Method of user equipment searching for control information in multi-node system and apparatus using the same

Patent metadata

Field	Value
Publication number	US-9344231-B2
Application number	US-201214232088-A
Country	US
Kind code	B2
Filing date	Jul 11, 2012
Priority date	Jul 12, 2011
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

There are provided a method of user equipment searching for control information and an apparatus using the same. The method includes receiving information about the position of an Enhanced-Physical Control Format Indication Channel (E-PCFICH) from a base station, receiving an E-PCFICH based on the information about the position of the E-PCFICH, obtaining information about the frequency band of an Enhanced Physical Downlink Control Channel (E-PDCCH) region through the E-PCFICH, and searching the E-PDCCH region for an E-PDCCH for the user equipment, wherein the E-PCFICH is transmitted in an OFDM symbol between a Physical Downlink Control Channel (PDCCH), transmitted in the first N (N is one of natural numbers 1 to 4) Orthogonal Frequency Division Multiplexing (OFDM) symbols of a subframe in the time domain, and the E-PDCCH region.

First claim

The invention claimed is:

1. A method for receiving control information in a wireless communication system, the method comprising:
receiving, by a user equipment (UE), first information related to a position of an Enhanced-Physical Control Format Indication Channel (E-PCFICH) from a base station;
receiving, by the UE, the E-PCFICH based on the first information related to the position of the E-PCFICH;
obtaining, by the UE, second information related to a frequency band of an Enhanced Physical Downlink Control Channel (E-PDCCH) region through the E-PCFICH; and
searching, by the UE, the E-PDCCH region for an E-PDCCH based on the second information,
wherein the E-PCFICH is received in an orthogonal frequency division multiplexing (OFDM) symbol between a Physical Downlink Control Channel (PDCCH) and the E-PDCCH region,
wherein the PDCCH is received in first N OFDM symbols of a subframe in a time domain,
wherein N is one of natural numbers 1 to 4,
wherein the first information related to the position of the E-PCFICH is semi-statically configured, and
wherein the second information related to the frequency band of the E-PDCCH region is dynamically changed for each subframe.

2. The method of claim 1 , wherein the E-PDCCH region is any one of a plurality of E-PDCCH regions allocated to different frequency bands in a frequency domain of the subframe.

3. The method of claim 1 , wherein the E-PCFICH exists in a specific position of resource blocks forming the E-PDCCH region.

4. The method of claim 1 , wherein the E-PCFICH includes third information related to a number of resource blocks forming the E-PDCCH region.

5. The method of claim 1 , wherein the second information indicates a frequency band for one E-PDCCH region.

6. The method of claim 1 , wherein the second information indicates a plurality of frequency bands for a plurality of E-PDCCH regions.

7. The method of claim 1 , wherein the E-PDCCH region includes fourth information related to a scheduling of data transmitted in any one of a plurality of nodes controlled by the base station.

8. The method of claim 1 , wherein the E-PDCCH region is started from an OFDM symbol fixed in the subframe.

9. A user equipment comprising:
a memory: and
a processor coupled to the memory, the processor configured to:
receive first information related to a position of an Enhanced-Physical Control Format Indication Channel (E-PCFICH) from a base station,
receive the E-PCFICH based on the first information related to the position of the E-PCFICH,
obtain second information related to a frequency band of an Enhanced Physical Downlink Control Channel (E-PDCCH) region through the E-PCFICH, and
search the E-PDCCH region for an E-PDCCH based on the second information,
wherein the E-PCFICH is received in an orthogonal frequency division multiplexing (OFDM) symbol between a Physical Downlink Control Channel (PDCCH) and the E-PDCCH region,
wherein the PDCCH is received in first N OFDM symbols of a subframe in a time domain,
wherein N is one of natural numbers 1 to 4,
wherein the first information related to the position of the E-PCFICH is semi-statically configured, and
wherein the second information related to the frequency band of the E-PDCCH region is dynamically changed for each subframe.

10. The user equipment of claim 9 , wherein the E-PDCCH region is any one of a plurality of E-PDCCH regions allocated to different frequency bands in a frequency domain of the subframe.

Assignees

• Kang Ji Won
• Chun Jin Young
• Kim Ki Tae
• Kim Su Nam
• Ihm Bin Chul
• Park Sung Ho
• Lg Electronics Inc

Inventors

• Kang Ji Won
• Chun Jin Young
• Kim Ki Tae
• Kim Su Nam
• Ihm Bin Chul
• Park Sung Ho

Classifications

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L1/0091

  arrangements specific to receivers, e.g. format detection (detection of data rate H04L25/0262; detection of coding rate H04L1/0046) · CPC title

• H04L5/0007 Primary

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title