83results about How to "Reduce communication frequency" patented technology

Provided are a system and a method for reducing a communication load of an apparatus for tracking a moving object. The system includes: an estimated necessary time calculating unit receiving a current location and an arrival location of the moving object from a terminal included in the moving object, calculating estimated necessary time for the moving object to reach the arrival location, and transmitting the estimated necessary time to the terminal; and a communication path on-off controlling unit activating a communication path for the terminal to receive the estimated necessary time from the estimated necessary time calculating unit, and inactivating the communication path when the terminal receives the estimated necessary time through the communication path.

A vehicle communication system includes an onboard apparatus, a mobile device, and a key issuing apparatus provided outside the vehicle for issuing a key for cryptographic communication between the mobile device and the onboard apparatus. The mobile device and the onboard apparatus store the key, and perform the cryptographic communication using the key. The key issuing apparatus issues, to the onboard apparatus, the key and validity information indicating validity of the key. The onboard apparatus includes a determination section determining whether a validity ends, and an update request section transmitting a key update request to request the issuance of a new key. When the key update request has been received, the key issuing apparatus issues a new key to the mobile device, and issues a new key and validity information on the new key to the onboard apparatus.

This invention relates to the orientation/navigation technique field of the remove set, its aim is that it provides a sort of real-time map matching method and system which bases the relative coordinate orientation. It resolves the technical problem that the map data is insecurity and the traffic is high in the existing technique. Its realized project is that: Append a judgement unit of the reference point in the customer end which is used for dividing the absolute coordinates into the coordinate of the reference point and the coordinate of the non-reference point. For the coordinate of the reference point, the customer end sends it to the server and progresses emendation and/or encrypting disposal in order to create the coordinate of the reference point which can match. For the coordinate of the non-reference point, the relative fixed coordinate which is used for the map matching is calculated and obtained by the customer end according to a latest reference point and a reference point which can match. This invention depresses greatly the communication frequency between the customer end and the server, and reduces the network traffic. In the precondition that ensure the security of the encrypting arithmetic, it provides the function of the real-time map matching in the method of high efficient for the car orientation/navigation system.

The invention discloses a control device for a solar heat-collecting project, which comprises a plurality of solar heat-collecting devices, wherein each solar heat-collecting device is respectively configured with a single chip controller and further comprises a master monitor-management server and a user access platform; the master monitor-management server is in series connection with a network exchanger, and the network exchanger is in communication connection with each single chip controller through the Internet network; the user access platform is in series connection with a gateway router, and the gateway router is interacted with the master monitor-management server through the Internet network; the master monitor-management server comprises a network controller, a webpage information publisher and a water heater parameter monitor; and therefore, the internet is used by the control device to perform centralized single-wire remote monitor on the solar heat-collecting device installed in large area through the webpage, the degree of automation is high and the operation is convenient.

The invention discloses a novel ocean iridium-satellite GPS beacon. A power control layer comprises a battery charging and discharging protective circuit, a 5V power voltage stabilizing circuit and a 3.3V power voltage stabilizing circuit; a circuit mainboard layer comprises an MCU circuit, a reset circuit, a high-speed crystal oscillator, a low-speed crystal oscillator, a JTAG debugging interface circuit, an iridium satellite module circuit, a Zigbee module circuit, an analog switch circuit, an AD voltage collection circuit and a water level monitoring circuit; a switch control layer comprises a solar charging and discharging controller, an LED control circuit and a water density knob switch; an antenna positioning layer comprises a power switch, an iridium satellite antenna, a Zigbee antenna, a GPS module, a water outlet detection switch, a charging port and a reset button; and a solar cell panel and LED layer comprises a solar cell panel and LED lamps. Functions including satellite positioning, wireless positioning, LED warning, real-time water outlet monitoring, charging of the solar cell panel and real-time electric quantity display are integrated in the novel ocean iridium-satellite GPS beacon.

The invention provides a method for protecting position privacy based on a cache. According to the current position of a mobile user, information point data quite high in using possibility in future is cached, a client side first retrieves the local cache to solve user inquiry, the cache misses the hit, then the inquiry is sent to an LBS server, the processing rate of inquiry is increased, meanwhile, the communication frequency between the client side and the server is reduced, and user privacy protection is enhanced. The invention further provides a distance hierarchical tree index structureand a maximum distance replacement algorithm suitable for the cache. The rate can be effectively increased when the cache is retrieved, and the cache hit ratio is increased. The method is simple in realization process and easy to operate.

Provided is a synchronization system comprising a first synchronization device and a second synchronization device which carry out synchronization processing by transmitting and receiving synchronization packets in accordance with a synchronization protocol and which synchronize the times thereof. The first synchronization device, which corresponds to a slave device, notifies an abnormality to the second synchronization device when an abnormality related to time synchronization processing is detected. The second synchronization device, which corresponds to a master device, increases the interval during which synchronization is performed as the length of time during which an abnormality notification is not received increases.

The invention discloses an Internet of thing water purifier intelligent control method and a computer board thereof. The things-of-internet water purifier intelligent control method comprises steps ofbinding a things-of-internet user card, connecting a network, acquiring and recording a device condition, displaying a state, and performing the communication interaction, wherein the user binding and network connection are performed by virtue of a things-of-internet card, a heartbeat packet and a communication packet are regularly transmitted to automatically check a network signal and to reconnect the network, the device state of the purifier is acquired in real time and recorded and displayed, the recording is synchronized with a cloud server, an external control device is communicated with the water purifier device, the external device controls the water purifier device to work and also performs the communication interaction with a cloud server, the communication delay time can be dynamically adjusted according to a network response speed, and the data can be updated in real time. The stability of the network can be ensured, the state of the water purifier device is recorded synchronously in real time, the water purifier device is remotely operated, the data of the server can be updated in real time and can be synchronized, the state of various water purifier device can be more precisely monitored, and the water use healthy can be better ensured.

