Advances in computer networks, telecommunications, and portable mobile devices have increased the demand for applications and services that are suitable for environments with intermittent connectivity and mobility of devices. A central question for the viability of such applications on environments like these are the possible solutions for Mobility Management, i.e., the automatic maintenance of the connectivity between system components in scenarios where the devices change their IP addresses dynamically as they reconnect to different network domains. Starting from an initial investigation of the main solutions for Mobility Management, this dissertation presents the development of a solution on the application layer based on the SIP protocol. Then, it presents the adaptation of an existing publish/subscribe system to make it use the developed Mobility Management solution, in order to provide support for the mobility and disconnection of event producers and consumers, and also NAT and firewall traversal, enabling the system to be used on the Internet, and not only on local networks. The publish/subscribe model has been chosen as a case study for the implemented solution, because it provides asynchronous and anonymous interactions that are very well suited to the requirements of a mobility scenario. The adaptation of the publish/subscribe system started from an investigation of the main requirements a system like this should meet in order to support mobility and disconnection of devices. The referred system has been tested for different scenarios, and its performance has been evaluated for different configurations, and it has been compared to the conventional publish/subscribe system.