65results about How to "Control transmit power" patented technology

The invention provides a wireless sensor network based on a dynamic routing mechanism, and a topology control method for the wireless sensor network. The wireless sensor network consists of a sensor node, a convergence node, and upper computer software. The method mainly comprises three steps: firstly building network topology through the dynamic routing mechanism; secondly carrying out estimation according to RSSI and LQI indexes, and then adjusting the emission power of the sensor node; and finally carrying out the maintenance of the structure of the network topology, thereby guaranteeing the connectivity and reliability of the network. The method based on power control can reduce the interference among signals, improves the stability of the network, and prolongs the life cycle of the network.

The invention relates to the field of cognitive radio (CR) and cellular mobile communication, in particular to a differential game-based CR system power control method. The control method comprises the following steps of: 1) constructing a CR system model; 2) designing a power extraction cost function and a power radiation hazard cost function; 3) constructing a power control differential game model; and 4) resolving feedback Nash equilibrium. In the method, the dynamic property of time continuity of an actual CR system is described well, a non-cooperative differential game model for controlling CR system power is established, a differential game-based distributed non-cooperative power control method is provided, and a feedback Nash equilibrium analytic solution is acquired. Through power control in a distributed non-cooperative power cognitive differential game (DNPCDG) algorithm, interference among cognitive users is effectively suppressed, so that total throughput is increased, and system performance is improved.

The invention provides a method for adjusting launching power of a subscriber station and a device therefor. The method mainly comprises the steps as follows: Sounding signal sent by the subscriber station is received and carrier wave interference noise ratio (CNIR) of the Sounding signal is obtained; CNIR of the Sounding signal is compared with the preset threshold value; and the launching powerof the subscriber station is adjusted according to the comparison result. The invention can realize the effective control of the launching power of MS on the basis of the Sounding signal sent by the MS and the preset threshold value, so as to control the Sounding launching power of the MS and meet the requirement of Sounding-based channel estimation method.

The invention provides a downstream HS-SCCH power control method and a device for carrying out the same. In the state of CELL_FACH, the method controls the emission power of the an HS-SCCH by using signal-to-noise Ec / Io information of a downstream CPICH which is reported by a UE through an RACH, thereby realizing the power control of the downstream HS-SCCH under the condition of enhanced CELL_FACH, and ensuring that the UE in enhanced CELL_FACH condition can correctly receive BCCH and CCCH information.

The invention discloses a cognitive ratio power control method. The method improves a revenue function on the basis of a non-cooperative game power control algorithm proposed by D.Goodman, and provides a new power control algorithm based on non-cooperative game; and simultaneously, for improving the searching precision of the power control algorithm, the invention further provides an improved shuffled frog leaping algorithm. The cognitive radio power control method of the invention has higher calculation accuracy, implements effective control on transmitting power of users, and can improve system performance obviously.

This invention discloses a method for controlling power of a UE, which pre-sets a monitor period and a RNC receives the UE communication data from the base station and determines the retransmission times of the UE data, when the period is full, the RNC gets the overrun times of the retransmission of the UE communication data in the period based on the retransmission times and the threshold value set before hand to decide the communication data volume should be received by the UE in the period to compute the target value of a new SIR to control the UE to adjust the emission power based on the target value.

The invention discloses a method for improving the performance of cell edge users by using a multi-objective genetic algorithm, and relates to the field of communication. The method for improving the performance of the cell edge users by using the multi-objective genetic algorithm can reduce the number of edge users to the greatest extent and greatly improve the service quality and the satisfaction degree of the users. The method comprises the following steps: enabling a base station to judge whether a user is a cell edge user or not according to measurement reports of the user; enabling the base station to determine the geographical positions of the edge users in coverage; enabling the base station to determine the base station which is in the vicinity of a cell edge user set according to the geographical positions of the edge users and the geographical position of the base station; enabling the base station to exchange information with the neighboring base station through X2; and enabling the base station to generate a coverage adjusting strategy through the multi-objective genetic algorithm according to the obtained information, and adjusting the activation and the closing of an RRU (radio remote unit), the transmission power and the declination angle and the azimuth angle of an antenna to change the coverage, thereby ensuring that users in the inter-cell overlapping region are as few as possible.