An embodiment of the invention relates to the electronic technical field, and discloses a power saving method for a device and the device. The method comprises the following steps: the device can acquire characteristic value of target health data within a period of time, when the characteristic value is less than the preset health threshold value, indicating that the user is in a rest state, and therefore, the device can set the frequency controlling terminal communication as the target frequency, which is lower than current frequency. Through the embodiment, the device can reduce the communication frequency with the user when the user is in the rest state or sleep state, thus the power consumption of the device can be reduced and the service life of the device is prolonged.

The invention discloses a UWB and GPS integrated positioning system and method. The system comprises a label, a UWB base station and a server, and the label comprises a UWB positioning module, a short-range communication module, a label, a GPS positioning module and a remote communication module; the positioning method comprises the following steps: searching a UWB base station by the label, and selecting and switching UWB positioning, GPS positioning, UWB+GPS positioning method or GPS+UWB positioning method according to determination of whether the UWB base station is searched and the received information sent by the server; according to the positioning method, no marker is used, the method improves the field implementation efficiency, enlarges the application range of a positioning method, improves the flexibility of UWB base station deployment, and solves problems that a transition region is large in positioning deviation or cannot be positioned, the transmission success rate is lowwhen the GPS positioning data is transmitted back through a remote communication module, and the positioning is not smooth or there is no positioning data.

The invention relates to an Internet of Things instrument low-power consumption timed remote communication method, which belongs to the technical field of Internet of Things communication and solves atechnical problem of reduction of service life of a battery caused after timed communication of an Internet of Things instrument. A technical scheme for solving the problem mainly comprises the following steps: checking whether the Internet of Things instrument reaches a timed communication moment, checking times of failure of communication, checking whether execution of timed communication is allowed, and checking a result of communication and recording related information. The method provided by the invention has the advantages of automatically performing timed communication frequency adjustment for the Internet of Things instrument according to a network state of an environment where the Internet of Things instrument is located, and remaining battery capacity, consequently reducing unnecessary communication trial, reducing meaningless electricity consumption and prolonging service life of the battery under a condition where uploaded data satisfies basic application.

The invention provides processing equipment (02) applied to a machine to machine (M2M) service. The processing equipment (02) communicates with an initiator (01) and target M2M equipment (03), receives a service message sent by the initiator to the target M2M equipment and comprises an acquisition module (21) for acquiring a working state of the target M2M equipment, a time point Tm of next time of communication of the target M2M equipment, overdue time Ta of the service message and an instruction on whether to awake the target M2M equipment forcibly, and a communication agent module (22) for processing the service message according to the working state of the target M2M equipment, the time point Tm of the next time of communication, the overdue time Ta of the service message and the instruction on whether to awake the target M2M equipment forcibly.

A communication control device for passenger protection device includes a satellite sensor unit and an ECU being connected to the satellite sensor unit via a communication line. The satellite sensor unit includes a satellite sensor main body, which detects an impact against a vehicle, and a controller, which obtains a measurement from a signal detected by the satellite sensor main body. The ECU includes a main controller which determines deployment of a passenger protection device. The controller of the satellite sensor unit is adapted to compares the measurement or a calculated value which is calculated based on the measurement with a preset reference value range, and, when the measurement or the calculated value is within the reference value range, the controller transmits a communication from the satellite sensor unit to the ECU at an interval which is longer than a predetermined time interval.

The invention discloses an online charging method, an online charging system and a charging system, and relates to the technical field of mobile communication. The method comprises the steps that the OCS (online charging system) receives a resource authorization request, sent by a business network element, for the current business of a user; the OCS obtains the usable resource of the current account of the user and the corresponding dynamic step adjustment factor; the OCS determines the resource authorization quantity for the current business of the user according to the usable resource of the current account of the user and the corresponding dynamic step adjustment factor, and transmits a resource authorization response to the business network element. According to the invention, the OCS dynamically adjusts the authorization step of the user's business, and comprehensively calculates and obtains the most reasonable authorization quantity according to all factors, thereby reducing the message quantity of interaction between the OCS and the business network element and the ABM, effectively reducing the frequency of communication between the OCS and the business network element and the frequency of communication between the OCS and the ABM, and improving the stability, processing performance and efficiency of the OCS system.

The invention discloses a vehicle broadcast communication control method based on an information physical system, and designs an event trigger broadcast control system architecture integrating state estimation, which comprises four parts, namely a multi-sensor module, a track plotting module, a state estimator and a scheduling unit. State information as accurate as possible is obtained through a state estimator according to measurement information obtained by the multi-sensor module. A vehicle interconnection communication network is formed through a scheduling unit and a track plotting module, a proper event triggering condition is designed in combination with an estimation result, and when the triggering condition is met, motion data of a vehicle is broadcasted to an adjacent vehicle. The effectiveness of the method is verified by building an unmanned driving simulation platform, and the communication capability of the method in different traffic flow scenes is evaluated by using SUMO and NS3. Experimental results show that the method can significantly reduce the communication frequency and improve the utilization rate of vehicle network resources on the premise of ensuring the vehicle state tracking precision.