Dynamically controlling the power state of mobile integrated access and backhaul nodes

Abstract

Methods, systems and apparatus for wireless communications are described for enabling a mobile access node to enter a new power state based on detection of a second access node. The second access node may be detected by the mobile access node or a central unit (CU). The mobile access node or the CU may determine that the mobile access node enters a new power state and may notify the other of the determination. If the second access node is within a defined proximity or if one or more thresholds are exceeded, the mobile access node may enter a lower power state. If no other access nodes are within a defined proximity or if the one or more thresholds are not exceeded, the mobile access node may enter a higher power state. Configuration parameters for the power state change procedure may be configured by control signaling from the CU.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. patent application No. 17 / 099,731, entitled “DYNAMICALLY CONTROLLING A POWER STATE OF A MOBILE INTEGRATED ACCESS AND BACKHAUL NODE,” filed by LUO et al. on November 16, 2020, and U.S. provisional patent application No. 62 / 939,513, entitled “DYNAMICALLY CONTROLLING A POWER STATE OF A MOBILE INTEGRATED ACCESS AND BACKHAUL NODE,” filed by LUO et al. on November 22, 2019, each of which is assigned to the assignee of this application. Technical Field

[0003] The following relates generally to wireless communications and, more particularly, to dynamically controlling the power state of a mobile Integrated Access and Backhaul (IAB) node.

[0004] background

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may employ various technologies, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM).

[0006] A wireless multiple access communication system may include several access nodes or network access nodes, each of which simultaneously supports communication for multiple communication devices, which may be further referred to as user equipment (UE). The network access node may have a high-capacity wired backhaul connection to the network. However, in some deployments, a larger number of access nodes may need to be deployed (e.g., in a small area) to provide acceptable coverage to users. In such a deployment, it may be impractical to connect each access node to the network via a wired connection, and some networks or portions thereof may be configured as an integrated access and backhaul (IAB) network, in which one or more access nodes of the network may have a wireless backhaul connection to the network.

[0007] In some IAB networks, access node mobility (eg, moving IAB nodes) may affect network performance by causing interference between access nodes or between an access node and a UE.

[0008] Overview

[0009] The described technology relates to improved methods, systems, devices and apparatuses for supporting dynamic control of the power state of a mobile integrated access and backhaul (IAB) node. In general, the described technology provides a mobile access node (e.g., a mobile IAB node of an IAB network) to enter a first or second power state (e.g., turned on or off) based on detecting that a second access node is within a defined proximity. The second access node can be detected by measuring the signal strength of the second access node (e.g., if the measured signal strength is outside a threshold) or by estimating the distance to the second access node (e.g., if the distance is outside a threshold). The detection can be performed by a mobile access node or an access node central unit (CU) (e.g., based on a measurement report). The mobile access node or CU can determine that the mobile access node enters a first or second power state (e.g., turned on or off) and can indicate the determination to another device (e.g., to the CU or mobile access node, respectively).

[0010] If it is determined that the second access node is within the defined proximity and / or if one or more other thresholds are exceeded, the mobile access node can disconnect (e.g., enter a lower power state or a second power state). If it is determined that no other access node is within the defined proximity or if the one or more thresholds are not exceeded, the mobile access node can connect (e.g., enter a higher power state or a first power state after previously disconnecting). Configuration parameters (e.g., one or more trigger conditions), such as one or more threshold parameters, for the power state change procedure can be configured through control signaling from the CU.

[0011] A method of wireless communication by a mobile access node of a wireless backhaul communication network is described. The method may include: receiving control signaling indicating at least one configuration parameter associated with triggering the mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state; and communicating a power state change indication with a CU access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0012] An apparatus for wireless communications by a mobile access node of a wireless backhaul communications network is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to perform the following operations: receive control signaling indicating at least one configuration parameter associated with triggering the mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state; and communicate a power state change indication with a CU access node of the wireless backhaul communications network to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0013] Another apparatus for wireless communications by a mobile access node of a wireless backhaul communications network is described. The apparatus may include means for receiving control signaling indicating at least one configuration parameter associated with triggering the mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state; and communicating a power state change indication with a CU access node of the wireless backhaul communications network to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0014] A non-transitory computer-readable medium storing code for wireless communication by a mobile access node of a wireless backhaul communication network is described. The code may include instructions executable by a processor to: receive control signaling indicating at least one configuration parameter associated with triggering the mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state; and communicate a power state change indication with a CU access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0015] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: communicating the power state change indication to indicate that the mobile access node may be transitioning from the first power state to the second power state corresponding to a determination based on the at least one configuration parameter that the mobile access node may be within a defined proximity of a second access node of the wireless backhaul communication network; and performing a switching procedure to switch one or more subnodes of the mobile access node to the second access node or a different access node of the wireless backhaul communication network based on communicating the power state change indication.

[0016] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for: transitioning to the second power state based on completion of the switching procedure.

[0017] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for performing the following operations: transmitting a measurement report indicating measurements of the second access node, a different access node, or both, wherein the power state change indication can be communicated from the CU access node to the mobile access node based on the measurement report.

[0018] In some examples of the methods, devices, and non-transitory computer-readable media described herein, the measurement can be a signal strength measurement, a reference signal received power (RSRP) measurement, a reference signal received quality (RSRQ) measurement, a signal to interference plus noise ratio (SINR), or any combination thereof.

[0019] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for receiving, from a child access node of the mobile access node, an indication of the measurement of the second access node, the different access node, or both.

[0020] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: receiving a power state change indication indicating an identifier (ID) of the second access node.

[0021] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for transmitting a power state change indication indicating an ID of the second access node.

[0022] In some examples of the methods, devices, and non-transitory computer-readable media described herein, executing the switching procedure may include operations, features, means, or instructions for performing the following operations: transmitting a switching indication to a child access node to initiate the child access node to perform a search for a new parent access node.

[0023] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: communicating the power state change indication to indicate that the mobile access node may be transitioning from the second power state to the first power state in response to determining that the mobile access node may be outside a defined proximity of a second access node of the wireless backhaul communication network based on the at least one configuration parameter.

[0024] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: transmitting the power state change indication to the CU access node based on determining that the trigger condition can be met.

[0025] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: receiving the power state change indication from the CU access node based on determining that the trigger condition can be met.

[0026] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that the at least one configuration parameter includes a transmission power level threshold, wherein the power state change indication can be conveyed based on the transmission power level of the mobile access node satisfying the transmission power level threshold.

[0027] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating the at least one configuration parameter, the control signaling indicating to terminate wireless communication of the distributed unit (DU) of the mobile access node when in the second power state.

[0028] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless data communication of the DU of the mobile access node is terminated when in the second power state and that synchronization signal blocks (SSBs) are continued to be transmitted by the DU.

[0029] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for performing the following operations: transmitting the SSB, the SSB including a cellular cell prohibition flag indicating that the wireless data communication may not be available from the DU when in the second power state.

[0030] Some examples of methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for transmitting the SSB within a window for performing an inter-relay discovery procedure while in the second power state.

[0031] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless data communication of a mobile terminal (MT) of the mobile access node is terminated when in the second power state and that the MT continues to monitor the SSB.

[0032] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for performing the following operations: monitoring the SSB while in the second power state, the SSB may be a cell-defined SSB (CD-SSB).

[0033] Some examples of methods, apparatus, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for monitoring the SSB within a window for performing an inter-relay discovery procedure while in the second power state.

[0034] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating the at least one configuration parameter, the control signaling indicating to terminate the wireless data communication of the MT of the mobile access node when in the second power state and to continue to communicate one or more control signaling messages with the parent access node of the mobile access node.

[0035] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that the at least one configuration parameter includes a distance threshold, wherein the power state change indication can be communicated based on an estimated distance between the mobile access node and the second access node satisfying the distance threshold.

[0036] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that at least one configuration parameter includes an interference level threshold, wherein the power state change indication can be conveyed based on an interference level estimate satisfying the interference level threshold.

[0037] Some examples of methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for generating the interference level estimate based on a measured signal strength of an interfering signal or a quality metric of data communications with one or more child nodes of the mobile access node, or both.

[0038] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the quality metric may be a SINR, a channel quality indicator (CQI), a block error rate (BLER), or any combination thereof.

[0039] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that at least one configuration parameter includes a power consumption level threshold, wherein the power state change indication can be communicated based on power consumption measurement satisfying the power consumption level threshold.

[0040] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that the at least one configuration parameter includes a parent measurement threshold, wherein the power state change indication can be communicated based on a measurement of a transmission of a parent access node of the mobile access node by an MT of the mobile access node satisfying the parent measurement threshold.

[0041] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that the at least one configuration parameter includes a radio resource management (RRM) measurement threshold, wherein the power state change indication can be conveyed based on an RRM measurement of a transmission of a second access node by an MT of the mobile access node satisfying the RRM measurement threshold.

[0042] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that the at least one configuration parameter includes an inter-relay discovery measurement threshold, wherein the power state change indication can be conveyed based on the inter-relay discovery measurement of the MT of the mobile access node satisfying the inter-relay discovery measurement threshold.

[0043] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication can be conveyed based on a signal strength measurement of the second access node satisfying the signal strength measurement threshold.

[0044] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the signal strength measurement may be an RSRP measurement, an RSRQ measurement, a SINR, or any combination thereof.

[0045] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling indicating that at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication can be conveyed based on a signal strength measurement of the second access node observed by the child access node satisfying the signal strength measurement threshold.

[0046] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the signal strength measurement may be an RSRP measurement, an RSRQ measurement, a SINR, or any combination thereof.

[0047] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for receiving, from the child access node, an indication of a signal strength measurement of the second access node observed by the child access node.

[0048] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: receiving the power state change indication indicating a time offset between receipt of the power state change indication and a time when a transition between the first power state and the second power state is to occur; and transitioning between the first power state and the second power state based on the time offset.

[0049] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: transmitting the power state change indication with a time offset between the transmission of the power state change indication and the time when the transition between the first power state and the second power state is to occur; and transitioning between the first power state and the second power state based on the time offset.

[0050] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: transmitting an indication of the number of sub-access nodes that can be connected to the mobile access node; and receiving the power state change indication based on transmitting the indication of the number of sub-access nodes.

[0051] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: transmitting an indication of a mobility state of the mobile access node; and receiving the power state change indication based on transmitting the mobility state.

[0052] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: transmitting an indication of a power consumption level of the mobile access node; and receiving the power state change indication based on transmitting the indication of the power consumption level.

[0053] In some examples of the methods, devices, and non-transitory computer-readable media described herein, receiving the control signaling may include operations, features, means, or instructions for performing the following operations: receiving control signaling may be an F1 application protocol (AP) message, a media access control (MAC) control element (CE), a radio resource control (RRC) message, or any combination thereof.

[0054] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: communicating the power state change indication may be an F1-AP message, a MAC CE, an RRC message, or any combination thereof.

[0055] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the mobile access node may be an IAB node and the wireless backhaul communication network may be an IAB network.

[0056] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: receiving a first indication of a first mobility state of a second access node; and transmitting the power state change indication based on the second mobility state of the mobile access node being greater than the first mobility state.

[0057] A method of wireless communication by a CU node of a wireless backhaul communication network is described. The method may include: transmitting control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state; and communicating a power state change indication with the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0058] A device for wireless communication by a CU node of a wireless backhaul communication network is described. The device may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the device to perform the following operations: transmit control signaling, the control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state; and communicate a power state change indication with the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0059] Another apparatus for wireless communications by a CU node of a wireless backhaul communications network is described. The apparatus may include means for transmitting control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communications network to transition between a first power state and a second power state, the second power state consuming less power than the first power state; and communicating a power state change indication with the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0060] A non-transitory computer-readable medium storing code for wireless communication by a CU node of a wireless backhaul communication network is described. The code may include instructions executable by a processor to perform the following operations: transmitting control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state; and communicating a power state change indication with the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0061] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: communicating the power state change indication to indicate that the mobile access node may be transitioning from the first power state to the second power state corresponding to a determination based on the at least one configuration parameter that the mobile access node may be within a defined proximity of a second access node of the wireless backhaul communication network; and transmitting a switching instruction to the mobile access node based on communicating the power state change indication to instruct the mobile access node to switch one or more sub-access nodes of the mobile access node to the second access node or a different access node of the wireless backhaul communication network.

[0062] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, means, or instructions for performing the following operations: receiving a measurement report indicating measurements of the second access node, a different access node, or both, wherein the power state change indication can be communicated from the CU access node to the mobile access node based on the measurement report.

[0063] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the measurement may be a signal strength measurement, an RSRP measurement, an RSRQ measurement, a SINR, or any combination thereof.

[0064] In some examples of the methods, devices, and non-transitory computer-readable media described herein, the measurement report indicates measurements of the second access node, the different access node, or both that may have been made by a child access node.

[0065] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for receiving a power state change indication indicating an ID of the second access node.

[0066] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for transmitting a power state change indication indicating an ID of the second access node.

[0067] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the switching instruction may include operations, features, means, or instructions for performing the following operations: transmitting a switching instruction, wherein the switching instruction commands the mobile access node to transmit a switching indication to the child access node to initiate the child access node to perform a search for a new parent access node.

