A second User Equipment , hereinafter UE, for intercepting a signal of a first UE in a wireless infrastructure network, the second UE comprising: a first receiver , for intercepting a first uplink signal transmitted by the first UE , the first uplink signal being suitable for reception by a first base station , hereinafter BS, serving the first UE ; a transmitter , for transmitting a second uplink signal suitable for reception by a second base station , hereinafter BS, serving the second UE ; a second receiver , for receiving a first downlink signal from the second BS ; and a processor , configured to: obtain interception-assistance information relating to the first uplink signal, at least a portion of said interception-assistance information originating from the first UE ; control the first receiver to intercept the first uplink signal based on the interception-assistance information; and measure at least one characteristic of the first uplink signal, the processor being further configured to perform one of the following steps: use the measured characteristic to assist in the calculation of a position or a time; and send the measured characteristic to a remote electronic device , for use in assisting a calculation of a position or a time, and wherein the processor is configured to share interception-assistance information, relating to the second UE and/or the second uplink signal, with the first UE before the second uplink signal is transmitted to the second BS, to assist the first UE to intercept the second uplink signal. a first receiver , for intercepting a first uplink signal transmitted by the first UE , the first uplink signal being suitable for reception by a first base station , hereinafter BS, serving the first UE ; a transmitter , for transmitting a second uplink signal suitable for reception by a second base station , hereinafter BS, serving the second UE ; a second receiver , for receiving a first downlink signal from the second BS ; and a processor , configured to: obtain interception-assistance information relating to the first uplink signal, at least a portion of said interception-assistance information originating from the first UE ; control the first receiver to intercept the first uplink signal based on the interception-assistance information; and measure at least one characteristic of the first uplink signal, obtain interception-assistance information relating to the first uplink signal, at least a portion of said interception-assistance information originating from the first UE ; control the first receiver to intercept the first uplink signal based on the interception-assistance information; and measure at least one characteristic of the first uplink signal, the processor being further configured to perform one of the following steps: use the measured characteristic to assist in the calculation of a position or a time; and send the measured characteristic to a remote electronic device , for use in assisting a calculation of a position or a time, use the measured characteristic to assist in the calculation of a position or a time; and send the measured characteristic to a remote electronic device , for use in assisting a calculation of a position or a time, and wherein the processor is configured to share interception-assistance information, relating to the second UE and/or the second uplink signal, with the first UE before the second uplink signal is transmitted to the second BS, to assist the first UE to intercept the second uplink signal. <EOS>