Techniques for coordinating scheduling wireless communications using a repeater

Aspects described herein relate to receiving, at a repeater and from a serving base station, one or more transmitted downlink beams, receiving, at the repeater and from a downstream node served by the serving base station, one or more transmitted uplink beams, and transmitting, to the serving base station, one or more parameters related to determining a channel quality metric using at least the one or more transmitted downlink beams and the one or more transmitted uplink beams.

BACKGROUND

Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to wireless communications using repeaters between base stations and downstream nodes.

These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. For example, a fifth generation (5G) wireless communications technology (which can be referred to as 5G new radio (5G NR)) is envisaged to expand and support diverse usage scenarios and applications with respect to current mobile network generations. In an aspect, 5G communications technology can include: enhanced mobile broadband addressing human-centric use cases for access to multimedia content, services and data; ultra-reliable-low latency communications (URLLC) with certain specifications for latency and reliability; and massive machine type communications, which can allow a very large number of connected devices and transmission of a relatively low volume of non-delay-sensitive information.

In wireless communication technologies such as 5G NR, nodes can beamform antenna resources to transmit and receive beams in certain spatial directions to improve hearability of the signals. In addition, repeaters can be used between nodes to receive and forward communications therebetween to further improve hearability of the signals and improve quality of communications between the nodes. There are multiple types of repeaters that can be used in wireless communications (e.g., in 5G NR), including: a first class of repeater that has no control from gNB, fixed beamforming, amplify-forward functionality, and full-duplex capability (referred to herein as a “class A repeater”); a second class of repeater that has some level of control from gNB (such as for beamforming and uplink/downlink direction), amplify-forward functionality, and full-duplex capability (referred to herein as a “class B repeater”); and a third class of repeater that can have more control from gNB, decode-forward functionality, and possibly half-duplex constraint (referred to herein as a “class C repeater,” which may, e.g., include integrated access and backhaul nodes).

SUMMARY

According to an example, a method for wireless communications is provided that includes receiving, at a repeater and from a serving base station, one or more transmitted downlink beams, receiving, at the repeater and from a downstream node served by the serving base station, one or more transmitted uplink beams, and transmitting, to the serving base station, one or more parameters related to determining a channel quality metric using at least the one or more transmitted downlink beams and the one or more transmitted uplink beams.

In another example, a method for wireless communication is provided that includes transmitting, by a serving base station, one or more transmitted downlink beams, receiving, from a repeater, one or more parameters related to determining a channel quality metric using at least one downlink beam of the one or more transmitted downlink beams and at least one uplink beam of one or more transmitted uplink beams transmitted by a downstream node that is served by the serving base station, determining, based at least in part on the one or more parameters, the channel quality metric, determining, based at least in part on the channel quality metric, a configuration for communicating with the downstream node, and communicating, based on the configuration, with the downstream node via the repeater

In another aspect, an apparatus for wireless communication is provided that includes means for performing the operations of methods described herein. In yet another aspect, a computer-readable medium is provided including code executable by one or more processors to perform the operations of methods described herein.

DETAILED DESCRIPTION

The described features generally relate to configuring repeaters to report parameters relating to channel quality to upstream nodes, such as a base station, to enable the upstream node to schedule communications to downstream nodes based on the parameters. In some wireless communication technologies, such as fifth generation (5G) new radio (NR), an amplify-forward repeater can be used that can operate in full-duplex mode with some control from a base station or other upstream node (e.g., a class B repeater, an upstream integrated access and backhaul (IAB) node, etc.). An IAB node, for example, may be a node that has an access node (AN) function (AN-F) to facilitate transmitting downlink communications to, or receiving uplink communications from, one or more downstream nodes (e.g., one or more other IAB nodes, user equipment (UEs), repeaters, etc.) and a UE function (UE-F) to facilitate transmitting uplink communications to, or receiving downlink communications from, one or more upstream nodes (e.g., one or more other IAB nodes, repeaters, base stations, etc.).

In an example, an amplify-forward repeater can efficiently use available resources by operating in full duplex, which can potentially increase the system capacity, as compared to a decode-forward repeater, can experience or exhibit less forwarding latency (e.g., no extra latency for further intermediate frequency (IF)/baseband frequency (BB) processing, and no extra latency due to half-duplex operation), as compared to a decode-forward repeater, etc. An amplify-forward repeater, however, may also amplify unwanted signals (e.g., noise and interference) along with the wanted signal, which may result in reduction of overall effective signal-to-interference-and-noise ratio (SINR).

In an example, a class B repeater, which can also be referred to as a Layer 1 (L1) millimeter wave (MMW) repeater, can perform at least one or more of the following operations: receive analog signals on its receive (RX) antennas (e.g., based on some configured RX beamforming), amplify the power of the received analog signal, transmit the amplified signal from its transmit (TX) antennas (e.g., based on some configured TX beamforming), and/or communicate some control signals with an upstream node or a server (e.g., serving base station, donor node, control node, IAB node, etc.) via a control interface, where control interface can be out-of-band (e.g., using a different radio technology, such as Bluetooth, or different frequency, such as a frequency for long term evolution (LTE) narrowband (NB)-Internet of Things (IoT), etc.), or in-band (e.g., using a bandwidth part of the same carrier frequency that is used to receive and/or transmit the analog signals. When using a class B repeater, the effective signal-to-noise ratio (SNR) of a link between nodes that use the repeater can be a function of SNR on each link between each node and the repeater as well as certain internal radio frequency (RF) parameters of the repeater.

Aspects described herein relate to conveying, by a repeater, at least some of the parameters to a base station or other upstream node to facilitate determining a channel quality over the various links between the base station, repeater, and downstream node(s), and accordingly scheduling communications based on the determined channel quality. For example, the repeater can report the internal RF parameter values to the base station and/or can report channel quality metrics measured by the repeater on signals received from the base station and/or from the downstream node(s). The base station can accordingly receive the parameter values, determine the channel quality, and schedule one or more aspects of the communications based on the channel quality (e.g., a modulation and coding scheme (MCS), transmit or receive beam, transmit or receive power, etc.). Scheduling based on these parameters can be an improvement over the base station measuring values, at least because base station measurements may require downstream nodes to transmit/receive signals using all of multiple beams for each of multiple beams transmitted/received by the base station, whereas measurements at the repeater may only require the base station to transmit using each of its beams and the downstream nodes to transmit using each of their beams to perform all measurements. In addition, using the repeater to provide information may allow for more accurate consideration of the internal RF parameters of the repeater.

