| 摘要 |
A packet of data comprises a header and a payload. Payload compression is performed on both the payload and the header, following which the compressed header and payload are encapsulated to create a transmission data packet and the transmission packet is transmitted across the network. The method may be used to compress a Mobile IP (MIP) packet (figure 1) or a Mobile Virtual Private Network (MVPN) packet (figure 6). In the case of the MIP packet, the header compression is performed on the VPN header 150 and the payload compression is performed on the VPN payload, comprising the IP header 130, TCP header 120 and user data 110, to produce a payload compression (PC) header 210 and payload compressed data 220. The header compression creates a header compressed (HC) header 230 and header compressed data 240 containing the VPN header. The dual compressed VPN data packet is then encapsulated within an MIP header 250. Figures 6 and 7 illustrate the compression occurring in the case of an MVPN packet.
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