Overview of the Aalborg University Network Coding Research and ...
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Overview of the Aalborg University Network Coding Research and ...
Analog Network Coding (signals). Inter-‐flow network coding. XOR type of coding
. COPE, CATWOMAN. Intra-‐flow network coding. RLNC type of coding. MORE.
Overview of the Aalborg University Network Coding Research and Demonstrators
Life without network coding is possible, but not desirable!
Frank Fitzek Aalborg University (CodeOn/Steinwurf)
Our moDvaDon back in 2004
Our soluDon ... Mobile Clouds
Network Coding Digital Network Coding (bits and packets) Inter-‐flow network coding
XOR type of coding
COPE, CATWOMAN
Intra-‐flow network coding
RLNC type of coding
MORE
CombinaDon of Inter-‐flow and Intra-‐flow network coding CORE
Analog Network Coding (signals)
ApplicaDon
Why are we here? • Exchange of ideas with colleagues with the interest • Show some mature demonstraDon results in different areas • Convey the piValls of network coding (we did a lot of mistakes, but we learned from them) • Cross over from research to industry, we the first steps, but need more impact
Where is network coding located? Applica9on Layer Transport Layer
Network Layer
Data Link Layer Physical Layer
h?p://www.youtube.com/watch?v=OnqGO7AWwxc
Where is network coding located? Applica9on Layer Transport Layer
Network Layer
Data Link Layer Physical Layer
Where is network coding located? Applica9on Layer Transport Layer
Network Layer
Data Link Layer Physical Layer
CATWOMAN (2011) • MulDhop network based on B.A.T.M.A.N. rouDng (draZ RFC) • ImplementaDon of network coding on real WiFi access points • MulD hop • Available via BATMAN distribuDon (just inter flow for the Dme being) Steve Song, VillageTelco
Blame the IEEE 802.11 ...
Alice and Bob Model
100%
Measurements
62%
M. Hundeboll and J. Leddet-‐Pedersen and J. Heide and M.V. Pedersen and S.A. Rein and F.H.P. Fitzek. CATWOMAN: Implementa9on and Performance Evalua9on of IEEE 802.11 based Mul9-‐Hop Networks using Network Coding. 2012. in I E E E V T S Vehicular Technology Conference. Proceedings. IEEE
Green Mobile Clouds Model
Measurements
A. Paramanathan and U. Wilken Rasmussen and M. Hundeboll and S.A. Rein and F.H.P. Fitzek and G. Ertli. Energy Consump9on Model and Measurement Results for Network Coding-‐enabled IEEE 802.11 Meshed Wireless Networks.in IEEE Interna@onal Workshop on Computer-‐Aided Modeling Analysis and Design of Communica@on Links and Networks (CAMAD). Barcelona, Spain.
Why intra flow coding? • Inter flow is powerful in some scenarios, easy to implement, no complexity, but needs control messages • Intra flow is easier to handle – RegeneraDon of distributed clouds – Meshed networks with large degree and mobility – Reduced signaling needs
• Complexity? Morten says no • Some researchers had problems to implement ... – It is not E2E anymore – Timing is important ... – Randomness
CORE = COPE + MORE • Wireless links are error prone – Traffic – Overhearing
• RLNC ensures reliability • XOR is handling the MAC