The described features will be presented in more detail below with reference toFIGS.1-8.

FIG.1is a diagram illustrating an example of a wireless communications system and an access network100. The wireless communications system (also referred to as a wireless wide area network (WWAN)) can include base stations102, UEs104, an Evolved Packet Core (EPC)160, and/or a 5G Core (5GC)190. The base stations102may include macro cells (high power cellular base station) and/or small cells (low power cellular base station). The macro cells can include base stations. The small cells can include femtocells, picocells, and microcells.

The 5GC190may include a Access and Mobility Management Function (AMF)192, other AMFs193, a Session Management Function (SMF)194, and a User Plane Function (UPF)195. The AMF192may be in communication with a Unified Data Management (UDM)196. The AMF192can be a control node that processes the signaling between the UEs104and the 5GC190. Generally, the AMF192can provide QoS flow and session management. User Internet protocol (IP) packets (e.g., from one or more UEs104) can be transferred through the UPF195. The UPF195can provide UE IP address allocation for one or more UEs, as well as other functions. The UPF195is connected to the IP Services197. The IP Services197may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and/or other IP services.

The base station may also be referred to as a gNB, Node B, evolved Node B (eNB), an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit reception point (TRP), or some other suitable terminology. The base station102provides an access point to the EPC160or 5GC190for a UE104. Examples of UEs104include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device. Some of the UEs104may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc.). IoT UEs may include machine type communication (MTC)/enhanced MTC (eMTC, also referred to as category (CAT)-M, Cat M1) UEs, NB-IoT (also referred to as CAT NB1) UEs, as well as other types of UEs. In the present disclosure, eMTC and NB-IoT may refer to future technologies that may evolve from or may be based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (enhanced further eMTC), mMTC (massive MTC), etc., and NB-IoT may include eNB-IoT (enhanced NB-IoT), FeNB-IoT (further enhanced NB-IoT), etc. The UE104may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

In an example, base stations102can communicate with UEs104via one or more repeaters, as described further in reference toFIG.2. Repeaters can include one or more of a class A repeater, a class B repeater, or a class C repeater, which can have varying levels of control by the base station102or other network components, as described.

Referring toFIG.2, in accordance with various aspects described herein, an example of another wireless communication access network200that uses repeaters is depicted. The wireless communication access network200can include a base station102that can communicate with one or more UEs104and/or repeaters204, where the repeaters can be positioned between the base station102(and/or one or more intermediate upstream repeaters) and a UE104(and/or one or more intermediate downstream repeaters). In an example, the repeaters204can be class B repeaters that allow some control by the base station102(e.g., for beamforming, uplink/downlink direction indication, etc.), and can provide an amplify-forward functionality for communications to/from a UE104and may operate in full duplex.

As described, in an example, a repeater204can include components for amplifying and forwarding transmissions and for transmitting control data to and/or receiving control data from other nodes, such as a base station102. For example, repeater204can include a controller220that can control multiple phased arrays222,224(e.g., arrays of antennas) and a variable gain function226for amplifying received signals. For example, repeater can receive signals from a base station102, a UE104, or another upstream or downstream node (e.g., another repeater) via phased array222. The repeater204can amplify the received signals via variable gain226and can transmit the signals to a UE104, base station102, or another downstream or upstream node (e.g., another repeater) via phased array224. In an example, repeater204can communicate in full duplex by concurrently receiving signals via phased array222and transmitting signals via phased array224. In addition, control interface228can communicate control information to the base station102and/or a UE104(e.g., via a modem240and/or communicating component242, as described further herein) and/or can receive control information from the base station102and/or the UE104.

In a specific example, as described herein, communicating component242of a repeater can communicate one or more parameters to the base station102to facilitate estimating a channel quality metric and accordingly scheduling UEs or other downstream nodes that communicate with the repeater204. For example, communicating component242can report, to the base station, one or more internal RF parameters, measurements of downlink beams transmitted by the base station102and/or uplink beams transmitted by the UE104or other downstream node, etc. Scheduling component246(e.g., via modem244) can receive the one or more parameters from the repeater204, and can accordingly estimate a channel quality metric and schedule one or more UEs for communications. For example, scheduling component246can determine and/or specify one or more parameters for the UEs to receive communications from the base station102and/or transmit communications to the base station102, as described further herein.

Additionally, for example, the base station102, repeater204, and/or UE104can each be capable of beamforming antenna resources to transmit beams to, and/or receive beams from, one another. Beamforming antenna resources can include selectively applying power to the antenna resources to achieve a spatial directionality for the antenna resources, which can be used to transmit or receive signals. This can optimize communications between the nodes. In an example, nodes can provide feedback to one another regarding which of multiple possible beams should be used or are desired to be used. For example, the nodes can perform a beam management procedure (e.g., beam training) where multiple beams can be transmitted by one node (e.g., the base station102) and measured by other nodes (e.g., the repeater204and/or UE104) to determine which beam is optimal. The other nodes can indicated the desired beam to the one node, and the one node can transmit and/or receive based on the beam. The other nodes can receive and/or transmit based on a reciprocal beam.

In one example, in a downlink (DL) operation, repeater204can receive an analog signal from a base station102or an upstream node (e.g., an intermediate (higher-tier) repeater, an upstream IAB node, etc.) using an RX beam, then amplify and forward the signal on a TX beam towards the UE or another downstream node (e.g., a lower-tier repeater, a downstream IAB node, etc.). In an uplink (UL) operation, for example, repeater204can receive an analog signal from a UE104or a downstream repeater (e.g., an intermediate (lower-tier) repeater) on an RX beam, then amplify and forward the signal on a TX beam towards the base station102or another upstream repeater (e.g., a higher-tier repeater). The effective DL rate can be a function of the end-to-end SNR of the path from the base station102to the UE104. The effective UL rate can be a function of the end-to-end SNR of the path from the UE to the base station. The end-to-end SNR along the path between a UE and a base station can in turn be a function of the SNR associated with each link along this path and one or more internal parameters at the UE and the intermediate repeaters, including noise figure at repeaters and UE, max power gain and/or max output power, switching latency at repeaters (e.g., to switch between transmitting and receiving), coupling effect at repeaters, etc.

