Granted Patent B2

US 12,302,440 · App. 17/427,167 · Granted May 13, 2025

Inventors: Bharat Shrestha (Cupertino, CA); Seau S. Lim (Cupertino, CA); Marta Martinez Tarradell (Cupertino, CA)

Assignee: Apple Inc.

H04W76/27H04L1/1812H04L1/188H04L5/0055H04W76/34

Abstract

Claims (68)

1. A method, comprising:

establishing a first preconfigured uplink resource (PUR) and a second PUR for use by a user equipment (UE) in IDLE mode, wherein the first PUR uses a first hybrid automatic repeat request (HARQ) process;

transmitting uplink data using the first PUR while in IDLE mode using the first HARQ process;

starting a PUR retransmission timer;

monitoring a control channel for an acknowledgement message prior to an expiration of the PUR retransmission timer;

identifying the expiration of the PUR retransmission timer prior to receiving the acknowledgement message;

in response to the identifying, determining that the first HARQ process has failed; and

in response to the determining, starting a second HARQ process to retransmit the uplink data using the second PUR, wherein the second HARQ process is different from the first HARQ process.

2. The method of claim 1 , wherein the acknowledgment message is a Radio Resource Control (RRC) message.

3. The method of claim 1 , further comprising:

in response to the retransmitting, receiving a Radio Resource Control (RRC) message directing the UE to remain in IDLE mode; and

maintaining the UE in IDLE mode.

4. The method of claim 1 , further comprising:

in response to the retransmitting, receiving a Radio Resource Control (RRC) message directing the UE to move to a CONNECTED mode; and

changing a status of the UE from IDLE to CONNECTED.

5. The method of claim 1 , further comprising:

in response to the retransmitting, receiving a contention resolution Medium Access Control Control Element (MAC CE) as an acknowledgement; and

maintaining the UE in IDLE mode.

6. The method of claim 1 , further comprising:

in response to the retransmitting, receiving a negative acknowledgment (NACK); and

retransmitting the uplink data using an early data transmission (EDT) protocol.

7. The method of claim 1 , further comprising:

in response to the retransmitting, transmitting a Radio Resource Control (RRC) message to release the second PUR.

8. An apparatus, comprising:

radio front end circuitry; and

processing circuitry coupled to the radio front end circuitry, wherein the processing circuitry is configured to:

establish a first preconfigured uplink resource (PUR) and a second PUR for use by the apparatus in IDLE mode, wherein the first PUR uses a first hybrid automatic repeat request (HARQ) process;

transmit, using the radio front end circuitry, uplink data using the first PUR while in IDLE mode using the first HARQ process;

start a PUR retransmission timer;

monitor a control channel for an acknowledgement message prior to an expiration of the PUR retransmission timer;

identify the expiration of the PUR retransmission timer prior to receiving the acknowledgement message;

in response to the identifying, determine that the first HARQ process has failed; and

in response to the determining, start a second HARQ process to retransmit the uplink data using the second PUR, wherein the second HARQ process is different from the first HARQ process.

9. The apparatus of claim 8 , wherein the acknowledgment message is a Radio Resource Control (RRC) message.

10. The apparatus of claim 8 , wherein the processing circuitry is further configured to:

in response to the retransmitting, receive a Radio Resource Control (RRC) message directing the apparatus to remain in IDLE mode; and

maintain the apparatus in IDLE mode.

11. The apparatus of claim 8 , wherein processing circuitry is further configured to:

in response to the retransmitting, receive a Radio Resource Control (RRC) message directing the apparatus to move to a CONNECTED mode; and

change a status of the apparatus from IDLE to CONNECTED.

12. The apparatus of claim 8 , wherein processing circuitry is further configured to:

in response to the retransmitting, receive a contention resolution Medium Access Control Control Element (MAC CE) as an acknowledgement; and

maintain the apparatus in IDLE mode.

13. The apparatus of claim 8 , wherein processing circuitry is further configured to:

in response to the retransmitting, receive a negative acknowledgment (NACK); and

retransmit the uplink data using an early data transmission (EDT) protocol.

14. The apparatus of claim 8 , wherein processing circuitry is further configured to:

in response to the retransmitting, transmitting a Radio Resource Control (RRC) message to release the second PUR.

15. A method, comprising:

establishing a first hybrid automatic repeat request (HARQ) process corresponding to a first preconfigured uplink resource (PUR) and a second HARQ process corresponding to a second PUR for use by a user equipment (UE) in IDLE mode, wherein the second HARQ process is different from the first HARQ process;

transmitting uplink data using the first HARQ process and the first PUR while in IDLE mode;

starting a PUR retransmission timer;

monitoring a control channel for an acknowledgement message prior to an expiration of the PUR retransmission timer;

identifying the expiration of the PUR retransmission timer prior to receiving the acknowledgement message;

in response to the identifying, determining that the first HARQ process has failed; and

in response to the determining, retransmitting the uplink data using the second HARQ process and the second PUR.

16. The method of claim 15 , wherein the acknowledgment message is a Radio Resource Control (RRC) message.

17. The method of claim 15 , further comprising:

in response to the retransmitting, receiving a Radio Resource Control (RRC) message directing the UE to remain in IDLE mode; and

maintaining the UE in IDLE mode.

18. The method of claim 15 , further comprising:

in response to the retransmitting, receiving a Radio Resource Control (RRC) message directing the UE to move to a CONNECTED mode; and

changing a status of the UE from IDLE to CONNECTED.

19. The method of claim 15 , further comprising:

in response to the retransmitting, receiving a negative acknowledgment (NACK); and

retransmitting the uplink data using an early data transmission (EDT) protocol.

20. The method of claim 15 , further comprising:

in response to the retransmitting, transmitting a Radio Resource Control (RRC) message to release the second PUR.

Assignments (2)

Continuity (2)

References Cited (50)

Cited By (2)

US 12,432,761 US 12,659,914