Determination of co-phase with partitioned csi resources

Abstract

Systems, methods, and instrumentalities are disclosed herein for determining a co-phase with partitioned channel state information (CSI) resources. A device can receive information indicating a first CSI reference signal (CSI-RS) resource associated with a first set of CSI-RS ports and a second CSI resource associated with a second set of CSI-RS ports. The device can receive a CSI-RS on the first CSI-RS resource and the second set of CSI-RS resources. The device can determine a first measurement based on the CSI-RS received on the first CSI-RS resource and a second measurement based on the CSI-RS received on the second CSI-RS resource. The device can determine a first precoding matrix indicator (PMI) based on the first measurement and a second PMI based on the second measurement. The device can transmit a CSI report to a network entity. The CSI report can indicate the first PMI and the second PMI.

Description

[0001] Cross-references to related applications This application claims the benefit of U.S. Provisional Application No. 63 / 546,428, filed October 30, 2023, the contents of which are incorporated herein by reference. Background Technology

[0002] Mobile communication using wireless communication continues to evolve. The fifth generation can be called 5G. The previous generation (traditional) mobile communication can be, for example, the fourth generation (4G) Long Term Evolution (LTE). Summary of the Invention

[0003] This paper describes systems, methods, apparatus, and means for determining and partitioning Channel State Information (CSI) resources in phase.

[0004] A device (e.g., a wireless transmit / receive unit (WTRU)) can receive information indicating a first CSI-RS resource associated with a first set of Channel State Information Reference Signal (CSI-RS) ports and a second CSI-RS resource associated with a second set of CSI-RS ports. The device can receive CSI-RS on both the first and second CSI-RS resources. The device can determine a first measurement based on the CSI-RS received on the first CSI-RS resource and a second measurement based on the CSI-RS received on the second CSI-RS resource. The device can determine a first precoding matrix indicator (PMI) associated with the first CSI-RS resource based on the first measurement and a second PMI associated with the second CSI-RS resource based on the second measurement. The device can send a Channel State Information (CSI) report to a network entity, wherein the CSI report indicates the first and second PMIs.

[0005] The first CSI-RS resource and the second CSI-RS resource can be in (e.g., the same) CSI-RS resource set. The CSI report can indicate a quantified in-phase measurement between the first PMI and the second PMI.

[0006] The first CSI-RS resource may be in a first CSI-RS resource set. The second CSI-RS resource may be in a second CSI-RS resource set different from the first CSI-RS resource set. The CSI report may indicate in-phase measurements across the first PMI and the second PMI.

[0007] The device can determine the first measurement based on a first polarization of the CSI-RS ports in the first CSI-RS port set. The device can determine the second measurement based on a second polarization of the CSI-RS ports in the second CSI-RS port set. The second polarization may be different from the first polarization.

[0008] This information can indicate a third CSI-RS resource associated with a third CSI-RS port set and a fourth CSI-RS resource associated with a fourth CSI-RS port set. The device can receive CSI-RS on the third and fourth CSI-RS resources. The device can determine a third measurement based on the CSI-RS received on the third CSI-RS resource and a fourth measurement based on the CSI-RS received on the fourth CSI-RS resource. The device can determine a third PMI associated with the third CSI-RS resource based on the third measurement and a fourth PMI associated with the fourth CSI-RS resource based on the fourth measurement. The CSI report can indicate the third and fourth PMIs.

[0009] The device can determine, based on a time-based recursive mode, which one or more CSI-RS resources, the first CSI-RS resource and the second CSI-RS resource, on which the CSI-RS is received.

[0010] This information can indicate a third CSI-RS resource associated with the third CSI-RS port set, wherein the second and third CSI-RS resources are multiplexed on at least one of time or frequency resources. The device can aggregate the second and third CSI-RS resources to generate a combined CSI-RS resource. The device can determine the second measurement based on CSI-RS received on the combined CSI-RS resource.

[0011] The CSI-RS can be a first CSI-RS. The CSI report can be a first CSI report. Based on the first CSI-RS resource, the second CSI-RS resource, and the pattern for allocating ports to the CSI-RS resource, the device can determine a third CSI-RS resource associated with the third CSI-RS port set and a fourth CSI-RS resource associated with the fourth CSI-RS port set. The device can receive a second CSI-RS on the third CSI-RS resource and the fourth CSI-RS resource. The device can determine a third measurement based on the second CSI-RS received on the third CSI-RS resource and a fourth measurement based on the second CSI-RS received on the fourth CSI-RS resource. The device can determine a third PMI associated with the third CSI-RS resource based on the third measurement and a fourth PMI associated with the fourth CSI-RS resource based on the fourth measurement. The device can send a second CSI report to the network entity, wherein the second CSI report indicates the third PMI and the fourth PMI.

[0012] The first CSI-RS port set may include a first plurality of ports mapped to the first CSI-RS resource. The second CSI-RS port set may include a second plurality of ports mapped to the second CSI-RS resource. Attached Figure Description

[0013] Furthermore, similar reference numerals in the figures indicate similar elements, and wherein: Figure 1A This is a system diagram illustrating an example communication system in which one or more of the disclosed embodiments may be implemented.

[0014] Figure 1B The illustration shows a method according to one embodiment. Figure 1A The diagram shows a system diagram of an example wireless transmit / receive unit (WTRU) used in a communication system.

[0015] Figure 1C The illustration shows a method according to one embodiment. Figure 1A The diagram illustrates a system diagram of an example radio access network (RAN) and an example core network (CN) used in the communication system.

[0016] Figure 1D The illustration shows a method according to one embodiment. Figure 1A The illustrated system diagram shows yet another example RAN and yet another example CN used in the communication system.

[0017] Figure 2A and 2BThe illustration shows an example technique by which WTRU searches for and reports precoded matrix indicators (PMIs) from a constrained subset of codebooks.

[0018] Figure 3 The illustration shows an example technique for WTRU to determine in-phase with the Channel State Information (CSI) resources of a partition.

[0019] Figure 4 The illustration shows an example technique used by WTRU to determine PMI and in-phase information associated with CSI resources.

[0020] Figure 5 An example of a technique for identifying a subset of CSI ports based on the associated Transport Configuration Indicator (TCI) status is illustrated.

[0021] Figure 6 The illustration shows an example technique used for CSI reporting. Detailed Implementation

[0022] Figure 1A This is a schematic diagram illustrating an example communication system 100 in which one or more of the disclosed embodiments may be implemented. The communication system 100 may be a multi-access system that provides content such as voice, data, video, messages, and broadcasts to multiple wireless users. The communication system 100 enables multiple wireless users to access such content by sharing system resources, including wireless bandwidth. For example, the communication system 100 may employ one or more channel access methods, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal FDMA (OFDMA), Single Carrier FDMA (SC-FDMA), Zero-Tail Unique Word DFT Spread Spectrum OFDM (ZT UWDTS-s OFDM), Unique Word OFDM (UW-OFDM), Resource Block Filtered OFDM, Filter Bank Multicarrier (FBMC), etc.

[0023] like Figure 1AAs shown, the communication system 100 may include wireless transmit / receive units (WTRUs) 102a, 102b, 102c, 102d, RAN 104 / 113, CN 106 / 115, Public Switched Telephone Network (PSTN) 108, Internet 110, and other networks 112. However, it should be understood that the disclosed embodiments contemplate any number of WTRUs, base stations, networks, and / or network elements. Each of the WTRUs 102a, 102b, 102c, and 102d may be any type of device configured to operate and / or communicate in a wireless environment. For example, WTRUs 102a, 102b, 102c, and 102d (any of which may be referred to as a “station” and / or “STA”) may be configured to transmit and / or receive wireless signals and may include user equipment (WTRU), mobile stations, fixed or mobile subscriber units, subscription-based units, pagers, cellular phones, personal digital assistants (PDAs), smartphones, laptops, netbooks, personal computers, wireless sensors, hotspots or Mi-Fi devices, Internet of Things (IoT) devices, watches or other wearable devices, head-mounted displays (HMDs), vehicles, drones, medical devices and applications (e.g., remote surgery), industrial devices and applications (e.g., robots and / or other wireless devices operating in industrial and / or automated processing chain environments), consumer electronics devices, devices operating on commercial and / or industrial wireless networks, etc. Any of WTRUs 102a, 102b, 102c, and 102d may be interchangeably referred to as WTRUs.

[0024] The communication system 100 may also include base station 114a and / or base station 114b. Each of base stations 114a and 114b may be any type of device configured to wirelessly interface with at least one of WTRUs 102a, 102b, 102c, and 102d to facilitate access to one or more communication networks, such as CN 106 / 115, the Internet 110, and / or other networks 112. For example, base stations 114a and 114b may be base transceiver stations (BTS), node B, eNode B, home node B, home eNode B, gNB, NR node B, site controller, access point (AP), wireless router, etc. Although base stations 114a and 114b are each depicted as a single element, it should be understood that base stations 114a and 114b may include any number of interconnected base stations and / or network elements.

[0025] Base station 114a may be part of RAN 104 / 113, which may also include other base stations and / or network elements (not shown), such as base station controllers (BSCs), radio network controllers (RNCs), relay nodes, etc. Base station 114a and / or base station 114b may be configured to transmit and / or receive radio signals on one or more carrier frequencies, which may be referred to as cells (not shown). These frequencies may be in licensed spectrum, unlicensed spectrum, or a combination of licensed and unlicensed spectrum. A cell may provide coverage of a specific geographic area, which may be relatively fixed or may change over time. The cell may be further divided into cell sectors. For example, the cell associated with base station 114a may be divided into three sectors. Therefore, in one embodiment, base station 114a may include three transceivers, i.e., one transceiver for each sector of the cell. In one embodiment, base station 114a may employ multiple-input multiple-output (MIMO) technology and may use multiple transceivers for each sector of the cell. For example, beamforming can be used to transmit and / or receive signals in a desired spatial direction.

[0026] Base stations 114a and 114b can communicate with one or more of WTRUs 102a, 102b, 102c, and 102d via air interface 116. Air interface 116 can be any suitable wireless communication link (e.g., radio frequency (RF), microwave, centimeter wave, micrometer wave, infrared (IR), ultraviolet (UV), visible light, etc.). Any suitable radio access technology (RAT) can be used to establish air interface 116.

[0027] More specifically, as described above, the communication system 100 can be a multi-access system and can employ one or more channel access schemes, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, etc. For example, base stations 114a and WTRUs 102a, 102b, and 102c in RAN 104 / 113 can implement radio technologies such as Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (UTRA), which can establish air interfaces 115 / 116 / 117 using Wideband CDMA (WCDMA). WCDMA may include communication protocols such as High-Speed ​​Packet Access (HSPA) and / or evolved HSPA (HSPA+). HSPA may include High-Speed ​​Downlink (DL) Packet Access (HSDPA) and / or High-Speed ​​UL Packet Access (HSUPA).

[0028] In one embodiment, base station 114a and WTRUs 102a, 102b, 102c may implement radio technologies such as evolved UMTS terrestrial radio access (E-UTRA), which may use Long Term Evolution (LTE) and / or Advanced LTE (LTE-A) and / or Advanced LTE Pro (LTE-A Pro) to establish air interface 116.

[0029] In one embodiment, base station 114a and WTRUs 102a, 102b, 102c can implement radio technologies such as NR radio access, which can establish an air interface 116 using a new radio (NR).

[0030] In one embodiment, base station 114a and WTRUs 102a, 102b, and 102c can implement multiple radio access technologies. For example, base station 114a and WTRUs 102a, 102b, and 102c can jointly implement LTE radio access and NR radio access, for example, using the dual connectivity (DC) principle. Therefore, the air interface used by WTRUs 102a, 102b, and 102c can be characterized by multiple types of radio access technologies and / or transmissions sent to / from multiple types of base stations (e.g., eNBs and gNBs).

[0031] In other embodiments, base station 114a and WTRUs 102a, 102b, 102c can implement radio technologies such as IEEE 802.11 (i.e., Wi-Fi), IEEE 802.16 (i.e., WiMAX), CDMA2000, CDMA2000 1X, CDMA2000 EV-DO, Provisional Standard 2000 (IS-2000), Provisional Standard 95 (IS-95), Provisional Standard 856 (IS-856), Global System for Mobile Communications (GSM), Enhanced Data Rate GSM Evolution (EDGE), GSM EDGE (GERAN), etc.

[0032] For example, Figure 1ABase station 114b can be a wireless router, home node B, home eNodeB, or access point, and can utilize any suitable RAT to facilitate wireless connectivity in a local area, such as commercial locations, homes, vehicles, campuses, industrial facilities, air corridors (e.g., for drone use), roads, etc. In one embodiment, base station 114b and WTRUs 102c, 102d can implement radio technologies such as IEEE 802.11 to establish a wireless local area network (WLAN). In one embodiment, base station 114b and WTRUs 102c, 102d can implement radio technologies such as IEEE 802.15 to establish a wireless personal area network (WPAN). In yet another embodiment, base station 114b and WTRUs 102c, 102d can utilize cellular-based RATs (e.g., WCDMA, CDMA2000, GSM, LTE, LTE-A, LTE-A Pro, NR, etc.) to establish picocells or femtocells. Figure 1A As shown, base station 114b can be directly connected to the Internet 110. Therefore, base station 114b may not need to access the Internet 110 via CN 106 / 115.

[0033] RAN 104 / 113 can communicate with CN 106 / 115, which can be any type of network configured to provide voice, data, application, and / or Voice over Internet Protocol (VoIP) services to one or more of WTRUs 102a, 102b, 102c, and 102d. Data can have different Quality of Service (QoS) requirements, such as different throughput requirements, latency requirements, fault tolerance requirements, reliability requirements, data throughput requirements, mobility requirements, etc. CN 106 / 115 can provide call control, billing services, location-based services, prepaid calling, internet connectivity, video distribution, and / or perform advanced security functions such as user authentication. Although in Figure 1A Although not shown, it should be understood that RAN104 / 113 and / or CN 106 / 115 can communicate directly or indirectly with other RANs that use the same RAT as or a different RAT than RAN 104 / 113. For example, in addition to being connected to RAN 104 / 113, which may utilize NR radio technology, CN 106 / 115 can also communicate with another RAN (not shown) that uses GSM, UMTS, CDMA 2000, WiMAX, E-UTRA, or WiFi radio technology.

