Granted Patent B2

US 12,477,573 · App. 17/593,754 · Granted Nov 18, 2025

Inventors: Oghenekome Oteri (San Diego, CA); Weidong Yang (San Diego, CA); Sigen Ye (Whitehouse Station, NJ); Haitong Sun (Cupertino, CA); Chunhai Yao (Beijing, CN); Yushu Zhang (Beijing, CN); Dawei Zhang (Saratoga, CA); Chunxuan Ye (San Diego, CA); Wei Zeng (Saratoga, CA); Hong He (San Jose, CA)

Assignee: Apple Inc.

H04W74/04H04W74/0808H04W74/0816H04W74/0875

Abstract

Claims (51)

1 . A method performed by a second user device for communications in a wireless system, comprising:

transmitting, to a node, unlicensed frequency transmission capability information;

receiving, from the node, an uplink transmission time for the second user device based on the unlicensed frequency transmission capability;

receiving, from the node, a request to transmit a reservation transmission to occupy an unlicensed frequency band based on a cancellation time capability of a first user device and the uplink transmission time;

transmitting the reservation transmission to occupy the unlicensed frequency band, wherein the reservation transmission begins at the beginning of a cancellation time window of the first user device based on the cancellation time capability and ends at the beginning of a maximum contention time window; and

transmitting, to the node, an uplink transmission in the unlicensed frequency band at the uplink transmission time.

2 . The method of claim 1 , further comprising:

receiving, from the node, an indication to sense the unlicensed frequency band to determine whether the unlicensed frequency band is in use before transmitting the uplink transmission; and

sensing the unlicensed frequency band to determine that the unlicensed frequency band is not in use before transmitting the uplink transmission.

3 . The method of claim 1 , further comprising:

receiving an indication of the maximum contention window size from the node, wherein the uplink transmission time for the second user device is based on an end of the maximum contention window; and

listening on the unlicensed frequency band during the maximum contention window to determine that the unlicensed frequency band is idle.

4 . The method of claim 1 , wherein the uplink transmission time comprises an indication of a start time and duration of the uplink transmission.

5 . The method of claim 1 , wherein the reservation transmission comprises an extended cyclic prefix.

6 . The method of claim 1 , wherein the reservation transmission comprises one or more portions of a start and length indicator table.

7 . The method of claim 1 , wherein the reservation transmission comprises an encoded indication of a listen before talk type.

8 . The method of claim 1 , further comprising receiving an indication of contents of the reservation transmission.

9 . A wireless device comprising:

an antenna;

a radio operably coupled to the antenna; and

a processor operably coupled to the radio;

wherein the wireless device is configured to:

transmit to a node unlicensed frequency transmission capability information;

receive from the node an uplink transmission time for the wireless device based on the unlicensed frequency transmission capability;

receive from the node a request to transmit a reservation transmission to occupy an unlicensed frequency band based on a cancellation time capability of a first user device and the uplink transmission time;

transmit the reservation transmission to occupy the unlicensed frequency band, wherein the reservation transmission begins at the beginning of a cancellation time window of the first user device based on the cancellation time capability and ends at the beginning of a maximum contention time window; and

transmit to the node a uplink transmission in the unlicensed frequency band at the uplink transmission time.

10 . The wireless device of claim 9 , wherein the wireless device is further configured to:

receive from the node an indication to sense the unlicensed frequency band to determine whether the unlicensed frequency band is in use before transmitting the uplink transmission; and

sense the unlicensed frequency band to determine that the unlicensed frequency band is not in use before transmitting the uplink transmission.

11 . The wireless device of claim 9 , wherein the wireless device is further configured to:

receive an indication of the maximum contention window size from the node, wherein the uplink transmission time for the second user device is based on an end of the maximum contention window; and

listen on the unlicensed frequency band during the maximum contention window to determine that the unlicensed frequency band is idle.

12 . The wireless device of claim 9 , wherein the uplink transmission time comprises an indication of a start time and duration of the uplink transmission.

13 . The wireless device of claim 9 , wherein the request to transmit the reservation transmission comprises an indication of a start time and duration of the reservation transmission.

14 . The wireless device of claim 9 , wherein the reservation transmission comprises an extended cyclic prefix.

15 . The wireless device of claim 9 , wherein the reservation transmission comprises one or more portions of a start and length indicator table.

16 . The wireless device of claim 9 , wherein the reservation transmission comprises an encoded indication of a listen before talk type.

17 . The wireless device of claim 9 , wherein the wireless device is further configured to receive an indication of contents of the reservation transmission.

18 . An integrated circuit, comprising circuitry configured to cause a wireless device to:

transmit, to a node, unlicensed frequency transmission capability information;

receive, from the node, an uplink transmission time for the second user device based on the unlicensed frequency transmission capability;

receive, from the node, a request to transmit a reservation transmission to occupy an unlicensed frequency band based on a cancellation time capability of a first user device and the uplink transmission time;

transmit the reservation transmission to occupy the unlicensed frequency band, wherein the reservation transmission begins at the beginning of a cancellation time window of the first user device based on the cancellation time capability and ends at the beginning of a maximum contention time window; and

transmit, to the node, a uplink transmission in the unlicensed frequency band at the uplink transmission time.

19 . The circuit of claim 18 , wherein the circuitry is further configured to:

receive, from the node an indication to sense the unlicensed frequency band to determine whether the unlicensed frequency band is in use before transmitting the uplink transmission; and

sense the unlicensed frequency band to determine that the unlicensed frequency band is not in use before transmitting the uplink transmission.

20 . The circuit of claim 18 , wherein the circuitry is further configured to:

receive, by the wireless device from the node, an indication of the maximum contention window size from the node, wherein the uplink transmission time for the second user device is based on an end of the maximum contention window; and

listen on the unlicensed frequency band during the maximum contention window to determine that the unlicensed frequency band is idle.

Assignments (1)

Continuity (1)

References Cited (26)