[0068] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: communicating the power state change indication to indicate that the mobile access node may be transitioning from the second power state to the first power state in response to determining that the mobile access node may be outside a defined proximity of a second access node of the wireless backhaul communication network based on the at least one configuration parameter.

[0069] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: transmitting the power state change indication to the mobile access node based on determining that the trigger condition can be satisfied.

[0070] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: receiving the power state change indication from the mobile access node based on determining that the trigger condition can be satisfied.

[0071] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating the at least one configuration parameter, the control signaling indicating termination of wireless communication of the DU of the mobile access node when in the second power state.

[0072] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless data communication of the DU of the mobile access node is terminated when in the second power state and that the SSB is continued to be transmitted by the DU.

[0073] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating the at least one configuration parameter, the control signaling indicating to continue transmitting the SSB including a cellular cell inhibit flag while in the second power state, the cellular cell inhibit flag indicating that wireless data communication may not be available from the DU.

[0074] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating at least one configuration parameter, the control signaling indicating to continue transmitting the SSB within a window for performing an inter-relay discovery procedure while in the second power state.

[0075] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless data communication of the MT of the mobile access node is terminated when in the second power state and that the MT continues to monitor the SSB.

[0076] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating the at least one configuration parameter, the control signaling indicating to continue monitoring the SSB, which may be a CD-SSB, while in the second power state.

[0077] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating at least one configuration parameter, the control signaling indicating to continue monitoring the SSB within a window for performing an inter-relay discovery procedure while in the second power state.

[0078] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating the at least one configuration parameter, the control signaling indicating to terminate the wireless data communication of the MT of the mobile access node when in the second power state and to continue to communicate one or more control signaling messages with the parent access node of the mobile access node.

[0079] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating that the at least one configuration parameter includes a distance threshold, wherein the power state change indication can be conveyed based on an estimated distance between the mobile access node and the second access node satisfying the distance threshold.

[0080] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting a control signaling indicating that at least one configuration parameter includes an interference level threshold, wherein the power state change indication may be conveyed based on an interference level estimate satisfying the interference level threshold.

[0081] In some examples of the methods, devices, and non-transitory computer-readable media described herein, the interference level estimate may be generated based on a measured signal strength of an interfering signal or a quality metric of data communications with one or more child nodes of the mobile access node, or both.

[0082] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the quality metric may be SINR, CQI, BLER, or any combination thereof.

[0083] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting a control signaling indicating that at least one configuration parameter includes a power consumption level threshold, wherein the power state change indication can be conveyed based on power consumption measurement satisfying the power consumption level threshold.

[0084] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating that the at least one configuration parameter includes a transmission power level threshold, wherein the power state change indication can be conveyed based on the transmission power level of the mobile access node satisfying the transmission power level threshold.

[0085] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating that the at least one configuration parameter includes a parent measurement threshold, wherein the power state change indication can be conveyed based on a measurement of a transmission of a parent access node of the mobile access node satisfying the parent measurement threshold.

[0086] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating that the at least one configuration parameter includes an RRM measurement threshold, wherein the power state change indication can be conveyed based on an RRM measurement of a transmission by an MT of the mobile access node to a second access node satisfying the RRM measurement threshold.

[0087] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating that the at least one configuration parameter includes an inter-relay discovery measurement threshold, wherein the power state change indication can be conveyed based on the inter-relay discovery measurement of the MT of the mobile access node satisfying the inter-relay discovery measurement threshold.

[0088] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication can be conveyed based on a signal strength measurement of the second access node satisfying the signal strength measurement threshold.

[0089] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the signal strength measurement may be an RSRP measurement, an RSRQ measurement, a SINR, or any combination thereof.

[0090] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting control signaling indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication can be conveyed based on a signal strength measurement of the second access node observed by the child access node satisfying the signal strength measurement threshold.

[0091] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the signal strength measurement may be an RSRP measurement, an RSRQ measurement, a SINR, or any combination thereof.

[0092] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a signal strength measurement of the second access node may be observed by the child access node.

[0093] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: transmitting the power state change indication indicating a time offset between receipt of the power state change indication and a time when a transition between the first power state and the second power state is to occur.

[0094] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: receiving the power state change indication indicating a time offset between receipt of the power state change indication and a time when a transition between the first power state and the second power state is to occur.

[0095] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: transmitting the power state change indication to the mobile access node based on a random selection between the mobile access node and a second access node to determine which of the mobile access node and the second access node may be transitioned to the second power state.

[0096] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: receiving a first indication of a first number of sub-access nodes that can be connected to the mobile access node and a second indication of a second number of sub-access nodes that can be connected to a second access node; and transmitting the power state change indication to the mobile access node based on the second number of sub-access nodes being less than the first number of sub-access nodes.

[0097] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: receiving a first indication of a first power consumption level of the mobile access node and a second indication of a second power consumption level of the second access node; and transmitting the power state change indication based on the second power consumption level being less than the first power consumption level.

[0098] In some examples of the methods, devices, and non-transitory computer-readable media described herein, transmitting the control signaling may include operations, features, means, or instructions for performing the following operations: transmitting the control signaling may be an F1-AP message, a MACCE, an RRC message, or any combination thereof.

[0099] In some examples of the methods, devices, and non-transitory computer-readable media described herein, communicating the power state change indication may include operations, features, means, or instructions for performing the following operations: communicating the power state change indication may be an F1-AP message, a MAC CE, an RRC message, or any combination thereof.

[0100] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the CU node may be a CU IAB node, the mobile access node may be a mobile IAB node, and the wireless backhaul communication network may be an IAB network. BRIEF DESCRIPTION OF THE DRAWINGS

[0102] Figure 1 An example of a wireless communication system according to aspects of the present disclosure is presented.

[0103] Figure 2 An example of a wireless communication system according to aspects of the present disclosure is presented.

[0104] Figure 3 An example of a wireless communication system according to aspects of the present disclosure is presented.

[0105] Figure 4 Examples of process flows according to aspects of the present disclosure are presented.

[0106] Figure 5 and Figure 6 A block diagram of an apparatus according to aspects of the present disclosure is shown.

[0107] Figure 7 A block diagram of a communications manager in accordance with aspects of the present disclosure is shown.

[0108] Figure 8 A diagram of a system including an apparatus according to aspects of the present disclosure is shown.

[0109] Figures 9 to 12 A flow chart illustrating a method according to aspects of the present disclosure is shown.

[0110] Detailed Description

[0111] A mobile access node of a wireless backhaul communication network (e.g., an integrated access and backhaul (IAB) network IAB node) may enter a first or second power state (e.g., switched on or off) based on detecting that a second access node (e.g., a second IAB node) is within a defined proximity of the mobile access node. The second access node may be detected by measuring the signal strength of the second access node (e.g., if the measured signal strength is outside a threshold) or by estimating the distance to the second access node (e.g., if the distance is outside or within a threshold). The detection may be performed by a mobile access node or an access node central unit (CU) of the wireless backhaul communication network (e.g., based on a measurement report). If it is determined that the second access node is within the defined proximity and / or if one or more other parameters are met, the mobile access node may be switched off (e.g., entered into a lower power state or a second power state). If it is determined that no other access node is within the defined proximity or if the one or more other parameters are not met, the mobile access node may be switched on (e.g., after having previously been switched off, entering a higher power state or a first power state). Configuration parameters (eg, one or more trigger conditions) for the power state change procedure, such as one or more threshold parameters, may be configured through control signaling from the CU.

[0112] In some wireless networks, an IAB node may communicate with other IAB nodes via one or more wireless backhaul links, and may communicate with user equipment (UE) via one or more wireless access links. An IAB node may receive data or control information via the one or more wireless backhaul links, and may forward the data or control information to a child access node (e.g., via one or more wireless backhaul links) or a UE (e.g., via one or more wireless access links). Some wireless networks may include a mobile IAB network, in which one or more access nodes (e.g., an IAB node) may move or change physical location within the network. A mobile IAB node may support communication with one or more child UEs and / or one or more child access nodes.

[0113] In one example, the mobile IAB node may move within the network such that the location of the mobile IAB node may change over time. The mobile IAB node may have a coverage area that may support communication with one or more UEs or other IAB nodes (e.g., other access nodes). In some cases, the mobile IAB node may come within a defined proximity of a second IAB node (e.g., a fixed IAB node or another mobile IAB node) such that if both the mobile IAB node and the second IAB node transmit at full power (e.g., or above a threshold power), their respective coverage areas may overlap completely or partially.

[0114] In some overlapping coverage areas, interference may occur between downlink or uplink communications associated with the two IAB nodes. Due to interference, connected subnodes (e.g., UEs and / or other IAB nodes) of one or both IAB nodes may experience at least some radio link failures. In some cases, interference may not affect communications with connected subnodes (e.g., when beamforming is used in a millimeter wave (mmW) wireless communication system, such as a new radio (NR) system that can communicate in frequency range 2 (FR2)), but if one or more subnodes of the mobile IAB node can be served by a second IAB node, the mobile IAB node may be redundant.

[0115] To reduce interference and / or save power, the mobile IAB node may enter a first or second power state (e.g., turned on or off) based on detecting that a second IAB node is within a defined proximity (e.g., detected within a close proximity area). The second IAB node may be detected by measuring the signal strength of the second IAB node (e.g., if the measured signal strength is outside a threshold) or by estimating the distance to the second IAB node (e.g., if the distance is outside or within a threshold). The detection may be performed by the mobile IAB node (e.g., based on mobile terminal (MT) signal measurements) or by the network CU (e.g., based on measurement reports).

[0116] If it is determined that the second IAB node is within the defined proximity (e.g., the mobile IAB node and the second IAB node are determined to be too close) and / or if one or more other parameters are met, the IAB node can be disconnected (e.g., enter a lower power state or a second power state). If it is determined that no other IAB node is within the defined proximity (e.g., the IAB node is far enough from the second IAB node) and / or if one or more other parameters are not met, the IAB node can be connected (e.g., after having been previously disconnected, entering a higher power state or a first power state). Configuration parameters (e.g., one or more trigger conditions), such as one or more threshold parameters, for triggering and / or completing a power state change procedure can be configured through control signaling from the CU.

[0117] A determination to change the power state (e.g., to turn on or off) may be made at the mobile IAB node and indicated to the CU, or may be made at the CU and indicated to the mobile IAB node. Such an indication may be referred to as a power state change indication. Once it is determined that the mobile IAB node is to be disconnected (e.g., before the mobile IAB node is disconnected), all connected child nodes of the mobile IAB node may be switched to another parent IAB node. The mobile IAB node may notify its child devices of the switching procedure, may execute the switching procedure, and may be disconnected. By disconnecting, the mobile IAB node may reduce the amount of interference experienced by one or more UEs or other IAB nodes, or may save power, among other benefits.

[0118] As described herein, the mobile IAB node may be disconnected by disconnecting some or all distributed unit (DU) signals and by disconnecting at least some MT communications. In some cases, the mobile IAB node may enter a low-power state in which it is completely disconnected, or operate with a reduced set of functions. If the mobile IAB node or the CU determines (e.g., based on the one or more parameters) that the mobile IAB node is to be turned on (e.g., to enter a higher power state), the mobile IAB node may turn on the DU signal and the MT communication. The CU may initiate a handover procedure to switch a sub-device (e.g., a new sub-device and / or a previous sub-device) from one or more other IAB nodes to the mobile IAB node, and the corresponding device may execute the handover procedure.

[0119] Aspects of the present disclosure are initially described in the context of wireless communication systems. Aspects of the present disclosure are further illustrated and described by and with reference to process flows, device diagrams, system diagrams, and flowcharts related to dynamically controlling power states of mobile integrated access and backhaul nodes.

[0120] Figure 1An example of a wireless communication system 100 according to aspects of the present disclosure is shown. The wireless communication system 100 may include one or more access nodes 105 (e.g., multiple access nodes or access nodes), one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, or an NR network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0121] The access nodes 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may be devices of different forms or with different capabilities. The access nodes 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each access node 105 may provide a geographic coverage area 110, in which a UE 115 and an access node 105 or an access node 105 and another access node 105 may establish one or more communication links 125 (e.g., via an IAB network). The geographic coverage area 110 may be an example of a geographic area in which an access node 105 and a UE 115 (e.g., or an access node 105 and another access node 105) may support signal communications according to one or more radio access technologies.

[0122] The UEs 115 may be dispersed throughout the geographic coverage area 110 of the wireless communication system 100, and each UE 115 may be fixed, mobile, or both at different times. The UEs 115 may be different forms of devices or devices with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, access nodes 105, or network equipment (e.g., core network nodes, relay devices, IAB nodes, or other network equipment), such as Figure 1 shown.

[0123] The access nodes 105 may communicate with the core network 130, or with each other, or both. For example, the access nodes 105 may interface with the core network 130 via one or more backhaul links 132 (e.g., via S1, N2, N3, or other interfaces). The access nodes 105 may communicate with each other directly (e.g., directly between the access nodes 105) or indirectly (e.g., through the core network 130), or both directly and indirectly via backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul links 120 may be or include one or more wireless links, such as in an IAB network.

