System and method for transporting information over a communication channel
First Claim
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1. An improved system for communicating over a digital subscriber line, comprising:
- means for forming a data frame, said data frame comprising;
a frame header;
a frame trailer;
a first frame delimiter that indicates the start of said data frame;
a second frame delimiter that indicates the end of said data frame, said first and second frame delimiters encompassing a plurality of fields; and
a payload comprising a four-octet payload header and user data, said four-octet payload header comprising the first four octets of a five octet Asynchronous Transfer Mode (ATM) header, said frame header comprising a field that indicates that said payload includes a four-octet payload header followed by user data; and
means for transmitting said data frame over said digital subscriber line.
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Abstract
An improved system and method for transporting ATM information over a communications channel by enabling a single 4-octet ATM header to be prepended to user data, thus forming a low overhead ATM cell. Furthermore, an alternative embodiment of the invention may be used to simultaneously transport a plurality of 52 octet ATM frames in conjunction with the low overhead cells.
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Citations
16 Claims
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1. An improved system for communicating over a digital subscriber line, comprising:
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means for forming a data frame, said data frame comprising;
a frame header;
a frame trailer;
a first frame delimiter that indicates the start of said data frame;
a second frame delimiter that indicates the end of said data frame, said first and second frame delimiters encompassing a plurality of fields; and
a payload comprising a four-octet payload header and user data, said four-octet payload header comprising the first four octets of a five octet Asynchronous Transfer Mode (ATM) header, said frame header comprising a field that indicates that said payload includes a four-octet payload header followed by user data; and
means for transmitting said data frame over said digital subscriber line. - View Dependent Claims (2, 3, 4, 5)
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6. An improved method for communicating over a digital subscriber line, comprising the steps of:
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forming a data frame, said data frame comprising;
a frame header;
a frame trailer;
a first frame delimiter that indicates the start of said data frame;
a second frame delimiter that indicates the end of said data frame, said first and second frame delimiters encompassing a plurality of fields; and
a payload comprising a four-octet payload header and user data, said four-octet payload header comprising the first four octets of a five octet Asynchronous Transfer Mode (ATM) header, said frame header comprising a field that indicates that said payload includes a four-octet payload header followed by user data; and
transmitting said data frame over said digital subscriber line. - View Dependent Claims (7, 8, 9, 10)
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11. An improved system for communicating over a digital subscriber line, comprising:
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means for forming a data frame, said data frame comprising;
a frame header;
a frame trailer;
a plurality of frame delimiters; and
a payload comprising at least one 52-octet ATM cell, said 52-octet ATM cell consisting of a 53-octet ATM cell with the header error control (HEC) octet removed, said frame header comprising a field that indicates that said payload includes at least one 52-octet ATM cell; and
means for transmitting said data frame over said digital subscriber line. - View Dependent Claims (12, 13)
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14. An improved method for communicating over a digital subscriber line, the method comprising the steps of:
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forming a data frame, said step of forming a data frame comprising the steps of;
forming a frame header;
forming a frame trailer;
forming a plurality of frame delimiters; and
forming a payload comprising at least one 52-octet ATM cell, said 52-octet ATM cell consisting of a 53-octet ATM cell with the HEC octet removed, said frame header comprising a field that indicates that said payload includes at least one 52-octet ATM cell; and
transmitting said data frame over said digital subscriber line. - View Dependent Claims (15, 16)
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Specification