There are a couple of companies that make WiFi roam quite well.
Amongst others...
RoamAD (http://roamad.com/) is a good example of a commercial company with rollouts that make WiFi roaming work.
Cohda Wireless (http://www.cohdawireless.com/) is a startup that also has a roaming solution, as well as some novel solutions to the non-line-of-sight problem that you mention. Actually, increasing the power doesn't fix the non-line-of-sight performance. The multipath increases with the power, so by boosting the power, you are also boosting the multipath components. The problem is solvable with some clever receiver algorithms which are still 100% wifi compatible.
A number of handset manufacturers are making handsets which switch between gsm/3g and a local wifi hotspot. Say you want to download a bunch of data (emails, work documents, etc). You head to the nearest hotspot and the handset switches to wifi via the internet (still maintaining the connection). You grab the data you want and then keep driving. This, as well as voip via wifi, will definitely take the cream out of the cellular profits.
The article doesn't say anything about putting a camera in the house. It talks about possible camera surveillance of houses which require repeated call outs.
You didn't RTFA and neither did the editor or submitter.
The 802.16 spec specifies two RF operating ranges. Less than 11GHz for non line of sight (NLOS) channels, and 10 to 66GHz for line of sight channels. Non-line of sight would typically be for links within the urban clutter. Line of sight would typically be for fixed backhaul and hence higher capacity links.
Assuming a constant modulation and coding scheme, the data rate is proportional to the bandwidth. The bandwidth for 10-66GHz is typically 25MHz or 28MHz, which is wider than the 802.11a/b/g standards. Greater bandwith means greater data rate. (Assuming your channel quality is equal).
The highest order modulation scheme and coding rate for 802.16 is 256QAM and rate 7/8 coding. This gives a data rate of 113Mbits/s for a 20MHz channel.
The other major advantage for 802.16 over 802.11 is the longer cyclic prefixes used. This enables greater multipath immunity. Multipath is caused by a reflection of the signal arriving at the receiver before or after the strongest received signal. Multipath effects become greater once you move outdoors and have increased separation between transmitter and receiver. Also, there are more obstacles for the signal to reflect off.
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These aren't the drones you're looking for, you can go about your business. Move along.
There are a couple of companies that make WiFi roam quite well.
Amongst others...
RoamAD (http://roamad.com/) is a good example of a commercial company with rollouts that make WiFi roaming work.
Cohda Wireless (http://www.cohdawireless.com/) is a startup that also has a roaming solution, as well as some novel solutions to the non-line-of-sight problem that you mention. Actually, increasing the power doesn't fix the non-line-of-sight performance. The multipath increases with the power, so by boosting the power, you are also boosting the multipath components. The problem is solvable with some clever receiver algorithms which are still 100% wifi compatible.
A number of handset manufacturers are making handsets which switch between gsm/3g and a local wifi hotspot. Say you want to download a bunch of data (emails, work documents, etc). You head to the nearest hotspot and the handset switches to wifi via the internet (still maintaining the connection). You grab the data you want and then keep driving. This, as well as voip via wifi, will definitely take the cream out of the cellular profits.
The article doesn't say anything about putting a camera in the house. It talks about possible camera surveillance of houses which require repeated call outs. You didn't RTFA and neither did the editor or submitter.
Google have the choice to decline business in China the same way you have the choice to avoid buying anything manufactured in China. Do you?
The 802.16 spec specifies two RF operating ranges. Less than 11GHz for non line of sight (NLOS) channels, and 10 to 66GHz for line of sight channels. Non-line of sight would typically be for links within the urban clutter. Line of sight would typically be for fixed backhaul and hence higher capacity links.
Assuming a constant modulation and coding scheme, the data rate is proportional to the bandwidth. The bandwidth for 10-66GHz is typically 25MHz or 28MHz, which is wider than the 802.11a/b/g standards. Greater bandwith means greater data rate. (Assuming your channel quality is equal).
The highest order modulation scheme and coding rate for 802.16 is 256QAM and rate 7/8 coding. This gives a data rate of 113Mbits/s for a 20MHz channel.
The other major advantage for 802.16 over 802.11 is the longer cyclic prefixes used. This enables greater multipath immunity. Multipath is caused by a reflection of the signal arriving at the receiver before or after the strongest received signal. Multipath effects become greater once you move outdoors and have increased separation between transmitter and receiver. Also, there are more obstacles for the signal to reflect off.