Method and device for beam failure recovery of network cooperative communication in wireless communication system

1 . A method by a terminal in a wireless communication system, the method comprising:

obtaining information about at least one reference signal for beam failure detection;

determining whether a beam failure is detected with respect to the at least one reference signal, the at least one reference signal including a first reference signal set, a second reference signal set and a third reference signal set; and

in a case that the beam failure is detected with respect to at least one of the first reference signal set, the second reference signal set, and the third reference signal set, transmitting beam failure recovery request information including information indicating at least one of the first reference signal set, the second reference signal set, and the third reference signal set with respect to which the beam failure is detected,

wherein the first reference signal set corresponds to a first control resource set (CORESET) pool, the second reference signal set corresponds to a second CORESET pool, and the third reference signal set corresponds to a cell associated with the first CORESET pool and the second CORESET pool.

2 . The method of claim 1 , wherein in a case that the beam failure is detected with respect to the first reference signal set, the beam failure recovery request information is transmitted using a first physical uplink control channel (PUCCH) resource set associated with the first CORESET pool, and in a case that the beam failure is detected with respect to the second reference signal set, the beam failure recovery request information is transmitted using a second PUCCH resource set associated with the second CORESET pool.

3 . The method of claim 1 , wherein in a case that the beam failure is detected with respect to the first reference signal set, the beam failure recovery request information is transmitted using a third physical uplink control channel (PUCCH) resource set associated with the second CORESET pool, and in a case that the beam failure is detected with respect to the second reference signal set, the beam failure recovery request information is transmitted using a fourth PUCCH resource set associated with the first CORESET pool.

4 . The method of claim 1 , further comprising:

as a response to the transmission of the beam failure recovery request information, receiving an uplink grant; and

transmitting, as a response to the uplink grant, a control message including information related to the detected beam failure,

wherein the beam failure recovery request information is transmitted using a physical random access channel (PRACH) resource associated with the cell in a case that the beam failure is detected with respect to the third reference signal set.

5 . The method of claim 1 ,

wherein detection of the beam failure indicated by the first reference signal set is for a partial beam failure at a first transmission reception point;

wherein detection of the beam failure indicated by the second reference signal set is for a partial beam failure at a second transmission reception point; and

wherein detection of the beam failure indicated by the third reference signal set is for a full beam failure at the cell associated with the first CORESET pool and the second CORESET pool.

6 . A method by a base station in a wireless communication system, the method comprising:

transmitting information about at least one reference signal for beam failure detection to a terminal; and

in a case that a beam failure is detected with respect to at least one of a first reference signal set, a second reference signal set, and a third reference signal set included in the at least one reference signal, receiving, from the terminal, beam failure recovery request information including information indicating at least one of the first reference signal set, the second reference signal set, and the third reference signal set with respect to which the beam failure is detected,

wherein the first reference signal set corresponds to a first control resource set (CORESET) pool, the second reference signal set corresponds to a second CORESET pool, and the third reference signal set corresponds to a cell associated with the first CORESET pool and the second CORESET pool.

7 . The method of claim 6 , further comprising:

in response to the reception of the beam failure recovery request information, transmitting an uplink grant to the terminal; and

receiving, as a response to the uplink grant, a control message including information related to the detected beam failure from the terminal,

wherein the beam failure recovery request information is received using a physical random access channel (PRACH) resource associated with the cell in a case that the beam failure is detected with respect to the third reference signal set.

8 . The method of claim 6 , wherein in a case that the beam failure is detected with respect to the first reference signal set, the beam failure recovery request information is received using a first physical uplink control channel (PUCCH) resource set associated with the first CORESET pool, and in a case that the beam failure is detected with respect to the second reference signal set, the beam failure recovery request information is received using a second PUCCH resource set associated with the second CORESET pool, or

wherein in the case that the beam failure is detected with respect to the first reference signal set, the beam failure recovery request information is received using a third physical uplink control channel (PUCCH) resource set associated with the second CORESET pool, and in the case that the beam failure is detected with respect to the second reference signal set, the beam failure recovery request information is received using a fourth PUCCH resource set associated with the first CORESET pool.

9 . The method of claim 6 ,

wherein detection of the beam failure indicated by the first reference signal set is for a partial beam failure at a first transmission reception point;

wherein detection of the beam failure indicated by the second reference signal set is for a partial beam failure at a second transmission reception point; and

wherein detection of the beam failure indicated by the third reference signal set is for a full beam failure at the cell associated with the first CORESET pool and the second CORESET pool.

