RADIO COMMUNICATION SYSTEM AND COMMUNICATION CONTROL METHOD

摘要

A radio communication system includes a user device, base stations, and a communication control device. The communication control device generates and reports, to the user device, selection information that is used to select base stations with which the user device should maintain synchronization. The user device selects, based on the selection information, base stations with which the user device should maintain synchronization. The user device reports, to the communication control device, identifiers of the selected base stations and received levels of radio waves transmitted from the base stations corresponding to the identifiers. The user device maintains synchronization with each of the selected base stations.

主权项

1. A radio communication system comprising:
base stations that are identified by their respective identifiers; a user device that performs radio communication with each of the base stations; and a communication control device that controls radio communication between the base stations and the user device,the user device comprising:
a level measuring unit that measures received levels of radio waves transmitted from the base stations; and a storage unit that stores a first list and a second list,
the first list comprising identifiers of base stations that are wirelessly communicable with the user device, the identifiers having been acquired by synchronization acquisition,the second list comprising identifiers of base stations with which the user device should maintain synchronization,the communication control device comprising:
a selection information generating unit that generates selection information that is used to select base stations with which the user device should maintain synchronization; and a selection information reporting unit that reports the selection information to the user device,the user device further comprising:
a base station selecting unit that selects, based on the selection information reported by the communication control device, base stations with which the user device should maintain synchronization from among base stations corresponding to the identifiers comprised in the first list so as to store identifiers of the selected base stations in the second list; a base station information reporting unit that reports, to the communication control device, the identifiers of the base stations selected by the base station selecting unit, the identifiers being comprised in the second list, and received levels of radio waves transmitted from the base stations corresponding to the identifiers; and a synchronization maintaining unit that maintains synchronization with each of the base stations corresponding to the identifiers comprised in the second list.