LOCATION SERVER, INFRASTRUCTURE EQUIPMENT, COMMUNICATIONS DEVICE AND METHODS FOR THE USE OF SUPPLEMENTARY POSTIONING REFERENCE SIGNALS

摘要

A location server is configured to determine a location of communications devices with respect to a location of infrastructure equipment of a wireless access network from observed time differences between receiving positioning reference signals transmitted by a plurality of the infrastructure equipment and received by the communications devices. The location server. The location server is connected by a connecting interface to the wireless communications network, the connecting interface being configured to receive reports of the observed time differences from the communications devices and to transmit control information to the plurality of the infrastructure equipment. The location server is configured to transmit control information to the plurality of infrastructure equipment via the connecting interface to cause the plurality of infrastructure equipment to transmit supplementary positioning reference signals to one or more of the communications devices which are selected by the location server for generating additional observed time difference reports from the supplementary positioning reference signals by the selected one or more communications devices to assist the location server in determining the location of the selected one or more communications devices.