Abstract

A detector included in a radio station detects a signal level, at a designated transmission frequency, of a real signal obtained as a result of digitally converting an electric signal derived from a radio wave captured by an antenna by applying a time window specified according to a length of time of a beacon used in wireless communication to the real signal. A determiner determines whether a transmission band containing the transmission frequency is used for the wireless communication from the detected signal level.

IPC Classes  ?

• H04L 25/02 - Baseband systems Details
• H04L 5/00 - Arrangements affording multiple use of the transmission path

Abstract

A frequency selector included in a radio station selects a target frequency for carrier sensing from within a bandwidth of one of a plurality of subcarriers for a channel specified for wireless communication in accordance with Orthogonal Frequency Division Multiplexing, at least a portion of the bandwidth of the one of the subcarriers being within a transmission band. A detector detects a signal level, at the target frequency, of a real signal obtained as a result of digitally converting an electric signal derived from a radio wave captured by an antenna. A determiner determines whether the transmission band is used for the wireless communication from the signal level.

IPC Classes  ?

• H04L 5/00 - Arrangements affording multiple use of the transmission path

Abstract

In a wireless device that can easily change a volume depending on whether a hands-free call function of the wireless device is on or off. The wireless device provided with a volume knob that changes the volume value according to the rotation angle of the knob, a volume change key that changes the volume value by pressing the key, and a hands-free call function on/off switching key that turns the hands-free call function on and off, and a controller for controlling the wireless device. The controller monitors whether the hands-free call function is on or off, and when the hands-free call function is on, the volume can be changed by operating the volume knob, and when the hands-free call function is off, the volume can be changed by operating the volume change key.

IPC Classes  ?

• H04M 1/72466 - User interfaces specially adapted for cordless or mobile telephones with selection means, e.g. keys, having functions defined by the mode or the status of the device
• H04M 1/60 - Substation equipment, e.g. for use by subscribers including speech amplifiers

Abstract

A radio device includes: a plurality of operation terminals each of which is provided with a unique ID and each of which is configured to perform an operation related to a task for digital selective calling (DSC) communication; an ID changing section configured to, when one of the plurality of operation terminals is selected, (i) change the ID of the operation terminal selected to a high-priority ID indicating that the operation terminal selected is allowed to preferentially perform the DSC operation and (ii) change the IDs of the other operation terminals unselected among the plurality of operation terminals to non-high-priority identifiers other than the high-priority ID; and an execution section configured to accept an operation performed by the operation terminal provided with the high-priority ID and execute the task.

IPC Classes  ?

• H04W 76/11 - Allocation or use of connection identifiers
• H04W 72/56 - Allocation or scheduling criteria for wireless resources based on priority criteria

Abstract

A switching device includes: a transmission path configured to transmit a transmission signal; a reception path configured to transmit a reception signal; a main-path switching part configured to perform switching of paths so as to connect one of two radio devices to the transmission path and connect the other of the two radio devices to the reception path; and a command output section configured to output a permission command that permits the radio device connected to the transmission path to perform transmission and configured to output a prohibition command that prohibits the radio device connected to the reception path from performing transmission.

IPC Classes  ?

• H04B 1/44 - Transmit/receive switching
• H04B 7/06 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
• H04B 7/08 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Abstract

A frequency control assist device is configured to: calculate an average value of pulse numbers each of which is a pulse number of a reference signal generated by an oscillator in one cycle of a PPS signal generated based on a GPS signal, from a total of the pulse numbers counted for a time period whose length is a predetermined number times the one cycle, the average value being an average value of the pulse numbers each for the one cycle; and every time a deviation between a specified value of a reference frequency of the reference signal and the average value falls below a target value, reduce the target value from the current value and increase, from the current value, the predetermined number that specifies the time period for obtaining the total of the pulse numbers from which the average value is to be calculated by an averaging circuit.

IPC Classes  ?

• G04R 40/06 - Correcting the clock frequency by computing the time value implied by the radio signal

Goods & Services

Communication equipment, namely repeaters and transceivers for amateur radio communications.

Abstract

Provided is a communication system that enables smooth wireless communication. A communication system (1) includes a communication terminal (20) and a microphone (10) connected to each other. The microphone includes a microphone element (11) which converts a voice to an electric signal and a PTT switch (12) which switches between transmitting or not transmitting the electric signal to the communication terminal. The communication terminal includes a VOX determination section (232) and an operation sound determination section (233), each of which determines a level of the electric signal, and a transmission control section (234) which controls transmission of the electric signal in accordance with the level.

IPC Classes  ?

• H04M 1/72409 - User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
• G06F 3/16 - Sound inputSound output
• H04M 1/60 - Substation equipment, e.g. for use by subscribers including speech amplifiers
• H04R 3/04 - Circuits for transducers for correcting frequency response

Goods & Services

Polo shirts; shirts for suits; short-sleeve shirt; shirts; tee-shirts; aprons [clothing]; caps being headwear; hats; headwear; footwear; masquerade costumes; clothing for sports.

Abstract

A gateway device (30) relays voice communication between a communication terminal to be connected to a closed network (10) and a communication terminal to be connected to a LAN (20). The gateway device (30) includes a closed network communicator (31) connected to the closed network (10), a communication relay (32) to perform encapsulation or decapsulation of data for enabling voice communication between the closed network (10) and the LAN (20), and a LAN communicator (33) connected to the LAN (20).

IPC Classes  ?

• H04L 12/66 - Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• H04W 88/16 - Gateway arrangements

Goods & Services

Alcoholmeters; thermometers not for medical purposes; electronic carbon dioxide monitors, other than for medical purposes; carbon dioxide detectors; measuring or testing machines and instruments; battery chargers; AC adapters; electrical adapters; power distribution or control machines and apparatus; solar batteries; batteries and cells; electric or magnetic meters and testers; USB cables; telecommunication cables; electric wires and cables; antennas [aerials]; loudspeakers; earphones; microphones; bone conduction earphones; network routers; conference phones; local area network [LAN] access points; radio repeaters; portable radio communication machines and apparatus; aeronautical radio communication machines and apparatus; vehicular radio communication machines and apparatus; marine radio communication machines and apparatus; radio communication machines and apparatus; radio machines and apparatus; parts and accessories for telecommunication machines and apparatus; telecommunication machines and apparatus; headsets; computer network hubs; webcams; personal digital assistants; communication hubs; computer peripheral devices; computer hardware; computer networking hardware; computer programs.

