32 results about "Energy efficient transmission" patented technology

A thermostat control system having remote devices and / or other internally powered devices provides transmissions at different power levels and at different data transfer rates to conserve power life. Thermostat control system components and devices may be powered by replaceable power supplies that are conserved by transmitting at a lower power level more often than at a higher power level. A higher power level transmission is provided at a lower data transfer rate, and a lower power level transmission is provided at a higher data transfer rate. A higher power transmission is provided periodically to ensure reliable communication of temperature information.

Systems, methods, apparatus, devices and computer program products enhance uplink inter-cell interference cancellation with HARQ retransmissions. The decoding of a data packet depends on whether the interfering packet was decoded. Since the interfering packet is itself transmitted using a HARQ process, the transmission by the victim UT can be accomplished to take this situation into account. The latency of the victim UT can be varied based on the need for energy efficient transmission. In accordance with one specific aspect, if the receiver can decode multiple packets simultaneously, high data rates can be achieved using packet pipelining.

A time-of-propagation distance-determining method involves sending a probe request from a handset to an AP and receiving a return ACK. The time it takes for the probe request to propagate to the AP, the turnaround time, and the time it takes the ACK to propagate back to the handset is measured on the handset. The turnaround time is subtracted from the measured time, and the result is used to make a distance determination. In order to reduce power consumption, the “lowest overall transmit energy” setting that will give acceptable reception of a probe request sent by the handset to the AP station is determined. The lowest overall transmit energy setting involves a bit rate setting and a transmit power setting. The lowest overall transmit energy setting is used to send probe requests when probe requests are sent from the handset in carrying out a time-of-propagation distance-determining transaction.

The invention discloses a method for data energy conservation transmission between nodes in a wireless sensor network. Data transmission between a source node and a goal node is adhered to a Timeout media access control (T-MAC) protocol. The method is characterized in that the method further comprises the steps that when a node timer times, an external crystal oscillator circuit and a real time clock (RTC) module in a microprogrammed control unit (MCU) to time according to node states; when the nodes are in a wake-up state, the nodes uses the external crystal oscillator circuit to time; and when the nodes are in a dormant state, the nodes are switched to use the RTC module in the MCU to time. The method effectively reduces conflict rate, remarkably reduces network delay and reduces extra power consumption caused by data retransmission to a certain degree. Different models are utilized to time in wake-up and dormant states, so that the purpose of remarkably reducing average power consumption of nodes of the wireless sensor network.

The present invention relates to a method for data packet transmissions between a source node and a destination node in a network, the method comprising: —the nodes being configured with an initial sleeping time period duration SPinit and an initial wake-up time period duration LPinit, —the source node sending a preamble, segmented in micro-preambles, for indicating the beginning of a transmission, the micro-preambles being separated by listening slots, —the destination node sending, upon receipt of at least one of the micro-preamble, a packet indicating its presence, called “Ready-To-Receive”, or RTR, packet, and —the source node sending, in response to the RTR packet, a data packet intended for the destination node, wherein the step of sending a preamble comprises: —the source node determining, based on SPinit and on LPinit, an optimal size of the micro-preambles that minimizes the overall energy consumption in the network for sending and receiving packets related to this preamble transmission.

A method for intensifying combustion of gas-fuel mixtures consists of stimulating the combustion mixture in a combustion chamber by a pulsed high-voltage discharge of nanosecond duration, wherein the discharge amplitude is set up according to a condition of maximising a heat input in electronic degrees of freedom and in a gas dissociation and preventing the passage of plasma electrons to an escape mode at a main discharge stage, the high-voltage pulse leading edge build-up time is limited by the condition of obtaining a homogeneous filling of a discharge gap by plasma and a pulsed energy efficient transmission to the plasma, a high-voltage pulse time is limited by the condition, wherein a highly-unstable plasma state is attained, the discharge gap resistance is reduced, the discharge gap is better matched to a generator, and an efficient electric power input into the plasmas is obtained.

The invention relates to an efficient and energy-saving transmission method, which comprises the steps that: a transmission platform is established in advance, wherein the transmission platform comprises a motor, a standby motor, a current detection module, a motor driving module, a battery, a control module, a charge-discharge switching module, a motion control module and a variable speed gear box; the control module is electrically connected with the motor driving module, the current detection module, the variable speed gear box, the charge-discharge switching module and the motion control module; the motor driving module can drive the motor and the standby motor to rotate; the motor and the standby motor are connected with the variable speed gear box; the variable speed gear box drives the load to move; and the charge-discharge switching module is connected with the motor and the battery. The efficient and energy-saving transmission method has the advantages of good reliability and low cost, and can realize efficient and energy-saving transmission reasonably.

