Back to results
US 6,650,868 B1Granted
Mobile satellite phone system incorporating symmetrical and non-symmetrical waveform modes
AssigneeEricsson Inc.
InventorPeter D. Karabinis
Life of this patent
Estimating the term…
Abstract
An improved multi-mode telephone for use in an improved satellite communication method and system. The telephone is selectively capable of receiving signals at different carrier bandwidths, such that a satellite communication system having a non-symmetrical air interface can be easily implemented without requiring rate conversion hardware or software at the satellite for direct mobile-to-mobile communications.
Claims13
A satellite communications system, comprising:
- a satellite;
- and
- a plurality of mobile communication devices, wherein
- the system operates in a first mode, in which each device transmits signals to the satellite at a first carrier bandwidth and receives signals from the satellite at a second carrier bandwidth, and selectively operates in a second mode, in which each device transmits signals to the satellite and receives signals from the satellite at the first carrier bandwidth.
1 more element
A method for exchanging communication signals in a communication system, comprising the steps of:
- establishing, in a first mode of operation, a first communication link between a first communication device, a satellite, a control station associated with the satellite, and a second communication device, the first communication device transmitting signals to the satellite at a first carrier bandwidth and the second communication device receiving signals at a second carrier bandwidth;
- establishing, in a second mode of operation, a second communication link between the first communication device, the satellite, and a second communication device, the first communication device transmitting signals to the satellite at the first carrier bandwidth and the second communication device receiving signals from the satellite at the first carrier bandwidth.
Dependencies are inferred from the claim text.