18 results about "Broadcast range" patented technology

The application relates to the technical field of vehicle communication, and provides an image sharing method and device based on V2X. The method comprises the following steps: receiving an image acquisition request about a target object; determining a first broadcast range with the position of the target object as the center and a first distance as the radius; broadcasting the image acquisition request to each V2X terminal in the first broadcast range, so that each V2X terminal collects images including the target object and sends the images to the vehicle end; receiving the images sent by each V2X terminal; analyzing all the images and determining an image set corresponding to the target object. According to the application, the image acquisition request is broadcast to each V2X terminal through the V2X technology, so that the images about the target object sent by other V2X terminals at their positions are acquired, the vehicle end can acquire more detailed and comprehensive information of the target object, meanwhile, the vehicle end does not need to stop, drive at a low speed or extra detour, and the driving safety is ensured.

The invention discloses a method and a system for efficiently establishing a controlled interception area based on location information perception, and the method abandons the traditional flooding indifference forwarding logic, takes node location information as a core judgment basis for controlling message forwarding, and achieves the directional propagation of a control message by constructing a perception boundary. A source node broadcasts an RTS frame containing a position and an included angle threshold value, a receiving node calculates an included angle between a connecting line of the receiving node and a sending node and a connecting line of a sending-destination node, and forwarding is carried out only when the included angle is smaller than the threshold value, so that directional propagation of a control message in the source-destination direction is realized. And after receiving the RTS, the destination node broadcasts a CTS frame, and the node judges a relay or a blocking node according to hop count information to complete region establishment. According to the method, the broadcast range is judged and limited through the position included angle, redundant messages are reduced, broadcast storm is inhibited, overhead is reduced, and establishment efficiency is improved.

A commissioning device can include a commissioning device controller configured to: broadcast, using a first wireless communication technology, a query signal from a location in a spatial volume that covers a portion of an area of interest within the spatial volume; receive, using a second wireless communication technology, an acknowledgement signal from a local controller, wherein the acknowledgement signal includes an identification of each of a plurality of electrical devices located within a broadcast range of the query signal, wherein the plurality of electrical devices is a subset of all electrical devices in the system; determine that one of the plurality of electrical devices is located in the area of interest; and send a validation signal to the local controller, wherein the validation signal includes identifying information about the one electrical device.

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.

The invention discloses a cross-system trusted identity authentication and secure communication method based on a distributed soft bus, and relates to the technical field of intelligent traffic and network security. Authentication and scheduling are limited in a preset geographic partition, and a temporary dominant node is elected by a time window, so that the consistency and the broadcast range are remarkably reduced, and the security of the distributed soft bus is improved. Queuing and oscillation of the whole network level are avoided; in cooperation with weighted voting based on reputation and resources, stable and margin node bearing authentication is preferentially selected, and the organization degree and fairness under high concurrency are improved; preloading and version binding of a hash tree identity abstract are introduced, so that first packet verification replaces whole chain verification with path verification, and calculation of a handshake critical path and IO overhead can be moved forward and stably spread in partitions in an emergency scene; and when the abstract is mismatched or suspicious, the system automatically returns to a complete certificate chain and revokes check, so that the real-time performance is ensured, and the effectiveness is not sacrificed.

A communication method and apparatus, relating to the field of communications, can reduce the difficulty of maintaining wireless parameters for a cell broadcast center and obtain updated wireless parameters in real time. In this method, a first network element registers and stores first information about a first device (access network device or mobility management network element) in the mobile network within the broadcast range of the cell broadcast center, based on a first message. This enables the cell broadcast center to send a second message to the first network element, providing the first information to the cell broadcast center, and thus allowing the cell broadcast center to complete broadcast services within the corresponding geographical area based on the first information.

The invention discloses a positioning time service method for satellite communication and related equipment. The method comprises the following steps: firstly, determining a message frame of a navigation message to be broadcasted by a satellite; the message frame comprises a plurality of message subframes; the target time slot corresponding to any one of the plurality of message subframes is used for broadcasting the message data of any one message subframe, and the remaining time slots except the target time slot in the time domain where the target frequency subband corresponding to any one message subframe is located are used for broadcasting the ranging code of any one message subframe; and then, for each message subframe in the plurality of message subframes, broadcasting a navigation signal of the message subframe to the terminal on the target frequency sub-band corresponding to the message subframe. The method comprises the following steps: determining a target frequency sub-band of each message sub-frame of a navigation message, setting a target time slot corresponding to each message sub-frame as message data of a broadcast message sub-frame, and setting residual time slots, except the target time slot, of a time domain where the target frequency sub-band corresponding to each message sub-frame is located as broadcast ranging codes; the Doppler ranging precision can be improved.

