SSB to RACH resource associations and related RACH configuration contents in multi-beam system

Patent metadata

Field	Value
Publication number	US-10687366-B2
Application number	US-201816128568-A
Country	US
Kind code	B2
Filing date	Sep 12, 2018
Priority date	Sep 29, 2017
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

A method of performing, by a device, a random access procedure in a radio communication system includes: receiving from a base station RACH configuration information; and transmitting a first message based on the received RACH configuration information. Herein, a plurality of SSBs may be in association with a plurality of preambles, and the first message may be transmitted in a time domain through a plurality of RACH resources.

First claim

What is claimed is:

1. A method of performing a random access procedure, wherein a device performs a random access procedure in a radio communication system, the method comprising:
receiving random access channel (RACH) configuration information from a base station; and
transmitting message 1 including a preamble to the base station using one or more RACH resources indicated by the received RACH configuration information,
wherein a plurality of synchronization signal blocks (SSBs) are respectively in association with a plurality of preambles which are identical, and
wherein when a number of Tx beams and a number of Rx beams of the base station are identical, the message 1 in association with one SSB is transmitted in two consecutive RACH resources.

2. The method of claim 1 , wherein the plurality of SSBs are identified based on a position of each of the one or more RACH resources.

3. The method of claim 1 , wherein when the number of Tx beams is larger than the number of Rx beams, the message 1 in association with a boundary Tx beam is transmitted in two consecutive RACH resources, and the message 1 in association with non-boundary Tx beam is transmitted in one RACH resource.

4. The method of claim 1 , wherein when the number of Tx beams is smaller than the number of Rx beams, a beam sweeping timing of a boundary Rx beam and a beam sweeping timing of non-boundary Rx beam are differently set.

5. The method of claim 1 , wherein the random access procedure is applied to a frequency smaller than 6 GHz.

6. A method of performing a random access procedure, wherein a device performs a random access procedure in a radio communication system, the method comprising:
receiving random access channel (RACH) configuration information from a base station; and
transmitting message 1 including a plurality of preambles to the base station using one or more RACH resources indicated by the received RACH configuration information,
wherein a plurality of synchronization signal blocks (SSBs) are respectively in association with the plurality of preambles which are different, and
wherein when a number of Tx beams and a number of Rx beams of the base station are identical, the message 1 is transmitted in one RACH resource.

7. The method of claim 6 , wherein the plurality of SSBs are respectively identified based on the plurality of preambles.

8. The method of claim 6 , wherein when the number of Tx beams is larger than the number of Rx beams, the message 1 of an SSB in association with a boundary Tx beam is transmitted in two consecutive RACH resources, and the message 1 of an SSB in association with non-boundary Tx beam is transmitted in one RACH resource.

9. The method of claim 6 , wherein when the number of Tx beams is smaller than the number of Rx beams, the message 1 in association with an SSB monitored by a boundary Rx beam is transmitted in two consecutive RACH resources.

10. A method of performing a random access procedure, wherein a base station performs a random access procedure in a radio communication system, the method comprising:
determining information to be included in random access channel (RACH) configuration information in consideration of a synchronization signal block (SSB) and RACH resource association relation;
transmitting the RACH configuration information to a device; and
receiving from the device message 1 in one or more RACH resources indicated by the RACH configuration information,
wherein a plurality of SSBs are respectively in association with a plurality of preambles which are identical, and
wherein when a number of Tx beams and a number of Rx beams of the base station are identical, the message 1 in association with one SSB is transmitted in two consecutive RACH resources.

11. The method of claim 10 , wherein the plurality of SSBs are identified by respective positions of each of the one or more RACH resources.

12. The method of claim 10 , wherein when the number of Tx beams is larger than the number of Rx beams, the message 1 of an SSB in association with a boundary Tx beam is transmitted in two consecutive RACH resources, and the message 1 of an SSB in association with non-boundary Tx beam is transmitted in one RACH resource.

13. The method of claim 10 , wherein when the number of Tx beams is smaller than the number of Rx beams, a beam sweeping timing of a boundary Rx beam and a beam sweeping timing of non-boundary Rx beam are differently set.

14. A method of performing a random access procedure, wherein a base station performs a random access procedure in a radio communication system, the method comprising:
determining information to be included in random access channel (RACH) configuration information in consideration of a synchronization signal block (SSB) and RACH resource association relation;
transmitting the RACH configuration information to a device; and
receiving from the device a message 1 in one or more RACH resources indicated by the RACH configuration information,
wherein a plurality of SSBs are respectively in association with a plurality of preambles different from each other,
wherein when a number of Tx beams and a number of Rx beams of the base station are identical, the message 1 including the plurality of preambles is transmitted in one RACH resource.

15. The method of claim 14 , wherein the plurality of SSBs are respectively identified based on the plurality of preambles.

16. The method of claim 14 , wherein when the number of Tx beams is larger than the number of Rx beams, the message 1 of an SSB in association with a boundary Tx beam is transmitted in two consecutive RACH resources, and the message 1 of an SSB in association with non-boundary Tx beam is transmitted in one RACH resource.

17. The method of claim 14 , wherein the number of Tx beams is smaller than the number of Rx beams, the message 1 in association with an SSB monitored by a boundary Rx beam is transmitted in two consecutive RACH resources.

Assignees

• Electronics & Telecommunications Res Inst
• Electronics And Telcommunications Res Institute

Inventors

• Hui Bing
• Kim Il Gyu
• Kim Jun Hyeong
• Noh Go San
• Chung Hee Sang
• Choi Sung Woo

Classifications

• H04W74/0833 Primary

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

• H04W16/32

  Hierarchical cell structures · CPC title

• H04W56/001

  Synchronization between nodes · CPC title

• H04W48/16

  Discovering, processing access restriction or access information · CPC title

• H04W72/046

  the resource being in the space domain, e.g. beams · CPC title