Method and apparatus for resource determination, resource configuration, transmitting random access preamble and random access

Patent metadata

Field	Value
Publication number	US-2020128588-A1
Application number	US-201916719864-A
Country	US
Kind code	A1
Filing date	Dec 18, 2019
Priority date	Sep 8, 2017
Publication date	Apr 23, 2020
Grant date	—

Abstract

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.

First claim

What is claimed is:

1 . A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, system information; and transmitting, to the base station, a random access preamble based on the system information, wherein the system information includes:
first configuration information for an initial uplink bandwidth part (UL BWP), including information for deriving a lowest numbered resource block of the initial UL BWP; and
second configuration information for a physical random access channel (PRACH) within the initial UL BWP, including information indicating a frequency offset of a lowest PRACH transmission occasion in a frequency domain with respect to the lowest numbered resource block of the initial UL BWP.

2 . The method of claim 1 , wherein the random access preamble is transmitted in frequency resources within the initial UL BWP, and
wherein the frequency resources are identified based on the information included in the second configuration information for the PRACH.

3 . The method of claim 1 , wherein the second configuration information for the PRACH further includes information indicating a number of PRACH transmission occasions.

4 . The method of claim 1 , wherein a number of resource blocks occupied by the PRACH is obtained based on a signal from the base station, and
wherein the random access preamble is transmitted based on the number of resource blocks occupied by the PRACH.

5 . The method of claim 1 , wherein the first configuration information about an initial UL BWP is acquired by any one of the following ways:
receiving indication information about a lowest numbered resource block of the initial UL BWP and indication information about bandwidth of the initial UL BWP; receiving indication information about the lowest numbered resource block of the UL BWP, and acquiring a pre-configured bandwidth of the initial UL BWP; receiving indication information about the bandwidth of the initial UL BWP, and acquiring a pre-configured lowest numbered resource block of the initial UL BWP; acquiring a pre-configured lowest numbered resource block and bandwidth of the initial UL BWP; and receiving an index for indicating the initial UL BWP.

6 . The method of the claim 1 , wherein the second configuration information about the PRACH is acquired by any one of the following ways:
receiving indication information about a position of lowest PRACH transmission occasion in frequency domain and indication information about a frequency offset between adjacent PRACHs; receiving indication information about a position of lowest PRACH transmission occasion in frequency domain, and acquiring a pre-configured offset between adjacent PRACHs; acquiring a pre-configured position of lowest PRACH transmission occasion in frequency domain, and receiving indication information about a frequency offset between adjacent PRACHs; and acquiring a pre-configured position of lowest PRACH transmission occasion in frequency domain and a frequency offset between adjacent PRACHs.

7 . A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a user equipment (UE), system information; and receiving, from the UE, a random access preamble based on the system information, wherein the system information includes:
first configuration information for an initial uplink bandwidth part (UL BWP) including information for deriving a lowest numbered resource block of the initial UL BWP; and
second configuration information for a physical random access channel (PRACH), within the initial UL BWP, including information for indicating a frequency offset of a lowest PRACH transmission occasion in a frequency domain with respect to the lowest numbered resource block of the initial UL BWP.

8 . The method of claim 7 , wherein the random access preamble is transmitted by using frequency resources within the initial UL BWP, and
wherein the frequency resources are identified based on the information included in the second configuration information for the PRACH.

9 . The method of claim 7 , wherein the second configuration information for the PRACH further includes information indicating a number of PRACH transmission occasions.

10 . The method of claim 7 , wherein a number of resource blocks occupied by the PRACH is obtained based on a signal from the base station, and
wherein the random access preamble is transmitted based on the number of resource blocks occupied by the PRACH.

11 . The method of the claim 7 , wherein the initial UL BWP is configured by any one of the following ways:
configuring indication information about a lowest numbered resource block of the initial UL BWP and indication information about bandwidth of the initial UL BWP; configuring indication information about the lowest numbered resource block of the initial UL BWP; configuring indication information about the bandwidth of the initial UL BWP; and configuring an index for indicating the initial UL BWP.

12 . The method of the claim 7 , wherein the second configuration information is configured by any one of the following ways:
configuring indication information about a position of lowest PRACH transmission occasion in frequency domain and indication information about a frequency offset between adjacent PRACHs; configuring indication information about the position of lowest PRACH transmission occasion in frequency domain; and configuring indication information about the offset between adjacent PRACHs.

13 . The method of the claim 7 , further comprising steps of:
configuring a beam failure recovery request resource corresponding to the second configuration information; and transmitting, to the UE, configuration information of the beam failure recovery request resource.

14 . A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; at least one processor configured to:
receive, from a base station, system information; and
transmit, to the base station, a random access preamble based on the system information,
wherein the system information includes:
first configuration information for an initial uplink bandwidth part (UL BWP) including information for deriving a lowest numbered resource block of the initial UL BWP; and
second configuration information for a physical random access channel (PRACH), within the initial UL BWP, including information indicating a frequency offset of a lowest PRACH transmission occasion in a frequency domain with respect to the lowest numbered resource block of the initial UL BWP.

15 . The UE of claim 14 , wherein the random access preamble is transmitted in frequency resources within the initial UL BWP, and
wherein the frequency resources are identified based on the information included in the second configuration information for the PRACH.

16 . The UE of claim 14 , wherein the second configuration information for the PRACH further includes information indicating a number of PRACH transmission occasions.

17 . The UE of claim 14 , wherein a number of resource blocks occupied by the PRACH is obtained based on a signal from the base station, and
wherein the random access preamble is transmitted based on the number of resource blocks occupied by the PRACH.

18 . The UE of claim 14 , to acquire the first configuration information, wherein the at least one processor is configured to:
receive indication information about a lowest numbered resource block of the initia

Assignees

• Samsung Electronics Co Ltd

Inventors

• Xiong Qi
• Qian Chen
• Yu Bin
• Sun Feifei

Classifications

• H04W74/0833 Primary

  Random access procedures, e.g. with 4-step access · CPC title

• H04W74/006

  in the downlink, i.e. towards the terminal · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W48/08

  Access restriction or access information delivery, e.g. discovery data delivery (signalling during connection H04W76/00) · CPC title

• H04W72/042

  Electricity · mapped topic