67results about How to "Maintain communication quality" patented technology

A method and apparatus for monitoring and controlling one or more aspects of one or more communication devices. In one embodiment the communication device is configured to transmit and receive packets of data via a packet-switched network. In one configuration the monitoring and controlling is performed by a command and control system (C/C system) that is configured to operate in conjunction with a communication device. In one configuration the communication device comprises an Interface device configured to Interface a voice communication network with a packet switched network. The C/C system may be configured to monitor or control aspects of the communication device including temperature, cooling device operation, security, drive operation, power supply output and power supply routing, system re-boots, or any other aspect of device operation. In one configuration the C/C system Interfaces with a remote location via a communication link, such as a packet switched network. Monitoring and control of various systems can be achieved from the remote location.

The object of the invention is to achieve stable operation of a communication device which includes an information transmission means and a power transmission means while maintaining communication quality. A mobile device of the invention has an information transmission means for executing non-contact transmission, a power transmission means, a first control means for controlling the information transmission means to repeat an active period and a sleep period, and a second control means for controlling the power transmission means to transmit a power during the sleep period.

In a wireless communication system where packet transmission begins after a preparation process is performed between a source and a destination, the source stores, in a header of a preparation packet, first duration information corresponding to an end of a first response packet sent from the destination and second duration information corresponding to an end of a second response packet sent from the destination. A neighboring station having received the preparation packet sets a first NAV relating to a scheduled reception completion time of the first response packet based on the first duration information and a second NAV relating to a scheduled reception completion time of the second response packet based on the second duration information and ignores the second NAV when no packet transmission is detected within the first NAV period or within a predetermined time after the scheduled reception completion time of the first response packet.

A high-frequency micro-strip line for transmitting a high-frequency wave for a wireless LAN system has a layered structure where, on a ground layer made of a conductive material, a dielectric layer made of a dielectric material and a signal line made of a conductive material are successively laid. The high-frequency micro-strip line further includes a patch antenna comprising a dielectric plate made of a dielectric material and a patch made of a conductive material, which are successively laid into a layered structure, the patch antenna being electrically connected to the signal line. A wireless-communication RF signal transmission device capable of being applied to such a line is also provided.

The present invention relates to an optical transmission apparatus capable of suppressing a transitional gain variation when a number of signal wavelengths changes, and maintaining communication quality in optical signals. The optical transmission apparatus is provided with an optical power control device that varies light power of light for each wavelength component corresponding to a wavelength channel, the light including signal light and spontaneous emission light; a wavelength arrangement information obtaining unit that obtains arrangement information of the wavelength channel of the signal light; and a control unit that controls the power control device based on the arrangement information obtained at the wavelength arrangement information obtaining unit so that light power of a wavelength component of the signal light and light power of a wavelength component other than the wavelength component of the signal light become substantially equal.

A handover control equipment includes a handover destination determining unit configured to determine a handover destination radio access system based on communication quality of a communicating communication type used in a radio access system to which a mobile terminal connects, radio resource use statuses of handover destination candidate radio access systems, and communication qualities of communication types provided by handover destination candidate radio access systems, and a handover controller configured to control handover to the handover destination radio access system.

A femto base station according to the present invention includes: a downlink perch channel signal transmission power controller unit configured to change a transmission power of a downlink perch channel signal when a first condition is satisfied; and an uplink reception sensitivity controller unit configured to change an uplink reception sensitivity when a second condition is satisfied after the first condition is satisfied.

A base station of the present invention performs transmission power control quickly with maintaining communication quality in mobile communications systems, by setting up priority about transmission power control and performing transmission power control sequentially from a channel with a high priority. A channel priority setting unit outputs priority information indicating priority for transmission power control about a plurality of channel information. A power calculation unit outputs total power information of all channels about the plurality of channel information. A power adjustment unit performs power adjustment to the channel information selected on the basis of the priority information when the total power information has larger value than maximum transmission power information.

A method and apparatus for deciding whether the handover has to be done or not, where the decision is taken by the mobile unit. The mobile unit can reject the command from the base station if the quality of the communication might not be maintained in the second network. This decision is taken measuring some quality parameters of the second network and comparing them with a predefined threshold.

An electronic device including a first antenna, a second antenna, a first sensor, a signal processing module and an antenna control module is provided. The first antenna has a function of transmitting a wireless signal and is disposed on a first side of the electronic device. The second antenna is disposed on a second side of the electronic device. The first sensor detects whether a first object is around the first antenna and generates a first sensing signal according to a detecting result. The signal processing module generates a first control signal according to the first sensing signal. The antenna control module switches the function of transmitting the wireless signal from the first antenna to the second antenna.

