# US 2021/0243793 A1 · Downlink control information signaling schemes for bandwidth part switching > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243793 A1 - Document ID: US20210243793A1 - Status: Published application - Kind: A1 - Application number: 17/235,487 - Filed: 2021-04-20 - Published: 2021-08-05 - Earliest claimed: 2018-02-16 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Peter Pui Lok Ang; Peter Gaal; Wanshi Chen; Alexei Yurievitch Gorokhov; Jing Sun; Joseph Binamira Soriaga; Heechoon Lee - Web page: https://patentgrep.com/patent/US20210243793A1 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0096: {Indication of changes in allocation} - H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - 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 Different sets of downlink control information (DCI) fields may be configured for DCI that includes an indication to trigger bandwidth part switching at a user equipment (UE). For example, a UE may receive DCI that triggers the UE to switch operation from a first bandwidth part to a second bandwidth part. The UE may also identify a set of transformable DCI fields and a set of non-transformable DCI fields within the DCI. The UE may then determine updated content of the DCI for application to the second bandwidth part based on whether DCI fields are included in the set of transformable or the set of non-transformable fields. In some cases, the UE may identify a null assignment in the received DCI and may switch its operation from the first bandwidth part to the second bandwidth part based on the null assignment. ## Claims ### Claim 1 A method for wireless communications at a user equipment (UE), comprising: receiving, from a base station and while operating in a first bandwidth part, downlink control information (DCI) during a first transmission time interval; receiving, as part of the DCI, an indication that the UE is to switch from operating in the first bandwidth part to operating in a second bandwidth part, the second bandwidth part beginning at a second transmission time interval that is subsequent to the first transmission time interval; and delaying monitoring for a physical downlink control channel (PDCCH) based at least in part on the received DCI triggering the switch from the first bandwidth part to the second bandwidth part. ### Claim 2 (depends on 1) The method of claim 1, wherein delaying monitoring for the PDCCH comprises: delaying monitoring for the PDCCH for a time duration beginning from a slot that includes the first transmission time interval. ### Claim 3 (depends on 2) The method of claim 2, further comprising: receiving, as part of the DCI, an indication of a scheduling delay corresponding to a quantity of slots between a control channel that includes the DCI and a physical downlink shared channel (PDSCH), wherein the time duration is based at least in part on the scheduling delay. ### Claim 4 (depends on 2) The method of claim 2, further comprising: identifying, within the DCI, an indication of a scheduling delay corresponding to a quantity of slots between a control channel including the DCI and a physical uplink shared channel (PUSCH), wherein the time duration is based at least in part on the scheduling delay. ### Claim 5 (depends on 2) The method of claim 2, wherein the time duration comprises a quantity of symbol periods after the received DCI. ### Claim 6 (depends on 1) The method of claim 1, wherein the first transmission time interval comprises a first slot, and wherein the second transmission time interval comprises a second slot different from the first slot. ### Claim 7 A method for wireless communications at a user equipment (UE), the method comprising: receiving first downlink control information (DCI) from a base station while operating in a first bandwidth part, the first DCI comprising scheduling information for a first data transmission, wherein the first DCI comprises a null assignment; and receiving, based at least in part on the first DCI comprising the null assignment, scheduling information for a second data transmission, the scheduling information received as part of second DCI that is subsequent to the first DCI. ### Claim 8 (depends on 7) The method of claim 7, further comprising: detecting content in a subset of fields from a plurality of fields of the first DCI based at least in part on the null assignment. ### Claim 9 (depends on 7) The method of claim 7, further comprising: detecting a bandwidth part identity from a field of the first DCI, the bandwidth part identity indicating a second bandwidth part different from the first bandwidth part; and determining a timing value indicating a time difference between the first DCI and a start of the second bandwidth part. ### Claim 10 (depends on 9) The method of claim 9, further comprising: switching from operating in the first bandwidth part to operating in the second bandwidth part based at least in part on the first DCI. ### Claim 11 (depends on 9) The method of claim 9, wherein the bandwidth part identity indicates switching from operating in the first bandwidth part to operating in the second bandwidth part. ### Claim 12 (depends on 9) The method of claim 9, wherein