# US 11,121,792 B2 · Resource allocation method for controlling inter-cell interference in wireless communication system operating in flexible duplex mode on a cell-by-cell basis, and apparatus therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,792 B2 - Document ID: US11121792B2 - Status: Granted - Kind: B2 - Application number: 16/325,176 - Filed: 2017-08-04 - Published: 2019-06-20 - Granted: 2021-09-14 - Earliest claimed: 2016-08-12 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Dongkyu Kim; Yunjung Yi; Sangrim Lee - Web page: https://patentgrep.com/patent/US11121792B2 ## CPC - H04J 11/005: {of intercell interference} - H04J 11/0056: {Inter-base station aspects} - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04L 27/2666: {Acquisition of further OFDM parameters, e.g. bandwidth, subcarrier spacing, or guard interval length} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/541: using the level of interference - 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) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A resource allocation method for controlling, by a base station, inter-cell interference in a wireless communication system operating in a flexible duplex mode on a cell-by-cell basis may comprise the steps of: receiving, from an adjacent base station, information on a resource for downlink only, allocated to an adjacent cell to which the adjacent base station belongs, in a predetermined subframe; and allocating, to terminals in a cell to which the base station belongs, a resource for the cell, which corresponds to the resource for downlink only, allocated to the adjacent cell, as a resource for downlink only, on the basis of the information on the resource. ## Claims ### Claim 1 A method of allocating a resource for a base station to control inter-cell interference in a wireless communication system operating in flexible duplex mode per cell, the method comprising: receiving information on a resource only for downlink allocated for an adjacent cell having an adjacent base station belong thereto in a prescribed subframe from the adjacent base station; and allocating a resource of a cell, to which the base station belongs, corresponding to the resource only for the downlink allocated to the adjacent cell to user equipments within the base station belonging cell as a resource only for downlink based on the information on the resource, wherein the resource only for the downlink allocated to the base station belonging cell is allocated to a partial frequency band in a bandwidth of the prescribed subframe. ### Claim 2 (depends on 1) The method of claim 1, wherein based on bandwidths used by the wireless communication system and a different wireless communication being are adjacent to both edges of the bandwidth, both edge bands of the bandwidth are allocated as a resource only for uplink. ### Claim 3 (depends on 1) The method of claim 1, wherein the information on the resource further includes one of an identifier of the adjacent base station, information on a Guard Band (GB), time information operating in the flexible duplex mode, and frequency information operating in the flexible duplex mode. ### Claim 4 (depends on 3) The method of claim 3, further comprising transmitting the information on the resource to the UE within the base station belonging cell. ### Claim 5 (depends on 1) The method of claim 1, wherein both edge bands of the prescribed subframe are allocated as a resource only for uplink. ### Claim 6 (depends on 1) The method of claim 1, wherein when the adjacent base station receives uplink, based on a level of interference caused to the adjacent base station by the base station exceeding a prescribed threshold, the information on the resource is received from the adjacent base station. ### Claim 7 (depends on 1) The method of claim 1, wherein based on a reliability of a signal received by the adjacent base station becoming lower than a prescribed threshold, the information on the resource is received from the adjacent base station. ### Claim 8 A base station in performing resource allocation to control inter-cell interference in a wireless communication system operating in flexible duplex mode per cell, the base station comprising: a transmitter; a receiver; and at least one processor coupled with the transmitter and the receiver, wherein the at least one processor is configured to: control the receiver to receive information on a resource only for downlink allocated for an adjacent cell having an adjacent base station belong thereto in a prescribed subframe from the adjacent base station; and allocate a resource of a cell, to which the base station belongs, corresponding to the resource only for the downlink allocated to the adjacent cell to user equipments within the base station belonging cell as a resource only for downlink based on the information on the resource, wherein the resource only for the downlink allocated to the base station belonging cell is allocated to a partial frequency band in a bandwidth of the prescribed subframe. ### Claim 9 (depends on 8) The base station of claim 8, wherein based on bandwidths used by the wireless communication system and a different wireless communication system being adjacent to both edges of the bandwidth, the processor allocates both edge bands of the bandwidth as a resource only for uplink. ### Claim 10 (depends on 8) The base station of claim 8, wherein the information on the resource further includes one of an identifier of the adjacent base station, information on a Guard Band (GB), time information operating in the flexible duplex mode, and frequency information operating in the flexible duplex mode. ### Claim 11 (depends on 10) The base station of claim 10, wherein the at least one processor is further configured to control the transmitter to transmit the information on the resource to the UE within the base station belonging cell. ### Claim 12 (depends on 8) The base station of claim 8, wherein the processor allocates both edge bands of the prescribed subframe as a resource only for uplink. ### Claim 13 (depends on 8) The base station of claim 8, wherein when the adjacent base station receives uplink, based on a level of interference caused to the adjacent base station by the base station exceeding a prescribed threshold, the receiver receives the information on the resource from the adjacent base station and wherein based on a reliability of a signal received by the adjacent base station becoming lower than a prescribed threshold, the receiver receives the information on the resource from the adjacent base station.