Abstract: A system for restricting access to a mobile communications network by mobile communications devices within a restricted area includes one or more transmitters, one or more designated test mobile communications devices, and an access control entity. The access control entity is arranged to determine, using first measurement data received from one of the designated test mobile communications devices, whether one of the one or more transmitters is positioned correctly and functioning correctly for restricting the access to the mobile communications network by the mobile communications devices in the restricted area. The access control entity is further arranged to decide, based on second measurement data received from a second mobile communications device which is not a designated test mobile communications device, whether or not to provide the second mobile communication device with access to a service of the mobile communications network.

Abstract: There is described a system for restricting access to a mobile communications network for mobile communication devices within a restricted area. The system includes at least one transmitter operable to transmit a beacon signal for reception by mobile communication devices within the restricted area and an access control entity, communicable with the mobile communication device via a base station. The access control entity instructs a mobile communication device to perform at least one measurement of the beacon signal from each transmitter and then to provide measurement data corresponding to the performed measurement to the access control entity. The access control entity then analyses the measurement data provided by the mobile communication device and based on that analysis decides whether or not to provide the mobile communication device with access to a service of the mobile communications network.

Abstract: A system for restricting access to a mobile communications network by mobile communications devices within a restricted area includes one or more transmitters, one or more designated test mobile communications devices, and an access control entity. The access control entity is arranged to determine, using first measurement data received from one of the designated test mobile communications devices, whether one of the one or more transmitters is positioned correctly and functioning correctly for restricting the access to the mobile communications network by the mobile communications devices in the restricted area. The access control entity is further arranged to decide, based on second measurement data received from a second mobile communications device which is not a designated test mobile communications device, whether or not to provide the second mobile communication device with access to a service of the mobile communications network.

Abstract: There is described a system for restricting access to a mobile communications network for mobile communication devices within a restricted area. The system comprises at least one transmitter operable to transmit a beacon signal for reception by mobile communication devices within the restricted area and an access control entity, communicable with the mobile communication device via a base station. The access control entity instructs a mobile communication device to perform at least one measurement in regard of the beacon signal from each transmitter and then to provide measurement data corresponding to said performed measurement to the access control entity. The access control entity then analyses the measurement data provided by the mobile communication device and based on that analysis decides whether or not to provide the mobile communication device with access to a service of the mobile communications network.

Abstract: There is described a system for restricting access to a mobile communications network for mobile communication devices within a restricted area. The system comprises at least one transmitter operable to transmit a beacon signal for reception by mobile communication devices within the restricted area and an access control entity, communicable with the mobile communication device via a base station. The access control entity instructs a mobile communication device to perform at least one measurement in regard of the beacon signal from each transmitter and then to provide measurement data corresponding to said performed measurement to the access control entity. The access control entity then analyses the measurement data provided by the mobile communication device and based on that analysis decides whether or not to provide the mobile communication device with access to a service of the mobile communications network.

Abstract: There is described a system for restricting access to a mobile communications network for mobile communication devices within a restricted area. The system comprises at least one transmitter operable to transmit a beacon signal for reception by mobile communication devices within the restricted area and an access control entity, communicable with the mobile communication device via a base station. The access control entity instructs a mobile communication device to perform at least one measurement in regard of the beacon signal from each transmitter and then to provide measurement data corresponding to said performed measurement to the access control entity. The access control entity then analyses the measurement data provided by the mobile communication device and based on that analysis decides whether or not to provide the mobile communication device with access to a service of the mobile communications network.

Abstract: There is discussed a method of transmitting data from a first network device to a second network device using a plurality of network links. The method comprises the first network device sending first data to the second network device over a first network link at a first transmission time and sending second data to the second network device over a second network link at a second transmission time. The first network device receives from the second network device an indication of the time difference between reception of the first data over the first network link and reception of the second data over the second network link.