User equipment and base station for wireless communication and corresponding methods and media

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) can receive from a base station a configuration of a set of resource elements for LTE cell-specific reference signal (LTE-CRS) interference measurements associated with one or more neighboring Long Term Evolution (LTE) cells. The UE can perform the LTE-CRS interference measurements on the set of resource elements. The UE can transmit an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurements. Numerous other aspects are described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. non-provisional patent application No. 17 / 644,506, filed on December 15, 2021, entitled “LTE CELL-SPECIFICREFERENCE SIGNAL INTERFERENCE HANDLING,” which is hereby expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for Long Term Evolution (LTE) Cell-Specific Reference Signal (LTE-CRS) interference handling. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may utilize multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more base stations that support communications for a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink and uplink communications. A "downlink" (or "DL") refers to the communication link from a base station to a UE, and an "uplink" (or "UL") refers to the communication link from a UE to a base station.

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at a city, country, region and / or global level. New Radio (NR) (which may be referred to as 5G) is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink to better integrate with other open standards, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements to LTE, NR and other radio access technologies remain useful. Summary of the Invention

[0007] Some aspects described herein relate to a user equipment (UE) for wireless communication. The user equipment may include: a memory; and one or more processors coupled to the memory. The one or more processors may be configured to receive, from a base station, a configuration of a set of resource elements for LTE cell-specific reference signal (LTE-CRS) interference measurements associated with one or more neighboring long term evolution (LTE) cells. The one or more processors may be configured to perform LTE-CRS interference measurements on the set of resource elements. The one or more processors may be configured to transmit an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurements.

[0008] Some aspects described herein relate to a base station for wireless communication. The base station may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to transmit to a UE a configuration of a resource element set for LTE-CRS interference measurement associated with one or more neighboring LTE cells. The one or more processors may be configured to receive, from the UE, an interference measurement indication associated with the LTE-CRS interference measurement in the resource element set.

[0009] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving, from a base station, a configuration of a set of resource elements for LTE-CRS interference measurements associated with one or more neighboring LTE cells. The method may include performing the LTE-CRS interference measurements on the set of resource elements. The method may include transmitting an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurements.

[0010] Some aspects described herein relate to a method of wireless communication performed by a base station. The method may include transmitting to a UE a configuration of a set of resource elements for LTE-CRS interference measurement associated with one or more neighboring LTE cells. The method may include receiving, from the UE, an interference measurement indication associated with the LTE-CRS interference measurement in the set of resource elements.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication by a UE. The instruction set, when executed by one or more processors of the UE, may cause the UE to receive, from a base station, a configuration of a set of resource elements for LTE-CRS interference measurements associated with one or more neighboring LTE cells. The instruction set, when executed by one or more processors of the UE, may cause the UE to perform LTE-CRS interference measurements on the set of resource elements. The instruction set, when executed by one or more processors of the UE, may cause the UE to transmit an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurements.

[0012] Some aspects described herein relate to a non-transitory computer-readable medium storing a set of instructions for wireless communication by a base station. The set of instructions, when executed by one or more processors of the base station, may cause the base station to transmit to a UE a configuration of a set of resource elements for LTE-CRS interference measurements associated with one or more neighboring LTE cells. The set of instructions, when executed by one or more processors of the base station, may cause the base station to receive, from the UE, an interference measurement indication associated with the LTE-CRS interference measurement in the set of resource elements.

[0013] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving, from a base station, a configuration of a set of resource elements for LTE-CRS interference measurements associated with one or more neighboring LTE cells. The apparatus may include means for performing LTE-CRS interference measurements on the set of resource elements. The apparatus may include means for transmitting an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurements.

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting to a UE a configuration of a set of resource elements for LTE-CRS interference measurement associated with one or more neighboring LTE cells. The apparatus may include means for receiving, from the UE, an interference measurement indication associated with the LTE-CRS interference measurement in the set of resource elements.

[0015] Aspects of the present invention generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as fully described herein with reference to and as illustrated in the accompanying drawings and description.

[0016] The features and technical advantages of the examples according to the present disclosure have been outlined quite broadly above so that the following detailed description may be better understood. Additional features and advantages will be described below. The concepts and specific examples disclosed may be readily used as a basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of protection of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and not as a definition of limitations of the claims.

[0017] Although various aspects are described in the present disclosure by the explanation of some examples, it will be understood by those skilled in the art that such aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment, and / or artificial intelligence devices). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components and / or system-level components. The equipment incorporated into the various aspects and features described may include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals may include one or more components (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders and / or summers) for analog and digital purposes. The various aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements, and / or end-user devices of various sizes, shapes and compositions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to fully understand the above-mentioned features of the present disclosure, a more detailed description of the invention briefly summarized above can be obtained by reference to various aspects (some of which are shown in the accompanying drawings). However, it should be noted that the drawings only illustrate certain typical aspects of the present disclosure and are not therefore to be considered as limiting the scope thereof, as the specification may admit to other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 is a diagram illustrating an example of communication between a base station and a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of Long Term Evolution (LTE) Cell-Specific Reference Signal (LTE-CRS) interference in a New Radio (NR) cell according to the present disclosure.

[0022] Figures 4 to 6 is a diagram illustrating an example associated with LTE-CRS interference handling according to the present disclosure.

[0023] Figures 7 and 8 is a diagram illustrating an example process associated with LTE-CRS interference handling according to the present disclosure.

[0024] Figures 9 and 10 is a diagram of an example apparatus for wireless communications according to the present disclosure. DETAILED DESCRIPTION

[0025] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms, and should not be interpreted as being limited to any specific structure or function presented throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of protection of the present disclosure will be fully conveyed to those skilled in the art. It will be appreciated by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods that are practiced using other structures, functions, or structures and functions in addition to or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0026] Several aspects of telecommunications systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0027] Although aspects may be described herein using terminology generally associated with 5G or New Radio (NR) radio access technology (RAT), aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or post-5G RATs (e.g., 6G).

[0028] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. Wireless network 100 may be or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, among other examples. Wireless network 100 may include one or more base stations 110 (shown as BS110a, BS110b, BS110c, and BS110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. Base station 110 is an entity that communicates with UE 120. Base station 110 (sometimes referred to as a BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and / or a transmission reception point (TRP). Each base station 110 may provide communication coverage for a specific geographic area. In the 3rd Generation Partnership Project (3GPP), the term "cell" can refer to the coverage area of ​​a base station 110 and / or a base station subsystem serving the coverage area, depending on the context in which the term is used.

[0029] The base station 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by a UE 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by a UE 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by a UE 120 that has an association with the femto cell (e.g., a UE 120 in a closed subscriber group (CSG)). A base station 110 for a macro cell may be referred to as a macro base station. A base station 110 for a pico cell may be referred to as a pico base station. A base station 110 for a femto cell may be referred to as a femto base station or a home base station. In Figure 1 In the example shown in , BS 110a may be a macro base station for macrocell 102a, BS 110b may be a pico base station for picocell 102b, and BS 110c may be a femto base station for femtocell 102c. A base station may support one or more (eg, three) cells.

[0030] In some examples, cells may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile base station 110 (e.g., a mobile base station). In some examples, base stations 110 may interconnect with each other and / or one or more other base stations 110 or network nodes (not shown) in wireless network 100 using any suitable transport network over various types of backhaul interfaces, such as direct physical connections or virtual networks.

[0031] The wireless network 100 may include one or more relay stations. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a base station 110 or a UE 120) and send transmissions of data to a downstream station (e.g., a UE 120 or a base station 110). A relay station may be a UE 120 that is capable of relaying transmissions for other UEs 120. Figure 1 In the example shown in FIG, BS 110d (e.g., a relay base station) can communicate with BS 110a (e.g., a macro base station) and UE 120d to facilitate communication between BS 110a and UE 120d. Base station 110 that relays communication may be referred to as a relay station, relay base station, relay, etc.

[0032] The wireless network 100 may be a heterogeneous network that includes different types of base stations 110, such as macro base stations, pico base stations, femto base stations, relay base stations, etc. These different types of base stations 110 may have different transmission power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro base station may have a high transmission power level (e.g., 5 watts to 40 watts), while a pico base station, a femto base station, and a relay base station may have a lower transmission power level (e.g., 0.1 watt to 2 watts).

[0033] A network controller 130 may be coupled to or in communication with a set of base stations 110 and may provide coordination and control for the base stations 110. The network controller 130 may communicate with the base stations 110 via backhaul communication links. The base stations 110 may also communicate directly with each other or indirectly via wireless or wired backhaul communication links.

[0034] UEs 120 may be dispersed throughout wireless network 100, and each UE 120 may be stationary or mobile. UEs 120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UEs 120 may be cellular phones (e.g., smartphones), personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, laptop computers, cordless phones, wireless local loop (WLL) stations, tablet computers, cameras, gaming devices, netbooks, smartbooks, ultrabooks, medical devices, biometric devices, wearable devices (e.g., smart watches, smart clothing, smart glasses, smart wristbands, smart jewelry (e.g., smart rings or smart bracelets)), entertainment devices (e.g., music devices, video devices, and / or satellite radios), vehicle components or sensors, smart meters / sensors, industrial manufacturing equipment, global positioning system devices, and / or any other suitable device configured to communicate via a wireless medium.

[0035] Some UEs 120 may be considered machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that may communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet of Things (IoT) devices and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered client equipment. The UE 120 may be included within a housing that houses components of the UE 120, such as a processor component and / or a memory component. In some examples, the processor component and the memory component may be coupled together. For example, the processor component (e.g., one or more processors) and the memory component (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0036] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. A RAT may be referred to as a radio technology, air interface, etc. A frequency may be referred to as a carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0037] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary to communicate with each other). For example, UE 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which can include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), and / or mesh networks. In such examples, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0038] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified with the frequency range names FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as a “sub-6 GHz” band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as a “millimeter wave” band in documents and articles, although different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a “millimeter wave” band by the International Telecommunication Union (ITU).

[0039] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating band for these mid-band frequencies as the frequency range designation FR3 (7.125 GHz–24.25 GHz). The frequency bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation to more than 52.6 GHz. For example, three higher operating bands have been identified as the frequency range designations FR4a or FR4-1 (52.6 GHz–71 GHz), FR4 (52.6 GHz–114.25 GHz), and FR5 (114.25 GHz–300 GHz). Each of these higher frequency bands falls within the EHF band.

