| 摘要 |
<p>A method and apparatus for coordinating the transfer of communications control from one independent radio communications system to another. The last message received by the home and roam systems from the remote unit has the associated radio signal strength and time of reception stored at each system. The time and signal strength of a current message is calculated by both the roam system and the home system. If the amount of time elapsed between the last and the current message exceeds a predetermined amount of time or if the signal strength exceeds a predetermined threshold, the roam system requests transfer of control of the processing of the current message from the home system. If the difference of the current message signal strength exceeds a predetermined amount, the request of the roam system is granted.</p> |