[0034] CN 106 / 115 can also serve as a gateway for WTRU 102a, 102b, 102c, 102d to access PSTN 108, the Internet 110, and / or other networks 112. PSTN 108 may include a circuit-switched telephone network providing Common Old-Style Telephone Service (POTS). The Internet 110 may include a global system of interconnected computer networks and devices using common communication protocols such as Transmission Control Protocol (TCP), User Datagram Protocol (UDP), and / or Internet Protocol (IP) from the TCP / IP Internet Protocol suite. Network 112 may include wired and / or wireless communication networks owned and / or operated by other service providers. For example, network 112 may include another CN connected to one or more RANs, which may use the same RAT as RAN 104 / 113 or a different RAT.

[0035] Some or all of the WTRUs 102a, 102b, 102c, and 102d in the communication system 100 may include multi-mode capabilities (e.g., WTRUs 102a, 102b, 102c, and 102d may include multiple transceivers for communicating with different wireless networks via different wireless links). For example... Figure 1A The WTRU 102c shown can be configured to communicate with base station 114a, which may employ cellular-based radio technology, and to communicate with base station 114b, which may employ IEEE 802 radio technology.

[0036] Figure 1B This is a system diagram illustrating example WTRU 102. (Example:) Figure 1B As shown, among other things, WTRU 102 may include, in particular, a processor 118, a transceiver 120, a transmit / receive element 122, a speaker / microphone 124, a keypad 126, a display / touchpad 128, non-removable memory 130, removable memory 132, a power supply 134, a global positioning system (GPS) chipset 136, and / or other peripheral devices 138, etc. It should be understood that WTRU 102 may include any sub-combination of the foregoing elements while remaining consistent with the embodiments.

[0037] Processor 118 may be a general-purpose processor, a special-purpose processor, a conventional processor, a digital signal processor (DSP), multiple microprocessors, one or more microprocessors associated with a DSP core, a controller, a microcontroller, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) circuit, any other type of integrated circuit (IC), a state machine, etc. Processor 118 may perform signal encoding, data processing, power control, input / output processing, and / or any other functions that enable WTRU 102 to operate in a wireless environment. Processor 118 may be coupled to transceiver 120, which may be coupled to transmitting / receiving element 122. Although Figure 1B The processor 118 and transceiver 120 are depicted as separate components, but it should be understood that the processor 118 and transceiver 120 may be integrated together in an electronic package or chip.

[0038] Transmitting / receiving element 122 can be configured to transmit signals to or receive signals from a base station (e.g., base station 114a) over air interface 116. For example, in one embodiment, transmitting / receiving element 122 can be an antenna configured to transmit and / or receive RF signals. In one embodiment, transmitting / receiving element 122 can be, for example, a transmitter / detector configured to transmit and / or receive IR, UV, or visible light signals. In yet another embodiment, transmitting / receiving element 122 can be configured to transmit and / or receive both RF and optical signals. It should be understood that transmitting / receiving element 122 can be configured to transmit and / or receive any combination of wireless signals.

[0039] Although the transmitting / receiving element 122 is in Figure 1B While depicted as a single element, WTRU 102 may include any number of transmit / receive elements 122. More specifically, WTRU 102 may employ MIMO technology. Thus, in one embodiment, WTRU 102 may include two or more transmit / receive elements 122 (e.g., multiple antennas) for transmitting and receiving wireless signals on air interface 116.

[0040] Transceiver 120 can be configured to modulate signals transmitted by transmitting / receiving element 122 and demodulate signals received by transmitting / receiving element 122. As described above, WTRU 102 can have multi-mode capability. Therefore, for example, transceiver 120 may include multiple transceivers to enable WTRU 102 to communicate via multiple RATs, such as, for example, NR and IEEE 802.11.

[0041] The processor 118 of WTRU 102 can be coupled to a speaker / microphone 124, a keypad 126, and / or a display / touchpad 128 (e.g., a liquid crystal display (LCD) unit or an organic light-emitting diode (OLED) display unit) and can receive user input data therefrom. The processor 118 can also output user data to the speaker / microphone 124, keypad 126, and / or display / touchpad 128. Furthermore, the processor 118 can access and store information from any type of suitable memory, such as non-removable memory 130 and / or removable memory 132. Non-removable memory 130 may include random access memory (RAM), read-only memory (ROM), a hard disk, or any other type of memory storage device. Removable memory 132 may include a user identification module (SIM) card, memory stick, secure digital storage (SD) card, etc. In other embodiments, the processor 118 can access and store information from memory that is not physically located on WTRU 102 (e.g., a server or home computer (not shown)).

[0042] The processor 118 can receive power from the power supply 134 and can be configured to distribute and / or control power to other components in the WTRU 102. The power supply 134 can be any suitable device that powers the WTRU 102. For example, the power supply 134 may include one or more dry cell batteries (e.g., nickel-cadmium (NiCd), nickel-zinc (NiZn), nickel metal hydride (NiMH), lithium-ion (Li-ion), etc.), solar cells, fuel cells, etc.

[0043] The processor 118 may also be coupled to a GPS chipset 136, which may be configured to provide location information (e.g., longitude and latitude) about the current location of the WTRU 102. In addition to, or instead of, information from the GPS chipset 136, the WTRU 102 may receive location information on the air interface 116 from base stations (e.g., base stations 114a, 114b) and / or determine its location based on the timing of signals received from two or more nearby base stations. It should be understood that the WTRU 102 may acquire location information using any suitable location determination method while remaining consistent with the embodiments.

[0044] The processor 118 may be further coupled to other peripheral devices 138, which may include one or more software and / or hardware modules providing additional features, functions, and / or wired or wireless connectivity. For example, peripheral devices 138 may include accelerometers, electronic compasses, satellite transceivers, digital cameras (for photos and / or videos), Universal Serial Bus (USB) ports, vibration devices, television transceivers, hands-free headsets, Bluetooth® modules, FM radio units, digital music players, media players, video game player modules, internet browsers, virtual reality and / or augmented reality (VR / AR) devices, activity trackers, etc. Peripheral devices 138 may include one or more sensors, which may be one or more of the following: gyroscopes, accelerometers, Hall effect sensors, magnetometers, orientation sensors, proximity sensors, temperature sensors, time sensors; geolocation sensors, altimeters, light sensors, touch sensors, magnetometers, barometers, attitude sensors, biosensors, and / or humidity sensors.

[0045] WTRU 102 may include a full-duplex radio for which the transmission and reception of some or all signals (e.g., signals associated with specific subframes for UL (e.g., for transmission) and downlink (e.g., for reception)) may be concurrent and / or simultaneous. The full-duplex radio may include an interference management unit to reduce and / or substantially eliminate self-interference via hardware (e.g., chokes) or via signal processing by a processor (e.g., a separate processor (not shown) or via processor 118). In one embodiment, WTRU 102 may include a half-duplex radio for which the transmission and reception of some or all signals (e.g., signals associated with specific subframes for UL (e.g., for transmission) or downlink (e.g., for reception)) may be concurrent and / or simultaneous.

[0046] Figure 1C This diagram illustrates a system diagram of RAN 104 and CN 106 according to an embodiment. As described above, RAN 104 can communicate with WTRUs 102a, 102b, and 102c via air interface 116 using E-UTRA radio technology. RAN 104 can also communicate with CN 106.

[0047] RAN 104 may include eNode-Bs 160a, 160b, and 160c; however, it should be understood that RAN 104 may include any number of eNode-Bs while remaining consistent with the embodiments. eNode-Bs 160a, 160b, and 160c may each include one or more transceivers for communicating with WTRUs 102a, 102b, and 102c on air interface 116. In one embodiment, eNode-Bs 160a, 160b, and 160c may implement MIMO technology. Therefore, for example, eNode-B 160a may use multiple antennas to transmit and / or receive radio signals from WTRU 102a.

[0048] Each of the eNode-B 160a, 160b, and 160c can be associated with a specific cell (not shown) and can be configured to handle radio resource management decisions, handover decisions, user scheduling in UL and / or DL, etc. Figure 1C As shown, eNode-B 160a, 160b, and 160c can communicate with each other on the X2 interface.

[0049] Figure 1C The CN 106 shown may include a Mobility Management Entity (MME) 162, a Serving Gateway (SGW) 164, and a Packet Data Network (PDN) Gateway (or PGW) 166. While each of the foregoing elements is described as part of CN 106, it should be understood that any of these elements may be owned and / or operated by an entity other than a CN operator.

[0050] The MME 162 can connect to each of the eNode-Bs 162a, 162b, and 162c in RAN 104 via the S1 interface and can act as a control node. For example, the MME 162 can be responsible for authenticating users of WTRUs 102a, 102b, and 102c, bearer activation / deactivation, selecting a specific serving gateway during the initial attachment of WTRUs 102a, 102b, and 102c, etc. The MME 162 can provide control plane functions for handover between RAN 104 and other RANs (not shown) employing other radio technologies such as GSM and / or WCDMA.

[0051] The SGW 164 can connect to each of the eNode Bs 160a, 160b, and 160c in RAN 104 via the S1 interface. The SGW 164 can typically route and forward user data packets to / from WTRUs 102a, 102b, and 102c. The SGW 164 can perform other functions, such as anchoring the user plane during inter-eNode B handover, triggering paging when DL data is available for WTRUs 102a, 102b, and 102c, and managing and storing the context of WTRUs 102a, 102b, and 102c.

[0052] SGW 164 can connect to PGW 166, which can provide WTRU 102a, 102b, 102c with access to packet-switched networks such as Internet 110, so as to facilitate communication between WTRU 102a, 102b, 102c and IP-enabled devices.

[0053] CN 106 can facilitate communication with other networks. For example, CN 106 can provide WTRU 102a, 102b, and 102c with access to a circuit-switched network such as PSTN 108, facilitating communication between WTRU 102a, 102b, and 102c and traditional landline communication equipment. For example, CN 106 may include, or be able to communicate with, an IP gateway (e.g., an IP Multimedia Subsystem (IMS) server) that acts as an interface between CN 106 and PSTN 108. Furthermore, CN 106 can provide WTRU 102a, 102b, and 102c with access to other networks 112, which may include other wired and / or wireless networks owned and / or operated by other service providers.

[0054] Despite WTRU in Figure 1A-1D While described as a wireless terminal, it is conceivable that, in some representative embodiments, such a terminal may use (e.g., temporarily or permanently) a wired communication interface with a communication network.

[0055] In a representative embodiment, another network 112 may be a WLAN.

[0056] A WLAN in Infrastructure Basic Services Set (BSS) mode can have an access point (AP) for the BSS and one or more stations (STAs) associated with the AP. The AP can access or interface with a distributed system (DS) or another type of wired / wireless network that transmits traffic to and / or out of the BSS. Traffic originating outside the BSS destined for a STA can reach and be delivered to the STA via the AP. Traffic originating from a STA destined for an external BSS can be sent to the AP for delivery to the appropriate destination. For example, traffic between STAs within the BSS can be transmitted via the AP, where the source STA can send traffic to the AP, and the AP can deliver traffic to the destination STA. Traffic between STAs within the BSS can be considered and / or referred to as peer-to-peer traffic. Peer-to-peer traffic can be transmitted between source and destination STAs (e.g., directly between them) using Direct Link Establishment (DLS). In some representative embodiments, the DLS can use 802.11e DLS or 802.11z Tunneled DLS (TDLS). A WLAN using the Standalone BSS (IBSS) mode may not have an access point (AP), and STAs within the IBSS or using the IBSS (e.g., all STAs) can communicate directly with each other. The IBSS communication mode is sometimes referred to here as an "ad-hoc" communication mode.

[0057] When using 802.11ac infrastructure operating mode or a similar operating mode, the AP can transmit beacons on a fixed channel, such as the primary channel. The primary channel can be of a fixed width (e.g., a wide bandwidth of 20 MHz) or dynamically set via signaling. The primary channel can be the operating channel of the BSS and can be used by the STA to establish a connection with the AP. In some representative embodiments, such as in an 802.11 system, Carrier Sense Multiple Access (CSMA / CA) with collision avoidance can be implemented. For CSMA / CA, each STA, including the AP, can sense the primary channel. If a particular STA senses / detects and / or determines that the primary channel is busy, that particular STA can back off. A single STA (e.g., only one station) can transmit at any given time within a given BSS.

[0058] High-throughput (HT) STAs can communicate using a 40 MHz wide channel, for example, by combining a primary 20 MHz channel with adjacent or non-adjacent 20 MHz channels.

[0059] Very High Throughput (VHT) STAs can support channels with widths of 20 MHz, 40 MHz, 80 MHz, and / or 160 MHz. 40 MHz and / or 80 MHz channels can be formed by combining consecutive 20 MHz channels. A 160 MHz channel can be formed by combining eight consecutive 20 MHz channels, or by combining two non-consecutive 80 MHz channels, which can be referred to as an 80+80 configuration. For the 80+80 configuration, after channel coding, the data passes through a segment resolver, which divides the data into two streams. Each stream can be processed separately using Inverse Fast Fourier Transform (IFFT) and time-domain processing. These streams can be mapped onto two 80 MHz channels, and the data can be transmitted by the transmitting STA. At the receiver of the receiving STA, the operation of the 80+80 configuration can be reversed, and the combined data can be sent to the Media Access Control (MAC).

[0060] 802.11af and 802.11ah support operating modes below 1 GHz. The channel operating bandwidth and carrier in 802.11af and 802.11ah are reduced compared to those used in 802.11n and 802.11ac. 802.11af supports 5 MHz, 10 MHz, and 20 MHz bandwidths in the TV whitespace (TVWS) spectrum, while 802.11ah supports 1 MHz, 2 MHz, 4 MHz, 8 MHz, and 16 MHz bandwidths using non-TVWS spectrum. According to a representative embodiment, 802.11ah can support metering-type control / machine-type communications, such as MTC devices in macro coverage areas. MTC devices may have certain capabilities, such as limited capabilities, including support for (e.g., only) certain and / or limited bandwidths. MTC devices may include batteries with a battery life exceeding a threshold (e.g., to maintain a very long battery life).

[0061] WLAN systems that can support multiple channels and channel bandwidths, such as 802.11n, 802.11ac, 802.11af, and 802.11ah, include channels that can be designated as the primary channel. The bandwidth of the primary channel can be equal to the maximum common operating bandwidth supported by all STAs in the BSS. The bandwidth of the primary channel can be set and / or limited by the STA among all STAs operating in the BSS that supports the minimum bandwidth operating mode. In the example of 802.11ah, for STAs that support (e.g., only support) the 1 MHz mode (e.g., MTC type devices), the primary channel can be 1 MHz wide, even if the AP and other STAs in the BSS support 2 MHz, 4 MHz, 8 MHz, 16 MHz, and / or other channel bandwidth operating modes. Carrier Sense and / or Network Allocation Vector (NAV) settings may depend on the status of the primary channel. If the primary channel is busy, for example, because an STA (which only supports the 1 MHz operating mode) is transmitting to the AP, the entire available band can be considered busy, even if most of the available band remains idle and can be available.

