Spatial metric based mobility procedures using multi-port mobility reference signals

Abstract

Methods, systems, and devices for wireless communication are described. In some wireless communication systems, a user equipment (UE) and a network entity may utilize multi-port mobility reference signals to assist space-based mobility procedures. The UE may receive reference signals associated with a plurality of antenna ports. The UE may measure a multi-dimensional channel response based on the reference signal. The multi-dimensional channel response may be associated with measured channel metrics corresponding to the plurality of antenna ports. The UE may send a report including a channel measurement vector based on the multi-dimensional channel response. The channel measurement vector may indicate a plurality of measured channel metrics for one or more dimensions of the multi-dimensional channel response. The network entity may send a message indicating one or more metrics associated with mobility management for the UE based on the report indicating the channel measurement vector.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. patent application No. 17 / 903,834, filed by JIANG et al. on September 6, 2022, entitled “SPATIAL METRICBASED MOBILITY PROCEDURES USING MULIT-PORT MOBILITY REFERENCE SIGNALS,” which is assigned to the assignee of this application and is expressly incorporated herein by reference in its entirety. Technical Field

[0003] The following relates to wireless communications including spatial metric based mobility procedures using a multi-port mobility reference signal. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, and the like. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems) and fifth generation (5G) systems (which may be referred to as new radio (NR) systems). These systems may employ techniques such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations, each of which supports wireless communications for communication devices, which may be referred to as user equipment (UE).

[0005] In some systems, the UE may receive a reference signal from a network entity. The UE may report the signal strength of the reference signal to the network entity. The network entity may utilize the reported signal strength to perform mobility management procedures for the UE, such as cell selection, beam selection, or both. Summary of the invention

[0006] The described technology relates to improved methods, systems, devices and apparatuses for supporting spatial metric-based mobility procedures using multi-port mobility reference signals. For example, the described technology enables a user equipment (UE) to measure a multi-port reference signal and report channel measurements across multiple spatial dimensions, which can improve the reliability of mobility management procedures. The UE can receive a reference signal (e.g., a multi-port reference signal) associated with multiple antenna ports from one or more network entities. The UE can measure a multi-dimensional channel response of the reference signal. The multi-dimensional channel response can be associated with multiple measured channel metrics corresponding to the multiple antenna ports. In some aspects, the UE can measure the channel response of the reference signal received from each antenna port, and the UE can cascade the channel response to obtain a multi-dimensional channel response. The UE can decompose the multi-dimensional channel response into multiple dimensions. The UE can send a report including a channel measurement vector to the network entity. The channel measurement vector can indicate multiple measured channel metrics for one or more dimensions of the channel response based on the decomposed multi-dimensional channel response. The network entity can receive the channel measurement vector and determine one or more mobility management decisions (e.g., cell selection, beam selection) for the UE based on the channel measurements across multiple spatial dimensions. Additionally or alternatively, the UE may autonomously determine mobility management decisions based on the channel measurement vector.By performing mobility management procedures based on channel measurements as well as spatial information, network entities and UEs may improve reliability and throughput of communications.

[0007] A method for wireless communication at a UE is described. The method may include: receiving a reference signal associated with a set of multiple antenna ports; measuring a multi-dimensional channel response based on receiving the reference signal, the multi-dimensional channel response associated with a set of multiple measured channel metrics corresponding to the set of multiple antenna ports; and sending a report including a channel measurement vector based on measuring the multi-dimensional channel response, the channel measurement vector indicating the set of multiple measured channel metrics for one or more dimensions of the multi-dimensional channel response.

[0008] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: receive a reference signal associated with a set of multiple antenna ports; measure a multidimensional channel response based on receiving the reference signal, the multidimensional channel response being associated with a set of multiple measured channel metrics corresponding to the set of multiple antenna ports; and send a report including a channel measurement vector based on measuring the multidimensional channel response, the channel measurement vector indicating the set of multiple measured channel metrics for one or more dimensions of the multidimensional channel response.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include: means for receiving a reference signal associated with a set of multiple antenna ports; means for measuring a multi-dimensional channel response based on receiving the reference signal, the multi-dimensional channel response associated with a set of multiple measured channel metrics corresponding to the set of multiple antenna ports; and means for sending a report including a channel measurement vector based on measuring the multi-dimensional channel response, the channel measurement vector indicating the set of multiple measured channel metrics for one or more dimensions of the multi-dimensional channel response.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to: receive a reference signal associated with a set of multiple antenna ports; measure a multi-dimensional channel response based on receiving the reference signal, the multi-dimensional channel response associated with a set of multiple measured channel metrics corresponding to the set of multiple antenna ports; and send a report including a channel measurement vector based on measuring the multi-dimensional channel response, the channel measurement vector indicating the set of multiple measured channel metrics for one or more dimensions of the multi-dimensional channel response.

[0011] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving a reference signal may include operations, features, components, or instructions for receiving a reference signal from a set of multiple antenna ports associated with the same cell identifier (ID) and the same beam ID, wherein a channel measurement vector indicates a set of multiple measured channel metrics associated with the same cell ID and the same beam ID.

[0012] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving a reference signal may include operations, features, components, or instructions for receiving a reference signal from a set of multiple antenna ports associated with two or more cell IDs, two or more beam IDs, or both, wherein a channel measurement vector indicates a set of multiple measured channel metrics associated with two or more cell IDs, two or more beam IDs, or both.

[0013] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, measuring a multidimensional channel response may include operations, features, components, or instructions for: measuring a corresponding channel response associated with each of two or more cell IDs, associated with each of two or more beam IDs, or associated with both; and cascading the corresponding channel responses to obtain a multidimensional channel response.

[0014] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: measuring a set of multiple channel metrics based on a multidimensional channel response; and determining a channel metric subset of the set of multiple channel metrics associated with a subset of one or more dimensions of the multidimensional channel response, the channel metric subset being associated with a maximum metric value, wherein the channel measurement vector includes the channel metric subset based on the determined channel metric subset.

[0015] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving a signal indicating that two or more cell IDs, two or more beam IDs, or both support coherent joint transmission or non-coherent joint transmission for multi-port channel measurement.

[0016] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining that two or more cell IDs, two or more beam IDs, or both support coherent joint transmission or incoherent joint transmission for multi-port channel measurement based on values ​​of the two or more cell IDs, two or more beam IDs, or both.

[0017] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining that two or more cell IDs, two or more beam IDs, or both support coherent joint transmission or non-coherent joint transmission for multi-port channel measurement based on a multiplexing pattern associated with a reference signal.

[0018] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, measuring a multidimensional channel response may include operations, features, components, or instructions for: measuring a channel response vector associated with receiving a reference signal from a set of multiple antenna ports; and performing a transform on the channel response vector to obtain one or more dimensions of the multidimensional channel response.

[0019] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining whether a reference signal may be associated with beamforming for one or more subsets of antenna ports in a set of multiple antenna ports, wherein performing a transformation on a channel response vector may be based on the determination.

[0020] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for whitening a channel response vector based on an interference covariance structure, where the channel response vector may be measured across multiple antennas supporting joint antenna processing.

[0021] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for measuring a set of multiple measured channel metrics based on decomposing a channel response vector into one or more dimensions.

[0022] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, each measured channel metric in a set of multiple measured channel metrics in a channel measurement vector may be associated with a corresponding antenna port in a set of multiple antenna ports.

[0023] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, each measured channel metric in a set of multiple measured channel metrics in a channel measurement vector can be associated with a corresponding set of two or more antenna ports in a set of multiple antenna ports.

[0024] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving a message indicating one or more metrics associated with mobility management for the UE based on a report indicating a channel measurement vector.

[0025] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for determining one or more metrics associated with mobility management for a UE based on a report indicative of a channel measurement vector.

[0026] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, receiving a reference signal may include operations, features, components, or instructions for receiving a reference signal from a set of multiple antenna ports based on frequency domain multiplexing across a set of multiple frequency combs, time domain multiplexing across a set of multiple symbols, delay domain multiplexing across a set of multiple cyclic shifts, code domain multiplexing, or non-orthogonal code division multiplexing.

[0027] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, a set of multiple measured channel metrics includes a signal strength metric, a spectral efficiency metric, a rank metric, a set of antenna ports in a set of multiple antenna ports that can be associated with each measured channel metric in the set of multiple measured channel metrics, or any combination thereof.

[0028] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the reference signal includes a synchronization signal block (SSB), a tracking reference signal (TRS), or a channel state information reference signal (CSI-RS).

[0029] A method of wireless communication at a network entity is described. The method may include: sending a reference signal associated with a set of multiple antenna ports; receiving a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to the set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal; and sending a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based on the report indicating the channel measurement vector.

[0030] An apparatus for wireless communication at a network entity is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: send a reference signal associated with a set of multiple antenna ports; receive a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to the set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal; and send a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based on the report indicating the channel measurement vector.

[0031] Another apparatus for wireless communication at a network entity is described. The apparatus may include: means for sending a reference signal associated with a set of multiple antenna ports; means for receiving a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to the set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal; and means for sending a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based on the report indicating the channel measurement vector.

[0032] A non-transitory computer-readable medium storing code for wireless communication at a network entity is described. The code may include instructions executable by a processor to: send a reference signal associated with a set of multiple antenna ports; receive a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to the set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal; and send a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based on the report indicating the channel measurement vector.

[0033] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending a reference signal may include operations, features, components, or instructions for sending a reference signal from a set of multiple antenna ports of a network entity, the set of multiple antenna ports being associated with a same cell ID and a same beam ID, wherein a channel measurement vector indicates a set of multiple measured channel metrics associated with the same cell ID and the same beam ID.

[0034] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending a reference signal may include operations, features, components, or instructions for sending a reference signal from a set of multiple antenna ports, the set of multiple antenna ports being associated with two or more cell IDs, two or more beam IDs, or both, wherein a channel measurement vector indicates a set of multiple measured channel metrics associated with the two or more cell IDs, two or more beam IDs, or both.

[0035] Some examples of the methods, apparatus, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending a signal indicating that two or more cell IDs, two or more beam IDs, or both support coherent joint transmission or non-coherent joint transmission for channel measurement.

[0036] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, each measured channel metric in a set of multiple measured channel metrics in a channel measurement vector may be associated with a corresponding antenna port in a set of multiple antenna ports.

[0037] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, each measured channel metric in a set of multiple measured channel metrics in a channel measurement vector can be associated with a corresponding set of two or more antenna ports in a set of multiple antenna ports.

[0038] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, sending a reference signal may include operations, features, components, or instructions for sending a reference signal from a set of multiple antenna ports using frequency domain multiplexing across a set of multiple frequency combs, time domain multiplexing across a set of multiple symbols, delay domain multiplexing across a set of multiple cyclic shifts, code domain multiplexing, or non-orthogonal code division multiplexing.

[0039] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, the set of multiple measured channel metrics includes a signal strength metric, a spectral efficiency metric, a rank metric, or any combination thereof.

[0040] In some examples of the methods, apparatus, and non-transitory computer-readable media described herein, one or more metrics associated with mobility management for the UE include a handover command for the UE. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figures 1 to 3 An example of a wireless communication system supporting a spatial metric based mobility procedure using a multi-port mobility reference signal in accordance with one or more aspects of the present disclosure is illustrated.

[0042] Figure 4 An example of a process flow for supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is illustrated.

[0043] Figure 5 and Figure 6 A block diagram of a device supporting a spatial metric based mobility procedure using a multi-port mobility reference signal in accordance with one or more aspects of the present disclosure is shown.

[0044] Figure 7 A block diagram of a communications manager supporting spatial metric based mobility procedures using multi-port mobility reference signals is shown in accordance with one or more aspects of the present disclosure.

[0045] Figure 8 A diagram of a system including a device supporting a spatial metric based mobility procedure using a multi-port mobility reference signal is shown in accordance with one or more aspects of the present disclosure.

[0046] Fig. 9 and Fig.10 A block diagram of a device supporting a spatial metric based mobility procedure using a multi-port mobility reference signal in accordance with one or more aspects of the present disclosure is shown.

[0047] Fig.11 A block diagram of a communications manager supporting spatial metric based mobility procedures using multi-port mobility reference signals is shown in accordance with one or more aspects of the present disclosure.

[0048] Fig.12 A diagram of a system including a device supporting a spatial metric based mobility procedure using a multi-port mobility reference signal is shown in accordance with one or more aspects of the present disclosure.

[0049] Figures 13 to 17 A flow chart illustrating a method for supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0050] In some wireless communication systems, a user equipment (UE) and a network entity may perform mobility management procedures associated with beam refinement, handover of the UE between different cells or network entities, or both. In some cases, the mobility management procedures may be based on signal strength measurements of reference signals sent by the network entity to the UE. For example, the network entity may send multiple reference signals to the UE, each reference signal being associated with a corresponding beam (e.g., beam scanning). The UE may receive the reference signals and measure the signal strength of each reference signal (e.g., reference signal received power (RSRP)). Each reference signal may be associated with a corresponding cell identifier (ID) based on the network entity and a corresponding beam ID based on the beam used to send the reference signal. The UE may determine a signal strength measurement for each cell ID and each beam ID. The UE may send a report to the network entity to indicate one or more of the strongest cell and beam direction, and the network entity may perform mobility management procedures based on the indicated cell and beam (e.g., handing over the UE to the cell associated with the strongest signal strength, or switching to the beam associated with the strongest signal strength, or both). However, the reported signal strength measurements may not take into account rank information or other spatial metrics associated with the cell and beam direction (e.g., in some cases, a beam selected based on RSRP may have a relatively poor rank condition). Therefore, in some aspects, cell and beam selection based solely on signal strength measurements may reduce the throughput and reliability of communications.

[0051] The techniques, systems, and devices described herein enable a UE to receive a multi-port reference signal (e.g., a multi-port mobility reference signal) for a mobility procedure and to send a report including a vectorized channel metric (e.g., multi-dimensional information) associated with the multi-port reference signal. The multi-port reference signal may be sent to the UE simultaneously (e.g., jointly or coherently) from multiple different antenna ports. The antenna ports may be physical antenna ports each associated with a corresponding polarization. The antenna ports may be at the same antenna panel (e.g., ports associated with different polarizations) or at different antenna panels (e.g., across one or more remote radio heads (RRHs)). For each reference signal, the UE may observe a channel response (e.g., a vector or matrix) of the reference signal through multiple antenna ports.

[0052] The UE may decompose a channel response vector into multiple dimensions associated with antenna ports. The UE may measure channel metrics associated with one or more of these dimensions, such as signal strength measurements, rank information, spectral efficiency information, or any combination thereof. The UE may send a report indicating a channel measurement vector to a network entity, the channel measurement vector including measured channel metrics associated with multiple spatial dimensions. For example, the channel measurement vector may include measurements associated with transmissions from one or more of a plurality of antenna ports (e.g., any combination thereof). Thus, the network entity, the UE, or both may make mobility handover decisions (e.g., beam or cell selection) based on the reported signal strength metrics as well as spatial metrics (such as rank), which may improve the throughput and reliability of wireless communications.

