38results about How to "Large transmission power" patented technology

A hierarchical cell structure (HCS) cellular communications system includes a macro cell encompassing a smaller micro cell that employ the same frequency band. The macro cell includes a macro cell base station, and the micro cell includes a micro cell base station. An uplink communication cell boundary between the macro cell and the micro cell is established, and a downlink communication cell boundary between the macro cell and the micro cell is established. A radio network controller determines whether a condition exists in the HCS system which indicates that the uplink and downlink micro cell boundaries should be unbalanced. If the condition is met or exists, the power and / or antenna beam tilt of a downlink transmission from the micro cell base station is reduced to unbalance the uplink and downlink micro cell boundaries. Alternatively, the radio network controller may employ an offset value to mathematically reduce mobile detected pilot power levels associated with the micro base station.

According to embodiments of the invention, a communications system includes an error correction encoder that error correction encodes a bitstream according to an error correction code. The system also includes a variable symbol generator that generates a symbol according to a selected one of a plurality of selectable signal constellations from a group of bits of the error correction encoded bitstream. The system further includes a spreader that spreads the symbol according to a spreading code, and a transmitter that transmits the spread symbol in a communications medium. Preferably, the plurality of selectable signal constellations includes at least two signal constellations of different order. In other embodiments, the error correction encoder includes a variable error-correction encoder that encodes the bitstream according to a selected error correction code of a plurality of selectable error correction codes. In still other embodiments, the spreader includes a variable spreader that spreads the symbol according to a selected spreading code of a plurality of selectable orthogonal spreading codes including at least two spreading codes of different lengths. A controller may select the error correction code used by the variable error correction encoder, the signal constellation used by the variable symbol generator, and the spreading code used by the variable spreader to provide a desired information transmission rate for the bitstream. Related methods are also described.

A system and method are provided for global transmission power control in a wireless communication device. The method comprises: measuring the received power of a receiving device; collecting the received power measurements, and accepting a received power threshold; and, generating the optimal transmit power level for a transmitting device, in response to the collected received power measurements and received power threshold. The received power measurements of base station can be collected and the method generates the optimal transmit power level for a mobile station in response to the collected base station received power measurements. Alternately, the received power for mobile stations in a network downlink can be measured and collected, and the optimal transmit power level for a base station can be calculated in response to the collected mobile station received power measurements.

A communication control device is provided which efficiently utilizes wireless resources to improve communication quality and system throughput by appropriately setting and performing node transmission power. The communication control device in a wireless LAN system includes a sender 206, a receiver 207, and an inter-AP communication function 211 for determining, based on at least one of wireless information obtained by measurement of a wireless signal by an access point 103 or a station 104a, or reported wireless information, whether or not there is a neighboring BSS, and a transmission power determination function 210 and a transmission power setting / update function 205 for setting and updating the transmission power of the access point 103 and the station 104a in its own BSS when there is a neighboring BSS in which all the access point have the control function of the transmission power, on the other hand, for maximizing the transmission power when there is no neighboring BSS or when there is a neighboring BSS that does not control the transmission power.

In a conventional OFDMA / SCFDMA communication scheme, frequency resource assignment information is exchanged between BSs via a wired interface and used for control of inter-cell interference or the like. When a BS performs assignments of frequency resources, taking the status of a neighbor BS signaled via the wired interface into account, it might be impossible to follow a change in the status of the assignments of frequency resources at the neighbor BS due to a delay occurring in the wired interface. BS selects and assigns distributed frequency resources or continuous frequency resources, depending on the position of an MS in the cell and the transmit power of the BS.

A tire sensor device comprising sensor modules 20A to 20D, each comprising a sensor, a communication module having a communication function and a power regenerating circuit, and an antenna; and a base station comprising an internal communication device for communication with the sensor modules 20A to 20D, an information processing device for processing tire information signals from the sensor modules, an external communication device for communicating with a car control device 40 on the car body side and a power source. The sensor modules 20A to 20D and the base station 30 are arranged in the tire and constitute an intra-tire LAN. Tire information signals transmitted from the sensor modules 20A to 20D are processed by the base station 30 and transmitted to the car control device 40 so that appropriate tire information can be obtained and the size and power consumption of the sensor device can be reduced.

