173 results about "MQTT" patented technology

The invention discloses an inference task collaborative scheduling system and method oriented to multiple terminals of a swan gap. The inference task collaborative scheduling system comprises a communication module Broker, a system monitoring module SystemProfilter, a scheduling module Scheduler and an inference task execution module Worker. According to the method, a structured resource state vector is constructed based on an NDK native interface so as to comprehensively represent the real-time availability of equipment; a lightweight MQTT protocol is adopted to support low-overhead and high-robustness cross-terminal state synchronization and task distribution; a comprehensive load scoring mechanism fusing task priorities and dynamic weights is designed, a multi-objective optimization problem based on a non-dominated sorting genetic algorithm (NSGA-II) is introduced, task delay is minimized in a combined mode, terminal loads are balanced, and energy consumption is controlled; meanwhile, the execution time delay is efficiently estimated in combination with a proxy model based on linear regression, and the scheduling overhead caused by real reasoning and calling is avoided; the whole architecture is deeply adaptive to a swan-mong system, and is compatible with an Android platform through modular packaging and unified communication interface design, and efficient, self-adaptive and cross-platform collaborative scheduling oriented to a swan-mong multi-terminal reasoning task is realized for the first time.

The invention provides an edge gateway computing power sharing method based on an MQTT protocol. An edge terminal sends a computing power request to an edge gateway through the MQTT protocol, wherein the computing power request comprises a computing task type identifier and a priority identifier; after receiving the computing power request, the edge gateway dynamically schedules heterogeneous computing resources of a built-in neural network processing unit (NPU) and a built-in central processing unit (CPU) according to a computing task type identifier and a priority identifier; and the edge gateway executes a corresponding calculation task by using the scheduled calculation resource, feeds back a processing result to the edge terminal initiating the request through an MQTT protocol, and synchronizes own calculation power state information.

The embodiment of the invention provides an Internet of Things control system and method, electronic equipment, a storage medium and a program product, and relates to the technical field of industrial Internet of Things. The system comprises a connection management module used for establishing and maintaining connections between a plurality of Internet of Things devices and a plurality of MQTT servers corresponding to the Internet of Things devices; the dynamic equipment mapping module is used for mapping the data of the Internet of Things equipment to the MQTT server through the configuration file; and the message queue and network disconnection continuous transmission module is used for putting the message into the tail of the message queue to continuously transmit the message if the MQTT client instance corresponding to the Internet of Things equipment is detected to be in a network disconnection state when the message is published to the MQTT server. According to the scheme, dynamic expansion of heterogeneous equipment in the industrial Internet of Things, parallel butt joint of multiple cloud platforms, network disconnection continuous transmission and two-way communication capability are realized.

The invention provides an event processing method, system and equipment based on Internet of Things equipment and a medium, and belongs to the technical field of Internet of Things. The method comprises the following steps: receiving an Internet of Things equipment message through an MQTT Broker, identifying an event type according to a theme, and distributing the event type to a corresponding thread pool; concurrently analyzing the JSON load in each thread pool, and converting the JSON load into a structured data object; caching the data in a batch processing queue in a classified manner, and triggering batch processing based on a queue state; extracting batch data, generating an optimized SQL statement, executing writing, and processing exceptions; screening data based on a routing rule and asynchronously forwarding the data to message middleware; meanwhile, processing parameters are dynamically adjusted according to the equipment state data and the system load. According to the invention, efficient processing of Internet of Things equipment events is realized, and the system throughput, the resource utilization rate and the data processing real-time performance are improved.

The invention relates to the technical field of information security, in particular to a fire-fighting Internet of Things equipment authentication method supporting an anti-quantum algorithm, comprising the following steps: before fire-fighting Internet of Things equipment and an Internet of Things platform server are started through Internet of Things MQTT communication connection, the fire-fighting Internet of Things equipment initiates a first TLS handshake packet to the Internet of Things platform server, the fire-fighting internet-of-things equipment receives a server digital certificate returned by the internet-of-things platform server, verifies the validity of the server digital certificate, and sends an equipment certificate to the internet-of-things platform server after the verification is passed, so that the internet-of-things platform server generates a random session key ciphertext by using a public key in the equipment certificate, and sends the random session key ciphertext to the fire-fighting internet-of-things equipment; the fire-fighting internet-of-things equipment unpacks the random session key ciphertext by using a private key to obtain a shared session key K; and the fire-fighting Internet of Things equipment establishes a security encryption communication channel with the Internet of Things platform server based on the shared session key K, and executes MQTT message transmission in the communication channel.