[0062] In the United States, the available frequency band for 802.11ah is from 902 MHz to 928 MHz. In South Korea, the available frequency band is from 917.5 MHz to 923.5 MHz. In Japan, the available frequency band is from 916.5 MHz to 927.5 MHz. The total available bandwidth for 802.11ah is 6 MHz to 26 MHz, depending on the country code.

[0063] Figure 1D This diagram illustrates a system diagram of RAN 113 and CN 115 according to one embodiment. As described above, RAN 113 can communicate with WTRUs 102a, 102b, and 102c via air interface 116 using NR radio technology. RAN 113 can also communicate with CN 115.

[0064] RAN 113 may include gNBs 180a, 180b, and 180c; however, it should be understood that RAN 113 may include any number of gNBs while remaining consistent with the embodiments. gNBs 180a, 180b, and 180c may each include one or more transceivers for communicating with WTRUs 102a, 102b, and 102c on air interface 116. In one embodiment, gNBs 180a, 180b, and 180c may implement MIMO technology. For example, gNBs 180a and 180b may utilize beamforming to transmit signals to and / or receive signals from gNBs 180a, 180b, and 180c. Therefore, for example, gNB 180a may use multiple antennas to transmit radio signals to and / or receive radio signals from WTRU 102a. In one embodiment, gNBs 180a, 180b, and 180c can implement carrier aggregation technology. For example, gNB 180a can transmit multiple component carriers (not shown) to WTRU 102a. A subset of these component carriers can be on unlicensed spectrum, while the remaining component carriers can be on licensed spectrum. In one embodiment, gNBs 180a, 180b, and 180c can implement Coordinated Multipoint (CoMP) technology. For example, WTRU 102a can receive coordinated transmissions from gNBs 180a and 180b (and / or gNB 180c).

[0065] WTRUs 102a, 102b, and 102c can communicate with gNBs 180a, 180b, and 180c using transmissions associated with scalable digitization. For example, the OFDM symbol spacing and / or OFDM subcarrier spacing can differ for different transmissions, different cells, and / or different portions of the radio transmission spectrum. WTRUs 102a, 102b, and 102c can communicate with gNBs 180a, 180b, and 180c using subframes or transmission time intervals (TTIs) of various or scalable lengths (e.g., containing a variable number of OFDM symbols and / or a continuously variable absolute time).

[0066] gNBs 180a, 180b, and 180c can be configured to communicate with WTRUs 102a, 102b, and 102c in standalone and / or non-standalone configurations. In standalone configuration, WTRUs 102a, 102b, and 102c can communicate with gNBs 180a, 180b, and 180c without accessing other RANs (e.g., eNode-Bs 160a, 160b, and 160c). In standalone configuration, WTRUs 102a, 102b, and 102c can utilize one or more of gNBs 180a, 180b, and 180c as mobility anchors. In standalone configuration, WTRUs 102a, 102b, and 102c can communicate with gNBs 180a, 180b, and 180c using signals in unlicensed frequency bands. In a non-standalone configuration, WTRUs 102a, 102b, and 102c can communicate / connect with gNBs 180a, 180b, and 180c, while also communicating / connecting with another RAN such as eNode-Bs 160a, 160b, and 160c. For example, WTRUs 102a, 102b, and 102c can implement DC principles to communicate substantially simultaneously with one or more gNBs 180a, 180b, and 180c, as well as one or more eNode-Bs 160a, 160b, and 160c. In a non-standalone configuration, eNode-Bs 160a, 160b, and 160c can act as mobility anchors for WTRUs 102a, 102b, and 102c, and gNBs 180a, 180b, and 180c can provide additional coverage and / or throughput for serving WTRUs 102a, 102b, and 102c.

[0067] Each of gNBs 180a, 180b, and 180c can be associated with a specific cell (not shown) and can be configured to handle radio resource management decisions, handover decisions, user scheduling in UL and / or DL, network slicing support, dual connectivity, interoperability between NR and E-UTRA, routing user plane data to User Plane Functions (UPF) 184a and 184b, and routing control plane information to Access and Mobility Management Functions (AMF) 182a and 182b, etc. Figure 1D As shown, gNB 180a, 180b, and 180c can communicate with each other on the Xn interface.

[0068] Figure 1DThe CN 115 shown may include at least one AMF 182a, 182b, at least one UPF 184a, 184b, at least one Session Management Function (SMF) 183a, 183b, and possibly a Data Network (DN) 185a, 185b. Although each of the foregoing elements is depicted as part of the CN 115, it should be understood that any of these elements may be owned and / or operated by an entity other than a CN operator.

[0069] AMF 182a and 182b can connect to one or more gNBs 180a, 180b, and 180c in RAN 113 via the N2 interface and can act as control nodes. For example, AMF 182a and 182b can be responsible for authenticating users of WTRU 102a, 102b, and 102c, supporting network slicing (e.g., handling different PDU sessions with different requirements), selecting specific SMF 183a and 183b, managing registration areas, terminating NAS signaling, mobility management, and so on. AMF 182a and 182b can use network slicing to customize CN support for WTRU 102a, 102b, and 102c based on the service types used by WTRU 102a, 102b, and 102c. For example, different network slices can be established for different use cases, such as services relying on Ultra Reliable Low Latency Time (URLLC) access, services relying on Enhanced Massive Mobile Broadband (eMBB) access, services for Machine Type Communication (MTC) access, and / or so on. AMF 162 can provide control plane functions for handover between RAN 113 and other RANs (not shown) employing other radio technologies such as LTE, LTE-A, LTE-A Pro and / or non-3GPP access technologies such as WiFi.

[0070] SMFs 183a and 183b can connect to AMFs 182a and 182b in CN 115 via the N11 interface. SMFs 183a and 183b can also connect to UPFs 184a and 184b in CN 115 via the N4 interface. SMFs 183a and 183b can select and control UPFs 184a and 184b, and configure the routing of services through UPFs 184a and 184b. SMFs 183a and 183b can perform other functions, such as managing and allocating WTRU IP addresses, managing PDU sessions, controlling policy enforcement and QoS, and providing downlink data notifications. PDU session types can be IP-based, non-IP-based, Ethernet-based, etc.

[0071] UPF 184a and 184b can be connected to one or more gNBs 180a, 180b, and 180c in RAN 113 via the N3 interface. This N3 interface provides WTRU 102a, 102b, and 102c with access to packet-switched networks (such as Internet 110) to facilitate communication between WTRU 102a, 102b, 102c and IP-enabled devices. UPF 184 and 184b can perform other functions such as routing and forwarding packets, enforcing user plane policies, supporting multi-homed PDU sessions, handling user plane QoS, buffering downlink packets, and providing mobility anchoring.

[0072] CN 115 can facilitate communication with other networks. For example, CN 115 may include, or be able to communicate with, an IP gateway (e.g., an IP Multimedia Subsystem (IMS) server) that acts as an interface between CN 115 and PSTN 108. Furthermore, CN 115 can provide WTRUs 102a, 102b, and 102c with access to other networks 112, which may include other wired and / or wireless networks owned and / or operated by other service providers. In one embodiment, WTRUs 102a, 102b, and 102c may be connected to local data networks (DNs) 185a and 185b via the N3 interface to UPFs 184a and 184b and the N6 interface between UPFs 184a and 184b and DNs 185a and 185b.

[0073] Given Figure 1A-1D as well as Figure 1A-1D The corresponding descriptions herein indicate that one or more of the following functions can be performed by one or more emulation devices (not shown): WTRU 102a-d, base station 114a-b, eNode-B 160a-c, MME 162, SGW 164, PGW 166, gNB 180a-c, AMF 182a-b, UPF 184a-b, SMF183a-b, DN 185a-b, and / or any other device(s) described herein. An emulation device can be one or more devices configured to emulate one or more of the functions described herein. For example, an emulation device can be used to test other devices and / or simulate network and / or WTRU functions.

[0074] Simulation devices can be designed to perform tests on one or more other devices in laboratory and / or carrier network environments. For example, one or more simulation devices can perform one or more or all functions while being fully or partially implemented and / or deployed as part of a wired and / or wireless communication network to test other devices within the communication network. One or more simulation devices can perform one or more or all functions while being temporarily implemented / deployed as part of a wired and / or wireless communication network. Simulation devices can be directly coupled to another device for testing purposes and / or can perform tests using over-the-air wireless communication.

[0075] One or more simulation devices may perform one or more functions, including all functions, rather than being implemented / deployed as part of a wired and / or wireless communication network. For example, simulation devices may be used to test test scenarios in laboratory and / or non-deployment (e.g., testing) wired and / or wireless communication networks to implement the testing of one or more components. One or more simulation devices may be test devices. Simulation devices may transmit and / or receive data using direct RF coupling and / or wireless communication via RF circuitry (e.g., which may include one or more antennas).

[0076] In examples (e.g., in multiple-input multiple-output (MIMO)), the maximum number of CSI-RS ports can be increased from 32 to 64 with high probability (e.g., to efficiently measure the channel and provide a narrower beam for each user).

[0077] Larger antenna arrays (e.g., with more transmit (TX)) can be used for higher-order spatial multiplexing (e.g., for multi-user MIMO (MU-MIMO)). Narrower beams (e.g., and therefore higher throughput) can be used for multiple users. Codebook constraints can be used to provide less overhead.

[0078] Multiple (e.g., 64) CSI-RS ports can be used. In some examples, the maximum number of CSI-RS ports can be 32. To provide more TX for higher-order space multiplexing (e.g., for MU-MIMO), the maximum can be increased to 64 ports. Increasing the number of CSI-RS ports may introduce increased CSI feedback overhead and complexity at the WTRU. CSI-RS resources can be designed with limited overhead.

[0079] The number of CSI-RS ports can be capped (e.g., 64 ports). The WTRU can receive CSI-RS with a 64-port configuration using a beam grid (GoB). The WTRU can receive PUCCH resource configurations. The WTRU can measure the channel with 64 CSI-RS ports. The WTRU can report the precoding matrix indicator (PMI), rank indicator (RI), and / or channel quality indicator (CQI) to the network entity (e.g., gNB). The WTRU can select the optimal beam. The WTRU can report the optimal beam to the gNB. For example, the WTRU can determine a first cost associated with a third beam in the second search space and a second cost associated with a fourth beam in the second search space. The WTRU can select either the third or fourth beam (e.g., as the second beam) based on the first and second costs.

[0080] The maximum number of CSI-RS resources can be 32 ports. To serve a larger number of WTRUs with narrower beams, the maximum can be increased to 64 ports. As the array grows, spatial properties may no longer be consistent across the array (e.g., from the perspective of the WTRU). A WTRU may see more than two separate analog beams from the gNB. (e.g., a single) analog beam may not be an accurate representation of the entire array.

[0081] Increasing the maximum number of CSI-RS ports to 64 may have one or more effects. Techniques can be designed in this way to reduce feedback overhead. CSI-RS ports can be partitioned to facilitate in-phase measurements between ports. The array of ports (e.g., all ports) can be measured efficiently (e.g., without new design or procedures).

[0082] As used herein, the terms 'a' and 'one', and similar phrases, shall be interpreted as 'one or more' and 'at least one'. Similarly, any term ending with the suffix '(one or more)(s)' shall be interpreted as 'one or more' and 'at least one'. The term 'may' shall be interpreted as 'may, for example'.

[0083] Unless otherwise specified, the slash ' / ' symbol, sign or mark shall be interpreted as 'and / or' (e.g., 'A / B' may mean 'A and / or B').

[0084] This document provides an example definition of a beam. A WTRU can transmit or receive a physical channel or reference signal based on at least one spatial domain filter. The term "beam" can be used to refer to a spatial domain filter.

[0085] A WTRU can use a spatial domain filter (e.g., the same spatial domain filter used to receive RS (such as CSI-RS) or synchronization signal (SS) blocks) to transmit a physical channel or signal. The WTRU transmission can be referred to as the "target". The received RS or SS block can be referred to as the "reference" or "source". In this case, it can be said that the WTRU transmits the target physical channel or signal based on the spatial relationship of such RS or SS blocks.

[0086] The WTRU can transmit a first physical channel or signal based on a spatial domain filter (e.g., the same spatial domain filter used to transmit the second physical channel or signal). The first transmission and the second transmission can be referred to as the "target" and the "reference" (or "source"), respectively. In this case, it can be said that the WTRU transmits the first (target) physical channel or signal based on the spatial relationship of the reference second (reference) physical channel or signal.

[0087] Spatial relationships can be implicit, configured by the RRC, or signaled by the MAC CE or DCI. For example, the WTRU can implicitly transmit the DM-RS of the PUSCH and PUSCH based on a spatial domain filter (e.g., the same spatial domain filter as the SRS indicated by the SRS Resource Indicator (SRI) configured by the DCI or the RRC). In another example, spatial relationships can be configured by the RRC for the SRI or signaled by the MAC CE for the PUCCH. This spatial relationship can be referred to as a "beam indication".

[0088] The WTRU can receive the first (target) downlink channel or signal based on the same spatial domain filters or spatial reception parameters as the second (reference) downlink channel or signal. For example, this association can exist between a physical channel such as PDCCH or PDSCH and its respective DM-RS. If the first and second signals are reference signals, the association can exist if the WTRU is configured to have a Quasi-Cooperative Positioning (QCL) assumption type D between the corresponding antenna ports. Such an association can be configured as a Transmission Configuration Indicator (TCI) state. The WTRU can receive an indication of the association between the CSI-RS or SS block and the DM-RS via an index of a set of TCI states configured by the RRC and / or signaled by the MAC CE. This indication can be referred to as a "beam indication".

[0089] This document provides one or more features associated with a unified TCI. A unified TCI (e.g., common TCI, common beam, common RS, etc.) can refer to a beam / RS intended (e.g., simultaneously) for multiple physical channels / signals. The term "TCI" can refer to a TCI state that includes at least one source RS to provide a reference (e.g., WTRU assumption) for determining the QCL and / or spatial filter.

