METHOD FOR TRANSMITTING/RECEIVING BROADCAST OR MULTICAST SERVICE AND TERMINAL THEREOF

• US 20100325504A1
• Filed: 06/18/2008
• Published: 12/23/2010
• Est. Priority Date: 06/18/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung-June, Park, Sung-Jun, Lee, Young-Dae, Chun, Sung-Duck
• Granted Patent: US 8,438,446 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• 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 88/02 Terminal devices

Abstract

A method for receiving a multimedia broadcast/multicast service (MBMS) is provided. The method for receiving a broadcast or multicast service includes: attempting receiving of data via a channel for the broadcast or multicast service; transmitting a negative acknowledgement to a base station if the data is not received via the channel; and receiving the data.

Claims

1. A method for receiving a broadcast or multicast service, comprising:

attempting receiving of data via a channel for the broadcast or multicast service;

transmitting a negative acknowledgement to a base station if the data is not received via the channel; and

receiving the data.

2. The method of claim 1, wherein the channel for the broadcast or multicast service is an MCCH (Multicast Control Channel) for MBMS (Multimedia Broadcast Multicast Service) control information, or an MTCH (Multicast Traffic Channel) for user data of the MBMS.

3. The method of claim 1, wherein the channel for the broadcast or multicast service is mapped to a DL SCH (Downlink Shared Channel) or PDCCH (Physical Downlink Control Channel).

4. The method of claim 2, wherein the data including the MBMS control information is transmitted using an RRC (Radio Resource Control) message.

5. The method of claim 1, wherein the negative acknowledgement is transmitted by an HARQ (Hybrid Automatic Repeat Request) entity in a MAC layer via a PUCCH (Physical Uplink Control Channel).

6. The method of claim 1, further comprising:

receiving HARQ (Hybrid Automatic Repeat Request) configuration information from the base station.

7. A method for transmitting a broadcast or multicast service, comprising:

transmitting data to a terminal via a channel for the broadcast or multicast service;

receiving a negative acknowledgement from the terminal; and

retransmitting the data to the terminal.

8. The method of claim 7, wherein the channel for the broadcast or multicast service is an MCCH (Multicast Control Channel) for MBMS (Multimedia Broadcast Multicast Service) control information, or an MTCH (Multicast Traffic Channel) for user data of the MBMS.

9. The method of claim 7, wherein the channel for the broadcast or multicast service is mapped to a DL SCH (Downlink Shared Channel) or a PDCCH (Physical Downlink Control Channel).

10. The method of claim 8, wherein the data including the MBMS control information is transmitted using an RRC (Radio Resource Control) message.

11. The method of claim 7, wherein the negative acknowledgement is received by an HARQ (Hybrid Automatic Repeat Request) entity in a MAC layer via a PUCCH (Physical Uplink Control Channel).

12. The method of claim 7, further comprising:

transmitting HARQ (Hybrid Automatic Repeat Request) configuration information related to the retransmission to the terminal.

13. A terminal having a MAC layer comprising:

an HARQ (Hybrid Automatic Repeat Request) entity that attempts receiving of a PDU (Protocol Data Unit) of a broadcast or multicast service from a base station via a DL-SCH (Downlink Shared Channel), and transmits a negative acknowledgement to the base station if receiving of the PDU fails;

a disassemble entity that generates an SDU (Service Data Unit) by using the PDU; and

a de-multiplexing entity that delivers the SDU to an upper layer.

14. A terminal comprising:

a transmission/reception unit that attempts receiving of data via a channel for a broadcast or multicast service and transmits a negative acknowledgement to a base station if receiving of the data fails; and

a controller that controls transmitting of the negative acknowledgement in case where the receiving of the data fails.