Techniques and apparatus for nesting a New Radio system and a Long-Term Evolution system

Abstract

Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a UE may measure a first reference signal associated with a frequency band of a Long Term Evolution (LTE) system and a second reference signal associated with a frequency band of a New Radio (NR) system. The frequency band of the NR system may overlap with the frequency band of the LTE system. The UE may determine a first channel state feedback associated with the frequency band of the LTE system and a second channel state feedback associated with the frequency band of the NR system, at least in part, based on the first reference signal and the second reference signal, respectively. The UE may report the first channel state feedback or the second channel state feedback in uplink control information (UCI). Other aspects are provided.

Description

[0001] This application is a divisional application of the application with the application date of May 8, 2018, the application number of 201880030622.5 (the international application number is PCT / US2018 / 031621), and the title of "Techniques and Apparatus for Nesting New Radio Systems and Long Term Evolution Systems". Technical Field

[0002] Aspects of the present disclosure generally relate to wireless communication, and more particularly to techniques and apparatus for nesting a New Radio (NR) system and a Long Term Evolution (LTE) system. Background Art

[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ a multiple access technology 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, Long Term Evolution (LTE), and New Radio (NR).

[0004] A wireless communication network may include several base stations (BSs) capable of supporting communication of several user equipments (UEs). The UE may communicate with the BS via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, the BS may refer to a Node B, a gNB, an access point (AP), a radio head, a transmission reception point (TRP), a New Radio (NR) BS, a 5G Node B, and so on.

[0005] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments to communicate at the urban, national, regional, and even global levels. NR (which may also be referred to as 5G) is an enhanced set of the LTE mobile standard promulgated by the 3rd Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrums, and better integrating with other open standards that use OFDM with cyclic prefix (CP) (CP-OFDM) on the downlink (DL), CP-OFDM and / or SC-FDM on the uplink (UL) (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)), and support beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. However, as the demand for mobile broadband access continues to grow, there is a need for further improvement in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies. Summary of the Invention

[0006] In some aspects, a wireless communication method performed by a user equipment (UE) may include: obtaining synchronization information associated with a frequency band of an LTE system at least in part based on a set of synchronization signals associated with the frequency band of the LTE system; and receiving a reference signal associated with a frequency band of an NR system at least in part based on a quasi-co-location (QCL) indication and the synchronization information, wherein the QCL indication includes information indicating quasi-co-location between the reference signal associated with the frequency band of the NR system and the set of synchronization signals associated with the frequency band of the LTE system, and wherein the frequency band of the NR system overlaps with the frequency band of the LTE system.

[0007] In some aspects, a UE for wireless communication may include one or more processors configured to: obtain synchronization information associated with a frequency band of an LTE system at least in part based on a set of synchronization signals associated with the frequency band of the LTE system; and receive a reference signal associated with a frequency band of an NR system at least in part based on a QCL indication and the synchronization information, wherein the QCL indication includes information indicating quasi-co-location between the reference signal associated with the frequency band of the NR system and the set of synchronization signals associated with the frequency band of the LTE system, and wherein the frequency band of the NR system overlaps with the frequency band of the LTE system.

[0008] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to: obtain synchronization information associated with a frequency band of an LTE system based at least in part on a set of synchronization signals associated with the frequency band of the LTE system; and receive a reference signal associated with a frequency band of an NR system based at least in part on a QCL indication and the synchronization information, where the QCL indication includes information indicating quasi-co-location between the reference signal associated with the frequency band of the NR system and the set of synchronization signals associated with the frequency band of the LTE system, and where the frequency band of the NR system overlaps with the frequency band of the LTE system.

[0009] In some aspects, an apparatus for wireless communication may include: means for obtaining synchronization information associated with a frequency band of an LTE system based at least in part on a set of synchronization signals associated with the frequency band of the LTE system; and means for receiving a reference signal associated with a frequency band of an NR system based at least in part on a QCL indication and the synchronization information, where the QCL indication includes information indicating quasi-co-location between the reference signal associated with the frequency band of the NR system and the set of synchronization signals associated with the frequency band of the LTE system, and where the frequency band of the NR system overlaps with the frequency band of the LTE system.

[0010] In some aspects, a wireless communication method performed by a UE may include: measuring a reference signal associated with a frequency band of an LTE system; and determining channel state feedback associated with a frequency band of an NR system based at least in part on the reference signal associated with the frequency band of the LTE system, where the frequency band of the NR system overlaps with the frequency band of the LTE system.

[0011] In some aspects, a UE for wireless communication may include one or more processors configured to: measure a reference signal associated with a frequency band of an LTE system; and determine channel state feedback associated with a frequency band of an NR system based at least in part on the reference signal associated with the frequency band of the LTE system, where the frequency band of the NR system overlaps with the frequency band of the LTE system.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to: measure a reference signal associated with a frequency band of an LTE system; and determine channel state feedback associated with a frequency band of an NR system based at least in part on the reference signal associated with the frequency band of the LTE system, where the frequency band of the NR system overlaps with the frequency band of the LTE system.

[0013] In some aspects, a device for wireless communication may include: means for measuring a reference signal associated with a frequency band of an LTE system; and means for determining channel state feedback associated with a frequency band of an NR system at least in part based on the reference signal associated with the frequency band of the LTE system, wherein the frequency band of the NR system overlaps with the frequency band of the LTE system.

[0014] In some aspects, a wireless communication method performed by a UE may include: measuring a first reference signal associated with a frequency band of an LTE system and a second reference signal associated with a frequency band of an NR system, wherein the frequency band of the NR system overlaps with the frequency band of the LTE system; determining a first channel state feedback associated with the frequency band of the LTE system and a second channel state feedback associated with the frequency band of the NR system at least in part based on the first reference signal and the second reference signal; and reporting the first channel state feedback or the second channel state feedback in uplink control information (UCI).

[0015] In some aspects, a UE for wireless communication may include one or more processors configured to: measure a first reference signal associated with a frequency band of an LTE system and a second reference signal associated with a frequency band of an NR system, wherein the frequency band of the NR system overlaps with the frequency band of the LTE system; determine a first channel state feedback associated with the frequency band of the LTE system and a second channel state feedback associated with the frequency band of the NR system at least in part based on the first reference signal and the second reference signal; report the first channel state feedback or the second channel state feedback in UCI.

[0016] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: measure a first reference signal associated with a frequency band of an LTE system and a second reference signal associated with a frequency band of an NR system, wherein the frequency band of the NR system overlaps with the frequency band of the LTE system; determine a first channel state feedback associated with the frequency band of the LTE system and a second channel state feedback associated with the frequency band of the NR system at least in part based on the first reference signal and the second reference signal; and report the first channel state feedback or the second channel state feedback in UCI.

[0017] In some aspects, a device for wireless communication may include: means for measuring a first reference signal associated with a frequency band of an LTE system and a second reference signal associated with a frequency band of an NR system, where the frequency band of the NR system overlaps with the frequency band of the LTE system; means for determining, at least in part based on the first reference signal and the second reference signal, a first channel state feedback associated with the frequency band of the LTE system and a second channel state feedback associated with the frequency band of the NR system, respectively; and means for reporting the first channel state feedback or the second channel state feedback in the UCI.

[0018] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, wireless communication devices, and processing systems as substantially described herein with reference to the figures and the description and as illustrated in the figures and the description.

[0019] The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the present disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both as to their organization and operation methods, as well as the associated advantages, will be better understood when the following description is considered in conjunction with the accompanying figures. Each of the figures is provided for the purpose of illustration and description, and does not define a limitation of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To enable a more particular understanding of the manner in which the above-recited features of the present disclosure can be obtained, aspects may be described in more detail with reference to some of the aspects illustrated in the accompanying figures. It should be noted, however, that the figures illustrate only some typical aspects of the present disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects. The same reference numerals in different figures may identify the same or similar elements.