The invention relates to the technical field of data transmission, and discloses an exception identification method and system in MQTT data transmission, and the method comprises the steps: receiving an MQTT release message sent by a client, and carrying out the analysis to obtain a service quality level field and a theme name field; if the service quality level field is a first service quality level or a second service quality level, pushing the release option object to a release queue; the subscription client set is matched according to the subject name field, the network channel object of each subscription client is obtained, the MQTT push message is constructed through the network channel objects and sent to the corresponding subscription client, the same message event can be processed in parallel, the lock competition overhead of a traditional queue is avoided, and the service life of the message event is prolonged. According to the method and the system, the message throughput of millions per second can be supported by a single release queue, the message push delay can be controlled at the microsecond level, the performance requirement of real-time data transmission of the industrial internet is met, and the stability and availability of data transmission are further guaranteed.

The invention belongs to the technical field of communication, and particularly relates to a router system service exception self-healing method based on cloud AI, which comprises the following steps: deploying an exception detection module at a router end, collecting system logs and state data in real time and generating a standardized exception report; uploading the report to a cloud AI server through an encrypted MQTT protocol; the cloud calls a hybrid analysis model composed of a rule matching engine, a machine learning classifier and a reinforcement learning decision network to generate a self-healing strategy instruction packet; the router end receives and executes the strategy, completes service restart, configuration rollback or hotfix loading and other operations, and verifies the self-healing effect; when communication interruption exceeds a threshold value, an embedded loopback self-healing subsystem is automatically activated, and abnormity is independently handled based on a local strategy library. According to the technical scheme, millisecond-level abnormal response and high-success-rate autonomous recovery can be achieved, the network availability and the service continuity are remarkably improved, and the disaster recovery self-healing capacity is still achieved when the cloud end is disconnected.

The invention relates to the technical field of Internet of Things communication, discloses an Internet of Things multi-Android client state synchronization method, and solves the problems of poor state consistency, high back-end dependence, large delay and insufficient compatibility in the prior art. According to the scheme, the method comprises the steps that after a client completes initialization, MQTT connection with a rear end is established, an MQTT state message pushed by the rear end is monitored, after the message is received, equipment state information is obtained through analysis, local state cache and a UI interface are updated, meanwhile, the client serves as a distribution node, a UDP synchronization message containing the equipment state and the IP of the distribution node is established, and the UDP synchronization message is sent to the client. The UDP synchronization message is broadcasted to the local area network, other clients in the local area network receive the UDP synchronization message and then verify whether the distribution node IP is the client in the local area network, if the verification is passed, the message is analyzed, the state updating timestamp and the local cache timestamp are compared, and the local state cache and the UI interface are updated only when the state updating timestamp is larger.

This invention relates to a remote upgrade system and method based on ship-shore integration. The system includes modules: a shore-side management platform, a ship-side management platform, a shore-side application repository, a ship-side application repository, a client application service, an MQTT service, and an RSYNC service. The shore-side management platform pushes new version application or data package information to the ship-side management platform, and prompts the ship-side application repository to periodically pull new version application or data packages from the shore-side application repository. The client application service installs the new version application and deploys the new version data package, and provides real-time status feedback to both the shore-side and ship-side management platforms, thereby achieving remote upgrades of applications and data packages on both the shore and ship sides. This solves the problem of remote application upgrades on both the shore and ship sides, is highly practical, and allows shore-side administrators to monitor the installation and deployment status of ship-side applications and data packages in real time.

The application relates to a ZeroMQ-based distributed MQTT high-concurrency connection test method, which comprises the following steps: a control node and a plurality of Worker nodes establish a communication link through ZeroMQ, and each Worker node is instructed to create a corresponding number of Worker processes according to the number of local CPU cores; the control node broadcasts preparation instructions and subtask parameters to all Worker processes, so as to instruct each Worker process to execute a preparation process according to the corresponding subtask parameters; and the control node generates start instructions of each Worker process based on the target execution time of each Worker node, and sends the start instructions to each Worker process, so as to instruct each Worker process to execute a high-concurrency connection test in parallel. The application can truly and accurately evaluate the connection processing performance of a large-scale MQTT cluster under extreme pressure with low-cost hardware resources.

