A Hybrid Model of Context-aware Service Provisioning Implemented on Smart Phones International Conference on Pervasive Services th June 2006 Oriana Riva Helsinki Institute for Information Technology Santtu Toivonen VTT Technical Research Center of Finland

Food Music Movie Sauna Print Art Traffic Look at the World from the User’s Perspective

User-centric Model The challenge –Locate anytime, anywhere relevant content available in our daily environments –Relevance has a user-specific definition Current practice –Collect context information –Use it to rank/filter content items Existing examples –Mobility-aware recommenders –Context-based applications –Remembrance agents

Problems with Current Solutions No complete access to user’s personal and contextual information –Privacy, trust, laziness... No usage of reviews, observations, and ratings expressed by previous clients –Content from professional service providers is impersonal, utility-oriented, static, out of date… –Success of Amazon, human daily practice... Our solution: Hybrid model of context-aware service provisioning Our solution: Hybrid model of context-aware service provisioning

Outline Motivations Hybrid model of context-aware service provisioning DYNAMOS Platform DYNAMOS Example Application Conclusions & Future Works * DYNAMOS Project (TEKES, VTT, ICT-Turku, Suunto,TeliaSonera)

Hybrid Service Provisioning Model SP Service Provider U User SP U U U U U U U U Service-generated, but user-annotated, content User-generated content Service-generated content U UU U SP

System- inaccessible System- inaccessible System- accessible Metadata-based Design U1 S1 U3 Service description SP1 User Profile U1 Service instance 1 User instance 1 User Context U1 User Note U3 Service Annotation U2 Traditional service provisioning system U2 Hybrid service provisioning system... Kayano running shoes are 50% discounted today Awful traffic jam here...

Outline Motivations Hybrid Model of Context-aware Service Provisioning DYNAMOS Platform DYNAMOS Example Application Conclusions & Future Works

DYNAMOS Reference Architecture DYNAMOS Core Clients Distribution Servers GPRS Service Content Internet Laptop GPRS DYNAMOS Core Modules Event Server Web Server Implemented in Java J2ME CLDC 1.0 and MIDP 2.0 Development using Nokia Series 60 phones Implemented in Java J2ME CLDC 1.0 and MIDP 2.0 Development using Nokia Series 60 phones

DYNAMOS Architecture Metadata Listeners –Specification and update of metadata information for users and service content Metadata Managers –Process and store metadata Matcher + matching functions –Category-based matching –Location-based matching Controller –Enforce control policies and preferences

Outline Motivations Hybrid Model of Context-aware Service Provisioning DYNAMOS Platform DYNAMOS Example Application Conclusions & Future Works

Case Study: Recreational Boaters in the Turku Archipelago

Requirements Study: Some Results Use of mobile phone for –Weather conditions and forecasts (95%) –News (40%) –Services (40%) To find out about services –70% consult printed material (especially harbor book) Limitations –Lack of event-related information –Out of date information –Static guide

DYNAMOS Sailing Application

Regatta Competition Aug th sailboats, 28 participants Nokia BT-GPS device

Evaluation Results Technical problems due to: -2G/3G handovers -GPS device disconnections -Feedback -Interest in social traces -”I passed from here, I saw this and I visited this” -Interest in multimedia content -Post visiting (”curiosity”) and pre-visiting -Importance of knowing in advance about available services -Personal and public usage of the system -Suggestions for other potential use cases -Risk of spam and trustworthy recommendations

Outline Motivations Hybrid Model of Context-aware Service Provisioning DYNAMOS Platform DYNAMOS Example Application Conclusions & Future Works

Conclusions and Future Works People found interesting our model of hybrid service provisioning Technically, the system can be deployed In small scale, trust problems and risk of spam can be smoothed –Communities, clubs, etc. August 2006: second regatta competition –More advanced context provisioning –More context functionality will be tested

DYNAMOS Project: Thank you!