This disclosure relates to an electronic tag identification method, a reader chip, an electronic tag chip, and a system, belonging to the field of near-field communication technology. It can quickly identify the binding relationship between a reader chip and an electronic tag chip, and locate the reader chip. The electronic tag identification method includes: broadcasting a binding code, which triggers electronic tag chips within the broadcast range of the reader chip to send an identification code to the reader chip; the identification code is determined based on the identity information of the electronic tag chip; receiving the identification code sent by the electronic tag chips within the broadcast range; determining a first comparison result based on whether the received identification code matches the target identification code of a target electronic tag chip, at least based on the first comparison result determining that the target electronic tag chip is within the broadcast range of the reader chip, wherein the number of bits in both the binding code and the identification code is less than the number of bits in the identity information of the electronic tag chip.

The invention provides a mobile ad hoc network communication method and related equipment. The mobile ad hoc network communication method comprises the following steps: determining a mobile ad hoc network type; in response to determining that the mobile ad hoc network is a non-sparse mobile ad hoc network, determining a source node, a destination node, source node position information and destination node position information in the non-sparse mobile ad hoc network; determining a broadcast range according to the source node position information and the destination node position information, determining a next hop node according to the broadcast range, and performing communication according to the next hop node; and in response to the fact that the mobile ad hoc network is determined to be the sparse mobile ad hoc network, performing communication through a replication-based routing protocol.

The present application relates to the technical field of wireless communication, in particular to a kind of ultra-wideband concurrent identification method and system, applied to base station, and base station wireless covers multiple tags, comprising: receiving the data packet sent from tag;Data packet is pre-registration packet, and time slot number is allocated to tag and delay time is calculated, and it is sent to tag by allocation time slot packet;Data packet is point-to-point ranging packet, and update register and send ranging response packet;Data packet is broadcast ranging packet, and the time slot number occupied by tag is marked in register, and ranging response packet is sent;Data packet is ranging end packet, and the distance with tag is calculated.The present application can be applied in mine environment, and base station and tag do not need to be strictly time synchronized, and system positioning capacity is higher.Simplify the cumbersome registration process of previous tag, improve system time utilization, and reduce the waiting time of tag by optimizing tag registration process, the present application improves the registration rate per unit time of system and the overall stability of ranging.

This application discloses a message transmission and control method and apparatus to solve the problem of low overall V2X communication efficiency caused by overlapping and interference between multiple Roadside Units (RSUs) due to their default maximum transmit power. The message transmission control method provided in this application includes: acquiring the location information of multiple Roadside Units (RSUs); determining a message broadcast range reference value for the multiple RSUs based on the location information; and notifying the multiple RSUs of the message broadcast range reference value.

The application discloses a cross-system trusted identity authentication and secure communication method based on a distributed soft bus, and relates to the technical fields of intelligent transportation and network security. The application limits authentication and scheduling within a preset geographical partition, and elects a temporary leading node in a time window, thereby significantly reducing consistency and broadcast range, avoiding network-level queuing and oscillation. In combination with weighted voting based on reputation and resources, the application preferentially selects stable and surplus nodes to bear authentication, and improves organization degree and fairness under high concurrency. The application introduces preloading and version binding of a hash tree identity digest, replaces whole-chain verification with path verification for first packet verification, and in a burst scenario, can move the calculation of a handshake key path and IO overhead forward and stabilize the propagation within a partition. When the digest is mismatched or suspicious, the application automatically falls back to complete certificate chain and revocation check, thereby guaranteeing real-time performance without sacrificing effectiveness.