[0090] The WTRU can (e.g., from the gNB) receive an indication of a first unified TCI to be used / applied to downlink control channels (e.g., PDCCH) and downlink shared channels (e.g., PDSCH) (e.g., and downlink RS). One or more source reference signals in the first unified TCI can provide common QCL information for WTRU-specific reception at least on the PDSCH and one or more CORESETs (e.g., all or a subset thereof) in the component carriers (CC). The WTRU can (e.g., from the gNB) receive an indication of a second unified TCI to be used / applied to uplink control channels (e.g., PUCCH) and uplink shared channels (e.g., PUSCH) (e.g., and uplink RS). One or more source reference signals in the second unified TCI can provide a reference for determining one or more common UL TX spatial filters for at least the PUSCH based on dynamic grant / configuration grant in the CC and one or more dedicated PUCCH resources (e.g., all or a subset thereof).

[0091] The WTRU can be configured with a first mode for unified TCI (e.g., a separate DLULTCI mode). The indicated unified TCI (e.g., a first unified TCI or a second unified TCI) can be applied to the downlink (e.g., based on the first unified TCI) and / or the uplink (e.g., based on the second unified TCI).

[0092] The WTRU can (e.g., from the gNB) receive instructions for a second unified TCI to be used together / applied to PDCCH, PDSCH, PUCCH and PUSCH (as well as DL RS and / or UL RS).

[0093] The WTRU can be configured with a second mode for unified TCI (e.g., JointTCI mode). The indicated unified TCI (e.g., third unified TCI) can be applied to both downlink and uplink (e.g., based on third unified TCI).

[0094] The WTRU can determine the applicable TCI state for transmission or reception by identifying a unified TCI state instance applicable to transmission or reception. The WTRU can determine the TCI state corresponding to the unified TCI state instance. Transmission may include (e.g., at least) PUCCH, PUSCH, and SRS. Reception may include (e.g., at least) PDCCH, PDSCH, and CSI-RS. A unified TCI state instance may be referred to as a TCI state group, TCI state procedure, unified TCI pool, a set of TCI states, a time-domain instance / stamp / slot / symbol set, and / or a frequency-domain instance / RB / subband set, etc. A unified TCI state instance may be equivalent to, or identified by, a Control Resource Set (CORESET) pool identifier (e.g., CORESETPoolIndex, TRP indicator, and / or etc.).

[0095] As used herein, the Unified TCI can be used interchangeably with one or more of the Unified TCI State, Unified TCI Instance, TCI, and TCI State (e.g., while remaining consistent in this disclosure).

[0096] This article provides one or more features associated with transmit / receive points (TRPs) and multiple TRPs (MTRPs or M-TRPs).

[0097] As used herein, a TRP can be used interchangeably with one or more of a transmit point (TP), receive point (RP), radio remote headend (RRH), distributed antenna (DA), base station (BS), sector (e.g., a sector of a BS), cell (e.g., the geographic cell area served by a BS), and CSI-RS resource set (e.g., while remaining consistent with this disclosure). As used herein, multiple TRPs can be used interchangeably with one or more of MTRPs, M-TRPs, and multiple TRPs (e.g., while remaining consistent with this disclosure).

[0098] This document provides one or more example configurations of TRP, SRI, and Path Loss (PL) Reference RS.

[0099] A WTRU can be configured with one or more TRPs (or can be configured to receive one or more TRPs) (e.g., the WTRU can transmit to and / or receive from it). A WTRU can be configured with one or more TRPs for one or more cells. A cell can be a serving cell, a secondary cell, and / or so on.

[0100] A WTRU can be configured with at least one RS (e.g., for channel measurement purposes). This RS can be represented as a Channel Measurement Resource (CMR). A CMR can include (e.g., a CSI-RS, SSB, or other downlink RS transmitted from a TRP to the WTRU). A CMR can be configured with or associated with a TCI state. A WTRU can be configured with CMR groups (e.g., where CMRs transmitted from the same TRP can be configured). Each group can be identified by a CMR group index (e.g., group 1). A WTRU can be configured with one CMR group per TRP. A WTRU can receive (e.g., a link between one CMR group index and another CMR group index, or a link between (e.g., one) RS index from one CMR group and another RS ​​index from another group.

[0101] WTRU can be configured with one or more PL reference groups (e.g., sets) and / or one or more SRS groups, SRS resource indicators (SRIs) or SRS resource sets (or receive their configurations).

[0102] A PL reference group may correspond to or be associated with a TRP. A PL reference group may include, identify, correspond to, or be associated with one or more TCI states, SRIs, reference signal sets (e.g., CSI-RS sets, SRI sets), CORESET indices, and / or reference signals (e.g., CSI-RS, SSBs).

[0103] The WTRU can receive configurations (e.g., any configuration described herein). These configurations can be sent (e.g., received from) by the gNB or TRP. For example, the WTRU can receive configurations for one or more TRPs, one or more PL reference groups, and / or one or more SRI sets. The WTRU can (e.g., implicitly) determine the association between RS sets / groups and TRPs. For example, if the WTRU is configured with two SRS resource sets, the WTRU can determine to transmit to TRP1 using the SRS in the first resource set and to transmit to TRP2 using the SRS in the second resource set. This configuration can be sent via RRC signaling.

[0104] In the examples and embodiments described herein, TRP, PL reference group, SRI group, and SRI set are used interchangeably. The terms set and group are used interchangeably herein.

[0105] This article provides one or more features associated with CSI components.

[0106] The WTRU can report a subset of CSI components. CSI components may correspond at least to a CSI-RS resource indicator (CRI) (e.g., indicating a CSI-RS resource within a set of CSI-RS resources), an SSB resource indicator (SSBRI) (e.g., indicating an SSB within a set of SSBs), an indication of a panel received at the WTRU (e.g., a panel identifier or group identifier), measurements obtained from an SSB or CSI-RS (e.g., cri-RSRP, cri-SINR, ssb-Index-RSRP, ssb-Index-SINR) (e.g., L1-RSRP, L1-SINR), and / or other channel state information (e.g., at least such as a rank indicator (RI), channel quality indicator (CQI), precoding matrix indicator (PMI), layer index (LI), and / or so on).

[0107] This article provides one or more characteristics associated with the nature of authorization or assignment.

[0108] The nature of an authorization or assignment may include one or more of the following: frequency allocation; an aspect of time allocation, such as duration; priority; modulation and coding scheme; transport block size; number of spatial layers; number of transport blocks; TCI status, CRI, or SRI; number of repetitions; whether the repetition scheme is type A or type B; whether the authorization is configured authorization type 1, configured authorization type 2, or dynamic authorization; whether the assignment is dynamic assignment or semi-persistent scheduling (configuration) assignment; configuration authorization index or semi-persistent assignment index; configuration authorization or assignment period; Channel Access Priority Class (CAPC); any parameters in the DCI provided by MAC or RRC for scheduling authorization or assignment; and / or etc.

[0109] The indication of DCI may include one or more of the following: explicit indication via the DCI field or via the RNTI used to mask the CRC of the PDCCH; implicit indication via properties (e.g., such as DCI format, DCI size, CORESET or search space, aggregation level, the first resource element of the received DCI (e.g., the index of the first control channel element), and / or so on). The mapping between properties and values ​​may be notified by RRC or MAC using signals.

[0110] As used herein, the signal may be used interchangeably with one or more of the following: sounding reference signal (SRS); channel state information (e.g., CSI reference signal (CSI-RS)); demodulation reference signal (DM-RS); phase tracking reference signal (PT-RS); synchronization signal block (SSB); and / or the like.

[0111] As used herein, the channel can be used interchangeably with one or more of the following: Physical Downlink Control Channel (PDCCH); Physical Downlink Shared Channel (PDSCH); Physical Uplink Control Channel (PUCCH); Physical Uplink Shared Channel (PUSCH); Physical Random Access Channel (PRACH); etc.

[0112] As used herein, downlink reception can be used interchangeably with receive (Rx or RX) timing, PDCCH, PDSCH, SSB reception, etc. As used herein, uplink transmission can be used interchangeably with transmit (Tx or TX) timing, PUCCH, PUSCH, PRACH, SRS transmission, etc. As used herein, RS can be used interchangeably with one or more of RS resources, RS resource sets, RS ports, and RS port groups, etc. As used herein, RS can be used interchangeably with one or more of SSB, CSI-RS, SRS, and DM-RS, etc. As used herein, time instances can be used interchangeably with time slots, symbols, subframes, etc.

[0113] This article provides one or more features associated with WTRU auxiliary dynamic codebook constraints.

[0114] The features described in this paper (one or more) can be used to reduce the complexity of PMI search and CSI feedback overhead in large antenna array systems configured with large beam grids (GoB).

[0115] A subset of the codebook can be dynamically determined (e.g., based on previously reported PMIs). The WTRU can report the PMI of the first instance (e.g., from which to determine a subset of the codebook for subsequent reporting). The WTRU can search for and report PMIs from a constrained subset of the codebook, which dynamically changes based on previous PMIs. The size of the constraint can be based on (e.g., pre-configured) thresholds (e.g., such as...). Figure 2A (As shown in the illustration).

[0116] The WTRU can receive CSI reports. This configuration may include definitions of the GoB and the search space (e.g., it may be a GoB or a portion of the GoB). At the first moment, the WTRU can send a first CSI report (e.g., associated with the search space and GoB) with a first beam indicated by a precoded matrix indicator. For example, the WTRU can utilize the i-th beam indicated in the PMI at time... Reporting to CSI (e.g., by (Instructions). The first search space can be the entire GoB. WTRU can be included in the CSI report at the time. The instruction applies dynamic codebook constraints.

[0117] At the second time, WTRU can determine the second search space based on the first beam and at least one threshold. For example, at time... The WTRU can determine the second search space and / or the search space size (e.g., it is part of the GoB). For example, the WTRU can be based on a previous CSI report (e.g., based on the beam indicated in the PMI of the previous CSI report) and a configured threshold (e.g., and To determine the second search space and / or the search space size.

[0118] The second search space may be smaller than the first search space and centered on the first beam. One or more thresholds may indicate at least one of the first and second distances. The WTRU may determine the second search space based on the first beam and at least one threshold by including beams that are vertically located within a first distance from the first beam and horizontally located within a second distance from the first beam. One or more thresholds may include a set of search space dimensions. The WTRU may determine this set of search space dimensions based on one or more parameters and send an indication of this set of search space dimensions to network entities. For example, the second search space may be determined to include beams from the codebook... Position vertical + / - The beam of the beam. The second search space can be determined by including positions in the codebook. Level + / - The beam of a beam. In some examples, It can be equal to (For example, For example, such as Figure 2A As shown.

[0119] The WTRU can select a second beam from a second search space. The WTRU can search for a beam within the search space (e.g., the optimal beam or a beam that meets a criterion). The WTRU can determine the beam relative to the + / - and + / - The beam index of the defined second search space (e.g., where the beam index is determined by...) (Instructions). The WTRU can report the selected beam (e.g., to the gNB). For example, the WTRU can send an indication of a second beam to a network entity. The WTRU can indicate the beam index. and / or previous beam index (e.g., ), and / or the second search space indexed by the beam centered thereon.

[0120] In the third time, WTRU can determine a third search space based on the second beam and at least one threshold. The third search space can be smaller than the first search space and centered on the second beam. For example, in time... WTRU can be used for One or more of the actions are repeated within the centered search area. The WTRU can select a third beam from the third search space and send instructions for the third beam to the network entity.

[0121] For multiple TTIs, WTRU can keep the center in superior. and This can be configured for each TRP. For example, the WTRU can determine a third search space based on the second beam and at least one threshold. The third search space can be smaller than the first search space and centered on the first beam. For example, in time... WTRU can be used for One or more of the actions are repeated within the centered search area. The WTRU can select a third beam from the third search space and send instructions for the third beam to the network entity.

[0122] WTRU can be configured Reset after TTI or via WTRU / gNB indication (e.g., at time...) ).

[0123] Figure 2A and 2B The illustration shows an example of WTRU searching for and reporting PMIs from a constrained subset of codebooks.

[0124] In the example (e.g., in New Radio (NR)), the gNB can determine the precoder (e.g., the optimal precoder) based on CSI feedback from the codebook indexes. The WTRU can receive the codebook configuration. The codebook can be defined as a set of indexes (PMIs). PMIs can be mapped (e.g., each can be mapped) to codewords from the codeword set (e.g., spatial filters or beams). Codewords (e.g., each codeword) can be applied as an antenna across the gNB to generate a beam. To derive the PMIs (e.g., the optimal PMIs), the WTRU can perform a search on the indices from the codebook (e.g., all indices). The WTRU can provide feedback on the indices (e.g., the optimal index) based on the WTRU determination. The search space (e.g., the set of indices searched from the codebook) can be preconfigured. The WTRU can receive the codebook search space via RRC.

[0125] The WTRU can dynamically determine the codebook search space from a subset of the codebook search space configured by the RRC. The WTRU can make an initial determination of the PMI based on the first codebook search space. The WTRU can iteratively update the search space for the following (one or more) reporting periods. The WTRU can report the PMI within the dynamically changing search space.

[0126] WTRU can be configured (e.g., via RRC, MAC-CE, or DCI) to receive data with a first dimension. One antenna port and the second dimension The configuration of the RS at each antenna port (e.g., CSI-RS resource configuration) determines and reports the PMI (e.g., wideband PMI or subband PMI). The WTRU can estimate the channel based on measurements of the RS. Channel estimation can be used to determine the PMI. The WTRU can be configured (e.g., via RRC, MAC-CE, or DCI) with a codebook for the beams and integer values ​​(e.g., oversampling values ​​O1 and O2) to oversample / increase the number of beams (e.g., make the number of beams from...). Oversampling / Increase to This could result in a larger number of beams (e.g., the number of beams is...). The beam grid (GoB) represents the codebook from which the WTRU searches for the PMI.

[0127] The parameters used for dynamic search space updates can be determined by the gNB. The WTRU can perform at least one of the following actions. In time... (For example, where) This could be an indication of when the WTRU first reports the PMI, for example, the first PMI reported by the WTRU after waking from idle mode, or the first PMI in the configuration sequence of PMIs within this reporting method. The WTRU can search the entire search space (e.g., in GoB with...). The search space of the beam is determined and one or more beams (e.g., the search space of the beam) are identified. i Each beam is represented as ,in WTRU can report it in the CSI report.

