# US 2014/0155062 A1 · Method and Apparatus for Selecting Carrier in Wireless Communication System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155062 A1 - Document ID: US20140155062A1 - Status: Published application - Kind: A1 - Application number: 14/233,202 - Filed: 2012-08-17 - Published: 2014-06-05 - Earliest claimed: 2011-08-18 - Assignees: LG Electronics Inc. - Inventors: Gene Beck Hahn; Jae Hoon Chung - Web page: https://patentgrep.com/patent/US20140155062A1 ## CPC - H04W 48/16: Discovering, processing access restriction or access information - H04W 16/06: Hybrid resource partitioning, e.g. channel borrowing - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 84/045: {using private Base Stations, e.g. femto Base Stations, home Node B} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method for selecting a carrier in a wireless communication system is provided. A home eNodeB (HeNB) receives a carrier information response message as a response of the carrier information request message, and selects a primary cell (PCell) of the HeNB based on the received information on carriers used by the pico eNB. The carrier information response message includes the information on carriers used by a pico eNB. ## Claims ### Claim 1 A method for selecting, by a home eNodeB (HeNB), a carrier in a wireless communication system, the method comprising: transmitting a carrier information request message including a request of information on carriers used by a pico eNB; receiving a carrier information response message as a response of the carrier information request message, the carrier information response message including the information on carriers used by the pico eNB, the information on carriers indicating information on user equipments (UEs) corresponding to the carriers used by the pico eNB; and selecting a primary cell (PCell) of the HeNB based on the received information on carriers used by the pico eNB. ### Claim 2 (depends on 1) The method of claim 1, wherein the information on UEs corresponding to the carriers used by the pico eNB indicates the number of the UEs using the corresponding carrier as a PCell or a SCell. ### Claim 3 (depends on 1) The method of claim 1, wherein the information on UEs corresponding to the carriers used by the pico eNB indicates a resource usage status of the corresponding carrier by the UEs. ### Claim 4 (depends on 3) The method of claim 3, wherein the resource usage status of the corresponding carrier by the UEs is calculated for a downlink (DL)/uplink (UL)/total physical resource block (PRB) as defined in X2. ### Claim 5 (depends on 1) The method of claim 1, wherein the carrier information request message includes cell identity (ID) related information. ### Claim 6 (depends on 1) The method of claim 1, wherein the carrier information response message includes cell ID related information. ### Claim 7 (depends on 1) The method of claim 1, wherein the carrier information request message is transmitted to the pico eNB through a X2 interface, and wherein the carrier information response message is received from the pico eNB through the X2 interface. ### Claim 8 (depends on 7) The method of claim 7, wherein the carrier information request message is transmitted through a HeNB gateway (GW), and wherein the carrier information response message is received through the HeNB GW. ### Claim 9 (depends on 7) The method of claim 7, wherein the carrier information request message or the carrier information response message is included in one of a resource status request message, resource status response message, resource status update message and load information. ### Claim 10 (depends on 1) The method of claim 1, wherein the carrier information request message is transmitted to the pico eNB directly during a X2 setup procedure, and wherein the carrier information response message is received from the pico eNB directly during the X2 setup procedure. ### Claim 11 (depends on 10) The method of claim 10, wherein the carrier information request message is included in an X2 setup request message, and wherein the carrier information response message is included in an X2 setup response message which is a response of the X2 setup request message. ### Claim 12 (depends on 11) The method of claim 11, wherein the X2 setup request message is transmitted through a HeNB GW, and wherein the X2 setup response message is received through the HeNB. ### Claim 13 (depends on 1) The method of claim 1, wherein the carrier information request message is transmitted to a mobility management entity (MME) through an S1 interface, and wherein the carrier information response message is received from the MME through the S1 interface. ### Claim 14 (depends on 1) The method of claim 1, wherein the carrier information request message is transmitted to a MME during an S1 setup procedure, and wherein the carrier information response message is received from the MME during the S1 setup procedure. ### Claim 15 A method for selecting, by a first home eNodeB (HeNB), a carrier in a wireless communication system, the method comprising: transmitting a carrier information request message including a request of information on carriers used by a second HeNB; receiving a carrier information response message as a response of the carrier information request message, the carrier information response message including the information on carriers used by the second HeNB, the information on carriers indicating information on user equipments (UEs) corresponding to the carriers used by the second HeNB; and selecting a primary cell (PCell) of the first HeNB based on the received information on carriers used by the second HeNB.