Identifying scenarios that are both feasible and can derive benefit from DTN.
The results will hopefully help derive recommendations for how aspects of DTN protocols (and space standards such as those from the CCSDS DTN WG) might influence the adoption of DTN features in both GEO/LEO and in the core of the future Internet.
Utilising existing Satellite modem technology, we will develop a system that communicates using DTN2 implementation of the bundle protocol in a Machine 2 Machine scenario identified in the study.
The scenarios identified are as below. We will be focusing on 3 and 4 initially.
- Uni Directional
Uni-directional satellite broadcast channel coupled with low-bandwidth, limited range bi-directional VHF channels. The question here for DTN is can it be used in combination with VHF for ship to shore communications while using satellite for unidirectional communication.
- Bi Directional Log cabin Scenario: Satellite connection outside or near footprint. This scenario will ask the question of how far north can satellite coverage reach using DTN.
- BiDir - Where Log Cabin and Marine Monitor scenarios using bi-directional satellite link that is liable to be disrupted. Buoys will often be placed in locations that do not have good (or any) coverage via terrestrial networking.
- Cabin – People living off-grid in static location for limited periods of time with limited access to terrestrial networks. The question for this scenario is how much better would it be for them if some nodes had satellite access and how much might that costs as opposed to using DTN Data mules or long distance 3G.
The study is small-scale (12 months duration, approx. 9MM) with three tasks. Task one is documenting different scenarios for discussion with ESA, followed in Task 2 by more detailed review of selected scenarios and production of outline designs for selected scenarios and for any required DTN adaptations or extensions needed. Task 3 is to prototype solutions that can be demonstrated based on one of the selected scenarios.
We completed and submitted TN-2 (DTN Adaptations for M2M-Satellite Communications) and TN-3 (Demonstration of DTN Applications in M2M Satellite Communications) notes. Final Review including demonstrations was held in April 2014.