Methods and systems for update of cell-specific koffset in NTN

Inventors: Bharat Shrestha (San Diego, CA); Ayan Sengupta (San Diego, CA); Xiao Feng Wang (San Diego, CA); Alberto Rico Alvarino (San Diego, CA); Umesh Phuyal (San Diego, CA); Liangping Ma (San Diego, CA)

Assignee: QUALCOMM Incorporated

H04W76/27 H04W48/16 H04W76/11

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Quick Facts

Patent No.: US 12677346
App. No.: 18/066,702
Granted: Jul 7, 2026
Kind: B2

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Abstract

A user equipment may be configured to implement a procedure for implementing a procedure for updating cell-specific parameters used by a UE in non-terrestrial networks (NTN). In some aspects, the UE may receive, from a network entity, during a modification period of system information, system information including one or more cell-specific parameters. Further, the UE may enter a radio resource configuration (RRC) connected mode based upon receipt of the system information, and transmit an acquisition indication of receipt of the system information, the acquisition indication identifying an instance within the modification period of receipt of the system information.

Claims (33)

1 . A user equipment (UE) for non-terrestrial network (NTN) wireless communication, comprising:

a memory storing computer-executable instructions; and

at least one processor coupled with the memory and configured to execute the computer-executable instructions to:

receive, from a network entity, during a modification period of system information, system information including one or more cell-specific parameters;

enter a radio resource configuration (RRC) connected mode based upon receipt of the system information; and

transmit an acquisition indication of receipt of the system information, the acquisition indication identifying an instance within the modification period of receipt of the system information.

2 . The UE of claim 1 , wherein the system information is one of four system information blocks of type thirty-one (SIB31) periodically transmitted by the network entity during the modification period.

3 . The UE of claim 1 , wherein the acquisition indication includes an index identifier identifying a particular sub-period of a plurality of sub-periods of the modification period as a sub-period in which the system information was received, wherein the network entity transmits an individual SystemInformationBlockType31 (SIB31) during each sub-period of the plurality of sub-periods.

4 . The UE of claim 1 , wherein to transmit the acquisition indication, the at least one processor is further configured to execute the computer-executable instructions to:

determine that system information was received within a last sub-period of a plurality of sub-periods; and

transmit the acquisition indication including an index identifier in response to the system information being received within the last sub-period of the plurality of sub-periods.

5 . The UE of claim 1 , wherein the acquisition indication includes a modification period identifier identifying a particular half of the modification period as a half of the modification period in which the system information was received.

6 . The UE of claim 1 , wherein the acquisition indication is a radio resource configuration (RRC) message or a media access control-control element (MAC-CE) message, or wherein the acquisition indication is included in a message 1, message 3, message 5, or message A of a random access procedure for entering the radio resource configuration (RRC) connected mode.

7 . The UE of claim 1 , wherein the system information includes a request for transmission of the acquisition indication in response to receipt of the system information.

8 . The UE of claim 1 , wherein a message 4 of a random access channel procedure requests transmission of the acquisition indication in response to receipt of the system information.

9 . The UE of claim 1 , wherein the system information includes first system information, the modification period is a first modification period, the one or more cell-specific parameters are one or more first cell-specific parameters, and the at least one processor is further configured to execute the computer-executable instructions to:

receiving, from the network entity, during a second modification period of system information, second system information including one or more second cell-specific parameters in response to the network entity determining that the one or more first cell-specific parameters are outdated based on the acquisition indication.

10 . The UE of claim 1 , wherein the system information includes a cell-specific K_offset and a K_mac.

11 . A method of non-terrestrial network (NTN) wireless communication at a user equipment (UE), comprising:

receiving, from a network entity, during a modification period of system information, system information including one or more cell-specific parameters;

entering a radio resource configuration (RRC) connected mode based upon receipt of the system information; and

transmitting an acquisition indication of receipt of the system information, the acquisition indication identifying an instance within the modification period of receipt of the system information.

12 . The method of claim 11 , wherein the system information is one of four system information blocks of type thirty-one (SIB31) or system information blocks of type nineteen (SIB19) periodically transmitted by the network entity during the modification period, and the system information includes a cell-specific K_offset and a K_mac.

13 . The method of claim 11 , wherein the acquisition indication includes an index identifier identifying a particular sub-period of a plurality of sub-periods of the modification period as a sub-period in which the system information was received, wherein the network entity transmits an individual SystemInformationBlockType31 (SIB31) or SystemInformationBlockType19 (SIB19) during each sub-period of the plurality of sub-periods.

14 . The method of claim 13 , wherein transmitting the acquisition indication comprises:

determining that system information was received within a last sub-period of the plurality of sub-periods; and

transmitting the acquisition indication including the index identifier in response to system information being received within the last sub-period of the plurality of sub-periods.

15 . The method of claim 11 , wherein the acquisition indication includes a modification period identifier identifying a particular half of the modification period as a half of the modification period in which the system information was received.

16 . The method of claim 11 , wherein the acquisition indication is a radio resource configuration (RRC) message or a media access control-control element (MAC-CE) message, or wherein the acquisition indication is included in a message 1, a message 3, message 5, or message A of a random access procedure for entering the RRC connected mode.

17 . The method of claim 11 , wherein the system information includes first system information, the modification period is a first modification period, the one or more cell-specific parameters are one or more first cell-specific parameters, and further comprising:

18 . The method of claim 11 , wherein the system information includes first system information, the modification period is a first modification period, and further comprising:

receiving, from the network entity, during a second modification period of system information, second system information including an update to timing information of the one or more cell-specific parameters in response to the network entity evaluating the acquisition indication.