[0124] One or more of the access nodes 105 described herein may include or may be referred to by those of ordinary skill in the art as a base transceiver station, a radio access node, an access point, a network node, an access node, an IAB node, a wireless node, a radio transceiver, a NodeB, an eNodeB (eNB), a next generation NodeB or a giga-NodeB (both may be referred to as gNBs), a HomeNodeB, a Home eNodeB, or other suitable terms. The wireless communication system 100 may include different types of access nodes 105 (such as a macro cell access node or a small cell access node, a donor access node including a central unit (CU) connected to the core network 130, a relay access node including a mobile terminal (MT) function and a distributed unit (DU) function).

[0125] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as electrical appliances or vehicles, meters, etc.

[0126] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays as well as access nodes 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay access nodes, among other examples, such as Figure 1 shown.

[0127] The UE 115 and the access node 105 may communicate with each other wirelessly via one or more communication links 125 through one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support the use of carrier aggregation or multi-carrier operation to communicate with the UE 115. The UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to the carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0128] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system using MCM technology, a resource element may include a code element period (e.g., the duration of a modulation code element) and a subcarrier, where the code element period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further improve the data rate or data integrity of communication with UE 115.

[0129] The time interval of the access node 105 or the UE 115 may be expressed as a multiple of a basic time unit, which may be, for example, T s =1 / (Δf max ·N f ) seconds sampling period, where Δf max It can indicate the maximum subcarrier spacing supported, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specific duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0130] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of code element periods (e.g., depending on the length of the cyclic prefix added before each code element period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-time slots containing one or more code elements. Excluding the cyclic prefix, each code element period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating band.

[0131] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0132] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across a system bandwidth or a subset of a system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to a plurality of UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0133] In some examples, the access nodes 105 may be mobile and therefore provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same access node 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different access nodes 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of access nodes 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0134] The wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private communication or group communication, and may be supported by one or more mission-critical services (such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low latency, critical mission, and ultra-reliable low latency may be used interchangeably herein.

[0135] In some examples, UE 115 may also be able to communicate directly with other UE 115 on a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within a geographic coverage area 110 of an access node 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the access node 105 or may not be able to receive transmissions from the access node 105. In some examples, a group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, wherein each UE 115 transmits to each other UE 115 in the group. In some examples, the access node 105 facilitates scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving the access node 105.

[0136] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these communications. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in a V2X system can communicate with roadside infrastructure such as roadside units, or communicate with a network through one or more network nodes (e.g., access node 105) using vehicle-to-network (V2N) communications, or both.

[0137] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by an access node 105 associated with the core network 130. User IP packets may be communicated via a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to a network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0138] Some access nodes, such as access node 105, may include subcomponents such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as a radio head, a smart radio head, or a transmit / receive point (TRP). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or access node 105 may be distributed across access nodes (e.g., radio heads and ANC) or merged into a single access node (e.g., access node 105).

[0139] The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). In general, the 300 MHz to 3 GHz region is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from about 1 decimeter to 1 meter long. UHF waves may be blocked or redirected by buildings and environmental features, but these waves may penetrate various structures sufficiently for macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0140] The wireless communication system 100 may also operate in a super high frequency (SHF) zone using a frequency band from 3 GHz to 30 GHz (also known as a centimeter band) or in an extremely high frequency (EHF) zone of a spectrum (e.g., from 30 GHz to 300 GHz) (also known as a millimeter band). In some examples, the wireless communication system 100 may support mmW communications between a UE 115 and an access node 105, and the EHF antennas of the corresponding devices may be smaller and closer than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and a shorter range than SHF or UHF transmissions. The technology disclosed herein may be employed across transmissions using one or more different frequency zones, and the use of frequency bands specified across these frequency zones may differ by country or regulatory agency.

[0141] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band). When operating in an unlicensed radio frequency spectrum band, devices such as access nodes 105 and UEs 115 may employ carrier sensing for conflict detection and avoidance. In some examples, operations in an unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in a licensed band. Operations in an unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0142] The access node 105 or UE 115 may be equipped with multiple antennas, which may be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the access node 105 or UE 115 may be located in one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more access node antennas or antenna arrays may be co-located at antenna components such as antenna towers. In some examples, antennas or antenna arrays associated with the access node 105 may be located in different geographical locations. The access node 105 may have an antenna array with several rows and columns of antenna ports, which the access node 105 may use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0143] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., access node 105, UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements may include a transmitting device or a receiving device applying an amplitude offset, a phase offset, or both to a signal carried via an antenna element associated with the device. Adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to an antenna array of a transmitting device or a receiving device, or relative to some other orientation).

[0144] The access node 105 or UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the access node 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the access node 105 in different directions. For example, the access node 105 may transmit signals according to different beamforming weight sets associated with different transmit directions. Transmissions along different beam directions may be used to identify (e.g., by a transmitting device such as the access node 105 or by a receiving device such as the UE 115) a beam direction for later transmission or reception by the access node 105.

[0145] Some signals, such as data signals associated with a particular receiving device, may be transmitted by access node 105 along a single beam direction (e.g., a direction associated with a receiving device, such as UE 115). In some examples, a beam direction associated with transmission along a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more of the signals transmitted by access node 105 along different directions, and may report to access node 105 an indication of the signal received by UE 115 with the highest signal quality or acceptable signal quality. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned on a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0146] The wireless communication system 100 may be a packet-based network that operates according to a layered protocol stack. In the user plane, the communication of the bearer or packet data convergence protocol (PDCP) layer may be IP-based. The radio link control (RLC) layer may perform packet segmentation and reassembly to communicate on a logical channel. The media access control (MAC) layer may perform priority handling and multiplex logical channels into transport channels. The MAC layer may also use error detection techniques, error correction techniques, or both to support retransmission of the MAC layer to improve link efficiency. In the control plane, the radio resource control (RRC) protocol layer may provide the establishment, configuration, and maintenance of an RRC connection between a UE 115 and an access node 105 or a core network 130 that supports a radio bearer of user plane data. At the physical layer, transport channels may be mapped to physical channels.

[0147] The access node 105 may support functionality for IAB network operations. For example, the access node 105 may be divided into one or more support entities (e.g., functions) for facilitating wireless backhaul density in collaboration with NR communication access (e.g., via mmW technology). In some examples, the access node 105 (e.g., a donor access node or a donor IAB node) may be divided into associated CU and DU entities, wherein one or more DUs may be partially controlled by an associated CU. The CU entity of the access node 105 may facilitate a connection between the core network 130 and the access node 105 (e.g., an access node), for example, via a wired connection or a wireless connection to the core network 130. The CU entity of the access node 105 may maintain RRC and PDCP layer functionality (e.g., for facilitating connection to the core network 130).

[0148] The one or more DUs of the access node 105 may control or schedule functions for one or more additional devices (e.g., one or more additional access nodes 105 or UE 115) based on the configured access link (e.g., communication link 125) and backhaul link 120. The one or more DUs of the access node 105 may maintain RLC, MAC, and physical (PHY) layer functions (e.g., scheduling one or more additional devices). Based on the CU and DU entities supported at the access node 105, such an access node 105 may be referred to as a donor access node (e.g., an IAB donor or donor node).

[0149] In addition, in some examples, the access node 105 can be divided into associated MT and DU entities, wherein the MT function of the access node 105 can be controlled or scheduled by the DU entity of one or more other access nodes 105 (e.g., via a Uu interface). The DU associated with such an access node 105 can be controlled by the MT function (e.g., by a command received via the MT function). In addition, the DU of the access node 105 can be controlled at least in part by a signaling message (e.g., via an F1 application protocol (AP)) from a CU entity of an associated donor access node (e.g., a donor node) on a configured access link and backhaul link 120 of a network connection. The DU of one or more access nodes 105 can support one of a plurality of service cells of a network coverage area. The DU of the one or more access nodes 105 can control or schedule the functions of an additional device (e.g., one or more of the additional access nodes 105 or a UE 115) according to the configured access link and backhaul link 120. Based on the MT and DU entities supported at the access node 105, the access node 105 may be referred to as an intermediate access node (eg, an IAB node or an IAB relay node).

[0150] As described herein, in a wireless communication system 100, one or more access nodes 105 (e.g., a donor access node or a donor IAB node) may include one or more CUs and one or more DUs, wherein the one or more DUs associated with the donor access node may be partially controlled by the CU associated with the donor access node. The CU may be a component of a network management function, a database, a data center, or a core network 130 (e.g., a 5G NR core network (5GC)). In an IAB network, a CU (e.g., a donor access node 105) may communicate with a core network 130 (e.g., a 5GC) via a backhaul link 132 (e.g., a wired backhaul or a wireless backhaul). The donor access node 105 may be referred to as an IAB donor in, for example, an IAB network, and may communicate with one or more IAB nodes (e.g., other access nodes 105), which operate as one or more DUs relative to the IAB donor and one or more UEs 115.

[0151] For example, an IAB network may include a chain of wireless devices starting with a donor access node 105 (e.g., a radio access network (RAN) node that terminates an interface connection with a core network 130) and ending with a UE 115, with any number of relay nodes in between. An intermediate or relay access node 105 (e.g., an intermediate access node 105, a parent access node 105, a child access node 105, an IAB node, a relay access node 105, a relay node) may support MT functions controlled and scheduled by an IAB donor or another access node 105 such as a parent access node 105. Such an access node 105 may also support DU functions associated with one or more additional entities (e.g., an IAB node and a UE 115) within a relay chain or configuration of an access network (e.g., downstream). In some examples, the MT function may refer to the implementation of at least some aspects of supporting an MT or UE 115. These relay mechanisms may forward traffic to additional entities, extend the wireless access range of one or more access nodes 105, or enhance the backhaul capacity density within a serving cell.

[0152] In some examples, the wireless communication system 100 may employ one or more wired and wireless backhaul links to establish a connection between a core network (e.g., core network 130) and the one or more wireless nodes within the wireless communication system 100. For example, the wireless communication system 100 may include multiple access nodes 105 (e.g., access nodes or remote radio heads), wherein at least one access node 105 is coupled to a wired backhaul link (e.g., backhaul link 132) such as a fiber optic cable. Additional access nodes 105 may not be directly coupled to the core network 130 or coupled to another access node 105 via a wired backhaul link 120, and may communicate backhaul traffic using the wireless backhaul link 120. In this case, the access node 105 may communicate the backhaul access traffic wirelessly to a high-capacity fiber point (e.g., a location where the access node is coupled to a wired link to the core network 130). The backhaul link 132 (e.g., a wired link) may carry packets from one or more established PDN gateways over an interface, and then direct the packets through the core network and to the coupled wireless nodes over an interface.

[0153] A mobile access node 105 (e.g., a mobile IAB node) may move within a network (e.g., an IAB network) such that the physical geographic location of the mobile access node 105 may change over time. In some cases, the mobile access node 105 may come within a defined proximity of a second access node 105 such that their respective coverage areas may overlap completely or partially, thereby causing interference between downlink or uplink communications associated with the two access nodes 105. In some cases, the interference may not affect communications with connected child nodes, but if one or more child nodes of the mobile access node 105 can be served by the second access node 105, the mobile access node 105 may be redundant.

[0154] To reduce interference and / or save power, the mobile access node 105 may enter a first or second power state (e.g., switched on or off) based on detecting the second access node 105 within a defined proximity. The second access node 105 may be detected by measuring the signal strength of the second access node 105 (e.g., if the measured signal strength is outside a threshold) or by estimating the distance to the second access node 105 (e.g., if the distance is outside or within a threshold). Upon detection, the mobile access node 105 or the CU access node 105 may determine (e.g., based on one or more configuration parameters) whether the mobile access node is to enter a first power state or a second power state (e.g., switched on or off), and may indicate the determination to another device (e.g., to the CU access node 105 or the mobile access node 105, respectively).

[0155] If it is determined that the second access node 105 is within the defined proximity and / or if one or more other thresholds are exceeded, the mobile access node 105 node can be disconnected (e.g., enter a lower power state or a second power state). If it is determined that no other access node 105 is within the defined proximity and / or if one or more other parameters are not exceeded, the mobile access node 105 can be connected (e.g., enter a higher power state or a first power state after previously disconnecting). Configuration parameters (e.g., one or more trigger conditions or thresholds) for triggering and / or completing the power state change procedure can be configured through control signaling from the CU access node 105.

[0156] Figure 2 An example of a wireless communication system 200 according to aspects of the present disclosure is shown. In some examples, the wireless communication system 200 can implement aspects of the wireless communication system 100. For example, the wireless communication system 200 can include one or more UEs 115 and one or more access nodes 105, which can be reference Figure 1An example of a UE 115 and access nodes 105 is described. One or more of the access nodes 105 (e.g., access node 105-b, which may include a CU entity) may be connected to the core network 130 via a wired backhaul connection 220. The infrastructure and spectrum resources used for network access within the wireless communication system 200 may additionally support one or more wireless backhaul links 210 between the access nodes 105. For example, the wireless backhaul links 210 may support an IAB network architecture in which the access nodes 105 function as IAB nodes.

