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Delay Tolerant Networking Research Group

The Delay-Tolerant Networking Research Group (DTNRG) is concerned with how to address the architectural and protocol design principles arising from the need to provide interoperable communications with and among extreme and performance-challenged environments where continuous end-to-end connectivity cannot be assumed. Examples of such environments include spacecraft, military/tactical, some forms of disaster response, underwater, and some forms of ad-hoc sensor/actuator networks.

Tetherless Computing

The Tetherless Computing Architecture (TCA) is intended to enable opportunistic communication for occasionally connected computers and addresses problems such as mobility transparency, disconnection resilience, identity management, access sensing and low control overhead. TCA is an extension of the Delay-Tolerant Networking Architecture that especially considers terminal mobility in delay tolerant networks.


Haggle is a new autonomic networking architecture designed to enable communication in the presence of intermittent network connectivity, which exploits autonomic opportunistic communications (i.e., in the absence of end-to-end communication infrastructures).

MIT Roofnet

Roofnet is a experimental 802.11b/g mesh network in development at MIT CSAIL which provides broadband Internet access to users throughout Cambridge.


FleetNet aims at the development and demonstration of a wireless ad hoc network for inter-vehicle communications. Key design requirements for FleetNet are the capability to distribute locally relevant data where generated and needed and to satisfy the vehicle drivers' and passengers' needs for location-dependent information and services. Location awareness and position data play a crucial role not only for FleetNet applications but also for the communication protocols deployed.


The European research project OverDRiVE (Spectrum Efficient Uni- and Multicast Over Dynamic Radio Networks in Vehicular Environments) aims at UMTS enhancements and coordination of existing radio networks into a hybrid network to ensure spectrum efficient provision of mobile multimedia services. An IPv6 based architecture enables interworking of cellular and broadcast networks in a common frequency range with dynamic spectrum allocation (DSA).


The Hocman prototype is an application for handheld devices equipped with wireless ad hoc networking interfaces. It uses a peer-to-peer architecture to accomplish sharing of HTML documents with peers in the immediate proximity. The aim of sharing is to spark social interaction among motorcyclists during brief encounters

The following list of links to WLAN hot-spot operators already providing access at gas stations, rest areas and other public places that can be accessed from the road. provides high-speed WIFI wireless Internet access in locations dedicated to the transportation industry such as truck stops, travel plazas, repair shops and terminals across America.

Airnyx Hot-Spots at German Gas Stations

Airnyx operates several hundres WLAN hot-spots at German gas stations (Agip and bft).

T-Mobile WLAN Hot-Spots at Texaco Gas Stations

T-Mobile UK has installed WLAN hot-spots at 100 Texaco service stations in the UK. (local copy)

Telenor WLAN Hot-Spots at Statoil Gas Stations

Telenor has announced to install WLAN hot-spots at 300 Statoil gas stations in Norway. (local copy) (local copy)

Telabria RuralMesh

Telabria RuralMesh is a WLAN community broadband solution for rural and remote areas where either telephone exchanges have not been enabled for broadband, or which are too far from an enabled exchange to receive wireline ADSL service.