# US 2017/0288757 A1 · Method of reporting channel state and apapratus therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288757 A1 - Document ID: US20170288757A1 - Status: Published application - Kind: A1 - Application number: 15/473,911 - Filed: 2017-03-30 - Published: 2017-10-05 - Earliest claimed: 2016-03-31 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Kunil Yum; Yunjung Yi - Web page: https://patentgrep.com/patent/US20170288757A1 ## CPC - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04L 47/17: Interaction among intermediate nodes, e.g. hop by hop - H04W 72/54: based on quality criteria - H04W 74/0838: using contention-free random access [CFRA] - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method of reporting a channel state, which is reported by a terminal configured to transmit and receive data while hopping in a unit of the specific number of resource blocks (RBs) in a wireless communication system, includes receiving a random access response including an aperiodic channel state report request in response to a transmitted random access preamble, calculating channel state information according to the aperiodic channel state report request in consideration of the number of repetitive transmissions for the terminal, and reporting the calculated channel state information to a base station. In this case, the number of repetitive transmissions for the terminal may be determined by a predetermined or signaled value. ## Claims ### Claim 1 A method of reporting a channel state, which is reported by a terminal configured to transmit and receive data while hopping in a unit of the specific number of resource blocks (RBs) in a wireless communication system, comprising: receiving a random access response including an aperiodic channel state report request in response to a transmitted random access preamble; calculating channel state information according to the aperiodic channel state report request in consideration of the number of repetitive transmissions for the terminal; and reporting the calculated channel state information to a base station, wherein the number of repetitive transmissions for the terminal is determined by a predetermined or signaled value. ### Claim 2 (depends on 1) The method of claim 1, wherein the number of repetitive transmissions for the terminal is determined by the number of repetitive transmissions for an uplink transmission to be transmitted in response to the random access response or a value resulted from multiplying the number of repetitive transmissions for the uplink transmission by a scaling factor. ### Claim 3 (depends on 1) The method of claim 1, wherein the number of repetitive transmissions for the terminal is determined by the number of repetitive transmissions of the random access preamble or a value mapped to the number of repetitive transmissions of the random access preamble. ### Claim 4 (depends on 1) The method of claim 1, wherein the number of repetitive transmissions for the terminal is determined by the maximum value among the number of repetitive transmissions of a downlink data channel and the number of repetitive transmissions of a downlink control channel which are determined according to a coverage enhancement level related to the random access preamble. ### Claim 5 (depends on 1) The method of claim 1, wherein the number of repetitive transmissions for the terminal is determined by the maximum value among candidates of the numbers of repetitive transmissions for calculating channel state information set to the terminal. ### Claim 6 (depends on 1) The method of claim 1, wherein the number of repetitive transmissions for the terminal is determined by the maximum number of repetitive transmissions or the number of repetitive transmissions included in system information received from the base station or a system. ### Claim 7 (depends on 6) The method of claim 6, wherein the maximum number of repetitive transmissions or the number of repetitive transmissions included in the system information received from the base station or the system is set per a coverage enhancement level related to the random access preamble. ### Claim 8 (depends on 6) The method of claim 6, wherein the maximum number of repetitive transmissions or the number of repetitive transmissions included in the system information received from the base station or the system is set to by a value irrespective of the coverage enhancement level related to the random access preamble. ### Claim 9 (depends on 1) The method of claim 1, wherein the number of repetitive transmissions for the terminal is determined by the number of repetitive transmissions of the random access response or the maximum number of repetitive transmissions of the random access response, or a value mapped to the number of repetitive transmissions of the random access response or the maximum number of repetitive transmissions of the random access response. ### Claim 10 (depends on 1) The method of claim 1, wherein the number of repetitive transmissions for the terminal is determined by the maximum number of repetitive transmissions, the minimum number of repetitive transmissions, or an average value of the number of repetitive transmissions of a downlink data channel for the terminal. ### Claim 11 A terminal configured to report a channel state, transmit and receive data, and hop in a unit of the specific number of resource blocks (RBs) in a wireless communication system, comprising: a transmitter and a receiver; and a processor configured to control the transmitter and the receiver, the processor configured to receive a random access response including an aperiodic channel state report request in response to a transmitted random access preamble, calculate channel state information according to the aperiodic channel state report request in consideration of the number of repetitive transmissions for the terminal, and report the calculated channel state information to a base station, wherein the number of repetitive transmissions for the terminal is determined by a predetermined or signaled value. ### Claim 12 (depends on 11) The terminal of claim 11, wherein the number of repetitive transmissions for the terminal is determined by the number of repetitive transmissions for an uplink transmission to be transmitted in response to the random access response or a value resulted from multiplying the number of repetitive transmissions for the uplink transmission by a scaling factor. ### Claim 13 (depends on 11) The terminal of claim 11, wherein the number of repetitive transmissions for the terminal is determined by the number of repetitive transmissions of the random access preamble or a value mapped to the number of repetitive transmissions of the random access preamble. ### Claim 14 (depends on 11) The terminal of claim 11, wherein the number of repetitive transmissions for the terminal is determined by the maximum value among the number of repetitive transmissions of a downlink data channel and the number of repetitive transmissions of a downlink control channel which are determined according to a coverage enhancement level related to the random access preamble. ### Claim 15 (depends on 11) The terminal of claim 11, wherein the number of repetitive transmissions for the terminal is determined by the maximum value among candidates of the numbers of repetitive transmissions for calculating channel state information set to the terminal. ### Claim 16 (depends on 11) The terminal of claim 11, wherein the number of repetitive transmissions for the terminal is determined by the maximum number of repetitive transmissions or the number of repetitive transmissions included in system information received from the base station or a system. ### Claim 17 (depends on 16) The terminal of claim 16, wherein the maximum number of repetitive transmissions or the number of repetitive transmissions included in the system information received from the base station or the system is set per a coverage enhancement level related to the random access preamble. ### Claim 18 (depends on 16) The terminal of claim 16, wherein the maximum number of repetitive transmissions or the number of repetitive transmissions included in the system information received from the base station or the system is set to a value irrespective of the coverage enhancement level related to the random access preamble. ### Claim 19 (depends on 11) The terminal of claim 11, wherein the number of repetitive transmissions for the terminal is determined by the number of repetitive transmissions of the random access response or the maximum number of repetitive transmissions of the random access response, or a value mapped to the number of repetitive transmissions of the random access response or the maximum number of repetitive transmissions of the random access response. ### Claim 20 (depends on 11) The terminal of claim 11, wherein the number of repetitive transmissions for the terminal is determined by the maximum number of repetitive transmissions, the minimum number of repetitive transmissions, or an average value of the number of repetitive transmissions of a downlink data channel for the terminal.