the first DCI comprises an indication of the timing value. ### Claim 13 (depends on 7) The method of claim 7, further comprising: transmitting a message to the base station based at least in part on the scheduling information for the second data transmission. ### Claim 14 (depends on 7) The method of claim 7, further comprising: detecting the null assignment within a resource assignment field of the first DCI. ### Claim 15 (depends on 7) The method of claim 7, further comprising: receiving, as part of the first DCI, an indication that the UE is to switch from operating in the first bandwidth part to operating in a second bandwidth part. ### Claim 16 (depends on 7) The method of claim 7, wherein the null assignment is associated with a second bandwidth part different from the first bandwidth part. ### Claim 17 An apparatus for wireless communications, comprising: a processor; and memory coupled with the processor, the processor and the memory configured to: receive, from a base station and while operating in a first bandwidth part, downlink control information (DCI) during a first transmission time interval; receive, as part of the DCI, an indication to switch from operating in the first bandwidth part to operating in a second bandwidth part, the second bandwidth part beginning at a second transmission time interval that is subsequent to the first transmission time interval; and delay monitoring for a physical downlink control channel (PDCCH) based at least in part on the received DCI triggering the switch from the first bandwidth part to the second bandwidth part. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the processor and the memory are further configured to: delay monitoring for the PDCCH for a time duration beginning from a slot that includes the first transmission time interval. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein the processor and the memory are further configured to: receive, as part of the DCI, an indication of a scheduling delay corresponding to a quantity of slots between a control channel that includes the DCI and a physical downlink shared channel (PDSCH), wherein the time duration is based at least in part on the scheduling delay. ### Claim 20 (depends on 18) The apparatus of claim 18, wherein the processor and the memory are further configured to: identify, within the DCI, an indication of a scheduling delay corresponding to a quantity of slots between a control channel including the DCI and a physical uplink shared channel (PUSCH), wherein the time duration is based at least in part on the scheduling delay. ### Claim 21 (depends on 18) The apparatus of claim 18, wherein the time duration comprises a quantity of symbol periods after the received DCI. ### Claim 22 An apparatus for wireless communications, comprising: a processor; and memory coupled with the processor, the processor and the memory configured to: receive first downlink control information (DCI) while operating in a first bandwidth part, the first DCI comprising scheduling information for a first data transmission, wherein the first DCI comprises a null assignment; and receive, based at least in part on the first DCI comprising the null assignment, scheduling information for a second data transmission, the scheduling information received as part of second DCI that is subsequent to the first DCI. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein the processor and the memory are further configured to: detect content in a subset of fields from a plurality of fields of the first DCI based at least in part on the null assignment. ### Claim 24 (depends on 22) The apparatus of claim 22, wherein the processor and the memory are further configured to: detect a bandwidth part identity from a field of the first DCI, the bandwidth part identity indicating a second bandwidth part different from the first bandwidth part; and determine a timing value indicating a time difference between the first DCI and a start of the second bandwidth part. ### Claim 25 (depends on 24) The apparatus of claim 24, wherein the processor and the memory are further configured to: switch from operating in the first bandwidth part to operating in the second bandwidth part based at least in part on the first DCI. ### Claim 26 (depends on 24) The apparatus of claim 24, wherein the bandwidth part identity indicates switching from operating in the first bandwidth part to operating in the second bandwidth part. ### Claim 27 (depends on 24) The apparatus of claim 24, wherein the first DCI comprises an indication of the timing value. ### Claim 28 (depends on 22) The apparatus of claim 22, wherein the processor and the memory are further configured to: detect the null assignment within a resource assignment field of the first DCI. ### Claim 29 (depends on 22) The apparatus of claim 22, wherein the processor and the memory are further configured to: receive, as part of the first DCI, an indication that the UE is to switch from operating in the first bandwidth part to operating in a second bandwidth part. ### Claim 30 (depends on 22) The apparatus of claim 22, wherein the null assignment is associated with a second bandwidth part different from the first bandwidth part.