The invention relates to a method in a mobile radio system having both digital and analog radio channels. An object of the invention is that a connection established on a digital radio channel often shall be possible to maintain even when the time dispersion on available digital radio channels exceeds...http://www.google.se/patents/US5257401?utm_source=gb-gplus-sharePatent US5257401 - Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels
