The Research And Technology Method Of Transaction Events In ALE

In accordance with the RFID IoT technology reference standard given by the International Organization for Standardization of EPCGlobal, RFID networking provides a set of network services, including Reader Management(RM), EPC Information Service(EPCIS),Application Layer Event(ALE) and Object Naming Service(ONS).ALE layer located between the EPC event detection layer(RFID tag reading level) and commercial application logic layer(EPCIS layer).ALE is the nerve center of IoT technology, and is the intermediary between sensing layer and applications.In the EPCGlobal ALE specification, it defines a number of interface functions, but it did’t illustrate a specific implementation. The main purpose is to provide a full-featured alternative middleware model. Middleware platform will has good resistance, scalability, convergence and versatility if it compliant the specification. ALE in the EPCGlobal network architecture major tasks are:1.Provides a set of communicate services with hardware devices, shields the difference between different hardware, and captures EPC tags from various devices;2.Provides data processing and managing services, integrate and filter data that repeating and not interested, reduce the amount of data and re-group counts;3.Provide communication service with application. According to the needs of enterprise, package the processed data into different formats and send reposts to enterprise applications. EPCIS defines five types of events to meet the business needs of enterprise. These five event types are:EPCISEvent, Objectevent, AggregationEvent, QuantityEvent, Transaction Event. So, ALE must provide interface and service for the events, this paper mainly studies on the Transaction Event in ALE layer. Transaction Event describes the association or disassociation of physical objects to one or more business transactions. Due to the nature of the transaction, it result three aspects:1.Because we can’t confirm the time of the sale, the transaction processing cycle of Transaction Event is uncertainly, often very long.2.Transaction Projects are often large, resulting in a large transaction data and dirty.3. Transaction Event demand real-time process. Traditional centralized processing method exists insufficient in efficiency, reliability and real-time aspects.To solve these problems, this paper summary a new approach:non-centralized control, give a solution and the main algorithm, and test practical application of the above solution combining with a commercial enterprise of IoT.