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2346 results about "E communication" patented technology

System, Method and Computer Program Product for Distributed User Activity Management

A system, method and computer program product for providing a user activity management system including recording activity which may include audio; video or image; screen capture; data from a sensor; location information; computer usage; electronic communications; or social networking activities; transmitting activity information to a network cloud; making available for analyzing, viewing, reporting, training, or alerting; attaching a user activity record to IT systems; or verifying user commitments. The system or method may optionally further include providing playback or supervisor review of recordings; incorporating feedback into an employee or user record; incorporating notes-to-self; or enabling selecting an activity as a best practice for training purposes.
Owner:TRANSPARENCY SCI

Intelligent home platform control system

The invention discloses an intelligent home platform control system which mainly comprises a knapp cloud platform, an intelligent control center, terminal equipment and an intelligent equipment terminal. The control center and the terminal equipment are in two-way communication. The control center and the knapp cloud platform are in two-way communication. The knapp cloud platform and an intelligent mobile phone are in two-way communication. All terminal equipment are in two-way communication. According to the intelligent home platform control system, through the knapp cloud platform, data information is collected and released to the intelligent mobile phone, a tablet computer and the control center, a convenient and easy-to-use scene editing function and lightweight application are provided at the same time, the core computation work is completed by a control center, and the standby time of the mobile phone is prolonged. Instant equipment information is achieved, a latest equipment list and current state information can be obtained timely through the control center, the complex wire distribution is avoided, the adding of new intelligent equipment by a user is facilitated, a remote application is added into the interface of the control center, and the system is more humanized.
Owner:上海纳普智能科技股份有限公司

Use of e-receipts to determine total cost of ownership

Embodiments of the invention are directed to a system, method, or computer program product for utilizing e-receipt data and other electronic communication data between a merchant and customer regarding a transaction to provide misappropriation protection based on address and / or merchant store information associated with the e-receipt or other e-communication. In one embodiment, a system is configured to: determine a purchase price paid for the product and costs associated with the product based on purchase transaction data; and determine an estimated total cost of ownership of the product based on the purchase price of the product and the costs associated with the product.
Owner:BANK OF AMERICA CORP

Power control method, user equipment, base station and communication system of dimension to dimension (D2D)

ActiveCN103139889AImplement power controlSolve the problem that the transmit power of the first UE cannot be adjustedPower managementCommunications systemE communication
The invention provides a power control method, user equipment, a base station and a communication system of dimension to dimension (D2D). The power control method comprises that a first user equipment (UE) receives path loss information sent by the base station or reference signals sent by a second UE, transmission power of the first UE is obtained through the path loss information or the reference signals, data is sent to the second EU based on the transmission power of the first UE so that the second EU obtains adjustment reference value according to the data and sends detection control information to the base station according to the adjustment reference value, and the first UE receives the power adjustment information sent by the base according to the detection control information and adjusts the transmission power of the first UE according to the power adjustment information. The power control method, the user equipment, the base station and the communication system of the D2D achieve power control of a transmitting end device in the D2D.
Owner:HONOR DEVICE CO LTD

Security patrol robot system and control method thereof

The invention discloses a security patrol robot system and a control method thereof. The system comprises a robot, a wireless network, a general packet radio service (GPRS) network and a central control system, wherein the robot and the central control system are in communication with each other in a wireless way through the wireless network or the GPRS network. The security patrol robot system integrates opto-mechatronics integration, and the robot is remotely controlled by the central control system, so that normal operation of the robot is ensured. The robot has functions of autonomous environment detection, autonomous obstacle avoiding navigation and autonomous charging, can autonomously complete tasks such as fixed route patrol, random route patrol, important position observation and the like according to specific requirements of a user under the condition of no manual intervention, and can be manually controlled remotely to patrol; and the system has omnibearing visual processing and judging capability, vision and bidirectional voice information can be remotely transmitted and monitored, environmental smoke and fire situation can be detected, and abnormity alarms can be made.
Owner:CIVIL AVIATION UNIV OF CHINA +1

