78 results about "Wireless broadcasting" patented technology

The present invention discloses a method for identifying vehicle paths on highways, which belongs to the field of electronic communication technology for highways. The method comprises the following steps: S1, a vehicle enters the highway through an ETC gantry at a highway entrance, the ETC gantry transmits path identification point information to an OBU via an RSU radio frequency device, and transmits the information to an on-board path identification system via the OBU; S2, a message broadcast receiving module and a comparison broadcast receiving module on the on-board path identification system respectively receive broadcast signals of a message broadcast base station and a comparison broadcast base station in a broadcast system, and an on-board broadcast device normally plays audio converted from the broadcast signals transmitted by the message broadcast base station; the method can calculate the precise driving route of the vehicle according to the positions of the message broadcast base station 11 and the comparison broadcast base station 12, and utilizes the existing wireless broadcast system, thereby greatly reducing cost investment, improving the accuracy of calculation of the ETC charging system, and ensuring the interests of users.

The invention relates to a wireless broadcast connection system and method and a method for automatically configuring an emergency alarm area. The system comprises a wireless broadcast receiving device and an intelligent terminal, the wireless broadcast receiving device is configured to be used for receiving broadcast signals and wirelessly transmitting broadcast audio streams to the intelligent terminal, and the wireless broadcast receiving device comprises a broadcast receiving processing unit, a wireless communication module and a digital signal processing unit. The digital signal processing unit is connected with the broadcast receiving and processing unit and the wireless communication module, and is used for encoding the digital audio signal into an audio stream in a compressed format and carrying out transmission buffer management on the audio stream; wherein the digital signal processing unit is provided with a self-adaptive transmission control module, and the self-adaptive transmission control module has a bidirectional communication capability and is used for receiving a playing buffer area state feedback signal from the intelligent terminal and dynamically adjusting the transmission rate of sending the compressed audio stream to the intelligent terminal according to the feedback signal; therefore, synchronous control of buffer areas of a sending end and a receiving end is realized.

A system and method for enabling a sensor attached to a moveable item to wirelessly broadcast data signals in an unrestricted area or zone while simultaneously ensuring that the sensor attached to the moveable item stops wirelessly broadcasting the data signals in a classified area or zone, where the sensor is configured to harvest ambient or other RF energy. The system and method include a barrier infrastructure for positioning in the unrestricted area or zone.

The invention relates to the technical field of wireless broadcast frequency adjustment, in particular to a target equipment wireless broadcast frequency dynamic adjustment method and device, a medium and equipment. The method comprises the steps of obtaining smooth environment temperature data of an environment where target equipment is located once every time a preset temperature collection time point is reached; if Tcu-Tcu-1 is greater than delta T, and tcu-tcu-1 is greater than delta t, skipping to determine an algorithm according to Tcur and a preset wireless broadcast frequency, and updating the wireless broadcast frequency of the target equipment; and otherwise, skipping to continue working at the wireless broadcast frequency currently corresponding to the target equipment. According to the invention, the normal operation of equipment and the stability of wireless communication are ensured. The frequent switching of the wireless broadcast frequency is avoided; and the energy consumption optimization is realized.

The invention provides an unmanned ship group control method and system for ocean-crossing sailing, and the method comprises a wolf pack behavior simulation model which constructs a multi-level distributed command structure for unmanned ship formation, and the multi-level distributed command structure comprises three levels, namely an alpha wolf, a beta wolf and an Emega wolf; according to the position data, the ocean current model and an energy consumption minimization criterion, unmanned ship route planning is carried out, and an optimal route is planned by an alpha wolf through an internal rule and dynamic adjustment is carried out; and sailing and / or combat are / is carried out according to the unmanned ship track and the multi-level distributed command structure, a local wireless broadcasting mode is adopted, alpha wolves and beta wolves broadcast state instructions in a fixed period, the Omega wolf response frequency is low, and communication is carried out only when the task state is activated. According to the invention, autonomous navigation of the unmanned ship cluster can be realized under the condition of no central node control, target identification and tactical division cooperation are realized, and low-energy-consumption and high-precision path control in a cross-ocean long-voyage environment is realized.

