Enhancements for provided guard signals in IAB network

An apparatus for wireless communication at a child integrated access and backhaul (IAB) node, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive a parent knowledge message, the parent knowledge message indicating whether a parent IAB node of the child IAB node has received an optional signaling message;
• perform a transition between first resources and second resources at a transition time, the first resources being associated with use of a mobile termination of the child IAB node, the second resources being associated with use of a distributed unit of the child IAB node;
• and
• wherein a number of guard symbols provided by the parent IAB node at the transition time is based on whether the parent knowledge message indicates that the parent IAB node has received the optional signaling message.

An apparatus for wireless communication at a parent integrated access and backhaul (IAB) node, comprising:

• a memory;
• and
• at least one processor coupled to the memory and configured to:
• receive an optional signaling message from a central unit of an IAB donor;
• transmit, to a child IAB node, a parent knowledge message indicating that the parent IAB node has received the optional signaling message;
• and
• provide a number of guard symbols at a transition time of the child IAB node, the number of guard symbols being based on the optional signaling message.

A method of wireless communication at a parent integrated access and backhaul (IAB) node, comprising:

• receiving an optional signaling message from a central unit of an IAB donor;
• transmitting, to a child IAB node, a parent knowledge message indicating that the parent IAB node has received the optional signaling message;
• and
• providing a number of guard symbols at a transition time of the child IAB node, the number of guard symbols being based on the optional signaling message.