# US 11,122,611 B2 · Scheduling enhancements for latency-constrained and reliable wireless communication systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,611 B2 - Document ID: US11122611B2 - Status: Granted - Kind: B2 - Application number: 17/088,375 - Filed: 2020-11-03 - Published: 2021-03-25 - Granted: 2021-09-14 - Earliest claimed: 2016-08-11 - Assignees: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. - Applicants: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V. - Inventors: Bernd Holfeld; Dennis Wieruch; Thomas Wirth; Thomas Fehrenbach; Cornelius Hellge; Yago Sánchez De La Fuente; Thomas Schierl - Web page: https://patentgrep.com/patent/US11122611B2 ## CPC - H04W 72/04: Wireless resource allocation - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - 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 An apparatus for a wireless communication system is configured to perform semi-persistent scheduling (SPS), wherein a size of an SPS interval is based on one or more transmission time intervals (TT's). A further apparatus for a wireless communication system is described, wherein the apparatus is configured to perform semi-persistent scheduling, and wherein the apparatus is configured such that the semi-persistent scheduling is controlled via a configuration message. ## Claims ### Claim 1 An apparatus for a wireless communication system, wherein the apparatus is configured to perform semi-persistent scheduling, SPS, wherein a size of an SPS interval is based on one or more transmission time intervals, wherein the apparatus is configured to receive and process a configuration message, the configuration message comprising one or more data fields indicative of the size of the SPS interval, wherein the configuration message indicates several SPS configurations and the apparatus is configured to switch between the several SPS configurations, or selectively activate and deactivate one or more of the SPS configurations, subsequent to the configuration message and responsive to further configuration messages or control messages subsequent to the configuration message, and wherein the control message is a Downlink Control Information, DCI, and wherein the configuration message indicates several SPS configurations, the several SPS configurations being referenced by the DCI using a common SPS Radio Network Temporary Identifier, RNTI, the DCI comprising a SPS configuration index to discriminate between the several SPS configurations, the DCI causing a selective activation and deactivation of one of more of the several SPS configurations. ### Claim 2 (depends on 1) The apparatus of claim 1, configured to deactivate, activate or reconfigure the SPS responsive to an event detectable for the apparatus and a further apparatus of the wireless communication system from which the apparatus receives, or to which the apparatus transmits, payload data via resources of the semi-persistent scheduling. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the apparatus is a mobile terminal transmitting data within resources allocated by the semi-persistent scheduling, wherein the apparatus is configured to, responsive to a non-acknowledgement, NACK, message, look in a control message succeeding the NACK message for an hint on a transmission failure and information concerning a reconfiguration of the semi-persistent scheduling. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein the apparatus is configured such that the semi-persistent scheduling is reconfigured by way of configuration messages comprised by a payload section of resources of the wireless communication system allocated via the semi-persistent scheduling or in a non-semi-persistent manner. ### Claim 5 (depends on 3) The apparatus of claim 3, wherein the apparatus is configured such that the semi-persistent scheduling is reconfigurable, in addition to control messages found responsive to any NACK message, by way of configuration messages comprised by a payload section of resources of the wireless communication system allocated via the semi-persistent scheduling or in a non-semi-persistent manner exclusively. ### Claim 6 (depends on 1) The apparatus of claim 1, wherein the apparatus is configured to generate and transmit a configuration message, the configuration message comprising one or more data fields indicative of the size of the SPS interval, wherein the apparatus is configured to indirectly signal in the configuration message the size of the SPS interval using one or more codewords, with selecting the codeword one or more depending on a wanted size of the SPS interval; whether a mobile terminal to which the semi-persistent scheduling is dedicated, and for which the wanted size of an SPS interval is to be indicated by the one or more codewords is of a first type or a second type, with selecting the one or more codewords, if the mobile terminal is of the second type, additional depending on a currently set length of the transmission time interval, wherein the wanted size measures the SPS interval in units of transmission time intervals in case of the mobile terminal being of the second type and the wanted size measures the SPS interval in units of subframes in case of the mobile terminal being of the first type. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the codewords are variable length codewords. ### Claim 8 (depends on 1) A wireless communication system, comprising an apparatus according to claim 1. ### Claim 9 A method, comprising: performing semi-persistent scheduling so as to receive or transmit data in a wireless communication system, wherein a size of an SPA interval is based on one or more transmission time intervals, wherein the method comprises receiving and processing a configuration message, the configuration message comprising one or more data fields indicative of the size of the SPS interval, wherein the configuration message indicates several SPS configurations and the apparatus is configured to switch between the several SPS configurations, or selectively activate and deactivate one or more of the SPS configurations, subsequent to the configuration message and responsive to further configuration messages or control messages subsequent to the configuration message, and wherein the control message is a Downlink Control Information, DCI, and wherein the configuration message indicates several SPS configurations, the several SPS configurations being referenced by the DCI using a common SPS Radio Network Temporary Identifier, RNTI, the DCI comprising a SPS configuration index to discriminate between the several SPS configurations, the DCI causing a selective activation and deactivation of one of more of the several SPS configurations. ### Claim 10 (depends on 9) The method of claim 9, wherein the method is performed by a transmitter or a base station of the wireless communication system. ### Claim 11 A non-transitory digital storage medium having a computer program stored thereon to perform the method, comprising: performing semi-persistent scheduling so as to receive or transmit data in a wireless communication system, wherein a size of an SPA interval is based on one or more transmission time intervals, wherein the method comprises receiving and processing a configuration message, the configuration message comprising one or more data fields indicative of the size of the SPS interval, wherein the configuration message indicates several SPS configurations and the apparatus is configured to switch between the several SPS configurations, or selectively activate and deactivate one or more of the SPS configurations, subsequent to the configuration message and responsive to further configuration messages or control messages subsequent to the configuration message, and wherein the control message is a Downlink Control Information, DCI, and wherein the configuration message indicates several SPS configurations, the several SPS configurations being referenced by the DCI using a common SPS Radio Network Temporary Identifier, RNTI, the DCI comprising a SPS configuration index to discriminate between the several SPS configurations, the DCI causing a selective activation and deactivation of one of more of the several SPS configurations, when said computer program is run by a computer.