[0053] In some systems (such as some cell-free multiple-input multiple-output (MIMO) systems), reference signals may be sent from multiple antenna ports associated with different cells, different beam directions, or both. For example, a multi-port mobility reference signal may be sent simultaneously (e.g., jointly) from a first antenna port at a first antenna panel associated with a first cell ID and a second antenna port at a second antenna panel associated with a second cell ID. In such cases, the UE may concatenate channel responses for reference signals associated with the first cell ID and the second cell ID. The UE may decompose the concatenated channel response into multiple dimensions and obtain measurements of channel metrics associated with each dimension. The UE may send a report to indicate a channel measurement vector that includes measured channel metrics associated with the reference signal across multiple dimensions. Thus, the UE and the network entity may utilize the multi-port mobility reference signal to perform multi-dimensional channel measurements. By making mobility management decisions for the UE based on multi-dimensional channel measurements, in addition to signal strength measurements, the device may also consider spatial metrics (such as rank information), which may improve communication reliability and throughput, as well as other advantages.

[0054] Various aspects of the present disclosure are first described in the context of a wireless communication system. Additional aspects are described with reference to a process flow. Various aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow diagrams related to a spatial metric-based mobility procedure using a multi-port mobility reference signal.

[0055] Figure 1An example of a wireless communication system 100 supporting a spatial metric-based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is illustrated. 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 according to other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

[0056] The network entities 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may include devices in different forms or with different capabilities. In various examples, the network entities 105 may be referred to as network elements, mobility elements, radio access network (RAN) nodes, or network equipment, among other nomenclature. In some examples, the network entities 105 and the UE 115 may communicate wirelessly via one or more communication links 125 (e.g., radio frequency (RF) access links). For example, the network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) within which the UE 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area within which the network entity 105 and the UE 115 may support signal communications according to one or more radio access technologies (RATs).

[0057] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile or both stationary and mobile at different times. The UEs 115 may be devices in different forms or with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices, such as Figure 1 Other UEs 115 or network entities 105 are shown.

[0058] As described herein, a node of the wireless communication system 100 (which may be referred to as a network node or a wireless node) may be a network entity 105 (e.g., any network entity described herein), a UE 115 (e.g., any UE described herein), a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, the node may be a UE 115. As another example, the node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In other aspects of this example, the first node, the second node, and the third node may be different relative to these examples. Similarly, references to UE 115, network entity 105, apparatus, device, computing system, etc. may include disclosure of UE 115, network entity 105, apparatus, device, computing system, etc. as nodes. For example, a disclosure that UE 115 is configured to receive information from network entity 105 also discloses that the first node is configured to receive information from a second node.

[0059] In some examples, the network entities 105 may communicate with the core network 130 or with each other or both. For example, the network entities 105 may communicate with the 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, the network entities 105 may communicate with each other via the backhaul communication links 120 (e.g., according to X2, Xn, or other interface protocols) directly (e.g., directly between the network entities 105) or indirectly (e.g., via the core network 130). In some examples, the network entities 105 may communicate with each other via the midhaul communication links 162 (e.g., according to the midhaul interface protocol) or the fronthaul communication links 168 (e.g., according to the fronthaul interface protocol) or any combination thereof. The backhaul communication links 120, the midhaul communication links 162, or the fronthaul communication links 168 may be or include one or more wired links (e.g., electrical links, optical fiber links), one or more wireless links (e.g., radio links, wireless optical links), etc. or various combinations thereof. UE 115 may communicate with core network 130 via communication link 155 .

[0060] One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a transceiver base station, a radio base station, an NR base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next-generation Node B, or a gigabit Node B (any of which may be referred to as a gNB), a 5G NB, a next-generation eNB (ng-eNB), a home Node B, a home evolved Node B, or other suitable terminology). In some examples, the network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, stand-alone) base station architecture, which 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 a base station 140).

[0061] In some examples, the network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) that may be configured to utilize a protocol stack that is physically or logically distributed between 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, the 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 (near RT RIC), a non-real-time RIC (non-RT RIC)), a service management and orchestration (SMO) 180 system, or any combination thereof. The RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH), a remote radio unit (RRU), or a transmit receive point (TRP). One or more components of the network entity 105 in the decomposed RAN architecture may be co-located, or one or more components of the network entity 105 may be located in distributed locations (e.g., separate physical locations). In some examples, one or more network entities 105 of the decomposed RAN architecture may be implemented as virtual units (e.g., virtual CU (VCU), virtual DU (VDU), virtual RU (VRU)).

[0062] The functional split between CU 160, DU 165, and RU 170 is flexible and can support different functions, 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 functional split of a protocol stack can be employed between CU 160 and DU 165, such that CU 160 can support one or more layers of a protocol stack and DU 165 can support one or more different layers of a protocol stack. In some examples, CU 160 can host higher protocol layer (e.g., layer 3 (L3), layer 2 (L2)) functions and signaling (e.g., radio resource control (RRC), service data adaptation protocol (SDAP), packet data convergence protocol (PDCP)). The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may 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) functions and signaling, and may each be at least partially controlled by the CU 160. Additionally or alternatively, a functional split of the protocol stack may be employed between the DU 165 and the RU 170, such that the DU 165 may support one or more layers of the protocol stack, and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or more different cells (e.g., via one or more RUs 170). In some cases, the functional split between CU 160 and DU 165 or between DU 165 and RU 170 may be within a protocol layer (e.g., some functions of a protocol layer may be performed by one of CU 160, DU 165, or RU 170, while other functions of the protocol layer are performed by a different one of CU 160, DU 165, or RU 170). CU 160 may be further functionally split into CU control plane (CU-CP) and CU user plane (CU-UP) functions. CU 160 may be connected to one or more DUs 165 via midhaul communication links 162 (e.g., F1, F1-c, F1-u), and DU 165 may be connected to one or more RUs 170 via fronthaul communication links 168 (e.g., an open fronthaul (FH) interface). In some examples, midhaul communication link 162 or fronthaul communication link 168 may be implemented based on an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 105 that communicate via such communication links.

[0063] In some wireless communication systems (e.g., wireless communication system 100), 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 nodes 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 DUs 165 or one or more RUs 170 may be controlled in part by one or more CUs 160 associated with a 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 nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120). The IAB node 104 may include an IAB mobile terminal (IAB-MT) controlled (e.g., scheduled) by a coupled IAB donor's DU 165. The IAB-MT may include an independent set of antennas for relaying communications with the UE 115, or may share the same antennas of the IAB node 104 (e.g., of the RU 170) for access via the DU 165 of the IAB node 104 (e.g., referred to as a virtual IAB-MT (vIAB-MT)). In some examples, the 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 the IAB node 104) may be configured to operate according to the techniques described herein.

[0064] For example, an access network (AN) or RAN may include an access node (e.g., an IAB donor), communications between an IAB node 104, and one or more UEs 115. The IAB donor may facilitate a connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130). That is, the IAB donor may refer to a RAN node having a wired or wireless connection to the core network 130. The IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170), wherein the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link). The IAB donor and the IAB node 104 may communicate via an F1 interface according to a protocol defining a signaling message (e.g., an F1 AP protocol). Additionally or alternatively, CU 160 may communicate with the core network via an interface (which may be an example of a portion of a backhaul link) and may communicate with other CUs 160 (e.g., CU 160 associated with an alternative IAB host) via an Xn-C interface (which may be an example of a portion of a backhaul link).

[0065] An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access for UE 115, wireless self-backhaul capabilities, etc.). The DU 165 may act as a distributed scheduling node toward child nodes associated with the IAB node 104, and the IAB-MT may act as a scheduled node toward a parent node associated with the IAB node 104. That is, an IAB donor may be referred to as a parent node that communicates with one or more child nodes (e.g., the IAB donor may relay for transmissions to UEs through one or more other IAB nodes 104). Additionally or alternatively, depending on the relay chain or configuration of the AN, the IAB node 104 may also be referred to as a parent node or child node of other IAB nodes 104. Thus, the IAB-MT entity of the IAB node 104 may provide a Uu interface for the child IAB node 104 to receive signaling from the parent IAB node 104 , and a DU interface (eg, DU 165 ) may provide a Uu interface for the parent IAB node 104 to signal to the child IAB node 104 or the UE 115 .

[0066] For example, the IAB node 104 may be referred to as a parent node supporting communications for a child IAB node or as a child node associated with an IAB donor, or both. The IAB donor may include a CU 160 having a wired or wireless connection (e.g., backhaul communication link 120) to the core network 130, and may act as a parent node of the IAB node 104. For example, the DU 165 of the IAB donor may relay transmissions to the UE 115 via the IAB node 104, or may directly signal the transmissions to the UE 115, or both. The CU 160 of the IAB donor may signal the establishment of a communication link to the IAB node 104 via the F1 interface, and the IAB node 104 may schedule transmissions (e.g., transmissions relayed from the IAB donor to the UE 115) via the DU 165. That is, data may be relayed to and from the IAB node 104 via signaling via the NR Uu interface of the MT to the IAB node 104. Communications with the IAB node 104 may be scheduled by the DU 165 of the IAB donor, and communications with the IAB node 104 may be scheduled by the DU 165 of the IAB node 104 .

[0067] In the context of the application of the techniques described herein to a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support a spatial metric-based mobility procedure using a multi-port mobility reference signal as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally or alternatively be performed by one or more components of the disaggregated RAN architecture (e.g., an IAB node 104, a DU 165, a CU 160, a RU 170, a RIC 175, a SMO 180).

[0068] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or may be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as appliances or vehicles, meters, etc.

[0069] The UE 115 described herein may be capable of communicating with various types of devices such as other UEs 115 which may sometimes act as relays, as well as network entities 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, etc. Figure 1 shown.

[0070] The UE 115 and the network entity 105 may 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" may refer to a collection of RF spectrum resources having a physical layer structure defined for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of an RF spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communications with the UE 115 using carrier aggregation or multi-carrier operation. Depending on the carrier aggregation configuration, the UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used for both frequency division duplex (FDD) and time division duplex (TDD) component carriers. Communication between the network entity 105 and other devices may refer to communication between these devices and any portion (e.g., entity, sub-entity) of the network entity 105. For example, the terms "send," "receive," or "communicate" when referring to the network entity 105 may refer to any portion of a network entity 105 (e.g., base station 140, CU 160, DU 165, RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105).

[0071] In some examples, such as in a carrier aggregation configuration, a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute RF Channel Number (EARFCN)) and may be identified according to a channel raster for discovery by UE 115. A carrier may operate in a standalone mode, in which case initial acquisition and connection may be performed by UE 115 via the carrier, or a carrier may operate in a non-standalone mode, in which case the connection is anchored using a different carrier (e.g., a different carrier of the same or different radio access technology).

[0072] The communication link 125 shown in the wireless communication system 100 may include downlink transmissions (e.g., forward link transmissions) from the network entity 105 to the UE 115, uplink transmissions (e.g., return link transmissions) from the UE 115 to the network entity 105, or both, among other transmission configurations. A carrier may carry either downlink communications or uplink communications (e.g., in an FDD mode), or may be configured to carry both downlink communications and uplink communications (e.g., in a TDD mode).

[0073] The signal waveform transmitted via the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system using MCM technology, a resource element may refer to a symbol period (e.g., the duration of a modulation symbol) and a resource of a subcarrier, in which case the symbol period and the 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 coding rate of the modulation scheme, or both), so that a relatively high number of resource elements (e.g., in the transmission duration) and a relatively high order modulation scheme may correspond to a relatively high rate of communication. Wireless communication resources may refer to a combination of RF spectrum resources, time 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.

[0074] The time interval for the network entity 105 or the UE 115 may be expressed as a multiple of a basic time unit, which may be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, for which Δf max It can represent the supported subcarrier spacing, and N f The supported discrete Fourier transform (DFT) size may be indicated. The time intervals of the communication resources may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0075] 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, the frame may be divided into subframes (e.g., in the time domain), 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 in front of each symbol period). In some wireless communication systems 100, the time slot may be further divided into a plurality of 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., N f The duration of a symbol period may depend on the subcarrier spacing or the operating frequency band.

[0076] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of a shortened TTI (sTTI)).

[0077] According to various techniques, physical channels may be multiplexed using carriers for communication. Physical control channels and physical data channels may be multiplexed for signaling via downlink carriers, for example, using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) of a physical control channel may be defined by a set of symbol periods and may extend across a system bandwidth of a carrier or a subset of that system bandwidth. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more UEs in UE 115 may monitor or search a control region to obtain control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate may 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 sets may include a common search space set configured for transmitting control information to multiple UEs 115 , and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0078] The network entity 105 may provide communication coverage via one or more cells (e.g., macro cells, small cells, hot spots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with the network entity 105 (e.g., using a carrier), and may be associated with an identifier used to distinguish adjacent cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID), or other cell identifier). In some examples, a cell may also refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) on which a logical communication entity operates. Depending on various factors such as the capabilities of the network entity 105, such cells may range from smaller areas (e.g., structures, subsets of structures) to larger areas. For example, a cell may be or may include a building, a subset of a building, or an external space between or overlapping coverage areas 110, and the like.

[0079] A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access to a UE 115 that has a service subscription with a network provider that supports the macro cell. A small cell may be associated with a lower power network entity 105 (e.g., a lower power base station 140) than a macro cell, and the small cell may operate using the same or different (e.g., licensed, unlicensed) frequency band as the macro cell. A small cell may provide unrestricted access to a UE 115 that has a service subscription with a network provider, or may provide restricted access to a UE 115 associated with a small cell (e.g., a UE 115 in a closed subscriber group (CSG), a UE 115 associated with a user in a home or office). A network entity 105 may support one or more cells, and may also use one or more component carriers to support communications via one or more cells.

[0080] In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)) that may provide access to different types of devices.

[0081] In some examples, the network entities 105 (e.g., base stations 140, RUs 170) may be mobile and thus provide communication coverage for 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 provide coverage for various coverage areas 110 using the same or different radio access technologies.

[0082] The wireless communication system 100 may support synchronous or asynchronous operation. For synchronous operation, the network entities 105 (e.g., base stations 140) may have similar frame timing, and transmissions from different network entities 105 may be approximately aligned in time. For asynchronous operation, the network entities 105 may have different frame timing, and in some examples, transmissions from different network entities 105 may not be aligned in time. The techniques described herein may be used for either synchronous operation or asynchronous operation.