[0040] Considering the above examples, unless otherwise explicitly stated, it should be understood that if the term "sub-6 GHz" or the like is used herein, the term can be broadly construed to mean frequencies that can be below 6 GHz, can be within FR1, or can include mid-band frequencies. Additionally, unless otherwise explicitly stated, it should be understood that if the term "millimeter wave" or the like is used herein, the term can be broadly construed to mean frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a, FR4-1, and / or FR5, or can be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0041] In some aspects, UE 120 may include a communications manager 140. As described in greater detail elsewhere herein, communications manager 140 may receive, from a base station, a configuration of a set of resource elements (REs) for LTE cell-specific reference signal (LTE-CRS) interference measurements associated with one or more neighboring LTE cells; perform LTE-CRS interference measurements on the set of REs; and transmit an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurements. Additionally or alternatively, communications manager 140 may perform one or more other operations described herein.

[0042] In some aspects, base station 110 may include a communication manager 150. As described in more detail elsewhere herein, communication manager 150 may transmit to a UE a configuration of a set of REs for LTE-CRS interference measurement associated with one or more neighboring LTE cells; and receive from the UE an interference measurement indication associated with the LTE-CRS interference measurement in the set of REs. Additionally or alternatively, communication manager 150 may perform one or more other operations described herein.

[0043] As indicated above, Figure 1 Provided as an example. Other examples can be found in the Figure 1 Different than described.

[0044] Figure 2 2 is a diagram illustrating an example 200 of communication between a base station 110 and a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T ≥ 1). The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R ≥ 1).

[0045] At base station 110, transmit processor 220 may receive data intended for UE 120 (or a set of UEs 120) from data source 212. Transmit processor 220 may select one or more modulation and coding schemes (MCS) for UE 120 based at least in part on one or more channel quality indicators (CQIs) received from UE 120. Base station 110 may process (e.g., encode and modulate) the data for UE 120 based at least in part on the MCS selected for UE 120 and provide data symbols for UE 120. Transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, as applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modulators) (shown as modems 232a through 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may process a corresponding output symbol stream (e.g., for OFDM) using a corresponding modulator component to obtain an output sample stream. Each modem 232 may further process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream using a corresponding modulator component to obtain a downlink signal. Modems 232a through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a through 234t).

[0046] At UE 120, a set of antennas 252 (shown as antennas 252a through 252r) may receive downlink signals from base station 110 and / or other base stations 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a through 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain input samples. Each modem 254 may use the demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from modem 254, may perform MIMO detection on the received symbols where applicable, and may provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter, among other parameters. In some examples, one or more components of the UE 120 may be included in a housing 284.

[0047] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0048] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc. The antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), sets of coplanar antenna elements, sets of non-coplanar antenna elements, and / or be coupled to one or more transmit and / or receive components (such as, Figure 2 One or more antenna elements of one or more components in.

[0049] On the uplink, at UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from a controller / processor 280. The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by a TX MIMO processor 266, as applicable, further processed by a modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to execute the instructions herein (eg, reference Figures 4 to 10 )Aspects of any of the methods described.

[0050] At base station 110, uplink signals from UE 120 and / or other UEs may be received by antenna 234, processed by modem 232 (e.g., a demodulator component of modem 232, shown as DEMOD), detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 may provide decoded data to a data sink 239 and decoded control information to controller / processor 240. Base station 110 may include a communication unit 244 and may communicate with network controller 130 via communication unit 244. Base station 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communications. In some examples, modem 232 of base station 110 may include a modulator and a demodulator. In some examples, base station 110 may include a transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to execute the instructions herein (e.g., reference 242). Figures 4 to 10 )Aspects of any of the methods described.

[0051] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other components of the UE 120 may perform one or more techniques associated with LTE-CRS interference handling, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the may perform or direct e.g. Figure 7 The process of 700 Figure 8 800 and / or operations of other processes as described herein. Memory 242 and memory 282 may store data and program codes for base station 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly or after compilation, conversion, and / or interpretation) by one or more processors of base station 110 and / or UE 120, may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example, Figure 7 The process of 700 Figure 8 The operations of process 800 and / or other processes as described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0052] In some aspects, the UE 120 includes means for receiving, from a base station, a configuration of a set of REs for LTE-CRS interference measurements associated with one or more neighboring LTE cells; means for performing LTE-CRS interference measurements on the set of REs; and / or means for transmitting an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurements. The means for the UE 120 to perform the operations described herein may include, for example, one or more of the communication manager 140, the antenna 252, the modem 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the controller / processor 280, or the memory 282.

[0053] In some aspects, the base station 110 includes means for transmitting to a UE a configuration of a set of REs for LTE-CRS interference measurement associated with one or more neighboring LTE cells; and / or means for receiving from the UE an interference measurement indication associated with the LTE-CRS interference measurement in the set of REs. The means for the base station 110 to perform the operations described herein may include, for example, one or more of the communication manager 150, the transmit processor 220, the TX MIMO processor 230, the modem 232, the antenna 234, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246.

[0054] Although Figure 2 The blocks in FIG. 2 are shown as distinct components, but the functionality described above with respect to these blocks may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functionality described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0055] As indicated above, Figure 2 Provided as an example. Other examples can be found in the Figure 2 Different than described.

[0056] Figure 3 300 and 310 are diagrams illustrating examples of LTE-CRS interference in an NR cell according to the present disclosure. Figure 3 As shown, examples 300 and 310 illustrate scenarios where a UE (e.g., UE 120) is in a location where both LTE (e.g., 4G) and NR (e.g., 5G) coverage are available. In such scenarios, an NR UE (e.g., a UE communicating with a base station via NR coverage) may experience interference from an LTE-CRS. An LTE-CRS is a reference signal transmitted in an LTE cell.

[0057] Example 300 illustrates a network in which a UE (e.g., UE 120) is located in a cell associated with a base station (e.g., base station 110) and the base station operates using dynamic spectrum sharing (DSS). DSS is an antenna technology that enables the use of LTE and NR in parallel in the same frequency band. As shown in example 300, DSS operation enables the base station to communicate with the UE (e.g., and / or other UEs in the cell associated with the base station) using LTE or NR. In the case where the UE is a NR UE, when receiving NR downlink communications (e.g., physical downlink shared channel (PDSCH) and / or physical downlink control channel (PDCCH) communications) from the base station, the UE may experience interference due to LTE-CRS transmissions from the base station. For a cell associated with a base station operating using DSS, all NR UEs in the cell may experience the same LTE-CRS interference from the same base station on the same carrier.

[0058] Example 310 shows a network in which an LTE cell and an NR cell are operated by neighboring base stations (e.g., base station 110). As shown in Example 310, a first base station operates an LTE cell and a second base station operates an NR cell. A UE (e.g., 120) may be located in an LTE cell and an NR cell. In the case where the UE is an NR UE, when receiving NR downlink communications (e.g., PDSCH and / or PDCCH communications) from the second base station, the UE may experience interference due to LTE-CRS transmissions from the first base station. In the case where the LTE cell and the NR cell are operated by neighboring base stations, different UEs in the NR cell may suffer different amounts of LTE-CRS interference (or no LTE-CRS interference) from the LTE base station (e.g., the first base station).

[0059] In some examples, the NR base station may configure the NR UE with a semi-static cell common rate matching mode for PDSCH rate matching around LTE-CRS transmissions. In this case, when receiving PDSCH communications from the NR base station, the NR UE may use the configured rate matching mode to rate match around the resources associated with the LTE-CRS transmission. This may be effective for reducing LTE-CRS interference in DSS cells because all NR UEs experience the same LTE-CRS interference in such DSS cells. However, in the case where a UE in an NR cell experiences LTE-CRS interference from one or more neighboring LTE cells, the semi-static cell common rate matching configuration may not be as effective. In this case, because different UEs in the NR cell experience different amounts of LTE-CRS interference (or no LTE-CRS interference) from one or more neighboring LTE cells, the semi-static cell-common rate matching mode configuration may cause some UEs to perform unnecessary rate matching (e.g., causing unnecessary increases in overhead and latency for PDSCH and / or PDCCH communications) and / or some UEs to not rate match around LTE-CRS transmissions that cause significant interference (e.g., causing reduced reliability for PDSCH and / or PDCCH communications).

[0060] Some techniques and apparatus described herein enable a UE to receive, from a base station (e.g., an NR base station), a configuration of a set of REs for LTE-CRS measurements associated with one or more neighboring LTE cells. The UE may perform LTE interference measurements on the set of REs, and the UE may transmit an interference measurement indication to the base station based at least in part on the LTE-CRS measurements. The base station may transmit a rate matching indication to the UE, which identifies an LTE-CRS rate matching mode to be used by the UE (e.g., for receiving PDSCH and / or PDCCH communications). In some aspects, the interference measurement indication may include corresponding interference measurements for one or more LTE-CRSs. In some aspects, the interference measurement indication may include a recommended LTE-CRS rate matching mode identified by the UE. Thus, the UE may perform rate matching using a UE-specific LTE-CRS rate matching mode based at least in part on the LTE-CRS interference measured by the UE. Thus, the UE may perform rate matching around LTE-CRS transmissions that cause interference to downlink communications to the UE (e.g., resulting in reduced interference and increased reliability of downlink communications) without performing unnecessary rate matching around LTE-CRS transmissions that do not cause significant interference to downlink communications to the UE (e.g., resulting in reduced overhead and latency for downlink communications compared to a cell-common configuration applied to all UEs in an NR cell).

[0061] As indicated above, Figure 3 Provided as an example. Other examples can be found in the Figure 3 Different than described.

[0062] Figure 4 4 is a diagram illustrating an example 400 associated with LTE-CRS interference handling according to the present disclosure. Figure 4 As shown, example 400 includes communications between base station 110 and UE 120. In some aspects, base station 110 and UE 120 may be included in a wireless network, such as wireless network 100. Base station 110 and UE 120 may communicate via a wireless access link, which may include an uplink and a downlink.

[0063] In some aspects, base station 110 may be a NR base station (e.g., a 5G base station or gNB), and UE 120 may be a NR UE. In some aspects, a NR cell associated with base station 110 may have one or more neighboring LTE cells. The neighboring LTE cells may be associated with one or more neighboring base stations (e.g., LTE base stations and / or base stations operating using DSS) of base station 110. UE 120 may be located in an NR cell associated with base station 110 and one or more of the neighboring LTE cells.

[0064] like Figure 4 As shown by reference numeral 405, the base station 110 may transmit to the UE 120 a configuration of a resource set for LTE-CRS measurements associated with one or more neighboring LTE cells. The UE 120 may receive the configuration of the resource set for LTE-CRS measurements. For example, the base station 110 may transmit the configuration to the UE 120 in a radio resource control (RRC) message. The configuration may identify resources (e.g., a set of REs) for the UE 120 to perform LTE-CRS interference measurements. The set of REs may be configured in a pattern that matches a pattern of REs configured for transmitting one or more LTE-CRSs in one or more neighboring LTE cells.

