RE-ACQUISITION OF SYMBOL INDEX IN THE PRESENCE OF SLEEP TIMER ERRORS FOR MEDIAFLO SYSTEMS
First Claim
1. A method for re-acquiring a symbol index in a presence of sleep timer errors in a MediaFLO™
- (Forward Link Only) mobile multimedia multicast system, said method comprising;
receiving a digital signal comprising a superframe comprising a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols in a receiver that is in a sleep mode of operation, wherein said receiver comprises a timer;
waking up said receiver from said sleep mode of operation by an amount of time equal to a maximum error introduced by said timer plus a time to reacquire a beginning of each OFDM symbol plus a time to reacquire a symbol index; and
reacquiring said symbol index.
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Abstract
A technique for re-acquiring a symbol index in the presence of sleep timer errors in a MediaFLO™ (Forward Link Only) mobile multimedia multicast system comprising a receiver and a transmitter, wherein the method comprises receiving a digital signal comprising a superframe comprising one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols in the receiver comprising a timer; waking up the receiver from a sleep mode of operation by an amount of time equal to a maximum error introduced by the timer plus a time to reacquire a beginning of each OFDM symbol plus a time to reacquire a symbol index; and reacquiring the symbol index.
4 Citations
20 Claims
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1. A method for re-acquiring a symbol index in a presence of sleep timer errors in a MediaFLO™
- (Forward Link Only) mobile multimedia multicast system, said method comprising;
receiving a digital signal comprising a superframe comprising a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols in a receiver that is in a sleep mode of operation, wherein said receiver comprises a timer; waking up said receiver from said sleep mode of operation by an amount of time equal to a maximum error introduced by said timer plus a time to reacquire a beginning of each OFDM symbol plus a time to reacquire a symbol index; and reacquiring said symbol index. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- (Forward Link Only) mobile multimedia multicast system, said method comprising;
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9. An apparatus for re-acquiring a symbol index in a presence of sleep timer errors in a MediaFLO™
- (Forward Link Only) mobile multimedia multicast system, said apparatus comprising;
a receiver that is in a sleep mode of operation and adapted to receive a digital signal comprising a superframe comprising a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols, wherein said receiver comprises a timer; a processor adapted to (i) wake up said receiver from said sleep mode of operation by an amount of time equal to a maximum error introduced by said timer plus a time to reacquire a beginning of each OFDM symbol plus a time to reacquire a symbol index; and
(ii) reacquire said symbol index. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
- (Forward Link Only) mobile multimedia multicast system, said apparatus comprising;
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17. A program storage device readable by computer, tangibly embodying a program of instructions executable by said computer to perform a method for re-acquiring a symbol index in a presence of sleep timer errors in a MediaFLO™
- (Forward Link Only) mobile multimedia multicast system, said method comprising;
receiving a digital signal comprising a superframe comprising a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols in a receiver that is in a sleep mode of operation, wherein said receiver comprises a timer; waking up said receiver from said sleep mode of operation by an amount of time equal to a maximum error introduced by said timer plus a time to reacquire a beginning of each OFDM symbol plus a time to reacquire a symbol index; and reacquiring said symbol index. - View Dependent Claims (18, 19, 20)
- (Forward Link Only) mobile multimedia multicast system, said method comprising;
Specification