Multipoint transmission in wireless communication

Patent metadata

Field	Value
Publication number	US-12389406-B2
Application number	US-202318517226-A
Country	US
Kind code	B2
Filing date	Nov 22, 2023
Priority date	Sep 30, 2011
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

Embodiments contemplate wireless transmit/receive unit (WTRU) transmissions of different types of uplink channels and/or signals in a system deployment where multiple destination points may exist. Some embodiments contemplate that a WTRU may select the destination point of a transmission on a dynamic basis. In one or more systems where destination point selection from among multiple potential destination points may be possible for a WTRU transmission, some embodiments contemplate the determination of the handling of hybrid automatic repeat request (HARQ) retransmissions and for different power headroom reporting mechanisms. Embodiments also contemplate the reduction and/or inhibition of WTRU transmissions to destination points to which the WTRU may have lost connectivity.

First claim

What is claimed is:

1. A method performed by a wireless transmit/receive unit (WTRU), the method comprising:
receiving uplink configuration information indicating a set of power control parameters, wherein the set of power control parameters indicates at least information of a partial path-loss compensation;
selecting, based on a downlink control information (DCI), the set of power control parameters for an uplink transmission;
determining, based on the selected set of power control parameters and the DCI, the partial path-loss compensation for the uplink transmission;
determining a power control adjustment state for the uplink transmission; and
transmitting the uplink transmission using a power determined based on at least the partial path-loss compensation and the power control adjustment state.

2. The method of claim 1 , further comprising:
maintaining a set of power control adjustment states, and
selecting the power control adjustment state from the set of power control adjustment states.

3. The method of claim 1 , wherein the DCI is associated with one or more transmit power control (TPC) commands.

4. The method of claim 1 , wherein the uplink transmission is transmitted via a physical uplink shared channel (PUSCH).

5. The method of claim 1 , further comprising maintaining at least a transmit power control (TPC) command chain.

6. The method of claim 1 , wherein the uplink configuration information comprises a radio resource control (RRC) configuration, and the set of power control parameters is configured by the RRC configuration.

7. The method of claim 1 , wherein the DCI comprises a DCI format.

8. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
receive uplink configuration information indicating a set of power control parameters, wherein the set of power control parameters indicates at least information of a partial path-loss compensation;
select, based on a downlink control information (DCI), the set of power control parameters for an uplink transmission;
determine, based on the selected set of power control parameters and the DCI, the partial path-loss compensation for the uplink transmission;
determine a power control adjustment state for the uplink transmission; and
transmit the uplink transmission using a power determined based on the partial path-loss compensation and the power control adjustment state.

9. The WTRU of claim 8 , wherein the DCI comprises at least one of: a DCI field, a DCI format, or an index associated with the set of power control parameters.

10. The WTRU of claim 8 , wherein the uplink transmission is transmitted via a physical uplink shared channel (PUSCH).

11. The WTRU of claim 8 , wherein the processor is further configured to:
maintain a set of power control adjustment states, and
select the power control adjustment state from the set of power control adjustment states.

12. The WTRU of claim 8 , wherein the set of power control parameters comprises a maximum transmission power.

13. A wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
receive uplink configuration information indicating a set of power control parameters, wherein the set of power control parameters indicates at least information of a partial path-loss compensation;
select, based on a downlink control information (DCI), a set of power control parameters from the set of power control parameters for an uplink transmission;
determine, based on the selected set of power control parameters and the DCI, the partial path-loss compensation for the uplink transmission;
select a power control adjustment state for the uplink transmission from a set of power control adjustment states; and
transmit the uplink transmission using a power determined based on the partial path-loss compensation and the selected power control adjustment state.

14. The WTRU of claim 13 , wherein the processor is further configured to:
derive a path-loss estimate from a set of path-loss references, wherein the power used by a transmitter for transmitting the uplink transmission is further determined based on the derived path-loss estimate.

15. The WTRU of claim 13 , wherein the DCI comprises at least one of: a DCI field, a DCI format, or an index associated with the set of power control parameters.

16. The WTRU of claim 13 , wherein the processor is further configured to transmit the uplink transmission via a physical uplink shared channel.

17. The WTRU of claim 13 , wherein the processor is further configured to maintain the set of power control adjustment states and a transmit power control (TPC) command chain.

18. The WTRU of claim 13 , wherein the processor is further configured to determine a maximum transmit power associated with the uplink transmission.

19. The method of claim 1 , wherein the method further comprises deriving a path-loss estimate from a set of path-loss references, and wherein the set of path-loss references is indicated by the uplink configuration information and associated with the DCI.

20. The WTRU of claim 8 , wherein the processor is further configured to derive a path-loss estimate from a set of path-loss references, and wherein the set of path-loss references is indicated by the uplink configuration information and associated with the DCI.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Marinier Paul
• Pelletier Ghyslain
• Pani Diana
• Tooher J Patrick
• Cai Lujing

Classifications

• H04B7/0802

  using antenna selection (H04B7/0868 takes precedence; antenna beam directivity switching H01Q3/24) · CPC title

• H04W52/365

  Power headroom reporting · CPC title

• H04B7/024 Primary

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title

• H04W52/146

  Uplink power control · CPC title

• H04W72/21 Primary

  in the uplink direction of a wireless link, i.e. towards the network · CPC title