Method for grant free uplink transmission, user equipment and base station device

Patent metadata

Field	Value
Publication number	US-12408128-B2
Application number	US-202418668830-A
Country	US
Kind code	B2
Filing date	May 20, 2024
Priority date	May 10, 2018
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

The present disclosure provides a grant free uplink transmission method, the method is performed at a user equipment side, comprising: determining, according to configuration information for grant free uplink transmission received from a base station, a radio network temporary identifier GF-RNTI for grant free uplink transmission, and transmitting an uplink signal; and monitoring feedback from the base station in a downlink control channel by using the determined GF-RNTI. The present disclosure also provides a user equipment and a base station for grant free uplink transmission.

First claim

What is claimed is:

1. A method performed by a terminal in a wireless communication, the method comprising:
identifying whether physical random access channel (PRACH) occasions for a 4-step random access type are shared with a 2-step random access type; and
based on the PRACH occasions for the 4-step random access type being shared with the 2-step random access type, transmitting, to a base station, a message A including a preamble based on a first configuration of PRACH occasions,
wherein, based on the PRACH occasions for the 4-step random access type being shared with the 2-step random access type, an index of the preamble associated with a synchronization signal block (SSB) is determined based on a starting preamble index and a total number of preambles for the 4-step random access type.

2. The method of claim 1 , further comprising:
based on the PRACH occasions for the 4-step random access type not being shared with the 2-step random access type, transmitting, to the base station, a message A including a preamble based on a second configuration of PRACH occasions,
wherein the second configuration of PRACH occasions is separately configured for the 2-step random access type.

3. The method of claim 1 , further comprising:
receiving, from the base station, the first configuration of the PRACH occasions.

4. The method of claim 1 , further comprising:
receiving, from the base station, a message indicating whether the PRACH occasions for the 4-step random access type is shared with the 2-step random access type.

5. The method of claim 4 , wherein the message further includes information indicating a subset of the PRACH occasions for the 4-step random access type shared with the 2-step random access type.

6. A method performed by a base station in a wireless communication, the method comprising:
identifying whether physical random access channel (PRACH) occasions for a 4-step random access type are shared with a 2-step random access type for a terminal; and
based on the PRACH occasions for the 4-step random access type being shared with the 2-step random access type, receiving, from the terminal, a message A including a preamble based on a first configuration of PRACH occasions,
wherein, based on the PRACH occasions for the 4-step random access type being shared with the 2-step random access type, an index of the preamble associated with a synchronization signal block (SSB) is determined based on a starting preamble index and a total number of preambles for the 4-step random access type.

7. The method of claim 6 , further comprising:
based on the PRACH occasions for the 4-step random access type not being shared with the 2-step random access type, receiving, from the terminal, a message A including a preamble based on a second configuration of PRACH occasions,
wherein the second configuration of PRACH occasions is separately configured for the 2-step random access type.

8. The method of claim 6 , further comprising:
transmitting, to the terminal, the first configuration of the PRACH occasions.

9. The method of claim 6 , further comprising:
transmitting, to the terminal, a message indicating whether the PRACH occasions for the 4-step random access type is shared with the 2-step random access type.

10. The method of claim 9 , wherein the message further includes information indicating a subset of the PRACH occasions for the 4-step random access type shared with the 2-step random access type.

11. A terminal in a wireless communication, the terminal comprising:
a transceiver; and
a controller configured to:
identify whether physical random access channel (PRACH) occasions for a 4-step random access type are shared with a 2-step random access type, and
based on the PRACH occasions for the 4-step random access type being shared with the 2-step random access type, transmit, to a base station via the transceiver, a message A including a preamble based on a first configuration of PRACH occasions,

wherein, based on the PRACH occasions for the 4-step random access type being shared with the 2-step random access type, an index of the preamble associated with a synchronization signal block (SSB) is determined based on a starting preamble index and a total number of preambles for the 4-step random access type.

12. The terminal of claim 11 ,
wherein the controller is further configured to:
based on the PRACH occasions for the 4-step random access type not being shared with the 2-step random access type, transmit, to the base station via the transceiver, a message A including a preamble based on a second configuration of PRACH occasions, and

wherein the second configuration of PRACH occasions is separately configured for the 2-step random access type.

13. The terminal of claim 11 , wherein the controller is further configured to:
receive, from the base station via the transceiver, the first configuration of the PRACH occasions.

14. The terminal of claim 11 , wherein the controller is further configured to:
receive, from the base station via the transceiver, a message indicating whether the PRACH occasions for the 4-step random access type is shared with the 2-step random access type.

15. The terminal of claim 14 , wherein the message further includes information indicating a subset of the PRACH occasions for the 4-step random access type shared with the 2-step random access type.

16. A base station in a wireless communication, the base station comprising:
a transceiver; and
a controller configured to:
identify whether physical random access channel (PRACH) occasions for a 4-step random access type are shared with a 2-step random access type for a terminal, and
based on the PRACH occasions for the 4-step random access type being shared with the 2-step random access type, receive, from the terminal, a message A including a preamble based on a first configuration of PRACH occasions,

wherein, based on the PRACH occasions for the 4-step random access type being shared with the 2-step random access type, an index of the preamble associated with a synchronization signal block (SSB) is determined based on a starting preamble index and a total number of preambles for the 4-step random access type.

17. The base station of claim 16 ,
wherein the controller is further configured to:
based on the PRACH occasions for the 4-step random access type not being shared with the 2-step random access type, receive, from the terminal, a message A including a preamble based on a second configuration of PRACH occasions, and

wherein the second configuration of PRACH occasions is separately configured for the 2-step random access type.

18. The base station of claim 16 , wherein the controller is further configured to:
transmit, to the terminal, the first configuration of the PRACH occasions.

19. The base station of claim 16 , wherein the controller is further configured to:
transmit, to the terminal, a message indicating whether the PRACH occasions for the 4-step random access type is shared with the 2-step random access type.

20. The base station of claim 19 , wherein the message further includes information indicating a subset of the PRACH occasions for the 4-step random access type shared with the 2-step random access type.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Xiong Qi
• Yu Bin
• Qian Chen

Classifications

• H04W74/0836

  with 2-step access · CPC title

• H04W74/0891

  for synchronized access · CPC title

• 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

• H04W74/004

  in the uplink, i.e. towards network · CPC title