# US 10,485,021 B2 · Method and apparatus for controlling 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 10,485,021 B2 - Document ID: US10485021B2 - Status: Granted - Kind: B2 - Application number: 14/200,445 - Filed: 2014-03-07 - Published: 2014-09-11 - Granted: 2019-11-19 - Earliest claimed: 2013-03-07 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hyojin Lee; Younsun Kim; Yongjun Kwak; Youngbum Kim; Juho Lee; Hyoungju Ji - Web page: https://patentgrep.com/patent/US10485021B2 ## CPC - H04J 11/0023: {Interference mitigation or co-ordination (direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541)} - H04L 5/0016: {Time-frequency-code} - H04L 5/0092: {Indication of how the channel is divided} - H04W 74/002: {Transmission of channel access control information} - H04L 1/0025: {Transmission of mode-switching indication} - 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 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 27/2602: {Signal structure} - H04L 27/2613: {Structure of the reference signals} - 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 method and apparatus for transmitting control information is provided for use in detection of interference an signal in a wireless communication system. An interference control method of a base station of a mobile communication system includes scheduling data to be transmitted to a terminal and transmitting control information including data channel information on the scheduled data and interference signal information to the terminal. ## Claims ### Claim 1 A method by a base station of a mobile communication system, the method comprising: identifying downlink control information including first information related to scheduling data, second information on a second reference signal of a cell associated with the base station being quasi co-located with a first reference signal of an interference signal, and third information on a scrambling sequence of the first reference signal of the interference signal; and transmitting, to a terminal, the identified downlink control information, wherein the first reference signal of the interference signal comprises a demodulation reference signal (DMRS) of the interference signal, and wherein the second reference signal of the cell associated with the base station further comprises at least one of a channel status information reference signal (CSI-RS) and a cell-specific reference signal (CRS). ### Claim 2 (depends on 1) The method of claim 1, wherein the downlink control information comprises information related to a modulation scheme of the interference signal and information on a layer of the first reference signal of the interference signal. ### Claim 3 (depends on 1) The method of claim 1, wherein the downlink control information comprises an indicator related to interference cancellation, and wherein the terminal is configured to receive the data based on the second information if the downlink control information includes an indication related to interference cancellation. ### Claim 4 A method by a terminal in a wireless communication system, the method comprising: receiving, from a base station, downlink control information including first information related to scheduling data, second information on a second reference signal of a cell associated with the base station being quasi co-located with a first reference signal of an interference signal, and third information on a scrambling sequence of the first reference signal of the interference signal; and receiving, from the base station, the data based on the downlink control information, wherein the first reference signal of the interference signal comprises a demodulation reference signal (DMRS) of the interference signal, and wherein the second reference signal of the cell associated with the base station further comprises at least one of a channel status information reference signal (CSI-RS) and a cell-specific reference signal (CRS). ### Claim 5 (depends on 4) The method of claim 4, wherein the downlink control information comprises information related to a modulation scheme of the interference signal and information on a layer of the reference signal of the interference signal. ### Claim 6 (depends on 4) The method of claim 4, wherein the receiving, from the base station, the data comprises: receiving, if the downlink control information comprises an indicator related to interference cancellation, the data based on the second information. ### Claim 7 A base station in a mobile communication system, the base station comprising: a transceiver configured to transmit and receive at least one signal; and a controller coupled with the transceiver and configured to: identify downlink control information including first information related to scheduling data, second information on a second reference signal of a cell associated with the base station being quasi co-located with a first reference signal of an interference signal, and third information on a scrambling sequence of the first reference signal of the interference signal, and transmit, to the terminal, the identified downlink control information, wherein the first reference signal of the interference signal comprises a demodulation reference signal (DMRS) of an interference signal, and wherein the second reference signal of the cell associated with the base station further comprises at least one of a channel status information reference signal (CSI-RS) and a cell-specific reference signal (CRS). ### Claim 8 (depends on 7) The base station of claim 7, wherein the downlink control information comprises information related to a modulation scheme of an interference signal and information on a layer of the reference signal of the interference signal. ### Claim 9 (depends on 7) The base station of claim 7, wherein the downlink control information comprises an indicator related to interference cancellation, and wherein the terminal is configured to receive the data based on the second information if the downlink control information includes an indication related to interference cancellation. ### Claim 10 A terminal in a mobile communication system, the terminal comprising: a transceiver configured to transmit and receive at least one signal; and a controller coupled with the transceiver and configured to: receive, from a base station, downlink control information including first information related to scheduling data, second information on a second reference signal of a cell associated with the base station being quasi co-located with a first reference signal of an interference signal, and third information on a scrambling sequence of the first reference signal of the interference signal, and receive, from the base station, the data based on the downlink control information, wherein the first reference signal of the interference signal comprises a demodulation reference signal (DMRS) of the interference signal, and wherein the second reference signal of the cell associated with the base station further comprises at least one of a channel status information reference signal (CSI-RS) and a cell-specific reference signal (CRS). ### Claim 11 (depends on 10) The terminal of claim 10, wherein the downlink control information comprises information related to a modulation scheme of the interference signal and information on a layer of the reference signal of the interference signal. ### Claim 12 (depends on 10) The terminal of claim 10, wherein the controller is further configured to receive, if the downlink control information comprises an indicator related to interference cancellation, the data based on the second information.