[0065] Neighboring LTE cells may be configured with different LTE-CRSs transmitted from different antenna ports. LTE-CRSs transmitted in different neighboring LTE cells may have different v shift values ​​and / or different pseudo-random sequences applied to LTE-CRS REs. In some aspects, a set of REs may be associated with a RE pattern configured for a single LTE-CRS in a single neighboring LTE cell. For example, a set of REs may be associated with an antenna port having a v shift value (e.g., an antenna port of a neighboring LTE cell). In some aspects, a set of REs may be associated with a RE pattern configured for multiple LTE-CRSs in a single neighboring LTE cell. For example, a set of REs may be associated with multiple antenna ports having a v shift value (e.g., multiple antenna ports of a neighboring LTE cell). In some aspects, a set of REs may be associated with a RE pattern configured for LTE-CRSs in multiple neighboring LTE cells. For example, a set of REs may be associated with one or more antenna elements having multiple v shift values ​​(e.g., one or more antenna elements in multiple neighboring LTE cells). In some aspects, a base station 110 may configure a UE 120 using one or more sets of REs to perform LTE-CRS interference measurements. For example, in the case where the base station 110 transmits a configuration of multiple RE sets, each RE set is associated with an RE pattern configured for a corresponding LTE-CRS set in one or more adjacent LTE cells (e.g., a corresponding RE set covering one or more antenna elements having one or more v shift values).

[0066] In some aspects, the base station 110 may configure the UE 120 to measure LTE-CRS interference using channel state information (CSI) interference measurement (CSI-IM) based measurements on a set of REs. For example, the set of REs may be a set of zero-power REs for performing CSI-IM measurements in a pattern associated with LTE-CRS transmissions in one or more neighboring LTE cells (e.g., associated with one or more antenna ports). In this manner, the UE 120 may be configured to measure interference of the LTE-CRS transmitted in the set of REs indicated in the configuration. In some aspects, the base station 110 may transmit and the UE 120 may receive a configuration of one or more zero-power RE sets for performing LTE-CRS interference measurements.

[0067] In some aspects, the base station 110 may configure the UE 120 to measure LTE-CRS interference using measurements based on non-zero power CSI reference signals (NZP-CSI-RS) on a set of REs. For example, the set of REs may be a set of NZP-CSI-RS REs in a pattern associated with LTE-CRS transmissions in one or more neighboring LTE cells. In this case, the UE 120 may measure the quality of the LTE-CRS transmissions in the REs (e.g., as the expected CSI reference signal (CSI-RS)), and the UE 120 may determine the interference measurement based on the measured quality. In the case where the NZP-CSI-RS RE set is configured for LTE-CRS interference measurement, the UE 120 may also be configured with one or more parameters associated with sequence generation of the LTE-CRS. For example, the configuration may include parameters associated with sequence generation of the LTE-CRS, such as a cell identifier, slot index, symbol index, bandwidth, and / or starting physical resource block (PRB) index associated with the LTE-CRS. In some aspects, base station 110 may transmit and UE 120 may receive a configuration of one or more NZP-CSI-RS RE sets for performing LTE-CRS interference measurements.

[0068] like Figure 4As further shown by reference numeral 410, UE 120 may perform LTE-CRS interference measurement on a set of REs. In some aspects, when the set of REs configured for LTE-CRS interference measurement is a set of zero-power REs, UE 120 may perform a respective interference measurement (e.g., a CSI-IM-based measurement) on each RE in the set of REs, and UE 120 may estimate interference power (and / or other measures of interference) for the set of REs based at least in part on the respective interference measurements for the REs. For example, UE 120 may calculate the covariance of interference plus noise for each RE (e.g., based at least in part on a respective signal-to-interference-plus-noise ratio (SINR) measurement), and UE 120 may estimate interference power (and / or other measures of interference) for the set of REs based at least in part on the interference plus noise covariance calculated for each RE.

[0069] In some aspects, when the RE set configured for LTE-CRS interference measurement is the NZP-CSI-RS RE set, the UE 120 may perform a measurement of the quality of the corresponding LTE-CRS transmission for each RE in the RE set, and the UE 120 may estimate the interference power of the RE set based at least in part on the corresponding quality measurement of the RE. For example, the UE 120 may calculate the interference power by performing coherent detection of the LTE-CRS on each RE based at least in part on the cell identifier indicated in the configuration and / or other parameters associated with sequence generation of the LTE-CRS (e.g., slot index, symbol index, bandwidth, and / or starting PRB index).

[0070] In some aspects, the UE 120 may determine (e.g., measure and / or calculate) a corresponding interference measurement for one or more LTE-CRS hypotheses associated with a set of REs. Each LTE-CRS hypothesis may be associated with a corresponding LTE-CRS antenna port of a neighboring LTE cell in one or more neighboring LTE cells. For example, each LTE-CRS hypothesis may be a corresponding LTE-CRS associated with an antenna port and a v shift value. The interference measurement determined by the UE 120 for the LTE-CRS hypothesis may be an average interference measurement (e.g., average power, quality, and / or other interference measurements of the measured interference) for the REs associated with the LTE-CRS hypothesis in the set of REs. For example, the REs associated with the LTE-CRS hypothesis may be all REs in the set of REs or a subset of the REs in the set of REs. In some aspects, the corresponding average interference measurement determined by UE 120 for each LTE-CRS hypothesis may be at least one of an RSSI value (e.g., an average RSSI value of LTE-CRS REs), an RSRP value (e.g., an average RSRP value of LTE-CRS REs), an RSRQ value (e.g., an RSRQ value of LTE-CRS REs), or an SINR value (e.g., an average SINR value of LTE-CRS REs). In some aspects, when UE 120 is configured with CSI-IM-based interference measurement (e.g., zero-power REs), UE 120 may determine at least the average RSSI value for each LTE-CRS hypothesis. In some aspects, when UE 120 is configured with NZP-CSI-RS-based interference measurement, UE 120 may determine at least one of an average RSRP, RSRQ, or SINR value for each LTE-CRS.

[0071] like Figure 4 As further shown by reference numeral 415, UE 120 may transmit an interference measurement indication to base station 110 based at least in part on the LTE-CRS interference measurement on the set of REs. Base station 110 may receive the interference measurement indication transmitted by UE 120.

[0072] In some aspects, the interference measurement indication may include a report indicating interference measurements performed by the UE 120. For example, the UE 120 may transmit to the base station 110 a report indicating corresponding interference measurements for one or more LTE-CRS hypotheses associated with the RE set. In this case, the UE 120 may transmit to the base station 110 corresponding average interference measurements (e.g., RSSI, RSRP, RSRQ, and / or SINR) determined for one or more of the LTE-CRS hypotheses with respect to the RE set. In some aspects, the UE 120 may transmit interference measurements (e.g., average interference measurements) for all of the one or more LTE-CRS hypotheses associated with the RE set. In some aspects, the UE 120 may determine an order in which to report interference measurements for the LTE-CRS hypotheses and / or a selection of which of the LTE-CRS hypotheses to report interference based at least in part on the corresponding interference measurements (e.g., interference power) for the LTE-CRS hypotheses. For example, UE 120 may report the average interference measurement of the N CRS hypotheses with the highest average interference power measurement for the RE set (e.g., the N strongest interferers for LTE-CRS hypotheses). In this case, N may be indicated in the configuration or pre-configured according to the wireless communication standard, etc.

[0073] In some aspects, the reporting of interference measurements from the UE 120 to the base station 110 may be periodic, semi-persistent, or aperiodic. In some aspects, the UE 120 may transmit the report to the base station 110 in uplink control information (UCI) and / or CSI feedback (e.g., in a CSI report).

[0074] like Figure 4 As further shown by reference numeral 420, the base station 110 may transmit a rate matching indication to the UE 120, the rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications. The LTE-CRS rate matching pattern may be a rate matching pattern for performing rate matching around LTE-CRS REs when receiving downlink communications. In some aspects, the LTE-CRS rate matching pattern may include an LTE-CRS rate matching pattern for PDSCH communications and / or an LTE-CRS rate matching / puncturing pattern for PDCCH communications.

[0075] The base station 110 may determine an LTE-CRS rate matching mode (e.g., for PDSCH and / or PDCCH) based at least in part on an interference measurement indication received from the UE 120. For example, the base station 110 may receive a report including corresponding interference measurements for one or more LTE-CRS hypotheses. The base station 110 may then determine, for each LTE-CRS hypothesis, whether the UE 120 is to perform rate matching (e.g., for PDSCH and / or PDCCH reception) around REs associated with the LTE-CRS hypothesis based at least in part on the corresponding interference measurement (or measurements) reported for the LTE-CRS hypothesis. For example, the base station 110 may determine, based at least in part on the interference measurement indicated in the report received from the UE 120, whether the UE 120 is to perform rate matching around all LTE-CRS REs in the RE set, around a subset of LTE-CRS REs in the RE set (e.g., associated with one or more LTE-CRS hypotheses), or not to perform rate matching around LTE-CRS REs in the RE set. Base station 110 may then transmit a rate matching indication to UE 120 , the rate matching indication identifying the LTE-CRS rate matching pattern determined for UE 120 (eg, a UE-specific LTE-CRS rate matching pattern for UE 120 ).

[0076] In some aspects, base station 110 may transmit a rate matching indication in an RRC message, a medium access control (MAC) control element (MAC-CE), or downlink control information (DCI) to UE 120. For example, base station 110 may indicate the LTE-CRS rate matching mode for UE 120 via a semi-static configuration (e.g., in an RRC message) or via a dynamic indication (e.g., in a MAC-CE or DCI).

[0077] In some aspects, base station 110 may transmit one or more downlink communications to UE 120, and UE 120 may perform rate matching on the one or more downlink communications according to an LTE-CRS rate matching pattern identified by a rate matching indication received from base station 110. For example, UE 120 may perform rate matching on one or more PDSCH communications according to an LTE-CRS rate matching pattern for the PDSCH identified by the rate matching indication received from base station 110. Additionally or alternatively, UE 120 may perform rate matching (and / or puncturing) on ​​the one or more PDCCH communications according to an LTE-CRS rate matching / puncturing pattern for the PDCCH identified by the rate matching indication received from base station 110.

