| CPC H04W 56/0015 (2013.01) [H04W 56/0005 (2013.01); H04W 56/005 (2013.01); H04W 56/009 (2013.01)] | 14 Claims |
|
1. A method comprising:
a primary node transmitting a first message to a secondary node, the primary node including a radio, the secondary node including a radio;
the primary node transmitting an indication of a transmission time of the first message to the secondary node;
the secondary node transmitting a second message to the primary node;
the primary node transmitting a third message to the secondary node;
the primary node transmitting an indication of a transmission time of the third message to the secondary node;
the secondary node calculating a rate of a clock of the secondary node relative to a clock of the primary node using a ratio of a time difference between the transmission time of the first message and the transmission time of the third message by the primary node to a time difference between a reception time of the first message and a reception time of the third message by the secondary node;
the secondary node calculating a time offset of the clock of the secondary node relative to the clock of the primary node using the calculated rate, a value of a propagation delay between the primary node and the secondary node and one of the indication of the transmission time of the first message or the indication of the transmission time of the third message; and
synchronizing the clock of the secondary node with the clock of the primary node.
|