the role of information in opportunistic networks

Waldir Moreirawaldir.junior@ulusofona.pt

March 6th, 2013SITILabs Brainstorming Meeting

The Role of Information inOpportunistic Networks

Agenda• Introduction

•Routing

•The proposal

•Experiments

•Conclusions

Introduction•Opportunistic Networking

– Contact opportunity

Introduction•Suitable for today's scenario

– Users consume/produce

– Need to be connected

Routing•Different proposals

– Mostly host-based

Routing•Travelling content

– May be of interest

– Users are prosumers

Routing•Content/interest-based delivery

– Improvements in routing

The proposal•Social-aware dLife

– Focus on the content

– Users' interests in it

•Goal

– Improve routing performance

The proposal•dLife

– Social weight towards dest.

– User importance

•dLifeIC

– Social weight towards interest shared by different destinations

Experiments•Scenarios

– Human traces

• Content-based routing

– Synthetic mobility

• Different mobility levels

Experiments

Experiments•Performance metrics

– Average delivery probability (i.e., ratio between the # of delivered messages and the total number of messages that should have been delivered)

– Average cost (i.e., number of replicas per delivered message)

– Average latency (i.e., time elapsed between message creation and delivery)

Experiments

• Communities help Bubble Rap

• Contact sporadicity affects dLife/dLifeIC

• Buffer constraint

• Node delivery ability increases with # of interests

• Bubble Rap relies on global centrality (bottlenecks)

• dLife is affected by buffer limitation

• Focusing on content helps dLifeIC

• Little interaction affects social-aware solutions

Experiments•Average cost

– Bubble Rap/dLife: increase with load

– dLifeIC: decreases

•Average latency

– dLifeIC: less time to deliver

Conclusions•Focusing on content

– Reach full delivery

– Very low associated cost

– Suitable delay

• Further investigation under very low mobility scenarios

Content has a important role inimproving information delivery ☺

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