Method and apparatus for allocating control channel in wireless communication system

• US 9,853,789 B2
• Filed: 12/07/2016
• Issued: 12/26/2017
• Est. Priority Date: 10/26/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Jin Young, Ihm, Bin Chul, Kang, Ji Won, Kim, Ki Tae, Park, Sung Ho, Kim, Su Nam
• Primary Examiner(s): Mesfin, Yemane
• Assistant Examiner(s): Baron, Henry
• Application Number:
  US15/372,100
• Publication Number:
  US 20170093535A1
• Time in Patent Office: 384 Days
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04B 7/0684 using different training sequences per antenna
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0041 Frequency-non-contiguous
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• 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 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

Provided are a method and an apparatus for allocating a control channel in a wireless communication system. A base station allocates an enhanced physical downlink control channel (e-PDCCH) to a localized region within a physical downlink shared channel (PDSCH) region, allocates the e-PDCCH to a distributed region within the PDSCH region, and transmits a scheduling assignment via the allocated e-PDCCH.

Claims

1. A method for allocating, by a base station (BS), a control channel in a wireless communication system, the method comprising:

allocating an enhanced physical downlink control channel (e-PDCCH) to a localized region which is contiguously configured in a frequency domain or a distributed region which is dispersedly configured in the frequency domain; and

transmitting a scheduling assignment through the allocated e-PDCCH,

wherein the e-PDCCH is allocated only to the distributed region when an e-PDCCH format with a highest aggregation level, among a plurality of predetermined aggregation levels, is configured, and

wherein the e-PDCCH format with the highest aggregation level corresponds to an e-PDCCH format 4.

2. The method of claim 1,

wherein the e-PDCCH is allocated by using an aggregation of at least one enhanced control channel element (e-CCE),

wherein each e-CCE includes a plurality of enhanced resource element groups (e-REGs).

3. The method of claim 1,

wherein the localized region is a region in which the e-PDCCH is allocated only to one physical resource block (PRB) or a PRB pair,

wherein the distributed region is a region in which the e-PDCCH is allocated to multiple PRBs or multiple PRB pairs.

4. The method of claim 1, wherein an aggregation level of the e-PDCCH which is allocated to the distributed region is higher than an aggregation level of the e-PDCCH which is allocated to the localized region.

5. The method of claim 1, wherein the scheduling assignment is transmitted through a common search space (CSS) of the e-PDCCH which is allocated to the distributed region.

6. The method of claim 5, wherein the scheduling assignment includes a common radio network temporary identity (RNTI).

7. The method of claim 5, wherein the scheduling assignment which is transmitted through the e-PDCCH allocated to the distributed region is a downlink control information (DCI) format 1A.

8. A base station (BS) in a wireless communication system, the BS comprising:

a memory;

a radio frequency (RF) unit; and

a processor coupled to the memory, and the RF unit,

wherein the processor is configured to;

allocate an enhanced physical downlink control channel (e-PDCCH) to a localized region which is contiguously configured in a frequency domain or a distributed region which is dispersedly configured in the frequency domain,

control the RF unit to transmit a scheduling assignment through the allocated e-PDCCH,

wherein the e-PDCCH is allocated only to the distributed region when an e-PDCCH format with a highest aggregation level, among a plurality of predetermined aggregation levels, is configured, and

wherein the e-PDCCH format with the highest aggregation level corresponds to an e-PDCCH format 4.

9. A method for receiving, by a user equipment (UE), a scheduling assignment in a wireless communication system, the method comprising:

receiving an enhanced physical downlink control channel (e-PDCCH) to a localized region which is contiguously configured in a frequency domain or a distributed region which is dispersedly configured in the frequency domain; and

receiving a scheduling assignment through the allocated e-PDCCH,

wherein the e-PDCCH is allocated only to the distributed region when an e-PDCCH format with a highest aggregation level, among a plurality of predetermined aggregation levels, is configured, and

wherein the e-PDCCH format with the highest aggregation level corresponds to an e-PDCCH format 4.

10. The method of claim 9,

wherein the e-PDCCH is allocated by using an aggregation of at least one enhanced control channel element (e-CCE),

wherein each e-CCE includes a plurality of enhanced resource element groups (e-REGs).

11. The method of claim 9,

wherein the localized region is a region in which the e-PDCCH is allocated only to one physical resource block (PRB) or a PRB pair,

wherein the distributed region is a region in which the e-PDCCH is allocated to multiple PRBs or multiple PRB pairs.

12. The method of claim 9, wherein an aggregation level of the e-PDCCH which is allocated to the distributed region is higher than an aggregation level of the e-PDCCH which is allocated to the localized region.