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US 11,695,465 B2Granted
High reliability transmission mode for 2-step secondary cell beam failure recovery procedure
AssigneeQUALCOMM Incorporated
InventorsYan Zhou, Kiran Venugopal, Tianyang Bai, Jung Ho Ryu, Tao Luo, Junyi Li
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Abstract
Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for performing beam failure recovery involving a secondary cell.
Claims26
A method for wireless communication by a user equipment (UE), comprising:
- performing beam failure detection (BFD) of a beam pair link (BPL) associated with a secondary cell (SCell) in carrier aggregation (CA);
- sending a beam failure recovery request (BFRQ) message to another cell, the BFRQ message including an indication of a candidate recovery beam for the SCell;
- receiving a message from the other cell;
- and
- sending a media access control (MAC) control element (CE) after receiving the message, wherein the MAC CE is sent using one or more mechanisms to enhance reliability, wherein the one or more mechanisms comprise:
- beam sweeping and sending the MAC CE multiple times with different transmit beams, or
- sending the MAC CE with repetition defined by a repetition pattern.
4 more elements
A method for wireless communication by a network entity, comprising:
- receiving a beam failure recovery request (BFRQ) message from a user equipment (UE), the BFRQ message indicating a beam failure detected in a secondary cell (SCell) and including an indication of a candidate recovery beam for the SCell;
- sending a message to the UE;
- and
- receiving a media access control (MAC) control element (CE) after sending the message, wherein the MAC CE is sent using one or more mechanisms to enhance reliability, wherein the one or more mechanisms comprise:
- beam sweeping and sending the MAC CE multiple times with different transmit beams, or
- sending the MAC CE with repetition defined by a repetition pattern.
3 more elements
An apparatus for wireless communication by a user equipment (UE), comprising:
- a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to cause the apparatus to:
- perform beam failure detection (BFD) of a beam pair link (BPL) associated with a secondary cell (SCell) in carrier aggregation (CA);
- send a beam failure recovery request (BFRQ) message to another cell, the BFRQ message including an indication of a candidate recovery beam for the SCell;
- receive a message from the other cell;
- and
- send a media access control (MAC) control element (CE) after receiving the message, wherein the MAC CE is sent using one or more mechanisms to enhance reliability, wherein the one or more mechanisms comprise:
- beam sweeping and sending the MAC CE multiple times with different transmit beams, or
- sending the MAC CE with repetition defined by a repetition pattern.
5 more elements
An apparatus for wireless communication by a network entity, comprising:
- a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to cause the apparatus to:
- receive a beam failure recovery request (BFRQ) message from a user equipment (UE), the BFRQ message indicating a beam failure detected in a secondary cell (SCell) and including an indication of a candidate recovery beam for the SCell;
- send a message to the UE;
- and
- receive a media access control (MAC) control element (CE) after sending the message, wherein the MAC CE is sent using one or more mechanisms to enhance reliability, wherein the one or more mechanisms comprise:
- beam sweeping and sending the MAC CE multiple times with different transmit beams, or
- sending the MAC CE with repetition defined by a repetition pattern.
4 more elements
Dependencies are inferred from the claim text.