Relay downlink channel sounding using sounding reference signals (SRS)

Abstract

Methods, systems, and devices are described for wireless communication. The described techniques provide a network entity that obtains, from a relay device, an indication of an uplink gain factor associated with uplink transmissions from a user equipment (UE). The network entity can select, in accordance with the uplink gain factor, a precoding matrix associated with downlink transmissions to the UE. The network entity can output, via the relay device, downlink signaling to the UE via the relay device in accordance with the precoding matrix, a channel rank, and a modulation and coding scheme (MCS) via the relay device.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. Patent Application No. 18 / 395,008, filed December 22, 2023, entitled “USING SOUNDING REFERENCE SIGNALS (SRS) FOR REPEATER DOWNLINK CHANNEL SOUNDING”, which is assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The following pertains to wireless communication, including repeater downlink channel probing using sounding reference signals (SRS). Background Technology

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These systems can 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, LTE-A Advanced (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 technologies such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal FDMA (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations, each supporting wireless communication of communication devices, which may be referred to as User Equipment (UE).

[0005] When the channel meets the threshold based on channel reciprocity, network entities can use a sounding reference signal (SRS) for downlink channel probing. In some cases, repeater devices may affect channel reciprocity. Summary of the Invention

[0006] The described technology relates to improved methods, systems, apparatuses, and devices for supporting repeater downlink channel probing using sounding reference signals (SRS). For example, the described technology provides a network entity that obtains from a repeater device an indication of an uplink gain factor associated with an uplink transmission from a user equipment (UE). The network entity can select a pre-decoding matrix associated with the downlink transmission to the UE based on the uplink gain factor. In some examples, the network entity outputs downlink signaling to the UE via the repeater device based on the pre-decoding matrix, channel rank, and modulation and decoding scheme (MCS). The network entity can select the channel rank and MCS based on the uplink gain factor, downlink gain factor, and pre-decoding matrix. In some cases, the downlink gain factor is based on one or more first SRSs associated with the UE and one or more second SRSs associated with the repeater device. Additionally or alternatively, the repeater device can output the downlink gain factor to the network entity.

[0007] A method for wireless communication by a network entity is described. The method may include: obtaining from a repeater device an indication of an uplink gain factor associated with an uplink transmission from a UE via the repeater device; and outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0008] A network entity for wireless communication is described. The network entity may include: one or more memories storing processor-executable code; and one or more processors coupled to the one or more memories. The one or more memories may be individually or jointly operable to execute code to enable the network entity to: obtain from a repeater device an indication of an uplink gain factor associated with an uplink transmission from a UE via the repeater device; and output downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0009] Another network entity for wireless communication is described. This network entity may include: components for obtaining from a repeater device an indication of an uplink gain factor associated with an uplink transmission from a UE via the repeater device; and components for outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0010] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by one or more processors to: obtain from a repeater device an indication of an uplink gain factor associated with an uplink transmission from a UE via the repeater device; and output downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0011] Some examples of the methods, network entities, and nontransitory computer-readable media described herein may also include operations, features, components, or instructions for obtaining one or more first SRS associated with a UE via a repeater device, and obtaining one or more second SRS associated with a repeater device, wherein the downlink gain factor may be based on one or more first SRS and one or more second SRS.

[0012] The methods, network entities, and some examples of nontransitory computer-readable media described herein may also include operations, features, components, or instructions for estimating the channel quality between a network entity and a repeater device based on one or more second SRSs, wherein the downlink gain factor may be further based on the estimated channel quality.

[0013] The methods, network entities, and some examples of nontransitory computer-readable media described herein may also include operations, features, components, or instructions for selecting a pre-decoding matrix that may be further based on a downlink gain factor.

[0014] The methods, network entities, and some examples of nontransitory computer-readable media described herein may also include operations, features, components, or instructions for selecting the channel rank and MCS based on an updated downlink gain factor based on a pre-decoded matrix.

[0015] The methods, network entities, and some examples of nontransient computer-readable media described herein may also include operations, features, components, or instructions for selecting the channel rank and MCS based on an updated pre-decoding matrix, which may be selected based on a downlink gain factor.

[0016] Some examples of the methods, network entities, and nontransitory computer-readable media described herein may also include operations, features, components, or instructions for: outputting one or more reference signals to a repeater device; and obtaining an indication of a downlink gain factor from the repeater device based on the output of one or more reference signals.

[0017] In some examples of the methods, network entities, and non-transitory computer-readable media described herein, one or more reference signals may be output according to a pre-decoded matrix.

[0018] In some examples of the methods, network entities, and nontransitory computer-readable media described herein, the relationship between the uplink gain factor and the downlink gain factor can be based on the product of a first value and the identity matrix.

[0019] In some examples of the methods, network entities, and non-transitory computer-readable media described in this paper, the first value changes over time.

[0020] A method for wireless communication by a repeater device is described. The method may include: outputting an indication to a network entity of an uplink gain factor associated with an uplink transmission from a UE; obtaining downlink signaling based on the channel rank and MCS corresponding to the uplink gain factor and downlink gain factor; and forwarding the downlink signaling to the UE.

[0021] A repeater device for wireless communication is described. The repeater device may include: one or more memories storing processor-executable code; and one or more processors coupled to the memories. The one or more processors may operate individually or jointly to execute code to cause the repeater device to: output an indication to a network entity of an uplink gain factor associated with an uplink transmission from a UE; obtain downlink signaling based on the channel rank and MCS corresponding to the uplink gain factor and downlink gain factor; and forward the downlink signaling to the UE.

[0022] Another repeater device for wireless communication is described. This repeater device may include: components for outputting to a network entity an indication of an uplink gain factor associated with an uplink transmission from a UE; components for obtaining downlink signaling based on the channel rank and MCS corresponding to the uplink gain factor and downlink gain factor; and components for forwarding the downlink signaling to the UE.

[0023] A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by one or more processors to: output an indication to a network entity of an uplink gain factor associated with an uplink transmission from a UE; obtain downlink signaling based on the channel rank and MCS corresponding to the uplink gain factor and downlink gain factor; and forward the downlink signaling to the UE.

[0024] Some examples of the methods, repeater devices, and nontransitory computer-readable media described herein may also include operations, features, components, or instructions for: forwarding one or more first SRS associated with the UE to a network entity; and outputting one or more second SRS associated with the repeater device to a network entity, wherein downlink signaling may be based on one or more first SRS and one or more second SRS.

[0025] Some examples of the methods, repeater devices, and nontransitory computer-readable media described herein may also include operations, features, components, or instructions for: obtaining one or more downlink reference signals; and outputting an indication of a downlink gain factor to a network entity, wherein the downlink gain factor may be based on one or more downlink reference signals, and wherein downlink signaling may be based on the downlink gain factor.

[0026] In some examples of the methods, repeater devices, and nontransitory computer-readable media described herein, the downlink gain factor may be based on interference associated with one or more wireless devices.

[0027] In some examples of the methods, repeater devices, and nontransitory computer-readable media described herein, the uplink gain factor and downlink gain factor each satisfy a corresponding threshold based on a first power quantity associated with each respective antenna in the antenna set of the repeater device or a second power quantity associated with the antenna set.

[0028] In some examples of the methods, repeater devices, and nontransitory computer-readable media described herein, the uplink gain factor and downlink gain factor each satisfy a corresponding threshold associated with channel reciprocity.

[0029] In some examples of the methods, repeater devices, and nontransitory computer-readable media described herein, the relationship between the uplink gain factor and the downlink gain factor may be based on the product of a first value and an identity matrix. In some examples of the methods, repeater devices, and nontransitory computer-readable media described herein, the first value varies over time. Attached Figure Description

[0030] Figure 1 and Figure 2 An example of a wireless communication system that supports repeater downlink channel probing using a probe reference signal (SRS) according to one or more aspects of this disclosure is shown.

[0031] Figure 3 and Figure 4 An example of a process flow for repeater downlink channel probing using SRS in support of one or more aspects of this disclosure is shown.

[0032] Figure 5 and Figure 6 A block diagram of an apparatus for supporting repeater downlink channel probing using SRS according to one or more aspects of this disclosure is shown.

[0033] Figure 7 A block diagram of a communication manager supporting repeater downlink channel probing using SRS, according to one or more aspects of this disclosure, is shown.

[0034] Figure 8 A diagram is shown of a system including an apparatus that supports repeater downlink channel probing using SRS, according to one or more aspects of this disclosure.

[0035] Figure 9 and Figure 10 A block diagram of an apparatus for supporting repeater downlink channel probing using SRS according to one or more aspects of this disclosure is shown.

[0036] Figure 11 A block diagram of a communication manager supporting repeater downlink channel probing using SRS, according to one or more aspects of this disclosure, is shown.

[0037] Figure 12 A diagram is shown of a system including an apparatus that supports repeater downlink channel probing using SRS, according to one or more aspects of this disclosure.

[0038] Figures 13 to 16 A flowchart illustrating a method for repeater downlink channel probing using SRS in support of one or more aspects of this disclosure is shown. Detailed Implementation

[0039] In some wireless communication systems, repeater devices amplify and forward transmissions between network entities and user equipment (UEs). Repeater devices receive and forward signals that may be affected by uplink and downlink gain factors. Repeater devices can tune the uplink and downlink gain factors to satisfy daily antenna power constraints or the total power constraint of all antennas of the repeater device, respectively. In some cases, the uplink and downlink gain factors may be unknown to the network entity.

[0040] In some examples, a network entity may measure a sounding reference signal (SRS) to determine the channel rank and modulation and decoding scheme (MCS) for transmissions to the UE. The network entity may select the channel rank and MCS based on the estimated channel quality of the link between the network entity and the UE. In some wireless communication systems (e.g., including repeater devices), the network entity may select the channel rank and MCS based on a first channel quality (e.g., a first hop) between the network entity and the repeater device and a second channel (e.g., a second hop) between the repeater and the UE. In some examples, the repeater device may tune the uplink gain factor and the downlink gain factor to maintain channel reciprocity between the first and second channels. The channel rank and MCS for downlink transmissions (e.g., based on SRS measurements) may be based on the channel reciprocity between the first and second channels. In some cases, channel reciprocity may be based on the relationship between the uplink gain factor and the downlink gain factor. However, network entities may not have access to information about the relationship between uplink and downlink gain factors, and therefore may not be able to calculate the channel rank and MCS based on these SRS without additional information related to the uplink and downlink gain factors at the repeater.

[0041] According to the techniques described herein, wireless communication systems can support repeater-based downlink channel sounding using SRS, based on information provided by a repeater device to assist network entities in selecting one or more of a pre-decoding matrix, rank, and MCS. For example, the repeater device can send an indication of an uplink gain factor to the network entity, allowing the network entity to select the channel rank and MCS based on the selected pre-decoding matrix, uplink gain factor, and downlink gain factor. In some examples, the repeater device can send an SRS associated with a first channel to the network entity, and the network entity can determine the downlink gain factor based on the uplink gain factor and the SRS associated with the first channel. Additionally or alternatively, the network entity can select a pre-decoding matrix based on the uplink gain factor indication and can send a downlink reference signal to the repeater device. For example, the repeater device can calculate the downlink gain factor based on the downlink reference signal and can send an indication of the downlink gain factor to the network entity. In some cases, the repeater device can calculate the downlink gain factor based on interference from other wireless devices.

[0042] The various aspects of this disclosure are first described in the context of a wireless communication system. The various aspects of this disclosure are further illustrated and described by way of process flow. The various aspects of this disclosure are further illustrated and described by way of apparatus diagrams, system diagrams, and flowcharts relating to repeater downlink channel probing using a sounding reference signal (SRS).

[0043] Figure 1 An example of a wireless communication system 100 supporting repeater downlink channel probing using SRS according to one or more aspects of this disclosure is shown. The wireless communication system 100 may include one or more network entities 105, 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, a New Radio (NR) network, or a network operating under other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

[0044] Network entity 105 may be distributed across a geographical area to form wireless communication system 100, and may include devices employing different forms or having different capabilities. In various examples, network entity 105 may be referred to as a network element, mobility element, radio access network (RAN) node, or network equipment, among other designations. In some examples, network entity 105 and UE 115 may wirelessly communicate via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, network entity 105 may support coverage area 110 (e.g., a geographical coverage area) within which UE 115 and network entity 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographical area within which network entity 105 and UE 115 may support the transmission of signals according to one or more radio access technologies (RATs).

[0045] UE 115 can be distributed throughout the coverage area 110 of wireless communication system 100, and each UE 115 can be stationary or mobile, or stationary and mobile at different times. UE 115 can be devices in different forms or with different capabilities. Figure 1 Examples of UE 115 are illustrated herein. The UE 115 described herein can be able to support communication with various types of devices, such as other UE 115s or network entities 105, such as Figure 1 As shown.