FIG.3illustrates an example of a system300for beamforming communications between a base station, one or more repeaters, one or more UEs, etc. A base station102can communicate with one or more repeaters204using one or more beams (e.g., two beams are shown), which may be determined or selected from a set of multiple possible beams that the base station102can achieve by beamforming antenna resources, as described. Similarly, each repeater204can have multiple possible beams (e.g., three are shown for each repeater) that can be used in communicating with one or more UEs104. The channel quality between the base station102and UE104can be a function of channel quality between the base station102and the repeater204(on a selected beam) and between the repeater204and the UE104(on a selected beam) as well as internal RF parameters of the repeater204, as described. The base station102can schedule communication resources for the UE104based on at least one of the channel quality on one or more of the links and/or internal parameters of the repeater204, one or more of which can be received from the repeater204.

Where the base station102facilitates performing channel measurements without assistance from the repeater204, for example, the base station102may need to transmit each of its beams to the repeater204while the UE104receives using each of its beams to receive the forwarded signal from the repeater204for each transmitted beam. In some examples described herein, however, the repeater204can assist the base station102by measuring channel quality of beams associated with the UE104and beams associated with the base station102, and reporting the measurements to the base station102, which can decrease the total number of beams to be transmitted to complete this procedure. For example, the repeater204can determine end-to-end SNR of communications between the base station102and the UE104, via the repeater204, by measuring SNR of the link between the base station102and repeater204(based on the corresponding beam), measuring SNR of the link between the UE104and the repeater204(based on the corresponding beam), incorporating internal parameters of the repeater204, etc.

Referring toFIG.4, one example of an implementation of a repeater204may include a variety of components, some of which have already been described above and are described further herein, including components such as one or more processors412and memory416and transceiver402in communication via one or more buses444, which may operate in conjunction with modem240and/or a communicating component242to report parameters to a base station to facilitate scheduling UEs or other downstream nodes and to facilitate communications between the base station and UEs or other downstream nodes. For example, communicating component242can optionally include a parameter determining component442for determining one or more parameters related to determining a channel quality metric, and/or a forwarding component446for forwarding communications received from the base station102to the UEs or other downstream nodes and/or vice versa.

In an aspect, the one or more processors412can include a modem240and/or can be part of the modem240that uses one or more modem processors. Thus, the various functions related to communicating component242may be included in modem240and/or processors412and, in an aspect, can be executed by a single processor, while in other aspects, different ones of the functions may be executed by a combination of two or more different processors. Moreover, the repeater204can include the other components described in reference toFIG.2for communicating (e.g., the controller220, phased arrays222,224, variable gain function226, etc., which may be part of RF front end488, the control interface228, which may communicate via communicating component242to report and/or receive certain information to/from a base station102or other node, etc., as described further herein). For example, in an aspect, the one or more processors412may include any one or any combination of a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or a transceiver processor associated with transceiver402. In other aspects, some of the features of the one or more processors412and/or modem240associated with communicating component242may be performed by transceiver402.

Also, memory416may be configured to store data used herein and/or local versions of applications475or communicating component242and/or one or more of its subcomponents being executed by at least one processor412. Memory416can include any type of computer-readable medium usable by a computer or at least one processor412, such as random access memory (RAM), read only memory (ROM), tapes, magnetic discs, optical discs, volatile memory, non-volatile memory, and any combination thereof. In an aspect, for example, memory416may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining communicating component242and/or one or more of its subcomponents, and/or data associated therewith, when repeater204is operating at least one processor412to execute communicating component242and/or one or more of its subcomponents.

Transceiver402may include at least one receiver406and at least one transmitter408. Receiver406may include hardware, firmware, and/or software code executable by a processor for receiving data, the code comprising instructions and being stored in a memory (e.g., computer-readable medium). Receiver406may be, for example, a radio frequency (RF) receiver. In an aspect, receiver406may receive signals transmitted by an upstream node, a downstream node, etc. Additionally, receiver406may process such received signals, and also may obtain measurements of the signals, such as, but not limited to, Ec/Io, SNR, reference signal received power (RSRP), received signal strength indicator (RSSI), etc. Transmitter408may include hardware, firmware, and/or software code executable by a processor for transmitting data, the code comprising instructions and being stored in a memory (e.g., computer-readable medium). A suitable example of transmitter408may including, but is not limited to, an RF transmitter.

Moreover, in an aspect, repeater204may include RF front end488, which may operate in communication with one or more antennas465and transceiver402for receiving and transmitting radio transmissions, for example, wireless communications transmitted by at least one base station102or wireless transmissions transmitted by a UE or other downstream node. RF front end488may be connected to one or more antennas465and can include one or more low-noise amplifiers (LNAs)490, one or more switches492, one or more power amplifiers (PAs)498, and one or more filters496for transmitting and receiving RF signals.

In an aspect, LNA490can amplify a received signal at a desired output level. In an aspect, each LNA490may have a specified minimum and maximum gain values. In an aspect, RF front end488may use one or more switches492to select a particular LNA490and its specified gain value based on a desired gain value for a particular application.

Further, for example, one or more PA(s)498may be used by RF front end488to amplify a signal for an RF output at a desired output power level. In an aspect, each PA498may have specified minimum and maximum gain values. In an aspect, RF front end488may use one or more switches492to select a particular PA498and its specified gain value based on a desired gain value for a particular application.

Also, for example, one or more filters496can be used by RF front end488to filter a received signal to obtain an input RF signal. Similarly, in an aspect, for example, a respective filter496can be used to filter an output from a respective PA498to produce an output signal for transmission. In an aspect, each filter496can be connected to a specific LNA490and/or PA498. In an aspect, RF front end488can use one or more switches492to select a transmit or receive path using a specified filter496, LNA490, and/or PA498, based on a configuration as specified by transceiver402and/or processor412.

As such, transceiver402may be configured to transmit and receive wireless signals through one or more antennas465via RF front end488. In an aspect, transceiver402may be tuned to operate at specified frequencies such that repeater204can communicate with, for example, one or more upstream nodes (e.g., base stations102, upstream IAB nodes, other repeaters, etc.) or one or more cells associated with one or more upstream nodes, one or more downstream nodes (e.g., UEs104, downstream IAB nodes, other repeaters, etc.), and/or the like. In an aspect, for example, modem240can configure transceiver402to operate at a specified frequency and power level based on a configuration of the repeater204and the communication protocol used by modem240.

