Apparatus, method and computer program product for error correction in variably reliable and/or hierarchical networks
First Claim
1. A method comprising the steps of:
- multicasting a file from an error-correcting multicast apparatus to a plurality of endpoints comprising a first multicast group, over a network segmented into at least second and third multicast groups, said second and third multicast groups being subsets of said first multicast group, given ones of said endpoints being assigned to said second and third multicast groups based on likelihood of experiencing similar errors;
obtaining, at said error-correcting multicast apparatus, over said network, a retransmission request from a first one of said endpoints, based on at least one of loss and corruption of a portion of said file during said multicasting of said file to said first one of said endpoints; and
retransmitting said portion of said file, via multicasting, over said network, to one of said second and third multicast groups.
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Accused Products
Abstract
A file is multicast from an error-correcting multicast apparatus to a plurality of endpoints forming a first multicast group, over a network segmented into at least second and third multicast groups. The second and third multicast groups are subsets of the first multicast group. Given ones of the endpoints are assigned to the second and third multicast groups based on likelihood of experiencing similar errors. At the error-correcting multicast apparatus, over the network, a retransmission request is obtained from a first one of the endpoints, based on at least one of loss and corruption of a portion of the file during the multicasting of the file to the first one of the endpoints. The portion of the file is retransmitted, via multicasting, over the network, to one of the second and third multicast groups.
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Citations
30 Claims
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1. A method comprising the steps of:
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multicasting a file from an error-correcting multicast apparatus to a plurality of endpoints comprising a first multicast group, over a network segmented into at least second and third multicast groups, said second and third multicast groups being subsets of said first multicast group, given ones of said endpoints being assigned to said second and third multicast groups based on likelihood of experiencing similar errors; obtaining, at said error-correcting multicast apparatus, over said network, a retransmission request from a first one of said endpoints, based on at least one of loss and corruption of a portion of said file during said multicasting of said file to said first one of said endpoints; and retransmitting said portion of said file, via multicasting, over said network, to one of said second and third multicast groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method comprising the steps of:
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at one of a plurality of endpoints comprising a first multicast group, over a network segmented into at least second and third multicast groups, said second and third multicast groups being subsets of said first multicast group, given ones of said endpoints being assigned to said second and third multicast groups based on likelihood of experiencing similar errors, receiving a multicast of a file from an error-correcting multicast apparatus to said first multicast group; dispatching, to said error-correcting multicast apparatus, over said network, a retransmission request from said one of said endpoints, based on at least one of loss and corruption of a portion of said file during said multicasting of said file to said one of said endpoints; and receiving, at said one of said endpoints, a retransmission of said portion of said file, via multicasting, from said error-correcting multicast apparatus, over said network, to one of said second and third multicast groups. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. An error-correcting multicast apparatus comprising:
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a memory; at least one processor coupled to said memory; and a non-transitory persistent storage medium which contains instructions which, when loaded into said memory, configure said at least one processor to be operative to; segment a network into second and third multicast groups that are subsets of a first multicast group comprising a plurality of endpoints, given ones of said endpoints being assigned to one of said second and third multicast groups based on likelihood of experiencing similar errors, multicast a file from said error-correcting multicast apparatus over said network to said first multicast group; obtain, over said network, a retransmission request from a first one of said endpoints, based on at least one of loss and corruption of a portion of said file during said multicasting of said file to said first one of said endpoints; and retransmit said portion of said file, via multicasting, over said network, only to one of said second and third multicast groups corresponding to said first one of said endpoints.
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30. A multicast network endpoint for use as one of a plurality of endpoints comprising a first multicast group, with a network segmented into at least second and third multicast groups, said second and third multicast groups being subsets of said first multicast group, given ones of said endpoints being assigned to said second and third multicast groups based on likelihood of experiencing similar errors, said multicast network endpoint comprising:
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a memory; at least one processor coupled to said memory; and a non-transitory persistent storage medium which contains instructions which, when loaded into said memory, configure said at least one processor to be operative to; facilitate registering said endpoint in said first multicast group and in only one of said second and third multicast groups; receive a multicast of a file from an error-correcting multicast apparatus to said first multicast group over said network; dispatch, to said error-correcting multicast apparatus, over said network, a retransmission request, based on at least one of loss and corruption of a portion of said file during said multicasting of said file to said endpoint; and receive a retransmission of said portion of said file, via multicasting, from said error-correcting multicast apparatus, over said network, to one of said second and third multicast groups.
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Specification