Real-time communications services will be one of the most promising applications on the Internet. Real-time traffic usually utilizes a significant amount of resources while traversing through the network. To provide guaranteed service for delay-sensitive real-time applications, both resource reservation and effective traffic control are necessary. The resource reservation protocol (RSVP) was de...

–Based on end-to-end delay measurements of IP probe-packets over a Þxed path obtained from RIPE NCC, we model the stochastic part of the delay and propose statistical methods to analyse the data. The Internet traffic on the Þxed path interferes with the IP probe-packets. This is modeled as an alternating on/off renewal process. On top of the delay caused by Internet traffic, the IP probe-packet...

Peer-to-peer (P2P) live streaming provides a scalable solution to the distribution of multimedia content. However, existing streaming applications are plagued by the problem of long playback latency, which discourages commercial IPTV deployment from the ISP end. Moreover, ISP may provide viewers with diverse service options with different video quality, such as 720HD and 1080HD. Obtaining assur...

An end-to-end round trip time (RTT) is one of the most important communication characteristics for Internet applications. In order to meet the quality of service (QoS) for applications such as streaming services, it is important to understand and predict the delay characteristic accurately. Because characteristics of the packet transmission delay in the Internet vary strongly related to the tim...

Delay Tolerant Networks (DTNs) operate in a environment characterized by intermittently connected links and long, variable latency. End-to-end reliability schemes, such as TCP, perform poorly, or not at all, in this environment. Source node storage becomes a constrained resource when intermittent links have long downtimes or latency to receive acknowledgement from the destination is long. To al...

Mobile ad hoc networks range from traditional MANETs where end-to-end paths exist from sources to destinations, to DTNs where no contemporaneous end-to-end paths exist and communication is achieved by the store, carry, and forward model of routing. Hence, nodes of these networks need to identify the level of connectivity of the network they belong to and classify it as a MANET or a DTN, in orde...

Delay-Tolerant Networks (DTNs) have the potential to interconnect devices in regions that current networking technology cannot reach. The idea is that an end-to-end connection may never be present. To make communication possible, intermediate nodes take custody of the data being transferred and forward it as the opportunity arises. Both links and nodes may be inherently unreliable and disconnec...