49results about How to "High-quality communication" patented technology

Apparatus, method and system for notifying a communications-switching center that subsequent communications directed to a wireless number associated with the wireless unit are to be routed to a destination number associated with the wireless unit. In response to a triggering event by the wireless unit through the base unit, the base unit causes the wireless unit to transmit an SMS message to the communications-switching center. The SMS message includes a notification that subsequent communications directed to the wireless number associated with the wireless unit are to be routed to the destination number associated with the wireless unit.

A wireless communication method for performing communication between a respective plurality of base stations and a corresponding plurality of terminal stations, each base station having a plurality of beams and being capable of switching the plurality of beams, including selectively switching a combination of beams used by the respective base stations among a plurality of combinations of beams and transmitting, synchronously and sequentially, training frames to the plurality of terminal stations, storing information representing the plurality of combinations of beams for the plurality of base stations based on a result of reception of the training frames, and selecting, from the stored information representing the combinations of beams for the plurality of base stations, a combination of beams that provides a best overall performance of the plurality of base stations, and allowing it to perform communication to be performed between the plurality of base stations and corresponding terminal stations.

A wireless communication circuit in accordance with the present invention, is the wireless communication circuit having an amplifier for amplifying a signal, includes an amplification route in which the signal passes through the amplifier; a bypass route for bypassing the amplifier; and a route-selector for selecting one of the amplification route and the bypass route. This arrangement prevents an amplification of a signal, being transmitted or being received, when a communication counterpart is in a close distance, thereby reducing an unnecessary power consumption.

A folding type portable radio machine, includes a chassis part formed by a first chassis and a second chassis, the second chassis being foldably connected to the first chassis. The chassis part includes a conductive part having conductivity whose full length is an approximately half wave length (λ / 2) of a using frequency of the radio machine, and an electric notch.

The invention relates to the field of communication, and discloses a communication frequency point dynamic switching method, an Ad-Hoc network node, and an unmanned plane remote control system. According to the invention, the method comprises the steps: starting a communication frequency point mechanism when the Ad-Hoc network node detects that the communication quality decreases to a certain threshold value; notifying an opposite end node to obtain measurement time slots with the fixed interval for measuring pilot frequency points; carrying out the measurement of the pilot frequency points in a pilot frequency list in the measurement time slots, so as to capture the clean pilot frequency points to serve as target frequency points for frequency point switching; and carrying out the switching of communication frequency points. Therefore, the method can dynamically switch the communication frequency point to a clean frequency point when the Ad-Hoc network is disturbed by interference, and guarantees the communication quality of the Ad-Hoc network. Moreover, the method is simple in implementation, and does not need to increase hardware cost.

In a base station device 12 of an OFDMA mobile communication system, a frequency band storage unit 22 stores multiple frequency bands allocatable to mobile station devices, respectively, in association with predetermined conditions related to communication quality. A communication quality acquisition unit 37 acquires communication quality in communication with each of the mobile station devices. A frequency allocator 24 selects any one of the frequency bands from the frequency band storage unit 22 on the basis of the communication quality acquired by the communication quality acquisition unit 37, and notifies the mobile station device of channel information indicating the selected frequency band. Then, the mobile station device communicates with the base station device 12 in the frequency band indicated by the channel information notified by the frequency allocator 24 in the base station device 12.

A reference local oscillation signal transmission station 1 radiates a reference local oscillation signal to a service zone. A portion of the signal received by each radio slave station terminal 2 is branched and fed to an injection locked oscillator 6. As a result, a local oscillation signal which is synchronized with the reference local oscillation signal is obtained. In the slave station terminal 2, the thus-obtained local oscillation signal is fed to a transmission frequency converter (mixer) 7 and a reception frequency converter (mixer) 8. An IF band transmission modulated signal is fed to the mixer 7 for frequency conversion to a radio frequency band, and the thus-obtained radio-frequency modulated signal is transmitted. Meanwhile, a received radio-frequency modulated signal is fed to the mixer 8 for down conversion, and the thus-obtained signal is fed to an IF band demodulator 10 so as to restore an information signal. The present invention not only solves the problem of deterioration of signal quality stemming from phase noise and frequency offset generated in a millimeter wave band oscillator, but also improves the efficiency of frequency use.