Intelligent home information management system

The invention relates to an intelligent home information management system, which comprises a remote back-stage management center, a TCP / IP network system, a terminal system, a server and a local area network, wherein the terminal system comprises a terminal set and a terminal platform software system; the terminal set comprises a terminal master control module, a data packet module, a call module, a multimedia processing module, an audio and video coding and decoding module, an interface module, a terminal communication module, a driver processing module, a database and network file system application module, and an acquisition module; the remote back-stage management center comprises a master control module, a communication module, a database module, an upgrade processing module, a multimedia processing module, a magnetic card and safety management module, a management and alarm module, a call management module, a message module and a state detection module; and a multimedia integrated system master chip can realize the output of various paths of different signals. The intelligent home information management system has the advantages of high intelligent degree, high compatibility and expandability, and simple equipment operation.
Owner:深圳市麦格斯科技有限公司

Communication apparatus

A vehicular communication apparatus in accordance with the invention, which is installed in a vehicle and designed to establish bidirectional communication with a foreign moving object, comprises collection means for collecting a plurality of pieces of information obtained from the vehicle, selection means for selecting from the collected pieces of information those to be transmitted to the foreign moving object, and transmission means for transmitting only the selected pieces of information to the foreign moving object.
Owner:TOYOTA JIDOSHA KK

Authentication system and method based on intelligent mobile communication equipment

The invention provides an authentication system based on intelligent mobile communication equipment. The authentication system comprises more than one intelligent mobile communication equipment, more than one server, a client-side module and a server-side module; the client-side module is arranged in the intelligent mobile communication equipment and comprises an identification module, wherein the identification module is used for submitting an authentication request, acquiring identity information, identifying elements in the identity information and querying an authentication result; the server-side module is arranged in the server and comprises a certificate management module, an identity information management module and an authentication module and is used for realizing format and content management of various certificates, management of the identity information and authentication of effectiveness of the elements; the identity information comprises at least one element; and the client-side module and the server-side module are in data communication through a mobile communication network. The invention further provides an authentication method based on the intelligent mobile communication equipment. Due to adoption of the authentication system and method, the identity authentication can be rapidly, conveniently and accurately carried out.
Owner:ZHUHAI ZAIZHOU SOFTWARE TECH

Mobile wrist strap equipment and working method thereof

The invention discloses a piece of mobile wrist strap equipment and a working method thereof. The mobile wrist strap equipment comprises a single chip MCU (Microprogrammed Control Unit), a communication IC (Integrated Circuit), a buzzer, a vibrator, a key, an LED (Light Emitting Diode) lamp, a low-voltage checking circuit, a 2.4G communication frequency modulation circuit, an acceleration transducer, a gyroscope integrated chip, a register, a USB (Universal Serial Bus) circuit, a power supply stabilivolt, a USB charging circuit, an ionic charge battery, an infrared checking circuit and a blood oxygen checking circuit. The mobile wrist strap equipment is a piece of USB equipment with wireless transport protocols, is capable of recording motion, daily life and sleep information of a person, transmitting motion information of the person through a USB and wireless mediums, and monitoring and recording daily action and motion data and sleep information of a user. The mobile equipment displays a motion mode and the completeness of a day motion goal through LEDs without using a piece of LCD (Light Crystal Display) equipment, so that the mobile equipment is very simple and the attachment feeling of wearing is greatly decreased when the mobile equipment is used.
Owner:刘鑫

Remote unmanned aerial vehicle cluster control method and system based on 3G (the 3rd Generation Telecommunication) and GPRS (General Packet Radio Service) cell phone communication

The invention provides a remote unmanned aerial vehicle cluster control method and system based on 3G (the 3rd Generation Telecommunication) and GPRS (General Packet Radio Service) cell phone communication and belongs to the technical field of unmanned aerial vehicles. Each unmanned aerial vehicle is provided with an independent unique electronic identification code by integrating a cell phone communication module into a flight control computer board card; as long as the system is started and electrified, the current relevant information of the unmanned aerial vehicle is transmitted to a remote control center; a permission instruction is necessarily applied from a control center for each flight; information such as an airway plan is made uniformly in the control center; and the information is transmitted to an operation terminal of the unmanned aerial vehicle through a cell phone communication module. Consequently the unmanned aerial vehicle cannot fly away without a headquarter control instruction. The state of each unmanned aerial vehicle is fed back to the control center and can be shared with networked data of relevant national supervision departments so as to play roles in unified supervision and scheduling. In addition, the on-site operation personnel do not need professional knowledge such as airway point setup; and the unmanned aerial vehicle can be operated by common people subjected to simple training, so that the problem of staff shortage in unmanned aerial vehicle control is solved.
Owner:WUHAN AI BIRD UAV

System and method for operating bicycle leasing without fixed taking and returning spot

