Compression and decompression for network systems
View Patent ↗Method and system for processing a source protocol data unit (PDU) is provided. The method includes receiving the source PDU at a local router; determining whether to compress the source PDU or process the source PDU without compression; compressing the source PDU and setting a flag indicating that the source PDU is compressed; and transmitting the compressed source PDU via a network link. The system includes a host system that generates a source PDU; a local router that receives the source PDU and determines whether to compress the source PDU or process the source PDU without compression; compresses the source PDU and sets a flag indicating that the source PDU is compressed; and transmits the compressed source PDU via a network link to a remote router.
1. A method for processing a protocol data unit, comprising:
receiving the protocol data unit at a router;
the router determining whether to compress the protocol data unit or send the protocol data unit to a network without compression;
if the protocol data unit is to be compressed, the router determining whether to re-initialize compression history;
if compression history is to be re-initialized, the router re-initializing compression history for compressing the protocol data unit;
the router compressing the protocol data unit and setting a flag indicating that the protocol data unit is compressed and transmitting the compressed protocol data unit via a network link.
2. The method of claim 1 , wherein if compression history is not to be re-initialized, the router compresses the protocol data unit using a current compression history.
3. The method of claim 1 , wherein the protocol data received by the router is based on a first protocol.
4. The method of claim 3 , wherein the router wraps the protocol data unit in a secondary protocol data unit that is based on a second protocol and sends the secondary protocol data unit to another router.
5. The method of claim 4 , wherein the first protocol and the second protocol are different.
6. The method of claim 4 , wherein the other router examines a flag in the secondary protocol data unit and extracts a payload from the secondary protocol data unit.
7. The method of claim 6 , wherein the other router decompresses the payload.
8. The method of claim 6 , wherein the other router reconstructs the protocol data unit from the decompressed payload.
9. A network system, comprising:
a computing system for generating a protocol data unit; and
a first router that receives the protocol data unit and determines whether to compress the protocol data unit or send the protocol data unit to a network without compression; if the protocol data unit is to be compressed, the first router determines whether to re-initialize compression history; and if compression history is to be re-initialized, the first router re-initializes compression history for compressing the protocol data unit; compresses the protocol data unit; sets a flag indicating that the protocol data unit is compressed; and transmits the compressed protocol data unit via a network link.
10. The system of claim 9 , wherein if compression history is not to be re-initialized, the first router compresses the protocol data unit using a current compression history.
11. The system of claim 9 , wherein the protocol data unit received by the first router is based on a first protocol.
12. The system of claim 11 , wherein the first router wraps the protocol data unit in a secondary protocol data unit that is based on a second protocol and sends the secondary protocol data unit to a second router.
13. The system of claim 12 , wherein the first protocol and the second protocol are different.
14. The system of claim 12 , wherein the second router examines a flag in the secondary protocol data unit and extracts a payload from the secondary protocol data unit.
15. The system of claim 14 , wherein the second router decompresses the payload.
16. The system of claim 15 , wherein the second router reconstructs the protocol data unit from the decompressed payload.
17. A router, comprising:
a compression/decompression module for compressing and decompressing a protocol data unit; wherein the router receives the protocol data unit and determines whether to compress the protocol data unit or send the protocol data unit to a network without compression; if the protocol data unit is to be compressed, the router determines whether to re-initialize compression history; if compression history is to be re-initialized, the router re-initializes compression history for compressing the protocol data unit; compresses the protocol data unit; sets a flag indicating that the protocol data unit is compressed; and transmits the compressed protocol data unit via a network link.
18. The router of claim 17 , wherein the router wraps the protocol data unit as a secondary protocol data unit that is based on a protocol different from a protocol that was used for sending the protocol data unit to the router and sends the secondary protocol data unit to another router.
19. The router of claim 18 , wherein the second router examines a flag in the secondary protocol data unit and extracts a payload from the secondary protocol data unit.
20. The router of claim 19 , wherein the second router decompresses the payload and reconstructs the protocol data unit from the decompressed payload.