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Testing 3G Networks Across the US
PCWorld recently tested the 3G networks of AT&T, Verizon, and Sprint in 13 different cities across the US. They've now posted the results, which show that Sprint and Verizon are neck-and-neck for reliability, while AT&T has consistently higher upload rates. From the article: "Across more than 20 testing locations in each of the 13 cities we tested, Verizon had an average download speed of 951 kbps. Verizon demonstrated good reliability, too; the network was available at a reasonable and uninterrupted speed in 89.8 percent of our tests. Sprint's 3G network delivered a solid connection in 90.5 percent of our 13-city tests. Sprint's average download speed of 808 kbps across 13 cities wasn't flashy (at that speed, a 1MB file downloads in 10 seconds), but dependability is an important asset. The Sprint network performed especially well, both in speed and in reliability, in our test cities in the western part of the United States. The AT&T network's 13-city average download speed in our tests was 812 kbps. Its average upload speed was 660 kbps. Reliability was an issue in our experience of the AT&T system: Our testers were able to make a connection at a reasonable, uninterrupted speed in only 68 percent of their tests." What have you noticed about the various carriers in your city?
In a mobile culture like America's, we live a significant portion of our lives on the road. On holidays like today, we aren't, like 19th century Europeans, stuck in our hovels waiting for Ebenezer Scrooge to hand deliver a Christmas duck. Rather, we get out and drive, drive, drive all over this great, goddamned country.
So there's only so far 3G networks can take us if the coverage is only within city limits. When our cars are hooked up to cellular networks for data services, what good is it to have exceptional coverage in town when you're 100 miles from the next town? Empty spaces and big skies just prove how big this place really is, and it's all about living and moving and getting out there and getting to the next place that is what it's all about, man.
Get me some coverage in Yosemite. Death Valley. Appalachia. Crater Lake. Yellowstone. Shasta. Mt. McKinley. Grand Canyon. From Blaine, WA to Miami, FL. San Diego, CA to Eastport, ME. Cover it all and let us get on with really living in this great big country of ours.
Disclaimer: I work for a Data Card Manufacturer
Without the actual procedure for the tests, it is difficult to say if PCWorld'ss are any good. I am not familiar with the software used as no major industry provider uses it. The standard tool in the industry is Windcatcher
It really depends on the way the test is run. The problem actually relates to the TcpWindowSize as it should be increased to at least 128Kb for HSPA based networks and for CDMA as well.
Another major issue is that Data Cards don't inherently support streaming. Streaming is often used as a secondary PDP context and this will have a major negative effect. Were they in a handover region or not? On HSPA, every other cell is an interferer so throughput should be measured with a Single Carrier in the active set. It is still possible to be in a handover zone while in a parked car.
Did they use the carrier supplied good coverage locations? Randomly may not cross the panaroma of RSSI.
As well, the latest modem from Novatel Wireless is the USB760. I also believe the latest Sierra Wireless card is the compass something or other. Did they use a Y Cable? Did they use an external antenna? What model of PC did they use as TRP/TIS makes a huge difference in low coverage areas?
Without more data, I would still say there isn't sufficient evidence to form any conclusions from their article.