In an aspect, modem240can be a multiband-multimode modem, which can process digital data and communicate with transceiver402such that the digital data is sent and received using transceiver402. In an aspect, modem240can be multiband and be configured to support multiple frequency bands for a specific communications protocol. In an aspect, modem240can be multimode and be configured to support multiple operating networks and communications protocols. In an aspect, modem240can control one or more components of repeater204(e.g., RF front end488, transceiver402) to enable transmission and/or reception of signals from the network or UEs, upstream nodes or downstream nodes, etc. based on a specified modem configuration. In an aspect, the modem configuration can be based on the mode of the modem and the frequency band in use. In another aspect, the modem configuration can be based on configuration information associated with repeater204as provided by the network during cell selection and/or cell reselection or initial access.

In an aspect, the processor(s)412may correspond to one or more of the processors described in connection with the repeater204inFIG.8. Similarly, the memory416may correspond to the memory described in connection with the repeater204inFIG.8.

Referring toFIG.5, one example of an implementation of a base station102may include a variety of components, some of which have already been described above, but including components such as one or more processors512and memory516and transceiver502in communication via one or more buses544, which may operate in conjunction with modem244to provide backhaul access to a core network. In addition, the one or more processors512and memory516and transceiver502etc. may optionally operate with a scheduling component246for scheduling UEs or other downstream nodes for communication based on parameters received from a repeater. In an example, scheduling component246can optionally include a parameter processing component542for processing one or more parameters received from a repeater, and/or a quality estimating component546for estimating a channel quality metric based on the one or more parameters.

The transceiver502, receiver506, transmitter508, one or more processors512, memory516, applications575, buses544, RF front end588, LNAs590, switches592, filters596, PAs598, and one or more antennas565may be the same as or similar to the corresponding components of repeater204, as described above, but configured or otherwise programmed for the base station102as opposed to repeater operations.

In an aspect, the processor(s)512may correspond to one or more of the processors described in connection with the base station inFIG.8to schedule UEs, as described. Similarly, the memory516may correspond to the memory described in connection with the base station inFIG.8to schedule UEs, as described.

FIG.6illustrates a flow chart of an example of a method600for reporting information related to determining a channel quality metric. In an example, a repeater204can perform one or more of the functions described in method600using one or more of the components described inFIGS.2and4.

In method600, at Block602, one or more transmitted downlink beams can be received from a serving base station. In an aspect, communicating component242, e.g., in conjunction with processor(s)412, memory416, transceiver402, etc., can receive, from the serving base station, the one or more transmitted downlink beams. For example, the serving base station can be a base station (e.g., base station102) serving one or more UEs (e.g., a UE104) or other downstream nodes via repeater204. For example, other downstream nodes may include one or more downstream repeaters that are downstream from repeater204—e.g., closer to a UE. The one or more transmitted downlink beams can include a beam previously selected by the repeater204for communicating with the serving base station (e.g., indicated via a control interface228). In another example, the one or more transmitted downlink beams can include multiple beams transmitted by the serving base station that are available for use in communicating with downstream devices, including repeater204, other repeaters, and/or one or more UEs, etc., each of which can be beamformed in a different spatial direction. In an example, the repeater204can be a class B repeater that can amplify and forward the transmitted downlink beam(s) to one or more UEs or downstream nodes using one or more associated transmit beams.

In method600, at Block604, one or more transmitted uplink beams can be received from a downstream node served by the serving base station. In an aspect, communicating component242, e.g., in conjunction with processor(s)412, memory416, transceiver402, etc., can receive, from the downstream node served by the serving base station, the one or more transmitted uplink beams. For example, the downstream node may include a UE, another repeater, etc., and the one or more transmitted uplink beams can be associated with a different direction, as described. The one or more transmitted uplink beams can include a beam previously selected by the downstream node or the repeater204for communicating with the downstream node. In another example, the one or more transmitted uplink beams can include multiple beams transmitted by the repeater204or the downstream node that are available for use in communicating by the repeater or the downstream node, each of which can be beamformed in a different spatial direction. In an example, the repeater204can be a class B repeater that can amplify and forward the transmitted uplink beam(s) to one or more base stations or upstream nodes using one or more associated transmit beams.

In method600, at Block606, one or more parameters related to determining a channel quality metric using at least the one or more transmitted downlink beams and the one or more transmitted uplink beams can be transmitted to the serving base station. In an aspect, parameter determining component442, e.g., in conjunction with processor(s)412, memory416, transceiver402, communicating component242, via control interface228, etc., can transmit, to the serving base station (e.g., base station102), the one or more parameters related to determining the channel quality metric using at least the one or more transmitted downlink beams and the one or more transmitted uplink beams. For example, the one or more parameters may include internal parameters of the repeater204, such as RF parameters of the RF front end488of the repeater204or other parameters that can be used to determined channel quality. For example, the one or more parameters may include a noise figure (NF), a coupling metric, a maximum power output, a switching latency for switching a transceiver (e.g., transceiver402) from transmit to receive or from receive to transmit, a switching latency for switching a transceiver between uplink and downlink communication direction, a latency to steer a transmit or receive beam at the transceiver, or a power gain of the radio at the repeater204, and/or the like. For example, parameter determining component442can determine one or more of these parameters based on measuring related conditions of the repeater204, querying a tracking component (not shown) that can track such parameters of the repeater204based on a history of communications, etc. In another example, the one or more parameters can include a measured or estimated channel quality metric over one or more of the link between the repeater204and the base station102(or other upstream node) or the link between the repeater204and the UE104(or other downstream node). In an example, these channel quality metrics can be measured based on the associated transmit beams and may be measured for one or more transmit beams (e.g., to facilitate determining a desirable combination of beams to use).

In method600, optionally at Block608, a downlink signal measurement can be measured for at least one downlink beam of the one or more transmitted downlink beams. In an aspect, parameter determining component442, e.g., in conjunction with processor(s)412, memory416, transceiver402, communicating component242, etc., can measure, for at least one downlink beam of the one or more transmitted downlink beams, the downlink signal measurement. For example, parameter determining component442can measure the channel quality metric of the one or more transmitted downlink beams received at Block602. For example, parameter determining component442can measure the channel quality metric of the transmitted downlink beam selected for communications between the serving base station of the UE and repeater204. In an example, parameter determining component442can measure the channel quality metric of the one or more transmitted downlink beams as a raw measurement, such as SNR, SINR, RSRP, reference signal received quality (RSRQ), etc., or other measurements, such as channel quality indicator (CQI), precoding matric indicator (PMI), load indicator (LI), rank indicator (RI), etc. Parameter determining component442may, for example, report the measured channel quality metric to the serving base station as part of transmitting the one or more parameters to the serving base station (e.g., at Block606). For example, parameter determining component442may report the measured channel quality metric for a beam selected for communications between the serving base station and the repeater204or for multiple beams transmitted by the serving base station as part of a beam management or training procedure.