A wireless access gateway for communication of wave signals at radio frequencies within a frequency band, includes an access gateway enclosed in a housing including a bottom wall and a main circuit board overlying the bottom wall and having an upper surface substantially parallel to the bottom wall. The gateway is equipped with an antenna system including at least two antennas: a first linearly polarized antenna for propagating a first wave signal along a first polarization axis including a first radiating element extending along a first longitudinal axis lying on a first plane substantially parallel to the base plane, and a second linearly polarized antenna for propagating a second wave signal along a second polarization axis oriented perpendicularly to the first polarization axis, the second antenna including a second radiating element extending along a second longitudinal axis lying on a second plane oriented perpendicularly to the first plane. The first and second antennas are positioned relative to each other at a distance of at least λ/2, where λ is the wavelength corresponding to a radio frequency within the frequency band.

A method and apparatus for transmitting packets of data over a packet-switched network and for monitoring the transmission characteristics associated with the transmission is disclosed. In one configuration the method and apparatus is configured to interface with a telephone network, such as the public switched telephone network. In such a configuration, two or more interface devices located at different locations connect to a computer network, such as the Internet and to a telephone network. The interface devices receive information from the telephone and manipulate this information and transmits it over a computer network to another interface device. Also included is monitoring and routing software located on any of the interface devices or a separate monitoring and routing system. The monitoring and routing software is in communication with each interface device to obtain information regarding the communication characteristics between each of the one or more interface devices. If the communication characteristics are undesirable, the monitoring and routing software may communicate with the one or more interface devices to achieve a change in routing of the information over the computer network.

A reception quality information obtaining unit obtains reception quality information indicating reception quality of each of a plurality of antennas at predetermined intervals. A reception quality variation trend recognition unit recognizes a variation trend of a value in relation to reception quality of each of the antennas obtained. A correlation determination unit determines a degree of correlation between the antennas based on the variation trend of the value in relation to the reception quality of each of the antennas recognized. An antenna selection unit selects at least two antennas to be used for wireless communication, based on the degree of correlation between the antennas determined by the correlation determination unit .

A wireless communication method includes attempting to establish a first wireless connection. Next, an attempt is made to establish a second wireless connection using a different channel from the first wireless connection. Subsequently, a determination is made as to whether the first wireless connection and the second wireless connection are established. When the first wireless connection and the second wireless connection are established, a manner of signal transmission between the first wireless connection and the second wireless connection is coordinated to transmit uplink data and downlink data, respectively, such that a duplex mode of operation is realized.

Provided is a base station capable of maintaining a communication quality of a communication terminal (mobile station) having registered its position with the base station itself, even if an operating frequency is changed. According to the present invention, the base station includes a transmission and reception unit 102 configured to transmit and receive signals at the operating frequency for communication with the communication terminal, a pilot beacon transmission unit 104 configured to transmit a pilot beacon to a communication terminal, in communication with another base station, at an operating frequency of the another base station in order to allow the communication terminal to detect the operating frequency of the base station itself, and a control unit 101, if changing the operating frequency of the transmission and reception unit 102, configured to control the pilot beacon transmission unit 104 to change the frequency of the pilot beacon to transmit therefrom to the operating frequency of the transmission and reception unit 103 before changed and transmit the pilot beacon at this frequency.

In a network configured using a wireless link in which a transmission rate fluctuates, accommodation efficiency of traffic is improved while communication quality of VBR traffic is maintained. A bandwidth control device includes a stability level calculation unit which calculates a stability level indicating a probability that a bandwidth is available in a wireless link using adaptive modulation, a utilization rate calculation unit which calculates a utilization rate of a bandwidth used by traffic to be accommodated, an allocation unit which allocates, to the traffic, a link bandwidth of the stability level corresponding to the utilization rate of the traffic, and a path control unit which sets a path for the traffic in the wireless network including a communication device that performs communication over the wireless link based on the allocated link bandwidth.

A radio base station (1) measures the volume of communication with radio terminals connected to said radio base station (1), and if said volume of communication exceeds a threshold value, the radio signal transmission power of the base station is decreased, and a request is made to other radio base stations to increase the radio signal transmission power of said other radio base stations.

A wait-time acquisition unit measures a wait time before transmission of data in an exposed terminal, and an interference-amount inferring unit infers the amount of interference in the exposed terminal based on the wait-time information. A channel-utilization calculation unit calculates an amount of channel utilization based on the inferred amount of interference. A call admission controller controls call admission based on the amount of channel utilization that is considered with the amount of interference in the exposed terminal.

Provided is an electronic device and a control method thereof. The electronic device comprises a sensor plate, a proximity sensor, a controller and an adjustable antenna element. The proximity sensor is coupled to the sensor plate and is used for detecting a capacitance value between the human body and the sensor plate. The controller is coupled to the proximity sensor and generates a first control signal according to the capacitance value. The adjustable antenna element is coupled to the controller and comprises a main radiating part, a plurality of adjusting parts and a plurality of switchers. The switchers are respectively coupled between the adjusting parts and the main radiating part, and selectively connect or do not connect the adjusting parts and the main radiating part according to the control signal so as to correct an operation frequency band of the adjustable antenna element. When the human body is close to the electronic device, the electronic device can correct the operation frequency band according to the position of the human body so as to maintain good communication quality.