This application discloses a digital car key, a vehicle communication system, and a method. The digital car key may include a power supply module, a sensor, and a first wireless communication module. The sensor is coupled to the power supply module and the first wireless communication module to collect movement data of the digital car key and send the movement data to the first wireless communication module. The movement data includes movement speed and movement direction. The first wireless communication module is used to scan a first wireless broadcast signal emitted by a target vehicle and pair with the target vehicle to send movement data to the target vehicle, thereby determining the current distance between the digital car key and the target vehicle. Implementing the method of this application, by using the movement data of the digital car key to assist in determining the distance between the digital car key and the vehicle, helps to solve the problem of inaccurate distance measurement caused by obstacles in the transmission path of the wireless broadcast signal or sudden changes in the measured distance within a short period of time.

The embodiment of the invention discloses a communication method and device, temperature measuring equipment, a distribution box and a system. In the embodiment of the invention, the temperature measuring equipment acquires the communication connection state with the first distribution terminal after determining the temperature data packet every time, and sends the wireless broadcast information carrying the temperature data packet when the communication connection state between the temperature measuring equipment and the first distribution terminal is disconnected; and sending the temperature data packet to the server by the second distribution terminal in the broadcast range of the temperature measuring equipment. Wherein the first distribution terminal is a distribution terminal bound with the temperature measuring device, and the second distribution terminal is a distribution terminal belonging to the same distribution group with the first distribution terminal. Therefore, the second distribution terminal helps the first distribution terminal to send the temperature data packet to the server when the communication connection between the first distribution terminal and the temperature measurement device is disconnected, and the embodiment of the invention can ensure the real-time performance and integrity of the temperature data sent to the server by the temperature measurement device, thereby better guaranteeing the user experience.

Aspects of the present disclosure are directed toward apparatuses, systems, and methods that include at least one medical device having a device transceiver configured to wirelessly broadcast a device signal including at least unique identifier data and an information system is configured to maintain an active list of medical device inventory associated with a particular emergency response vehicle, and the processor is configured to automatically determine presence of the at least one medical device.

The utility model discloses a wireless broadcast interphone with GPS positioning and a system thereof. The wireless broadcast interphone comprises a wireless broadcast transmitting unit, a bidirectional wireless communication module, a GPS receiving unit, a position data transmission module, a battery and power management unit and a central control system. The wireless broadcast transmitting unit broadcasts audio information through radio waves, the two-way wireless communication module achieves real-time voice communication between devices, the GPS receiving unit obtains device position information and transmits the device position information to the central control system, and the central control system receives and processes the position information and voice feedback and sends broadcast information and instructions according to requirements. The battery and the power management unit provide power support and have a battery electric quantity monitoring function. The system can be widely applied to scenes of large-scale activities, emergency command, security management and the like, has the advantages of wide coverage range, accurate positioning, stable communication, intelligent battery management and the like, can effectively improve command and communication efficiency, and ensures reliable operation of the system in a complex environment.

To make elevator announcements easy to hear while suppressing noise pollution. [Solution] An elevator system according to one embodiment comprises an elevator control system, a wireless announcement device installed in at least one of the elevator car or landing and capable of transmitting wireless signals containing audio data related to elevator announcements to the surroundings, a wireless signal transmitting device capable of transmitting wireless signals containing landing information to the surroundings, a mobile terminal for users of the elevator car, on which an application is installed that allows setting information related to the settings of the wireless announcement device to be set for each user, and a cloud server that is communicatively connected to the elevator control system and the mobile terminal. The user is equipped with an audio device that can receive wireless signals transmitted from the wireless announcement device and reproduce the audio data contained in the wireless signals.

A system and method for enabling a sensor attached to a moveable item to wirelessly broadcast data signals in an unrestricted area or zone while simultaneously ensuring that the sensor attached to the moveable item stops wirelessly broadcasting the data signals in a classified area or zone, where the sensor is configured to harvest ambient or other RF energy. The system and method include a barrier infrastructure for positioning in the unrestricted area or zone.

