Wireless device processes for a scheduling secondary cell of a primary cell

Patent metadata

Field	Value
Publication number	US-12095686-B2
Application number	US-202217691586-A
Country	US
Kind code	B2
Filing date	Mar 10, 2022
Priority date	Mar 10, 2021
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A wireless device may receive one or more configuration parameters indicating changing a scheduling secondary cell from a first secondary cell to a second secondary cell. A scheduling secondary cell may be for receiving scheduling information for a primary cell. The wireless device may activate the second secondary cell in response to: receiving the one or more configuration parameters, and the second secondary cell being deactivated prior to receiving the one or more configuration parameters.

First claim

What is claimed is:

1. A method comprising:
receiving, by a wireless device, a first radio resource control (RRC) message comprising one or more first configuration parameters:
indicating that a first secondary cell is a scheduling secondary cell for a primary cell; and
comprising a search space parameter of a first search space of the first secondary cell, wherein a first value of the search space parameter indicates that the first search space is configured for monitoring to receive scheduling information for the primary cell and a second value of the search space parameter indicates that the first search space is not configured for monitoring to receive scheduling information for the primary cell;

monitoring the first search space of the first secondary cell to receive scheduling information of the primary cell;
receiving a second RRC message comprising one or more second configuration parameters indicating changing the scheduling secondary cell;
activating a second secondary cell in a first timing that is:
after a reception timing of the second RRC message; and
based on an offset from a reference system frame number; and

wherein, the activating is without receiving an activation command and is in response to:
receiving the second RRC message;
the one or more second configuration parameters indicating changing the scheduling secondary cell from the first secondary cell to the second secondary cell; and
the second secondary cell being deactivated prior to receiving the second RRC message.

2. The method of claim 1 , wherein the second RRC message is an RRC reconfiguration message.

3. The method of claim 1 , further comprising starting a deactivation timer, associated with the second secondary cell, in response to receiving the second RRC message.

4. The method of claim 1 , wherein the second RRC message indicates changing one or more search spaces, for receiving the scheduling information of the primary cell, from one or more first search spaces of the first secondary cell to one or more second search spaces of the second secondary cell.

5. The method of claim 1 , wherein the offset is in a first number of symbols or in a first number of slots.

6. The method of claim 1 , further comprising receiving a third configuration parameter indicating the offset.

7. The method of claim 1 , wherein the activating the second secondary cell comprises at least one of:
sounding reference signal (SRS) transmission via the second secondary cell;
channel state information (CSI) reporting via the second secondary cell;
physical downlink control channel (PDCCH) monitoring on the second secondary cell;
PDCCH monitoring for the second secondary cell; and
physical uplink control channel (PUCCH) transmission via the second secondary cell.

8. The method of claim 1 , wherein the one or more second configuration parameters indicate an identifier of the second secondary cell as the scheduling secondary cell for the primary cell.

9. The method of claim 1 , wherein the one or more search spaces are wireless device specific search spaces.

10. The method of claim 1 , further comprising:
receiving, before the reception timing, first scheduling information for an uplink transmission or a downlink transmission of a first transport block via the primary cell based on monitoring one or more first search spaces of the first secondary cell; and
receiving, after the reception timing, second scheduling information for an uplink transmission or a downlink transmission of a second transport block via the primary cell based on monitoring one or more second search spaces of the second secondary cell.

11. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
receive a first radio resource control (RRC) message comprising one or more first configuration parameters:
indicating that a first secondary cell is a scheduling secondary cell for the primary cell; and
comprising a search space parameter of a first search space of the first secondary cell, wherein a first value of the search space parameter indicates that the first search space is configured for monitoring to receive scheduling information for the primary cell and a second value of the search space parameter indicates that the first search space is not configured for monitoring to receive scheduling information for the primary cell;

monitor the first search space of the first secondary cell to receive scheduling information of the primary cell;
receive a second RRC message comprising one or more second configuration parameters indicating changing the scheduling secondary cell;
activate a second secondary cell in a first timing that is:
after a reception timing of the second RRC message; and
based on an offset from a reference system frame number; and

wherein, the activating is without receiving an activation command and is in response to:
receiving the second RRC message;
the one or more second configuration parameters indicating changing the scheduling secondary cell from the first secondary cell to the second secondary cell; and
the second secondary cell being deactivated prior to receiving the second RRC message.

12. The wireless device of claim 11 , wherein the second RRC message is an RRC reconfiguration message.

13. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to start a deactivation timer, associated with the second secondary cell, in response to receiving the second RRC message.

14. The wireless device of claim 11 , wherein the second RRC message indicates changing one or more search spaces, for receiving the scheduling information of the primary cell, from one or more first search spaces of the first secondary cell to one or more second search spaces of the second secondary cell.

15. The wireless device of claim 11 , wherein the offset is in a first number of symbols or in a first number of slots.

16. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive a third configuration parameter indicating the offset.

17. The wireless device of claim 11 , wherein activating the second secondary cell comprises at least one of:
sounding reference signal (SRS) transmission via the second secondary cell;
channel state information (CSI) reporting via the second secondary cell;
physical downlink control channel (PDCCH) monitoring on the second secondary cell;
PDCCH monitoring for the second secondary cell; and
physical uplink control channel (PUCCH) transmission via the second first secondary cell.

18. The wireless device of claim 11 , wherein the one or more second configuration parameters indicate an identifier of the second secondary cell as the scheduling secondary cell for the primary cell.

19. The wireless device of claim 11 , wherein the one or more search spaces are wireless device specific search spaces.

20. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
receive, before the reception timing, first scheduling information for an uplink transmission or a downlink transmission of a first transport block via the primary cell based on monitoring one or more first search spaces of the first secondary cell; and
receive, after the reception timing, second sche

Assignees

• Babaei Alireza
• Panpsy Tech Llc

Inventors

• Babaei Alireza

Classifications

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04W72/23

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

• H04L5/0098

  Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands · CPC title

• H04L5/0032 Primary

  Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation · CPC title

• H04L5/0094 Primary

  Indication of how sub-channels of the path are allocated · CPC title