# US 10,771,207 B2 · Terminal and reception power measurement method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,771,207 B2 - Document ID: US10771207B2 - Status: Granted - Kind: B2 - Application number: 15/232,409 - Filed: 2016-08-09 - Published: 2016-12-01 - Granted: 2020-09-08 - Earliest claimed: 2011-08-05 - Assignees: Panasonic Intellectual Property Corporation of America - Applicants: Panasonic Intellectual Property Corporation of America - Inventors: Akihiko Nishio; Hidetoshi Suzuki; Masayuki Hoshino; Hidenori Matsuo; Takashi Tamura - Web page: https://patentgrep.com/patent/US10771207B2 ## CPC - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04B 7/024: Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]} - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 43/16: Threshold monitoring - H04W 16/32: Hierarchical cell structures - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 52/146: {Uplink power control} - H04W 72/02: Selection of wireless resources by user or terminal - H04W 72/0473: {the resource being transmission power} - H04W 76/27: Transitions between radio resource control [RRC] states - H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection} - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 36/0088: {Scheduling hand-off measurements} - H04W 52/242: {taking into account path loss} - H04W 72/542: using measured or perceived quality - H04W 88/085: {Access point devices with remote components} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Provided is a terminal including a receiver, which, in operation, receives a Channel State Information Reference Signal (CSI-RS) candidate list for CSI-RS configuration information. The CSI-RS candidate list is indicated as Radio Resource Control (RRC) control information for respective terminals. The terminal further includes circuitry, which, in operation, specifies at least one CSI-RS resource information of a measurement target based on the CSI-RS candidate list, and measures a reception power using the specified CSI-RS resource information. The terminal also includes a transmitter, which, in operation, reports the result of the reception power measurement. A reception power measurement method is also provided. ## Claims ### Claim 1 A terminal comprising: a receiver, which, in operation, receives, by Radio Resource Control (RRC) signaling, a Channel State Information Reference Signal (CSI-RS) candidate list and a reporting condition, wherein the CSI-RS candidate list includes a plurality of CSI-RS configurations, wherein each of the plurality of CSI-RS configurations includes a CSI-RS configuration ID, a time/frequency resource position in a subframe, a cell ID, and a CSI-RS individual offset, wherein the reporting condition includes a threshold; circuitry, which is coupled to the receiver and which, in operation, determines CSI-RS resource information based on the CSI-RS candidate list, and makes reception power measurements for the plurality of CSI-RS configurations based on the determined CSI-RS resource information, wherein the reception power measurements are offset by CSI-RS individual offsets included in the plurality of CSI-RS configurations; and a transmitter, which is coupled to the circuitry and which, in operation, reports a result of the reception power measurements in response to at least one of the reception power measurements being greater than the threshold included in the reporting condition. ### Claim 2 (depends on 1) The terminal according to claim 1, wherein the circuitry makes a reception quality measurement based on the determined CSI-RS resource information; and the transmitter reports a result of the reception quality measurement. ### Claim 3 (depends on 1) The terminal according to claim 1, wherein the CSI-RS candidate list indicates CSI-RS configuration information of one or more transmission points selected from a plurality of transmission points in a macro cell. ### Claim 4 (depends on 3) The terminal according to claim 3, wherein the CSI-RS configuration information includes at least one position selected from a time resource position and a frequency resource position in a subframe (resourceConfig) of one or more CSI-RS candidates in the CSI-RS candidate list. ### Claim 5 (depends on 1) The terminal according to claim 1, wherein the reception power is a reference signal reception power (RSRP). ### Claim 6 (depends on 1) The terminal according to claim 1, wherein the transmitter, in operation, transmits channel state information (CSI). ### Claim 7 (depends on 1) The terminal according to claim 1, wherein the CSI-RS candidate list is included in a measurement object message received by the RRC signaling, wherein the measurement object message indicates measurement targets of cell specific reference signals (CRSs). ### Claim 8 (depends on 7) The terminal according to claim 7, wherein the CRSs are pre-defined in at least one standard selected from 3GPP Release 8, Release 9, and Release 10 standards. ### Claim 9 (depends on 1) The terminal according to claim 1, wherein the result of the reception power measurements includes a CSI-RS configuration ID corresponding to the at least one of the reception power measurements that is greater than the threshold included in the reporting condition. ### Claim 10 (depends on 1) The terminal according to claim 1, wherein the receiver, subsequent to the result of the reception power measurements being reported, receives a CSI-RS measurement list that is generated based on the result of the reception power measurements, and that indicates a first set of CSI-RS, the circuitry, in response to the CSI-RS measurement list being received, generates channel state information (CSI) using the first set of CSI-RS, and the transmitter, in operation, reports the CSI. ### Claim 11 (depends on 10) The terminal according to claim 10, wherein the transmitter, in operation, reports another result of the reception power measurements in response to at least one of the reception power measurements being less than the threshold included in the reporting condition, the receiver, subsequent to the another result of the reception power measurements being reported, receives another CSI-RS