# US 2013/0281148 A1 · Wireless communication system, mobile station, base station and wireless communication method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0281148 A1 - Document ID: US20130281148A1 - Status: Published application - Kind: A1 - Application number: 13/925,329 - Filed: 2013-06-24 - Published: 2013-10-24 - Earliest claimed: 2010-12-28 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Takashi SEYAMA - Web page: https://patentgrep.com/patent/US20130281148A1 ## CPC - H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range} - H04W 52/243: {taking into account interferences} - H04W 52/30: using constraints in the total amount of available transmission power - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract In a wireless communication system capable of wireless communication by using multiple frequency bands at the same time, a mobile station includes an uplink transmitting unit, which transmits allowable power difference between frequency bands and limitation node information indicating an object of power limitation in transmission power control of the mobile station to a base station, and a transmission-power control unit, which controls transmission power on the basis of a TPC command received from the base station, and the base station includes a TPC-command generating unit, which generates a TPC command on the basis of the allowable power difference between frequency bands and the limitation mode information, and a transmitting unit, which transmits the TPC command to the mobile station. ## Claims ### Claim 1 A wireless communication system capable of wireless communication between a mobile station and a bass station by using multiple frequency bands at the same time, wherein the mobile station includes: an uplink transmitting unit that transmits allowable power difference between frequency bands and mode information indicating an object of power limitation in transmission power control of the mobile station to the base station; and a transmission-power control unit that controls transmission power on the basis of a transmission power control command received from the base station, and the base station includes: a generating unit that generates a transmission power control command on the basis of the allowable power difference between frequency bands and the mode information; and a downlink transmitting unit that transmits the transmission power control command to the mobile station. ### Claim 2 The wireless communication system according to claim. 1, wherein the object of power limitation is respective transmission power values of frequency bauds or respective power spectral densities of the transmission power values. ### Claim 3 (depends on 2) The wireless communication system according to claim 2, wherein when the object of power limitation is respective transmission power values of frequency bands, the generating unit of the base station performs power limitation so that difference in. transmission, power between the frequency bands is within the allowable power difference in comparison of the respective transmission power values, when the object of power limitation is respective power spectral densities of transmission power values of frequency bands, the generating unit performs power limitation so that difference in power spectral, density between the frequency bands is within the allowable power difference in comparison of the respective power spectral densities, and the generating unit generates a transmission power control command on the basis of a result of the power limitation, ### Claim 4 A wireless communication system, capable of wireless communication between a base station and a mobile station by using multiple frequency bands at the same time, wherein the base station includes: a generating unit that generates a transmission power control command; and a downlink transmitting unit that transmits the transmission power control command to the mobile station, and the mobile station includes: a receiving unit that receives a transmission power control command from the base station; and a transmission-power control unit that, when the receiving unit has received a transmission power control command, limits a power value subject to power limitation on the basis of allowable power difference between frequency bands, and controls transmission power on the basis of a result of the limiting process. ### Claim 5 (depends on 4) The wireless communication system according to claim 4, wherein the power value subject to power limitation is respective transmission power values of frequency bands or respective power spectral densities of the transmission power values. ### Claim 6 (depends on 5) The wireless communication system according to claim 5, wherein when the power value subject to power limitation is respective transmission power values of frequency bands, the transmission-power control unit of the mobile station limits the respective transmission power values so that difference in transmission power between the frequency bands is within the allowable power difference, and when the power value subject, to power limitation is respective power spectral densities of transmission power values of frequency bands, the transmission-power control unit converts transmission power values of frequency bands into power spectral densities, respectively, and limits the power spectral densities so that difference in power spectral density between the frequency bands is within the allowable power difference. ### Claim 7 A wireless communication system capable of wireless communication between a mobile station and a base station by using multiple frequency bands at the same time, wherein the mobile station, includes an uplink transmitting unit that transmits allowable power difference between frequency bands to the base station, the base station includes: a generating unit that generates a first transmission power control command corresponding to a first object of power limitation and a second transmission power control command corresponding to a second object of power limitation in parallel on the basis of the allowable power difference between frequency bands; and a downlink transmitting unit that transmits the first and second transmission power control commands generated by the generating unit to the mobile station, and the mobile station further includes; a receiving unit that receives the first and second transmission power control commands from the base station; and a transmission-power control unit that detects a desired transmission power control command corresponding to an object of power limitation in transmission power control of the mobile station from the first and second transmission power control commands, and controls transmission power on the basis of a result of the detection. ### Claim 8 (depends on 7) The wireless communication system according to claim 7, wherein the generating unit of the base station associates each transmission power control command with identification information for identifying the transmission power control command, and the transmission-power control unit of the mobile station detects she desired transmission power control command on the basis of known identification information that the mobile station and the base station have known in advance. ### Claim 9 (depends on 7) The wireless communication system according to claim 7, wherein the first object of power limitation is respective transmission power values of frequency bands, and the second object of power limitation is respective power spectral densities of the transmission, power values. ### Claim 10 (depends on 9) The wireless communication system according to claim 9, wherein the generating unit of the base station performs power limitation so that difference in transmission power is within the allowable power difference in comparison of the respective transmission power values of the frequency bands, and generates a first transmission power control command on the basis of a result of the power limitation, and the generating unit of the base station performs power limitation so that difference in power spectral density is within the allowable power difference in. comparison of the respective power spectral densities of the transmission power values of the frequency bands, and generates a second transmission power control command, on