METHOD AND APPARATUS FOR PROVIDING MBMS SERVICE FOR LOW COMPLEXITY USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM

• US 20180020426A1
• Filed: 01/26/2016
• Published: 01/18/2018
• Est. Priority Date: 01/26/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Yunjung
• Granted Patent: US 10,645,675 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• 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 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus for providing a multimedia broadcast multicast service (MBMS) service for a low-complexity user equipment (UE) in a wireless communication system is provided. In one embodiment, a UE requiring coverage enhancement receives information on repetition for coverage enhancement, and receives the MBMS service according to the information repetition for coverage enhancement.

Claims

1. A method for receiving, by a user equipment (UE) requiring coverage enhancement, a multimedia broadcast multicast service (MBMS) service in a wireless communication system, the method comprising:

receiving information on repetition for coverage enhancement; and

receiving the MBMS service according to the information repetition for coverage enhancement.

2. The method of claim 1, wherein the information on repetition for coverage enhancement corresponds to a repetition number for each physical multicast channel (PMCH) or multicast traffic channel (MTCH).

3. The method of claim 2, wherein the repetition number is included in a multicast-broadcast single-frequency network (MBSFN) area information.

4. The method of claim 1, wherein the information on repetition for coverage enhancement corresponds to a multicast control channel (MCCH) modification period based on the repetition for coverage enhancement, which is larger than a MCCH modification period for a UE not requiring CE.

5. The method of claim 4, wherein multiple MCCHs are aggregated in the MCCH modification period based on the repetition for coverage enhancement.

6. The method of claim 1, wherein the information on repetition for coverage enhancement corresponds to a multicast channel (MCH) scheduling period based on the repetition for coverage enhancement, which is larger than a MCH scheduling period for a UE not requiring CE.

7. The method of claim 1, further comprising receiving a system information block including a MBMS configuration per each subband.

8. The method of claim 7, wherein the MBMS service is received per each subband.

9. A method for providing, by a base station (BS), a multimedia broadcast multicast service (MBMS) service in a wireless communication system, the method comprising:

multiplexing a subband physical multicast channel (PMCH) with a physical downlink shared channel (PDSCH) in a subframe; and

transmitting the MBMS service to a user equipment (UE) requiring coverage enhancement (CE) in the subframe,

wherein the subband PMCH is a PMCH allocated to a smaller bandwidth than a system bandwidth for the UE requiring CE.

10. The method of claim 9, wherein the subframe is a normal subframe.

11. The method of claim 9, wherein the subband PMCH and the PDSCH are multiplexed by a frequency division multiplexing (FDM).

12. The method of claim 9, further comprising transmitting a demodulation reference signal (DM-RS) or a cell-specific reference signal (CRS) for transmitting the MBMS service to the UE requiring CE.

13. The method of claim 12, further comprising configuring a cell identifier (ID) or a scrambling ID for scrambling the DM-RS or the CRS.

14. The method of claim 13, wherein the cell ID or the scrambling ID is configured per each multicast-broadcast single-frequency network (MBSFN) area or per each PMCH configuration.