# US 2014/0192759 A1 · Method of indicating a control channel in a wireless access system, base station for the same and user equipment for the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192759 A1 - Document ID: US20140192759A1 - Status: Published application - Kind: A1 - Application number: 14/238,145 - Filed: 2012-09-03 - Published: 2014-07-10 - Earliest claimed: 2011-09-05 - Assignees: LG Electronics Inc. - Inventors: Hyukmin Son; Jinmin Kim; Seunghee Han; Hyunwoo Lee; Hyeyoung Choi - Web page: https://patentgrep.com/patent/US20140192759A1 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/27: between access points - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Disclosed are a method of transmitting a control channel in a wireless access system and a base station for the same. In transmitting a control channel of a 1st base station in a wireless communication system, the present invention includes receiving E-PDCCH (enhanced-physical downlink control channel) including a downlink scheduling information in a data region from a 2nd base station, assigning E-PDCCH including a downlink scheduling information of the 1st base station to the data region based on the downlink scheduling information received from the 2nd base station, and transmitting the downlink scheduling information of the 1st base station to the 2nd base station. ## Claims ### Claim 1 In transmitting a control channel of a 1st base station in a wireless communication system, a method of transmitting the control channel, comprising the steps of: receiving E-PDCCH (enhanced-physical downlink control channel) including a downlink scheduling information in a data region from a 2nd base station; assigning E-PDCCH including a downlink scheduling information of the 1st base station to the data region based on the downlink scheduling information received from the 2nd base station; and transmitting the downlink scheduling information of the 1st base station to the 2nd base station. ### Claim 2 (depends on 1) The method of claim 1, wherein the E-PDCCH of the 1st base station is assigned to the data region in a manner of being orthogonal to a resource having the E-PDCCH of the 2nd base station assigned thereto. ### Claim 3 (depends on 1) The method of claim 1, wherein the downlink scheduling information from the 2nd base station is received as a bitmap of a resource block unit in frequency domain or a bitmap of a slot or subframe unit in time domain. ### Claim 4 (depends on 1) The method of claim 1, wherein in the resource having the E-PDCCH of the 2nd base station assigned thereto, the E-PDCCH of the 1st base station is muted instead of being assigned or a user equipment capable of data reception with a low power is scheduled. ### Claim 5 (depends on 1) The method of claim 1, wherein if both of the 1st base station and the 2nd base station are macro base stations, user equipments are located in outer areas of the 1st and 2nd base stations. ### Claim 6 (depends on 1) The method of claim 1, wherein if the 1st base station and the 2nd base station comprise a macro base station and a pico base station, respectively, a pico base station based user equipment is located in an outer area of the pico base station and a macro base station based user equipment is located within the pico base station. ### Claim 7 In transmitting a control channel of a 1st base station in a wireless communication system, a method of transmitting the control channel, comprising the steps of: receiving a semi-static ABRB (almost blank RB) pattern for E-PDCCH (enhanced-physical downlink control channel) of a 2nd base station containing a downlink scheduling information in a data region by RRC (radio resource control); and assigning E-PDCCH containing a downlink scheduling information of the 1st base station to a corresponding blank data region resource based on the ARBR (almost blank resource block) pattern from the 2nd base station. ### Claim 8 (depends on 7) The method of claim 7, wherein the 1st base station comprises a macro base station, wherein the 2nd base station comprises a femto base station, and wherein a macro base user equipment is located within the femto base station. ### Claim 9 A 1st base station, of which control channel is transmitted in a wireless communication system, comprising: a radio frequency unit; and a processor configured to control the radio frequency unit, the processor controlling the radio frequency unit to receive E-PDCCH (enhanced-physical downlink control channel) including a downlink scheduling information in a data region from a 2nd base station, the processor assigning E-PDCCH including a downlink scheduling information of the 1st base station to the data region based on the downlink scheduling information received from the 2nd base station, the processor controlling the radio frequency unit to transmit the downlink scheduling information of the 1st base station to the 2nd base station. ### Claim 10 (depends on 9) The 1st base station of claim 9, wherein the processor assigns the E-PDCCH of the 1st base station to the data region in a manner that the E-PDCCH of the 1st base station is orthogonal to a resource having the E-PDCCH of the 2nd base station assigned thereto. ### Claim 11 (depends on 9) The 1st base station of claim 9, wherein the downlink scheduling information from the 2nd base station is received as a bitmap of a resource block unit in frequency domain or a bitmap of a slot or subframe unit in time domain. ### Claim 12 (depends on 9) The 1st base station of claim 9, wherein in the resource having the E-PDCCH of the 2nd base station assigned thereto, the E-PDCCH of the 1st base station is muted instead of being assigned or a user equipment capable of data reception with a low power is scheduled. ### Claim 13 (depends on 9) The 1st base station of claim 9, wherein if both of the 1st base station and the 2nd base station are macro base stations, user equipments are located in outer areas of the 1st and 2nd base stations. ### Claim 14 (depends on 9) The 1st base station of claim 9, wherein if the 1st base station and the 2nd base station comprise a macro base station and a pico base station, respectively, a pico base station based user equipment is located in an outer area of the pico base station and a macro base station based user equipment is located within the pico base station. ### Claim 15 A 1st base station, of which control channel is transmitted in a wireless communication system, comprising: a radio frequency unit; and a processor configured to control the radio frequency unit, the processor controlling the radio frequency unit to receive a semi-static ABRB (almost blank RB) pattern for E-PDCCH (enhanced-physical downlink control channel) of a 2nd base station containing a downlink scheduling information in a data region by RRC (radio resource control), the processor assigning E-PDCCH containing a downlink scheduling information of the 1st base station to a corresponding blank data region resource based on the ARBR (almost blank resource block) pattern from the 2nd base station. ### Claim 16 (depends on 15) The 1st base station of claim 15, wherein the 1st base station comprises a macro base station, wherein the 2nd base station comprises a femto base station, and wherein a macro base user equipment is located within the femto base station.