When communication is established using a mobile radio terminal, the speed at which the terminal is moving is measured by monitoring the Rayleigh fading of the signal strength. Using this velocity indicative parameter, a threshold level which is used to determine if a handoff is required or not, can...http://www.google.ca/patents/US5239667?utm_source=gb-gplus-sharePatent US5239667 - Method of controlling handoff in cellular mobile radio communications system