Goods & Services

Alcoholmeters; thermometers not for medical purposes; electronic carbon dioxide monitors, other than for medical purposes; carbon dioxide detectors; battery chargers; AC power adapters; electrical adapters; solar batteries; batteries; electric or magnetic meters and testers, namely, phase indicators, antenna parameter measuring apparatus, frequency meters, voltmeters, ammeters, wattmeters, and ohmmeters; USB cables; telecommunication cables; electric wires and cables; antennas; aerial antennas; loudspeakers; earphones; microphones; bone conduction earphones; network routers; conference phones; local area network (LAN) access points; radio repeaters; portable radio communication machines and apparatus, namely, radios, radiotelephones, radio transceivers, radio receivers, radio transmitters, and radio signal tuners; aeronautical radio communication machines and apparatus; vehicular radio communication machines and apparatus, namely, radios, radiotelephones, radio transceivers, radio receivers, radio transmitters, and radio signal tuners; marine radio communication machines and apparatus; radio communication machines and apparatus, namely, radios, radiotelephones, radio transceivers, radio receivers, radio transmitters, and radio signal tuners; radio machines and apparatus, namely, radios, radiotelephones, radio transceivers, radio receivers, radio transmitters, and radio signal tuners; structural parts and accessories for telecommunication machines and apparatus; telecommunication machines and apparatus, namely, radios, radiotelephones, radio transceivers, radio receivers, radio transmitters, and radio signal tuners; headsets; computer network hubs; webcams; personal digital assistants; communication hubs; computer peripheral devices; computer hardware; computer networking hardware; downloadable computer programs for communicating with radio communication machines and apparatus; recorded computer programs for communicating with radio communication machines and apparatus; downloadable computer programs for operating radio communication machines and apparatus; recorded computer programs for operating radio communication machines and apparatus

Goods & Services

Alcoholmeters; thermometers not for medical purposes; electronic carbon dioxide monitors, other than for medical purposes; carbon dioxide detectors; measuring or testing machines and instruments; battery chargers; ac adapter; electrical adapters; power distribution or control machines and apparatus; solar batteries; batteries and cells; electric or magnetic meters and testers; usb cables; telecommunication cables; electric wires and cables; antennas [aerials]; loudspeakers; earphones; microphones; bone conduction earphones; network routers; conference phones; local area network [lan] access points; radio repeaters; portable radio communication machines and apparatus; aeronautical radio communication machines and apparatus; vehicular radio communication machines and apparatus; marine radio communication machines and apparatus; radio communication machines and apparatus; radio machines and apparatus; parts and accessories for telecommunication machines and apparatus; telecommunication machines and apparatus; headsets; computer network hubs; webcams; personal digital assistants; communication hubs; computer peripheral devices; computer hardware; computer networking hardware; computer programs.

Abstract

Provided is a voice communication system that notifies a terminal device of transmission restriction information when the number of received voice signals reaches a predetermined number. A server device continuously counts the number of simultaneously received voice signals. A first terminal device transmits, to the server device, a voice signal with identification information of a second terminal device. The server device transfers, to the second terminal device, the voice signal transmitted from the first terminal device. However, when the number of simultaneous receptions of the voice signals reaches a predetermined restriction value, the server device transfers, to the second terminal device, the received voice signal with transmission restriction information attached thereto. The second terminal device does not transmit a voice signal, even if a user performs a transmission operation, during reception of the voice signal with the attached transmission restriction information.

IPC Classes  ?

• H04W 4/10 - Push-to-talk [PTT] or push-on-call services
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04L 65/4061 - Push-to services, e.g. push-to-talk or push-to-video
• H04M 3/36 - Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Abstract

This invention realizes a communication system that enables smooth wireless communication. A communication system (1) includes a communication terminal (20) and a microphone (10) connected to each other. The microphone comprises: a microphone element (11) that converts speech to electric signals; and a PTT switch (12) that switches whether to transmit the electric signals to the communication terminal. The communication terminal comprises: a VOX determination unit (232) and an operation sound determination unit (233) that determine the level of the electric signals; and a transmission control unit (234) that controls the transmission of the electric signals according to the level thereof.

IPC Classes  ?

• H04M 1/00 - Substation equipment, e.g. for use by subscribers

Goods & Services

Transceivers; Walkie-talkies; Marine-band transceivers; Wireless transceivers; Marine radio communication machines and apparatus

Abstract

There is provided a relay apparatus that enables a communication voice of a specific communication terminal to be tracked and recorded. A call from a communication terminal results in establishment of a communication session in which the calling communication terminal and a called communication terminal are regarded as participating terminals. Transmission of a voice signal from any of the participating terminals in the established communication session allows the voice signal to be transmitted, together with session information, to the other participating terminal in the same communication session. A virtual device is associated with the communication terminal, and the communication terminal and the virtual device establish a virtual communication session. In the virtual communication session, the voice signal transmitted from the communication session to the virtual device is recorded in a communication monitor.

IPC Classes  ?

• H04W 4/16 - Communication-related supplementary services, e.g. call-transfer or call-hold
• H04B 7/15 - Active relay systems
• H04M 1/656 - Recording arrangements for recording conversations
• H04W 76/10 - Connection setup

Abstract

A wireless system includes a control device and a wireless communication device. The control device switches between a control-side access point mode and a control-side station mode. In the control-side access point mode, the control device receives a connection request from the wireless communication device to establish a connection and, in the control-side station mode sends a connection request to the wireless communication device to establish a connection. The control device sends a sleep command or a wake-up command to the wireless communication device with which the connection is established.

IPC Classes  ?

• H04W 52/02 - Power saving arrangements
• H04W 4/80 - Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• H04L 1/00 - Arrangements for detecting or preventing errors in the information received
• H04W 84/12 - WLAN [Wireless Local Area Networks]

Abstract

A server system including a plurality of servers achieves redundancy on a per process basis. A first server and a second server execute a plurality of processes in parallel. Processes (B1-1, B2-1, and Br-1) in the first server are active processes, and processes (B1-2, B2-2, and Br-2) in the second server are standby processes. The active process periodically transmits an operation notification notifying normal operation, to the standby process. When no longer receiving an operation notification from the active process, the standby process switches an operation mode of the standby process from a standby mode to an active mode and starts provision of service of the process. The process switching is performed on a per process basis instead of on a per server basis.

IPC Classes  ?

• H04L 65/1046 - Call controllersCall servers
• H04L 67/10 - Protocols in which an application is distributed across nodes in the network

Abstract

Provided is a server system robust against a communication path failure. A first server system 2-1 and a second server system 2-2 are respectively installed on a first network 3-1 and a second network 3-2 provided by common carriers different from each other. The first and second server systems are connected to each other by a dedicated line 6. Even when a failure occurs in the first network, communication through the second network can be maintained, and even when a failure occurs in the second network, communication through the first network can be maintained. Further, when a failure occurs in the dedicated line, operations can be performed within each of the first and second networks in a degeneracy mode.

IPC Classes  ?

• H04M 1/24 - Arrangements for testing
• H04M 3/08 - Indicating faults in circuits or apparatus
• H04M 3/22 - Arrangements for supervision, monitoring or testing
• H04L 65/1046 - Call controllersCall servers
• H04L 41/0668 - Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
• H04L 43/0811 - Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
• H04L 65/1069 - Session establishment or de-establishment

Abstract

c) configured to set a transmission output power value for communication performed on a conversation channel by the DSC communication section to a value corresponding to a distance, which is calculated based on the information, between the communication device and a communication target vessel.

IPC Classes  ?