The invention relates to a system and a method for operating bicycle leasing without a fixed taking and returning spot. The system comprises a user terminal, a plurality of bicycles equipped with bicycle-mounted terminals, an operation business management platform and a bicycle handling system, wherein the user terminal is a self-owned terminal device having a communication function of a user, which is used for sending a service request to the operation business management platform and receiving a feedback result; the bicycle-mounted terminal is used for bicycle location, prevention of burglary, platform information receiving, user authentication, valuation and charging; the operation business management platform is used for receiving and responding to the user request of using a bicycle,commanding the bicycle handling system to balance the bicycle distribution density and constituting a leasing management system with the bicycle-mounted terminals; and the bicycle handling system is used for receiving the command from the operation business management platform to carry out balanced distribution management on the density of the bicycles. The system and the method for operating bicycle leasing have no limit of the fixed taking and returning spot, have the advantages of low operation cost and strong popularization performance, can enhance the road utilization rate and relieve the traffic pressure; and nearby bicycle taking and returning can be realized at any place.
Owner:顾泰来 +2

Systems and methods for medical data interchange using mobile computing devices

A method according to the present invention includes receiving data through a wired connection from a medical device by a mobile computing device, where the wired connection includes an adapter that communicates with the mobile computing device using a first communication format and the medical device using a second communication format. The method further includes formatting a message including the received data for transmission to a medical data server by the mobile computing device. This method may be practiced automatically, either continuously or at set intervals, or may be initiated by someone utilizing the system (such as the patient or health care provider. The mobile computing device can be a properly-equipped cellular telephone, PDA, or other a small, portable device that is easy for a patient to transport.
Owner:MEDAPPS

Coal-rock mass ground stress continuous testing device and method thereof

The invention relates to a coal-rock mass ground stress continuous testing device and a method thereof which are mainly used for testing the stress and change regularity of rock in place or crushed coal-rock mass. The device consists of a ground stress sensor, a data acquisition instrument and a high pressure oil pump, which can work separately and can be connected with the data acquisition instrument to work. The ground stress sensor consists of a preposing capsule pressure sensor (1), a high-pressure oil tube (2), a tee (3), an electronic digital display hydraulic sensor (4), a valve (5) and a quick change coupler (6); wherein, the capsule pressure sensor is arranged inside a borehole, and can be well coupled with the coal-rock mass by injecting oil liquid; the ground stress testing results can be directly displayed on a pressure gauge; the sensor can be directly connected with a coal mine safety monitoring system, or the data can be acquired by the data acquisition instrument for remote data transmission, or telephone wires can be used for the communication between the sensor and ground modem as well as a computer; in ground-based computer software, the ground stress data and the change regularity thereof can be looked over.
Owner:CHINA UNIV OF MINING & TECH +1

Method and system for access control of machine type communication (MTC) terminal

InactiveCN102056266ASolve the problem of increasing complexityLow costAssess restrictionNetwork data managementComputer terminalE communication
The invention discloses a method and system for access control of a machine type communication (MTC) terminal. In the access control method, firstly, a mobility management network element (MMNE) reports MTC terminal information currently requesting to be adhered to a network or currently adhered to the network to an access control network element (NE); the access control NE judges that the MTC terminal is not allowed to access in accordance with the MTC terminal information, and then sends an instruction of refusing the MTC terminal to access to the MMNE; and the MMNE receives the instruction, and refuses the MTC terminal to access to the network in accordance with the instruction. According to the access control method, only the MTC Server which is allowed to access to the network can access to a core network, and an illegal MTC Server is refused to access to the core network, thus ensuring the safety of the core network.
Owner:ZTE CORP

Access control method for machine type communication, equipment and communication system

The embodiment of the invention discloses an access control method for machine type communication, equipment and a communication system. In one scheme provided by the embodiment of the invention, a mobility management network element transmits the access control information of a machine type communication (MTC) terminal set to access network equipment; and when receiving a message from an MTC terminal belonging to the MTC terminal set in a radio resource control connection establishment process, the access network equipment performs access control on the MTC terminal belonging to the MTC terminal set according to the access control information of the MTC terminal set. By the scheme, the access control such as access grant, access prohibition, access delay and the like over given or all the MTC terminals can be realized, thereby effectively reducing the probability of occurrence of signaling congestion of core network nodes and further improving the risk resistance of a network.
Owner:HUAWEI TECH CO LTD

