# US 10,484,064 B2 · Method and apparatus for downlink and uplink CSI acquisition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,064 B2 - Document ID: US10484064B2 - Status: Granted - Kind: B2 - Application number: 15/690,055 - Filed: 2017-08-29 - Published: 2018-03-01 - Granted: 2019-11-19 - Earliest claimed: 2016-09-01 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Eko Onggosanusi; Hongbo Si; Md. Saifur Rahman; Aris Papasakellariou - Web page: https://patentgrep.com/patent/US10484064B2 ## CPC - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0413: MIMO systems - H04B 7/0421: {utilizing implicit feedback, e.g. steered pilot signals} - H04B 7/0478: {Special codebook structures directed to feedback optimisation} - 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 5/0055: {Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861)} - H04B 7/0628: {Diversity capabilities} - H04B 7/068: {using space frequency diversity (space-frequency coding H04L1/0606)} - H04H 20/59: for emergency or urgency - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 88/02: Terminal devices - H04W 88/08: Access point devices - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04H: BROADCAST COMMUNICATION (multiplex communication H04J; pictorial communication aspects of broadcast systems H04N) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Methods and apparatuses for CSI reporting mechanisms are provided. A user equipment (UE) includes a transceiver configured to receive configuration information for channel state information (CSI) calculation and reporting. The configuration information includes settings comprising at least one CSI reporting setting, at least one reference signal (RS) setting, and a measurement setting. The UE also includes a processor operably connected to the transceiver. The processor is configured to decode the configuration information and calculate CSI according to the settings, The transceiver is further configured to transmit the calculated CSI on an uplink (UL) channel. ## Claims ### Claim 1 A user equipment (UE) comprising: a transceiver configured to receive, from a base station (BS) via radio resource control (RRC) signaling, configuration information including a channel state information (CSI) reporting configuration and a CSI resource configuration, wherein the CSI reporting configuration includes: information associated with a CSI reporting type which is one of periodic, semi-persistent, or aperiodic; and information associated with a set of physical resource blocks (PRBs) for which CSI is reported; and wherein the CSI resource configuration includes: information associated with locations of CSI-reference signals (CSI-RSs) in a time domain and a frequency domain; and information associated with indicating a number of CSI-RS ports; and a processor operably connected to the transceiver, the processor configured to decode the configuration information and determine CSI based on the CSI reporting configuration and the CSI resource configuration, wherein the transceiver is further configured to transmit the determined CSI on an uplink (UL) channel. ### Claim 2 (depends on 1) The UE of claim 1, wherein the CSI resource configuration includes information associated with CSI-interference measurement (CSI-IM) resources for interference measurement. ### Claim 3 (depends on 1) The UE of claim 1, wherein the CSI resource configuration further includes: information associated with a CSI-RS type which is one of periodic, aperiodic, or semi-persistent; information associated with a periodicity and an offset for CSI-RSs; and information associated with an energy-per resource element (EPRE) for CSI-RS. ### Claim 4 (depends on 1) The UE of claim 1, wherein the CSI reporting configuration further includes information associated with at least one CSI component to report including at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), or a CSI resource indicator (CRI). ### Claim 5 (depends on 4) The UE of claim 4, wherein the CSI reporting configuration further includes: information associated with a frequency granularity related PMI which is one of wideband and subband; and information associated with a frequency granularity related CQI which is one of wideband and subband. ### Claim 6 A base station (BS) comprising: a processor configured to generate configuration information including a channel state information (CSI) reporting configuration and a CSI resource configuration, wherein the CSI reporting configuration includes: information associated with a CSI reporting type which is one of periodic, semi-persistent, or aperiodic; and information associated with a set of physical resource blocks (PRBs) for which CSI is reported; and wherein the CSI resource configuration includes: information associated with locations of CSI-reference signals (CSI-RSs) in a time domain and a frequency domain; and information associated with indicating a number of CSI-RS ports; a transceiver operably connected to the processor, the transceiver configured to: transmit, to a user equipment (UE), the configuration information via radio resource control (RRC) signaling; and receive, from the UE, CSI based on the CSI reporting configuration and the CSI resource configuration. ### Claim 7 (depends on 6) The BS of claim 6, wherein the CSI resource