IP Library › Granted Patent US 12695557
Granted Patent B2
US 12695557 · App. 18/447,779 · Granted Jul 28, 2026

Full-duplex operations for user equipments

Inventors: Ahmed Attia Abotabl (San Diego, CA); Muhammad Sayed Khairy Abdelghaffar (San Jose, CA); Abdelrahman Mohamed Ahmed Mohamed Ibrahim (San Diego, CA); Dai Lu (San Diego, CA); Krishna Kiran Mukkavilli (San Diego, CA)
Assignee: QUALCOMM Incorporated
H04L5/001H04L5/14H04L27/2605
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Quick Facts
Patent No.
US 12695557
App. No.
18/447,779
Granted
Jul 28, 2026
Kind
B2
Abstract

Methods, systems, and devices for wireless communications are described. The described techniques may allow for a user equipment (UE) to communicate with a network entity using full-duplex communication techniques. For example, the UE may transmit, to the network entity, an indication of respective quantities of transmit chains and receive chains at the UE supports for full-duplex and half-duplex communications. In some cases, the UE may identify one or more fixed subbands within a component carrier (CC) or one or more fixed CCs that are allocated for uplink transmissions, and the UE may identify one or more guard bands between the fixed uplink subbands or uplink CCs and one or more downlink subbands or downlink CCs, respectively. In some examples, the UE may identify a guard interval between half-duplex resources and full-duplex resources to allow time for the UE to switch between the half-duplex resources and the full-duplex resources.

Claims (44)

1 . A user equipment (UE) for wireless communications, comprising:

one or more memories storing processor-executable code; and

one or more processors coupled with the one or more memories and individually or collectively operable to cause the UE to:

transmit, to a network entity, a capability message comprising an indication of a guard band configuration that is based at least in part on one or more capabilities of the UE;

identify a configuration of one or more fixed component carriers that are reserved for uplink transmissions by the UE, wherein the uplink transmissions are associated with the UE operating using a full-duplex communication mode; and

transmit, via the one or more fixed component carriers and while simultaneously receiving at least a portion of one or more downlink messages via one or more other component carriers, one or more uplink messages based at least in part on operating using the full-duplex communication mode and in accordance with the configuration, wherein a guard band between the one or more fixed component carriers and the one or more other component carriers is based at least in part on the guard band configuration.

2 . The UE of claim 1 , wherein the one or more processors are individually or collectively operable to execute the code to cause the UE to:

identify the guard band configuration that indicates a size of a first guard band between each of the one or more fixed component carriers and the one or more other component carriers.

3 . The UE of claim 2 , wherein the guard band configuration is based at least in part on one or more preconfigured guard band configurations.

4 . The UE of claim 2 , wherein the one or more processors are individually or collectively operable to execute the code to cause the UE to:

refrain from transmitting uplink messages via the one or more other component carriers based at least in part on the one or more fixed component carriers and the size of the first guard band; and

refrain from receiving downlink messages via the one or more fixed component carriers based at least in part on the one or more fixed component carriers and the size of the first guard band.

5 . The UE of claim 1 , wherein the one or more processors are individually or collectively operable to execute the code to cause the UE to:

select a first fixed component carrier from the one or more fixed component carriers based at least in part on one or more additional capabilities of the UE, wherein transmitting the one or more uplink messages comprises transmitting the one or more uplink messages via the first fixed component carrier.

6 . The UE of claim 1 , wherein the one or more fixed component carriers are each defined by a preconfigured central frequency and a preconfigured bandwidth.

7 . A method for wireless communications at a user equipment (UE), comprising:

transmitting, to a network entity, a capability message comprising an indication of a guard band configuration that is based at least in part on one or more capabilities of the UE;

identifying a configuration of one or more fixed component carriers that are reserved for uplink transmissions by the UE, wherein the uplink transmissions are associated with the UE operating using a full-duplex communication mode; and

transmitting, via the one or more fixed component carriers and while simultaneously receiving at least a portion of one or more downlink messages via one or more other component carriers, one or more uplink messages based at least in part on operating using the full-duplex communication mode and in accordance with the configuration, wherein a guard band between the one or more fixed component carriers and the one or more other component carriers is based at least in part on the guard band configuration.

8 . The method of claim 7 , further comprising:

identifying the guard band configuration that indicates a size of a first guard band between each of the one or more fixed component carriers and the one or more other component carriers.

9 . The method of claim 8 , wherein the guard band configuration is identified based at least in part on one or more preconfigured guard band configurations.

10 . The method of claim 8 , further comprising:

refraining from transmitting uplink messages via the one or more other component carriers based at least in part on the one or more fixed component carriers and the size of the first guard band; and

refraining from receiving downlink messages via the one or more fixed component carriers based at least in part on the one or more fixed component carriers and the size of the first guard band.

11 . The method of claim 7 , wherein the one or more fixed component carriers are each defined by a preconfigured central frequency and a preconfigured bandwidth.

12 . The method of claim 7 , further comprising:

selecting a first fixed component carrier from the one or more fixed component carriers based at least in part on one or more additional capabilities of the UE, wherein transmitting the one or more uplink messages comprises transmitting the one or more uplink messages via the first fixed component carrier.

13 . A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by one or more processors to:

transmit, to a network entity, a capability message comprising an indication of a guard band configuration that is based at least in part on one or more capabilities of a user equipment (UE);

identify a configuration of one or more fixed component carriers that are reserved for uplink transmissions by the UE, wherein the uplink transmissions are associated with the UE operating using a full-duplex communication mode; and

transmit, via the one or more fixed component carriers and while simultaneously receiving at least a portion of one or more downlink messages via one or more other component carriers, one or more uplink messages based at least in part on operating using the full-duplex communication mode and in accordance with the configuration, wherein a guard band between the one or more fixed component carriers and the one or more other component carriers is based at least in part on the guard band configuration.

14 . The non-transitory computer-readable medium of claim 13 , wherein the instructions are further executable by the one or more processors to:

identify the guard band configuration that indicates a size of a first guard band between each of the one or more fixed component carriers and the one or more other component carriers.

15 . The non-transitory computer-readable medium of claim 14 , wherein the guard band configuration is based at least in part on one or more preconfigured guard band configurations.

16 . The non-transitory computer-readable medium of claim 14 , wherein the instructions are further executable by the one or more processors to:

refrain from transmitting uplink messages via the one or more other component carriers based at least in part on the one or more fixed component carriers and the size of the first guard band; and

refrain from receiving downlink messages via the one or more fixed component carriers based at least in part on the one or more fixed component carriers and the size of the first guard band.

17 . The non-transitory computer-readable medium of claim 13 , wherein the instructions are further executable by the one or more processors to:

select a first fixed component carrier from the one or more fixed component carriers based at least in part on one or more additional capabilities of the UE, wherein transmitting the one or more uplink messages comprises transmitting the one or more uplink messages via the first fixed component carrier.

18 . A user equipment (UE) for wireless communication, comprising:

means for transmitting, to a network entity, a capability message comprising an indication of a guard band configuration that is based at least in part on one or more capabilities of the UE;

means for identifying a configuration of one or more fixed component carriers that are reserved for uplink transmissions by the UE, wherein the uplink transmissions are associated with the UE operating using a full-duplex communication mode; and

means for transmitting, via the one or more fixed component carriers and while simultaneously receiving at least a portion of one or more downlink messages via one or more other component carriers, one or more uplink messages based at least in part on operating using the full-duplex communication mode and in accordance with the configuration, wherein a guard band between the one or more fixed component carriers and the one or more other component carriers is based at least in part on the guard band configuration.