# US 10,375,577 B2 · Method of automatically selecting legal communication channel used by mobile electronic devices and mobile electronic devices using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,577 B2 - Document ID: US10375577B2 - Status: Granted - Kind: B2 - Application number: 14/732,780 - Filed: 2015-06-08 - Published: 2015-12-24 - Granted: 2019-08-06 - Earliest claimed: 2014-06-20 - Assignees: HTC Corporation - Applicants: HTC Corporation - Inventors: Yuan-Kang Wang - Web page: https://patentgrep.com/patent/US10375577B2 ## CPC - H04W 16/14: Spectrum sharing arrangements {between different networks} - H04W 4/02: Services making use of location information - H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication - H04W 48/20: Selecting an access point - H04W 48/16: Discovering, processing access restriction or access information - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The disclosure provides a method of automatically selecting a legal range communication channel within an unlicensed spectrum for a mobile electronic device and a mobile electronic device using the same method. In one of the exemplary embodiments, the mobile electronic device would determine a geographical region information in which the mobile electronic device is located; determine a legal range of communication channels within an unlicensed spectrum according to the geographical region information; and select a communication channel from the legal range of communication channels for a communication through a first wireless interface. ## Claims ### Claim 1 A method of automatically selecting a communication channel of a region applicable for a mobile electronic device, the method is performed by the mobile electronic device and comprising: receiving, through a first wireless interface, a country code that represents a geographical region information; in response to receiving the country code, accessing a channel range lookup table to obtain a legal range of communication channels according to the country code; setting up a Wi-Fi access point using a second wireless interface by using a first channel of the legal range of communication channels so as to make the Wi-Fi access point connectable by an external device through the legal range of communication channels; and switching the Wi-Fi access point from using the first channel to using a second channel of the legal range of communication channels without receiving another country code through the first wireless interface in response to a need for changing the communication channel. ### Claim 2 (depends on 1) The method of claim 1, wherein the channel range lookup table comprises a plurality of channel groups of only an unlicensed spectrum, wherein the plurality of channel groups comprises a first channel group and a second channel group. ### Claim 3 (depends on 2) The method of claim 2, wherein accessing the channel range lookup table to obtain the legal range of communication channels according to the country code comprising: accessing the channel range lookup table to determine which channel group of the plurality of channel groups the country code corresponding to; allowing only channels of the first channel group as the legal range of communication channels by presuming that the channels of the first channel group are all legal in response to the country code is determined to correspond to the first channel group; and allowing only channels of the second channel group as the legal range of communication channels by presuming that the channels of the second channel group are all legal in response to the country code is determined to correspond to the second channel group. ### Claim 4 (depends on 3) The method of claim 3 further comprising: receiving, through the first wireless interface, a second country code after relocating to a different region; determining, from the plurality of channel groups, one channel group in which the second country code corresponds to by accessing the channel range lookup table; and determining only channels of the one channel group as the legal range of communication channels. ### Claim 5 A mobile electronic device comprising: a first wireless interface; a second wireless interface; and a processing unit that controls the first wireless interface and the second wireless interface, the processing unit is configured at least for: receiving, through the first wireless interface, a country code that represents a geographical region information; in response to receiving the country code, accessing a channel range lookup table to obtain a legal range of communication channels according to the country code; setting up a Wi-Fi access point using the second wireless interface by using a first channel of the legal range of communication channels so as to make the Wi-Fi access point connectable by an external device through the legal range of communication channels; and switching the Wi-Fi access point from using the first channel to using a second channel of the legal range of communication channels without receiving another country code through the first wireless interface in response to a need for changing a communication channel. ### Claim 6 A non-transitory storage medium containing computer readable programs which are executed by a processor unit of a mobile electronic device to perform functions comprising: receiving, through a first wireless interface, a country code that represents a geographical region interface; in response to receiving the country code, accessing a channel range lookup table to obtain a legal range of communication channels according to the country code; setting up a Wi-Fi access point using a second wireless interface by using a first channel of the legal range of communication channels so as to make the Wi-Fi access point connectable by an external device through the legal range of communication channels; and switching the Wi-Fi access point from using the first channel to using a second channel of the legal range of communication channels without receiving another country code through the first wireless interface in response to a need for changing a communication channel.