This invention provides a communication system, a repeater terminal in the communication system and a communication method for improving the characteristics in a multi-hop communication by a diversity gain and reduces the power consumption by wasteful retransmission in packet transmission at a wireless terminal. When a transmitter terminal S sends a packet first time, repeater terminals R1-R13 perform a data transmission by retransmission at all the terminals which received the packet. When a transmitter terminal S sends a packet second time, a repeater terminal determines its own contribution based on the hop numbers of the repeating in the packet transmission and the return ACK (or NACK) repeating. The repeater terminal with a high contribution autonomously determines to be in “repeater mode” and the repeater terminal with a low contribution autonomously determines to be in “sleep mode”.

A wireless communication circuit in accordance with the present invention, is the wireless communication circuit having an amplifier for amplifying a signal, includes an amplification route in which the signal passes through the amplifier; a bypass route for bypassing the amplifier; and a route-selector for selecting one of the amplification route and the bypass route. This arrangement prevents an amplification of a signal, being transmitted or being received, when a communication counterpart is in a close distance, thereby reducing an unnecessary power consumption.

A communication apparatus (50) includes an acquisition unit (551) configured to acquire, from a base station apparatus (20) being connected, switching information including information used for wireless communication with a movably configured base station apparatus (20) to be a switching destination candidate, a determination unit (551) configured to determine whether or not to switch a base station apparatus (20) to be a connection destination, and a connection unit (553) configured to, upon determining by the determination unit (552) to switch the base station apparatus (20) to be the connection destination, execute connection to the base station apparatus (20) to be the switching destination candidate on a basis of the switching information.

Disclosed are an apparatus and method for transceiving a signal using a frame structure appropriate for a high-speed moving body. The method for transceiving a signal using a predetermined frame structure according to the present invention comprises a step of transceiving a signal via a frame having the predetermined frame structure, wherein one frame is constituted by eight subframes, and said frame consists of a type-1 subframe consisting of six orthogonal frequency division multiple access (OFDMA) symbols and a type-2 subframe consisting of seven OFDMA symbols, and said frame has a cyclic prefix length which is either 0, 1 / 32 of the useful symbol length, 1 / 64 of the useful symbol length, or 1 / 128 of the useful symbol length.

When a partial rate guaranteed service is applied to a communication line connecting predetermined routers, a TCP tunnel (TCP connection) is established between the routers, a packet whose destination is a router connected to the communication line is passed through the TCP tunnel, and other packets of an application using a UDP of a VoIP or the like are forwarded by a normal routing control without being passed through the TCP tunnel.

A low-cost communication system utilizing a code division multiple access, which controls scale-up of an apparatus due to the provision of an interference suppressing function in a base transceiver station, prevents the reduction of channel utilization efficiency, and enables a high-quality communication. Conventionally, a signal obtained through an interference cancellation stage process has been processed at subsequent cascade-connected stages. The interference cancellation stage process has been carried out by cascade-connecting several circuits performing the same process in a multi-stage interference-canceling device. However, in the present invention, by performing a demodulation process for generating replica signals, feeding back the replica signals to a correlation circuit for another demodulation process, and repeating the same signal process, the interference cancellation stage process is carried out. Such a configuration enables reduction of hardware.

