# US 2021/0345341 A1 · Rate-matching shared channel resources around control channels for multiple users in a control resource set > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0345341 A1 - Document ID: US20210345341A1 - Status: Published application - Kind: A1 - Application number: 17/241,831 - Filed: 2021-04-27 - Published: 2021-11-04 - Earliest claimed: 2020-05-04 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Ahmed Abdelaziz Ibrahim Abdelaziz Zewail; Qiang Wu; Jing Sun; Xiaoxia Zhang; Tao Luo; Iyab Issam Sakhnini; Jun Ma; Mehmet Izzet Gurelli; Juan Montojo; Peter Gaal - Web page: https://patentgrep.com/patent/US20210345341A1 ## CPC - H04L 1/1887: {Scheduling and prioritising arrangements} - H04W 72/53: based on regulatory allocation policies - H04L 1/0068: {by puncturing} - H04L 1/1614: {using bitmaps} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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 Methods, systems, and devices for wireless communications are described in which control resources may be identified, and a data transmission may be rate-matched around the one or more control channels of multiple UEs or at multiple aggregation levels in the control resources. A user equipment (UE) may identify a search space for a first control channel, and the rate-matching of the data transmission may be performed based on a location of the search space in the control resources. In some cases, a base station may provide a mapping of resources (e.g., a bitmap) within the control resources that are occupied, which may be used for rate-matching. ## Claims ### Claim 1 An apparatus for wireless communication at a first user equipment (UE), comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive a first downlink control channel on resources of a control resource set in time domain resources, wherein the first downlink control channel schedules a downlink shared channel in the time domain resources that overlaps with the resources of the control resource set in the time domain resources; determine, based at least in part on a location of the first downlink control channel within the resources of the control resource set, a subset of resources to perform downlink shared channel rate matching around, wherein the subset of resources include the first downlink control channel and at least a second downlink control channel for at least a second UE that is different than the first UE; and process the downlink shared channel based at least in part on the downlink shared channel rate matching. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the instructions to determine are executable by the processor to cause the apparatus to: identify a plurality of search spaces within the control resource set, each of the plurality of search spaces having a corresponding search space index; identify a first search space index associated with the first downlink control channel; and determine the subset of resources based at least in part on the first search space index. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the subset of resources includes a subset of the plurality of search spaces that have a search space index that is equal to or lower than the first search space index. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the first downlink control channel and the second downlink control channel have different aggregation levels. ### Claim 5 (depends on 4) The apparatus of claim 4, wherein the instructions to determine are executable by the processor to cause the apparatus to: identify a largest search space index of one or more search space indices of one or more downlink control channels for the first UE based on a lowest aggregation level of the different aggregation levels; and determine the subset of resources based at least in part on a number of search spaces having a lower search space index than the identified largest space index, and wherein the downlink shared channel is rate-matched around the subset of resources. ### Claim 6 (depends on 4) The apparatus of claim 4, wherein the instructions to determine are executable by the processor to cause the apparatus to: identify a largest search space index of a plurality of search space indices for each of two or more different aggregation levels based at least in part on an indication provided in the first downlink control channel; and determine the subset of resources based at least in part on a number of search spaces at each of the two or more different aggregation levels having a search space index at or below the indicated largest search space index of each of the two or more different aggregation levels, and wherein the downlink shared channel is rate-matched around the subset of resources. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the instructions to determine are executable by the processor to cause the apparatus to: receive a bitmap that indicates portions of the control resource set that are included in the subset of resources. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein the bitmap indicates resources that are available for the downlink shared channel or indicates resources that are unavailable for the downlink shared channel. ### Claim 9 (depends on 7) The apparatus of claim 7, wherein a resolution of each bit of the bitmap is based at least in part on a lowest aggregation level used for downlink control channel transmissions. ### Claim 10 (depends on 7) The apparatus of claim 7, wherein the bitmap omits resource locations of the first downlink control channel. ### Claim 11 (depends on 7) The apparatus of claim 7, wherein the instructions to determine are executable by the processor to cause the apparatus to: receive configuration information that indicates one or more locations in the resources of the control resource set that are unavailable for the downlink shared channel, and wherein the bitmap omits the indicated one or more locations. ### Claim 12 (depends on 7) The apparatus of claim 7, wherein: two or more different UEs are scheduled with downlink shared channels that overlap with the subset of resources, and wherein the bitmap is provided to each of the two or more different UEs for downlink shared channel rate-matching. ### Claim 13 (depends on 1) The apparatus of claim 1, wherein the first downlink control channel includes an indication of whether one or more rate-matching information fields are provided to the first UE, and wherein the determination and the processing are performed based at least in part on the indication. ### Claim 14 (depends on 1) The apparatus of claim 1, wherein the instructions to determine are executable by the processor to cause the apparatus to: receive, from a base station, configuration information that enables rate-matching around the subset of resources, or that disables rate-matching around the subset of resources. ### Claim 15 (depends on 1) The apparatus of claim 1, wherein each of a plurality of search spaces within the control resource set is mapped to a set of control channel elements (CCEs), and wherein an index for each search space