Method for transmitting downlink control channel by base station in wireless communication system, and device therefor

Patent metadata

Field	Value
Publication number	US-9877313-B2
Application number	US-201214360584-A
Country	US
Kind code	B2
Filing date	Jun 15, 2012
Priority date	Nov 25, 2011
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

Disclosed is a method for transmitting a downlink control channel by a base station in a wireless communication system. More particularly, the method comprises the following steps: setting a transmission resource for transmitting the downlink control channel in a data area of a subframe; mapping one or more first control channels for downlink acknowledgement(ACK)/negative-ACK(NACK) information to the transmission resource; and transmitting the mapped one or more first control channels, wherein the one or more first control channels are mapped to a location adjacent to a terminal specific reference signal existing in the transmission resource.

First claim

The invention claimed is:

1. A method for transmitting a downlink control channel by a base station in a wireless communication system, the method comprising:
mapping one or more enhanced Physical Hybrid-ARQ Indicator Channels (E-PHICHs) including acknowledgment (ACK)/negative ACK (NACK) information for uplink Hybrid-ARQ in a data region of a subframe,
wherein the one or more E-PHICHs are mapped only to a set of Orthogonal Frequency Division Multiple (OFDM) symbols where User Equipment specific Reference Signals (UE-specific RSs) are mapped, and
wherein the set of OFDM symbols consist of two consecutive OFDM symbols in the data region starting from an Nth (N>1) OFDM symbol in the subframe; and
mapping one or more enhanced Physical Downlink Control Channels (E-PDCCHs) including downlink control information in the data region of the subframe; and
transmitting the mapped one or more E-PHICHs and the mapped one or more E-PDCCHs,
wherein the one or more E-PHICHs are transmitted through a preset antenna port, and
wherein the one or more E-PDCCHs are transmitted through antenna ports different from the preset antenna port.

2. The method according to claim 1 ,
wherein one of the one or more E-PHICHs is demodulated by a UE based on the preset antenna port, and
wherein one of the one or more E-PDCCHs is demodulated by the UE based on a specific antenna port that varies among the antenna ports different from the preset antenna port.

3. A base station apparatus in a wireless communication system, the apparatus comprising:
a radio frequency unit; and
a processor operatively connected to the radio frequency unit, the processor arranged to:
map one or more enhanced Physical Hybrid-ARQ Indicator Channels (E-PHICHs) including acknowledgment (ACK)/negative ACK (NACK) information for uplink Hybrid-ARQ in a data region of a subframe,
wherein the one or more E-PHICHs are mapped only to a set of Orthogonal Frequency Division Multiple (OFDM) symbols where User Equipment specific Reference Signals (UE-specific RSs) are mapped, and
wherein the set of OFDM symbols consist of two consecutive OFDM symbols in the data region starting from an Nth (N>1) OFDM symbol in the subframe; and
map one or more enhanced Physical Downlink Control Channels (E-PDCCHs) including downlink control information in the data region of the subframe; and
transmit the mapped one or more E-PHICHs and the mapped one or more E-PDCCHs,
wherein the one or more E-PHICHs are transmitted through a preset antenna port, and
wherein the one or more E-PDCCHs are transmitted through antenna ports different from the preset antenna port.

4. The base station apparatus according to claim 3 ,
wherein one of the one or more E-PHICHs is demodulated by a UE based on the preset antenna port, and
wherein one of the one or more E-PDCCHs is demodulated by the UE based on a specific antenna port that varies among the antenna ports different from the preset antenna port.

Assignees

• Kim Kitae
• Chun Jinyoung
• Noh Minseok
• Ko Hyunsoo
• Chung Jaehoon
• Kim Sunam
• Kang Jiwon
• Ihm Binchul
• Park Sungho
• Lg Electronics Inc

Inventors

• Kim Kitae
• Chun Jinyoung
• Noh Minseok
• Ko Hyunsoo
• Chung Jaehoon
• Kim Sunam
• Kang Jiwon
• Ihm Binchul
• Park Sungho

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0051 Primary

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L5/0037

  Inter-user or inter-terminal allocation · CPC title

• H04L1/1861

  Physical mapping arrangements (for ACK signaling see also H04L5/0053) · CPC title