# US 10,455,573 B2 · Method and apparatus for transmitting and receving downlink control channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,573 B2 - Document ID: US10455573B2 - Status: Granted - Kind: B2 - Application number: 16/065,561 - Filed: 2018-04-27 - Published: 2019-02-28 - Granted: 2019-10-22 - Earliest claimed: 2017-04-28 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Kyuhwan Kwak; Inkwon Seo; Yunjung Yi; Hyunho Lee; Daesung Hwang - Web page: https://patentgrep.com/patent/US10455573B2 ## CPC - H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0092: {Indication of how the channel is divided} - 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 method of receiving a downlink control channel at a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving information on a resource element group (REG) bundle size and information on a size of a matrix for interleaving a plurality of REGs configuring at least one control channel element (CCE) through a higher layer, determining the matrix for interleaving the plurality of REGs based on the information on the size of the matrix and the information on the REG bundle size, interleaving the plurality of REGs bundled into one or more REG bundles according to the REG bundle size using the matrix, and receiving the downlink control channel based on the plurality of interleaved REGs. ## Claims ### Claim 1 A method of receiving a downlink control channel at a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station, first information related to a resource element group (REG) bundle size, and second information related to an interleaver size for interleaving REG bundles; and receiving, based on the first information related to the REG bundle size and the second information related to the interleaver size, the downlink control channel over a control resource set (CORESET) that comprises a plurality of REGs that are bundled into one or more REG bundles according to the REG bundle size, wherein the one or more REG bundles are interleaved within the CORESET according to the interleaver size, wherein a duration of the CORESET is configured to be 1, 2, or 3 Orthogonal Frequency Division Multiplexed (OFDM) symbols, wherein the REG bundle size is related to the duration of the CORESET, wherein the second information related to the interleaver size relates to one of a number of rows or a number of columns of an interleaving matrix, and wherein the other of the number of rows or the number of columns of the interleaving matrix is determined based on (i) the one of the number of rows or the number of columns of the interleaving matrix and (ii) a number of REG bundles included in the CORESET. ### Claim 2 (depends on 1) The method according to claim 1, wherein the second information relates to the number of columns of the interleaving matrix, and wherein the number of rows of the interleaving matrix is determined based on the number of columns of the interleaving matrix and a number of REG bundles included in the CORESET. ### Claim 3 (depends on 2) The method according to claim 2, wherein, based on the number of rows of the interleaving matrix not being an integer, an integer having a minimum value among integers greater than the number of rows of the interleaving matrix is determined as the number of rows of the interleaving matrix. ### Claim 4 (depends on 1) The method according to claim 1, wherein the plurality of REGs configure at least one control channel element (CCE), and wherein, based on a number of REGs included in each of the at least one CCE corresponding to a product of a value of the second information related to the interleaver size and a value of the first information related to the REG bundle size, the one or more REG bundles are mapped to physical resources at a regular interval. ### Claim 5 (depends on 1) The method according to claim 1, wherein the plurality of REGs configure at least one control channel element (CCE), and wherein, based on a value of the second information related to the interleaver size being equal to a number of REG bundles included in each of the at least one CCE, the one or more REG bundles are mapped to physical resources at a regular interval. ### Claim 6 (depends on 1) The method according to claim 1, wherein the received first information related to the REG bundle size is related to a number of symbols of the CORESET. ### Claim 7 (depends on 1) The method according to claim 1, wherein the second information is related to the number of rows of the interleaving matrix, and wherein the number of columns of the interleaving matrix is determined based on the number of rows of the interleaving matrix and a number of REG bundles included in the CORESET. ### Claim 8 (depends on 7) The method according to claim 7, wherein, based on the number of columns of the interleaving matrix not being an integer, an integer having a minimum value among integers greater than the number of columns of the interleaving matrix is determined as the number of columns of the interleaving matrix. ### Claim 9 (depends on 1) The method according to claim 1, wherein the plurality of REGs configure at least one control channel element (CCE), and wherein 6 REGs configure each of the at least one CCE. ### Claim 10 A user equipment (UE) configured to receive a downlink control channel in a wireless communication system, the UE comprising: a radio frequency (RF) module; at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: receiving, through the RF module and from a base station, (i) first information related to a resource element group (REG) bundle size, and (ii) second information related to an interleaver size for interleaving REG bundles; and receiving, through the RF module and based on the first information related to the REG bundle size and the second information related to the interleaver size, the downlink control channel over a control resource set (CORESET) that comprises a plurality of REGs that are bundled into one or more REG bundles according to the REG bundle size, wherein the one or more REG bundles are interleaved within the CORESET according to the interleaver size, wherein a duration of the CORESET is configured to be 1, 2, or 3 Orthogonal Frequency Division Multiplexed (OFDM) symbols, wherein the REG bundle size is related to the duration of the CORESET, wherein the second information related to the interleaver size relates to one of a number of rows or a number of columns of an interleaving matrix, and wherein the other of the number of rows or the number of columns of the interleaving matrix is determined based on (i) the one of the number of rows or the number of columns of the interleaving matrix and (ii) a number of REG bundles included in the CORESET. ### Claim 11 (depends on 10) The UE according to claim 10, wherein the second information relates to the number of columns of the interleaving matrix, and wherein the number of rows of the interleaving matrix is determined based on the number of columns of the interleaving matrix and a number of REG bundles included in the CORESET. ### Claim 12 (depends on 11) The UE according to claim 11, wherein, based on the number of rows of the interleaving matrix not being an integer, an integer having a minimum value among integers greater than the number of rows of the interleaving matrix is determined as the number of rows of the interleaving matrix. ### Claim 13 (depends on 10) The UE according to claim 10, wherein the plurality of REGs configure at least one control channel element (CCE), and wherein, based on the number of REGs included in each of the at least one CCE corresponding to a product of a value of the second information related to the interleaver size and a value of the first information related to the REG bundle size, the one or more REG bundles are mapped to physical resources at a regular interval. ### Claim 14 (depends on 10) The UE according to claim 10, wherein the plurality of REGs configure at least one control channel element (CCE); and wherein, based on a value of the second information related to the interleaver size being equal to a number of REG bundles included in each of the at least one CCE, the one or more REG bundles are mapped to physical resources at a regular interval. ### Claim 15 (depends on 10) The UE according to claim 10, wherein the received first information related to the REG bundle size is related to a number of symbols of the CORESET. ### Claim 16 (depends on 10) The UE according to claim 10, wherein the second information relates to the number of rows of the interleaving matrix, and wherein the number of columns of the interleaving matrix is determined based on the number of rows of the interleaving matrix and a number of REG bundles included in the CORESET. ### Claim 17 (depends on 10) The UE according to claim 10, wherein the plurality of REGs configure at least one control channel element (CCE), and wherein 6 REGs configure each of the at least one CCE.