Clearing Cellular Gridlock With Software

CELLULAR PHONE CALLS MAY hop all over the place, but the networks themselves aren't very nimble. If lots of motorists in a traffic jam phone home at once, for example, half of them could get busy signals because there's no way to allocate more channels to the congested area. Someone sending a large data file can't order extra bandwidth. And U.S. cellular systems won't handle foreign modulation schemes, such as Europe's GSM.

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