• H04W 52/02 - Power saving arrangements

Abstract

A communication device includes: a display section; an AIS receiving section configured to receive automatic identification system (AIS) information; a list creating section configured to create, based on the AIS information about vessels existing in the vicinity of the communication device, a proximity order list in which pieces of specific information for identifying the vessels are arranged in increasing order of proximity to the communication device; and a display control section configured to, when the submersion of the communication device has been detected, control the display section so that the display section displays the proximity order list and so that any one of the pieces of specific information at the top of the proximity order list is in a selected state.

IPC Classes  ?

• H04W 4/021 - Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
• H04W 4/029 - Location-based management or tracking services

Abstract

A gateway device (30) relays voice communications between a communication terminal connected to a closed network (10) and a communication terminal connected to a LAN (20). The gateway device (30) is provided with: a closed network communication unit (31) connected to the closed network (10); a communication relay unit (32) which performs encapsulation or decapsulation of data for enabling voice communication between the closed network (10) and the LAN (20); and a LAN communication unit (33) connected to the LAN (20).

IPC Classes  ?

• H04L 12/66 - Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• H04M 11/00 - Telephonic communication systems specially adapted for combination with other electrical systems
• H04W 84/12 - WLAN [Wireless Local Area Networks]
• H04W 88/16 - Gateway arrangements

Goods & Services

Radio repeaters; portable radio communication machines and apparatus; aeronautical radio communication machines and apparatus; vehicular radio communication machines and apparatus; marine radio communication machines and apparatus; radio communication machines and apparatus; radio machines and apparatus; telecommunication machines and apparatus; parts and accessories for telecommunication machines and apparatus; personal digital assistants; computer programs.

Abstract

[Problem] Provided is a relaying device that can track and record a communicated voice of a specific communication terminal using a mixing function of the relaying device. [Solution] When a communication terminal has made a call, a communication session in which the communication terminal that has made a call and a communication terminal that has been called are participating terminals is established. When a voice signal is transmitted from one participating terminal of the established communication session, this voice signal is transmitted to the other participating terminal(s) of the same communication session along with session information. A virtual device is associated with a communication terminal, and is registered in a communication session in which the communication terminal participates as a participating terminal together with the communication terminal. A communication monitoring unit records a voice signal transmitted to the virtual device from the communication session.

IPC Classes  ?

• H04M 3/42 - Systems providing special services or facilities to subscribers
• H04L 65/1073 - Registration or de-registration
• H04L 65/403 - Arrangements for multi-party communication, e.g. for conferences
• H04M 3/53 - Centralised arrangements for recording incoming messages
• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Abstract

[Problem] Provided is a relaying device that can track and record a communicated voice of a specific communication terminal using a mixing function of the relaying device. [Solution] When a communication terminal has sent a call packet to call another at least one communication terminal, a communication session in which this communication terminal that has made a call and a communication terminal that has been called are participating terminals is established. In the communication session, voice communication is relayed by transferring a voice signal which is transmitted from the participating terminals to another at least one communication terminal. A virtual device is registered as a participating terminal of the communication session and the voice signal which is transmitted from the communication session to the virtual device is recorded in the relaying device.

IPC Classes  ?

• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04M 3/22 - Arrangements for supervision, monitoring or testing
• H04M 7/12 - Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal

Abstract

[Problem] When a communication apparatus that is the communication partner is called via a relay device, the transmission control mode of a voice signal can be switched according to the capability of the communication partner. [Solution] A relay device (2) includes a telephone relay unit (3), a network communication relay unit (4), and a wireless communication relay unit (5). The wireless communication relay unit (5) includes a plurality of external apparatus interfaces, and an analog repeater (25), a digital repeater (27), or the like is connected to each external apparatus interface. If an SIP telephone (20) has called an analog transceiver (27), the relay device (2) obtains the address and apparatus type of the analog transceiver (27) from call information, and transmits a voice signal to the analog transceiver (27) using a transmission control mode (VOX mode) that suits the analog transceiver (27).

IPC Classes  ?

• H04L 65/65 - Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• H04L 65/75 - Media network packet handling
• H04L 65/1045 - Proxies, e.g. for session initiation protocol [SIP]
• H04L 65/1104 - Session initiation protocol [SIP]

Goods & Services

Radio repeaters; portable radio communication machines and apparatus; aeronautical radio communication machines and apparatus; vehicular radio communication machines and apparatus; marine radio communication machines and apparatus; radio communication machines and apparatus; radio machines and apparatus; telecommunication machines and apparatus; parts and accessories for telecommunication machines and apparatus; personal digital assistants; computer programs.

Goods & Services

radio repeaters; portable radio communication machines and apparatus; aeronautical radio communication machines and apparatus; vehicular radio communication machines and apparatus; marine radio communication machines and apparatus; radio communication machines and apparatus; radio machines and apparatus, namely radiotelephones, transceivers, IP transceivers, wireless LAN transceivers, cellular network transceivers; telecommunication machines and apparatus, namely radiotelephones, transceivers, IP transceivers, wireless LAN transceivers, cellular network transceivers; parts and accessories for telecommunication machines and apparatus, namely, microphones, audio speakers, headphones, batteries, battery packs, battery chargers, power supplies, amplifiers, transmitters, modulators, demodulators, remote controllers for transceivers, antennas, antenna tuners, headsets, wireless headsets, switches, alarms, electrical connectors, mounting brackets adapted for transceivers, mounting bases adapted for transceivers and straps adapted for transceivers; personal digital assistants; downloadable computer programs for communicating with radio communication machines and apparatus; recorded computer programs for communicating with radio communication machines and apparatus; downloadable computer programs for operating radio communication machines and apparatus; recorded computer programs for operating radio communication machines and apparatus

Abstract

A wireless station includes at least one oscillator to output a reference signal, and an error calculator to calculate a frequency of the reference signal and calculate a frequency error by subtracting a target frequency of the reference signal from the calculated frequency of the reference signal. The wireless station further includes a modulation data generator to generate modulation data by adding a correction value, varying in negative correlation with the frequency error calculated by the error calculator, to data to be transmitted, and a modulator to conduct frequency modulation on the basis of the modulation data and the reference signal.

IPC Classes  ?

• H03D 3/22 - Demodulation of angle-modulated oscillations by detecting phase difference between two signals obtained from input signal by means of active elements with more than two electrodes to which two signals are applied derived from the signal to be demodulated and having a phase difference related to the frequency deviation, e.g. phase detector
• H04L 27/22 - Demodulator circuitsReceiver circuits
• H04L 7/00 - Arrangements for synchronising receiver with transmitter

Abstract

[Problem] To provide a voice communication system that notifies a terminal device of transmission restriction information when the number of received voice signals reaches a prescribed number. [Solution] A server device continuously counts the number of simultaneously received voice signals. A first terminal device transmits, to the server device, a voice signal with identification information of a second terminal device. The server device transfer, to the second terminal device, the voice signal transmitted from the first terminal device. However, when the number of simultaneously received signals reaches a prescribed restriction value, the server device transfers, to the second terminal device, the received voice signal with transmission restriction information attached thereto. The second terminal device does not transmit the voice signal, even if a user performs a transmission operation, during reception of the voice signal with the attached transmission restriction information.