Communication control

A server including a storage unit for storing a history of activities that each character in a virtual world has performed; a search unit for searching the storage unit to retrieve a history of activities in which a first character that performs an activity on a first client has changed the states of a second client that performs an activity on a second client; a calculation unit for calculating, on the basis of the retrieved history, a score indicating the extent to which the first character has changed the state of the second character; and a transmission control unit for controlling the frequency with which the states of the first character are changed according to an operation performed by a user on the first client.
Owner:IBM CORP

Method for networking multiple Bluetooth devices

The invention provides a method for networking multiple Bluetooth devices. The method includes broadcasting / scanning white list configuration to constrain networking ranges; enabling the Bluetooth devices to transmit data packets by means of broadcasting during communication, allowing the other Bluetooth devices in networks to acquire data by means of scanning, analyzing the data and determining abandoning, instruction executing or forwarding processing modes for the broadcast packets according to transmitting device addresses and receiving device addresses of the broadcast packets and the times of receiving the broadcast packets. According to the technical scheme, the method has the advantages that constraints on the quantity of slave devices which are allowed to be connected with master Bluetooth devices can be broken through, Bluetooth networking device scales can be expanded, and constraints on Bluetooth networking communication scales and distances can be extended.
Owner:INST OF INTELLIGENT MFG GUANGDONG ACAD OF SCI

Identity verification system based on face recognition

The invention discloses a network device based on a customer identity verification system, which aims to solve the problem that the cases resulting from name borrow and false name happen occasionally due to the shortcomings existing in the process of manually verifying the customer identity in the current financial industry. A customer terminal consists of a group of self-service information acquisition and real-time comparison terminals which perform real-time comparison on the information acquired by a camera and a second-generation identity card reader and directly transmit the acquired information and the comparison result to a background server or forward through a middleground server; and a third-party server reads the required information and comparison result directly from the background server database through a communication interface or through the middleground server. Through the invention, the identification accuracy of the customer identity is high, and the cases resulting from name borrow and false name in the banking business are greatly reduced. In combination with the characteristics of the bank, the information can be acquired in a self-service manner and automatically identified and compared to avoid human risk in the banking business, thereby laying a firm foundation for the sustainable development of the bank.
Owner:高艳玲

Electronic-control vehicle remote diagnosis system and diagnosis method thereof

ActiveCN101706372ACar quality improvementEasy to useVehicle testingEngineeringCCP protocol
The invention relates to an electronic-control vehicle remote diagnosis system, comprising a vehicle-mounted diagnosis terminal which is respectively arranged on each vehicle and communicates with a VMS whole-vehicle controller through CAN bus; a CCP protocol module is respectively arranged in the vehicle-mounted diagnosis terminal and the whole-vehicle controller; and the vehicle-mounted diagnosis terminal reads failure information collected by the whole-vehicle controller through the CCP protocol module, and feeds the failure information back to a background monitoring service device through wireless communication network. The invention also provides a diagnosis method of the electronic-control vehicle remote diagnosis system. The invention adopts the CCP standard protocol, utilizes the vehicle-mounted diagnosis terminal to read the failure information monitored by the VMS whole-vehicle controller in real time, and sends the failure information to the background monitoring service device, thus effectively solving the problems of monitoring and failure diagnosis and the like in development and after-market operation, being beneficial to improving vehicle quality, and having convenient application and high reliability.
Owner:CHERY AUTOMOBILE CO LTD

Wi-Fi (wireless fidelity) network management method and wireless router

The invention provides a Wi-Fi network management method and a wireless router. The method comprises the wireless router randomly generating a user name and a password of the Wi-Fi network; determining a wireless mobile terminal entering a near field communication recognition region, transmitting the random user name and the password of the Wi-Fi network to the wireless mobile terminal, and acquiring a media access control address of the wireless mobile terminal; and managing and controlling the wireless mobile terminal accessing the Wi-Fi network according to the media access control address. The method provided by the invention can prevent illegal user from accessing the Wi-Fi network in public places and can prohibit artificial fishing wireless router so as to ensure the legal user to use the Wi-Fi network securely and efficiently.
Owner:ZTE CORP

Global positioning system (GPS) automobile safety information system based on internet, global system for mobile communication (GSM) and Wave&Wimax communication network

