UK is a big deployer of CCTV (closed circuit television) cameras: there is one for every 14 people.
But the cameras are expensive, and once you have installed one and wired it back to base, it is fixed and cannot move.
So if a crime moves round the corner, it cannot be spotted.
Westminster City Council in London came up with a pilot scheme based on five wireless cameras monitoring Soho Square.
A network of wireless LAN bridges covers the square.
The network of wireless LAN devices is then plugged into CCTV cameras, and provide access to mobile workers armed with laptops or maybe some specialist devices.
More in BBC Technology.