Abstract:
A switching method and device for a visible-light communication device and a terminal device at an access point, comprising: configuring different identification codes for visible-light communication devices; when a terminal device satisfies a switching condition, its original access point selecting a visible-light communication device whose signal quality is higher than that of the original access point as a target access point according to a peripheral access list, sending its capability to the target access point, and initiating a switching request; the original access point selecting an operating mode according to an indication of the target access point to notify the terminal device, and forwarding response fed back by the terminal device to the target access point; and when receiving response for the switching request fed back by the target access point and downlink resource allocation information, the original access point sending a switching command to the terminal device to switch.
Abstract:
A receiving device for a multi-input multi-output (MIMO) visible light communication system includes a collimation unit, a metal thin film, a transparent substrate and a receiving unit. The receiving device performs receiving by using optical components, and uses the metal thin film as a main receiving component, which plays a role of filtering and enhanced transmission, and equals to implementing a function of filtering and signal amplification by using electronic components, but overcomes the nonlinear effect of the electronic components, thereby solving the problem of waveform distortion in receiving.
Abstract:
A visible light communication MIMO system and a method for realizing data transceiving therefor are disclosed. The method includes: converting data of a sending end into two-dimensional code information containing locating information through light intensity modulation and compilation to send; a receiving end scanning received two-dimensional code information, and rectifying the received two-dimensional code information according to the locating information; and demodulating the rectified two-dimensional code information to obtain data. In the embodiments of the present document, the rectification on the image with the geometric distortion is implemented by using the two-dimensional code technology, and the rectification on the plane image sent by an LED array in the visible light communication MIMO system is implemented, which guarantees that pixels of various points within one frame of image are simultaneously and correctly detected, and achieves the object of sending and receiving frames synchronously, thereby improving the data transmission efficiency.
Abstract:
Disclosed are a dimming method, a dimming device and a computer storage medium. The method comprises: segmenting, on a Media Access Control (MAC) layer, a MAC Service Data Unit (MSDU) into multiple sub-MSDUs of the same length; encapsulating the sub-MSDUs after the segmentation into separate MAC Protocol Data Units (MPDUs), and separately generating a Compensation Frame (CF) for each MPDU according to a target brightness value of a light source; and aggregating the MPDUs and the CFs into a Physical Layer Service Data Unit (PSDU) of a Physical Layer Protocol Data Unit (PPDU) and transmitting the PPDU.
Abstract:
Disclosed are a multi-band wireless communication method, a coordinating device and a network, wherein the method is applied to a coordinating device that supports multi-band communication, wherein the coordinating device manages a node resource information table, and the node resource information table includes terminal information of a subnet where the coordinating device is located and other subnets; the method includes: the coordinating device receiving a link establishment request; the coordinating device responding to the link establishment request according to the node resource information table, instructing transmitting and receiving ends to establish a point-to-point connection or coordinating to establish relay links between the transmitting and receiving ends; and receiving and forwarding received data packets when the coordinating device is a relay node.
Abstract:
Provided are a light dimming method for alleviating inter-frame flicker and dimming device. The light dimming method includes that: an average luminance value Avgdata when a sender sends physical frames is calculated; whether inter-frame flicker is generated when the sender sends data or not is judged according to a ratio of Avgdata to an average luminance value Avglight in an illumination state; and if the inter-frame flicker is generated when the sender sends the data, the sender inserts a dimming frame in an idle pattern, wherein the dimming frame is used for compensating for a luminance difference between Avgdata and Avglight. A value of a duty cycle of the physical frame sent to regulate the luminance of the light source in the idle pattern of the sender is within a certain range, and is not required to be accurately equal to a duty cycle of a line coding method adopted for a physical layer.
Abstract:
Disclosed are a method for establishing a millimeter wave wireless communication link and a terminal device, wherein the method includes: a terminal source sending an omnibearing request to send (ORTS) to a terminal sink, location information of the terminal source relative to a mediation device obtained by the terminal source performing signaling interaction with the mediation device being carried in the ORTS; after sending the ORTS, if a directional clear to send sent by the terminal sink according the location information is received, the terminal source determining a direction of the terminal sink according to an angle of arrival of the directional clear to send, establishing a line of sight link with the terminal sink; if an omnibearing clear to send sent by the terminal sink is only received, the terminal source establishing a relay link with the terminal sink by using the mediation device as a relay node.
Abstract:
A method and a device for processing wireless body area network data, the method is applied to a processing device for wireless body area network data and comprises: receiving or generating sampled value reference ranges; receiving sampled data from an acquisition device of wireless body area network data, and judging a sampled value reference range to which the sampled data belong according to a sampled value of the sampled data; and processing the sampled data according to the sampled value reference range to which the sampled data belong. Through the embodiments of the present document, degrees of importance of the sampled data can be automatically differentiated and the data processing efficiency is improved under the situation of limited resources.
Abstract:
A method and apparatus for implementing dimming are disclosed. The method includes: at an MAC layer, dividing an MSDU into two or more sub-MSDUs with a same length; encapsulating each sub-MSDU obtained after dividing into a separate MPDU, and generating a compensation frame for each MPDU; and aggregating the MPDUs and the compensation frames with the same addresses into a PSDU part of a PPDU and transmitting a physical frame.
Abstract:
The disclosure discloses a method, device and system for managing a communication link, and a computer storage medium. The method includes that: according to the path quality of different transmitting directions of a received signal and the path quality corresponding to a receiving direction of the signal, a sink device determines transmitting and receiving directions of a communication link (101); and the sink device establishes the communication link according to the determined receiving direction (102).