Frequency domain resource configuration in iab

Patent metadata

Field	Value
Publication number	US-2023134743-A1
Application number	US-202117917521-A
Country	US
Kind code	A1
Filing date	Apr 6, 2021
Priority date	Apr 6, 2020
Publication date	May 4, 2023
Grant date	—

Abstract

Systems and methods are disclosed herein for frequency domain resource configuration in an Integrated Access and Backhaul (IAB) node. In one embodiment, a method performed by an IAB node configured to operate in a spectrum band comprises receiving a configuration message(s) related to the spectrum band comprising information that defines two or more modes of operation of a distributed unit (DU) of the IAB node that are allowed for two or more subsets of a plurality of subcarriers within the spectrum band of the IAB node, respectively. The method further comprises allocating at least one of the subsets of the plurality of subcarriers within the spectrum band for performing an operation based on a mode of operation of the IAB node and the information comprised in the configuration message(s) and performing the operation on the allocated at least one of the subsets of the plurality of subcarriers.

First claim

1 . A method performed by an Integrated Access and Backhaul node configured to operate in a spectrum band, the method comprising:
receiving one or more configuration messages related to the spectrum band, the one or more configuration messages comprising information that defines two or more modes of operation of a distributed unit of the IAB node that are allowed for two or more subsets of a plurality of subcarriers within the spectrum band of the IAB node, respectively; based on a mode of operation of the IAB node and the information comprised in the configuration message(s), allocating at least one of the two or more subsets of the plurality of subcarriers within the spectrum band for performing an operation; and performing the operation on the allocated at least one of the two or more subsets of the plurality of subcarriers.

2 . The method of claim 1 , wherein the two or more subsets of the plurality of subcarriers within the spectrum band of the IAB node are mutually exclusive.

3 . The method of claim 1 , wherein the two or more modes of operation comprise two or more of the following modes of operation:
a first mode of operation in which DU transmission, DU reception, or either DU transmission or DU reception may be performed by the IAB node; a second mode of operation in which DU transmission, DU reception, or either DU transmission or DU reception may be performed by the IAB node, subject to a condition; a third mode of operation in which neither DU transmission nor DU reception may be performed by the IAB node.

4 . The method of claim 3 , wherein the two or more modes of operation comprise the second mode of operation, and the condition depends on:
(a) whether the subset of the subcarriers configured for the second mode of operation are configured as unavailable for the DU of a parent IAB node or not used on a mobile termination, MT, side of the IAB node; (b) whether the IAB node has received a control message that indicates that the subset of the subcarriers configured for the second mode of operation are available for transmission or reception; (c) whether operation on the MT side of the IAB is not impacted; or (d) a combination of two or more of (a)-(c).

5 . The method of claim 3 , where the operation performed by the IAB node depends on a symbol configuration of symbol in which the operation is to be performed within in a slot.

6 . The method of claim 5 , wherein the symbol configuration is one of:
a configuration of the symbol as an uplink symbol in which case the operation is reception by the DU of the IAB node, a configuration of the symbol as a downlink symbol in which case the operation is transmission by the DU of the IAB node, or a configuration of the symbol as a flexible symbol in which case the operation is reception or transmission by the DU of the IAB node.

7 . The method of claim 6 , wherein the operation performed by the IAB node is:
transmitting by the DU of the IAB node, if the symbol in which the operation is to be performed is a downlink symbol and the mode of operation is either: (a) the first mode of operation or (b) the second mode of operation provided the condition is met; receiving by the DU of the IAB node, if the symbol in which the operation is to be performed is an uplink symbol and the mode of operation is either: (a) the first mode of operation or (b) the second mode of operation provided the condition is met; transmitting or receiving by the DU of the IAB node, if the symbol in which the operation is to be performed is a flexible symbol and the mode of operation is either: (a) the first mode of operation or (b) the second mode of operation provided the condition is met; or neither transmitting nor receiving by the DU of the IAB node, if the mode of operation is the third mode of operation.

8 . The method of claim 7 , wherein the operation performed by the IAB node further involves control signaling to schedule a User Equipment and/or a child IAB node to transmit or receive in a certain time-frequency resource according to the configurations of a symbol(s) in which the operation is to be performed by the IAB node and the allocated at least one of the two or more subsets of the plurality of subcarriers.

9 . The method of claim 1 , further comprising, prior to receiving the one or more configuration messages, transmitting a capability message to a parent IAB node.

10 . The method of claim 9 , wherein the capability message comprises information that indicates that the IAB node has digital beamforming capability for Spatial Division Multiplexing (SDM).

11 . The method of claim 9 , wherein the capability message comprises information that indicates that the IAB node has a capability to partition the frequency spectrum according to the two or more modes of operation.

12 - 13 . (canceled)

14 . An Integrated Access and Backhaul node configured to operate in a spectrum band, the IAB node comprising a radio unit and processing circuitry configured to cause the IAB node to:
receive one or more configuration messages related to the spectrum band, the one or more configuration messages comprising information that defines two or more modes of operation of a distributed unit of the IAB node that are allowed for two or more subsets of a plurality of subcarriers within the spectrum band of the IAB node, respectively; based on a mode of operation of the IAB node and the information comprised in the configuration message(s), allocate at least one of the two or more subsets of the plurality of subcarriers within the spectrum band for performing an operation; and perform the operation on the allocated at least one of the two or more subsets of the plurality of subcarriers.

15 - 17 . (canceled)

18 . The IAB node of claim 14 , wherein the two or more modes of operation comprise two or more of the following modes of operation:
a first mode of operation in which DU transmission, DU reception, or either DU transmission or DU reception may be performed by the IAB node; a second mode of operation in which DU transmission, DU reception, or either DU transmission or DU reception may be performed by the IAB node, subject to a condition; a third mode of operation in which neither DU transmission nor DU reception may be performed by the IAB node.

19 . The IAB node of claim 18 , wherein the two or more modes of operation comprise the second mode of operation, and the condition depends on:
(a) whether the subset of the subcarriers configured for the second mode of operation are configured as unavailable for the DU of a parent IAB node or not used on a mobile termination, MT, side of the IAB node; (b) whether the IAB node has received a control message that indicates that the subset of the subcarriers configured for the second mode of operation are available for transmission or reception; (c) whether operation on the MT side of the IAB is not impacted; or (d) a combination of two or more of (a)-(c).

20 . The IAB node of claim 14 , further comprising, prior to receiving the one or more configuration messages, transmitting a capability message to a parent IAB node.

21 . The IAB node of claim 20 , wherein the capability message comprises information that indicates that the IAB node has digital beamforming capability for Spatial Division Multiplexing (SDM).

22 . The IAB node of claim 21 , wherein the capability message comprises information that indicates that the IAB node has a capability to partition the frequency spectrum according to the two or more modes of operation.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Åström Magnus
• Dahlman Erik
• Dortschy Boris
• Bao Lei
• Makki Behrooz

Classifications

• H04L5/0035 Primary

  Resource allocation in a cooperative multipoint environment · CPC title