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To: rf_hombre who wrote (8788)	1/11/2001 7:00:29 PM
From: 49thMIMOMander	Respond to of 34857

WAP works everywhere on the the slow control channel (the 10-20 second response) but only in upgraded networks with data moved in the 10kbps voice slot and thus faster response times. Additionally one earlier had to pay an extra fee for this "data" feature in Finland, now Sonera provides it automatically to all users (GPRS is now sold for a fixed monthly pay, $14??) That, basically, takes care of the response time. (assuming the rest of the path doesn't mess up, including the service provider) The power consumption is mostly, as you point out, the transmission, so there the goal must be to minimize transmits, one of things I have understood WAP goes for and achieves. After that firing up the receive parts is the main problem, assuming 0.07um DSPs and low power memory the handset processing will be a very small part of the power budget in the future (compare palmtops,MP3 players,etc) But at this point the amount of data recieved is the main limitation and then becomes a function of compressing that data, for example by using preprogrammed "objects" for those (free) advertisements. Compare to running a java applet which produces all those pixel objects on the screen instead of transfering them one by one. My point that most animations can be transferred and run with very few mWs from the transmission part, including the rx-RF. One interesting aspect is the difference between receiving(or transmitting) a few bits using power efficient "regular GSM" or using faster rates but more power wasting EDGE and additionally adapting to the minimum signal-to-noise level possible. (a task for the network to handle and control) In terms of how many slots one need to fire up the RF parts for it is still a question of minimizing the amount of data as well as loading up the data in consecutive slots, that is, high burst rates. But I'm sure it is going to be just as confusing at first as the advertised stand-by times for old GSM phones and old networks, "stand by times depend on your network". But the network can already now read the time since last full charge as well as usage since that, soon smart batteries,etc, so I assume the operator could minimize advertisement if the battery is low, maybe "allow" user settings to do the same??? (compare banners on internet,etc) I have thought of another fortune by selling firewalls stopping battery wasting and pocket radiating banners?? Ilmarinen.

To: rf_hombre who wrote (8788)	1/16/2001 7:31:28 PM
From: mightylakers	Read Replies (1) \| Respond to of 34857

It is not clear to me at this point,if GPRS can make use of Discontinuous Reception (DTX) It can be done through PPCH, Packet Paging Channel . By paging the MS before the packet data transfer, you can have Discontinuous Reception. However that PPCH is not always allocated, which would be indicated by the BCCH. On the other hand, if packet data traffic channels is used for the uplink, MS must monitor the downlink timeslots continuously for the PACCH, Packet Associated Control Channel. Another problem is that MS need time to perform adjacent cell signal level measurement, and that can only be done when the MS is not doing any transmission/reception. So if you have more timeslots assigned to you, then you can't do that measurement in those time slots, which means you have less time to do the measurement therefore the possible degraded performance. GPRS is not doing anything new to actually improve the spectrum efficiency significantly. It is not improving the capacity. It is a little better than HSCSD, but I doubt it can do much better.