# US 10,772,118 B2 · Method and user equipment for receiving downlink control information, and method and base station for transmitting downlink control information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,772,118 B2 - Document ID: US10772118B2 - Status: Granted - Kind: B2 - Application number: 16/406,807 - Filed: 2019-05-08 - Published: 2019-08-29 - Granted: 2020-09-08 - Earliest claimed: 2014-07-28 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Suckchel Yang; Joonkui Ahn; Seungmin Lee - Web page: https://patentgrep.com/patent/US10772118B2 ## CPC - H04W 72/20: Control channels or signalling for resource management - 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 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - 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 Provided are a method and an apparatus for transmitting/receiving scheduling information for one cell (a particular cell) from among a plurality of cells under a carrier aggregation condition in which a plurality of cells are aggregated. One embodiment according to the present invention transmits/receives a downlink grant for the particular cell from a first cell from among the plurality of cells, and transmits/receives an uplink grant for the particular cell from a second cell, from among the plurality of cells, which is different from the first cell. The particular cell may be a different cell from the first and second cells, or may be the same cell as the first cell or the second cell. ## Claims ### Claim 1 A method of receiving downlink control information by a user equipment (UE), the method comprising: receiving, by the UE, first downlink control information for a first physical downlink shared channel (PDSCH) allocated to a first cell; receiving, by the UE, the first PDSCH via the first cell based on the first downlink control information; receiving, by the UE, second downlink control information for a first physical uplink shared channel (PUSCH) allocated to the first cell; and transmitting, by the UE, the first PUSCH via the first cell based on the second downlink control information, wherein the UE is configured with a downlink scheduling cell for the first cell and an uplink scheduling cell for the first cell, wherein the first downlink control information is received through the downlink scheduling cell for the first cell among a plurality of cells for the UE, and wherein the second downlink control information is received through the uplink scheduling cell configured separate from the downlink scheduling cell among the plurality of cells. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first cell is an unlicensed cell operating in an unlicensed spectrum, and wherein the unlicensed cell is not configured as a scheduling cell for the plurality of cells except the unlicensed cell. ### Claim 3 (depends on 1) The method according to claim 1, wherein each of the downlink scheduling cell and the uplink scheduling cell for the first cell is one of the plurality of cells other than another unlicensed cell. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: receiving, by the UE, third downlink control information for a second PDSCH allocated to a second cell; and receiving, by the UE, fourth downlink control information for a second PUSCH allocated to the second cell, wherein the second cell is a licensed cell operating in a licensed spectrum, and wherein the third downlink control information and the fourth downlink control information are received through a cell configured as a scheduling cell for the licensed cell among the plurality of cells. ### Claim 5 (depends on 4) The method according to claim 4, wherein the plurality of cells comprise one or more unlicensed cells and one or more licensed cells including the licensed cell, and wherein the scheduling cell for the licensed cell is none of the one or more unlicensed cells, but is one of the one or more licensed cells. ### Claim 6 A method of transmitting downlink control information by a base station (BS), the method comprising: transmitting, to a user equipment (UE), first downlink control information for a first physical downlink shared channel (PDSCH) allocated to a first cell; transmitting, to the UE, the first PDSCH via the first cell based on the first downlink control information; transmitting, to the UE, second downlink control information for a first physical uplink shared channel (PUSCH) allocated to the first cell; and receiving, from the UE, the first PUSCH via the first cell based on the second downlink control information, wherein the BS configures the UE with a downlink scheduling cell for the first cell and an uplink scheduling cell for the first cell, wherein the first downlink control information is transmitted through the downlink scheduling cell for the first cell among a plurality of cells for the UE, and wherein the second downlink control information is transmitted through the uplink scheduling cell configured separate from the downlink scheduling cell among the plurality of cells. ### Claim 7 (depends on 6) The method according to claim 6, wherein the first cell is an unlicensed cell operating in an unlicensed spectrum, and wherein the unlicensed cell is not configured as a scheduling cell for the plurality of cells except the unlicensed cell. ### Claim 8 (depends on 6) The method according to claim 6, wherein each of the downlink scheduling cell and the uplink scheduling cell for the first cell is one of the plurality of cells other than another unlicensed cell. ### Claim 9 (depends on 6) The method according to claim 6, further comprising: transmitting third downlink control information for a second PDSCH allocated to a second cell; and transmitting fourth downlink control information for a second PUSCH allocated to the second cell, wherein the second cell is a licensed cell operating in a licensed spectrum, wherein the third