[0078] As described herein, base station 110 may transmit a configuration of a set of REs for LTE-CRS measurements associated with one or more neighboring LTE cells. UE 120 may perform LTE interference measurements on the set of REs, and UE 120 may transmit an interference measurement indication to base station 110 based at least in part on the LTE-CRS measurements. For example, the interference measurement indication may include corresponding interference measurements for one or more LTE-CRSs. Base station 110 may transmit a rate matching indication to UE 120 that identifies an LTE-CRS rate matching pattern to be used by UE 120 (e.g., for receiving PDSCH and / or PDCCH communications). Thus, UE 120 may perform rate matching using a UE-specific LTE-CRS rate matching pattern determined by base station 110 at least in part based on the LTE-CRS interference measured by UE 120. Thus, UE 120 may perform rate matching around LTE-CRS transmissions that cause interference to downlink communications to UE 120 (e.g., resulting in reduced interference and increased reliability of downlink communications) without performing unnecessary rate matching around LTE-CRS transmissions that do not cause significant interference to downlink communications to UE 120 (e.g., resulting in reduced overhead and latency for downlink communications compared to a cell-common configuration applied to all UEs in the NR cell).

[0079] As indicated above, Figure 4 Provided as an example. Other examples can be found in the Figure 4 Different than described.

[0080] Figure 5 5 is a diagram illustrating an example 500 associated with LTE-CRS interference handling according to the present disclosure. Figure 5 As shown, example 500 shows an example of RE sets 505, 510, and 515 configured for LTE-CRS measurements. Each RE set 505, 510, and 515 includes REs (e.g., in the time domain and the frequency domain) configured for UE 120 to perform corresponding LTE-CRS measurements. Figure 4 As described, a set of REs configured for LTE-CRS measurements may include an RE pattern associated with REs configured for transmission (e.g., from one or more antenna ports) of one or more LTE-CRS in one or more neighboring LTE cells (e.g., with one or more v shift values).

[0081] like Figure 5As shown, RE set 505 includes a set of REs associated with an RE pattern configured for LTE-CRS transmission associated with four antenna ports (e.g., port 1, port 2, port 3, and port 4) of a neighboring LTE cell (e.g., vshift value = 0). RE set 510 includes a set of REs associated with an RE pattern configured for LTE-CRS transmission associated with four antenna ports (e.g., port 1, port 2, port 3, and port 4) of another neighboring LTE cell (e.g., vshift = 1). RE set 515 includes a set of REs associated with an RE pattern configured for two antenna ports in a first neighboring LTE cell (e.g., port 1 and port 2, vshift = 1) and an RE pattern configured for two antenna ports in a second neighboring LTE cell (e.g., port 1 and port 2, vshift = 2).

[0082] As indicated above, Figure 5 Provided as an example. Other examples can be found in the Figure 5 Different than described.

[0083] Figure 6 6 is a diagram illustrating an example 600 associated with LTE-CRS interference handling according to the present disclosure. Figure 6 As shown, example 600 includes communications between base station 110 and UE 120. In some aspects, base station 110 and UE 120 may be included in a wireless network, such as wireless network 100. Base station 110 and UE 120 may communicate via a wireless access link, which may include an uplink and a downlink.

[0084] In some aspects, base station 110 may be a NR base station (e.g., a 5G base station or gNB), and UE 120 may be a NR UE. In some aspects, a NR cell associated with base station 110 may have one or more neighboring LTE cells. The neighboring LTE cells may be associated with one or more neighboring base stations (e.g., LTE base stations and / or base stations operating using DSS) of base station 110. UE 120 may be located in an NR cell associated with base station 110 and one or more of the neighboring LTE cells.

[0085] like Figure 6As shown by reference numeral 605, the base station 110 may transmit to the UE 120 a configuration of a resource set for LTE-CRS measurements associated with one or more neighboring LTE cells. The UE 120 may receive the configuration of the resource set for LTE-CRS measurements. For example, the base station 110 may transmit the configuration to the UE 120 in an RRC message. The configuration may identify resources (e.g., a set of REs) for the UE 120 to perform LTE-CRS interference measurements. The RE set may be configured in a pattern that matches the RE pattern configured for transmitting one or more LTE-CRS in one or more neighboring LTE cells.

[0086] In some aspects, a RE set may be associated with an RE pattern configured for a single LTE-CRS in a single adjacent LTE cell. For example, a RE set may be associated with an antenna port having a v shift value (e.g., an antenna port of an adjacent LTE cell). In some aspects, a RE set may be associated with an RE pattern configured for multiple LTE-CRS in a single adjacent LTE cell. For example, a RE set may be associated with multiple antenna ports having a v shift value (e.g., multiple antenna ports of an adjacent LTE cell). In some aspects, a RE set may be associated with an RE pattern configured for LTE-CRS in multiple adjacent LTE cells. For example, a RE set may be associated with one or more antenna elements having multiple v shift values ​​(e.g., one or more antenna elements in multiple adjacent LTE cells). In some aspects, the base station 110 may configure the UE 120 with one or more RE sets for performing LTE-CRS interference measurements. For example, in the case where the base station 110 transmits a configuration of multiple RE sets, each RE set is associated with an RE pattern configured for a corresponding LTE-CRS set in one or more adjacent LTE cells (e.g., a corresponding RE set covering one or more antenna elements having one or more v shift values).

[0087] In some aspects, the base station 110 may configure the UE 120 to measure LTE-CRS interference using CSI-IM-based measurements of a set of REs. For example, the set of REs may be a set of zero-power REs for performing CSI-IM measurements in a pattern associated with LTE-CRS transmissions in one or more neighboring LTE cells (e.g., associated with one or more antenna ports). In this manner, the UE 120 may be configured to measure interference of LTE-CRS transmitted in the set of REs indicated in the configuration. In some aspects, the base station 110 may transmit and the UE 120 may receive a configuration of one or more zero-power RE sets for performing LTE-CRS interference measurements.

[0088] In some aspects, the base station 110 may configure the UE 120 to measure LTE-CRS interference using NZP-CSI-RS based measurements on a set of REs. For example, the set of REs may be a set of NZP-CSI-RS REs in a pattern associated with LTE-CRS transmission in one or more adjacent LTE cells. In this case, the UE 120 may measure the quality of the LTE-CRS transmission in the REs (e.g., as an expected CSI-RS), and the UE 120 may determine the interference measurement based on the measured quality. In the case where the NZP-CSI-RS RE set is configured for LTE-CRS interference measurement, the UE 120 may also be configured with one or more parameters associated with the sequence generation of the LTE-CRS. For example, the configuration may include parameters associated with the sequence generation of the LTE-CRS, such as a cell identifier, slot index, symbol index, bandwidth, and / or starting PRB index associated with the LTE-CRS. In some aspects, the base station 110 may transmit and the UE 120 may receive a configuration of one or more NZP-CSI-RS RE sets for performing LTE-CRS interference measurement.

[0089] In some aspects, base station 110 may configure UE 120 with one or more parameters for UE 120 to use to identify the LTE-CRS rate matching mode. The parameters, which may be included in the same message as the configuration of the RE sets or in a different message, may include one or more higher layer (e.g., Layer 2 (L2) or Layer 3 (L3)) parameters to be used by UE 120 to identify the LTE-CRS rate matching mode. For example, base station 110 may transmit to UE 120 an indication of at least one of a signal-to-interference ratio (SIR) threshold or an SINR threshold to be used by UE 120 to identify the LTE-CRS rate matching mode.

[0090] like Figure 6 As further shown by reference numeral 610, UE 120 may perform LTE-CRS interference measurement on a set of REs. In some aspects, when the set of REs configured for LTE-CRS interference measurement is a set of zero-power REs, UE 120 may perform a respective interference measurement (e.g., a CSI-IM-based measurement) on each RE in the set of REs, and UE 120 may estimate interference power (and / or other measures of interference) for the set of REs based at least in part on the respective interference measurements for the REs. For example, UE 120 may calculate the covariance of interference plus noise for each RE (e.g., based at least in part on the respective SINR measurement), and UE 120 may estimate interference power (and / or other measures of interference) for the set of REs based at least in part on the interference plus noise covariance calculated for each RE.

[0091] In some aspects, when the RE set configured for LTE-CRS interference measurement is the NZP-CSI-RS RE set, the UE 120 may perform a measurement of the quality of the corresponding LTE-CRS transmission for each RE in the RE set, and the UE 120 may estimate the interference power of the RE set based at least in part on the corresponding quality measurement of the RE. For example, the UE 120 may calculate the interference power by performing coherent detection of the LTE-CRS on each RE based at least in part on the cell identifier indicated in the configuration and / or other parameters associated with sequence generation of the LTE-CRS (e.g., slot index, symbol index, bandwidth, and / or starting PRB index).

[0092] In some aspects, the UE 120 may determine (e.g., measure and / or calculate) corresponding interference measurements for one or more LTE-CRS hypotheses associated with a set of REs. Each LTE-CRS hypothesis may be associated with a corresponding LTE-CRS antenna port of a neighboring LTE cell in one or more neighboring LTE cells. For example, each LTE-CRS hypothesis may be a corresponding LTE-CRS associated with an antenna port and a v shift value. The interference measurement determined by the UE 120 for the LTE-CRS hypothesis may be an average interference measurement (e.g., average power, quality, and / or other interference measurements of the measured interference) for the REs associated with the LTE-CRS hypothesis in the set of REs. For example, the REs associated with the LTE-CRS hypothesis may be all REs in the set of REs or a subset of the REs in the set of REs. In some aspects, the corresponding average interference measurement determined by the UE 120 for each LTE-CRS hypothesis may be at least one of an RSSI value, an RSRP value, an RSRQ value, an SINR value, or an SIR value. In some aspects, when UE 120 is configured with CSI-IM based interference measurement (e.g., zero-power REs), UE 120 may determine at least an average RSSI value for each LTE-CRS hypothesis. In some aspects, when UE 120 is configured with NZP-CSI-RS based interference measurement, UE 120 may determine at least an average RSRP value for each LTE-CRS hypothesis.

[0093] like Figure 6As further shown by reference numeral 615, the UE 120 may identify a rate matching pattern based at least in part on LTE-CRS interference measurements performed on a set of REs. For example, the UE 120 may identify a recommended LTE-CRS rate matching pattern to be used by the UE 120 for one or more downlink communications. The UE 120 may identify the LTE-CRS rate matching pattern by determining, for each LTE-CRS of one or more neighboring LTE cells associated with the set of REs (e.g., for each LTE-CRS hypothesis of one or more LTE-CRSs), whether to include rate matching around the LTE-CRS in the LTE-CRS rate matching pattern (e.g., whether to perform rate matching around REs associated with the LTE-CRS). The UE 120 may determine, based at least in part on interference measurements determined for the LTE-CRS (e.g., with respect to the set of REs associated with the LTE-CRS), whether to perform rate matching around the REs associated with the LTE-CRS (e.g., the LTE-CRS hypothesis).

