Method and apparatus for resource determination, resource configuration, transmitting random access preamble and random access
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as long term evolution (LTE). The method for operating a terminal in a wireless communication system is provided. The method includes receiving, from a base station, configuration information of an initial active uplink bandwidth part (UL BWP) and corresponding random access resource; based on the configuration information of the initial active UL BWP and the corresponding random access resource, determining corresponding physical random access channel (PRACH) occasions; and performing random access procedure based on the determined PRACH occasion.
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, system information, wherein the system information includes:
first configuration information including information related to a lowest numbered resource block of an initial uplink bandwidth part (UL BWP), and
second configuration information for physical random access channel (PRACH) transmission occasions, including information on a frequency offset of a lowest physical random access channel (PRACH) transmission occasion in a frequency domain with respect to the lowest numbered resource block of the initial UL BWP; and
transmitting, to the base station, a random access preamble on a PRACH transmission occasion of the PRACH transmission occasions based on the system information,
wherein, in case that the PRACH transmission occasion is associated with multiple synchronization signal blocks, a synchronization signal block of the multiple synchronization signal blocks is associated with a group of random access preambles, and
wherein the random access preamble is one of the group of random access preambles.
2. The method of claim 1 , wherein the second configuration information further includes information indicating a number of one or more PRACH transmission occasions multiplexed in the frequency domain.
3. The method of claim 2 , wherein the PRACH transmission occasions are located based on the information indicating a number of one or more PRACH transmission occasions multiplexed in the frequency domain, within the initial UL BWP.
4. The method of claim 1 , wherein a number of resource blocks occupied by the PRACH transmission occasion is obtained based on the second configuration information, and
wherein the random access preamble is transmitted based on the number of resource blocks occupied by the PRACH transmission occasion.
5. The method of claim 1 ,
wherein the lowest numbered resource block of the initial UL BWP corresponds to physical resource block (PRB) 0,
wherein the PRACH transmission occasions comprises PRACH transmission occasions that are consecutive in a frequency domain, and
wherein a lowest of the PRACH transmission occasions corresponds to a lowest index of the PRACH transmission occasions.
6. The method of claim 1 , wherein the multiple synchronization signal blocks are identified based on a reference signal received power (RSRP).
7. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a user equipment (UE), system information, wherein the system information includes:
first configuration information including information related to a lowest numbered resource block of an initial uplink bandwidth part (UL BWP), and
second configuration information for physical random access channel (PRACH) transmission occasions, including information on a frequency offset of a lowest physical random access channel (PRACH) transmission occasion in a frequency domain with respect to the lowest numbered resource block of the initial UL BWP; and
receiving, from the UE, a random access preamble on a PRACH transmission occasion of the PRACH transmission occasions based on the system information,
wherein, in case that the PRACH transmission occasion is associated with multiple synchronization signal blocks, a synchronization signal block of the multiple synchronization signal blocks is associated with a grouping of random access preambles, and
wherein the random access preamble is one of the group of random access preambles.
8. The method of claim 7 , wherein a number of resource blocks occupied by the PRACH transmission occasion is obtained based on the second configuration information, and
wherein the random access preamble is transmitted based on the number of resource blocks occupied by the PRACH transmission occasion.
9. The method of claim 7 , wherein the second configuration information further includes information indicating a number of one or more PRACH transmission occasions multiplexed in the frequency domain.
10. The method of claim 9 , wherein the PRACH transmission occasions are located based on the information indicating a number of one or more PRACH transmission occasions multiplexed in the frequency domain, within the initial UL BWP.
11. The method of claim 7 ,
wherein the lowest numbered resource block of the initial UL BWP corresponds to physical resource block (PRB) 0,
wherein the PRACH transmission occasions comprises PRACH transmission occasions that are consecutive in a frequency domain, and
wherein a lowest PRACH transmission occasion corresponds to a lowest index of the PRACH transmission occasions.
12. A user equipment (UE) in a wireless communication system, the UE comprising:
at least one transceiver; and
at least one processor configured to:
receive, from a base station, system information, wherein the system information includes:
first configuration information including information related to a lowest numbered resource block of an initial uplink bandwidth part (UL BWP), and
second configuration information for physical random access channel (PRACH) transmission occasions, including information on a frequency offset of a lowest physical random access channel (PRACH) transmission occasion in a frequency domain with respect to the lowest numbered resource block of the initial UL BWP, and
transmit, to the base station, a random access preamble on a PRACH transmission occasion of the PRACH transmission occasions based on the system information,
wherein, in case that the PRACH transmission occasion is associated with multiple synchronization signal blocks, a synchronization signal block of the multiple synchronization signal blocks is associated with a group of random access preambles, and wherein the random access preamble is one of the group of random access preambles.
13. The UE of claim 12 , wherein the second configuration information for a PRACH further includes information indicating a number of one or more PRACH transmission occasions multiplexed in the frequency domain.
14. The UE of claim 13 , wherein the PRACH transmission occasions are located based on the information indicating a number of one or more PRACH transmission occasions multiplexed in the frequency domain, within the initial UL BWP.
15. The UE of claim 12 , wherein a number of resource blocks occupied by the PRACH transmission occasion is obtained based on the second configuration information, and
wherein the random access preamble is transmitted based on the number of resource blocks occupied by the PRACH transmission occasion.
16. The UE of claim 12 , wherein the multiple synchronization signal blocks are identified based on a reference signal received power (RSRP).
17. The UE of claim 12 ,
wherein the lowest numbered resource block of the initial UL BWP corresponds to physical resource block (PRB) 0,
wherein the PRACH transmission occasions comprises PRACH transmission occasions that are consecutive in a frequency domain, and
wherein a lowest PRACH transmission occasion corresponds to a lowest index of the PRACH transmission occasions.