10 . A terminal in a wireless communication system, the terminal comprising:

a transceiver; and

at least one processor comprising processing circuitry configured individually and/or collectively, to;

obtain information about at least one reference signal for beam failure detection,

determine whether a beam failure is detected with respect to the at least one reference signal, the at least one reference signal including a first reference signal set, a second reference signal set and a third reference signal set; and

in a case that the beam failure is detected with respect to at least one of the first reference signal set, the second reference signal set, and the third reference signal set, transmit, using the transceiver, beam failure recovery request information including information indicating at least one of the first reference signal set, the second reference signal set, and the third reference signal set with respect to which the beam failure is detected,

wherein the first reference signal set corresponds to a first control resource set (CORESET) pool, the second reference signal set corresponds to a second CORESET pool, and the third reference signal set corresponds to a cell associated with the first CORESET pool and the second CORESET pool.

11 . The terminal of claim 10 , wherein the at least one processor is configured, individually and/or collectively, to control the transceiver to receive an uplink grant as a response to the transmission of the beam failure recovery request information, and control the transceiver to transmit, based on the uplink grant, a control message including information related to the detected beam failure,

wherein the beam failure recovery request information is transmitted using a physical random access channel (PRACH) resource associated with the cell in a case that the beam failure is detected with respect to the third reference signal set.

12 . The terminal of claim 10 , wherein in a case that the beam failure is detected with respect to the first reference signal set, the beam failure recovery request information is transmitted using a first physical uplink control channel (PUCCH) resource set associated with the first CORESET pool, and in a case that the beam failure is detected with respect to the second reference signal set, the beam failure recovery request information is transmitted using a second PUCCH resource set associated with the second CORESET pool.

13 . The terminal of claim 10 , wherein in a case that the beam failure is detected with respect to the first reference signal set, the beam failure recovery request information is transmitted using a third physical uplink control channel (PUCCH) resource set associated with the second CORESET pool, and in a case that the beam failure is detected with respect to the second reference signal set, the beam failure recovery request information is transmitted using a fourth PUCCH resource set associated with the first CORESET pool.

14 . The terminal of claim 10 ,

wherein detection of the beam failure indicated by the first reference signal set is for a partial beam failure at a first transmission reception point;

wherein detection of the beam failure indicated by the second reference signal set is for a partial beam failure at a second transmission reception point; and

wherein detection of the beam failure indicated by the third reference signal set is for a full beam failure at the cell associated with the first CORESET pool and the second CORESET pool.

15 . A base station in a wireless communication system, the base station comprising:

a transceiver; and

at least one processor comprising processing circuitry, the at least one processor being configured, individually and/or collectively, to:

control the transceiver to transmit information about at least one reference signal for beam failure detection to a terminal, and

control the transceiver to, in a case that a beam failure is detected with respect to the at least one reference signal, the at least one reference signal including at least one of a first reference signal set, a second reference signal set, and a third reference signal set, receive, from the terminal, beam failure recovery request information including information indicating at least one of the first reference signal set, the second reference signal set, and the third reference signal set with respect to which the beam failure is detected,

wherein the first reference signal set corresponds to a first control resource set (CORESET) pool, the second reference signal set corresponds to a second CORESET pool, and the third reference signal set corresponds to a cell associated with the first CORESET pool and the second CORESET pool.

16 . The base station of claim 15 , wherein in a case that the beam failure is detected with respect to the first reference signal set, the beam failure recovery request information is received using a first physical uplink control channel (PUCCH) resource set associated with the first CORESET pool, and in a case that the beam failure is detected with respect to the second reference signal set, the beam failure recovery request information is received using a second PUCCH resource set associated with the second CORESET pool.

17 . The base station of claim 15 , wherein in a case that the beam failure is detected with respect to the first reference signal set, the beam failure recovery request information is received using a third physical uplink control channel (PUCCH) resource set associated with the second CORESET pool, and in a case that the beam failure is detected with respect to the second reference signal set, the beam failure recovery request information is received using a fourth PUCCH resource set associated with the first CORESET pool.

18 . The base station of claim 15 , wherein the at least one processor is configured, individually and/or collectively, to transmit, using the transceiver, an uplink grant to the terminal as a response to the reception of the beam failure recovery request information, and control the transceiver to receive, as a response to the uplink grant, a control message including information related to the detected beam failure from the terminal,

wherein the beam failure recovery request information is received using a physical random access channel (PRACH) resource associated with the cell in a case that beam failure is detected with respect to the third reference signal set.

19 . The base station of claim 15 ,

wherein detection of the beam failure indicated by the first reference signal set is for a partial beam failure at a first transmission reception point;

wherein detection of the beam failure indicated by the second reference signal set is for a partial beam failure at a second transmission reception point; and

wherein detection of the beam failure indicated by the third reference signal set is for a full beam failure at the cell associated with the first CORESET pool and the second CORESET pool.