is based on a function of at least one of: an aggregation level (AL), a CCE position of the search space within the control resource set, a time-based index, a UE index, a frequency-based index, or any combinations thereof. ### Claim 16 An apparatus for wireless communication at a base station, comprising: a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: determine a first subset of resources of a control resource set for a first downlink control channel of a first user equipment (UE) and a second subset of resources of the control resource set for a second downlink control channel of a second UE, wherein the first downlink control channel schedules a first downlink shared channel in time domain resources that overlaps with the control resource set in the time domain resources; rate-match the first downlink shared channel around the first subset of resources and the second subset of resources; and transmit the first downlink control channel to the first UE, the second downlink control channel to the second UE, and the first downlink shared channel to the first UE, and wherein wireless resources for the first downlink shared channel are based at least in part on the rate-match of the first downlink shared channel around the first subset of resources and the second subset of resources. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the instructions to determine are executable by the processor to cause the apparatus to: identify a plurality of search spaces within the control resource set, each of the plurality of search spaces having a corresponding search space index; identify a first search space index associated with the first downlink control channel; and determine both the first subset of resources and the second subset of resources based at least in part on the first search space index. ### Claim 18 (depends on 17) The apparatus of claim 17, wherein the second subset of resources is selected to have a second search space index that is lower than the first search space index. ### Claim 19 (depends on 17) The apparatus of claim 17, wherein each of the plurality of search spaces have a same aggregation level. ### Claim 20 (depends on 16) The apparatus of claim 16, wherein the first downlink control channel and the second downlink control channel have different aggregation levels. ### Claim 21 (depends on 20) The apparatus of claim 20, wherein the instructions to determine are executable by the processor to cause the apparatus to: identify a largest search space index of one or more search space indices of one or more downlink control channels for the first downlink control channel based on a lowest aggregation level of the different aggregation levels; and determine the second subset of resources based at least in part on a number of search spaces having a lower search space index than the identified largest space index. ### Claim 22 (depends on 16) The apparatus of claim 16, wherein the instructions to determine are executable by the processor to cause the apparatus to: transmit a bitmap to at least the first UE that indicates portions of the control resource set that are included in the first subset of resources and the second subset of resources. ### Claim 23 (depends on 16) The apparatus of claim 16, wherein the instructions to determine are executable by the processor to cause the apparatus to: configure the first UE to enable rate-matching around the first subset of resources and the second subset of resources, or to disable rate-matching around the first subset of resources and the second subset of resources. ### Claim 24 A method for wireless communication at a first user equipment (UE), comprising: receiving a first downlink control channel on resources of a control resource set in time domain resources, wherein the first downlink control channel schedules a downlink shared channel in the time domain resources that overlaps with the resources of the control resource set in the time domain resources; determining, based at least in part on a location of the first downlink control channel within the resources of the control resource set, a subset of resources to perform downlink shared channel rate matching around, wherein the subset of resources include the first downlink control channel and at least a second downlink control channel for at least a second UE that is different than the first UE; and processing the downlink shared channel based at least in part on the downlink shared channel rate matching. ### Claim 25 (depends on 24) The method of claim 24, wherein the determining comprises: identifying a plurality of search spaces within the control resource set, each of the plurality of search spaces having a corresponding search space index; identifying a first search space index associated with the first downlink control channel; and determining the subset of resources based at least in part on the first search space index. ### Claim 26 (depends on 24) The method of claim 24, wherein the determining further comprises: receiving a bitmap that indicates portions of the control resource set that are included in the subset of resources. ### Claim 27 (depends on 24) The method of claim 24, wherein the first downlink control channel includes an indication of whether one or more rate-matching information fields are provided to the first UE, and wherein the determining and the processing are performed based at least in part on the indication. ### Claim 28 A method for wireless communication at a base station, comprising: determining a first subset of resources of a control resource set for a first downlink control channel of a first user equipment (UE) and a second subset of resources of the control resource set for a second downlink control channel of a second UE, wherein the first downlink control channel schedules a first downlink shared channel in time domain resources that overlaps with the control resource set in the time domain resources; rate-matching the first downlink shared channel around the first subset of resources and the second subset of resources; and transmitting the first downlink control channel to the first UE, the second downlink control channel to the second UE, and the first downlink shared channel to the first UE, and wherein wireless resources for the first downlink shared channel are based at least in part on the rate-matching. ### Claim 29 (depends on 28) The method of claim 28, wherein the determining comprises: identifying a plurality of search spaces within the control resource set, each of the plurality of search spaces having a corresponding search space index; identifying a first search space index associated with the first downlink control channel; and determining both the first subset of resources and the second subset of resources based at least in part on the first search space index. ### Claim 30 (depends on 28) The method of claim 28, further comprising: transmitting a bitmap to at least the first UE that indicates portions of the control resource set that are included in the first subset of resources and the second subset of resources.