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To: brian h who wrote (23754)	3/5/1999 10:51:00 AM
From: Clarksterh	Respond to of 152472

Brian - 1. Is HDR technology for CDMA only? Or it can be applied to TDMA, GSM and analog phone gears? Of course almost any digital technology can increase their data rates and thus technically could call their new system High Data Rate (HDR). But as used as an unqualified acronym in the cell industry, HDR is an extension to CDMAOne and is incompatible with other technologies. 2. SiG. Can it be applied to GSM, TDMA, Analog phones to make them more efficent too? Yes, but it needs to be remembered that CDMAOne gets much more benefit out of this. CDMAOne is less power and space efficient in almost all areas but RF power transmitted, and thus any savings in the processing area effects CDMAOne total power and space to a much greater degree. 3. SiG. Will it make Globalstar's future phone down to the size comparable to the current celluar phone's? Don't know the full answer to this, but I suspect that the Globalstar phones will always require a fairly large antenna. (BTW - the Globalstar phones aren't actually all that big. They are significantly smaller than the cell phones of ten years ago.) 4 What is the limit on HDR technology? The user stills need to use minutes from celluar providers? Can it be sold to AOL type ISPs? the market will be really big if that is the case. Don't know the answer since this is a strategy question, and there are many possibilities. Hope this helps. Clark

To: brian h who wrote (23754)	3/5/1999 11:03:00 AM
From: engineer	Read Replies (3) \| Respond to of 152472

HDR is a CDMA thing, but there is something like it proposed for GSM. Not sure if they can really do it wiht the capacity contraints they have right now. TDMA cannot get there....Have you EVER seen any advertised TDMA data system? I can't recall one yet. By this, I mean one which is in the same channel as the voice, not the CDPD overlay that they have around. SiG is a circuit technology and can be applied to anything. It could make laptops lower power if they used it to drive analog circuits in that. the good features of this is that it is alot faster transistors with alot lower operating voltage and low noise. these are great features for analog circuits. but the added advantage is that it is based on an overlaying of the standard silicon technology, so you can also build todays most complex digital circuits on the same chip. In todays MSM chips, almost 20% of a chips operating power is just driving the I/O pins, so if you can integrate this you save alot of power. Globalstar phones will get alot smaller in the future. It is just the point in evolution that they are at. Imagine what happens when they get to 6th generation chipsets.....the first CDMa portable was 16 onces and was almost 10 inches long by 3 inches wide. (CD7000) HDR is just another way to use the frequency space that a carrier has. It consumes 1.25 Mhz of bandwidth and provides up to 1.5 Mbps data service on this. It can support alot of users at 38k bps or a few users at 1.5 Mbps. the thought is that it will count packets and charge for data delivered, not minutes of use. It will be a service in which te throughput is not totaly guaranteed, but the delivery would be. this is just like cable modems are today, in that they degreade when 100's of users are on the circuits, but you are still guaranteed a response in a reasonable amount of time. HDR could be used as a wireless ISP service, after all it is just a large packet pipeline.