Reduction of latency in wireless communication systems

Patent metadata

Field	Value
Publication number	US-12477567-B2
Application number	US-202118011413-A
Country	US
Kind code	B2
Filing date	Dec 22, 2021
Priority date	Dec 22, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

Disclosed are methods, systems, and computer-readable medium to perform operations including: receiving, from an application layer of a user equipment (UE), a first uplink packet at a first time; identifying a latency between the first time and a first instance of a periodic transmission resource during which the first uplink packet is transmitted by the UE; and providing information indicative of the latency to the application layer of the UE.

First claim

We claim:

1 . A method comprising:
receiving, from an application layer of a user equipment (UE), a first uplink packet at a first time; identifying a latency between the first time and a first instance of a periodic transmission resource during which the first uplink packet is transmitted by the UE; and providing information indicative of the latency to the application layer of the UE.

2 . The method of claim 1 , wherein the latency is a first latency, and wherein the method further comprises:
receiving, from the application layer, a second uplink packet at a second time, wherein a second latency between the second time and a second instance of the periodic transmission resource is smaller than the first latency.

3 . The method of claim 1 , wherein the information indicative of the latency comprises a value of the latency in milliseconds.

4 . The method of claim 1 , wherein the information indicative of the latency comprises an instruction to adjust a packet sampling time by the application layer.

5 . The method of claim 1 , further comprising:
receiving, at a second time, a first configured grant (CG) that schedules the first instance of the periodic transmission resource, wherein the second time occurs after the first time.

6 . The method of claim 5 , further comprising:
receiving, at a third time, a second CG that schedules a second instance of the periodic transmission resource; receiving, from the application layer, a second uplink packet at a fourth time that occurs after the third time; and preparing the second uplink packet for transmission using the second instance of the periodic transmission resource.

7 . The method of claim 1 , wherein the UE is operating in a cellular vehicle-to-everything (V2X) network, and wherein the method further comprises:
selecting, for the periodic transmission resource, one or more time-frequency resources within a resource selection window.

8 . The method of claim 1 , further comprising:
receiving connected mode discontinuous reception (CDRX) configuration information that defines a periodic CDRX ON duration; and receiving the first uplink packet between a first instance of the periodic CDRX ON duration and a second instance of the periodic CDRX ON duration.

9 . The method of claim 8 , further comprising:
receiving, during the second instance of the periodic CDRX ON duration, an uplink grant that schedules the first instance of the periodic transmission resource, wherein a second instance of the periodic transmission resource occurs during the first instance of the CDRX ON period.

10 . The method of claim 1 , wherein the periodic transmission resource is scheduled within a Physical Uplink Shared Channel (PUSCH).

11 . A user equipment (UE) comprising:
one or more processors configured to perform operations comprising:
receiving, from an application layer, a first uplink packet at a first time;
identifying a latency between the first time and a first instance of a periodic transmission resource during which the first uplink packet is transmitted by the UE; and
providing information indicative of the latency to the application layer of the UE.

12 . The UE of claim 11 , wherein the latency is a first latency, and wherein the operations further comprise:
receiving, from the application layer, a second uplink packet at a second time, wherein a second latency between the second time and a second instance of the periodic transmission resource is smaller than the first latency.

13 . The UE of claim 11 , wherein the information indicative of the latency comprises a value of the latency in milliseconds.

14 . The UE of claim 11 , wherein the information indicative of the latency comprises an instruction to adjust a packet sampling time by the application layer.

15 . The UE of claim 11 , the operations further comprising:
receiving, at a second time, a first configured grant (CG) that schedules the first instance of the periodic transmission resource, wherein the second time occurs after the first time.

16 . The UE of claim 15 , the operations further comprising:
receiving, at a third time, a second CG that schedules a second instance of the periodic transmission resource; receiving, from the application layer, a second uplink packet at a fourth time that occurs after the third time; and preparing the second uplink packet for transmission using the second instance of the periodic transmission resource.

17 . The UE of claim 11 , wherein the UE is operating in a cellular vehicle-to-everything (V2X) network, and wherein the operations further comprise:
selecting, for the periodic transmission resource, one or more time-frequency resources within a resource selection window.

18 . The UE of claim 11 , the operations further comprising:
receiving connected mode discontinuous reception (CDRX) configuration information that defines a periodic CDRX ON duration; and receiving the first uplink packet between a first instance of the periodic CDRX ON duration and a second instance of the periodic CDRX ON duration.

19 . The UE of claim 18 , the operations further comprising
receiving, during the second instance of the periodic CDRX ON duration, an uplink grant that schedules the first instance of the periodic transmission resource, wherein a second instance of the periodic transmission resource occurs during the first instance of the CDRX ON period.

20 . A non-transitory computer-readable storage device having stored thereon instructions, which, when executed by a data processing apparatus, cause the data processing apparatus to perform operations comprising:
receiving, from an application layer of a user equipment (UE), a first uplink packet at a first time; identifying a latency between the first time and a first instance of a periodic transmission resource during which the first uplink packet is transmitted by the UE; and providing information indicative of the latency to the application layer of the UE.

Assignees

• Apple Inc

Inventors

• Zhang Lijie
• Miao Qiang
• Wang Zhiwei

Classifications

• H04W72/1268

  of uplink data flows · CPC title

• H04W28/0236

  radio quality, e.g. interference, losses or delay · CPC title

• H04W72/1263

  Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows · CPC title

• H04W76/28

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title