In method600, optionally at Block610, an uplink signal measurement can be measured for at least one uplink beam of the one or more transmitted uplink beams. In an aspect, parameter determining component442, e.g., in conjunction with processor(s)412, memory416, transceiver402, communicating component242, etc., can measure, for at least one uplink beam of the one or more transmitted uplink beams, the uplink signal measurement. For example, parameter determining component442can measure the channel quality metric of the one or more transmitted uplink beams received at Block604. For example, parameter determining component442can measure the channel quality metric of the transmitted uplink beam selected for communications between the UE served by the serving base station and repeater204. In an example, parameter determining component442can measure the channel quality metric of the one or more transmitted uplink beams as a raw measurement, such as SNR, SINR, RSRP, RSRQ, etc., or other measurements, such as CQI, PMI, LI, RI, etc. Parameter determining component442may, for example, report the measured channel quality metric to the serving base station as part of transmitting the one or more parameters to the serving base station (e.g., at Block606). For example, parameter determining component442may report the measured channel quality metric for a beam selected for communications between the UE and the repeater204or for multiple beams transmitted by the UE as part of a beam management or training procedure, which repeater204and/or serving base station102may initiate for the UE.

In method600, optionally at Block612, a channel quality metric can be estimated based on the downlink signal measurement and the uplink signal measurement. In an aspect, parameter determining component442, e.g., in conjunction with processor(s)412, memory416, transceiver402, communicating component242, etc., can estimate the channel quality metric based on the downlink signal measurement and the uplink signal measurement. For example, parameter determining component442can determine an end-to-end channel quality metric (e.g., end-to-end SNR) based on the channel quality metric measured for the at least one transmitted downlink beam (e.g., measured at Block608) and the at least one transmitted uplink beam (e.g., measured at Block610). In addition, in an example, parameter determining component442can estimate the channel quality metric based also on internal parameters of the repeater204, as described. Thus, in an example, parameter determining component442can add the measured channel quality metrics and/or the internal parameters. In an example, parameter determining component442can transmit the estimated channel quality metric in transmitting the one or more parameters to the serving base station (e.g., at Block606). In one example, parameter determining component442can estimate the channel quality metric for various pairs of uplink/downlink beams, and may report the multiple channel quality metrics to the serving base station and/or the UE for determining which beams to use.

In an example, in method600, optionally at Block614, the downstream node can be instructed to transmit the one or more transmitted uplink beams. In an aspect, communicating component242, e.g., in conjunction with processor(s)412, memory416, transceiver402, etc., can instruct the downstream node to transmit the one or more transmitted uplink beams. For example, communicating component242can transmit an instruction to the downstream node to transmit the one or more transmitted uplink beams as part of a beam management or training procedure (e.g., an instruction to transmit all available beams), to facilitate determining a desirable beam for communicating with the downstream node (e.g., a UE). In another example, communicating component242can transmit beams that the UE can evaluate and determine which beam to select for communicating with the repeater204. The UE can indicate this beam to the repeater204, and the repeater can receive the one or more transmitted uplink beams at Block604based on the selection. In one example, communicating component242can transmit the instruction as repeating the instruction from an upstream node (e.g., a serving) base station to be transmitted to the downstream node (e.g., the served UE). In yet another example, the upstream node can transmit the instruction directly to the downstream node without involving the repeater204.

In an example, in method600, optionally at Block616, a measurement configuration indicating information for measuring at least one of the one or more transmitted downlink beams or the one or more transmitted uplink beams can be received. In an aspect, communicating component242, e.g., in conjunction with processor(s)412, memory416, transceiver402, etc., can receive the measurement configuration indicating information for measuring at least one of the one or more transmitted downlink beams or the one or more transmitted uplink beams. For example, communicating component242can receive the measurement configuration from the serving base station (e.g., over control interface228), etc. The measurement configuration can indicate parameters for the repeater204to instruct the downstream node to transmit the one or more transmitted uplink beams (e.g., at Block614). In another example, the measurement configuration can indicate parameters for the repeater to determine when and/or what metrics to measure of the one or more transmitted downlink beams and/or uplink beams, and parameter determining component442can accordingly measure the channel quality metric of the one or more transmitted downlink beams and/or uplink beams for reporting to the serving base station.

In an example, in method600, optionally at Block616, a reporting configuration, indicating at least one of the one or more parameters to transmit or a time during which to transmit the one or more parameters, can be received. In an aspect, communicating component242, e.g., in conjunction with processor(s)412, memory416, transceiver402, etc., can receive the reporting configuration indicating the at least one of the one or more parameters to transmit or the time during which to transmit the one or more parameters. For example, the reporting configuration can indicate whether the repeater204is to report internal parameters, estimated channel quality metrics of various links, a computed value based on the internal parameters, estimated channel qualities, etc., and/or the like. In addition, for example, the reporting configuration may indicate a time, periodicity, event or other trigger(s) for reporting the one or more parameters, and transmitting the one or more parameters at Block606may be based on the reporting configuration.

FIG.7illustrates a flow chart of an example of a method700for scheduling communications based on received information related to determining a channel quality metric. In an example, a base station102can perform one or more of the functions described in method700using one or more of the components described inFIGS.2and5.

In method700, at Block702, one or more transmitted downlink beams can be transmitted. In an aspect, scheduling component246, e.g., in conjunction with processor(s)512, memory516, transceiver502, etc., can transmit the one or more downlink beams. For example, the base station102can be serving one or more UEs (e.g., a UE104) or other downstream nodes via repeater204. For example, other downstream nodes may include one or more downstream repeaters that are downstream from repeater204—e.g., closer to a UE. The one or more transmitted downlink beams can include a beam previously selected by the repeater204for communicating with the serving base station102(e.g., indicated via a control interface228). In another example, the one or more transmitted downlink beams can include multiple beams transmitted by the serving base station102that are available for use in communicating with downstream devices, including repeater204, other repeaters, and/or one or more UEs, etc., each of which can be beamformed in a different spatial direction.

