Method and system for downstream time stamp in an adaptive...

Details Method and system for downstream time stamp in an adaptive... Method and system for downstream time stamp in an adaptive...

2011-08-02

2011-08-02

Lonsberry, Hunter B (Department: 2421)

Interactive video distribution systems

Satellite video distribution system

C370S324000, C375S359000

Reexamination Certificate

active

07992174

ABSTRACT:
Provided are a method and system for determining system time in a satellite based cable data communication system. The system includes a satellite modem termination system configured to transmit data frames to a receiver in a predetermined symbol rate. Each frame includes a corresponding number of symbols and has a time stamp (i) indicative of the frame's time of transmission and (ii) positioned within the frame at a location common to all of the frames. The method includes receiving at least two consecutively transmitted data frames within the receiver and registering the time stamp of the first received data frame within the receiver to produce a first time stamp. Also, the time stamp of the second received data frame is registered within the receiver to produce a second time stamp. The time of transmission of the second transmitted data frame is updated, wherein the updating is a function of the first time stamp, the second time stamp, the corresponding number of symbols, and the symbol rate.

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