Wi-Fi proximity and context-aware browsing. A new approach for delivering local data. Our presentation for ICDT - 2012 conference. Shamonix, France.

1. Wi-Fi Proximity and
Context-aware Browsing
A new approach for delivering
local data
Dmitry Namiot Lomonosov Moscow State University
dnamiot@gmail.com
Manfred Sneps-Sneppe Ventspils University College
manfreds.sneps@gmail.com
ICDT 2012

2. About
• A new model for for accessing to local data for mobile
subscribers based on Wi-Fi proximity ideas
• Any existing or even especially created Wi-Fi hot spot could
be used as presence sensor that can open (discover) access
for some user-generated content.
• We can discover hyper local data as info snippets that are
valid (relevant) for mobile subscribers being at this moment
nearby some Wi-Fi access point.
• Possible use-cases for this application: distributing data in
Smart City projects, proximity marketing in malls and office
centers (campuses)

3. Contents
Introduction
Spot Expert (SpotEx)
Future development
Conclusion

4. Introduction
The common definitions:
• Context - location, identities of nearby people and objects,
and changes to those objects.
• Context awareness is defined as complementary element to
location awareness. Anything we can add to location
• Pervasive computing - deal with linking changes in the
environment with computer systems, which are otherwise
static.

5. Context-aware
Modern applications adopt a context-aware
perspective to manage:
d)communication among users and among
systems, or between the system and the user,
b) situation-awareness, like modeling location and
environment aspects (physical situation) or the
current user activity (personal situation)
c) knowledge chunks: determining the set of
situation-relevant information, services or behaviors

6. Wi-Fi and location
• The most popular approach for indoor-
positioning
• Wi-Fi location positioning is based on a grid of
Wi-Fi hotspots providing, in general, 20–30
meters location accuracy.
• The big question is costly infrastructure
preparation (what is a location for our base Wi-Fi
tags?)
• One alternative: Cooperative Location-sensing
system (CLS) is an adaptive location-sensing
system that enables devices to estimate their
position in a self-organizing manner

7. Location and LBS
• Do we really need location in all LBS? In the most
cases location is just an intermediate stage. It is a key
used in requests for geo-database
• The target in the most cases is geo-data. Context
aware information is the true goal for LBS
applications (for most of them)
• What if we provide context aware data directly,
without the location?
• Here comes the proximity: “if you are close (near)
to some then …”

8. Proximity projects
Some existing projects:
• AllJoyn
• Nokia Instant Community
• LocalSocial
• AROUND
Most of them targets end-user devices. Device to
device proximity. Our own project: device to
infrastructure proximity.

9. Spot Expert (SpotEx)
• What if we borrow from the traditional indoor
positioning schema the first stage only: detection
of Wi-Fi networks?
• This detection actually already provides some
information about the location – just due to local
nature of Wi-Fi network.
And as the second step we add the ability to
describe some rules (if-then operators, or
productions) related to the Wi-Fi access points.

10. SpotEx foundation
• Our rules will simply use the fact that the particularly
Wi-Fi network is detected. And based on this
conclusion we will open (read – make them visible)
some user-defined messages to mobile terminals.
• Actually it is a typical example for the context
aware computing. The visibility for user-defined
text (content) depends on the network context.
• This approach uses Wi-Fi proximity
• Any Wi-Fi hot spot works here just as presence sensor.

11. SpotEx components
• database (store) with productions (rules) associated
with Wi-Fi networks
• rule editor. Web application (including mobile web)
that lets users add (edit) rule-set, associated with
some Wi-Fi network
• mobile applications, that can detect Wi-Fi networks,
check the current conditions against the database
and execute productions

12. SpotEx – how does it work
• We can take any exiting Wi-Fi network
(or networks especially created for this service – the
most interesting case) and add some rules (messages)
to that network.
• Message here is just some text that should be
delivered to the end-user’s mobile terminal as soon
as the above-mentioned network is getting detected
via our mobile application.
• The word “delivered” here is a synonym for “available
for reading/downloading”.