[0046] As described herein, nodes of the wireless communication system 100 (which may be referred to as network nodes or wireless nodes) may be network entity 105 (e.g., any network entity described herein), UE 115 (e.g., any UE described herein), network controller, apparatus, device, computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be UE 115. Alternatively, a node may be network entity 105. Furthermore, a first node may be configured to communicate with a second or third node. In one aspect of this example, the first node may be UE 115, the second node may be network entity 105, and the third node may be UE 115. In another aspect of this example, the first node may be UE 115, the second node may be network entity 105, and the third node may be network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different from these examples. Similarly, references to UE 115, network entity 105, device, equipment, computing system, etc., may include disclosures of UE 115, network entity 105, device, equipment, computing system, etc., as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that a first node is configured to receive information from a second node.

[0047] In some examples, network entity 105 may communicate with core network 130, communicate with each other, or both. For example, network entity 105 may communicate with core network 130 via one or more backhaul communication links 120 (e.g., according to S1, N2, N3, or other interface protocols). In some examples, network entities 105 may communicate with each other directly (e.g., directly between network entities 105) or indirectly (e.g., via core network 130) via backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols). In some examples, network entities 105 may communicate with each other via midhaul communication link 162 (e.g., according to midhaul interface protocol) or fronthaul communication link 168 (e.g., according to fronthaul interface protocol) or any combination thereof. Backhaul communication link 120, midhaul communication link 162, or fronthaul communication link 168 may be or include one or more wired links (e.g., electrical links, fiber optic links), one or more wireless links (e.g., radio links, wireless optical links), etc., or various combinations thereof. UE 115 can communicate with core network 130 via communication link 155.

[0048] One or more network entities in network entity 105 described herein may include or be referred to as base station 140 (e.g., transceiver base station, radio base station, NR base station, access point, radio transceiver, node B, eNodeB (eNB), next-generation node B or gigabit node B (any of which may be referred to as gNB), 5G NB, next-generation eNB (ng-eNB), home node B, home evolution node B, or other suitable terms). In some examples, network entity 105 (e.g., base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture that may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as base station 140).

[0049] In some examples, network entity 105 may be implemented in a decomposed architecture (e.g., a decomposed base station architecture, a decomposed RAN architecture) that can be configured to utilize protocol stacks physically or logically distributed across two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance), or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN)). For example, network entity 105 may include one or more of the following: a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN intelligent controller (RIC) 175 (e.g., a near real-time RIC, a non-real-time RIC), a service management and orchestration (SMO) 180 system, or any combination thereof. 170 may also be referred to as a radio headend, intelligent radio headend, remote radio headend (RRH), remote radio unit (RRU), or transmit / receive point (TRP). One or more components of network entity 105 in a decomposed RAN architecture may be co-located, or one or more components of network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 in a decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0050] The functional splitting among CU 160, DU 165, and RU 170 is flexible and can support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combination thereof) are performed at CU 160, DU 165, or RU 170. For example, a protocol stack functional splitting can be used between CU 160 and DU 165, allowing CU 160 to support one or more layers of the protocol stack, and DU 165 to support one or more different layers of the protocol stack. In some examples, CU 160 can host higher protocol layer (e.g., Layer 3 (L3), Layer 2 (L2)) functionalities and signaling (e.g., Radio Resource Control (RRC), Serving Data Adaptation Protocol (SDAP), Packet Data Convergence Protocol (PDCP)). CU 160 can connect to one or more DU 165 or RU 170, and one or more DU 165 or RU 170 can host lower protocol layers, such as Layer 1 (L1) (e.g., Physical (PHY) layer) or L2 (e.g., Radio Link Control (RLC) layer, Medium Access Control (MAC) layer) functionality and signaling, and each can be at least partially controlled by CU 160. Additionally or alternatively, a protocol stack functional split can be employed between DU 165 and RU 170, such that DU 165 can support one or more layers of the protocol stack, and RU 170 can support one or more different layers of the protocol stack. DU 165 can support one or more different cells (e.g., via one or more RU 170). In some cases, functional decomposition between CU 160 and DU 165, or between DU 165 and RU 170, can be performed within the protocol layer (e.g., some functions of the protocol layer can be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer can be performed by different of CU 160, DU 165, or RU 170). CU 160 can be further functionally decomposed into CU control plane (CU-CP) and CU user plane (CU-UP) functions. CU 160 can be connected to one or more DU 165 via midhaul communication link 162 (e.g., F1, F1-c, F1-u), and DU 165 can be connected to one or more RU 170 via fronthaul communication link 168 (e.g., open fronthaul (FH) interface). In some examples, the midhaul communication link 162 or the fronthaul communication link 168 may be implemented based on the interfaces (e.g., channels) between the layers of the protocol stack, which are supported by the corresponding network entities 105 communicating via such communication links.

[0051] In some wireless communication systems (e.g., wireless communication system 100), the infrastructure and spectrum resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, thereby providing an IAB network architecture (e.g., to core network 130). In some cases, in an IAB network, one or more network entities 105 (e.g., IAB node 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as donor entities or IAB donors. One or more DU 165s or one or more RU 170s may be partially controlled by one or more CU 160s associated with donor network entity 105 (e.g., donor base station 140). One or more donor network entities 105 (e.g., IAB donors) may communicate with one or more additional network entities 105 (e.g., IAB node 104) via supported access and backhaul links (e.g., backhaul communication link 120). IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a DU 165 of a coupled IAB donor. The IAB-MT may include a separate set of antennas for relaying communication with UE 115, or may share the same antennas (e.g., those of RU 170) for access to IAB node 104 via DU 165 of IAB node 104. (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, IAB node 104 may include a DU 165 that supports communication links with additional entities (e.g., IAB node 104, UE 115) within a relay chain or configuration (e.g., downstream) of the access network. In such cases, one or more components of the decomposed RAN architecture (e.g., one or more IAB nodes 104 or components of IAB node 104) may be configured to operate according to the techniques described herein.

[0052] In the context of applying the techniques described herein to a decomposed RAN architecture, one or more components of the decomposed RAN architecture can be configured to support repeater downlink channel probing using SRS as described herein. For example, some operations described as being performed by UE 115 or network entity 105 (e.g., base station 140) may additionally or alternatively be performed by one or more components of the decomposed RAN architecture (e.g., IAB node 104, DU 165, CU 160, RU 170, RIC 175, SMO 180).

[0053] UE 115 may include or be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or any other suitable term, wherein "device" may also be referred to as a cell, station, terminal, or client, etc. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine-type communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc.

[0054] The UE 115 described herein can communicate with various types of devices, such as other UEs 115 that may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 As shown.

[0055] UE 115 and network entity 105 can wirelessly communicate with each other via one or more communication links 125 (e.g., access links) using resources associated with one or more carriers. The term "carrier" can refer to a set of RF spectrum resources that defines the physical layer structure used to support communication link 125. For example, a carrier for communication link 125 may include a portion of the RF spectrum band (e.g., a bandwidth portion (BWP)) operating 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 coordinating carrier operation, user data, or other signaling. Wireless communication system 100 can support communication with UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, UE 115 can be configured using multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation can be used in conjunction with both frequency division duplex (FDD) component carriers and time division duplex (TDD) component carriers. Communication between network entity 105 and other devices can refer to communication between these devices and any part of network entity 105 (e.g., entity, sub-entity). For example, the terms “send,” “receive,” or “communicate” when referring to network entity 105 can refer to any part of the RAN’s network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) communicating with another device (e.g., directly or via one or more other network entities 105).

[0056] The signal waveform transmitted via a carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In a system employing MCM, a resource element may refer to a resource of one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be 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 decoding rate of the modulation scheme, or both), such that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high modulation scheme order may correspond to a relatively high communication rate. Wireless communication resources may refer to a combination of RF spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial resources may increase the data rate or data integrity used for communication with UE 115.

[0057] The time interval for network entity 105 or UE 115 can be expressed as a multiple of a basic time unit, such as the sampling period. seconds, of which It can represent the supported subcarrier spacing, and This can represent the supported Discrete Fourier Transform (DFT) size. The time interval of the communication resources can be organized according to radio frames, each with a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0058] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may (e.g., in the time domain) be divided into subframes, and each subframe may be further divided into a certain 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 certain number of symbol periods (e.g., depending on the length of the cyclic prefix appended to each symbol period). In some wireless communication systems 100, time slots may be further divided into multiple micro-time slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., The duration of a symbol period is associated with a (number) sampling period. The duration of a symbol period can depend on the subcarrier spacing or the operating frequency band.

[0059] A subframe, time slot, micro-time slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0060] Depending on the technology, carriers can be used to multiplex physical channels for communication. For example, one or more of Time Division Multiplexing (TDM), Frequency Division Multiplexing (FDM), or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels for signaling via a downlink carrier. The control region (e.g., control resource set (CORESET)) of the physical control channel can be defined by a set of symbol periods and can extend across the system bandwidth of the carrier or a subset of that bandwidth. One or more control regions (e.g., CORESET) can be configured for a set of UEs 115. For example, one or more UEs in UE 115 can monitor or search for control regions to obtain control information based on one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a concatenated manner. The aggregation level of control channel candidates can refer to the amount 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 set may include: a common search space set configured to transmit control information to multiple UEs 115, and a UE-specific search space set used to transmit control information to a specific UE 115.

[0061] In some examples, network entity 105 (e.g., base station 140, RU 170) may be mobile, and thus provide communication coverage to mobile coverage areas 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of network entities 105 use the same or different radio access technologies to provide coverage for various coverage areas 110.

[0062] Wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication, or various combinations thereof. For example, wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). UE 115 may be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communication may include private or group communication and may be supported by one or more services, such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general business applications. The terms “ultra-reliable,” “low-latency,” and “ultra-reliable low-latency” are used interchangeably herein.

[0063] In some examples, UE 115 may be configured to support direct communication with other UE 115s via device-to-device (D2D) communication link 135 (e.g., according to peer-to-peer (P2P), D2D, or sidelink protocols). In some examples, one or more UE 115s performing D2D communication in a group may be within the coverage area 110 of network entity 105 (e.g., base station 140, RU 170), which may support aspects of such D2D communication configured (e.g., scheduled by network entity 105). In some examples, one or more UE 115s in such a group may be outside the coverage area 110 of network entity 105, or may otherwise be unable or not configured to receive transmissions from network entity 105. In some examples, the group of UE 115s communicating via D2D communication may support a one-to-many (1:M) system, where each UE 115 transmits to each of the other UE 115s in the group. In some examples, network entity 105 may facilitate the scheduling of resources used for D2D communication. In other examples, D2D communication may be performed between UEs 115 without involving network entity 105.

[0064] Core network 130 provides user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and may include at least one control plane entity (e.g., a Mobility Management Entity (MME), 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), Packet Data Network (PDN) Gateway (P-GW), or User Plane Function (UPF)) for routing packets or interconnecting to external networks. The control plane entity manages non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by network entity 105 (e.g., base station 140) associated with core network 130. User IP packets can be delivered through user plane entities, which provide IP address allocation and other functions. User plane entities may connect to one or more network operator IP services 150. IP services 150 may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0065] Wireless communication system 100 can operate using one or more frequency bands in the range of 300 MHz to 300 GHz. Generally, the area from 300 MHz to 3 GHz is referred to as the Ultra High Frequency (UHF) band or decimeter band because the wavelength range is approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features (which may be referred to as clusters), but these waves are sufficient to penetrate structures so that macrocells can provide service to UE 115 located indoors. Compared to communication using smaller frequencies and longer wavelengths in the High Frequency (HF) or Very High Frequency (VHF) portions of the spectrum below 300 MHz, communication using UHF waves can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0066] Wireless communication system 100 may utilize licensed and unlicensed RF spectrum bands. For example, wireless communication system 100 may use unlicensed frequency bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band) to employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology. When operating with unlicensed RF spectrum bands, devices such as network entity 105 and UE 115 may employ carrier sensing for collision detection and avoidance. In some examples, operation using unlicensed frequency bands may be combined with component carriers operating with licensed frequency bands based on carrier aggregation configurations (e.g., LAA). Operation using unlicensed spectrum may include downlink transmission, uplink transmission, P2P transmission, or D2D transmission, etc.

[0067] Network entity 105 (e.g., base station 140, RU 170) or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of network entity 105 or UE 115 may be located within one or more antenna arrays or antenna panels, which can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly such as an antenna tower. In some examples, the antennas or antenna arrays associated with network entity 105 may be located at different geographical locations. Network entity 105 may include an antenna array having a collection of multiple rows and columns of antenna ports that network entity 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may include one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals transmitted via the antenna ports.