[0128] Used in The bit width of the indicator that indicates the identified beam(s) and / or PMI (e.g., The number of beams (one or more) identified can be a function of at least one of the following: the total number of beams(s); and / or the number of beams in the search space (e.g., the number of beams is...). For example, in WTRU can use The number of bits is used to report the quantity. L The determined beam (e.g., ,in As another example, in WTRU can use Use one bit to report the quantity L The determined beam.

[0129] exist WTRU can determine a second search space (e.g., a subset of GoB). The second search space can be determined based on at least one of the following: based on previous CSI reports (e.g., based on time...). The beam indicated in the PMI, for example ); based on Pre-configured Values ​​(e.g., , , and / or (These are described in this paper and the regions of the search space are defined); and / or based on more than one beam and in time according to PMI. The reported beam index with the strongest coefficient level and / or amplitude level (e.g., ,in And among them It is the index of the beam with the strongest coefficient level.

[0130] For PMI determination using (e.g., a single) beam, it can be based on... The reported beam (e.g., Beam index and value , , , To determine as follows For the second search space of the second PMI report: , Based on this, WTRU can constrain its search space to beams that are indexed relative to previous beam reports.

[0131] For PMI determination using more than one beam, it can be based on... The index of the beam with the strongest coefficient level (e.g., ) and in of Values ​​(e.g., , , ,and To determine as follows: Second search space: .

[0132] exist The WTRU can determine one or more beams and / or PMIs (e.g., PMIs with more than one beam) based on a second search space. Among them, the strongest beam is formed by, for example, the strongest beam is formed by (Representation). WTRU can determine a PMI with one beam (e.g., by...). The PMI is represented by [the PMI].

[0133] WTRU may report the determined PMI in the CSI report. The bit width of the indicator used to indicate the determined beam(s) and / or PMI may be based on at least one of the following: the total number of the determined beam(s); and / or the number of beams in the second search space (e.g., the number of beams in the second search space). ).

[0134] WTRU can report quantities The determined beam (e.g., Quantity used (bits). WTRU can use Use one bit to report the quantity The determined beam.

[0135] exist WTRU can be updated in Reported beam indices (one or more) (e.g., beam index) and / or become and / or ). WTRU can be based on and / or and / or Values ​​(e.g., , , and / or WTRU can be used to reproduce / regenerate the second search space. The second search space is used to determine and report PMI (e.g., ).

[0136] exist WTRU can perform at least one of the following actions. As described herein, WTRU can be based on... The report(s) beam(s) determines in The center beam of the nth search space. For using more than one beam (e.g., According to the PMI report, the center beam of the nth search space can be in The strongest beam reported (e.g., in) The center beam of the nth search space becomes For a PMI report utilizing a single beam, the center beam of the nth search space could be in... The reported beam (e.g., in) The center beam of the nth search space becomes ). WTRU can be based on the center beam (e.g., obtained as described herein) and based on of Values ​​(e.g., , , and / or ) to determine the nth search space. WTRU can determine and report the PMI from the nth search space.

[0137] WTRU can (e.g., dynamically) change the bit width of the indicator to be based on One or more of the values ​​are used to indicate in The PMI.

[0138] This paper provides one or more features associated with determining the nth search space.

[0139] exist WTRU can be based on one or more of Values ​​(e.g., , , and / or ) and in The index of one or more beams reported in the PMI (e.g., To determine the nth search space. If the defined / configured The value makes the resulting nth search space violate the rule that has The boundaries of the GoB beam (e.g., If so, WTRU can perform at least one of the following: WTRU can adjust (one or more). Values ​​that do not violate GoB boundaries (e.g., WTRU adjustment). Make WTRU can report adjusted data with higher priority in CSI reports (e.g., in Part 1 of the CSI report). Value. WTRU can request gNB reconfiguration by sending a flag. Value. WTRU can request a change to the PMI reporting procedure by sending an instruction to the gNB. At least one of the following may apply: requesting the gNB to report all times based on... Use a GoB with one beam to configure PMI reporting; request the gNB in Based on having Use GoB with one beam to configure PMI reporting, and from Begin configuring PMI reports based on a second search space (e.g., as discussed in this paper).

[0140] This article provides one or more features associated with reporting more than one beam.

[0141] WTRU can be configured (e.g., via RRC, MAC-CS, and / or DCI) to report more than one beam (e.g., report for sub-band beam selection). K One beam; reports are used for one or more layers. M (One beam; and / or etc.).

[0142] This document provides one or more features associated with subband beam selection. The WTRU can report more than one beam used for subband beam selection. K Each beam is used for a sub-band (e.g., per sub-band). WTRU can report the number of beams. K One of the beams. In WTRU can be derived from having Identify (and report) each beam in GoB. K One beam. In WTRU can be obtained from K Identify (and report) one or more beams from a defined beam for one or more sub-bands.

[0143] exist The center beam of the second search space can be selected based on at least one of the following: Reported beams for sub-bands with a given index (e.g., the sub-band with the lowest index); in Reporting for the beam with the highest CQI in the sub-band; and / or so on.

[0144] This document provides one or more features associated with multiple beams across multiple layers. The WTRU can be configured (e.g., via RRC, MAC-CE, and / or DCI) to report more than one beam for more than one layer. The WTRU can identify and report one or more beams for one or more layers. The selected set of beams can be orthogonal to each other. This can be based on... The GoB of each beam determines the selected beam. The WTRU can determine the center beam of the second search space based on at least one of the following: The beam reported for the layer with a given index (e.g., the layer with the lowest index); in Beams reported for layers with specific service types and / or MCS (e.g., layers with URLLC services and / or the highest MCS); and / or so on.

[0145] exist The WTRU can determine a first beam within the nth search space and a second beam outside the nth search space. The first beam can be orthogonal to the second beam. One or more beams can be coupled with... The first beam reported is orthogonal. WTRU can use indicators to indicate that in One or more of the orthogonal beams.

[0146] exist WTRU can divide GoB into more than one second search space. For example, WTRU can (e.g., at a third time) determine a third search space and a fourth search space. The third search space can be smaller than the first search space and can be centered on a second beam. The fourth search space can be smaller than the first search space and can be centered on a third beam. The center beam of one or more nth search spaces can be based on... The report uses one or more beams to determine the nth search space. One or more nth search spaces can use the same or different beams for one or more of the nth search spaces. value.

[0147] WTRU can be based on a second search space (e.g., according to...). Value and The minimum WTRU processing time is determined by the value. In this case, with and The search space may increase with the increase in the number of CSI-RS symbols. The minimum WTRU processing time for measuring CSI-RS symbols may increase. The time required to report a subset of CSI-RS measurements to the gNB may increase. The WTRU can report the PMI of the first instance and determine the codebook subset for continuous reporting from that PMI.

[0148] The value can be used by WTRU to determine a subset of the search space based on the search space and the PMI reported by instances at previous times. This can be targeted at GoB directions (e.g., each of the four directions) (e.g., ...). , , and / or Define / Confirm / Configure value. Values ​​can be defined according to each dimension of GoB (e.g., and It can be defined / defined / configured (e.g., individually). Values ​​(e.g., ). Values ​​can be defined as fixed values ​​(e.g., always using the same value). The value can be configured by gNB (e.g., via RRC, MAC-CE, and / or DCI) for one or more instances of the PMI report.

[0149] This article describes the parameters of a subset of the search space determined by an example WTRU. WTRU can be determined and reported by PMI in one or more instances. Values ​​(e.g., WTRU in determining) PMI determined , , and / or WTRUs can be configured to report CSI in two parts (e.g., part 1 and part 2) transmitted in different time slots. WTRUs can report CSIs defined in the PMI search space with higher priority. Values ​​(e.g., in section 1 of the CSI report). WTRU can report PMI based on the PMI search space (e.g., in section 2 of the CSI report). WTRU can dynamically change the values ​​used for reporting. The bit width of the PMI indicator (e.g., based on the determined...) value).

[0150] The parameters of a subset of the search space can be implicitly determined. (One or more) Values ​​(e.g., and The WTRU may determine the CSI based on at least one of the following: WTRU processing capacity (e.g., the WTRU's ability to determine the CSI). Values, for example, determined based on the number of CPUs used to determine CSI. Value); CSI reference slot; MCS / layer number; service type; codebook type; number of antenna ports; mobility (e.g., Doppler); license type (e.g., configured or dynamic); number of TRPs for CJT; maximum rank per TRP; and / or etc.

[0151] The WTRU can receive the association between TCI states and codebook subsets. This association can be configured by linking (e.g., one) TCI state to a subset from the GoB. Each subset can correspond to a beam set. In the first example, each TCI state can be mapped to (e.g., one) subset. In the second example, each TCI state can be configured with multiple QCL type D source RSs. In this case, each source RS can be associated with a different subset. The WTRU can determine which subset to use (e.g., based on which source RS is activated in the TCI state).

[0152] The WTRU can receive a configuration of multiple codebook subsets. Each subset (e.g., each subset) can be associated with a threshold. This threshold can be based on signal quality (e.g., RSRP) or WTRU location (e.g., distance in meters from the gNB). The WTRU can select a subset of the codebook search space based on its measured signal quality or location above the threshold.

[0153] If a false detection of CSI occurs, WTRU can be reset (e.g., the procedure described in this article can be reset).

[0154] If the WTRU reports a CSI and the gNB misses its detection, subsequent CSIs may be misinterpreted (e.g., because the PMI is always relative to the search space from previously reported ones). The search space in the constrained codebook may be centered on an inaccurate beam. To overcome this problem, the WTRU can report to the gNB an index mapped to the search space ID of a selected codebook subset. The subset ID can be transmitted at a pre-configured period. The WTRU can include the subset ID in every nth CSI report. The WTRU can define a priority rule for discarding beam indices instead of codebook subset IDs. If (e.g., only if) there have been changes in the subset, the WTRU can report the sub-beam index.

[0155] The gNB can instruct the WTRU to reset the search space or use the same search space as previously reported (e.g., if the gNB detects that the number of NACKs in the HARQ is higher than a threshold, or if an error is detected in the CSI report). The WTRU can receive a MAC-CE configured with a mapping of activation commands to subsets of the codebook search space. The WTRU can modify the codebook search space subset parameters based on the MAC-CE activation / deactivation commands.

[0156] The WTRU can be configured with a timer. When the timer expires, the WTRU can reset the search space. Upon timer expiration, the WTRU can repeat the actions described herein for dynamic codebook constraints (e.g., starting from the beginning of the search space initially configured by RRC).

[0157] WTRU can determine in-phase with the CSI resources of a partition. WTRU can determine in-phase information for large antenna array systems configured with a large number of CSI ports.

[0158] If CSI-RS resources (e.g., all CSI-RS resources) cannot be mapped within the same time slot, the WTRU can partition the CSI-RS resources among subsets. The WTRU can use these partitions to determine in-phase information.

[0159] The WTRU can receive information indicating a first CSI-RS resource set associated with a first set of Channel State Information Reference Signal (CSI-RS) ports and a second CSI-RS resource set associated with a second set of CSI-RS ports. The first CSI-RS port set may include a first plurality of ports mapped to the first CSI-RS resource set. The second CSI-RS port set may include a second plurality of ports mapped to the second CSI-RS resource set. The WTRU can receive a first CSI-RS resource configuration (e.g., a mapping of M CSI-RS ports to N subsets). The mapping may overlap between adjacent subsets (e.g., some ports from subset n and subset n+1 are the same). The mapping may be based on non-overlapping subsets (e.g., N=2 polarizations). In this case, the WTRU can receive a second CSI-RS resource configuration (e.g., where each port is associated with a first or second subset (e.g., polarization) of CSI-RS resources from the first CSI resource configuration).

[0160] The WTRU can receive CSI-RS on CSI-RS resources in a first CSI-RS resource set and / or a second CSI-RS resource set (e.g., transmitted on up to N port subsets in up to N different time slots). The sequence of transmitted subsets can be based on a configured time-based pattern (e.g., when CSI-RS is transmitted in CSI-RS resources in the first and / or second CSI-RS resource sets, the pattern identifies which port subset(s) are used in which symbols and / or time slots).

[0161] The WTRU can determine (e.g., or take) a measurement based on the received CSI-RS. The WTRU can determine a first measurement based on CSI-RS received on a first CSI-RS resource set, and determine a second measurement based on CSI-RS received on a second CSI-RS resource set.

[0162] The WTRU can determine the PMI of N subsets (e.g., each of the N subsets) based on the measurement. For example, the WTRU can determine a first PMI associated with a first CSI-RS resource set based on a first measurement, and a second PMI associated with a second CSI-RS resource set based on a second measurement.

[0163] If overlapping subsets of resources are considered or used (e.g., at least one CSI-RS resource from the first CSI-RS resource set is in the second CSI-RS resource set), the WTRU can measure in-phase between ports associated with adjacent subsets. In this case, the CSI report can indicate the quantized in-phase measurement between the first and second CSI-RS resource sets. If non-overlapping subsets of resources are considered or used (e.g., the first and second CSI-RS resource sets are disjoint sets), the WTRU can measure in-phase across ports in different subsets associated with the second CSI-RS resource configuration. In this case, the CSI report can indicate the in-phase measured across the first and second CSI-RS port sets.

[0164] The WTRU can (e.g., to network entities) send CSI reports indicating the first PMI and the second PMI. For example, the WTRU can report one or more of the following (e.g., in a single CSI report): N determined precoders; N-1 quantized in-phase measurements between adjacent subsets (e.g., if overlapping subset resources are considered or used); and / or by… Indicates the in-phase of port measurements across different subsets associated with the port (e.g., whether non-overlapping subset resources were considered or used).

[0165] Resources may or may not overlap. In the case of overlapping resources, the gNB can partition the configured CSI ports (e.g., 64 ports) into multiple subsets, where each subset supports a smaller number of CSI ports (e.g., 32 ports), as per [reference to...]. Figure 3 The WTRU can be configured with multiple subsets. One or more CSI ports can be mapped to more than one subset (e.g., there is overlap between subsets). For example, for a CSI with 64 ports, four subsets can be considered: Subset 1: ports 1-32; Subset 2: ports 17-48; Subset 3: ports 33-56; and Subset 4: ports 49-64. In this case, 16 ports are shared between every two subsets.

[0166] CSI-RS ports can be partitioned into N subsets (for example, there is a common port between every two adjacent subsets).

[0167] The WTRU can receive subsets of the CSI-RS. The WTRU can determine the in-phase matrix between two adjacent subsets (e.g., every two adjacent subsets). In this case, N-1 in-phase matrices can be determined.

