Timing advance for rach-less backhaul handover

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code;
• the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
• measure a timing of a first signal received from a second node of a wireless network to produce a measurement result;
• generate a timing advance value based on the measurement result and an uplink reception reference time of the apparatus;
• send the timing advance value to the second node;
• and
• receive a second signal from the second node, wherein transmission of the second signal is at a time advanced by the timing advance value with respect to a downlink transmission reference time of the second node.

An apparatus comprising:

• at least one processor;
• and
• at least one memory including computer program code;
• the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:
• measure a timing of a first signal received from a second node of a wireless network to produce a measurement result;
• generate a timing advance value based on the measurement result and a downlink transmission reference time of the wireless network;
• and
• transmit a second signal to the second node at a time advanced by the timing advance value with respect to a reception reference time of the second node.

A method, comprising:

• measuring, by a first node of a wireless network, a timing of a first signal received from a second node of the wireless network to produce a measurement result;
• generating, by the first node, a timing advance value based on the measurement result and an uplink reception reference time of the first node;
• sending the timing advance value to the second node;
• and
• receiving, by the first node, a second signal from the second node, wherein transmission of the second signal is at a time advanced by the timing advance value with respect to a downlink transmission reference time of the second node.