1 / 16

Mobile Computing

Mobile Computing. HEP UK System Managers Meeting March 2000, RAL John Gordon RAL/ITD. Mobile Computing. Cybercafes Laptops PDAs GSM Phones. Cybercafes. Can you use them to read your email? Can you reach your resources? Can you do it securely?. Laptops.

hwarrington
Download Presentation

Mobile Computing

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. Mobile Computing HEP UK System Managers Meeting March 2000, RAL John Gordon RAL/ITD

  2. Mobile Computing • Cybercafes • Laptops • PDAs • GSM • Phones MONARC

  3. Cybercafes • Can you use them to read your email? • Can you reach your resources? • Can you do it securely? MONARC

  4. Laptops • Thick - all the extras (7lb) • Thin - no CD, floppy (4lb) • Small - smaller screen and keyboard (2-3lb) MONARC

  5. Laptop Issues • Networking • Modems • Power • Printers MONARC

  6. Laptop Networking • Ethernet trivial, wireless possible • DHCP • assigns IP number(s), so no network setup • Many HEP sites support it, may have to register (so know your MAC) • PPTP • VPN, dialup over the Internet • tunnel through firewall, with authentication MONARC

  7. Modems • ISDN (2x64kbit) - good if available • V.90 56kb - but probably won’t deliver • dialback - lab pays • ISP with local number • Global dialler (IBM, GRIC) • calling card • Need phone adaptors to travel MONARC

  8. Power • The more spare batteries the better • Foreign power adaptors • Lightweight power supply • Heavyweight power supply MONARC

  9. Printers • Lightweight Printers • Load all common drivers so that you can use other peoples printers MONARC

  10. GSM • Mobile phone to laptop via PCMCIA, Serial, or IR • 9600bps (but improvements in sight) • Slow but very mobile (car, hotel, plane, beach, meetings) • Dialback can reduce costs but international calls cost to receive as well. MONARC

  11. GSM futures • HSCSD 9.6 > 14.4 (+2x compression)>28.8 • due this year • GPRS - Packet switched data • UMTS - third generation MONARC

  12. GPRS • GSM timeslices between 8 channels which all talk to different base stations to use best signal. • GPRS uses several (all?) of these in parallel • up to 115kbps • connects to Internet or X.25, VPNs • phone always accessible • pay per packet • Due in 2000 but no sign of services yet • Probably restricted to network devices MONARC

  13. UMTS • 2GHz technology • Licences being auctioned now • Standards still being defined • Phones being developed • Probably 2002/3 128k-2Mb • Phase 2 2010 - 100Mbps MONARC

  14. PDAs • Much smaller and lighter but restricted computing. • GSM via PC cards MONARC

  15. Phones • Phones and PDAs getting more similar • CeBit99 • WAP MONARC

  16. WAP • Wireless Access Protocol (Web browsing from a phone) • Web server needs to support a few extra MIME types (eg .WML). • Pages marked up in WML (a flavour of XML) • Phone connects to WAP server at ISP • can then connect to other servers via Internet • Once HEP starts serving data via XML it will be easyto extend to WML MONARC

More Related