A MASTER BASE STATION DEVICE CONFIGURED TO PROVIDE CONTROL PLANE CONNECTIVITY TO A USER DEVICE WHILST USER PLANE CONNECTIVITY IS PROVIDED TO THE USER DEVICE BY A SECONDARY BASE STATION DEVICE

摘要

There is provided a system in which a user device communicates control data to a first (master) base station (MeNB) and user data to a second (secondary) base station (SeNB). The user device can receive from the first (master) base station MeNB the configuration data specific to the first (master) base station MeNB and the configuration data specific to the second (secondary) base station SeNB And receives configuration data. The MeNB is adapted to provide control plane connectivity to the user device while the user plane connectivity is provided by the SeNB to the user device, the MeNB comprises a base station interface for communicating with the SeNB, and a control associated with the user device from the SeNB via the base station interface Wherein the control data is for initiating a counter check procedure for a radio bearer associated with the user device and terminated at the SeNB and wherein the control data is transmitted by another device (e.g., by an intruder ) At least one count value indicating the amount of data to be transmitted to or received from the user device on the radio bearer for use in checking for packet insertion, And to generate a counter check control message including at least one count value for transmission to the user device to cause the counter check procedure to be performed, And a transceiver circuitry for receiving a counter-check response from the device. In a different embodiment, when the MeNB is adapted to provide control plane connectivity to the user device while the user plane connectivity is provided by the SeNB to the user device, the MBMS service may be implemented on the user device according to its interest (MBMS Indication Indication Message) .