Granted Patent B2

US 12,356,492 · App. 17/598,241 · Granted Jul 8, 2025

Inventors: Fangli Xu (Cupertino, CA); Chunhai Yao (Cupertino, CA); Haijing A. Hu (Cupertino, CA); Murtazak A. Shikari (Cupertino, CA); Sarma V. Vangala (Cupertino, CA); Srinivasan Nimmala (Cupertino, CA); Dawei Zheng (Beijing, CN)

Assignee: Apple Inc.

H04W76/27H04W56/0045H04W72/12H04W74/0833

Abstract

Claims (74)

1. A user equipment (UE) device comprising: an antenna;

a memory;

radio frequency (RF) circuitry commutatively coupled to the antenna; and a processor configured to perform operations comprising:

receiving a dedicated radio resource control RRC message comprising one or more pre-configured grant (pre-CG) configurations for an RRC inactive (RRC_INACTIVE) state from a network node, wherein the one or more pre-CG configurations are for an initial data transmission when the UE is in the RRC_INACTIVE state;

entering the RRC_INACTIVE state;

receiving a broadcast message comprising an indication if a cell sending the broadcast message supports the initial data transmission using a pre-CG resource;

triggering the initial data transmission using the pre-CG resource to the cell based on the received one or more pre-CG configurations based on the indication in the broadcast message; and

performing, while the UE is in the RRC_INACTIVE state, the initial data transmission using a pre-CG resource based on the received one or more pre-CG configurations.

2. The UE device of claim 1 , wherein each of the one or more pre-CG configurations comprises a configuration of the pre-CG resource and one or more conditions to use the pre-CG resource.

3. A baseband (BB) processor of a user equipment (UE) in a wireless communication system configured to perform operations comprising:

receiving a dedicated radio resource control RRC message comprising one or more pre-configured grant (pre-CG) configurations for an RRC inactive (RRC_INACTIVE) state from a network node, wherein the one or more pre-CG configurations are for an initial data transmission when the UE is in the RRC_INACTIVE state;

entering the RRC_INACTIVE state;

receiving a broadcast message comprising an indication if a cell sending the broadcast message supports the initial data transmission using a pre-CG resource;

triggering the initial data transmission using the pre-CG resource to the cell based on the received one or more pre-CG configurations based on the indication in the broadcast message; and

performing, while the UE is in the RRC_INACTIVE state, the initial data transmission using a pre-CG resource based on the received one or more pre-CG configurations.

4. The BB processor of claim 3 , wherein each of the one or more pre-CG configurations comprises a configuration of the pre-CG resource and one or more conditions to use the pre-CG resource.

5. The BB processor of claim 4 , wherein the one or more conditions to use the pre-CG resource comprise one or more of an access type, a transmission priority, a mapped Logical Channel (LCH)/Dedicated Radio Bearer (DRB)/Quality of Service (QOS) flow, and a valid timing advance (TA).

6. The BB processor of claim 3 , wherein the dedicated RRC message comprises a list of cells for which the one or more pre-CG configurations are valid, and the operations further comprise:

determining whether a current camping cell is included in the list of cells for which the one or more pre-CG configurations are valid; and

triggering the initial data transmission using the pre-CG resource to the current camping cell based on the determination.

7. The BB processor of claim 3 , wherein the operations further comprise

receiving a System Information Block (SIB) comprising the one or more pre-CG configurations for the RRC_INACTIVE state from a current camping cell.

8. The BB processor of claim 3 , wherein each of the one or more pre-CG configurations comprises a configuration of the pre-CG resource and one or more conditions to use the pre-CG resource, and the operations further comprise:

determining whether the UE has data to be transmitted when the UE is in the RRC_INACTIVE state;

determining whether the one or more pre-CG configurations are configured and the one or more conditions to use the pre-CG resource are fulfilled;

if the one or more conditions to use the pre-CG resource are fulfilled, performing the initial data transmission using the one or more pre-CG configurations;

if the one or more conditions to use the pre-CG resource are not fulfilled, determining whether the UE is allowed to perform the initial data transmission via a Random Access Channel (RACH) procedure in a current camping cell;

if the UE is allowed to perform the initial data transmission via the RACH procedure, performing the initial data transmission via the RACH procedure; and

if the UE is not allowed to perform the initial data transmission via the RACH procedure, performing a first transmission via an RRC connection Resume Procedure.

9. The BB processor of claim 3 , wherein the operations further comprise:

including a UE identifier (ID) in a medium access control (MAC) Protocol Data Units (PDU) for the initial data transmission;

monitoring a network feedback within a predefined time window after the initial data transmission using the pre-CG resource; and

determining whether the initial data transmission is successful.

10. The BB processor of claim 9 , wherein the UE ID is an radio network temporary identifier (RNTI).

11. The BB processor of claim 9 , wherein determination of a successful initial data transmission is based on receiving the network feedback comprising a radio network temporary identifier (RNTI) of the UE.

