CN-122003833-A - Techniques for user equipment full duplex operation

Abstract

Methods, systems, and devices for wireless communications are described that provide full duplex communications at both a User Equipment (UE) and a serving network entity, wherein the UE, the network entity, or both may dynamically change from full duplex communications to half duplex communications. The UE may be configured for full duplex communication for a set of symbols and may receive an indication to switch one or more symbols to a half duplex configuration. The half-duplex configuration may correspond to the indicated half-duplex configuration in which both the network entity and the UE operate in the half-duplex configuration, or may correspond to a full-duplex configuration in which the UE operates in half-duplex and the network operates in the full-duplex configuration. The signaling indicating that one or more symbols are to be switched to the half-duplex configuration may be provided in downlink control information, medium access control signaling, or both.

Inventors

• Q.ZHANG
• ZHOU YAN

Assignees

• 高通股份有限公司

Dates

Publication Date

20260508

Application Date

20240924

Priority Date

20231024

Claims (20)

1. 1. A User Equipment (UE), the UE comprising: One or more of the memories may be provided, the one or more memories store processor executable code; and One or more processors coupled with the one or more memories and operable, individually or collectively, to execute the code to cause the UE to: Receiving a network full duplex configuration, the network full duplex configuration indicating that a set of symbols is configured for full duplex communication at a network entity; Receiving a UE full duplex configuration indicating that at least a subset of the set of symbols has a first configuration for full duplex communication at the UE, the subset of symbols including some or all of the symbols in the set of symbols; Receiving an indication that at least a first symbol of the subset of symbols has a second configuration different from the first configuration of the first symbol, and And communicating with the network entity according to the second configuration of the first symbol.
2. 2. The UE of claim 1, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: A half-duplex symbol format indication is received, the half-duplex symbol format indication indicating an uplink format, a downlink format, or a flexible format for each symbol in the set of symbols, wherein the first symbol has the downlink format in the half-duplex symbol format indication, and wherein the network full-duplex configuration updates the half-duplex symbol format indication of the set of symbols for full-duplex communication at the network entity, and the UE full-duplex configuration corresponds to the network full-duplex configuration of the subset of symbols for full-duplex communication at the UE.
3. 3. The UE of claim 2, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have the downlink format, wherein both the network entity and the UE communicate using half duplex communication for the first symbol.
4. 4. The UE of claim 2, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have the network full duplex configuration indicated for the first symbol, wherein the network entity communicates using full duplex communication for the first symbol and the UE communicates using half duplex communication for the first symbol in accordance with the network full duplex configuration.
5. 5. The UE of claim 1, wherein the network full duplex configuration is a sub-band full duplex configuration in which at least a first sub-band of component carrier bandwidth is configured for downlink communication and at least a second sub-band or another component carrier of the component carrier bandwidth is configured for uplink communication.
6. 6. The UE of claim 1, wherein the UE full duplex configuration is a sub-band full duplex configuration in which at least a first sub-band of component carrier bandwidth is configured for downlink communication and at least a second sub-band or another component carrier of the component carrier bandwidth is configured for uplink communication.
7. 7. The UE of claim 1, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: A UE capability message is sent indicating that the UE is capable of performing full duplex communication at the UE and indicating that the UE is capable of updating the UE full duplex configuration of one or more symbols to fall back to the network full duplex configuration or to a half duplex symbol format configuration associated with the set of symbols.
8. 8. The UE of claim 1, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: A half-duplex symbol format indication is received indicating an uplink format, a downlink format, or a flexible format for each symbol in the set of symbols, wherein the first symbol has the flexible format in the half-duplex symbol format indication and the first symbol has a downlink and uplink network full-duplex configuration, and wherein the network full-duplex configuration updates a half-duplex symbol format of the set of symbols for full-duplex communication at the network entity and the UE full-duplex configuration corresponds to the network full-duplex configuration of the subset of symbols for full-duplex communication at the UE.
9. 9. The UE of claim 8, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have the downlink format, wherein both the network entity and the UE communicate using half duplex communication for the first symbol.
10. 10. The UE of claim 8, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have the flexible format, wherein both the network entity and the UE communicate using half duplex communication for the first symbol.
11. 11. The UE of claim 8, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have the network full duplex configuration indicated for the first symbol, wherein the network entity communicates using full duplex communication for the first symbol and the UE communicates using half duplex communication for the first symbol in accordance with the downlink format or the flexible format.
12. 12. The UE of claim 1, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: Receiving a half-duplex symbol format indication indicating an uplink format, a downlink format, or a flexible format for each symbol in the set of symbols, wherein the first symbol has the flexible format in the half-duplex symbol format indication, and wherein the network full-duplex configuration updates the half-duplex symbol format indication of the set of symbols for sub-band full-duplex communication at the network entity to provide the first symbol with a flexible and uplink network sub-band full-duplex configuration, and the UE full-duplex configuration corresponds to the network full-duplex configuration for the subset of symbols for sub-band full-duplex communication at the UE.
13. 13. The UE of claim 12, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have the flexible format, wherein both the network entity and the UE communicate using half duplex communication for the first symbol.
14. 14. The UE of claim 12, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have a flexible and uplink sub-band full duplex configuration, wherein the flexible and uplink sub-band full duplex configuration provides an uplink sub-band and one or more flexible sub-bands outside the uplink sub-band within at least one carrier bandwidth, and wherein the network entity communicates using full duplex communication for the first symbol and the UE communicates using half duplex communication for the first symbol in accordance with the flexible format.
15. 15. The UE of claim 12, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have a downlink and uplink sub-band full duplex configuration, wherein the downlink and uplink sub-band full duplex configuration provides uplink sub-bands and one or more downlink sub-bands within at least one carrier bandwidth, and wherein the network entity communicates using full duplex communication for the first symbol and the UE communicates using half duplex communication for the first symbol in accordance with the downlink format.
16. 16. The UE of claim 12, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have the uplink format, wherein both the network entity and the UE communicate using half duplex communication for the first symbol.
17. 17. The UE of claim 12, wherein the one or more processors are further operable, individually or collectively, to execute the code to cause the UE to: In response to the indication that the first symbol has the second configuration, the first symbol is updated to have the downlink format, wherein both the network entity and the UE communicate using half duplex communication for the first symbol.
18. 18. The UE of claim 1, wherein to receive the indication, the one or more processors are operable individually or collectively to execute the code to cause the UE to: A method includes receiving a scheduled Downlink Control Information (DCI) communication scheduling downlink or uplink communications outside of a subband configured for downlink or uplink communications in the UE full duplex configuration of at least the first symbol.
19. 19. The UE of claim 1, wherein to receive the indication, the one or more processors are operable individually or collectively to execute the code to cause the UE to: a Medium Access Control (MAC) Control Element (CE) is received that indicates whether the first symbol is to be used for UE full duplex communication or for UE half duplex communication.
20. 20. The UE of claim 1, wherein the indication that at least the first symbol of the subset of symbols has the second configuration provides one or more of a change in periodic mode of the UE full duplex configuration of the subset of symbols, an updated semi-persistent UE full duplex configuration of the subset of symbols, or maintaining the second configuration until a subsequent update to the UE full duplex configuration.