[0068] Beamforming (also known as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., network entity 105, UE 115) to shape or guide an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array such that some signals propagating along a specific orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to the signals transmitted via the antenna elements may include applying amplitude shifts, phase shifts, or both to the signals carried via the antenna elements associated with the device. The adjustments associated with each of these antenna elements may be defined by a beamforming weight set associated with a specific orientation (e.g., relative to the antenna array of the transmitting or receiving device or relative to some other orientation).

[0069] In some examples, network entity 105 may measure the received SRS for the channel between network entity 105 and UE 115 to select the channel rank and MCS. In some wireless communication systems, network entity 105 may select the channel rank and MCS based on the estimated channel quality of the link between network entity 105 and UE 115. For example, network entity 105 may determine a first ratio of the transmit power at network entity 105 to the number of transmit antennas at network entity 105, and a second ratio of the transmit power at UE 115 to the number of transmit antennas at UE 115. Network entity 105 may estimate the channel quality based on the received SRS and UL SRS power. In some cases, network entity 105 may perform singular value decomposition (SVD) of the channel quality to select the pre-decoding matrix. In such cases, network entity 105 may select the channel rank and MCS based on the pre-decoding matrix and the first ratio. In some cases, network entity 105 may determine the channel rank and MCS based on noise power (e.g., the transmit power at network entity 105 can be used to estimate the expected signal-to-noise ratio (SNR)).

[0070] In some wireless communication systems 100, repeater devices can amplify and forward transmissions between network entity 105 and UE 115. Repeater devices can receive and forward signals that undergo uplink and downlink gain factors. Repeater devices can tune the uplink and downlink gain factors to satisfy daily antenna power constraints or the total power constraint of all antennas of the repeater device, respectively. In some cases, the uplink and downlink gain factors may be unknown to network entity 105.

[0071] In some wireless communication systems 100, network entity 105 may select the channel rank and MCS based on a first channel (e.g., a first hop) between network entity 105 and a repeater device and a second channel (e.g., a second hop) between the repeater and UE 115. In some examples, the repeater device may tune uplink and downlink gain factors to maintain channel reciprocity between the first and second channels. Channel reciprocity allows network entity 105 to select the channel rank and MCS for downlink transmission (e.g., based on SRS measurements). However, in some other wireless communication systems, the network entity may not be able to select the channel rank and MCS without additional information associated with the uplink and downlink gain factors at the repeater device.

[0072] The wireless communication system 100 can support downlink channel sounding using SRS. For example, the repeater device can send an indication of the uplink gain factor to network entity 105, allowing network entity 105 to select the channel rank and MCS based on the selected pre-decoding matrix, the uplink gain factor, and the downlink gain factor. In some examples, the repeater device sends an SRS associated with a first channel to network entity 105, and network entity 105 determines the downlink gain factor based on the uplink gain factor and the SRS associated with the first channel. Additionally or alternatively, network entity 105 can select the pre-decoding matrix based on the uplink gain factor indication and send a downlink reference signal to the repeater device. For example, the repeater device calculates the downlink gain factor based on the downlink reference signal and sends an indication of the downlink gain factor to network entity 105. In some cases, the repeater device calculates the downlink gain factor based on interference from other wireless devices.

[0073] Figure 2 An example of a wireless communication system 200 supporting repeater downlink channel probing using SRS according to one or more aspects of this disclosure is shown. In some examples, the wireless communication system 200 may implement, or be implemented by, aspects of the wireless communication system 100. For example, the wireless communication system 200 may include one or more network entities 105 (e.g., network entity 105-a) and one or more UEs 115 (e.g., UE 115-a), which may be as described in reference Figure 1 Examples of the corresponding devices described. In some examples, network entity 105-a may send signaling to UE 115-a via repeater device 210. For example, network entity 105-a may send downlink signaling 225 to repeater device 210 via channel 205, and repeater device 210 may amplify downlink signaling 225 and forward it to UE 115-a via channel 215. Similarly, UE 115-a may send uplink signaling 220 to network entity 105-a. For example, UE 115-a may send uplink signaling 220 to repeater device 210 via channel 215, and repeater device 210 may amplify uplink signaling 220 and forward it to network entity 105-a.

[0074] Repeater device 210 facilitates wireless communication between various wireless devices (e.g., in multi-hop deployments). For example, repeater device 210 may receive and forward signaling (e.g., uplink signaling 220 and downlink signaling 225) between UE 115-a and network entity 105-a. Repeater device 210 may use one or more antennas 245 (e.g., one or more receive antennas) to receive one or more input signals 230 (e.g., one or more SRS), and may generate one or more output signals 240 (e.g., forwardable received SRS) for transmission to network entity 105-a via channel 205 using one or more antennas 245 (e.g., one or more transmit antennas). In some examples, repeater device 210 may apply a one-to-one amplification from antenna to output antenna. In some examples, repeater device 210 may apply a gain factor 235 to one or more output signals 240. The gain factor 235 of each of one or more antennas 245 can be set to satisfy a daily antenna power constraint or a total power constraint on all transmit antennas at repeater device 210 (e.g., one or more of antennas 245). Additionally or alternatively, repeater device 210 may receive one or more input signals 230 from UE 115-a, apply the gain factor 235, and transmit one or more output signals 240 to network entity 105-a via channel 205 (e.g., repeater device 210 may operate in the uplink direction, downlink direction, or both).

[0075] In some examples, the value of gain factor 235 may be based on whether the corresponding signal travels in the uplink or downlink direction (e.g., repeater device 210 may determine the uplink gain factor and the downlink gain factor). For example, the value of gain factor 235 for uplink signaling 220 may differ from that for downlink signaling 225. In some examples, the values ​​of gain factor 235 in the uplink and downlink may satisfy a power threshold based on the power of each antenna of repeater device 210, a power threshold based on the antenna set of repeater device 210 (e.g., all antennas of repeater device 210), or both. Additionally or alternatively, the values ​​of gain factor 235 in the uplink and the values ​​of gain factor 235 in the downlink may be defined as a diagonal matrix that may be applied to one or more antennas 245 at repeater device 210 (e.g., to increase the repeater transmit power).

[0076] In some examples, SRS can be used in conjunction with repeater device 210 for downlink channel sounding. In such examples, network entity 105-a (e.g., via channel 205) transmits downlink signaling 225. In some cases, repeater device 210 transmits downlink signaling 225 via (e.g., with channel quality) H1. Associated) Channel 205 receives downlink signaling 225 (e.g., a first reference signal). Repeater device 210 may apply gain factor 235 (e.g., downlink gain factor). G DL And via (e.g., with channel quality) H (Associated) Channel 215 forwards downlink signaling 225 to UE 115-a. In some examples, downlink transmission is affected by noise associated with channel 205 or channel 215 (e.g., noise). Z 1) The impact (e.g., noise based on interference from other wireless devices, physical barriers between network entity 105-a and UE 115-a, etc.). UE 115-a can receive downlink signals represented by Equation 1 below. Y DL .

[0077]

[0078] Equation 1

[0079] Refer to Equation 1, X DL This can indicate the transmission of the first reference signal in downlink signaling 225. P NB This can represent the transmission power at network entity 105-a, and Nt NB This can represent the number of transmitting antennas at network entity 105-a.

[0080] In some examples, UE 115-a sends uplink signaling 220 (e.g., a first reference signal, such as SRS). In some examples, UE 115-a may respond to receiving a downlink signal. Y DL To send uplink signaling 220. In some cases, repeater device 210 transmits it via (e.g., with channel quality) H 2. Associated) Channel 215 receives uplink signaling 220 (e.g., a first reference signal). Repeater device 210 may apply a gain factor 235 (e.g., an uplink gain factor). G UL And the uplink signaling 220 is forwarded to network entity 105-a via channel 205. In some examples, the uplink transmission is affected by noise associated with channel 205 or channel 215 (e.g., noise). Z 2) Impact. Network entity 105-a can receive uplink signals as represented by Equation 2 below. Y UL .

[0081]

[0082] Equation 2

[0083] Refer to Equation 2, X UL This can represent the transmission of the first reference signal in uplink signaling 220. P UE This can represent the power transmitted at UE115-a. Nt NB This can represent the number of transmit antennas at UE 115-a. It can represent the transpose of the quality of channel 205, and It can represent the transpose of the quality of channel 215.

[0084] In some examples, network entity 105-a can communicate with UE 115-a without repeater device 210. In these examples, network entity 105-a may have access to information regarding both the transmitted power and the number of transmit antennas at network entity 105-a and the number of transmit antennas at UE 115-a (e.g., and therefore may be able to determine the power used for transmitting). of and for of Based on the SRS and uplink SRS power received at network entity 105-a, network entity 105-a can estimate the channel. H Based on the estimated channel H Network entity 105-a executable channel H SVD for selecting pre-decoding matrix V For reference Figure 1 As described in more detail. Based on this, network entity 105-a may (e.g., according to...) The rank and MCS are determined. However, as described in this paper, such calculations may be more challenging due to the potential lack of access to relevant information by network entity 105-a, based on uplink gain factors, downlink gain factors, and multi-hop deployments introduced with the implementation of repeater device 210.

[0085] UE 115-a or network entity 105-a may identify the relationship between the uplink gain factor and the downlink gain factor. In some examples (e.g., to maintain channel reciprocity), the uplink gain factor may be equal to a factor of the transpose of the downlink gain factor. For example, repeater device 210 may set the uplink gain factor to be equal to the product of a value and an identity matrix. Additionally or alternatively, repeater device 210 may set the downlink gain factor to be equal to the product of a value and an identity matrix. In some cases, the values ​​for the uplink gain factor and the values ​​for the downlink gain factor are different and vary over time. As described herein, the terms uplink gain factor, downlink gain factor, or both may refer to the values ​​of the corresponding uplink and downlink gain factors, constants, values ​​multiplied by an identity matrix, or any combination thereof. In other words, as described herein, one or more devices may identify or send indications of an uplink gain factor, a downlink gain factor, or the relationship between the two, and such indications may include values ​​for the respective uplink and downlink gain factors, constants, values ​​multiplied by an identity matrix, etc.

[0086] In some examples, repeater device 210 calculates the downlink gain factor based on downlink signaling 225 (e.g., a first reference signal) received from network entity 105-a. In some cases, network entity 105-a selects the pre-decoding matrix to be applied to the signal (e.g., the pre-decoding matrix). V The repeater device 210 can receive downlink signaling 225 according to Equation 3 below.

[0087]

[0088] Equation 3

[0089] In some cases, network entity 105-a can be based on the quality of channel 205. H 1. Channel 215 quality H 2. Uplink gain factor G UL and transmission power (e.g., transmission power at network entity 105-a) P NB ) and the number of antennas (e.g., the number of antennas at network entity 105-a) Nt NB The pre-decoding matrix, MCS, and channel rank are selected by taking the square root of the ratio between these parameters. For example, network entity 105-a can have its value determined according to Equation 4. Y P (Network entity 105-a can select the pre-decoding matrix based on this value) V MCS and rank).

[0090]

[0091] Equation 4

[0092] However, network entity 105-a may have access to (e.g., as shown in Equation 2) the transpose of the quality of channel 205, the transpose of the quality of channel 215, and the uplink gain factor. In such cases, network entity 105-a may not be able to receive or determine information about the uplink gain factor without... G UL and Channel 205 quality H 1. Further information is needed to determine the pre-decoding matrix, MCS, or channel rank. Additionally, network entity 105-a may not be able to determine the pre-decoding matrix without selecting one. V Calculate the downlink gain factor under the following conditions G DL To estimate the expected SNR at UE 115-a. However, network entity 105-a may not be able to select the pre-decoding matrix without access to information about the downlink gain factor. V The techniques described herein can provide network entity 105-a with sufficient information (e.g., regarding the relationship between downlink and uplink gain factors) to effectively select the pre-decoded matrix for subsequent downlink transmission to UE 115-a via repeater device 210. V MCS and rank.

[0093] The wireless communication system 200 supports repeater downlink channel sounding using SRS, allowing network entity 105-a to select the pre-decoding matrix, MCS, and channel rank. In some examples, repeater device 210 feeds back the uplink gain factor to network entity 105-a. G UL In addition to the SRS sent by UE 115-a, repeater device 210 can also send SRS to network entity 105-a, which can estimate based on these SRS. H 1. For example, repeater device 210 may forward SRS received from UE 115-a in uplink signaling 220, may send uplink gain indication 250, and may send a second reference signal (e.g., additional SRS) to network entity 105-a. In such an example, uplink gain indication 250 indicates an uplink gain factor. G UL Furthermore, the second reference signal enables network entity 105-a to estimate the quality of channel 205. H 1. Network entity 105-a may select the MCS and channel rank (e.g., as reference) based on uplink gain indication 250 and a second reference signal. Figure 3(as further described).

