32 results about "Energy efficient transmission" patented technology

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.

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 SP_init and an initial wake-up time period duration LP_init, —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 SP_init and on LP_init, 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 selects source and channel codec parameters according to varying channel conditions and signal to noise ratio for a given distortion constraint. The processes of source and channel encoding and decoding with the selected parameter values and transmit power level per quality layer minimize a total energy consumption for delivery of multimedia content from a transmitting terminal to a receiving terminal. The total energy consumption is defined as the energy consumed while processing and transmitting the multimedia. Coding parameters, such as channel code rates, error resilience redundancy, unequal error protection level, and transmit power level can vary from layer to layer.

The invention discloses a method for energy-efficient transmission of robustness in a cognitive network. According to the method for energy-efficient transmission of the robustness in the cognitive network, channel state information of relevant channels is measured through the receiving end of a secondary user and is fed back to the sending end of the secondary user; the sending end of the secondary user carries out measurement multiple times to determine an uncertain set of the gain of each channel; the secondary user establishes a model according to a robustness optimizing method to maximize secondary user energy efficiency; the poorest channel gain is solved, and a service quality requirement constraint of a main user is converted into a convex constraint; the optimal sending power is solved according to a power distribution algorithm, transmission is carried out on each channel according to the optimal sending power, and the optimal transmission power of the robustness is solved when the channel state information is uncertain. The method for energy-efficient transmission of the robustness in the cognitive network can be used for cognitive network communication and has the advantages that the maximization of the energy efficiency of the secondary user is guaranteed under the circumstance that the channel state information is uncertain, interference power at the receiving end of the main user is strictly controlled, the service quality of the main user is guaranteed, and negative influence of the uncertainty of the channel state information on the performance of the cognitive network is effectively eliminated.

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.

The invention relates to a safety belt retractor with a pre-tightening device. The safety belt retractor comprises a frame, winding shafts and the pre-tightening device. The pre-tightening device comprises a round pipe, a U-shaped plate, a force transmission ball set, a rack, a gear, a sealing ball, a spring, a gas generator and a housing. The round pipe is linked with the U-shaped plate and then is fixedly arranged in the housing; the linkage portion of the round pipe and the U-shaped plate is a linear segment portion, and one end, not linked with the U-shaped plate, of the round pipe is provided with the gas generator; the spring is arranged at one end, stretching into the round pipe, of the gear generator; and a long groove is formed in the linear segment portion of the round pipe, and the rack is fixedly arranged in the long groove. The sealing ball and the force transmission ball set are arranged in the round pipe and located between the spring and the rack; the gear and the winding shafts are coaxially and fixedly connected; and when the rack is fixed through a shearing pin, the rack and he gear are in the non-meshing state, and when the rack descends, the rack can be meshed with the gear. A plurality of force transmission components are utilized for carrying out energy efficient transmission, the retracting stroke of a safety belt is increased, and the retractor is simple in structure and low in manufacturing cost.

The invention discloses a united optimization scheme of relay node selection, power transmission and modulation mode, and the united optimization scheme of the relay node selection, the power transmission and the modulation mode is used for minimizing total power consumption of a sensor network. The energy-saving transmission scheme of the opportunity relay system puts forward a calculating method and a relay node selection method enabling the total network power consumption to be minimal under the condition that requirement of error rate of target nodes is met and maximal transmitting power of the nodes is limited. The energy-saving transmission scheme of the opportunity relay system comprises steps as below: all nodes calculate the transmitting power and the modulation mode in a distributed mode, the node which obtains the minimal total network power consumption obtains the right to broadcast information in priority (the information of the broadcast comprises transmitting power and modulation mode of the source node), the source node determines the transmitting power and the modulation mode according to received information, transmits signals in a distributed space-time encoding mode, and the relay node which obtains the minimal total network power consumption decodes the information from the source node and passes the information forward.

The invention discloses a radio energy efficient transmission method based on a PCB coil. The transmission distance of PCB coil wireless transmission is also limited by the transmission efficiency. The invention is as follows: Step 1, calculating the inductance value L of the sending coil and the receiving coil; 2, calculating the parasitic resistance value R of the transmitting coil and the receiving coil; 3, calculate that parasitic capacitance value C of the transmitting coil and the receive coil; Step 4, establishing the relationship between the transmission efficiency eta and the input frequency f, and determining the input frequency fa corresponding to the maximum input efficiency eta max. An alternating current having a frequency of fa obtained in step 4 is input to the transmissioncoil. The transmitting coil and the receiving coil are mutually inductive, and the receiving coil outputs alternating current. The invention improves the efficiency of the radio energy transmission by optimizing the frequency of the input AC power when the radio energy transmission of the PCB coil is carried out.

