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Technology Stocks : Qualcomm Moderated Thread - please read rules before posting -- Ignore unavailable to you. Want to Upgrade?

To: Sully- who wrote (3132)	9/14/2000 8:51:49 PM
From: Sully-	Read Replies (1) \| Respond to of 197300

China will keep CDMA promise, Wu Jichuan says (14 September 2000) Minister Wu Jichuan from the Ministry of Information Industry (MII) recently reiterated that China has not changed its policy on introducing CDMA (code division multiple access) narrow-band technology from the U.S.-based Qualcomm. There were previous reports saying that China Unicom, the country’s second largest telecommunications operator, would cancel its CDMA plan. Wu criticized these reports for spreading misleading rumors, according to a Sept. 14 ChinaByte report. "In order to satisfy domestic demand for mobile communications, we must import and adopt the narrow-band CDMA IS 95 technical standard," Wu said. His statement has undoubtedly eased the American company’s concern about being kicked out of the world’s second largest mobile telephone market, the article noted. Currently, there is a common worry that CDMA technology may be outdated. However, industry insiders believe that before the wide deployment of a 3G mobile network in China, CDMA still has room for development for at least five years. There are currently 70 million CDMA users in the world, and the figure doubles every two years, according to a Sept. 13 cn-telecom.com report. China Unicom plans to increase its CDMA users to 10 million. If this happens, China will definitely become the world’s leading market in terms of its CDMA mobile communications, the report said. In Asia, Japan is currently the leading CDMA market, with approximately 10 million users. chinaonline.com

To: Sully- who wrote (3132)	9/15/2000 1:59:44 AM
From: engineer	Respond to of 197300

For all of you unfamiliar wiht the system design on CDPD, here are a few things about it. CDPD was orginally made to sniff out unused 30 kHz channels in the analog spectrum which were not carrying voice calls. It listened to the airwaves and found those ones not activly using it. But it has to drop the chanel and not interfere in a short time when a voice channel is requested by a new call, so the channel can go away at any time. This is not so bad in a lightly loaded system. But as the system cpapcity grows and the system gets more loaded, there is less and less unused channels and the thruput of hte system goes way down. IF and WHEN you get a CDPD channel, then you get 19.2k bps, but this is a burst rate not sustainable over a long period of time, as you get bumped and then have to sniff and reassign a new channel. This can mean a down time of seconds in a loaded situation. Now you can imagine that in a heavily loaded system such as AT&T one Rate plan where dropped calls come from not having enough capacity in the first place, there may be LONG periods of time where there are no unused voice channels, hence the CDPD system goes into a frozen queued state. So this may mean at peak times such as 5:00 PM, you may NEVER get a CDPD channel. If there are quite a few otehrs trying for the same non-existant channel, you all may block each other by queueing the sytem up so far taht it cannot unblock itself. CDPD was great when analog systems were not used, but in todays heavy use places, it does not fair well at all. I would be surprised if anyone were able to sustain more than 1200 baud in any major metro area anywhere. I have heard thruputs of less than 300 baud in NYC where congestion is high. "The king has no clothes".