Description

Techniques for user equipment full duplex operation Cross reference This patent application claims the benefit of U.S. patent application Ser. No. 18/493,648, entitled "TECHNIQUES FOR USER EQUIPMENT FULL-DUPLEX OPERATION" filed by ZHANG et al at 10.24 of 2023, which is assigned to the assignee of the present application and expressly incorporated herein by reference. Technical Field The following relates to wireless communications, including techniques for user equipment full duplex operation. Background Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-a Pro systems, and fifth generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems may employ techniques such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal FDMA (OFDMA), or discrete fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include one or more base stations, each supporting wireless communication for communication devices, which may be referred to as User Equipment (UEs). In some systems, certain devices (e.g., base stations, transmission reception points, radio heads, or other network entities) may operate in a full duplex mode in which the devices transmit and receive signals using the same set of radio resources (e.g., the same or overlapping sets of time and frequency resources). Efficient techniques for reliable communication when devices operate in full duplex mode may help to improve network efficiency, improve network throughput, and create an enhanced user experience. Disclosure of Invention The described technology relates to improved methods, systems, devices, and apparatus supporting techniques for User Equipment (UE) full duplex operation. For example, the described techniques provide full duplex communication at both a UE and a serving network entity, where the UE, the network entity, or both may dynamically change from full duplex communication to half duplex communication. In some aspects, UE full duplex operation is achieved by providing a network entity full duplex configuration of a set of symbols (or slots) and a UE full duplex configuration indicating a UE full duplex configuration of some or all of the symbols in the set of symbols. For example, the UE full duplex configuration may provide a corresponding full duplex configuration to the network entity full duplex configuration (e.g., a network entity configuration for downlink-uplink-downlink (D/U/D) for sub-band full duplex (SBFD) communications corresponds to the UE configuration of D/U/D). In the event that the UE would benefit from a handover to half-duplex communication (e.g., due to self-interference at the UE), the network entity may send an indication to switch one or more symbols to the half-duplex configuration. In some aspects, the half-duplex configuration may correspond to an indicated half-duplex configuration in which both the network entity and the UE operate. In other aspects, the half-duplex configuration may correspond to a full-duplex configuration of the network entity in which the UE operates in half-duplex and the network operates in full-duplex configuration (e.g., sending downlink communications to the first UE and receiving uplink communications from the second UE). In some aspects, dynamic full duplex signaling for indicating the configuration of the update of one or more symbols may be provided by Downlink Control Information (DCI), such as scheduled or non-scheduled DCI. Additionally or alternatively, dynamic full duplex signaling for indicating the updated configuration of one or more symbols may be provided by a Medium Access Control (MAC) Control Element (CE). The indication of the update of the one or more symbols may be provided by a bitmap, a predefined pattern ID, an offset/length identifying the updated symbols, or any combination thereof. In some aspects, the updating of the full duplex symbol may be initiated based on a time of receipt of the indication, based on a time of acknowledgement of the indication, based on a configuration time (e.g., configured in radio resource control signaling), based on a time indicated by the UE capability message, or any combination thereof. In some aspects, the updating of the full duplex configuration of the one or more symbols may be applicable to the one or more component carriers. A method for wireless communication by a User Equipment (UE) is described. The method may include rece