Pulse or digital communications – Spread spectrum – Frequency hopping
Reexamination Certificate
2006-08-01
2006-08-01
Patel, Jay K. (Department: 2631)
Pulse or digital communications
Spread spectrum
Frequency hopping
C375S133000, C370S431000, C370S436000, C370S341000, C370S329000
Reexamination Certificate
active
07085306
ABSTRACT:
System and method for providing a multi-frequency upstream transmission channel to a network device. When a headend network entity generates an upstream channel descriptor message, the descriptor message includes at least two upstream frequencies available for upstream transmission, and a frequency hopping descriptor with a frequency-hopping pattern associated with the available frequencies for determining an upstream frequency for upstream transmission. The headend provides a timing reference for determining upstream transmission periods on the frequencies available on the network device. When the headend receives upstream transmission on one of the available upstream frequencies, the headend network entity determines frequency distortions. If the distortions exceed a threshold level, the headend may send a new upstream channel descriptor message that excludes the upstream frequency associated with the high frequency distortions, add a new upstream frequency, or defines a new frequency-hopping pattern.
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Akgun Ali
Budinger Dan
Fijolek John G.
Kelkar Kris
Vogel Mark O.
3Com Corporation
McDonnell & Boehnen Hulbert & Berghoff
Patel Jay K.
Torres Juan Alberto
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