The invention provides a new wireless broadcast optimization method, device and equipment, a storage medium and a program product, and belongs to the technical field of wireless communication, and the method comprises the steps that an application function AF is internally provided with an error code corresponding table, and the error code corresponding table is used for storing the corresponding relation between the error rate and the forward error correction FEC coding proportion; receiving a real-time transmission control protocol packet reported by each multicast terminal, wherein the real-time transmission control protocol packet comprises an error rate; performing bit error rate statistics based on the geographic areas to obtain area bit error rates corresponding to the geographic areas; and determining the FEC coding proportion of each geographic area based on the bit error rate of each area and the bit error coding corresponding table. The broadcast channel state is indirectly estimated by means of feedback of the multicast terminal so as to obtain channel measurement, FEC coding is guided according to the corresponding relation between the bit error rate and the FEC coding proportion, and reliability is improved and data transmission efficiency and transmission quality are balanced on the basis of ensuring large capacity and short time delay of broadcast services.

This invention discloses an emergency power dispatching method and system based on wireless communication, relating to the field of charging management technology. The invention stores demand beacons, power supply capacity beacons, and wireless coverage status in a database. Even after a network outage or other disaster, demand contracts can still be generated and committed bids received. This ensures unique order dispatch after conflict resolution. The dispatch token carries a one-time handover code and power level restrictions to prevent fraudulent claims, duplicate deliveries, and overload. Power suppliers transmit their status en route and calculate risks to trigger reordering, reducing the probability of delayed power outages. Communication nodes are prioritized based on coverage strength and remaining power supply time, restoring coverage first and then improving overall dispatch reachability, thereby improving uninterrupted power supply for critical loads and resource utilization.

Method for detecting one or more properties of an object (11) within a motor vehicle (10), the method comprising: Determining one or more of the location, orientation, size, and type of the object (11) within the vehicle (10) using one or more sensors (42, 44, 46, 48, 50, 56, 58, 60, 62, 64, 66, 68, 70), each of the one or more sensors (42, 44, 46, 48, 50, 56, 58, 60, 62, 64, 66, 68, 70) being located inside an interior of the vehicle (10) or on an exterior of the vehicle (10); and Assess whether the object (11) is arranged in a given, cautionable arrangement, characterized by the fact that the procedure also includes: Detect whether a vehicle impact event has occurred; when a vehicle impact event is detected, wireless broadcasting of the specific location, orientation, size and / or type of the object (11); Determining an extended injury severity prediction based on the location, orientation, size and / or object type of the object (11) being broadcast; and Sending the extended injury severity prediction to one or more first responders.

The invention belongs to the technical field of wireless digital broadcast communication security, and relates to an Auracast broadcast privacy protection system supporting key distribution and access control, which comprises a channel establishment and authentication module for establishing an out-of-band security control channel; the precursor key issuing module is used for issuing a static session precursor key to the target receiving equipment and the broadcast source equipment through channel encryption; the session key generation module is used for deriving a slice session key in combination with the public synchronization factor and the precursor key; the data packaging and sending module is used for encrypting the audio by using the slice session key, assembling a data frame and sending the data frame; the local key synthesis module is used for extracting a synchronization factor and locally synthesizing a slice session key; the audio stream analysis and output module is used for decrypting the data and managing a key life cycle; and the secret key life cycle management module is used for monitoring the state through a channel and executing erasing. According to the invention, the problem of realizing low-delay dynamic encryption and instant permission revocation without relying on periodic key redistribution in wireless broadcasting is solved.

