RADIO COMMUNICATION SCHEME FOR PROVIDING MULTIMEDIA BROADCAST AND MULTICAST SERVICES (MBMS)

• US 20090225693A1
• Filed: 05/12/2009
• Published: 09/10/2009
• Est. Priority Date: 09/23/2002
• 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 7,756,079 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• 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 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 76/40 for selective distribution or broadcast

Abstract

A radio communication scheme applicable to UMTS providing packet data services, such as multimedia broadcast and multicast services (MBMS), to one or more users by modifying (augmenting) certain existing radio communication protocols while employing a new transport channel (a point-to-multipoint DSCH), and/or by establishing new physical downlink shared channels (C-PDSCH and D-PDSCH). An RLC layer is provided in a single CRNC so that the same MBMS can be transmitted to a plurality of terminals via a point-to-multipoint DSCH, without having to repetitively provide many RLC layers in many SRNCs. Alternatively, a C-PDSCH (physical downlink shared channel for control) and a D-PDSCH (physical downlink shared channel for data) are established to allow periodic transmission of MBMS, permitting users to simultaneously access one or more MBMS.

Claims

1. A method of providing a broadcast or multicast service, the method comprising:

transmitting control information via a second downlink common physical channel such that at least one terminal is able to receive data of the broadcast or multicast service which is transmitted via a first downlink common physical channel; and

transmitting the data via the first downlink common physical channel,

wherein the second downlink common physical channel comprises at least one of a TFCI (Transport Format Combination Indicator) field and a Pilot field, and

wherein the second downlink common physical channel further comprises data of a service which is different from the transmitted data of the broadcast or multicast service.

2. The method of claim 1, wherein the first downlink common physical channel is mapped to a downlink common transport channel.

3. The method of claim 1, wherein the first downlink common physical channel is a downlink common data physical channel.

4. The method of claim 1, wherein the second downlink common physical channel is a downlink common control physical channel.

5. The method of claim 1, wherein the data transmitted via the first downlink common physical channel is used by a plurality of codes.

6. The method of claim 1, wherein control information of the second downlink common physical channel comprises at least one of a receiving indicator field and a channel code field.

7. The method of claim 1, wherein the second downlink common physical channel further comprises a receiving indicator field and a channel code field.

8. The method of claim 2, wherein the downlink common transport channel is a FACH (Forward Access Channel) or a DSCH (Downlink Shared Channel).

9. The method of claim 1, wherein the first downlink common physical channel and the second downlink common physical channel use a different code respectively.

10. A method of receiving a broadcast or multicast service, the method comprising:

receiving control information via a second downlink common physical channel to receive data of the broadcast or multicast service which is received via a first downlink common physical channel from a network; and

receiving the data via the first downlink common physical channel,

wherein the second downlink common physical channel comprises at least one of a TFCI (Transport Format Combination Indicator) field and a Pilot field, and

wherein the second downlink common physical channel further comprises data of a service which is different from the received data of the broadcast or multicast service.

11. The method of claim 10, wherein the first downlink common physical channel is mapped to a downlink common transport channel.

12. The method of claim 10, wherein the first downlink common physical channel is a downlink common data physical channel.

13. The method of claim 10, wherein the second downlink common physical channel is a downlink common control physical channel.

14. The method of claim 10, wherein the data transmitted via the first downlink common physical channel is used by a plurality of codes.

15. The method of claim 10, wherein control information of the second downlink common physical channel comprises at least one of a receiving indicator field and a channel code field.

16. The method of claim 10, wherein the second downlink common physical channel further comprises a receiving indicator field and a channel code field.

17. The method of claim 11, wherein the downlink common transport channel is a FACH (Forward Access Channel) or a DSCH (Downlink Shared Channel).

18. The method of claim 10, wherein the first downlink common physical channel and the second downlink common physical channel use a different code respectively.