The invention discloses a wireless ad hoc network energy-saving transmission method, which comprises a wireless ad hoc network with a central control node, and comprises the following steps that: 1) the central control node of the wireless ad hoc network acquires neighbor node routing tables of all communication nodes, and acquires routing information of the whole wireless ad hoc network through analysis and calculation; 2) when the residual electric quantity of the communication node is lower than a preset electric quantity threshold or the average throughput of the communication node is lower than a preset throughput threshold in a preset time window, a dormancy application is sent to the central control node; and 3) after receiving the dormancy application of the communication node, the central control node judges whether the communication node is a communication necessary node or a replaceable node exists, and if the communication node is an unnecessary node, the dormancy application of the communication node is allowed. According to the invention, under the condition that the network transmission function is not influenced, the nodes with low transmission quantity and low electric quantity are dormant, so that the energy consumption is reduced.

The embodiment of the invention provides a method and a device for energy-efficient transmission of treatment data in a heterogeneous network. A specific execution mode of the method comprises the following steps of: determining current operation attribute information of the heterogeneous network; according to the current operation attribute information of the heterogeneous network, selecting a transmission mode suitable for the heterogeneous network from a plurality of preset transmission modes, wherein the plurality of preset transmission modes include a single macro base station MBS mode, a single micro base station mBS mode, a single collaborated multi-point joint processing CoMP-JP mode, a mixed mode of any two of the three modes and a mixed mode of the three modes; and transmitting data in the heterogeneous network with the determined transmission mode. According to the execution mode, energy consumption of base stations can be reduced, and energy utilization rate of the heterogeneous network can be improved.

The invention discloses a visible light communication system, which is characterized in that the system comprises a signal distribution and processing device. The signal distribution and processing device is connected with at least one visible light communication module. The visible light communication module is connected with a fixed adapter and a mobile adapter. The fixed adapter is provided with a plurality of fixed terminals; and the mobile adapter is provided with one mobile terminal. The system has the advantages of being high in efficiency and energy saving, high in transmission rate and good in security; and meanwhile, the system is suitable for special occasions, such as radio frequency sensitive areas and military areas having high security requirement.

The invention relates to a traceability data energy-saving transmission method in the field of wireless sensor networks. According to the method, a coding mode of a time channel taking pseudo packet identifier arrangement of a data packet and data field size change of the data packet as media is used as a transmission method; namely, the node converts the traceability information to be transmittedinto the pseudo packet identifier arrangement of the data packet and the size of the data packet for transmission, and a base station recovers the traceability information according to the pseudo packet identifier arrangement of the data packet and the size of the data field of the data packet. Compared with the prior art, the method has the advantages that more energy is transmitted on the basisof the original bandwidth; traceability information can be efficiently transmitted, so that the effect of saving energy and bandwidth is achieved; the influence of timing dormancy and awakening conditions of nodes is avoided; and the application range is wide.

The invention relates to an LED illuminating system with a space optical communication function. The LED illuminating system comprises a light wireless communication module, an LED illuminating module and an intelligent illumination control module. The LED illuminating system is characterized in that the light wireless communication module comprises a light emitting module and a light receiving module, the light emitting module is connected with the LED illuminating module, the light receiving module is arranged under an optical antenna, and the light wireless communication module is connected with the LED illuminating module through the bus of the intelligent illumination control module. The LED illuminating system with the space optical communication function is advantaged in that the LED illuminating system is efficient and energy-saving, and is fast in transmission rate, high in safety and low in cost, and can carry large data size and the like.

A method of transmitting a signal in a wireless communication network from a transmitting device to a receiving device, wherein said receiving device comprises an Analog to Digital Converter, ADC, arranged to sample a received signal at a predetermined sampling frequency. The method comprising the steps of generating (20), by said transmitting device, said transmission signal, wherein a bandwidthof said transmission signal is such that aliasing components will be created by said ADC upon sampling said transmission signal, and wherein said transmission signal is generated in such a way that the aliasing components have a same phase as a corresponding sampled low frequency component of said transmission signal thereby contributing constructively to said low frequency component of said transmission signal, and transmitting (40), by said transmitting device, said transmission signal to said receiving device.

The invention relates to an energy-efficient transmission device, comprising a speed reducer, a hand wheel, a transmission shaft, an adjusting support and a base plate, wherein the upper end of an output gear in the speed reducer is installed on the upper end of a speed reducer box through a bearing I, the lower end of the output gear penetrates the speed reducer box and is installed in a through hole in an underframe located at the lower end of the speed reducer box through the bearing I, the underframe is mounted on the base plate, the axial center of the output gear is provided with a through hole, the transmission shaft is in internal connection with the through hole of the output gear and can move up and down in the axial through hole of the output gear, the upper end of the transmission shaft is sleeved by the adjusting support, the hand wheel is connected with thread at the outer surface of the upper end of the transmission shaft, and a bearing II is arranged between the hand wheel and the adjusting support. The energy-efficient transmission device has a simple structure and is easy to assemble; when the concentration of sludge in a sewage treating pool is too high or too great, the transmission shaft is lifted by rotating the hand wheel, so a scraping arm is lifted, contact strength of a scraper plate and sludge is reduced, and overload damage of the speed reducer is avoided.