In method700, at Block704, one or more parameters related to determining a channel quality metric using at least one downlink beam of the one or more transmitted downlink beams and at least one uplink beams of one or more transmitted uplink beams can be received. In an aspect, parameter processing component542, e.g., in conjunction with processor(s)512, memory516, transceiver502, scheduling component246, etc., can receive, from the repeater, the one or more parameters related to determining the channel quality metric using at least one downlink beam of the one or more transmitted downlink beams and at least one uplink beam of the one or more transmitted uplink beams. For example, the one or more parameters may include internal parameters of the repeater204, channel quality metrics measured of the at least one uplink beam and/or the at least one downlink beam at the repeater204(e.g., raw measurements, such as SNR, SINR, RSRP, RSRQ, etc., or other measurements, such as CQI, PMI, LI, RI, etc.), an estimated channel quality metric computed based on channel quality metrics measured of the at least one uplink beam and/or the at least one downlink beam at the repeater204, the internal parameters of the repeater204, and/or the like, as described. Moreover, the one or more parameters can relate to selected beams and/or to multiple available beams to facilitate determining a desirable beam pair to use for communicating from the base station to the UE (via the repeater) and/or from the UE to the base station (via the repeater), etc.

In method700, optionally at Block706, the channel quality metric can be determined based at least in part on the one or more parameters. In an aspect, quality estimating component546, e.g., in conjunction with processor(s)512, memory516, transceiver502, scheduling component246, etc., can determine, based at least in part on the one or more parameters, the channel quality metric. For example, quality estimating component546may determine the channel quality metric as received as one or more of the parameters. In another example, quality estimating component546can estimate the channel quality metric based on the one or more received parameters, such as based on received internal parameters of the repeater204, which can be added to or otherwise used to modify measurements related to beams that can be measured by the base station102, UE104served by the base station (and reported back through the repeater204), etc. In yet another example, quality estimating component546can estimate the channel quality metric based on channel quality measurements for the at least one uplink beam and/or the at least one downlink beam, received from the repeater204(e.g., as measured by the repeater204, as described above).

In method700, optionally at Block708, a configuration for communicating with the downstream node can be determined based at least in part on the channel quality metric. In an aspect, scheduling component246, e.g., in conjunction with processor(s)512, memory516, transceiver502, etc., can determine, based at least in part on the channel quality metric, the configuration for communicating with the downstream node. In one example, scheduling component246can determine resource for scheduling the downstream node (e.g., the UE) via the repeater204based on the channel quality metric. For example, based on the channel quality metric, scheduling component246can determine a transmit power, a receive power, a data rate, a modulation and coding scheme (MCS), an antenna rank, or resources for communicating with the downstream node. In another example, scheduling component246can determine, based on the channel quality metric, a transmit beam and/or a receive beam to use in communicating with the downstream node (e.g., the UE) via the repeater204. As described, for example, the one or more parameters received from the repeater204may include channel metrics related to multiple beams and/or beam combinations (e.g., combinations of beams between the base station102and repeater204and between the repeater204and the downstream node).

For example, scheduling component246may accordingly select a transmit and/or receive beam based on determining which beams and/or beam combinations have desirable channel quality metrics. In an example, scheduling component246can select, based on channel quality metrics, whether to serve the downstream node (e.g., UE) directly or via the repeater204. For example, where the base station102serves the downstream node (e.g., UE) directly (e.g., without employing a repeater), scheduling component246can select the transmit beam for transmitting downlink communications to the downstream node, the receive beam for the downstream node to use in receiving downlink communications from the base station102, the receive beam for receiving uplink communications from the downstream node, and/or the transmit beam for the downstream node to use in transmitting uplink communications to the base station102. Where scheduling component246selects beams for the downstream node, it can transmit information regarding the selected beams to the downstream node. For example, where the base station102serves the downstream node via a repeater204, scheduling component246can also select the receive beam at the repeater204corresponding to the transmit beam at the base station102for receiving downlink communications transmitted by the base station102and can select the transmit beam at the repeater204corresponding to the receive beam at the downstream node for the repeater204to use in transmitting downlink communications from the base station102to the downstream node. Similarly, in this example where the base station102serves the downstream node via a repeater204, scheduling component246can also select the transmit beam at the repeater204corresponding to the receive beam at the base station102for transmitting uplink communications to the base station102and can select the receive beam at the repeater204corresponding to the transmit beam at the downstream node for the repeater204to use in receiving uplink communications from the downstream node. Where scheduling component246selects beams for the repeater204, it can transmit information regarding the selected beams to the repeater, as described herein.

In method700, at Block710, the downstream node can be communicated with via the repeater and based on the configuration. In an aspect, scheduling component246, e.g., in conjunction with processor(s)512, memory516, transceiver502, etc., can communicate, based on the configuration, with the downstream node via the repeater. For example, scheduling component246can schedule resources for communications and/or transmit (or configure transmission of) the communications based on the determined MCS, antenna rank, transmit power, receive power, data rate, etc. In another example, scheduling component246can communicate based on the determined transmit and/or receive beams, where determined based on parameters related from the repeater204, as described above. In addition, as described above, scheduling component246can determine whether to communicate with the downstream node (e.g., UE104) directly and/or via one or more repeaters204, where the determination may be based on the channel quality metrics.

In an example, in method700, optionally at Block712, a measurement configuration indicating information for measuring at least one of the one or more transmitted downlink beams or the one or more transmitted uplink beams can be transmitted. In an aspect, scheduling component246, e.g., in conjunction with processor(s)512, memory516, transceiver502, etc., can transmit the measurement configuration indicating information for measuring at least one of the one or more transmitted downlink beams or the one or more transmitted uplink beams. For example, scheduling component246can transmit the measurement configuration to the repeater204. The measurement configuration can indicate parameters for the repeater204to instruct the downstream node to transmit the one or more transmitted uplink beams, in one example. In another example, the measurement configuration can indicate parameters for the repeater to determine when and/or what metrics to measure of the one or more transmitted downlink beams and/or uplink beams.

In an example, in method700, optionally at Block714, a reporting configuration, indicating at least one of the one or more parameters to transmit or a time during which to transmit the one or more parameters, can be transmit. In an aspect, scheduling component246, e.g., in conjunction with processor(s)512, memory516, transceiver502, etc., can transmit the reporting configuration indicating the at least one of the one or more parameters to transmit or the time during which to transmit the one or more parameters. For example, the reporting configuration can indicate whether the repeater204is to report internal parameters, estimated channel quality metrics of various links, a computed value based on the internal parameters, estimated channel qualities, etc., and/or the like. In addition, for example, the reporting configuration may indicate a time, periodicity, event or other trigger(s) for reporting the one or more parameters, and receiving the one or more parameters at Block704may be based on the reporting configuration.