[0157] The access node 105 may communicate with other access nodes 105 via one or more wireless backhaul links 210, and may communicate with UEs 115 (e.g., within a corresponding coverage area 205 of the access node 105) via one or more wireless access links 215. Figure 1 As described, the access node 105 can receive data or control information via the one or more wireless backhaul links 210, and can forward the data or control information to the child access node 105 (e.g., via one or more wireless backhaul links 210) or the UE 115 (e.g., via one or more wireless access links 215).

[0158] In some cases, the wireless communication system 200 may represent a mobile IAB network, where one or more access nodes 105 (e.g., IAB nodes) may move or change physical locations within the network. An IAB node that moves within the network may be referred to as a mobile IAB node, and a mobile IAB network may include any combination of fixed IAB nodes and mobile IAB nodes. Examples of mobile IAB nodes may include IAB nodes installed on buses, trains, or taxis, among other examples.

[0159] The mobile IAB node may support communication with one or more child UEs 115 over one or more wireless access links 215. In some cases, the mobile IAB node may additionally support communication with one or more child IAB nodes over one or more wireless backhaul links 210. In some other cases, the mobile IAB node may not be able to support communication with child IAB nodes (e.g., due to the mobility characteristics of the mobile IAB node), and may therefore be a "leaf" network node, or a last-hop IAB node (e.g., may support access communications with one or more child UEs 115, but not with other child nodes such as child access nodes 105).

[0160] In one example, the access node 105-f may represent a mobile IAB node (e.g., mounted on a bus or other transportation system). The access node 105-f may traverse a path 225 (e.g., a route) within a network (e.g., may move within the network) such that the location of the access node 105-f may change over time. The access node 105-f may have a coverage area 205-c that may support communication with one or more UEs 115 such as UE 115-g (e.g., UEs 115 on the access node 105-f or within the coverage area 205-c). In some cases, the access node 105-f may additionally support communication with other access nodes 105 within or near the coverage area 205-c.

[0161] As the mobile IAB node moves within the network, a new parent node may be assigned to the mobile IAB node based on the current location, where the parent node may be changed by a topology adaptation procedure (e.g., performed in accordance with a wireless communication standard). In some cases, the topology adaptation procedure may be directed by a CU unit of the IAB network (e.g., associated with access node 105-b). In one example, access node 105-d may be the parent node of access node 105-f, but when access node 105-f traverses path 225, access node 105-f may change to another parent node (e.g., access node 105-c or 105-e) directed by the CU (e.g., access node 105-b).

[0162] In some cases, the mobile IAB node may come within a defined proximity of a second IAB node (e.g., a fixed IAB node or a mobile IAB node) such that if both the mobile IAB node and the second IAB node transmit at full power (e.g., or above a threshold power), their respective coverage areas 205 may overlap (e.g., completely or partially overlap). For example, the access node 105-f may traverse one or more locations on the path 225, where the coverage area 205-c may be additionally represented by the coverage area 205-d, which may overlap with the coverage area 205-a and / or the coverage area 205-b (e.g., overlap with all or a portion of the coverage areas 205-a and / or 205-b). In some overlapping coverage areas 205, interference may occur between communications associated with the mobile IAB node (e.g., the access node 105-f) and communications associated with the second node (e.g., the access node 105-d and / or the access node 105-e).

[0163] In some cases, the connected child nodes (e.g., UE 115 and / or other access nodes 105) of one or both IAB nodes may experience at least some radio link failures due to interference. In some cases, the interference may not affect communications with the connected child nodes. However, if one or more child nodes (e.g., UE 115-g) of a mobile IAB node (e.g., access node 105-f) can be served by a second IAB node (e.g., access node 105-d or 105-e), the mobile IAB node may be redundant.

[0164] Therefore, in order to reduce interference and / or save power, the mobile IAB node may enter a first or second power state (e.g., switched on or off) based on detecting a second IAB node (e.g., a fixed IAB node, another mobile IAB node, a parent IAB node of the mobile IAB node) within a defined proximity of the mobile IAB node. In some cases, the second power state may consume less power than the first power state. If it is determined that the second IAB node is within the defined proximity or if one or more threshold parameters are exceeded, the IAB node may be disconnected (e.g., enter a lower power state or a second power state). If it is determined that no other IAB node is within the defined proximity or if one or more threshold parameters are not exceeded, the IAB node may be switched on (e.g., after having previously been disconnected, entering a higher power state or a first power state).

[0165] The second IAB node may be detected by its measured signal strength (e.g., if the measured signal strength is outside a threshold) or by a distance to the second IAB node. The detection may be performed by a mobile IAB node (e.g., based on MT signal measurements) or by a network CU (e.g., based on measurement reports).

[0166] The determination to change the power state (e.g., turn on or off) can be made at the mobile IAB node and indicated to the CU, or can be made at the CU and indicated to the mobile IAB node. Such an indication may be referred to as a power state change indication. Configuration parameters (e.g., one or more trigger conditions), such as one or more threshold parameters, for triggering and / or completing a power state change procedure may be configured by control signaling from the CU (e.g., via one or more of an F1-AP message, an RRC message, or a MAC control element (CE)). In some cases, in addition to detecting a second IAB node, the mobile IAB node may change the power state based on one or more other configured parameters. If it is determined that the mobile IAB node is to be disconnected (e.g., before the mobile IAB node is disconnected), all connected child nodes of the mobile IAB node may be switched to another parent IAB node (e.g., by the CU). As described herein, the mobile IAB node may be disconnected by disconnecting some or all DU signals and by disconnecting some MT communications.

[0167] A CU (e.g., associated with access node 105-b) may transmit control signaling to configure access node 105-f (e.g., and other access nodes 105) using one or more parameters for triggering or completing a power state change procedure (e.g., one or more trigger conditions). At one or more locations along path 225, coverage area 205-c of access node 105-f may overlap with one or more other coverage areas 205 (e.g., coverage area 205-d may overlap with coverage areas 205-a and / or 205-b). At one or more locations, access node 105-f or a CU may use the one or more parameters to detect that another access node 105 (e.g., access node 105-d or 105-e) is within a defined proximity of access node 105-f (e.g., if one or more trigger conditions are met). Similarly, access node 105-f or a CU may use one or more parameters to determine that access node 105-f is to disconnect (e.g., enter a lower power state).

[0168] The device performing the determination may notify another device (e.g., a CU or access node 105-f, respectively) of the determination via a power state change indication. The CU may initiate a switching procedure to switch a sub-device (e.g., UE 115-g) from access node 105-f to one or more other access nodes 105 (e.g., access node 105-d or 105-e). Access node 105-f may notify its sub-devices of the switching procedure, may execute the switching procedure, and may disconnect. By disconnecting, access node 105-f may reduce the amount of interference experienced by one or more UEs 115 or other access nodes 105, or may save power, among other benefits.

[0169] In some cases, the access node 105-f may continue to follow the path 225 so that the coverage area 205-c may not overlap with other coverage areas 205. The access node 105-f or the CU may determine (e.g., based on one or more parameters) that no other access nodes 105 are within (e.g., or detected within) the defined proximity of the access node 105-f, and may determine (e.g., based on one or more parameters) that the access node 105-f is to be turned on (e.g., enter a higher power state). The device performing the determination may notify another device (e.g., the CU or access node 105-f, respectively) of the determination via a power state change indication, and the access node 105-f may be turned on. The CU may initiate a handover procedure to handover a sub-device (e.g., a new sub-device and / or a previous sub-device, such as a UE 115-g) from one or more other access nodes 105 (e.g., access node 105-d or 105-e) to the access node 105-f, and the corresponding device may perform the handover procedure.

[0170] Figure 3 An example of a wireless communication system 300 according to aspects of the present disclosure is shown. In some examples, the wireless communication system 300 can implement aspects of the wireless communication system 100 or 200. For example, the wireless communication system 300 can be an NR system that supports sharing of infrastructure and spectrum resources for NR access with wireless backhaul link capacity, supplements wired backhaul connections, and provides an IAB network architecture. For example, the wireless communication system 300 can represent a mobile IAB network, in which one or more access nodes 105 can be mobile (e.g., can move or change position) within the network, and in which one or more access nodes 105 can be fixed.

[0171] The wireless communication system 300 may include a donor access node 105-g (such as a donor IAB node or a donor base station), which is divided into an associated CU 325 function and an associated DU 330 function. The DU 330 associated with the donor access node 105-g may be controlled in part by the CU 325 of the access node 105-g. In some examples, the CU 325 and the DU 330 may be located in a single device. In other examples, the DU 330 of the donor access node 105-g may be located externally and may communicate with the CU 325 in wired or wireless communication. The CU 325 of the donor access node 105-g may communicate with the core network 130 via a backhaul connection 320, such as an NG interface (which may be an example of a portion of a backhaul link). The DU 330 of the donor access node 105-g (e.g., of an IAB network) may support network coverage based on a connection associated with the backhaul link 310 and the access link 315 of the IAB network. The DU 330 of the donor access node 105 - g may control one or more of the access link 315 and the backhaul link 310 within the corresponding network coverage, and provide control and scheduling for sub-devices such as the relay access node 105 (eg, an IAB node) or the UE 115 .

[0172] Each of the remaining access nodes 105 can be divided into associated MT 335 and DU 330 functions (e.g., entities). The MT 335 of each access node 105 can be controlled or scheduled by one or more ancestor (e.g., parent) access nodes 105 (e.g., parent IAB nodes). For example, the access node 105 can be controlled or scheduled by a donor access node 105-g or another upstream access node 105. The DU 330 of the access node 105 can be partially controlled by a signaling message from a CU 325 (e.g., or an additional CU 325) of an associated donor access node 105-g connected to the network (e.g., via an F1-AP interface). The DU 330 can schedule one or more of the child access nodes 105 or UEs 115, and can control one or more of the access links 315 or backhaul links 310 under its coverage.

[0173] The MT 335 of the access node 105 may act or function as a scheduled node (e.g., similar to the UE 115) scheduled by the parent access node of the MT 335 (e.g., the access node 105-h may be scheduled by the access node 105-g). The DU 330 of the access node 105 may act or function as a scheduling node that schedules a child device of the access node 105 (e.g., the UE 115 or a child access node 105). The DU 330 of the donor access node 105-g may also schedule a child IAB node downstream in the relay chain (e.g., the access node 105-1). The access node 105 operating as an IAB access node may relay communications between an access node 105 operating as a parent access node (e.g., an IAB donor, or an upstream or higher IAB node on the relay chain) and an access node 105 operating as a child access node (e.g., a downstream or lower IAB node on the relay chain) or a UE 115. The mobile IAB network may share resources between the access link 315 and the backhaul link 310 and may reuse some aspects of the access network framework.

[0174] In some examples described herein, access node 105-j may represent a mobile IAB node that may move within a network. Access node 105-j may serve access node 105-1 and UE 115-k (e.g., as a child node) within coverage area 305-a. A second access node 105-k (e.g., a fixed node) may have a second coverage area 305-b. In some cases, as described in reference Figure 2 As described, the access node 105-j may move such that the coverage area 305-a overlaps with one or more other coverage areas 305 of one or more other access nodes 105. For example, the coverage area 305-a may partially or completely overlap with the coverage area 305-b at one or more locations of the access node 105-j.

[0175] CU 325 can be configured with one or more parameters or can determine one or more parameters, which are associated with changing the power state of the access node 105 attached to CU 325 or associated with CU. CU 325 can transmit control signaling indicating the one or more parameters to the access node 105 (e.g., through one or more of the F1-AP interface, MAC CE or RRC message). CU 325 can determine the following or use the following to configure: distance threshold, interference level threshold, parent measurement threshold, radio resource management (RRM) threshold, inter-relay discovery measurement threshold, and / or signal strength measurement threshold, each of which can represent an example of a trigger condition. The trigger condition can be used to detect one or more other access nodes 105 within a defined proximity of a mobile access node 105 (e.g., a mobile IAB node, such as access node 105-j). CU 325 can additionally determine the following or use the following to configure: power consumption level threshold and / or transmission power level threshold, where a determination to change the power state can be made based on such thresholds.

[0176] As the access node 105-j moves within the network, one or more other access nodes 105 (e.g., fixed or mobile access nodes 105) may be detected within a defined proximity of the access node 105-j. For example, the access node 105 may be detected based on one or more trigger conditions configured or established by the CU 325 through control signaling. In some cases, the detected access node 105 may be a parent node of the access node 105-j (e.g., a mobile IAB node). The access node 105 may be detected by the access node 105-j or the CU 325 (e.g., of the access node 105-g). For example, the access node 105-j may detect a second access node 105 (e.g., access node 105-k) through the MT 335 of the access node 105-j. In some cases, the second access node 105 may be detected by estimating the distance between the access node 105-j and the second access node 105, wherein the estimated distance may exceed a configured distance threshold. If the estimated distance is less than or equal to the threshold, then the second access node may be undetected or outside the defined proximity of access node 105-j.