[0094] Using interference measurements of REs associated with LTE-CRS, UE 120 may determine whether to perform rate matching around LTE-CRS based at least in part on a tradeoff between interference mitigation and increased PDSCH / PDCCH overhead associated with rate matching around LTE-CRS REs. In some aspects, UE 120 may determine whether to perform rate matching around REs associated with LTE-CRS based at least in part on a comparison of an SINR value for LTE-CRS (e.g., an average SINR value for REs associated with LTE-CRS) with an SINR threshold. For example, UE 120 may receive an indication of an SINR threshold from base station 110 (e.g., in an RRC configuration). If the SINR value for LTE-CRS meets the threshold, UE 120 may determine to perform rate matching around REs associated with LTE-CRS. If the SINR value does not meet the threshold, UE 120 may determine not to perform rate matching around REs associated with LTE-CRS. Additionally or alternatively, UE 120 may determine whether to perform rate matching around REs associated with LTE-CRS based at least in part on a comparison of an SIR value for LTE-CRS (e.g., an average SINR value for REs associated with LTE-CRS) and a SIR threshold. For example, UE 120 may receive an indication of the SIR threshold from base station 110 (e.g., in an RRC configuration).

[0095] In some aspects, UE 120 may identify an LTE-CRS rate matching mode in which rate matching is performed for all or a subset of LTE-CRS REs in a set of REs. In some aspects, UE 120 may identify an LTE-CRS rate matching mode in which rate matching is not performed for all or a subset of LTE-CRS REs in a set of REs.

[0096] like Figure 6 As further shown by reference numeral 620, UE 120 may estimate CSI based at least in part on the rate matching mode identified by UE 120. UE 120 may estimate CSI resulting from applying the LTE-CRS rate matching mode identified by UE 120. For example, for each LTE-CRS for which UE 120 determines to perform rate matching in the LTE-CRS rate matching mode, UE 120 may calculate CSI under the assumption that the interference measured for the LTE-CRS is removed. In this case, for each LTE-CRS for which rate matching is to be performed according to the LTE-CRS rate matching mode, UE 120 may estimate CSI for the PDSCH without the measured interference associated with the LTE-CRS. For example, the estimated CSI may provide an estimate of the channel quality expected for PDSCH reception without LTE-CRS interference. In some aspects, UE 120 may estimate CSI, including CQI, precoding matrix indicator (PMI), and / or rank indicator (RI), without measured interference for any LTE-CRS REs for which rate matching is performed in an LTE-CRS rate matching pattern identified by UE 120.

[0097] like Figure 6As further shown by reference numeral 625, UE 120 may transmit to base station 110 an indication of an LTE-CRS rate matching mode identified by UE 120 (e.g., a recommended LTE-CRS rate matching mode) and / or CSI estimated based at least in part on the LTE-CRS rate matching mode identified by UE 120. For example, UE 120 may report the LTE-CRS rate matching mode to base station 110. UE 120 may also report CSI estimated in the absence of LTE-CRS interference for LTE-CRS REs for which rate matching is performed in the LTE-CRS rate matching mode. In some aspects, the indication / report of the LTE-CRS rate matching mode (e.g., the recommended LTE-CRS rate matching mode) and the CSI may be multiplexed in the same UCI feedback transmission from UE 120 to base station 110. In some aspects, the indication / report of the LTE-CRS rate matching mode and the CSI may be transmitted in separate UCI transmissions from UE 120 to base station 110. In some aspects, the interference measurement indication transmitted from UE 120 to base station 110 may include an indication / report of the LTE-CRS rate matching pattern identified by UE 120 and / or CSI estimated based at least in part on the LTE-CRS rate matching pattern identified by UE 120.

[0098] like Figure 6As further shown by reference numeral 630, the base station 110 may transmit a rate matching indication to the UE 120, the rate matching indication identifying an LTE-CRS rate matching pattern to be used by the UE 120 for one or more downlink communications. The base station 110 may receive an indication / report of the LTE-CRS rate matching pattern identified by the UE 120 (e.g., a recommended LTE-CRS rate matching), and the base station 110 may determine an LTE-CRS rate matching pattern to be used (e.g., for the PDSCH and / or PDCCH) by the UE 120 based at least in part on the recommended LTE-CRS rate matching pattern received from the UE 120. For example, the base station 110 may determine whether the recommended LTE-CRS rate matching pattern identified by the UE 120 is to be used by the UE 120 based at least in part on CSI received from the UE 120 (e.g., CSI estimated based at least in part on the recommended LTE-CRS rate matching pattern). Base station 110 may then transmit a rate matching indication to UE 120, the rate matching indication identifying an LTE-CRS rate matching mode for UE 120 (e.g., a UE-specific LTE-CRS rate matching mode for UE 120). The UE-specific LTE-CRS rate matching mode indicated by the rate matching indication may be a recommended LTE-CRS rate matching mode identified by UE 120 or an LTE-CRS rate matching mode that is different from the recommended LTE-CRS rate matching mode. In some aspects, the rate matching indication may indicate whether the recommended LTE-CRS rate matching mode is selected for UE 120.

[0099] The LTE-CRS rate matching mode indicated by the rate matching indication may be a rate matching mode for performing rate matching around LTE-CRS REs when receiving downlink communications. In some aspects, the LTE-CRS rate matching mode to be used by UE 120 may include an LTE-CRS rate matching mode for PDSCH communication and / or an LTE-CRS rate matching / puncturing mode for PDCCH communication. In some aspects, base station 110 may transmit a rate matching indication (e.g., including an indication of an LTE-CRS rate matching mode for PDSCH and / or an indication of an LTE-CRS rate matching / puncturing mode for PDCCH) to UE 120 in an RRC message, MAC-CE, or DCI. For example, base station 110 may indicate an LTE-CRS rate matching pattern (e.g., including an LTE-CRS rate matching pattern for PDSCH and / or an LTE-CRS rate matching / puncturing pattern for PDCCH) for UE 120 via semi-static configuration (e.g., in an RRC message) or via dynamic indication (e.g., in a MAC-CE or DCI).

[0100] In some aspects, base station 110 may transmit one or more downlink communications to UE 120, and UE 120 may perform rate matching on the one or more downlink communications according to an LTE-CRS rate matching pattern identified by a rate matching indication received from base station 110. For example, UE 120 may perform rate matching on one or more PDSCH communications according to an LTE-CRS rate matching pattern for the PDSCH identified by the rate matching indication received from base station 110. Additionally or alternatively, UE 120 may perform rate matching (and / or puncturing) on ​​the one or more PDCCH communications according to an LTE-CRS rate matching / puncturing pattern for the PDCCH identified by the rate matching indication received from base station 110.

[0101] As described herein, base station 110 may transmit a configuration of a set of REs for LTE-CRS measurements associated with one or more neighboring LTE cells. UE 120 may perform LTE interference measurements on the set of REs, and UE 120 may identify a recommended LTE-CRS rate matching pattern based at least in part on the LTE-CRS measurements. UE 120 may estimate CSI based at least in part on the recommended LTE-CRS rate matching pattern, and UE 120 may transmit an indication of the recommended LTE-CRS rate matching pattern and / or the CSI to base station 110. Base station 110 may transmit a rate matching indication to UE 120 that identifies an LTE-CRS rate matching pattern to be used by UE 120 (e.g., for receiving PDSCH and / or PDCCH communications). Thus, UE 120 may perform rate matching using a UE-specific LTE-CRS rate matching pattern determined by base station 110 based at least in part on the LTE-CRS interference measured by UE 120. Thus, UE 120 may perform rate matching around LTE-CRS transmissions that cause interference to downlink communications to UE 120 (e.g., resulting in reduced interference and increased reliability of downlink communications) without performing unnecessary rate matching around LTE-CRS transmissions that do not cause significant interference to downlink communications to UE 120 (e.g., resulting in reduced overhead and latency for downlink communications compared to a cell-common configuration applied to all UEs in the NR cell).

[0102] As indicated above, Figure 6 Provided as an example. Other examples can be found in the Figure 6 Different than described.

[0103] Figure 7is a diagram illustrating an example process 700, performed, for example, by a UE, in accordance with the present disclosure. Example process 700 is an example of a UE (eg, UE 120) performing operations associated with LTE-CRS interference handling.

[0104] like Figure 7 As shown, in some aspects, process 700 may include receiving from a base station a configuration of a set of REs for LTE-CRS interference measurements associated with one or more neighboring LTE cells (block 710). Figure 9 The communications manager 140 and / or receiving component 902 depicted in FIG. 1 may receive, from a base station, a configuration of a set of REs for LTE-CRS interference measurements associated with one or more neighboring LTE cells, as described above.

[0105] like Figure 7 As further shown, in some aspects, process 700 may include performing LTE-CRS interference measurements on a set of REs (block 720). For example, a UE (e.g., using Figure 9 The communications manager 140 and / or measurement component 908 depicted in FIG. 14A may perform LTE-CRS interference measurements on a set of REs, as described above.

[0106] like Figure 7 As further shown, in some aspects, process 700 may include transmitting an interference measurement indication to a base station based at least in part on the LTE-CRS interference measurement (block 730). Figure 9 The communications manager 140 and / or transmitting component 904 depicted in FIG. 1 may transmit an interference measurement indication to a base station based at least in part on the LTE-CRS interference measurement, as described above.

[0107] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0108] In a first aspect, process 700 includes receiving a rate matching indication from a base station, the rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications.

[0109] In a second aspect, alone or in combination with the first aspect, a rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications is included in at least one of an RRC message, a DCI, or a MAC-CE.

[0110] In a third aspect, alone or in combination with one or more of the first and second aspects, a set of REs is associated with one or more LTE-CRS antenna ports of a neighboring LTE cell.

[0111] In a fourth aspect, alone or in combination with one or more of the first to third aspects, a set of REs is associated with one or more LTE-CRS antenna ports of a plurality of neighboring LTE cells.

[0112] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the RE set is a zero-power RE set for channel state information interference measurement in a pattern associated with LTE-CRS transmission in one or more neighboring LTE cells.

[0113] In a sixth aspect, either alone or in combination with one or more of aspects 1 to 5, performing LTE-CRS interference measurement on a set of REs includes performing corresponding interference measurement on each RE in the set of REs, and estimating the interference power of the set of REs based at least in part on the corresponding interference measurement on each RE in the set of REs.

[0114] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the RE set is a non-zero power channel state information reference signal RE set in a pattern associated with LTE-CRS transmission in one or more neighboring LTE cells.

[0115] In an eighth aspect, performing LTE-CRS interference measurement on a set of REs, alone or in combination with one or more of aspects one to seven, comprises performing a measurement of the quality of a corresponding LTE-CRS transmission on each RE in the set of REs, and estimating the interference power of the set of REs based at least in part on the measurement of the quality of the corresponding LTE-CRS transmission of each RE in the set of REs.

