The present disclosure provides a method performed in a server for communication in Internet of Things, including: receiving, from an application, an object definition schema including an attribute that indicates storing a latest operation message for an operation-related resource item in a client; checking if a queue exists for the operation-related resource item, upon receiving a request for an operation on the operation-related resource item from the application; and if the queue exists, storing the latest operation message in the queue in place of a previous operation message when the client is offline. The present disclosure also provides an apparatus performed in a server for communication in Internet of Things.