Ad hoc social media

Ad hoc social mediaAdrian Holzer

Currently cloud based social media

Cloud brings privacy concerns

Wearables will increase the amount of data

Cloud brings connectivity concerns

Increase in the number of NGOs

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Is there a way to replace this dark cloud?

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Ad hoc social media should be explored

But today there are almost no ad hoc social media apps

Why?

There is a lack of development support

We want to address this by providing server-less communication APIs and trustful UI guidelines

API UI

API

Today we’ll look at existing work on ad hoc infrastructure

Publish subscribe can be a good start

Anonymous messaging

Asynchronous messaging

Subscribers

C

Publisher

CC

A

B

C

CD

Match!

Basic publish / subscribe

Different publish / subscribe flavors exist with some context awareness

CP CS

Pubs are restricted to a defined Space

Publication Space

Match when:S in the Publication space

STEAM

CP CS

Content Match

Location Match

CP CS

Pubs and Subs are restricted to a defined Space

Publication Space Subscription Space

LPSS

Match when:P in Sub Space and S in Pub Space

CS

Content Match

Location Match

CP

CP CS

Context of Relevance

Context of Interest

Subscription Space

Publication Space

CPS

Match when:P in Sub Space and S in Pub Space

and both contexts overlap

CS

Content Match

Context Overlap

CP

Pub Space Match

Sub Space Match

CP DPSS CS

Sub ScopePub Scope

Dynamic Content Dynamic Filters

Match when:P in Sub Scope and S in Pub Scope Each time filter or message changes

CSCP

Content Match

Pub Space Match

Sub Space Match

[10] Yann Busnel, Nuno Cruz, Denis Gillet, Adrian Holzer, Hugo Miranda. “Reinventing Mobile Community Computing and Communication”. In the proceedings of IEEE IUCC'13. July 2013.[9] Adrian Holzer, François Vessaz, Benoît Garbinato. “ Middleware for Location Privacy: an Overview”. In the proceedings of ACM Research in Applied Computation Symposium (RACS’12). October 2012.

[8] Adrian Holzer, Lukasz Ziarek, K.R. Jayaram, Patrick Eugster, “Abstracting Context in Event-based Software”. In Transactions on Aspect-oriented Software Development (TAOSD). 9: 123-167. 2012.

[7] Patrick Eugster, Benoît Garbinato, Adrian Holzer. “Pervaho: a specialized Middleware for Mobile Context-aware Applications”. In Electronic Commerce Research Journal, 2009. Springer. [6] Adrian Holzer, Lukasz Ziarek, KR Jayaram, Patrick Eugster . “Putting Events in Context”. In the proceedings of the International Conference on Aspect-Oriented Software Development (AOSD’11). March 2011, pp.241-252.[5] Adrian Holzer, Saida Maaroufi, Samuel Pierre. “DYMES: a Dynamic Messaging Service for VANETs”. In the proceedings of the 6th IEEE International Conference on Wireless and Mobile Communications (WiMob’10). October 2010, pp.513-520. [4] Patrick Eugster, Benoît Garbinato, Adrian Holzer. “Middleware Support for Context-aware Applications”.  Chapter 14 of Middleware for Network Eccentric and Mobile Applications, 2009. pp. 305-322. Springer. [3] Patrick Eugster, Benoît Garbinato, Adrian Holzer. “Design and Implementation of the Pervaho Middleware for Mobile Context-aware Applications”. In proceedings of the 3rd IEEE International Montreal Conference on e-Technologies (MCETECH'08), 2008[2] Patrick Eugster, Benoît Garbinato, Adrian Holzer. “Pervaho: A Development and Test Platform for Mobile Ad hoc Applications”. In proceedings of the 3rd ACM Annual International Conference on Mobile and Ubiquitous Systems: Networks and Services (Mobiquitous'06), 2006.[1] Patrick Eugster, Benoît Garbinato, Adrian Holzer. “Location-based Publish/Subscribe”. In proceedings of the 4th IEEE International Symposium on Network Computing and Applications (NCA'05), 07-2005.

middleware references

How are publish / subscribe systems implemented?

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Unicast Multicast

Anycast Broadcast

They typically rely on some low level messaging protocols

Rule #1 All neighbors

hear a transmission

Devices must communicate directly Rule #2

Retransmissionsnecessary to reach further

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Existing algorithms

an analogy...

Broadcast

spread some gossip

To everyone

Only voice communication is allowed

Flooding

repeat a rumor once

C CC CCCC C

Message overload

Beware of broadcast storm

Can we do better?

Retransmit the message if no one did it before

Listen for retransmissions

Wait when a message is received before retransmitting

CBS

Wait a random time

C CC CCC

CC12 3

221 2

11- 1-

PAMPA

Wait time proportional to sender proximity

C CC C

CCC

32 2 1

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21 1

![9] Adrian Holzer, Patrick Eugster, Benoît Garbinato. “Evaluating Implemetation Strategies for Location-based Multicast Addressing”. In IEEE Transactions on Mobile Computing (TMC). 12(5), 2013.[8] Adrian Holzer, Patrick Eugster, Benoît Garbinato, “ALPS - Adaptive Location-based Publish/Subscribe”. In Computer Networks (COMNET) 56(12): 2949-2962. 2012.

[7] François Vessaz, Benoît Garbinato, Arielle Moro, Adrian Holzer. “Developing, Deploying and Evaluating Protocols with ManetLab”. In the proceedings of NETYS'13. May 2013.[6] Behnaz Bostanipour, Benoît Garbinato, Adrian Holzer, “Spotcast – A Communication Abstraction for Proximity-Based Mobile Applications”. In proceedings of the 11th IEEE International Symposium on Network Computing and Applications (NCA’12), 2012.

[5] Benoît Garbinato, Adrian Holzer, François Vessaz. “Context-aware Broadcasting Approaches in Mobile Ad hoc Networks”. In Computer Networks (COMNET). Volume 54, Issue 7, May 2010, pp. 1210-1228. Elsevier.[4] Adrian Holzer, Saida Maaroufi, Samuel Pierre. “BROADTRIP: Broadcast for Transit in Platoons”. In the proceedings of the 7th IEEE International Conference on Wireless and Mobile Communications (WiMob’11). October 2011. [3] Adrian Holzer, François Vessaz, Samuel Pierre, Benoît Garbinato. “ PLAN-B: Proximity-based Lightweight Adaptive Network Broadcasting”. In the proceedings of the 9th IEEE Symposium on Network Computing and Applications (NCA’11) August 2011.[2] Benoît Garbinato, Adrian Holzer, François Vessaz. “Six-Shot Multicast: A Location-Aware Strategy for Efficient Message Routing in MANETs”. In the proceedings of the 9th IEEE Symposium on Network Computing and Applications (NCA’10) July 2010 pp.1-9. [Best Student Paper Award]. [1] Benoît Garbinato, Adrian Holzer, François Vessaz. “Six-shot Broadcast: a context-aware algorithm for efficient message diffusion in MANETs”. In proceedings of the 10th LNCS International Symposium on Distributed Objects, Middleware, Applications (DOA'08). Springer, pp. pp. 625-638, 2008.

protocol references

How can trust and privacy components can be integrated in the design of context-aware middleware APIs?

What is the adequate way to express data / peer aggregation in a high level communication API ?

What implementation strategies should be followed to provide privacy by design for such middleware?

UI

Today we’ll look at existing work on ad hoc infrastructure