[0168] The WTRU can report the PMI for a subset (e.g., each subset). The WTRU can report the in-phase matrix (e.g., determined for auxiliary channel estimation and precoding) to the gNB.

[0169] For measurement events on 64 ports (e.g., per measurement event), overlapping ports can vary. For example, port assignment can be rotated based on a pre-configured or pseudo-random pattern. Port rotation can be based on system operating parameters or information (e.g., timeslot number, bandwidth portion ID, etc.).

[0170] CSI-RS resource partitioning can be based on polarization. The WTRU can determine a first CSI-RS resource set based on a first polarization of CSI-RS ports in a first CSI-RS port set. The WTRU can determine a second CSI-RS resource set based on a second polarization (e.g., different from the first polarization) of CSI-RS ports in a second CSI-RS port set. One or more CSI-RS resources can be aggregated, combined, and / or used for measurements on a larger number of antenna ports. For example, the WTRU can aggregate a second CSI-RS resource set and a third CSI-RS resource set to generate a combined CSI-RS resource set. The WTRU can determine a second measurement based on CSI-RS received on the combined CSI-RS resource set.

[0171] In one example, the N1 antenna port CSI-RS resources and the N2 antenna port CSI-RS resources can be aggregated, combined, and / or used for M.T Measurement of the MIMO channel at the antenna port (e.g., where...) or In another example, two N1 antenna port CSI-RS resources and one N2 antenna port CSI-RS resource can be aggregated, combined, and / or used for M. T Measurement of the MIMO channel at the antenna port (e.g., ).

[0172] As used in this article, M is based on the aggregation of one or more smaller antenna port CSI-RS resources. T The CSI-RS resources at the antenna port can be referred to as composite CSI-RS resources, aggregated CSI-RS resources, cascaded CSI-RS resources, or combined CSI-RS resources. One or more CSI-RS resources aggregated, combined, or cascaded for a composite CSI-RS resource can be referred to as component CSI-RS resources.

[0173] Component CSI-RS resources can be multiplexed on time and / or frequency resources. If component CSI-RS resources are multiplexed on frequency resources, they can be located in different subsets of RBs within a time slot. If component CSI-RS resources are multiplexed on time resources, they can be located within a certain time window (e.g., T). W Within ), the time window can be determined based on at least one of WTRU speed, Doppler frequency, channel coherence time, and / or time-domain channel properties (TDCP).

[0174] Component CSI-RS resources can be associated with antenna polarization.

[0175] One or more component CSI-RS resources of a composite CSI-RS resource can be associated with a specific polarization of an antenna port. For example, if the gNB uses polarized antennas (e.g., v-pol and h-pol), a first component CSI-RS resource can be associated with a first polarization (e.g., v-pol), and a second component CSI-RS resource can be associated with a second polarization (e.g., h-pol). One or more of the following may apply. Component CSI-RS resources can be used to configure associated polarization information. For example, component CSI-RS resource configuration may include an NZP-CSI-RS resource identifier, the number of antenna ports, and their associated polarization (e.g., v-pol or h-pol). The associated polarization of a component CSI-RS resource can be determined based on the NZP-CSI-RS resource identifier. If component CSI-RS resources are multiplexed in the time domain (e.g., in different time resources that include time slots, subframes, and / or symbols), additional component CSI-RS resources representing polarized antenna ports (e.g., two-port CSI-RS, where the first antenna port is associated with v-pol and the second antenna port is associated with h-pol) can be used (e.g., to enable the WTRU to estimate in-phase information across polarized antenna ports).

[0176] One or more (e.g., two) component CSI-RS resources of a composite CSI-RS resource can be used. The first component CSI-RS resource can be associated with an antenna port having the same polarization (e.g., both v-pol and h-pol), and the second component CSI-RS resource can be associated with an antenna port of polarization (e.g., two-port CSI-RS resources, where the first port is associated with v-pol and the second port with h-pol). If M T yes N Then the first component of CSI-RS resources can be The second component CSI-RS resource can be a 2-port CSI-RS resource.

[0177] This article provides one or more features associated with component CSI-RS resource associations across different time slots (e.g., including sampled CSI-RS transmissions).

[0178] One or more component CSI-RS resources of a composite CSI-RS resource may be associated in a time-domain transmission mode. The WTRU may be configured with or indicate a time-domain transmission mode via RRC, MAC-CE, and / or DCI. One or more component CSI-RS resources may include a first component CSI-RS resource and a second component CSI-RS resource (and may include a third or more component CSI-RS resources). One or more of the following may be applicable. The time-domain transmission mode may include one or more parameters based on at least one of period, time-domain offset(s), time slot index(s), and / or symbol index(s).

[0179] The WTRU can determine (e.g., based on a time-based recursive pattern) on which CSI-RS resource sets (e.g., the first and second CSI-RS resource sets) to receive CSI-RS. Based on the period and / or (one or more) time-domain offsets, the WTRU can determine on which time slot / symbol to transmit the first component CSI-RS resource and / or on which time slot / symbol to transmit the second component CSI-RS resource. The first and second component CSI-RS resources can be transmitted periodically. The transmission of the second component CSI-RS resource may be time-shifted by a time-domain offset compared to the transmission of the first component CSI-RS resource.

[0180] Based on one or more slot indices and / or one or more symbol indices, the WTRU can determine on which slot / symbol the first component CSI-RS resource is transmitted (e.g., in an irregular pattern in time via one or more slot / symbol indices), and / or on which slot / symbol the second component CSI-RS resource is transmitted (e.g., in an irregular pattern in time via one or more slot / symbol indices).

[0181] The WTRU can perform one or more measurements and reports. The WTRU can receive the number of antenna ports (e.g., M) indicating the composite CSI-RS resources used for the measurement. T The WTRU can receive configuration information indicating the number of antenna ports (e.g., N1) for the first component CSI-RS resource. The WTRU can also receive configuration information indicating the number of antenna ports (e.g., N2) for the second component CSI-RS resource. T It can be equal to (or less than) If M T Less than Then the WTRU can receive additional configuration or instructions on the Nc (e.g., Using this additional configuration or instruction, the WTRU is configured to perform inter-CSI measurements (e.g., derive one or more in-phase coefficients) based on both the first and second component CSI-RS resources. Nc antenna ports can be included in a third component CSI-RS resource (e.g., for the purpose of inter-CSI measurements), which can be configured for the WTRU.

[0182] The WTRU can receive one or more interference measurement resources (e.g., one or more CSI-IM resources) for interference measurement. Based on the configured M T (For example, at time T1), WTRU can determine at M T Ports (e.g., M) T The first channel measurement is performed on (=64). The WTRU can determine (and report) one or more PMIs (e.g., via PMI reporting) based on the first channel measurement. One or more PMIs can represent M T -by-r(M T Multiply by r (precoding) matrix. r can be the rank reported by the WTRU via RI. The WTRU can determine (and report) CQI and / or L1-SINR based on first channel measurements and first interference measurements (e.g., based on (one or more) CSI-IM resources).

[0183] WTRU can sample CSI-RS transmissions. It measures M within a given measurement time (e.g., at time T2). T When a subset of antenna ports (e.g., N1 or N2) is selected (e.g., afterward), the WTRU can receive notification from the WTRU via M. T Each antenna port is used to instruct or configure the second channel measurement.

[0184] At time T2, the WTRU can measure the first component CSI-RS resource based on the time-domain transmission pattern (e.g., using N1 ports) (e.g., where, based on the time-domain transmission pattern, the second component CSI-RS resource is not transmitted in T2). In response to such a partial channel measurement (e.g., based on sampled CSI-RS transmissions, where only N1 ports are transmitted via the first component CSI-RS resource), the WTRU can determine M. T Ports (e.g., M) T =64) is the second channel measurement. For example, the WTRU can be measured via M (e.g., previously or recently). TThe second channel measurement is determined by interpolation and / or extrapolation of N1 ports on which (e.g., the first channel measurement) is applied (e.g., a new) measurement. The WTRU may determine (and report) one or more PMIs (e.g., via a representation of M) based on the second channel measurement (e.g., based on one or more configured or indicated CSI-IM resources), RI and / or CQI (and / or L1-SINR) based on the second interference measurement (e.g., based on one or more configured or indicated CSI-IM resources), RI and / or CQI (and / or L1-SINR). T PMI report of -by-r (precoded) matrix.

[0185] At time T3, the WTRU can measure the second component CSI-RS resource (with N2 ports) based on the time-domain transmission pattern (e.g., where the first component CSI-RS resource is not transmitted in T3 based on the time-domain transmission pattern). In response to such a partial channel measurement (e.g., based on sampled CSI-RS transmissions where only N2 ports are transmitted via the second component CSI-RS resource), the WTRU can determine M. T A third channel measurement on a port (e.g., MT=64). For example, the WTRU can be measured via M (e.g., previously or recently). T The third channel measurement is determined by interpolation and / or extrapolation of N2 ports on which (e.g., the first channel measurement or the second channel measurement) is applied (e.g., a new) measurement. The WTRU may determine (and report) one or more PMIs (e.g., via a representation of M) based on the third channel measurement (e.g., based on configured or indicated CSI-IM resources), RI and / or CQI (and / or L1-SINR) based on the third interference measurement (e.g., based on configured or indicated CSI-IM resources), RI and / or CQI (and / or L1-SINR). T PMI report of -by-r (precoded) matrix.

[0186] Sampling CSI-RS transmissions (e.g., partial channel measurements) can reduce CSI-RS transmission overhead (e.g., because the gNB can, for example, transmit only a subset of CSI-RS ports within a given time period based on a time-domain transmission pattern, which saves CSI-RS transmission resource overhead). If, within a given time period, the WTRU measures (e.g., only measures) a subset of ports (e.g., N1 or N2 ports), then the WTRU can base its measurements on (e.g., previous or most recent) M... T Interpolation and / or extrapolation of a subset of ports (e.g., new) are applied to measure the entire dimension of the channel (e.g., in M). T On each port). This can improve CSI reporting performance (e.g., accuracy) by reporting the corresponding channel quality metric (e.g., CQI and / or L1-SINR), for example, the corresponding channel quality metric is based on the assumption of the entire dimension of the channel (e.g., in M). TIt is derived from (on N1 or N2 ports) rather than based on a partial dimension of the assumed channel (e.g., on N1 or N2 ports, although this is actually measured in a given time).

[0187] One or more component CSI-RS resources can be associated with one or more component precoding matrices.

[0188] A precoder can be constructed with one or more component precoders. For example, a precoder ( W ) can be constructed as (For example, where) W It can be called a precoder, composite precoder, codebook, or composite codebook, and It can be referred to as a component precoder or component codebook. WTRU can report preferred precoder information (e.g., PMI) along with other CSI information (e.g., CQI, RI, L1-RSRP) based on measurements of composite CSI-RS resources.

[0189] The WTRU can report precoder information as a set of component precoder information. For example, the WTRU can report preferred component precoder information. gNB can combine the reported information to construct a precoder. W Component precoder information can be reported together or at different times. If the WTRU reports component precoder information, the priority levels of the component precoders (e.g., each component precoder) may differ. Based on the priority level of each component precoder, the WTRU may discard lower-priority component precoder information (e.g., if uplink resources for CSI reporting are limited or uplink resource conflicts occur).

[0190] One or more component CSI-RS resources can be associated with one or more component precoders used for CSI reporting. For example, three component CSI-RS resources can be used for M T One port CSI-RS resource. M T Each port of CSI-RS resource can be used to utilize codebooks. The CSI report. In this case, the first component of the CSI-RS resource can be used to determine... The second component of CSI-RS resources can be used to determine Furthermore, the third component of CSI-RS resources can be used to determine... ; and so on. In another example, two component CSI-RS resources can be used to exploit the codebook. The CSI report. In this case, the first component of the CSI-RS resource can be used to determine... Furthermore, the second component of CSI-RS resources can be used to determine... .

[0191] WTRU can report subsets of component precoders / codebooks based on the availability of measurement resources. For example, if a subset of component CSI-RS resources (e.g., only a subset) is available within a time window used for CSI reporting, WTRU can report one or more component precoders / codebooks associated with the available component CSI-RS resources (e.g., within that time window). The remaining component precoders / codebooks can be assumed based on the most recent report. One or more component CSI-RS resources can be associated with a single component precoder / codebook. One or more component precoders / codebooks can be associated with (e.g., a single) component CSI-RS resource.

[0192] In the case of non-overlapping resources (e.g., using the same CSI resource mapped to both polarizations), subsets (e.g., each subset) can be associated with the first polarization and the second polarization. For example, in the case of a CSI with 64 ports, using the same CSI-RS resource, a first subset and a second subset of 32 ports can be mapped to the first polarization and the second polarization.

[0193] gNB can partition the configured CSI ports (e.g., 64 ports) into multiple subsets, thereby supporting a smaller number of CSI ports (e.g., 32 ports). Figure 4 As shown, subsets (e.g., each subset) can be associated with different polarizations (e.g., associated with a first polarization and a second polarization).

[0194] Using the same CSI resources, subsets (e.g., each subset) can be associated with a first polarization and a second polarization. For example, in the case of a 64-port CSI, using the same CSI-RS resources, a first subset and a second subset of 32 ports can be mapped onto the first polarization and the second polarization. The WTRU can receive the first subset and the second subset. The WTRU can determine the precoding matrices for the first subset and the second subset (e.g., respectively). and ).

[0195] These two subsets may have cross-polarizations that have not yet been calculated by WTRU (e.g., due to the fact that...). (Independent reception of a subset of the indicated data). Dual-port CSI can be transmitted on (e.g., a single) CSI-RS resource using paired polarization (e.g., a pair of polarizations). The WTRU can determine and report the in-phase information of the downlink PMI (e.g., PMI type I and / or type II codebooks). The WTRU can receive dual-port CSI on (e.g., a single) CSI-RS resource. The WTRU can determine the in-phase and report the in-phase to the gNB (e.g., along with...). and ).

[0196] Precoder matrix (e.g., the entire precoder matrix) It can include two block precoders. The first can be applied to the first polarization. The second can be applied to the second polarization.

[0197] in, This refers to the first CSI resource set; This refers to the second CSI resource set; This refers to {the first CSI resource set, the second CSI resource set}. WTRU can be determined. Report to gNB .

[0198] The WTRU can perform partial CSI reporting. The WTRU can receive implicit CSI port indications for partial reporting.