[0094] For example, as referenced Figure 3 As further described, network entity 105-a may receive an uplink gain indication 250 from repeater device 210, an SRS (e.g., a first SRS) forwarded by repeater device 210 from UE 115-a, and an additional (e.g., a second) SRS sent by repeater device 210. Network entity 105-a may estimate H 1, and calculate G DL and pre-decoding matrix V Network entity 105-a can initialize the pre-decoding matrix. V Set to equal the identity matrix. Network entity 105-a can be based on... To calculate G DL ,in V It is an identity matrix. Network entity 105-a can be based on To compute the updated pre-decoding matrix V Then it can be based on To calculate the update G DL ,in V This is the updated pre-decoded matrix. Network entity 105-a can perform multiple iterations of this process, based on the most recently computed or updated... To update the pre-decoding matrix V And based on the most recently computed or updated pre-decoded matrix. V To recalculate .

[0095] Alternatively, repeater device 210 can feed back uplink gain to network entity 105-a. G UL Network entity 105-a can compute the pre-decoding matrix. V And can use the pre-decoding matrix V To send a downlink reference signal to repeater device 210. Repeater device 210 can calculate... G DL And the calculated G DL Feedback is sent to network entity 105-a. This is done while determining the pre-decoding matrix. V And received the G DLFollowing the instruction, network entity 105-a can determine the channel rank and MCS for subsequent downlink transmissions. For example, repeater device 210 can send uplink gain indication 250, receive a downlink reference signal, and send a downlink gain indication to network entity 105-a. In some examples, the downlink gain indication indicates the downlink gain factor. G DL And network entity 105-a is based on the received downlink gain indication (e.g., as referenced). Figure 4 (As further described) to select the MCS and channel rank.

[0096] For example, as referenced Figure 4 As described in more detail, network entity 105-a can receive an uplink gain indication 250 from repeater device 210. Network entity 105-a can calculate the pre-decoding matrix. V And can use the pre-decoding matrix V To send downlink reference signals to repeater device 210. For example, network entity 105-a can send the initial pre-decoding matrix. V Set to equal the identity matrix. Network entity 105-a can be based on... To calculate G DL ,in V It is an identity matrix. Network entity 105-a can be based on To compute the updated pre-decoding matrix V Based on the updated pre-decoding matrix V Network entity 105-a can send a downlink reference signal to repeater device 210. Repeater device 210 can calculate... G DL The updated value and the calculated G DL Feedback is sent to network entity 105-a. The update indicated by repeater device 210 to network entity 105-a... G DL It may be more accurate than the initial or previous calculation by network entity 105-a. G DL More accurate, because the calculation is performed at repeater device 210. G DL Interference from other nodes can be considered. This is relevant when determining the pre-decoding matrix. V And received the G DL Following the instruction, network entity 105-a can determine the channel rank and MCS used for subsequent downlink transmissions.

[0097] Figure 3An example of process flow 300 for repeater downlink channel probing using SRS, supported by one or more aspects of this disclosure, is shown. Process flow 300 can be described via references herein. Figure 1 and Figure 2 The described wireless communication system 100 or wireless communication system 200 may be executed by various aspects of process flow 300. For example, network entity 105-b, repeater device 210-a, and UE 115-b (which may be examples of network entity 105, UE 115, and repeater device 210 as described herein) may execute various aspects of process flow 300. In the following description of process flow 300, the operations performed by network entity 105-b, repeater device 210-a, and UE 115-b may be performed in a different order than shown. Some operations may be omitted from process flow 300, and other operations may be added to process flow 300. Furthermore, although some operations or signaling are shown to occur at different times for discussion purposes, these operations may occur simultaneously. In some examples, the following calculations performed by repeater device 210-a or network entity 105-b may include or be described as calculations, determinations, or selections performed by repeater device 210-a or network entity 105-b.

[0098] At 305, repeater device 210-a can calculate the uplink gain factor associated with the uplink transmission from UE 115-b. In some examples, at 310, repeater device 210-a can output (e.g., transmit) an indication of the uplink gain factor to network entity 105-b.

[0099] In some examples, at 315, repeater device 210-a receives one or more first SRSs from UE 115-b. In some examples, at 320, repeater device 210-a forwards one or more first SRSs to network entity 105-b. At 325, repeater device 210-a may output one or more second SRSs to network entity 105-b. In such examples, additional SRSs may be provided to network entity 105-b to assist in the calculation of downlink gain factors, the selection of pre-decoding matrices, or both.

[0100] In some examples, the network entity may iteratively compute the downlink gain factor, select a pre-decoding matrix, or both (e.g., at one or more of 330, 335, 340, and 345). For example, after receiving an indication of the uplink gain factor from repeater device 210-a (e.g., at 310), network entity 105-b may set an initial pre-decoding matrix (e.g., an identity matrix), compute an initial downlink gain factor based on that initial pre-decoding matrix, compute an updated pre-decoding matrix based on the computed downlink gain factor, and then compute an updated downlink gain factor based on that updated downlink gain factor (e.g., or any number of iterations may be performed to compute updated values ​​of the downlink gain factor or the pre-decoding matrix, or both). In some examples, network entity 105-b may set an initial value for the downlink gain factor (e.g., using an initial or default constant or a ratio between the uplink gain factor and the downlink gain factor), and use the initial downlink gain factor to compute the initial pre-decoding matrix. The initial pre-decoding matrix can be used to compute the updated downlink gain factor, which can be used to compute the updated pre-decoding matrix through any number of iterations.

[0101] In some examples, at point 330, network entity 105-b calculates the downlink gain factor based on one or more first SRSs, one or more second SRSs, or any combination thereof. Network entity 105-b may estimate the channel quality between network entity 105-b and repeater device 210-a based on one or more second SRSs. H 1. In some cases, network entity 105-b calculates the downlink gain factor based on the estimated channel quality. In some examples, network entity 105-b can use the pre-decoding matrix... V Set as an identity matrix, and use Equation 3 based on the estimated channel quality. H 1. Calculate the downlink gain factor G DL .

[0102] At 335, network entity 105-b may select a pre-decoding matrix associated with downlink transmission to UE 115-b via repeater device 210-a. For example, network entity 105-b may select the pre-decoding matrix based on an uplink gain factor (e.g., using Equation 4). In some cases, network entity 105-b selects the pre-decoding matrix based on calculating a downlink gain factor. For example, network entity 105-b may select the pre-decoding matrix based on calculating a downlink gain factor using Equation 3. In some examples, at 340, network entity 105-b calculates an updated downlink gain factor based on (e.g., using Equation 4) the selected pre-decoding matrix. For example, network entity 105-b may calculate the updated downlink gain factor in Equation 3 based on using the selected pre-decoding matrix.

[0103] Alternatively or additionally, at point 345, network entity 105-b may select the updated pre-decoding matrix based at least in part on the downlink gain factor. For example, network entity 105-b may use Equations 3 and 4 based on the most recently calculated or updated... To update the pre-decoded matrix V.

[0104] At position 350, network entity 105-b may select the channel rank and MCS based on the uplink gain factor, the downlink gain factor, the pre-decoding matrix, or any combination thereof. In some examples, network entity 105-b selects the channel rank and MCS based on the updated downlink gain factor. Additionally or alternatively, network entity 105-b may select the channel rank and MCS based on the updated pre-decoding matrix.

[0105] At position 355, network entity 105-b may output downlink signaling to UE 115-b based on the pre-decoded matrix, channel rank, and MCS. In some examples, at position 360, repeater device 210-a forwards downlink signaling to UE 115-b. In some cases, network entity 105-b outputs downlink signaling based on one or more first SRSs, one or more second SRSs, or both.

[0106] In some examples, the relationship between the uplink gain factor and the downlink gain factor is based on the product of a first value and the identity matrix. In some cases, the first value varies over time. Additionally or alternatively, the uplink gain factor and the downlink gain factor may each satisfy at least in part based on a first power quantity associated with each corresponding antenna in the antenna set of repeater device 210-a, a second power quantity associated with that antenna set, or a corresponding threshold of both. In some examples, the uplink gain factor and the downlink gain factor each satisfy a corresponding threshold associated with channel reciprocity. In some examples, as referenced... Figure 4As described in more detail, repeater device 210-a can send a downlink gain factor to network entity 105-b.

[0107] Figure 4 An example of a process flow 400 for repeater downlink channel probing using SRS, supported by one or more aspects of this disclosure, is shown. Process flow 400 can be described via reference herein. Figure 1 and Figure 2 The described wireless communication system 100 or wireless communication system 200 are executed by various aspects. For example, network entity 105-c, repeater device 210-b, and UE 115-c (which may be examples of network entity 105, UE 115, and repeater device 210 as described herein) may execute various aspects of process flow 400. In the following description of process flow 400, the operations performed by network entity 105-c, repeater device 210-b, and UE 115-c may be performed in a different order than shown. Some operations may be omitted from process flow 400, and other operations may be added to process flow 400. Furthermore, although some operations or signaling are shown to occur at different times for discussion purposes, these operations may occur simultaneously.

[0108] In some examples, the following calculations performed by repeater device 210-b or network entity 105-c may include or be described as calculations, determinations, or selections performed by repeater device 210-b or network entity 105-c.

[0109] At 405, repeater device 210-b can calculate the uplink gain factor associated with the uplink transmission from UE 115-c. In some examples, at 410, repeater device 210-a outputs (e.g., transmits) an indication of the uplink gain factor to network entity 105-c.

[0110] At position 415, network entity 105-c may select a pre-decoding matrix associated with downlink transmission to UE 115-c via repeater device 210-b. For example, network entity 105-c may select the pre-decoding matrix based on the uplink gain factor. In some cases, network entity 105-c may use the pre-decoding matrix... V The identity matrix is ​​set, and the estimated downlink gain factor is calculated based on Equation 3. Network entity 105-b can select the pre-decoding matrix based on the calculated estimated downlink gain factor and Equation 4. V In some examples, at 420, network entity 105-c outputs one or more reference signals to repeater device 210-b. Network entity 105-c may output one or more reference signals based on a pre-decoding matrix.

[0111] At 425, repeater device 210-b may calculate the downlink gain factor based on one or more reference signals. In some examples, repeater device 210-b calculates the downlink gain factor based on interference associated with one or more wireless devices (e.g., repeater device 210-b may reduce interference from one or more wireless devices). In some cases, at 430, repeater device 210-b outputs an indication of the downlink gain factor to network entity 105-c based on the downlink gain factor, one or more reference signals, or both.

[0112] In some examples, the relationship between the uplink gain factor and the downlink gain factor may be based on the product of a first value and the identity matrix. In some cases, the first value varies over time. Additionally or alternatively, the uplink gain factor and the downlink gain factor may each satisfy at least in part based on a first power quantity associated with each corresponding antenna in the antenna set of repeater device 210-a, a second power quantity associated with that antenna set, or a corresponding threshold of both. In some examples, the uplink gain factor and the downlink gain factor each satisfy a corresponding threshold associated with channel reciprocity.

[0113] At 435, network entity 105-c can select the channel rank and MCS based on the uplink gain factor, downlink gain factor, pre-decoding matrix, or any combination thereof. At 440, network entity 105-c can output downlink signaling based on the channel rank and MCS. At 445, repeater device 210-b can forward downlink signaling to UE 115-c.

[0114] Figure 5 A block diagram 500 of a device 505 supporting repeater downlink channel probing using SRS according to one or more aspects of this disclosure is shown. Device 505 may be an example of aspects of network entity 105 as described herein. Device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. Device 505, or one or more components of device 505 (e.g., receiver 510, transmitter 515, and communication manager 520), may include at least one processor that may be coupled to at least one memory to individually or jointly support or implement the described techniques. Each of these components may communicate with each other (e.g., via one or more buses).

[0115] Receiver 510 may provide components for acquiring (e.g., receiving, determining, identifying) information (such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units)) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack). The information may be passed to other components of device 505. In some examples, receiver 510 may support acquiring information by receiving signals via one or more antennas. Additionally or alternatively, receiver 510 may support acquiring information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0116] Transmitter 515 may provide components for outputting (e.g., transmitting, providing, conveying, transmitting) information generated by other components of device 505. For example, transmitter 515 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, transmitter 515 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, transmitter 515 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, transmitter 515 and receiver 510 may be co-located in a transceiver, which may include or be coupled to a modem.

[0117] The communication manager 520, receiver 510, transmitter 515, or various combinations thereof, or various components thereof, may be examples of components used to perform various aspects of repeater downlink channel probing using SRS as described herein. For example, the communication manager 520, receiver 510, transmitter 515, or various combinations thereof, or components thereof, may be able to perform one or more of the functions described herein.

