Abstract:
A user terminal according to an embodiment includes a receiver that receives a list transmitted from a base station, the list including discovery resource configurations; and a controller that selects a discovery resource configuration from among the discovery resource configurations, and uses the selected discovery resource configuration to directly transmit a discovery signal to other user terminals. Each of the discovery resource configurations includes: time resource information indicating time resources used for transmitting a discovery signal and including a variable number substituted into a mathematical expression; frequency resource information indicating frequency resources used for transmitting the discovery signal and including a range of continuous resource block numbers; and power information indicating transmission power used for transmitting the discovery signal.
Abstract:
A first base station is configured to be connected with a second base station via an X2 interface. The first base station includes: a controller containing at least one processor and at least one memory, and configured to execute processes of transmitting a message, which includes a first identifier, coverage state information, and a second identifier, to the second base station before modifying a coverage of the first cell, the first identifier identifying the first cell, the coverage state information indicating that a state of the coverage after modification of the coverage, the second identifier identifying a second cell for compensating at least part of the coverage of the first cell; and modifying the coverage of the first cell after transmitting the message.
Abstract:
A radio terminal comprises a controller configured to perform a predetermined process for switching a standby target or a connection target between a mobile communication network and a wireless LAN when at least a part of a coverage area of the wireless LAN overlaps a coverage area of the mobile communication network. The controller executes the predetermined process when a state where first information at the mobile communication network side satisfies a first condition and second information at the wireless LAN side satisfies a second condition is continued over a predetermined period. The controller determines whether or not the second information at the wireless LAN side satisfies the second condition, when a validity period set to the second information at the wireless LAN side has not expired.
Abstract:
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: transmitting, by a cellular base station, data of a predetermined layer, via a WLAN access point to the user terminal; and transmitting, by the user terminal, delivery acknowledgement information based on the received data, via the WLAN access point to the cellular base station.
Abstract:
A first base station is configured to be connected with a second base station via an X2 interface. The first base station includes: a controller containing at least one processor and at least one memory, and configured to execute processes of transmitting a message, which includes a first identifier, a change notification, coverage state information, and a second identifier, to the second base station before modifying a coverage of the first cell, the first identifier identifying the first cell, the change notification indicating that the first base station is planned to modify the coverage of the first cell, the coverage state information indicating that a state of the coverage after modification of the coverage, the second identifier identifying a second cell for compensating at least part of the coverage of the first cell; and modifying the coverage of the first cell after transmitting the message.
Abstract:
A communication control method according to a first aspect is a method in a mobile communication system for supporting dual connectivity communication using a master base station for establishing RRC connection with a user terminal and a secondary base station for providing additional radio resources to the user terminal. The communication control method comprises: an inter-master base station handover procedure for performing handover of the user terminal from a source master base station to a target master base station without changing the secondary base station.
Abstract:
A communication control method for performing an offload from a cellular RAN to a wireless LAN, includes a step of performing, by a user terminal, a network selection operation to select an appropriate access network with which a traffic of the user terminal is exchanged, from the cellular RAN and the wireless LAN on the basis of determination parameters. The determination parameters comprises at least one of: a cellular network status that is a network status concerning the cellular RAN; a wireless LAN network status that is a network status concerning the wireless LAN; a cellular radio link status that is a radio link status between the cellular RAN and the user terminal; and a wireless LAN radio link status that is a radio link status between the wireless LAN and the user terminal.
Abstract:
UE 100 transmits and receives traffic to and from eNB 200 in a cellular communication system capable of cooperating with a WLAN system. The UE 100 determines, on the basis of a determination parameter related to a situation of the UE 1001, whether or not an offload in which the traffic is transitioned to the WLAN system should be performed, when the UE 100 is selected as a target terminal subject to the offload. The UE 100 transmits, to the eNB 200, a rejection notification that related to rejection to the offload when the UE 100 determines that the offload should not be performed.
Abstract:
A radio terminal UE according to one embodiment includes a radio communication unit 210 configured to receive a plurality of parameters including a first parameter for high-speed movement and a second parameter for non-high-speed movement as parameters for processing for switching to a neighboring base station from a base station connected to the radio terminal, and a controller 260 configured to acquire movement speed information indicating a movement speed of the radio terminal and to select a parameter corresponding to the movement speed information. The first parameter is configured to inhibit processing for switching to a Pico base station PeNB which is included in the neighboring base stations.
Abstract:
A communication control is used in a communication system capable of using a plurality of network selection schemes for selecting, from a cellular RAN and a wireless LAN, an access network in which traffic of UE 100 is to be accommodated. The communication control method includes a step of receiving, from the cellular RAN by UE 100 existing in a cell included in the cellular RAN, a network selection configuration related to a network selection scheme decided by the cellular RAN from among the plurality of network selection schemes.