Conventional techniques have not been able to prevent unauthorized transmission of information through spoofing. [Solution] The printer 100 sends device usage information to the printer management server 200 using the HTTPS protocol and stores a certain number of these in the DB 110. The printer management server 200 saves the device usage information received using the HTTPS protocol in the DB 210. The printer management server 200 also initiates a push notification of an impersonation check job to the printer 200 using the MQTT protocol. In accordance with the impersonation check job, the printer 100 collects the information stored in the DB 110 and sends it to the printer management server 200 as a sent device usage information list. The printer management server 200 compares the received sent device usage information list with the device usage information already received in the DB 210 and determines whether the device usage information received using the HTTPS protocol is unauthorized information.

The application relates to an alliance chain and MQTT-based Internet of Things cross-domain authentication system and method, and belongs to the Internet of Things cross-domain authentication field. The application first proposes an alliance chain and MQTT-based Internet of Things cross-domain authentication method, chains and traces related devices, gateways and authentication processes of the Internet of Things, efficiently completes access management and cross-domain authentication of the Internet of Things devices through MQTT, shields the bottom heterogeneity problem, simultaneously simplifies the authentication process between trust domains by using the alliance chain node consensus, and builds a trusted cross-domain information interaction environment for the Internet of Things. Compared with the prior art, the application mainly solves the problems of different authentication modes, different certificate forms and low efficiency of different systems, provides an efficient, simple and trusted cross-domain authentication process, and simultaneously provides an Internet of Things device and gateway related data collection and storage mechanism by the alliance chain+MQTT+Internet of Things cross-domain authentication system.

The invention provides an industrial production automatic scheduling method and system. The industrial production automatic scheduling method comprises the following steps: S1, multi-source data acquisition: acquiring corresponding data from a material information table, a production order information table, a material list and a process flow table, and based on an MQTT protocol, equipment sends an operation state, predicted maintenance time and equipment productivity information to a server in real time through an MQTT client to form a database; s2, cleaning and clustering the data in the database; s3, performing scheduling calculation by using a particle swarm algorithm to obtain an optimal scheduling scheme; and S4, transmitting the optimal scheduling scheme to a result output module, and generating a detailed report. Compared with the prior art, the scheduling scheme can be comprehensively optimized, the anti-interference capability of the system is enhanced, and the production management refinement degree is improved.

The invention discloses a P2P-VPN (peer-to-peer virtual private network) networking method based on MQTT (Message Quantitative Trait Transport). The method comprises the following steps of S100, establishing unique supernode center node information of N2N; s200, if available supernode center nodes exist currently, proxy service is achieved through MQTT, the center nodes in the S100 are mapped and proxy into different supernode child nodes, and the different supernode child nodes are distinguished by specifying different topic information; if the available supernode center node does not exist at present, returning to the step S100; and S300, establishing an edge node of N2N, and enabling the edge node to be connected to the supernode child node corresponding to the edge node in the step S200. The invention discloses a P2P-VPN networking system based on MQTT, and is applied to a P2P-VPN networking method based on MQTT. According to the method, unique supernode center node information of N2N is dispersedly agented into different supernode child nodes through MQTT to be exclusively matched with each edge node, so that when any node breaks down, residual nodes in a VPN are not affected, deployment is simple, specific topic information of each node can be visually seen, and the survival state of the nodes can be conveniently judged.

The invention provides an MQTT message processing method based on combination of FIFO and priority scheduling, which optimizes the sending and response of MQTT messages in Internet of Things communication by a concentrator, ensures that a system has good stability, real-time performance and fault-tolerant capability, and improves the reliability of the system. Comprising a retransmission strategy of a synchronization request, timeout processing logic and a verification and priority processing mechanism for a received synchronization response message, and is suitable for structured communication based on MQTT among a plurality of application programs or modules. A common MQTT message FIFO combined priority scheduling scheme is a message processing mechanism considering both efficiency and fairness, not only retains the sequence and predictability of a traditional FIFO queue, but also introduces a flexible priority scheduling mechanism, so that a concentrator can dynamically adjust the message processing sequence according to different service scenes, and the message processing efficiency is improved. And the response speed, stability and resource utilization rate of the system are obviously improved.

