Now we know where Starfleet originally got the communicator...

Left to right: Brent Spiner; Paul Jacobs (President, Subscriber Products, Qualcomm); John De Lancie; at the CTIA show in March 1997

Photo by Phil Karn

Here's a white paper I wrote two years ago on mobility within cellular packet data networks. I argued that the Mobile IP protocol -- on the very rare occasions it is even needed at all -- is best implemented by the user on an end-to-end basis. Unfortunately, I have been unable to dissuade the carriers from mandating it -- plus lots of other dubious functionality -- in the standards for CDMA packet data services. This could help explain why CDMA packet data still isn't available to the general public.

Basically, the carriers have yet to even understand the end-to-end principle, much less accept it.

Here's a very readable introduction to the basic principles behind Qualcomm's CDMA (Code Division Multiple Access) technology for digital cellular telephony in compressed postscript. This document is 58 pages long.

Here is a paper I wrote on CDMA packet data (TCP/IP) services for the first USENIX Mobile and Location Independent Symposium. It is also in compressed postscript.

In case you're suffering from insomnia, here's the CDMA Common Air Interface (CAI) that we submitted to the Telecommunications Industry Association (TIA) for standardization in 1992. This is a directory of compressed postscript files. The actual standard, IS-95, is copyright by the TIA so we are unable to place it on line; however, it not that much different from the original CAI. TIA standards are available from:

Global Engineering Documents
15 Inverness Way East
Englewood, CO 80112
1-800-854-7179 (voice, USA & Canada)
1-303-792-2181 (outside USA & Canada)
1-303-397-7935 (fax)
Qualcomm's CDMA Main Page

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