IPC Classes  ?

• H04M 3/22 - Arrangements for supervision, monitoring or testing
• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04L 12/833 - Marking packets or altering packet priority upon congestion or for congestion prevention

Abstract

Provided is a method for, upon transmission of a DSC message being instructed, enabling quick start of the transmission. The method includes; (1) instructing, upon transmission of the DSC message being instructed, an antenna tuner to start tuning regardless of whether being busy or not, and switching an antenna from reception to transmission after the tuning is completed, (2) performing busy check, and standing by for a time period defined in the standard, when a reception signal in a transmission channel is no longer a dot pattern, and executing these processes (1) and (2) in parallel.

IPC Classes  ?

• H04W 74/08 - Non-scheduled access, e.g. ALOHA
• H04B 1/00 - Details of transmission systems, not covered by a single one of groups Details of transmission systems not characterised by the medium used for transmission
• H04B 1/44 - Transmit/receive switching

Abstract

A charging holder for electronic devices is shared for a plurality of electronic devices having different thickness, and is stably fixed even under vibration conditions. The holder has a holder body, a rotation block and a lock unit. A pocket for inserting an electronic device is formed in the holder body. The rotation block is rotated and biased so that a tip portion can protrude inside the pocket, and has a contact terminal which can contact a charging terminal of the electronic device. The lock unit is for locking the upper side of the electronic device to the holder body when the electronic device is pushed into the pocket and rotated. The rotation block is configured so that the lower part of the electronic device can be inserted therein, holds the lower part of the electronic device regardless of the thickness of the electronic device.

IPC Classes  ?

• H01M 10/46 - Accumulators structurally combined with charging apparatus
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• B60R 11/02 - Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the likeArrangement of controls thereof

Abstract

[Problem] To provide a relay device which makes it possible to track and record communication voice of a specific communication terminal. [Solution] When there is a call from a communication terminal, this relay device establishes a communication session involving a calling communication terminal and a called communication terminal as participating terminals. When a voice signal is transmitted from a participating terminal in the established communication session, the relay device transmits the voice signal together with session information to another participating terminal in the same communication session. The relay device associates a virtual device with a communication terminal, and establishes a virtual communication session using the communication terminal and the virtual device. In the virtual communication session, the relay device records a voice signal transmitted from the communication session to the virtual device by a communication monitor unit.

IPC Classes  ?

• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04M 11/10 - Telephonic communication systems specially adapted for combination with other electrical systems with dictation recording and playback systems

Abstract

[Problem] To achieve redundancy in process units, using a server system having a plurality of servers. [Solution] A first server and a second server execute a plurality of processes in parallel. First server processes (B1-1, B2-1, Br-1) are operating processes and second server processes (B1-2, B2-2, Br-2) are standby processes. The operating processes regularly send operation notifications that notify normal operation, to the standby processes. If operation notifications are no longer received from the operating processes, the standby processes switch their own operation mode from standby mode to operate mode and start providing the services for those processes. The switching of these processes occur in process units, not server units.

IPC Classes  ?

• H04L 12/703 - Route fault prevention or recovery, e.g. rerouting, route redundancy, virtual router redundancy protocol [VRRP] or hot standby router protocol [HSRP]
• G06F 11/07 - Responding to the occurrence of a fault, e.g. fault tolerance
• G06F 11/20 - Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements

Abstract

[Problem] To make a server system robust against failure in a communication path. [Solution] A first server system 2-1 and a second server system 2-2 are installed on a first network 3-1 and a second network 3-2 of different communication carriers, respectively. These first and second server systems are connected to each other by a dedicated line 6. Even if failure occurs in the first network, it is possible to maintain communication through the second network, and even if failure occurs in the second network, it is possible to maintain communication through the first network. Furthermore, if failure occurs in the dedicated line, it is possible to perform operation in a degeneration mode in each of the first and the second networks.

IPC Classes  ?

• H04M 3/00 - Automatic or semi-automatic exchanges

Goods & Services

Wireless communications equipment; transceivers; walkie-talkies; communication receivers; radio frequency receivers; radiotelephones; marine-band transceivers; wireless communications equipment for marine-band; radios; marine radio communication machines and apparatus.

Abstract

A signal processing device includes an A-D converter and a controller. The A-D converter converts an analog signal to a digital signal in which portions where the amplitude exceeds a predetermined range are clipped. A counter of the controller calculates, for the digital signal, a number of clipped samples for each predetermined number of period samples. A frequency converter performs frequency conversion of the digital signal. An LPF removes high frequency components of the digital signal. A rate converter converts a sampling rate of the A-D converter. A digital amplifier amplifies and outputs the digital signal. An amplification factor adjuster multiplies a preset amplification factor of the digital amplifier by an amplification factor adjustment coefficient based on a ratio of the number of regular samples to the number of period samples, to adjust the amplification factor.

IPC Classes  ?

• H03M 1/18 - Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging
• H03M 1/66 - Digital/analogue converters
• H04B 1/10 - Means associated with receiver for limiting or suppressing noise or interference
• H03F 3/68 - Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
• H04L 27/26 - Systems using multi-frequency codes

Abstract

A wireless communication device converts a signal component, which has one of distributed frequency bands in an analog RF signal and passes through one of a plurality of bandpass filters, into digital data with an AD converter that carries out undersampling. A sampling frequency of the AD converter is set so that frequencies which are integral multiples of a Nyquist frequency based on the sampling frequency do not fall within frequency bands of signal components which are of the RF signal and are to pass through the respective plurality of bandpass filters.

IPC Classes  ?

• H03M 1/48 - Servo-type converters
• H03M 1/12 - Analogue/digital converters
• H03M 1/06 - Continuously compensating for, or preventing, undesired influence of physical parameters

Abstract

[Problem] Provided is a relay device that can internally record communication voice by use of a mixing function of the relay device. [Solution] Upon reception, from a communication terminal, of a call packet for calling another communication terminal, a communication session is established with the calling communication terminal and the called communication terminal as participating terminals. In the communication session, communication is relayed by transferring an audio signal transmitted from a participating terminal to the other participating terminal. A virtual device is registered as a participating terminal of the communication session, and an audio signal addressed and transmitted to the virtual device from the communication session is recorded inside the device.

IPC Classes  ?

• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04M 3/00 - Automatic or semi-automatic exchanges
• H04M 3/42 - Systems providing special services or facilities to subscribers

Abstract

[Problem] To provide a relay device configured such that a mixing function of the relay device can be used to track and record the communication audio of a specific communication terminal. [Solution] When there is a call from a communication terminal, a communication session is established with the calling communication terminal and a called communication terminal being participating terminals. When an audio signal is sent from a participating terminal of the established communication session, the audio signal is transmitted together with session information to the other participating terminal of the same communication session. A virtual device is associated with the communication terminal and is registered together as a participating terminal in the communication session in which the communication terminal is participating. A communication monitor records an audio signal transmitted from the communication session to the virtual device.