[0083] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a network entity 105 (e.g., base station 140) without human intervention. In some examples, M2M communication or MTC may include communication from devices that integrate sensors or meters to measure or acquire information and relay such information to a central server or application that uses the information or presents the information to a person interacting with the application. Some UEs 115 may be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, health care monitoring, wildlife monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0084] Some UEs 115 may be configured to employ an operating mode that reduces power consumption, such as half-duplex communication (e.g., a mode that supports unidirectional communication via transmission or reception but does not transmit and receive concurrently). In some examples, half-duplex communication may be performed at a reduced peak rate. Other energy-saving techniques for UE 115 include entering a power-saving deep sleep mode when not engaged in active communications, operating using limited bandwidth (e.g., according to narrowband communications), or a combination of these techniques. For example, some UEs 115 may be configured to operate using a narrowband protocol type that is associated with a defined portion or range (e.g., a set of subcarriers or resource blocks (RBs)) within a carrier, within a guard band of a carrier, or outside a carrier.

[0085] The wireless communication system 100 may be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low-latency communication (URLLC). UE 115 may be designed to support ultra-reliable or low-latency or critical functions. Ultra-reliable communication may include private communication 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 commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.

[0086] In some examples, the UE 115 may be configured to support communication directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., according to a peer-to-peer (P2P), D2D, or sidelink protocol). In some examples, one or more UEs 115 in a group that are performing D2D communication may be within a coverage area 110 of a network entity 105 (e.g., a base station 140, a RU 170), which may support aspects of such D2D communication configured (e.g., scheduled) by the network entity 105. In some examples, one or more UEs 115 in such a group may be outside the coverage area 110 of the network entity 105, or may otherwise be unable or not configured to receive transmissions from the network entity 105. In some examples, a group of UEs 115 communicating via D2D communication may support a one-to-many (1:M) system, in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, the network entity 105 may facilitate scheduling of resources for D2D communication. In some other examples, D2D communications may be performed between UEs 115 without involving network entity 105 .

[0087] In some systems, the D2D communication link 135 can be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these items. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, vehicles in the V2X system can communicate with roadside infrastructure (such as roadside units), or communicate with the network via one or more network nodes (e.g., network entity 105, base station 140, RU 170) using vehicle-to-network (V2N) communication, or both.

[0088] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management of UE 115 served by a network entity 105 (e.g., a base station 140) associated with the core network 130. User IP packets may be delivered through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the IP service 150 of one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0089] The wireless communication system 100 may operate using one or more frequency bands that may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally speaking, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelength ranges from about 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 may be sufficient to penetrate structures so that macro cells provide services to UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using lower frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0090] The wireless communication system 100 may also operate using a super high frequency (SHF) region (also known as a centimeter band) that may be in the range of 3 GHz to 30 GHz or an extremely high frequency (EHF) region (e.g., 30 GHz to 300 GHz) (also known as a millimeter band) using a spectrum. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between UE 115 and network entity 105 (e.g., base station 140, RU 170), and the EHF antenna of the corresponding device may be smaller and closer than the UHF antenna. In some examples, such technology may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be affected by greater attenuation and shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0091] The wireless communication system 100 can utilize licensed and unlicensed RF spectrum bands. For example, the wireless communication system 100 can use unlicensed bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band) to adopt License Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology. When operating using unlicensed RF spectrum bands, devices such as network entity 105 and UE 115 can use carrier sensing for conflict detection and avoidance. In some examples, operations using unlicensed bands can be based on carrier aggregation configuration (e.g., LAA) in combination with component carriers operating using licensed bands. Operations using unlicensed spectrum can include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, and the like.

[0092] The 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 technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the network entity 105 or UE 115 may be located in one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with the network entity 105 may be located at different geographical locations. The network entity 105 may include an antenna array having a collection of multiple rows and columns of antenna ports that the network entity 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support RF beamforming for signals sent via the antenna ports.

[0093] The network entity 105 or UE 115 may use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by sending or receiving multiple signals via different spatial layers. Such technology may be referred to as spatial multiplexing. Multiple signals may be, for example, sent by a transmitting device via different antennas or different combinations of antennas. Similarly, multiple signals may be received by a receiving device via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technologies include: single-user MIMO (SU-MIMO), in which multiple spatial layers are sent to the same receiving device; and multi-user MIMO (MU-MIMO), in which multiple spatial layers are sent to multiple devices.

[0094] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or direct an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals conveyed via antenna elements of an antenna array so that some signals propagating along a particular direction relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals conveyed via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each of these antenna elements may be defined by a set of beamforming weights associated with a particular direction (e.g., relative to the antenna array of the transmitting device or the receiving device or relative to some other direction).

[0095] The network entity 105 or UE 115 may use beam scanning techniques as part of a beamforming operation. For example, the network entity 105 (e.g., base station 140, RU 170) may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be sent multiple times by the network entity 105 along different directions. For example, the network entity 105 may send signals according to different sets of beamforming weights associated with different transmission directions. Transmission along different beam directions may be used to identify (e.g., by a transmitting device (such as network entity 105), or by a receiving device (such as UE 115)) the beam direction for later transmission or reception by the network entity 105.

[0096] Some signals, such as data signals associated with a particular receiving device, may be sent by a sending device (e.g., sending network entity 105, sending UE 115) along a single beam direction (e.g., a direction associated with a receiving device (such as receiving network entity 105 or receiving UE 115)). In some examples, the beam direction associated with the transmission along the single beam direction may be determined based on signals sent along one or more beam directions. For example, UE 115 may receive one or more of the signals sent by network entity 105 along different directions, and may report to network entity 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0097] In some examples, transmission by a device (e.g., by network entity 105 or UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from network entity 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more subbands. Network entity 105 may send a reference signal (e.g., a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS)), which may be precoded or non-precoded. UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel codebook, a linear combination codebook, a port selection codebook). Although these techniques are described with reference to signals sent along one or more directions by a network entity 105 (e.g., base station 140, RU 170), UE 115 may use similar techniques to send signals multiple times along different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115), or to send signals along a single direction (e.g., to send data to a receiving device).

[0098] A receiving device (e.g., UE 115) may perform receiving operations according to multiple receiving configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a receiving device (e.g., network entity 105). For example, the receiving device may perform reception according to multiple receiving directions by: receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receiving beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or processing received signals according to different receiving beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receiving configurations or receiving directions. In some examples, the receiving device may use a single receiving configuration to receive along a single beam direction (e.g., when receiving a data signal). A single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0099] UE 115 and network entity 105 may support retransmission of data to increase the likelihood that the data is successfully received. Hybrid automatic repeat request (HARQ) feedback is a technique for increasing the likelihood of correctly receiving data via a communication link (e.g., communication link 125, D2D communication link 135). HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve the throughput at the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific time slot for data received in a previous symbol in the time slot. In some other examples, the device may provide HARQ feedback in a subsequent time slot or according to some other time interval.

[0100] In some examples of the wireless communication system 100, the network entity 105 and the UE 115 may exchange reference signals and perform mobility management procedures for the UE 115 based on measurements of the reference signals. The mobility management procedures may include switching the cell via which the UE 115 is connected (e.g., handover), switching the beam for the UE 115 (e.g., beam refinement), or other mobility management procedures. As described herein, as part of the mobility management procedures, the network entity 105 and the UE 115 may exchange multi-port reference signals. The UE 115 may measure the multi-port reference signals and report channel measurements across multiple spatial dimensions, which may improve the reliability of such mobility management procedures. The UE 115 may receive reference signals (e.g., multi-port reference signals) associated with multiple antenna ports from one or more network entities 105. The UE 115 may measure a multi-dimensional channel response of the reference signal. The multi-dimensional channel response may be associated with a plurality of measured channel metrics corresponding to the plurality of antenna ports. In some aspects, the UE 115 may measure a channel response of a reference signal received from each antenna port, and the UE 115 may concatenate the channel responses to obtain a multi-dimensional channel response. The UE 115 may decompose the multi-dimensional channel response into multiple dimensions.

[0101] The UE 115 may send a report including a channel measurement vector to the network entity 105. The channel measurement vector may indicate a plurality of measured channel metrics for one or more dimensions of a channel response based on decomposing a multi-dimensional channel response. The network entity 105 may receive the channel measurement vector and determine one or more mobility management decisions (e.g., cell selection, beam selection) for the UE 115 based on the channel measurements across multiple spatial dimensions. Additionally or alternatively, the UE 115 may autonomously determine a mobility management decision based on the channel measurement vector. By performing mobility management procedures based on channel measurements as well as spatial information, the network entity 105 and the UE 115 may improve reliability and throughput of communications.

[0102] Figure 2 An example of a wireless communication system 200 supporting a spatial metric-based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is illustrated. The wireless communication system 200 may be implemented as shown in FIG. Figure 1 Various aspects of the wireless communication system 100 described herein may be implemented by various aspects of the wireless communication system. For example, the wireless communication system 200 may include a network entity 105-a and a UE 115-a, which may be represented as shown in FIG. Figure 1 2. An example of a network entity 105 and a UE 115. The network entity 105-a may be within the geographic coverage area 110-a and in communication with the UE 115-a via a communication link 210. In some aspects, the network entity 105-a, the UE 115-a, or both may be associated with (e.g., include, be deployed with, or be coupled with) an antenna panel 205 for wireless communication.

[0103] The network entity 105-a can use the antenna panel 205-a to support MIMO communications. The antenna panel 205-a may include multiple antenna ports 220, which may be referred to as antenna arrays, antenna elements, antenna assemblies, or antennas. In some aspects, the number of antenna ports 220 in the antenna panel 205-a may be relatively high, and the MIMO communication may be referred to as massive MIMO (mMIMO). Antenna ports or elements within the same antenna panel 205-a may be associated with relatively high correlations. However, the antenna panel 205-a may support at least two degrees or polarizations of the channel. For example, the antenna of the antenna panel 205-a may be polarized at least in the vertical direction and the horizontal direction. A wireless channel associated with a first polarization may be independent of (e.g., separate from) a wireless channel associated with a second polarization.

[0104] The antenna ports 220 as described herein may refer to polarization-specific antenna ports 220. For example, the same physical antenna panel or array may include two or more antenna ports 220, each associated with a respective polarization. Figure 2 In the example of , the solid diagonal lines in the antenna panel 205-a can represent antenna ports 220-a associated with a first polarization, and the dashed diagonal lines in the antenna panel 205-a can represent antenna ports 220-b associated with a second polarization. The antenna panel 205-b at the UE 115-a can represent an example of an antenna panel 205-a at the network entity 105-a. For example, the antenna panel 205-b may include one or more polarization-specific antenna ports 220, as described and illustrated with reference to the antenna panel 205-a. In some aspects, the antenna panel 205-b may include fewer antenna ports, or may be relatively smaller in size than the antenna panel 205-a.

[0105] The network entity 105-a may perform beam scanning over a set of beams 215. For example, the network entity 105-a may send a reference signal 225 to the UE 115-a via the communication link 210 using one or more different beams 215 for each reference signal 225. The UE 115-a may receive the reference signal 225 using different receive beams 215 over time. In some cases, the UE 115-a may measure the signal strength (e.g., RSRP or reference signal received quality (RSRQ)) of the reference signal 225. The UE 115-a and the network entity 105-a may make mobility decisions based on the reference signal 225, such as beam selection, cell selection, handover, or other mobility decisions.

[0106] In some mobility procedures, the network entity 105-a may support a single antenna port 220 at a time in a single beam direction. For example, the network entity 105-a may perform beamforming in a TDM manner, scanning through a set of beams 215 across different time intervals. In some aspects, the network entity 105-a may use antenna port 220-a and antenna port 220-b simultaneously to generate each beam 215, so that the UE 115-a can receive or identify the combined channel, but the UE 115-a may not decrypt the two separate channels associated with the separate antenna ports 220-a and 220-b. Additionally or alternatively, the network entity 105-a may perform beamforming using only one of the antenna ports 220-a or 220-b. In either case, spatial information across the two antenna ports 220-a and 220-b may be lost.

[0107] In such cases, each reference signal may be associated with a single corresponding beam ID and a single corresponding cell ID. UE 115-a may report measured signal strengths for each beam and cell. UE 115-a, network entity 105-a, or both may select the cell or beam direction associated with the strongest or maximum signal strength measurement. However, if the reference signals 225 for mobility are each associated with a single port at a given time, the signal strength measurements used by network entity 105-a and UE 115-a for mobility decisions may not indicate rank, spectral efficiency, and other spatial information. In some aspects, if UE 115-a selects a cell or beam direction based on a maximum RSRP measurement (e.g., and without considering spatial information), the selected beam direction may be associated with a relatively poor rank condition, which may reduce the throughput of wireless communications at UE 115-a.

[0108] The techniques, systems, and devices described herein enable multi-port reference signal transmission to support the use of spatial information for mobility procedures, which can improve the efficiency and reliability of mobility procedures, among other advantages. For example, because it may be easier to have polarization arrays from the same antenna panel 205 be independently beamformed (e.g., using separate RF chains), the network entity 105-a can transmit a reference signal 225 using two independent beams 215 generated simultaneously. The UE 115-a can receive the reference signal 225 and determine or observe two separate channels associated with the reference signal 225. For example, the UE 115-a can observe a first channel associated with a first polarization or antenna port 220-a and a second channel associated with a second polarization or antenna port 220-b.

[0109] The network entity 105-a may use one or more multiplexing techniques to send the multi-port reference signal 225. For example, the network entity 105-a may use FDM across one or more frequency combs (e.g., subchannels) to send the multi-port reference signal 225, or the network entity 105-a may use TDM across one or more symbols to send the multi-port reference signal 225. Additionally or alternatively, the network entity 105-a may use delay domain multiplexing across one or more cyclic shifts, code domain multiplexing over multiple symbols (e.g., Walsh code or discrete Fourier transform (DFT) based spreading), or non-orthogonal code division multiplexing to send the multi-port reference signal. The multi-port reference signal 225 may be a synchronization signal block (SSB) (e.g., a multi-port SSB), a tracking reference signal (TRS), a CSI-RS, or any combination thereof.

[0110] The UE 115-a may receive multiple multi-port reference signals 225. The UE 115-a may search the multi-port reference signals for corresponding cell IDs and corresponding beam IDs. For each cell ID and beam ID, the UE 115-a may then search multiple antenna ports 220 (e.g., spatial dimensions). For a polarized antenna panel 205, each multi-port reference signal 225 may be associated with two or more antenna ports 220: one antenna port 220 for each polarization. The UE 115-a may observe a channel response associated with each multi-port reference signal 225. A single-port reference signal 225 may be associated with a scalar channel response (such as RSRP) for mobility measurements. However, the multi-port reference signals 225 may each be associated with a channel response vector (e.g., H) or a channel response matrix on multiple antenna ports 220.

[0111] UE 115-a may perform a transform on the observed channel response vector or matrix. The transform may be a singular value decomposition (SVD), regularized zero forcing (RZF), or some other form of transform or decomposition of the channel response. The transform may decompose the channel response into independent dimensions (e.g., orthogonalized dimensions), and each dimension may be associated with a corresponding set of one or more channel metrics (e.g., RSRP, RSRQ, signal to interference plus noise ratio (SINR), or some other metric). UE 115-a may measure channel metrics in multiple dimensions based on reference signal 225. In Figure 2 In the example of , each reference signal 225, and therefore each channel response, can be associated with multiple spatial dimensions (e.g., polarization; antenna port 220) and corresponding cell IDs and beam IDs (e.g., cell and beam ID pairs).

