Data transmission method for HSDPA

• US 7,403,541 B2
• Filed: 01/02/2003
• Issued: 07/22/2008
• Est. Priority Date: 01/05/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung-June, Lee, So-Young, Yeo, Woon-Young
• Primary Examiner(s): LEE, CHI HO A
• Application Number:
  US10/334,704
• Publication Number:
  US 20030131124A1
• Time in Patent Office: 2,028 Days
• Field of Search: None
• US Class Current: 370/469
• 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
• CPC Class Codes: H04W 28/14 using intermediate storage

Abstract

In the data transmission method of an HSDPA system according to the present invention, a transmitter transmits Data Blocks each composed of one or more data units originated from a same logical channel, and a receiver receives the Data Block through a HS-DSCH and distributes the Data Block to a predetermined reordering buffer. Since each Data Block is composed of the MAC-d PDUs originated from the same logical channel, it is possible to monitor the in-sequence delivery of the data units, resulting in reduction of undesirable queuing delay caused by logical channel multiplexing.

Claims

1. A method for processing packet data in a communications system, the method comprising:

receiving, from an upper layer, at least one data unit through each of a plurality of logical channels;

constructing a data block comprising the at least one data unit received through a specific one of the plurality of logical channels and assigning an identifier associated with the specific logical channel to the data block;

transmitting the data block;

receiving and processing the data block such that the at least one data unit from the specific logical channel is forwarded to a reordering buffer associated with the specific logical channel based on the identifier, wherein the reordering buffer is configured per the specific logical channel thereby processing the data block; and

delivering, to an upper layer, the at least one data unit through a corresponding specific logical channel.

2. The method of claim 1, wherein the step of processing comprises configuring one or more reordering buffers corresponding to each of the plurality of logical channels.

3. The method of claim 1, wherein the step of delivering comprises determining whether the at least one data unit in the data block was received in sequence.

4. The method of claim 3, wherein the least one data unit is delivered through the corresponding specific logical channel if it is determined that the at least one data unit was received in sequence.

5. The method of claim 3, wherein, if it is determined that the least one data unit was received out of sequence, the at least one data unit is reordered with any other data units stored in the reordering buffer and it is determined if the reordered data units are in the proper sequence for delivery through the corresponding specific logical channel.

6. The method of claim 1, wherein the steps of receiving the data block and delivering are performed in a medium access control (MAC) layer.

7. A method for processing packet data in a communications system, the method comprising:

receiving a data block, the data block comprising at least one data unit received through a specific one of a plurality of logical channels and having an identifier associated with the specific logical channel;

processing the data block such that the at least one data unit from the specific logical channel is forwarded to a reordering buffer associated with the specific logical channel based on the identifier, wherein the reordering buffer is configured per the specific logical channel thereby processing the data block; and

delivering the at least one data unit to an upper layer through a corresponding specific logical channel.

8. The method of claim 7, wherein the step of processing comprises configuring one or more reordering buffers corresponding to each of the plurality of logical channels.

9. The method of claim 7, wherein the step of delivering comprises determining whether the at least one data unit in the data block was received in sequence.

10. The method of claim 9, wherein the least one data unit is delivered through the corresponding specific logical channel if it is determined that the at least one data unit was received in sequence.

11. The method of claim 9, wherein, if it is determined that the least one data unit was received out of sequence, the at least one data unit is reordered with any other data units stored in the reordering buffer and it is determined if the reordered data units are in the proper sequence for delivery through the corresponding specific logical channel.

12. The method of claim 7, wherein the steps of receiving and delivering are performed in a medium access control (MAC) layer.

13. A system for processing packet data in a communications system, the system comprising:

a transmitting unit to receive at least one data unit through each of a plurality of logical channels, construct a data block comprising the at least one data unit received through a specific one of the plurality of logical channels, assign an identifier associated with the specific logical channel to the data block and transmit the data block; and

a receiving unit to receive and process the data block such that the at least one data unit from the specific logical channel is forwarded to a reordering buffer associated with the specific logical channel based on the identifier and deliver the at least one data unit to an upper layer through a corresponding specific logical channel, wherein the reordering buffer is configured per the specific logical channel in order to process the data block.

14. The system of claim 13, wherein the receiving unit is further to process the data block by configuring one or more reordering buffers corresponding to each of the plurality of logical channels.

15. The system of claim 13, wherein the receiving unit is further to deliver the at least one data unit in the data block by determining whether the at least one data unit was received in sequence.

16. The system of claim 15, wherein the receiving unit is further to deliver the at least one data unit through the corresponding specific logical channel if it is determined that the least one data unit was received in sequence.

17. The system of claim 15, wherein, if it is determined that the at least one data unit was received out of sequence, the receiving unit is further to reorder the at least one data unit with any other data units stored in the reordering buffer and determine if the reordered data units are in the proper sequence for delivery through the corresponding specific logical channel.

18. The system of claim 13, wherein the receiving unit is further to perform the steps of receiving the data block and delivering in a medium access control (MAC) layer.

19. A receiving unit for processing packet data in a communications system, the network comprising:

a receiver to receive a data block comprising at least one data unit, the at least one data unit associated with a specific one of a plurality of logical channels and having an identifier associated with the specific logical channel; and

a controller to process the data block such that the at least one data unit from the specific logical channel is forwarded to a reordering buffer associated with the specific logical channel based on the identifier and deliver the at least one data unit to an upper layer through a corresponding specific logical channel, wherein the reordering buffer is configured per the specific logical channel in order to process the data block.

20. The system of claim 19, wherein the controller is further to configure one or more reordering buffers corresponding to each of the plurality of logical channels.

21. The system of claim 19, wherein the controller is further to determine whether the at least one data unit in the data block was received in sequence.

22. The system of claim 21, wherein the controller is further to deliver the at least one data unit through the corresponding specific logical channel if it is determined that the at least one data unit was received in sequence.

23. The system of claim 21, wherein, if it is determined that the least one data unit was received out of sequence, the controller is further to reorder the at least one data unit with any other data units stored in the reordering buffer and determine if the reordered data units are in the proper sequence for delivery through the corresponding specific logical channel.

24. The system of claim 19, wherein the controller is in a medium access control (MAC) layer.