Freescale Semiconductor,inc.

Adtran Gmbh

Ronald Marc Zuckerman

Charles E Polk, Jr

Patrick J Quirk

Lee T Gusler, Jr

Joe L Wilson, Jr

Daniel Josiah Barnes

Chad Anthony Dieselberg

Embodiments of the present disclosure generally pertain to systems and methods for controlling multicast bandwidth. A communication system in accordance with an exemplary embodiment of the present disclosure comprises a network access device (NAD) having bandwidth (BW) expansion logic. The BW expansion logic is configured to automatically calculate the expansion ratio for a multicast stream based on various network parameters, such as layer 1 and 2 information, network packet size, and network transmission rate. Based on the expansion ratio, the BW expansion logic determines the actual transmission rate for transmitting the multicast stream across a subscriber link. The NAD then accepts or rejects join requests based on whether the sum of the current allocated link rate and the actual transmission rate exceed a rate threshold for the link.

Systems and methods for detecting and controlling multicast bandwidth

The apparatus and method herein splits the function of a digital subscriber line (DSL) modem data pump between a digital signal processor (DSP) and a general purpose host central processing unit (CPU). The DSP () handles all front end data pump processing such as interface to an analog front end (and), FFT processing, FEQ processing, QAM decoding, and bit formatting. The host CPU () handles all back end data pump processing such as DMT tone deordering, data deinterleaving, error detection and correcting, bit descrambling, CRC processing, and the like. In order to enable the DSP () and the CPU () to communicate with each other effectively, buffers () under the control of specialized buffer management methodology (FIG.) are used.

Discrete multi-tone (DMT) system and method that communicates a data pump data stream between a general purpose CPU and a DSP via a buffering scheme

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Madison, AL, United States of America

Ronald Marc Zuckerman