A method and device for the baseband process of space-time / space-frequency / spatial diversity transmitter in the SC-FDMA system, the device is characterized in that: 1) an encoding means is connected to the output end of the M-point DFT module; 2) a space-time encoding means, for encoding the corresponding symbol of at least two adjacent symbol sets, and outputting at least two data sets; each sub-carrier mapping means maps respectively each data set to the corresponding antenna, so that the mapped data satisfy the requirements: The symbols mapped on each antenna keep the same sequence as the M symbols outputted by the M-point DFT module; the mapped symbols keep the same sub-carrier interval; the M data of each mapped SC-FDMA symbol are the M outputted data of the DFT module, or the inverse of the M outputted data, or the complex conjugate of the M outputted data, or the inverse complex conjugate of the M outputted data. The present invention implements effective space diversity, reduces PAPR, and makes frequency domain equalization feasible.

A magnetic transmission system for an adjustable curtain installed inside a double pane window. Under full insulation condition of the double pane window, by use of two magnetic pieces separated by the glass, the rotation of the magnetic pieces will drive a pull cord, which will then effectively control and adjust the status of the curtain which is installed inside the window. The invention provides large transmission power in a small space. In addition to the typical thermal and acoustic insulation functions, the invention adds additional function of easy and flexible light adjustment. The invention can be widely used in different applications, such as standard home doors and windows, movable windows and large-scale windows, door and glass walls, skylights, etc.

It is described a relay node for providing wireless access for a user equipment to a telecommunication network. The relay node includes an antenna, which is adapted to operate with different spatial characteristic antenna patterns, and a transceiver unit, which is coupled to the antenna and which is adapted to activate at least one of the different spatial characteristic antenna patterns. It is further described a corresponding method for providing wireless access for a user equipment to a telecommunication network via a relay node.

Embodiments provide a user equipment for a wireless communication system. The user equipment is configured to communicate with at least one other user equipment of the wireless communication system using a sidelink resource pool of the wireless communication system. Further, the user equipment is configured to transmit, responsive to an external emergency situation, an emergency notification signal on a resource of the wireless communication system. Thereby, the user equipment is configured to transmit the emergency notification signal with a transmit power that is greater than a regular transmit power used by the user equipment for transmitting regular signals.

For use in a radiocommunication system using a frequency band close to a frequency band of a different radiocommunication system, a radiocommunication device, or a mobile, is controlled so that a maximum of transmission power is set according to an up-link frequency in use. The closer the up-link frequency in use is to the frequency band of the different radiocommunication system, the lower the maximum of transmission power is set.

The present disclosure has an object to provide a specific communication technology for realizing effective communication with a flying object in a communication apparatus including the flying object. The communication apparatus includes a first base station, a flying object including a second base station, and a mobile terminal to communicate with the second base station. The first base station notifies flying object specification information that is information indicating that the second base station is included in the flying object. When the flying object specification information is received, the mobile terminal sets a direction of a beam for detecting the second base station to a second direction that is a direction vertically upward compared to a first direction that is the direction of the beam in a case where the flying object specification information is not received.

A tire sensor device comprising sensor modules 20A to 20D, each comprising a sensor, a communication module having a communication function and a power regenerating circuit, and an antenna; and a base station comprising an internal communication device for communication with the sensor modules 20A to 20D, an information processing device for processing tire information signals from the sensor modules, an external communication device for communicating with a car control device 40 on the car body side and a power source. The sensor modules 20A to 20D and the base station 30 are arranged in the tire and constitute an intra-tire LAN. Tire information signals transmitted from the sensor modules 20A to 20D are processed by the base station 30 and transmitted to the car control device 40 so that appropriate tire information can be obtained and the size and power consumption of the sensor device can be reduced.

A wireless communication terminal includes first and second case members coupled together by a coupling portion so that the positional relation therebetween can be changed, an external wireless communication antenna provided at the first case member, an external wireless communication control portion mainly controlling external wireless communication carried out through the external wireless communication antenna, a first internal wireless communication antenna, a first internal wireless communication control portion controlling internal wireless communication carried out through the first internal wireless communication antenna, a display part provided at the second case member, a second internal wireless communication antenna, a second internal wireless communication control portion controlling internal wireless communication carried out through the second internal wireless communication antenna, and an output power control portion controlling the output power of waves transmitted by the internal wireless communication based on the timing of transmitting waves transmitted through the external wireless communication antenna.

