# US 12,603,726 B2 · Enhanced fast CRS rate matching selection in DSS > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,603,726 B2 - Document ID: US12603726B2 - Status: Granted - Kind: B2 - Application number: 18/263,040 - Filed: 2022-01-28 - Published: 2024-03-07 - Granted: 2026-04-14 - Earliest claimed: 2021-01-29 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Ramy Atawia; Karl Mann; Ravikiran Nory - Web page: https://patentgrep.com/patent/US12603726B2 ## CPC - H04L 1/0067: {Rate matching (H04L1/0013 and H04L1/08 take precedence)} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/1273: of downlink data flows - H04W 72/231: the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04W 8/24: Transfer of terminal data - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W 88/10: adapted for operation in multiple networks, e.g. multi-mode access points - 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 network node configured to communicate with a wireless device (WD) utilizing at least one of a first Radio Access Technology (RAT) and a second RAT is provided. The network node includes processing circuitry configured to determine a rate matching configuration from a plurality of rate matching configurations for communication with the WD and cause the network node to transmit an indication of the determined rate matching configuration to the WD and to use the determined rate matching configuration in at least another transmission towards the WD. ## Claims ### Claim 1 A network node configured to communicate with a wireless device (WD) utilizing at least one of a first Radio Access Technology (RAT) and a second RAT, the network node comprising processing circuitry configured to: determine a rate matching configuration from a plurality of rate matching configurations for communication with the WD; cause the network node to transmit an indication of the determined rate matching configuration to the WD and to use the determined rate matching configuration in at least one transmission towards the WD; and cause the network node to transmit a first message in a predetermined time slot, the first message indicating a value that causes the WD to at least one of: determine whether a set of resource elements are available for a Physical Downlink Shared Channel (PDSCH) in a set of time slots, the set of time slots including at least one slot of the set of time slots one of: in which the PDSCH is scheduled by a Physical Downlink Control Channel (PDCCH) Downlink Control Information (DCI) format; received after the PDCCH DCI format is detected; received after a Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) is transmitted by the WD in response to the command detected in the PDCCH DCI format; and determined by the WD by a predetermined bitfield provided in the first message; and determine whether a second set of resource elements indicated by a first rate matching configuration and indicated by a second rate matching configuration of the plurality of rate matching configurations are available for the PDSCH in the set of time slots, the set of time slots being indicated at least by one of the first message and a second message different from the first message. ### Claim 2 (depends on 1) The network node of claim 1, wherein the processing circuitry is further configured to: determine that the WD supports rate matching, including a Downlink Control Information (DCI) based Common Reference Signal (CRS) rate matching; generate the plurality of rate matching configurations, each of the plurality of rate matching configurations being selectable based at least on a DCI field, the DCI field indicating at least one of a semi-static rate matching configuration and a CRS rate matching configuration; and cause the network node to transmit to the WD the plurality of rate matching configurations. ### Claim 3 (depends on 2) The network node of claim 2, wherein determining the rate matching configuration from the plurality of rate matching configurations for communication with the WD further includes: measuring a load associated with at least one of the first RAT and the second RAT; determining a resource for each one of the first RAT and the second RAT; and selecting the rate matching configuration, the rate matching configuration being the CRS rate matching configuration. ### Claim 4 (depends on 3) The network node of claim 3, wherein the selecting the rate matching includes: when physical resources are allocated for the first RAT: muting a Long Term Evolution (LTE) CRS and indicating in DCI that CRS rate matching may be omitted; and determining a number of subframes corresponding to the muted LTE CRS; reconfiguring one rate matching configuration from the plurality of rate matching configurations based on the number of subframes; and causing the network node to transmit the reconfigured one rate matching configuration to the WD and other WDs. ### Claim 5 (depends on 1) The network node of claim 1, wherein the indication of the determined rate matching configuration is one of DCI and a Medium Access Control (MAC) layer command. ### Claim 6 (depends on 1) The network node of claim 1, wherein determining the rate matching configuration from the plurality of rate matching configurations for communication with the WD is based at least in part on a neighbor interference. ### Claim 7 (depends on 1) The network node of claim 1, wherein determining the rate matching configuration from the plurality of rate matching configurations for communication with the WD includes: determining a radio channel condition associated with one of the first RAT and the second RAT; measuring