[0021] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0022] Figure 2 shows a block diagram conceptually illustrating an example of a base station and a UE in communication in a wireless communication network in accordance with various aspects of the present disclosure.

[0023] Figure 3 is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network in accordance with various aspects of the present disclosure.

[0024] Figure 4It is a block diagram conceptually illustrating an example subframe format with a normal cyclic prefix according to various aspects of the present disclosure.

[0025] Figure 5 It illustrates an example logical architecture of a distributed radio access network (RAN) according to various aspects of the present disclosure.

[0026] Figure 6 It illustrates an example physical architecture of a distributed RAN according to various aspects of the present disclosure.

[0027] Figure 7 It is a diagram illustrating an example of a downlink (DL) central subframe according to various aspects of the present disclosure.

[0028] Figure 8 It is a diagram illustrating an example of an uplink (UL) central subframe according to various aspects of the present disclosure.

[0029] Figure 9 It is a diagram illustrating an example of a set of synchronization signals associated with an LTE system utilized by an NR system according to various aspects of the present disclosure.

[0030] Figure 10 It is a diagram illustrating an example process, such as performed by a user equipment, according to various aspects of the present disclosure.

[0031] Figure 11 It is a diagram illustrating an example of a reference signal associated with an LTE system for determining channel state feedback associated with an NR system according to various aspects of the present disclosure.

[0032] Figure 12 It is a diagram illustrating an example process, such as performed by a user equipment, according to various aspects of the present disclosure.

[0033] Figure 13 It is a diagram illustrating an example of a first reference signal associated with an LTE system and a second reference signal associated with an NR system for determining a first channel state feedback associated with the LTE system and a second channel state feedback associated with the NR system according to various aspects of the present disclosure.

[0034] Figure 14 It is a diagram illustrating an example process, such as performed by a user equipment, according to various aspects of the present disclosure. Detailed Description

[0035] Aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. Based at least in part on teachings herein, those skilled in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the present disclosure. For example, any number of the aspects set forth herein may be utilized to implement a device or practice a method. Additionally, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functionality, or a combination of structures and functionality that supplement or are additional to the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of a claim. The term "exemplary" is used herein to mean "an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or superior to another aspect. Certain aspects of the telecommunications system will now be presented with reference to various devices and techniques. These devices and techniques will be described in detail below and illustrated in the drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0036] An access point ("AP") may include, be implemented as, or be referred to as: a B node, a radio network controller ("RNC"), an evolved B node (eNB), a base station controller ("BSC"), a base transceiver station ("BTS"), a base station ("BS"), a transceiver function ("TF"), a wireless router, a radio transceiver, a basic service set ("BSS"), an extended service set ("ESS"), a radio base station ("RBS"), a B node (NB), a gNB, a 5G NB, an NR BS, a transmission reception point (TRP), or some other term.

[0037] An access terminal (“AT”) may include, be implemented as, or be referred to as: an access terminal, a subscriber station, a subscriber unit, a mobile station, a remote station, a remote terminal, a user terminal, a user agent, a user device, a user equipment (UE), a user station, a wireless node, or some other term. In some aspects, an access terminal may include a cellular phone, a smart phone, a cordless phone, a Session Initiation Protocol (“SIP”) phone, a Wireless Local Loop (“WLL”) station, a Personal Digital Assistant (“PDA”), a tablet, a netbook, a smartbook, a superbook, a handheld device with wireless connectivity capabilities, a station (“STA”), or some other suitable processing device connected to a wireless modem. Thus, one or more aspects taught herein may be incorporated into a telephone (e.g., a cellular phone, a smart phone), a computer (e.g., a desktop), a portable communication device, a portable computing device (e.g., a laptop device, a personal data assistant, a tablet, a netbook, a smartbook, a superbook), a wearable device (e.g., a smart watch, smart glasses, a smart bracelet, a smart wristband, a smart ring, smart clothing, etc.), a medical device or equipment, a biometric sensor / device, an entertainment device (e.g., a music device, a video device, a satellite radio, a gaming device, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a Global Positioning System device, or any other suitable device configured to communicate via a wireless or wired medium. In some aspects, a node is a wireless node. A wireless node may provide connectivity to a network (e.g., a wide area network, such as the Internet or a cellular network) or provide connectivity to the network, for example, via a wired or wireless communication link. Some UEs may be considered Machine Type Communication (MTC) UEs, which may include remote devices that can communicate with a base station, another remote device, or some other entity. Machine Type Communication (MTC) may refer to communication involving at least one remote device at at least one end of the communication, and may include forms of data communication involving one or more entities that do not necessarily require human interaction. MTC UEs may include UEs capable of performing MTC communication with an MTC server and / or other MTC devices via, for example, a Public Land Mobile Network (PLMN). Examples of MTC devices include sensors, meters, location tags, monitors, drones, robots / robot devices, etc. MTC UEs, as well as other types of UEs, may be implemented as NarrowBand Internet of Things (NB-IoT) devices.

[0038] Note that while aspects may be described herein using terms typically associated with 3G and / or 4G wireless technologies, aspects of the present disclosure may be applied in other generation-based communication systems, including NR technology, such as 5G and later generations.

[0039] Figure 1FIG. 100 is a diagram of a network 100 in which aspects of the present disclosure may be practiced. Network 100 may be a 5G or NR network or some other wireless network, such as an LTE network. Wireless network 100 may include several BSs 110 (shown as BS110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with user equipment (UE) and may also be referred to as a base station, NR BS, Node B, gNB, 5G NB, access point, TRP, etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to the coverage area of a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0040] The BS may provide communication coverage for macro cells, pico cells, femto cells, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., with a radius of several kilometers) and may allow unrestricted access by UEs having a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs having a service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). The BS for a macro cell may be referred to as a macro BS. The BS for a pico cell may be referred to as a pico BS. The BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 the example shown in FIG. 100, BS110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0041] In some examples, a cell may not have to be stationary, and the geographic area of a cell may move according to the location of a mobile BS. In some examples, the BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in access network 100 via various types of backhaul interfaces, such as direct physical connections, virtual networks, and / or analogs using any suitable transport network.

[0042] The wireless network 100 may also include a relay station. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send the transmission of the data to a downstream station (e.g., a UE or a BS). A relay station can also be a UE that is capable of relaying transmissions for other UEs. In Figure 1 the example shown in, the relay station 110d can communicate with the macro BS 110a and the UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station can also be referred to as a relay BS, a relay base station, a repeater, etc.

[0043] The wireless network 100 can be a heterogeneous network that includes different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs can have different transmit power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS can have a high transmit power level (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0044] The network controller 130 can be coupled to the set of BSs and can provide coordination and control of these BSs. The network controller 130 can communicate with each BS via a backhaul. These BSs can also communicate with each other directly or indirectly, e.g., via a wireless or wired backhaul.

[0045] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. A UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. A UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, a superbook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle-mounted component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via wireless or wired media. Some UEs can be considered evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices such as sensors, meters, monitors, location tags, etc., which can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity to a network (e.g., a wide area network such as the Internet or a cellular network) or provide connectivity to the network via a wired or wireless communication link, for example. Some UEs can be considered Internet of Things (IoT) devices. Some UEs can be considered customer premise equipment (CPE). UE 120 can be included inside a housing 120' that houses components of UE 120, such as a processor component, a memory component, and so on.