The invention relates to an energy-efficient transmission mechanism of a transverse cutting machine. The energy-efficient transmission mechanism is characterized in that an upper knife roll and a lower knife roll are connected with a left gearbox rack and a right gearbox rack through inner bearing blocks and outer bearing blocks, upper knife roll gears are arranged at the two ends of the upper knife roll respectively, and lower knife roll gears are arranged at the two ends of the lower knife roll respectively. A driving motor is connected with an input gear shaft through two diaphragm couplings. The input gear shaft is sleeved with an eccentric bearing sleeve. An input gear of the input gear shaft is meshed with a big gear of a two-stage transmission gear set. A pinion of the two-stage transmission gear set is meshed with the corresponding lower knife roll gear. The lower knife roll gears are meshed with the corresponding upper knife roll gears. A self-aligning roller bearing is arranged in each inner bearing block, and a deep groove ball bearing is arranged in each outer bearing block. The energy-efficient transmission mechanism has the advantages of being large in reduction ratio and efficient and saving energy.

Various techniques may be used to provide energy efficient delivery of content. In an example technique, portions of content may be transferred from a first computing device to a second computing device for display. Between transmissions of portions of the content, the radio of the first computing device may be placed in a low power mode. In another example technique, one or more portions of content may be decoded, displayed, encoded, and transmitted by a first computing device for mirroring on a second computing device. One or more other portions of the content may be transmitted to the second device in an encoded format without being decoded and displayed by the first device. In another example technique, the radio of the first device may be placed in a low power mode between transmissions of commands to control content to the second computing device.

Methods are provided for selecting a multiple-input multiple-output (MIMO) mode based on energy efficiency and selecting a subset of antennas to be used in communication in a wireless communication system using multi-user massive multiple antennas. The method selects a subset of antennas that minimizes the transmission power without using all antennas based on power consumption and transmission power caused by radio frequency (RF) circuits. The method also includes selecting a mobile station to which a signal is to be transmitted, selecting a multi-antenna technique based on power consumption of all antennas, selecting a subset of antennas among all antennas to transmit a signal to the mobile station, and transmitting a signal to the mobile station by using the antenna subset .

The invention discloses an antenna selection-based high-energy efficiency transmission method applied to a distributed system. The method comprises the following steps that: 1, the initial number V* of base station antennas selected by each user in a cell is calculated; 2, initial V* antennas are selected for each user kn in the cell, and the initial V* antennas constitute a service antenna set Bn, kn constitutes an n-th user set which represents by an equation that Upsilonn={kn}, Upsilonn and Bn constitute an n-th virtual cell Vn; 2, the large-scale fading factor betakn,l of the user kn to an l-th base station antenna is calculated, and transmission power rhokn provided by a downlink station antenna for the user kn is obtained; 3, a distance D (Vi,Vj) of any two virtual cells Vi and Vj is obtained; and 4, different virtual cells are merged, so that the energy efficiency of the system can be continuously increased. With the method of the present invention adopted, the number of base station active antennas of the distributed system which serve the users can be decreased with the rate of the distributed system ensured, and therefore, the power consumption of base stations can be decreased; and the effective receiving power of each user is controlled, and therefore, the energy efficiency of the system can be effectively improved with the spectrum effectiveness of the system ensured.

The invention is suitable for the wireless communication technology field and discloses an energy efficiency transmission method of a wireless body area network. The method comprises the following steps of establishing an unit bit energy consumption model of a wireless body area network communication system and acquiring a value range of a transmission rate, calculating a threshold distance according to the unit bit energy consumption model and a minimum value of the transmission rate; if a current transmission distance is less than the threshold distance, using an optimization algorithm to acquire an optimum transmission rate according to the unit bit energy consumption model and the value range of the transmission rate, and carrying out data transmission as the optimum transmission rate. The invention also discloses an energy efficiency transmission apparatus of the wireless body area network. By using the method and the apparatus of the invention, energy consumption of the wireless body area network communication system with a short transmission distance can be reduced and the service life of a cell is effectively prolonged.