1 / 12

LIXE - Project Studying XML in Location-Based Services

LIXE - Project Studying XML in Location-Based Services. University of Jyväskylä, Faculty of Information Technology Prof. Jari Veijalainen Jouni Markkula Artem Katasnov Republica Corp. Eetu Ojanen Diego Ballvé. Architectures & Specifications Related to LBS.

kaori
Download Presentation

LIXE - Project Studying XML in Location-Based Services

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LIXE - ProjectStudying XML in Location-Based Services University of Jyväskylä, Faculty of Information Technology Prof. Jari Veijalainen Jouni Markkula Artem Katasnov Republica Corp. Eetu Ojanen Diego Ballvé

  2. Architectures & Specifications Related to LBS Location Interoperability Forum (LIF) • MLP - Mobile Location Protocol: • http://www.locationforum.org/publicdownload/LIF-TS-101-v2.0.0.zip Open GIS Consortium (OGC) • GML - Geographic MarkUp Language: • http://www.opengis.net/gml/01-029/GML2.pdf • WMS - Web Map Service: • http://www.opengis.org/techno/specs/01-047r2.pdf • WFS - Web Feature Service: • http://www.opengis.org/techno/RFC13.pdf Open Location Services initiative (OpenLS) • http://www.openls.org WAP Forum • WAP Location Framework (adoption of LIF MLP) Recently Open Mobile Alliance (OMA) • http://www.openmobilealliance.org

  3. General LBS Architecture • LCS (Location Service): provides location of mobile users. • LQB (Location Query Block): a wrapper of LCS into LIF Mobile Location Protocol (MLP). • LCA (Location Attachment Block): if needed, attaches location information to a request. • Portal service: the gateway to LBS. • LBS: information service utilizing location data. • Core spatial application and data services: building blocks for LBSs. • XML encoded messages • HTTP Post as binding mechanism

  4. X-Fetch Wrapper • Data conversion to XMLaccording to rules specifiedwith Data Extraction Language • Any input format • Any output XML format • Data Extraction Language (DEL) isevaluated and published bythe W3C • www.w3.org/TR/data-extraction

  5. X-Fetch Performer • Reading and parsing XML streams (and files) • Low memory consumption • Synchronous reading and writing • SAX application program interface • MAP file • Rules for data processing • Where to route the data • In which format to routethe data • J2EE compatible

  6. LBS Architecture and X-FETCH The blue blocks have to deal with: • XML processing (requests, responses) • Data streams (HTTP connection streams) • Message generation based on templates. +

  7. X-FETCH LBS Demo

  8. X-FETCH LBS Demo: process [1/2] • Gateway: Generates XML formated request to Location Attachement Block. • LAB Servlet: Performer processes HTTP request (XML) and generates a LIF MLP request for Location Query Block. • LQB Servlet: Performer transforms LIF MLP request into LCS protocol’s request for Location Server. • LQB Servlet: Wrapper reads LCS response and convert it into LIF MLP response. • LAB Servlet: Wrapper takes in LIF MLP response and combines with the original user’s request, forwarding it to Portal.

  9. X-FETCH LBS Demo: process [2/2] • Portal Servlet: Performer processes HTTP request from LAB and generates WFS request for Web Feature Server. • WFS Servlet: Performer processes WFS request into SQL (spatial) query for GML adapter. • GML Adapter: uses SQL to query Oracle 9i Database and, combined with Oracle SDO API, generates GML response. • WFS Servlet: Packs multiple queries results into a single WFS response (GML). • Portal Servlet: Performer processes WFS response and returns to client whether XHTML or GML, according to the request.

  10. Stage 2 Stage 1 Parking Place Stage 3 Music Festival • The environment is a Music Festival • Limited, temporarily densely populated area • Several stages • Several eating and drinking places • People active, mobile and social • Assumptions • People have mobile terminals • Supporting positioning • Positioning accuracy ~10 m Hamburgers Pizza & Beer

  11. Planned LBS • Concentration on “Pull” services (Mobile Originated Location Request) • Stage Information • The real-time schedule of performers • Text-based output • Find Food & Drink • Finding eating & drinking places according preferences and present location • Text-based and/or map based output • Navigation support • Find Friend • Finding identified friends • Map-based output • Meeting request • Text-based and/or map based output

  12. Implemented LBS • What’s Up page • Stage Info page • Restaurants (list) • Restaurant Info (more info about given restaurant)

More Related