An SAE/LTE or 4G cellular telecommunications network is disclosed which comprises a plurality of eNodeBs and a network core. A plurality of mobile telecommunications devices are registered with the network and communicate with the network core via the eNodeBs. A relay is provided between the eNodeB 5 and the mobile telecommunications device to extend the radio coverage provided by the eNodeB. Channel quality measurement data are transmitted to at least one of the telecommunications devices in a link with the relay to enable the telecommunications devices to calculate the channel quality between the mobile device and the relay and/or the node.