Content-Based Publish–Subscribe in a Mobile Environment
Gianpaolo Cugola, Amy Lynn Murphy, Gian Pietro Picco · Auerbach Publications eBooks · 2016
Modern distributed computing demands not only scalability, as witnessed by the Internet, but also an unprecedented degree of adaptability to dynamic conditions. Mobile computing is evidence of this trend. The mobility of network nodes undermines many of the traditional assumptions of distributed systems: The topology becomes fluid as hosts move and yet retain the ability to communicate wirelessly; communication occurs over a shared medium that is not only unreliable but also largely unpredictable, as it strongly depends on the characteristics of the local environment; and hosts and therefore applications frequently experience disconnection, which is no longer just a network accident but is often induced deliberately for long periods of time to save power. Other modern distributed scenarios raise similar issues in terms of dynamicity; peer-topeer networks and sensor networks come to mind.