The embodiment of the invention provides a communication configuration method of an intelligent terminal and a related device, and relates to the technical field of communication. Acquiring an NFC label signal of the intelligent terminal; if the communication type is point-to-point wireless communication, configuration information is sent to the intelligent terminal, so that the intelligent terminal carries out point-to-point wireless broadcasting, and a scanning instruction is sent to the vehicle machine system, so that the vehicle machine system establishes communication connection with the intelligent terminal and carries out communication configuration under the condition that the point-to-point wireless broadcasting of the intelligent terminal is scanned; if the communication type is network access communication, configuration information is sent to the intelligent terminal, equipment scanning is carried out, under the condition that point-to-point wireless broadcast of the intelligent terminal is scanned, communication connection with the intelligent terminal is established, and network access information corresponding to the vehicle machine system is sent to the intelligent terminal; therefore, the intelligent terminal establishes communication connection with the vehicle machine system based on the network access information and performs communication configuration, user operation is simplified, and automatic communication configuration of the intelligent device is realized.

A toy or educational system includes a plurality of wireless elements and a group token. A first one of the wireless elements includes a wireless transmitter and a second one of the wireless elements includes a wireless receiver. Each of the first wireless element and the second wireless element further comprises a reader adapted to obtain group configuration data stored on the group token. The first wireless element, upon obtaining group configuration data from the group token, is configured to set a corresponding group identifier as a common group identifier. The second wireless element, after obtaining the group configuration data from the group token, is configured to set a group identifier of the second wireless element as a common group identifier and select a received data message containing the common group identifier. Thereby, the first wireless element and the second wireless element are grouped into a broadcast group.

A method of providing channel content in a broadcast content reception and distribution system includes: receiving, by a broadcast content reception device, information that identifies a channel that provides channel content, from a content player device; receiving, by the broadcast content reception device, a signal that transmits the channel content, from an antenna; receiving, by the broadcast content reception device, information that indicates a signal strength corresponding to the channel based on the signal that transmits the channel content received from the antenna; determining, by the broadcast content reception device, that the signal strength is less than or equal to a threshold value based on the information that indicates the signal strength; and transmitting, by the broadcast content reception device, a message to the content player device in response to the determining that the signal strength is less than or equal to the threshold value.

The invention discloses a wireless broadcast upgrading device and method. A master node slices firmware and then continuously broadcasts the firmware, slave nodes receive the firmware in parallel and locally reconstruct the firmware, and breakpoint resume, grouping upgrading, digital signature and version rollback are supported. According to the method, the upgrade time is shortened to a second level from a minute level of a traditional point-to-point mode while extremely low air port occupation is kept, and the method can be widely applied to scenes such as intelligent sound equipment needing large-scale, high-reliability and rapid upgrade. According to the invention, serial upgrading is changed into parallel upgrading in a wireless broadcast mode, so that the time cost of upgrading is reduced, the upgrading efficiency is improved, and the fault tolerance is improved. The problems of time cost, low efficiency and low fault tolerance of serial upgrading are solved.

The application discloses an audio-optical broadcasting alternate working system and method of a wireless fire alarm system, relates to wireless control technology of a fire alarm, and solves the technical problem that a wireless audio-optical module and a wireless broadcasting module cannot completely receive control instructions synchronously, leading to the fact that the wireless audio-optical module and the wireless broadcasting module cannot work according to predetermined control. The application forms a network by a wireless controller and a wireless audio-optical module and a wireless broadcasting module. The wireless controller is used for sending a data packet with a system timestamp. The data packet includes a wake-up message or a control instruction. The wireless audio-optical module performs clock calibration according to the wake-up message, so that the wireless audio-optical module and the wireless broadcasting module are clock-synchronized. The wireless audio-optical module and the wireless broadcasting module realize synchronous control according to the control instruction. Thus, the whole system is in a synchronous control state, the mode of synchronous starting and alternate working is realized, and the above problem is solved.

The present invention relates to a wireless broadcasting system and, more particularly, to a wireless broadcasting system which performs broadcasting through wireless communication using a low-power frequency in an ISM band that does not require separate authorization, is capable of performing broadcasting not only using main broadcasting equipment in a broadcasting room but also using mobile broadcasting equipment at any location where a wireless integrated transceiver is installed, and is capable of being easily installed, expanded, and reconfigured. The wireless broadcasting system according to the present invention comprises: main broadcasting equipment; mobile broadcasting equipment; speakers installed in respective areas; and a wireless integrated transceiver capable of wireless transmission and reception with each other, for receiving a broadcasting signal wirelessly transmitted from the main broadcasting equipment or the mobile broadcasting equipment, and transmitting the broadcasting signal to the connected speakers for output.