[0116] In a ninth aspect, alone or in combination with one or more aspects from the first to the eighth aspects, transmitting an interference measurement indication based at least in part on the LTE-CRS interference measurement includes transmitting a report to a base station indicating corresponding interference measurements for one or more LTE-CRS hypotheses, and each of the one or more LTE-CRS hypotheses is associated with a corresponding LTE-CRS antenna port of a neighboring LTE cell in one or more neighboring LTE cells.

[0117] In a tenth aspect, alone or in combination with one or more aspects from the first to the ninth aspects, the corresponding interference measurement for each LTE-CRS hypothesis in one or more LTE-CRS hypotheses is an average interference measurement of the LTE-CRS hypothesis with respect to the RE set.

[0118] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the average interference measurement is at least one of an RSSI value, an RSRP value, an RSRQ value, or an SINR value.

[0119] In the twelfth aspect, alone or in combination with one or more aspects of the first to eleventh aspects, transmitting the interference measurement indication based at least in part on the LTE-CRS interference measurement includes transmitting an indication of the LTE-CRS rate matching mode to the base station based at least in part on the LTE-CRS interference measurement.

[0120] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, process 700 comprises identifying an LTE-CRS rate matching pattern based at least in part on LTE-CRS interference measurements.

[0121] In a fourteenth aspect, alone or in combination with one or more of aspects one to thirteen, identifying the LTE-CRS rate matching pattern includes, for each of one or more LTE-CRSs of one or more neighboring LTE cells, determining whether to include rate matching around the LTE-CRS in the LTE-CRS rate matching pattern based at least in part on an LTE-CRS interference measurement and a signal-to-interference ratio threshold or a signal-to-interference-plus-noise ratio threshold.

[0122] In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, process 700 includes receiving an indication of a signal-to-interference ratio threshold or a signal-to-interference-plus-noise ratio threshold from a base station.

[0123] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, process 700 includes transmitting estimated channel state information to a base station based at least in part on an LTE-CRS rate matching pattern.

[0124] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the estimated channel state information includes at least one of CQI, PMI, or RI.

[0125] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, in the transmission of uplink control information, an indication of a recommended LTE-CRS rate matching mode is multiplexed with estimated channel state information.

[0126] although Figure 7 Example blocks of process 700 are shown, but in some aspects, process 700 may include Figure 7The blocks depicted in the process 700 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 700. Additionally or alternatively, two or more blocks of the blocks of the process 700 may be executed in parallel.

[0127] Figure 8 is a diagram illustrating an example process 800, performed, for example, by a base station, in accordance with the present disclosure. Example process 800 is an example of a base station (eg, base station 110) performing operations associated with LTE-CRS interference handling.

[0128] like Figure 8 As shown, in some aspects, process 800 may include transmitting to a UE a configuration of a set of REs for LTE-CRS interference measurements associated with one or more neighboring LTE cells (block 810). Figure 10 The communications manager 150 and / or transmitting component 1004 depicted in FIG. 1004 may transmit to the UE a configuration of a set of REs for LTE-CRS interference measurements associated with one or more neighboring LTE cells, as described above.

[0129] like Figure 8 As further shown, in some aspects, process 800 may include receiving an interference measurement indication associated with an LTE-CRS interference measurement in a set of REs from a UE (block 820). Figure 10 The communications manager 150 and / or receiving component 1002 depicted in FIG. 100 may receive an interference measurement indication associated with an LTE-CRS interference measurement in a set of REs from a UE, as described above.

[0130] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0131] In a first aspect, process 800 includes transmitting a rate matching indication to a UE based at least in part on an interference measurement indication associated with an LTE-CRS interference measurement in a set of REs, the rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications.

[0132] In a second aspect, alone or in combination with the first aspect, a rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications is included in at least one of an RRC message, a DCI, or a MAC-CE.

[0133] In a third aspect, alone or in combination with one or more of the first and second aspects, a set of REs is associated with one or more LTE-CRS antenna ports of a neighboring LTE cell.

[0134] In a fourth aspect, alone or in combination with one or more of the first to third aspects, a set of REs is associated with one or more LTE-CRS antenna ports of a plurality of neighboring LTE cells.

[0135] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the RE set is a zero-power RE set for channel state information interference measurement in a pattern associated with LTE-CRS transmission in one or more neighboring LTE cells.

[0136] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the RE set is a non-zero power channel state information reference signal RE set in a pattern associated with LTE-CRS transmission in one or more neighboring LTE cells.

[0137] In a seventh aspect, alone or in combination with one or more of aspects 1 to 6, receiving an interference measurement indication associated with an LTE-CRS interference measurement in a set of REs includes receiving a report from the UE indicating corresponding interference measurements for one or more LTE-CRS hypotheses, and each of the one or more LTE-CRS hypotheses is associated with a corresponding LTE-CRS antenna port of a neighboring LTE cell in one or more neighboring LTE cells.

[0138] In an eighth aspect, alone or in combination with one or more aspects from the first to seventh aspects, the corresponding interference measurement for each LTE-CRS hypothesis in one or more LTE-CRS hypotheses is an average interference measurement of the LTE-CRS hypothesis with respect to the RE set.

[0139] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the average interference measurement is at least one of an RSSI value, an RSRP value, an RSRQ value, or an SINR value.

[0140] In a tenth aspect, alone or in combination with one or more of aspects one to nine, receiving an interference measurement indication associated with an LTE-CRS interference measurement in a set of REs includes receiving an indication of an LTE-CRS rate matching mode from the UE based at least in part on the LTE-CRS interference measurement.

[0141] In an eleventh aspect, alone or in combination with one or more of aspects one to ten, process 800 includes transmitting to the UE an indication of a threshold associated with identifying an LTE-CRS rate matching mode, and the threshold is a signal-to-interference ratio threshold or a signal-to-interference-plus-noise ratio threshold.

[0142] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, process 800 includes receiving estimated channel state information from a UE based at least in part on an LTE-CRS rate matching pattern.

[0143] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the estimated channel state information includes at least one of CQI, PMI, or RI.

[0144] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, in the transmission of uplink control information from the UE, an indication of a recommended LTE-CRS rate matching mode is multiplexed with estimated channel state information.

[0145] although Figure 8 Example blocks of process 800 are shown, but in some aspects, process 800 may include Figure 8 The blocks depicted in the process 800 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in the process 800. Additionally or alternatively, two or more blocks of the blocks of the process 800 may be executed in parallel.

[0146] Figure 9 is a diagram of an example apparatus 900 for wireless communication. Apparatus 900 may be a UE, or a UE may include apparatus 900. In some aspects, apparatus 900 includes a receiving component 902 and a transmitting component 904 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 900 may communicate with another apparatus 906 (such as a UE, a base station, or another wireless communication device) using receiving component 902 and transmitting component 904. As further shown, apparatus 900 may include a communication manager 140. Communication manager 140 may include one or more of a measurement component 908 and / or an identification component 910, among others.

[0147] In some aspects, the apparatus 900 may be configured to perform Figures 4 to 6 Additionally or alternatively, the apparatus 900 may be configured to perform one or more of the processes described herein (such as Figure 7 In some aspects, the apparatus 900 and / or Figure 9 One or more of the components shown may include a combination of Figure 2 Additionally or alternatively, one or more components of the UE described. Figure 9 One or more of the components shown may be combined Figure 2Additionally or alternatively, one or more components in the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0148] Receive component 902 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from apparatus 906. Receive component 902 may provide the received communications to one or more other components of apparatus 900. In some aspects, receive component 902 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding) on ​​the received communications and may provide the processed signals to one or more other components of apparatus 900. In some aspects, receive component 902 may include in conjunction with Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described UE.

[0149] Transmission component 904 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to apparatus 906. In some aspects, one or more other components of apparatus 900 may generate communications and may provide the generated communications to transmission component 904 for transmission to apparatus 906. In some aspects, transmission component 904 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding) on ​​the generated communications and may transmit the processed signals to apparatus 906. In some aspects, transmission component 904 may include a combination of Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described UE. In some aspects, transmitting component 904 can be co-located with receiving component 902 in a transceiver.

[0150] Receiving component 902 can receive, from a base station, a configuration of a set of REs for LTE-CRS interference measurements associated with one or more neighboring LTE cells. Measuring component 908 can perform LTE-CRS interference measurements on the set of REs. Transmitting component 904 can transmit an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurements.

[0151] Receiving component 902 can receive a rate matching indication from a base station, the rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications.

[0152] Identifying component 910 can identify an LTE-CRS rate matching pattern based at least in part on LTE-CRS interference measurements.

[0153] Receiving component 902 can receive an indication of a signal-to-interference ratio threshold or a signal-to-interference-plus-noise ratio threshold from a base station.

[0154] Transmitting component 904 can transmit estimated channel state information to a base station based at least in part on the LTE-CRS rate matching pattern.

[0155] Figure 9 The number and arrangement of components shown are provided as examples. Figure 9 There may be additional components, fewer components, different components, or components arranged differently than those shown. Figure 9 Two or more components shown may be implemented in a single component, or Figure 9 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Figure 9 The illustrated set of components (one or more) may perform the operations described as being performed by Figure 9 Another group of components is shown performing one or more functions.

[0156] Figure 10 1 is a diagram of an example apparatus 1000 for wireless communication. Apparatus 1000 may be a base station, or a base station may include apparatus 1000. In some aspects, apparatus 1000 includes a receiving component 1002 and a transmitting component 1004 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1000 may communicate with another apparatus 1006 (such as a UE, a base station, or another wireless communication device) using receiving component 1002 and transmitting component 1004. As further shown, apparatus 1000 may include a communication manager 150. Communication manager 150 may include, among other things, a determining component 1008.

[0157] In some aspects, the apparatus 1000 may be configured to perform Figures 4 to 6 Additionally or alternatively, the apparatus 1000 may be configured to perform one or more of the processes described herein (such as Figure 8 In some aspects, the apparatus 1000 and / or Figure 10 One or more of the components shown may include a combination of Figure 2 Additionally or alternatively, Figure 10 One or more of the components shown may be combined Figure 2Additionally or alternatively, one or more components in the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0158] Receive component 1002 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from apparatus 1006. Receive component 1002 may provide the received communications to one or more other components of apparatus 1000. In some aspects, receive component 1002 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding) on ​​the received communications and may provide the processed signals to one or more other components of apparatus 1000. In some aspects, receive component 1002 may include in conjunction with Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described base stations.

[0159] The transmission component 1004 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1006. In some aspects, one or more other components of the apparatus 1000 may generate communications and may provide the generated communications to the transmission component 1004 for transmission to the apparatus 1006. In some aspects, the transmission component 1004 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding) on ​​the generated communications and may transmit the processed signals to the apparatus 1006. In some aspects, the transmission component 1004 may include a combination of Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described base stations. In some aspects, the transmitting component 1004 can be co-located with the receiving component 1002 in a transceiver.