[0118] In some examples, the communication manager 520, receiver 510, transmitter 515, or various combinations or components thereof may be implemented in hardware (e.g., in communication management circuitry). The hardware may include at least one of a processor, DSP, CPU, ASIC, FPGA, or other programmable logic device, microcontroller, discrete gate or transistor logic unit, discrete hardware component, or any combination thereof, configured as or otherwise individually or collectively to support components for performing the functions described herein. In some examples, at least one processor and at least one memory coupled to said at least one processor may be configured to perform one or more of the functions described herein (e.g., executing instructions stored in at least one memory individually or collectively by one or more processors).

[0119] Additionally or alternatively, the communication manager 520, receiver 510, transmitter 515, or various combinations or components thereof may be implemented in code executed by at least one processor (e.g., as communication management software or firmware). If implemented in code executed by at least one processor, the functionality of the communication manager 520, receiver 510, transmitter 515, or various combinations or components thereof may be performed by any combination of a general-purpose processor, DSP, CPU, ASIC, FPGA, microcontroller, or other programmable logic devices (e.g., configured as or otherwise individually or collectively to support components for performing the functions described in this disclosure).

[0120] In some examples, the communication manager 520 may be configured to use or otherwise cooperate with the receiver 510, transmitter 515, or both to perform various operations (e.g., receiving, acquiring, monitoring, outputting, transmitting). For example, the communication manager 520 may receive information from the receiver 510, transmit information to the transmitter 515, or be integrated in combination with the receiver 510, transmitter 515, or both to acquire information, output information, or perform various other operations as described herein.

[0121] Communication manager 520 may support wireless communication according to examples disclosed herein. For example, communication manager 520 may be capable of, configured to, or operable to support components for obtaining an indication from a repeater device of an uplink gain factor associated with an uplink transmission from the UE via the repeater device. Communication manager 520 may be capable of, configured to, or operable to support components for outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0122] By including or configuring a communication manager 520 according to an example as described herein, device 505 (e.g., controlling receiver 510, transmitter 515, communication manager 520 or a combination thereof or at least one processor otherwise coupled to them) can support techniques for reduced processing, reduced power consumption, and more efficient utilization of communication resources.

[0123] Figure 6 A block diagram 600 of a device 605 supporting repeater downlink channel probing using SRS, according to one or more aspects of this disclosure, is shown. Device 605 may be an example of aspects of device 505 or network entity 105 as described herein. Device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. Device 605, or one or more components of device 605 (e.g., receiver 610, transmitter 615, and communication manager 620), may include at least one processor that may be coupled to at least one memory to support the described techniques. Each of these components may communicate with each other (e.g., via one or more buses).

[0124] Receiver 610 may provide components for acquiring (e.g., receiving, determining, identifying) information (such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units)) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack). The information may be passed to other components of device 605. In some examples, receiver 610 may support acquiring information by receiving signals via one or more antennas. Additionally or alternatively, receiver 610 may support acquiring information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0125] Transmitter 615 may provide components for outputting (e.g., transmitting, providing, conveying, transmitting) information generated by other components of device 605. For example, transmitter 615 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, transmitter 615 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, transmitter 615 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, transmitter 615 and receiver 610 may be co-located in a transceiver, which may include or be coupled to a modem.

[0126] Device 605 or its various components may be examples of parts used to perform various aspects of repeater downlink channel probing using SRS as described herein. For example, communication manager 620 may include uplink gain indication component 625, downlink signaling component 630, or any combination thereof. Communication manager 620 may be examples of aspects of communication manager 520 as described herein. In some examples, communication manager 620 or its various components may be configured to use or otherwise cooperate with receiver 610, transmitter 615, or both to perform various operations (e.g., receiving, acquiring, monitoring, outputting, transmitting). For example, communication manager 620 may receive information from receiver 610, transmit information to transmitter 615, or be integrated in combination with receiver 610, transmitter 615, or both to acquire information, output information, or perform various other operations as described herein.

[0127] The communication manager 620 may support wireless communication according to examples disclosed herein. The uplink gain indication component 625 is capable of, configured to, or operable to support components for obtaining an indication from the repeater device of an uplink gain factor associated with an uplink transmission from the UE via the repeater device. The downlink signaling component 630 is capable of, configured to, or operable to support components for outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0128] Figure 7A block diagram 700 is shown of a communication manager 720 supporting repeater downlink channel probing using SRS according to one or more aspects of this disclosure. The communication manager 720 may be an example of aspects of the communication manager 520, communication manager 620, or both as described herein. The communication manager 720 or its various components may be examples of parts for performing various aspects of repeater downlink channel probing using SRS as described herein. For example, the communication manager 720 may include an uplink gain indication component 725, a downlink signaling component 730, a first SRS component 735, a second SRS component 740, a reference signal component 745, a downlink gain indication component 750, a channel quality component 755, or any combination thereof. These components, or each of their components or sub-components (e.g., one or more processors, one or more memories), may communicate directly or indirectly with each other (e.g., via one or more buses), and such communication may include communication within protocol layers of the protocol stack, communication associated with logical channels of the protocol stack (e.g., between protocol layers of the protocol stack, within devices, components, or virtualization components associated with network entity 105, between devices, components, or virtualization components associated with network entity 105), or any combination thereof.

[0129] The communication manager 720 can support wireless communication according to examples disclosed herein. The uplink gain indication component 725 is capable of, configured to, or operable to support components for obtaining an indication from the repeater device of an uplink gain factor associated with an uplink transmission from the UE via the repeater device. The downlink signaling component 730 is capable of, configured to, or operable to support components for outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0130] In some examples, the first SRS component 735 is capable of, configured to, or operable to support components for obtaining one or more first probe reference signals associated with the UE via a repeater device. In some examples, the second SRS component 740 is capable of, configured to, or operable to support components for obtaining one or more second probe reference signals associated with the repeater device, wherein the downlink gain factor is based on one or more first probe reference signals and one or more second probe reference signals.

[0131] In some examples, the channel quality component 755 is capable of, configured to, or able to operate to support components for estimating the channel quality between network entities and repeater devices based on one or more second probe reference signals, wherein the downlink gain factor is further based on the estimated channel quality.

[0132] In some examples, the selection of the pre-decoding matrix is ​​further based on the downlink gain factor. In some examples, the selection of the channel rank and MCS is based on an updated downlink gain factor, which is based on the pre-decoding matrix. In some examples, the selection of the channel rank and MCS is based on an updated pre-decoding matrix. In some examples, this updated pre-decoding matrix is ​​selected based on the downlink gain factor.

[0133] In some examples, the reference signal component 745 is capable of, configured to, or operable to support components for outputting one or more reference signals to a repeater device. In some examples, the downlink gain indication component 750 is capable of, configured to, or operable to support components for obtaining an indication of a downlink gain factor from a repeater device based on the output of one or more reference signals.

[0134] In some examples, one or more reference signals are output based on a pre-decoding matrix. In some examples, the relationship between the uplink gain factor and the downlink gain factor is based on the product of a first value and the identity matrix. In some examples, the first value varies over time.

[0135] Figure 8 A diagram of a system 800 including device 805 supporting repeater downlink channel probing using SRS, according to one or more aspects of this disclosure, is shown. Device 805 may be an example of device 505, device 605, or network entity 105 as described herein, or may include components thereof. Device 805 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, and such communication may include communication via one or more wired interfaces, one or more wireless interfaces, or any combination thereof. Device 805 may include components supporting output and acquisition of communication, such as a communication manager 820, a transceiver 810, an antenna 815, at least one memory 825, code 830, and at least one processor 835. These components may communicate electronically or otherwise coupled (e.g., operative ground, communication ground, functional ground, electronic ground, electrical ground) via one or more buses (e.g., bus 840).

[0136] Transceiver 810 may support bidirectional communication via a wired link, a wireless link, or both, as described herein. In some examples, transceiver 810 may include a wired transceiver and be able to communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, transceiver 810 may include a wireless transceiver and be able to communicate bidirectionally with another wireless transceiver. In some examples, device 805 may include one or more antennas 815 that may be able to transmit or receive wireless transmissions (e.g., concurrently). Transceiver 810 may also include a modem for: modulating a signal; providing the modulated signal for transmission (e.g., by one or more antennas 815, by a wired transmitter); receiving the modulated signal (e.g., from one or more antennas 815, from a wired receiver); and demodulating the signal. In some embodiments, transceiver 810 may include one or more interfaces, such as one or more interfaces coupled to one or more antennas 815 configured to support various receive or acquire operations, or one or more interfaces coupled to one or more antennas 815 configured to support various transmit or output operations, or combinations thereof. In some embodiments, transceiver 810 may include one or more processors or one or more memory components, or be configured to couple to such processors or memory components, which are operable to perform or support operations based on received or acquired information or signals, or generate information or other signals for transmission or other output, or any combination thereof. In some embodiments, transceiver 810, or transceiver 810 and one or more antennas 815, or transceiver 810 and one or more antennas 815 and one or more processors or one or more memory components (e.g., at least one processor 835, at least one memory 825, or both), may be included in a chip or chip assembly mounted in device 805. In some examples, transceiver 810 may be able to operate to support communication via one or more communication links (e.g., communication link 125, backhaul communication link 120, midhaul communication link 162, and fronthaul communication link 168).

[0137] At least one memory 825 may include RAM, ROM, or any combination thereof. At least one memory 825 may store computer-readable, computer-executable code 830 including instructions that, when executed by one or more processors of at least one processor 835, cause device 805 to perform the various functions described herein. Code 830 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 830 may not be directly executable by one of the processors of at least one processor 835, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, at least one memory 825 may also include a BIOS, among other things, that controls basic hardware or software operation, such as interaction with peripheral components or devices. In some examples, at least one processor 835 may include multiple processors, and at least one memory 825 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, which may be configured individually or collectively to perform the various functions described herein (e.g., as part of a processing system).

[0138] At least one processor 835 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, ASICs, CPUs, FPGAs, microcontrollers, programmable logic devices, discrete gate or transistor logic units, discrete hardware components, or any combination thereof). In some cases, at least one processor 835 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into one or more processors in at least one processor 835. At least one processor 835 may be configured to execute computer-readable instructions stored in memory (e.g., one or more memories in at least one memory 825) to cause device 805 to perform various functions (e.g., functions or tasks supporting repeater downlink channel probing using SRS). For example, device 805 or components of device 805 may include at least one processor 835 and at least one memory 825 coupled to one or more processors in at least one processor 835, wherein at least one processor 835 and at least one memory 825 are configured to perform the various functions described herein. At least one processor 835 may be an example of a cloud computing platform (e.g., one or more physical nodes and supporting software such as an operating system, virtual machine, or container instance) that can host functions (e.g., by executing code 830) to perform the functions of device 805. At least one processor 835 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in device 805 (such as within one or more memories in at least one memory 825). In some examples, at least one processor 835 may include multiple processors, and at least one memory 825 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, which may be configured individually or collectively to perform the various functions described herein.

[0139] In some examples, at least one processor 835 may be a component of a processing system, which may refer to a system of machines (such as a series of machines), circuits (including, for example, one or both of processor circuitry (which may include at least one processor 835) and memory circuitry (which may include at least one memory 825)) or components that receive or receive input and process the input to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, at least one processor 835 or a processing system including at least one processor 835 may be configured, capable of being configured, or operable to cause device 805 to perform one or more of the functions described herein. Furthermore, as described herein, “configured to,” “capable of being configured,” and “operable to” are used interchangeably and may be associated with the ability to perform one or more of the functions described herein when executing code stored in at least one memory 825 or otherwise.

[0140] In some examples, bus 840 may support communication at protocol layers of the protocol stack (e.g., within a protocol layer). In some examples, bus 840 may support communication associated with logical channels of the protocol stack (e.g., between protocol layers of the protocol stack), which may include communication performed within components of device 805, or communication performed between different components of device 805 that are co-addressable or may be located in different locations (e.g., where device 805 may refer to a system in which one or more of communication manager 820, transceiver 810, at least one memory 825, code 830 and at least one processor 835 may be located in one component of different components or partitioned between different components).

[0141] In some examples, the communication manager 820 can manage (e.g., via one or more wired or wireless backhaul links) various aspects of communication with the core network 130. For example, the communication manager 820 can manage the delivery of data communications by client devices such as one or more UEs 115. In some examples, the communication manager 820 can manage communication with other network entities 105 and may include a controller or scheduler for cooperating with other network entities 105 to control communication with UE 115. In some examples, the communication manager 820 may support the X2 interface in LTE / LTE-A wireless communication network technology to provide communication between network entities 105.