[0046] In Figure 1 it, the solid line with double arrows indicates the desired transmission between the UE and the serving BS, which is the BS designated to serve the UE on the downlink and / or uplink. The dashed line with double arrows indicates a potential interference transmission between the UE and the BS.

[0047] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network can be deployed.

[0048] In some examples, access to an air interface may be scheduled, where a scheduling entity (e.g., a base station) allocates resources for communication among some or all of the devices and equipment within the service area or cell of the scheduling entity. Within this disclosure, as further discussed below, a scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for the communication being scheduled, the subordinate entities utilize the resources allocated by the scheduling entity.

[0049] A base station is not the only entity that can serve as a scheduling entity. That is, in some examples, a UE can serve as a scheduling entity to schedule resources for one or more subordinate entities (e.g., one or more other UEs). In this example, the UE is acting as the scheduling entity, and the other UEs utilize the resources scheduled by the UE for wireless communication. A UE can act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh network example, UEs can optionally communicate directly with each other in addition to communicating with the scheduling entity.

[0050] Thus, in a wireless communication network having scheduled access to time-frequency resources and having cellular, P2P, and mesh configurations, a scheduling entity and one or more subordinate entities can communicate using the scheduled resources.

[0051] As indicated above, Figure 1 is provided only by way of example. Other examples are possible and can differ from what is described with respect to Figure 1 what is described.

[0052] Figure 2 illustrates a block diagram of the design of base station 110 and UE 120, which can be one of the base stations and one of the UEs in Figure 1 . Base station 110 may be equipped with T antennas 234a through 234t, while UE 120 may be equipped with R antennas 252a through 252r, where generally T≥1 and R≥1.

[0053] At base station 110, a transmit processor 220 may receive data for one or more UEs from a data source 212, select one or more modulation and coding schemes (MCSs) for a UE at least in part based on channel quality indicators (CQIs) received from each UE, process (e.g., encode and modulate) data for the UE at least in part based on the selected MCS(s) for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., CRS) and synchronization signals (e.g., primary synchronization signal (PSS), secondary synchronization signal (SSS), tertiary synchronization signal (TSS), etc.). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process its respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively. According to certain aspects described in more detail below, position coding may be utilized to generate synchronization signals to convey additional information.

[0054] At UE 120, antennas 252a through 252r may receive downlink signals from base station 110 and / or other base stations and may provide the received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain an input sample. Each demodulator 254 may further process the input sample (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain the received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols, if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for UE 120 to a data sink 260, and provide the decoded control information and system information to a controller / processor 280. A channel processor may determine RSRP, RSSI, RSRQ, CQI, etc.

[0055] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 if applicable, further processed by the modulators 254a to 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, the uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 if applicable, and further processed by the receive processor 238 to obtain the decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0056] In some aspects, one or more components of the UE 120 may be included in a housing. Figure 2 The controller / processors 240 and 280 and / or any other components in may direct the operations at the base station 110 and the UE 120, respectively, to perform the operations associated with the nested NR system and the LTE system as described herein. For example, the controller / processor 280 and / or other processors and modules at the UE 120 may execute or direct the operations of the UE 120 to perform one or more operations associated with the nested NR system and the LTE system. For example, the controller / processor 280 and / or other controller / processors and modules at the UE 120 may execute or direct, for example Figure 10 process 1000, Figure 12 process 1200, Figure 14 process 1400, and / or the operations of other processes described herein. In some aspects, Figure 2 one or more of the components shown in may be used to perform the example process 1000, the example process 1200, the example process 1400, and / or other processes for the techniques described herein. The memories 242 and 282 may store data and program codes for the base station 110 and the UE 120, respectively. The scheduler 246 may schedule the UE for data transmission on the downlink and / or uplink.

[0057] As indicated above, Figure 2It is provided only by way of example. Other examples are possible and may differ from what is Figure 2 described with respect to

[0058] Figure 3 FIG. 300 shows an example frame structure for FDD in a telecommunication system (e.g., NR). The transmission timeline for each of the downlink and uplink can be divided into radio frames. Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and can be divided into 10 subframes with indices 0 to 9. Each subframe may include two time slots. Each radio frame may thus include 20 time slots with indices 0 to 19. Each time slot may include L symbol periods, e.g., 7 symbol periods for normal cyclic prefix (as Figure 3 shown in

[0059] Although some techniques are described herein in connection with frames, subframes, time slots, etc., these techniques can be equivalently applied to other types of wireless communication structures that may be referred to in 5G NR using terms other than "frame", "subframe", "time slot", etc. In some aspects, a wireless communication structure may refer to a periodically time-bounded communication unit defined by a wireless communication standard and / or protocol.

[0060] In certain telecommunication systems (e.g., NR), the BS may transmit a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a tertiary synchronization signal (TSS) on the downlink for each cell served by the BS. The PSS and SSS may be used by the UE for cell search and acquisition. For example, the PSS may be used by the UE to determine symbol timing, while the SSS may be used by the UE to determine the physical cell identifier associated with the BS and frame timing. The TSS may be used by the UE to identify the beam associated with the PSS and / or SSS. For example, in a scenario where the BS and UE communicate using multi-beam communication techniques (e.g., whereby the BS communicates with the UE via multiple beams), the BS may transmit a TSS that can be used by the UE to identify the beam associated with the PSS and / or SSS. The BS may also transmit a physical broadcast channel (PBCH). The PBCH may carry some system information, such as system information to support the initial access of the UE.

[0061] The BS may transmit other system information, such as system information blocks (SIBs) on the physical downlink shared channel (PDSCH), in some subframes. The BS may transmit control information / data on the physical downlink control channel (PDCCH) in B symbol periods of a subframe, where B may be configurable for each subframe. The BS may transmit traffic data and / or other data on the PDSCH in the remaining symbol periods of each subframe.

[0062] As indicated above, Figure 3 is provided only by way of example. Other examples are possible and may differ from what is Figure 3 described.

[0063] Figure 4 An example subframe format 410 with a normal cyclic prefix is shown. The available time-frequency resources may be partitioned into resource blocks. Each resource block may cover 12 subcarriers in a time slot and may include several resource elements. Each resource element may cover one subcarrier in a symbol period and may be used to transmit a modulation symbol that may be a real-valued or complex-valued number.

[0064] For FDD in some telecommunication systems (e.g., NR), an interleaving structure may be used for each of the downlink and uplink. For example, Q strands of interleaving with indices 0 to Q–1 may be defined, where Q may be equal to 4, 6, 8, 10, or some other value. Each strand of interleaving may include subframes spaced Q frames apart. Specifically, interleaving q may include subframes q, q+Q, q+2Q, etc., where q ∈ {0,…,Q-1}.

[0065] The wireless network may support hybrid automatic repeat request (HARQ) for data transmission on the downlink and uplink. For HARQ, the transmitter (e.g., BS) may send one or more transmissions of a packet until the packet is correctly decoded by the receiver (e.g., UE) or some other termination condition is encountered. For synchronous HARQ, all transmissions of the packet may be sent in subframes of a single strand of interleaving. For asynchronous HARQ, each transmission of the packet may be sent in any subframe.

[0066] The UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength, received signal quality, path loss, etc. The received signal quality may be quantified by the signal-to-interference-plus-noise ratio (SINR), or the reference signal received quality (RSRQ), or some other metric. The UE may operate in a strong interference scenario, in which the UE may observe severe interference from one or more interfering BSs.

[0067] While aspects of the examples described herein may be associated with NR or 5G technologies, aspects of the present disclosure may be applicable for use with other wireless communication systems.