[0160] Transmitting component 1004 can transmit to a UE a configuration of a set of REs for LTE-CRS interference measurement associated with one or more neighboring LTE cells.Receiving component 1002 can receive from a UE an interference measurement indication associated with LTE-CRS interference measurement in the set of REs.

[0161] Transmitting component 1004 may transmit a rate matching indication to the UE based at least in part on an interference measurement indication associated with an LTE-CRS interference measurement in a set of REs, the rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications.

[0162] Determining component 1008 can determine an LTE-CRS rate matching pattern for one or more downlink communications based at least in part on the interference measurement indication.

[0163] Transmitting component 1004 can transmit to the UE an indication of a threshold associated with identifying an LTE-CRS rate matching pattern, wherein the threshold is a signal-to-interference ratio threshold or a signal-to-interference-plus-noise ratio threshold.

[0164] Receiving component 1002 can receive estimated channel state information from a UE based at least in part on an LTE-CRS rate matching pattern.

[0165] Figure 10 The number and arrangement of components shown are provided as examples. Figure 10 There may be additional components, fewer components, different components, or components arranged differently than those shown. Figure 10 Two or more components shown may be implemented in a single component, or Figure 10 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Figure 10 The illustrated set of components (one or more) may perform the operations described as being performed by Figure 10 Another group of components is shown performing one or more functions.

[0166] The following provides an overview of some aspects of the disclosure:

[0167] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving a configuration of a set of resource elements for LTE cell-specific reference signal (LTE-CRS) interference measurement associated with one or more adjacent long term evolution (LTE) cells from a base station; performing the LTE-CRS interference measurement on the set of resource elements; and transmitting an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurement.

[0168] Aspect 2: The method according to aspect 1 further includes: receiving a rate matching indication from the base station, the rate matching indication identifying an LTE-CRS rate matching mode for one or more downlink communications.

[0169] Aspect 3: A method according to Aspect 2, wherein the rate matching indication identifying the LTE-CRS rate matching mode for the one or more downlink communications is included in at least one of a radio resource control (RRC) message, downlink control information (DCI) or a medium access control (MAC) control element (MAC-CE).

[0170] Aspect 4: The method according to any one of aspects 1 to 3, wherein the set of resource elements is associated with one or more LTE-CRS antenna ports of a neighboring LTE cell.

[0171] Aspect 5: The method according to any one of aspects 1 to 3, wherein the set of resource elements is associated with one or more LTE-CRS antenna ports of multiple neighboring LTE cells.

[0172] Aspect 6: The method according to any one of aspects 1 to 5, wherein the set of resource elements is a set of zero-power resource elements used for channel state information interference measurement in a pattern associated with LTE-CRS transmission in the one or more neighboring LTE cells.

[0173] Aspect 7: A method according to Aspect 6, wherein performing the LTE-CRS interference measurement on the resource element set includes: performing corresponding interference measurement on each resource element in the resource element set; and estimating the interference power of the resource element set based at least in part on the corresponding interference measurement of each resource element in the resource element set.

[0174] Aspect 8: The method according to any one of aspects 1 to 5, wherein the set of resource elements is a set of non-zero power channel state information reference signal resource elements in a pattern associated with LTE-CRS transmission in the one or more neighboring LTE cells.

[0175] Aspect 9: A method according to Aspect 8, wherein performing the LTE-CRS interference measurement on the resource element set includes: performing a measurement of the quality of the corresponding LTE-CRS transmission for each resource element in the resource element set; and estimating the interference power of the resource element set based at least in part on the measurement of the quality of the corresponding LTE-CRS transmission for each resource element in the resource element set.

[0176] Aspect 10: A method according to any one of Aspects 1 to 9, wherein transmitting the interference measurement indication based at least in part on the LTE-CRS interference measurement includes: transmitting a report indicating corresponding interference measurements for one or more LTE-CRS assumptions to the base station, wherein each of the one or more LTE-CRS assumptions is associated with a corresponding LTE-CRS antenna port of a neighboring LTE cell in the one or more neighboring LTE cells.

[0177] Aspect 11: The method according to aspect 10, wherein the corresponding interference measurement for each LTE-CRS hypothesis of one or more LTE-CRS hypotheses is an average interference measurement of the LTE-CRS hypothesis with respect to the set of resource elements.

[0178] Aspect 12: The method according to aspect 11, wherein the average interference measurement is at least one of a received signal strength indicator (RSSI) value, a reference signal received power (RSRP) value, a reference signal received quality (RSRQ) value, or a signal to interference plus noise ratio (SINR) value.

[0179] Aspect 13: A method according to any one of Aspects 1 to 9, wherein transmitting the interference measurement indication based at least in part on the LTE-CRS interference measurement includes: transmitting an indication of the LTE-CRS rate matching mode to the base station based at least in part on the LTE-CRS interference measurement.

[0180] Aspect 14: The method of aspect 13, further comprising: identifying the LTE-CRS rate matching pattern based at least in part on the LTE-CRS interference measurement.

[0181] Aspect 15: A method according to Aspect 14, wherein identifying the LTE-CRS rate matching pattern includes: for each LTE-CRS in the one or more LTE-CRSs of the one or more adjacent LTE cells, determining whether to include rate matching around the LTE-CRS in the LTE-CRS rate matching pattern based at least in part on the LTE-CRS interference measurement and the signal-to-interference ratio threshold or the signal-to-interference-plus-noise ratio threshold.

[0182] Aspect 16: The method according to aspect 15 further comprises: receiving an indication of the signal-to-interference ratio threshold or the signal-to-interference-plus-noise ratio threshold from the base station.

[0183] Aspect 17: The method according to any one of aspects 13 to 16 further includes: transmitting estimated channel state information to the base station based at least in part on the LTE-CRS rate matching pattern.

[0184] Aspect 18: The method according to aspect 17, wherein the estimated channel state information comprises at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), or a rank indicator (RI).

[0185] Aspect 19: The method according to any one of aspects 17 to 18, wherein in the transmission of uplink control information, the indication of the LTE-CRS rate matching mode is multiplexed with the estimated channel state information.

[0186] Aspect 20: A method of wireless communication performed by a base station, comprising: transmitting to a user equipment (UE) a configuration of a set of resource elements for LTE cell-specific reference signal (LTE-CRS) interference measurement associated with one or more neighboring long term evolution (LTE) cells; and receiving from the UE an interference measurement indication associated with the LTE-CRS interference measurement in the set of resource elements.

[0187] Aspect 21: The method according to Aspect 20 further includes: transmitting a rate matching indication to the UE based at least in part on the interference measurement indication associated with the LTE-CRS interference measurement in the resource element set, wherein the rate matching indication identifies an LTE-CRS rate matching mode for one or more downlink communications.

[0188] Aspect 22: A method according to Aspect 21, wherein the rate matching indication identifying the LTE-CRS rate matching mode for the one or more downlink communications is included in at least one of a radio resource control (RRC) message, downlink control information (DCI), or a medium access control (MAC) control element (MAC-CE).

[0189] Aspect 23: The method according to any one of aspects 20 to 22, wherein the set of resource elements is associated with one or more LTE-CRS antenna ports of a neighboring LTE cell.

[0190] Aspect 24: The method according to any one of aspects 20 to 22, wherein the set of resource elements is associated with one or more LTE-CRS antenna ports of multiple neighboring LTE cells.

[0191] Aspect 25: A method according to any one of aspects 20 to 24, wherein the set of resource elements is a set of zero-power resource elements for channel state information interference measurement in a pattern associated with LTE-CRS transmission in the one or more neighboring LTE cells.

[0192] Aspect 26: A method according to any one of aspects 20 to 24, wherein the set of resource elements is a set of non-zero power channel state information reference signal resource elements in a pattern associated with LTE-CRS transmission in the one or more neighboring LTE cells.

[0193] Aspect 27: A method according to any one of Aspects 20 to 26, wherein receiving the interference measurement indication associated with the LTE-CRS interference measurement in the resource element set includes: receiving a report from the UE indicating corresponding interference measurements for one or more LTE-CRS assumptions, wherein each of the one or more LTE-CRS assumptions is associated with a corresponding LTE-CRS antenna port of a neighboring LTE cell in the one or more neighboring LTE cells.

[0194] Aspect 28: The method of aspect 27, wherein the corresponding interference measurement for each of the one or more LTE-CRS hypotheses is an average interference measurement of the LTE-CRS hypothesis with respect to the set of resource elements.

[0195] Aspect 29: A method according to aspect 28, wherein the average interference measurement is at least one of a received signal strength indicator (RSSI) value, a reference signal received power (RSRP) value, a reference signal received quality (RSRQ) value, or a signal to interference plus noise ratio (SINR) value.

[0196] Aspect 30: A method according to any one of Aspects 20 to 26, wherein receiving the interference measurement indication associated with the LTE-CRS interference measurement in the resource element set includes: receiving an indication of an LTE-CRS rate matching mode from the UE based at least in part on the LTE-CRS interference measurement.

[0197] Aspect 31: The method according to aspect 30 further includes: transmitting an indication of a threshold associated with identifying the LTE-CRS rate matching mode to the UE, wherein the threshold is a signal-to-interference ratio threshold or a signal-to-interference-plus-noise ratio threshold.

[0198] Aspect 32: The method according to any one of aspects 30 to 31 further includes: receiving estimated channel state information from the UE based at least in part on the LTE-CRS rate matching pattern.

[0199] Aspect 33: The method according to aspect 32, wherein the estimated channel state information comprises at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), or a rank indicator (RI).

[0200] Aspect 34: The method according to any one of aspects 32 to 33, wherein the indication of the LTE-CRS rate matching mode is multiplexed with the estimated channel state information in the transmission of uplink control information from the UE.

[0201] Aspect 35: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods described in aspects 1 to 19.

[0202] Aspect 36: An apparatus for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 1 to 19.

[0203] Aspect 37: An apparatus for wireless communication, comprising at least one means for performing the method according to one or more of aspects 1 to 19.

[0204] Aspect 38: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 19.

[0205] Aspect 39: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more of the methods described in aspects 1 to 19.

[0206] Aspect 40: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods described in aspects 20 to 34.

[0207] Aspect 41: An apparatus for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 20 to 34.

[0208] Aspect 42: An apparatus for wireless communication, comprising at least one means for performing the method according to one or more of aspects 20 to 34.

[0209] Aspect 43: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 20 to 34.

[0210] Aspect 44: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more of the methods described in aspects 20 to 34.

[0211] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of these aspects.

