# US 2026/0100809 A1 · Subband full-duplex slot after bandwidth part switch > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0100809 A1 - Document ID: US20260100809A1 - Status: Published application - Kind: A1 - Application number: 19/347,954 - Filed: 2025-10-02 - Published: 2026-04-09 - Earliest claimed: 2024-10-04 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Prashant SHARMA; Jae Ho RYU; Muhammad Sayed Khairy ABDELGHAFFAR - Web page: https://patentgrep.com/patent/US20260100809A1 ## CPC - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication for a bandwidth part (BWP) switch. The UE may communicate a message in a subband full duplex (SBFD) slot after an end of a BWP switch delay associated with the indication, based at least in part on a schedule or a link direction configured for the SBFD slot. Numerous other aspects are described. ## Claims ### Claim 1 An apparatus for wireless communication at a user equipment (UE), comprising: one or more memories; and one or more processors, coupled to the one or more memories, individually or collectively configured to cause the UE to: receive an indication for a bandwidth part (BWP) switch; and communicate a message in a subband full duplex (SBFD) slot after an end of a BWP switch delay associated with the indication, based at least in part on a schedule or a link direction configured for the SBFD slot. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein to communicate the message, the one or more processors are individually or collectively configured to cause the UE to transmit an uplink message in the SBFD slot. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein to communicate the message, the one or more processors are individually or collectively configured to cause the UE to receive a downlink message in the SBFD slot. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein a first slot after the end of the BWP switch delay is the SBFD slot. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the one or more processors are individually or collectively configured to cause the UE to transmit an indication of a UE capability for supporting transmission of an uplink message or reception of a downlink message in the SBFD slot after the end of the BWP switch delay. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the one or more processors are individually or collectively configured to cause the UE to receive a channel state information reference signal (CSI-RS) on a new BWP that was dormant before the BWP switch, and wherein to receive the indication, the one or more processors are individually or collectively configured to cause the UE to receive the indication in a downlink slot or an SBFD slot for a serving cell. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein to receive the CSI-RS, the one or more processors are individually or collectively configured to cause the UE to receive the CSI-RS in a first downlink slot after the downlink slot of the indication. ### Claim 8 (depends on 6) The apparatus of claim 6, wherein to receive the CSI-RS, the one or more processors are individually or collectively configured to cause the UE to receive the CSI-RS in a specified symbol of a first SBFD slot that occurs a specified time duration after the downlink slot of the indication. ### Claim 9 An apparatus for wireless communication at a network entity, comprising: one or more memories; and one or more processors, coupled to the one or more memories, individually or collectively configured to cause the network entity to: transmit an indication for a bandwidth part (BWP) switch; and communicate a message in a subband full duplex (SBFD) slot after an end of a BWP switch delay associated with the indication. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein to communicate the message, the one or more processors are individually or collectively configured to cause the network entity to receive an uplink message in the SBFD slot. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein to communicate the message, the one or more processors are individually or collectively configured to cause the network entity to transmit a downlink message in the SBFD slot. ### Claim 12 (depends on 9) The apparatus of claim 9, wherein a first slot after the end of the BWP switch delay is the SBFD slot. ### Claim 13 (depends on 9) The apparatus of claim 9, wherein the one or more processors are individually or collectively configured to cause the network entity to receive an indication of a UE capability for supporting transmission of an uplink message or reception of a downlink message in the SBFD slot after the end of the BWP switch delay. ### Claim 14 (depends on 9) The apparatus of claim 9, wherein the one or more processors are individually or collectively configured to cause the network entity to transmit a channel state information reference signal (CSI-RS) on a new BWP that was dormant before the BWP switch, and wherein to transmit the indication, the one or more processors are individually or collectively configured to cause the network entity to transmit the indication in a downlink slot or an SBFD slot for a serving cell. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein to transmit the CSI-RS, the one or more processors are individually or collectively configured to cause the network entity to transmit the CSI-RS in a first downlink slot after the downlink slot of the indication. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein to transmit the CSI-RS, the one or more processors are individually or collectively configured to cause the network entity to transmit the CSI-RS in a specified symbol of a first SBFD slot that occurs a specified time duration after the downlink slot of the indication. ### Claim 17 An apparatus for wireless communication at a user equipment (UE), comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the UE to: receive an indication for a bandwidth part (BWP) switch or a configuration for a timer-based BWP switch; and communicate a message in a subband full duplex (SBFD) slot according to a first set of link directions that are determined based at least in part by the indication or a second set of link directions. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the first set of link directions is for all symbols in the SBFD slot and is a same set of link directions as the second set of link directions, and wherein the second set of link directions is the set of link directions of a first slot of a source BWP. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the indication is received in downlink control information, and wherein the first slot of the source BWP is a same slot as a downlink slot or an SBFD slot in which the indication is received. ### Claim 20 (depends on 17) The apparatus of claim 17, wherein the first set of link directions is a same set of link directions as a set of link directions of a first slot of a downlink subframe or a downlink half-subframe after an expiration of a BWP inactivity timer. ### Claim 21 (depends on 17) The apparatus of claim 17, wherein the indication is transmitted in a radio resource control (RRC) message, and wherein the first set of link directions is a same set of link directions as a set of link directions of a last slot overlapping with a physical downlink shared channel message that includes the RRC message. ### Claim 22 (depends on 17) The apparatus of claim 17, wherein the one or more processors are individually or collectively configured to cause the UE to receive an indication of the first set of link directions in a radio resource control message or a medium access control control element. ### Claim 23 (depends on 17) The apparatus of claim 17, wherein the one or more processors are individually or collectively configured to cause the UE to receive an indication of the first set of link directions in downlink control information that includes the indication for the BWP switch or the configuration. ### Claim 24 An apparatus for wireless communication at a network entity, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the network entity to: transmit an indication for a bandwidth part (BWP) switch or a configuration for a timer-based BWP switch; and communicate a message in a subband full duplex (SBFD) slot according to a first set of link directions that are determined based at least in part by the indication or a second set of link directions. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the first set of link directions is for all symbols in the SBFD slot and is a same set of link directions as the second set of link directions, and wherein the second set of link directions is the set of link directions of a first slot of a source BWP. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein the indication is transmitted in downlink control information, and wherein the first slot of the source BWP is a same slot as a downlink slot or an SBFD slot in which the indication is transmitted. ### Claim 27 (depends on 24) The apparatus of claim 24, wherein the first set of link directions is a same set of link directions as a set of link directions of a first slot of a downlink subframe or a downlink half-subframe after an expiration of a BWP inactivity timer. ### Claim 28 (depends on 24) The apparatus of claim 24, wherein the indication is transmitted in a radio resource control message, and wherein the first set of link directions is a same set of link directions as a set of link directions of a last slot overlapping with a physical downlink shared channel message that includes the RRC message. ### Claim 29 (depends on 24) The apparatus of claim 24, wherein the one or more processors are individually or collectively configured to cause the network entity to transmit an indication of the first set of link directions in a radio resource control message or a medium access control control element. ### Claim 30 (depends on 24) The apparatus of claim 24, wherein the one or more processors are individually or collectively configured to cause the network entity to transmit an indication of the first set of link directions in downlink control information that includes the indication for the BWP switch of the configuration.