A Short History of Wireless Data
A Short History of Wireless Data
- Wide Area Data
- CDPD
- 1991: CDPD patents filed by 3 IBMers (Miller, Moore, Pate, IBM Boca Raton)
- 1993: Initial CDPD specifications, carriers plus IBM. McCaw, IBM, PCSI
- 1995: Deployment of CDPD infrastructure
- 19.2 kbps, make use of idle channels in analog cellular system via "channel hopping"; TCP/IP compliant with support for mobile-IP like mobility routing
- Not viewed as a marketing success (yet): where are the subscribers? how pervasive is the coverage?