RU99121200A - DEVICE AND METHOD FOR RADIO COMMUNICATION - Google Patents

Claims (15)

1. A radio communication device comprising a processor for generating a first signaling message for transmission to a first communication system having a first pilot signal, and a transceiver coupled to said processor for transmitting a first signaling message to said first communication system and for receiving a first pilot signal and a first acknowledging the receipt of a message from a first communication system in which said processor automatically generates a second signaling message for transmission to a second communication system having a second pilot Igna only if said transceiver does not receive the first acknowledgment message and receives the first pilot signal.  2. The radio communication device according to claim 1, further comprising a user interface attached to said processor for generating a first set of dialed characters and a memory attached to a processor for storing said first set of dialed characters, wherein said signaling messages both comprise said set of dialed characters.  3. The radio communications apparatus of claim 2, wherein said processor restores said first set of dialed characters from memory to generate a second signaling message.  4. The radio communications apparatus of claim 3, wherein said first and second signaling messages are call initiation messages.  5. The radio communication device according to claim 3 or 4, wherein said processor comprises a processing unit for generating said first and second signaling messages and for generating an initiation delay signal and a user interface unit for storing said first set of dialed characters in memory and for providing a first set the dialed characters to the call processing unit in response to the initiation delay signal.  6. The radio communication device of claim 5, wherein said call processing unit sets the initiation delay signal to a first logical value when said radio communication device requests a first or second communication system, and to a second logical value when a radio communication device has captured said first or second radio communication systems.  7. The radio communication device according to any one of claims 1 to 6, wherein said first and second signaling messages are registration messages.  8. A method for automatically switching between a first communication system having a first pilot signal and a second communication system having a second pilot signal, said method comprising the steps of receiving a first pilot signal, generating a first signaling message for transmission to the first system communication, transmit the first signaling message to the first communication system, automatically generate a second signaling message for transmission to the second communication system only if the first acknowledgment message is not received s from the first communication system.  9. The method of claim 8, further comprising the steps of: generating a first set of dialed characters and storing said first set of dialed characters in memory, said first and second signaling messages both containing a first set of dialed characters.  10. The method according to claim 9, in which the step of automatically generating a second signaling message comprises the step of recovering from memory the said first set of dialed characters.  11. The method of claim 10, wherein said first and second signaling messages are call initiation messages.  12. The method according to claim 10 or 11, which further comprises the step of generating an initiation delay signal, wherein the step of recovering from the memory of said first set of dialed characters is performed in response to said initiation delay signal.  13. The method according to item 12, in which the step of generating an initiation delay signal comprises the steps of: setting said initiation delay signal to a first logical value, when said radio communication device requests a first or second communication system, setting the initiation delay signal to a second logical value, when the radio communication device has captured the aforementioned first or second radio communication system.  14. The method of claims 8 to 13, wherein said first and second signaling messages are registration messages.  15. A mobile communication device installed to monitor signals from many different communication systems, to transmit a signaling message to one of the communication systems when said device is connected to said communication system, and to communicate with another communication system only if there is no said first communication system from message acknowledgment of the alarm message.