Adaptive coding and modulation using linked list data structures
First Claim
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1. A method of implementing adaptive coding and modulation using a linked list, the method comprising:
- associating a signal quality with each of a plurality of packets, the signal quality comprising a representative signal quality of a communication link to which the respective packet is destined;
assigning a different modcode to each of a plurality of signal quality ranges;
inserting, in a linked list, a plurality of elements each associated with one of the plurality of packets;
iterating through the linked list to identify a first subset of elements from the plurality of elements, the first subset of elements each associated with communication links in a first signal quality range of the plurality of ranges; and
transmitting a first subset of the plurality of packets, associated with the first subset of elements, in an order corresponding to a sequence in which their associated elements are identified, the transmission according to a first modcode assigned to the first signal quality range.
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Abstract
A process is described to build physical layer frames with a modcode adapted to the signal quality of a destination terminal. Data packets assigned to the same modcode may be sent in the same frame, although packets associated with higher modcodes may be used to complete a frame before switching to the applicable higher modcode for construction of subsequent frames. After an interval, the order of progression is restarted with an out of order packet above a threshold age. Flow control filtering mechanisms and a variable reliability margin may be used to adapt dynamically to the current data traffic conditions.
59 Citations
30 Claims
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1. A method of implementing adaptive coding and modulation using a linked list, the method comprising:
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associating a signal quality with each of a plurality of packets, the signal quality comprising a representative signal quality of a communication link to which the respective packet is destined; assigning a different modcode to each of a plurality of signal quality ranges; inserting, in a linked list, a plurality of elements each associated with one of the plurality of packets; iterating through the linked list to identify a first subset of elements from the plurality of elements, the first subset of elements each associated with communication links in a first signal quality range of the plurality of ranges; and transmitting a first subset of the plurality of packets, associated with the first subset of elements, in an order corresponding to a sequence in which their associated elements are identified, the transmission according to a first modcode assigned to the first signal quality range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A device for implementing adaptive coding and modulation using a linked list, the device comprising:
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a memory storing a linked list including a plurality of elements each associated with one of a plurality of packets and a signal quality, each signal quality comprising a representative signal quality of a communication link to which each respective packet is destined; and a processor, communicatively coupled with the memory, and configured to; assign a different modcode to each of a plurality of signal quality ranges; iterate through the linked list to identify a first subset of elements from the plurality of elements, the first subset of elements each associated with communication links in a first signal quality range of the plurality of ranges; and a transmitter, communicatively coupled with the processor, and configured to transmit a first subset of the plurality of packets, associated with the first subset of elements, in an order corresponding to a sequence in which their associated elements are identified, and according to a first modcode assigned to the first signal quality range. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A device for implementing adaptive coding and modulation using a linked list by assigning different modcodes for communication links of different signal qualities, the device comprising:
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means for associating a signal quality with each of a plurality of packets, the signal quality comprising a representative signal quality of a communication link to which the respective packet is destined; means for assigning a different modcode to each of a plurality of signal quality ranges; means for inserting, into a linked list, a plurality of elements each associated with one of plurality of packets; means for iterating through the linked list to identify a first subset of elements from the plurality of elements, the first subset of elements each associated with communication links in a first signal quality range of the plurality of ranges; and means for transmitting a first subset of the plurality of packets, associated with the first subset of elements, in an order corresponding to a sequence in which their associated elements were identified and according to the first modcode assigned to the first signal quality range.
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Specification