[0199] The number of CSI ports can be increased (e.g., without directly scaling CSI-RS resources and / or procedures). WTRU can associate TCI states with a subset of ports (e.g., per port subset). A subset of ports can be indicated by indicating its associated TCI state(s) (e.g., in triggering DCI, such as...). Figure 5 (As shown in the illustration).

[0200] The WTRU can receive a CSI configuration of CSI-RS resources with N CSI ports (e.g., where M subsets of the N CSI-RS ports are mapped to the same set of CSI-RS Resource Elements (REs) in M ​​different transmission slots). The CSI-RS resource configuration can include links from the CSI-RS ports to CSI-RS REs in the subsets (e.g., each subset). This configuration can include a pattern of time and frequency mapping (e.g., for each subset) of the CSI-RS ports. For example, the received configuration could map N=128 CSI-RS ports across M=4 transmission slots. In this case, 32 ports could be mapped to the same set of CSI-RS REs in each transmission slot.

[0201] WTRU can receive TCI association information that maps ports (e.g., each of N ports) to TCI states (e.g., one of L configured TCI states (QCL)).

[0202] The WTRU can receive configuration information indicating the mapping between TCI states and CSI-RS port sets. The WTRU can determine the CSI-RS port sets based on the TCI state indications and mappings. For example, the received configuration can associate ports (e.g., each of N=128 ports) with one of L=8 TCI states. For instance, ports 1-12 and 13-32 from the first subset (e.g., time slots) can be associated with TCI1 and TCI2 respectively, and ports 65-96 from the third subset (e.g., time slots) can be associated with TCI6.

[0203] The WTRU may receive a DCI (e.g., from a network entity) to trigger aperiodic CSI reporting. The DCI may include an indication for selecting CSI-RS resources, one or more of L TCI states for CSI reporting, Physical Uplink Shared Channel (PUSCH) resources, and / or an indication for performing aperiodic CSI reporting.

[0204] The WTRU can determine the set of CSI-RS ports based on the indication of the TCI status. The WTRU can then determine the transmission slots associated with that set of CSI-RS ports. Based on the determined ports associated with the indicated TCI status, the WTRU can determine the CSI-RS REs used for CSI measurements within each transmission slot (e.g., per transmission slot). For example, the received indication may point to ports associated with TCI1, TCI2, and TCI6, which are mapped to CSI-RS resources in a first subset and a third subset (e.g., slots). The WTRU can use the set of CSI-RS resource elements to send CSI reports to network entities. For example, the WTRU can measure and report CSI for (e.g., only for) the indicated CSI-RS REs.

[0205] The WTRU can determine that the capacity of the CSI-RS resource element set is insufficient to send CSI reports. If the capacity of the indicated PUSCH resource is insufficient to report all CSIs, the WTRU can select a subset of CSIs for reporting (e.g., according to one or more of the following rules). The WTRU can determine the corresponding measured channel quality metric for each of the multiple CSIs. For example, if the channel quality metric measured by the WTRU meets (e.g., is higher than / greater than) a configured threshold (e.g., rank > 4, CQI > 12, etc.), the WTRU can select the CSI associated with the indicated TCI for reporting. If the channel quality metric measured by the WTRU has shown the greatest change within a configured time window, the WTRU can select the CSI associated with the indicated TCI for reporting. If the WTRU's last report is the oldest among the other indicated TCI states that were reported, the WTRU can select the CSI associated with the indicated TCI for reporting. For example, the WTRU can determine the corresponding reporting age for each of the multiple CSIs and select the CSI associated with the oldest reporting age as a subset of the CSIs.

[0206] The WTRU can use the indicated PUSCH resource to report the CSI for the indicated TCI status. If the WTRU selects a CSI to report, the WTRU can include an index of the TCI statuses for which the associated CSI is reported.

[0207] The WTRU can receive CSI configurations to support N CSI ports (e.g., where the N CSI ports are distributed across more than one transmission time slot). The WTRU can also receive CSI configurations for CSI-RS resources with N CSI ports (e.g., where M subsets of the N CSI-RS ports can be mapped to the same or different sets of CSI-RS REs in M ​​different time slots). For example, as... Figure 5 As shown, the WTRU can be configured with 128 CSI-RS ports, of which 32 CSI ports are mapped to a CSI RE set in each time slot.

[0208] Figure 5 The diagram illustrates how a subset of ports is indicated based on their associated TCI status during DCI triggering.

[0209] CSI-RS resource configuration may include links from CSI-RS ports to CSI-RS REs in each subset. This configuration may include, for example, a pattern of time and frequency mapping of CSI-RS ports for each subset. For example, based on a first CSI-RS resource set, a second CSI-RS resource set, and a pattern for assigning ports to the CSI-RS resource sets, the WTRU may determine a third CSI-RS resource set associated with a third set of CSI-RS ports and a fourth CSI-RS resource set associated with a fourth set of CSI-RS ports. The WTRU may determine the PMIs and measurements associated with the third and fourth CSI-RS resource sets. The WTRU may report the measurements and / or PMIs.

[0210] The WTRU can receive TCI association information that maps N ports (e.g., each of the N ports) to a TCI state (e.g., one of L configured TCI states (QCLs)). For example, if the WTRU is configured with N=128 CSI ports, the received configuration can associate each of the N=128 configured ports with a TCI state (e.g., one of L=8 TCI states). For example, ports 1-12 and ports 13-32 from the first subset (time slots) can be associated with TCI1 and TCI2 respectively, and ports 65-96 from the third subset (time slots) can be associated with TCI6.

[0211] The WTRU can receive dynamic indications (e.g., DCIs) to trigger non-periodic CSI reporting. These indications may include information elements indicating the selection of one or more of the CSI-RS resources and L TCI states for CSI reporting. The dynamic indications may specify the PUSCH resource used to transmit the CSI report.

[0212] The WTRU can determine the CSI-RS REs for CSI measurements in a time slot (e.g., per time slot) based on the determined ports associated with the indicated TCI state. For example, the received indication may point to ports associated with TCI1, TCI2, and TCI6, which are mapped to CSI-RS REs for CSI-RS resources in a first subset and a third subset (time slots). The WTRU can measure and report CSI for the indicated CSI-RS RE (e.g., only for that CSI-RS RE).

[0213] WTRU can report (e.g., be required to report) CSI content larger than the allocated PUSCH resource. WTRU can reduce the CSI payload size. For example, if the capacity of the indicated PUSCH resource is not large enough to report all configured CSIs for all CSI ports, WTRU can select which CSIs to report based on one or more of the following rules.

[0214] The WTRU can be configured with one or more thresholds. If the channel quality metric measured by the WTRU meets the configured threshold, the WTRU may choose to report the CSI associated with the indicated TCI. For example, the WTRU may report (e.g., only) the CSI of a subset of resources, i.e., the rank or CQI associated with that subset of resources (e.g., rank > 4, CQI > 12, etc.).

[0215] The WTRU can be configured with a counter or a time window. If the channel quantity measured by the WTRU exhibits the greatest change within the configured time window, the WTRU can choose to report the CSI associated with the indicated TCI. For example, the WTRU can report a subset of the CSIs, i.e., the CSI ports associated with that subset are the "oldest".

[0216] If the WTRU's last report is the oldest among other reported indicated TCI states, the WTRU may choose to report the CSI associated with the indicated TCI. The WTRU may use the indicated PUSCH resource to report the CSI of the indicated TCI state. If the WTRU performs CSI selection, it may include an index of the TCI states that reported its CSI.

[0217] WTRU can receive explicit CSI port indications for partial reporting.

[0218] The WTRU can receive CSI configurations to support N CSI ports (e.g., where the N CSI ports are distributed across more than one transmission time slot). The WTRU can also receive CSI configurations for CSI-RS resources with N CSI ports (e.g., where M subsets of the N CSI-RS ports can be mapped to the same or different sets of CSI-RS REs in M ​​different time slots).

[0219] The WTRU can receive dynamic indications (e.g., DCIs) to explicitly indicate the subset of associated CSI ports to be measured and reported. DCIs can be used to indicate which subset of CSI-RS ports should be utilized by the WTRU at any given time. DCIs can also indicate uplink resources to be used for CSI reporting.

[0220] The additional bits in the DCI can be used to indicate a subset of CSI-RS ports. An extended DCI format can be introduced to accommodate this situation (e.g., where 128 CSI-RS ports are divided into 8 subsets, using three additional bits).

[0221] The gNB can dynamically configure CSI-RS port subsets (e.g., based on channel conditions, interference, network load, etc.). The corresponding index of the CSI-RS port subset can be sent to the WTRU via DCI trigger. The WTRU can provide feedback to the gNB regarding the CSI-RS port subsets (e.g., indicating preferred user-specific CSI-RS port subsets or combinations thereof, ranking the performance of different CSI-RS port subsets and signaling, etc.). Feedback can be based on historical and / or current data measurements.

[0222] By utilizing a subset of CSI-RS ports in the DCI, the system can reduce the associated overhead of transmitting CSI-RS from all ports at any given time.

[0223] The WTRU can be configured by the network to decode the extended DCI format used for CSI-RS port subset indication. This configuration can include parameters related to traditional CSI-RS resource configuration and CSI reporting. The configuration with the extended DCI format can include one or more bit fields (e.g., new bit fields) to indicate which CSI-RS port subset to use.

[0224] The network can divide the total number X of CSI-RS ports into Y subsets (e.g., X = 64, Y = 2) to indicate which set of the 32 CSI-RS port subsets to use. The CSI-RS port subsets can be represented as binary patterns or indices within the extended DCI format.

[0225] The WTRU can receive configurations from the gNB for one or more CSI-RS resource sets (e.g., each CSI-RS resource set includes multiple CSI-RS resources). CSI-RS resource sets can be associated with specific transmission parameters (e.g., period, subcarrier, spacing, and bandwidth). CSI-RS resource sets can also be associated with specific subsets of CSI-RS ports (e.g., enabling the WTRU to associate DCI indications with the appropriate CSI-RS resource set for CSI measurements).

[0226] This configuration can include parameters related to CSI reporting (e.g., reporting cycle, report format, quantization level, and triggering conditions). This configuration can also indicate the uplink resources (e.g., PUCCH or PUSCH) to be used for CSI report transmission.

[0227] WTRU can (e.g., continuously) monitor PDCCH to decode extended DCI formats addressed to its specific RNTI.

[0228] The WTRU can decode the relevant extended DCI format. The WTRU can make the receive capability based on CSI-RS resources corresponding to a subset of the indicated CSI-RS ports. This subset can be an index or binary mode within the corresponding DCI.

[0229] The WTRU can receive CSI-RS resources. The WTRU can measure relevant performance metrics (e.g., RSRP, SINR, interference, anomalies, etc.) on the indicated subset of CSI-RS ports.

[0230] The WTRU can use the measurements to generate a CSI report. This report may include CSI quantities (e.g., CQI, RI, and / or PMI). A subset of CSI-RS port feedback may be provided by the WTRU as part of the CSI report (e.g., to provide metrics related to performance, interference, anomalies, etc.).

[0231] The WTRU may (e.g., in a CSI report) provide CSI-RS port subset performance metrics (e.g., RSRP, SINR, and / or interference). The WTRU may (e.g., in a CSI report) provide CSI-RS port subset utilization efficiency (e.g., providing redundancy indication if some CSI-RS ports within the subset are redundant or overlapping channel information). The WTRU may (e.g., in a CSI report) provide the number (e.g., optimal number) of CSI-RS port subsets used to provide sufficient channel estimation with minimal overhead, or the ordering of CSI-RS port subsets. The WTRU may (e.g., in a CSI report) provide preferred alternative CSI-RS port subset partitions for achieving better channel estimation performance.

[0232] The WTRU can (e.g., in a CSI report) provide adjustments to the power level for a specific subset of CSI-RS ports (e.g., to improve channel estimation performance). The WTRU can (e.g., in a CSI report) provide additional information about the subset of CSI-RS ports (e.g., anomalous patterns, interference source identification, channel hardening values, etc.).

[0233] WTRU can transmit CSI reports to the network via a scheduled uplink channel (e.g., PUCCH or PUSCH). The transmission mode (e.g., periodic or aperiodic) can be determined based on a configuration that includes potential triggering conditions (e.g., a drop in SINR value below a set threshold).

[0234] The network can receive CSI reports. The network can process this feedback (e.g., to optimize subsequent transmissions to the WTRU). Adjustments may include CQI-based MCS adaptation, RI and PMI-based spatial multiplexing / beamforming, and / or modifications to the subset of CSI-RS ports used for future transmissions (e.g., based on feedback from the CSI-RS port subset within the CSI report).

[0235] The WTRU can continue to monitor the PDCCH to obtain updated DCIs. The WTRU can adapt its CSI measurements and reports. For example, the WTRU can receive a second DCI indicating a second TCI state (e.g., from a network entity). The WTRU can determine a second CSI-RS port set based on the indication of the second TCI state. The WTRU can determine a second transport slot associated with the second CSI-RS port set and a second CSI-RS resource element set associated with the second transport slot. The WTRU can use the second CSI-RS resource element set to send CSI reports.

[0236] Figure 6 The illustration depicts an example technology used for reporting CSI. As shown, the gNB can be configured with a WTRU for an extended DCI format used for indicating a subset of CSI-RS ports. The WTRU can monitor the PDCCH. The WTRU can decode the extended DCI format to extract the indicated subset of CSI-RS ports. The WTRU can receive the indicated CSI-RS ports. The WTRU can perform measurements (e.g., RSRP, SINR, and / or interference).

[0237] The WTRU can generate a CSI report that includes feedback from a subset of CSI-RS ports. The WTRU can transmit the CSI report to the gNB (e.g., via PUCCH and / or PUSCH). The gNB can process this feedback to optimize future transmissions. For example, the gNB can modify the CSI-RS port subset partitioning. The WTRU can (e.g., continuously / constantly) monitor the PDCCH to obtain updated DCI and measurements.

[0238] If the WTRU receives a CSI configuration that supports N CSI ports (e.g., where the N CSI ports are distributed across more than one transmission slot), the WTRU can be configured with multi-PUSCH transmission for CSI reporting.

[0239] The WTRU can receive CSI configurations with N CSI ports and CSI-RS resources (e.g., M subsets of the N CSI-RS ports can be mapped to the same or different sets of CSI-RS REs in M ​​different time slots). The WTRU can be configured with M1 multi-PUSCH transports (e.g., where M1 <= M). M1 can represent the number of subsets to be reported.