[0068] New Radio (NR) may refer to a radio configured to operate according to a new air interface or a fixed transport layer (e.g., different from Internet Protocol (IP)). In aspects, NR may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and / or SC-FDM on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. In aspects, NR may utilize OFDM with CP (referred to herein as CP-OFDM) and / or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. NR may include enhanced mobile broadband (eMBB) services targeted at wide bandwidths (e.g., 80 megahertz (MHz) or more than 80 MHz), millimeter wave (mmW) targeted at high carrier frequencies (e.g., 60 gigahertz (GHz)), massive machine type communication (mMTC) targeted at non-backward compatible MTC technologies, and / or mission critical targeted at ultra-reliable low latency communication (URLLC) services.

[0069] A single component carrier bandwidth of 100 MHz may be supported. An NR resource block may span 12 subcarriers having a subcarrier bandwidth of 75 kilohertz (kHz) over a 0.1 ms duration. Each radio frame may include 50 subframes having a length of 10 ms. Thus, each subframe may have a length of 0.2 ms. Each subframe may indicate a link direction for data transmission (e.g., DL or UL) and the link direction for each subframe may be switched dynamically. Each subframe may include DL / UL data as well as DL / UL control data. The UL and DL subframes for NR may be described in more detail hereinafter with reference to Figure 7 and 8 more specifically.

[0070] Beamforming may be supported and beam directions may be configured dynamically. MIMO transmission with precoding may also be supported. MIMO configurations in the DL may support up to 8 transmit antennas (multi-layer DL transmission with up to 8 streams) and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported using up to 8 serving cells. Alternatively, NR may support different air interfaces other than the OFDM-based interface. An NR network may include entities such as a central unit or a distributed unit.

[0071] The RAN may include a Central Unit (CU) and a Distributed Unit (DU). The NR BS (e.g., gNB, 5G B node, B node, Transmission and Reception Point (TRP), Access Point (AP)) may correspond to one or more BSs. The NR cell may be configured as an Access Cell (ACell) or a Data Only Cell (DCell). For example, the RAN (e.g., the Central Unit or the Distributed Unit) may configure these cells. The DCell may be a cell for carrier aggregation or dual connectivity but not for initial access, cell selection / reselection, or handover. In some cases, the DCell may not transmit a synchronization signal - in some cases, the DCell may transmit an SS. The NR BS may transmit a downlink signal to the UE to indicate the cell type. At least partially based on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine the NR BSs to consider for cell selection, access, handover, and / or measurement at least partially based on the indicated cell type.

[0072] As indicated above, Figure 4 is provided by way of example only. Other examples are possible and may differ from those Figure 4 described herein.

[0073] Figure 5 An example logical architecture of a distributed RAN 500 in accordance with aspects of the present disclosure is illustrated. The 5G access node 506 may include an Access Node Controller (ANC) 502. The ANC may be the Central Unit (CU) of the distributed RAN 500. The backhaul interface to the Next Generation Core Network (NG-CN) 504 may terminate at the ANC. The backhaul interface to an adjacent Next Generation Access Node (NG-AN) may terminate at the ANC. The ANC may include one or more TRPs 508 (which may also be referred to as BSs, NR BSs, B nodes, 5G NBs, APs, gNBs, or some other term). As described above, the TRP may be used interchangeably with "cell".

[0074] The TRP 508 may be a Distributed Unit (DU). The TRP may be connected to one ANC (ANC 502) or more than one ANC (not illustrated). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific AND deployments, the TRP may be connected to more than one ANC. The TRP may include one or more antenna ports. The TRP may be configured to serve traffic to the UE individually (e.g., dynamic selection) or jointly (e.g., joint transmission).

[0075] The local architecture of RAN 500 can be used to illustrate the fronthaul definition. This architecture can be defined to support fronthaul solutions across different deployment types. For example, this architecture can be at least partially based on transport network capabilities (e.g., bandwidth, latency, and / or jitter).

[0076] This architecture can share features and / or components with LTE. According to various aspects, the Next Generation AN (NG-AN) 510 can support dual connectivity with NR. For LTE and NR, the NG-AN can share a common fronthaul.

[0077] This architecture can enable cooperation between and among the various TRPs 508. For example, cooperation can be preconfigured within the TRP and / or across the various TRPs via the ANC 502. According to various aspects, an inter-TRP interface may not be required / absent.

[0078] According to various aspects, there can be a dynamic configuration of split logical functions within the architecture of RAN 500. The PDCP, RLC, and MAC protocols can be adaptively placed at the ANC or the TRP.

[0079] According to some aspects, the BS can include a Central Unit (CU) (e.g., ANC 502) and / or one or more Distributed Units (e.g., one or more TRPs 508).

[0080] As indicated above, Figure 5 is provided only as an example. Other examples are possible and can be different from what is Figure 5 described.

[0081] Figure 6 An example physical architecture of a distributed RAN 600 according to various aspects of the present disclosure is illustrated. A Centralized Core Network Unit (C-CU) 602 can host core network functions. The C-CU can be centrally deployed. C-CU functionality can be offloaded (e.g., to Advanced Wireless Services (AWS)) to attempt to handle peak capacity.

[0082] A Centralized RAN Unit (C-RU) 604 can host one or more ANC functions. Optionally, the C-RU can locally host core network functions. The C-RU can have a distributed deployment. The C-RU can be closer to the network edge.

[0083] A Distributed Unit (DU) 606 can host one or more TRPs. The DU can be located at the edge of the network with radio frequency (RF) functionality.

[0084] As indicated above, Figure 6 is provided only as an example. Other examples are possible and can be different from what is Figure 6 described.

[0085] Figure 7 FIG. 700 is a diagram that illustrates an example of a DL-centric subframe or a radio communication structure. The DL-centric subframe may include a control portion 702. The control portion 702 may be present in an initial or start portion of the DL-centric subframe. The control portion 702 may include various scheduling information and / or control information corresponding to respective portions of the DL-centric subframe. In some configurations, the control portion 702 may be a physical DL control channel (PDCCH), as Figure 7 indicated. In some aspects, the control portion 702 may include legacy PDCCH information, shortened PDCCH (sPDCCH) information, a control format indicator (CFI) value (e.g., carried on a physical control format indicator channel (PCFICH)), one or more grants (e.g., downlink grant, uplink grant, etc.), and the like.

[0086] The DL-centric subframe may also include a DL data portion 704. The DL data portion 704 may sometimes be referred to as the payload of the DL-centric subframe. The DL data portion 704 may include communication resources for conveying DL data from a scheduling entity (e.g., a UE or a BS) to a subordinate entity (e.g., a UE). In some configurations, the DL data portion 704 may be a physical DL shared channel (PDSCH).

[0087] The DL-centric subframe may also include a UL short burst portion 706. The UL short burst portion 706 may sometimes be referred to as a UL burst, a UL burst portion, a common UL burst, a short burst, a UL short burst, a common UL short burst, a common UL short burst portion, and / or various other suitable terms. In some aspects, the UL short burst portion 706 may include one or more reference signals. Additionally or alternatively, the UL short burst portion 706 may include feedback information corresponding to respective other portions of the DL-centric subframe. For example, the UL short burst portion 706 may include feedback information corresponding to the control portion 702 and / or the data portion 704. Non-limiting examples of information that may be included in the UL short burst portion 706 include ACK signals (e.g., PUCCH ACK, PUSCH ACK, immediate ACK), NACK signals (e.g., PUCCH NACK, PUSCH NACK, immediate NACK), scheduling requests (SRs), buffer status reports (BSRs), HARQ indicators, channel state indications (CSIs), channel quality indicators (CQIs), sounding reference signals (SRSs), demodulation reference signals (DMRSs), PUSCH data, and / or various other suitable types of information. The UL short burst portion 706 may include additional or alternative information, such as information related to a random access channel (RACH) procedure, scheduling requests, and various other suitable types of information.

