Patent ID: 6763032
Filing Date: 2004-07-13
Classification: H04J,H04L

Abstract:
A method for communicating information, the method comprising:allocating a time slot in a time division multiple access system for a transmission from a subscriber to a headend the time slot being sufficient for only a first portion of a transmission, a second portion of the transmission being transmitted in other than the first time slot; enhancing synchronization a clock of the subscriber with respect to a clock of the headend using a message transmitted from the headend to the subscriber which is indicative of an error in a subscriber transmission time with respect to the time slot; using a feedback loop process to determine at least one of fractional symbol timing correction and carrier phase correction of a transmission from the subscriber to the headend; monitoring quality of at least one channel and changing modulation in response to changes to monitored channel quality; using information representative of parameters of received time division multiple access data to facilitate processing of the received time division multiple access data in a receiver, the parameters being communicated within the headend; generating filter coefficients at the headend from a ranging signal transmitted from the subscriber to the headend and transmitting the filter coefficients from the headend to the subscriber, the filter coefficients being used by the subscriber to compensate for noise in a transmission from the subscriber to the headend; and processing sampled packets from a packet sender for transmission over a transmission system having a periodically allocated bandwidth to a packet recipient by: determining unsolicited grant arrivals in response to a request from the packet sender; synchronizing the storing of sampled packets with the unsolicited grant arrivals; and transmitting, upon receipt of an unsolicited grant arrival, currently stored sampled packets for further transmission to the packet recipient over the transmission system having a periodically allocated bandwidth.