# US 2010/0165950 A1 · Mobile station, base station, and cell selection method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0165950 A1 - Document ID: US20100165950A1 - Status: Published application - Kind: A1 - Application number: 12/278,934 - Filed: 2007-02-13 - Published: 2010-07-01 - Earliest claimed: 2006-02-15 - Assignees: Ntt Docomo, Inc. - Inventors: Sadayuki Abeta; Minami Ishii; Takehiro Nakamura - Web page: https://patentgrep.com/patent/US20100165950A1 ## CPC - H04W 36/06: Reselecting a communication resource in the serving access point - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract In a disclosed method, a mobile station determines whether handover is intra-base-station based on a received signal; the mobile station sends a handover request indicating the determination result to a base station; the base station determines whether the handover is intra-base-station or inter-base-station based on the handover request; and the base station performs an intra-base-station handover process based on a CQI reception level threshold for intra-base-station handover if the handover is intra-base-station. ## Claims ### Claim 1 A mobile station, comprising: a determining unit configured to determine whether handover is intra-base-station based on a received signal; and a reporting unit configured to report the determination result to a base station. ### Claim 2 (depends on 1) The mobile station as claimed in claim 1, wherein the determining unit is configured to determine whether the handover is intra-base-station based on identification information in a broadcast channel. ### Claim 3 (depends on 1) The mobile station as claimed in claim 1, wherein the determining unit is configured to determine whether the handover is intra-base-station based on at least one of cell-specific information and base-station-specific information. ### Claim 4 (depends on 1) The mobile station as claimed in claim 1, wherein the reporting unit is configured to switch reporting means based on the determination result. ### Claim 5 (depends on 1) The mobile station as claimed in claim 1, wherein the reporting unit is configured to change a report timing based on the determination result. ### Claim 6 (depends on 5) The mobile station as claimed in claim 5, wherein the reporting unit is configured to start reporting the determination result when a reception level of a handover-destination cell is equal to or less than a reception level of a handover-starting cell if the handover is intra-base-station; and to report the determination result when the reception level of the handover-destination cell becomes equal to or greater than the reception level of the handover-starting cell if the handover is inter-base-station. ### Claim 7 A base station, comprising: a determining unit configured to determine whether handover is intra-base-station or inter-base-station based on a handover request from a mobile station; and an intra-base-station handover processing unit configured to perform an intra-base-station handover process based on a reception level threshold for intra-base-station handover if the handover is intra-base-station. ### Claim 8 (depends on 7) The base station as claimed in claim 7, further comprising: a broadcast information generating unit configured to generate broadcast information including cell identification information; and a sending unit configured to send the broadcast information. ### Claim 9 (depends on 7) The base station as claimed in claim 7, further comprising: a specific information generating unit configured to generate at least one of cell-specific information and base-station-specific information. ### Claim 10 (depends on 9) The base station as claimed in claim 9, wherein the specific information generating unit is configured to generate a scramble code specifically assigned to the base station. ### Claim 11 A cell selection method, comprising: a handover determining step of determining, by a mobile station, whether handover is intra-base-station based on a received signal; a handover request sending step of sending, by the mobile station, a handover request indicating the determination result to a base station; an inter-base-station handover determining step of determining, by the base station, whether the handover is intra-base-station or inter-base-station based on the handover request; and an intra-base-station handover processing step of performing, by the base station, an intra-base-station handover process based on a reception level threshold for intra-base-station handover if the handover is intra-base-station. ### Claim 12 (depends on 11) The cell selection method as claimed in claim 11, wherein in the information determining step, whether the handover is intra-base-station is determined based on identification information in a broadcast channel. ### Claim 13 (depends on 11) The cell selection method as claimed in claim 11, wherein in the information determining step, whether the handover is intra-base-station is determined based on at least one of cell-specific information and base-station-specific information. ### Claim 14 (depends on 11) The cell selection method as claimed in claim 11, further comprising: a broadcast information generating step of generating, by the base station, broadcast information including cell identification information; and a broadcast information sending step of sending, by the base station, the broadcast information. ### Claim 15 (depends on 13) The cell selection method as claimed in claim 13, further comprising: a specific information generating step of generating, by the base station, at least one of the cell-specific information and the base-station-specific information. ### Claim 16 (depends on 15) The cell selection method as claimed in claim 15, wherein in the specific information generating step, a scramble code specifically assigned to the base station is generated.