[0142] The communication manager 820 may support wireless communication according to examples disclosed herein. For example, the communication manager 820 may be capable of, configured to, or operable to support components for obtaining an indication from a repeater device of an uplink gain factor associated with an uplink transmission from the UE via the repeater device. The communication manager 820 may be capable of, configured to, or operable to support components for outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0143] By including or configuring a communication manager 820 according to an example as described herein, device 805 can support techniques for improving communication reliability, reducing latency, improving and reducing user experience related to processing, reducing power consumption, utilizing communication resources more efficiently, improving coordination between devices, extending battery life, and improving the utilization of processing power.

[0144] In some examples, the communication manager 820 may be configured to use or otherwise coordinate with the transceiver 810, one or more antennas 815 (e.g., where applicable), or any combination thereof to perform various operations (e.g., receiving, acquiring, monitoring, outputting, transmitting). Although the communication manager 820 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 820 may be supported or performed by the transceiver 810, one or more processors in at least one processor 835, one or more memories in at least one memory 825, code 830, or any combination thereof (e.g., by a processing system including at least a portion of at least one processor 835, at least one memory 825, code 830, or any combination thereof). For example, code 830 may include instructions that can be executed by one or more processors in at least one processor 835 to cause the device 805 to perform various aspects of repeater downlink channel probing using SRS as described herein, or at least one processor 835 and at least one memory 825 may be otherwise configured to perform or support such operations individually or jointly.

[0145] Figure 9A block diagram 900 of a device 905 supporting downlink channel probing of a repeater using SRS, according to one or more aspects of this disclosure, is shown. Device 905 may be an example of various aspects of a repeater device as described herein. Device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. Device 905, or one or more components of device 905 (e.g., receiver 910, transmitter 915, and communication manager 920), may include at least one processor that may be coupled to at least one memory to individually or jointly support or implement the described techniques. Each of these components may communicate with each other (e.g., via one or more buses).

[0146] Receiver 910 may provide components for acquiring (e.g., receiving, determining, identifying) information (such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units)) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack). The information may be passed to other components of device 905. In some examples, receiver 910 may support acquiring information by receiving signals via one or more antennas. Additionally or alternatively, receiver 910 may support acquiring information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0147] Transmitter 915 may provide components for outputting (e.g., transmitting, providing, conveying, transmitting) information generated by other components of device 905. For example, transmitter 915 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, transmitter 915 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, transmitter 915 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, transmitter 915 and receiver 910 may be co-located in a transceiver, which may include or be coupled to a modem.

[0148] The communication manager 920, receiver 910, transmitter 915, or various combinations thereof, or various components thereof, may be examples of components used to perform various aspects of repeater downlink channel probing using SRS as described herein. For example, the communication manager 920, receiver 910, transmitter 915, or various combinations thereof, or components thereof, may be able to perform one or more of the functions described herein.

[0149] In some examples, the communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be implemented in hardware (e.g., in communication management circuitry). The hardware may include at least one of a processor, DSP, CPU, ASIC, FPGA, or other programmable logic device, microcontroller, discrete gate or transistor logic unit, discrete hardware component, or any combination thereof, configured as or otherwise individually or collectively to support components for performing the functions described herein. In some examples, at least one processor and at least one memory coupled to said at least one processor may be configured to perform one or more of the functions described herein (e.g., executing instructions stored in at least one memory individually or collectively by one or more processors).

[0150] Additionally or alternatively, the communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be implemented in code executed by at least one processor (e.g., as communication management software or firmware). If implemented in code executed by at least one processor, the functionality of the communication manager 920, receiver 910, transmitter 915, or various combinations or components thereof may be performed by (e.g., a general-purpose processor, DSP, CPU, ASIC, FPGA, microcontroller, or any combination of these or other programmable logic devices configured, individually or collectively, to perform the functions described herein).

[0151] In some examples, the communication manager 920 may be configured to use or otherwise cooperate with the receiver 910, transmitter 915, or both to perform various operations (e.g., receiving, acquiring, monitoring, outputting, transmitting). For example, the communication manager 920 may receive information from the receiver 910, transmit information to the transmitter 915, or be integrated in combination with the receiver 910, transmitter 915, or both to acquire information, output information, or perform various other operations as described herein.

[0152] The communication manager 920 may support wireless communication according to examples disclosed herein. For example, the communication manager 920 may be capable of, configured to, or operable to support components for outputting an indication to a network entity of an uplink gain factor associated with an uplink transmission from the UE. The communication manager 920 may be capable of, configured to, or operable to support components for obtaining downlink signaling based on the channel rank and MCS corresponding to the uplink gain factor and downlink gain factor. The communication manager 920 may be capable of, configured to, or operable to support components for forwarding downlink signaling to the UE.

[0153] By including or configuring a communication manager 920 according to an example as described herein, device 905 (e.g., controlling receiver 910, transmitter 915, communication manager 920 or a combination thereof or at least one processor otherwise coupled to them) can support techniques for reduced processing, reduced power consumption, and more efficient utilization of communication resources.

[0154] Figure 10 A block diagram 1000 of a device 1005 supporting repeater downlink channel probing using SRS, according to one or more aspects of this disclosure, is shown. Device 1005 may be an example of aspects of device 905 as described herein or repeater device 210. Device 1005 may include receiver 1010, transmitter 1015, and communication manager 1020. Device 1005, or one or more components of device 1005 (e.g., receiver 1010, transmitter 1015, and communication manager 1020), may include at least one processor that may be coupled to at least one memory to support the described techniques. Each of these components may communicate with each other (e.g., via one or more buses).

[0155] Receiver 1010 may provide components for acquiring (e.g., receiving, determining, identifying) information (such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units)) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack). The information may be passed to other components of device 1005. In some examples, receiver 1010 may support acquiring information by receiving signals via one or more antennas. Additionally or alternatively, receiver 1010 may support acquiring information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.

[0156] Transmitter 1015 may provide components for outputting (e.g., transmitting, providing, conveying, transmitting) information generated by other components of device 1005. For example, transmitter 1015 may output information associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack), such as user data, control information, or any combination thereof (e.g., I / Q samples, symbols, packets, protocol data units, service data units). In some examples, transmitter 1015 may support outputting information by transmitting signals via one or more antennas. Additionally or alternatively, transmitter 1015 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof. In some examples, transmitter 1015 and receiver 1010 may be co-located in a transceiver, which may include or be coupled to a modem.

[0157] Device 1005 or its various components may be examples of parts used to perform various aspects of repeater downlink channel probing using SRS as described herein. For example, communication manager 1020 may include uplink gain indication component 1025, downlink signaling component 1030, forwarding component 1035, or any combination thereof. Communication manager 1020 may be examples of aspects of communication manager 920 as described herein. In some examples, communication manager 1020 or its various components may be configured to use or otherwise cooperate with receiver 1010, transmitter 1015, or both to perform various operations (e.g., receive, acquire, monitor, output, transmit). For example, communication manager 1020 may receive information from receiver 1010, transmit information to transmitter 1015, or be integrated in combination with receiver 1010, transmitter 1015, or both to acquire information, output information, or perform various other operations as described herein.

[0158] The communication manager 1020 can support wireless communication according to the examples disclosed herein. The uplink gain indication component 1025 is capable of, configured to, or operable to support components for outputting an indication to a network entity of an uplink gain factor associated with an uplink transmission from the UE. The downlink signaling component 1030 is capable of, configured to, or operable to support components for obtaining downlink signaling based on the channel rank and MCS corresponding to the uplink and downlink gain factors. The forwarding component 1035 is capable of, configured to, or operable to support components for forwarding downlink signaling to the UE.

[0159] Figure 11A block diagram 1100 of a communication manager 1120 supporting downlink channel probing of a repeater using SRS, according to one or more aspects of this disclosure, is shown. The communication manager 1120 may be an example of a communication manager 920, a communication manager 1020, or aspects thereof as described herein. The communication manager 1120 or its various components may be examples of parts for performing various aspects of downlink channel probing of a repeater using SRS as described herein. For example, the communication manager 1120 may include an uplink gain indication component 1125, a downlink signaling component 1130, a forwarding component 1135, a first SRS forwarding component 1140, a second SRS component 1145, a reference signaling component 1150, a downlink gain indication component 1155, or any combination thereof. Each of these components, or its components or sub-components (e.g., one or more processors, one or more memories), may communicate directly or indirectly with each other (e.g., via one or more buses).

[0160] The communication manager 1120 can support wireless communication according to examples disclosed herein. The uplink gain indication component 1125 is capable of, configured to, or operable to support components for outputting an indication to a network entity of an uplink gain factor associated with an uplink transmission from the UE. The downlink signaling component 1130 is capable of, configured to, or operable to support components for obtaining downlink signaling based on the channel rank and MCS corresponding to the uplink and downlink gain factors. The forwarding component 1135 is capable of, configured to, or operable to support components for forwarding downlink signaling to the UE.

[0161] In some examples, the first SRS forwarding component 1140 is capable of, configured to, or operable to support components for forwarding one or more first probe reference signals associated with the UE to network entities. In some examples, the second SRS component 1145 is capable of, configured to, or operable to support components for outputting one or more second probe reference signals associated with a repeater device to network entities, wherein downlink signaling is based on one or more first probe reference signals and one or more second probe reference signals.

[0162] In some examples, reference signaling component 1150 is capable of, configured to, or operable to support components for obtaining one or more downlink reference signals. In some examples, downlink gain indication component 1155 is capable of, configured to, or operable to support components for outputting an indication of a downlink gain factor to a network entity, wherein the downlink gain factor is based on one or more downlink reference signals, and wherein downlink signaling is based on the downlink gain factor.

[0163] In some examples, the downlink gain factor is based on interference associated with one or more wireless devices. In some examples, the uplink gain factor and downlink gain factor each satisfy a corresponding threshold based on a first power amount associated with each respective antenna in the antenna set of the repeater device or a second power amount associated with that antenna set.

[0164] In some examples, the uplink and downlink gain factors each satisfy a corresponding threshold associated with channel reciprocity. In some examples, the relationship between the uplink and downlink gain factors is based on the product of a first value and the identity matrix. In some examples, the first value varies over time.

[0165] Figure 12 A diagram of a system 1200 including a device 1205 supporting repeater downlink channel probing using SRS, according to one or more aspects of this disclosure, is shown. Device 1205 may be an example of device 905, device 1005, or a repeater device as described herein, or may include components thereof. Device 1205 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, such as a communication manager 1220, a transceiver 1210, an antenna 1215, at least one memory 1225, code 1230, and at least one processor 1235. These components may communicate electronically or be otherwise coupled (e.g., operative ground, communication ground, functional ground, electronic ground, electrical ground) via one or more buses (e.g., bus 1240).

[0166] Transceiver 1210 may support bidirectional communication via a wired link, a wireless link, or both, as described herein. In some examples, transceiver 1210 may include a wired transceiver and be able to communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, transceiver 1210 may include a wireless transceiver and be able to communicate bidirectionally with another wireless transceiver. In some examples, device 1205 may include one or more antennas 1215 that may be able to transmit or receive wireless transmissions (e.g., concurrently). Transceiver 1210 may also include a modem for: modulating a signal; providing the modulated signal for transmission (e.g., by one or more antennas 1215, by a wired transmitter); receiving the modulated signal (e.g., from one or more antennas 1215, from a wired receiver); and demodulating the signal. In some embodiments, transceiver 1210 may include one or more interfaces, such as one or more interfaces coupled to one or more antennas 1215 configured to support various receive or acquire operations, or one or more interfaces coupled to one or more antennas 1215 configured to support various transmit or output operations, or combinations thereof. In some embodiments, transceiver 1210 may include one or more processors or one or more memory components, or be configured to couple to such processors or memory components, which are operable to perform or support operations based on received or acquired information or signals, or generate information or other signals for transmission or other output, or any combination thereof. In some embodiments, transceiver 1210, or transceiver 1210 and one or more antennas 1215, or transceiver 1210 and one or more antennas 1215 and one or more processors or one or more memory components (e.g., at least one processor 1235, at least one memory 1225, or both), may be included in a chip or chip assembly mounted in device 1205. In some examples, transceiver 1210 may be operable to support communication via one or more communication links (e.g., communication link 125, backhaul communication link 120, midhaul communication link 162, and fronthaul communication link 168).

[0167] At least one memory 1225 may include RAM, ROM, or any combination thereof. At least one memory 1225 may store computer-readable, computer-executable code 1230 including instructions that, when executed by one or more of the at least one processor 1235, cause the device 1205 to perform the various functions described herein. The code 1230 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 1230 may not be directly executable by one of the at least one processor 1235, but may enable the computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, at least one memory 1225 may also include a BIOS, among other things, that controls basic hardware or software operation, such as interaction with peripheral components or devices. In some examples, at least one processor 1235 may include multiple processors, and at least one memory 1225 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, which may be configured individually or collectively to perform the various functions described herein (e.g., as part of a processing system).

