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 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.

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.

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 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 (lambda/2) of a using frequency of the radio machine, and an electric notch.

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.

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 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.

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.

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.