| 摘要 |
A system and a method for address assignments for wireless satellite telephone systems comprises one or more desksets (telephones) (128a, 128b, ... 128n; 328a, 328b,...328n) and a radio antenna unit (RAU) (124). The desksets (328a, 328b,...328n) are connected to the RAU (124) using an interface bus (204). In operation, a deskset initiates an address arbitration cycle by transmitting a request for an address to the RAU (124). The RAU (124) acknowledges after it receives the request, and queries other desksets (328a, 328b,...328n) if the requested address is being used by other desksets. If no other deskset (328a, 328b,...328n) responds within a predetermined time period, the RAU (124) grants the requesting deskset the address. If the requested address is being used, the deskset using the address informs the RAU (124), and the RAU rejects the request. The requesting deskset then requests a different address. If all available addresses are being used, the requesting deskset informs the user and shuts down. If two or more desksets (328a, 328b,...328n) transmit requests concurrently, there will be a collision. To resolve a collision, the desksets (328a, 328b,...328n) are divided into two sets. Deskset with a 0 in the least significant bit (LSB) of their electronic serial number (ESN) will be in a first, and the desksets with a 1 in the LSB of their ESN will be in the second set. The desksets in the first set transmit after 100 ms. The deskset in the second set transmit after an additional 10 ms (110 ms total).
|
