# US 2022/0045831 A1 · User equipment and method for handling switching time period of downlink-uplink switching for half duplex-frequency division duplex operation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0045831 A1 - Document ID: US20220045831A1 - Status: Published application - Kind: A1 - Application number: 17/397,112 - Filed: 2021-08-09 - Published: 2022-02-10 - Earliest claimed: 2020-08-07 - Assignees: FG Innovation Company Limited - Applicants: FG Innovation Company Limited - Inventors: WAN-CHEN LIN; HAI-HAN WANG; CHIA-HAO YU - Web page: https://patentgrep.com/patent/US20220045831A1 ## CPC - H04L 5/0092: {Indication of how the channel is divided} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/16: Half-duplex systems; Simplex/duplex switching; Transmission of break signals {non-automatically inverting the direction of transmission} - H04W 72/044: based on the type of the allocated resource - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - 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 A user equipment and a method for handling a switching time period of downlink (DL)-uplink (UL) switching for half duplex-frequency division duplex operation are provided. The method includes: receiving a first configuration for a first active bandwidth part (BWP) with a first sub-carrier spacing (SCS), the first active BWP being one of an active UL BWP and an active DL BWP; receiving a second configuration for configuring a second active BWP with a second SCS, the second active BWP being another one of the active UL BWP and the active DL BWP; receiving a third configuration for the switching time period, the switching time period having a unit of symbol; performing communication with a Base Station (BS) on the first active BWP with the first SCS; and performing, after the switching time period, communication with the BS on the second active BWP with the second SCS. ## Claims ### Claim 1 A method performed by a user equipment (UE) for handling a switching time period of downlink (DL)-uplink (UL) switching for half duplex-frequency division duplex (HD-FDD) operation, the method comprising: receiving a first configuration for a first active bandwidth part (BWP) with a first sub-carrier spacing (SCS), the first active BWP being one of an active UL BWP and an active DL BWP; receiving a second configuration for a second active BWP with a second SCS, the second active BWP being another one of the active UL BWP and the active DL BWP; receiving a third configuration for the switching time period, the switching time period having a unit of symbol; performing communication with a Base Station (BS) on the first active BWP with the first SCS; and performing, after the switching time period, communication with the BS on the second active BWP with the second SCS. ### Claim 2 (depends on 1) The method according to claim 1, wherein: the first SCS is larger than the second SCS, the communication on the first active BWP ends at an ending symbol, the switching time period begins at a starting symbol, and the starting symbol is determined based on the ending symbol. ### Claim 3 (depends on 1) The method according to claim 1, wherein: the first SCS is larger than the second SCS, the communication on the second active BWP begins at a first starting symbol, the switching time period begins at a second starting symbol, and the second starting symbol is determined based on the first starting symbol. ### Claim 4 (depends on 1) The method according to claim 1, wherein: the communication on the second active BWP begins at a first starting symbol, the switching time period begins at a second starting symbol, and the second starting symbol is determined based on the first starting symbol. ### Claim 5 (depends on 1) The method according to claim 1, wherein: the first active BWP is the active DL BWP, the second active BWP is the active UL BWP, and the switching time period includes a timing advance (TA) time period. ### Claim 6 (depends on 1) The method according to claim 1, wherein a length of the switching time period is determined based on the second SCS. ### Claim 7 A user equipment (UE) for handling a switching time period of downlink (DL)-uplink (UL) switching for half duplex-frequency division duplex (HD-FDD) operation, the UE comprising: one or more non-transitory computer-readable media having computer-executable instructions embodied thereon; and at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor is configured to execute the computer-executable instructions to: receive a first configuration for a first active bandwidth part (BWP) with a first sub-carrier spacing (SCS), the first active BWP being one of an active UL BWP and an active DL BWP; receive a second configuration for a second active BWP with a second SCS, the second active BWP being another one of the active UL BWP and the active DL BWP; receive a third configuration for the switching time period, the switching time period having a unit of symbol; perform communication with a Base Station (BS) on the first active BWP with the first SCS; and perform, after the switching time period, communication with the BS on the second active BWP with the second SCS. ### Claim 8 (depends on 7) The UE according to claim 7, wherein: the first SCS is larger than the second SCS, the communication on the first active BWP ends at an ending symbol, the switching time period begins at a starting symbol, and the starting symbol is determined based on the ending symbol. ### Claim 9 (depends on 7) The UE according to claim 7, wherein: the first SCS is larger than the second SCS, the communication on the second active BWP begins at a first starting symbol, the switching time period begins at a second starting symbol, and the second starting symbol is determined based on the first starting symbol. ### Claim 10 (depends on 7) The UE according to claim 7, wherein: the communication on the second active BWP begins at a first starting symbol, the switching time period begins at a second starting symbol, and the second starting symbol is determined based on the first starting symbol. ### Claim 11 (depends on 7) The UE according to claim 7, wherein: the first active BWP is the active DL BWP, the second active BWP is the active UL BWP, and the switching time period includes a timing advance (TA) time period. ### Claim 12 (depends on 7) The UE according to claim 7, wherein a length of the switching time period is determined based on the second SCS.