[0088] As Figure 7 explained, the end of the DL data portion 704 may be temporally separated from the start of the UL short burst portion 706. This temporal separation may sometimes be referred to as a gap, guard period, guard interval, and / or various other suitable terms. This separation provides time for switching from DL communication (e.g., a receive operation by a lower entity (e.g., a UE)) to UL communication (e.g., a transmit operation by a lower entity (e.g., a UE)). The foregoing is merely an example of a DL-centric wireless communication structure, and alternative structures with similar characteristics may exist without departing from the aspects described herein.

[0089] As indicated above, Figure 7 is provided merely as an example. Other examples are possible and may differ from what is described with respect to Figure 7 what is described.

[0090] Figure 8 FIG. 800 is a diagram that illustrates an example of a UL-centric subframe or wireless communication structure. The UL-centric subframe may include a control portion 802. The control portion 802 may be present in the initial or start portion of the UL-centric subframe. Figure 8 The control portion 802 in Figure 7 may be similar to the control portion 702 described above with reference to

[0091] As Figure 8 explained, the end of the control portion 802 may be temporally separated from the start of the UL long burst portion 804. This temporal separation may sometimes be referred to as a gap, guard period, guard interval, and / or various other suitable terms. This separation provides time for switching from DL communication (e.g., a receive operation by a scheduling entity) to UL communication (e.g., a transmit operation by a scheduling entity).

[0092] The UL-centric subframe may also include a UL short burst portion 806. Figure 8 The UL short burst portion 806 in Figure 7 may be similar to the UL short burst portion 706 described above with reference to Figure 7 and may include any information described above in connection with

[0093] In some environments, two or more lower-level entities (e.g., UEs) may communicate with each other using sidelink signals. Real-world applications of such sidelink communication may include public safety, proximity services, UE-to-network relay, vehicle-to-vehicle (V2V) communication, Internet of Everything (IoE) communication, IoT communication, mission-critical mesh, and / or various other suitable applications. Generally, a sidelink signal may refer to a signal that is conveyed from one lower-level entity (e.g., UE1) to another lower-level entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., UE or BS), even though the scheduling entity may be used for scheduling and / or control purposes. In some examples, sidelink signals may be conveyed using licensed spectrum (different from wireless local area networks, which typically use unlicensed spectrum).

[0094] In one example, a wireless communication structure (such as a frame) may include both UL central subframes and DL central subframes. In this example, the ratio of UL central subframes to DL central subframes in the frame may be dynamically adjusted based at least in part on the amount of UL data and DL data transmitted. For example, if there is more UL data, the ratio of UL central subframes to DL central subframes may be increased. Conversely, if there is more DL data, the ratio of UL central subframes to DL central subframes may be decreased.

[0095] As indicated above, Figure 8 is provided only as an example. Other examples are possible and may be different from those Figure 8 described.

[0096] An NR system (e.g., a network utilizing NR radio access technology) may be able to operate in the same frequency band as an LTE system (e.g., a network utilizing LTE radio access technology). For example, an NR system may be able to operate within a given frequency band (e.g., a frequency band having a subcarrier spacing of 60 kHz), where one or more subbands within the given frequency band overlap with one or more frequency bands utilized by the LTE system (e.g., a frequency band having a subcarrier spacing of 15 kHz). Thus, the one or more frequency bands utilized by the LTE system may be "reused" by the NR system to support the NR system. However, the use of these overlapping frequency bands should be such that the NR system does not interfere with, disrupt, or otherwise negatively impact the operation of the LTE system.

[0097] For example, when a resource set in an LTE band (e.g., a subframe, a part of a subframe, etc.) is not being utilized by the LTE system (e.g., when there is no synchronization signal (SS) or PBCH being transmitted in a downlink resource set, when there are no UEs connected to a base station associated with the LTE system, etc.), the resource set can be used for NR transmission. As another example, NR transmission can be time-division multiplexed with LTE transmission in a given LTE subframe (e.g., a mini-slot within the LTE subframe can be used for NR transmission). In some cases, the nesting of the NR and LTE systems can be implemented for uplink and downlink transmissions and can be achieved when the LTE system and / or the NR system is a time-division duplex (TDD) and / or frequency-division duplex (FDD) system.

[0098] Some aspects described herein provide techniques and apparatus for nesting an NR system and an LTE system such that resources in a frequency band utilized by both the NR system and the LTE system can be opportunistically utilized concurrently by both the NR system and the LTE system without negatively impacting the performance of either the NR system or the LTE system.

[0099] Figure 9 FIG. 900 is a diagram illustrating an example 900 of a set of synchronization signals associated with an LTE system utilized by an NR system in accordance with various aspects of the present disclosure.

[0100] As Figure 9 shown in and by reference numeral 905, a UE 120 can receive configuration information associated with a frequency band utilized by the LTE system (referred to herein as the LTE band) and a frequency band utilized by the NR system (referred to herein as the NR band) from a BS 110.

[0101] In some aspects, as described above, the NR band can overlap with the LTE band. For example, the NR system can be configured to operate within a given frequency band (e.g., a frequency band having a subcarrier spacing of 60 kHz), where one or more subbands within the given frequency band overlap with the LTE band (e.g., a frequency band having a subcarrier spacing of 15 kHz). In some aspects, multiple subbands of the NR band can overlap with multiple LTE bands (e.g., an NR band having a subcarrier spacing of 60 kHz can overlap with multiple LTE bands each having a subcarrier spacing of 15 kHz), where at least a portion of each of the multiple LTE bands overlaps with the NR band.

[0102] In some aspects, the configuration information may include information related to configuring the UE 120 to use synchronization information associated with an LTE band for synchronization associated with an NR band. For example, the configuration information may include information indicating that the UE 120 will use synchronization information determined at least in part based on a synchronization signal set associated with the LTE band (e.g., PSS, SSS, etc.) for synchronization associated with the NR band. In some aspects, the UE 120 may receive a reference signal associated with the NR band based at least in part on the synchronization information associated with the LTE band, as described below.

[0103] As further shown, in some aspects, the configuration information may include information signaling resources carrying reference signals associated with the NR band (e.g., channel state information reference signal (CSI-RS), DMRS associated with PDCCH, DMRS associated with PDSCH, etc.).

[0104] In some aspects, the UE 120 may receive the configuration information in one or more transmissions from the BS 110. In some aspects, the configuration information may be received in resources of another sub-band of the NR band (e.g., a sub-band of the NR band that does not overlap with the LTE band) and / or in resources of another NR band.

[0105] As indicated by reference numeral 910, the UE 120 may receive a quasi-co-location (QCL) indication associated with a reference signal and a synchronization signal set from the BS 110. In some aspects, the QCL indication may include information about the quasi-co-location between a synchronization signal set associated with the LTE band and a reference signal associated with the NR band indicating at least one or more QCL parameters. Such QCL parameters may include, for example, Doppler shift, Doppler spread, average delay, delay spread, etc. In some aspects, the UE 120 may receive a reference signal associated with the NR band based at least in part on the QCL indication, as described below.

[0106] As indicated by reference numeral 915, the UE 120 may obtain synchronization information associated with the LTE band. For example, at least in part based on an indication to use a synchronization signal set associated with the LTE band, the UE 120 may receive the synchronization signal set (e.g., PSS, SSS, etc.). Here, the UE 120 may obtain synchronization information based at least in part on the synchronization signal set. In some aspects, the synchronization information may include information that allows the UE 120 to achieve synchronization in the time domain (e.g., radio frame synchronization, sub-frame synchronization, slot synchronization, symbol synchronization, etc.); identify the center of the channel bandwidth in the frequency domain, etc. In some aspects, the synchronization information may include, for example, information identifying resource element positions, scrambling sequence information, shift information (e.g., v 移位 parameters), number of ports, etc.

