摘要:
A radio terminal according to an embodiment includes a controller that includes a first entity configured to perform WWAN communication with a WWAN-supporting base station, and a second entity located at a higher layer than the first entity. When the radio terminal receives, from the WWAN-supporting base station, a switching command for switching a communication target network between a WWAN and a WLAN with respect to data of the radio terminal, the first entity notifies the second entity of an indicator indicating the switching of the communication target network.
摘要:
A base station manages a first cell and a second cell and communicates with a user terminal by carrier aggregation which is applied to the first cell and the second cell, the first cell being allocated a licensed band requiring a license and a second cell being allocated an unlicensed band not requiring a license. The base station includes: a transmitter configured to transmit a synchronization signal used for synchronization between the second cell and the user terminal, by at least one carrier selected from the unlicensed band based on a result of carrier sensing in the second cell; and a controller configured to instruct the user terminal to perform a detection operation of the synchronization signal for all or part of the carrier through the first cell.
摘要:
A user terminal according to one embodiment performs dual connectivity communication with a first radio communication apparatus and a second radio communication apparatus. The user terminal comprises a controller configured to perform a process of transmitting data belonging to a split bearer to the first radio communication apparatus via a first transmission path for performing transmission to the first radio communication apparatus and a second transmission path for performing transmission to the second radio communication apparatus. The controller autonomously determines a data transmission ratio between the first transmission path and the second transmission path without relying on an instruction from the first radio communication apparatus.
摘要:
A user terminal comprises a controller configured to determine that a radio link failure in the WLAN communication occurs during an execution of cellular/WLAN aggregation by which traffic belonging to an identical data bearer or different data bearers are transmitted and received by using both the cellular communication and the WLAN communication.
摘要:
A communication control method according to an embodiment is a communication control method for controlling communication of a user terminal. The communication control method comprises: a step of transmitting, by a cellular base station, data of a predetermined layer, via a WLAN access point to the user terminal; and a step of transmitting, by the user terminal, delivery acknowledgement information based on the received data, via the WLAN access point to the cellular base station.
摘要:
A communication system according to an embodiment includes: a user terminal including a communication unit; and a cellular base station configured to communicate with the user terminal via a WLAN access point using a plurality of bearers. The communication unit includes a communication unit configured to communicate with the cellular base station via the WLAN access point using one of the bearers identified in accordance with identification information for uniquely identifying each of the bearers.
摘要:
A user terminal according to one embodiment is capable of using a plurality of radio access schemes including a cellular and a WLAN. The user terminal includes: a receiver configured to receive a first selection rule which is a rule for selecting a radio access scheme to be used among the cellular and the WLAN in a unit of IP flow used in communication with APN; a storage configured to store a second selection rule which is a rule for selecting a radio access scheme to be used among the cellular and the WLAN in a unit of the APN; and a controller configured to select a selection rule applied to change a radio access scheme from among the first selection rule and the second selection rule, when the user terminal has both the first selection rule and the second selection rule.
摘要:
A communication control method according to a present embodiment comprises: a step of transmitting, by a first base station, to a third base station that is a neighboring base station of the first base station, a first resource message relating to a first D2D resource used for the D2D proximity service in the first base station. The first resource message includes information on the first D2D resource and a second D2D resource used for the D2D proximity service in a second base station that is a neighboring base station of the first base station.
摘要:
A communication control method is used in a mobile communication system that supports a D2D proximity service. The communication control method comprises: a transmission step of transmitting, by a communication apparatus that uses a predetermined frequency band, at least one D2D resource notification in the predetermined frequency band; and a reception step of receiving, by a user terminal, the D2D resource notification transmitted in the predetermined frequency band. The D2D resource notification includes information indicating a D2D frequency band that is a frequency band available for the D2D proximity service.
摘要:
A base station according to the present invention is a base station that coordinates with a first neighboring base station to perform coordinated communication with a user terminal. The base station includes: a controller configured to secure, as a coordinated communication resource used for the coordinated communication, the same radio resource as a radio resource that the first neighboring base station secures for the coordinated communication; and a transmitter configured to transmit, to a second neighboring base station that does not perform the coordinated communication with the base station, transmission power information concerning transmission power of the base station corresponding to at least the coordinated communication resource.