# US 12,016,033 B2 · Multi-TRP transmission > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,033 B2 - Document ID: US12016033B2 - Status: Granted - Kind: B2 - Application number: 17/311,529 - Filed: 2018-12-10 - Published: 2022-01-20 - Granted: 2024-06-18 - Earliest claimed: 2018-12-10 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Yukai Gao; Gang Wang - Web page: https://patentgrep.com/patent/US12016033B2 ## CPC - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04W 48/02: Access restriction performed under specific conditions - H04W 76/15: Setup of multiple wireless link connections - H04W 76/38: triggered by timers - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Embodiments of the present disclosure provide method, device and computer readable medium for multi-TRP transmission. In example embodiments, a method implemented at a terminal device is provided. The method comprises, in response to a first bandwidth part (BWP) being configured for first and second Transmission and Reception Points (TRPs) in communication with the terminal device and different Physical Downlink Control Channels (PDCCHs) being configured for the first and second TRPs, receiving, from the first TRP, a first PDCCH in a first slot. The method further comprises, in response to the first PDCCH indicating BWP switching from the first BWP to a second BWP on the first TRP, ensuring BWPs on the first and second TRPs to be aligned. In this way, BWPs for multiple TRPs can be aligned in multi-PDCCH based multi-TRP transmission. ## Claims ### Claim 1 A method implemented at a user equipment (UE), comprising: receiving configuration of a first bandwidth part (BWP) and a second BWP, wherein the first BWP is configured for a first Transmission and Reception Point (TRP) and a second TRP, wherein the first TRP and the second TRP are respectively one of multiple TRPs in communication with the UE in a multi-TRP operation, and each of the first TRP and the second TRP is in communication with the UE within the first BWP, wherein different Physical Downlink Control Channels (PDCCHs) are respectively configured for the first TRP and the second TRP; receiving from the first TRP, within the first BWP, a first PDCCH comprising a first Downlink Control Information (DCI) format scheduling the UE for the first TRP, wherein, a second PDCCH, comprising a second DCI format scheduling the UE for the second TRP, is received from the second TRP within the first BWP, the first DCI format comprises a field indicating a BWP switching from the first BWP to the second BWP, the UE is scheduled within the second BWP from the first TRP and the second TRP, after switching from the first BWP to the second BWP; and receiving from the first TRP, within the second BWP, a third PDCCH for the first TRP, wherein a fourth PDCCH for the second TRP is received from the second TRP within the second BWP. ### Claim 2 (depends on 1) The method of claim 1, further comprising: in response to failing to receive the second PDCCH from the second TRP, switching the first BWP to the second BWP; and suspending communication between the second TRP and the UE. ### Claim 3 (depends on 1) The method of claim 1, further comprising: in response to expiration of a BWP inactivity timer, resuming the communication between the second TRP and the UE on a default BWP; and switching the second BWP used for the communication between the first TRP and the UE to the default BWP. ### Claim 4 (depends on 1) The method of claim 1, further comprising: in response to failing to receive the second PDCCH from the second TRP, continuing to communicate with the first and second TRPs on the first BWP. ### Claim 5 (depends on 1) The method of claim 1, wherein the second DCI format comprises a BWP switching from the first BWP to a third BWP, and the UE is scheduled within the second BWP from the first TRP and the second TRP, after switching from the first BWP to the second BWP. ### Claim 6 A method implemented at a network device, comprising: transmitting to a User Equipment (UE), configuration of a first bandwidth part (BWP) and a second BWP, wherein the first BWP is configured for a first Transmission and Reception Point (TRP) and a second TRP, wherein the first TRP and the second TRP are respectively one of multiple TRPs in communication with the UE in a multi-TRP operation, and each of the first TRP and the second TRP is in communication with the UE within the first BWP, wherein different Physical Downlink Control Channels (PDCCHs) are respectively configured for the first TRP and the second TRP; transmitting to the UE, within the first BWP, a first PDCCH comprising a first Downlink Control Information (DCI) format scheduling the UE for the first TRP, wherein, a second PDCCH, comprising a second DCI format scheduling the UE for the second TRP, is transmitted to the UE within the first BWP, the first DCI format comprises a field indicating a BWP switching from the first BWP to the second BWP, and the UE is scheduled within the second BWP from the first TRP and the second TRP, after switching from the first BWP to the second BWP; and transmitting to the UE, within the second BWP, a third PDCCH for the first TRP, wherein a fourth PDCCH for the second TRP is transmitted to the UE within the second BWP. ### Claim 7 (depends on 6) The method of claim 6, wherein, in response to the UE failing to receive the second PDCCH from the second TRP, the UE switches the first BWP to the second BWP, and the UE suspends communication between the second TRP and the UE. ### Claim 8 (depends on 6) The method of claim 6, further comprising: in response to expiration of a BWP inactivity timer, communication between the second TRP and the UE is resumed on a default BWP; and the second BWP used for the communication between the first TRP and the UE is switched to the default BWP. ### Claim 9 (depends on 6) The method of claim 6, wherein, in response to the UE failing to receive the second PDCCH from the second TRP, the UE continues to communicate with the first and second TRPs on the first BWP. ### Claim 10 (depends on 6) The method of claim 6, wherein the second DCI format comprises a BWP switching from the first BWP to a third BWP, and the UE is scheduled within the second BWP from the first TRP and the second TRP, after switching from the first BWP to the second BWP. ### Claim 11 A network device, comprising a transmitter configured to: transmit to a User Equipment (UE), configuration of a first bandwidth part (BWP) and a second BWP, wherein the first BWP is configured for a first Transmission and Reception Point (TRP) and a second TRP, wherein the first TRP and the second TRP are respectively one of multiple TRPs in communication with the UE in a multi-TRP operation, and each of the first TRP and the second TRP is in communication with the UE within the first BWP, wherein different Physical Downlink Control Channels (PDCCHs) are respectively configured for the first TRP and the second TRP; transmit to the UE, within the first BWP, a first PDCCH comprising a first Downlink Control Information (DCI) format scheduling the UE for the first TRP, wherein, a second PDCCH, comprising a second DCI format scheduling the UE for the second TRP, is transmitted to the UE within the first BWP, the first DCI format comprises a field indicating a BWP switching from the first BWP to the second BWP, and the UE is scheduled within the second BWP from the first TRP and the second TRP, after switching from the first BWP to the second BWP; and transmit to the UE, within the second BWP, a third PDCCH for the first TRP, wherein a fourth PDCCH for the second TRP is transmitted to the UE within the second BWP. ### Claim 12 (depends on 11) The network device of claim 11, wherein, in response to the UE failing to receive the second PDCCH from the second TRP, the UE switches the first BWP to the second BWP, and the UE suspends communication between the second TRP and the UE. ### Claim 13 (depends on 12) The network device of claim 12, further comprising: in response to expiration of a BWP inactivity timer, communication between the second TRP and the UE is resumed on a default BWP; and the second BWP used for the communication between the first TRP and the UE is switched to the default BWP. ### Claim 14 (depends on 12) The network device of claim 12, wherein, in response to the UE failing to receive the second PDCCH from the second TRP, the UE continues to communicate with the first and second TRPs on the first BWP. ### Claim 15 (depends on 12) The network device of claim 12, wherein the second DCI format comprises a BWP switching from the first BWP to a third BWP, and the UE is scheduled within the second BWP from the first TRP and the second TRP, after switching from the first BWP to the second BWP.