Method and system for transmitting data in a packet based communication network

Transmission system for transmitting data in a packet based communication network system through a tunnel, said packet based communication network system comprising

• at least a first communication network (100, 200, 300, 400) having a network element (310, 410), a receiving node (40;
• 210) and a sending node (10;110), wherein said receiving node and said sending node communicate with each other via said at least first communication network,
• said transmission system comprising:
• an encapsulator unit (10) adapted to encapsulate an original packet generated by said sending node and to be sent to said receiving node, wherein said original packet comprises
• a first header indicating a source address and a destination address for the transmission of said original packet and
• a payload,
• wherein said encapsulator unit is adapted to generate a tunneled packet by encapsulating said original packet with a second header so that said first header is an inner header and said second header is an outer header of said tunneled packet, said outer header indicating an intermediate source address and an intermediate destination address of an intermediate network station for the transmission of said tunneled packet,
• a first compressor unit (10) adapted to compress said inner header in order to form a compressed inner header,
• a second compressor unit (10) adapted to compress said outer header in order to form a compressed outer header,
• wherein said compressed inner header, said compressed outer header, and said payload are combined into a compressed packet.

Compressor entity usable for a data transmission in a packet based communication network system through a tunnel, said packet based communication network system comprising

• at least a first communication network (100, 200, 300, 400) having a network element (310, 410), a receiving node (40;
• 210) and a sending node (10;110), wherein said receiving node and said sending node communicate with each other via said at least first communication network,
• wherein an original packet generated by said sending node and to be sent to said receiving node, said original packet comprising
• a first header indicating a source address and a destination address for the transmission of said original packet and
• a payload,
• is encapsulated with a second header into a tunneled packet so that said first header is an inner header and said second header is an outer header of said tunneled packet, said outer header indicating an intermediate source address and an intermediate destination address of an intermediate network station for the transmission of said tunneled packet,
• wherein said compressor entity comprises
• a first compressor unit adapted to compress said inner header in order to form a compressed inner header, and
• a second compressor unit adapted to compress a said outer header in order to form a compressed outer header,
• wherein said compressed inner header, said compressed outer header, and said payload are combined into a compressed packet.

Decompressor unit usable for a data transmission in a packet based communication network system through a tunnel, said packet based communication network system comprising

• at least a first communication network (100, 200, 300, 400) having a network element (310, 410), a receiving node (40;
• 210) and a sending node (10;110), wherein said receiving node and said sending node communicate with each other via said at least first communication network,
• wherein an original packet generated by said sending node and to be sent to said receiving node, said original packet comprising
• a first header indicating a source address and a destination address for the transmission of said original packet and
• a payload,
• is encapsulated with a second header into a tunneled packet so that said first header is an inner header and said second header is an outer header of said tunneled packet, said outer header indicating an intermediate source address and an intermediate destination address of an intermediate network station for the transmission of said tunneled packet, and
• said tunneled packet is compressed into a compressed packet wherein said inner header is compressed in order to form a compressed inner header and said outer header is compressed in order to form a compressed outer header, wherein said compressed inner header, said compressed outer header, and said payload are combined into said compressed packet
• wherein said decompressor entity is adapted to decompress said outer header from said compressed packet, wherein said outer header, said compressed inner header and said payload are combined into a routing packet.

Decapsulator entity usable for a data transmission in a packet based communication network system through a tunnel, said packet based communication network system comprising

• at least a first communication network (100, 200, 300, 400) having a network element (310, 410), a receiving node (40;
• 210) and a sending node (10;110), wherein said receiving node and said sending node communicate with each other via said at least first communication network,
• wherein an original packet generated by said sending node and to be sent to said receiving node, said original packet comprising
• a first header indicating a source address and a destination address for the transmission of said original packet and
• a payload,
• is encapsulated with a second header into a tunneled packet so that said first header is an inner header and said second header is an outer header of said tunneled packet, said outer header indicating an intermediate source address and an intermediate destination address of an intermediate network station for the transmission of said tunneled packet,
• said tunneled packet is compressed into a compressed packet wherein said inner header is compressed in order to form a compressed inner header and said outer header is compressed in order to form a compressed outer header, wherein said compressed inner header, said compressed outer header, and said payload are combined into said compressed packet, and
• said compressed packet is decompressed into a routing packet so that said outer header from said compressed packet is decompressed, wherein said outer header, said compressed inner header and said payload are combined into said routing packet,
• wherein said decapsulator entity is adapted to remove said outer header from said routing packet, and to decompress said inner header in said routing packet whereby said original packet is reconstructed.