The invention relates to a self-tuned type broadband smartwatch antenna and a method thereof. The self-tuned type broadband smartwatch antenna is composed of a mechanical part and an antenna part; the mechanical part is composed of a second hand, a second hand rotating shaft, a second wheel, a cam and a spring connection body; the antenna part comprises an antenna feeding piece and an antenna radiation body; the second wheel and the centre of the second wheel are coupled through the second hand rotating shaft; the cam is arranged at the other side of the centre of the second wheel; the second wheel is connected with the antenna part through the cam; the antenna feeding piece and the antenna radiation body are physically connected through the spring connection body; feeding is realized through capacity coupling of the antenna feeding piece and the antenna radiation body; furthermore, electromagnetic radiation is generated; the antenna mechanically rotates by utilizing the second hand; and the distance between the antenna feeding piece and the antenna radiation body is changed. According to the self-tuned type broadband smartwatch antenna and the method thereof disclosed by the invention, the antenna mechanically rotates by utilizing the second hand; the distance between the antenna feeding piece and the antenna radiation body is changed; therefore, the self-tuned antenna having the multi-frequency-band broadband performance can be realized; by means of the self-tuned structure, 1.8-2.74 GHz frequency bands, 4G TDD LTE common frequency bands and WIFI 2.4 GHz frequency bands can be covered; and furthermore, high efficiencies of various frequency points can be ensured.

The invention relates to a wired measurement and transmission motor for a measurement while-drilling instrument, which mainly solves the problems that a measurement parameter measuring point is far from a well bottom and high-quality communication is difficult to realize by adopting a wireless communication mode in the prior art. The wired measurement and transmission is characterized in that: a main measurement assembly I is arranged on a transmission shaft (1); a male slip ring (13) is placed in a short joint (16) of a male slip ring assembly; communicating axial holes are formed inside a shell D (8), a shell A (10), a stator tube shell (11), a shell B (12) and a step (14) of the male slip ring (13); the end faces of the shell D (8), the shell A (10), the stator tube shell (11), the shell B (12) and the step (14) of the male slip ring (13), corresponding to the axial holes, are provided with annular grooves (25); communication wires are placed in the axial holes; and conductive rings are placed in the annular grooves (25). The wired measurement and transmission motor has the characteristics of short distance between the measuring point and the well bottom and capability of realizing high-quality communication in a wired communication mode.

A data output apparatus checks data accumulated state in the accumulating unit at a preset check interval, and changes at least one setting among an initial accumulation amount to be used as a basis for starting to output the data accumulated in the accumulating unit, an upper accumulation limit amount to be used as a basis for discarding accumulated data, and a check interval, according to a discarded state of the data based on check results. Therefore, in the data output apparatus such as an IP telephony terminal apparatus, it is possible to prevent sound interruption and limit a lowering of communication quality.

A plurality of types of available transmission rates to be used for transmission of data packets are individually managed for each receiver terminal. When there are a plurality of data packets to be transmitted onto a transmission buffer and when it is possible to transmit said plurality of data packets simultaneously, the packet sizes representative of the data amounts of the respective data packets are referred to as well as the transmission rates of the respective data packets associated with the receiver terminals. The packet time lengths (transmission times) defined by the packet sizes and transmission rates are checked for the respective data packets. A plurality of data packets whose packet time lengths are approximately equal to each other are selected regardless of their receiver terminals. The transmissions of the plurality of selected data packets are commenced simultaneously by use of a plurality of radio channels.

A SAW device D1 according to the present invention comprises a ladder-type SAW device T1 for transmission and a ladder-type SAW device R2 for receiving on a main surface of a piezoelectric substrate. The ratio (LT / PT) of the width LT of electrode fingers to the pitch PT between the electrode fingers in a SAW resonator S1 in the ladder-type SAW device T1 for transmission is made lower than the ratio (LR / PR) of the width LR of electrode fingers to the pitch PR between the electrode fingers in a SAW resonator S2 in the ladder-type SAW device R2 for receiving. As a result, the SAW device D1 has a low loss within a band and has steep attenuation characteristics outside the band, and is miniaturized.

