In delay tolerant networks (DTNs) with uncertainty in node mobility, message forwarding usually employs a multi-copy, opportunistic forwarding scheme to improve delivery probability. Minimizing the delivery latency (delay) and minimizing the number of forwardings (message copies) have been two conflicting goals. On the other hand, utility-based routing has been proposed in multi-hop wireless ne...

In this paper, we propose DIME (DIffServ MAC Extension), an extension of the IEEE 802.11 MAC protocol to support Differentiated Services. The proposed extension consists of two optional modules: the Expedited Forwarding (EF) and the Assured Forwarding (AF). The Expedited Forwarding extension (DIMEEF) reuses the Interframe space of the Point Coordination Function (PCF) of the IEEE 802.11 standar...

Ethernet forwarding loops are dangerous. Packets can be trapped in a loop and cause network congestion and instability. Furthermore, packet forwarding can be disrupted due to the pollution of forwarding tables. In this report, we show that the “count-to-infinity” behavior in Ethernet’s Rapid Spanning Tree Protocol (RSTP) can lead to a temporary forwarding loop. Additionally, we identify the cau...

This paper presents a new set of forwarding behaviors that fits rate-adaptive and delay-sensitive applications with limited loss tolerance. We consider an application to have limited loss tolerance if it needs loss-free forwarding of specific packets up to a certain rate. The new set of forwarding behaviors are attractive for developing real-time applications for the Internet. In particular, su...

Recent vehicular routing proposals use real-time road traffic density estimates to dynamically select forwarding paths. Estimating the traffic density in vehicular ad hoc networks requires the transmission of additional dedicated messages increasing the communications load. These proposals are generally based on unicast sender-based forwarding schemes. The greedy nature of sender-based forwardi...

Vehicular ad hoc networks which support active safety applications have to address data packet recipients by taking the position of the vehicles into account. This leads to a two step forwarding procedure. Firstly, in line forwarding mode data packets are sent to a target area and in a second step the data packets are distributed inside the target area (area forwarding mode). This contribution ...

Multicast data distribution is achieved through three mechanisms: rendezvous of senders with receivers, distribution tree building protocols, and multicast data forwarding. While the first two mechanisms have been extensively studied, scaling multicast forwarding state has not been addressed. The lack of efficient strategies for multicast forwarding state aggregation could seriously inhibit the...