downlink control information and the fourth downlink control information are transmitted through a cell configured as a scheduling cell for the licensed cell among the plurality of cells. ### Claim 10 (depends on 9) The method according to claim 9, wherein the plurality of cells comprise one or more unlicensed cells and one or more licensed cells including the licensed cell, and wherein the scheduling cell for the licensed cell is none of the one or more unlicensed cells, but is one of the one or more licensed cells. ### Claim 11 A user equipment (UE) for receiving downlink control information, the UE comprising: a transceiver; a processor; and a memory storing at least one program that, when executed, causes the processor to perform operations comprising: receiving, via the transceiver, first downlink control information for a first physical downlink shared channel (PDSCH) allocated to a first cell; receiving, via the transceiver, the first PDSCH via the first cell based on the first downlink control information; receiving, via the transceiver, second downlink control information for a first physical uplink shared channel (PUSCH) allocated to the first cell; and transmitting, via the transceiver, the first PUSCH via the first cell based on the second downlink control information, wherein the UE is configured with a downlink scheduling cell for the first cell and an uplink scheduling cell for the first cell, wherein the first downlink control information is received through the downlink scheduling cell for the first cell among a plurality of cells for the UE, and wherein the second downlink control information is received through the uplink scheduling cell configured separate from the downlink scheduling cell among the plurality of cells. ### Claim 12 (depends on 11) The UE according to claim 11, wherein the first cell is an unlicensed cell operating in an unlicensed spectrum, and wherein the unlicensed cell is not configured as a scheduling cell for the plurality of cells except the unlicensed cell. ### Claim 13 (depends on 11) The UE according to claim 11, wherein each of the downlink scheduling cell and the uplink scheduling cell for the first cell is one of the plurality of cells other than another unlicensed cell. ### Claim 14 (depends on 11) The UE according to claim 11, wherein the operations further comprise: receiving, via the transceiver, third downlink control information for a second PDSCH allocated to a second cell; and receiving, via the transceiver, fourth downlink control information for a second PUSCH allocated to the second cell, wherein the second cell is a licensed cell operating in a licensed spectrum, and wherein the third downlink control information and the fourth downlink control information are received through a cell configured as a scheduling cell for the licensed cell among the plurality of cells. ### Claim 15 (depends on 14) The UE according to claim 14, wherein the plurality of cells comprise one or more unlicensed cells and one or more licensed cells including the licensed cell, and wherein the scheduling cell for the licensed cell is none of the one or more unlicensed cells, but is one of the one or more licensed cells. ### Claim 16 A base station (BS) for transmitting downlink control information, the BS comprising: a transceiver; a processor; and a memory storing at least one program that, when executed, causes the processor to perform operations comprising: transmitting, via the transceiver, first downlink control information for a first physical downlink shared channel (PDSCH) allocated to a first cell; transmitting, via the transceiver, the first PDSCH via the first cell based on the first downlink control information; transmitting, via the transceiver, second downlink control information for a first physical uplink shared channel (PUSCH) allocated to the first cell; and receiving, via the transceiver, the first PUSCH via the first cell based on the second downlink control information, wherein the BS configures the UE with a downlink scheduling cell for the first cell and an uplink scheduling cell for the first cell, wherein the first downlink control information is transmitted through the downlink scheduling cell for the first cell among a plurality of cells for the UE, and wherein the second downlink control information is transmitted through the uplink scheduling cell configured separate from the downlink scheduling cell among the plurality of cells. ### Claim 17 (depends on 16) The BS according to claim 16, wherein the first cell is an unlicensed cell operating in an unlicensed spectrum, and wherein the unlicensed cell is not configured as a scheduling cell for the plurality of cells except the unlicensed cell. ### Claim 18 (depends on 16) The BS according to claim 16, wherein each of the downlink scheduling cell and the uplink scheduling cell for the first cell is one of the plurality of cells other than another unlicensed cell. ### Claim 19 (depends on 16) The BS according to claim 16, wherein the operations further comprise: transmitting, via the transceiver, third downlink control information for a second PDSCH allocated to a second cell; and transmitting, via the transceiver, fourth downlink control information for a second PUSCH allocated to the second cell, wherein the second cell is a licensed cell operating in a licensed spectrum, and wherein the third downlink control information and the fourth downlink control information are transmitted through a cell configured as a scheduling cell for the licensed cell among the plurality of cells. ### Claim 20 (depends on 19) The BS according to claim 19, wherein the plurality of cells comprise one or more unlicensed cells and one or more licensed cells including the licensed cell, and wherein the scheduling cell for the licensed cell is none of the one or more unlicensed cells, but is one of the one or more licensed cells.