Location awareness as an adjunct to mobility TF-Mobility Mark O’Leary July 8 th 2008 Copyright JNT Association 2007 1
In a nutshell… • Mobile devices use network technologies that can provide user location and context cues. • Location data can expand the variety of mobile applications through delivery of relevant, timely, personalised content reactive to dynamic environments. • Dual aspects: – allowing mobile nodes to determine their own position (relative to other resources) – allowing the network operator to monitor the position of nodes The education community could (should? ) deploy location-aware systems in a number of contexts to the direct benefit of their users. Copyright JNT Association 2007 2
Possible technologies • Log file extraction • e. g. eduroam RADIUS logs • GPS • Smartphone cell localisation • e. g. calibre [1] • 802. 11 ‘Beacon Stuffing’ [2] • Location inference from IP • (e. g. IP 2 GEO [3]) [1] http: //research. microsoft. com/users/jckrumm/Publications%202008/calibree. pdf [2] http: //research. microsoft. com/research/mns/papers/Wi. Fi. Ads-Hot. Mobile 2007. pdf [3] http: //research. microsoft. com/~padmanab/papers/sigmetrics 2001. ps Copyright JNT Association 2007 3
Standards • Developments at present seem focused upon the individual organisation or campus: the roaming case and/or the sharing of location data in a portable format is ignored. • Need a way for a user to advertise their location – to the spatio-temporal resolution of their choice – in a privacy-protecting manner. • Need a way for network operators to – share ‘bulk’ location data – tag resources for ‘location-relevance’ It might be necessary to initiate standardisation effort for various relevant location technologies. Copyright JNT Association 2007 4
Privacy concerns • Must be ‘Opt in’ – legal requirements • Uptake will depend on compelling applications for the user • ‘Blurring’ location data: – – – spatial cloaking (confuse with other people) vagueness (“home”, “work”, “school”) rounding measurements (e. g. snap to a 50 m grid) adding noise to measurements dropped samples Review policy in this area at existing deployments and work towards harmonised principles in the use of location data. Copyright JNT Association 2007 5
Data privacy sensitivity Copyright JNT Association 2007 6
Sample application 1 Eduroam ‘Weathermap’ • central radius logs parsed to generate graphical output • could be of use in performance and capacity planning and promoting the eduroam concept. Copyright JNT Association 2007 7
Sample application 2 ‘eduroam-plus’ • eduroam users still require local assistance to find resources like printers, vacant meeting rooms, first aid etc. at a site they haven’t visited before. • Location cues could be fed back via the eduroam system to a repository describing such resources, which could then generate a customised ‘portal’ for the user. • Such a system would be a good candidate for a federated approach? Copyright JNT Association 2007 8
Sample application 3 Conference Social Networking • Delegate at a conference builds a ‘target list’ of people they want to meet • Application on their mobile device notifies them when they are close to one of these people (and the target has indicated their status as open to approach) • Equally, could reserve periods of time when one wishes to avoid interruptions Copyright JNT Association 2007 9
JANET(UK) location trials • Context-relevant guidance & interactive maps incl. Place. Lab deployment • ‘RF firewalls’ – access control based upon requesting node location • Automated attendance registration through device presence • Asset tracking • Policy and implementation on the aggregation, storage and release of location data • Comparison of existing off-the-shelf location appliances Copyright JNT Association 2007 10
Proposed Activities 1. Establish a forum for sharing experience with and promoting location technologies 2. Develop a technical knowledge base (standards, issues, market, trends) 3. Examine privacy and policy issues 4. Develop and trial inter-NREN locationaware initiatives 5. Consider the impact of future locationaware services on general mobility support 6. Work with and influence existing standardisation efforts and open source projects Copyright JNT Association 2007 11
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