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To: 49thMIMOMander who wrote (9957)	3/20/2001 7:25:08 PM
From: carranza2	Read Replies (1) \| Respond to of 34857

I'm your mesenger boy today, Illmarinen It's all Greek to me: Thanks carranza2, more math for llmarinen Assume 3/9 or 4/12 which is 3 cells/9 sectors or 4 cells/12 sectors - popularly used reuse patterns. 5 MHz bandwidth gives you 5000/200=25 GSM carriers. Each carrier is 200 kHz. Carriers per sector assuming 4/12 sectorization = 25/12=2.08 carriers per sector assuming 3/9 sectorization=25/9=2.77 This is because we cannot reuse carriers due to adjacent channel interference. A few channels in the carrier would go away for control. The best we can get is 2 carriers per sector. Each carrier has 8 time slots with each time slot carrying 10kbps. Assuming 4 time slots assigned to GPRS we get 40kbps per carrier; i.e 80 kbps for two carriers i.e 80kbps/sector correct me if i am wrong anywhere.

To: 49thMIMOMander who wrote (9957)	3/20/2001 10:30:41 PM
From: mightylakers	Respond to of 34857

You wonder how GSM setorization works? How about divide the channels into 3 sectors? How about the 3 sectors capacity is in fact less than an Omni cell? it is using sectorize cell to improve frequency reuse( from 7 to 4 in a three sector cell) in trade off with a cell capacity? However in CDMA, the frequency reuse is 1 all the way and it is not dividing the channels by sectors, but to add additional independent channels into the other sectors. Granted the interboundary interference limits the number of sectors, but it is still a light year ahead of what GSM/TDMA can offer.