Mobile embedded systems increasingly use transactions for applications like mobile commerce, banking or commercial applications. A transaction in mobile distributed environment may involve multiple mobile devices, beside fixed ones, as full participants. In this paper we propose a distributed transaction processing model in mobile environment which considers two communication scenarios, i.e. one when mobile hosts can connect to the fixed network and the second when they cannot. We present a decision algorithm, responsible for making a decision for a mobile host when it is disconnected from the fixed network for a certain period of time.