configuration includes information associated with CSI-interference measurement (CSI-IM) resources for interference measurement. ### Claim 8 (depends on 6) The BS of claim 6, wherein the CSI resource configuration further includes: information associated with a CSI-RS type which is one of periodic, aperiodic, or semi-persistent; information associated with a periodicity and an offset for CSI-RSs; and information associated with an energy-per resource element (EPRE) for CSI-RS. ### Claim 9 (depends on 6) The BS of claim 6, wherein the CSI reporting configuration further includes information associated with at least one CSI component to report including at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), or a CSI resource indicator (CRI). ### Claim 10 (depends on 9) The BS of claim 9, wherein the CSI reporting configuration further includes: information associated with a frequency granularity related PMI which is one of wideband and subband; and information associated with a frequency granularity related CQI which is one of wideband and subband. ### Claim 11 A method for operating a user equipment (UE), the method comprising: receiving, by the UE from a base station (BS) via radio resource control (RRC) signaling, configuration information including a channel state information (CSI) reporting configuration and a CSI resource configuration, wherein the CSI reporting configuration includes: information associated with a CSI reporting type which is one of periodic, semi-persistent, or aperiodic; and information associated with a set of physical resource blocks (PRBs) for which CSI is reported; and wherein the CSI resource configuration includes: information associated with locations of CSI-reference signals (CSI-RSs) in a time domain and a frequency domain; and information associated with indicating a number of CSI-RS ports; decoding, by the UE, the configuration information; determining, by the UE, CSI based on the CSI reporting configuration and the CSI resource configuration; and transmitting, by the UE, the determined CSI on an uplink (UL) channel. ### Claim 12 (depends on 11) The method of claim 11, wherein the CSI resource configuration includes information associated with CSI-interference measurement (CSI-IM) resources for interference measurement. ### Claim 13 (depends on 11) The method of claim 11, wherein the CSI resource configuration further includes: information associated with a CSI-RS type which is one of periodic, aperiodic, or semi-persistent; information associated with a periodicity and an offset for CSI-RSs; and information associated with an energy-per resource element (EPRE) for CSI-RS. ### Claim 14 (depends on 11) The method of claim 11, wherein the CSI reporting configuration further includes information associated with at least one CSI component to report including at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), or a CSI resource indicator (CRI). ### Claim 15 (depends on 14) The method of claim 14, wherein the CSI reporting configuration further includes: information associated with a frequency granularity related PMI which is one of wideband and subband; and information associated with a frequency granularity related CQI which is one of wideband and subband. ### Claim 16 A method for operating a base station (BS), the method comprising: generating configuration information including a channel state information (CSI) reporting configuration and a CSI resource configuration, wherein the CSI reporting configuration includes: information associated with a CSI reporting type which is one of periodic, semi-persistent, or aperiodic; and information associated with a set of physical resource blocks (PRBs) for which CSI is reported; and wherein the CSI resource configuration includes: information associated with locations of CSI-reference signals (CSI-RSs) in a time domain and a frequency domain; and information associated with indicating a number of CSI-RS ports; transmitting, to a user equipment (UE), the configuration information via radio resource control (RRC) signaling; and receiving, from the UE, CSI based on the CSI reporting configuration and the CSI resource configuration. ### Claim 17 (depends on 16) The method of claim 16, wherein the CSI resource configuration includes information associated with CSI-interference measurement (CSI-IM) resources for interference measurement. ### Claim 18 (depends on 16) The method of claim 16, wherein the CSI resource configuration further includes: information associated with a CSI-RS type which is one of periodic, aperiodic, or semi-persistent; information associated with a periodicity and an offset for CSI-RSs; and information associated with an energy-per resource element (EPRE) for CSI-RS. ### Claim 19 (depends on 16) The method of claim 16, wherein the CSI reporting configuration further includes information associated with at least one CSI component to report including at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), or a CSI resource indicator (CRI). ### Claim 20 (depends on 19) The method of claim 19, wherein the CSI reporting configuration further includes: information associated with a frequency granularity related PMI which is one of wideband and subband; and information associated with a frequency granularity related CQI which is one of wideband and subband.