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| 116 | FCC to ditch flawed Mobility Fund II over unreliable 4G LTE coverage maps (簡訳:FCC、信頼性の低い4G LTEカバレッジマップ上でMobility Fund IIに欠陥を捨てる) | --- | |
| FierceWireless: Wireless | 2019-12-06 03:00 | ????0? | |
| The year-long investigation included nearly 25,000 speed tests in 12 states. According to the report, FCC staff achieved a minimum download speed of 5 Mbps where carriers claimed to have coverage in 45% of tests for U.S. Cellular, 63.2% of for T-Mobile and 64.3% for Verizon. Tests couldn’t find any 4G LTE signal for 21.3% of drive tests on T-Mobile’s network, 16.2% on Verizon’s network, and 38% on U.S. Cellular’s, “despite each provider reporting coverage in the relevant area.”The FCC undertook its own investigation into the Verizon, T-Mobile and U.S. Cellular maps after early challenge results and concerns from smaller operators and industry groups called in question the accuracy of coverage maps. That includes the Rural Wireless Association, which previously claimed Verizon “grossly overstated” its nationwide 4G LTE reach, particularly in rural areas. During the challenge process, where stakeholders could dispute carriers’ coverage claims, more than 20 million speed tests were submitted to the FCC. “I thank the FCC for its findings that the MF II initial eligible areas maps are fatally flawed, and its focus on improving the maps. The maps overstated coverage because the parameters relied on by the FCC model overstate coverage,” said CCA president and CEO Steven Berry in a statement. “I welcome the recommendation to update data specifications, including signal strength, cell loading factors, cell edge probability, clutter factors, and fading statistics.”The FCC report also showed large discrepancies between the challenger-submitted data and staff results. For example, when comparing a subset of challenger submitted speed tests (87,958) and FCC tests that were conducted within 100 meters of each other, challengers recorded zero Mbps in 60.8% of the tests, and at least 5 Mbps only 22.2% of the time, while the FCC results recorded zero Mbps in only 4.4% of tests that connected just to 4G LTE, and 23.2% when any network connection was present. The commission hit the 5 Mbps threshold in 71.4% of tests on 4G LTE and 54.8% overall.“The causes of the large differences in measured download speed between the staff and challenger speed tests taken within the same geographic areas, as well as of the high percentage of tests with a download speed of zero in the challenger data, are difficult to determine,” according to the report. “Discrepancies may be attributable to differences in testing methodologies, network factors at the time of test, difference in how speed test apps or drive test software process data, or other factors.” -- ???????? | |||
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