Method of multiplexing logical channels in mobile communication system and apparatus thereof

• US 20040156330A1
• Filed: 11/06/2003
• Published: 08/12/2004
• Est. Priority Date: 11/07/2002
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung-June, Lee, Young-Dae, Lee, So-Young
• Application Number:
  US10/703,793
• Publication Number:
  US 20040156330A1
• Time in Patent Office: Days
• US Class Current: 370/328
• 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 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 74/00 Wireless channel access

Abstract

For multiplexing logical channels, at least two common logical channels of the same type are multiplexed to the same transport channel in a mobile communication system. When the transport channel carries different types of logical channels, a Common Logical channel Identifier (CLI) is defined and inserted into a MAC PDU header so that the different logical channels can be identified. Multiple services having a different quality of service (QoS) or multiple streams of different QoS in the same service can be handled and provided to user equipment (UE).

Claims

1. In a mobile communication system, a channel multiplexing system multiplexes the same type of common logical channels to one transport channel for providing a multimedia service.

2. The system of claim 1, wherein the multimedia service is a multimedia broadcast service or a multimedia multicast service.

3. The system of claim 1, wherein the multiplexing step is performed in a medium access control (MAC) layer.

4. The system of claim 3, wherein the MAC is a common MAC.

5. The system of claim 3, wherein the MAC is a layer that manages a common transport channel including a multimedia broadcast transport channel.

6. The system of claim 3, wherein the MAC is a layer that manages a common transport channel including a multimedia multicast transport channel.

7. The system of claim 1, wherein the mobile communication system allocates to each common logical channel an identifier identifying the common logical channel.

8. The system of claim 7, wherein allocation of the identifier is handled by a radio resource control (RRC) layer of a radio access network.

9. The system of claim 8, wherein the RRC layer of the radio access network transfers allocation information of the identifier to a medium access control (MAC) layer of the radio access network.

10. The system of claim 9, wherein the RRC layer of the radio access network transfers allocation information of the identifier to an RRC layer of a terminal.

11. The system of claim 10, wherein if the common logical channel provides a broadcast or a multicast service, the RRC layer of the radio access network transfers the allocation information of the identifier to RRC layers of a terminal group that desires to receive the broadcast or multicast service.

12. The system of claim 7, wherein the mobile communication system adds an allocated identifier to each data unit of a corresponding channel.

13. The system of claim 7, wherein the identifier identifies a specific common logical channel among the same type of common logical channels.

14. The system of claim 1, wherein each common logical channel of the same type is allocated a different identifier.

15. The system of claim 1, wherein each common logical channel receives a data unit from a specific radio link control (RLC) layer entity.

16. In a mobile communication system, a method of multiplexing logical channels, comprising:

multiplexing data units of the same type of common logical channels to a single transport channel;

adding an identifier to each multiplexed data unit for transmission thereof.

17. The method of claim 16, wherein the identifier identifies a specific common logical channel among the same type of common logical channels.

18. The method of claim 16, wherein the mobile communication system allocates an identifier identifying the common logical channels to each common logical channel.

19. The method of claim 18, wherein the identifier is allocated by a RRC (Radio Resource Control) layer of a radio access network.

20. The method of claim 19, wherein the RRC layer of the radio access network transfers allocation information of the identifier to a MAC (Medium Access Control) layer of the radio access network.

21. The method of claim 20, wherein the RRC layer of the radio access network transfers the allocation information of the identifier to an RRC layer of a terminal.

22. The method of claim 21, wherein, if the common logical channel provides a broadcast or multicast service, the RRC layer of the radio access network transfers the allocation information of the identifier to the RRC layers of all terminals within a terminal group that desire to receive the broadcast or multicast service.

23. The method of claim 16, wherein each common logical channel of the same type is allocated a different identifier.

24. The method of claim 16, wherein data units of each common logical channel are transmitted from an entity of a specific RLC (Radio Link Control) layer.

25. The method of claim 16, wherein the multiplexing step is performed in a MAC (Medium Access Control) layer.

26. The method of claim 25, wherein the MAC layer manages common transport channels including a multimedia broadcast or multicast transport channel.

27. The method of claim 26, wherein each data unit having an identifier attached thereto is transferred to a MAC layer of a receiver by a physical layer service.

28. The method of claim 16, wherein the multimedia service is a multimedia broadcast service or a multimedia multicast service.

29. In a mobile communication system, a method of multiplexing logical channels, comprising:

multiplexing data units of the same type of common logical channels to the single transport channel;

transmitting the multiplexed data units to a receiver; and

de-multiplexing the transmitted data units to at least two or more common logical channels of the same type.

30. The method of claim 29, wherein the multiplexing step comprises:

multiplexing data received via a plurality of common logical channels of the same type;

attaching an identifier to a header of the received data to generate a protocol data unit (PDU); and

transmitting the generated PDU through a specific transport channel.

31. The method of claim 30, wherein the identifier identifies a specific common logical channel among the same type of common logical channels.

32. The method of claim 30, wherein the data units of the common logical channels are transmitted from specific RLC (Radio Link Control) layer entities.

33. The method of claim 29, wherein the mobile communication system allocates an identifier for identifying the common logical channel to each common logical channel.

34. The method of claim 33, wherein the identifier is allocated by a RRC (Radio Resource Control) layer of a radio access network.

35. The method of claim 34, wherein the RRC layer of the radio access network transfers allocation information of the identifier to a MAC (Medium Access Control) layer of the radio access network.

36. The method of claim 35, wherein the RRC layer of the radio access network transfers the allocation information of the identifier to a RRC layer of a terminal.

37. The method of claim 36, wherein, if the common logical channel provides a broadcast or multicast service, the RRC layer of the radio access network transfers the allocation information of the identifier to RRC layers of a terminal group which desires to receive the broadcast or multicast service.

38. The method of claim 29, wherein the de-multiplexing step comprises:

receiving data through a specific transport channel;

checking the identifier of the received data and de-multiplexing the received data; and

transmitting each received data to a higher layer through the common logical channel identified by the identifier.

39. The method of claim 38, wherein each received data is transferred to a specific RLC (Radio Link Control) layer entity.

40. The method of claim 29, wherein the multiplexing step is performed in a MAC (Medium Access Control) layer.

41. The method of claim 40, wherein the MAC layer manages common transport channels including a broadcast or multicast transport channel.

42. The method of claim 29, wherein each common logical channel of the same type is allocated a different identifier.

43. The method of claim 29, wherein each data units having the identifier attached thereto is transferred to a MAC (Medium Access Control) layer of a receiver by a physical layer service.

44. The method of claim 29, wherein the multimedia service is a multimedia broadcast service or a multimedia multicast service.

45. The method of claim 29, wherein the common logical channels transmit different types of media data.

46. The method of claim 45, wherein each media data has a different quality of service (QoS).