The research of subscription method of the TransactionEvent data for EPCIS based on Web Service

As the transaction has the features of atomicity, consistency, isolation, and durability, the process of the TransactionEvent in the Internet of Things is complex. All operations of a TransactionEvent are either all completed or completed none, and the transaction data is hard to deal with. To solve this problem, the article specifies the start time and end time of the transaction, and to send a subscription request to the ALE layer. ALE layer will return the needed information of the product generated within the time back to the EPCIS layer. To prevent that the data is too large, ALE layer divides the data into small pieces, and transmits them in asynchronous form. After that, the EPCIS layer needs to integrate these data pieces to generate TransactionEvent data reports. Meanwhile, in order to achieve the flexible combination of different services in the Internet of Things, and make the business independent of programming language, implementation and operating platform, the article will release the transaction data report generated in the EPCIS layer as a service to achieve a loose coupling among different business.