Method and apparatus for validating stored system information

A terminal in a communication system, the terminal comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• acquire a first system information block 1 (SIB1), and other system information based on the first SIB1,
• store at least part of the first SIB1 and the other system information, wherein the stored at least part of the first SIB1 comprises information on a public land mobile network (PLMN) identity and a value tag of the first SIB1,
• control the transceiver to receive a second SIB1 from a cell, and
• determine whether the stored at least part of the first SIB1 and the other system information are valid for the cell based on whether information on a PLMN identity and a value tag of the second SIB1 are identical to the stored information on the PLMN identity and the stored value tag.

A method by a terminal for performing a beam failure detection and recovery procedure, the method comprising:

• receiving, from a base station, first configuration information for beam failure recovery (BFR);
• if beam failure is detected, initiating a first random access (RA) procedure for BFR based on the first configuration information;
• and
• if second configuration information for BFR is received while the first RA procedure is ongoing, terminating the first RA procedure and initiating a second RA procedure for BFR based on the second configuration information.

A method by a base station for performing a beam failure recovery (BFR) procedure, the method comprising:

• transmitting, to a terminal, first configuration information for BFR;
• transmitting, to the terminal, second configuration information for BFR;
• and
• receiving, from the terminal, a BFR request,
• wherein if the second configuration is transmitted while the terminal performs a random access (RA) procedure for BFR based on the first configuration, the request is based on the second configuration.

A terminal in a communication system, the terminal comprising:

• a transceiver;
• and
• at least one processor controller coupled with the transceiver and configured to:
• control the transceiver to receive, from a base station, first configuration information for beam failure recovery (BFR),
• if beam failure is detected, initiate a first random access (RA) procedure for BFR based on the first configuration information, and
• if second configuration information for BFR is received while the first RA procedure is ongoing, terminate the first RA procedure and initiate a second RA procedure for BFR based on the second configuration information.

A base station in a communication system, the base station comprising:

• a transceiver;
• and
• at least one processor controller coupled with the transceiver and configured to:
• control the transceiver to transmit, to a terminal, first configuration information for beam failure recovery (BFR),
• control the transceiver to transmit, to the terminal, second configuration information for BFR, and
• control the transceiver to receive, from the terminal, a BFR request,
• wherein if the second configuration is transmitted while the terminal performs a random access (RA) procedure for BFR based on the first configuration, the request is based on the second configuration.