# US 11,122,399 B2 · Method and apparatus for selecting carrier in communication system supporting vehicle to everything communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,399 B2 - Document ID: US11122399B2 - Status: Granted - Kind: B2 - Application number: 16/245,430 - Filed: 2019-01-11 - Published: 2019-07-18 - Granted: 2021-09-14 - Earliest claimed: 2018-01-12 - Assignees: Hyundai Motor Company; Kia Motors Corporation - Applicants: Hyundai Motor Company; Kia Motors Corporation - Inventors: Gene Beck Hahn; Seung Wook Park - Web page: https://patentgrep.com/patent/US11122399B2 ## CPC - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 76/14: Direct-mode setup - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04W 72/02: Selection of wireless resources by user or terminal - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 72/542: using measured or perceived quality - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 80/02: Data link layer protocols - H04W 72/52: based on load - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract An operation method of a terminal located in a vehicle supporting vehicle-to-everything (V2X) communication may include: receiving, from a base station, a first message requesting reporting of a first counter corresponding to a channel busy ratio (CBR) measurement cycle for a carrier (re)selection procedure; transmitting, by the terminal, a second message including the first counter to the base station; and receiving, from the base station, a third message including a second counter corresponding to a CBR measurement cycle for a resource pool (re)selection procedure. The second counter can be reconfigured by the base station to be greater than or equal to the first counter. ## Claims ### Claim 1 An operation method of a terminal located in a vehicle supporting vehicle-to-everything (V2X) communication, the operation method comprising: receiving, from a base station, a first message requesting reporting of a first counter corresponding to a channel busy ratio (CBR) measurement cycle for a carrier selection procedure; transmitting, by the terminal, a second message including the first counter to the base station; and receiving, from the base station, a third message including a second counter corresponding to a CBR measurement cycle for a resource pool selection procedure, wherein the second counter is reconfigured by the base station to be greater than or equal to the first counter. ### Claim 2 (depends on 1) The operation method according to claim 1, further comprising performing, by the terminal, V2X communication based on a carrier aggregation (CA) scheme, wherein one or more secondary carriers are selected in the carrier selection procedure. ### Claim 3 (depends on 1) The operation method according to claim 1, wherein the first message is a radio resource control (RRC) message including configuration information of a resource pool. ### Claim 4 (depends on 1) The operation method according to claim 1, wherein the first message includes configuration information for the carrier selection procedure. ### Claim 5 (depends on 1) The operation method according to claim 1, wherein the second message includes user equipment (UE) assistance information. ### Claim 6 (depends on 1) The operation method according to claim 1, wherein the second counter is received through an RRC message or downlink control information (DCI). ### Claim 7 An operation method of a terminal located in a vehicle supporting vehicle-to-everything (V2X) communication, the operation method comprising: receiving, from a base station, a first message requesting reconfiguration of a first counter corresponding to a channel busy ratio (CBR) measurement cycle for a resource pool selection procedure; comparing, by the terminal, the first counter and a second counter corresponding to a CBR measurement cycle for a carrier selection procedure; and reconfiguring, by the terminal, the first counter such that the first counter is greater than or equal to the second counter when the first counter is shorter than the second counter. ### Claim 8 (depends on 7) The operation method according to claim 7, further comprising transmitting, by the terminal, a second message including the reconfigured first counter to the base station. ### Claim 9 (depends on 8) The operation method according to claim 8, wherein the second message includes user equipment (UE) assistance information. ### Claim 10 (depends on 7) The operation method according to claim 7, further comprising performing, by the terminal, V2X communication based on a carrier aggregation (CA) scheme, wherein one or more secondary carriers are selected in the carrier selection procedure. ### Claim 11 (depends on 7) The operation method according to claim 7, wherein the first message is a radio resource control (RRC) message including configuration information of a resource pool. ### Claim 12 (depends on 7) The operation method according to claim 7, wherein the first counter and the second counter are operated independently of each other. ### Claim 13 An operation method of a terminal located in a vehicle supporting vehicle-to-everything (V2X) communication, the operation method comprising: receiving, from a base station, a first message requesting reporting of a first counter corresponding to a channel busy ratio (CBR) measurement cycle for a carrier reselection procedure; transmitting, by the terminal, a second message including the first counter to the base station; and receiving, from the base station, a third message including a second counter corresponding to a CBR measurement cycle for a resource pool reselection procedure, wherein the second counter is reconfigured by the base station to be greater than or equal to the first counter. ### Claim 14 An operation method of a terminal located in a vehicle supporting vehicle-to-everything (V2X) communication, the operation method comprising: receiving, from a base station, a first message requesting reconfiguration of a first counter corresponding to a channel busy ratio (CBR) measurement cycle for a resource pool reselection procedure; comparing, by the terminal, the first counter and a second counter corresponding to a CBR measurement cycle for a carrier reselection procedure; and reconfiguring, by the terminal, the first counter such that the first counter is greater than or equal to the second counter when the first counter is shorter than the second counter.