# US 9,883,545 B2 · Apparatus and method for selecting channel 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 9,883,545 B2 - Document ID: US9883545B2 - Status: Granted - Kind: B2 - Application number: 14/796,889 - Filed: 2015-07-10 - Published: 2016-01-14 - Granted: 2018-01-30 - Earliest claimed: 2014-07-11 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Eun-Young Seo; Hee-Seung Kim; Seok-Yong Lee; Ohyun Jo - Web page: https://patentgrep.com/patent/US9883545B2 ## CPC - H04W 76/18: Management of setup rejection or failure - H04W 76/14: Direct-mode setup - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present disclosure relates to a method and apparatus for selecting a channel in a wireless communication system. A method of operating a terminal in a wireless communication system is provided. The method includes transmitting information regarding a second channel and information regarding a third channel to a peer terminal in a first channel. The method also includes transmitting a first request signal for connection with the peer terminal in the second channel. The method further includes if a response signal for the first request signal is not received in the second channel, transmitting a second request signal for connection with the peer terminal in the third channel. The first channel belongs to a first band, and the second channel belongs to a second band. The present disclosure also includes other exemplary embodiments different from the aforementioned exemplary embodiment. ## Claims ### Claim 1 A method of operating a terminal in a wireless communication system, the method comprising: transmitting information for connection through a channel of a second frequency band and other information for connection through a channel of a third frequency band to a peer terminal on a channel of a first frequency band; transmitting a first request signal for connection with the peer terminal on the channel of the second frequency band; and if a response signal for the first request signal is not received, transmitting a second request signal for connection with the peer terminal on the channel of the third frequency band, wherein the information is used for reception of the first request signal by the peer terminal, and wherein the other information is used for reception of the second request signal by the peer terminal. ### Claim 2 (depends on 1) The method of claim 1, wherein the information comprises information for indicating the second frequency band, further comprising transmitting, to the peer terminal on the channel of the first frequency band, information for indicating a time duration in which the channel of the second frequency band is changed to the channel of the third frequency band when the connection through the channel of the second frequency band fails. ### Claim 3 (depends on 2) The method of claim 2, further comprising: driving a module for processing a signal of a second band if it is confirmed that the channel of the second frequency band is comprised in the second band based on the information. ### Claim 4 (depends on 2) The method of claim 2, wherein the transmitting of the second request signal on the channel of the third frequency band comprises transmitting the second request signal on the channel of the third frequency band if the response signal is not received until a time elapsed by the time duration from a time at which the connection through the channel of the second frequency band is attempted. ### Claim 5 (depends on 1) The method of claim 1, wherein the other information comprises secondary channel information which designates a channel for re-attempting a connection in a connection failure situation, and wherein the channel of the third frequency band is identified by using the secondary channel information. ### Claim 6 A method of operating a terminal in a wireless communication system, the method comprising: receiving information for connection through a channel of a second frequency band and other information for connection through a channel of a third frequency band from a peer terminal on a channel of a first frequency band; and if a first request signal is not received from the peer terminal on the channel of the second frequency band based on the information, receiving a second request signal from the peer terminal on the channel of the third frequency band based on the other information. ### Claim 7 (depends on 6) The method of claim 6, wherein the information comprises information for indicating the second frequency band, further comprising receiving, from the peer terminal on the channel of the first frequency band, information for indicating a time duration in which the channel of the second frequency band is changed to the channel of the third frequency band when the connection through the channel of the second frequency band fails. ### Claim 8 (depends on 7) The method of claim 7, further comprising driving a module for processing a signal of a second band if it is confirmed that the channel of the second frequency band is comprised in the second band based on the information. ### Claim 9 (depends on 7) The method of claim 7, wherein the receiving the second request signal from the peer terminal on the channel of the third frequency band comprises receiving the second request signal on the channel of the third frequency band if the first request signal is not received until a time elapsed by the time duration from a time at which the connection through the channel of the second frequency band is attempted. ### Claim 10 (depends on 6) The method of claim 6, Wherein the other information comprises secondary channel information which designates a channel for re-attempting a connection in a connection failure situation, and wherein the channel of the third frequency band is identified by using the secondary channel information. ### Claim 11 A terminal in a wireless communication system, the terminal comprising: a transceiver; and at least one processor operatively coupled with the transceiver, wherein the at least one processor is configured to control to: transmit information for connection through a channel of a second frequency band and other information for connection through a channel of a third frequency band to a peer terminal on a channel of a first frequency band, transmit a first request signal for connection with the peer terminal on the channel of the second frequency band, and transmit a second request signal for connection with the peer terminal on the channel of the third frequency band if a response signal for the first request signal is not received, wherein the information is used for reception of the first request signal by the peer terminal, and wherein the other information is used for reception of the second request signal by the peer terminal. ### Claim 12 (depends on 11) The terminal of claim 11, wherein the information comprises information for indicating the second frequency band and wherein the at least one processor is further configured to control to transmit information for indicating a time duration in which the channel of the second frequency band is changed to the channel of the third frequency band when the connection through the channel of the second frequency band fails. ### Claim 13 (depends on 12) The terminal of claim 12, wherein the at least one processor is further configured to drive a module for processing a signal of a second band if it is confirmed that the channel of the second frequency band is comprised in the second band based on the information. ### Claim 14 (depends on 12) The terminal of claim 12, wherein the at least one processor is configured to control to transmit the second request signal on the channel of the third frequency band if the response signal is not received until a time elapsed by the time duration from a time at which the connection through the channel of the second frequency band is attempted. ### Claim 15 (depends on 11) The terminal of claim 11, wherein the other information comprises secondary channel information which designates a channel for re-attempting a connection in a connection failure situation, and wherein the channel of the third frequency band is identified by using the secondary channel information. ### Claim 16 A terminal in a wireless communication system, the terminal comprising: a transceiver; and at least one processor operatively coupled with the transceiver, wherein the at least one processor is configured to control to: receive information for connection through a channel of a second frequency band and other information for connection through a channel of a third frequency band from a peer terminal on a channel of a first frequency band, and receive a second request signal from the peer terminal on the channel of the third frequency band based on the other information if a first signal is not received from the peer terminal on the channel of the second frequency band based on the information. ### Claim 17 (depends on 16) The terminal of claim 16, wherein the information comprises information for indicating the second frequency band, and wherein the at least one processor is further configured to control to receive, from the peer terminal on the channel of the first frequency band, information for indicating a time duration in which the channel of the second frequency band is changed to the channel of the third frequency band when the connection through the channel of the second frequency band fails. ### Claim 18 (depends on 17) The terminal of claim 17, wherein the at least one processor is further configured to drive a module for processing a signal of a second band if it is confirmed that the channel of the second frequency band is comprised in the second band based on the information. ### Claim 19 (depends on 17) The terminal of claim 17, wherein the at least one processor is configured to receive the second request signal on the channel of the third frequency band if the first signal is not received until a time elapsed by the time duration from a time at which the connection through the channel of the second frequency band is attempted. ### Claim 20 (depends on 16) The terminal of claim 16, wherein the other information comprises secondary channel information which designates a channel for re-attempting a connection in a connection failure situation, and wherein the channel of the third frequency band is identified by using the secondary channel information.