# US 11,444,744 B2 · Apparatus and method for managing interference in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,444,744 B2 - Document ID: US11444744B2 - Status: Granted - Kind: B2 - Application number: 16/840,979 - Filed: 2020-04-06 - Published: 2020-07-23 - Granted: 2022-09-13 - Earliest claimed: 2017-05-26 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Sangkyu Park; Gyouhwan Kim; Jai-Jin Lim; Jaeho Jeon; Youngkyu Choi - Web page: https://patentgrep.com/patent/US11444744B2 ## CPC - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - 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 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 5/1469: {using time-sharing} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/20: Control channels or signalling for resource management - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 48/12: using downlink control channel - 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 An apparatus of a base station in a wireless communication system supporting time division duplex (TDD) and a method thereof are provided. The apparatus includes at least one transceiver, and at least one processor operatively connected with the at least one transceiver. The at least one processor may be configured to perform signaling for preventing transmission of an uplink (UL) signal in a cell, and measure a strength of a downlink (DL) signal received from at least one base station during at least one symbol in a UL subframe. The apparatus relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long-Term Evolution (LTE). ## Claims ### Claim 1 A method performed by a victim base station in a wireless communication system supporting time division duplex (TDD), the method comprising: configuring downlink (DL) and uplink (UL) patterns, the downlink and uplink patterns sequentially comprising a DL period, a guard period (GP) between the DL period and a UL period, and the UL period; obtaining a measurement result of a DL signal of an aggressor base station configured with the DL pattern and the UL pattern, during at least one symbol period of the UL period; and transmitting, to the aggressor base station, a notification signal for indicating that remote interference occurs by the aggressor base station based on the measurement result; wherein the DL signal is configured to be transmitted in the DL period of the DL and UL patterns in the aggressor base station. ### Claim 2 (depends on 1) The method of claim 1, further comprising: receiving a result of the notification signal from the aggressor base station, wherein the result of the notification signal is transmitted via a backhaul between the victim base station and the aggressor base station. ### Claim 3 (depends on 1) The method of claim 1, wherein the obtaining of the measurement result comprises: handling over a terminal radio resource control (RRC) connected to the victim base station to a carrier that is different from the carrier of a cell. ### Claim 4 (depends on 1) The method of claim 1, wherein the obtaining of the measurement result comprises: releasing a radio resource control (RRC) connection between the victim base station and a RRC connected terminal. ### Claim 5 (depends on 1) The method of claim 1, wherein the DL signal comprises dummy data generated to measure the remote interference. ### Claim 6 (depends on 5) The method of claim 5, wherein the dummy data is generated according to a size of a load determined based on a resource usage of the aggressor base station. ### Claim 7 (depends on 5) The method of claim 5, wherein the dummy data is generated according to a predetermined size of a load. ### Claim 8 (depends on 1) The method of claim 1, wherein the notification signal comprises information on a number of UL symbols related to the remote interference. ### Claim 9 (depends on 8) The method of claim 8, wherein the number of UL symbols related to the remote interference is based on a distance between the victim base station and the aggressor base station. ### Claim 10 (depends on 1) The method of claim 1, wherein the transmitting of the notification signal comprises: identifying whether the remote interference occurs based on the measurement result. ### Claim 11 (depends on 10) The method of claim 10, wherein the identifying of whether the remote interference occurs comprises: in case that strength of a signal measured in a specific symbol among the at least one symbol period is greater than or equal to a threshold value, identifying that the remote interference due to the aggressor base station occurs; and in case that the strength of the signal measured in the specific symbol is less than the threshold value, identifying that the remote interference due to the aggressor base station does not occur. ### Claim 12 (depends on 10) The method of claim 10, wherein the identifying of whether the remote interference occurs comprises: in case that a number of symbols with strength of signal measured greater than or equal to a detection threshold value among symbols in the at least one symbol period is greater than or equal to a threshold number of symbols, identifying that the remote interference due to the aggressor base station occurs; and in case that the number of symbols is smaller than the threshold number of symbols, identifying that the remote interference due to the aggressor base station does not occur. ### Claim 13 A victim base station in a wireless communication system supporting time division duplex (TDD), the victim base station comprising: at least one transceiver; and at least one processor operatively coupled to the at least one transceiver, wherein the at least one processor is configured to: configure downlink (DL) and uplink (UL) patterns, the downlink and uplink patterns sequentially comprising a DL period, a guard period (GP) between the DL period and a UL period, and the UL period, obtain a measurement result of a DL signal of an aggressor base station configured with the DL pattern and the UL pattern, during at least one symbol period of the UL period, and transmit, to the aggressor base station, a notification signal for indicating that remote interference occurs by the aggressor base station based on the measurement result, and wherein the DL signal is configured to be transmitted in the DL period of the DL and UL patterns in the aggressor base station. ### Claim 14 (depends on 13) The victim base station of claim 13, wherein the at least one processor is further configured to: receive a result of the notification signal from the aggressor base station, and wherein the result of the notification signal is transmitted via a backhaul between the victim base station and the aggressor base station. ### Claim 15 (depends on 13) The victim base station of claim 13, wherein in order to obtain the measurement result, the at least one processor is further configured to: hand over a terminal radio resource control (RRC) connected to the victim base station to a carrier that is different from a carrier of a cell. ### Claim 16 (depends on 13) The victim base station of claim 13, wherein in order to obtain the measurement result, the at least one processor is further configured to: release a radio resource control (RRC) connection between the victim base station and an RRC connected terminal. ### Claim 17 (depends on 13) The victim base station of claim 13, wherein the DL signal comprises dummy data generated to measure the remote interference. ### Claim 18 (depends on 17) The victim base station of claim 17, wherein the dummy data is generated according to a size of a load determined based on a resource usage of the aggressor base station. ### Claim 19 (depends on 17) The victim base station of claim 17, wherein the dummy data is generated according to a predetermined size of a load. ### Claim 20 (depends on 13) The victim base station of claim 13, wherein the notification signal comprises information on a number of UL symbols related to the remote interference. ### Claim 21 (depends on 20) The victim base station of claim 20, wherein the number of UL symbols related to the remote interference is based on a distance between the victim base station and the aggressor base station. ### Claim 22 (depends on 13) The victim base station of claim 13, wherein in order to transmit the notification signal, the at least one processor is further configured to: identify whether the remote interference occurs based on the measurement result. ### Claim 23 (depends on 22) The victim base station of claim 22, wherein in order to identify whether the remote interference occurs, the at least one processor is further configured to: in case that strength of a signal measured in a specific symbol among the at least one symbol period is greater than or equal to a threshold value, identify that the remote interference due to the aggressor base station occurs; and in cast that the strength of the signal measured in the specific symbol is less than the threshold value, identify that the remote interference due to the aggressor base station does not occur. ### Claim 24 (depends on 22) The victim base station of claim 22, wherein in order to identify whether the remote interference occurs, the at least one processor is further configured to: in case that a number of symbols with strength of signal measured greater than or equal to a detection threshold value among symbols in the at least one symbol period is greater than or equal to a threshold number of symbols, identify that the remote interference due to the aggressor base station occurs, and in case that the number of symbols is smaller than the threshold number of symbols, identify that the remote interference due to the aggressor base station does not occur.