# US 11,451,981 B2 · Apparatus and method for feeding back data receiving status > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,451,981 B2 - Document ID: US11451981B2 - Status: Granted - Kind: B2 - Application number: 16/939,286 - Filed: 2020-07-27 - Published: 2020-11-12 - Granted: 2022-09-20 - Earliest claimed: 2010-04-30 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Yingyang Li; Chengjun Sun; Xiaoqiang Li - Web page: https://patentgrep.com/patent/US11451981B2 ## CPC - H04W 24/02: Arrangements for optimising operational condition - H04J 11/00: Orthogonal multiplex systems, {e.g. using WALSH codes}(H04J13/00 takes precedence) - H04L 1/1607: Details of the supervisory signal - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 1/1861: {Physical mapping arrangements (for ACK signaling see also H04L5/0053)} - H04L 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/1614: {using bitmaps} - H04L 1/1692: {Physical properties of the supervisory signal, e.g. acknowledgement by energy bursts} - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An apparatus and a method for feeding back data receiving status, applied to a system, are provided. The method includes sequencing, by a User Equipment (UE), downlink subframes for transmitting data with respect to each Component Carrier (CC), generating receiving status feedback information for the first X downlink subframes with respect to each CC according to the result of the sequencing, where X≤M, wherein M is the number of downlink subframes on each CC, and transmitting the receiving status feedback information generated with respect to each CC to a base station. Accordingly, the UE will not misinterpret the receiving status for the downlink subframes due to inconsistencies with the base station between transmitting and receiving feedback. This affects the Hybrid Automatic Repeat Request (HARQ) transmission, saves the uplink overheads occupied by the receiving status feedback information, and increases the uplink coverage area. ## Claims ### Claim 1 A method for operating a user equipment (UE), the method comprising: identifying a data receiving status of downlink data for a plurality of subframes; identifying an uplink channel resource, among a plurality of uplink resources determined based on downlink assignment index (DAI) values for the plurality of subframes; identifying a combination of bits among a plurality of combinations of bits based on the data receiving status; and transmitting, on the uplink channel resource, the combination of bits for indicating a data receiving status for the plurality of subframes. ### Claim 2 (depends on 1) The method of claim 1, wherein the plurality of the uplink resources comprise a first uplink resource corresponding to a first subframe with a DAI value equal to 1 for a primary cell and a second uplink resource corresponding to a second subframe with the DAI value equal to 2 for the primary cell. ### Claim 3 (depends on 1) The method of claim 1, wherein the plurality of the uplink resources further comprise a third uplink resource corresponding to a third subframe with a DAI value equal to 1 for a secondary cell and a fourth uplink resource corresponding to a fourth subframe with the DAI value equal to 2 for the secondary cell. ### Claim 4 (depends on 1) The method of claim 1, wherein the plurality of the uplink resources are identified by a control channel element (CCE) used for transmission of physical downlink control channels (PDCCHs) in the plurality of the subframes. ### Claim 5 A method for operating a base station, the method comprising: receiving, from a user equipment (UE), a combination of bits on an uplink channel resource; and determining a data receiving status of the UE for a plurality of subframes based on the combination of bits and the uplink channel resource, wherein the uplink channel resource is identified among a plurality of uplink resources determined based on downlink assignment index (DAI) values for the plurality of subframes, and wherein the combination of bits is identified among a plurality of combinations of bits based on the data receiving status. ### Claim 6 (depends on 5) The method of claim 5, wherein the plurality of the uplink resources comprise a first uplink resource corresponding to a first subframe with a DAI value equal to 1 for a primary cell and a second uplink resource corresponding to a second subframe with the DAI value equal to 2 for the primary cell. ### Claim 7 (depends on 5) The method of claim 5, wherein the plurality of uplink resources further comprise a third uplink resource corresponding to a third subframe with a DAI value equal to 1 for a secondary cell and a fourth uplink resource corresponding to a fourth subframe with the DAI value equal to 2 for the secondary cell. ### Claim 8 (depends on 5) The method of claim 5, wherein the plurality of the uplink resources are identified by a control channel element (CCE) used for transmission of physical downlink control channels (PDCCHs) in the plurality of the subframes. ### Claim 9 An apparatus of a user equipment (UE), the apparatus comprising: at least one processor configured to: identify a data receiving status of downlink data for a plurality of subframes, identify an uplink channel resource, among a plurality of uplink resources determined based on downlink assignment index (DAI) values for a the plurality of subframes, identify a combination of bits among a plurality of combinations of bits based on the data receiving status, and at least one transceiver, operatively coupled to the at least one processor, configured to: transmit, on an uplink channel resource, the combination of bits for indicating a data receiving status for the plurality of subframes. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the plurality of the uplink resources comprise a first uplink resource corresponding to a first subframe with a DAI value equal to 1 for a primary cell and a second uplink resource corresponding to a second subframe with the DAI value equal to 2 for the primary cell. ### Claim 11 (depends on 9) The apparatus of claim 9, wherein the plurality of the uplink resources further comprise a third uplink resource corresponding to a third subframe with a DAI value equal to 1 for a secondary cell and a fourth uplink resource corresponding to a fourth subframe with the DAI value equal to 2 for the secondary cell. ### Claim 12 (depends on 9) The apparatus of claim 9, wherein the plurality of the uplink resources are identified by a control channel element (CCE) used for transmission of physical downlink control channels (PDCCHs) in the plurality of the subframes. ### Claim 13 An apparatus of a base station, the apparatus comprising: at least one transceiver configured to receive, from a user equipment (UE), a combination of bits on an uplink channel resource; and at least one processor, operatively coupled to the at least one transceiver, configured to determine a data receiving status of the UE for a plurality of subframes based on the combination of bits and the uplink channel resource, wherein the uplink channel resource is identified among a plurality of uplink resources determined based on downlink assignment index (DAI) values for the plurality of subframes, and wherein the combination of bits is identified among a plurality of combinations of bits based on the data receiving status. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the plurality of the uplink resources comprise a first uplink resource corresponding to a first subframe with a DAI value equal to 1 for a primary cell and a second uplink resource corresponding to a second subframe with the DAI value equal to 2 for the primary cell. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein the plurality of the uplink resources further comprise a third uplink resource corresponding to a third subframe with a DAI value equal to 1 for a secondary cell and a fourth uplink resource corresponding to a fourth subframe with the DAI value equal to 2 for the secondary cell. ### Claim 16 (depends on 13) The apparatus of claim 13, wherein the plurality of the uplink resources are identified by a control channel element (CCE) used for transmission of physical downlink control channels (PDCCHs) in the plurality of the subframes.