�Laptops and WiFi-capable smartphones like the Apple iPhone become popular �many city governments and private entities propose citywide mesh networks. �We have wired broadband networks, 3G cellular, WiFi hotspots, do we still need Urban Wifi Mesh? �How clients actually use a metropolitan network? When do they use it? Clients ’ traffic demand? Google Wifi Network �Freely available outdoor wireless Internet service, deployed in Mountain View �Over 500 access points �Operate since August 16, 2006 �Limit individual client’s rate to 1 Mb/sec �Densely deployment �only 5 % of APs have a unique neighbor �most well-connected 10 % have more than eight potential next hops �the majority of clients are within two hops of the gateway, and less than 10 % are more than three hops away. Three User Populations �Local residents and businesses use it as a static WiFi mesh access network, a substitute for DSL or cable modem service. �Laptop users on campus and other public hotspot WiFi networks. �Smartphone users combine the ubiquitous coverage of cellular networks with the higher performance of wireless LANs
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