Apparatus and method for switching broadcast channel using VCC information
First Claim
1. An apparatus for classifying digital broadcast channel data according to virtual channel connection (VCC), comprising:
- an optical signal receiver for converting an optical signal from an optical line terminal (OLT) into an ATM (Asynchronous Transfer Mode) cell that is classified according to the VCC;
a VCC-based ATM cell classifier for detecting header information and a payload part from the classified ATM cell of each VCC delivered from the optical signal receiver;
a controller;
a plurality of PID (Program ID) analyzers for receiving respective payload parts of an ATM cell corresponding to one VCC from the VCC-based ATM cell classifier, extracting PID of each broadcast channel from digital broadcast channel data included in the payload part, and outputting broadcast channel data in the broadcast channel data included in the payload part under the control of the controller; and
a switch for receiving broadcast channel data output from the PID analyzers and switching the received broadcast channel data to a broadcast channel desired by a subscriber under the control of the controller,wherein the controller updates broadcast channel information by receiving header information of the classified ATM cell of each VCC front the VCC-based ATM cell classifier, receives the broadcast channel desired by the subscriber, and controls the PID analyzers to output the desired broadcast channel according to VCC information with the desired broadcast channel included therein so that the output broadcast channel is matched to the subscriber.
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Accused Products
Abstract
An optical transmission network is disclosed that classifies digital broadcast channel data according to virtual channel connection (VCC) before transmission. In the optical transmission network, an optical signal receiver converts an optical signal from an optical line terminal (OLT) into an ATM cell that is classified according to the VCC. A VCC-based ATM cell classifier detects header information and a payload part from the classified ATM cell of each VCC. PID analyzers receive a payload part of an ATM cell corresponding to one VCC from the VCC-based ATM cell classifier, extract PID of each broadcast channel from digital broadcast channel data included in the payload part, and output specific broadcast channel data in the broadcast channel data included in the payload part. A switch receives broadcast channel data output from the PID analyzers and switches the received broadcast channel data to a broadcast channel desired by each subscriber. The controller updates broadcast channel information by receiving header information of the classified ATM cell of each VCC from the VCC-based ATM cell classifier, receives the broadcast channel desired by the subscriber, and controls the PID analyzers to output the desired broadcast channel according to VCC information with the desired broadcast channel included therein so that the output broadcast channel is matched to the subscriber.
19 Citations
9 Claims
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1. An apparatus for classifying digital broadcast channel data according to virtual channel connection (VCC), comprising:
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an optical signal receiver for converting an optical signal from an optical line terminal (OLT) into an ATM (Asynchronous Transfer Mode) cell that is classified according to the VCC; a VCC-based ATM cell classifier for detecting header information and a payload part from the classified ATM cell of each VCC delivered from the optical signal receiver; a controller; a plurality of PID (Program ID) analyzers for receiving respective payload parts of an ATM cell corresponding to one VCC from the VCC-based ATM cell classifier, extracting PID of each broadcast channel from digital broadcast channel data included in the payload part, and outputting broadcast channel data in the broadcast channel data included in the payload part under the control of the controller; and a switch for receiving broadcast channel data output from the PID analyzers and switching the received broadcast channel data to a broadcast channel desired by a subscriber under the control of the controller, wherein the controller updates broadcast channel information by receiving header information of the classified ATM cell of each VCC front the VCC-based ATM cell classifier, receives the broadcast channel desired by the subscriber, and controls the PID analyzers to output the desired broadcast channel according to VCC information with the desired broadcast channel included therein so that the output broadcast channel is matched to the subscriber. - View Dependent Claims (2, 3)
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4. A digital broadcast channel switching method that classifies digital broadcast channel data according to virtual channel connection (VCC), comprising the steps of:
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(a) converting an optical signal provided from an optical line terminal (OLT) into an ATM cell that is classified according the VCC; (b) updating broadcast channel information of each VCC from a header in the classified ATM cell of each VCC; (c) storing a payload part of the classified ATM cell of each VCC, and extracting PID (Program ID) of broadcast channels included in the payload part from the stored payload part; (d) receiving a broadcast channel desired by a subscriber, and searching information on VCC with the desired broadcast channel included therein from the updated broadcast channel information of each VCC; (e) sending information on the desired broadcast channel to a storage device corresponding to the VCC information among storages where the payload part is stored according to VCC in the step (c), based on the searched VCC information so as to output only desired broadcast channel data; and (f) switching the broadcast channel data output in step (e) so that the broadcast channel data is delivered to the subscriber. - View Dependent Claims (5, 6)
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7. A computer-readable medium comprising executable code to classify digital broadcast channel data according to virtual channel connection (VCC), the code when loaded in a processor causes the processor to:
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update broadcast channel information of each VCC from a header in an ATM cell that is classified according the VCC; store a payload part of the classified ATM cell of each VCC, and extracting PID (Program ID) of broadcast channels included in the payload part from the stored payload part; receive a broadcast channel desired by a subscriber, and searching information on VCC with the desired broadcast channel included therein from the updated broadcast channel information of each VCC; send information on the desired broadcast channel to a storage device corresponding to the VCC information among storages where the payload part is stored according to VCC, based on the searched VCC information so as to output only desired broadcast channel data; and switch the output broadcast channel data so that the broadcast channel data is delivered to the subscriber. - View Dependent Claims (8, 9)
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Specification