[0112] In some aspects, the UE 115-a may select one or more different subsets of antenna ports 220 in a plurality of antenna ports 220, and the UE 115-a may perform a transformation based on the selected subset of antenna ports 220. The UE 115-a may determine whether the network entity 105-a utilizes beamforming (e.g., beam combining) across antenna ports 220, and may perform a channel transformation based on whether beamforming is utilized. In some aspects, the UE 115-a may measure an interference covariance structure, which may be filtered over time and frequency. The UE 115-a may measure or generate an interference covariance structure based on a multi-port reference signal 225 for mobility measurements, based on one or more reference signals for interference measurements, or based on both. The UE 115-a may whiten a measured channel response vector based on the interference covariance structure.

[0113] The UE 115-a may send a vectored measurement report 230 for each cell ID and each beam ID to report the measured channel metrics in each dimension. The vectored measurement report 230 may include a channel measurement vector, which may be a vector of measured channel metric values. In some aspects, the number of entries in the channel measurement vector may be the same as the number of antenna ports 220 associated with the corresponding multi-port reference signal 225, and each entry may represent a measured channel metric for the corresponding antenna port 220 or a combination of multiple antenna ports 220. Additionally or alternatively, one or more entries of the channel measurement vector may indicate measured channel metrics for more than one antenna port 220, or more than one entry in the channel measurement vector may be mapped to the same antenna port 220.

[0114] exist Figure 2 In an example of , the network entity 105-a may send a multi-port reference signal 225 to the UE 115-a using a first polarization associated with the antenna port 220-a and a second polarization associated with the antenna port 220-b. The UE 115-a may observe a channel response vector H, which includes at least two entries (e.g., spatial dimensions) associated with the two antenna ports 220. The UE 115-a may decompose the channel response vector into two independent dimensions and may measure a channel metric associated with each dimension. The UE 115-a may send a vectorized measurement report 230 to the network entity 105-a based on the measured channel metric. The vectorized measurement report 230 may include a first measured channel metric associated with the first antenna port 220-a and a second measured channel metric associated with the second antenna port 220-b. The channel metric may include a signal strength metric (e.g., RSRP, RSRQ, SINR, or other signal strength metric), a spectral efficiency metric, a rank metric, or any combination thereof.

[0115] In some aspects, the UE 115-a may send a vectorized measurement report 230 indicating a corresponding vector of channel measurements for each reference signal 225 (e.g., each beam ID and each cell ID). Additionally or alternatively, the UE 115-a may report a vectorized measurement report 230 for a subset of beam IDs and cell IDs associated with the strongest (e.g., best) channel measurements. For example, the UE 115-a may average the values ​​of the measured channel metrics in a given channel measurement vector, and the UE 115-a may compare the averages across different beams and cell IDs. The UE 115-a may select a subset of beams and cell IDs associated with the largest averages and send a vectorized measurement report 230 for those values. The UE 115-a may suppress sending reports for other cells and beam IDs to reduce overhead and improve efficiency. In some aspects, the UE 115-a may send a single report including multiple channel measurement vectors.

[0116] Thus, the vectored measurement report 230 may indicate spatial information associated with the multi-port reference signal 225 for mobility. The network entity 105-a may utilize the spatial information and other measured channel metrics indicated via the vectored measurement report 230 to determine one or more mobility metrics for the UE 115-a. In some aspects, in addition to the spatial information indicated via the vectored measurement report 230, the network entity 105-a may also utilize one or more other parameters (such as cell load, interference scenario, etc.) to determine the mobility metrics for the UE 115-a. The network entity 105-a may determine a handover decision for the UE 115-a, a beam 215 for communication with the UE 115-a, or both based on the information. The network entity 105-a may send signaling or a message to the UE 115-a to indicate the mobility information (e.g., a handover command, a beam 315).

[0117] Additionally or alternatively, in some aspects, the UE 115-a may be empowered to autonomously determine a mobility metric or a mobility decision, or both, based on multi-dimensional measurements obtained by the UE 115-a based on a multi-port reference signal 225 across multiple cells and multiple beams. For example, the UE 115-a may determine a handover decision, a beam 215 to use for communication, or both.

[0118] In some aspects, the UE 115-a may be equipped with an antenna panel 205-b that may include multiple antenna ports 220, as described and illustrated with respect to the antenna panel 205-a. In some aspects, the UE 115-a may send one or more multi-port reference signals 225 to the network entity 105-a. In such cases, the network entity 105-a may measure the multi-port reference signals 225 and generate a multi-dimensional channel measurement vector. The network entity 105-a may utilize the multi-dimensional channel measurement vector in the uplink to make mobility management decisions for the UE 115-a. In such cases, the uplink multi-port mobility reference signal 225 may be multiplexed across time, space, and frequency in a manner similar to the downlink multi-port mobility reference signal 225 described herein.

[0119] Thus, the UE 115-a, the network entity 105-a, or both can utilize the multi-dimensional channel measurements included in the vectored measurement report 230 to consider signal strength metrics as well as spatial information (such as rank) when determining mobility management metrics, which can improve the throughput and reliability of wireless communications, among other advantages.

[0120] Figure 3 An example of a wireless communication system 300 supporting a spatial metric-based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is illustrated. The wireless communication system 300 may be implemented as shown in FIG. Figure 1 Aspects of the wireless communication system 100 described herein may be implemented by the wireless communication system 100. For example, the wireless communication system 300 may include a UE 115-b, a network entity 105-b, and a network entity 105-c, which may be represented as shown in FIG. Figure 1 and Figure 2 Examples of UE 115 and network entity 105 are described. Network entity 105-b may be associated with cell 320-a, and network entity 105-c may be associated with cell 320-b. In some aspects, each of cells 320-a and 320-b may be associated with a respective cell ID.

[0121] In some aspects, the network entities 105-b and 105-c may be deployed with or coupled to respective antenna panels 305 (e.g., antenna panels 305-a and 305-b), which may represent reference Figure 2An example of the antenna panel 205 is described. The UE 115-b, the network entity 105-b, and the network entity 105-c may each generate a respective set of beams 315 for transmitting and receiving wireless communications. The network entity 105-b may communicate with the UE 115-b via a respective communication link 310-a within the cell 320-a, and the network entity 105-c may communicate with the UE 115-b via a respective communication link 310-b within the cell 320-b.

[0122] In some aspects, the wireless communication system 300 may support cell-free MIMO, which may be referred to as distributed mMIMO or MIMO from multiple antenna panels. That is, the UE 115-b may not be limited to transmitting to or receiving from a single cell 320. Multiple network entities 105 associated with multiple different cells 320 may transmit to the UE 115-b simultaneously. The network entities 105-b and 105-c may use antenna panels 305-a and 305-b, respectively, to support such distributed mMIMO communications. The antenna panels 305-a and 305-b may each include multiple antenna ports, which may be polarization specific, as described in reference to FIG. Figure 2 In some aspects, the network entities 105-b and 105-c may represent examples of RRHs or TRPs or some other node or component of the network entity 105. The network entities 105-b and 105-c may communicate with each other via a backhaul communication link ( Figure 3 (not shown) for communication.

[0123] The techniques described herein enable a UE 115-b to perform measurements of mobility management procedures across multiple cells 320, across multiple beams 315, or across both. For example, during distributed mMIMO communications, a UE 115-b may receive a joint transmission associated with two or more cell IDs (e.g., multiple RRHs may simultaneously transmit a multi-port reference signal 325), or a UE 115-b may receive two mobility reference signals 325 that are believed to be possibly coherently jointly transmitted (e.g., beamformed) to the UE 115-b. Figure 3In the example of , the network entity 105-b may send a reference signal 325 for mobility measurement to the UE 115-b via the communication link 310-a. The reference signal 325 may be associated with a first cell ID of the cell 320-a associated with the network entity 105-b. The network entity 105-c may similarly send the reference signal 325 to the UE 115-b via the communication link 310-b at the same time as the transmission performed by the network entity 105-b (e.g., via a joint transmission). The reference signal 325 sent by the network entity 105-c may be associated with a second cell ID of the cell 320-b associated with the network entity 105-c. In some aspects, the network entities 105-b and 105-c may utilize two or more antenna ports (e.g., two or more polarizations) of each antenna panel 305-a and 305-b to send the reference signal 325, such as the reference signal 325. Figure 2 Additionally or alternatively, in the entire cell-free MIMO system, there may be more than two antenna ports across multiple RRHs, TRPs, or both.

[0124] UE 115-b may observe a multi-dimensional channel response associated with each of reference signals 325 transmitted by each of network entities 105-b and 105-c. For example, transmission by network entity 105-b may generate a first channel response vector {H,V}, where H may represent a first polarization of antenna panel 305-a (e.g., horizontal polarization), and V may represent a second polarization of antenna panel 305-a (e.g., vertical polarization). Transmission by network entity 105-c may generate a second channel response vector {H,V}, where H may represent a first polarization of antenna panel 305-b (e.g., horizontal polarization), and V may represent a second polarization of antenna panel 305-b (e.g., vertical polarization). Thus, a first cell ID (e.g., CID1, which may be a TRP ID) may be associated with a first {H,V} response, and a second cell ID (e.g., CID2, which may be a TRP ID) may be associated with a second {H,V} response. These channel responses may be concatenated based on the joint transmission by network entities 105-b and 105-c. The concatenated channel responses may be viewed by UE 115-b as four independent ports (e.g., CID1H, CID1V, CID2H, CID2V). The equivalent channel considered may have joint beamforming from two antenna panels 305 to two polarization arrays of UE 115-b.

[0125] In some aspects, the UE 115-b may additionally or alternatively receive reference signals 325 that may be considered jointly across multiple beam IDs. For example, the network entity 105-b may utilize multiple different antenna ports to generate different beam combinations. The network entity 105-b may send the multi-port reference signal 325 to the UE 115-b by multiplexing the multi-port reference signal 325 across multiple beams 315 (e.g., FDM, TDM, code division multiplexing (CDM), non-orthogonal code domain multiplexing, or some other type of multiplexing). In such cases, the multi-port reference signal 325 may be associated with multiple different beam IDs.

[0126] The joint transmission may be a coherent joint transmission or an incoherent joint transmission. In some aspects, the network entity 105-b, the network entity 105-c, or some other network entity 105 may send signaling to the UE 115-b to indicate which cell IDs, beam IDs, or both may be combined for coherent joint transmission and / or incoherent joint transmission and corresponding joint multi-port mobility measurements. The signaling may be, for example, a system information block (SIB), a master information block (MIB), or some other control signaling indicating combinable cells and beam IDs. In some aspects, the network entity 105 may determine which cell IDs or beam IDs may be combined or combined for coherent or incoherent transmission based on the capabilities of the network entity 105. For example, the reference signal 325 generated from the same antenna panel 305 having a relatively limited number of radio frequency (RF) chains may not be independent and may not be considered as multiple ports, but may be considered as multiple beam directions. That is, a single antenna panel 305 may not support multiple joint transmissions using different beams 315 at the same time.

[0127] Additionally or alternatively, one or more rules may be defined (e.g., configured or predefined in a standard) indicating a set of cell IDs and beam IDs that may be combined for coherent or incoherent joint transmission and multi-port mobility measurements. In some aspects, these rules may be based on the value or structure of the ID. For example, the rules may specify that IDs with the same first or last digit may be combinable, or that IDs above a threshold may be combinable, or some other rule related to the structure or value of the ID. In some aspects, the one or more rules may indicate a subset of the total number of cell IDs and beam IDs that may be assumed to be independently generated and support coherent or incoherent joint transmission. In some aspects (e.g., for a cell-free mMIMO system), the cell IDs and beam IDs may be classified or configured into two (or more) groups: a first group associated with cells and beam IDs that support coherent joint processing and a second group associated with cells and beam IDs that support incoherent joint processing.

[0128] In some aspects, if a transmission in the same symbol (e.g., at a given time) is associated with two or more different cell IDs or two or more different beam IDs, or both, and the transmission is multiplexed in one or more multiplexing domains other than time (e.g., the transmission is not TDMed), the UE 115-b may assume that the two or more different cell and / or beam IDs are independent and may support simultaneous or joint transmission (e.g., coherent or non-coherent). In other words, in some aspects, the two or more IDs may be considered to be related, and if the transmission is TDMed across cell IDs or beam IDs, joint transmission to the UE 115 may not be supported. Other multiplexing techniques that may indicate independent IDs may include, for example, FDM, cyclic shift multiplexing, CDM, etc. In some aspects, there may be a rule or set of rules associated with a combination of one or more of these multiplexing techniques that indicates support for coherent or non-coherent joint transmission.

[0129] As described herein, UE 115-b may measure a cascaded channel response matrix or vector and report vectorized measurements for mobility management procedures. In some aspects, UE 115-b may perform a transformation to decompose the cascaded channel response into multiple independent dimensions. Each dimension may be associated with a corresponding channel metric measurement (such as a corresponding signal strength measurement). UE 115-b may additionally or alternatively measure the rank or spectral efficiency of a channel across multiple dimensions. UE 115-b may send a vectorized measurement report 330 to network entity 105-b, network entity 105-c, or both to indicate channel measurements across multiple dimensions. When UE 115-b obtains multidimensional channel measurements, UE 115-b may indicate which cells and beam IDs support joint processing. For example, if a given multi-port combination supports coherent joint processing, UE 115-b may perform a transformation (such as SVD) on the channel response to obtain a signal strength metric, spectral efficiency information, rank information, or any combination thereof. If coherent joint processing is not supported, the UE 115-b may consider a single dimension of the channel response (e.g., channel port selection or non-coherent combining such as power or RSRP combining) when obtaining channel measurements.

[0130] The vectorized measurement report 330 may indicate a reference Figure 2 An example of a vectored measurement report 230 is described. Figure 3In the example of , the channel measurement vector indicated via the vectored measurement report 330 may be associated with one or more different cell IDs, one or more different beam IDs, or both. In some aspects, the UE 115-b may estimate or measure expected ranks or adjustments associated with different combinations of beams and cell IDs, and the vectored measurement report 330 may indicate the expected rank or adjustment information. Thus, the vectored measurement report 330 may indicate channel information across multiple different spatial dimensions (e.g., a combination of antenna ports and beams 315).

[0131] In some aspects, the wireless communication system 300 may support multi-dimensional channel metric reporting for a threshold number of dimensions. That is, if the UE 115-b receives joint transmissions from a relatively large number of RRHs, the channel response may be relatively large, and reporting the channel measurement may be associated with a relatively high overhead. Thus, the UE 115-b may adjust the channel dimensions (e.g., intrinsic dimensions) based on the threshold number before reporting the channel measurement. For example, if the UE 115-b observes a channel response combined by multiple beams 315 (e.g., four beams 315) and multiple dimensions (e.g., eight dimensions or antenna ports), and the threshold number is two (e.g., supporting up to two intrinsic dimensions), the UE 115-b may report signal strength measurements and associated beams and cell IDs for the two dimensions associated with the strongest channel metric measurements.

