Reducing overheads of a protocol data unit in a wireless communication system

• US 8,432,915 B2
• Filed: 03/11/2011
• Issued: 04/30/2013
• Est. Priority Date: 06/14/2004
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young Dae, Chun, Sung Duck, Yi, Seung June
• Primary Examiner(s): GHOWRWAL, OMAR J
• Application Number:
  US13/046,430
• Publication Number:
  US 20110158141A1
• Time in Patent Office: 781 Days
• Field of Search: 370/310, 370/351, 370/389, 370392-3951, 370/395.3, 370/431, 370/463, 370/464, 370465-467, 370469-476
• US Class Current: 370/392
• 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 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

The present invention relates to transmitting data units of a radio protocol layer, wherein one logical channel identifier is added to one or more data units belonging to one logical channel. Because only one logical channel identifier is added to the data units belonging to one logical channel in constructing a MAC-e PDU, overheads of the MAC-e PDU are reduced. Such reduction of the PDU overheads increases data throughput, which is advantageous for a high-speed data communication system, such as the HSUPA.

Claims

1. A terminal in a wireless communication system comprising:

a first entity handling a dedicated transport channel (DCH); and

a second entity handling an enhanced dedicated transport channel (E-DCH), wherein the second entity receives a plurality of service data units from the first entity, concatenates the plurality of received service data units, and adds a header to the concatenated service data units to generate a protocol data unit for an uplink,

wherein the protocol data unit comprises;

the concatenated plurality of service data units classified into at least two groups, each group having service data units belonging to each logical channel, and service data units belonging to one logical channel having a same size, and

a plurality of logical channel identifier information, wherein each of the plurality of logical channel identifier information relates to a respective group of the at least two groups;

wherein each logical channel is located between a radio link control (RLC) layer and a medium access control (MAC) layer,

wherein the MAC layer comprises the first entity and the second entity, and

wherein each of the logical channel identifier information is included in the header of the protocol data unit.

2. The terminal of claim 1, further comprising:

a physical layer receiving the generated protocol data unit from the second entity.

3. The terminal of claim 2, wherein the physical layer receives the generated protocol data unit from the second entity via the E-DCH.

4. The terminal of claim 2, wherein the physical layer transmits the generated protocol data unit to a network.

5. The terminal of claim 1, wherein the protocol data unit further comprises each length information included for each group, indicating a size of the service data units belonging to each logical channel.

6. The terminal of claim 5, wherein each length information comprises size information indicating a size of one service data unit.

7. The terminal of claim 6, wherein each length information further comprises number information indicating a number of the service data units belonging to each logical channel.

8. The terminal of claim 5, wherein each length information is included in the header of the protocol data unit.

9. The terminal of claim 8, wherein each length information is included in the header of the protocol data unit regardless of the size of the service data units belonging to each logical channel.

10. The terminal of claim 1, wherein the first entity is a MAC-d layer and the second entity is a MAC-e layer.

11. A network in a wireless communication system comprising:

a first entity handling a dedicated transport channel (DCH); and

a second entity handling an enhanced dedicated transport channel (E-DCH), wherein the second entity receives a protocol data unit including a header and a plurality of concatenated service data units, disassembles the plurality of concatenated service data units, and delivers the disassembled service data units to the first entity,

wherein the protocol data unit comprises;

the plurality of concatenated service data units classified into at least two groups, each group having service data units belonging to each logical channel, and service data units belonging to one logical channel having a same size, and

a plurality of logical channel identifier information, wherein each of the plurality of logical channel identifier information relates to a respective group of the at least two groups;

wherein each logical channel is located between a radio link control (RLC) layer and a medium access control (MAC) layer,

wherein the MAC layer comprises the first entity and the second entity, and

wherein each of the logical channel identifier information is included in the header of the protocol data unit.

12. The network of claim 11, wherein the second entity reads the header of the protocol data unit after receiving the protocol data unit.

13. The network of claim 11, wherein the received protocol data unit comprises each length information included for each group, indicating a size of the service data units belonging to each logical channel.

14. The network of claim 13, wherein each length information comprises size information indicating a size of one service data unit.

15. The network of claim 14, wherein each length information further comprises number information indicating a number of the service data units belonging to each logical channel.

16. The network of claim 13, wherein each length information is included in the header of the protocol data unit.

17. The network of claim 16, wherein each length information is included in the header of the protocol data unit regardless of the size of the service data units belonging to each logical channel.

18. The network of claim 11, wherein the first entity is a MAC-d layer and the second entity is a MAC-e layer.

19. The network of claim 11, further comprising:

a physical layer receiving the protocol data unit from a terminal.

20. The network of claim 19, wherein the physical layer transfers the protocol data unit to the second entity via the E-DCH.