The invention discloses a power control method of user facility, which comprises the following steps: recoverying and carrying out ascending DPCCH (private physics control channel) launching; checking descending control channel of base station; adjusting the ascending DPCCH sending power according to the result of descending control channel. The invention can control UE sending power when the DPCCH recovers, which improves the system capacitance.

This invention relates to a design method for automatic power control module under the burst out mode of terminals in a TD-SCDMA radio communication system and its circuit, in which, the emission power is adjusted for two or over two times of time intervals of adjustment and user terminals compute the necessary emission power values according to the signal intensity received and compute the step times, time length of the step or the power value increased or reduced each time necessary for adjusting the user terminals to reach the required emission power values so as to control the emission power of the user terminal to reach to the needed one.

The invention is concerned with the controlling method that the two high-speed up link grouping accesses the down controlling channel power. One method is : confirms the channel emission power by the TPC emission power and the channel correspond fixing power off-set; another method is: processes adjustment for HICH emission power according to the condition of ACK on the HICH channel, and confirms the RGCH emission power according to the fixing power off-set of the HICH that corresponds with the RGCH. The invention can control the emission power of the HSUPA down controlling channel RGCH and HICH effectively, makes the emission power minimum.

Interference that occurs during wireless communication may be managed through the use of fractional reuse and other techniques. In some aspects fractional reuse may relate to HARQ interlaces, portions of a timeslot, frequency spectrum, and spreading codes. Interference may be managed through the use of a transmit power profile and / or an attenuation profile. Interference also may be managed through the use of power management-related techniques.

Interference that occurs during wireless communication may be managed through the use of fractional reuse and other techniques. In some aspects fractional reuse may relate to HARQ interlaces, portions of a timeslot, frequency spectrum, and spreading codes. Interference may be managed through the use of a transmit power profile and / or an attenuation profile. Interference also may be managed through the use of power management-related techniques.

The invention discloses a power allocation method and a power allocation device in a multiple input multiple output open loop region. The method comprises that: when the available subcarriers of a base station are mapped to F frequency subregions, and a multiple input multiple output (MIMO) open loop region is set in the ith frequency subregion, then the data subcarrier power p2 of the MIMO open loop region in the ith frequency subregion is in accordance with the following condition: Pout is less than or equal to Pmax; wherein detaFi is power difference between a frequency subregion Fi and a frequency subregion F0, i is more than or equal to 0 and less than or equal to F, and the F is more than or equal to 1, the Pmax is the maximum value of the total transmission power of each orthogonal frequency division multiplexing (OFDM) symbol, the Pout is the total actual transmission power of each OFDM symbol; Nused is available subcarrier quantity in each OFDM symbol; and deta1p and deta2p are power constraint values, and are more than or equal to zero. The invention also provides a power allocation device in the multiple input multiple output open loop region. By the method and the device, the interference of the whole network can be reduced to a certain level so that the service quality of cell-edge users and the frequency spectrum efficiency of the whole network are ensured.

The invention relates to a method for the regulation of transmission power of a user terminal in a radio communication system, whereby a scaling of a transmission power of a first channel is only carried out independently of a scaling of a transmission power of at least one second channel, when the regulation of the transmission power is not oriented to the first channel.

The invention provides an expansion adapter for an ultrahigh-frequency FRID reader-writer. The expansion adapter for an ultrahigh-frequency FRID reader-writer comprises a reader-writer, a power amplifier connected with the reader-writer, an antenna switching device connected with the power amplifier, multiple antennas connected with the antenna switching device, and a main controller, wherein the scope of the frequency range of the multiple antennas is between 902MHz to 928 MHz; the main controller is connected with the reader-writer, the power amplifier, and the antenna switching device and is used for performing information interaction with the reader-writer, adjusting the amplification coefficient of the power amplifier, and controlling the antenna switching device to switch among the multiple antennas. The expansion adapter for an ultrahigh-frequency FRID reader-writer is capable of controlling the transmitting power of the antennas and providing a uniform reader-writer interface to external devices.