12. The BB processor of claim 9 , wherein a configured grant (CG) configuration of the one or more pre-CG configurations comprises a radio network temporary identifier (RNTI), and determination of the successful initial data transmission is based on receiving the network feedback comprising a downlink MAC PDU including the UE ID, which is scheduled using the RNTI of the CG configuration used for the initial data transmission.

13. The BB processor of claim 9 , wherein the operations further comprise: comprising:

determining the initial data transmission is unsuccessful when the UE does not receive the network feedback within the predefined time window.

14. The BB processor of claim 3 , wherein the operations further comprise:

monitoring a network feedback within a predefined time window after the initial data transmission using the pre-CG resource; and

determining the initial data transmission is successful when the UE receives the network feedback comprising a layer 1 acknowledgement (ACK) feedback, or a downlink control information (DCI) for uplink (UL) grant or downlink (DL) assignment with a corresponding radio network temporary identifier (RNTI) for the UE.

15. The BB processor of claim 3 , wherein the operations further comprise:

determining whether the UE has a valid timing advance (TA) to trigger the initial data transmission using the pre-CG resource, comprising:

determining that the UE has the valid TA when a UE mobility is limited since the UE enters the RRC_INACTIVE state, wherein the valid TA is a TA used in a previous RRC_CONNECTED state; and

determining that the UE has the valid TA when the current camping cell indicates the pre-CG resource is allowed, wherein a value of the valid TA equals to zero.

16. The BB processor of claim 3 , wherein each of the one or more pre-CG configurations comprises a configuration of the pre-CG resource and one or more conditions to use the pre-CG resource, and the operations further comprise:

determining whether the UE has data to be transmitted when the UE is in the RRC_INACTIVE state;

determining whether the one or more pre-CG configurations are configured and the one or more conditions to use the pre-CG resource are fulfilled;

if the one or more conditions to use the pre-CG resource are fulfilled, performing the initial data transmission using the one or more pre-CG configurations;

if the one or more conditions to use the pre-CG resource are not fulfilled, determining whether the UE is allowed to perform the initial data transmission via a Random Access Channel (RACH) procedure in a current camping cell;

if the UE is allowed to perform the initial data transmission via the RACH procedure, performing the initial data transmission via the RACH procedure; and

if the UE is not allowed to perform the initial data transmission via the RACH procedure, performing a first transmission via an RRC connection Resume Procedure.

17. The BB processor of claim 3 , wherein the operations further comprise:

determining whether the UE has a valid timing advance (TA) to trigger the initial data transmission using the pre-CG resource, comprising:

determining that the UE has the valid TA when a UE mobility is limited since the UE enters the RRC_INACTIVE state, wherein the valid TA is a TA used in a previous RRC connected (RRC_CONNECTED) state; and

determining that the UE has the valid TA when the current camping cell indicates the pre-CG resource is allowed, wherein a value of the valid TA equals to zero.

18. A method comprising:

receiving a dedicated radio resource control RRC message comprising one or more pre-configured grant (pre-CG) configurations for an RRC inactive (RRC_INACTIVE) state from a network node, wherein the one or more pre-CG configurations are for an initial data transmission when a UE is in the RRC_INACTIVE state;

entering the RRC_INACTIVE state;

receiving a broadcast message comprising an indication if a cell sending the broadcast message supports the initial data transmission using a pre-CG resource;

triggering the initial data transmission using the pre-CG resource to the cell based on the received one or more pre-CG configurations based on the indication in the broadcast message; and

performing, while the UE is in the RRC_INACTIVE state, the initial data transmission using a pre-CG resource based on the received one or more pre-CG configurations.

19. The method of claim 18 , wherein each of the one or more pre-CG configurations comprises a configuration of the pre-CG resource and one or more conditions to use the pre-CG resource.

20. The method of claim 18 , wherein a list of cells for which the one or more pre-CG configurations are valid, and the method further comprises:

the dedicated RRC message comprises

determining whether a current camping cell is included in the list of cells for which the one or more pre-CG configurations are valid; and

triggering the initial data transmission using the pre-CG resource to the current camping cell based on the determination.

21. The method of claim 18 , wherein each of the one or more pre-CG configurations comprises a configuration of the pre-CG resource and one or more conditions to use the pre-CG resource, and the method further comprising:

determining whether the UE has data to be transmitted when the UE is in the RRC_INACTIVE state;

determining whether the one or more pre-CG configurations are configured and the one or more conditions to use the pre-CG resource are fulfilled;

if the one or more conditions to use the pre-CG resource are fulfilled, performing the initial data transmission using the one or more pre-CG configurations;

if the one or more conditions to use the pre-CG resource are not fulfilled, determining whether the UE is allowed to perform the initial data transmission via a Random Access Channel (RACH) procedure in a current camping cell;

if the UE is allowed to perform the initial data transmission via the RACH procedure, performing the initial data transmission via the RACH procedure; and

if the UE is not allowed to perform the initial data transmission via the RACH procedure, performing a first transmission via an RRC connection Resume Procedure.

Assignments (1)

Continuity (1)

References Cited (15)