ARRANGEMENT FOR HANDOVER IN A MOBILE TELECOMMUNICATIONS NETWORK

摘要

The present invention relates to a system comprising first and second mobile telecommunications systems, for example DECT and GSM. The first mobile telecommunications system is arranged to serve a geographically limited area, while the second mobile telecommunications system serves larger geographical areas, for example a country, countries, etc. Mobile units are arranged for communication with the respective system. A transition zone is identified at the outer edge of the coverage area for the first mobile telecommunications network. When the mobile unit enters this area, the said unit detects the quality of the connection and initiates a transition to the second telecommunications network if the quality of the connection is below a predetermined value or if the quality of the connection comes near to this value. The transition between the different systems is thus initiated by the mobile.