Method for transmitting/receiving broadcast or multicast service and terminal thereof

• US 8,438,446 B2
• Filed: 06/18/2008
• Issued: 05/07/2013
• Est. Priority Date: 06/18/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young-Dae, Chun, Sung-Duck, Park, Sung-Jun, Yi, Seung-June
• Primary Examiner(s): LE, DIEU MINH T
• Application Number:
  US12/665,243
• Publication Number:
  US 20100325504A1
• Time in Patent Office: 1,784 Days
• Field of Search: 714/748, 714/749, 714/750
• US Class Current: 714/749
• 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:

receiving control information and/or data for the broadcast or multicast service via an MCH (Multicast Channel);

transmitting a negative acknowledgement to a base station when the control information and/or data fail to be received via the MCH; and

receiving the control information and/or data via a DL-SCH (Downlink Shared Channel),

wherein retransmission for the control information and/or data is performed via the DL-SCH by an HARQ (Hybrid Automatic Repeat request) entity in an MAC (Media Access Control) layer when the control information and/or data fail to be received via the DL-SCH.

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

3. The method of claim 2, wherein the MBMS control information is carried using an RRC (Radio Resource Control) message.

4. The method of claim 1, further comprising:

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

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

transmitting control information and/or data for the broadcast or multicast service to a terminal via an MCH (Multicast Channel);

receiving a negative acknowledgement for the control information and/or data transmitted via the MCH; and

transmitting the control information and/or data via a DL-SCH (Downlink Shared Channel),

wherein retransmission for the control information and/or data is performed via the DL-SCH by an HARQ (Hybrid Automatic Repeat request) entity in an MAC (Media Access Control) layer when the control information and/or data fail to be received via the DL-SCH.

6. The method of claim 5, wherein the control information for the broadcast or multicast service corresponds to an MCCH (Multicast Control Channel) for MBMS (Multimedia Broadcast Multicast Service) control information, and the data for the broadcast or multicast service corresponds to an MTCH (Multicast Traffic Channel) for user data of the MBMS.

7. The method of claim 6, wherein the MBMS control information is carried using an RRC (Radio Resource Control) message.

8. The method of claim 5, further comprising:

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

9. A terminal having a MAC layer, comprising:

an HARQ (Hybrid Automatic Repeat Request) entity that receives at least one PDU (Protocol Data Unit) of a broadcast or multicast service from a base station via a DL-SCH (Downlink Shared Channel) when the at least one PDU fails to be received via an MCH (Multicast Channel),

wherein retransmission for the at least one PDU is performed via the DL-SCH by the HARQ entity when the at least one PDU fails to be received via the DL-SCH;

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

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

10. A terminal, comprising:

a transmission/reception unit; and

a controller configured to

receive control information and/or data for the broadcast or multicast service via an MCH (Multicast Channel),

transmit a negative acknowledgement to a base station when the control information and/or data fail to be received via the MCH, and

receive the control information and/or data via a DL-SCH (Downlink Shared Channel),

wherein retransmission for the control information and/or data is performed via the DL-SCH by an HARQ (Hybrid Automatic Repeat request) entity in an MAC (Media Access Control) layer when the control infoimation and/or data fail to be received via the DL-SCH.