Method and apparatus for transmitting control information in wireless communication system

• US 10,244,517 B2
• Filed: 11/13/2012
• Issued: 03/26/2019
• Est. Priority Date: 11/13/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Inkwon, Seo, Hanbyul, Kim, Hakseong
• Primary Examiner(s): Divito, Walter J
• Assistant Examiner(s): Luo, Anthony
• Application Number:
  US14/358,007
• Publication Number:
  US 20140307700A1
• Time in Patent Office: 2,324 Days
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• 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: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method for enabling a base station to transmit control information in a wireless communication system according to one embodiment of the present invention, comprises a step of transmitting an enhanced physical downlink channel (E-PDCCH) for a terminal using at least one physical resource block pair among a plurality of physical resource block pairs for transmitting the E-PDCCH, wherein the plurality of physical resource block pairs include one or more physical resource block pair sets, and a parameter related to a demodulation reference signal for the E-PDCCH is set with respect to each physical resource block pair set.

Claims

1. A method for transmitting control information by a base station in a wireless communication system, the method comprising:

transmitting an enhanced physical downlink channel (E-PDCCH) to a user equipment, using at least one or more physical resource block (PRB) pairs among a plurality of PRB pairs for E-PDCCH transmission,

wherein the plurality of PRB pairs include one or more PRB pair sets,

wherein one or more initial values of a scrambling sequence used to generate a demodulation reference signal (DMRS) for the E-PDCCH are respectively configured for the one or more PRB pair sets,

wherein, if the E-PDCCH is related to a localized transmission, each antenna port of plurality of antenna ports is allocated to enhanced control channel elements (eCCEs) in the one or more PRB pairs, and

wherein, if the E-PDCCH is related to a distributed transmission, two antenna ports are allocated in an alternating manner to enhanced resource element groups (eREGs) in the one or more PRB pairs.

2. The method according to claim 1, wherein the plurality of PRB pairs include a minimum of four resource units for transmitting the E-PDCCH.

3. The method according to claim 1, wherein only partial antenna ports among preset antenna ports for the PRB pairs are used when resources available for the E-PDCCH in the physical resource pairs decreases.

4. The method according to claim 1, wherein the two antenna ports used in the distributed transmission are also available in the localized transmission.

5. A base station in a wireless communication system, the base station comprising:

a transmission module; and

a processor,

wherein the processor transmits an enhanced physical downlink channel (E-PDCCH) to a user equipment, using at least one or more physical resource block (PRB) pairs among a plurality of PRB pairs for E-PDCCH transmission,

wherein the plurality of PRB pairs include one or more PRB pair sets,

wherein one or more initial values of a scrambling sequence used to generate a demodulation reference signal (DMRS) for the E-PDCCH are respectively configured for the one or more PRB pair sets,

wherein, if the E-PDCCH is related to a localized transmission, each antenna port of plurality of antenna ports is allocated to enhanced control channel elements (eCCEs) in the one or more PRB pairs, and

wherein, if the E-PDCCH is related to a distributed transmission, two antenna ports are allocated in an alternating manner to enhanced resource element groups (eREGs) in the one or more PRB pairs.

6. The base station according to claim 5, wherein the two antenna ports used in the distributed transmission are also available in the localized transmission.