Multicast service providing method in mobile communication system

• US 20040117860A1
• Filed: 09/19/2003
• Published: 06/17/2004
• Est. Priority Date: 09/19/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young Dae, Yi, Seung June, Lee, So Young
• Granted Patent: US 7,864,722 B2
• Time in Patent Office: Days
• US Class Current: 725/147
• CPC Class Codes: H04L 12/1886 with traffic restrictions for efficiency improvement, e.g. involving subnets or subdomains
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

A multimedia service data transmitting method is disclosed. A logical channel indicator is added in service data mapped to a shared channel so that a terminal can discriminate a type of the service data transmitted through the shared channel. The logical channel indicator is a target channel type field (TCTF) and included in a header of the service data (MAC protocol unit).

Claims

1. A multicast service providing method in a wireless system in which a logical channel data is mapped to a common transport channel and transmitted to a receiving end, wherein a dedicated logical channel data and a common logical channel data are transmitted by using an unidirectional shared channel, such that the dedicated logical channel data and common logical channel data can be identified at the receiving end

2. The method of claim 1, wherein the dedicated logical channel is a dedicated traffic channel (DTCH) or a dedicated control channel (DCCH).

3. The method of claim 1, wherein the dedicated logical channel data is a multimedia broadcast/multicast service (MBMS) data.

4. The method of claim 1, wherein the common logical channel is an MBMS traffic channel (MTCH) or an MBMS control channel (MCCH).

5. The method of claim 1, wherein the dedicated logical channel data and common logical channel data are identified by a logical channel identifier.

6. The method of claim 5, wherein the logical channel identifier is a target channel type field (TCTF).

7. The method of claim 1, wherein the shared channel is a downlink shared channel (DSCH).

8. The method of claim 1, wherein the shared channel is a channel that transmits a data only.

9. The method of claim 1, wherein a control of the shared channel is a channel of which control information is transmitted through an associated channel.

10. The method of claim 1, wherein a data of the shared channel includes:

an indicator indicating a logical channel type;

an indicator indicating a multicast service type; and

a service data unit.

11. In a wireless communication method which a dedicated logical channel data and a common logical channel data are transmitted by using an uni-directional shared channel, wherein a data transmitted through the shared channel includes:

a first indicator indicating a logical channel type;

a second indicator indicating a multicast service type; and

a service data unit.

12. The method of claim 11, wherein the first indicator is a target channel type field (TCTF).

13. The method of claim 11, wherein the second indicator includes:

a terminal identifier; and

an indicator indicating a type of the terminal identifier.

14. The method of claim 13, wherein the terminal identifier is an MBMS radio network temporary identifier (RNTI).

15. The method of claim 11, wherein the first and second indicators are includes a header.

16. A method of providing a multicast service in a radio communication system, the method comprising:

receiving data of a dedicated logical channel having a corresponding first dedicated transport channel,

receiving data of a common logical channel having a corresponding second dedicated transport channel,

processing the dedicated logical channel data and the common logical channel data to form multiplexed data that contains an identifier to provide distinction between the dedicated logical channel data and the common logical channel data;

newly establishing a shared transport channel independent from the first and second dedicated transport channels; and

transporting the multiplexed data via the newly established shared transport channel.

17. The method of claim 16, further comprising a step of demultiplexing the multiplexed data received via the shared transport channel by using the identifier within the received multiplexed data.