# US 10,122,480 B2 · Method for reporting channel state information on transmission opportunity duration in wireless access system supporting unlicensed band, and device supporting same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,122,480 B2 - Document ID: US10122480B2 - Status: Granted - Kind: B2 - Application number: 15/307,704 - Filed: 2015-04-29 - Published: 2017-03-02 - Granted: 2018-11-06 - Earliest claimed: 2014-04-29 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Seonwook Kim; Seungmin Lee; Kijun Kim; Hanbyul Seo; Byounghoon Kim - Web page: https://patentgrep.com/patent/US10122480B2 ## CPC - H04B 17/345: Interference values ({signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]} H04B17/336) - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/001: {the frequencies being arranged in component carriers} - 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 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0023: {Time-frequency-space} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 76/15: Setup of multiple wireless link connections - H04B: TRANSMISSION - 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 The present invention relates to a wireless access system supporting an unlicensed band and provides a method for reporting channel state information (CSI) on a transmission opportunity (TxOP) duration, and devices supporting the same. According to one embodiment of the present invention, a method by which a user equipment (UE) reports CSI of a TxOP duration in a wireless access system supporting carrier aggregation (CA) with the unlicensed band comprises the steps of: receiving CSI interference measurement (CSI-IM) configuration information related to the TxOP duration through a primary cell (Pcell); measuring an interference amount in subframes of a secondary cell (Scell), in which CSI-IM is set, on the basis of the CSI-IM configuration information; measuring CSI of the TxOP duration for the Scell by using the interference amount; and transmitting the CSI to a base station, wherein the Pcell can be a serving cell configured in a licensed band, and the Scell can be a serving cell configured in the unlicensed band. ## Claims ### Claim 1 A method for reporting channel state information (CSI) on a transmission opportunity (TxOP) duration in a wireless access system supporting carrier aggregation (CA) with an unlicensed band, the method performed by a user equipment (UE) and comprising: receiving CSI interference measurement (CSI-IM) configuration information related to the TxOP duration through a primary cell (Pcell); measuring interference at subframes of a secondary cell (Scell), at which CSI-IM is configured, on the basis of the CSI-IM configuration information; measuring CSI of the TxOP duration of the Scell by using the interference; and transmitting the CSI to an enhanced Node-B (eNB), wherein the Pcell is a serving cell configured in a licensed band, and the Scell is a serving cell configured in the unlicensed band, and wherein a period for configuring the CSI-IM is configured to be smaller than a size of the TxOP duration, and the CSI-IM configuration information includes period information of the CSI-IM, size information of the TxOP duration, and an offset value for indicating a subframe at which the CSI-IM is configured. ### Claim 2 (depends on 1) The method according to claim 1, wherein the UE measures the interference by using CSI-IM only included in the TxOP duration. ### Claim 3 (depends on 1) The method according to claim 1, further comprising: receiving downlink control information (DCI) including scheduling information on the TxOP duration; and receiving downlink data at a subframe only within the TxOP duration to which the DCI is transmitted. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: performing radio resource management (RRM) for the TxOP duration; and transmitting a RRM value to the eNB, wherein the RRM value is measured based on an average interference value for taking an average within the TxOP duration and a reference signal received power value. ### Claim 5 (depends on 1) The method according to claim 1, wherein the size of the TxOP duration and a period for configuring the TxOP duration are configured based on period information of the CSI-IM, and the CSI-IM configuration information includes period information P of the CSI-IM, period information K of the TxOP duration, and size information N of the TxOP duration. ### Claim 6 (depends on 5) The method according to claim 5, wherein the period information K has a size of 2P, and the size information N is set to P+1. ### Claim 7 (depends on 1) The method according to claim 1, wherein the UE measures interference on all CSI-IMs configured within a CSI-IM duration to perform interference averaging. ### Claim 8 (depends on 7) The method according to claim 7, wherein the CSI-IM duration is configured in a unit of one or more subframes or one or more TxOP durations. ### Claim 9 (depends on 8) The method according to claim 8, wherein the UE performs the interference averaging by using only interference within a threshold value previously set based on a cumulative distribution function among interference values measured based on the CSI-IM duration. ### Claim 10 (depends on 8) The method according to claim 8, further comprising: calculating a first interference average value by using all interferences measured within the CSI-IM duration; and calculating a second interference average value by using only interference less than the first interference average value among all the interferences measured within the CSI-IM duration. ### Claim 11 A user equipment (UE) for reporting channel state information (CSI) on a transmission opportunity (TxOP) duration in a wireless access system supporting carrier aggregation (CA) with an unlicensed band, the UE comprising: a transmitter; a receiver; and a processor for controlling the transmitter and the receiver to report the CSI on the TxOP duration, wherein the processor is configured to: receive CSI interference measurement (CSI-IM) configuration information related to the TxOP duration through a primary cell (Pcell) by controlling the receiver, measure interference at subframes of a secondary cell (Scell), at which CSI-IM is configured, on the basis of the CSI-IM configuration information, measure CSI of the TxOP duration of the Scell by using the interference, and transmit the CSI to an enhanced Node-B (eNB) by controlling the transmitter, and wherein the Pcell is a serving cell configured in a licensed band, and the Scell is a serving cell configured in the unlicensed band, and wherein a period for configuring the CSI-IM is configured to be smaller than a size of the TxOP duration, and the CSI-IM configuration information includes period information of the CSI-IM, size information of the TxOP duration, and an offset value for indicating a subframe at which the CSI-IM is configured. ### Claim 12 (depends on 11) The UE according to claim 11, wherein the processor measures the interference by using CSI-IM only included in the TxOP duration. ### Claim 13 (depends on 11) The UE according to claim 11, wherein the size of the TxOP duration and a period for configuring the TxOP duration are configured based on period information of the CSI-IM, and the CSI-IM configuration information includes period information P of the CSI-IM, period information K of the TxOP duration, and size information N of the TxOP duration. ### Claim 14 (depends on 13) The UE according to claim 13, wherein the period information K has a size of 2P, and the size information N is set to P+1. ### Claim 15 (depends on 13) The UE according to claim 13, wherein the processor measures interference on all CSI-IMs configured within a CSI-IM duration to perform interference averaging. ### Claim 16 (depends on 15) The UE according to claim 15, wherein the CSI-IM duration is configured in a unit of one or more subframes or one or more TxOP durations. ### Claim 17 (depends on 16) The UE according to claim 16, wherein the processor performs the interference averaging by using only interference within a threshold value previously set based on a cumulative distribution function among interference values measured based on the CSI-IM duration. ### Claim 18 (depends on 16) The UE according to claim 16, wherein the processor is further configured to calculate a first interference average value by using all interferences measured within the CSI-IM duration and calculate a second interference average value by using only interference less than the first interference average value among all the interferences measured within the CSI-IM duration.