Resource partitioning between access and backhaul communication links
Methods, systems, and devices for wireless communications are described that provide for partitioning of time-frequency resources for access and backhaul links separately. A centralized scheduler in a centralized system or a set of access nodes (ANs) in a distributed system may allocate a portion of a set of resources for a given link type (e.g., access or backhaul). In some cases, multiple ANs may exchange reports or measurements to determine the resources to allocate to a given link type. The allocated resources may be repurposed for use by a different link type (e.g., access resources may be repurposed and used for backhaul resources) in order to account for varying traffic conditions.
1. A method for wireless communications, comprising:
identifying a first set of time-frequency resources reserved for communications of a first link type, wherein the first link type comprises one of a backhaul link or an access link;
communicating with a wireless device in a communications network via a channel associated with the first link type using the first set of time-frequency resources;
communicating with a scheduler or an access node of the communications network to repurpose a subset of the first set of time-frequency resources for communications of a second link type different from the first link type; and
using time-frequency resources included in the subset of the first set of time-frequency resources to communicate with at least a first network node in the communications network via a second channel associated with the second link type.
2. The method of claim 1 , further comprising:
identifying a second set of time-frequency resources reserved for communications of the second link type different from the first link type; and
communicating with at least a second network node in the communications network via the second channel associated with the second link type using the second set of time-frequency resources, wherein the second network node is the same network node or a different network node than the first network node.
3. The method of claim 2 , further comprising:
receiving a resource configuration with at least one of the set of time-frequency resources, the subset of time-frequency resources, or the second set of time-frequency resources.
4. The method of claim 2 , further comprising:
receiving a report from the wireless device or a neighboring access node of the communications network; and
determining at least one of the first set of time-frequency resources reserved for communications of the first link type or the second set of time-frequency resources for communication of the second link type based at least in part on the report.
5. The method of claim 2 , further comprising:
transmitting an indication of at least one of the first set of time-frequency resources or the second set of time-frequency resources.
6. The method of claim 2 , further comprising:
transmitting an indication of time-frequency resources associated with a network node and reserved for communications of the first link type.
7. The method of claim 2 , further comprising:
transmitting, to the scheduler in the communications network, a request for resources for communications of the first link type or the second link type; and
receiving, from the scheduler, a response to the request for resources that indicates the first set of time-frequency resources reserved for communications of the first link type or the second set of time-frequency resources reserved for communications of the second link type.
8. The method of claim 2 , wherein the second set of time-frequency resources and the first set of time-frequency resources at least partially overlap.
9. The method of claim 2 , wherein the first set of time-frequency resources is associated with a first set of spatial or code resources and the second set of time-frequency resources is associated with a second set of spatial or code resources different from the first set of spatial or code resources.
10. The method of claim 1 , further comprising:
receiving a resource configuration from the wireless device, a network node, another wireless device, or the scheduler of the communications network.
11. The method of claim 1 , further comprising:
receiving at least one report from the wireless device or a neighboring access node in the communications network, wherein the report comprises a buffer status report, a channel quality measurement report, a beam quality measurement report, an interference measurement report, or any combination thereof; and
determining the first set of time-frequency resources reserved for communications of the first link type based at least in part on the at least one report.
12. The method of claim 1 , further comprising:
transmitting an indication of the set of time-frequency resources.
13. The method of claim 1 , further comprising:
transmitting an indication of time-frequency resources associated with a network node and reserved for communications of the first link type.
14. The method of claim 1 , further comprising:
transmitting, to the scheduler in the communications network, a request for resources for communications of the first link type; and
receiving, from the scheduler, a response to the request for resources that indicates the set of first time-frequency resources reserved for communications of the first link type.
15. The method of claim 1 ,
wherein communicating with the scheduler or the access node of the communications network to repurpose the subset of the first set of time-frequency resources for communications of the second link type different from the first link type comprises transmitting, to the scheduler or the access node of the communications network, a repurposing message to repurpose at least a portion of the first set of time-frequency resources; and
receiving, from the scheduler or the access node of the communications network, a repurposing response message that indicates the subset of the first set of time-frequency resources reserved for communications of the second link type.
16. The method of claim 1 , wherein the first set of time-frequency resources is associated with a first set of spatial or code resources.
17. The method of claim 1 , wherein the first set of time-frequency resources are reserved for one of control traffic, data traffic, or broadcast signaling, and for one of downlink communications or uplink communications.
18. The method of claim 1 , wherein the first set of time-frequency resources is based at least in part on a preconfigured resource allocation scheme for the communications network.
19. A method for wireless communications, comprising:
allocating a first set of time-frequency resources reserved for communications of a first link type, wherein the first link type comprises one of a backhaul link or an access link;
transmitting, to an access node in a communications network, a resource configuration that conveys the first set of time-frequency resources;
receiving, from the access node, a repurposing message to repurpose at least a portion of the first set of time-frequency resources for communications of a second link type different from the first link type; and
transmitting, to the access node of the communications network, a repurposing response message that indicates a subset of the first set of time-frequency resources reserved for communications of the second link type.
20. The method of claim 19 , further comprising:
identifying a second set of time-frequency resources reserved for communications of a second link type different from the first link type, wherein the resource configuration conveys at least one of the first set of time-frequency resources or the second set of time-frequency resources.
21. The method of claim 20 , wherein the second set of time-frequency resources and the first set of time-frequency resources at least partially overlap.
22. The method of claim 20 , wherein the first set of time-frequency resources is associated with a first set of spatial or code resources and the second set of time-frequency resources is associated with a second set of spatial or code resources different from the first set of spatial or code resources.
23. The method of claim 19 , further comprising:
receiving, from the access node, a request for resources for communications of the first link type; and
reserving the first set of time-frequency resources for communications of the first link type based at least in part on the request for resources.
24. The method of claim 19 , further comprising:
receiving, from the access node, a report corresponding to one or more devices in the communications network, wherein the report comprises a buffer status report, a channel quality measurement report, a beam quality measurement report, an interference measurement report, or any combination thereof; and
reserving the first set of time-frequency resources for communications of the first link type based at least in part on the report.
25. The method of claim 19 , wherein the first set of time-frequency resources is associated with a first set of spatial or code resources.
26. The method of claim 19 , wherein the first set of time-frequency resources are reserved for one of control traffic, data traffic, or broadcast signaling, and for one of downlink communications or uplink communications.
27. The method of claim 19 , wherein the first set of time-frequency resources is based at least in part on a preconfigured resource allocation scheme for the communications network.
28. An apparatus for wireless communications, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
identify a first set of time-frequency resources reserved for communications of a first link type, wherein the first link type comprises one of a backhaul link or an access link;
communicate with a wireless device in a communications network via a channel associated with the first link type using the first set of time-frequency resources;
communicate with a scheduler or an access node of the communications network to repurpose a subset of the first set of time-frequency resources for communications of a second link type different from the first link type; and
use time-frequency resources included in the subset of the first set of time-frequency resources to communicate with at least a first network node in the communications network via a second channel associated with the second link type.
29. An apparatus for wireless communications, comprising:
a processor;
memory in electronic communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
allocate a first set of time-frequency resources reserved for communications of a first link type, wherein the first link type comprises one of a backhaul link or an access link;
transmit, to an access node in a communications network, a resource configuration that conveys the first set of time-frequency resources;
receive, from the access node, a repurposing message to repurpose at least a portion of the first set of time-frequency resources for communications of a second link type different from the first link type; and
transmit, to the access node of the communications network, a repurposing response message that indicates a subset of the first set of time-frequency resources reserved for communications of the second link type.