Random access method and apparatus in wireless communication system
Disclosed are a method and apparatus for performing random access in a wireless communication system. A method by which a terminal performs a random access procedure in a wireless communication system, according to an embodiment of the present disclosure, comprises the steps of: transmitting a random access preamble to a network from a slot based on a subcarrier spacing (SCS) exceeding a predetermined threshold value; monitoring downlink control information (DCI) based on a specific radio network temporary identifier (RNTI) corresponding to the random access preamble; and receiving a downlink data channel from the network, on the basis of scheduling information included in the DCI, wherein the specific RNTI is determined on the basis of a value derived via a modulo operation using 2M−K as a divisor, M is associated with an offset value for distinguishing the type of the random access procedure, and K may be an integer exceeding 12.
1 . A method performed by a terminal in a wireless communication system, the method comprising:
transmitting a random access preamble to a network in a slot based on a subcarrier spacing (SCS) exceeding a predetermined threshold;
monitoring a downlink control information (DCI) based on a specific radio network temporary identifier (RNTI) corresponding to the random access preamble; and
receiving a downlink data channel from the network based on scheduling information included in the DCI,
wherein the specific RNTI is determined based on a value derived by a modulo operation using 2 M −K as a divisor, M is associated with an offset value for distinguishing a type of a random access procedure, and K is an integer exceeding 12.
2 . The method according to claim 1 , wherein:
a candidate value of the specific RNTI based on the K does not overlap with a candidate value of another RNTI.
3 . The method according to claim 2 , wherein:
the candidate value of the another RNTI includes a value defined as a paging (P)-RNTI, a system information (SI)-RNTI, and a reserved RNTI.
4 . The method according to claim 1 , wherein:
the specific RNTI is a random access (RA)-RNTI related to a type-1 random access procedure or a message B (MSGB)-RNTI related to a type-2 random access procedure.
5 . The method according to claim 4 , wherein:
a range of a candidate value of the RA-RNTI does not overlap with a range of a candidate value of the MSGB-RNTI.
6 . The method according to claim 1 , wherein:
the DCI includes a random access indication field,
the specific RNTI is determined based on the value derived by the modulo operation and a value of the random access indication field.
7 . The method according to claim 6 , wherein:
the value of the random access indication field is determined based on a floor operation using 2 M −K as a denominator.
8 . The method according to claim 1 , wherein:
the predetermined threshold is 120 kHz.
9 . The method according to claim 1 , wherein:
the M is one of 16, 15 or 14.
10 . The method according to claim 1 , wherein:
the K is 14.
11 . A terminal in a wireless communication system, the terminal comprising:
at least one transceiver; and
at least one processor connected to the at least one transceiver,
wherein the at least one processor is configured to:
transmit, through the at least one transceiver, a random access preamble to a network in a slot based on a subcarrier spacing (SCS) exceeding a predetermined threshold;
monitor a downlink control information (DCI) based on a specific radio network temporary identifier (RNTI) corresponding to the random access preamble; and
receive, through the at least one transceiver, a downlink data channel from the network based on scheduling information included in the DCI,
wherein the specific RNTI is determined based on a value derived by a modulo operation using 2 M −K as a divisor, M is associated with an offset value for distinguishing a type of a random access procedure, and K is an integer exceeding 12.
12 . A base station for responding to a random access procedure of a terminal in a wireless communication system, the base station comprising:
at least one transceiver; and
at least one processor connected to the at least one transceiver,
wherein the at least one processor is configured to:
receive, through the at least one transceiver, a random access preamble from a terminal in a slot based on a subcarrier spacing (SCS) exceeding a predetermined threshold; and
transmit, through the at least one transceiver, to the terminal, a downlink control information (DCI) based on a specific radio network temporary identifier (RNTI) corresponding to the random access preamble and a downlink data channel based on scheduling information included in the DCI,
wherein the specific RNTI is determined based on a value derived by a modulo operation using 2 M −K as a divisor, M is associated with an offset value for distinguishing a type of a random access procedure, and K is an integer exceeding 12.