# US 12,004,241 B2 · Base station device, wireless communication device, and 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 12,004,241 B2 - Document ID: US12004241B2 - Status: Granted - Kind: B2 - Application number: 17/309,877 - Filed: 2019-10-21 - Published: 2022-02-17 - Granted: 2024-06-04 - Earliest claimed: 2019-01-10 - Assignees: Sony Group Corporation - Applicants: Sony Group Corporation - Inventors: Shinichiro Tsuda - Web page: https://patentgrep.com/patent/US12004241B2 ## CPC - H04W 48/14: using user query {or user detection} - H04W 76/11: Allocation or use of connection identifiers - H04W 48/12: using downlink control channel - H04W 48/18: Selecting a network or a communication service - H04W 84/045: {using private Base Stations, e.g. femto Base Stations, home Node B} - H04W 84/105: {PBS [Private Base Station] network (H04W84/12 - H04W84/16 take precedence)} - H04W 88/08: Access point devices - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A private network is flexibly built while ensuring physical or logical separation from a public network. A base station device notifies system information including a first identifier corresponding to a communication network (for example, PLMN) in an identifier list. In that state, a second identifier used locally is added to the identifier list of the system information according to control information from a control device. Thereafter, notification of the system information including the first and second identifiers in the identifier list is started. Therefore, the private network is built. ## Claims ### Claim 1 A base station device, comprising: circuitry configured to: in a state of notification of system information that includes a first identifier corresponding to a first communication network in an identifier list; add a second identifier used locally to the identifier list according to first control information from a control device; and start notification of the system information that includes the first identifier and the second identifier in the identifier list; and in a state of the notification of the system information that includes the first identifier and the second identifier in the identifier list: delete the second identifier from the identifier list according to second control information from the control device; and start notification of the system information that does not include at least the second identifier in the identifier list. ### Claim 2 (depends on 1) The base station device according to claim 1, wherein the first control information includes information associated with the second identifier and a command that instructs the addition of the second identifier to the identifier list. ### Claim 3 (depends on 1) The base station device according to claim 1, wherein the second control information includes information associated with the second identifier and a command that instructs the deletion of the second identifier from the identifier list. ### Claim 4 (depends on 1) The base station device according to claim 1, wherein according to third control information from the control device, the circuitry is further configured to: delete the first identifier is the identifier list; and start notification of the system information including only the second identifier in the identifier list. ### Claim 5 (depends on 4) The base station device according to claim 4, wherein the third control information includes information associated with the second identifier and a command that instructs the addition of the second identifier to the identifier list and the deletion of the first identifier from the identifier list. ### Claim 6 (depends on 1) The base station device according to claim 1, wherein an identifier set that includes a set of identifiers not assigned to the first identifier is defined in advance, and the second identifier is autonomously identified from the identifier set. ### Claim 7 (depends on 1) The base station device according to claim 1, wherein in a case where an identifier set that includes a set of identifiers not assigned to the first identifier is defined in advance, the circuitry is further configured to: detect whether an identifier included in the identifier set is not used in surrounding base station devices; and identify the identifier not used by the surrounding base station devices from the identifier set. ### Claim 8 (depends on 1) The base station device according to claim 1, wherein the base station device is a relay base station device, and the relay base station device is configured to establish a wireless backhaul line with a donor base station device using a mobile termination function such that the relay base station device is connected to the control device through the wireless backhaul line. ### Claim 9 A wireless communication system, comprising: a base station device that is connected to a first core network through a first backhaul line, wherein the base station device is configured to: in a state of notification of system information that includes a first identifier corresponding to a first communication network in an identifier list: add a second identifier used locally to the identifier list according to first control information from a control device; and start notification of the system information that includes the first identifier and the second identifier in the identifier list; and in a state of the notification of the system information that includes the first identifier and the second identifier in the identifier list: delete the second identifier from the identifier list according to second control information from the control device; and start the notification of the system information that includes the first identifier in the identifier list; and a wireless communication device configured to: receive the system information transmitted from the base station device; select one of the first identifier or the second identifier from the identifier list included in the system information; and make a connection request to the base station device based on the selected one of the first identifier or the second identifier. ### Claim 10 (depends on 9) The wireless communication system according to claim 9, wherein the wireless communication device is further configured to establish a protocol data unit (PDU) session associated with one of the first identifier or the second identifier with the first core network through the first backhaul line. ### Claim 11 (depends on 9) The wireless communication system according to claim 9, wherein the base station device is further connected to a second core network through a second backhaul line, and the wireless communication device is further configured to establish at least one of a protocol data unit (PDU) session associated with the first identifier with the first core network, or a PDU session associated with the second identifier with the second core network. ### Claim 12 (depends on 9) The wireless communication system according to claim 9, wherein the base station device is further configured to: delete the first identifier from the identifier list according to third control information; and start notification of the system information that includes the second identifier in the identifier list, and the wireless communication device is further configured to: select the second identifier from the identifier list included in the system information; and make the connection request to the base station device based on the selected second identifier. ### Claim 13 (depends on 12) The wireless communication system according to claim 12, wherein the base station device is further connected to a second core network through a second backhaul line, and the wireless communication device is further configured to establish a protocol data unit (PDU) session associated with the second identifier with the second core network. ### Claim 14 A wireless communication device in which an identifier set including a set of identifiers not assigned to a network identifier is defined in advance, the wireless communication device comprising: a memory configured to store information associated with the identifier set; and circuitry configured to: acquire system information notified from a base station device; compare an identifier included in an identifier list of the acquired system information with an arbitrary identifier in the identifier set; and identify a first identifier based on the comparison, wherein the memory is further configured to: store information associated with an arbitrary second identifier that has already been assigned as the network identifier, and the circuitry is further configured to: select the arbitrary second identifier; compare the identifier included in the identifier list of the system information with the arbitrary second identifier; and perform an attach procedure to connect to a core network device belonging to the first identifier. ### Claim 15 (depends on 14) The wireless communication device according to claim 14, wherein the identifier set is defined in an area unit.