The invention relates to the technical field of power system monitoring, and particularly discloses a wireless-based three-phase synchronous grounding fault indication sensor in a transformer substation, which comprises a master control sensing unit and at least two driven sensing units. The master control sensing unit and the driven sensing unit are mutually independent in physical structure, form a cooperative work system in a wireless communication mode, and are respectively used for being installed on a three-phase conductor of a transformer substation busbar. The master control sensing unit and the driven sensing unit are respectively provided with a current acquisition function module, a central processing function module, a wireless communication transceiving function module, a self-energy-taking function module, a power management function module and an opening and closing type installation mechanism function module. The technical effects of high-precision three-phase synchronous acquisition, long-term maintenance-free self power supply, reliable wireless data transmission and non-intrusive rapid deployment are achieved. Through a closed-loop time calibration mechanism based on local wireless broadcasting, time synchronization errors of all sensing units are ensured to be stably controlled within 1 microsecond.

The embodiment of the invention discloses a dynamic sliding window data frame association coding method and device, a dynamic sliding window data frame recovery method and device and electronic equipment, and the data frame recovery method comprises the following steps: reading corresponding data frames and association frames from L sub-cache regions in a receiving cache under the condition that a lost data frame exists currently, carrying out recovery operation on the lost data frame; wherein a data frame corresponding to the broadcast time slot and a corresponding association frame are stored in each sub-cache region, the association frame is obtained by performing association coding on at least two of K data frames including the data frame before the data frame by the wireless broadcast sending end, and K is a coding association length.

To achieve automatic setting of communication between controllers.SOLUTION: A primary controller 1 broadcasts a first packet including floor information, an identifier of a radio communication line and monitoring object area information by radio communication, assigns an address when a transmission source address of a second packet from a secondary controller 2 is not set, and transmits by radio a third packet in which the assigned address is set as a transmission destination address. The secondary controller 2 identifies the identifier of the wireless communication line to be used by the secondary controller 2 based on the floor information and the position information of the secondary controller 2, the identifier stored in the first packet, and the monitoring target area information, wirelessly transmits the second packet including the identifier to the primary controller 1 that is the transmission source of the first packet, and sets the transmission destination address stored in the third packet as the address of the secondary controller 2.SELECTED DRAWING: Figure 1

To provide a remote unlocking system which enables a management box for storing keys for opening a facility such as an evacuation shelter to be unlocked by remote control and opened quickly.SOLUTION: A remote unlocking system includes a master station 10 and individual household receivers 11 that receive wireless broadcasts transmitted from the master station at facility 1. A management box 20 is installed outside the facility and stores keys for locking / unlocking the facility. The management box includes a box body for storing the keys, a door, a door locking / unlocking unit for locking / unlocking the door, and an operating unit for operating the door locking / unlocking unit. Following the wireless broadcast, the master station 10 transmits an unlocking signal in the form of a DTMF signal that unlocks door 22 of management box 20, and individual household receiver 11 outputs the DTMF signal received following the wireless broadcast as an audio signal. The management box 20 includes a detector for the DTMF signal output from the individual household receiver 11. If the DTMF signal detected by the detector is an unlocking signal for unlocking the door of the management box, the operating unit operates the door locking / unlocking unit based on the unlocking signal to unlock the door.SELECTED DRAWING: Figure 1

This utility model relates to the field of audio equipment technology, specifically to a digital ceiling speaker with noise detection. It includes a circular housing with a frame at the opening. A first-layer metal base plate is fixed inside the frame, and an excitation oscillator is mounted on its front. A second layer of metal isolation plates and a top-layer metal isolation plate are sequentially arranged on the back of the first-layer metal base plate. A power module and a digital power amplifier module are mounted on the back of the first-layer metal base plate. A decoder module, a wireless broadcasting module, and a noise detection module are mounted on the second-layer metal isolation plates. An audio constant-voltage output transformer is mounted on the top-layer metal isolation plate. This design integrates noise detection, digital signal processing, and constant-voltage output functions, making it particularly suitable for network digital broadcasting systems in public places such as subways and airports. Its core feature is the ability to achieve adaptive adjustment of environmental noise and expansion of network broadcasting signals through a layered modular design.

