发明名称 |
Method for implementing ciphered communication for single-hop terminal-to-terminal calls in a mobile satellite system |
摘要 |
A mobile satellite communication system is provided to control the transfer of a terminal for a single-hop call from at least one of a clear mode and a ciphered mode with respect to a gateway station to a ciphered mode with respect to a satellite link connecting the terminal with another terminal for a single-hop, terminal-to-terminal call using a cipher key and an encryption algorithm common to the terminal and the other terminal. Frame number offset data, which indicates a mapping delay between received and transmitted time slots at the satellite, is provided to both terminals in a terminal-to-terminal call for ciphering synchronization.
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申请公布号 |
US6516065(B1) |
申请公布日期 |
2003.02.04 |
申请号 |
US19990247848 |
申请日期 |
1999.02.11 |
申请人 |
HUGHES ELECTRONICS CORPORATION |
发明人 |
JOSHI CHANDRA;NOERPEL ANTHONY;SU CHI-JIUN |
分类号 |
H04B7/185;H04L9/18;(IPC1-7):H04K1/00 |
主分类号 |
H04B7/185 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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