Back to results
US 12,593,368 B2Granted
Method and apparatus for generating MAC CE for beam failure recovery in wireless communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsAnil Agiwal, Seungri Jin, Jaehyuk Jang
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure proposes a method and an apparatus of generating medium access control (MAC) control element (CE) for beam failure recovery.
Claims20
A method performed by a terminal in a communication system, the method comprising:
- receiving configuration information for a serving cell, the configuration information configuring a first beam failure detection (BFD)-reference signal (RS) set and a second BFD-RS set;
- identifying whether a first beam failure recovery (BFR) for the first BFD-RS set of the serving cell is triggered;
- identifying whether a second BFR for the second BFD-RS set of the serving cell is triggered;
- in case that at least one of the first BFR and the second BFR is triggered and not cancelled for the serving cell for which an evaluation of candidate beams has been completed, identifying a BFR medium access control (MAC) control element (CE);
- and
- transmitting the BFR MAC CE,
- wherein the BFR MAC CE comprises:
- a first bitmap in which each bit respectively indicates whether a beam failure is detected for at least one BFD-RS set of each serving cell, and
- a second bitmap indicating whether the beam failure is detected for two BFD-RS sets of one or more serving cells for which the two BFD-RS sets are configured and an evaluation of candidate beams has been completed for the two BFD-RS sets of the one or more serving cells,
- wherein the second bitmap comprises one or more fields corresponding to the one or more serving cells for which the two BFD-RS sets are configured and the beam failure is detected for at least one of the two BFD-RS sets,
- wherein the one or more serving cells are indexed sequentially starting with a special cell (SpCell) and followed by one or more secondary cells (SCells) in an ascending order of serving cell indexes, and
- wherein a number of octets of the second bitmap is determined based on a number of the one or more serving cells.
9 more elements
A method performed by a base station in a communication system, the method comprising:
- transmitting, to a terminal, configuration information of a serving cell, the configuration information comprising a first beam failure detection (BFD)-reference signal (RS) set and a second BFD-RS set;
- and
- receiving, from the terminal that identifies that at least one of a first beam failure recovery (BFR) for the first BFD-RS set and a second BFR for the second BFD-RS set is triggered and not cancelled for the serving cell for which an evaluation of candidate beams has been completed, a BFR medium access control (MAC) control element (CE),
- wherein the BFR MAC CE comprises:
- a first bitmap in which each bit respectively indicates whether a beam failure is detected for at least one BFD-RS set of each serving cell, and
- a second bitmap indicating whether the beam failure is detected for two BFD-RS sets of one or more serving cells for which the two BFD-RS sets are configured and an evaluation of candidate beams has been completed for the two BFD-RS sets of the one or more serving cells,
- wherein the second bitmap comprises one or more fields corresponding to the one or more serving cells for which the two BFD-RS sets are configured and the beam failure is detected for at least one of the two BFD-RS sets,
- wherein the one or more serving cells are indexed sequentially starting with a special cell (SpCell) and followed by one or more secondary cells (SCells) in an ascending order of serving cell indexes, and
- wherein a number of octets of the second bitmap is determined based on a number of the one or more serving cells.
6 more elements
A terminal in a communication system, the terminal comprising:
- a transceiver;
- and
- a controller coupled with the transceiver and configured to:
- receive configuration information for a serving cell, the configuration information configuring a first beam failure detection (BFD)-reference signal (RS) set and a second BFD-RS set,
- identify whether a first beam failure recovery (BFR) for the first BFD-RS set of the serving cell is triggered,
- identify whether a second BFR for the second BFD-RS set of the serving cell is triggered,
- in case that at least one of the first BFR and the second BFR is triggered and not cancelled for the serving cell for which an evaluation of candidate beams has been completed, identify a BFR medium access control (MAC) control element (CE), and
- transmit the BFR MAC CE,
- wherein the BFR MAC CE comprises:
- a first bitmap in which each bit respectively indicates whether a beam failure is detected for at least one BFD-RS set of each serving cell, and
- a second bitmap indicating whether the beam failure is detected for two BFD-RS sets of one or more serving cells for which the two BFD-RS sets are configured and an evaluation of candidate beams has been completed for the two BFD-RS sets of the one or more serving cells,
- wherein the second bitmap comprises one or more fields corresponding to the one or more serving cells for which the two BFD-RS sets are configured and the beam failure is detected for at least one of the two BFD-RS sets,
- wherein the one or more serving cells are indexed sequentially starting with a special cell (SpCell) and followed by one or more secondary cells (SCells) in an ascending order of serving cell indexes, and
- wherein a number of octets of the second bitmap is determined based on a number of the one or more serving cells.
11 more elements
A base station in a communication system, the base station comprising:
- a transceiver;
- and
- a controller coupled with the transceiver and configured to:
- transmit, to a terminal, configuration information of a serving cell, the configuration information comprising a first beam failure detection (BFD)-reference signal (RS) set and a second BFD-RS set, and
- receive, from the terminal that identifies that at least one of a first beam failure recovery (BFR) for the first BFD-RS set and a second BFR for the second BFD-RS set is triggered and not cancelled for the serving cell for which an evaluation of candidate beams has been completed, a BFR medium access control (MAC) control element (CE),
- wherein the BFR MAC CE comprises:
- a first bitmap in which each bit respectively indicates whether a beam failure is detected for at least one BFD-RS set of each serving cell, and
- a second bitmap indicating whether the beam failure is detected for two BFD-RS sets of one or more serving cells for which the two BFD-RS sets are configured and an evaluation of candidate beams has been completed for the two BFD-RS sets of the one or more serving cells,
- wherein the second bitmap comprises one or more fields corresponding to the one or more serving cells for which the two BFD-RS sets are configured and the beam failure is detected for at least one of the two BFD-RS sets,
- wherein the one or more serving cells are indexed sequentially starting with a special cell (SpCell) and followed by one or more secondary cells (SCells) in an ascending order of serving cell indexes, and
- wherein a number of octets of the second bitmap is determined based on a number of the one or more serving cells.
8 more elements
Dependencies are inferred from the claim text.