Granted Patent B2

US 12,273,201 · App. 17/904,547 · Granted Apr 8, 2025

Inventors: Sarma V. Vangala (Campbell, CA); Alexander Sirotkin (Hod Hasharon, IL); Dawei Zhang (Saratoga, CA); Fangli Xu (Beijing, CN); Haijing Hu (Los Gatos, CA); Naveen Kumar R. Palle Venkata (San Diego, CA); Pavan Nuggehalli (San Carlos, CA); Ralf Rossbach (Munich, DE); Sethuraman Gurumoorthy (San Ramon, CA); Yuqin Chen (Beijing, CN); Zhibin Wu (Los Altos, CA)

Assignee: Apple Inc.

H04L1/1635H04L47/323

Abstract

Claims (45)

1. A processor of a user equipment (UE) configured to perform operations comprising:

receiving a first cumulative acknowledgement (ACK) from a protocol stack of the UE at a first time;

storing the first cumulative ACK in a queue;

receiving a second cumulative ACK from the protocol stack at a second time, wherein the second time occurs after the first time;

storing the second cumulative ACK in the queue;

discarding the first cumulative ACK from the queue based on the second cumulative ACK being received after the first cumulative ACK; and

encapsulating the second cumulative ACK to form a radio link control (RLC) packet data unit (PDU) that is to be transmitted over the air.

2. The processor of claim 1 , wherein the first cumulative ACK and the second cumulative ACK correspond to a single transmission control protocol (TCP) flow.

3. The processor of claim 2 , the operations further comprising:

receiving a set of cumulative ACKs corresponding to a second different TCP flow, each cumulative ACK corresponding to the second different TCP flow is tagged with a same flow ID.

4. The processor of claim 3 , wherein within a timer duration only one cumulative ACK is encapsulated per flow ID.

5. The processor of claim 1 , wherein the protocol stack is a transmission control protocol (TCP) protocol stack and the processor is a modem.

6. The processor of claim 1 , the operations further comprising:

initiating a timer, wherein expiration of the timer is configured to trigger the discarding.

7. The processor of claim 1 , wherein contents of the second cumulative ACK are copied on a RLC header.

8. A user equipment (UE), comprising:

a transceiver configured to communicate with a network; and

a processor communicatively coupled to the transceiver and configured to perform operations comprising:

receiving a first cumulative acknowledgement (ACK) from a protocol stack of the UE at a first time;

storing the first cumulative ACK in a queue;

receiving a second cumulative ACK from the protocol stack at a second time, wherein the second time occurs after the first time;

storing the second cumulative ACK in the queue;

discarding the first cumulative ACK from the queue based on the second cumulative ACK being received after the first cumulative ACK; and

encapsulating the second cumulative ACK to form a radio link control (RLC) packet data unit (PDU) that is to be transmitted over the air.

9. The UE of claim 8 , wherein the first cumulative ACK and the second cumulative ACK correspond to a single transmission control protocol (TCP) flow.

10. The UE of claim 9 , the operations further comprising:

receiving a set of cumulative ACKs corresponding to a second different TCP flow, each cumulative ACK corresponding to the second different TCP flow is tagged with a same flow ID.

11. The UE of claim 10 , wherein within a timer duration only one cumulative ACK is encapsulated per flow ID.

12. The UE of claim 8 , wherein the protocol stack is a transmission control protocol (TCP) protocol stack and the processor is a modem.

13. The UE of claim 8 , the operations further comprising:

initiating a timer, wherein expiration of the timer is configured to trigger the discarding.

14. The UE of claim 8 , wherein contents of the second cumulative ACK are copied on a RLC header.

15. A processor of a user equipment (UE) configured to perform operations comprising:

identifying a first transmission control protocol (TCP) acknowledgement (ACK) at a TCP layer of the UE;

storing the first TCP ACK in a buffer, wherein a timer is initiated in response to the storing;

identifying a second TCP ACK from the TCP layer at a second time, wherein the second time occurs after a first time and prior to an expiration of the timer;

discarding the first TCP ACK from the buffer based on when the second TCP ACK was identified; and

encapsulating the second TCP ACK to form a radio link control (RLC) packet data unit (PDU) that is to be transmitted over the air.

16. The processor of claim 15 , wherein a duration of the timer is based on a downlink data rate.

17. The processor of claim 15 , wherein the first TCP ACK and the second TCP ACK correspond to a single TCP flow.

18. The processor of claim 17 , the operations further comprising:

identifying a third TCP ACK corresponding to a second different TCP flow, wherein each TCP flow is configured with a different buffer at the UE.

19. The processor of claim 17 , the operations further comprising:

identifying a third TCP ACK corresponding to a second different TCP flow, wherein each TCP flow is configured with a same buffer at the UE.

20. The processor of claim 15 , wherein within a timer duration only one cumulative ACK is encapsulated per TCP flow.

Assignments (1)

Continuity (1)

References Cited (17)