Methods and apparatus for transmitting RACH in wireless communication system
The present disclosure relates to a pre-5 th -Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4 th -Generation (4G) communication system such as Long Term Evolution (LTE). A method for operating a terminal in a wireless communication system includes receiving configuration information regarding a random access channel (RACH) from a base station, and transmitting a RACH preamble based on the configuration information. The configuration information includes information indicating the number of RACH transmission occasions in a frequency axis. A terminal includes a processor configured to receive configuration information regarding a RACH from a base station, and transmit a RACH preamble according to the configuration information, wherein the configuration information includes information indicating the number of RACH transmission occasions in a frequency axis.
1 . A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a master information block (MIB) on a frequency range, wherein the frequency range is one of a first frequency range or a second frequency range;
receiving, from the base station, a system information block (SIB) based on the MIB;
in case that the frequency range is the first frequency range, identifying that a subcarrier spacing (SCS) for transmitting a physical random access channel (PRACH) is a first SCS;
in case that the frequency range is the second frequency range, identifying that the SCS is a second SCS; and
transmitting, to the base station, the PRACH based on the first SCS or the second SCS.
2 . The method of claim 1 ,
wherein the first SCS is one of 15 kHz or 30 kHz, and
wherein the second SCS is one of 60 kHz or 120 kHz.
3 . The method of claim 1 ,
wherein the SIB further includes first information indicating a number of PRACH transmission occasions.
4 . The method of claim 3 ,
wherein the PRACH is transmitted on a PRACH occasion among the PRACH transmission occasions, the PRACH occasion being associated with a synchronization signal block (SSB), and
wherein an index of the PRACH occasion is used for determining a random access-radio network temporary identity (RA-RNTI).
5 . The method of claim 1 ,
wherein the SIB further includes second information indicating a preamble format of the PRACH,
wherein, in case that the frequency range is the first frequency range, a first preamble format corresponding to the first frequency range is identified based on the second information,
wherein, in case that the frequency range is the second frequency range, a second preamble format corresponding to the second frequency range is identified based on the second information, the second preamble format being different from the first preamble format, and
wherein the PRACH is transmitted based on the first preamble format or based on the second preamble format.
6 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a master information block (MIB) on a frequency range, wherein the frequency range is one of a first frequency range or a second frequency range;
transmitting, to the terminal, a system information block (SIB) based on the MIB; and
receiving, from the terminal, a physical random access channel (PRACH) based on a subcarrier spacing (SCS) for receiving the PRACH,
wherein, in case that the frequency range is the first frequency range, the SCS is a first SCS,
wherein, in case that the frequency range is the second frequency range, the SCS is a second SCS.
7 . The method of claim 6 ,
wherein the first SCS is one of 15 kHz or 30 kHz, and
wherein the second SCS is one of 60 kHz or 120 kHz.
8 . The method of claim 6 ,
wherein the SIB further includes first information indicating a number of PRACH transmission occasions.
9 . The method of claim 8 ,
wherein the PRACH is received on a PRACH occasion among the PRACH transmission occasions, the PRACH occasion being associated with a synchronization signal block (SSB), and
wherein an index of the PRACH occasion is associated with a random access-radio network temporary identity (RA-RNTI).
10 . The method of claim 6 ,
wherein the SIB further includes second information indicating a preamble format of the PRACH,
wherein, in case that the frequency range is the first frequency range, the preamble format is a first preamble format corresponding to the first frequency range based on the second information,
wherein, in case that the frequency range is the second frequency range, the preamble format is a second preamble format corresponding to the second frequency range based on the second information, the second preamble format being different from the first preamble format, and
wherein the PRACH is received based on the first preamble format or based on the second preamble format.
11 . A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive, from a base station, a master information block (MIB) on a frequency range, wherein the frequency range is one of a first frequency range or a second frequency range;
receive, from the base station, a system information block (SIB) based on the MIB;
in case that the frequency range is the first frequency range, identify that a subcarrier spacing (SCS) for transmitting a physical random access channel (PRACH) is a first SCS;
in case that the frequency range is the second frequency range, identify that the SCS is a second SCS; and
transmit, to the base station, the PRACH based on the first SCS or the second SCS.
12 . The terminal of claim 11 ,
wherein the first SCS is one of 15 kHz or 30 kHz, and
wherein the second SCS is one of 60 kHz or 120 KHz.
13 . The terminal of claim 11 ,
wherein the SIB further includes first information indicating a number of PRACH transmission occasions.
14 . The terminal of claim 13 ,
wherein the PRACH is transmitted on a PRACH occasion among the PRACH transmission occasions, the PRACH occasion being associated with a synchronization signal block (SSB), and
wherein an index of the PRACH occasion is used for determining a random access-radio network temporary identity (RA-RNTI).
15 . The terminal of claim 11 ,
wherein the SIB further includes second information indicating a preamble format of the PRACH,
wherein, in case that the frequency range is the first frequency range, a first preamble format corresponding to the first frequency range is identified based on the second information,
wherein, in case that the frequency range is the second frequency range, a second preamble format corresponding to the second frequency range is identified based on the second information, the second preamble format being different from the first preamble format, and
wherein the PRACH is transmitted based on the first preamble format or based on the second preamble format.
16 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
transmit, to a terminal, a master information block (MIB) on a frequency range;
wherein the frequency range is one of a first frequency range or a second frequency range;
transmit, to the terminal, a system information block (SIB) based on the MIB; and
receive, from the terminal, a physical random access channel (PRACH) based on a subcarrier spacing (SCS) for receiving the PRACH,
wherein, in case that the frequency range is the first frequency range, the SCS is a first SCS, and
wherein, in case that the frequency range is the second frequency range, the SCS is a second SCS.
17 . The base station of claim 16 ,
wherein the first SCS is one of 15 kHz or 30 kHz, and
wherein the second SCS is one of 60 kHz or 120 kHz.
18 . The base station of claim 16 ,
wherein the SIB further includes first information indicating a number of PRACH transmission occasions.
19 . The base station of claim 18 ,
wherein the PRACH is received on a PRACH occasion among the PRACH transmission occasions, the PRACH occasion being associated with a synchronization signal block (SSB), and
wherein an index of the PRACH occasion is associated with a random access-radio network temporary identity (RA-RNTI).
20 . The base station of claim 16 ,
wherein the SIB further includes second information indicating a preamble format of the PRACH,
wherein, in case that the frequency range is the first frequency range, the preamble format is a first preamble format corresponding to the first frequency range based on the second information,
wherein, in case that the frequency range is the second frequency range, the preamble format is a second preamble format corresponding to the second frequency range based on the second information, the second preamble format being different from the first preamble format, and
wherein the PRACH is received based on the first preamble format or based on the second preamble format.