the basis of a result of the power limitation. ### Claim 11 A mobile station capable of transmitting and receiving radio signals by using multiple frequency bands at the same time, the mobile station comprising; a transmitting unit that transmits mode information indicating an object of power limitation in transmission power control of the mobile station to a base station; and a transmission-power control unit that controls transmission power on the basis of a transmission power control command received from the base station. ### Claim 12 (depends on 11) The mobile station according to claim 11, wherein the transmitting unit further transmits allowable power difference between frequency bands to the base station. ### Claim 13 (depends on 12) The mobile station according to claim 12, further comprising a receiving unit that receives a transmission power control command that the base station has generated on the basis of the allowable power difference between frequency bands and the mode information, ### Claim 14 (depends on 11) The mobile station according to claim 11, wherein the object of power limitation is respective transmission power values of frequency bands or respective power spectral densities of the transmission power values. ### Claim 15 A mobile station capable of transmitting and receiving radio signals by using multiple frequency bands at the same time, the mobile station comprising: a receiving unit that receives a transmission power control command from, a base station; and a transmission-power control unit that, when the receiving unit has received a transmission power control command, limits a power value subject to power limitation on the basis of allowable power difference between frequency bands, and controls transmission power on the basis of a result of the limiting process. ### Claim 16 (depends on 15) The mobile station according to claim 15, wherein the power value subject to power limitation is respective transmission power values of frequency bands or respective power spectral densities of the transmission power values. ### Claim 17 The mobile station according to claim ill wherein when the power value subject to power limitation is respective transmission power values of frequency bands, the transmission-power control unit limits the respective transmission power values so that difference in transmission power between the frequency bands is within the allowable power difference, and when the power value subject to power limitation is respective power spectral densities of transmission, power values of frequency bands, the transmission-power control unit converts transmission power values of frequency bands into power spectral densities, respectively, and limits the power spectral densities so that difference in power spectral density between the frequency bands is within the allowable power difference. ### Claim 18 A mobile station capable of transmitting and receiving radio signals by using multiple frequency bands at the same time, the mobile station comprising: a transmitting unit that transmits allowable power difference between frequency bands to a base station; a receiving unit that receives a first transmission power control command corresponding to a first object of power limitation and a second transmission power control command, corresponding to a second object of power limitation which have been generated in parallel by the base station on the basis of the allowable power difference between frequency bands; and a transmission-power control unit that detects a desired transmission power control command corresponding to an object of power limitation in transmission power control of the mobile station from the first and second transmission power control commands, and controls transmission power on the basis of a result of the detection. ### Claim 19 (depends on 18) The mobile station according to claim 18, wherein the transmission-power control unit detects the desired transmission power control command further on the basis of known identification information for identifying each transmission, power control command that the mobile station and the base station have known in advance. ### Claim 20 (depends on 18) The mobile station according to claim 18, wherein the object of power limitation in transmission power control of the mobile station is respective transmission power values of frequency bands or respective power spectral densities of the transmission power values. ### Claim 21 ft base station capable of transmitting and receiving radio signals by using multiple frequency bands at the same time, the base station comprising: a generating unit that generates a transmission power control command, on the basis of allowable power difference between frequency bands and mode information indicating an object of power limitation in transmission power control of a mobile station that the mobile station transmits; and a transmitting unit that transmits the transmission power control command to the mobile station. ### Claim 22 A base station capable of transmitting and receiving radio signals by using multiple frequency bands at the same time, the base station comprising: a generating unit that generates a first transmission power control command corresponding to a first object of power limitation and a second transmission power control, command corresponding to a second object of power limitation in parallel on the basis of allowable power difference between frequency bands received from a mobile station; and a transmitting unit that transmits the first and second transmission power control, commands generated by the generating unit to the mobile station. ### Claim 23 A wireless communication method in a wireless communication system capable of wireless communication between a mobile station and a base station by using multiple frequency bands at the same time, the wireless communication method comprising: the mobile station transmitting allowable power difference between frequency bands and mode information indicating an object of power limitation in transmission power control of the mobile station to the base station; the base station generating a transmission power control command on the basis of the allowable power difference between frequency bands and the mode information and transmitting the transmission power control command to the mobile station; and the mobile station controlling transmission power on the basis of the transmission power control command received from the base station. ### Claim 24 A wireless communication method in a wireless communication system capable of wireless communication between a mobile station and a base station by using multiple frequency bands at the same time, the wireless communication method comprising: the base station generating a transmission power control command and transmitting the transmission power control command to the mobile station; and when having received the transmission power control command from the base station, the mobile station limiting a power value subject to power limitation on the basis of allowable power difference between frequency bands and controlling transmission power on the basis of a result of the limiting process. ### Claim 25 A wireless communication method in a wireless communication system capable of wireless communication between a mobile station and a base station by using multiple frequency bands at the same time, the wireless communication method comprising: the mobile station transmitting allowable power difference between frequency bands to the base station; the base station generating a first transmission power control command corresponding to a first object of power limitation and a second transmission power control command corresponding to a second object of power limitation in parallel on the basis of the allowable power difference between frequency bands and transmitting the first and second transmission power control commands to the mobile station; and the mobile station receiving the first and second transmission power control commands from the base station, detecting a desired transmission power control command corresponding to an object of power limitation in transmission power control of the mobile station from the first and second transmission power control commands, and controlling transmission power on the basis of a result of the detection.