34results about How to "Improve wireless transmission efficiency" patented technology

Disclosed are a method and an apparatus for transmitting data in a wireless LAN system. The method for transmitting data comprises the steps of: generating a master-beacon frame including identifier information of an end-point terminal connected to a relay device; and transmitting the master-beacon frame. As a result, the occurrence of a buffer overflow in the relay device can be prevented.

A method of controlling a receiver and a transmitter to handle a transmission window size change procedure is disclosed. The method includes driving the receiver to deliver a control message having a window size parameter to the transmitter for adjusting a transmission window size of the transmitter, and driving the transmitter to output an acknowledgement message to the receiver and adjust the transmission window size according to the window size parameter when the transmitter receives the control message.

The invention provides a single transmitter to double receiver vacant resource allocation method which comprises a control channel allocation process and a data channel allocation process. The control channel allocation process comprises the steps that a control channel is divided into a reserved time slot and a competition time slot in time domain; at some point, if a node needs to use a control channel and if the reserved time slot available for the node is found, the reserved time slot is directly used; and if the reserved time slot available for the node is not found, the node competes for the competition time slot with other nodes. According to the data channel allocation process, the control channel is used to negotiate a data channel which can be used. According to the invention, the multi-channel way is used to realize parallel transmission of node data, which effectively improves the network capacity; a multi-channel frequency division multiplexing technology is used, which effectively reduces mutual interference of neighbor nodes and improves the wireless transmission efficiency; and a TDMA hybrid channel access method is used, which effectively reduces the collision probability of data packets and realizes efficient packet transmission.

The invention discloses an electric automobile wireless charging system based on the Internet of Things. The electric automobile wireless charging system based on the Internet of Things comprises a power supply end, a power supply controller and a power receiving end, wherein the power supply end comprises a network source, a distributor, a microwave power source, a waveguide tube and a microwave transmitting array antenna, the network source, the distributor, the microwave power source, the waveguide tube and the microwave transmitting array antenna are connected in sequence, the distributor and the microwave power source are arranged in a lamp pole of a street lamp, the distributor is connected with the underground network source through a coaxial cable, an antenna support is arranged on the side, facing a road surface, of the lamp pole of the street lamp, the transmitting array antenna is arranged at the outer end of the antenna support, the waveguide tube is arranged in the antenna support, the power supply controller is connected with the distributor and the microwave power source, the power receiving end comprises a wireless microwave receiving antenna and a rectification electric energy receiver connected with the wireless receiving antenna, power is supplied to a rechargeable battery by the output end of the rectification electric energy receiver, the control end of the rectification electric energy receiver is connected with a vehicle-mounted controller, and power is supplied to the rechargeable battery under the control of the vehicle-mounted controller. According to the electric automobile wireless charging system based on the Internet of Things, a wireless charging pole is combined with the street lamp, and the electric automobile wireless charging system capable of achieving roadside charging conveniently and rapidly is provided.

The invention provides an MEMS-micromachined planar coil-based wireless charging device and a preparation method thereof. The wireless charging device comprises a base bottom box, a base top box, a receiving coil and a transmitting coil, wherein the transmitting coil is arranged in the base bottom box and is connected with a rectifier circuit, a detection circuit, a control circuit and a drive circuit in the base bottom box; the receiving coil is arranged in the base top box and is connected with the rectifier circuit and a converter in the base top box; the receiving coil and the transmitting coil are hollow planar coils; the receiving coil is arranged in the transmitting coil; and the transmitting coil and the receiving coil are prepared by an MEMS micromachining technology. By an interpolation structure, accurate positioning can be achieved; the wireless charging efficiency is effectively improved; the loss is reduced; the radiating area is reduced; meanwhile, the wireless charging device can prevent water and withstand external mechanical collision; and charging is relatively safe and reliable.

The invention relates to a method and a system for lowering long term evolution (LTE) uplink data transmission delay. The method comprises following steps that a base state determines an LTE uplink data type; and the base station sets corresponding uplink data transmission resource predistribution amount according to the LTE uplink data type, and sends, according to the uplink data transmission resource predistribution amount, an uplink resource dispatching authority corresponding to the LTE uplink data to a terminal. Different uplink data transmission resource predistribution amounts are directly set according to different types of LTE uplink data, and UL Grant is sent to the terminal according to the uplink data transmission resource predistribution amount. Due to the uplink self-adaption resource predictive scheduling method, delay caused by an SR request and a BSR report is shortened, the transmission delay of LTE uplink data is shortened, and the wireless transmission efficiency under the long delay channel condition is improved.

