from a network entity, where the at least one component carrier includes a group common Physical Downlink Control Channel (PDCCH), the slot format indicator within the group common PDCCH indicating at least slot structure information for one or more other component carriers from the plurality of component carriers; and communicating, with the network entity, using the at least slot structure information for the one more other component carriers.

First claim

What is claimed is:

1 . A method of wireless communication, comprising:
receiving, at a user equipment (UE), a slot format indicator in at least one slot of at least one component carrier of a plurality of component carriers from a network entity, where the at least one component carrier includes a group common Physical Downlink Control Channel (PDCCH), the slot format indicator within the group common PDCCH indicating at least slot structure information for one or more other component carriers from the plurality of component carriers; and communicating, with the network entity, using the at least slot structure information for the one more other component carriers.

2 . The method of claim 1 , wherein a slot duration corresponding to the at least one component carrier is shorter than a slot duration corresponding to the one or more other component carriers.

3 . The method of claim 1 , wherein a slot duration corresponding to the at least one component carrier is longer than a slot duration corresponding to the one or more other component carriers.

4 . The method of claim 1 , further compromising receiving a second PDCCH on a second component carrier from the plurality of component carriers, where the PDCCH conveys a slot format indicator for at least one slot of the second component carrier.

5 . The method of claim 1 , wherein the slot format indicator further indicates a slot structure information for the at least one component carrier carrying the slot format indicator.

6 . The method of claim 1 , further comprising receiving, at the UE, a second slot format indicator in at least a second slot of the at least one component carrier, the second slot format indicator indicating a slot structure information for the at least one component carrier.

7 . The method of claim 1 , wherein the slot format indicator further indicates a respective slot structure for multiple slots of the one or more other component carriers and the at least one component carrier.

8 . The method of claim 1 , wherein the at least one component carrier and the one or more other component carriers have different numerologies.

9 . The method of claim 1 , further comprising:
receiving, at the UE, an indication to trigger Channel State Information (CSI) measurements for the one or more other component carriers, the indication included within Downlink Control Information (DCI) received in a slot of the at least one component carrier; determining a measurement configuration for performing the CSI measurements in the one or more other component carriers; performing the CSI measurements in the one or more other component carriers based on the measurement configuration; transmitting, to the network entity, the CSI measurements for the one or more other component carriers.

10 . The method of claim 9 , wherein determining the measurement configuration for performing the CSI measurements for the one or more other component carriers further comprises determining whether measurements slots for each of the one or more other component carriers are located at or after the slot of the at least one component carrier; and
wherein performing the CSI measurements for the one or more other component carriers based on the measurement configuration further comprises performing the CSI measurements in the one or more other component carriers based on a determination that the measurements slots for each of the one or more other component carriers are located at or after the slot of the at least one component carrier.

11 . The method of claim 9 , further comprising omitting performing the CSI measurements for at least one of the one or more other component carriers with measurement slots located before the slot of the at least one component carrier.

12 . The method of claim 1 , further comprising:
generating, at the UE, Uplink Control Information (UCI) in the at least one component carrier, the UCI including uplink information for the one or more other component carriers; and transmitting, to a network entity, the UCI in at least one slot of the at least one component carrier.

13 . The method of claim 12 , wherein the UCI corresponds to at least one of an acknowledgement signal, a negative acknowledgement signal, a scheduling request, a Channel Quality Indicator (CQI), or a Channel State Information (CSI).

14 . The method of claim 1 , wherein transmitting the UCI further comprises transmitting the UCI in a Physical Uplink Control Channel (PUCCH), where the UCI can be repeated or be transmitted in a subset of slots.

15 . The method of claim 1 , further comprising:
determining, at the UE, a timing advance offset associated with each of the plurality of component carriers.

16 . The method of claim 15 , wherein the determination for a component carrier is based on a numerology of the component carrier.

17 . The method of claim 15 , wherein the plurality of component carriers are configured with different numerologies; and further comprising:
utilizing one of a primary cell or a primary secondary cell as a reference to determine the timing advance offset for another component carrier.

18 . An apparatus, comprising:
a memory; and a processor in communication with the memory, wherein the processor is configured to:
receive, at a user equipment (UE), a slot format indicator in at least one slot of at least one component carrier of a plurality of component carriers from a network entity, where the at least one component carrier includes a group common Physical Downlink Control Channel (PDCCH), the slot format indicator within the group common PDCCH indicating at least slot structure information for one or more other component carriers from the plurality of component carriers; and
communicate, with the network entity, using the at least slot structure information for the one more other component carriers.

19 . A computer-readable medium storing computer code executable by a processor for wireless communications, comprising:
code for receiving, at a user equipment (UE), a slot format indicator in at least one slot of at least one component carrier of a plurality of component carriers from a network entity, where the at least one component carrier includes a group common Physical Downlink Control Channel (PDCCH), the slot format indicator within the group common PDCCH indicating at least slot structure information for one or more other component carriers from the plurality of component carriers; and code for communicating, with the network entity, using the at least slot structure information for the one more other component carriers.

20 . An apparatus for wireless communication, comprising:
means for receiving, at a user equipment (UE), a slot format indicator in at least one slot of at least one component carrier of a plurality of component carriers from a network entity, where the at least one component carrier includes a group common Physical Downlink Control Channel (PDCCH), the slot format indicator within the group common PDCCH indicating at least slot structure information for one or more other component carriers from the plurality of component carriers; and means for communicating, with the network entity, using the at least slot structure information for the one more other component carriers.

21 . A method of wireless communication, comprising:
generating, at a network entity, a slot format indicator for at least one component carrier of a plurality of component carriers, where the at least one com

Assignees

• Qualcomm Inc

Inventors

• Chen Wanshi
• Lee Heechoon
• Ji Tingfang
• Gaal Peter

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/23 Primary

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

• H04L5/0053

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

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title