Routing data packets in a compressed-header domain
First Claim
1. A method for routing a data packet comprising a header section and a pay-load section, said header section comprising a compressed header section containing coded information including routing information, comprising the steps of:
- receiving said data packet at an input interface routing said data packet to an output interface forwarding said data packet to said output interface, wherein said routing step comprises ascertaining said routing information from said compressed header section, and wherein said coded information is left unchanged in said routing and forwarding steps.
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Abstract
The invention concerns routing of data packets in a header-compressed domain. According to the method described, routing a data packet with a compressed header section and an uncompressed payload section comprises steps of receiving the data packet at an ingress interface, routing the data packet to an egress interface, and forwarding the data packet to the egress interface. According to this method, the compressed header section remains unchanged between the ingress interface and the egress interface. Various implementations of this method are described, including the use of the header compression context identifier (HCCID) by for routing the packets to the correct egress interface. Accordingly, a decompressor and a router are also disclosed.
139 Citations
50 Claims
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1. A method for routing a data packet comprising a header section and a pay-load section, said header section comprising a compressed header section containing coded information including routing information, comprising the steps of:
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receiving said data packet at an input interface routing said data packet to an output interface forwarding said data packet to said output interface, wherein said routing step comprises ascertaining said routing information from said compressed header section, and wherein said coded information is left unchanged in said routing and forwarding steps. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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- 33. A decompressor device, comprising an input interface adapted to receive at least one data packet containing compressed data, a decompressing means communicating with said input interface and adapted to decompress said compressed data such that decompressed data are created based on said compressed data, and an output interface communicating with said decompressing means and adapted to provide said decompressed data of said data packet, wherein said decompressing means is adapted to selectively decompress only compressed header data contained in a header section of said data packet.
- 44. A router device for routing at least one data packet with a compressed header section, comprising at least one input port adapted to receive said data packet through at least one first communication link, and a plurality of output ports, wherein said input port comprises a reading unit adapted to read a first header compression context identifier from said compressed header section, and a switching unit adapted to replace said first header compression context identifier by a second header compression identifier.
Specification