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Mobile Computing HEP UK System Managers Meeting March 2000, RAL John Gordon RAL/ITD Mobile Computing • • • • • Dec ‘99 Cybercafes Laptops PDAs GSM Phones MONARC Cybercafes • Can you use them to read your email? • Can you reach your resources? • Can you do it securely? Dec ‘99 MONARC Laptops • Thick - all the extras (7lb) • Thin - no CD, floppy (4lb) • Small - smaller screen and keyboard (2-3lb) Dec ‘99 MONARC Laptop Issues • • • • Dec ‘99 Networking Modems Power Printers MONARC 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 Dec ‘99 MONARC 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 Dec ‘99 MONARC Power • • • • Dec ‘99 The more spare batteries the better Foreign power adaptors Lightweight power supply Heavyweight power supply MONARC Printers • Lightweight Printers • Load all common drivers so that you can use other peoples printers Dec ‘99 MONARC 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. Dec ‘99 MONARC GSM futures • HSCSD 9.6 > 14.4 (+2x compression)>28.8 – due this year • GPRS - Packet switched data • UMTS - third generation Dec ‘99 MONARC 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 Dec ‘99 MONARC UMTS • • • • • • Dec ‘99 2GHz technology Licences being auctioned now Standards still being defined Phones being developed Probably 2002/3 128k-2Mb Phase 2 2010 - 100Mbps MONARC PDAs • Much smaller and lighter but restricted computing. • GSM via PC cards Dec ‘99 MONARC Phones • Phones and PDAs getting more similar • CeBit99 • WAP Dec ‘99 MONARC 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 Dec ‘99 MONARC