[0107] As indicated by reference numeral 920, the UE 120 may receive a reference signal associated with an NR band based at least in part on a QCL indication and synchronization information. For example, the UE 120 may use timing and / or frequency information identified by the synchronization information and modified based at least in part on one or more QCL parameters to receive a reference signal associated with an NR band (e.g., in a resource signaled by the BS 110, as described above).

[0108] In some aspects, the UE 120 may receive other transmissions associated with the NR system. For example, the UE 120 may receive a PDCCH associated with a band of the NR system based at least in part on a QCL indication and synchronization information.

[0109] In this way, a synchronization signal set may be shared by the LTE system and the NR system, thereby improving the utilization efficiency of resources in overlapping NR and LTE bands. Notably, using the synchronization signal set to allow the UE 120 to receive a reference signal associated with an NR band does not negatively impact the performance of the LTE system (e.g., the synchronization of a UE configured with LTE is not affected by the NR system's use of the synchronization signal set).

[0110] As indicated above, Figure 9 is provided as an example. Other examples are possible and may differ from those Figure 9 described by reference.

[0111] Figure 10 is a diagram illustrating an example process 1000, e.g., performed by a UE, in accordance with various aspects of the present disclosure.

[0112] As shown in Figure 10 In some aspects, process 1000 may include: obtaining synchronization information associated with a band of the LTE system based at least in part on a synchronization signal set associated with the band of the LTE system (block 1010). For example, the UE 120 may obtain synchronization information associated with a band of the LTE system based at least in part on a synchronization signal set associated with the band of the LTE system, as described above.

[0113] As Figure 10As further shown, in some aspects, process 1000 may include: receiving a reference signal associated with a frequency band of an NR system at least in part based on the QCL indication and the synchronization information, where the QCL indication includes information indicating quasi - co - location between the reference signal associated with the frequency band of the NR system and a set of synchronization signals associated with the frequency band of the LTE system, and where the frequency band of the NR system overlaps with the frequency band of the LTE system (block 1020). For example, UE 120 may receive a reference signal associated with the frequency band of the NR system at least in part based on the QCL indication and the synchronization information, as described above.

[0114] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or with reference to any other process described herein.

[0115] In some aspects, UE 120 may receive configuration information indicating that UE 120 is to receive a reference signal associated with the frequency band of the NR system at least in part based on a set of synchronization signals associated with the frequency band of the LTE system. Here, the configuration information may be received via another frequency band of the NR system.

[0116] In some aspects, UE 120 may receive configuration information signaling resources in the frequency band of the NR system, where the resources include a reference signal associated with the frequency band of the NR system. Here, the configuration information may be received via another frequency band of the NR system.

[0117] In some aspects, UE 120 may receive a PDCCH associated with the frequency band of the NR system at least in part based on the QCL indication and the synchronization information.

[0118] In some aspects, the QCL indication may include information indicating quasi - co - location between the set of synchronization signals and the reference signal regarding at least one or more of Doppler shift, Doppler spread, average delay, or delay spread.

[0119] In some aspects, the set of synchronization signals may include at least one of PSS or SSS.

[0120] In some aspects, the reference signal may include CSI - RS, DMRS associated with PDCCH, or DMRS associated with PDSCH.

[0121] Although Figure 10 example blocks of process 1000 are shown, in some aspects, process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks compared to the blocks depicted in Figure 10 Additionally or alternatively, two or more blocks of process 1000 may be executed in parallel.

[0122] Figure 11 FIG. 1100 is an illustration of example 1100 for determining a reference signal associated with an LTE system for channel state feedback associated with an NR system in accordance with various aspects of the present disclosure.

[0123] As Figure 11 shown in and indicated by reference numeral 1105, the UE 120 may receive configuration information associated with both an LTE band and an NR band from the BS 110. In some aspects, as described above, the NR band may overlap with the LTE band.

[0124] In some aspects, as Figure 11 shown, the configuration information may include information signaling a resource (e.g., a resource carrying CSI-RS, an interference measurement resource (IMR) set, etc.) carrying a reference signal associated with the LTE band. In some aspects, the UE 120 may determine channel state feedback associated with the NR band at least in part based on the reference signal associated with the LTE band, as described below.

[0125] In some aspects, the configuration information may include information identifying a codebook associated with the NR band (referred to herein as the NR codebook). In some aspects, the NR codebook may include information that allows the UE 120 to calculate and / or determine channel state feedback (CSF) associated with the NR band. For example, the NR codebook may include information identifying a set of predefined precoding matrices associated with the NR system, and the UE 120 may determine a channel quality indicator (CQI), a rank indicator (RI), a precoding matrix indicator (PMI), etc. associated with the NR band at least in part based on this information. In some aspects, the NR codebook may be different from the codebook associated with the LTE band (i.e., the codebook based on which channel state feedback associated with the LTE band may be determined at least in part).

[0126] In some aspects, the configuration information may include information identifying a reporting mode to be used for reporting channel state feedback associated with the NR band. The reporting mode may include information identifying the manner in which the UE 120 will report channel state feedback associated with the NR system. For example, the reporting mode may indicate whether the UE 120 will report channel state feedback associated with the NR band in an uplink transmission associated with the LTE system or in an uplink transmission associated with the NR system. Additionally or alternatively, the reporting mode may identify a format for reporting channel state feedback associated with the NR system (e.g., an LTE-specific format, an NR-specific format).

[0127] As indicated by reference numeral 1110, the UE 120 may measure a reference signal associated with an LTE band. For example, the UE 120 may measure a reference signal associated with an LTE band at least in part based on a resource identified by configuration information that carries a reference signal associated with the LTE band.

[0128] As indicated by reference numeral 1115, the UE 120 may determine channel state feedback associated with an NR band at least in part based on an NR codebook and a reference signal associated with an LTE band. For example, the UE 120 may receive a reference signal associated with an LTE band and may determine a CQI, RI, PMI, etc. associated with the NR band at least in part based on one or more indices of the NR codebook.

[0129] As indicated by reference numeral 1120, the UE 120 may report channel state feedback associated with an NR band. For example, the UE 120 may determine channel state feedback associated with an NR system and may provide the channel state feedback to the BS 110.

[0130] In some aspects, the UE 120 may report channel state feedback associated with an NR band according to a configured reporting mode. For example, the UE 120 may report channel state feedback associated with an NR band in an uplink transmission associated with an LTE system (e.g., using a specific LTE-dependent format) or an uplink transmission associated with an NR system (e.g., using a specific NR-dependent format) according to a reporting mode configured on the UE 120. In some aspects, the UE 120 may report CQI, RI, PMI, information identifying an index of an NR codebook utilized by the UE 120, etc.

[0131] In some aspects, at least in part based on the channel state feedback reported by the UE 120, an NR PDSCH transmission associated with an NR system may be scheduled by the BS 110 and received by the UE 120.

[0132] In this way, the reference signal may be shared by the LTE system and the NR system, thereby improving the utilization efficiency of resources in overlapping NR and LTE bands. It is noted that the use of the reference signal by the UE 120 to determine channel state feedback associated with an NR band does not negatively impact the performance of the LTE system (e.g., the determination of channel state feedback by an LTE-configured UE is not affected by the use of the reference signal by the NR system).

[0133] As indicated above, Figure 11 is provided as an example. Other examples are possible and may differ from the reference Figure 11 described.