The invention discloses a method and a system for controlling power of a common channel. The method comprises the following steps that: if user equipment determines that the quality of a current wireless coverage cannot meet a requirement, a communication request signal is transmitted to system equipment; and an access entity of the system equipment controls the transmitting power of the common channel according to the received communication request signal. By adopting the technical scheme, the transmitting power of the common channel can be reasonably controlled according to the actual need of the user equipment; the energy consumption of the whole wireless communication network is reduced, and the radio frequency pollution and the radio frequency interference of the whole network coverage area are reduced; and the interference between the access entities can be reduced and the system gain is obtained.

The present invention is applicable to the communication field, and provides an uplink channel power control method and device, comprising: comparing a preamble transmission parameter with at least one preset parameter threshold to obtain a comparison result, and determining a channel priority according to the comparison result; When multiple uplink channels need to be transmitted at the same time, the transmit power of the multiple uplink channels is controlled according to the channel priority; the multiple uplink channels include the PRACH. The present invention adopts a non-fixed strategy for the ranking of PRACH in the channel priority, by comparing the transmission parameter of the preamble with the preset parameter threshold, or according to the signaling of the receiving base station to determine the ranking of the PRACH in the channel priority, thereby Power control is performed on uplink channel transmission, which avoids the situation that the UE transmit power exceeds its maximum transmit power or reaches the interference level, and can prevent power limitation and interference limitation.

The embodiment of the invention discloses a pre-coding method, which comprises the steps: performing pre-coding preorder processing on a signal to be transmitted, wherein the power of the signal to be transmitted is increased by the preorder processing; selecting a power limitation algorithm according to a selection rule; performing power limitation operation on the signal subjected to preorder processing according to the selected power limitation algorithm; and generating a pre-coded signal according to the signal after the power limitation operation. The embodiment of the invention also discloses a transmitter, a receiver and a pre-coding system. By using the pre-coding method, the transmitter, the receiver and the pre-coding system, the adverse effect of the power limitation operation on the signal transmission can be reduced as much as possible while the transmitting power is limited by using the power limitation operation.

Interference that occurs during wireless communication may be managed through the use of fractional reuse and other techniques. In some aspects fractional reuse may relate to HARQ interlaces, portions of a timeslot, frequency spectrum, and spreading codes. Interference may be managed through the use of a transmit power profile and / or an attenuation profile. Interference also may be managed through the use of power management-related techniques.

The invention discloses a method and apparatus for transmitting and receiving a signal in a communication system supporting device todevice scheme. The present disclosure relates to a pre-5th-generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-generation (4G) communication system such as a long term evolution (LTE). A method for transmitting a device to device (D2D) discovery signal by a user equipment (UE) in a communication system supporting a D2D scheme is provided. The method includes determining transmission power for D2D discovery signal transmission, and transmitting a D2D discovery signal using the transmission power, wherein the transmission power is determined by considering a cell at which the D2D discovery signal is transmitted.

The invention discloses a wireless transmitting power prediction control method for reliability demand constraint of an intelligent substation, and the method comprises the steps: constructing a wireless signal propagation state space equation with state observation through the analysis of the relation among reliability, a signal-to-noise ratio and transmitting power and the utilization of a lossmodel and a Kalman filter of wireless signal propagation; performing expected signal-to-noise ratio compensation by estimating a confidence interval of signal-to-noise ratio fluctuation in real time;finally, defining a quadratic cost function taking the difference between the transmitting power and the actual signal-to-noise ratio and the expected signal-to-noise ratio as a target, and realizingoptimal control of the transmitting power through a dynamic programming algorithm. According to the invention, the problem of coordination between the transmitting power of the wireless sensor networkand the wireless communication reliability in the transformer substation environment can be solved, so that the transmitting power of the node is reduced as much as possible while the wireless communication reliability is ensured.

A sum of transmission powers for all channels for transmissions from a base station to mobile stations is controlled to constant. Specifically, the transmission power for a high speed and high capacity shared channel is controlled such that a sum of transmission powers for individual channels for individual mobile stations, and the shared channel is always constant. With this constitution, an interference wave power from neighboring cells becomes constant, an average data transfer rate of the shared channel becomes constant, a prediction precision for a wait time for sending / receiving data increases, a lower limit for an actual data transfer rate becomes high, and the number of users in a service quality assurance type service increases. Additionally, when the number of individual channels in use is low, the transmission power for shared channel can increase, and the transmission rate increases and the time decreases when a best effort type service is provided.