IPC Classes  ?

• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04M 3/53 - Centralised arrangements for recording incoming messages

Abstract

[Problem] To enable a voice signal transmission control system to be switched in accordance with the function of a communication partner when calling a communication device of the communication partner across a relay apparatus. [Solution] A relay apparatus 2 is provided with a telephone relaying unit 3, a network communication relaying unit 4, and a wireless communication relaying unit 5. The wireless communication relaying unit 5 is provided with a plurality of external device interfaces, and an analog repeater 25, a digital repeater 27, or the like is connected to each of the external device interfaces. When a call is issued from an SIP telephone 20 to an analog transceiver 27, the address and device type of the analog transceiver 27 are inferred from call information, and a voice signal is transmitted to the analog transceiver 27 by a transmission control system (VOX system) suited to the analog transceiver 27.

IPC Classes  ?

• H04M 3/00 - Automatic or semi-automatic exchanges
• H04M 3/42 - Systems providing special services or facilities to subscribers
• H04W 4/18 - Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Abstract

[Problem] To enable priority communication using a terminal device by setting a particular mode in the terminal device by user operation and thereby increasing a priority of the terminal device. [Solution] A server as a relay device, in forming a new session, compares the priority of an existing session with the priority of the new session, and, if the priority of the new session is higher than the priority of the existing session, removes a competing terminal device participating in the existing session from the existing session and makes the competing terminal device participate in the new session. Further, upon reception of a specific calling voice signal specifying the terminal device participating in the existing session as a communication partner from the terminal device set to a particular mode, the relaying device removes the terminal device participating in the existing session from the existing session and makes the terminal device participate in a session to be formed by the specific calling voice signal regardless of the priority of the session.

IPC Classes  ?

• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04N 7/15 - Conference systems
• H04L 29/06 - Communication control; Communication processing characterised by a protocol
• H04W 4/10 - Push-to-talk [PTT] or push-on-call services
• H04N 7/14 - Systems for two-way working

Abstract

[Problem] To provide a relaying device and a voice communication system with which calling and listening among a plurality of talk groups is possible. [Solution] The relaying device is provided with: a relaying device which stores a plurality of groups and terminal devices belonging to each of the groups, and, when a voice signal is received from one or more of the terminal devices (calling terminal devices), transfers the voice signal to the terminal devices other than the calling terminal device in the group to which the calling terminal device belongs; and the plurality of terminal devices which are connected to the relay device over a communication network. The relaying device also stores the master-slave relationship among the plurality of groups, transfers the voice signal to the terminal devices belonging to a master group if the group to which the calling terminal device belongs is a slave group, and transfers the voice signal to the terminal devices belonging to slave groups if the group to which the calling terminal device belongs is the master group.

IPC Classes  ?

• H04W 4/08 - User group management
• H04B 7/14 - Relay systems
• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04W 4/10 - Push-to-talk [PTT] or push-on-call services
• H04W 84/12 - WLAN [Wireless Local Area Networks]

Goods & Services

Wireless communication equipment, namely, radio repeaters, transceivers, mobile transceivers, and handheld transceivers.

Abstract

An angle calculator calculates, based on acceleration detected by an acceleration sensor, a tilt angle of a transceiver with respect to the vertical direction. A selector (i) selects a first audio filter to operate if the tilt angle is less than a threshold angle, or (ii) selects a second audio filter to operate if the tilt angle is equal to or greater than the threshold angle. The second audio filter has a lower cutoff frequency that is higher than the lower cutoff frequency of the first audio filter.

IPC Classes  ?

• H04R 3/04 - Circuits for transducers for correcting frequency response
• G01P 15/08 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration by making use of inertia forces with conversion into electric or magnetic values
• G06F 3/01 - Input arrangements or combined input and output arrangements for interaction between user and computer

Abstract

Upon reception of ACK via a communication IF, an allocator allocates a channel of a repeater to be controlled to communications between wireless terminals. A determination unit determines whether channels allocatable to the communications between the wireless terminals are short. When the determination unit has determined that the allocatable channels are short, a switching controller controls at least one repeater, among repeaters to be controlled by a repeater controller, that serves as a controlling repeater to cause the repeater to transmit, to a wireless terminal standing by in the channel of the repeater, a switching signal designating standby in a channel of a repeater that is controlled by another repeater controller.

IPC Classes  ?

• H04B 7/14 - Relay systems
• H04W 84/08 - Trunked mobile radio systems
• H04W 28/08 - Load balancing or load distribution
• H04W 16/26 - Cell enhancers, e.g. for tunnels or building shadow
• H04W 16/32 - Hierarchical cell structures
• H04W 24/08 - Testing using real traffic
• H04W 72/04 - Wireless resource allocation

Abstract

[Problem] To provide an audio communication system wherein a relaying device is connected to terminal devices, which are communication devices, via a communication network and wherein the relaying device is caused to manage the group of the terminal devices. [Solution] An audio communication system comprises: a master relaying device; one or more slave relaying devices connected to the master relaying device via a communication network; and one or more terminal devices connected to each relaying device via a communication network. Each slave relaying device transfers, to the master relaying device, audio signals received from the terminal device in charge of the slave relaying device. The master relaying device transfers the audio signals, which were received from each slave relaying device, to the slave relaying devices other than that slave relaying device.

IPC Classes  ?

• H04W 4/06 - Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]Services to user groupsOne-way selective calling services
• H04B 7/14 - Relay systems
• H04W 84/20 - Leader-follower arrangements

Abstract

[Problem] To enable the response audio signal of one transceiver to be heard by other transceivers, in cases when a plurality of subordinate transceivers (wireless handset) are present. [Solution] A relaying device is provided with: a wireless apparatus interface having a repeater connected thereto; a signal processing unit connected to the wireless apparatus interface; a network interface connected to a network; a packet processing unit connected to the network interface; and a mixing unit provided between the signal processing unit and the packet processing unit. The packet processing unit reads out an audio signal from a packet inputted from the network interface, and outputs the audio signal as a downlink audio signal. The mixing unit inputs the downlink audio signal into the signal processing unit, and inputs an uplink audio signal into the signal processing unit. The signal processing unit outputs, to the wireless apparatus interface, the downlink audio signal and the uplink audio signal.

IPC Classes  ?

• H04B 7/155 - Ground-based stations
• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• G06F 3/16 - Sound inputSound output
• H04L 5/14 - Two-way operation using the same type of signal, i.e. duplex
• H04L 5/16 - Half-duplex systemsSimplex/duplex switchingTransmission of break signals

Abstract

[Problem] To provide a communication system for simplifying terminal device configuration. [Solution] A communication system comprises a server and a terminal device. The server stores first information in order for the terminal device to communicate, and stores second information in order for the terminal device to connect to a network of the other bases. When the power is turned on in a normal operation, the terminal device connects to the network by using network information in a non-volatile memory unit, obtains the first information from the server, and writes the same in a volatile memory unit. Thus, the terminal device starts operation. When the power is turned on by using a particular operation, the terminal device connects to the network by using the network information in the non-volatile memory unit, obtains network information of the other bases from the server, and stores the same in the non-volatile memory unit. Thus, it is possible to connect to the network of the other bases.

