Patent ID: 7907949
Filing Date: 2011-03-15
Classification: H04W

Abstract:
1. An adjacent station information management apparatus in a radio communication system, the radio communication system comprising: a plurality of base stations performing radio communication with mobile terminals using Code Division Multiple Access (CDMA), and a base station control apparatus controlling the plurality of base stations, the adjacent station information management apparatus updating and managing adjacent station information that is stored in an adjacent station information storage area provided in each of the plurality of base stations and that includes an identifier of at least one adjacent base station, adjacent to a base station concerned, and communication characteristic information indicating communication characteristics of the adjacent base station, or the adjacent station information of at least one adjacent base station adjacent to each of the plurality of the base stations, that is stored in an adjacent station information storage area provided in the base station control apparatus, wherein the adjacent station information management apparatus comprises: a protocol message acquisition means which acquires, for each base station under management of the base station control apparatus, protocol messages wirelessly transmitted between a mobile terminal and a base station based on standardized operations; a protocol message storage area for storing the protocol messages of each base station, acquired by the protocol message acquisition means; a base station information acquisition means, which acquires base station information for each base station under management of the base station control apparatus, based on a predetermined acquisition condition, the base station information including an identifier of each base station and communication characteristic information indicating communication characteristics of the base station; a base station information storage area for storing, for each base station, the base station information of each base station, acquired by the base station information acquisition means; and an information update instruction means, which: extracts, from the protocol message storage area, combinations of protocol messages between the mobile terminal and the base station indicating that hard handoff is performed; uses communication characteristic information of a handoff candidate base station, included in a protocol message, among the combinations of protocol messages, that is transmitted to the base station by the mobile terminal, in order to specify a base station identifier corresponding to the communication characteristic information, from among a plurality of base station identifiers preliminarily acquired and stored in the base station information storage area; and instructs a base station or the base station control apparatus, that can access adjacent station information of the handoff source base station, to add the base station identifier specified as the handoff candidate, and the communication characteristic information, as adjacent station information of the handoff source base station.