[0177] Additionally or alternatively, the MT 335 may detect the second access node 105 (e.g., access node 105-k) through measurements of a parent node (e.g., access node 105-h), through RRM measurements of potential handover candidates, or through measurements of inter-relay discovery (e.g., for discovering other access nodes 105). For example, if any of these measurements exceeds a corresponding configured threshold, the second access node 105 may be detected to be in close proximity to another IAB node (e.g., access node 105-j). If any of the measurements is less than or equal to a corresponding threshold, the second access node 105 may not be detected or may be outside a defined proximity of another IAB node (e.g., access node 105-j).

[0178] The CU 325 may detect that the second access node 105 (e.g., access node 105-k) is in close proximity to another IAB node by receiving a measurement report (e.g., including parent node measurements, RRM measurements, or inter-relay measurements) from an access node 105-j (e.g., a mobile IAB node) or UE 115-k, or other access nodes 105 such as access node 105-l (e.g., a child node of a mobile IAB node). For example, if the measurement of the measurement report meets the corresponding configured threshold, the second access node 105 may be detected by the CU 325 as being in close proximity to another IAB node (e.g., access node 105-j). If any of the above measurements meets the corresponding configured threshold, the access node 105-j may additionally or alternatively detect that the second access node 105 is in close proximity.

[0179] In some cases, if the measured signal strength or interference level of the second access node 105 (e.g., measured by the access node 105-j or a child node) exceeds a corresponding configured threshold, the second access node 105 (e.g., access node 105-k) can be considered to be detected within the defined proximity of the access node 105-j. If the measured signal strength or interference level is less than or equal to the corresponding configured threshold, the second access node may not be detected or outside the defined proximity. Examples of measured signal strengths may include one or more of reference signal received power (RSRP), reference signal received quality (RSRQ), or signal to interference and noise ratio (SINR), among other examples. The interference level can be estimated based on the measured strength of the interfering signal (e.g., from the second access node 105).

[0180] Additionally or alternatively, the interference level may be estimated by a quality metric used to communicate with a child node of the access node 105-j, such as a block error rate (BLER), a channel quality indicator (CQI), or one or more of SINR and other examples. For example, a low SINR or CQI, or a high BLER may indicate that the access node 105-j is experiencing interference from the second access node 105. The child node may transmit an indication of a measurement of signal strength or interference to the access node 105-j, which the access node 105-j may use to detect the second access node 105, or the indication may be included in a measurement report to the CU 325.

[0181] If a second access node 105 (e.g., access node 105-k) is detected, the access node 105-j or the CU 325 may determine whether to change the power state of the access node 105-j (e.g., turn the access node 105-j on or off). This determination may be made based on the detection of the second access node 105. In some cases, the determination may be additionally based on interference conditions at the subnodes in the overlapping coverage area, power consumption at the access node 105-j, or the transmission power of the access node 105-j. For example, in FR2 with a narrow service beam, communications at the subnodes in the overlapping coverage area may be largely unaffected by interference (e.g., from communications associated with another access node 105). Therefore, it may be decided to delay disconnecting the access node 105-j until higher interference is observed, for example, through a BLER or CQI report from a subnode (e.g., UE 115-k, access node 105-l, or any subnode of the access node 105-k). For example, if the observed interference level satisfies the configured interference level threshold and a second access node 105 has been detected, the CU 325 or access node 105 - j may determine to disconnect access node 105 - j.

[0182] In some cases, if the interference does not affect child nodes in the overlapping coverage area, it may be determined to disconnect access node 105-j for the purpose of saving power (e.g., because any child nodes of access node 105-j may be served by one or more other access nodes 105). For example, if the power consumption level measurement at access node 105-j satisfies a configured power consumption measurement threshold and a second access node 105 has been detected, the CU 325 or access node 105-j may determine to disconnect access node 105-j. In some cases, it may be determined to disconnect access node 105-j because the transmission power (e.g., minimum transmission power) of the MT 335 of access node 105-j may cause receiver overflow or relatively high interference at one or more other access nodes 105 (e.g., access node 105-k). For example, if the transmission power level of access node 105-j satisfies the configured transmission power level and a second access node 105 has been detected, the CU 325 or access node 105-j may determine to disconnect access node 105-j.

[0183] If the second access node 105 (e.g., and any other access node 105) is not detected using one or more triggering conditions, the CU 325 or access node 105-j can determine that the access node 105-j is turned on (e.g., changed to a higher power state). For example, if the access node 105 is not detected within a defined proximity of the access node 105-j using the methods described herein, the CU 325 or access node 105-j can determine that the access node 105-j is turned on.

[0184] If the access node 105-j determines to change the power state (e.g., to turn on or off), the access node 105-j may transmit a power state change indication to the CU 325 (e.g., via one or more of an F1-AP interface, a MAC CE, or an RRC message) indicating that the access node 105-j is to be turned on or off. Additionally or alternatively, the access node 105-j may transmit a request message indicating a request to turn on or off to the CU 325. If the CU 325 (e.g., based on a measurement report or a request message) determines to change the power state of the access node 105-j, the CU 325 may transmit a power state change indication to the access node 105-j (e.g., via one or more of an F1-AP interface, a MAC CE, or an RRC message) indicating that the access node 105-j is to be turned on or off.

[0185] After transmitting or receiving a power state change indication, the CU 325 may initiate a handover procedure for a child node of the access node 105-j (e.g., UE 115-k and access node 105-1). In the case of disconnection, the handover procedure may transfer the child node to another access node 105 (e.g., access node 105-k), and in the case of connection, the handover procedure may transfer the child node to access node 105-j. In some cases, the power state change indication may further include one or more parameters, such as an action time for connection or disconnection or an identifier (ID) of a detected access node 105 (e.g., access node 105-k). The action time may indicate a time offset between the reception of the power state change indication and the time at which the transition to connection or disconnection is to occur.

[0186] In some cases, it may be determined (e.g., by access node 105-j or CU 325) that the child node is to be handed over to a detected second access node 105 (e.g., access node 105-k). In such a case, the determination may be made without reference to the handover measurement report, and in some cases may be based on a determination that the second access node 105 is within a defined proximity of access node 105-j. In some other cases, the child node may be notified of an upcoming power state change procedure, and the child node may search for a new parent node by performing one or more signal measurements. The child node may transmit a measurement report to CU 325 (e.g., based on the one or more signal measurements) to handover to the parent access node 105, and CU 325 may determine a new parent access node (e.g., a second access node 105 or a different access node 105) based on the measurement report. The child node may transmit the measurement report through the current parent access node 105 (e.g., access node 105-j).

[0187] If the access node 105-j disconnects (e.g., enters a second or lower power state), it may employ one or more conditions for its DU 330 and / or MT 335. The conditions employed by the DU 330 and / or MT 335 may be indicated by the CU 325 through one or more configuration parameters (e.g., communicated through control signaling), or may be determined by the access node 105-j. For example, disconnection may include turning off all DU signals (e.g., suspending wireless data communications), or may include turning off all DU signals and continuing to transmit synchronization signal blocks (SSBs). In some cases, when disconnected, the DU 330 may transmit a cell-defined SSB (CD-SSB) with a cell-disable flag turned on, such that the SSB may indicate that wireless data communications are not available for the DU 330. When disconnected, the DU 330 may transmit an SSB within an SSB timing configuration (STC) window for inter-relay discovery procedures (e.g., discovery by one or more other access nodes 105).

[0188] Disconnection may further include suspending communication between the MT and the parent node (e.g., access node 105-h), except for monitoring signal quality (e.g., monitoring CD-SSB, inter-relay discovery SSB). In some cases, the MT 335 may maintain some communications with the parent node (e.g., access node 105-h), such as signaling related to power state changes. For example, the MT 335 may continue to transmit or receive control signaling. Connecting may include updating any communication or signaling that was terminated at disconnection. The access node 105-j may be connected or disconnected based on the action time included in the power state change indication. The features provided by the DU 330 and / or MT 335 in the second power state (e.g., low power state) may be indicated to the access node 105-j (e.g., mobile access node 105) by a configuration received from the CU 325, or the access node 105-j may autonomously determine which features are provided by the DU 330 and / or MT 335 in the second power state.

[0189] In some cases, two mobile access nodes 105 may be detected within a defined proximity of each other (e.g., may detect each other or may be detected by the CU 325). For example, the access node 105-k may also represent a mobile IAB node, and the access nodes 105-j and 105-k may be detected within a defined proximity of each other. In such a case, one of the access nodes 105 may be randomly selected to be disconnected, or may be selected to be disconnected based on one or more factors. The CU 325, or one or both of the two mobile access nodes 105, may determine which access node 105 to disconnect. In an example where the CU 325 makes a determination, the CU 325 may indicate to the selected access node 105 (e.g., access node 105-j) (e.g., via a power state change indication) that the access node 105 is to be disconnected. In an example where one or both of the two mobile access nodes 105 make a determination, the two access nodes 105 may exchange signaling to determine and inform each other (eg, via a MAC CE, or via an F1-AP message communicated via the CU 325) which access node 105 is to disconnect.

[0190] The mobile access node 105 may be selected to disconnect based on the number of child nodes, the mobility state, or the amount of power consumption. One or more of these parameters may be communicated between the two access nodes 105 or may be communicated to the CU 325 by one or both of the access nodes 105 (e.g., to make a determination). In one example, a mobile access node 105 with a smaller number of connected child nodes (e.g., UE 115 and other access nodes 105) may be selected to disconnect (e.g., to make the handover burden smaller). In some cases, a mobile access node 105 with higher mobility or with higher power consumption may be selected to disconnect so that a more stable access node 105 or an access node 105 with more power access may remain connected.

[0191] Figure 4 An example of a process flow 400 according to aspects of the present disclosure is shown. In some examples, the process flow 400 can implement aspects of the wireless communication system 100, 200, or 300. The process flow 400 can be implemented by access nodes 105-m, 105-n, and 105-o and a child node 405-a, which can be reference nodes. Figures 1 to 3 The access node 105-m may be a reference to an example of an access node 105 and a sub-node. Figure 2 and Figure 3An example of a donor access node 105 is depicted and may include a CU. Access nodes 105-n and 105-o may be examples of access nodes associated with access node 105-m (e.g., controlled by a CU) and may form part of a mobile IAB network including access nodes 105-m, 105-n, and 105-o and child node 405-a.

[0192] As reference Figures 1 to 3 As described above, the access node 105-o may be an example of a mobile IAB node. Figures 1 to 3 As described, subnode 405-a may be an example of a UE 115 or an access node 105. In some cases, subnode 405-a may represent a subnode of access node 105-o (e.g., if access node 105-o is turned on or in a higher power state). In some other cases, subnode 405-a may represent a subnode of access node 105-n (e.g., if access node 105-o is turned off or in a lower power state). In some cases, access node 105-o may move within a network so that access node 105-o may be located within a defined proximity of access node 105-n (e.g., or another access node 105 of a mobile IAB network). In this case, access nodes 105-m, 105-n, and 105-o and subnode 405-a may perform one or more power state change procedures according to the methods described herein.

[0193] In the following description of process flow 400, operations may be communicated in a different order than the exemplary order shown, or may be performed in a different order or at a different time. Some operations may also be excluded from process flow 400, or other operations may be added to process flow 400. It should be understood that although access nodes 105-m, 105-n, and 105-o and child node 405-a are shown as performing several operations of process flow 400, any wireless device may perform the operations shown.

[0194] At 410, the access node 105-m (e.g., CU) may transmit control signaling to the access node 105-o (e.g., and other access nodes 105) indicating one or more configuration parameters associated with triggering or completing a power state change procedure (e.g., a transition from a first power state to a second power state). Figure 3 The control signaling may indicate one or more trigger conditions (e.g., one or more thresholds), and may indicate one or more other parameters associated with a power state change (e.g., MT or DU state when disconnected). The control signaling may be or include an F1-AP message or an RRC message.

[0195] At 415, in some cases, child node 405-a may transmit a first measurement report (e.g., indicating one or more of signal strength, RSRP, RSRQ, SINR) of access node 105-n, of a different access node 105, or both to access node 105-o. In some cases, access node 105-o may transmit a second measurement report of access node 105-n, of a different access node 105, or both to access node 105-m. The second measurement report may be based on measurements made by access node 105-o, child node 405-a (e.g., indicated in the first measurement report), or both.

[0196] At 420, in some cases, access node 105-m or 105-o or both may detect that access node 105-n is within a defined proximity of access node 105-o, as described with reference to Figure 2 and Figure 3 For example, if one or more measurements in the second measurement report meet the triggering condition (e.g., exceed one or more thresholds), or in other measurements made by the access node 105-o, the access node 105-m or 105-o may determine that the access node 105-n is within the defined proximity. Alternatively, the access node 105-m or 105-o or both may not be able to detect the other access node 105 within the defined proximity of the access node 105-o, as described in reference Figure 2 and Figure 3 For example, if all measurements of the second measurement report or other measurements of the access node 105-o do not meet the trigger condition (eg, fall below or are below a threshold), the access node 105-m or 105-o may determine that no other access nodes 105 are within the defined proximity.

