Resource coordination including for full-duplex integrated access and backhaul

Patent metadata

Field	Value
Publication number	US-12245203-B2
Application number	US-202117237187-A
Country	US
Kind code	B2
Filing date	Apr 22, 2021
Priority date	Oct 23, 2020
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

Dynamic frame structure coordination is performed between a parent integrated access and backhaul (IAB) node and child IAB node based on one or more multiplexing options. The parent node sends a dynamic frame structure coordination (DFSC) message to an IAB user equipment function of a child node, indicating that resources are available or released, overriding a semi-statically coordinated and configured downlink/uplink resource pattern. The parent node can make, or the child node can request, the modification. The DFSC message includes multiplexing option(s). The child IAB node's user equipment function communicates the frame structure update to the child node's distributed unit function, which allows the distributed unit function to utilize those resources in accordance with the multiplexing option. Half-duplex, full duplex, frequency division multiplexing and spatial division multiplexing capabilities are considered when selecting the multiplexing option or options for one or more slots identified in the DFSC message.

First claim

What is claimed is:

1. A method, comprising:
determining, by a parent integrated access and backhaul node device comprising a processor, a group of network conditions of a mobile network associated with the parent integrated access and backhaul node device resulting in a first determination, wherein the determining of the group of network conditions comprises determining a group of reference signal received power (RSRP) measurements and a group of cross link interference (CLI) measurements;
determining, by the parent integrated access and backhaul node device, an integrated access and backhaul frame structure for an availability of a slot of slot resources of a backhaul link associated with the parent integrated access and backhaul node device and a child integrated access and backhaul node device resulting in a second determination, wherein the integrated access and backhaul frame structure comprises multiple slots including the slot of the slot resources;
based on the first determination and the second determination, determining, by the parent integrated access and backhaul node device, the availability of the slot of the slot resources of the backhaul link associated with the parent integrated access and backhaul node device and the child integrated access and backhaul node device resulting in a third determination;
based on the third determination, generating a radio resource control (RRC) message that includes an indication that jointly specifies the availability of the slot and a multiplexing option for using the slot by the child integrated access and backhaul node device; and
transmitting, by the parent integrated access and backhaul node device to a user equipment function of the child integrated access and backhaul node device, the RRC message that includes the indication that jointly specifies the availability of the slot and the multiplexing option for using the slot by the child integrated access and backhaul node device.

2. The method of claim 1 , wherein the multiplexing option indicates that only the user equipment function or a distributed unit function of the child integrated access and backhaul node device is operable in the slot.

3. The method of claim 1 , wherein the multiplexing option corresponds to a slot and indicates that the user equipment function and a distributed unit function of the child integrated access and backhaul node device is operable using spatial multiplexing in the slot.

4. The method of claim 1 , wherein the multiplexing option corresponds to a slot and indicates that the user equipment function and a distributed unit function of the child integrated access and backhaul node device is capable of using full duplex operation in the slot.

5. The method of claim 1 , wherein the slot is a first slot, the indication is a first indication, and the multiplexing option is a first multiplexing option corresponding to the first slot, and further comprising, transmitting, by the parent integrated access and backhaul node device to the user equipment function of the child integrated access and backhaul node device, a second indication that jointly specifies an availability of a second slot of the slot resources and a second multiplexing option for using the second slot.

6. The method of claim 5 , wherein the first indication and the second indication are sent in a single message to the user equipment function of the child integrated access and backhaul node device.

7. The method of claim 1 , wherein the transmitting of the indication occurs in response to a request from the user equipment function of the child integrated access and backhaul node device.

8. The method of claim 1 , wherein the multiplexing option indicates that the parent integrated access and backhaul node device is to be downlink transmitting in the slot or is to be uplink receiving in the slot, and indicates whether a distributed unit function is allowed to downlink transmit in the slot, uplink receive in the slot, or is not allowed to transmit or receive in the slot.

9. A parent integrated access and backhaul node device, comprising:
a processor; and
a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, the operations comprising:
determining a group of network conditions of a mobile network associated with the parent integrated access and backhaul node device resulting in a first determination, wherein the determining of the group of network conditions comprises determining a group of reference signal received power (RSRP) measurements and a group of cross link interference (CLI) measurements;
determining an integrated access and backhaul frame structure for an availability of a slot of slot resources of a backhaul link associated with the parent integrated access and backhaul node device and a child integrated access and backhaul node device resulting in a second determination, wherein the integrated access and backhaul frame structure comprises multiple slots including the slot of the slot resources;
based on the first determination and the second determination, performing dynamic frame structure coordination, comprising:
determining the availability of the slot of the slot resources of the backhaul link associated with the parent integrated access and backhaul node device and the child integrated access and backhaul node device resulting in a third determination;
based on the third determination, generating a radio resource control (RRC) message that includes an indication that jointly specifies the availability of the slot and a multiplexing option for using the slot by the child integrated access and backhaul node device; and
communicating, to the child integrated access and backhaul node device, the RRC message that includes the indication that jointly specifies the availability of the slot and the multiplexing option for using the slot by a user equipment function and a distributed unit function of the child integrated access and backhaul node device.

10. The parent integrated access and backhaul node device of claim 9 , wherein the dynamic frame structure coordination modifies a semi-static frame structure configuration.

11. The parent integrated access and backhaul node device of claim 9 , wherein the dynamic frame structure coordination is set for a time period.

12. The parent integrated access and backhaul node device of claim 9 , wherein the dynamic frame structure coordination is set for an indicated frequency resource.

13. The parent integrated access and backhaul node device of claim 9 , wherein the communicating of the indication occurs in response to a request from the child integrated access and backhaul node device.

14. The parent integrated access and backhaul node device of claim 9 , wherein the multiplexing option corresponds to half-duplex operation, full duplex operation, spatial division multiplexing, or frequency division multiplexing.

15. The parent integrated access and backhaul node device of claim 9 , wherein the indication is indicated in a dynamic frame structure coordination message comprising one or more multiplexing options and one or more slots identified in the dynamic frame structure coordination message.

16. A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a child integrated access and backhaul node device, facilitate performance of operations, the operations comprising:
receiving, from a parent integrated access and backhaul node device, a radio resource control (RRC) message that includes an indication that jointly specifies an av

Assignees

• At & T Ip I Lp

Inventors

• Novlan Thomas

Classifications

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04B7/15542

  Selecting at relay station its transmit and receive resources (selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003) · CPC title

• H04L5/16

  Half-duplex systems; Simplex/duplex switching; Transmission of break signals {non-automatically inverting the direction of transmission} · CPC title

• H04L5/0091

  Signalling for the administration of the divided path, e.g. signalling of configuration information · CPC title

• H04W72/0446 Primary

  Resources in time domain, e.g. slots or frames · CPC title