Dear Saukriver, I pointed out the pg 3, #2.3 of the previously captioned URL to help clarify useage of the term 'throughput' to align with the term 'throughput' used by QCOM. Your question seems to be asking what happens to data rates and voice capacities as cell load increases. If I am mistaken, my apologies. If I am not mistaken, then you may examine the chart and determine what would happen to the theoretical max user speeds as the cell loads up to the average throughput levels. There is a constant tradeoff going on, is the point this chart makes. The peak rates and averaged rates are obviously different, the network can probably be configured to allow differing ratios of data//voice useage, thus a definitive answer to 'what happens if' does not seem possible.
I was not focused on part 2 to your question, but from what I have (correctly, or incorrectly) understood I would guess that voice capacity doubles from CDMA one to CDMA1X, but data rates are subject to cell loading and I would believe that voice requirements would take precedence over data rates. Again I would see this as one of the flexible, network-specific configuration issues that might not allow a rigid answer, but would require examining a flow graph showing the flux amongst the load priorities. Now that I look at your point #2, I would say that indeed I did read (somewhere) that as voice demand rises, data is turned down, and I would also intuit from the white paper of which I am so fond that this may still be an issue with 1XEV, although whether or not it is specific to voice demand vs data demand, or whether it is data demand vs data plus voice demand, you are correct, it is not possible to determine from that chart.
To isolate a single user terminal for peak data rates and determine how multiple voice users within a cell are impacting that single terminal's data rate appears to be what you really want to know. It seems probable if there are 30 voice users in a fully loaded cell, surely someone will be finishing a call while another is sending a call, so a momentary burst of high speed could be quoted as the speed of that single user (how big was that file, anyway?), or an *average* speed could be quoted, or some other number.
My apologies if the white paper did not help you answer your question. As far as the focus of the white paper being about financing...well, that really is the driver behind data rates, and how those data capabilities will be deployed anyway. So what is visible in the white paper may well be more relevant than what a spec. sheet indicates. My speedometer reads up to something like 100mph on my GMC van....but of course nobody wants to know the average speed I drive, except myself. Technical specs are going to change from network to network is my understanding, and location to location within a network, possibly.
MartinT |
