Institute of Electrical & Electronic Engineers
In the last few decades, the dominant trend in digital communication research and practice has focused on devising fast communication systems, where the delay and/or speed of communication has been critical performance measures. This has been mainly in response to an ever-increasing demand for high data rate communication networks by the users of such systems. However, in the last few years the notion of delay tolerant communication networks and their potential applications have also become the subject of intensive research. The authors can envisage many applications in which neither the sender(s) nor the receivers are sensitive to delay in the exchange of data.