Transmission latency mitigation for voice over new radio (VoNR)

Patent metadata

Field	Value
Publication number	US-12219396-B2
Application number	US-202217945627-A
Country	US
Kind code	B2
Filing date	Sep 15, 2022
Priority date	Sep 15, 2022
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

Systems, methods, and apparatuses disclosed herein can mitigate transmitting latency to improve the quality of a voice or the video call. These systems, methods, and apparatuses reset a transmitting latency timer upon retrieving a packet from a transmitting buffer. Thereafter, these systems, methods, and apparatuses start the count of the transmitting latency timer as the packet is being processed. And these systems, methods, and apparatuses compare the transmitting latency timer e with a transmitting latency threshold as these systems, methods, and apparatuses are processing a packet for transmission. These systems, methods, and apparatuses can drop the packet and/or can select another packet for processing in response to the transmitting latency timer exceeding the transmitting latency threshold to mitigate the transmitting latency.

First claim

What is claimed is:

1. A first user equipment (UE), comprising:
a transceiver configured to transmit a first packet that is retrieved from a transmitting buffer to a second UE; and
a processor, coupled to the transceiver, configured to:
reset a transmitting latency timer in response to the transceiver transmitting the first packet to the second UE,
start the transmitting latency timer as a second packet retrieved from the transmitting buffer starts being processed by the first UE for transmission to the second UE,
compare a count of the transmitting latency timer with a transmitting latency threshold during processing of the second packet by the first UE, and
in response to the count of the transmitting latency timer exceeding the transmitting latency threshold,
cease the processing of the second packet by the first UE, and
retrieve a third packet from the transmitting buffer for processing by the first UE.

2. The first UE of claim 1 , wherein the first packet, the second packet, and the third packet comprise a first Real-time Transport Protocol (RTP) packet, a second RTP packet, and a third RTP packet, respectively, that are associated with a voice call or a video call between the first UE and the second UE.

3. The first UE of claim 1 , wherein the processor is further configured to transmit, using the transceiver, the second packet to the second UE in response to the processing of the second packet by the first UE being completed before the count of the transmitting latency timer exceeds the transmitting latency threshold.

4. The first UE of claim 1 , wherein the processing by the first UE comprises:
Packet Data Convergence Protocol (PDCP) and radio link control (RLC), multiple access control (MAC) processing performed by the processor; and
physical (PHY) layer processing performed by the transceiver.

5. The first UE of claim 1 , wherein the count of the transmitting latency timer is configured to measure time consumed by the first UE to prepare the second packet for transmission to the second UE.

6. The first UE of claim 1 , wherein the transmitting latency threshold comprises:
a predetermined static threshold that is based on analysis of a channel latency of a wireless channel between the first UE and the second UE and a transmitting latency of the first UE.

7. The first UE of claim 1 , wherein the transmitting latency threshold comprises:
a dynamic configurable threshold that reflects changes in a channel latency of a wireless channel between the first UE and the second UE or a transmitting latency of the first UE.

8. The first UE of claim 7 , wherein the processor is further configured to:
decrease the dynamic configurable threshold in response to the channel latency increasing; and
increase the dynamic configurable threshold in response to the channel latency decreasing.

9. A method performed by a first user equipment (UE), the method comprising:
transmitting a first packet that is retrieved from a transmitting buffer to a second UE;
resetting a transmitting latency timer in response to a transceiver transmitting the first packet to the second UE;
starting the transmitting latency timer as a second packet retrieved from the transmitting buffer starts being processed by the first UE for transmission to the second UE;
comparing a count of the transmitting latency timer with a transmitting latency threshold during processing of the second packet by the first UE; and
in response to the count of the transmitting latency timer exceeding the transmitting latency threshold, ceasing the processing of the second packet by the first UE, and
retrieving a third packet from the transmitting buffer for processing by the first UE.

10. The method of claim 9 , wherein the first packet, the second packet, and the third packet comprise a first Real-time Transport Protocol (RTP) packet, a second RTP packet, and a third RTP packet, respectively, that are associated with a voice call or a video call between the first UE and the second UE.

11. The method of claim 9 , further comprising transmitting the second packet to the second UE in response to the processing of the second packet by the first UE being completed before the count of the transmitting latency timer exceeds the transmitting latency threshold.

12. The method of claim 9 , wherein the processing by the first UE comprises:
Packet Data Convergence Protocol (PDCP) and radio link control (RLC), multiple access control (MAC) processing; and
physical (PHY) layer processing.

13. The method of claim 9 , wherein the count of the transmitting latency timer measures time consumed by the first UE to prepare the second packet for transmission to the second UE.

14. The method of claim 9 , wherein the transmitting latency threshold comprises a predetermined static threshold that is based on analysis of a channel latency of a wireless channel between the first UE and the second UE and a transmitting latency of the first UE.

15. The method of claim 9 , wherein the transmitting latency threshold comprises a dynamic configurable threshold that reflects changes in a channel latency of a wireless channel between the first UE and the second UE or a transmitting latency of the first UE.

16. The method of claim 15 , further comprising:
decreasing the dynamic configurable threshold in response to the channel latency increasing; and
increasing the dynamic configurable threshold in response to the channel latency decreasing.

17. A first user equipment (UE), comprising:
a memory that stores a plurality of Real-time Transport Protocol (RTP) packets that are associated with a voice call or a video call between the first UE and a second UE; and
a processor configured to execute instructions stored in the memory, the instructions, when executed by the processor, configuring the processor to:
reset a transmitting latency timer in response to the first UE transmitting a first RTP packet from among the plurality of RTP packets to the second UE,
start the transmitting latency timer as a second RTP packet from among the plurality of RTP packets starts being processed by the first UE for transmission to the second UE,
compare a count of the transmitting latency timer with a transmitting latency threshold during processing of the second RTP packet by the first UE, and
cease the processing of the second RTP packet by the first UE in response to the count of the transmitting latency timer exceeding the transmitting latency threshold.

18. The first UE of claim 17 , wherein the instructions, when executed by the processor, further configure the processor to retrieve a third packet for processing by the first UE.

19. The first UE of claim 17 , wherein the transmitting latency threshold comprises a predetermined static threshold that is based on analysis of a channel latency of a wireless channel between the first UE and the second UE and a transmitting latency of the first UE.

20. The first UE of claim 17 , wherein the transmitting latency threshold comprises a dynamic configurable threshold that reflects changes in a channel latency or a transmitting latency.

Assignees

• Apple Inc

Inventors

• Zhang Kai
• Cui Lele
• Bhattacharjee Deepankar

Classifications

• H04L47/263 Primary

  Rate modification at the source after receiving feedback · CPC title

• H04L47/32

  by discarding or delaying data units, e.g. packets or frames · CPC title

• H04L47/283

  in response to processing delays, e.g. caused by jitter or round trip time [RTT] · CPC title

• H04W28/0975 Primary

  for reducing delays · CPC title