IPC Classes  ?

• H04W 4/00 - Services specially adapted for wireless communication networksFacilities therefor
• H04W 8/22 - Processing or transfer of terminal data, e.g. status or physical capabilities
• H04W 84/12 - WLAN [Wireless Local Area Networks]
• H04M 1/253 - Telephone sets using digital voice transmission
• H04M 1/725 - Cordless telephones
• H04W 48/16 - DiscoveringProcessing access restriction or access information
• H04W 36/14 - Reselecting a network or an air interface
• H04W 36/36 - Reselection control by user or terminal equipment
• H04W 4/10 - Push-to-talk [PTT] or push-on-call services
• H04W 4/50 - Service provisioning or reconfiguring

Abstract

A communication control device includes an association table updater and a correction packet transmitter. The association table updater updates, when receiving from a first wireless device a packet containing an identification number of a first communication terminal connected to the first wireless device, an association table storing an address of the first wireless device and the identification number of the first communication terminal. The correction packet transmitter transmits, when a packet received from a second wireless device to which a second communication terminal is connected contains an address of the second wireless device, an identification number of the second communication terminal, and an identification number indicating a destination of the packet, and when the identification number indicating the destination is the identification number of the first communication terminal stored in the association table, a correction packet containing the address of the second wireless device and the identification number of the second communication terminal to the first wireless device after the packet is transmitted to the first wireless device.

IPC Classes  ?

• H04L 12/703 - Route fault prevention or recovery, e.g. rerouting, route redundancy, virtual router redundancy protocol [VRRP] or hot standby router protocol [HSRP]
• H04L 12/721 - Routing procedures, e.g. shortest path routing, source routing, link state routing or distance vector routing
• H04L 29/06 - Communication control; Communication processing characterised by a protocol
• H04M 11/00 - Telephonic communication systems specially adapted for combination with other electrical systems
• H04W 4/48 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for in-vehicle communication
• H04W 12/06 - Authentication
• H04W 40/34 - Modification of an existing route
• H04W 76/11 - Allocation or use of connection identifiers
• H04W 8/26 - Network addressing or numbering for mobility support
• H04L 29/12 - Arrangements, apparatus, circuits or systems, not covered by a single one of groups characterised by the data terminal

Abstract

An FFT processor applies the fast Fourier transform to each frame of an input signal and generates frequency domain data. A first spectrum calculator calculates the amplitude spectrum of the input signal for the individual frequency components based on the frequency domain data. A dispersion index calculator calculates a dispersion index indicating the level of dispersion of the amplitude spectrum of the input signal in the latest frames. A noise index calculator calculates a noise index indicating the level of noise contained in the input signal. A second spectrum calculator calculates the amplitude spectrum of the noise for the individual frequency components. A gain calculator calculates a spectral gain for suppressing the noise for the individual frequency components. An IFFT processor applies the inverse fast Fourier transform to the frequency domain data after multiplication by the spectral gain at a multiplier, and generates a signal to be output.

IPC Classes  ?

• G10L 21/0264 - Noise filtering characterised by the type of parameter measurement, e.g. correlation techniques, zero crossing techniques or predictive techniques
• G10L 15/20 - Speech recognition techniques specially adapted for robustness in adverse environments, e.g. in noise or of stress induced speech
• G10L 21/0232 - Processing in the frequency domain

Abstract

[Problem] To smoothly update configuration data comprising: fixed data set to a server by an administrator; and data rewritable by a user at a terminal. [Solution] A terminal device having a storage unit that stores configuration data, and a first and a second provisioning server are connected over a network. The terminal device includes an operation unit for rewriting variable data, which is a part of the plurality of configuration data. The first provisioning server stores all the configuration data. The second provisioning server stores fixed data, which is the plurality of configuration data excluding the variable data. The terminal device accesses the first provisioning server in an initial state in order to obtain all the configuration data and store the same in the storage unit. The configured terminal device accesses the second provisioning server in order to obtain the fixed configuration data.

IPC Classes  ?

• H04L 12/24 - Arrangements for maintenance or administration
• H04L 29/08 - Transmission control procedure, e.g. data link level control procedure
• H04W 8/24 - Transfer of terminal data
• G06F 13/00 - Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
• H04M 11/00 - Telephonic communication systems specially adapted for combination with other electrical systems

Abstract

[Problem] To conduct a process of moving a designated communication terminal belonging to a first communication system so as to belong to a second communication system without errors. [Solution] A management device is provided, which deletes information on a communication terminal of a first configuration device and then adds information of the communication terminal to the second configuration device. The management device is provided with an interface unit and a control unit. The interface unit obtains a first configuration file which stores a configuration data on a communication terminal belonging to a first communication system, and a second configuration file which stores a configuration data on a communication terminal belonging to a second communication system. The control unit deletes a configuration data of a designated communication terminal from the obtained first configuration file, and adds a configuration data of the designated communication terminal to the obtained second configuration file.

IPC Classes  ?

• H04W 4/00 - Services specially adapted for wireless communication networksFacilities therefor
• H04W 8/08 - Mobility data transfer
• H04W 64/00 - Locating users or terminals for network management purposes, e.g. mobility management
• H04L 29/08 - Transmission control procedure, e.g. data link level control procedure
• H04M 3/42 - Systems providing special services or facilities to subscribers
• H04L 12/24 - Arrangements for maintenance or administration
• H04W 60/04 - Affiliation to network, e.g. registrationTerminating affiliation with the network, e.g. de-registration using triggered events
• H04W 8/06 - Registration at serving network Location Register, VLR or user mobility server

Abstract

[Problem] A data update system of the present invention allows a user to update a data of a server while security of the server is maintained. [Solution] The present invention is provided with a main server for storing a configuration data, a terminal device to which update data for updating a part of or whole of the configuration data is input, a remote configuration device for communicating with the terminal device for receiving and storing the update data input to the terminal device, and a communication server for communicating with the main server and the remote configuration device. The remote configuration device transmits the update data received from the terminal device to the communication server. The communication server updates the configuration data stored in the main server with the update data received from the remote configuration device.

IPC Classes  ?

• H04W 4/50 - Service provisioning or reconfiguring
• G06F 13/00 - Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
• H04M 11/00 - Telephonic communication systems specially adapted for combination with other electrical systems
• G06F 8/65 - Updates
• G06F 9/445 - Program loading or initiating
• G06F 8/658 - Incremental updatesDifferential updates
• H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04L 12/24 - Arrangements for maintenance or administration
• H04W 4/00 - Services specially adapted for wireless communication networksFacilities therefor
• H04W 4/10 - Push-to-talk [PTT] or push-on-call services

Abstract

[Problem] To provide a relay device and a voice communication system with which calling and listening among a plurality of talk groups is possible. [Solution] The present invention is provided with: a relay device which stores a plurality of groups and terminal devices belonging to each of the groups, and, when a voice signal is received from one or more of the terminal devices (calling terminal devices), transfers the voice signal to the terminal devices other than the calling terminal device in the group to which the calling terminal device belongs; and the plurality of terminal devices which are connected to the relay device via a communication network. The relay device also stores the master-slave relationship among the plurality of groups, transfers the voice signal to the terminal devices belonging to a master group if the group to which the calling terminal device belongs is a slave group, and transfers the voice signal to the terminal devices belonging to slave groups if the group to which the calling terminal device belongs is the master group.