[0212] As used herein, the term "component" is intended to be broadly interpreted as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other names, "software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes and / or functions and other examples. As used herein, a "processor" is implemented in a combination of hardware and / or hardware and software. It will be apparent that the system or method described herein can be implemented by a combination of different forms of hardware and / or hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Therefore, the operation and behavior of the system and / or method are not described herein with reference to specific software code, because it will be understood by those skilled in the art that software and hardware can be designed to implement the system and / or method at least in part based on the description herein.

[0213] As used herein, "satisfying a threshold" may mean a value is greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0214] Although specific combinations of features are set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined in a manner not specifically listed in the claims and / or not disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. As used herein, a phrase referring to "at least one of" a list of items refers to any combination of these items (which includes a single member). As an example, "at least one of a, b, or c" is intended to encompass a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination of multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other arrangement of a, b, and c).

[0215] Any element, action or instruction used herein should not be interpreted as key or necessary, unless clearly stated so. In addition, as used herein, the articles "one" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more items connected with the article "the" mentioned, and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items and can be used interchangeably with "one or more". If only want to refer to an item, the phrase "only one" or similar terms will be used. Moreover, as used herein, the terms "have", "have", "have" etc. are intended to be open terms, which do not limit the elements they modify (for example, "an element with" A can also have B). In addition, the phrase "based on" is intended to represent "at least partially based on", unless explicitly stated otherwise. Furthermore, as used herein, the term "or" when used in a series is intended to be open-ended and can be used interchangeably with "and / or" unless expressly stated otherwise (e.g., if used in conjunction with "either" or "only one of").

Claims

1. A user equipment (UE) for New Radio (NR) wireless communication, comprising: Memory; and one or more processors coupled to the memory and configured to: receiving, from a base station, a configuration of a set of resource elements for LTE cell-specific reference signals (LTE-CRS) interference measurement associated with one or more neighboring Long Term Evolution (LTE) cells; performing the LTE-CRS interference measurement on the set of resource elements; and transmitting an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurement, the interference measurement indication comprising: indicating a report of respective interference measurements for one or more LTE-CRS hypotheses, wherein each of the one or more LTE-CRS hypotheses is associated with a respective LTE-CRS antenna port of a neighboring LTE cell of the one or more neighboring LTE cells, The interference measurement indication further includes an indication of an LTE-CRS rate matching mode, and the one or more processors are further configured to: The LTE-CRS rate matching pattern is identified based at least in part on the LTE-CRS interference measurement.

2. The UE of claim 1 , wherein the one or more processors are further configured to: A rate matching indication is received from the base station, the rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications.

3. The UE of claim 2 , wherein the rate matching indication identifying the LTE-CRS rate matching mode for the one or more downlink communications is included in at least one of a radio resource control (RRC) message, downlink control information (DCI), or a medium access control (MAC) control element (MAC-CE). 4 . The UE of claim 1 , wherein the set of resource elements is associated with one or more LTE-CRS antenna ports of a neighboring LTE cell. 5 . The UE of claim 1 , wherein the set of resource elements is associated with one or more LTE-CRS antenna ports of a plurality of neighboring LTE cells. 6 . The UE of claim 1 , wherein the set of resource elements is a set of zero-power resource elements used for channel state information interference measurement in a pattern associated with LTE-CRS transmission in the one or more neighboring LTE cells.

7. The UE of claim 6, wherein to perform the LTE-CRS interference measurement on the set of resource elements, the one or more processors are configured to: performing corresponding interference measurement on each resource element in the set of resource elements; and Interference power for the set of resource elements is estimated based at least in part on the respective interference measurement for each resource element in the set of resource elements.

8. The UE of claim 1, wherein the set of resource elements is a set of non-zero power channel state information reference signal resource elements in a pattern associated with LTE-CRS transmission in the one or more neighboring LTE cells.

9. The UE of claim 8, wherein to perform the LTE-CRS interference measurement on the set of resource elements, the one or more processors are configured to: performing, for each resource element in the set of resource elements, a measurement of the quality of a corresponding LTE-CRS transmission; and Interference power for the set of resource elements is estimated based at least in part on the measurement of the quality of the corresponding LTE-CRS transmission for each resource element in the set of resource elements.

10. The UE of claim 1, wherein the corresponding interference measurement for each of the one or more LTE-CRS hypotheses is an average interference measurement of the LTE-CRS hypothesis with respect to the set of resource elements.

11. The UE of claim 10, wherein the average interference measurement is at least one of a received signal strength indicator (RSSI) value, a reference signal received power (RSRP) value, a reference signal received quality (RSRQ) value, or a signal to interference plus noise ratio (SINR) value.

12. The UE of claim 1 , wherein to identify the LTE-CRS rate matching pattern, the one or more processors are configured to: For each of the one or more LTE-CRSs of the one or more neighboring LTE cells, determining whether to include rate matching around the LTE-CRS in the LTE-CRS rate matching pattern based at least in part on the LTE-CRS interference measurement and a signal-to-interference ratio threshold or a signal-to-interference-plus-noise ratio threshold.

13. The UE of claim 12, wherein the one or more processors are further configured to: An indication of the signal-to-interference ratio threshold or the signal-to-interference-plus-noise ratio threshold is received from the base station.

14. The UE of claim 1 , wherein the one or more processors are further configured to: Estimated channel state information is transmitted to the base station based at least in part on the LTE-CRS rate matching pattern. 15 . The UE according to claim 14 , wherein the estimated channel state information comprises at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), or a rank indicator (RI). 16 . The UE according to claim 14 , wherein the indication of the LTE-CRS rate matching mode is multiplexed with the estimated channel state information in transmission of uplink control information.

17. A base station for wireless communication, comprising: Memory; and one or more processors coupled to the memory and configured to: Transmitting to a New Radio (NR) user equipment (UE) a configuration of a set of resource elements for LTE Cell-Specific Reference Signal (LTE-CRS) interference measurement associated with one or more neighboring Long Term Evolution (LTE) cells; as well as Receiving, from the UE, an interference measurement indication associated with the LTE-CRS interference measurement in the set of resource elements, the interference measurement indication comprising: indicating a report of respective interference measurements for one or more LTE-CRS hypotheses, wherein each of the one or more LTE-CRS hypotheses is associated with a respective LTE-CRS antenna port of a neighboring LTE cell of the one or more neighboring LTE cells, The interference measurement indication further includes an indication of an LTE-CRS rate matching mode, where the LTE-CRS rate matching mode is identified by the UE at least in part based on the LTE-CRS interference measurement.

18. The base station of claim 17, wherein the one or more processors are further configured to: A rate matching indication is transmitted to the UE based at least in part on the interference measurement indication associated with the LTE-CRS interference measurement in the set of resource elements, the rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications.

19. The base station of claim 17, wherein the one or more processors are further configured to: Estimated channel state information is received from the UE based at least in part on the LTE-CRS rate matching pattern.

20. A method of wireless communication performed by a user equipment (UE) of New Radio (NR), comprising: receiving, from a base station, a configuration of a set of resource elements for LTE cell-specific reference signals (LTE-CRS) interference measurement associated with one or more neighboring Long Term Evolution (LTE) cells; performing the LTE-CRS interference measurement on the set of resource elements; and transmitting an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurement, the interference measurement indication comprising: indicating a report of respective interference measurements for one or more LTE-CRS hypotheses, wherein each of the one or more LTE-CRS hypotheses is associated with a respective LTE-CRS antenna port of a neighboring LTE cell of the one or more neighboring LTE cells, The interference measurement indication further includes an indication of an LTE-CRS rate matching mode, and the method further includes: The LTE-CRS rate matching pattern is identified based at least in part on the LTE-CRS interference measurement.

21. The method according to claim 20, further comprising: A rate matching indication is received from the base station, the rate matching indication identifying an LTE-CRS rate matching pattern for one or more downlink communications.

22. The method according to claim 20, further comprising: Estimated channel state information is transmitted to the base station based at least in part on the LTE-CRS rate matching pattern.

23. A method of wireless communication performed by a base station, comprising: Transmitting to a New Radio (NR) user equipment (UE) a configuration of a set of resource elements for LTE Cell-Specific Reference Signal (LTE-CRS) interference measurement associated with one or more neighboring Long Term Evolution (LTE) cells; as well as Receiving, from the UE, an interference measurement indication associated with the LTE-CRS interference measurement in the set of resource elements, the interference measurement indication comprising: indicating a report of corresponding interference measurements for one or more LTE-CRS hypotheses, wherein each of the one or more LTE-CRS hypotheses is associated with a corresponding LTE-CRS antenna port of a neighboring LTE cell of the one or more neighboring LTE cells, The interference measurement indication further includes an indication of an LTE-CRS rate matching mode, where the LTE-CRS rate matching mode is identified by the UE at least in part based on the LTE-CRS interference measurement.

24. A user equipment (UE) for New Radio (NR) wireless communication, comprising: means for receiving, from a base station, a configuration of a set of resource elements for LTE Cell-Specific Reference Signal (LTE-CRS) interference measurement associated with one or more neighboring Long Term Evolution (LTE) cells; means for performing the LTE-CRS interference measurement on the set of resource elements; as well as means for transmitting an interference measurement indication to the base station based at least in part on the LTE-CRS interference measurement, the interference measurement indication comprising: indicating a report of respective interference measurements for one or more LTE-CRS hypotheses, wherein each of the one or more LTE-CRS hypotheses is associated with a respective LTE-CRS antenna port of a neighboring LTE cell of the one or more neighboring LTE cells, The interference measurement indication further includes an indication of an LTE-CRS rate matching mode, and the UE further includes: Means for identifying the LTE-CRS rate matching pattern based at least in part on the LTE-CRS interference measurement.

25. A base station for wireless communication, comprising: means for transmitting to a New Radio (NR) user equipment (UE) a configuration of a set of resource elements for LTE Cell-Specific Reference Signal (LTE-CRS) interference measurement associated with one or more neighboring Long Term Evolution (LTE) cells; as well as means for receiving, from the UE, an interference measurement indication associated with the LTE-CRS interference measurement in the set of resource elements, the interference measurement indication comprising: indicating a report of corresponding interference measurements for one or more LTE-CRS hypotheses, wherein each of the one or more LTE-CRS hypotheses is associated with a corresponding LTE-CRS antenna port of a neighboring LTE cell of the one or more neighboring LTE cells, The interference measurement indication further includes an indication of an LTE-CRS rate matching mode, where the LTE-CRS rate matching mode is identified by the UE at least in part based on the LTE-CRS interference measurement.

26. A non-transitory computer-readable medium having stored thereon one or more instructions executable by one or more processors to implement the method of any one of claims 20 to 22.

27. A non-transitory computer-readable medium having one or more instructions stored thereon, the one or more instructions being executable by one or more processors to implement the method of claim 23.

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