[0197] Block 425 illustrates procedures that may be taken if two mobile access nodes 105 (e.g., access nodes 105-n and 105-o) are detected to be within a defined proximity of each other. For example, access node 105-n may represent a fixed access node or another mobile access node 105. Using the method described at 420, access nodes 105-m, 105-n, and / or 105-o may detect that access nodes 105-n and 105-o are within a defined proximity. In some cases, based on the detection, one or both of access nodes 105-n and 105-o may transmit a status indication at 425-a to access node 105-m indicating the number of connected child nodes, mobility state, or power consumption level. As described in reference Figure 3As described, the access node 105-m can use the status indication to determine which mobile access node 105 to disconnect, if any. In some cases, at 425-b, the access nodes 105-n and 105-o can coordinate information (e.g., through one or more coordination messages) to determine which mobile access node 105 to disconnect. The one or more coordination messages may include a MAC CE or an F1-AP message. The F1-AP message can be transmitted from the corresponding mobile access node 105 to the access node 105-m (e.g., CU) and from the access node 105-m to another mobile access node 105.

[0198] At 430, in some cases, the access node 105-m or 105-o may determine to change the power state of the access node 105-n (e.g., turn it on or off). For example, based on determining that a trigger condition (e.g., a threshold) is satisfied, the access node 105-m or 105-o may determine to transition the access node 105-o to a new power state. Figure 3 The trigger condition may include a trigger condition for detecting the second access node 105 or may include one or more additional trigger conditions. The one or more additional trigger conditions may include a signal strength threshold, a parent node threshold, an interference level threshold, a power consumption level threshold, or a transmission power threshold. If the corresponding measurement is higher than the threshold or equal to or lower than the threshold, the trigger condition may be satisfied. For example, if the measurement exceeds the threshold, it may be determined to switch to a lower power state (e.g., disconnected), and if the measurement is less than or equal to the threshold, it may be determined to switch to a higher power state (e.g., connected).

[0199] At 435, access node 105-m and access node 105-o may communicate a power state change indication indicating that access node 105-o is transitioning to a new power state (e.g., being switched on or off). The power state change indication may be based on a determination to change the power state (e.g., based on satisfying one or more trigger conditions associated with one or more configuration parameters). For example, if access node 105-o determines to change its power state, access node 105-o may transmit a power state change indication to access node 105-m. Similarly, if access node 105-m determines to change the power state of access node 105-o, access node 105-m may transmit a power state change indication to access node 105-o. In some cases, the power state change indication may include one or more parameters, such as an action time or an ID of a detected access node. In some cases, the power state change indication may trigger a switching procedure for any child node 405 of access node 105-o. The power state change indication may be communicated via an F1-AP message or an RRC message. In some cases, the power state change indication may be communicated to the child node 405 - a via a MAC CE (eg, from the access node 105 - o or from the access node 105 - m via the access node 105 - o ).

[0200] At 440, in some cases, the access node 105-m and the child node 405-a may exchange switching information based on the power state change indication. For example, the access node 105-m may transmit a switching indication to the child node 405-a to initiate the child node 405-a to perform a search for a new parent access node 105. In some cases, the power state change indication may be used as a switching indication to the child node 405-a. The child node 405-a may search for a new parent access node 105 (e.g., may perform one or more signal measurements) and may transmit a switching measurement report to the access node 105-m (e.g., via the access node 105-o). The access node 105-m may use the switching measurement report to determine a new parent access node 105 for the child node 405-a.

[0201] At 445, in some cases, access node 105-m may transmit a switching instruction to access node 105-o based on the power state change indication to instruct access node 105-o to switch child node 405-a (e.g., to access node 105-n or a different access node 105). In some cases, access node 105-o may forward or retransmit a portion of the switching instruction to child node 405-a to notify child node 405-a of the switch.

[0202] At 450, in some cases, the access node 105-o and the child node 405-a may establish communication between the child node 405-a and the new parent access node 105 based on the handover instruction. For example, the access node 105-o and the child node 405-a may establish communication between the child node 405-a and the access node 105-n. Once communication is established with the new parent access node 105, the associated handover procedure may be considered complete.

[0203] At 455, the access node 105-o may transition between the first power state and the second power state. For example, the access node 105-o may be disconnected or connected. In some cases, the access node 105-o may transition to a lower power state (e.g., disconnected) based on having completed a switching procedure. Figure 3 As described, disconnection may include limiting some or all signals from the DU and limiting some communications from the MT of the access node 105-o. Connection may include lifting restrictions on DU signaling and MT communications.

[0204] In some cases, if access node 105-o is disconnected, child node 405-a may transmit and receive communications via a different parent access node 105, such as access node 105-n. For example, in the event that a handover procedure is performed back to access node 105-o (e.g., in response to access node 105-o being back on), child node 405-a may transmit measurement reports to access node 105-n (e.g., which may be forwarded to access node 105-m), may transmit and receive handover information via access node 105-n, may receive power state change indications via access node 105-n, may receive handover instructions from access node 105-n, and may establish communications with access node 105-o.

[0205] Figure 5 A block diagram 500 of an apparatus 505 according to aspects of the present disclosure is shown. The apparatus 505 may be an example of aspects of the access node 105 as described herein. The apparatus 505 may include a receiver 510, a communication manager 515, and a transmitter 520. The apparatus 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0206] Receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to the techniques described herein). The information may be passed to other components of apparatus 505. Receiver 510 may be a reference Figure 8 Examples of various aspects of the transceiver 820 are described. The receiver 510 may use a single antenna or a group of antennas.

[0207] The communication manager 515 may receive control signaling indicating at least one configuration parameter associated with triggering a mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state. The communication manager 515 may also communicate a power state change indication with a CU access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0208] The communication manager 515 may transmit control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state. The communication manager 515 may also communicate a power state change indication with the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied. The communication manager 515 may be an example of aspects of the communication manager 810 described herein.

[0209] The communication manager 515 or its subcomponents may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 515 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0210] The communication manager 515 or its subcomponents can be physically located in various locations, including being distributed so that part of the functionality is implemented by one or more physical components at different physical locations. In some examples, the communication manager 515 or its subcomponents can be separate and distinct components according to various aspects of the present disclosure. In some examples, the communication manager 515 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components according to various aspects of the present disclosure, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0211] The transmitter 520 may transmit signals generated by other components of the device 505. In some examples, the transmitter 520 may be collocated with the receiver 510 in the transceiver module. For example, the transmitter 520 may be a reference Figure 8Examples of various aspects of the transceiver 820 are described. The transmitter 520 may use a single antenna or a group of antennas.

[0212] The actions performed by the communication manager 515 as described herein may be implemented to achieve one or more potential advantages. For example, the communication manager 515 may improve communication reliability and reduce interference at the UE 115 or access node 105 by reducing one or more interfering transmissions (e.g., from different access nodes 105), which may reduce transmission delays and reduce retransmissions. The communication manager 515 may save power and increase battery life at the UE 115 or access node 105 by reducing transmission delays and retransmissions. Similarly, the communication manager 515 may save power at the access node 105 by determining to transition the access node 105 to a lower power state.

[0213] Figure 6 A block diagram 600 of an apparatus 605 according to aspects of the present disclosure is shown. The apparatus 605 may be an example of aspects of the apparatus 505 or access node 105 as described herein. The apparatus 605 may include a receiver 610, a communication manager 615, and a transmitter 635. The apparatus 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0214] Receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to the techniques described herein). The information may be passed to other components of device 605. Receiver 610 may be a reference Figure 8 Examples of various aspects of the transceiver 820 are described. The receiver 610 may use a single antenna or a group of antennas.

[0215] Communications manager 615 may be an example of aspects of communications manager 515 as described herein. Communications manager 615 may include configuration parameter receiving component 620, power state change indicating component 625, and configuration parameter component 630. Communications manager 615 may be an example of aspects of communications manager 810 as described herein.

[0216] Configuration parameter receiving component 620 may receive control signaling indicating at least one configuration parameter associated with triggering a mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state.

[0217] The power state change indication component 625 can communicate a power state change indication with the CU access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that the trigger condition associated with the at least one configuration parameter is satisfied.

[0218] Configuration parameter component 630 can transmit control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state that consumes less power than the first power state.

[0219] Power state change indicating component 625 may additionally communicate a power state change indication with the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0220] The transmitter 635 may transmit signals generated by other components of the device 605. In some examples, the transmitter 635 may be collocated with the receiver 610 in the transceiver module. For example, the transmitter 635 may be a reference Figure 8 Examples of various aspects of the transceiver 820 are described. The transmitter 635 may use a single antenna or a group of antennas.

[0221] A processor of the access node 105 (eg, a processor that controls the receiver 610, the transmitter 635, or the reference Figure 8 The transceiver 820 described herein can improve communication reliability and accuracy by enabling the access node to enter a lower power state and reduce interfering transmissions (e.g., to one or more UEs 115 or other access nodes 105), which can reduce transmission delays and reduce retransmissions within the network (e.g., by referring to Figure 7 105). Further, the processor of the access node 105 may identify one or more configuration parameters (e.g., trigger conditions) to perform the processes described herein. The processor of the access node 105 may identify one or more configuration parameters of the access node 105 to save power and increase battery at the access node 105 and one or more other wireless devices (e.g., by strategically reducing interfering emissions and / or by causing the access node 105 to enter a lower power state).

[0222] Figure 7Block diagram 700 of a communication manager 705 is shown in accordance with aspects of the present disclosure. Communication manager 705 may be an example of aspects of communication manager 515, communication manager 615, or communication manager 810 described herein. Communication manager 705 may include configuration parameter receiving component 710, power state change indication component 715, switching component 720, power state change component 725, measurement reporting component 730, power state change indication component 735, configuration parameter component 740, switching manager component 745, measurement receiving component 750, and power state manager component 755. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0223] Configuration parameter receiving component 710 may receive control signaling indicating at least one configuration parameter associated with triggering a mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state. In some examples, configuration parameter receiving component 710 may receive control signaling that is an F1-AP message, a MAC CE, an RRC message, or any combination thereof. In some cases, the mobile access node is an IAB node and the associated wireless backhaul communication network is an IAB network.

[0224] The power state change indication component 715 can communicate a power state change indication with the CU access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that the trigger condition associated with the at least one configuration parameter is satisfied. In some examples, the power state change indication component 715 can communicate a power state change indication with the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that the trigger condition associated with the at least one configuration parameter is satisfied.

[0225] In some examples, the power state change indication component 715 can communicate a power state change indication to indicate that the mobile access node is transitioning from a first power state to a second power state corresponding to determining that the mobile access node is within a defined proximity of a second access node of the wireless backhaul communication network based on the at least one configuration parameter. In some examples, the power state change indication component 715 can receive a power state change indication indicating an ID of the second access node. In some examples, the power state change indication component 715 can transmit a power state change indication indicating an ID of the second access node.

[0226] In some examples, the power state change indication component 715 can communicate a power state change indication to indicate that the mobile access node is transitioning from the second power state to the first power state corresponding to a determination based on the at least one configuration parameter that the mobile access node is outside of a defined proximity of a second access node of the wireless backhaul communication network. In some examples, the power state change indication component 715 can transmit a power state change indication to the CU access node based on a determination that a trigger condition is satisfied. In some examples, the power state change indication component 715 can receive a power state change indication from the CU access node based on a determination that a trigger condition is satisfied.

[0227] In some examples, the power state change indication component 715 can receive control signaling indicating that the at least one configuration parameter includes a distance threshold, wherein the power state change indication is communicated based on an estimated distance between the mobile access node and the second access node satisfying the distance threshold. In some examples, the power state change indication component 715 can receive control signaling indicating that the at least one configuration parameter includes an interference level threshold, wherein the power state change indication is communicated based on an interference level estimate satisfying the interference level threshold.

[0228] In some examples, the power state change indication component 715 may receive control signaling indicating that the at least one configuration parameter includes a power consumption level threshold, wherein the power state change indication is communicated based on the power consumption measurement satisfying the power consumption level threshold. In some examples, the power state change indication component 715 may receive control signaling indicating that the at least one configuration parameter includes a parent measurement threshold, wherein the power state change indication is communicated based on the measurement of transmissions of a parent access node of the mobile access node by the MT of the mobile access node satisfying the parent measurement threshold.

[0229] In some examples, the power state change indication component 715 may receive control signaling indicating that the at least one configuration parameter includes an RRM measurement threshold, wherein the power state change indication is communicated based on an RRM measurement of a transmission of the second access node by the MT of the mobile access node satisfying the RRM measurement threshold. In some examples, the power state change indication component 715 may receive control signaling indicating that the at least one configuration parameter includes an inter-relay discovery measurement threshold, wherein the power state change indication is communicated based on an inter-relay discovery measurement of the MT of the mobile access node satisfying the inter-relay discovery measurement threshold.

[0230] In some examples, the power state change indication component 715 can receive control signaling indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication is communicated based on a signal strength measurement of the second access node satisfying the signal strength measurement threshold. In some examples, the power state change indication component 715 can receive control signaling indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication is communicated based on a signal strength measurement of the second access node observed by the child access node satisfying the signal strength measurement threshold.