[0134] Figure 12 FIG. is an illustration of an example process 1200, such as performed by a UE, in accordance with various aspects of the present disclosure.

[0135] As Figure 12 shown, in some aspects, process 1200 may include: measuring a reference signal associated with a frequency band of an LTE system (block 1210). For example, UE 120 may measure a reference signal associated with a frequency band of an LTE system, as described above.

[0136] As Figure 12 further shown, in some aspects, process 1200 may include: determining channel state feedback associated with a frequency band of an NR system, at least in part based on a reference signal associated with a frequency band of the LTE system, wherein the frequency band of the NR system overlaps with the frequency band of the LTE system (block 1220). For example, UE 120 may determine channel state feedback associated with a frequency band of an NR system, at least in part based on a reference signal associated with a frequency band of the LTE system, wherein the frequency band of the NR system overlaps with the frequency band of the LTE system, as described above.

[0137] As Figure 12 further shown, in some aspects, process 1200 may include: reporting channel state feedback associated with a frequency band of an NR system determined at least in part based on a reference signal associated with the LTE system (block 1230). For example, UE 120 may report channel state feedback associated with a frequency band of an NR system determined at least in part based on a reference signal associated with the LTE system, as described above.

[0138] Process 1200 may include additional aspects, such as any individual aspect or any combination of aspects described below and / or with reference to any other process described herein.

[0139] In some aspects, UE 120 may receive configuration information signaling a resource set in a frequency band of the LTE system, the resource set carrying a reference signal associated with the frequency band of the LTE system.

[0140] In some aspects, UE 120 may receive configuration information identifying an NR codebook for determining channel state feedback associated with a frequency band of the NR system. Here, the NR codebook may be different from the LTE codebook used for determining channel state feedback associated with a frequency band of the LTE system.

[0141] In some aspects, UE 120 may receive configuration information identifying a reporting mode associated with reporting channel state feedback. Here, the reporting mode may indicate whether to report channel state feedback in an uplink transmission associated with a frequency band of an LTE system or in an uplink transmission associated with a frequency band of an NR system, and the UE may be configured to report channel state feedback according to the reporting mode.

[0142] In some aspects, UE 120 may be configured to report channel state feedback in an uplink transmission associated with a frequency band of an LTE system.

[0143] In some aspects, UE 120 may be configured to report channel state feedback in an uplink transmission associated with a frequency band of an NR system.

[0144] In some aspects, a reference signal associated with a frequency band of an LTE system may be CSI-RS.

[0145] In some aspects, a reference signal associated with a frequency band of an LTE system may be included in an IMR set associated with the frequency band of the LTE system.

[0146] In some aspects, the channel state feedback includes at least one of a CQI, RI, PMI, or an index of a codebook associated with determining the channel state feedback.

[0147] In some aspects, UE 120 may receive a PDSCH in a downlink transmission associated with an NR system. Here, the PDSCH may be scheduled at least in part based on the reported channel state feedback.

[0148] Although Figure 12 illustrates example blocks of process 1200, in some aspects, process 1200 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks compared to the blocks depicted in Figure 12 Additional or alternatively, two or more blocks of process 1200 may be executed in parallel.

[0149] Figure 13 is a diagram of example 1300 that illustrates a first reference signal associated with an LTE system and a second reference signal associated with an NR system for determining a first channel state feedback associated with the LTE system and a second channel state feedback associated with the NR system in accordance with various aspects of the present disclosure.

[0150] As Figure 13 shown in and indicated by reference numeral 1305, UE 120 may receive configuration information associated with an LTE frequency band and an NR frequency band from BS 110. In some aspects, as described above, the NR frequency band may overlap with the LTE frequency band.

[0151] In some aspects, such as Figure 13 shown, the configuration information may include information signaling resources carrying a first reference signal associated with an LTE band (e.g., resources carrying CSI-RS associated with an LTE band, IMR sets associated with LTE frequencies, etc.) and resources carrying a second reference signal associated with an NR band (e.g., resources carrying CSI-RS associated with an NR band, IMR sets associated with NR frequencies, etc.). In some aspects, the first resource set may be the same as the second resource set (i.e., the first reference signal may be carried in the same resource set as the second reference signal). Alternatively, the first resource set may be different from the second resource set.

[0152] In some aspects, UE 120 may determine a first channel state feedback associated with the LTE band based at least in part on a first reference signal associated with the LTE band, and may determine a second channel state feedback associated with the NR band based at least in part on a second reference signal associated with the NR band, as described below.

[0153] In some aspects, the configuration information may include information identifying a codebook associated with the LTE band (referred to herein as the LTE codebook) and a codebook associated with the NR band (i.e., the NR codebook). In some aspects, the LTE codebook may include information that allows UE 120 to calculate and / or determine a first channel state feedback associated with the LTE band, while the NR codebook may include information that allows UE 120 to calculate and / or determine a second channel state feedback associated with the NR band. For example, the LTE codebook may include information identifying a set of predefined precoding matrices, and UE 120 may determine CQI, RI, PMI, etc. associated with the LTE band based at least in part on this information. Similarly, the NR codebook may include information identifying a set of predefined precoding matrices, and UE 120 may determine CQI, RI, PMI, etc. associated with the NR band based at least in part on this information. In some aspects, the NR codebook may be different from the LTE codebook.

[0154] In some aspects, the configuration information may include information identifying a reporting mode to be used for reporting the first and second channel state feedbacks. The reporting mode may include information identifying the manner in which UE 120 will report the first and second channel state feedbacks. For example, the reporting mode may indicate whether UE 120 will report the first and second channel state feedbacks in an uplink transmission associated with the LTE system or in an uplink transmission associated with the NR system. Additionally or alternatively, the reporting mode may identify a format for reporting the first and second channel state feedbacks (e.g., an LTE-specific format, an NR-specific format).

[0155] In some aspects, the configuration information may include information identifying an encoding technique for generating uplink control information (UCI) for reporting first and second channel state feedback. For example, in some aspects, the encoding technique may indicate that UE 120 encodes a first CQI associated with the first channel state feedback in a first set of bits (e.g., a first set of five bits) of the UCI and encodes a second CQI associated with the second channel state feedback in a second set of bits (e.g., a second set of five bits) of the UCI (e.g., such that the first channel state feedback and the second channel state feedback are encoded separately). As another example, in some aspects, the encoding technique may indicate that UE 120 encodes a first CQI in a first set of bits (e.g., a set of five bits) of the UCI and encodes information identifying the difference (i.e., Δ) between the first CQI and the second CQI in a second set of bits (e.g., a set of two bits) of the UCI (e.g., such that the first channel state feedback and the second channel state feedback are jointly encoded). In this example, the second set of bits may include fewer bits than the first set of bits, which reduces the resources consumed in reporting the first and second CQIs. Other entries of the channel state feedback (e.g., first and second RIs, first and second PMIs, etc.) may be encoded in a similar manner according to the encoding technique.

[0156] As indicated by reference numeral 1310, UE 120 may measure a first reference signal associated with an LTE band and a second reference signal associated with an NR band. For example, UE 120 may measure the first reference signal associated with the LTE band at least in part based on a first resource set identified by the configuration information and carrying the first reference signal associated with the LTE band. Similarly, UE 120 may measure the second reference signal associated with the NR band at least in part based on a second resource set identified by the configuration information and carrying the second reference signal associated with the NR band.

[0157] As indicated by reference numeral 1315, UE 120 may determine first and second channel state feedbacks at least in part based on the first and second reference signals, respectively. For example, UE 120 may receive the first reference signal and may determine a CQI, RI, PMI, etc. associated with the LTE band at least in part based on one or more indices of an LTE codebook. Similarly, UE 120 may receive the second reference signal and may determine a CQI, RI, PMI, etc. associated with the NR band at least in part based on one or more indices of an NR codebook.

