Inroute training in a two-way satellite system
AssigneeHughes Network Systems, LLC
InventorDavid Kloper
Life of this patent
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Abstract
An approach for ranging in a radio frequency communications system is disclosed. A transmission channel class that includes at least one of transmission rate, modulation scheme, coding scheme, and transponder footprint is selected by a terminal. The terminal transmits a ranging message according to the selected transmission channel class over a channel. The transmission channel class is selectively modified based upon characteristics of the channel. Accordingly, an optimal transmission channel class is determined for a particular terminal. The above approach has particular applicability to a two-way satellite communications system.
Claims42
A method for ranging in a radio frequency communications system, the method comprising:
- selecting a transmission channel class that includes at least one of transmission rate, modulation scheme, coding scheme, and transponder footprint;
- transmitting a ranging message according to the selected transmission channel class over a channel;
- and
- selectively modifying the transmission channel class based upon characteristics of the channel.
A terminal apparatus for supporting ranging over a radio frequency communications system, the apparatus comprising:
- a transmit unit that is configured to transmit a ranging message according to a selected transmission channel class that includes at least one of transmission rate, modulation scheme, coding scheme, and transponder footprint over a channel;
- and
- means for selectively modifying the transmission channel class based upon characteristics of the channel.
A computer-readable medium carrying one or more sequences of one or more instructions for ranging in a radio frequency communications system, the one or more sequences of one or more instructions including instructions which, when executed by one or more processors, cause the one or more processors to perform the steps of:
- selecting a transmission channel class that includes at least one of transmission rate, modulation scheme, coding scheme, and transponder footprint;
- initiating transmission of a ranging message according to the selected transmission channel class over a channel;
- and
- selectively modifying the transmission channel class based upon characteristics of the channel.
A method for ranging in a radio frequency communications system, the method comprising:
- receiving a ranging message from a terminal over a channel associated with a transmission channel class that includes at least one of transmission rate, modulation scheme, coding scheme, and transponder footprint;
- performing ranging measurements corresponding to the message;
- and
- outputting a ranging response message based upon the ranging measurements, the ranging response being transmitted to the terminal, wherein the terminal selectively modifies the transmission channel class based upon the ranging response.
A computer-readable medium carrying one or more sequences of one or more instructions for ranging in a radio frequency communications system, the one or more sequences of one or more instructions including instructions which, when executed by one or more processors, cause the one or more processors to perform the steps of:
- performing ranging measurements corresponding to a ranging message received from a terminal over a channel associated with a transmission channel class that includes at least one of transmission rate, modulation scheme, coding scheme, and transponder footprint;
- and
- outputting a ranging response message based upon the ranging measurements, the ranging response being transmitted to the terminal, wherein the terminal selectively modifies the transmission channel class based upon the ranging response.
A satellite communications system comprising:
- a terminal configured to perform ranging to determine a target transmission rate among a plurality of transmission rates by transmitting a ranging message over a satellite;
- and
- a hub configured to receive the ranging message and to perform ranging measurements corresponding to the message, the hub outputting a ranging response message that includes ranging parameters, the ranging response being transmitted to the terminal, wherein the terminal adapts the target transmission rate based upon the ranging response.
Dependencies are inferred from the claim text.