[0168] At least one processor 1235 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, ASICs, CPUs, FPGAs, microcontrollers, programmable logic devices, discrete gate or transistor logic units, discrete hardware components, or any combination thereof). In some cases, at least one processor 1235 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into one or more processors in at least one processor 1235. At least one processor 1235 may be configured to execute computer-readable instructions stored in memory (e.g., one or more memories in at least one memory 1225) to cause device 1205 to perform various functions (e.g., functions or tasks supporting repeater downlink channel probing using SRS). For example, device 1205 or components of device 1205 may include at least one processor 1235 and at least one memory 1225 coupled to one or more processors in at least one processor 1235, wherein at least one processor 1235 and at least one memory 1225 are configured to perform the various functions described herein. At least one processor 1235 may be an example of a cloud computing platform (e.g., one or more physical nodes and supporting software such as an operating system, virtual machine, or container instance) that can host functions (e.g., by executing code 1230) to perform the functions of device 1205. At least one processor 1235 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in device 1205 (such as within one or more memories in at least one memory 1225). In some examples, at least one processor 1235 may include multiple processors, and at least one memory 1225 may include multiple memories. One or more of the multiple processors may be coupled to one or more of the multiple memories, which may be configured individually or collectively to perform the various functions described herein.

[0169] In some examples, at least one processor 1235 may be a component of a processing system, which may refer to a system of machines (such as a series of machines), circuits (including, for example, one or both of processor circuitry (which may include at least one processor 1235) and memory circuitry (which may include at least one memory 1225)) or components that receive or receive input and process the input to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, at least one processor 1235 or a processing system including at least one processor 1235 may be configured, capable of being configured, or operable to cause device 1205 to perform one or more of the functions described herein. Furthermore, as described herein, “configured to,” “capable of being configured,” and “operable to” are used interchangeably and may be associated with the ability to perform one or more of the functions described herein when executing code stored in at least one memory 1225 or otherwise.

[0170] In some examples, bus 1240 may support communication at the protocol layer of the protocol stack (e.g., within a protocol layer). In some examples, bus 1240 may support communication associated with logical channels of the protocol stack (e.g., between protocol layers of the protocol stack), which may include communication performed within components of device 1205, or communication performed between different components of device 1205 that are co-addressable or may be located in different locations (e.g., where device 1205 may refer to a system in which one or more of communication manager 1220, transceiver 1210, at least one memory 1225, code 1230 and at least one processor 1235 may be located in one component of different components or partitioned between different components).

[0171] In some examples, the communication manager 1220 can manage (e.g., via one or more wired or wireless backhaul links) various aspects of communication with the core network 130. For example, the communication manager 1220 can manage the delivery of data communications by client devices such as one or more UEs 115. In some examples, the communication manager 1220 can manage communication with other network entities 105 and may include a controller or scheduler for cooperating with other network entities 105 to control communication with UE 115. In some examples, the communication manager 1220 may support the X2 interface in LTE / LTE-A wireless communication network technology to provide communication between network entities 105.

[0172] The communication manager 1220 may support wireless communication according to examples disclosed herein. For example, the communication manager 1220 may be capable of, configured to, or operable to support components for outputting an indication to a network entity of an uplink gain factor associated with an uplink transmission from the UE. The communication manager 1220 may be capable of, configured to, or operable to support components for obtaining downlink signaling based on the channel rank and MCS corresponding to the uplink gain factor and downlink gain factor. The communication manager 1220 may be capable of, configured to, or operable to support components for forwarding downlink signaling to the UE.

[0173] By including or configuring a communication manager 1220 according to an example as described herein, device 1205 can support techniques for improving communication reliability, reducing latency, improving and reducing user experience related to processing, reducing power consumption, utilizing communication resources more efficiently, improving coordination between devices, extending battery life, and improving the utilization of processing power.

[0174] In some examples, the communication manager 1220 may be configured to use or otherwise coordinate with the transceiver 1210, one or more antennas 1215 (e.g., where applicable), or any combination thereof to perform various operations (e.g., receiving, acquiring, monitoring, outputting, transmitting). Although the communication manager 1220 is illustrated as a separate component, in some examples, one or more functions described with reference to the communication manager 1220 may be supported or performed by the transceiver 1210, one or more processors in at least one processor 1235, one or more memories in at least one memory 1225, code 1230, or any combination thereof (e.g., by a processing system including at least a portion of at least one processor 1235, at least one memory 1225, code 1230, or any combination thereof). For example, code 1230 may include instructions that can be executed by one or more processors of at least one processor 1235 to cause device 1205 to perform various aspects of repeater downlink channel probing using SRS as described herein, or at least one processor 1235 and at least one memory 1225 may otherwise be configured to perform or support such operations individually or jointly.

[0175] Figure 13 A flowchart illustrating method 1300 for repeater downlink channel probing using SRS, according to various aspects of this disclosure, is shown. Operation of method 1300 may be implemented by a network entity or its components as described herein. For example, operation of method 1300 may be implemented by, as referenced... Figures 1 to 8The network entity described herein performs the function. In some examples, the network entity may execute a set of instructions to control the functional elements of the network entity to perform the described function. Additionally or alternatively, the network entity may use dedicated hardware to perform aspects of the described function.

[0176] At 1305, the method may include: obtaining from the repeater device an indication of an uplink gain factor associated with an uplink transmission from the UE via the repeater device. Operation of block 1305 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1305 may be provided by reference to... Figure 7 The described uplink gain indication component 725 performs this function.

[0177] At 1310, the method may include: outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on an uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix. The operation of block 1310 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1310 may be provided by reference to [reference needed]. Figure 7 The downlink signaling component 730 described herein is used to perform this action.

[0178] Figure 14 A flowchart illustrating a method 1400 for repeater downlink channel probing using SRS, exemplified according to various aspects of this disclosure, is shown. Operation of method 1400 may be implemented by a network entity or its components as described herein. For example, operation of method 1400 may be implemented by, as referenced... Figures 1 to 8 The network entity described herein performs the function. In some examples, the network entity may execute a set of instructions to control the functional elements of the network entity to perform the described function. Additionally or alternatively, the network entity may use dedicated hardware to perform aspects of the described function.

[0179] At 1405, the method may include: obtaining from the repeater device an indication of an uplink gain factor associated with an uplink transmission from the UE via the repeater device. Operation of block 1405 may be performed according to examples as disclosed herein. In some examples, aspects of operation of 1405 may be provided by reference to... Figure 7 The described uplink gain indication component 725 performs this function.

[0180] At 1410, the method may include: obtaining one or more first probe reference signals associated with the UE via a repeater device. Operation of block 1410 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1410 may be provided by reference to... Figure 7 The first SRS component 735 described is used to perform this.

[0181] At 1415, the method may include: obtaining one or more second probe reference signals associated with the repeater device, wherein the downlink gain factor is based on one or more first probe reference signals and one or more second probe reference signals. The operation of block 1415 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1415 may be provided by reference to... Figure 7 The second SRS component 740 described is used to perform this.

[0182] At 1420, the method may include: outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on an uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix. The operation of block 1420 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1420 may be provided by reference to [reference needed]. Figure 7 The downlink signaling component 730 described herein is used to perform this action.

[0183] Figure 15 A flowchart illustrating a method 1500 for repeater downlink channel probing using SRS, exemplified according to various aspects of this disclosure, is shown. Operation of method 1500 can be implemented by a network entity or its components as described herein. For example, operation of method 1500 can be implemented by, as referenced... Figures 1 to 8 The network entity described herein performs the function. In some examples, the network entity may execute a set of instructions to control the functional elements of the network entity to perform the described function. Additionally or alternatively, the network entity may use dedicated hardware to perform aspects of the described function.

[0184] At 1505, the method may include: obtaining from the repeater device an indication of an uplink gain factor associated with an uplink transmission from the UE via the repeater device. Operation of block 1505 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1505 may be provided by reference to... Figure 7 The described uplink gain indication component 725 performs this function.

[0185] At 1510, the method may include: outputting one or more reference signals to a repeater device. The operation of block 1510 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1510 may be determined by reference to... Figure 7 The reference signal component 745 described herein shall be used to perform this action.

[0186] At 1515, the method may include: obtaining an indication of a downlink gain factor from a repeater device based on outputting one or more reference signals. The operation of block 1515 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1515 may be determined by reference to... Figure 7 The downlink gain indication component 750 is described as performing this action.

[0187] At 1520, the method may include: outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, channel rank, and MCS associated with downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on an uplink gain factor, and wherein the channel rank and MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix. The operation of block 1520 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1520 may be provided by reference to [reference needed]. Figure 7 The downlink signaling component 730 described herein is used to perform this action.

[0188] Figure 16 A flowchart illustrating a method 1600 for repeater downlink channel probing using SRS, exemplified according to various aspects of this disclosure, is shown. Operation of method 1600 can be implemented by a repeater device or its components as described herein. For example, operation of method 1600 can be achieved by, as referenced... Figures 1 to 4 and Figures 9 to 12 The described repeater device performs this function. In some examples, the repeater device may execute a set of instructions to control the functional elements of the repeater device to perform the described function. Additionally or alternatively, the repeater device may use dedicated hardware to perform aspects of the described function.

[0189] At 1605, the method may include: outputting to a network entity an indication of an uplink gain factor associated with an uplink transmission from the UE. The operation of block 1605 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1605 may be provided by reference to [reference needed]. Figure 11 The uplink gain indication component 1125 is described as performing this action.

[0190] At 1610, the method may include obtaining downlink signaling based on the channel rank and MCS corresponding to the uplink gain factor and the downlink gain factor. The operation of block 1610 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1610 may be derived from references... Figure 11 The downlink signaling component 1130 described herein is used to perform this action.

[0191] At 1615, the method may include: forwarding downlink signaling to the UE. The operation of block 1615 may be performed according to examples as disclosed herein. In some examples, aspects of the operation of 1615 may be derived from references... Figure 11 The described forwarding component 1135 is used to perform this.

[0192] The following provides an overview of the various aspects of this disclosure: Aspect 1: A method for wireless communication at a network entity, the method comprising: obtaining from a repeater device an indication of an uplink gain factor associated with an uplink transmission from a UE via the repeater device; and outputting downlink signaling to the UE via the repeater device based on a pre-decoding matrix, a channel rank, and an MCS associated with a downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and the MCS are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

[0193] Aspect 2: According to the method of aspect 1, the method further includes: obtaining one or more first SRS associated with the UE via the repeater device; and obtaining one or more second SRS associated with the repeater device, wherein the downlink gain factor is at least partially based on the one or more first SRS and the one or more second SRS.

[0194] Aspect 3: According to the method of aspect 2, the method further includes: estimating the channel quality between the network entity and the repeater device based at least in part on the one or more second SRS, wherein the downlink gain factor is further based at least in part on the estimated channel quality.

[0195] Aspect 4: The method according to any one of Aspects 2 to 3, wherein the selection of the pre-decoding matrix is ​​further based at least in part on the downlink gain factor.

[0196] Aspect 5: According to the method of aspect 4, wherein the selection of the channel rank and the MCS is at least partially based on an updated downlink gain factor, the updated downlink gain factor being at least partially based on the pre-decoding matrix.

[0197] Aspect 6: The method according to any one of Aspects 2 to 5, wherein the selection of the channel rank and the MCS is at least partially based on an updated pre-decoding matrix, the updated pre-decoding matrix being selected at least partially based on the downlink gain factor.

[0198] Aspect 7: The method according to aspect 1, the method further comprising: outputting one or more reference signals to the repeater device; and obtaining an indication of the downlink gain factor from the repeater device based at least in part on the output of the one or more reference signals.

[0199] Aspect 8: According to the method of aspect 7, wherein the one or more reference signals are output based on the pre-decoding matrix.

[0200] Aspect 9: The method according to any one of Aspects 1 to 8, wherein the relationship between the uplink gain factor and the downlink gain factor is at least partially based on the product of a first value and an identity matrix.

[0201] Aspect 10: The method according to aspect 9, wherein the first value changes over time.

[0202] Aspect 11: A method for wireless communication at a repeater device, the method comprising: outputting to a network entity an indication of an uplink gain factor associated with an uplink transmission from a UE; obtaining downlink signaling based on a channel rank and MCS corresponding to the uplink gain factor and the downlink gain factor; and forwarding the downlink signaling to the UE.

[0203] Aspect 12: The method according to aspect 11, the method further comprising: forwarding one or more first SRS associated with the UE to the network entity; and outputting one or more second SRS associated with the repeater device to the network entity, wherein the downlink signaling is at least partially based on the one or more first SRS and the one or more second SRS.

[0204] Aspect 13: The method according to aspect 11, the method further comprising: obtaining one or more downlink reference signals; and outputting an indication of the downlink gain factor to the network entity, wherein the downlink gain factor is at least partially based on the one or more downlink reference signals, and wherein the downlink signaling is at least partially based on the downlink gain factor.

