Comment Not Surprising (Score 4, Informative) 144
There are dozens of reasons why Wi-Fi doesn't scale to the masses. Especially outdoors or in large spaces. Here are a few:
- Wi-Fi is half-duplex. Only one transmitter can broadcast on a channel at any given time. If the transmitting radio is slow (weak connection, older technology, bad-driver, etc...), then all other devices must wait for the transmission to end before they can get their airtime to transmit.
- A Wi-Fi radio that conforms to the Wi-Fi spec must co-operate when on the same channel as other wireless networks near it. This means that the google APs should be honoring the management traffic and broadcasts from other Wi-Fi radios near them. In a place like Mountain View, there is a *LOT* of Wi-Fi.
- 802.11n performance is dependent on multi-pathing. An AP on a pole in the middle of a park doesn't give much in the way of surfaces to reflect a signal off of. You end up at my first point- slow transmission, lower cell capacity.
- While two clients on an AP each can "hear" the APs transmissions, they may not "hear" each others'. Collisions galore.
- The ISM bands that Wi-Fi operates in are full of non-Wi-Fi interference. Wireless baby monitors are notorious for killing Wi-Fi, as are cheap wireless video cameras. Cordless phones,motion detectors, microwave ovens, remote control toys all play a part in the general noise within these RF bands.