Physical cell identifier (PCI) selection based on primary synchronization signal (PSS) waveform
Aspects relate to a physical cell identifier (PCI) change within a wireless network based on a primary synchronization signal (PSS) waveform. A scheduling entity, such as an integrated-access-backhaul (IAB) node within a radio access network (RAN), may communicate with a set of one or more scheduled entities, such as other IAB nodes and/or user equipment (UEs), utilizing a first PCI. The scheduling entity may then change from the first PCI to a second PCI, where the second PCI corresponds to a different PSS waveform than the first PCI. In some examples, the scheduling entity may change the PCI as a result of a PCI collision and/or PSS collision with a neighboring scheduling entity.
1. A method of wireless communication at a first scheduling entity, comprising:
communicating with a set of one or more scheduled entities utilizing a first physical cell identifier (PCI); and
changing from the first PCI corresponding to a first primary synchronization signal (PSS) waveform to a second PCI corresponding to a second PSS waveform different than the first PSS waveform to communicate with the set of one or more scheduled entities.
2. The method of claim 1 , further comprising:
detecting a collision between the first PSS waveform and a third PSS waveform transmitted by a second scheduling entity located proximate to the first scheduling entity; and
selecting the second PCI to avoid colliding with the third PSS waveform.
3. The method of claim 2 , wherein a first coverage area of the first scheduling entity and a second coverage area of the second scheduling entity at least partially overlap.
4. The method of claim 2 , wherein the first PSS waveform and the third PSS waveform are identical.
5. The method of claim 2 , further comprising:
detecting a collision between the first PCI and a third PCI utilized by the second scheduling entity, wherein the first PCI and the third PCI are identical, wherein the collision between the first PCI and the third PCI produces the collision between the first PSS waveform and the third PSS waveform.
6. The method of claim 2 , further comprising:
transmitting a message comprising a PCI change notification to a centralized network node upon changing to the second PCI, wherein the PCI change notification comprises the second PCI.
7. The method of claim 6 , wherein the first scheduling entity comprises a first integrated-access-backhaul (IAB) node distributed unit and the centralized network node comprises an IAB donor node central unit.
8. The method of claim 1 , further comprising:
receiving a PCI change indication comprising the second PCI from a centralized network node.
9. The method of claim 8 , further comprising:
transmitting a PCI change request to the centralized network node, requesting the second PCI.
10. The method of claim 8 , wherein the first scheduling entity comprises a first integrated-access-backhaul (IAB) node and the centralized network node comprises an IAB donor node central unit.
11. A first scheduling entity within a wireless communication network, comprising:
a transceiver configured to communicate with a set of one or more scheduled entities in the wireless communication network;
a memory; and
a processor communicatively coupled to the transceiver and the memory, the processor and the memory configured to:
communicate with the set of one or more scheduled entities utilizing a first physical cell identifier (PCI) via the transceiver; and
change from the first PCI corresponding to a first primary synchronization signal (PSS) waveform to a second PCI corresponding to a second PSS waveform different than the first PSS waveform to communicate with the set of one or more scheduled entities.
12. The first scheduling entity of claim 11 , wherein the processor and the memory are further configured to:
detect a collision between the first PSS waveform and a third PSS waveform transmitted by a second scheduling entity located proximate to the first scheduling entity; and
select the second PCI to avoid colliding with the third PSS waveform.
13. The first scheduling entity of claim 12 , wherein a first coverage area of the first scheduling entity and a second coverage area of the second scheduling entity at least partially overlap.
14. The first scheduling entity of claim 12 , wherein the first PSS waveform and the third PSS waveform are identical.
15. The first scheduling entity of claim 12 , wherein the processor and the memory are further configured to:
detect a collision between the first PCI and a third PCI utilized by the second scheduling entity, wherein the first PCI and the third PCI are identical, wherein the collision between the first PCI and the third PCI produces the collision between the first PSS waveform and the third PSS waveform.
16. The first scheduling entity of claim 12 , wherein the processor and the memory are further configured to:
transmit a message comprising a PCI change notification to a centralized network node upon changing to the second PCI, wherein the PCI change notification comprises the second PCI.
17. The first scheduling entity of claim 16 , wherein the first scheduling entity comprises a first integrated-access-backhaul (IAB) node distributed unit and the centralized network node comprises an IAB donor node central unit.
18. The first scheduling entity of claim 11 , wherein the processor and the memory are further configured to:
receive a PCI change indication comprising the second PCI from a centralized network node.
19. The first scheduling entity of claim 18 , wherein the processor and the memory are further configured to:
transmit a PCI change request to the centralized network node, requesting the second PCI.
20. The first scheduling entity of claim 18 , wherein the first scheduling entity comprises a first integrated-access-backhaul (IAB) node and the centralized network node comprises an IAB donor node central unit.
21. A method of wireless communication at a centralized network node, comprising:
detecting a collision between a first primary synchronization signal (PSS) waveform corresponding to a first physical cell identifier (PCI) assigned to a first scheduling entity and a second PSS waveform corresponding to a second PCI assigned to a second scheduling entity located proximate to the first scheduling entity;
selecting a third PCI for the first scheduling entity, wherein the third PCI corresponds to a third PSS waveform different than the first PSS waveform to avoid colliding with the second PSS waveform; and
transmitting a PCI change indication comprising the third PCI to the first scheduling entity to initiate a change from the first PCI to the third PCI within the first scheduling entity.
22. The method of claim 21 , wherein a first coverage area of the first scheduling entity and a second coverage area of the second scheduling entity at least partially overlap.
23. The method of claim 21 , wherein the first PSS waveform and the second PSS waveform are identical.
24. The method of claim 21 , further comprising:
detecting a collision between the first PCI and the second PCI, wherein the first PCI and the second PCI are identical, wherein the collision between the first PCI and the second PCI produces the collision between the first PSS waveform and the second PSS waveform.
25. The method of claim 21 , wherein the first scheduling entity comprises a first integrated-access-backhaul (IAB) node, the second scheduling entity comprises a second IAB node and the centralized network node comprises an IAB donor node central unit.
26. A centralized network node within a wireless communication network, comprising:
a transceiver;
a memory; and
a processor communicatively coupled to the transceiver and the memory, the processor and the memory configured to:
detect a collision between a first primary synchronization signal (PSS) waveform corresponding to a first physical cell identifier (PCI) assigned to a first scheduling entity and a second PSS waveform corresponding to a second PCI assigned to a second scheduling entity located proximate to the first scheduling entity;
select a third PCI for the first scheduling entity, wherein the third PCI corresponds to a third PSS waveform different than the first PSS waveform to avoid colliding with the second PSS waveform; and
transmit a PCI change indication comprising the third PCI to the first scheduling entity to initiate a change from the first PCI to the third PCI within the first scheduling entity.
27. The centralized network node of claim 26 , wherein a first coverage area of the first scheduling entity and a second coverage area of the second scheduling entity at least partially overlap.
28. The centralized network node of claim 26 , wherein the first PSS waveform and the second PSS waveform are identical.
29. The centralized network node of claim 26 , wherein the processor and the memory are further configured to:
detect a collision between the first PCI and the second PCI, wherein the first PCI and the second PCI are identical, wherein the collision between the first PCI and the second PCI produces the collision between the first PSS waveform and the second PSS waveform.
30. The centralized network node of claim 26 , wherein the first scheduling entity comprises a first integrated-access-backhaul (IAB) node, the second scheduling entity comprises a second IAB node and the centralized network node comprises an IAB donor node central unit.