The invention discloses a tree-clearing device under power lines. The tree-clearing device comprises a telescopic rod. A fixed cutter head is mounted at the top of the telescopic rod, and connected with a movable cutter head through a rotating shaft. The movable cutter head is connected with a pull rope, the other end of the pull rope is connected with an operating handle on the lower portion of the telescopic rod, and the movable cutter head and the fixed cutter head are connected through a spring. When branches being cleared are hard and large in size, a mechanical device can be operated manually, so that transmission power is larger; when the branches being cleared are soft and small in size, the mechanical device can be operated electrically, so that working efficiency is high and convenience in using is realized.

A wireless communication terminal includes first and second case members coupled together by a coupling portion so that the positional relation therebetween can be changed, an external wireless communication antenna provided at the first case member, an external wireless communication control portion mainly controlling external wireless communication carried out through the external wireless communication antenna, a first internal wireless communication antenna, a first internal wireless communication control portion controlling internal wireless communication carried out through the first internal wireless communication antenna, a display part provided at the second case member, a second internal wireless communication antenna, a second internal wireless communication control portion controlling internal wireless communication carried out through the second internal wireless communication antenna, and an output power control portion controlling the output power of waves transmitted by the internal wireless communication based on the timing of transmitting waves transmitted through the external wireless communication antenna.

A linearizer includes fifth diodes, a third resistor, sixth diodes, and a first n-channel MOS transistor. When a low-level voltage is applied to first and fourth control voltage terminals and a high-level voltage is applied to second and third control voltage terminals, a low-level voltage is applied to a fifth control voltage terminal, and when a high-level voltage is applied to the first and fourth control voltage terminals and a low-level voltage is applied to the second and third control voltage terminals, a high-level voltage is applied to the fifth control voltage terminal.

A wireless communication terminal includes first and second case members coupled together by a coupling portion so that the positional relation therebetween can be changed, an external wireless communication antenna provided at the first case member, an external wireless communication control portion mainly controlling external wireless communication carried out through the external wireless communication antenna, a first internal wireless communication antenna, a first internal wireless communication control portion controlling internal wireless communication carried out through the first internal wireless communication antenna, a display part provided at the second case member, a second internal wireless communication antenna, a second internal wireless communication control portion controlling internal wireless communication carried out through the second internal wireless communication antenna, and an output power control portion controlling the output power of waves transmitted by the internal wireless communication based on the timing of transmitting waves transmitted through the external wireless communication antenna.

The invention discloses an infinitely variable transmission. The infinitely variable transmission comprises planetary gears. Each planetary gear comprises an inner gear ring, a planet carrier and a sun wheel. In the two planetary gears, the inner gear rings, the planet carriers and the sun wheels are in series connection correspondingly. The inner gear rings in the two planetary gears are in transmission connection; the sun wheels in the two planetary gears are in transmission connection; and the planet carriers in the two planetary gears are in transmission connection. In the mentioned threetransmission connection lines, one or more are in fixed-rotating-speed-difference variable speed transmission. The infinitely variable transmission further comprises a speed regulator. The speed regulator is in series connection into one of the transmission connection lines and used for infinitely regulating the variable speed difference of the transmission connection line where the speed regulator is located. The transmission connection line where the speed regulator is located and the transmission connection line where variable speed transmission is located are different transmission connection lines. According to the infinitely variable transmission, the planetary gears are applied to achieve all-geared engagement; and the infinitely variable transmission has the beneficial effect of zero crossing point continuous speed regulation and meanwhile is large in transmission power and high in transmission efficiency.

A wireless communication system, an apparatus in the wireless communication system and a method. The apparatus at a user equipment side in the wireless communication system includes: a wireless link problem detector, detecting a first wireless link between a first node and a user equipment to determine whether a wireless link problem occurs; a timer configuration unit, which starts a first timer when detecting that the wireless link problem occurs on the first wireless link, wherein the user equipment considers that a wireless link failure event occurring on the first wireless link is detected when the first timer expires; and a wireless link information reporting unit, which reports content including wireless link information of the first wireless link to a second node through a second wireless link between the user equipment and the second node when detecting that the wireless link problem occurs on the first wireless link.

A communication device, method, and computer program product provide dynamic cell selection with transmit power cut back for local constraints. A transceiver of the communication device scans for cells within communication range of the communication device. An uplink transmit power limit associated with each one of the one or more cells is based at least in part on a maximum transmit power supported by the transceiver. A controller of the communication device determines cuts back of the uplink transmit power limit in response to determining that a local constraint is applicable to the communication device. The controller prioritizes selection of the one or more cells for connecting to the communication device based on the respective uplink transmit power limit contained in the data structure and causes the communication device to connect to the prioritized cell from among the cells.