Patent ID: 9215618
Filing Date: 2015-12-15
Classification: H04M,H04W

Abstract:
1. A radio communication system comprising: at least one user equipment configured to execute voice communication and data communication by exchanging packets; multiple base stations each configured to execute wireless communication with the user equipment; and a control station configured to control establishment of bearers and sessions used for communication of the user equipment executed via the base stations, the base station comprising: a radio communicator configured to execute radio communication with the user equipment; a network communicator configured to execute communication with the control station and another base station; a congestion level determiner configured to determine a voice congestion level indicating a degree of congestion of voice communication in the base station, and to determine a data congestion level indicating a degree of congestion of data communication in the base station; a bearer establisher configured to establish a data bearer to be used for data communication and a voice bearer to be used for voice communication on the basis of control by the control station; a waiting timer section configured to start a timer after establishment of the data bearer, the timer expiring after passage of a predetermined time; and an access point controller configured to select an access point base station for the user equipment on the basis of the congestion level in the base station and the congestion level in another base station, and to indicate the access point base station to the user equipment, the control station configured to, when the user equipment executes voice communication, start voice communication session for the user equipment after the bearer establisher of the base station establishes the data bearer, and to control the bearer establisher of the base station to establish the voice bearer after starting the voice communication session, the access point controller of the base station configured to, after expiration of the timer started by the waiting tinier section, select the access point base station for the user equipment on the basis of the voice congestion levels and indicate the access point base station to the user equipment if the voice bearer has been established, the access point controller of the base station configured to, after expiration of the timer started by the waiting timer section, select the access point base station for the user equipment on the basis of the data congestion levels and indicate the access point base station to the user equipment if the voice bearer has not been established.