Multiplex communications – Data flow congestion prevention or control – Flow control of data transmission through a network
Reexamination Certificate
2011-08-02
2011-08-02
Vu, Thong (Department: 2471)
Multiplex communications
Data flow congestion prevention or control
Flow control of data transmission through a network
C370S517000
Reexamination Certificate
active
07990874
ABSTRACT:
A method of receiving data packets asynchronously transmitted by a plurality of user terminals using a spread-spectrum medium access protocol, comprises a step of cancelling interferences between colliding packets according to an innovative “sliding window” processing algorithm. A gateway receiver is adapted for carrying out interference cancellation using this algorithm. Asynchronous packet transmission from a user terminal is controlled by estimating a parameter indicative of the quality of information transmission through a communication channel; and inhibiting or allowing data transmission depending on a comparison between said estimated parameter and an adaptively varying threshold. A user terminal comprises transmission control means adapted for carrying out such a method. A communication system comprises a plurality of mobile user terminal communicating with a gateway through a satellite channel using an asynchronous spread-spectrum medium access protocol without closed-loop power control, wherein the user terminals and said gateway are of the kind described above.
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De Gaudenzi Riccardo
del Rio Herrero Oscar
Agence Spatiale Europeenne
Alston & Bird LLP
Vu Thong
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