The embodiment of the invention provides a Bluetooth multi-channel receiving method, and relates to the field of Bluetooth communication. The method comprises the following steps: receiving cyclic redundancy check information and load data of each Bluetooth receiving branch in multiple Bluetooth receiving branches; in one mode, when the cyclic redundancy check information in at least one Bluetoothreceiving branch is correct, determining that retransmission is not carried out. The invention further provides a Bluetooth multi-channel receiving system and electronic equipment. The number of times of retransmission of the Bluetooth system is effectively reduced, so the communication efficiency is improved, and high-quality and reliable Bluetooth information transmission is completed.

This invention relates to one data transmission method based on repeat mechanism, which comprises the following steps: send end top layer repeats control unit to generate Upper ARQ agreement data unit; the send end down layer repeats control unit to generate data series module by basic transmission unit and to generate data series block label; send end down layer repeats control unit to generate HARQ agreement data unit to send to receiver end.

The invention discloses a tumor thermotherapy device based on an implanted coil and a parameter optimization method thereof. In traditional tumor magnetic-mediated thermotherapy, it is necessary to inject heat-producing magnetic particles into the human body; and as the particles diffuse, the effect of hyperthermia decreases. The invention relates to a magnetically mediated hyperthermia device for tumors based on implanted coils, which includes internal coils and external coils. The extracorporeal coil is an open-loop single-turn circular coil. The internal body coil is a closed-loop single-turn circular coil. The radii of the external coil and the internal coil are r 1 and r 2 , the line radius is r w1 and r w2 . Among them, d is the wireless transmission distance. The invention can achieve the effect of sustainable hyperthermia on tumors.

The invention discloses an adaptive constant-voltage high-efficiency wireless power supply system, which includes an energy transmitting module, an energy receiving module, a coil module and a constant-voltage closed-loop control module, and the energy transmitting module includes an inverse class E power amplifier module and the best state of the power amplifier Adaptive module, energy receiving module includes rectifier module, voltage stabilizing module, receiving coil and capacitor, coil module includes transmitting coil, relay coil, constant voltage closed-loop control module includes Bluetooth communication module, power regulation module and PC monitoring and regulation module. The wireless power supply system of the present invention can make the power amplifier in the best working state of zero-current shutdown and zero-current derivative shutdown, improve the efficiency of wireless energy transmission, and can monitor and adjust the stimulation parameters at the PC end, and integrate data acquisition , data communication, remote control and other auxiliary functions further improve the performance of the implantable medical system and expand the scope and practicability of clinical medicine.

The wireless power transmission system based on the transmission line belongs to the field of wireless power transmission, and solves the problem that the existing magnetic coupling resonant wireless power transmission system has a complex structure due to the use of a concentrated parameter circuit network for impedance matching. The wireless power transmission system: the main transmission unit based on the long line is connected to the high-frequency power supply, the main transmission unit, the impedance matching unit based on the lossless short line, the filter unit and the magnetic coupling resonance unit are connected in sequence, and the magnetic coupling resonance unit is connected to the load . The main transmission unit is used for long-distance transmission of electric energy, the impedance matching unit is used to achieve impedance matching between the main transmission unit and the magnetic coupling resonance unit, the filter unit is used to filter out high-order harmonics, and the magnetic coupling resonance unit It is used to realize wireless power transmission between high frequency power supply and load. The transmission line-based wireless power transmission system of the present invention is suitable for high-efficiency wireless transmission of electric energy and stable power of power source and load.

The invention discloses an ultrasonic main shaft, which comprises a main shaft housing, a rotating shaft, a front end cover, a transmitting frame and an ultrasonic wireless transmitting device; the rotating shaft is rotatably installed in the main shaft housing, and a mounting hole; the front end cover is arranged on the front end of the main shaft housing and is arranged around the rotating shaft; the launcher is directly installed on the front end face of the front end cover and is arranged around the rotating shaft; The frame and the front end cover are connected by bolts for easy disassembly; the ultrasonic wireless transmitting device is arranged in the first accommodation groove, which includes a transmitting coil arranged around the rotating shaft and a transmitting ferrite for accommodating the transmitting coil. Compared with the prior art, the ultrasonic spindle has excellent performance, good processing effect, wide application range, many processable materials and long service life. In addition, the present invention also discloses an ultrasonic processing equipment using the above-mentioned ultrasonic spindle.