# US 2014/0192665 A1 · Measurement circuit, wireless communication device, and measurement method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192665 A1 - Document ID: US20140192665A1 - Status: Published application - Kind: A1 - Application number: 14/140,338 - Filed: 2013-12-24 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Chimato Koike - Web page: https://patentgrep.com/patent/US20140192665A1 ## CPC - H04B 17/328: {Reference signal received power [RSRP]; Reference signal received quality [RSRQ]} - H04B: TRANSMISSION ## Abstract A measurement circuit including: a memory, and a processor coupled to the memory and configured to measure a first signal strength of a received signal within a first frequency band, the received signal including a signal transmitted from a first transmitting apparatus within the first frequency band and a signal transmitted from a second transmitting apparatus within a second frequency band that constitutes a part of the first frequency band, to generate a second signal strength of the signal transmitted from the second transmitting apparatus within the second frequency band, and to generate a third signal strength of the received signal within the second frequency band based on the first signal strength and the second signal strength. ## Claims ### Claim 1 A measurement circuit comprising: a memory; and a processor coupled to the memory and configured to measure a first signal strength of a received signal within a first frequency band, the received signal including a signal transmitted from a first transmitting apparatus within the first frequency band and a signal transmitted from a second transmitting apparatus within a second frequency band that constitutes a part of the first frequency band, to generate a second signal strength of the signal transmitted from the second transmitting apparatus within the second frequency band, and to generate a third signal strength of the received signal within the second frequency band based on the first signal strength and the second signal strength. ### Claim 2 (depends on 1) The measurement circuit according to claim 1, wherein the processor is configured to measure a received power of a reference signal included in the signal transmitted from the second transmitting apparatus within the second frequency band, and the second signal strength is generated by the received power. ### Claim 3 (depends on 1) The measurement circuit according to claim 1, wherein the first transmitting apparatus is a serving base station of a terminal which includes the measurement circuit, and the second transmitting apparatus is a candidate of a target base station for handover performed by the terminal. ### Claim 4 (depends on 2) The measurement circuit according to claim 2, wherein the processor is configured to generate a received quality of the reference signal based on the third signal strength and the received power of the reference signal. ### Claim 5 (depends on 1) The measurement circuit according to claim 1, wherein the first signal strength is measured in a time domain. ### Claim 6 (depends on 1) The measurement circuit according to claim 1, wherein the processor is configured to generate the third signal strength without measuring the received signal within the second frequency band in a frequency domain. ### Claim 7 (depends on 1) The measurement circuit according to claim 1, wherein the processor is configured to generate the third signal strength by excluding an interference power for a third frequency band of the first frequency band other than the second frequency band, from the first signal strength based on the second signal strength. ### Claim 8 A wireless communication device comprising: an antenna configured to receive a signal including a signal transmitted from a first transmitting apparatus within a first frequency band and a signal transmitted from a second transmitting apparatus within a second frequency band that constitutes a part of the first frequency band; and a processor configured to measure a first signal strength of the received signal within the first frequency band, to generate a second signal strength of the signal transmitted from the second transmitting apparatus within the second frequency band, and to generate a third signal strength of the received signal within the second frequency band based on the first signal strength and the second signal strength. ### Claim 9 (depends on 8) The wireless communication device according to claim 8, wherein the processor is configured to measure a received power of a reference signal included in the signal transmitted from the second transmitting apparatus within the second frequency band, and the second signal strength is generated by the received power. ### Claim 10 (depends on 8) The wireless communication device according to claim 8, wherein the first transmitting apparatus is a serving base station of the wireless communication device, and the second transmitting apparatus is a candidate of a target base station for handover performed by the wireless communication device. ### Claim 11 (depends on 9) The wireless communication device according to claim 9, wherein the processor is configured to generate a received quality of the reference signal based on the third signal strength and the received power of the reference signal. ### Claim 12 (depends on 8) The wireless communication device according to claim 8, wherein the first signal strength is measured in a time domain. ### Claim 13 (depends on 8) The wireless communication device according to claim 8, further comprising: an analog circuit configured to perform analog processing for the received signal, the analog circuit including an analog filter with a frequency response characteristic and an analog to digital converter, wherein the processor is configured to calculate the third signal strength, by using a thermal noise of the analog circuit and the frequency response characteristic. ### Claim 14 A measurement method comprising: measuring a first signal strength of a received signal within a first frequency band, the received signal including a signal transmitted from a first transmitting apparatus within the first frequency band and a signal transmitted from a second transmitting apparatus within a second frequency band that constitutes a part of the first frequency band; generating a second signal strength of the signal transmitted from the second transmitting apparatus within the second frequency band; and generating a third signal strength of the received signal within the second frequency band based on the first signal strength and the second signal strength. ### Claim 15 (depends on 14) The measurement method according to claim 14, further comprising: measuring a received power of a reference signal included in the signal transmitted from the second transmitting apparatus within the second frequency band, and the second signal strength is generated by the received power. ### Claim 16 (depends on 14) The measurement method according to claim 14, wherein the first transmitting apparatus is a serving base station of a terminal which performs the measurement method, and the second transmitting apparatus is a candidate of a target base station for handover performed by the terminal. ### Claim 17 (depends on 15) The measurement method according to claim 15, further comprising: generating a received quality of the reference signal based on the third signal strength and the received power of the reference signal. ### Claim 18 (depends on 14) The measurement method according to claim 14, wherein the first signal strength is measured in a time domain. ### Claim 19 (depends on 14) The measurement method according to claim 14, wherein the third signal strength is generated without measuring the received signal within the second frequency band in a frequency domain. ### Claim 20 (depends on 14) The measurement method according to claim 14, wherein the third signal strength is generated by excluding an interference power for a third frequency band of the first frequency band other than the second frequency band, from the first signal strength based on the second signal strength.