Enhancements for provided guard signals in IAB network
An integrated access and backhaul (IAB) node may 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, determining to 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 the distributed unit of the child IAB node, and determine a number of guard symbols provided by the parent IAB node at the transition time based on whether the parent knowledge message indicates that the parent IAB node has received the optional signaling message.
1. A method of wireless communication at a child integrated access and backhaul (IAB) node, comprising:
receiving 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;
performing 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.
2. The method of claim 1 , wherein the parent knowledge message identifies a selected rule for determination of potential transition instances from a pre-defined list of rules based on the optional signaling message.
3. The method of claim 1 , wherein the optional signaling message identifies a resource configuration of the child IAB node to the parent IAB node or identifies an allocation of cell specific signal of the child IAB node to the parent IAB node.
4. The method of claim 1 , wherein the parent knowledge message is received from the parent IAB node.
5. The method of claim 4 , wherein the parent knowledge message is carried by a media access control control element (MAC-CE).
6. The method of claim 5 , wherein the MAC-CE indicates guard symbols provided by the parent node.
7. The method of claim 1 , wherein the parent knowledge message is received from a central unit of a IAB donor.
8. The method of claim 7 , wherein the parent knowledge message is carried by a F1-AP message.
9. The method of claim 7 , wherein the parent knowledge message is carried by a radio resource control (RRC) message.
10. The method of claim 1 , further comprising providing a number of guard symbols at the transition time, the number of guard symbols being based on the determined number of guard symbols provided by the parent IAB node.
11. 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.
12. The apparatus of claim 11 , wherein the parent knowledge message identifies a selected rule for determination of potential transition instances from a pre-defined list of rules based on the optional signaling message.
13. The apparatus of claim 11 , wherein the optional signaling message identifies a resource configuration of the child IAB node to the parent IAB node or identifies an allocation of cell specific signal of the child IAB node to the parent IAB node.
14. The apparatus of claim 11 , wherein the parent knowledge message is received from the parent IAB node.
15. The apparatus of claim 14 , wherein the parent knowledge message is carried by a media access control control element (MAC-CE).
16. The apparatus of claim 15 , wherein the MAC-CE indicates guard symbols provided by the parent node.
17. The apparatus of claim 11 , wherein the parent knowledge message is received from a central unit of a IAB donor.
18. The apparatus of claim 17 , wherein the parent knowledge message is carried by a F1-AP message.
19. The apparatus of claim 17 , wherein the parent knowledge message is carried by a radio resource control (RRC) message.
20. The apparatus of claim 11 , wherein the at least one processor is further configured to provide a number of guard symbols at the transition time, the number of guard symbols being based on the determined number of guard symbols provided by the parent IAB node.
21. 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.
22. The apparatus of claim 21 , wherein the optional signaling message identifies a resource configuration of the child IAB node to the parent IAB node or identifies an allocation of cell specific signal of the child IAB node to the parent IAB node.
23. The apparatus of claim 21 , wherein the parent knowledge message is carried by a media access control control element (MAC-CE).
24. The apparatus of claim 23 , wherein the MAC-CE indicates guard symbols provided by the parent node.
25. The apparatus of claim 21 , wherein the parent knowledge message identifies a selected rule for determination of potential transition instances from a pre-defined list of rules based on the optional signaling message.
26. 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.
27. The method of claim 26 , wherein the optional signaling message identifies a resource configuration of the child IAB node to the parent IAB node or identifies an allocation of cell specific signal of the child IAB node to the parent IAB node.
28. The method of claim 26 , wherein the parent knowledge message is carried by a media access control control element (MAC-CE).
29. The method of claim 28 , wherein the MAC-CE indicates guard symbols provided by the parent node.