# US 2017/0289912 A1 · Communication control method for communication terminal device, and communication terminal device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0289912 A1 - Document ID: US20170289912A1 - Status: Published application - Kind: A1 - Application number: 15/510,757 - Filed: 2015-09-29 - Published: 2017-10-05 - Earliest claimed: 2014-10-30 - Assignees: Hitachi Kokusai Electric Inc. - Applicants: Hitachi Kokusai Electric Inc. - Inventors: Takahito ISHII; Takekazu YOSHINAGA - Web page: https://patentgrep.com/patent/US20170289912A1 ## CPC - H04W 52/0235: {where the received signal is a power saving command} - H04B 1/40: Circuits - H04L 1/00: Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} - H04L 1/22: using redundant apparatus to increase reliability - H04M 1/73: Battery saving arrangements - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 52/0274: {by switching on or off the equipment or parts thereof} - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04L 1/20: using signal quality detector - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract In a communication control method for a communication terminal device including a plurality of communication units corresponding to different communication schemes or communication systems to perform communication in parallel, when a first communication unit performs transmission, transmission/reception of another communication unit is stopped. Then, a transmission/reception stop duration of the another communication unit is set to be equal to or less than a predetermined number of synchronization protection stages. ## Claims ### Claim 1 A communication control method for a communication terminal device including a plurality of communication units corresponding to different communication schemes or communication systems to perform communication in parallel, the method comprising: when a first communication unit performs transmission, stopping transmission/reception of another communication unit; and setting a transmission/reception stop duration of the another communication unit to be equal to or less than a predetermined number of synchronization protection stages. ### Claim 2 (depends on 1) The communication control method of claim 1, further comprising: determining a presence or absence of a transmission stop frame of the another communication unit; calculating an estimated frame error rate of the another communication unit; comparing the estimated frame error rate with a predetermined value; and prohibiting a transmission/reception stop of the another communication unit when the estimated frame error rate exceeds the predetermined value. ### Claim 3 (depends on 1) The communication control method of claim 1, further comprising: determining that the another communication unit is in an intermittent transmission/reception state in a standby state; prohibiting the transmission/reception stop when the another communication unit starts intermittent transmission/reception; and permitting the transmission/reception stop again when the another communication unit ends the intermittent transmission/reception. ### Claim 4 (depends on 1) The communication control method of claim 1, further comprising: transmitting radio waves by the plurality of communication units; performing conversion from a radio frequency signal into a baseband signal, or conversion from a baseband signal into a radio frequency signal; performing a baseband demodulation process or a data decoding process; performing a data encoding process for transmitting data to network; separating control data and user data in data communication with an outside; turning transmission/reception ON/OFF by a control signal from the outside; and outputting a communication unit OFF prohibition signal to the outside. ### Claim 5 A communication control method for a communication terminal device including a plurality of communication units corresponding to different communication schemes or communication systems to perform communication in parallel, the method comprising: when a first communication unit performs transmission, stopping transmission/reception of another communication unit. ### Claim 6 (depends on 1) A communication terminal device comprising a plurality of communication units corresponding to different communication schemes or communication systems and a control unit, wherein each of the communication units includes an antenna unit, a radio unit, a baseband unit, an external interface unit, and a communication control unit, and wherein the communication terminal device operates in the communication control method of the communication terminal device according to claim 1. ### Claim 7 A communication terminal device including a plurality of communication units corresponding to different communication schemes or communication systems to perform communication in parallel, wherein a first communication unit stores in advance a radio unit OFF time which is within an out-of-synchronization time until a second communication unit causes out-of-synchronization due to continuous radio unit OFF, and upon detecting its own data transmission timing, the first communication unit outputs a radio unit OFF signal, for allowing a radio unit of the second communication unit to stop transmission/reception, at the data transmission timing in the radio unit OFF time which is within the out-of-synchronization time, and wherein the radio unit of the second communication unit stops transmission/reception of the radio unit by the radio unit OFF signal. ### Claim 8 (depends on 7) The communication terminal device of claim 7, wherein upon receiving the radio unit OFF signal from the first communication unit, the second communication unit calculates an estimated frame error rate, compares the estimated frame error rate with a predetermined value, and outputs a stop instruction of the radio unit OFF signal to the first communication unit when the estimated frame error rate exceeds a predetermined value. ### Claim 9 (depends on 7) The communication terminal device of claim 7, wherein upon receiving the radio unit OFF signal from the first communication unit, the second communication unit determines whether the communication unit is in an intermittent transmission/reception state in a standby state, and when the communication unit is in the intermittent transmission/reception state, the second communication unit outputs a stop instruction of the radio unit OFF signal at the start of intermittent transmission/reception, and stops the output of the stop instruction of the radio unit OFF signal at the end of intermittent transmission/reception. ### Claim 10 (depends on 8) The communication terminal device of claim 8, wherein upon receiving the radio unit OFF signal from the first communication unit, the second communication unit determines whether the communication unit is in an intermittent transmission/reception state in a standby state, and when the communication unit is in the intermittent transmission/reception state, the second communication unit outputs a stop instruction of the radio unit OFF signal at the start of intermittent transmission/reception, and stops the output of the stop instruction of the radio unit OFF signal at the end of intermittent transmission/reception. ### Claim 11 (depends on 2) A communication terminal device comprising a plurality of communication units corresponding to different communication schemes or communication systems and a control unit, wherein each of the communication units includes an antenna unit, a radio unit, a baseband unit, an external interface unit, and a communication control unit, and wherein the communication terminal device operates in the communication control method of the communication terminal device according to claim 2. ### Claim 12 (depends on 3) A communication terminal device comprising a plurality of communication units corresponding to different communication schemes or communication systems and a control unit, wherein each of the communication units includes an antenna unit, a radio unit, a baseband unit, an external interface unit, and a communication control unit, and wherein the communication terminal device operates in the communication control method of the communication terminal device according to claim 3. ### Claim 13 (depends on 4) A communication terminal device comprising a plurality of communication units corresponding to different communication schemes or communication systems and a control unit, wherein each of the communication units includes an antenna unit, a radio unit, a baseband unit, an external interface unit, and a communication control unit, and wherein the communication terminal device operates in the communication control method of the communication terminal device according to claim 4. ### Claim 14 (depends on 5) A communication terminal device comprising a plurality of communication units corresponding to different communication schemes or communication systems and a control unit, wherein each of the communication units includes an antenna unit, a radio unit, a baseband unit, an external interface unit, and a communication control unit, and wherein the communication terminal device operates in the communication control method of the communication terminal device according to claim 5.