In the examples described herein, scheduling can be performed by the base station (e.g., gNB). A Class-B repeater can be used that can be layer 1 (L1)-repeaters where scheduling can be a layer 2 (L2)-functionality, and the Class-B repeater can support some level of control, as described. The scheduler (e.g., of the base station102) can seek to optimize some objective over the served UEs (for e.g. geometric mean of UL/DL rates achieved at the UEs, QoS requirements of different UE services, etc.). In this example, the gNB can determine the end-to-end SNRs in order to determine what MCS to schedule on each child link. In an example, the base station and/or UE can perform the end-to-end measurements (e.g., where the UE can report measurements to the base station). End-to-end SNR can also be a function of internal parameters of the intermediate repeaters and the UE. Advantages of scheduling coordination in multi-hop communication, as described herein, includes intermediate repeaters supporting double communication with parent (B S/repeater) and child (repeater/UE) so can perform measurements on the two links. In addition, intermediate repeaters may have better estimate of its internal parameters (NF, coupling, power gain, etc.).

In addition, for example, the repeater may perform measurements on multiple parent and child beams, as described, and the measurement configuration can be determined by the control node/base station. The repeater may send to the base station raw measurement reports for the parent and/or child links per beam, estimate of the parent-repeater-child SNR per beam, raw internal parameters that affect the end-to-end SNR, and/or the like. The information sharing may be for both UL and DL scheduling. Based on the reported information, the base station can schedule an appropriate MCS or other parameters per UE, as described above.

FIG.8is a block diagram of a MIMO communication system800including a base station102and a repeater204(or a UE or other downstream node). The MIMO communication system800may illustrate aspects of the wireless communication access network100described with reference toFIG.1. The base station102may be an example of aspects of the base station102described with reference toFIG.1. The base station102may be equipped with antennas834and835, and the repeater204may be equipped with antennas852and853. In the MIMO communication system800, the base station102may be able to send data over multiple communication links at the same time. Each communication link may be called a “layer” and the “rank” of the communication link may indicate the number of layers used for communication. For example, in a 2×2 MIMO communication system where base station102transmits two “layers,” the rank of the communication link between the base station102and the repeater204is two.

At the base station102, a transmit (Tx) processor820may receive data from a data source. The transmit processor820may process the data. The transmit processor820may also generate control symbols or reference symbols. A transmit MIMO processor830may perform spatial processing (e.g., precoding) on data symbols, control symbols, or reference symbols, if applicable, and may provide output symbol streams to the transmit modulator/demodulators832and833. Each modulator/demodulator832through833may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator/demodulator832through833may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal. In one example, DL signals from modulator/demodulators832and833may be transmitted via the antennas834and835, respectively.

The repeater204may be an example of aspects of the repeaters204described with reference toFIGS.1-3, etc. At the repeater204, the repeater antennas852and853may receive the DL signals from the base station102and may provide the received signals to the modulator/demodulators854and855, respectively. Each modulator/demodulator854through855may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each modulator/demodulator854through855may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector856may obtain received symbols from the modulator/demodulators854and855, perform MIMO detection on the received symbols, if applicable, and provide detected symbols. A receive (Rx) processor858may process (e.g., demodulate, deinterleave, and decode) the detected symbols, providing decoded data for the repeater204to a data output, and provide decoded control information to a processor880, or memory882.

The processor880may in some cases execute stored instructions to instantiate a communicating component242(see e.g.,FIGS.2and4) for reporting parameters and/or forwarding communications.

On the uplink (UL), at the repeater204, a transmit processor864may receive and process data from a data source. The transmit processor864may also generate reference symbols for a reference signal. The symbols from the transmit processor864may be precoded by a transmit MIMO processor866if applicable, further processed by the modulator/demodulators854and855(e.g., for SC-FDMA, etc.), and be transmitted to the base station102in accordance with the communication parameters received from the base station102. At the base station102, the UL signals from the repeater204may be received by the antennas834and835, processed by the modulator/demodulators832and833, detected by a MIMO detector836if applicable, and further processed by a receive processor838. The receive processor838may provide decoded data to a data output and to the processor840or memory842.

The processor840may in some cases execute stored instructions to instantiate a scheduling component246(see e.g.,FIGS.2and5) for configuring a UE with communication resource based on information received from a repeater.

The components of the repeater204may, individually or collectively, be implemented with one or more ASICs adapted to perform some or all of the applicable functions in hardware. Each of the noted modules may be a means for performing one or more functions related to operation of the MIMO communication system800. Similarly, the components of the base station102may, individually or collectively, be implemented with one or more ASICs adapted to perform some or all of the applicable functions in hardware. Each of the noted components may be a means for performing one or more functions related to operation of the MIMO communication system800.

In the following, an overview of further examples is provided:

1. A method for wireless communication, comprising:

receiving, at a repeater and from a serving base station, one or more transmitted downlink beams;

receiving, at the repeater and from a downstream node served by the serving base station, one or more transmitted uplink beams; and

transmitting, to the serving base station, one or more parameters related to determining a channel quality metric using at least the one or more transmitted downlink beams and the one or more transmitted uplink beams.

2. The method of example 1, further comprising:

measuring, for at least one downlink beam of the one or more transmitted downlink beams, a downlink signal measurement; and

measuring, for at least one uplink beam of the one or more transmitted uplink beams, an uplink signal measurement,

wherein transmitting the one or more parameters comprises transmitting, to the serving base station, raw measurements of the downlink signal measurement and the uplink signal measurement.

3. The method of example 2, further comprising estimating, based on the downlink signal measurement and the uplink signal measurement, an estimated channel quality metric for a beam combination including the at least one downlink beam and the at least one uplink beam, wherein transmitting the one or more parameters comprises transmitting, to the serving base station, the estimated channel quality metric for the beam combination.

4. The method of any of examples 1 to 3, wherein the one or more parameters include radio frequency parameters of a radio at the repeater.

5. The method of example 4, wherein transmitting the one or more parameters comprises transmitting, to the serving base station, at least one of a noise figure (NF), a coupling metric, a maximum power output, a switching latency for switching a transceiver from transmit to receive or from receive to transmit, a switching latency for switching the transceiver between uplink and downlink communication direction, a latency to steer a transmit or receive beam at the transceiver, or a power gain of the radio at the repeater.

6. The method of any of examples 1 to 5, further comprising receiving, from the serving base station, a measurement configuration indicating information for measuring at least one of the one or more transmitted downlink beams or the one or more transmitted uplink beams.

7. The method of example 6, further comprising instructing, based on the measurement configuration, the downstream node to transmit the multiple transmitted uplink beams.

