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

To: Eric L who wrote (5504)	12/16/2000 9:58:39 AM
From: samim anbarcioglu	Read Replies (2) \| Respond to of 197001

Eric, I said << GPRS is NOT an air interface. >> Then you offered: >>GPRS involves overlaying a packet based air interface on the existing circuit switched GSM network. << That sentence is simply incorrect, I think it is simply misstated. The air interface that GPRS is designed on top of, is Time Division Multiple Access, which is what GSM uses as its air interface. The first link you offered says it simply and correctly: Air Interface -- Physical Layer Multiple Access and Radio Resource Management Principles On the physical layer, GSM uses a combination of FDMA and TDMA for multiple access. comsoc.org Air interface means physical layer. While GPRS does have a physical layer, GPRS itself is not a physical layer, it is a service that uses the physical layer. regards, Sam A.