[0132] Thus, UE 115-b, network entity 105-b, and network entity 105-c may support multi-port mobility reference signals 325 that may be used for measurements across spatial dimensions. UE 115-b may report a multi-dimensional channel measurement vector to one or both of network entities 105-b and 105-c. Network entities 105-b and 105-c may determine one or more mobility metrics (e.g., handover command, beam 315, etc.) for UE 115-b based on the multi-dimensional channel measurement vector. Additionally or alternatively, UE 115-b may determine a mobility metric. In some aspects, UE 115-b may be equipped with an antenna panel 305 ( Figure 3 325). In such a case, UE 115-b may send an uplink multi-port reference signal 325 to network entity 105-b, network entity 105-c, or both. Network entity 105 may receive multi-port reference signal 325 and generate a multi-dimensional channel measurement vector based on reference signal 325, as described herein. In such a case, network entity 105 may determine a mobility metric based on determining the channel measurement vector.

[0133] By utilizing channel measurements across spatial dimensions, devices can consider channel strength and other spatial information when performing mobility procedures, which can improve throughput and reliability of communications, among other benefits.

[0134] Figure 4 An example of a process flow 400 for supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is illustrated. The process flow 400 may be implemented as described in reference to Figures 1 to 3 Aspects of the wireless communication systems 100, 200, and 300 described herein may be implemented by or in accordance with the present invention. For example, the process flow 400 illustrates communication between a UE 115-c and a network entity 105-d. The UE 115-c and the network entity 105-d may be represented as shown in FIG. Figures 1 to 3 Aspects of the corresponding apparatus described. In some aspects, the UE 115-c and the network entity 105-d may utilize a multi-port mobility reference signal to facilitate a spatial metric-based mobility management procedure for the UE 115-c, as described herein.

[0135] In the following description of process flow 400, operations between UE 115-c and network entity 105-d may be performed in a different order or at a different time. Some operations may also be excluded from process flow 400, or other operations may be added. Although UE 115-c and network entity 105-d are shown as performing operations of process flow 400, some aspects of some operations may also be performed by one or more other wireless devices.

[0136] At 405, the network entity 105-d may send a reference signal to the UE 115-c. The reference signal may be associated with multiple antenna ports. For example, the reference signal may be sent from multiple antenna ports of the network entity 105-d or distributed across one or more network entities 105-d (e.g., distributed across TRPs, RRHs, or some other node or component of the network). The multiple antenna ports may be associated with the same cell ID, the same beam ID, different cell IDs, different beam IDs, or any combination thereof. In some aspects of this document, the reference signal may be referred to as a multi-port mobility reference signal. The reference signal may be an SSB, a TRS, a CSI-RS, or some other type of reference signal. In some aspects, the network entity 105-d may send a reference signal across multiple antenna ports using FDM, TDM, delay domain multiplexing, CDM, or any combination thereof, and the UE 115-c may receive the reference signal associated with the multiple antenna ports.

[0137] At 410, the UE 115-c may measure a multidimensional channel response based on a reference signal. The multidimensional channel response may be associated with a plurality of measured channel metrics corresponding to a plurality of antenna ports. In some aspects, the UE 115-c may separately measure the corresponding channel responses of the reference signal associated with each cell ID and each beam ID (e.g., if the reference signal is associated with a plurality of cell IDs and / or a plurality of beam IDs), and the UE 115-c may cascade the plurality of channel responses to obtain the multidimensional channel response. In some aspects, the UE 115-c may perform a transform on the multidimensional channel response to decompose the multidimensional channel response and obtain two or more dimensions of the multidimensional channel response. The UE 115-c may identify a measured channel metric associated with each dimension of the multidimensional channel response. The UE 115-c may measure the channel metric based on the decomposed channel response, or the decomposition of the multidimensional channel response may indicate the measured channel metric.

[0138] At 415, UE 115-c may send a report including a channel measurement vector indicating a plurality of measured channel metrics for one or more dimensions of a multi-dimensional channel response. If reference signals are received from multiple antenna ports associated with the same beam ID and cell ID (e.g., from the same antenna panel of network entity 105-d), the measured channel metrics of the channel measurement vector may be associated with the same beam ID and cell ID. If reference signals are received from multiple antenna ports associated with two or more cell IDs, two or more beam IDs, or both (e.g., jointly transmitted across multiple antenna panels, such as reference panels), the measured channel metrics of the channel measurement vector may be associated with the same beam ID and cell ID. Figure 3 As described above), the measured channel metrics of the channel measurement vector may be associated with two or more cell IDs, two or more beam IDs, or both. In some aspects, two or more cell IDs, two or more beam IDs, or both may be associated with favorable (e.g., optimal) RSRP, channel strength, total channel capacity, etc.

[0139] In some aspects, each element of the channel measurement vector may be a measured channel metric that may be associated with a corresponding antenna port in a plurality of antenna ports (e.g., a one-to-one mapping). For example, the UE 115-c may report at least one measured channel metric for each antenna port. Additionally or alternatively, each element of the channel measurement vector may be a measured channel metric that may be associated with a corresponding set of two or more antenna ports in a plurality of antenna ports. For example, the UE 115-c may report measured channel metrics for one or more combinations or groupings of antenna ports (e.g., an average channel metric measurement across the ports). The measured channel metric may be a signal strength metric, a spectral efficiency metric, a rank metric, or any combination thereof.

[0140] At 420, in some aspects, the network entity 105-d may send a message to the UE 115-c. The message may indicate one or more metrics associated with mobility management for the UE 115-c based on a report indicating a channel measurement vector. For example, the network entity 105-d may determine whether to initiate a handover procedure for the UE 115-c, whether to update a beam used for communications by the UE 115-c, or some other mobility management decision for the UE 115-c based on the multi-dimensional information indicated via the channel measurement vector and one or more other parameters associated with communications in a cell supported by the network entity 105-d. The network entity 105-d may indicate the mobility management decision to the UE 115-c via the message.

[0141] In some other aspects, the UE 115-c may be configured to autonomously make one or more mobility management decisions, such as a handover request, beam refinement, or both, based on the channel measurement vector. In such cases, the UE 115-c may perform a mobility management procedure. The UE 115-c may send a message to the network entity 105-d to indicate the mobility management decision made by the UE 115-c.

[0142] By utilizing the multi-port mobility reference signal to perform channel measurements, the UE 115-c can generate and report a channel measurement vector that includes channel measurement information across multiple spatial dimensions. By utilizing spatial information to perform mobility management procedures, the network entity 105-d, the UE 115-c, or both can improve the efficiency and reliability of the mobility management procedures.

[0143] Figure 5 A block diagram 500 of a device 505 supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The device 505 may be an example of aspects of a UE 115 as described herein. The device 505 may include a receiver 510, a transmitter 515, and a communication manager 520. The device 505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0144] The receiver 510 may provide means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to a spatial metric-based mobility procedure using a multi-port mobility reference signal). The information may be communicated to other components of the device 505. The receiver 510 may utilize a single antenna or a collection of multiple antennas.

[0145] The transmitter 515 may provide means for transmitting signals generated by other components of the device 505. For example, the transmitter 515 may transmit information associated with various information channels (e.g., control channels, data channels, information channels related to a spatial metric-based mobility procedure using a multi-port mobility reference signal), such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 515 may be co-located with the receiver 510 in a transceiver module. The transmitter 515 may utilize a single antenna or a collection of multiple antennas.

[0146] The communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of the spatial metric based mobility procedures using multi-port mobility reference signals as described herein. For example, the communication manager 520, the receiver 510, the transmitter 515, or various combinations thereof, or components thereof, may support methods for performing one or more of the functions described herein.

[0147] In some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a digital signal processor (DSP), a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof that is configured to or otherwise supports components for performing the functions described in the present disclosure. In some examples, the processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0148] Additionally or alternatively, in some examples, the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 520, the receiver 510, the transmitter 515, or various combinations or components thereof may be performed by a general purpose processor (e.g., configured as or otherwise supporting components for performing the functions described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0149] In some examples, communication manager 520 can be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with receiver 510, transmitter 515, or both. For example, communication manager 520 can receive information from receiver 510, transmit information to transmitter 515, or be integrated with receiver 510, transmitter 515, or both to obtain information, output information, or perform various other operations as described herein.

[0150] According to examples as disclosed herein, the communication manager 520 may support wireless communications at a UE. For example, the communication manager 520 may be configured to or otherwise support a component for receiving a reference signal associated with a set of multiple antenna ports. The communication manager 520 may be configured to or otherwise support a component for measuring a multi-dimensional channel response based on receiving the reference signal, the multi-dimensional channel response being associated with a set of multiple measured channel metrics corresponding to the set of multiple antenna ports. The communication manager 520 may be configured to or otherwise support a component for sending a report including a channel measurement vector based on measuring the multi-dimensional channel response, the channel measurement vector indicating a set of multiple measured channel metrics for one or more dimensions of the multi-dimensional channel response.

[0151] By including or configuring a communication manager 520 according to the examples described herein, the device 505 (e.g., a processor controlling or otherwise coupled to the receiver 510, the transmitter 515, the communication manager 520, or a combination thereof) may support techniques for reducing processing, reducing power consumption, and more efficiently utilizing communication resources, among other advantages.

[0152] Figure 6 A block diagram 600 of a device 605 supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The device 605 may be an example of aspects of the device 505 or UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0153] The receiver 610 may provide means for receiving information (such as packets, user data, control information, or any combination thereof) associated with various information channels (e.g., control channels, data channels, information channels related to a spatial metric-based mobility procedure using a multi-port mobility reference signal). The information may be communicated to other components of the device 605. The receiver 610 may utilize a single antenna or a collection of multiple antennas.

[0154] The transmitter 615 may provide means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information associated with various information channels (e.g., control channels, data channels, information channels related to a spatial metric-based mobility procedure using a multi-port mobility reference signal), such as packets, user data, control information, or any combination thereof. In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a collection of multiple antennas.

[0155] The device 605 or its various components may be examples of components for performing various aspects of a spatial metric-based mobility procedure using a multi-port mobility reference signal as described herein. For example, the communication manager 620 may include a multi-port reference signal component 625, a multi-dimensional channel response component 630, a channel measurement vector component 635, or any combination thereof. The communication manager 620 may be an example of various aspects of the communication manager 520 as described herein. In some examples, the communication manager 620 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with the receiver 610, the transmitter 615, or both. For example, the communication manager 620 may receive information from the receiver 610, transmit information to the transmitter 615, or be integrated with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.

[0156] According to examples as disclosed herein, the communication manager 620 may support wireless communications at a UE. The multi-port reference signal component 625 may be configured to or otherwise support components for receiving a reference signal associated with a set of multiple antenna ports. The multi-dimensional channel response component 630 may be configured to or otherwise support components for measuring a multi-dimensional channel response based on receiving the reference signal, the multi-dimensional channel response being associated with a set of multiple measured channel metrics corresponding to the set of multiple antenna ports. The channel measurement vector component 635 may be configured to or otherwise support components for sending a report including a channel measurement vector based on measuring the multi-dimensional channel response, the channel measurement vector indicating a set of multiple measured channel metrics for one or more dimensions of the multi-dimensional channel response.

[0157] Figure 7A block diagram 700 of a communication manager 720 supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The communication manager 720 can be an example of aspects of the communication manager 520, the communication manager 620, or both as described herein. The communication manager 720 or its various components can be examples of means for performing various aspects of the spatial metric based mobility procedure using a multi-port mobility reference signal as described herein. For example, the communication manager 720 can include a multi-port reference signal component 725, a multi-dimensional channel response component 730, a channel measurement vector component 735, a mobility management component 740, a channel response component 745, a channel metric component 750, a joint transmission component 755, or any combination thereof. Each of these components can communicate with each other directly or indirectly (e.g., via one or more buses).

[0158] According to examples as disclosed herein, the communication manager 720 may support wireless communications at a UE. The multi-port reference signal component 725 may be configured to or otherwise support components for receiving a reference signal associated with a set of multiple antenna ports. The multi-dimensional channel response component 730 may be configured to or otherwise support components for measuring a multi-dimensional channel response based on receiving the reference signal, the multi-dimensional channel response being associated with a set of multiple measured channel metrics corresponding to the set of multiple antenna ports. The channel measurement vector component 735 may be configured to or otherwise support components for sending a report including a channel measurement vector based on measuring the multi-dimensional channel response, the channel measurement vector indicating a set of multiple measured channel metrics for one or more dimensions of the multi-dimensional channel response.

[0159] In some examples, to support receiving a reference signal, the multi-port reference signal component 725 may be configured as or otherwise support components for receiving a reference signal from a set of multiple antenna ports associated with the same cell ID and the same beam ID, wherein a channel measurement vector indicates a set of multiple measured channel metrics associated with the same cell ID and the same beam ID.

[0160] In some examples, to support receiving a reference signal, the multi-port reference signal component 725 may be configured as or otherwise support components for receiving a reference signal from a set of multiple antenna ports associated with two or more cell IDs, two or more beam IDs, or both, where a channel measurement vector indicates a set of multiple measured channel metrics associated with two or more cell IDs, two or more beam IDs, or both.

[0161] In some examples, to support measuring a multi-dimensional channel response, the channel response component 745 may be configured or otherwise support means for measuring a respective channel response associated with each of two or more cell IDs, associated with each of two or more beam IDs, or associated with both. In some examples, to support measuring a multi-dimensional channel response, the multi-dimensional channel response component 730 may be configured or otherwise support means for concatenating respective channel responses to obtain a multi-dimensional channel response.

[0162] In some examples, channel metric component 750 can be configured or otherwise support components for measuring a set of multiple channel metrics based on the multi-dimensional channel response. In some examples, channel metric component 750 can be configured or otherwise support components for determining a channel metric subset of a set of multiple channel metrics associated with a subset of one or more dimensions of the multi-dimensional channel response, the channel metric subset associated with a maximum metric value, wherein the channel measurement vector includes the channel metric subset based on the determined channel metric subset.

[0163] In some examples, the joint transmission component 755 may be configured as or otherwise support means for receiving a signal indicating that two or more cell IDs, two or more beam IDs, or both support coherent joint transmission or non-coherent joint transmission for multi-port channel measurement.

[0164] In some examples, the joint transmission component 755 may be configured as or otherwise support components for determining two or more cell IDs, two or more beam IDs, or both based on values ​​of two or more cell IDs, two or more beam IDs, or both to support coherent joint transmission or incoherent joint transmission for multi-port channel measurement.