[0231] In some examples, the power state change indication component 715 can receive a power state change indication indicating a time offset between the reception of the power state change indication and the time when the transition between the first power state and the second power state is to occur. In some examples, the power state change indication component 715 can transmit a power state change indication indicating a time offset between the transmission of the power state change indication and the time when the transition between the first power state and the second power state is to occur. In some examples, the power state change indication component 715 can receive the power state change indication based on an indication of the number of transmitting child access nodes.

[0232] The power state change indication component 715 may receive control signaling indicating that the at least one configuration parameter includes a transmission power level threshold, wherein the power state change indication is communicated based on the transmission power level of the mobile access node satisfying the transmission power level threshold. In some examples, the power state change indication component 715 may receive the power state change indication based on the transmit mobility state. In some examples, the power state change indication component 715 may receive the power state change indication based on an indication of the transmit power consumption level. In some examples, the power state change indication component 715 may communicate a power state change indication that is an F1-AP message, a MAC CE, an RRC message, or any combination thereof.

[0233] In some examples, the power state change indication component 715 can transmit a power state change indication based on the second mobility state of the mobile access node being greater than the first mobility state. In some examples, the power state change indication component 715 can convey a power state change indication so as to indicate that the mobile access node is transitioning from the first power state to the second power state corresponding to determining that the mobile access node is within a defined proximity of a second access node of the wireless backhaul communication network based on the at least one configuration parameter. In some examples, the power state change indication component 715 can receive a power state change indication indicating an ID of the second access node. In some examples, the power state change indication component 715 can transmit a power state change indication indicating an ID of the second access node.

[0234] In some examples, the power state change indication component 715 can communicate a power state change indication to indicate that the mobile access node is transitioning from the second power state to the first power state corresponding to a determination based on the at least one configuration parameter that the mobile access node is outside of a defined proximity of a second access node of the wireless backhaul communication network. In some examples, the power state change indication component 715 can transmit the power state change indication to the mobile access node based on a determination that a trigger condition is satisfied. In some examples, the power state change indication component 715 can receive a power state change indication from the mobile access node based on a determination that a trigger condition is satisfied.

[0235] In some examples, the power state change indication component 715 may transmit control signaling indicating that the at least one configuration parameter includes a distance threshold, wherein the power state change indication is communicated based on an estimated distance between the mobile access node and the second access node satisfying the distance threshold. In some examples, the power state change indication component 715 may transmit control signaling indicating that the at least one configuration parameter includes an interference level threshold, wherein the power state change indication is communicated based on an interference level estimate satisfying the interference level threshold. In some examples, the power state change indication component 715 may transmit control signaling indicating that the at least one configuration parameter includes a power consumption level threshold, wherein the power state change indication is communicated based on a power consumption measurement satisfying the power consumption level threshold.

[0236] In some examples, the power state change indication component 715 can transmit control signaling indicating that the at least one configuration parameter includes a transmission power level threshold, wherein the power state change indication is communicated based on the transmission power level of the mobile access node satisfying the transmission power level threshold. In some examples, the power state change indication component 715 can transmit control signaling indicating that the at least one configuration parameter includes a parent measurement threshold, wherein the power state change indication is communicated based on a measurement of a transmission of a parent access node of the mobile access node satisfying the parent measurement threshold.

[0237] In some examples, the power state change indication component 715 may transmit control signaling indicating that the at least one configuration parameter includes an RRM measurement threshold, wherein the power state change indication is communicated based on an RRM measurement of a transmission of the second access node by the MT of the mobile access node satisfying the RRM measurement threshold. In some examples, the power state change indication component 715 may transmit control signaling indicating that the at least one configuration parameter includes an inter-relay discovery measurement threshold, wherein the power state change indication is communicated based on an inter-relay discovery measurement of the MT of the mobile access node satisfying the inter-relay discovery measurement threshold.

[0238] In some examples, the power state change indication component 715 can transmit control signaling indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication is communicated based on the signal strength measurement of the second access node satisfying the signal strength measurement threshold. In some examples, the power state change indication component 715 can transmit control signaling indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication is communicated based on the signal strength measurement of the second access node observed by the child access node satisfying the signal strength measurement threshold.

[0239] In some examples, the power state change indication component 715 may transmit a power state change indication indicating a time offset between the receipt of the power state change indication and the time at which the transition between the first power state and the second power state is to occur. In some examples, the power state change indication component 715 may receive a power state change indication indicating a time offset between the receipt of the power state change indication and the time at which the transition between the first power state and the second power state is to occur. In some examples, the power state change indication component 715 may transmit a power state change indication to the mobile access node based on a random selection between the mobile access node and the second access node to determine which of the mobile access node and the second access node is to transition to the second power state.

[0240] In some examples, the power state change indication component 715 can transmit a power state change indication to the mobile access node based on the second number of sub-access nodes being less than the first number of sub-access nodes. In some examples, the power state change indication component 715 can transmit a power state change indication based on the second power consumption level being less than the first power consumption level. In some examples, the power state change indication component 715 can convey a power state change indication that is an F1-AP message, a MAC CE, an RRC message, or any combination thereof.

[0241] In some cases, the signal strength measurement is an RSRP measurement, an RSRQ measurement, an SINR, or any combination thereof. In some cases, the interference level estimate is generated based on the measured signal strength of the interference signal or a quality metric of data communication with one or more child nodes of the mobile access node, or both. In some cases, the quality metric is an SINR, a CQI, a BLER, or any combination thereof. In some cases, the signal strength measurement is an RSRP measurement, an RSRQ measurement, an SINR, or any combination thereof. In some cases, the signal strength measurement of the second access node is observed by the child access node.

[0242] The switching component 720 can perform a switching procedure based on the communication power state change indication to switch one or more child nodes of the mobile access node to a second access node or a different access node of the wireless backhaul communication network. In some examples, the switching component 720 can transmit a switching indication to the child access node to initiate the child access node to perform a search for a new parent access node.

[0243] The power state change component 725 may transition to the second power state based on the completion of the handover procedure. In some examples, the power state change component 725 may receive control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless communication of the DU of the mobile access node is suspended when in the second power state. In some examples, the power state change component 725 may receive control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless data communication of the DU of the mobile access node is suspended when in the second power state and the SSB is continued to be transmitted by the DU.

[0244] In some examples, the power state change component 725 may transmit an SSB including a cell inhibit flag indicating that wireless data communication may not be available from the DU when in the second power state. In some examples, the power state change component 725 may transmit the SSB within a window for performing an inter-relay discovery procedure when in the second power state. In some examples, the power state change component 725 may receive control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless data communication of the MT of the mobile access node is suspended when in the second power state and that the MT continues to monitor the SSB.

[0245] In some examples, the power state change component 725 may monitor an SSB that is a CD-SSB when in the second power state. In some examples, the power state change component 725 may monitor the SSB within a window for performing an inter-relay discovery procedure when in the second power state. In some examples, the power state change component 725 may receive control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless data communication of the MT of the mobile access node is suspended when in the second power state and one or more control signaling messages are continued to be communicated with the parent access node of the mobile access node. In some examples, the power state change component 725 may transition between the first power state and the second power state based on a time offset.

[0246] The measurement reporting component 730 can transmit a measurement report indicating a measurement of a second access node, a different access node, or both, wherein the power state change indication is communicated from the CU access node to the mobile access node based on the measurement report. In some examples, the measurement reporting component 730 can receive an indication of the measurement of the second access node, the different access node, or both from a child access node of the mobile access node.

[0247] In some examples, measurement reporting component 730 can generate an interference level estimate based on a measured signal strength of an interfering signal or a quality metric of data communications with one or more child nodes of the mobile access node, or both. In some examples, measurement reporting component 730 can receive from a child access node an indication of a signal strength measurement of a second access node observed by the child access node.

[0248] In some examples, the measurement report component 730 may transmit an indication of the number of sub-access nodes connected to the mobile access node. In some examples, the measurement report component 730 may transmit an indication of the mobility state of the mobile access node. In some examples, the measurement report component 730 may transmit an indication of the power consumption level of the mobile access node. In some examples, the measurement report component 730 may receive a first indication of the first mobility state of the second access node. In some cases, the measurement is a signal strength measurement, an RSRP measurement, an RSRQ measurement, a SINR, or any combination thereof. In some cases, the quality metric is a SINR, a CQI, a BLER, or any combination thereof.

[0249] The configuration parameter component 740 may transmit control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state. In some examples, the configuration parameter component 740 may transmit control signaling that is an F1-AP message, a MAC CE, an RRC message, or any combination thereof. In some cases, the CU node is a CU IAB node, the mobile access node is a mobile IAB node, and the wireless backhaul communication network is an IAB network.

[0250] The handover manager component 745 can transmit a handover instruction to the mobile access node based on communicating the power state change indication to instruct the mobile access node to handover one or more child access nodes of the mobile access node to a second access node or a different access node of the wireless backhaul communication network. In some examples, the handover manager component 745 can transmit a handover instruction that instructs the mobile access node to transmit a handover instruction to the child access node to initiate the child access node to perform a search for a new parent access node.

[0251] The measurement receiving component 750 may receive a measurement report indicating a measurement of a second access node, a different access node, or both, wherein the power state change indication is communicated from the CU access node to the mobile access node based on the measurement report. In some examples, the measurement receiving component 750 may receive a first indication of a first number of sub-access nodes connected to the mobile access node and a second indication of a second number of sub-access nodes connected to the second access node. In some examples, the measurement receiving component 750 may receive a first indication of a first power consumption level of the mobile access node and a second indication of a second power consumption level of the second access node. In some cases, the measurement is a signal strength measurement, an RSRP measurement, an RSRQ measurement, an SINR, or any combination thereof. In some cases, the measurement report indicates a measurement of a second access node, a different access node, or both made by a sub-access node.

[0252] The power state manager component 755 may transmit control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless communication of the DU of the mobile access node is suspended when in the second power state. In some examples, the power state manager component 755 may transmit control signaling indicating the at least one configuration parameter, the control signaling indicating that wireless data communication of the DU of the mobile access node is suspended when in the second power state and SSBs are continued to be transmitted by the DU. In some examples, the power state manager component 755 may transmit control signaling indicating the at least one configuration parameter, the control signaling indicating that SSBs including a cell inhibit flag are continued to be transmitted when in the second power state, the cell inhibit flag indicating that wireless data communication cannot be obtained from the DU.

[0253] In some examples, the power state manager component 755 may transmit control signaling indicating the at least one configuration parameter, the control signaling indicating that the SSB is continued to be transmitted within the window for performing the inter-relay discovery procedure when in the second power state. In some examples, the power state manager component 755 may transmit control signaling indicating the at least one configuration parameter, the control signaling indicating that the wireless data communication of the MT of the mobile access node is suspended and the SSB is continued to be monitored by the MT when in the second power state.

[0254] In some examples, the power state manager component 755 may transmit control signaling indicating the at least one configuration parameter, the control signaling indicating to continue monitoring the SSB that is a CD-SSB when in the second power state. In some examples, the power state manager component 755 may transmit control signaling indicating the at least one configuration parameter, the control signaling indicating to continue monitoring the SSB within a window for performing the inter-relay discovery procedure when in the second power state. In some examples, the power state manager component 755 may transmit control signaling indicating the at least one configuration parameter, the control signaling indicating to suspend wireless data communication of the MT of the mobile access node when in the second power state and to continue to communicate one or more control signaling messages with the parent access node of the mobile access node.

[0255] Figure 8 A diagram of a system 800 including an apparatus 805 is shown in accordance with aspects of the present disclosure. The apparatus 805 may be an example of or include components of the apparatus 505, the apparatus 605, or the access node 105 as described herein. The apparatus 805 may include components for two-way voice and data communications including components for transmitting and receiving communications including a communications manager 810, a network communications manager 815, a transceiver 820, an antenna 825, a memory 830, a processor 840, and an inter-station communications manager 845. These components may be in electronic communication via one or more buses (e.g., bus 850).

[0256] The communication manager 810 may receive control signaling indicating at least one configuration parameter associated with triggering a mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state. The communication manager 810 may also communicate a power state change indication with a CU access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0257] The communication manager 810 may transmit control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state. The communication manager 810 may also communicate a power state change indication with the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied.

[0258] The network communications manager 815 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 815 may manage the transfer of data communications for client devices such as one or more UEs 115.

[0259] The transceiver 820 may communicate bidirectionally via one or more antennas, wired links, or wireless links as described above. For example, the transceiver 820 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 820 may also include a modem for modulating packets and providing the modulated packets to an antenna for transmission, and demodulating packets received from an antenna.

[0260] In some cases, a wireless device may include a single antenna 825. However, in some cases, a device may have more than one antenna 825 that is capable of transmitting or receiving multiple wireless transmissions simultaneously.

[0261] The memory 830 may include random access memory (RAM), read-only memory (ROM), or a combination thereof. The memory 830 may store computer readable code 835 including instructions that, when executed by a processor (e.g., processor 840), cause the device to perform various functions described herein. In some cases, the memory 830 may contain a basic I / O system (BIOS), etc., which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0262] The processor 840 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 830) to cause the device 805 to perform various functions (e.g., functions or tasks that support the techniques described herein).

