Dynamic resource allocation in wireless network
Backhaul resources may be allocated to different wireless communication links between different base stations, and local redistribution of resources among base stations may be utilized to account for variations in signal quality and/or variations in traffic experienced by different nodes of the backhaul network. A first access node function (ANF) may determine a need for additional backhaul resources, and may transmit a request message to one or more user equipment functions (UEFs) for additional backhaul resources. A UEF that receives the request message may forward the request to an associated second ANF. The second ANF, if it has backhaul resources available that the first ANF can use, may send a response to the first ANF, via the associated UEF, and the first ANF may use the additional resources that were originally allocated to the second ANF.
1. An apparatus for wireless communication at a first access node in an integrated access and backhaul (IAB) network, comprising:
a memory; and
a processor coupled with the memory and configured to cause the apparatus to:
transmit, to a node function at another access node in the IAB network, a request for backhaul resources for a period of time;
receive a plurality of resources that are pre-allocated among a plurality of node functions in the IAB network, wherein the first access node comprises a first node function and a second node function different from the first node function; and
receive, at the first node function of the first access node, an availability indication of one or more available resources for backhaul communication from the plurality of resources, wherein the one or more available resources are available for the requested period of time after being pre-allocated, for backhaul communication, to an additional node function associated with a second access node associated with the IAB network, wherein the plurality of node functions includes the first node function, the second node function, and the additional node function.
2. The apparatus of claim 1 , wherein the plurality of resources that are pre-allocated is received via signaling different from signaling associated with the availability indication of the one or more available resources.
3. The apparatus of claim 1 , wherein the plurality of resources that are pre-allocated is received via radio resource control (RRC) signaling.
4. The apparatus of claim 1 , wherein the availability indication of the one or more available resources is received via a downlink control channel.
5. The apparatus of claim 1 , wherein the availability indication comprises an indication that the one or more available resources correspond to time-multiplexed resources.
6. The apparatus of claim 1 , wherein the availability indication comprises an indication that the one or more available resources correspond to frequency-multiplexed resources.
7. The apparatus of claim 1 , wherein the availability indication comprises an indication that the one or more available resources correspond to spatially-multiplexed resources.
8. The apparatus of claim 1 , wherein the processor is further configured to cause the apparatus to:
select at least one resource from the one or more available resources; and
transmit backhaul data using the at least one resource.
9. The apparatus of claim 8 , wherein the processor is further configured to cause the apparatus to:
select the at least one resource based at least in part on managing inter-link interference.
10. The apparatus of claim 8 , wherein the processor is further configured to cause the apparatus to:
select the at least one resource based at least in part on inter-node beam coordination.
11. The apparatus of claim 1 , wherein, to transmit the request for backhaul resources, the processor is configured to cause the apparatus to:
transmit a request message comprising an indication of a type of resources requested.
12. The apparatus of claim 1 , wherein the processor is further configured to cause the apparatus to:
forward, from the second node function of the first access node, the availability indication to one or more other access nodes associated with the IAB network.
13. The apparatus of claim 1 , wherein the processor is further configured to cause the apparatus to:
restrict resource shifting of at least one resource from the plurality of resources that are pre-allocated.
14. The apparatus of claim 1 , wherein the plurality of resources that are pre-allocated comprises at least one resource associated with a directional beam.
15. The apparatus of claim 1 , wherein the availability indication of the one or more available resources is received from an access node function (ANF) of the second access node, wherein the ANF is the additional node function.
16. The apparatus of claim 1 , wherein the first node function comprises a user equipment function (UEF) and the second node function comprises an access node function (ANF).
17. The apparatus of claim 1 , wherein the first access node comprises a first base station and the second access node comprises a second base station.
18. A method for wireless communication at a first access node in an integrated access and backhaul (IAB) network, comprising:
transmitting, to a node function at another access node in the IAB network, a request for backhaul resources for a period of time;
receiving, by the first access node, a plurality of resources that are pre-allocated among a plurality of node functions in the IAB network, wherein the first access node comprises a first node function and a second node function different from the first node function; and
receiving, at the first node function of the first access node, an availability indication of one or more available resources for backhaul communication from the plurality of resources, wherein the one or more available resources are available for the requested period of time after being pre-allocated, for backhaul communication, to an additional node function associated with a second access node associated with the IAB network, wherein the plurality of node functions includes the first node function, the second node function, and the additional node function.
19. The method of claim 18 , wherein the plurality of resources that are pre-allocated is received via signaling different from signaling associated with the availability indication of the one or more available resources.
20. A non-transitory computer-readable medium storing code for wireless communication at a first access node in an integrated access and backhaul (IAB) network, the code comprising instructions executable by a processor to:
transmit, to a node function at another access node in the IAB network, a request for backhaul resources for a period of time;
receive, by the first access node, a plurality of resources that are pre-allocated among a plurality of node functions in the IAB network, wherein the first access node comprises a first node function and a second node function different from the first node function; and
receive, at the first node function of the first access node, an availability indication of one or more available resources for backhaul communication from the plurality of resources, wherein the one or more available resources are available for the requested period of time after being pre-allocated, for backhaul communication, to an additional node function associated with a second access node associated with the IAB network, wherein the plurality of node functions includes the first node function, the second node function, and the additional node function.