# US 11,452,093 B2 · Method for indicating preemption in a communication system using a bitmap corresponding to resources > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,093 B2 - Document ID: US11452093B2 - Status: Granted - Kind: B2 - Application number: 16/644,721 - Filed: 2018-09-12 - Published: 2020-09-10 - Granted: 2022-09-20 - Earliest claimed: 2017-09-29 - Assignees: Electronics and Telecommunications Research Institute - Applicants: Electronics and Telecommunications Research Institute - Inventors: Jung Hoon Lee; Jung Bin Kim; Cheul Soon Kim; Sung Hyun Moon; Choong Il Yeh - Web page: https://patentgrep.com/patent/US11452093B2 ## CPC - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 76/36: for reassigning the resources associated with the released connections - H04B 17/382: for resource allocation, admission control or handover - H04L 1/16: in which the return channel carries supervisory signals, e.g. repetition request signals - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04L 27/26: Systems using multi-frequency codes (H04L27/32 takes precedence) - H04W 28/00: Network traffic management; Network resource management - H04W 72/04: Wireless resource allocation - 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 - H04W 72/231: the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling - H04W 72/232: the control data signalling from the physical layer, e.g. DCI signalling - H04W 72/569: {of the traffic information} - H04W 76/20: Manipulation of established connections - H04W 76/27: Transitions between radio resource control [RRC] states - H04L 27/2666: {Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length} - H04L 47/78: Architectures of resource allocation - H04L 47/822: {Collecting or measuring resource availability data} - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method for indicating preemption in a communication system is disclosed. A method for operating a terminal comprises the steps of: receiving, from a base station, information indicating a first resource area, to which a preemption-capable resource belongs, for transmission of first data; receiving resource allocation information of second data from the base station; performing a monitoring operation for detecting a PI indicating a preempted resource for transmission of the first data in the first resource area, when the first resource area overlaps with a second resource area indicated by the resource allocation information; and performing decoding on the basis of the detected PI. Therefore, the performance of the communication system may be improved. ## Claims ### Claim 1 An operation method of a terminal in a communication system, the operation method comprising: receiving a first downlink control information (DCI) including resource allocation information from a base station; performing a receiving operation of data using resources indicated by the resource allocation information, the resources including a first resource and a second resource; receiving a second DCI including a preemption indication (PI) from the base station; and assuming that the second resource corresponding to the PI is not used for transmission of the data, wherein the PI includes a bitmap, each bit included in the bitmap indicates whether or not a resource group corresponding to the each bit among a plurality of resource groups is used for the transmission, a time resource region of the plurality of resource groups associated with the bitmap belongs to a symbol set, and a size of the symbol set is determined based on a ratio of a first subcarrier spacing applied to the plurality of resource groups associated with the bitmap and a second subcarrier spacing applied to a channel where the second DCI is received. ### Claim 2 (depends on 1) The operation method of claim 1, wherein the second resource corresponds to a resource group which is indicated to be not used for the transmission. ### Claim 3 (depends on 1) The operation method of claim 1, further comprising receiving a radio resource control (RRC) message including information on granularity of the plurality of resource groups from the base station. ### Claim 4 (depends on 3) The operation method of claim 3, wherein the plurality of resource groups is configured in a time domain, one bit included in the bitmap is mapped to one resource group among the plurality of resource groups when the information on granularity is set to a first value, and a pair of two bits included in the bitmap is mapped to one resource group among the plurality of resource groups when the information on granularity is set to a second value. ### Claim 5 (depends on 4) The operation method of claim 4, wherein one bit of the pair indicates an upper half of a frequency region in each of the plurality of resource groups, and another bit of the pair indicates a lower half of the frequency region in the each of the plurality of resource groups. ### Claim 6 (depends on 1) The operation method of claim 1, further comprising receiving a RRC message including information on a frequency resource region from the base station, and frequency resources of the plurality of resource groups associated with the bitmap belong to the frequency resource region indicated by the RRC message. ### Claim 7 (depends on 6) The operation method of claim 6, wherein the frequency resource region includes one or more physical resource blocks (PRBs) or one or more bandwidth parts (BWPs). ### Claim 8 (depends on 1) The operation method of claim 1, further comprising receiving a RRC message including information on monitoring periodicity of the second DCI from the base station. ### Claim 9 (depends on 1) The operation method of claim 1, further comprising performing a decoding operation on the data received through the first resource, and data received through the second resource is not used in the decoding operation. ### Claim 10 An operation method of a base station in a communication system, the operation method comprising: transmitting a first downlink control information (DCI) including resource allocation information to a terminal; transmitting data using a first resource among resources indicated by the resource allocation information to the terminal, the resources including the first resource and a second resource; and transmitting a second DCI including a preemption indication (PI) to the terminal, wherein the second resource corresponding to the PI is not used for transmission of the data, the PI includes a bitmap, each bit included in the bitmap indicates whether or not a resource group corresponding to the each bit among a plurality of resource groups is used for the transmission, a time resource region of the plurality of resource groups associated with the bitmap belongs to a symbol set, and a size of the symbol set is determined based on a ratio of a first subcarrier spacing applied to the plurality of resource groups associated with the bitmap and a second subcarrier spacing applied to a channel where the second DCI is received. ### Claim 11 (depends on 10) The operation method of claim 10, wherein the second resource corresponds to a resource group which is indicated to be not used for the transmission. ### Claim 12 (depends on 10) The operation method of claim 10, further comprising transmitting a radio resource control (RRC) message including information on granularity of the plurality of resource groups to the terminal. ### Claim 13 (depends on 12) The operation method of claim 12, wherein the plurality of resource groups is configured in a time domain, one bit included in the bitmap is mapped to one resource group among the plurality of resource groups when the information on granularity is set to a first value, and a pair of two bits included in the bitmap is mapped to one resource group among the plurality of resource groups when the information on granularity is set to a second value. ### Claim 14 (depends on 13) The operation method of claim 13, wherein one bit of the pair indicates an upper half of a frequency region in each of the plurality of resource groups, and another bit of the pair indicates a lower half of the frequency region in the each of the plurality of resource groups. ### Claim 15 (depends on 10) The operation method of claim 10, further comprising transmitting a RRC message including information on a frequency resource region to the terminal, and frequency resources of the plurality of resource groups associated with the bitmap belong to the frequency resource region indicated by the RRC message. ### Claim 16 (depends on 15) The operation method of claim 15, wherein the frequency resource region includes one or more physical resource blocks (PRBs) or one or more bandwidth parts (BWPs). ### Claim 17 (depends on 10) The operation method of claim 10, further comprising transmitting a RRC message including information on monitoring periodicity of the second DCI to the terminal.