A communications system implementing a high-speed, high-quality communication in an oblong communication range such as communication with a mobile body or the like, and a leakage optical fiber suitably used in such a communications system. The optical fiber (2) is a GI type optical fiber having a core so constituted that a refractive index at its center is large and it is gradually reduced toward its periphery, and may permit the mixing of a scatterer. A modulation light sent from a transmitter (1) into the optical fiber (2) travels through the optical fiber (2) with part of it leaking from the side surface of the optical fiber (2). A receiver (3) receives this leaked light and demodulates it to capture information. Being of a GI type, the optical fiber (2) is small in waveform rounding and permits a high-speed, high-quality mobile communication.

Disclosed is a FAX communication system for improving security and reliability of FAX communication. A FAX receiver receives FAX data and transmission source information. A transmission destination designation information acquisition section obtains transmission destination designation information during indirect communication of FAX data. A transmission destination number extraction section extracts stored and managed transmission destination numbers using the obtained information. An encryption processor extracts stored and managed serial numbers using the obtained information and encrypts identification data containing at least one of the transmission source information and serial number related to FAX data for transmission to generate encrypted data. An encrypted data attaching section attaches the encrypted data to FAX data for transmission to generate FAX data with encrypted data. A FAX transmitter transmits the FAX data with encrypted data to the transmission destination number. A decryption section receives the FAX data with encrypted data to decrypt the encrypted data.

Each band-pass unit of a second transmitting / receiving apparatus includes a band-pass means and a receiving quality detection means. The respective band-pass means have different passbands. The receiving quality detection means detects receiving quality information of a signal that has passed through the band-pass means. A receiving quality control means generates a receiving quality control signal based on the receiving quality information. The receiving quality control signal is a signal which becomes a basis for controlling the electric energy level of a signal transmitted by a first transmitting / receiving apparatus. The first transmitting / receiving apparatus adjusts the level of the signal transmitted in each passband.

A method includes emitting a reference signal following K transmission paths during a first configuration time slot, identifying valid transmission paths among the set of K transmission paths by listening, according to each transmission path of the set, for a feedback reference signal from the second device during the second configuration time slot; and emitting data signals in each communication time slot of which the associated transmission path has been identified as valid.

Disclosed herein is a network-based voice over power lines (VoPL) telephone communication system, comprising a power line network, multiple clients and a server. The clients are respectively connected to the power line network for providing access for a user telephone and / or for providing a user operation interface. The server comprises at least one power interface and one telephone interface connected to the power line network, and to the clients via the power line network, for handling calls and transfer from the clients. The clients comprise power line adapters and / or power line telephones, the power line adapter comprises at least one power interface and one telephone interface for inputting numbers and / or information via keypads to make a call, and the power line telephone comprises at least one power interface for inputting numbers and / or information via keypads to make a call. An implementation method for a network-based voice over power lines (VoPL) telephone communication system is also disclosed herein.

In a base station device 12 of an OFDMA mobile communication system, a frequency band storage unit 22 stores multiple frequency bands allocatable to mobile station devices, respectively, in association with predetermined conditions related to communication quality. A communication quality acquisition unit 37 acquires communication quality in communication with each of the mobile station devices. A frequency allocator 24 selects any one of the frequency bands from the frequency band storage unit 22 on the basis of the communication quality acquired by the communication quality acquisition unit 37, and notifies the mobile station device of channel information indicating the selected frequency band. Then, the mobile station device communicates with the base station device 12 in the frequency band indicated by the channel information notified by the frequency allocator 24 in the base station device 12.

The invention relates to a multilayer or high building, wherein, the external upright surface is concave into the external wall of upper and lower floors to form a concave space in which people can process outdoor activity; the bottom and top of concave space have several steps; the bottom spans and connect at least three natural floors; the bottom via steps is divided into several unit areas. The invention can provide an area for accelerating the outdoor activity between denizens, and simulate the climbing effect.

When a partial rate guaranteed service is applied to a communication line connecting predetermined routers, a TCP tunnel (TCP connection) is established between the routers, a packet whose destination is a router connected to the communication line is passed through the TCP tunnel, and other packets of an application using a UDP of a VoIP or the like are forwarded by a normal routing control without being passed through the TCP tunnel.