# US 12,016,040 B2 · Radio station, radio terminal, and method for terminal measurement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,040 B2 - Document ID: US12016040B2 - Status: Granted - Kind: B2 - Application number: 17/879,018 - Filed: 2022-08-02 - Published: 2022-11-24 - Granted: 2024-06-18 - Earliest claimed: 2014-09-12 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Hisashi Futaki - Web page: https://patentgrep.com/patent/US12016040B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 72/04: Wireless resource allocation - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/542: using measured or perceived quality - H04W 74/0808: using carrier sensing, e.g. carrier sense multiple access [CSMA] - 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 radio station (1) transmits, to a radio terminal (3) on a licensed frequency (Cell #1), control signaling (S102) associated with at least one of a measurement timing and a measurement period of terminal measurement on an unlicensed frequency (Cell #2) and receives, from the radio terminal (3) on the licensed frequency (Cell #1), a result of the terminal measurement that is executed in response to the control signaling (S102) and in accordance with at least one of the measurement timing and the measurement period (S105). This contributes, for example, to acquisition of information useful for the radio station to determine whether to allow the radio terminal to perform communication on the unlicensed frequency. ## Claims ### Claim 1 A method of a master base station in a dual connectivity, the method comprising: communicating with a radio terminal in a dual connectivity, the dual connectivity using a Master Cell Group (MCG) and a Secondary Cell Group (SCG), the MCG being a group of serving cells associated with the master base station, the SCG being a group of serving cells associated with a secondary base station, the master base station using a licensed frequency, the secondary base station using a shared spectrum; receiving, from the secondary base station, control information associated with a signal measurement on the shared spectrum; transmitting the control information to the radio terminal on the licensed frequency, wherein the control information is generated by the secondary base station, wherein the control information includes: information indicating a second period, wherein the second period comprises a first period in which a signal can be transmitted and a third period in which the radio terminal is not needed to perform the signal measurement, the first period occurs periodically at a periodicity of the second period, and the third period follows the first period; and an offset value to indicate a subframe number and a System Frame Number (SFN) at which the first period is started; and receiving, from the radio terminal on the licensed frequency, a result of the signal measurement which is performed within the first period. ### Claim 2 (depends on 1) The method of the master base station according to claim 1, further comprising transmitting the result of the signal measurement to the secondary base station. ### Claim 3 (depends on 1, 2) The method of the master base station according to claim 1 or 2, wherein the signal measurement includes a Received Signal Strength Indicator (RSSI) measurement. ### Claim 4 (depends on 1, 2) The method of the master base station according to claim 1 or 2, wherein the signal measurement includes at least one of a Received Signal Received Power (RSRP) measurement and a Received Signal Received Quality (RSRQ) measurement. ### Claim 5 (depends on 4) The method of the master base station according to claim 4, wherein the signal includes a discovery signal. ### Claim 6 A method of a secondary base station in a dual connectivity, the method comprising: communicating with a radio terminal in a dual connectivity, the dual connectivity using a Master Cell Group (MCG) and a Secondary Cell Group (SCG), the MCG being a group of serving cells associated with a master base station, the SCG being a group of serving cells associated with the secondary base station, the master base station using a licensed frequency, the secondary base station using a shared spectrum; and transmitting, to the master base station, control information associated with a signal measurement on the shared spectrum, wherein the control information is transmitted to the radio terminal on the licensed frequency, wherein the control information is generated by the secondary base station, and wherein the control information includes: information indicating a second period, wherein the second period comprises a first period in which a signal can be transmitted and a third period in which the radio terminal is not needed to perform the signal measurement, the first period occurs periodically at a periodicity of the second period, and the third period follows the first period; and an offset value to indicate a subframe number and a System Frame Number (SFN) at which the first period is started. ### Claim 7 (depends on 6) The method of the secondary base station according to claim 6, further comprising receiving a result of the signal measurement from the maser base station, the result of the signal measurement transmitted from the radio terminal to the master base station on the licensed frequency. ### Claim 8 (depends on 6, 7) The method of the secondary base station according to claim 6 or 7, wherein the signal measurement includes a Received Signal Strength Indicator (RSSI) measurement. ### Claim 9 (depends on 6, 7) The method of the secondary base station according to claim 6 or 7, wherein the signal measurement includes at least one of a Received Signal Received Power (RSRP) measurement and a Received Signal Received Quality (RSRQ) measurement. ### Claim 10 (depends on 9) The method of the secondary base station according to claim 9, wherein the signal includes a discovery signal. ### Claim 11 A method of a radio terminal, the method comprising: communicating with a master base station and a secondary base station in a dual connectivity, the dual connectivity using a Master Cell Group (MCG) and a Secondary Cell Group (SCG), the MCG being a group of serving cells associated with the master base station, the SCG being a group of serving cells associated with the secondary base station, the master base station using a licensed frequency, the secondary base station using a shared spectrum; and receiving, from the master base station on the licensed frequency, control information associated with a signal measurement on the shared spectrum, wherein the control information is transmitted from the secondary base station to the master base station, wherein the control information is generated by the secondary base station, and wherein the control information includes: information indicating a second period, wherein the second period comprises a first period in which a signal can be transmitted and a third period in which the radio terminal is not needed to perform the signal measurement, the first period occurs periodically at a periodicity of the second period, and the third period follows the first period; and an offset value to indicate a subframe number and a System Frame Number (SFN) at which the first period is started; and transmitting, to the master base station on the licensed frequency, a result of the signal measurement which is performed within the first period. ### Claim 12 (depends on 11) The method of the radio terminal according to claim 11, wherein the signal measurement includes a Received Signal Strength Indicator (RSSI) measurement. ### Claim 13 (depends on 11) The method of the radio terminal according to claim 11, wherein the signal measurement includes at least one of a Received Signal Received Power (RSRP) measurement and a Received Signal Received Quality (RSRQ) measurement. ### Claim 14 (depends on 11) The method of the radio terminal according to claim 11, wherein the signal includes a discovery signal.