A number of different mechanisms are proposed for effectuating the delivery of digital data messages to mobile stations which have currently selected an analog control channel. In one method, a signal is sent to the mobile station instructing it to make a server reselection and choose the best available...http://www.google.de/patents/US6163704?utm_source=gb-gplus-sharePatent US6163704 - Delivery of subscriber digital data messages in a dual mode cellular telephone network