[0165] In some examples, the joint transmission component 755 may be configured to or otherwise support components for determining two or more cell IDs, two or more beam IDs, or both based on a multiplexing pattern associated with a reference signal to support coherent joint transmission or non-coherent joint transmission for multi-port channel measurement.

[0166] In some examples, to support measuring a multi-dimensional channel response, multi-dimensional channel response component 730 may be configured or otherwise support components for measuring a channel response vector associated with receiving a reference signal from a set of multiple antenna ports. In some examples, to support measuring a multi-dimensional channel response, multi-dimensional channel response component 730 may be configured or otherwise support components for performing a transform on a channel response vector to obtain one or more dimensions of a multi-dimensional channel response.

[0167] In some examples, the multi-dimensional channel response component 730 may be configured to or otherwise support components for determining whether a reference signal is associated with beamforming for one or more subsets of antenna ports in a set of multiple antenna ports, wherein performing a transformation on the channel response vector is based on that determination.

[0168] In some examples, channel response component 745 may be configured or otherwise support components for whitening a channel response vector based on an interference covariance structure, where the channel response vector is measured across multiple antennas supporting joint antenna processing.

[0169] In some examples, channel metric component 750 may be configured or otherwise support components for measuring a set of multiple measured channel metrics based on decomposing a channel response vector into one or more dimensions.

[0170] In some examples, each measured channel metric in a set of multiple measured channel metrics in the channel measurement vector is associated with a corresponding antenna port in a set of multiple antenna ports. In some examples, each measured channel metric in a set of multiple measured channel metrics in the channel measurement vector is associated with a corresponding set of two or more antenna ports in a set of multiple antenna ports.

[0171] In some examples, mobility management component 740 may be configured or otherwise support components for receiving a message indicating one or more metrics associated with mobility management for the UE based on a report indicating a channel measurement vector. In some examples, mobility management component 740 may be configured or otherwise support components for determining one or more metrics associated with mobility management for the UE based on a report indicating a channel measurement vector.

[0172] In some examples, to support receiving reference signals, the multi-port reference signal component 725 may be configured as or otherwise support components for receiving reference signals from a set of multiple antenna ports based on FDM across a set of multiple frequency combs, TDM across a set of multiple symbols, delay domain multiplexing across a set of multiple cyclic shifts, CDM, or non-orthogonal code division multiplexing.

[0173] In some examples, the set of multiple measured channel metrics includes a signal strength metric, a spectral efficiency metric, a rank metric, a set of antenna ports in a set of multiple antenna ports associated with each measured channel metric in the set of multiple measured channel metrics, or any combination thereof. In some examples, the reference signal includes an SSB, a TRS, or a CSI-RS.

[0174] Figure 8A diagram of a system 800 including a device 805 supporting a spatial metric-based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The device 805 may be an example of a device 505, a device 605, or a UE 115 as described herein, or include components thereof. The device 805 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 805 may include components for two-way voice and data communications, including components for sending and receiving communications, such as a communication manager 820, an input / output (I / O) controller 810, a transceiver 815, an antenna 825, a memory 830, a code 835, and a processor 840. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 845).

[0175] I / O controller 810 can manage input signals and output signals of device 805. I / O controller 810 can also manage peripheral devices that are not integrated into device 805. In some cases, I / O controller 810 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 810 can utilize an operating system, such as Or another known operating system. Additionally or alternatively, I / O controller 810 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 810 may be implemented as part of a processor (such as processor 840). In some cases, a user may interact with device 805 via I / O controller 810 or via hardware components controlled by I / O controller 810.

[0176] In some cases, the device 805 may include a single antenna 825. However, in some other cases, the device 805 may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 815 may communicate bidirectionally via one or more antennas 825, wired or wireless links as described herein. For example, the transceiver 815 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 815 may also include a modem for: modulating packets; providing the modulated packets to one or more antennas 825 for transmission; and demodulating packets received from one or more antennas 825. The transceiver 815 or the transceiver 815 and one or more antennas 825 may be examples of transmitters 515, transmitters 615, receivers 510, receivers 610, or any combination thereof or components thereof as described herein.

[0177] The memory 830 may include random access memory (RAM) and read-only memory (ROM). The memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed by the processor 840, cause the device 805 to perform various functions described herein. The code 835 may be stored in a non-transitory computer-readable medium (such as system memory or another type of memory). In some cases, the code 835 may not be directly executable by the processor 840, but may (e.g., when compiled and executed) cause the computer to perform the functions described herein. In some cases, the memory 830 may include, among other things, a basic I / O system (BIOS) that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0178] The processor 840 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 840 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 840. The processor 840 may be configured to execute computer-readable instructions stored in a memory (e.g., a memory 830) to enable the device 805 to perform various functions (e.g., functions or tasks of supporting a spatial metric-based mobility procedure using a multi-port mobility reference signal). For example, the device 805 or a component of the device 805 may include a processor 840 and a memory 830 coupled to or coupled to the processor 840, and the processor 840 and the memory 830 are configured to perform the various functions described herein.

[0179] According to examples as disclosed herein, the communication manager 820 may support wireless communications at a UE. For example, the communication manager 820 may be configured to or otherwise support a component for receiving a reference signal associated with a set of multiple antenna ports. The communication manager 820 may be configured to or otherwise support a component for measuring a multi-dimensional channel response based on receiving the reference signal, the multi-dimensional channel response being associated with a set of multiple measured channel metrics corresponding to the set of multiple antenna ports. The communication manager 820 may be configured to or otherwise support a component for sending a report including a channel measurement vector based on measuring the multi-dimensional channel response, the channel measurement vector indicating a set of multiple measured channel metrics for one or more dimensions of the multi-dimensional channel response.

[0180] By including or configuring a communication manager 820 according to examples as described herein, the device 805 can support techniques for improving communication reliability, reducing latency, reducing power consumption, more efficiently utilizing communication resources, improving coordination between devices, and improving utilization of processing power.

[0181] In some examples, the communication manager 820 may be configured to perform various operations (e.g., receive, monitor, transmit) using or otherwise cooperating with the transceiver 815, one or more antennas 825, or any combination thereof. 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 processor 840, the memory 830, the code 835, or any combination thereof. For example, the code 835 may include instructions that are executable by the processor 840 to cause the device 805 to perform various aspects of the spatial metric-based mobility procedure using a multi-port mobility reference signal as described herein, or the processor 840 and the memory 830 may be otherwise configured to perform or support such operations.

[0182] Fig. 9 A block diagram 900 of a device 905 supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The device 905 may be an example of aspects of a network entity 105 as described herein. The device 905 may include a receiver 910, a transmitter 915, and a communication manager 920. The device 905 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0183] The receiver 910 may provide means for obtaining (e.g., receiving, determining, identifying) 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). The information may be passed to other components of the device 905. In some examples, the receiver 910 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, the receiver 910 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof.

[0184] The transmitter 915 may provide a means for outputting (e.g., sending, providing, conveying, transmitting) information generated by other components of the device 905. For example, the 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, the transmitter 915 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 915 may support outputting information by sending signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 915 and the receiver 910 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0185] The communication manager 920, the receiver 910, the transmitter 915, or various combinations thereof, or various components thereof, may be examples of means for performing various aspects of the spatial metric based mobility procedures using multi-port mobility reference signals as described herein. For example, the communication manager 920, the receiver 910, the transmitter 915, or various combinations thereof, or components thereof, may support methods for performing one or more of the functions described herein.

[0186] In some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof that is configured to or otherwise supports components for performing the functions described in the present disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more of the functions described herein (e.g., by executing instructions stored in the memory by the processor).

[0187] Additionally or alternatively, in some examples, the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be implemented in code executed by a processor (e.g., as communication management software or firmware). If implemented in code executed by a processor, the functionality of the communication manager 920, the receiver 910, the transmitter 915, or various combinations or components thereof may be performed by a general purpose processor (e.g., configured as or otherwise supporting components for performing the functions described in the present disclosure), a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices.

[0188] In some examples, the communication manager 920 may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with the receiver 910, the transmitter 915, or both. For example, the communication manager 920 may receive information from the receiver 910, transmit information to the transmitter 915, or be integrated with the receiver 910, the transmitter 915, or both to obtain information, output information, or perform various other operations as described herein.

[0189] According to examples as disclosed herein, the communication manager 920 may support wireless communications at a network entity. For example, the communication manager 920 may be configured to or otherwise support components for sending a reference signal associated with a set of multiple antenna ports. The communication manager 920 may be configured to or otherwise support components for receiving a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to the set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal. The communication manager 920 may be configured to or otherwise support components for sending a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based on the report indicating the channel measurement vector.

[0190] By including or configuring a communications manager 920 according to examples as described herein, a device 905 (e.g., a processor controlling or otherwise coupled to a receiver 910, a transmitter 915, a communications manager 920, or a combination thereof) may support techniques for reducing processing, reducing power consumption, and more efficiently utilizing communications resources.

[0191] Fig.10 A block diagram 1000 of a device 1005 supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The device 1005 may be an example of aspects of the device 905 or the network entity 105 as described herein. The device 1005 may include a receiver 1010, a transmitter 1015, and a communication manager 1020. The device 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0192] Receiver 1010 may provide means for obtaining (e.g., receiving, determining, identifying) 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). The information may be passed to other components of device 1005. In some examples, receiver 1010 may support obtaining information by receiving signals via one or more antennas. Additionally or alternatively, receiver 1010 may support obtaining information by receiving signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof.

[0193] The transmitter 1015 may provide a means for outputting (e.g., sending, providing, conveying, transmitting) information generated by other components of the device 1005. For example, the 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, the transmitter 1015 may support outputting information by sending signals via one or more antennas. Additionally or alternatively, the transmitter 1015 may support outputting information by sending signals via one or more wired (e.g., electrical, optical) interfaces, wireless interfaces, or any combination thereof. In some examples, the transmitter 1015 and the receiver 1010 may be co-located in a transceiver, which may include a modem or be coupled to a modem.

[0194] The device 1005 or its various components may be examples of components for performing various aspects of a spatial metric-based mobility procedure using a multi-port mobility reference signal as described herein. For example, the communication manager 1020 may include a multi-port reference signal component 1025, a channel measurement vector component 1030, a mobility management component 1035, or any combination thereof. The communication manager 1020 may be an example of various aspects of the communication manager 920 as described herein. In some examples, the communication manager 1020 or its various components may be configured to perform various operations (e.g., receive, obtain, monitor, output, send) using or otherwise cooperating with the receiver 1010, the transmitter 1015, or both. For example, the communication manager 1020 may receive information from the receiver 1010, transmit information to the transmitter 1015, or be integrated with the receiver 1010, the transmitter 1015, or both to obtain information, output information, or perform various other operations as described herein.

[0195] According to examples as disclosed herein, the communication manager 1020 may support wireless communications at a network entity. The multi-port reference signal component 1025 may be configured to or otherwise support components for sending a reference signal associated with a set of multiple antenna ports. The channel measurement vector component 1030 may be configured to or otherwise support components for receiving a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to the set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal. The mobility management component 1035 may be configured to or otherwise support components for sending a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based on the report indicating the channel measurement vector.

[0196] Fig.11 A block diagram 1100 of a communication manager 1120 supporting a spatial metric based mobility procedure using a multi-port mobility reference signal in accordance with one or more aspects of the present disclosure is shown. The communication manager 1120 may be an example of aspects of the communication manager 920, the communication manager 1020, or both as described herein. The communication manager 1120 or its various components may be examples of means for performing various aspects of the spatial metric based mobility procedure using a multi-port mobility reference signal as described herein. For example, the communication manager 1120 may include a multi-port reference signal component 1125, a channel measurement vector component 1130, a mobility management component 1135, a joint transmission component 1140, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses), which communication may include communication within a protocol layer of a protocol stack, communication associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with the network entity 105, between devices, components, or virtualized components associated with the network entity 105), or any combination thereof.

[0197] According to examples as disclosed herein, the communication manager 1120 may support wireless communications at a network entity. The multi-port reference signal component 1125 may be configured to or otherwise support components for sending a reference signal associated with a set of multiple antenna ports. The channel measurement vector component 1130 may be configured to or otherwise support components for receiving a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to the set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal. The mobility management component 1135 may be configured to or otherwise support components for sending a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based on a report indicating the channel measurement vector.

[0198] In some examples, to support sending a reference signal, the multi-port reference signal component 1125 may be configured as or otherwise support components for sending a reference signal from a set of multiple antenna ports of a network entity, the set of multiple antenna ports being associated with the same cell ID and the same beam ID, wherein the channel measurement vector indicates a set of multiple measured channel metrics associated with the same cell ID and the same beam ID.

[0199] In some examples, to support sending a reference signal, the multi-port reference signal component 1125 may be configured as or otherwise support components for sending a reference signal from a set of multiple antenna ports, the set of multiple antenna ports being associated with two or more cell IDs, two or more beam IDs, or both, wherein a channel measurement vector indicates a set of multiple measured channel metrics associated with two or more cell IDs, two or more beam IDs, or both.

[0200] In some examples, the joint transmission component 1140 may be configured as or otherwise support components for transmitting a signal indicating that two or more cell IDs, two or more beam IDs, or both support coherent joint transmission or non-coherent joint transmission for channel measurement.

[0201] In some examples, each measured channel metric in a set of multiple measured channel metrics in the channel measurement vector is associated with a corresponding antenna port in a set of multiple antenna ports. In some examples, each measured channel metric in a set of multiple measured channel metrics in the channel measurement vector is associated with a corresponding set of two or more antenna ports in a set of multiple antenna ports.

[0202] In some examples, to support sending reference signals, the multi-port reference signal component 1125 may be configured as or otherwise support components for sending reference signals from a set of multiple antenna ports using FDM across a set of multiple frequency combs, TDM across a set of multiple symbols, delay domain multiplexing across a set of multiple cyclic shifts, CDM, or non-orthogonal code division multiplexing.

[0203] In some examples, the set of multiple measured channel metrics includes a signal strength metric, a spectral efficiency metric, a rank metric, or any combination thereof. In some examples, one or more metrics associated with mobility management for the UE include a handover command for the UE.

[0204] Fig.12 A diagram of a system 1200 including a device 1205 supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The device 1205 may be an example of a device 905, a device 1005, or a network entity 105 as described herein, or include components thereof. The device 1205 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which communication may include communication through one or more wired interfaces, through one or more wireless interfaces, or any combination thereof. The device 1205 may include components that support output and acquisition of communications, such as a communication manager 1220, a transceiver 1210, an antenna 1215, a memory 1225, a code 1230, and a processor 1235. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1240).

