11 results about "Application layer" patented technology

The invention relates to a block access-based flash reading and writing method. The method comprises the following steps of: 1, scanning physical blocks of the flash to acquire corresponding page status tables of the physical blocks; 2, acquiring a partition physical block numbering table; 3, acquiring a partition capacity table of partitions according to the number of partition physical blocks and the number of corresponding effective pages; 4, determining the serial number of the partition accessed by an application layer and the offset in the partition according to the partition capacity table; 5, acquiring the virtual block number and virtual page number of the partition through the offset according to the number of effective pages of the physical blocks in the partition; and 6, acquiring the serial numbers of the physical blocks according to the virtual block number along with the partition physical block numbering table, and acquiring the physical page numbers of the effective pages according to the virtual page number along with the page status table of the physical block. By mapping the physical layers with ineffective pages into a continuous linear storage medium, the effective capacity of the storage medium is maximally extended.

The invention relates to an Internet of Things platform architecture based on a rule engine, which comprises an application layer, a system service layer, a network layer and an equipment layer whichare sequentially arranged from top to bottom and are in communication connection the system service layer comprises a rule engine module, a database rule event table and an API (Application Program Interface) for processing logic services; and the application layer comprises a monitoring platform control end, and the monitoring platform control end comprises a rule event setting module associatedwith the database rule data table. Compared with the prior art, high separation of the service logic rule and the system is realized through a rule engine technology; a special service logic interfaceis provided; the service personnel can conveniently customize the logic rules, meanwhile, the rule engine technology specifies a set of perfect rule design grammars, a user can abstract the corresponding logic rules from complex service system rules, and the platform system has high flexibility during maintenance and development through the rule engine technology.

The embodiment of the invention discloses a data packet forwarding system and method. The system comprises exchanger hardware and a CPU (Central Processing Unit) platform. The exchanger hardware is connected with the CPU platform and used for receiving a data packet, judging whether the exchanger hardware is stored with an exchange rule matched with the data packet; if so, the data packet is forwarded according to the exchange rule; otherwise, the data packet is sent to the CPU platform. The CPU platform is used for extracting the application layer information from the data packet, carrying out characteristic matching on the application layer information and an internally configured application layer characteristic, and if the characteristic matching is finished, configuring an exchange rule corresponding to the data packet according to a data packet processing strategy corresponding to the application layer characteristic, writing the exchange rule into the exchanger hardware and transmitting the data packet to the exchanger hardware. By adopting the system provided by the embodiment of the invention, the seven-layer exchange can be realized at quite low cost and with quite high exchange performance.

The invention provides a Web version mobile phone desktop system based on a micro-service application architecture and a user workbench, relates to the technical field of telecommunication, on the basis of adopting a micro-service architecture, based on a B/S architecture, the assembly of a Web version mobile phone desktop user workbench is realized. The technical architecture comprises an application layer, a service layer and a data layer, the data layer comprises basic data, system management data and user personalized data, the service layer provides service for the application layer and specifically comprises a control layer, a logic layer and a persistence layer, and the application layer comprises a user workbench, system background management and unified authority management; the user workbench comprises desktop style switching, wallpaper switching, desktop layout, window gadgets, desktop notes, function addition, homepage display and screen top display setting. Specific business scattering and recombination on the basis of single sign-on are realized, various desktop layout style selections are supported, a user is supported to customize concerned core businesses, and useroperation steps are reduced.

The invention discloses an industrial data monitoring system based on an embedded modularization platform. The industrial data monitoring system comprises a man-machine interaction module for displaying and inputting signals through keys, a power panel module for supplying electricity, and a relay switch module for outputting the signals. The man-machine interaction module comprises a hardware driving module, an operating system module and a page operation module which are sequentially connected. Through design of the embedded universal platform, when new hardware is added, what is needed is that the interface of the page operation module is modified aiming at products, the fact that uniform code foundation frames can be used in an industrial instrument platform is realized, top layer codes of an applied part need to be modified in research and development of different products, the same format is adopted in interfaces, the interfaces do not influence one another, regardless of the fact that one interface or multiple interfaces operate in the system, no influences are caused on stability of the system itself and the foundation frame except applied layers, and an inner core always needs no modification to avoid the problem that all parts need to be redesigned when new products are developed in the past.

The invention discloses a direct-current charger model suitable for a hardware-in-the-loop simulation system. The model comprises a CAN message receiving layer, an application layer and a CAN messagesending layer; the CAN message receiving layer is connected with the application layer and the CAN message sending layer; and the application layer is connected with the CAN message sending layer. With the direct-current charger model suitable for the hardware-in-the-loop simulation system of the invention adopted, the normal communication of the direct-current charging CAN of a BMS (battery management system) can be tested, the fault of a whole communication process can be simulated, and whether the BMS can judge a fault and performs appropriate fault processing in the event of a fault can betested.

The invention provides a universal digital modeling method for a hardware device. Various attributes of the hardware device are abstracted and generalized to form a universal model; and the method is used for modeling different types of devices in the same way. The method is equivalent to middleware of the hardware device; and after use of the method, business application layer software no longer needs to directly communicate with multifarious hardware devices, so that the unity of interaction between the business application software and the multifarious hardware devices is realized. After application of the method, the development difficulty and workload of internet-of-things applications are lowered and a clear labor division interface is provided for an internet-of-things industry chain. Hardware manufacturers and application software developers work independently, so that invalid development work in the industry can be reduced, definite labor division can be realized for the industry chain, and the development of the internet-of-things industry can be effectively facilitated.

The invention provides an adaptive rate selecting algorithm based on vehicle safety communication. When a fuzzy decision is utilized to perform selection of message transmission rate according to fading packet loss and interference packet loss, a large number of fuzzy rules and parameter sets are required to be designed, and the work is very complicated and even cannot be finished for a designer.All parameters are initialized, PLRAVG, PLRINT and PLRFAD are assigned to 0, an optimal rate is set as a base rate (3Mbps); each node adopts Sym2PLR to perform estimation of average packet loss PLRAVGin local according to a channel symmetry principle; Dis2PLR is adopted to perform the estimation of fading packet loss PLRFAD according to a relative distance of each node calculated by an application layer; influence PLRINT caused by interference on packet loss is obtained according to the first two steps; a fuzzy decision FuzzyRateSelection is adopted, an optional rate BestBitRate under the current environment is obtained according to the PLRFAD and the PLRINT and is returned. The design complexity of a fuzzy system is simplified.