InactiveCN102673523AInstant messagingLearn about security statusAnti-theft devicesBorder crossingSecure state
The invention discloses a global positioning system (GPS) automobile safety information system based on the internet, a global system for mobile communication (GSM) and a Wave&Wimax communication network. Preset position data is arranged in a border-crossing detecting module. When an automobile moves, a GPS module generates new position data and compares the new position data with the preset position data. When a moving distance of the automobile exceeds a boarder-crossing threshold value, the automobile is moved illegally. The process achieves monitoring of a safety state of the automobile and prevents the automobile from being stolen. A real-time automobile communication system achieves delivery of various types of information including the automobile position data between automobiles and between the automobile and a user, and enables the user to know a safety state of the automobile at any time and any place and to take measures in time. The GPS automobile safety information system greatly improves safety of the automobile and achieves a vehicle-mounted instant messaging social safety wireless platform.
Owner:陈薇

Robot system based on brain-computer interface and implementation method

The invention relates to a robot system based on a brain-computer interface and an implementation method. The robot system is mainly characterized in that a brain-computer interface sub-system obtains a brain electrical signal through a measurement electrode and performs feature extraction of the brain electrical signal to obtain the intention of a user; the brain-computer interface sub-system converts the intention of the user into a control command and transmits the control command to a robot sub-system through a communication sub-system; the robot sub-system receives the control command of the brain-computer interface sub-system and controls a robot to move; the robot sub-system transmits video information acquired by self to the brain-computer interface sub-system; and the brain-computer interface sub-system forms a stimulation interface fed back to the user. According to the invention, mobility control of the robot in eight directions through the steady-state visual evoked potential brain-computer interface can be realized; furthermore, the system can control the robot rapidly and precisely without being trained; because the brain-computer interface is free from body movement participation, the user suffering from severe dyskinesia can move to an expected position; and thus, the living quality is increased.
Owner:INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI +1

Dynamic stereo monitoring system and detection method for charge surface shape in blast furnace

ActiveCN101020933AMonitor material level heightChecking devicesRadarData acquisition
The dynamic stereo monitoring system and detection method for charge surface shape in blast furnace belongs to the field of electronic measurement technology and computerized 3D technology. The dynamic stereo monitoring system includes radar, sleeves, a valve, a blast furnace, a radar data acquiring unit with a 24 channel signal access terminal board and a data acquisition board, and an imaging system comprising an industrial control computer and complementary monitoring software. The detection process includes the following steps: the real-time communication between the radar and radar data acquiring unit, converting inclined measured data into vertical curve data, and creating the 3D charge surface shape data. The present invention can realize the on-line real-time monitoring of charge surface shape in blast furnace under harsh operation condition.
Owner:北京普瑞玛仪表有限公司

Automobile ABS ECU on-line calibration system and method based on CCP protocol

The invention provides an online calibration system for an automobile ABS ECU based on a CCP protocol. The system comprises an upper computer and a lower computer which are interconnected with each other. The upper computer comprises a data storage module, a data analysis module, a control parameter optimization module, a control parameter calibration module and an upper computer command processor CCP; the lower computer is the automobile ABS ECU and comprises an algorithm module and a data communication module. The invention also provides an online calibration method for the automobile ABS ECU based on the CCP protocol. In the method, the CCP protocol is introduced into design of the calibration system of the automobile ABS ECU, which realizes online optimization and modification of control parameters of an ABS; and the control parameters are monitored in a real-time manner by a real-time message processing mechanism of the CCP protocol, which overcomes the problems of hard parameter modification, long development period and poor operability in the existing development methods.
Owner:CHONGQING UNIV OF POSTS & TELECOMM

AGV (Automatic Guided Vehicle) operation control method based on passive RFID (radio frequency identification) and aided visual

The invention provides an AGV (Automatic Guided Vehicle) operation control method based on passive RFID (radio frequency identification) and aided visual. The method is characterized in that a control center acquires the position information of an AGV on the basis of a passive RFID technology; the AGV receives a dispatching demand of a cutter distribution center on the basis of an aided visual technology; and the dynamic monitoring of the execution process of distribution tasks of the AGV, distribution plan dispatching and accurate path trace function can be realized through designing numerical workshop RFID reader layout, dispatching patterning commands and an accurate high-efficiency real-time image processing algorithm; and therefore the bidirectional communication between the control center and the AGV can be realized under the condition of not using a radio communication method. By the adoption of the AGV operation control method, the problem that the AGV cannot be controlled remotely in an occasion with high requirement on safety because radio communication cannot be used can be solved, and the dispatching communication is safe and reliable.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Automobile owner identification device, control system and control method based on near field communication (NFC) mobile phone