measurement list that is generated based on the result of the reception power measurements and the another result of the reception power measurements, and that indicates a second set of CSI-RS, the circuitry, in response to the another CSI-RS measurement list being received, generates another CSI using the second set of CSI-RS, and the transmitter, in operation, reports the another CSI. ### Claim 12 (depends on 10) The terminal according to claim 10, wherein the circuitry makes the reception power measurements periodically at a first frequency, and generates the CSI periodically at a second frequency that is higher than the first frequency. ### Claim 13 A reception power measurement method, comprising: receiving, by Radio Resource Control (RRC) signaling, a Channel State Information Reference Signal (CSI-RS) candidate list and a reporting condition, wherein the CSI-RS candidate list includes a plurality of CSI-RS configurations, wherein each of the plurality of CSI-RS configurations includes a CSI-RS configuration ID, a time/frequency resource position in a subframe, a cell ID, and a CSI-RS individual offset, wherein the reporting condition includes a threshold; determining CSI-RS resource information based on the CSI-RS candidate list; making a-reception power measurements for the plurality of CSI-RS configurations based on the determined CSI-RS resource information, wherein the reception power measurements are offset by CSI-RS individual offsets included in the plurality of CSI-RS configurations; and reporting a result of the reception power measurements in response to at least one of the reception power measurements being greater than the threshold included in the reporting condition. ### Claim 14 (depends on 13) The reception power measurement method according to claim 13, comprising: making a reception quality measurement based on the determined CSI-RS resource information; and reporting a result of the reception quality measurement. ### Claim 15 (depends on 13) The reception power measurement method according to claim 13, wherein the CSI-RS candidate list indicates CSI-RS configuration information of one or more transmission points selected from a plurality of transmission points in a macro cell. ### Claim 16 (depends on 15) The reception power measurement method according to claim 15, wherein the CSI-RS configuration information includes at least one position selected from a time resource position and a frequency resource position in a subframe (resourceConfig) of one or more CSI-RS candidates in the CSI-RS candidate list. ### Claim 17 (depends on 13) The reception power measurement method according to claim 13, wherein the reception power is a reference signal reception power (RSRP). ### Claim 18 (depends on 13) The reception power measurement method according to claim 13, comprising: transmitting channel state information (CSI). ### Claim 19 (depends on 13) The reception power measurement method according to claim 13, wherein the CSI-RS candidate list is included in a measurement object message received by the RRC signaling, wherein the measurement object message indicates measurement targets of cell specific reference signals (CRSs). ### Claim 20 (depends on 19) The reception power measurement method according to claim 19, wherein the CRSs are pre-defined in at least one standard selected from 3GPP Release 8, Release 9, and Release 10 standards. ### Claim 21 An integrated circuit which, when loaded in a communications terminal, controls operation of the communications terminal by causing the communications terminal to: receive, by Radio Resource Control (RRC) signaling, a Channel State Information Reference Signal (CSI-RS) candidate list and a reporting condition, wherein the CSI-RS candidate list includes a plurality of CSI-RS configurations, wherein each of the plurality of CSI-RS configurations includes a CSI-RS configuration ID, a time/frequency resource position in a subframe, a cell ID, and a CSI-RS individual offset, wherein the reporting condition includes a threshold; determine CSI-RS resource information based on the CSI-RS candidate list; make reception power measurements for the plurality of CSI-RS configurations based on the determined CSI-RS resource information, wherein the reception power measurements are offset by CSI-RS individual offsets included in the plurality of CSI-RS configurations; and report a result of the reception power measurements in response to at least one of the reception power measurements being greater than the threshold included in the reporting condition. ### Claim 22 (depends on 21) The integrated circuit according to claim 21, which causes the communications terminal to: makes a reception quality measurement based on the determined CSI-RS resource information; and report a result of the reception quality measurement. ### Claim 23 (depends on 21) The integrated circuit according to claim 21, wherein the CSI-RS candidate list indicates CSI-RS configuration information of one or more transmission points selected from a plurality of transmission points in a macro cell. ### Claim 24 (depends on 23) The integrated circuit according to claim 23, wherein the CSI-RS configuration information includes at least one position selected from a time resource position and a frequency resource position in a subframe (resourceConfig) of one or more CSI-RS candidates in the CSI-RS candidate list. ### Claim 25 (depends on 21) The integrated circuit according to claim 21, wherein the reception power is a reference signal reception power (RSRP). ### Claim 26 (depends on 21) The integrated circuit according to claim 21, which causes the communications terminal to: transmit channel state information (CSI). ### Claim 27 (depends on 21) The integrated circuit according to claim 21, wherein the CSI-RS candidate list is included in a measurement object message received by the RRC signaling, wherein the measurement object message indicates measurement targets of cell specific reference signals (CRSs). ### Claim 28 (depends on 27) The integrated circuit according to claim 27, wherein the CRSs are pre-defined in at least one standard selected from 3GPP Release 8, Release 9, and Release 10 standards.