To: Mika Kukkanen who wrote (361 ) 7/29/1999 11:07:00 AM From: DaveMG Read Replies (1) | Respond to
Hi Mika,Do you understand that TDMA-based GSM (and IS-136) face an extraordinarily cumbersome and expense migration path to high speed data? Do you know that GPRS will require essentially a complete network overbuild in order to achieve 114kps? Do you understand that EDGE will subsequently require new handsets, on top of this new infrastructure, to push data rates only to 384kps+. Do you understand that Phase I of cdma2000 will yield 144kps data rates, double the voice capacity of existing IS-95 networks, and BE BACKWARD COMPATIBLE with existing handsets in the field? Do you understand the deployment advantages, and flexibility, of cdma2000's 1.25mhz design? Do you understand that operators with 5mhz of spectrum can mix and match voice channels and high speed data? Do you understand that Phase I can be deployed as a field upgrade without replacing existing infrastructure? Do you understand the tremendous economic advantage that this confers to IS-based, CDMA-centric, operators? The capital investment and performance deltas between TDMA and CDMA are shifting even more dramatically in the latter's favor. Meanwhile, Phase II of cdma2000 pretty much puts the nail in tdma's coffin longer-term. No, GPRS will not require a complete network overbuild. It is commonly misconceived that it will and would like to know where you got this misinformation. The costs of rolling out EDGE on top could be comparable to overlaying cdmaOne, which would also require new handsets too and at the cdmaOne stage has less data capacity.