The invention provides an automobile owner identification device, an automobile owner identification control system and an automobile owner identification control method based on a near field communication (NFC) mobile phone and belongs to the technical field of automobiles. The invention solves the problems that the conventional automobile owner identification system is not safe and has a single function. The conventional automobile owner identification device comprises an interface unit, an automobile owner information receiving unit, a storage unit, an identification unit and an output unit. The automobile owner identification control system comprises the automobile owner identification device, a steering wheel adjusting controller, an engine controller and a controller area network (CAN) bus. The automobile owner identification control method comprises the following steps: a, making the NFC mobile phone close to the interface unit; b, waking up the automobile owner identification device, so that the NFC mobile phone and the automobile owner identification device are communicated mutually; c, identifying automobile owner information and outputting the identification result and the automobile owner information to the CAN bus; d, receiving the identification result and the automobile owner information by using each execution mechanism from the CAN bus and executing the corresponding operation; and e, finishing automobile owner identification. According to the invention, the automobile owner identification process is safe and the functions of the automobile owner identification system are enriched.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1

ETC (electronic toll collection) communication control method, multi-beam antenna, RSU (road side unit) and ETC system

ActiveCN102831657AImprove accuracyPrevent car-following interferenceTicket-issuing apparatusInterference phenomenonOn board
The invention discloses an ETC (electronic toll collection) communication control method, a multi-beam antenna, a RSU (road side unit) and an ETC system. The method comprises the following steps: a step of position detection and a step of communication area control, wherein in the step of position detection, the position information of an automobile is detected by the RSU; and in the step of communication area control, the communication areas of an antenna array on a lane is switched over by the RSU according to the detected position information of the automobile and referring to a corresponding relationship between preset automobile position information and the communication areas of the antenna array on the lane; wherein at least two communication areas are provided; different communication areas have different distances with the antenna array; the corresponding relationship is preset in the specific mode that the closer the automobile is apart from the RSU, the smaller the distance between the communication areas and the antenna array is. With the adoption of the method, the automobile interference phenomenon during the communication between the RSU and an OBU (on-board unit) can be avoided effectively, and the reliability and the accuracy in communication between the RSU and the OBU are improved.
Owner:SHENZHEN GENVICT TECH

NFC control-based intelligent household appliance and distribution network method thereof

The invention discloses an NFC control-based intelligent household appliance, which comprises a household appliance and a mobile terminal, wherein the household appliance is provided with an NFC module and / or an electric control board; the electric control board is provided with an MCU module and a WIFI module; the MCU module exchanges data with the NFC module and the WIFI module respectively; the mobile terminal is loaded with an APP for being connected with a cloud-end database, downloading networking resources and communicating with the NFC module for exchanging distribution network data; and the NFC module is a medium for wireless communication between the mobile terminal and the MCU module. Quick distribution network is realized through the mobile terminal, the NFC module and the electric control board; the NFC module mainly plays roles of simplifying the distribution network process and shortening the distribution network time during the whole system; the structure is simple and reasonable; the operation is simple and quick; and the distribution network success rate is high.
Owner:GUANGDONG GALANZ GRP CO LTD

Time division multiple access/frequency division multiple access (TDMA/FDMA)-based wireless sensor network (WSN) medium access control (mac) layer scheduling method

InactiveCN102264146AEliminate data sending conflictsNo communication interferenceEnergy efficient ICTNetwork topologiesWireless mesh networkCode division multiple access
The invention discloses a time division multiple access / frequency division multiple access (TDMA / FDMA)-based wireless sensor network (WSN) medium access control (mac) layer scheduling method. By the scheduling method, channels are distributed by using a time division multiplex (TDM) system in clusters and a frequency division multiplex (FDM) system among the clusters aiming at a clustering-based data collection type WSN network. The TDM system and the FDM system favorably overcome the defect of a large number of access conflicts of a contention type mac scheduling method under the condition of high network load. Meanwhile, by the novel mac scheduling method, carrier sense multiple access (csma) time slots are introduced at a communication stage in the clusters, so that the defect of low expansibility of the TDMA scheduling methods is overcome. A node revives in an active period to forward data and enters a dormancy state in an inactive period, so that the energy consumption is lowered. According to the conditions of the network load, by the scheduling method, the duty ratio of the active period in the communication cycle can be automatically adjusted, the dynamic requirements of the network on throughput can be met, and the time delay of the data is reduced to a certain extent.
Owner:ZHEJIANG UNIV
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