IPC Classes  ?

• H04M 3/00 - Automatic or semi-automatic exchanges
• H04M 3/42 - Systems providing special services or facilities to subscribers
• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04W 4/08 - User group management
• H04W 4/10 - Push-to-talk [PTT] or push-on-call services

Abstract

[Problem] To enable preferential communication using a terminal device by setting a specific mode in the terminal device by user operation and thereby increasing the priority of the terminal device. [Solution] A server as a relay device, when forming a new session, compares the priority of an existing session with the priority of the new session, and, if the priority of the new session is higher than the priority of the existing session, removes a competing terminal device participating in the existing session from the existing session and causes the competing terminal device to participate in the new session. Further, upon reception, from a terminal device set in a specific mode, of a specific calling voice signal designating the terminal device participating in the existing session as a communication counterpart, the server removes the terminal device participating in the existing session from the existing session regardless of the priorities of the sessions, and causes the terminal device to participate in a session to be formed by the specific calling voice signal.

IPC Classes  ?

• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities

Abstract

[Problem] To achieve a voice communication system which communicates between two networks that use partially overlapping address spaces. [Solution] According to the present invention, first and second networks are connected to one another by means of a gateway device provided with: a first protocol stack which manages transmission and reception addresses of communication packets in the first network; a second protocol stack which manages transmission and reception addresses of communication packets in the second network; and a call control unit which, upon reception of a communication packet from either network, determines the transfer destination network and transfer destination address of the packet on the basis of call destination information included in the packet.

IPC Classes  ?

• H04L 12/28 - Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
• H04W 88/16 - Gateway arrangements
• H04L 12/66 - Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• H04M 3/56 - Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
• H04L 29/06 - Communication control; Communication processing characterised by a protocol
• H04W 8/24 - Transfer of terminal data
• H04W 88/04 - Terminal devices adapted for relaying to or from another terminal or user
• H04L 12/741 - Header address processing for routing, e.g. table lookup

Abstract

A data calculator repeatedly calculates electric power of a delayed transmission signal and a multiplication value of a complex conjugate of the delayed transmission signal and a feedback signal. A memory stores, for each delayed electric power address corresponding to the electric power, a first total value that is the total of electric power of the delayed transmission signal and a second total value that is the total of the multiplication value. A range adjuster adjusts the upper limit of a determination reference range according to the maximum reference address. When a determiner determines that the number of repeats of the data calculator is sufficient based on the determination reference range, a vector calculator calculates a distortion correction vector based on a distortion vector calculated from the ratio between the first total value and the second total value. An updater updates the distortion correction vector stored in a look-up table based on the distortion correction vector.

IPC Classes  ?

• H03F 1/32 - Modifications of amplifiers to reduce non-linear distortion
• H04B 1/04 - Circuits

Abstract

A signal input from a microphone is A-D converted by an A-D converter, is frequency differentiated by a pre-emphasis circuit, and is input to a shift control circuit. The shift control circuit includes a limiter circuit, a phase shifter, and a harmonic suppressor. The limiter circuit performs amplitude limitation so as to limit the amplitude of the input control target signal to be equal to or less than a first threshold. The phase shifter shifts, for the control target signal having the amplitude limited, a phase of a frequency component within the predetermined frequency range. The harmonic suppressor suppresses, for the control target signal phase-shifted by the phase shifter, a frequency component equal to or greater than a second threshold, and outputs an information signal that is the control target signal having the frequency component of equal to or greater than the second threshold suppressed. The modulator performs frequency modulation on a carrier wave in accordance with the information signal. The transmitter produces a transmission signal from the frequency-modulated carrier wave, and transmits the transmission signal via an antenna.

IPC Classes  ?

• H03D 3/18 - Demodulation of angle-modulated oscillations by detecting phase difference between two signals obtained from input signal by means of synchronous gating arrangements
• H03C 3/09 - Modifications of modulator for regulating the mean frequency
• H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
• H03C 3/06 - Means for changing frequency deviation
• H03G 3/30 - Automatic control in amplifiers having semiconductor devices
• H03J 7/02 - Automatic frequency control
• H04B 1/16 - Circuits
• H04N 9/66 - Circuits for processing colour signals for synchronous demodulators
• H03G 7/00 - Volume compression or expansion in amplifiers
• H04B 1/04 - Circuits

Abstract

A shift control circuit includes a first limiter circuit, a phase shifter, a first suppressor, and a reducer. The first limiter circuit limits the amplitude of a control target signal input from a microphone, having undergone A-D conversion by an A-D convener, and frequency differentiation by a pre-emphasis circuit, and having the relative intensity of harmonic components increased. The phase shifter performs, for the control target signal having undergone the amplitude limitation, phase shift on the frequency component within a first frequency range. The first suppressor suppresses, for the control target signal having undergone the phase shift, the frequency component equal to or greater than a second threshold. The reducer suppresses, for the control target signal having the suppressed frequency component, the frequency component within a second frequency range, and outputs as an information signal. A modulator performs frequency modulation on a carrier wave in accordance with the information signal, and a transmitter produces a transmission signal from the carrier wave having undergone the frequency modulation, and transmits the transmission signal via an antenna.

IPC Classes  ?

• H04N 9/66 - Circuits for processing colour signals for synchronous demodulators
• H03C 3/06 - Means for changing frequency deviation
• H03C 3/09 - Modifications of modulator for regulating the mean frequency
• H03D 3/18 - Demodulation of angle-modulated oscillations by detecting phase difference between two signals obtained from input signal by means of synchronous gating arrangements
• H03G 3/30 - Automatic control in amplifiers having semiconductor devices
• H04L 27/16 - Frequency regulation arrangements
• H04L 27/22 - Demodulator circuitsReceiver circuits
• G06F 1/10 - Distribution of clock signals
• H03G 11/00 - Limiting amplitudeLimiting rate of change of amplitude
• H03K 5/131 - Digitally controlled

Abstract

When receiving ACK via a communication interface (51), an allocation unit (52) allocates channels of repeaters to be controlled to communications between a plurality of wireless terminals. A determination unit (53) determines whether channels allocable to the communications between the plurality of wireless terminals are in short supply or not. If the determination unit (53) determines that the allocable channels are in short supply, a switching control unit (54) controls at least one repeater that is a repeater for control among the repeaters to be controlled by a repeater controller (5a, 5b), and causes the repeater to transmit, to a wireless terminal that is in a standby state on the channel of the repeater, a switching signal instructing standby on the channel of a repeater controlled by another repeater controller (5a, 5b).