a load of neighboring cells associated with one of the first RAT and the second RAT; identifying an interfered rate matching configuration based on the radio channel condition and the load of neighboring cells; and including at least one neighboring rate matching pattern in the plurality of rate matching configurations, the at least one neighboring rate matching pattern excluding at least one resource element associated with the interfered rate matching configuration. ### Claim 8 (depends on 1) The network node of claim 1, wherein the processing circuitry is further configured to: evaluate and learn the rate matching configuration based at least on Key Performance Indicators (KPIs) a muted Common Reference Signal (CRS) on Long Term Evolution (LTE), and adjustments associated with wireless devices operating on New Radio (NR). ### Claim 9 A method implemented in a network node configured to communicate with a wireless device (WD) utilizing at least one of a first Radio Access Technology (RAT) and a second RAT, the method comprising: determining a rate matching configuration from a plurality of rate matching configurations for communication with the WD; transmitting an indication of the determined rate matching configuration to the WD and using the determined rate matching configuration in at least one transmission towards the WD; and transmitting a first message in a predetermined time slot, the first message indicating a value that causes the WD to at least one of: determine whether a set of resource elements are available for a Physical Downlink Shared Channel (PDSCH) in a set of time slots, the set of time slots including at least one slot of the set of time slots one of: in which the PDSCH is scheduled by a Physical Downlink Control Channel (PDCCH) Downlink Control Information (DCI) format; received after the PDCCH DCI format is detected; received after a Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) is transmitted by the WD in response to the command detected in the PDCCH DCI format; and determined by the WD by a predetermined bitfield provided in the first message; and determine whether a second set of resource elements indicated by a first rate matching configuration and indicated by a second rate matching configuration of the plurality of rate matching configurations are available for the PDSCH in the set of time slots, the set of time slots being indicated at least by one of the first message and a second message different from the first message. ### Claim 10 (depends on 9) The method of claim 9, wherein method further includes: determining that the WD supports rate matching, including a Downlink Control Information (DCI) based Common Reference Signal (CRS) rate matching; and generating the plurality of rate matching configurations, each of the plurality of rate matching configurations being selectable based at least on a DCI field, the DCI field indicating at least one of a semi-static rate matching configuration and a CRS rate matching configuration; and transmitting to the WD the plurality of rate matching configurations. ### Claim 11 (depends on 9) The method of claim 9, wherein the indication of the determined rate matching configuration is one of DCI and a Medium Access Control (MAC) layer command. ### Claim 12 (depends on 9) The method of claim 9, wherein determining the rate matching configuration from the plurality of rate matching configurations for communication with the WD further includes: measuring a load associated with at least one of the first RAT and the second RAT; determining a resource for each one of the first RAT and the second RAT; and selecting the rate matching configuration, the rate matching configuration being the CRS rate matching configuration. ### Claim 13 (depends on 12) The method of claim 12, wherein the selecting the rate matching includes: when physical resources are allocated for the first RAT: muting a Long Term Evolution (LTE) and indicating in DCI that CRS rate matching may be omitted; and determining a number of subframes corresponding to the muted LTE CRS; reconfiguring one rate matching configuration from the plurality of rate matching configurations based on the number of subframes; and transmitting the reconfigured one rate matching configuration to the WD and other WDs. ### Claim 14 (depends on 9) The method of claim 9, wherein determining the rate matching configuration from the plurality of rate matching configurations for communication with the WD is based at least in part on a neighbor interference. ### Claim 15 (depends on 9) The method of claim 9, wherein determining the rate matching configuration from the plurality of rate matching configurations for communication with the WD includes: determining a radio channel condition associated with one of the first RAT and the second RAT; measuring a load of neighboring cells associated with one of the first RAT and the second RAT; identifying an interfered rate matching configuration based on the radio channel condition and the load of neighboring cells; and including at least one neighboring rate matching pattern in the plurality of rate matching configurations, the at least one neighboring rate matching pattern excluding at least one resource element associated with the interfered rate matching configuration. ### Claim 16 (depends on 9) The method of claim 9, wherein the method further includes: evaluating and learning the rate matching configuration based at least on Key Performance Indicators (KPIs) a muted Common Reference Signal (CRS) on Long Term Evolution (LTE), and adjustments associated with wireless devices operating on New Radio (NR).