[0240] A PUSCH configuration can include multiple multi-PUSCH TDRA tables (e.g., pusch-TimeDomainAllocationListForMultiPUSCH). For example, in each multi-PUSCH TDRA table, rows (e.g., a single row) can be configured with one or more SLIVs (e.g., one SLIV per PUSCH) (where the SLIV determines the number of symbols per PUSCH). A multi-PUSCH TDRA table (e.g., multiple PUSCH TDRA tables per configuration) can correspond to one of the M1 cases.

[0241] The WTRU can receive dynamic indications (e.g., DCIs) to report CSIs for M1 subsets out of M subsets, and report the corresponding CSI for each subset via M1 sequentially configured PUSCH resources. The indication may include fields indicating the M1 subsets out of the M subsets. The dynamic indication (e.g., DCI) may carry an indication to select one of the TDRA tables based on the indicated M1 value.

[0242] If the PUSCHconfig includes one (e.g., only one) multi-PUSCH TDRA table where M1>M (e.g., pusch-TimeDomainAllocationListForMultiPUSCH), then the first M PUSCH timing can be used for CSI reporting, while the remainder can be used for UL-SCH.

[0243] This paper describes systems, methods, apparatus, and means for determining and partitioning Channel State Information (CSI) resources in phase.

[0244] An apparatus (e.g., a wireless transmit / receive unit (WTRU)) can receive information indicating a first Channel State Information Reference Signal (CSI-RS) resource set associated with a first CSI-RS port set and a second CSI-RS resource set associated with a second CSI-RS port set. The apparatus can receive CSI-RS on at least one of the first or second CSI-RS resource sets. The apparatus can determine measurements based on the CSI-RS. The apparatus can determine a first Precoding Matrix Indicator (PMI) for the first CSI-RS resource set and a second PMI for the second CSI-RS resource set based on the measurements. The apparatus can send a Channel State Information (CSI) report to a network entity, wherein the CSI report indicates the first and second PMIs.

[0245] One or more of the CSI-RS resources in the first CSI-RS resource set may be in the second CSI-RS resource set. The CSI report may further indicate the quantified in-phase measurement associated with the first and second CSI-RS resource sets.

[0246] None of the CSI-RS resources in the first CSI-RS resource set are in the second CSI-RS resource set. The CSI report can further indicate in-phase measurements across the first and second CSI-RS port sets.

[0247] Although the above features and elements are described in specific combinations, each feature or element may be used alone without other features and elements of the preferred embodiment, or in various combinations with or without other features and elements.

[0248] While the implementations described herein may consider 3GPP-specific protocols, it should be understood that they are not limited to this scenario and are applicable to other wireless systems. For example, although the solutions described herein consider LTE, LTE-A, New Radio (NR), or 5G-specific protocols, it should be understood that they are not limited to this scenario and are applicable to other wireless systems. For example, although the system has been described with reference to 3GPP, 5G, and / or NR network layers, the envisioned embodiments extend beyond implementations using specific network layer technologies. Similarly, potential implementations extend to all types of service layer architectures, systems, and embodiments. The techniques described herein can be applied independently and / or in combination with other resource configuration techniques.

[0249] The processes described herein can be implemented in computer programs, software, and / or firmware incorporated in computer-readable media for execution by a computer and / or processor. Examples of computer-readable media include, but are not limited to, electronic signals (transmitted via wired and / or wireless connections) and / or computer-readable storage media. Examples of computer-readable storage media include, but are not limited to, read-only memory (ROM), random access memory (RAM), registers, cache memory, semiconductor memory devices, magnetic media (such as, but not limited to, internal hard disks and removable disks), magneto-optical media, and / or optical media (such as compact disc (CD)-ROMs and / or digital versatile discs (DVDs)). The processor associated with the software can be used to implement a radio frequency transceiver used in WTRUs, terminals, base stations, RNCs, and / or any host computer.

[0250] It should be understood that the entity performing the processes described herein can be a logical entity, which can be implemented in the form of software (e.g., computer-executable instructions) stored in the memory of a mobile device, network node, or computer system and executed on the processor of that mobile device, network node, or computer system. That is, the processes can be implemented in the form of software (e.g., computer-executable instructions) stored in the memory of a mobile device and / or network node (such as a node or computer system), which executes the processes in discussion when executed by the node's processor. It should also be understood that any transmit and receive processes illustrated in the figures can be executed by the node's communication circuitry under the control of the node's processor and the computer-executable instructions (e.g., software) it executes.

[0251] The various techniques described herein can be implemented in combination with hardware or software, or, where appropriate, with a combination of both. Therefore, implementation schemes and apparatuses of the subject matter described herein, or certain aspects or portions thereof, can take the form of program code (e.g., instructions) embodied in a tangible medium including any other machine-readable storage medium, wherein when the program code is loaded into and executed by a machine such as a computer, that machine becomes an apparatus for practicing the subject matter described herein. Where the program code is stored on a medium, it is possible that the program code in question is stored on one or more media that collectively perform the actions in question; that is, one or more media together contain the code for performing the actions, but—in the case of more than one single medium—there is no requirement that any particular portion of the code is stored on any particular medium. Where the program code is executed on a programmable device, the computing device typically includes a processor, a processor-readable storage medium (including volatile and non-volatile memory and / or storage elements), at least one input device, and at least one output device. One or more programs can be implemented, for example, by using APIs, reusable controls, etc., or utilize the processes described in conjunction with the subject matter described herein. Such programs are preferably implemented in a high-level program or an object-oriented programming language to communicate with a computer system. However, if needed, one or more programs can be implemented in assembly language or machine language. In any case, the language can be a compiled or interpreted language, and it can be combined with a hardware implementation scheme.

[0252] While the exemplary embodiments may relate to utilizing aspects of the subject matter described herein within the context of one or more independent computing systems, the subject matter described herein is not limited thereto, but can be implemented in any computing environment, such as a network or distributed computing environment. Furthermore, aspects of the subject matter described herein can be implemented in or across multiple processing chips or devices, and storage can similarly be implemented across multiple devices. Such devices may include personal computers, network servers, handheld devices, supercomputers, or computers integrated into other systems such as automobiles and aircraft.

[0253] In describing preferred embodiments of the subject matter of this disclosure, as illustrated in the figures, specific terminology is used for clarity. However, the claimed subject matter is not intended to be limited to the specific terminology chosen so far, and it is to be understood that each particular element includes all technical equivalents that operate in a similar manner to accomplish a similar purpose.

Claims

1. A wireless transmit / receive unit (WTRU), comprising: The processor is configured as follows: Receive information indicating a first CSI-RS resource associated with a first set of Channel State Information Reference Signals (CSI-RS) ports and a second CSI-RS resource associated with a second set of CSI-RS ports; Receive CSI-RS on the first CSI-RS resource and the second CSI-RS resource; A first measurement is determined based on CSI-RS received on the first CSI-RS resource, and a second measurement is determined based on CSI-RS received on the second CSI-RS resource; A first precoding matrix indicator (PMI) associated with the first CSI-RS resource is determined based on the first measurement, and a second PMI associated with the second CSI-RS resource is determined based on the second measurement. as well as Send a Channel State Information (CSI) report to the network entity, wherein the CSI report indicates the first PMI and the second PMI.

2. The WTRU according to claim 1, wherein, The first CSI-RS resource and the second CSI-RS resource are in the CSI-RS resource set.

3. The WTRU according to claim 2, wherein, The CSI report further indicates a quantified in-phase measurement between the first PMI and the second PMI.

4. The WTRU according to claim 1, wherein, The first CSI-RS resource is in a first CSI-RS resource set, the second CSI-RS resource is in a second CSI-RS resource set different from the first CSI-RS resource set, and the CSI report further indicates in-phase measurements across the first PMI and the second PMI.

5. The WTRU according to claim 1, wherein, The processor is further configured to: The first measurement is determined based on the first polarization of the CSI-RS ports in the first CSI-RS port set; and The second measurement is determined based on the second polarization of the CSI-RS ports in the second set of CSI-RS ports, wherein the second polarization is different from the first polarization.

6. The WTRU according to claim 1, wherein, The information further indicates a third CSI-RS resource associated with a third CSI-RS port set and a fourth CSI-RS resource associated with a fourth CSI-RS port set, and the processor is further configured to: The CSI-RS is received on the third CSI-RS resource and the fourth CSI-RS resource; A third measurement is determined based on CSI-RS received on the third CSI-RS resource, and a fourth measurement is determined based on CSI-RS received on the fourth CSI-RS resource. as well as A third PMI associated with the third CSI-RS resource is determined based on the third measurement, and a fourth PMI associated with the fourth CSI-RS resource is determined based on the fourth measurement, wherein the CSI report further indicates the third PMI and the fourth PMI.

7. The WTRU according to claim 1, wherein, The processor is further configured to: determine, based on a time-based recursive mode, on which CSI-RS(s) or CSI-RS(s)(s) of the first and second CSI-RS(s) ...

8. The WTRU according to claim 1, wherein, The information further indicates a third CSI-RS resource associated with a third CSI-RS port set, wherein the second CSI-RS resource and the third CSI-RS resource are multiplexed on at least one of a time resource or a frequency resource, and the processor is configured to determine the second measurement based on the CSI-RS received on the second CSI-RS resource, including that the processor is configured to: Aggregate the second CSI-RS resource and the third CSI-RS resource to generate a combined CSI-RS resource; and The second measurement is determined based on the CSI-RS received on the combined CSI-RS resources.

9. The WTRU according to claim 1, wherein, The CSI-RS is a first CSI-RS, the CSI report is a first CSI report, and the processor is further configured to: Based on the first CSI-RS resource, the second CSI-RS resource, and the mode for assigning ports to the CSI-RS resource, determine the third CSI-RS resource associated with the third CSI-RS port set and the fourth CSI-RS resource associated with the fourth CSI-RS port set; Receive the second CSI-RS on the third CSI-RS resource and the fourth CSI-RS resource; A third measurement is determined based on a second CSI-RS received on the third CSI-RS resource, and a fourth measurement is determined based on a second CSI-RS received on the fourth CSI-RS resource. A third PMI associated with the third CSI-RS resource is determined based on the third measurement, and a fourth PMI associated with the fourth CSI-RS resource is determined based on the fourth measurement; as well as A second CSI report is sent to the network entity, wherein the second CSI report indicates the third PMI and the fourth PMI.

10. The WTRU according to claim 1, wherein, The first CSI-RS port set includes a first plurality of ports mapped to the first CSI-RS resource, and the second CSI-RS port set includes a second plurality of ports mapped to the second CSI-RS resource.

11. A method performed by a wireless transmit / receive unit (WTRU), the method comprising: Receive information indicating a first CSI-RS resource associated with a first set of Channel State Information Reference Signals (CSI-RS) ports and a second CSI-RS resource associated with a second set of CSI-RS ports; Receive CSI-RS on the first CSI-RS resource and the second CSI-RS resource; A first measurement is determined based on CSI-RS received on the first CSI-RS resource, and a second measurement is determined based on CSI-RS received on the second CSI-RS resource; A first precoding matrix indicator (PMI) associated with the first CSI-RS resource is determined based on the first measurement, and a second PMI associated with the second CSI-RS resource is determined based on the second measurement. as well as Send a Channel State Information (CSI) report to the network entity, wherein the CSI report indicates the first PMI and the second PMI.

12. The method according to claim 11, wherein, The first CSI-RS resource and the second CSI-RS resource are in the CSI-RS resource set.

13. The method according to claim 12, wherein, The CSI report further indicates a quantified in-phase measurement between the first PMI and the second PMI.

14. The method according to claim 11, wherein, The first CSI-RS resource is in a first CSI-RS resource set, the second CSI-RS resource is in a second CSI-RS resource set different from the first CSI-RS resource set, and the CSI report further indicates in-phase measurements across the first PMI and the second PMI.

15. The method according to claim 11, wherein, The method further includes: The first measurement is determined based on the first polarization of the CSI-RS ports in the first CSI-RS port set; and The second measurement is determined based on the second polarization of the CSI-RS ports in the second set of CSI-RS ports, wherein the second polarization is different from the first polarization.

16. The method according to claim 11, wherein, The information further indicates a third CSI-RS resource associated with a third CSI-RS port set and a fourth CSI-RS resource associated with a fourth CSI-RS port set, and the method further includes: The CSI-RS is received on the third CSI-RS resource and the fourth CSI-RS resource; A third measurement is determined based on CSI-RS received on the third CSI-RS resource, and a fourth measurement is determined based on CSI-RS received on the fourth CSI-RS resource; and A third PMI associated with the third CSI-RS resource is determined based on the third measurement, and a fourth PMI associated with the fourth CSI-RS resource is determined based on the fourth measurement, wherein the CSI report further indicates the third PMI and the fourth PMI.

17. The method according to claim 11, wherein, The method further includes: determining, based on a time-based recursive pattern, which CSI-RS resource(s) of the first CSI-RS resource and the second CSI-RS resource was received on which CSI-RS resource(s).

18. The method according to claim 11, wherein, The information further indicates a third CSI-RS resource associated with a third CSI-RS port set, wherein the second CSI-RS resource and the third CSI-RS resource are multiplexed on at least one of time resources or frequency resources, and determining the second measurement based on the CSI-RS received on the second CSI-RS resource includes: Aggregate the second CSI-RS resource and the third CSI-RS resource to generate a combined CSI-RS resource; and The second measurement is determined based on the CSI-RS received on the combined CSI-RS resources.

19. The method according to claim 11, wherein, The CSI-RS is a first CSI-RS, the CSI report is a first CSI report, and the method further includes: Based on the first CSI-RS resource, the second CSI-RS resource, and the mode for assigning ports to the CSI-RS resource, determine the third CSI-RS resource associated with the third CSI-RS port set and the fourth CSI-RS resource associated with the fourth CSI-RS port set; Receive the second CSI-RS on the third CSI-RS resource and the fourth CSI-RS resource; A third measurement is determined based on a second CSI-RS received on the third CSI-RS resource, and a fourth measurement is determined based on a second CSI-RS received on the fourth CSI-RS resource. A third PMI associated with the third CSI-RS resource is determined based on the third measurement, and a fourth PMI associated with the fourth CSI-RS resource is determined based on the fourth measurement; and A second CSI report is sent to the network entity, wherein the second CSI report indicates the third PMI and the fourth PMI.

20. The method according to claim 11, wherein, The first CSI-RS port set includes a first plurality of ports mapped to the first CSI-RS resource, and the second CSI-RS port set includes a second plurality of ports mapped to the second CSI-RS resource.

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