[0205] The transceiver 1210 may support bidirectional communication via a wired link, a wireless link, or both as described herein. In some examples, the transceiver 1210 may include a wired transceiver and may communicate bidirectionally with another wired transceiver. Additionally or alternatively, in some examples, the transceiver 1210 may include a wireless transceiver and may communicate bidirectionally with another wireless transceiver. In some examples, the device 1205 may include one or more antennas 1215, which may be capable of (e.g., concurrently) sending or receiving wireless transmissions. The transceiver 1210 may also include a modem for: modulating a signal; providing the modulated signal for transmission (e.g., via one or more antennas 1215, via 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 implementations, the 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 receiving or obtaining operations, or one or more interfaces coupled to one or more antennas 1215 configured to support various transmitting or outputting operations, or a combination thereof. In some implementations, the transceiver 1210 may include or be configured to be coupled to one or more processors or memory components, which may be operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other output, or any combination of the above. In some implementations, the transceiver 1210, or the transceiver 1210 and one or more antennas 1215, or the transceiver 1210 and one or more antennas 1215 and one or more processors or memory components (e.g., processor 1235 or memory 1225 or both) may be included in a chip or chip assembly installed in the device 1205. In some examples, the transceiver may be operable to support communications via one or more communication links (eg, communication link 125, backhaul communication link 120, midhaul communication link 162, fronthaul communication link 168).

[0206] Memory 1225 may include RAM and ROM. Memory 1225 may store computer-readable, computer-executable code 1230 including instructions that, when executed by processor 1235, cause device 1205 to perform various functions described herein. Code 1230 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, code 1230 may not be directly executable by processor 1235, but may (e.g., when compiled and executed) cause a computer to perform the functions described herein. In some cases, memory 1225 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0207] The processor 1235 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA, a microcontroller, a programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination thereof). In some cases, the 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 the processor 1235. The processor 1235 may be configured to execute computer-readable instructions stored in a memory (e.g., a memory 1225) to enable the device 1205 to perform various functions (e.g., functions or tasks of supporting a spatial metric-based mobility procedure using a multi-port mobility reference signal). For example, the device 1205 or a component of the device 1205 may include a processor 1235 and a memory 1225 coupled to the processor 1235, and the processor 1235 and the memory 1225 are configured to perform the various functions described herein. The 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 functions of the device 1205. The processor 1235 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1205 (such as in the memory 1225). In some specific implementations, the processor 1235 may be a component of a processing system. A processing system may generally refer to a system or series of machines or components that receives inputs and processes these inputs to produce a set of outputs (which may be passed to, for example, other systems or components of the device 1205). For example, the processing system of the device 1205 may refer to a system including various other components or subcomponents of the device 1205, such as the processor 1235, or the transceiver 1210, or the communication manager 1220, or other components or combinations of components of the device 1205. The processing system of device 1205 can interface with other components of device 1205, and can process information (such as input or signal) received from other components or output information to other components. For example, a chip or modem of device 1205 may include a processing system and one or more interfaces for outputting information or for obtaining information or both. One or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information or the same interface configured to output information and obtain information, as well as other specific implementations. In some specific implementations, one or more interfaces may refer to an interface between a processing system of a chip or modem and a transmitter, so that device 1205 can send information output from the chip or modem.Additionally or alternatively, in some implementations, one or more interfaces may refer to an interface between a processing system of a chip or modem and a receiver, such that the device 1205 may obtain information or signal input, and the information may be passed to the processing system. One of ordinary skill in the art will readily recognize that a first interface may also obtain information or signal input, and a second interface may also output information or signal output.

[0208] In some examples, bus 1240 may support communications of a protocol layer (e.g., within a protocol layer) of a protocol stack. In some examples, bus 1240 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack), which may include communications performed within a component of device 1205, or communications performed between different components of device 1205 that may be co-located or 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, memory 1225, code 1230, and processor 1235 may be located in one of the different components or divided between the different components).

[0209] In some examples, the communication manager 1220 can manage aspects of communications with the core network 130 (e.g., via one or more wired or wireless backhaul links). For example, the communication manager 1220 can manage the delivery of data communications for client devices, such as one or more UEs 115. In some examples, the communication manager 1220 can manage communications with other network entities 105 and can include a controller or scheduler for controlling communications with the UE 115 in coordination with the other network entities 105. In some examples, the communication manager 1220 can support an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between network entities 105.

[0210] According to examples as disclosed herein, the communication manager 1220 may support wireless communications at a network entity. For example, the communication manager 1220 may be configured to or otherwise support components for sending a reference signal associated with a set of multiple antenna ports. The communication manager 1220 may be configured to or otherwise support components for receiving a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to the set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal. The communication manager 1220 may be configured to or otherwise support components for sending a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based on the report indicating the channel measurement vector.

[0211] By including or configuring a communication manager 1220 according to examples as described herein, the device 1205 can support techniques for improving communication reliability, reducing latency, reducing power consumption, more efficiently utilizing communication resources, and improving coordination between devices.

[0212] In some examples, the communication manager 1220 may be configured to perform various operations (e.g., receive, obtain, monitor, output, transmit) using or otherwise cooperating with the transceiver 1210, one or more antennas 1215 (e.g., where applicable), or any combination thereof. 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, the processor 1235, the memory 1225, the code 1230, or any combination thereof. For example, the code 1230 may include instructions that are executable by the processor 1235 to cause the device 1205 to perform various aspects of the spatial metric-based mobility procedure using a multi-port mobility reference signal as described herein, or the processor 1235 and the memory 1225 may be otherwise configured to perform or support such operations.

[0213] Fig.13 A flow chart illustrating a method 1300 for supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The operations of the method 1300 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1300 may be implemented by a UE or a component thereof as described herein. Figures 1 to 8 The described UE 115 may be performed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0214] At 1305, the method may include receiving a reference signal associated with a set of multiple antenna ports. The operations of 1305 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1305 may be performed by Figure 7 The described multi-port reference signal component 725 is implemented.

[0215] At 1310, the method may include measuring a multi-dimensional channel response based on the received reference signal, the multi-dimensional channel response being associated with a set of multiple measured channel metrics corresponding to a set of multiple antenna ports. The operations of 1310 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1310 may be performed as described in reference to Figure 7 The multi-dimensional channel response component 730 described above is performed.

[0216] At 1315, the method may include sending a report including a channel measurement vector based on measuring the multidimensional channel response, the channel measurement vector indicating a set of channel metrics for multiple measurements of one or more dimensions of the multidimensional channel response. The operations of 1315 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1315 may be performed as described in reference to Figure 7 The channel measurement vector component 735 is described to perform.

[0217] Fig.14 A flow chart illustrating a method 1400 for supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1400 may be implemented by a UE or a component thereof as described herein. Figures 1 to 8 The described UE 115 may be performed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0218] At 1405, the method may include receiving a reference signal associated with a set of multiple antenna ports. The operations of 1405 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1405 may be performed by reference to Figure 7 The described multi-port reference signal component 725 is implemented.

[0219] At 1410, the method may include measuring a multidimensional channel response based on receiving a reference signal, the multidimensional channel response associated with a set of multiple measured channel metrics corresponding to a set of multiple antenna ports. In some examples, measuring the multidimensional channel response may include measuring a channel response vector associated with receiving the reference signal from the multiple antenna ports. The operations of 1410 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1410 may be performed as described in reference to Figure 7 The multi-dimensional channel response component 730 described above is performed.

[0220] At 1415, the method may include performing a transform on the channel response vector to obtain one or more dimensions of the multi-dimensional channel response. The operations of 1415 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1415 may be performed as described in reference to Figure 7 The multi-dimensional channel response component 730 described above is performed.

[0221] At 1420, the method may include sending a report including a channel measurement vector based on measuring the multidimensional channel response, the channel measurement vector indicating a set of channel metrics for multiple measurements of one or more dimensions of the multidimensional channel response. The operations of 1420 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1420 may be performed as described in reference to Figure 7 The channel measurement vector component 735 is described to perform.

[0222] Fig.15 A flow chart illustrating a method 1500 for supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by a UE or a component thereof as described herein. For example, the operations of the method 1500 may be implemented by a UE or a component thereof as described herein. Figures 1 to 8 The described UE 115 may be performed. In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the described functions.

[0223] At 1505, the method may include receiving a reference signal associated with a set of multiple antenna ports. The operations of 1505 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1505 may be performed by reference to Figure 7 The described multi-port reference signal component 725 is implemented.

[0224] At 1510, the method may include measuring a multidimensional channel response based on receiving a reference signal, the multidimensional channel response being associated with a set of multiple measured channel metrics corresponding to a set of multiple antenna ports. The operations of 1510 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1510 may be performed as described in reference to Figure 7 The multi-dimensional channel response component 730 described above is performed.

[0225] At 1515, the method may include sending a report including a channel measurement vector based on measuring the multidimensional channel response, the channel measurement vector indicating a set of channel metrics for multiple measurements of one or more dimensions of the multidimensional channel response. The operations of 1515 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1515 may be performed as described in reference to Figure 7 The channel measurement vector component 735 is described to perform.

[0226] At 1520, the method may include receiving a message indicating one or more metrics associated with mobility management for the UE based on a report indicating a channel measurement vector. The operations of 1520 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1520 may be performed as described in reference to Figure 7 The described mobility management component 740 is performed.

[0227] Fig.16 A flow chart illustrating a method 1600 for supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by a network entity or a component thereof as described herein. For example, the operations of the method 1600 may be implemented by a network entity or a component thereof as described herein. Figures 1 to 4 and Figures 9 to 12 The network entity described herein may be executed by the network entity described herein. In some examples, the network entity may execute an instruction set to control the functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform various aspects of the described functions.

[0228] At 1605, the method may include sending a reference signal associated with a set of multiple antenna ports. The operations of 1605 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1605 may be performed as described in reference to Fig.11 The described multi-port reference signal component 1125 is implemented.

[0229] At 1610, the method may include receiving a report including a channel measurement vector based on a reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to a set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal. The operations of 1610 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1610 may be performed by Fig.11 The channel measurement vector component 1130 is described to perform.

[0230] At 1615, the method may include sending a message indicating one or more metrics associated with mobility management for a UE communicating with a network entity based on a report indicating a channel measurement vector. The operations of 1615 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1615 may be performed as described in reference to Fig.11 The described mobility management component 1135 is performed.

[0231] Fig.17A flow chart illustrating a method 1700 for supporting a spatial metric based mobility procedure using a multi-port mobility reference signal according to one or more aspects of the present disclosure is shown. The operations of the method 1700 may be implemented by a network entity or a component thereof as described herein. For example, the operations of the method 1700 may be implemented by a network entity or a component thereof as described herein. Figures 1 to 4 and Figures 9 to 12 The network entity described herein may be executed by the network entity described herein. In some examples, the network entity may execute an instruction set to control the functional elements of the network entity to perform the described functions. Additionally or alternatively, the network entity may use dedicated hardware to perform various aspects of the described functions.

[0232] At 1705, the method may include sending a reference signal associated with a set of multiple antenna ports. The operations of 1705 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1705 may be performed as described in reference to Fig.11 The described multi-port reference signal component 1125 is implemented.

[0233] At 1710, the method may include sending a reference signal from a set of multiple antenna ports using FDM across a set of multiple frequency combs, TDM across a set of multiple symbols, delay domain multiplexing across a set of multiple cyclic shifts, CDM, or non-orthogonal code division multiplexing. The operations of 1710 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1710 may be performed by as described in reference Fig.11 The described multi-port reference signal component 1125 is implemented.

[0234] At 1715, the method may include receiving a report including a channel measurement vector based on the reference signal, the channel measurement vector indicating a set of multiple measured channel metrics corresponding to a set of multiple antenna ports, wherein the set of multiple measured channel metrics is for one or more dimensions of a multi-dimensional channel response based on the reference signal. The operations of 1715 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1715 may be performed by Fig.11 The channel measurement vector component 1130 is described to perform.

[0235] At 1720, the method may include sending a message indicating one or more metrics associated with mobility management for a UE communicating with a network entity based on a report indicating a channel measurement vector. The operations of 1720 may be performed according to examples as disclosed herein. In some examples, aspects of the operations of 1720 may be performed as described in reference to Fig.11 The described mobility management component 1135 is performed.

[0236] The following provides an overview of various aspects of the disclosure:

[0237] Aspect 1: A method for performing wireless communications at a UE, comprising: receiving a reference signal associated with multiple antenna ports; measuring a multidimensional channel response based at least in part on receiving the reference signal, the multidimensional channel response being associated with multiple measured channel metrics corresponding to the multiple antenna ports; and sending a report including a channel measurement vector based at least in part on measuring the multidimensional channel response, the channel measurement vector indicating the multiple measured channel metrics for one or more dimensions of the multidimensional channel response.

[0238] Aspect 2: A method according to Aspect 1, wherein receiving the reference signal includes: receiving the reference signal from the multiple antenna ports associated with the same cell ID and the same beam ID, wherein the channel measurement vector indicates the multiple measured channel metrics associated with the same cell ID and the same beam ID.

[0239] Aspect 3: A method according to Aspect 1, wherein receiving the reference signal includes: receiving the reference signal from the multiple antenna ports associated with two or more cell IDs, two or more beam IDs, or both, wherein the channel measurement vector indicates the multiple measured channel metrics associated with the two or more cell IDs, the two or more beam IDs, or both.

[0240] Aspect 4: A method according to Aspect 3, wherein measuring the multidimensional channel response includes: measuring a corresponding channel response associated with each of the two or more cell IDs, associated with each of the two or more beam IDs, or associated with both; and cascading the corresponding channel responses to obtain the multidimensional channel response.

[0241] Aspect 5: The method according to any one of Aspects 3 to 4 further includes: measuring the multiple channel metrics based at least in part on the multidimensional channel response; and determining a channel metric subset of the multiple channel metrics associated with a subset of the one or more dimensions of the multidimensional channel response, the channel metric subset being associated with a maximum metric value, wherein the channel measurement vector includes the channel metric subset determined at least in part based on the determination.

[0242] Aspect 6: The method according to any one of Aspects 3 to 5 further includes: receiving a signal indicating that the two or more cell IDs, the two or more beam IDs, or both support coherent joint transmission or non-coherent joint transmission for multi-port channel measurement.

[0243] Aspect 7: The method according to any one of Aspects 3 to 5 further includes: determining, at least in part based on the values ​​of the two or more cell IDs, the two or more beam IDs, or both, whether the two or more cell IDs, the two or more beam IDs, or both support coherent joint transmission or incoherent joint transmission for multi-port channel measurement.

[0244] Aspect 8: The method according to any one of Aspects 3 to 5 further includes: determining, at least in part based on a multiplexing pattern associated with the reference signal, that the two or more cell IDs, the two or more beam IDs, or both support coherent joint transmission or incoherent joint transmission for multi-port channel measurement.

[0245] Aspect 9: A method according to any one of Aspects 1 to 8, wherein measuring the multidimensional channel response comprises: measuring a channel response vector associated with receiving the reference signal from the multiple antenna ports; and performing a transformation on the channel response vector to obtain the one or more dimensions of the multidimensional channel response.