IPC Classes  ?

• H04W 28/08 - Load balancing or load distribution
• H04W 16/26 - Cell enhancers, e.g. for tunnels or building shadow
• H04W 16/32 - Hierarchical cell structures
• H04W 84/08 - Trunked mobile radio systems

Goods & Services

Voice encoding and decoding apparatus; computer programs for voice encoding and decoding; voice compression apparatus; computer programs for voice compression; vocoder; computer programs; telecommunication apparatus; computer hardware.

Abstract

A radio apparatus includes a Man-Overboard detection unit, a control unit and a distress key. The Man-Overboard detection unit outputs a Man-Overboard signal when the radio apparatus has fallen to a water surface or into water. The control unit generates a distress signal including a distress type. A distress key outputs a distress key manipulation signal to the control unit when the distress key is manipulated. When the control unit receives the Man-Overboard signal from the Man-Overboard detection unit, the control unit automatically sets a distress type of the distress signal to Man-Overboard.

IPC Classes  ?

• G08B 1/08 - Systems for signalling characterised solely by the form of transmission of the signal using electric transmission
• G08B 21/08 - Alarms for ensuring the safety of persons responsive to the presence of persons in a body of water, e.g. a swimming poolAlarms for ensuring the safety of persons responsive to an abnormal condition of a body of water
• G08B 21/04 - Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
• G08B 29/18 - Prevention or correction of operating errors
• G08B 5/38 - Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmissionVisible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission using visible light sources using flashing light

Abstract

[Problem] To enable group communication with a high degree of freedom in a voice communication system in which a relay device and a terminal device are connected over a communication network. [Solution] A voice communication system comprises a terminal device and a relay device which transmit and receive a voice signal with each other over a network. The relay device has a group table. The terminal device transmits, to the relay device, specifying information specifying a group to which the terminal device belongs. When receiving the specifying information from the terminal device, the relay device registers the terminal device in the group table, so as to belong to the designated group. The terminal device transmits, to the relay device, a voice signal destined to the group to which the terminal device belongs. When receiving, from the terminal device, the voice signal destined to the belonging group, the relay device transfers the voice signal to another terminal device belonging to the specified group.

IPC Classes  ?

• H04W 4/02 - Services making use of location information
• H04W 4/08 - User group management
• H04B 7/155 - Ground-based stations
• H04W 76/00 - Connection management
• H04W 76/45 - Connection management for selective distribution or broadcast for push-to-talk [PTT] or push-to-talk over cellular [PoC] services
• H04W 4/10 - Push-to-talk [PTT] or push-on-call services
• H04W 84/12 - WLAN [Wireless Local Area Networks]

Abstract

[Problem] To provide a communication system for simplifying terminal device configuration. [Solution] A communication system comprises a server and a terminal device. The server stores first information in order for the terminal device to communicate, and stores second information in order for the terminal device to connect to a network of the other bases. When the power is turned on in a normal operation, the terminal device connects to the network by using network information in a non-volatile memory unit, obtains the first information from the server, and writes the same in a volatile memory unit. Thus, the terminal device starts operation. When the power is turned on by using a particular operation, the terminal device connects to the network by using the network information in the non-volatile memory unit, obtains network information of the other bases from the server, and stores the same in the non-volatile memory unit. Thus, it is possible to connect to the network of the other bases.

IPC Classes  ?

• H04W 36/00 - Handoff or reselecting arrangements
• H04W 8/22 - Processing or transfer of terminal data, e.g. status or physical capabilities
• H04W 84/12 - WLAN [Wireless Local Area Networks]
• H04W 36/14 - Reselecting a network or an air interface
• H04W 36/36 - Reselection control by user or terminal equipment
• H04M 1/253 - Telephone sets using digital voice transmission
• H04W 48/16 - DiscoveringProcessing access restriction or access information
• H04M 1/725 - Cordless telephones
• H04W 4/10 - Push-to-talk [PTT] or push-on-call services
• H04W 4/50 - Service provisioning or reconfiguring

Abstract

A radio apparatus includes a control unit, a power unit, a distress key and a transmission unit. When the distress key is manipulated, a distress key manipulation signal is output to the control unit and the power unit. When the power unit receives the distress key manipulation signal during a power supply is stopped, the power unit supplies power to the control unit and the transmission unit. When the control unit receives power from the power unit, the control unit starts setting up the radio apparatus and counts a time that the control unit continuously receives the distress key manipulation signal. When the control unit continuously receives the distress key manipulation signal for a preset time or longer, the control unit outputs a power supply maintenance signal to the power unit, generates the distress signal, and causes the transmission unit to send the distress signal.

IPC Classes  ?

• G08B 3/10 - Audible signalling systemsAudible personal calling systems using electric transmissionAudible signalling systemsAudible personal calling systems using electromagnetic transmission
• G01S 19/17 - Emergency applications
• G08B 25/01 - Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
• G01S 5/00 - Position-fixing by co-ordinating two or more direction or position-line determinationsPosition-fixing by co-ordinating two or more distance determinations
• B60K 35/00 - Instruments specially adapted for vehiclesArrangement of instruments in or on vehicles
• B60R 25/04 - Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor

Abstract

A communication control device (2) is provided with a correspondence table updating unit (12), and a corrected packet transmission unit (13). When a packet including the identification number of a first communication terminal connected to a first wireless machine is received from the first wireless machine, the correspondence table updating unit (12) updates a correspondence table in which the address of the wireless machine and the identification number of the communication terminal are associated and stored. When a packet received from a second wireless machine to which a second communication terminal is connected includes the address of the second wireless machine, the identification number of the second communication terminal and an identification number indicating the destination of the packet, and the identification number indicating the address is the identification number of the first communication terminal that is stored in the correspondence table, the corrected packet transmission unit (13) transmits the packet to the first wireless machine, and thereafter transmits a corrected packet including the address of the second wireless machine and the identification number of the second communication terminal to the first wireless machine.

IPC Classes  ?

• H04W 4/00 - Services specially adapted for wireless communication networksFacilities therefor
• H04M 11/00 - Telephonic communication systems specially adapted for combination with other electrical systems
• H04W 8/26 - Network addressing or numbering for mobility support
• H04W 40/34 - Modification of an existing route
• H04W 80/04 - Network layer protocols, e.g. mobile IP [Internet Protocol]

Goods & Services

Communications by transceivers; communications by cellular phones; communications by computer terminals; providing telecommunications connections to a global computer network; telephone services; radio communications; paging services [radio, telephone or other means of electronic communication]; rental of telecommunication equipment; rental of transceivers; rental of telephones; rental of modems.

Goods & Services

Marine transceivers; radiotelephones; marine radios; fish finders; ultrasonic sensors for marine purpose; marine radars; automated -identification system (AIS) transponders and receivers; marine compasses; course plotters; GPS receivers; GPS navigation devices for marine purpose; remote controls; radio frequency repeaters; transceivers; wireless communications equipment; remote controls for radio repeaters and transceivers; on-board computers for ship; computers; computer programmes, recorded.