Synchronization in a communications system with multicarrier telephony transport
First Claim
1. In a communications system for transmitting payload messages between a central head end and a plurality of remote units over a plurality of coherent carriers within messages each having a sequence of frames, a method for decreasing peak decoding load at said head end, comprising:
- formatting at least first and second ones of said messages as first and second sequences of frames in first and second ones of said remote units, wherein each of the first and second sequences of frames includes at least one check-symbol frame;
transmitting said first message over a first of said carriers from said first remote unit to said head end beginning at a first time;
transmitting said second message over a second of said carriers from said second remote unit to said head end beginning at a second time, wherein the first and second sequences of frames arrive at the head end such that the at least one check-symbol frame of the first sequence of frames is not aligned with the at least one check-symbol frame of the second sequence of frames;
decoding said first message at a third time in a processor located in said head end; and
decoding said second message at a fourth time in the same processor in said head end.
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Accused Products
Abstract
A method of staggering the arrival of frames of data at a head end in a communication system. The method includes receiving at a first service unit upstream telephony data is described. The telephony data includes a first payload message. The method includes receiving at a second service unit upstream telephony data, wherein the telephony data includes a second payload message. The method further includes formatting the first payload message at the first service unit as a first sequence of frames and formatting the second payload message at the second service unit as a second sequence of frames. In addition, the method includes transmitting the first sequence of frames on a first carrier so as to arrive at the head end at a first time and transmitting the second sequence of frames on a second carrier so as to arrive at the head end at a second time.
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Citations
24 Claims
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1. In a communications system for transmitting payload messages between a central head end and a plurality of remote units over a plurality of coherent carriers within messages each having a sequence of frames, a method for decreasing peak decoding load at said head end, comprising:
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formatting at least first and second ones of said messages as first and second sequences of frames in first and second ones of said remote units, wherein each of the first and second sequences of frames includes at least one check-symbol frame;
transmitting said first message over a first of said carriers from said first remote unit to said head end beginning at a first time;
transmitting said second message over a second of said carriers from said second remote unit to said head end beginning at a second time, wherein the first and second sequences of frames arrive at the head end such that the at least one check-symbol frame of the first sequence of frames is not aligned with the at least one check-symbol frame of the second sequence of frames;
decoding said first message at a third time in a processor located in said head end; and
decoding said second message at a fourth time in the same processor in said head end. - View Dependent Claims (2, 3, 4)
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5. A method of staggering the arrival of frames of data at a head end in a communication system, the method comprising:
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receiving at a first service unit upstream telephony data, wherein the telephony data includes a first payload message;
receiving at a second service unit upstream telephony data, wherein the telephony data includes a second payload message;
formatting the first payload message at the first service unit as a first sequence of frames that includes at least one check-symbol frame;
formatting the second payload message at the second service unit as a second sequence of frames that includes at least one check-symbol frame;
transmitting the first sequence of frames on a first carrier so as to arrive at the head end at a first time; and
transmitting the second sequence of frames on a second carrier so as to arrive at the head end at a second time, wherein the first and second sequences of frames arrive at the head end such that the at least one check-symbol frame of the first sequence of frames is not aligned with the at least one check-symbol frame of the second sequence of frames. - View Dependent Claims (6, 7, 8, 9)
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10. A method of staggering the arrival of frames of data at a head end in a communication system, the method comprising:
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receiving at a first service unit upstream telephony data, wherein the telephony data includes a first payload message;
receiving at a second service unit upstream telephony data, wherein the telephony data includes a second payload message;
formatting the first payload message at the first service unit as a first sequence of frames that includes at least one check-symbol frame;
formatting the second payload message at the second service unit as a second sequence of frames that includes at least one check-symbol frame;
transmitting the first sequence of frames on a first carrier so as to arrive at the head end at a first time;
transmitting the second sequence of frames on a second carrier so as to arrive at the head end at a second time, wherein the first and second sequences of frames arrive at the head end such that the at least one check-symbol frame of the first sequence of frames is not aligned with the at least one check-symbol frame of the second sequence of frames; and
decoding, at the head end, the first sequence of frames at a third time and the second sequence of frames at a fourth time. - View Dependent Claims (11, 12, 13, 14)
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15. A communication system, comprising:
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a head end terminal;
a plurality of service units;
a distribution network having a plurality of coherent carriers coupled between the head end terminal and the plurality of service units;
wherein a first service unit of the plurality of service units receives a plurality of messages, formats a payload message of one of the plurality of messages as a first sequence of frames that includes at least one check-symbol frame, and transmits the first sequence of frames on a first carrier to the head end terminal at a first time; and
wherein a second service unit of the plurality of service units receives a plurality of messages, formats a payload message of one of the plurality of messages as a second sequence of frames that includes at least one check-symbol frame, and transmits the second sequence of frames on a second carrier to the head end terminal at a second time, wherein the first and second sequences of frames arrive at the head end such that the at least one check-symbol frame of the first sequence of frames is not aligned with the at least one check-symbol frame of the second sequence of frames. - View Dependent Claims (16, 17, 18, 19)
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20. A communication system, comprising:
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a head end terminal;
a plurality of service units;
a distribution network having a plurality of coherent carriers coupled between the head end terminal and the plurality of service units;
wherein a first service unit of the plurality of service units receives a plurality of messages, formats a payload message of one of the plurality of messages as a first sequence of frames that includes at least one check-symbol frame, and transmits the first sequence of frames on a first carrier to the head end terminal at a first time;
wherein a second service unit of the plurality of service units receives a plurality of messages, formats a payload message of one of the plurality of messages as a second sequence of frames that includes at least one check-symbol frame, and transmits the second sequence of frames on a second carrier to the head end terminal at a second time, wherein the first and second sequences of frames arrive at the head end such that the at least one check-symbol frame of the first sequence of frames is not aligned with the at least one check-symbol frame of the second sequence of frames; and
wherein the head end terminal includes a processor that decodes the first and second sequence of frames. - View Dependent Claims (21, 22, 23, 24)
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Specification