The invention discloses an information processing method, a related device, equipment and a storage medium, and is applied to the field of map processing. The method comprises the steps of obtaining first object information corresponding to a target virtual object at a first moment, wherein the first object information at least comprises first position information of the target virtual object; k cells are obtained according to the first position information, the K cells comprise at least one of top-layer cells and bottom-layer cells, the top-layer cells belong to cells in a top-layer view grid, the top-layer view grid is obtained by dividing based on an original map, the bottom-layer cells belong to cells in a bottom-layer view grid, and the bottom-layer view grid is obtained by dividing based on the original map; the bottom-layer view grid is obtained based on top-layer cell division; and broadcasting the first object information according to the K cells. According to the invention, the implementation logic is simple, the maintenance cost is relatively low, and the broadcast range can be effectively controlled, so that the consumption of equipment performance is reduced.

A system wirelessly receives identification of a reportable navigation event from one or more vehicles, the identification including vehicle location information. The system determines a locality to which the reportable event applies. The system determines one or more television broadcast stations predefined as having a broadcast area that covers the locality. Additionally, the system defines navigation data for vehicle navigation systems to address the event and deliver the navigation data to the determined television stations, along with broadcast instructions for the television stations to broadcast the navigation data via Advanced Television System Committee (ATSC) technology.

This invention discloses a voice intercom system supporting hierarchical relationships and adjacency awareness, relating to the field of wireless communication technology. It includes a cloud server and several user terminal devices. Each user terminal device includes: a communication module for establishing data transmission channels between the current user terminal device and the cloud server, as well as other user terminal devices; an adjacency awareness module for generating and broadcasting the local broadcast signal of the current user terminal device, and also for scanning the peer broadcast signals of other user terminal devices within the effective broadcast range; a local relationship database for storing a friend list, which includes several friends and a unique device identifier corresponding to each friend; a relationship management module for managing the local relationship database; and a policy control module for executing voice link management decisions. This solution can significantly improve the resource scheduling efficiency and user experience of the voice intercom system.

The application provides a rail transit dispatching system, a communication method and related devices thereof. The communication method of the rail transit dispatching system comprises the following steps: a wireless forwarding device arranged on a rail broadcasts device position information, so that a vehicle-mounted station in a broadcast range of the wireless forwarding device receives the device position information, the position of the vehicle-mounted station is determined according to the device position information, and vehicle-mounted station position information of the vehicle-mounted station is sent to the wireless forwarding device; the wireless forwarding device forwards the vehicle-mounted station position information to a dispatching station, so that the dispatching station displays the position of the vehicle-mounted station, and the dispatching station can communicate with the vehicle-mounted station through the wireless forwarding device. The method provided by the application can reduce the construction difficulty and construction cost of the rail transit dispatching system.

The invention discloses a water level detection emergency broadcasting device which comprises a mounting frame fixedly mounted at the top of one side of a water level dam, a supporting frame is fixedly mounted at the top of the mounting frame, and a supporting disc is fixedly mounted at the top of the supporting frame. According to the invention, the emergency loudspeaker broadcast work can be automatically started, so that residents can take preventive measures in advance or evacuate emergently after being notified by the broadcast, and the situation of flood hidden dangers caused by rising of water level can be effectively prevented; the adjustment of the circumferential direction of the emergency loudspeaker broadcast body and the adjustment of the left-right elevation angle position of the emergency loudspeaker broadcast body can be carried out at the same time, so that the range of the emergency broadcast can be expanded, and the situation that some resident address positions cannot be notified by broadcast due to remote places can be effectively prevented; therefore, the emergency situation that the water level rises can be spread to each resident home more efficiently, the limitation that the emergency broadcast range is small in the past is greatly reduced, and popularization and use are facilitated.

The present disclosure relates to an electronic tag identification method, a reader-writer chip, an electronic tag chip and a system, and relates to the technical field of near field communication. The method can quickly identify the binding relationship between the reader-writer chip and the electronic tag chip, and position the reader-writer chip. The electronic tag identification method comprises the following steps: broadcasting a binding code, the binding code being used to trigger the electronic tag chip within the broadcast range of the reader-writer chip to send an identification code to the reader-writer chip, the identification code being determined according to the identity information of the electronic tag chip; receiving the identification code sent by the electronic tag chip within the broadcast range; determining a first comparison result according to whether the received identification code matches a target identification code of a target electronic tag chip; and determining that the target electronic tag chip is within the broadcast range of the reader-writer chip according to at least the first comparison result, the bit number of the binding code and the identification code both being less than the bit number of the identity information of the electronic tag chip.