Improved connectivity for passengers on commuter trains. Börje Ohlman Anders Eriksson Karl-Åke Persson Ericsson

Transcription

1 Improved connectivity for passengers on commuter trains Börje Ohlman Anders Eriksson Karl-Åke Persson Ericsson

2 Content ICN background, short introduction Improved connectivity for passengers on commuter trains problem description Project proposal outline

3 Evolution of networking Today s Internet Focuses on Conversations between osts ost-centric abstraction Who to communicate with Information-centric network Focuses on Dissemination of Information objects Information-centric abstraction What to communicate Connect nodes Web Evolution CD N P2P Access information 09/23/11 3

4 ost-centric networking Connect to Server X and get object B Trusted Server Server X Secure Connection 09/23/11 4

5 Information-centric networking Untrusted host Trustable copy of object B Get object B Untrusted connection 09/23/11 5

6 Key elements in ICN Object Naming Object Caching ow to find Objects

7 Object naming ow to make objects trustable? Object name = type/ hash of object content An object containing nothing (empty string) will get the name Sha-256/e3b0c44298fc1c149afbf4c8996fb92427a e41e4649b934ca495991b7852b855

8 Caching Storage capacity in nodes will continue to increase. New Seagate technology promises hard drive storage capacities of up to 60 terabytes in the next decade Assumption: In the not to far future nodes should be able to store most of the content that they are forwarding or downloading. This will decrease network traffic. A copy of the content you are looking for is probably available close to you in a cache.

9 ow to find Objects NRS Broadcast Add hook routing Name based routing Name resolution servers ierarchical Distributed ash table

10 Network characteristics Node-centric network Information-centric network

11 ICN vs current networks P2P P2P P2P P2P Overlay Network P2P P2P API DNN API DNN DNN DNN Dissemination DNN Network DNN API P2P P2P P2P P2P API API DNN DNN Caches integrated in the network infrastructure Combines today's CDNs and user caching (p2p) in the basic network service Network service in terms of named data objects No direct host addressing

12 Object Lock-in per Application sensor sensor application application content contentcentric distribution application application person-toperson person-toperson application application sensor sensor sensor person person content person person content = object naming naming reachability reachability naming naming reachability reachability naming naming reachability DNS global IP network Today s Internet Object lock-in per application Comparable to host lock-in per network before Internet 09/23/11 12

13 Application Development on a Common Naming and Reachability Infrastructure App X App Y NRS & RVS sensor person content person naming reachability caching global IP network person any type = object NetInf API Information centric network Seamless communication between objects of all types NRS Name Resolution System RVS Rendezvous System 09/23/11 13

14 Improved connectivity for passengers on commuter trains problem description (1) Today mobile networks have difficulties to provide adequate service in some challenging situations, e.g. when a commuter train with large numbers of active users are moving relative the network infrastructure.

15 Improved connectivity for passengers on commuter trains problem description (2) Implement solutions for this problem using ICN technology p2p communication and caching Local cache with WiFi access Real world trial NetInf cache.. IO 3G NetInf cache IO WLAN

16 Project proposal outline Develop an NetInf node in Erlang with WLAN and caching Deploy SAIL NetInf Androids together with WLAN caching node in a train environment Perform extensive testing and evaluation of how connectivity is changed using this technology Develop new NetInf functionality, e.g. caching strategies, multihop vs. infrastructure communication,. The train scenario is an example. Alternative NetInf scenarios can be considered.

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18 Improved connectivity for passengers on commuter trains problem description (2) We would like to investigate in some type of real-world trial how ICN, by p2p communication and caching could improve the situation by offloading traffic from the mobile infrastructure. Local cache with WiFi access in train can be managed by: train operator interested in improving the travel experience cellular operator offloading the cellular network by offering a cellular access via the cache if none of the above is at hand, caching can be distributed on the mobile end user devices on the train NetInf cache IO WLAN NetInf cache IO 3G

19 Improved connectivity for passengers on commuter trains problem description Today mobile networks have difficulties to provide adequate service in some challenging situations, e.g. when a commuter train with large numbers of active users are moving relative the network infrastructure. We would like to investigate in some type of real-world trial how ICN, by p2p communication and caching could improve the situation by offloading traffic from the mobile infrastructure. Local cache with WiFi access in train can be managed by: train operator interested in improving the travel experience cellular operator offloading the cellular network by offering a cellular access via the cache if none of the above is at hand, caching can be distributed on the mobile end user devices on the train

20 Improved connectivity for passengers on commuter trains NetInf cache IO 3G Local cached copies are found and used WLAN NetInf cache IO

21 4WARD NetInf Naming Scheme Information Object (IO) = (ID, Data, Metadata) ID = (Type tag, Authenticator, Label) Each IO has an owner All equivalent copies have the same ID ID Type A=ash(PK IO ) L={attributes} Security Data Metadata SK IO Slide 21

22 Identifier and Information Modelling 1. Step: Persistently identify information via identifier/locator split Location-independent identifiers Represent multiple copies 2. Step: Representation of information via Information Objects (IOs) Another level of indirection Represent information independent of specific copy and encoding E.g. a text, a song Contains information-specific metadata E.g. access rights, attributes Aggregation All About Information Objects can do more: Representation of: Streams Services Real-world objects (e.g., a book, person) IOs can be used to organize information Data IO Files IOs Encoding IO Song1.mp3 Song1.mp3 Song1.mp3 Song1 Song1 Song1.wav Song1.wav Song1.wav Virtual Entity IO Lyrics.txt Lyrics.txt Lyrics.txt Lyrics.txt Eiffel Eiffel.jpg Eiffel.jpg Eiffel.jpg Paris Service IO Service1 Service1 Service1 Enables efficient information dissemination System can automatically choose encoding and copy (e.g. based on metadata) User can navigate information (e.g. choose encoding) 13/09/2012 Slide 22

23 ICN is more than CDN Augmented Internet Real-world objects Linking real world objects in the virtual information world Clicking on and bookmarking real world objects Semantic information model Support for DTN The ICN pub/sub API naturally support asynchronous communication Sensor networking ICN handle sensor data just like any other type of information object Eiffel Tower istorical Info Wikipedia Buy Ticket 09/23/11 23