Transcript Services using SIM Application Toolkit Experiences gained
Services using SIM Application Toolkit
Experiences gained from GemXPlore Case
by
John-Olof Bauner & Peter Kriens ERICSSON Application Research Phone +46 8 757 0000 Fax: +46 4047020 e-mail: [email protected]
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ERICSSON Research
• Over 800 persons world wide • Goal – Gain understanding of our customer problems – Develop markets for our systems & terminals Applications Networks Consumer Mobility Media New concepts Usability
ERICSSON Application Research
• T/KA ± 25 persons • Research projects – PA/Mars, a personal assistant – e-box applications – marvin home server – open phone running general Java applications – configurable phone, a project to test new telephony concepts Akhnaton, Philip Glass 2:20
Services architecture
Clients Carriers POTS IP Service Provider ?
GSM Services Akhnaton, Philip Glass 2:20
Example Service: Parallel Ringing
Bob: Call Alice Service Provider Alice’s Office phone Alice’s Mobile • Ring the bell on many phones simultaneously – reachable in different locations – use cheapest channel • Requires setup information which phones to call – Conveniently from the client – Changes depending on time and location
Example: Shared phone book
Alice Bob Bob IP Service Provider GSM ESMS • Update the phone book from web Alice • More info than just phone number – e-mail, address, fax etc.
• Automatically change all phone books of people in a group • Everybody has correct info!
Example: Home automation
GSM e-box Service Provider Access Netw.
SMS to turn on the light and get alarm messages e-box gateway Local Netw.
• Control devices in your house from the phone: – Heating, light, sauna, oven etc.
• Get alarms when somebody breaks in – activate/deactivate • e-box empowered solution
Technology setup
Event: modify db Byte code ESMS generation IP Generate SMS PDU Listen to SMS PDU • ESMS is a program downloaded to the phone • Dynamic on the fly generation of ESMS in Java – checksum, header, security, byte codes • Use context information to create program GSM
Use case: Profile change
• A profile contains information how to use services • Profiles can change by – choice from the web or telephone – Automatic depending on time or location • For example: – Office profile » call your office phone and mobile in parallel, no SMS notification of e mail – On the road profile » call mobile, second voice mailbox, SMS notification of e-mail – Lunch profile » forward calls to secretary, store SMS notifications, allow intrusion
Example: Profile change
Service Provider GSM Profile database Ping SMS (silent) Cell identity info • Query the phone to detect location – Automate profile change using position id – Cell ids are globally unique location identifiers – Cell ids are kept secret by operators – Could be done by ERICSSON Mobile Positioning Center (MPC) as well – Works for every operator
Profile change
• Service “pings” customer by sending a “ping” SMS – silent SMS, not seen by customer • The provider updates profile in system – Profile can be changed from mobile menu – Profile can be changed from the web • Profiles can also be selected from the menu – list of profiles is downloaded by provider through an ESMS
Use case: Mobile Zapper
TV-Guide Web site TV guide Service Provider e-box gateway start stop IP preferences GSM record cancel TV guide • Program your video recorder from your phone!
• Select your TV viewing preferences on the web – Channel, Program types Akhnaton, Philip Glass 2:20
Mobile Zapper, TV Guide download
• Get the personal guide loaded in the night in your SIM card • The Service Provider gets the HTML pages with the TV Guide
Mobile Zapper
• It sends 1 ESMS per TV program – Title – Start time + duration + description • Information is stored in 2 files in the SIM card
Mobile Zapper, selection
• Select the program from the SIM Application TV Guide menu – get more information – select the program to be recorded by the video recorder at home • The phone sends an SMS with the program ID to the e-box • The e-box schedules the start/stop of the video recorder
Problems
• After initial beta, the GemXplore Case was very usable.
– we succeeded!
• Operator support required: Not an open market – card needs to be programmed by operator • Only Comviq did support SIM data download on the SMSC • Lack of documentation of GemXPlore Case – 8 bit SMS is also treated as data download – Many parameters are only documented in standards – high priority for display necessary in certain cases • Use of prototype phones – interaction between SIM card and mobile equipment
Problems
• No debug tools, all testing is done on the phone – long edit/compiler/debug cycle – lack of simulator – disassembler for PDU’s • Script language is extremely limited – hard to use syntax – lack of instructions (swap arrived too late in the update) – no variables • Suspect card to miss ESMS processing when phone is busy • Instruction set SIM card and security info is kept secret – we reversed engineered it partly at great cost of time
Future
• Limited application area for SIM Application Toolkit in the future after 3-5 years: – WAP – IP connectivity • Very convenient today for accessing many different services • Operators need to make it more open to make it useful for third party developers • Cell identifier is a very interesting possibility for location based services