Research On Transaction Event Subscription Method And Technology Of EPCIS

With the advent of the information society, the Internet of Things has been gradually developed and widely used. Using the technology, such as RFID(Radio Frequency Identification), wireless data communication, and so on, the Internet of Things constructs a network which can cover everything in the world based on the Internet. It can realize the automatic identification and information sharing, so that the goods can communicate with each other without the human intervention. It provides a effective and practical solution for the inventory system and supply chain.To achieve the regulating development of the Internet of Things, the EPC global has proposed the corresponding standards, including RM specification, ALE specification, EPCIS specification, ONS specification. The EPCIS specification defines five event types of the Internet of Things, to meet the needs of enterprise business activities. The enterprises can add, change and delete the event type according to their own business needs. The five types of event are, EPCIS event, object event, aggregation event, quantity event and transaction event.As the transaction has the features of atomicity, consistency, isolation, and durability, the transaction event in the Internet of Things is complex to deal with. For example, because the sale time of the product does not confirm, the processing cycle of the transaction event is uncertain; since transaction projects are often large, the transaction data will be big and dirty; the transaction event is real-time. All the operations of a transaction event are either all completed or not completed all, so the generated transaction data is not easy to deal with. In order to solve the above problems, this paper using the non-integrated control method proposed by the ALE layer, sends the subscription request to the ALE layer, in the premise of the regulated start time and end time of the transaction event. The ALE layer will send back the needed information of the product during this time to the EPCIS layer. To prevent excessive data, the ALE layer cuts the data into pieces and uses the asynchronous method to transmit. Therefore, the EPCIS layer needs to integrate these data fragments, and generate the data report of the transaction event. Meanwhile, in order to achieve the flexible combination of different business in the Internet of Things, and make the business independent of the programming language, implementation and operation platform, this paper will publish the data report generated by the EPCIS layer as a service, achieving the loose coupling of different business. Using the designed and implemented prototype system of the Internet of Things, this paper verifies the efficiency and reliability of the method, and has important significance to the promotion of the Internet of Things.