Method for receiving or transmitting broadcast signal in wireless communication system and apparatus therefor

• US 9,900,863 B2
• Filed: 08/30/2013
• Issued: 02/20/2018
• Est. Priority Date: 09/16/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Jihyun, Lee, Seungmin, Seo, Hanbyul
• Primary Examiner(s): HAILE, FEBEN
• Application Number:
  US14/421,118
• Publication Number:
  US 20150373668A1
• Time in Patent Office: 1,635 Days
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/008 once only, on installation
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for receiving a broadcast signal through a new carrier type (NCT) in a wireless communication system according to one embodiment of the present invention is executed by a terminal and comprises the steps of: blind-decoding a physical broadcast channel (PBCH) received from a base station; and acquiring a number of antenna ports and system information of the base station from the PBCH, wherein the blind decoding is executed within a candidate range for the blind decoding of the PBCH corresponding to a partial area of a downlink subframe, and the candidate range is an area in which a symbol section is excluded in a downlink subframe to which a physical downlink control channel (PDDCH) of a neighboring base station is mapped, and can be indicated by the base station in advance.

Claims

1. A method for receiving a broadcast signal through a new carrier type (NCT) cell in a wireless communication system, the method being performed by a user equipment and comprising:

blind-decoding a physical broadcast channel (PBCH) on the NCT cell in a plurality of candidate PBCH resources which respectively correspond to a partial area of a downlink subframe, the PBCH being transmitted from a base station; and

acquiring the number of antenna ports and system information of the base station from the PBCH,

wherein each of the candidate PBCH resources includes a resource region from which symbols of the downlink subframe to which a physical downlink control channel (PDCCH) of a neighboring base station is mapped are excluded, and is indicated by the base station in advance,

wherein the each of the candidate PBCH resources is specified by a starting symbol index to which the PBCH is mapped, a number of resource blocks to which the PBCH is mapped, and a last symbol index to which the PBCH is mapped, and

wherein the number of resource blocks and the last symbol index are determined in accordance with the starting symbol index.

2. The method according to claim 1, wherein the PBCH is mapped to one or more symbols of the downlink subframe, and the one or more symbols are determined on a basis of one or more symbols to which a primary synchronization signal/secondary synchronization signal (PSS/SSS) is mapped.

3. The method according to claim 1, further comprising:

receiving an enhanced PDCCH (EPDCCH) in the downlink subframe by using the acquired system information, wherein if the PBCH is transmitted in the downlink subframe, a starting symbol index of a search space for the EPDCCH is the same as the starting symbol index to which the PBCH is mapped, or is determined ahead or behind as much as a certain number of symbols from the starting symbol index to which the PBCH is mapped.

4. The method according to claim 3, wherein the starting symbol index of the search space for the EPDCCH is indicated by specific information included in the PBCH.

5. A method for transmitting a broadcast signal through a new carrier type (NCT) cell in a wireless communication system, the method being performed by a base station and comprising:

receiving, by the base station, information on symbols of a downlink subframe, to which a physical downlink control channel (PDCCH) of a neighboring base station is mapped, from the neighboring base station;

allocating, by the base station, a physical broadcast channel (PBCH) in one of a plurality of candidate PBCH resources which respectively correspond to a partial area of a downlink subframe based on the information received from the neighboring base station; and

transmitting, by the base station, the PBCH to the user equipment,

wherein each of the candidate PBCH resources includes a resource region from which symbols of the downlink subframe to which the PDCCH of the neighboring base station is mapped are excluded, and is indicated to the user equipment in advance,

wherein the each of the candidate PBCH resources is specified by a starting symbol index to which the PBCH is mapped, a number of resource blocks to which the PBCH is mapped, and a last symbol index to which the PBCH is mapped, and

wherein the number of resource blocks and the last symbol index are determined in accordance with the starting symbol index.

6. The method according to claim 5, wherein the PBCH is mapped to one or more symbols of the downlink subframe, and the one or more symbols are determined on a basis of one or more symbols to which a primary synchronization signal/secondary synchronization signal (PSS/SSS) is mapped.

7. The method according to claim 5, further comprising transmitting an enhanced PDCCH (EPDCCH) in the downlink subframe, wherein if the PBCH is transmitted in the downlink subframe, a starting symbol index of a search space for the EPDCCH is the same as the starting symbol index to which the PBCH is mapped, or is determined ahead or behind as much as a certain number of symbols from the starting symbol index to which the PBCH is mapped.

8. The method according to claim 7, wherein the starting symbol index of the search space for the EPDCCH is indicated by specific information included in the PBCH.

9. A user equipment configured to receive a broadcast signal through a new carrier type (NCT) cell in a wireless communication system, the user equipment comprising:

a radio frequency (RF) unit; and

a processor configured to control the RF unit,

wherein the processor is configured to perform blind-decoding for a physical broadcast channel (PBCH) on the NCT cell in a plurality of candidate PBCH resources which respectively correspond to a partial area of a downlink subframe, the PBCH being transmitted from a base station and acquire the number of antenna ports and system information of the base station from the PBCH,

wherein each of the candidate PBCH resources includes a resource region from which symbols of the downlink subframe to which a physical downlink control channel (PDCCH) of a neighboring base station are mapped is excluded, and is indicated by the base station in advance,

wherein the each of the candidate PBCH resources is specified by a starting symbol index to which the PBCH is mapped, a number of resource blocks to which the PBCH is mapped, and a last symbol index to which the PBCH is mapped, and

wherein the number of resource blocks and the last symbol index are determined in accordance with the starting symbol index.

10. A base station configured to transmit a broadcast signal through a new carrier type (NCT) cell in a wireless communication system, the base station comprising:

a radio frequency (RF) unit; and

a processor configured to control the RF unit,

wherein the processor is configured to receive information on symbols of a downlink subframe, to which a physical downlink control channel (PDCCH) of a neighboring base station is mapped, from the neighboring base station, allocate a physical broadcast channel (PBCH) in one of a plurality of candidate PBCH resources which respectively correspond to a partial area of a downlink subframe based on the information received from the neighboring base station and transmit the PBCH to the user equipment, and

wherein each of the candidate PBCH resources includes a resource region from which symbols of the downlink subframe to which the PDCCH of the neighboring base station is mapped are excluded, and is indicated to the user equipment in advance,

wherein the each of the candidate PBCH resources is specified by a starting symbol index to which the PBCH is mapped, a number of resource blocks to which the PBCH is mapped, and a last symbol index to which the PBCH is mapped, and

wherein the number of resource blocks and the last symbol index are determined in accordance with the starting symbol index.