Saving bandwidth in transmission of compressed data
First Claim
1. A method of transmitting content across a link in a communications network, the method comprising:
- examining specified traffic in the network at a sender end of the link to determine if the traffic is carrying any compressed content;
when the specified traffic is carrying compressed content, decompressing, at the sender end of the link, at least one portion of the compressed content to obtain decompressed data, decompressed at the sender end of the link from the compressed content in the examined specified traffic;
comparing the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic, with content of a sender cache to determine if the sender cache has content matching the decompressed data obtained from the compressed content from the specified traffic;
when the sender cache has content matching the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic, determining an identifier associated with said decompressed data obtained from the compressed content from the specific traffic; and
using the associated identifier to reconstruct, at a receiving end of the link, the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic.
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Abstract
A method, system and computer program product for transmitting content across a link in a communications network. In an embodiment, the method comprises examining traffic in the network at a sender end of the link to determine if the traffic is carrying compressed content; when the traffic is carrying compressed content, decompressing at least one portion of the compressed content; and checking a cache to determine if the cache has content matching the at least one decompressed portion of the content. In an embodiment, the method further comprises when the cache has content matching the at least one decompressed portion of the content, determining an identifier associated with the at least one decompressed portion of the content; and using the identifier to reconstruct, at a receiving end of the link, the at least one decompressed portion of the content. In one embodiment, the at least one decompressed portion of the content from the traffic is replaced with an index, the index is compressed to form the associated identifier, and the associated identifier is sent to the receiving end of the link.
65 Citations
22 Claims
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1. A method of transmitting content across a link in a communications network, the method comprising:
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examining specified traffic in the network at a sender end of the link to determine if the traffic is carrying any compressed content; when the specified traffic is carrying compressed content, decompressing, at the sender end of the link, at least one portion of the compressed content to obtain decompressed data, decompressed at the sender end of the link from the compressed content in the examined specified traffic; comparing the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic, with content of a sender cache to determine if the sender cache has content matching the decompressed data obtained from the compressed content from the specified traffic; when the sender cache has content matching the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic, determining an identifier associated with said decompressed data obtained from the compressed content from the specific traffic; and using the associated identifier to reconstruct, at a receiving end of the link, the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for transmitting content across a link in a communications network, the system comprising:
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a caching sender at a sender end of the link, and a caching receiver at a receiver end of the link, for exchanging data packets over the link; the caching sender including a first cache, and the caching receiver including a second cache; the caching sender for examining specified traffic in the network to determine if the traffic is carrying any compressed content; and
when the specified traffic is carrying compressed content, for decompressing, at the sender end of the link, at least one portion of the compressed content to obtain decompressed data, decompressed at the sender end of the link from the compressed content in the examined specified traffic, and comparing the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic with content of the first cache to determine if the first cache has content matching the decompressed data obtained from the compressed content from the specified traffic; and
when the first cache has content matching the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic, determining an identifier associated with said decompressed data obtained from the compressed content from the specified traffic; andthe caching receiver for receiving the associated identifier from the caching sender, and using the associated identifier to reconstruct the decompressed content, decompressed at the sender end of the link from the specified traffic. - View Dependent Claims (11, 12, 13, 14)
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15. An article of manufacture comprising:
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at least one tangible computer readable device having computer readable program code logic tangibly embodied therein to transmit content across a link in a communications network, the computer readable program code logic, when executing, performing the following; examining specified traffic in the network at a sender end of the link to determine if the traffic is carrying any compressed content; when the specified traffic is carrying compressed content, decompressing, at the sender end of the link, at least one portion of the compressed content to obtain decompressed data, decompressed at the sender end of the link from the compressed content in the examined specified traffic; comparing the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic with content of a sender cache to determine if the sender cache has content matching the decompressed data obtained from the compressed content from the specified traffic; when the sender cache has content matching the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic, determining an identifier associated with said decompressed data obtained from the compressed content from the specified traffic; and using the associated identifier to reconstruct, at a receiving end of the link, the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic. - View Dependent Claims (16, 17)
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18. A method of saving bandwidth in transmission of compressed data, the method comprising:
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examining specified traffic in the network at a sender end of a network link to determine if the traffic is carrying any compressed content; when the specified traffic is carrying compressed content, decompressing, at the sender end of the link, at least one portion of the compressed content to obtain decompressed data, decompressed at the sender end of the link from the compressed content in the examined specified traffic; comparing the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic with content of a sender cache to determine if the sender cache has content matching the decompressed data obtained from the compressed content from the specified traffic; when the sender cache has content matching the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic, replacing said decompressed data obtained from the compressed content from the specified traffic with an associated index; compressing said index to form a compressed identifier; sending the compressed identifier over the link to a receiver end of the link; at the receiver end of the link, decompressing the compressed identifier to form the index associated with the decompressed data, decompressed at the sender end of the link from the compressed content from the specified traffic; and replacing the index with content from a receiver cache to reconstruct, at the receiver end of the link, the decompressed data obtained from the compressed content from the specified traffic. - View Dependent Claims (19, 20, 21, 22)
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Specification