The invention provides an automobile external display communication system, and relates to the field of automobile accessories, and the system comprises a data collection module which is used for collecting multi-source heterogeneous data through an in-vehicle network and a physical perception way; the data processing module is connected to the data acquisition module and is configured to be used for operating a data fusion algorithm, performing cleaning fusion processing on the acquired multi-source heterogeneous data and generating visual display data; the external display module is connected to the data processing module and is used for performing external visual display on the visual display data through a display device arranged on a vehicle window, a vehicle body or a vehicle roof; and the communication module is connected to the data processing module and is used for sending the visual display data to an external receiving device through the Internet of Vehicles or a wireless broadcast mode. The method is used for overcoming the defects that in the prior art, warning information priority is high, the real-time response requirement is high, and warning polling or sudden traffic congestion retransmission of an in-vehicle network application layer is prone to mistaken events, and in the other aspect, a mode of communication between vehicle external display and other vehicle cameras is used for forming a vehicle-to-vehicle communication mode with low cost. The invention discloses a semantic communication system for vehicles and roads without worries of network attacks.

The invention relates to the technical field of photovoltaic distributed energy storage, and provides a photovoltaic separable battery pack mounting and testing method and device. The method comprises the following steps: respectively issuing corresponding wireless broadcast instructions to equipment in a plant assembly stage and a field installation stage through a gateway or a platform; the equipment enters a broadcast monitoring state after being powered on, receives the wireless broadcast instruction, and executes a test of a corresponding stage according to the wireless broadcast instruction; after the equipment completes the test, generating a structured test report and uploading the test report to the platform through a wireless network; and the platform judges the current state of the equipment according to the test report and provides visual feedback for technicians. The problem that a traditional testing method highly depends on manual operation and is poor in practicability is solved.

The invention provides a self-powered equipment fault detection device based on a piezoelectric energy harvesting resonance characteristic, and the device comprises a piezoelectric energy harvesting unit which is used for converting the vibration of detected equipment into a piezoelectric signal; the self-powered piezoelectric circuit is used for converting the piezoelectric signal into a power supply signal; the detection control circuit is used for keeping or lowering the power supply signal through a first control signal output end and outputting a normal state signal or an abnormal state signal through a second control signal output end; and the state broadcast circuit is jointly controlled by the self-powered piezoelectric circuit and the detection control circuit, and sends a wireless broadcast signal when the state of the detected equipment is normal, otherwise, does not send the wireless broadcast signal. According to the self-powered equipment fault detection device provided by the invention, the judgment of the state of the detected equipment and the sending of the judgment result can be realized without any external power supply and sensor.

The application discloses a narrow-band low-orbit navigation enhancement terminal OTA performance test system, which comprises a simulation control and test evaluation unit, a through guide simulation time sequence control unit, a narrow-band navigation signal simulation source, a narrow-band communication signal simulation source and a far-field darkroom. The narrow-band low-orbit navigation enhancement terminal OTA performance test system generates a through guide test scene, communication simulation parameters and navigation simulation parameters through the simulation control and test evaluation unit, and calculates and generates output time sequence control parameters through the through guide simulation time sequence control unit, realizes seamless switching and wireless broadcasting of communication signals and navigation signals, solves the problem that there is a difference between wireless broadcasting of satellite navigation signals and satellite communication signals in the existing low-orbit narrow-band through guide enhancement OTA performance test method and a real environment, leads to an incomplete test result, overcomes the limitation of a traditional wired input test mode, and improves the practicability and market adaptability of the test system.