The application discloses a network disconnection reconnection Internet of Things device firmware upgrading method based on a lightweight MQTT protocol, relates to the technical field of Internet of Things, and collects a device information set and a network information set, uses an adaptive algorithm to construct a dynamic block adjustment strategy for determining the size and download priority of firmware blocks based on the device information set and the network information set, uses a time sequence prediction model to construct an intelligent reconnection strategy for adjusting reconnection time based on the device information set and the network information set, uses the dynamic block adjustment strategy to intelligently block transmission firmware, so as to adjust the size and download order of the transmission firmware block in real time, and uses the intelligent reconnection strategy to restore connection and continue downloading when the network fluctuates, receives and checks the transmission firmware block, generates a check information set, and checks the integrity of the transmission firmware block. The continuity and success rate of firmware upgrading are significantly improved.

The invention discloses an MQTT-based Modbus network system and a data transmission method. The MQTT-based Modbus network system comprises a plurality of master devices, a plurality of slave devices, a master connector connected with the plurality of master devices through a Modbus protocol, a slave connector connected with the plurality of slave devices through the Modbus protocol, and an MQTT regulator connected with the master connector and the slave connector through the MQTT protocol. Wherein the master connector issues request information to the MQTT regulator according to requests of the plurality of master devices, and manages response information received in response to the request information. The slave connector transmits the sensing data of the plurality of slave devices or responds to one or more of the plurality of master devices through the MQTT regulator according to the update state of the sensing data of the plurality of slave devices or according to the request information of the master connector.

This invention provides a method for interconnection and monitoring of multi-warehouse logistics networks, relating to the field of multi-warehouse logistics network interconnection and monitoring technology. The method specifically includes the following steps: S1. Determining the warehouse scope; S2. Network construction within the scope; S3. Multi-scope network construction; S4. Monitoring system construction; S5. Security protection system construction; S6. System integration management. By dividing the network into forward warehouses and central warehouses, and using RS485 bus, 4G network, and VPN technology to build a stable and reliable network connection, combined with the MQTT protocol and various encryption technologies to ensure data transmission security and efficiency, and utilizing a public cloud IoT platform to achieve cross-warehouse data synchronization and unified management, supporting horizontal expansion and flexible deployment, the method also achieves functions such as batch device registration and real-time message reception through system integration management, improving the management efficiency and intelligence level of logistics warehouses, effectively solving the shortcomings of existing technologies, and enhancing the overall efficiency and monitoring effect of the logistics network.

The invention discloses an MQTT server failover method, architecture, equipment and medium, a master node and a slave node communicate through a virtual routing redundancy (VRRP) protocol, and the master node periodically sends a VRRP heartbeat message to the slave node; when a host-level fault occurs and the slave node does not receive a VRRP heartbeat message of the master node within a preset timeout interval, the slave node takes over a virtual IP address and is upgraded to a master role; when a service-level fault occurs, the detection program running on the main node detects that the specified service is abnormal, and the main node actively reduces the priority of the main node and cancels the virtual IP address bound with the main node; and when detecting that the priority of the master node is lower than that of the slave node, the slave node immediately initiates election and becomes a new master node, and binds the virtual IP address to complete fault switching. By detecting the host-level fault and the service-level fault respectively, compared with single-point deployment, when the server fails, services can be continuously provided to the outside, and the continuity of services is ensured.

The embodiment of the present application provides a kind of based on the equipment communication method and device of MQTT protocol, which is applied to MQTT subject management server, comprising the following steps: receiving the first message reported by controlled node, wherein the first message includes the equipment ID of the controlled node;Corresponding to the random subject of the equipment ID of the controlled node is generated, and the random subject is returned to the controlled node;After authenticating to the control node, the random subject is sent to the control node, so that the control node and controlled node carry out MQTT protocol communication through the random subject.In the present application, the MQTT subject of node communication is managed by MQTT subject management server, and the MQTT subject is randomized, so that malicious network node cannot listen or interfere with node communication, thereby improving the communication security between nodes of MQTT protocol network.

