| 摘要 |
<p>A telephone network provides a system which overcomes the problems with roaming charges and loss of service encountered by users by providing an alternate data message path through Low Earth Orbit (LEO) satellite networks such as Iridum Satellite or Globalstar, or through geosynchronous satellite networks such as Terrestar or Inmarsat. The system includes a cellular telephone handset enhancement to include specific satellite network communication capabilities that work in unison with a novel message routing system to handle the multiple message transport paths available for use by the cellular telephone. Each field user device includes a message exchange delivery algorithm which operates to set the delivery route of messages to select either the cellular telephone network or the satellite network.</p> |
