Method and user equipment for receiving signal and method and base station for transmitting signal

• US 9,756,656 B2
• Filed: 01/09/2014
• Issued: 09/05/2017
• Est. Priority Date: 01/09/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: You, Hyangsun, Yi, Yunjung, Ahn, Joonkui, Seo, Dongyoun
• Primary Examiner(s): DAYA, TEJIS A
• Application Number:
  US14/430,730
• Publication Number:
  US 20150257173A1
• Time in Patent Office: 1,335 Days
• Field of Search: None
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• 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 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present invention provides a method and an apparatus for reducing the amount of upper layer signals. Also, the present invention provides a method and an apparatus comprising: defining a new identifier for transmitting an upper layer signal for user equipment in a specific mode; and transmitting the upper layer signal by means of scrambling by using the new identifier, transmitting along with an error detection sign by using the new identifier, transmitting by using a user equipment-specific reference signal by using the new identifier, or transmitting based on control information transmitted by using the new identifier.

Claims

1. A method for receiving, by a user equipment, a signal, the method comprising:

receiving, by the user equipment, a physical broadcast channel (PBCH) carrying a master information block; and

receiving, by the user equipment, a legacy physical downlink shared channel (PDSCH) carrying a legacy system information block based on downlink control information carried by a physical downlink control channel (PDCCH) when the user equipment is not in coverage enhancement, and receiving, by the user equipment, an enhanced PDSCH carrying an enhanced system information block in each of consecutive downlink subframes based on the master information block when the user equipment is in the coverage enhancement,

wherein the master information block includes information on a time-frequency resource for reception of the enhanced PDSCH and information on a starting subframe of the consecutive downlink subframes.

2. The method according to claim 1, wherein the master information block further includes information on a downlink bandwidth, information on a physical hybrid ARQ indicator channel (PHICH) configuration and information on a system frame number.

3. The method according to claim 1, wherein the legacy or enhanced system information block is system information block type 1 (SIB1) which contains information relevant when evaluating whether the user equipment is allowed to access a cell and defines scheduling of other system information.

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

determining, by the user equipment, whether the user equipment is in coverage enhancement based on whether the user equipment receives a synchronization signal successfully within a predefined time duration.

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

receiving, by the user equipment, the PBCH in an additional subframe as well as in subframe 0 of subframes 0 to 9 in each radio frame when the user equipment is in the coverage enhancement.

6. A user equipment for receiving a signal, the user equipment comprising:

a radio frequency (RF) unit, and

a processor configured to control the RF unit to;

receive a physical broadcast channel (PBCH) carrying a master information block; and

receive a legacy physical downlink shared channel (PDSCH) carrying a legacy system information block based on downlink control information carried by a physical downlink control channel (PDCCH) when the user equipment is not in coverage enhancement, and receive an enhanced PDSCH carrying an enhanced system information block in each of consecutive downlink subframes based on the master information block when the user equipment is in the coverage enhancement,

wherein the master information block includes information on a time-frequency resource for reception of the enhanced PDSCH and information on a starting subframe of the consecutive downlink subframes.

7. The user equipment according to claim 6, wherein the master information block further includes information on a downlink bandwidth, information on a physical hybrid ARQ indicator channel (PHICH) configuration and information on a system frame number.

8. The user equipment according to claim 6, wherein the legacy or enhanced system information block is system information block type 1 (SIB1) which contains information relevant when evaluating whether the user equipment is allowed to access a cell and defines scheduling of other system information.

9. The user equipment according to claim 6, wherein the processor is further configured to determine whether the user equipment is in the coverage enhancement based on whether the user equipment receives a synchronization signal successfully within a predefined time duration.

10. The user equipment according to claim 6, wherein the processor is further configured to control the RF unit to receive the PBCH in an additional subframe as well as in subframe 0 of subframes 0 to 9 in each radio frame when the user equipment is in the coverage enhancement.

11. A method for transmitting, by a base station, a signal, the method comprising:

transmitting, by the base station, a physical broadcast channel (PBCH) carrying a master information block;

transmitting, by the base station, a physical downlink control channel (PDCCH) carrying downlink control information; and

transmitting, by the base station, a legacy physical downlink shared channel (PDSCH) carrying a legacy system information block based on the downlink control information, and transmitting, by the base station, an enhanced PDSCH carrying an enhanced system information block in each of consecutive downlink subframes based on the master information block,

wherein the legacy system information block is for a user equipment not in coverage enhancement and the enhanced system information block is for a user equipment in the coverage enhancement, and

wherein the master information block includes information on a time-frequency resource for reception of the enhanced PDSCH and information on a starting subframe of the consecutive downlink subframes.

12. The method according to claim 11, wherein the master information block further includes information on a downlink bandwidth, information on a physical hybrid ARQ indicator channel (PHICH) configuration and information on a system frame number.

13. The method according to claim 11, wherein the legacy or enhanced system information block is system information block type 1 (SIB1) which contains information relevant when evaluating whether the user equipment is allowed to access a cell and defines scheduling of other system information.

14. The method according to claim 11, further comprising:

transmitting, by the base station, the PBCH in an additional subframe for the user equipment in the coverage enhancement as well as in subframe 0 of subframes 0 to 9 in each radio frame.

15. A base station for transmitting a signal, the base station comprising:

a radio frequency (RF) unit, and

a processor configured to control the RF unit to;

transmit a physical broadcast channel (PBCH) carrying a master information block;

transmit a physical downlink control channel (PDCCH) carrying downlink control information; and

transmit a legacy physical downlink shared channel (PDSCH) carrying a legacy system information block based on the downlink control information, and transmit an enhanced PDSCH carrying an enhanced system information block in each of consecutive downlink subframes based on the master information block,

wherein the legacy system information block is for a user equipment not in coverage enhancement and the enhanced system information block is for a user equipment in the coverage enhancement, and

wherein the master information block includes information on a time-frequency resource for reception of the enhanced PDSCH and information on a starting subframe of the consecutive downlink subframes.

16. The base station according to claim 15, wherein the master information block further includes information on a downlink bandwidth, information on a physical hybrid ARQ indicator channel (PHICH) configuration and information on a system frame number.

17. The base station according to claim 15, wherein the legacy or enhanced system information block is system information block type 1 (SIB1) which contains information relevant when evaluating whether the user equipment is allowed to access a cell and defines scheduling of other system information.

18. The base station according to claim 15, wherein the processor is further configured to control the RF unit to transmit the PBCH in an additional subframe for the user equipment in the coverage enhancement as well as in subframe 0 of subframes 0 to 9 in each radio frame.