[0205] Aspect 14: The method according to aspect 13, wherein the downlink gain factor is based at least in part on interference associated with one or more wireless devices.

[0206] Aspect 15: The method according to any one of Aspects 11 to 14, wherein the uplink gain factor and the downlink gain factor each satisfy a threshold based at least in part on a first power amount associated with each respective antenna in the antenna set of the repeater device or a second power amount associated with the antenna set.

[0207] Aspect 16: The method according to any one of Aspects 11 to 15, wherein the uplink gain factor and the downlink gain factor each satisfy a corresponding threshold associated with channel reciprocity.

[0208] Aspect 17: The method according to any one of Aspects 11 to 16, wherein the relationship between the uplink gain factor and the downlink gain factor is based at least in part on the product of a first value and an identity matrix.

[0209] Aspect 18: The method according to aspect 17, wherein the first value changes over time.

[0210] Aspect 19: A network entity for wireless communication, the network entity comprising: one or more memories storing processor-executable code; and one or more processors coupled to the one or more memories and capable of operating individually or jointly to execute the code to cause the network entity to perform a method according to any one of Aspects 1 to 10.

[0211] Aspect 20: A network entity for wireless communication, the network entity comprising at least one component for performing the method according to any one of aspects 1 to 10.

[0212] Aspect 21: A non-transitory computer-readable medium storing code for wireless communication, said code comprising instructions executable by one or more processors to perform the method according to any one of aspects 1 to 10.

[0213] Aspect 22: A repeater device for wireless communication, the repeater device comprising: one or more memories storing processor-executable code; and one or more processors coupled to the one or more memories and capable of operating individually or jointly to execute the code to cause the repeater device to perform a method according to any one of Aspects 11 to 18.

[0214] Aspect 23: A repeater device for wireless communication, the repeater device comprising at least one component for performing the method according to any one of aspects 11 to 18.

[0215] Aspect 24: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by one or more processors to perform the method according to any one of aspects 11 to 18.

[0216] It should be noted that the methods described herein describe possible specific implementations, and the operations and steps can be rearranged or otherwise modified, and other specific implementations are also possible. Furthermore, aspects from two or more of these methods can be combined.

[0217] While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein are also applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described are applicable to a variety of other wireless communication systems, such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0218] The information and signals described herein can be represented using any of a variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or optical particles, or any combination thereof.

[0219] The various exemplary blocks and components described herein can be implemented or performed using a general-purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic unit, discrete hardware component, or any combination thereof, designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in alternative embodiments, a processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration). Any function or operation described herein that can be performed by a processor may be performed by multiple processors capable of performing the described functions or operations individually or jointly.

[0220] The functions described herein can be implemented using hardware, software executed by a processor, firmware, or any combination thereof. When implemented using software executed by a processor, the functions can be stored as one or more instructions or code on a computer-readable medium or transmitted using one or more instructions or code on a computer-readable medium. Other examples and specific implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these. Features implementing the functions can also be physically located in various locations, including portions distributed such that the functions are implemented in different physical locations.

[0221] Computer-readable media includes both non-transitory computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. Non-transitory storage media can be any available medium accessible by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compressed optical disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code components in the form of instructions or data structures, and accessible by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Furthermore, any connection is appropriately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included within the definition of computer-readable media. As used herein, disks and optical discs include CDs, laser discs, optical discs, digital multifunction discs (DVDs), floppy disks, and Blu-ray discs. Disks can magnetically reproduce data, and optical discs can optically reproduce data using lasers. Combinations of the above are also included within the scope of computer-readable media. Any function or operation described herein that can be performed by memory can be performed by multiple memories capable of performing the described function or operation individually or jointly.

[0222] As used herein, the word "or" in a list of items (e.g., a list of items accompanied by phrases such as "at least one of" or "one or more of") in the claims indicates an inclusive list, such that a list of at least one of, for example, 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). Furthermore, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an example step described as "based on condition A" could be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0223] As used herein, including in claims, the article “a” preceding a noun is open-ended and is understood to refer to “at least one” or “one or more” of those nouns. Therefore, the terms “a,” “at least one,” “one or more,” and “at least one of one or more” are interchangeable. For example, where a claim enumerates “components” performing one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components. Thus, the term “component” having a characteristic or performing a function may refer to “at least one of one or more components” having a particular characteristic or performing a particular function. Subsequent references to a component introduced with the article “a” using the terms “the” or “the” may refer to any or all of the one or more components. For example, a component introduced with the article “a” may be understood to mean “one or more components,” and subsequent reference to “the component” in a claim may be understood to be equivalent to referring to “at least one of the one or more components.” Similarly, subsequent references to a component introduced with the terms “the” or “the” as “one or more components” may refer to any or all of the one or more components. For example, reference to "the one or more components" in the subsequent claims can be understood as equivalent to reference to "at least one of the one or more components".

[0224] The term "determine" encompasses a variety of actions, and therefore, "determine" can include calculation, computation, processing, derivation, investigation, lookup (such as by searching in a table, database, or other data structure), identification, and similar actions. Furthermore, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data stored in memory), etc. Moreover, "determine" can include parsing, acquiring, selecting, choosing, building, and other similar actions.

[0225] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, various components of the same type can be distinguished by adding a dash after the reference numeral and a second reference numeral to differentiate them. If only the first reference numeral is used in the description, the description can be applied to any of the similar components having the same first reference numeral, regardless of the second or other subsequent reference numerals.

[0226] The description herein, illustrated with reference to the accompanying drawings, describes an example configuration and does not represent all achievable examples or those within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration," not "preferred" or "advantageous over other examples." The detailed description includes specific details used to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concept of the described examples.

[0227] The description herein is provided to enable those skilled in the art to implement or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of this disclosure. Therefore, this 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 network entity, the network entity comprising: One or more memories, wherein the one or more memories store processor-executable code; and One or more processors, coupled to one or more memories and capable of operating individually or jointly to execute the code to enable the network entity: Obtain from the repeater device an indication of the uplink gain factor associated with uplink transmissions from the user equipment (UE) via the repeater device; and Downlink signaling is output to the UE via the repeater device according to a pre-decoding matrix, channel rank, and modulation and decoding scheme associated with downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and the modulation and decoding scheme are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

2. The network entity of claim 1, wherein the one or more processors are individually or jointly further operable to execute the code to cause the network entity to: Obtain one or more first detection reference signals associated with the UE via the repeater device; and One or more second probe reference signals associated with the repeater device are obtained, wherein the downlink gain factor is at least partially based on the one or more first probe reference signals and the one or more second probe reference signals.

3. The network entity of claim 2, wherein the one or more processors are individually or jointly further operable to execute the code to cause the network entity to: The channel quality between the network entity and the repeater device is estimated at least in part based on the one or more second probe reference signals, wherein the downlink gain factor is further at least in part based on the estimated channel quality.

4. The network entity of claim 2, wherein the selection of the pre-decoding matrix is ​​further based at least in part on the downlink gain factor.

5. The network entity of claim 4, wherein the selection of the channel rank and the modulation and decoding scheme is at least in part based on an updated downlink gain factor, the updated downlink gain factor being at least in part based on the pre-decoding matrix.

6. The network entity according to claim 2, wherein: The selection of the channel rank and the modulation and decoding scheme is based at least in part on the updated pre-decoding matrix, wherein the updated pre-decoding matrix is ​​selected at least in part on the downlink gain factor.

7. The network entity of claim 1, wherein the one or more processors are individually or jointly further operable to execute the code to cause the network entity to: Output one or more reference signals to the repeater device; and The indication of the downlink gain factor is obtained from the repeater device, at least in part, based on the output of the one or more reference signals.

8. The network entity of claim 7, wherein the one or more reference signals are output according to the pre-decoding matrix.

9. The network entity of claim 1, wherein the relationship between the uplink gain factor and the downlink gain factor is at least partially based on the product of the first value and the identity matrix.

10. The network entity of claim 9, wherein the first value varies over time.

11. A repeater device, the repeater device comprising: One or more memories, wherein the one or more memories store processor-executable code; and One or more processors, coupled to the one or more memories and capable of operating individually or jointly to execute the code to enable the repeater device: Output an indication to the network entity of the uplink gain factor associated with the uplink transmission from the user equipment (UE); Downlink signaling is obtained based on the channel rank and MCS corresponding to the uplink gain factor and downlink gain factor; as well as The downlink signaling is forwarded to the UE.

12. The repeater device of claim 11, wherein the one or more processors are individually or jointly further operable to execute the code to cause the repeater device to: Forward one or more first probe reference signals associated with the UE to the network entity; and The network entity outputs one or more second probe reference signals associated with the repeater device, wherein the downlink signaling is based at least in part on the one or more first probe reference signals and the one or more second probe reference signals.

13. The repeater device of claim 11, wherein the one or more processors are individually or jointly further operable to execute the code to cause the repeater device to: Obtain one or more downlink reference signals; and The network entity outputs an indication of the downlink gain factor, wherein the downlink gain factor is at least partially based on the one or more downlink reference signals, and wherein the downlink signaling is at least partially based on the downlink gain factor.

14. The repeater device of claim 13, wherein the downlink gain factor is at least partially based on interference associated with one or more wireless devices.

15. The repeater device of claim 11, wherein the uplink gain factor and the downlink gain factor each satisfy a threshold based at least in part on a first power amount associated with each respective antenna in the antenna set of the repeater device or a second power amount associated with the antenna set.

16. The repeater device of claim 11, wherein the uplink gain factor and the downlink gain factor each satisfy a corresponding threshold associated with channel reciprocity.

17. The repeater device of claim 11, wherein the relationship between the uplink gain factor and the downlink gain factor is at least partially based on the product of a first value and an identity matrix.

18. The repeater device of claim 17, wherein the first value varies over time.

19. A method for conducting wireless communication at a network entity, the method comprising: Obtain an indication from the repeater device of the uplink gain factor associated with uplink transmissions from the user equipment (UE) via the repeater device; as well as Downlink signaling is output to the UE via the repeater device according to a pre-decoding matrix, channel rank, and modulation and decoding scheme associated with downlink transmission to the UE via the repeater device, wherein the pre-decoding matrix is ​​selected based on the uplink gain factor, and wherein the channel rank and the modulation and decoding scheme are selected based on the uplink gain factor, the downlink gain factor, and the pre-decoding matrix.

20. The method according to claim 19, further comprising: One or more first detection reference signals associated with the UE are obtained via the repeater device; as well as One or more second probe reference signals associated with the repeater device are obtained, wherein the downlink gain factor is at least partially based on the one or more first probe reference signals and the one or more second probe reference signals.

21. The method according to claim 20, further comprising: The channel quality between the network entity and the repeater device is estimated at least in part based on the one or more second probe reference signals, wherein the downlink gain factor is further at least in part based on the estimated channel quality.

22. The method of claim 20, wherein the selection of the pre-decoding matrix is ​​further based at least in part on the downlink gain factor.

23. The method of claim 22, wherein the selection of the channel rank and the modulation and decoding scheme is based at least in part on an updated downlink gain factor, the updated downlink gain factor being based at least in part on the pre-decoding matrix.

24. The method of claim 20, wherein the selection of the channel rank and the modulation and decoding scheme is at least in part based on an updated pre-decoding matrix, wherein the updated pre-decoding matrix is ​​selected at least in part based on the downlink gain factor.

25. The method according to claim 19, further comprising: Output one or more reference signals to the repeater device; as well as The indication of the downlink gain factor is obtained from the repeater device, at least in part, based on the output of the one or more reference signals.

26. The method of claim 25, wherein the one or more reference signals are output based on the pre-decoding matrix.

27. The method of claim 19, wherein the relationship between the uplink gain factor and the downlink gain factor is at least in part based on the product of the first value and the identity matrix.

28. A method for wireless communication at a repeater device, the method comprising: Output an indication to the network entity of the uplink gain factor associated with the uplink transmission from the user equipment (UE); Downlink signaling is obtained based on the channel rank corresponding to the uplink gain factor and downlink gain factor, as well as the modulation and decoding scheme; as well as The downlink signaling is forwarded to the UE.

29. The method according to claim 28, further comprising: Forward one or more first probe reference signals associated with the UE to the network entity; as well as The network entity outputs one or more second probe reference signals associated with the repeater device, wherein the downlink signaling is based at least in part on the one or more first probe reference signals and the one or more second probe reference signals.

30. The method according to claim 28, further comprising: Obtain one or more downlink reference signals; as well as The network entity outputs an indication of the downlink gain factor, wherein the downlink gain factor is at least partially based on the one or more downlink reference signals, and wherein the downlink signaling is at least partially based on the downlink gain factor.

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