8. The method of any of examples 1 to 7, further comprising receiving, from the serving base station, a reporting configuration indicating at least one of the one or more parameters to transmit or a time during which to transmit the one or more parameters, wherein transmitting the one or more parameters is based on the reporting configuration.

9. A method for wireless communication, comprising:

transmitting, by a serving base station, one or more transmitted downlink beams;

receiving, from a repeater, one or more parameters related to determining a channel quality metric using at least one downlink beam of the one or more transmitted downlink beams and at least one uplink beam of one or more transmitted uplink beams transmitted by a downstream node that is served by the serving base station;

determining, based at least in part on the one or more parameters, the channel quality metric;

determining, based at least in part on the channel quality metric, a configuration for communicating with the downstream node; and

communicating, based on the configuration, with the downstream node via the repeater.

10. The method of example 9, wherein determining the configuration includes determining at least one of a transmit beam, a receive beam, a transmit power, a receive power, a data rate, a modulation and coding scheme (MCS), an antenna rank, or resources for communicating with the downstream node.

11. The method of any of examples 9 or 10, wherein the one or more parameters correspond to a downlink signal measurement of the at least one downlink beam and an uplink signal measurement of the at least one uplink beam.

12. The method of example 11, wherein the one or more parameters include raw measurements of the downlink signal measurement and the uplink signal measurement.

13. The method of example 12, wherein the one or more parameters include an estimated channel quality metric for a beam combination including the at least one downlink beam and the at least one uplink beam, wherein the estimated channel quality metric corresponds to the downlink signal measurement and the uplink signal measurement.

14. The method of any of examples 9 to 13, wherein the one or more parameters include radio frequency parameters of a radio at the repeater.

15. The method of example 14, wherein the one or more parameters include at least one of a noise figure (NF), a coupling metric, a maximum power output, a switching latency for switching a transceiver from transmit to receive or from receive to transmit, a switching latency for switching the transceiver between uplink and downlink communication direction, a latency to steer a transmit or receive beam at the transceiver, or a power gain of a radio at the repeater.

16. The method of any of examples 9 to 15, further comprising transmitting, to the repeater, a measurement configuration indicating information for measuring at least one of the multiple transmitted downlink beams or the one or more transmitted uplink beams.

17. The method of any of examples 9 to 16, further comprising transmitting, to the repeater, a reporting configuration indicating at least one of the one or more parameters to be received or a time during which the one or more parameters are to be received, wherein receiving the one or more parameters is based on the reporting configuration.

18. The method of any of examples 9 to 17, wherein determining the configuration include determining a modulation and coding scheme (MCS) for transmitting communications, and wherein transmitting the communications comprises scheduling the downstream node for uplink or downlink communications based on the MCS.

19. An apparatus for wireless communication, comprising:

a transceiver;

a memory configured to store instructions; and

one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:receive, from a serving base station, one or more transmitted downlink beams;receive, from a downstream node served by the serving base station, one or more transmitted uplink beams; andtransmit, to the serving base station, one or more parameters related to determining a channel quality metric using at least the one or more transmitted downlink beams and the one or more transmitted uplink beams.

20. The apparatus of example 19, wherein the one or more processors are further configured to:

measure, for at least one downlink beam of the one or more transmitted downlink beams, a downlink signal measurement; and

measure, for at least one uplink beam of the one or more transmitted uplink beams, an uplink signal measurement,

wherein the one or more processors are configured to transmit the one or more parameters to include raw measurements of the downlink signal measurement and the uplink signal measurement.

21. The apparatus of example 20, wherein the one or more processors are further configured to estimate, based on the downlink signal measurement and the uplink signal measurement, an estimated channel quality metric for a beam combination including the at least one downlink beam and the at least one uplink beam, wherein the one or more processors are configured to transmit the one or more parameters to include the estimated channel quality metric for the beam combination.

22. The apparatus of any of examples 19 to 21, wherein the one or more parameters include radio frequency parameters of a radio at the repeater.

23. The apparatus of example 22, wherein the one or more processors are configured to transmit the one or more parameters to include at least one of a noise figure (NF), a coupling metric, a maximum power output, a switching latency for switching a transceiver from transmit to receive or from receive to transmit, a switching latency for switching the transceiver between uplink and downlink communication direction, a latency to steer a transmit or receive beam at the transceiver, or a power gain of the radio at the repeater.

24. The apparatus of any of examples 19 to 23, wherein the one or more processors are further configured to receive, from the serving base station, a measurement configuration indicating information for measuring at least one of the one or more transmitted downlink beams or the one or more transmitted uplink beams.

25. The apparatus of example 24, wherein the one or more processors are further configured to instruct, based on the measurement configuration, the downstream node to transmit the multiple transmitted uplink beams.

26. The apparatus of any of examples 19 to 25, wherein the one or more processors are further configured to receive, from the serving base station, a reporting configuration indicating at least one of the one or more parameters to transmit or a time during which to transmit the one or more parameters, wherein the one or more processors are configured to transmit the one or more parameters based on the reporting configuration.

27. An apparatus for wireless communication, comprising:

a transceiver;

a memory configured to store instructions; and

one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to:transmit one or more transmitted downlink beams;receive, from a repeater, one or more parameters related to determining a channel quality metric using at least one downlink beam of the one or more transmitted downlink beams and at least one uplink beam of one or more transmitted uplink beams transmitted by a downstream node that is served by the serving base station;determine, based at least in part on the one or more parameters, the channel quality metric;determine, based at least in part on the channel quality metric, a configuration for communicating with the downstream node; andcommunicate, based on the configuration, with the downstream node via the repeater.

28. The apparatus of example 27, wherein the one or more processors are configured to determine the configuration based at least in part on determining at least one of a transmit beam, a receive beam, a transmit power, a receive power, a data rate, a modulation and coding scheme (MCS), an antenna rank, or resources for communicating with the downstream node.

29. The apparatus of any of examples 27 or 28, wherein the one or more parameters correspond to a downlink signal measurement of the at least one downlink beam and an uplink signal measurement of the at least one uplink beam.

30. The apparatus of example 29, wherein the one or more parameters include raw measurements of the downlink signal measurement and the uplink signal measurement.

31. An apparatus for wireless communication, comprising means for performing one or more of the methods of any of examples 1 to 18.

32. A computer-readable medium, comprising code executable by one or more processors for wireless communications, the code comprising code for performing one or more of the methods of any of examples 1 to 18.