The invention relates to a laser power control method and a laser. The laser comprises a light transmitting element, a light receiving element, a grating lens and a processor, wherein the light transmitting element is used for transmitting light; the grating lens is used for dispersing the transmitted light; the light receiving element is used for receiving the reflected light generated during theprocess of dispersing the transmitted light by the grating lens and converting the reflected light to current signals; and the processor is used for controlling the light transmitting power of the light transmitting element according to the current signals. Thus, the reliability of an infrared laser is improved.

This user device is for use in a mobile communication system provided with a base station and a user device and is provided with: a reception means that receives a plurality of prioritized signaling values from the base station, said signaling values corresponding to bands that are used by the user device; a selection means that selects the signaling value having the highest degree of priority from signaling values that can be applied by the user device among the plurality of signaling values; and a control means that applies the signaling value selected by the selection means and controls transmission power.

The invention relates to a novel mobile phone burglar alarm system. The novel mobile phone burglar alarm system comprises a hardware module and a software module. The hardware module is a set of wireless communication equipment and comprises a near monitor and a plurality of short-range transponders. The monitor is composed of a power supply, a host, a link management unit, a host interface unit, a link control unit, a wireless unit and an alarm unit. Each transponder is composed of a power supply, a host, a link management unit, a host interface unit, a link control unit and a wireless unit. The novel mobile phone burglar alarm system is characterized in that the effective signal transmission distance of the wireless units can be adjusted, and an undetachable small power supply needs to be additionally arranged inside a mobile phone. The novel mobile phone burglar alarm system can solve the technical problem that with a traditional mobile phone burglary prevention scheme, real-time and on-site burglary prevention can not be achieved.

The invention discloses a depth sensor, a detection system and a method for controlling the transmission power of the sensor. The method comprises the following steps: acquiring priori information ofa working environment to be tested; presetting the prior information of the working environment to be tested; performing calculation according to the preset priori information of the working environment to be tested and detection information to obtain position information and orientation information of an active sensor; calculating maximum transmission power according to the position information and the orientation information of the active sensor, and correspondingly dynamically adjusting the transmission power of the active depth sensor according to the maximum transmission power. The depthsensor, the detection system and the method for controlling the transmission power of the sensor have the advantages that the transmission power is intelligently dynamically adjusted and controlled and the power consumption of a device provided with the active depth sensor is reduced.

The invention discloses a method for improving the performance of cell edge users by using a multi-objective genetic algorithm, and relates to the field of communication. The method for improving the performance of the cell edge users by using the multi-objective genetic algorithm can reduce the number of edge users to the greatest extent and greatly improve the service quality and the satisfaction degree of the users. The method comprises the following steps: enabling a base station to judge whether a user is a cell edge user or not according to measurement reports of the user; enabling the base station to determine the geographical positions of the edge users in coverage; enabling the base station to determine the base station which is in the vicinity of a cell edge user set according to the geographical positions of the edge users and the geographical position of the base station; enabling the base station to exchange information with the neighboring base station through X2; and enabling the base station to generate a coverage adjusting strategy through the multi-objective genetic algorithm according to the obtained information, and adjusting the activation and the closing of an RRU (radio remote unit), the transmission power and the declination angle and the azimuth angle of an antenna to change the coverage, thereby ensuring that users in the inter-cell overlapping region are as few as possible.

The invention discloses a radar sampling interval control method based on an improved recurrence method. Firstly, a relation of change of radiant power and residence time of a radar with target distance is obtained based on a radar detection model and a passive interception theory; and for further reducing radiant power of the radar, radar sampling interval, as a time resource control strategy, isintroduced. The method provided by the invention has the advantage of determining the next moment of radar radiation according to a result of comparison between a threshold and a filtering residual value in an airborne radar filtering algorithm. By Monte carlo simulation, in comparison with other algorithms, a radar sampling interval control algorithm provided by the invention can obtain greateraverage sampling interval under premise of approximately identical precision, and is beneficial for improving radio frequency stealth performance of the radar.