The invention provides a system and a method for dynamically generating identity code authority verification, and relates to the technical field of dynamic authority management. The system for dynamically generating identity code permission verification comprises a basic support module, an identity code generation module, a permission management module, a verification terminal module and a system management module. Identity code parameters are updated per minute, biological feature hash and timestamps are combined, screenshot / forgery risks are eradicated, authority strategies are pushed in real time through an MQTT protocol, strategy effective delay is smaller than 50 ms, million-level terminal concurrent verification is supported, dynamic codes are automatically generated after visitors scan codes / make appointments, passing efficiency is improved, and the authority expires and automatically fails without manual intervention. The system supports SM4 encryption of national cipher, GDPR data desensitization and automatic archiving of audit logs, meets financial-level security requirements, reduces 70% of cloud load by edge computing, is compatible with protocols such as TCP / I P / RS485 and the like by hardware, and reduces deployment cost.

The invention discloses an Internet of Things equipment simulation online test method, system and equipment and a medium. The method comprises the steps that information of equipment to be tested is collected and then imported into a database through a data information issuing platform; an equipment simulation module pulls written equipment information from a database to create an event cycle based on syncio, an independent simulator is instantiated for each piece of Internet of Things equipment, an exclusive asynchronous coroutine is created for each simulator, each simulator creates an independent MQTT client side through aiomqtt to monitor a message channel of an instruction issued by an Internet of Things platform, and the message channel is sent to the Internet of Things platform; and analyzing and processing the arrangement task, constructing equipment attributes and event data, and reporting the equipment attributes and event data to the Internet of Things platform. According to the method, a simulator is adopted to replace real equipment for testing, multi-coroutine concurrent scheduling in a single thread is realized through an asycio asynchronous programming architecture and in combination with an aiomqtt asynchronous MQTT client, the thread switching overhead of a traditional synchronous architecture is avoided, a single server can support parallel simulation of more equipment, and the method is simple and convenient to operate. And the online test requirements of massive equipment can be met while the test efficiency is improved.

The invention discloses a terminal remote management and control method, which comprises the following steps that: MQTT connection is established between terminal equipment and a cloud server, and a management end initiates a terminal equipment connection request to the cloud server and acquires address information and voucher information of a relay server by calling an HTTP (Hyper Text Transport Protocol) request; the management end requests to be connected with the relay server and obtains relay port information and management end candidate address information from the relay server; calling an HTTP (Hyper Text Transport Protocol) interface to transmit the relay port information and the candidate address information to a cloud server; the cloud server queries the information of the corresponding terminal equipment to be connected, and transmits the connection request information of the management end to the terminal equipment through an MQTT protocol; the terminal equipment starts a local OpenVPN service, collects local terminal equipment candidate address information and feeds back the local terminal equipment candidate address information to the cloud server; and the cloud server returns the received candidate address information of the terminal equipment to the management end, the management end starts an OpenVPN service, and a local area network is established to enable the management end and the terminal equipment to be in the same local area network.

The application discloses an MQTT-based device connection method and device, equipment and medium, relates to the technical field of Internet communication, and the method is applied to a device end and comprises the following steps: loading device identity configuration information; adopting a hierarchical domain name system resolution strategy to resolve access point information and acquiring a target connection address; initiating an MQTT connection request and completing authentication through an encrypted channel; if the connection fails, switching to a standby access point to repeat the resolution and connection processes; after the connection is established, directing message transmission based on a set topic format, realizing request and response interaction through a message association mechanism, and completing timeout control by using an MQTT delay message. The scheme improves the device connection speed, stability and interaction reliability, guarantees communication safety, and adapts to the multi-scene requirements of Internet of Things.

The invention discloses an MQTT voucher management method and device of an embedded Internet of Things system, equipment and a medium, and relates to the field of Internet of Things, and the method comprises the steps: reading and decrypting encrypted MQTT voucher data corresponding to a voucher obtaining request needed by MQTT connection from a local storage of the equipment; if the preset triggering condition is met, obtaining new MQTT voucher data from the target server; encrypting the new MQTT voucher data to obtain new encrypted MQTT voucher data, storing the new encrypted MQTT voucher data in a local storage, and returning the new MQTT voucher data to the requester; and when it is detected that the MQTT connection is interrupted due to the fact that the voucher has a problem, clearing the corresponding encrypted MQTT voucher data in the local storage, obtaining new MQTT voucher data, and establishing a new MQTT connection according to the new MQTT voucher data. According to the invention, the security and reliability of MQTT communication of the embedded Internet of Things equipment are improved.