[0263] The inter-site communication manager 845 can manage communications with other access nodes 105 and can include a controller or scheduler for controlling communications with UE 115 that cooperates with other access nodes 105. For example, the inter-site communication manager 845 can coordinate scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-site communication manager 845 can provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between access nodes 105.

[0264] The code 835 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 835 may be stored in a non-transitory computer-readable medium such as a system memory or other type of memory. In some cases, the code 835 may not be directly executable by the processor 840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0265] Fig. 9 900 according to various aspects of the present disclosure. The operations of the method 900 may be implemented by the access node 105 or components thereof as described herein. For example, the operations of the method 900 may be implemented by reference to Figures 5 to 8 In some examples, the access node may execute an instruction set to control the functional elements of the access node to perform the functions described below. Additionally or alternatively, the access node may use dedicated hardware to perform various aspects of the functions described below.

[0266] At 905, the access node may receive control signaling indicating at least one configuration parameter associated with triggering a mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state. The operations of 905 may be performed according to the methods described herein. In some examples, aspects of the operations of 905 may be described with reference to Figures 5 to 8 The described configuration parameters receive components to execute.

[0267] At 910, the access node may communicate a power state change indication with a CU access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between a first power state and a second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied. The operations of 910 may be performed according to the methods described herein. In some examples, aspects of the operations of 910 may be described with reference to Figures 5 to 8 The described power state changes instruct components to perform.

[0268] Fig.101000 according to various aspects of the present disclosure. The operations of the method 1000 may be implemented by the access node 105 or components thereof as described herein. For example, the operations of the method 1000 may be implemented by reference to Figures 5 to 8 In some examples, the access node may execute an instruction set to control the functional elements of the access node to perform the functions described below. Additionally or alternatively, the access node may use dedicated hardware to perform various aspects of the functions described below.

[0269] At 1005, the access node may receive control signaling indicating at least one configuration parameter associated with triggering a mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state. The operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be described with reference to Figures 5 to 8 The described configuration parameters receive components to execute.

[0270] At 1010, the access node may communicate a power state change indication with a CU access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between a first power state and a second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied. The operations of 1010 may be performed according to the methods described herein. In some examples, aspects of the operations of 1010 may be described with reference to Figures 5 to 8 The described power state changes instruct components to perform.

[0271] At 1015, the access node may communicate a power state change indication to indicate that the mobile access node is transitioning from a first power state to a second power state corresponding to a determination based on the at least one configuration parameter that the mobile access node is within a defined proximity of a second access node of the wireless backhaul communication network. The operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operations of 1015 may be performed by reference to Figures 5 to 8 The described power state changes instruct components to perform.

[0272] At 1020, the access node may perform a handover procedure based on communicating the power state change indication to handover one or more child nodes of the mobile access node to a second access node or a different access node of the wireless backhaul communication network. The operations of 1020 may be performed according to the methods described herein. In some examples, aspects of the operations of 1020 may be performed as described in reference to Figures 5 to 8 The described switching components are performed.

[0273] Fig.11100 according to various aspects of the present disclosure. The operations of the method 1100 may be implemented by the access node 105 or components thereof as described herein. For example, the operations of the method 1100 may be implemented by reference to Figures 5 to 8 In some examples, the access node may execute an instruction set to control the functional elements of the access node to perform the functions described below. Additionally or alternatively, the access node may use dedicated hardware to perform various aspects of the functions described below.

[0274] At 1105, the access node may transmit control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state. The operations of 1105 may be performed according to the methods described herein. In some examples, aspects of the operations of 1105 may be described with reference to Figures 5 to 8 The described configuration parameters are implemented by the component.

[0275] At 1110, the access node may communicate a power state change indication to the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied. The operations of 1110 may be performed according to the methods described herein. In some examples, aspects of the operations of 1110 may be described with reference to Figures 5 to 8 The described power state changes instruct components to perform.

[0276] Fig.12 1 is a flowchart illustrating a method 1200 according to aspects of the present disclosure. The operations of the method 1200 may be implemented by the access node 105 or components thereof as described herein. For example, the operations of the method 1200 may be implemented by reference to Figures 5 to 8 In some examples, the access node may execute an instruction set to control the functional elements of the access node to perform the functions described below. Additionally or alternatively, the access node may use dedicated hardware to perform various aspects of the functions described below.

[0277] At 1205, the access node may transmit control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state. The operations of 1205 may be performed according to the methods described herein. In some examples, aspects of the operations of 1205 may be described with reference to Figures 5 to 8 The described configuration parameters are implemented by the component.

[0278] At 1210, the access node may communicate a power state change indication to the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied. The operations of 1210 may be performed according to the methods described herein. In some examples, aspects of the operations of 1210 may be described with reference to Figures 5 to 8 The described power state changes instruct components to perform.

[0279] At 1215, the access node may communicate a power state change indication to indicate that the mobile access node is transitioning from a first power state to a second power state corresponding to a determination based on the at least one configuration parameter that the mobile access node is within a defined proximity of a second access node of the wireless backhaul communication network. The operations of 1215 may be performed according to the methods described herein. In some examples, aspects of the operations of 1215 may be described with reference to Figures 5 to 8 The described power state changes instruct components to perform.

[0280] At 1220, the access node may transmit a handover instruction to the mobile access node based on the communicated power state change indication to instruct the mobile access node to handover one or more sub-access nodes of the mobile access node to a second access node or a different access node of the wireless backhaul communication network. The operations of 1220 may be performed according to the methods described herein. In some examples, aspects of the operations of 1220 may be performed as described in reference to Figures 5 to 8 The described switching manager component is performed.

[0281] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0282] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applied to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0283] The information and signals described herein may be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0284] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0285] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Other examples and implementations fall within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0286] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to transfer from one place to another place.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.As an example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage device, or can be used to carry or store instruction or data structure form of desired program code means and can be accessed by general or special-purpose computer or general or special-purpose processor any other non-transient medium.Similarly, any connection is also properly referred to as computer-readable medium.For example, if software is transmitted from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then this coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are just included in the definition of computer-readable medium. Disk and disc as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0287] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an example step described as being based on condition "A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0288] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between similar components. If only the first reference number is used in the specification, the description may apply to any of the similar components having the same first reference number regardless of the second reference number, or other subsequent reference numbers.

[0289] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that can be implemented or fall within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0290] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the universal principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication by a mobile access node of a wireless backhaul communication network, the method comprising: receiving control signaling indicating at least one configuration parameter associated with triggering the mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state; as well as transmitting a power state change indication to a central unit access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied, Wherein transmitting the power state change indication comprises: The power state change indication is transmitted to indicate that the mobile access node is transitioning from the first power state to the second power state corresponding to a determination based at least in part on the at least one configuration parameter that the mobile access node is within a defined proximity of a second access node of the wireless backhaul communication network.

2. The method of claim 1, wherein: Transmitting the power state change indication comprises: A handover procedure is performed to handover one or more child nodes of the mobile access node to the second access node or a different access node of the wireless backhaul communication network based at least in part on communicating the power state change indication.

3. The method of claim 2, further comprising: Transitioning to the second power state is based at least in part on completion of the switching procedure.

4. The method of claim 2, further comprising: A measurement report is transmitted indicating measurements of the second access node, a different access node, or both, wherein the power state change indication is communicated from the central unit access node to the mobile access node based at least in part on the measurement report.

5. The method of claim 4, further comprising: An indication of the measurements of the second access node, the different access node, or both is received from a child access node of the mobile access node.

6. The method of claim 2, wherein: Transmitting the power state change indication comprises: The power state change indication is transmitted indicating an identifier of the second access node.

7. The method of claim 2, wherein: Executing the switching procedure includes: A handover indication is transmitted to a child access node to initiate the child access node to perform a search for a new parent access node.

8. The method of claim 1, wherein: Transmitting the power state change indication comprises: The power state change indication is transmitted to indicate that the mobile access node is transitioning from the second power state to the first power state corresponding to a determination based at least in part on the at least one configuration parameter that the mobile access node is outside a defined proximity of a second access node of the wireless backhaul communication network.

9. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating that the at least one configuration parameter includes a transmit power level threshold, wherein the power state change indication is communicated based at least in part on a transmit power level of the mobile access node satisfying the transmit power level threshold.

10. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating the at least one configuration parameter indicating to suspend wireless communications of distributed units of the mobile access node while in the second power state.

11. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating the at least one configuration parameter indicating that wireless data communications of a distributed unit of the mobile access node are suspended and synchronization signal blocks are continued to be transmitted by the distributed unit when in the second power state.

12. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating the at least one configuration parameter indicating that wireless data communications of a mobile terminal of the mobile access node are suspended while in the second power state and that monitoring of synchronization signal blocks by the mobile terminal is continued.

13. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating the at least one configuration parameter indicating to suspend wireless data communications of a mobile terminal of the mobile access node while in the second power state and to continue to communicate one or more control signaling messages with a parent access node of the mobile access node.

14. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating that the at least one configuration parameter includes a distance threshold, wherein the power state change indication is communicated based at least in part on an estimated distance between the mobile access node and a second access node satisfying the distance threshold.

15. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating that the at least one configuration parameter includes an interference level threshold, wherein the power state change indication is communicated based at least in part on an interference level estimate satisfying the interference level threshold.

16. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating that the at least one configuration parameter includes a power consumption level threshold, wherein the power state change indication is communicated based at least in part on a power consumption measurement satisfying the power consumption level threshold.

17. The method of claim 1, wherein: Receiving the control signaling includes: Control signaling is received indicating that the at least one configuration parameter includes a parent measurement threshold, wherein the power state change indication is communicated based at least in part on measurements of transmissions of a parent access node of the mobile access node by a mobile terminal of the mobile access node satisfying the parent measurement threshold.

18. The method of claim 1, wherein: Receiving the control signaling includes: receiving the control signaling indicating that the at least one configuration parameter includes a radio resource management measurement threshold, wherein the power state change indication is communicated based at least in part on radio resource management measurements of transmissions of the second access node by a mobile terminal of the mobile access node satisfying the radio resource management measurement threshold.

19. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating that the at least one configuration parameter includes an inter-relay discovery measurement threshold, wherein the power state change indication is communicated based at least in part on inter-relay discovery measurements of a mobile terminal of the mobile access node satisfying the inter-relay discovery measurement threshold.

20. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication is communicated based at least in part on a signal strength measurement for a second access node satisfying the signal strength measurement threshold.

21. The method of claim 1, wherein: Receiving the control signaling includes: The control signaling is received indicating that the at least one configuration parameter includes a signal strength measurement threshold, wherein the power state change indication is communicated based at least in part on a signal strength measurement observed by the child access node for the second access node satisfying the signal strength measurement threshold.

22. The method of claim 1, wherein: Transmitting the power state change indication comprises: transmitting the power state change indication indicating a time offset between transmission of the power state change indication and a time at which a transition between the first power state and the second power state is to occur; and Transitioning between the first power state and the second power state is based at least in part on the time offset.

23. A method for wireless communications by a central unit node of a wireless backhaul communications network, the method comprising: transmitting control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state; as well as receiving a power state change indication from the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied, Wherein receiving the power state change indication comprises: The power state change indication is received to indicate that the mobile access node is transitioning from the first power state to the second power state corresponding to a determination based at least in part on the at least one configuration parameter that the mobile access node is within a defined proximity of a second access node of the wireless backhaul communication network.

24. An apparatus for wireless communication by a mobile access node of a wireless backhaul communication network, the apparatus comprising: means for receiving control signaling indicating at least one configuration parameter associated with triggering the mobile access node to transition between a first power state and a second power state, the second power state consuming less power than the first power state; as well as means for transmitting a power state change indication to a central unit access node of the wireless backhaul communication network to indicate that the mobile access node is transitioning between the first power state and the second power state in response to determining that a trigger condition associated with the at least one configuration parameter is satisfied, The means for transmitting the power state change indication further comprises: Means for transmitting the power state change indication to indicate that the mobile access node is transitioning from the first power state to the second power state corresponding to a determination based at least in part on the at least one configuration parameter that the mobile access node is within a defined proximity of a second access node of the wireless backhaul communications network.

25. The apparatus of claim 24, wherein: The means for transmitting the power state change indication further comprises: Means for performing a handover procedure to handover one or more child nodes of the mobile access node to the second access node or a different access node of the wireless backhaul communication network based at least in part on the power state change indication.

26. An apparatus for wireless communication by a central unit node of a wireless backhaul communication network, the apparatus comprising: means for transmitting control signaling indicating at least one configuration parameter associated with triggering a mobile access node of the wireless backhaul communication network to transition between a first power state and a second power state, the second power state consuming less power than the first power state; as well as means for receiving a power state change indication from the mobile access node to indicate that the mobile access node is transitioning between the first power state and the second power state corresponding to determining that a trigger condition associated with the at least one configuration parameter is satisfied, The device for receiving the power state change indication includes: Means for receiving the power state change indication to indicate that the mobile access node is transitioning from the first power state to the second power state corresponding to a determination based at least in part on the at least one configuration parameter that the mobile access node is within a defined proximity of a second access node of the wireless backhaul communications network.

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