13. SpotEx – use cases
The possible use cases:
• Some shop can deliver deals/discount/coupons right
to mobile terminals as soon as the user is near some
predefined point of sale. Proximity marketing.
We can describe this feature as “automatic check-in”
for example. Rather than directly (manually or via
some API) set own presence at some place (e.g.
similar to Foursquare, Facebook Places etc.)
with SpotEx mobile users can pull data automatically
and anonymously.

14. SpotEx – use cases
• Campus admin can deliver news and special
announces
• Hyper local news in Smart City projects could be tight
(linked) to the public available networks and delivered
information via that channel etc.
• The most interesting (by our opinion, of course) use
case: Wi-Fi hot spot being opened right on the mobile
phone

15. SpotEx – use cases
• Open Wi-Fi Access
Point right in the
mobile
• Add (link) proximity
rules for this access
point exactly
• Rules will define data
chunks (info snippets)
visible for users
nearby this phone

16. SpotEx – security issues
• Our approach does not touch security and
connectivity issues.
• You do not need to connect mobile subscribers to
your hot spot.
• SpotEx is all about using hot spot attributes for
triggers that can discover the content.
• SpotEx threats Wi-Fi hot spots just as sensors.

17. SpotEx productions
Each rule looks like a production (if-then operator).
The conditional part includes the following objects:
Wi-Fi network identity,
signal strength (optionally),
time of the day (optionally),
client ID (MAC-address)
history of visits

18. SpotEx productions
In other words it is a set of operators like:
IF network_SSID IS ‘mycafe’ AND
time is 1pm – 2pm THEN
{ present the coupon for lunch }
It is like production based expert system.
We can use well known algorithm for the
Processing, e.g., Rete

19. Implementation
• Based on Android OS.
• WiFiManager from Android SDK
• This API let us pickup the following information:
SSID - the network name.
BSSID - the address of the access point.
capabilities - describes the authentication,
key management, and encryption schemes
supported by the access point.
frequency - the frequency in MHz of the channel
level - the detected signal level in dBm.

20. Implementation
• IF network_SSID IS ‘mycafe’ AND level > -60db
AND time is 1pm – 2pm AND network_SSID
‘myStore’ is not visible THEN {present the deals
for dinner}
• {present the deals for dinner} is some data
(information) snippet presented in the rule. Each
snippet has got a title (text) and some HTML
content (or a link to external site for example).
Snippets are presenting coupons/discounts info
for malls, news data for campuses etc.

21. Client’s application
• Client-side application
• Shows visible
networks
• Shows working rules
(conclusions)

22. Context-aware browsing
• Conclusion for rules present set of context-aware
data
• De-facto users are browsing context-aware data
chunks
• Each data chunk is presented a a mobile web page
(SpotEx creates web pages automatically when you
set new rule)
• SpotEx is actually context-aware browser

23. Wi-Fi chat
• Hyper-local
communication tool
based on SpotEx
• Web chat and
communication forum
for the mobile users
nearby the same Wi-
Fi access point

24. Future development
• Markup for rules – e.g. describe context-aware data
right in HTML. Custom defined attributes in HTML5
defines conditions.
• Native context-aware browser: web intents
• Bluetooth support
• Wi-Fi direct support

25. Conclusion
• a new context-aware browsing model for mobile
users based on the ideas of Wi-Fi proximity.
• can use any existing as well as the especially
created (described) Wi-Fi network as presence
trigger for discovering user-defined content
• completely software based and does not require the
upfront space preparations.
• supports ad-hoc solutions
• could be used for delivering commercial information
in malls, distributing data in Smart City projects,
sharing news feeds for office centers and campuses

26. About us
International team: Russia - Latvia (Moscow –
Riga – Ventspils). Big history of developing
innovative telecom and software services,
international contests awards
Projects examples we are in:
open API for telecom,
web access for telecom data,
mobile web applications,
M2M applications, context-aware computing.