This invention discloses a multi-tenant end-to-end data security isolation and control system and method, belonging to the field of vehicle network data security. It aims to solve the problems of easy data crosstalk, discontinuous isolation, unreliable trust benchmarks, and difficulty in compliance traceability in multi-tenant scenarios. The system generates a tenant root identifier (TID) for vehicle enterprise tenants, which, together with the device sub-identifier (DID), forms a tenant identifier chain. This chain is synchronized with a trusted authentication center to establish a vehicle-cloud hardware-level trust root. When the vehicle terminal accesses the system, it completes two-way identity authentication and allocates a dedicated message queue telemetry transmission MQTT topic partition and access permissions according to the TID. The terminal collects time-series vehicle control data and generates encrypted data frames with intrinsic identifiers and checksums for uploading. The access gateway performs dual isolation verification before transparent transmission. Data is forwarded to an independent logical storage partition for isolated storage according to the TID. This invention achieves strong hardware-level isolation, real-time verification, and full traceability throughout the entire end-to-cloud chain, effectively preventing cross-tenant data leakage.

The present application relates to the technical field of internet of things equipment in industrial environment, and specifically relates to a collaborative management system and method for heterogeneous high-low temperature boxes, the collaborative management system comprising an equipment layer, a collection layer, a communication layer and an application layer, wherein the data collection service unit comprises a temperature box communication module, a private protocol analysis module, an MQTT communication module and a JSON data packet analysis and encapsulation module, and the disclosed system management method comprises the following steps: a protocol analysis step; a data collection software development step; a data collection service deployment step; a message communication step; and an application layer software development step, wherein the data collection software internally completes bidirectional data conversion and externally provides a unified JSON data interface, and the disclosed collaborative management system models temperature boxes of different manufacturers and models into a standard equipment model, thereby eliminating the heterogeneity of the equipment.

The invention relates to the technical field of gateway acceleration, and discloses a gateway intelligent acceleration method and system for cloud collaboration and terminal interaction. The method comprises the steps that a gateway collects hardware fingerprints, loads a drive through an insmod instruction, allocates a fixed cache and an elastic cache, establishes MQTT long connection to send a heartbeat packet, and receives edge nodes to establish pre-connection; the cloud receives a backbone network routing table UPDATE message through a BGP protocol, and generates a path instruction containing an edge node address; and according to the path instruction, the gateway forwards the data packet scheduled by the WRED to the edge node address and forwards the data packet to a game server through the edge node. According to the method, a real-time communication channel between the gateway and the cloud is established through MQTT long connection, the high-priority game flow transmission quality is preferentially guaranteed when the network is congested, packet loss of competitive games is avoided, it is guaranteed that game data packets are always transmitted along the optimal path, game delay is effectively reduced, and the stability and reliability of an acceleration system are improved.

This invention discloses an SDWAN wide area network (WAN) networking method, comprising: determining the node devices for networking and having the node devices subscribe to a tunnel configuration topic published by a cloud server. The tunnel configuration topic is published by the cloud server based on the MQTT protocol, and each node device determined to participate in the networking subscribes to the tunnel configuration topic before the network goes online. After the node devices go online, they report to the cloud server, which then publishes the tunnel configuration information in the tunnel configuration topic, which is received by the node devices that have subscribed to the topic. A network topology is created, and the cloud server generates logical tunnel information based on the network topology and node device interfaces, and publishes it through the tunnel configuration topic. Upon receiving the logical tunnel information published by the cloud server, the node devices establish a tunnel connection. After the node devices complete the tunnel connection, they report the tunnel status to the cloud server.

The invention discloses an MQTT-based equipment connection method and device, equipment and a medium, and relates to the technical field of Internet communication, the method is applied to an equipment end, and the method comprises the following steps: loading equipment identity configuration information; analyzing the access point information by adopting a hierarchical domain name system analysis strategy to obtain a target connection address; initiating an MQTT connection request, and completing authentication through an encryption channel; if the connection fails, the standby access point is switched to repeat the analysis and connection process; after connection is established, messages are transmitted directionally based on a set theme format, request and response interaction is achieved through a message association mechanism, overtime control is completed through MQTT delay messages, and the scheme improves the equipment connection speed, stability and interaction reliability, guarantees communication safety and adapts to the multi-scene requirements of the Internet of Things.