METHOD OF TRANSMITTING DATA IN A WIRELESS COMMUNICATION SYSTEM

• US 20110228799A1
• Filed: 05/26/2011
• Published: 09/22/2011
• Est. Priority Date: 05/02/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung June, Lee, Young Dae, Yi, Seung June, Chun, Sung Duck
• Granted Patent: US 8,798,070 B2
• Time in Patent Office: Days
• US Class Current: 370/476
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365

Abstract

A method of generating a data block to be transmitted from a protocol layer to a receiving side in a wireless communication system, the protocol layer having a header compression function, comprises generating at least one of a control packet which includes control information and a compressed packet generated by header compression for an upper layer data block, and generating a first lower layer data block which includes type indication information and the control packet, if the control packet is generated, the type indication information indicating a type of control information included in the generated control packet.

Claims

1. A transmitting apparatus for generating a data block to be transmitted to a receiving apparatus in a wireless communication system, the transmitting apparatus comprising:

a processor configured to generate at least one of a compressed packet by performing the header compression function for an upper layer data block received from an upper layer and a control packet having no relation with the upper layer data block; and

if the compressed packet is generated, configured to generate a first lower layer data block which includes the compressed packet and generate a second lower layer data block which includes the control packet,

wherein the processor is configured to generate each of the first lower layer data block and the second lower layer data block to include an indicator indicating whether the corresponding lower layer data block includes the compressed packet or the control packet, and wherein the processor is configured to generate the second lower layer data block to further include type indication information indicating whether the control packet includes header compression feedback information, and

wherein the processor is configured to cipher the compressed packet and add the indicator to the ciphered compressed packet to generate the first lower layer data block, whereas the processor is configured to add the indicator and the type indication information to the control packet without ciphering the control packet to generate the second lower layer data block.

2. The transmitting apparatus of claim 1, wherein the indicator is included in a header of the first lower layer data block, and the type indication information and the indicator are included in a header of the second lower layer data block.

3. The transmitting apparatus of claim 1, wherein the processor is configured to generate the second lower layer data block to include a sequence number, while generate the first lower layer data block not to include a sequence number.

4. The transmitting apparatus of claim 1, wherein the type indication information indicates whether the control packet includes status information for at least one data block received from the receiving apparatus.

5. The transmitting apparatus of claim 1, wherein the header compression feedback information is associated with header compression of a data block received from the receiving apparatus.

6. The transmitting apparatus of claim 1, wherein the processor is configured to include a header compression entity configured to perform the header compression function, wherein the header compression entity is configured to generate at least one of the control packet and the compressed packet.

7. The transmitting apparatus of claim 6, wherein the processor is configured to further include a ciphering entity configured to cipher the compressed packet.

8. The transmitting apparatus of claim 7, wherein the processor is configured to further include a header addition entity configured to add the indicator to the ciphered compressed packet or add the indicator and the type indication information to the control packet not ciphered by the ciphering entity.

9. The transmitting apparatus of claim 1, further comprising:

a transmitter configured to transmit the first lower layer data block and the second lower layer data block to the receiving apparatus.

10. A receiving apparatus for receiving a data block transmitted by a transmitting apparatus in a wireless communication system, the receiving apparatus comprising:

a processor configured to determine, based on an indicator included in the data block, whether the data block includes a compressed packet generated by performing the header compression function for an upper layer data block or a control packet having no relation with the upper layer data block; and

if the indicator indicates that the data block includes the control packet, configured to determine, based on type indication information included in the data block, whether the control packet includes header compression feedback information, wherein;

if the data block includes the compressed packet, the processor is further configured to de-cipher the compressed packet;

perform header de-compression on the de-ciphered compressed packet; and

transfer the de-compressed packet to an upper layer of the receiving apparatus, and

if the data block includes the control packet, the processor is further configured to transfer the control packet to the upper layer of the receiving apparatus without de-ciphering or without de-compressing the control packet.

11. The receiving apparatus of claim 10, wherein if the data block includes the compressed packet, the data block does not include the type indication information.

12. The receiving apparatus of claim 11, wherein the indicator and the type indication are included in a header of the data block.

13. The receiving apparatus of claim 12, wherein the processor is configured to remove the header from the data block.

14. The receiving apparatus of claim 13, wherein the processor is configured to include a header removing entity configured to remove the header from the data block.

15. The receiving apparatus of claim 10, wherein the data block includes a sequence number if the data block includes the compressed packet, while the data block does not include a sequence number if the data block includes the control packet.

16. The receiving apparatus of claim 10, wherein the processor is configured to further determine, based on the type indication information, whether the control packet includes status information for at least one data block received at the transmitting apparatus from the receiving apparatus.

17. The receiving apparatus of claim 10, wherein the header compression feedback information is associated with header compression of a data block transmitted from the receiving apparatus to the transmitting apparatus.

18. The receiving apparatus of claim 10, wherein the processor is configured to further include a header de-compression entity configured to perform the header de-compression on the de-ciphered compressed packet.

19. The receiving apparatus of claim 10, further comprising:

a receiver configured to receive the first lower layer data block and the second lower layer data block from the transmitting apparatus.