ATM multiplexing apparatus, ATM demultiplexing apparatus, and communication network with the apparatus
First Claim
1. An ATM demultiplexing apparatus for receiving a multiplexed ATM cell stream, converting said multiplexed ATM cell stream to a multiplexed signal having a second rate, and outputting said multiplexed signal, said ATM demultiplexing apparatus comprising:
- an ATM cell disassembler which converts each ATM cell to a signal having a first rate and takes out each of said plurality of signals and a time stamp;
a memory which stores the signal and the time stamp supplied from said cell disassembler; and
a multiplexing controller which conducts multiplexing processing on said plurality of signals so as to correspond to a signal kind and generates multiplexing control signals from said time stamp stored in said memory, adjusts a signal readout rate, and inserts a part of said multiplexing control signals and said plurality of signals in predetermined positions in a frame of said multiplexed signal,wherein a multiplexed signal obtained by multiplexing a plurality of signals read out from said memory is outputted, andwherein said multiplexing controller comprises;
a table which stores beforehand a plurality of patterns of said multiplexing control signals to be inserted in said multiplexed signal,a time stamp controller which generates a reference signal from the received time stamp and a clock of an ATM network, anda pattern controller which selects one out of the patterns stored in the table on the basis of the reference signal and thereby adjusting a readout rate of a memory,wherein the selected pattern and a plurality of signals are inserted in a frame of the multiplexed signal, and thereby synchronizing of each of a plurality of signals between a source node and destination node is assured.
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Accused Products
Abstract
An ATM multiplexing apparatus receives a multiplexed signal obtained by multiplexing a plurality of signals, converts each of a plurality of signals to a predetermined ATM cell according to a kind of the signal, then multiplexes these ATM cells, and outputs the multiplexed ATM cells. The ATM multiplexing apparatus includes a discriminator for discriminating each of a plurality of signals on the multiplexed signal, and a cell multiplexing apparatus for converting each of a plurality of signals on the multiplexed signal directly to a predetermined ATM cell on the basis of the output of the discriminator and outputs a stream of multiplexed ATM cells. On the other hand, an ATM demultiplexing apparatus receives a multiplexed stream of ATM cells, converts each ATM cell to a signal, then conducts multiplexing processing on the signals so as to correspond to a signal kind, converts the signals to a multiplexed signal, and outputs the multiplexed signal. The ATM demultiplexing apparatus includes an ATM cell disassembler for taking out each of a plurality of signals and a time stamp, and a signal multiplexer for converting a plurality of signals supplied from the ATM cell disassembler directly to a multiplexed signal on the basis of the time stamp and outputs the multiplexed signal.
31 Citations
2 Claims
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1. An ATM demultiplexing apparatus for receiving a multiplexed ATM cell stream, converting said multiplexed ATM cell stream to a multiplexed signal having a second rate, and outputting said multiplexed signal, said ATM demultiplexing apparatus comprising:
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an ATM cell disassembler which converts each ATM cell to a signal having a first rate and takes out each of said plurality of signals and a time stamp; a memory which stores the signal and the time stamp supplied from said cell disassembler; and a multiplexing controller which conducts multiplexing processing on said plurality of signals so as to correspond to a signal kind and generates multiplexing control signals from said time stamp stored in said memory, adjusts a signal readout rate, and inserts a part of said multiplexing control signals and said plurality of signals in predetermined positions in a frame of said multiplexed signal, wherein a multiplexed signal obtained by multiplexing a plurality of signals read out from said memory is outputted, and wherein said multiplexing controller comprises; a table which stores beforehand a plurality of patterns of said multiplexing control signals to be inserted in said multiplexed signal, a time stamp controller which generates a reference signal from the received time stamp and a clock of an ATM network, and a pattern controller which selects one out of the patterns stored in the table on the basis of the reference signal and thereby adjusting a readout rate of a memory, wherein the selected pattern and a plurality of signals are inserted in a frame of the multiplexed signal, and thereby synchronizing of each of a plurality of signals between a source node and destination node is assured. - View Dependent Claims (2)
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Specification