[0246] Aspect 10: The method according to Aspect 9 also includes: determining whether the reference signal is associated with beamforming across one or more subsets of antenna ports in the multiple antenna ports, wherein performing the transformation of the channel response vector is at least partially based on the determination.

[0247] Aspect 11: The method according to any one of aspects 9 to 10 further includes: whitening the channel response vector based at least in part on an interference covariance structure, wherein the channel response vector is measured across multiple antennas supporting joint antenna processing.

[0248] Aspect 12: The method according to any one of aspects 9 to 11 further comprises: measuring the plurality of measured channel metrics based at least in part on decomposing the channel response vector into the one or more dimensions.

[0249] Aspect 13: The method according to any one of aspects 1 to 12, wherein each measured channel metric of the plurality of measured channel metrics in the channel measurement vector is associated with a corresponding antenna port of the plurality of antenna ports.

[0250] Aspect 14: A method according to any one of Aspects 1 to 12, wherein each measured channel metric of the multiple measured channel metrics in the channel measurement vector is associated with a corresponding set of two or more antenna ports of the multiple antenna ports.

[0251] Aspect 15: The method according to any one of aspects 1 to 14 further includes: receiving a message indicating one or more metrics associated with mobility management for the UE based at least in part on the report indicating the channel measurement vector.

[0252] Aspect 16: The method according to any one of aspects 1 to 14 further includes: determining one or more metrics associated with mobility management for the UE based at least in part on the report indicating the channel measurement vector.

[0253] Aspect 17: A method according to any one of Aspects 1 to 16, wherein receiving the reference signal includes: receiving the reference signal from the multiple antenna ports based at least in part on FDM across multiple frequency combs, TDM across multiple symbols, delay domain multiplexing across multiple cyclic shifts, CDM, or non-orthogonal CDM.

[0254] Aspect 18: A method according to any one of Aspects 1 to 17, wherein the multiple measured channel metrics include a signal strength metric, a spectral efficiency metric, a rank metric, a set of antenna ports in the multiple antenna ports associated with each measured channel metric in the multiple measured channel metrics, or any combination thereof.

[0255] Aspect 19: The method according to any one of aspects 1 to 18, wherein the reference signal comprises an SSB, a TRS or a CSI-RS.

[0256] Aspect 20: A method for wireless communication at a network entity, comprising: sending a reference signal associated with multiple antenna ports; receiving a report including a channel measurement vector based at least in part on the reference signal, the channel measurement vector indicating multiple measured channel metrics corresponding to the multiple antenna ports, wherein the multiple measured channel metrics are for one or more dimensions of a multi-dimensional channel response based at least in part on the reference signal; and sending a message indicating one or more metrics associated with mobility management for a UE communicating with the network entity based at least in part on the report indicating the channel measurement vector.

[0257] Aspect 21: A method according to Aspect 20, wherein sending the reference signal includes: sending the reference signal from the multiple antenna ports of the network entity, the multiple antenna ports are associated with the same cell ID and the same beam ID, wherein the channel measurement vector indicates the multiple measured channel metrics associated with the same cell ID and the same beam ID.

[0258] Aspect 22: A method according to Aspect 20, wherein sending the reference signal includes: sending the reference signal from the multiple antenna ports, the multiple antenna ports are associated with two or more cell IDs, two or more beam IDs, or both, wherein the channel measurement vector indicates the multiple measured channel metrics associated with the two or more cell IDs, the two or more beam IDs, or both.

[0259] Aspect 23: The method according to Aspect 22 further includes: sending a signal indicating that the two or more cell IDs, the two or more beam IDs, or both support coherent joint transmission or non-coherent joint transmission for channel measurement.

[0260] Aspect 24: The method according to any one of aspects 20 to 23, wherein each measured channel metric of the plurality of measured channel metrics in the channel measurement vector is associated with a corresponding antenna port of the plurality of antenna ports.

[0261] Aspect 25: A method according to any one of Aspects 20 to 23, wherein each measured channel metric of the multiple measured channel metrics in the channel measurement vector is associated with a corresponding set of two or more antenna ports of the multiple antenna ports.

[0262] Aspect 26: A method according to any one of Aspects 20 to 25, wherein sending the reference signal includes: sending the reference signal from the multiple antenna ports using FDM across multiple frequency combs, TDM across multiple symbols, delay domain multiplexing across multiple cyclic shifts, CDM, or non-orthogonal CDM.

[0263] Aspect 27: The method according to any one of aspects 20 to 26, wherein the plurality of measured channel metrics include signal strength metrics, spectral efficiency metrics, rank metrics, or any combination thereof.

[0264] Aspect 28: The method according to any one of aspects 20 to 27, wherein the one or more metrics associated with the mobility management for the UE include a handover command for the UE.

[0265] Aspect 29: An apparatus for performing wireless communications at a UE, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 1 to 19.

[0266] Aspect 30: An apparatus for wireless communication at a UE, comprising: at least one component for performing a method according to any one of aspects 1 to 19.

[0267] Aspect 31: A non-transitory computer-readable medium storing a code for wireless communication at a UE, the code comprising instructions executable by a processor to perform a method according to any one of aspects 1 to 19.

[0268] Aspect 32: An apparatus for wireless communication at a network entity, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method according to any one of Aspects 20 to 28.

[0269] Aspect 33: An apparatus for wireless communication at a network entity, comprising: at least one component for performing a method according to any one of aspects 20 to 28.

[0270] Aspect 34: A non-transitory computer-readable medium storing code for wireless communication at a network entity, the code comprising instructions executable by a processor to perform the method according to any one of aspects 20 to 28.

[0271] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0272] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0273] The information and signals described herein may be represented using any of a variety of different technologies and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the specification may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0274] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed using a general purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0275] 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 codes of a computer-readable medium, or sent using one or more instructions or codes of a computer-readable medium. Other examples and specific implementations are within the scope of the present 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, hard wiring, or a combination of any of these items. Features that implement the functions can also be physically located at different locations, including being distributed so that the various parts of the functions are implemented at different physical locations.

[0276] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to be transmitted from one position to another position.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.By way of example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage device, disk storage device or other magnetic storage device or can be used for carrying or storing desired program code parts and any other non-transient medium that can be accessed by general or special-purpose computer or general or special-purpose processor in the form of instruction or data structure.Moreover, any connection is appropriately referred to as computer-readable medium.For example, if software is sent from website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of computer-readable medium. Disks and optical disks used herein include CDs, laser optical disks, optical optical disks, digital versatile disks (DVDs), floppy disks, and Blu-ray disks. Disks can reproduce data magnetically, while optical disks can reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media.

[0277] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items followed by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). In addition, as used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0278] The term "determining" encompasses a variety of actions, and thus, "determining" may include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, database or other data structure), ascertaining, and the like. Furthermore, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data stored in a memory), etc. Additionally, "determining" may include parsing, obtaining, selecting, choosing, establishing, and other such similar actions.

[0279] In the drawings, similar components or features may have the same reference label. In addition, various components of the same type may be distinguished by following the reference label with a dash and a second label to distinguish between similar components. If only the first reference label is used in the specification, the description may apply to any of the similar components having the same first reference label, regardless of the second or other subsequent reference labels.

[0280] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that may be implemented or within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration," rather than "preferred" or "advantageous over other examples." The specific implementation includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some cases, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0281] The description herein is provided to enable one of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: receiving a reference signal associated with a plurality of antenna ports; measuring a multi-dimensional channel response based at least in part on receiving the reference signal, the multi-dimensional channel response being associated with a plurality of measured channel metrics corresponding to the plurality of antenna ports; as well as A report including a channel measurement vector is sent based at least in part on measuring the multi-dimensional channel response, the channel measurement vector indicating the plurality of measured channel metrics for one or more dimensions of the multi-dimensional channel response.

2. The method of claim 1 , wherein receiving the reference signal comprises: The reference signal is received from the plurality of antenna ports associated with a same cell identifier and a same beam identifier, wherein the channel measurement vector indicates the plurality of measured channel metrics associated with the same cell identifier and the same beam identifier.

3. The method of claim 1 , wherein receiving the reference signal comprises: The reference signal is received from the plurality of antenna ports associated with two or more cell identifiers, two or more beam identifiers, or both, wherein the channel measurement vector indicates the plurality of measured channel metrics associated with the two or more cell identifiers, the two or more beam identifiers, or both.

4. The method of claim 3, wherein measuring the multi-dimensional channel response comprises: measuring a respective channel response associated with each of the two or more cell identifiers, associated with each of the two or more beam identifiers, or associated with both; and The respective channel responses are concatenated to obtain the multi-dimensional channel response.

5. The method according to claim 3, further comprising: measuring the plurality of channel metrics based at least in part on the multi-dimensional channel response; as well as Determining a channel metric subset of the plurality of channel metrics associated with a subset of the one or more dimensions of the multi-dimensional channel response, the channel metric subset associated with a maximum metric value, wherein the channel measurement vector includes the channel metric subset based at least in part on the determining.

6. The method according to claim 3, further comprising: A signal is received indicating that the two or more cell identifiers, the two or more beam identifiers, or both support coherent joint transmission or non-coherent joint transmission for multi-port channel measurement.

7. The method according to claim 3, further comprising: Based at least in part on values ​​of the two or more cell identifiers, the two or more beam identifiers, or both, determining that the two or more cell identifiers, the two or more beam identifiers, or both support coherent joint transmission or non-coherent joint transmission for multi-port channel measurement.

8. The method according to claim 3, further comprising: The two or more cell identifiers, the two or more beam identifiers, or both are determined based at least in part on a multiplexing pattern associated with the reference signal to support coherent joint transmission or non-coherent joint transmission for multi-port channel measurement.

9. The method of claim 1 , wherein measuring the multi-dimensional channel response comprises: measuring a channel response vector associated with receiving the reference signal from the plurality of antenna ports; as well as A transform is performed on the channel response vector to obtain the one or more dimensions of the multi-dimensional channel response.

10. The method according to claim 9, further comprising: A determination is made as to whether the reference signal is associated with beamforming across one or more subsets of the plurality of antenna ports, wherein performing the transforming of the channel response vector is based at least in part on the determination.

11. The method according to claim 9, further comprising: The channel response vector is whitened based at least in part on an interference covariance structure, wherein the channel response vector is measured across multiple antennas supporting joint antenna processing.

12. The method according to claim 9, further comprising: The plurality of measured channel metrics are measured based at least in part on decomposing the channel response vector into the one or more dimensions.

13. The method of claim 1, wherein each of the plurality of measured channel metrics in the channel measurement vector is associated with a corresponding antenna port of the plurality of antenna ports.

14. The method of claim 1, wherein each of the plurality of measured channel metrics in the channel measurement vector is associated with a respective set of two or more of the plurality of antenna ports.

15. The method according to claim 1, further comprising: A message is received indicating one or more metrics associated with mobility management for the UE based at least in part on the report indicating the channel measurement vector.

16. The method according to claim 1, further comprising: One or more metrics associated with mobility management for the UE are determined based at least in part on the report indicative of the channel measurement vector.

17. The method of claim 1, wherein receiving the reference signal comprises: The reference signals are received from the multiple antenna ports based at least in part on frequency domain multiplexing across multiple frequency combs, time domain multiplexing across multiple symbols, delay domain multiplexing across multiple cyclic shifts, code domain multiplexing, or non-orthogonal code division multiplexing.

18. The method of claim 1, wherein the plurality of measured channel metrics comprises a signal strength metric, a spectral efficiency metric, a rank metric, a set of antenna ports in the plurality of antenna ports associated with each of the plurality of measured channel metrics, or any combination thereof.

19. The method of claim 1, wherein the reference signal comprises a synchronization signal block, a tracking reference signal, or a channel state information reference signal.

20. A method for wireless communication at a network entity, comprising: transmitting a reference signal associated with a plurality of antenna ports; receiving, based at least in part on the reference signal, a report including a channel measurement vector indicating a plurality of measured channel metrics corresponding to the plurality of antenna ports, wherein the plurality of measured channel metrics are for one or more dimensions of a multi-dimensional channel response based at least in part on the reference signal; as well as A message is sent indicating one or more metrics associated with mobility management for a user equipment (UE) in communication with the network entity based at least in part on the report indicating the channel measurement vector.

21. The method of claim 20, wherein sending the reference signal comprises: The reference signal is sent from the multiple antenna ports of the network entity, the multiple antenna ports are associated with a same cell identifier and a same beam identifier, wherein the channel measurement vector indicates the multiple measured channel metrics associated with the same cell identifier and the same beam identifier.

22. The method of claim 20, wherein sending the reference signal comprises: The reference signal is sent from the multiple antenna ports, the multiple antenna ports are associated with two or more cell identifiers, two or more beam identifiers, or both, wherein the channel measurement vector indicates the multiple measured channel metrics associated with the two or more cell identifiers, the two or more beam identifiers, or both.

23. The method according to claim 22, further comprising: A signal is transmitted indicating that the two or more cell identifiers, the two or more beam identifiers, or both support coherent joint transmission or non-coherent joint transmission for channel measurement.

24. The method of claim 20, wherein each of the plurality of measured channel metrics in the channel measurement vector is associated with a corresponding antenna port of the plurality of antenna ports.

25. The method of claim 20, wherein each measured channel metric of the plurality of measured channel metrics in the channel measurement vector is associated with a respective set of two or more antenna ports of the plurality of antenna ports.

26. The method of claim 20, wherein sending the reference signal comprises: The reference signals are sent from the multiple antenna ports using frequency domain multiplexing across multiple frequency combs, time domain multiplexing across multiple symbols, delay domain multiplexing across multiple cyclic shifts, code domain multiplexing, or non-orthogonal code division multiplexing.

27. The method of claim 20, wherein the plurality of measured channel metrics comprises a signal strength metric, a spectral efficiency metric, a rank metric, or any combination thereof.

28. The method of claim 20, wherein the one or more metrics associated with the mobility management for the UE comprises a handover command for the UE.

29. An apparatus for wireless communication at a user equipment (UE), comprising: processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receiving a reference signal associated with a plurality of antenna ports; measuring a multi-dimensional channel response based at least in part on receiving the reference signal, the multi-dimensional channel response being associated with a plurality of measured channel metrics corresponding to the plurality of antenna ports; as well as A report including a channel measurement vector is sent based at least in part on measuring the multi-dimensional channel response, the channel measurement vector indicating the plurality of measured channel metrics for one or more dimensions of the multi-dimensional channel response.

30. An apparatus for wireless communication at a network entity, comprising: processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: transmitting a reference signal associated with a plurality of antenna ports; receiving, based at least in part on the reference signal, a report including a channel measurement vector indicating a plurality of measured channel metrics corresponding to the plurality of antenna ports, wherein the plurality of measured channel metrics are for one or more dimensions of a multi-dimensional channel response based at least in part on the reference signal; as well as A message is sent indicating one or more metrics associated with mobility management for a user equipment (UE) in communication with the network entity based at least in part on the report indicating the channel measurement vector.

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