[0158] As indicated by reference numeral 1320, UE 120 may generate UCI at least in part based on a configured coding technique. For example, UE 120 may encode both first channel state feedback and second channel state feedback in the UCI according to a coding technique configured on UE 120.

[0159] As indicated by reference numeral 1325, UE 120 may report UCI including encoded first channel state feedback and second channel state feedback associated with an LTE band and an NR band, respectively. For example, UE 120 may report UCI including first channel state feedback and second channel state feedback to BS 110.

[0160] In some aspects, UE 120 may report UCI according to a configured reporting mode. For example, UE 120 may report UCI in an uplink transmission associated with the LTE system (e.g., using a specific LTE - specific format) or an uplink transmission associated with the NR system (e.g., using a specific NR - specific format) according to a reporting mode configured on UE 120. In some aspects, UE 120 may report (e.g., in the UCI) information identifying indices of an LTE codebook and an NR codebook used by UE 120 to determine the first and second channel state feedback, respectively.

[0161] In some aspects, at least in part based on the first and second channel state feedback reported by UE 120, an NR PDSCH transmission may be scheduled by BS 110 and received by UE 120. In some aspects, the NR PDSCH transmission may be sent in resources typically used for LTE transmissions and / or resources typically used for NR transmissions.

[0162] In this way, reference signals may be shared by the LTE system and the NR system, thereby improving the utilization efficiency of resources in overlapping NR and LTE bands. Notably, UE 120's use of LTE reference signals to determine channel state feedback associated with the LTE band does not negatively impact the performance of the LTE system (e.g., the determination of channel state feedback by an LTE - configured UE is not affected by the NR system's use of reference signals).

[0163] As indicated above, Figure 13 is provided as an example. Other examples are possible and may differ from what is Figure 13 described in the reference.

[0164] Figure 14 is a diagram illustrating an example process 1400, such as may be performed by a UE, in accordance with various aspects of the present disclosure.

[0165] As Figure 14As shown, in some aspects, process 1400 may include: measuring a first reference signal associated with a frequency band of an LTE system and a second reference signal associated with a frequency band of an NR system, where the frequency band of the NR system overlaps with the frequency band of the LTE system (block 1410). For example, UE 120 may measure a first reference signal associated with a frequency band of an LTE system and a second reference signal associated with a frequency band of an NR system, where the frequency band of the NR system overlaps with the frequency band of the LTE system, as described above.

[0166] As Figure 14 further shown, in some aspects, process 1400 may include: determining, at least in part based on the first reference signal and the second reference signal, a first channel state feedback associated with the frequency band of the LTE system and a second channel state feedback associated with the frequency band of the NR system for reporting in UCI (block 1420). For example, UE 120 may determine, at least in part based on the first reference signal and the second reference signal, a first channel state feedback associated with the frequency band of the NR system and a second channel state feedback associated with the frequency band of the NR system for reporting in UCI, as described above.

[0167] As Figure 14 further shown, in some aspects, process 1400 may include: reporting the first channel state feedback and the second channel state feedback in UCI (block 1430). For example, UE 120 may report the first channel state feedback and the second channel state feedback in UCI (e.g., jointly encoded in a single message), as described above.

[0168] Process 1400 may include additional aspects, such as any single aspect or any combination of aspects described below and / or with reference to any other process described herein.

[0169] In some aspects, the first channel state feedback and the second channel state feedback are reported in UCI, where the first channel state feedback and the second channel state feedback are jointly encoded in UCI.

[0170] In some aspects, UE 120 may receive configuration information identifying an LTE codebook for determining the first channel state feedback and an NR codebook for determining the second channel state feedback, where the first reference signal and the second reference signal are carried in the same resource set, and where the NR codebook is different from the LTE codebook such that the first channel state feedback is different from the second channel state feedback.

[0171] In some aspects, the UE 120 may receive configuration information identifying a reporting mode associated with reporting the UCI, where the reported UCI is associated with measurements performed in an overlapping band, and where the reporting mode indicates whether the UCI is to be reported in an uplink transmission associated with a band of the LTE system or in an uplink transmission associated with a band of the NR system, and the UE 120 is configured to report the UCI according to the reporting mode.

[0172] In some aspects, the UE 120 may receive configuration information identifying an encoding technique associated with reporting the UCI, and may generate the UCI including a first channel state feedback and a second channel state feedback based at least in part on the encoding technique.

[0173] In some aspects, the UE 120 may receive configuration information signaling a first resource set associated with a band of the LTE system carrying a first reference signal and a second resource set associated with a band of the NR system carrying a second reference signal. In some aspects, the first resource set and the second resource set may be the same resource set. Alternatively, in some aspects, the first resource set and the second resource set may be different resource sets.

[0174] In some aspects, the UE 120 may receive configuration information identifying an LTE codebook for determining a first channel state feedback and an NR codebook for determining a second channel state feedback. Here, the NR codebook may be different from the LTE codebook.

[0175] In some aspects, the UE 120 may receive configuration information identifying a reporting mode associated with reporting the UCI. Here, the reporting mode may indicate whether the UCI is to be reported in an uplink transmission associated with a band of the LTE system or in an uplink transmission associated with a band of the NR system, and the UE 120 may be configured to report the UCI according to the reporting mode.

[0176] In some aspects, the UE 120 may be configured to report the UCI in an uplink transmission associated with a band of the LTE system.

[0177] In some aspects, the UE 120 may be configured to report the UCI in an uplink transmission associated with a band of the NR system.

[0178] In some aspects, the UE 120 may receive configuration information identifying an encoding technique for generating UCI, and may generate UCI including a first channel state feedback and a second channel state feedback based at least in part on the encoding technique. In some aspects, the UE 120 may be configured to encode the first channel state feedback and the second channel state feedback in a first bit set and a second bit set of the UCI, respectively. Alternatively, in some aspects, the UE 120 may be configured to encode the first channel state feedback in a first bit set of the UCI and encode information identifying a difference between the first channel state feedback and the second channel state feedback in a second bit set of the UCI. Here, the second bit set may include fewer bits than the first bit set.

[0179] In some aspects, the first reference signal or the second reference signal may be a CSI-RS.

[0180] In some aspects, the first reference signal or the second reference signal may be included in the IMR set.

[0181] In some aspects, the first channel state feedback or the second channel state feedback includes at least one of a CQI, an RI, a PMI, or an index of a corresponding codebook.

[0182] In some aspects, the UE 120 may receive a PDSCH in a downlink transmission associated with an NR system or a downlink transmission associated with an LTE system. Here, the PDSCH may be scheduled based at least in part on the reported UCI.

[0183] Although Figure 14 example blocks of process 1400 are shown, in some aspects, process 1400 may include additional blocks, fewer blocks, different blocks, or blocks arranged differently than those depicted Figure 14 herein. Additionally or alternatively, two or more blocks of process 1400 may be executed in parallel.

[0184] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired by practicing the aspects.

[0185] As used herein, the term component is intended to be broadly construed as hardware, firmware, or a combination of hardware and software. As used herein, a processor is implemented with hardware, firmware, or a combination of hardware and software.

[0186] Some aspects are described herein in connection with a threshold. As used herein, meeting a threshold may refer to a value being 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.

[0187] It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, firmware, or a combination of hardware and software. The actual special control hardware or software code used to implement these systems and / or methods does not limit the aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software code—understanding that software and hardware can be designed to implement these systems and / or methods at least in part based on the description herein.

[0188] Although specific feature combinations are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of possible aspects. In fact, many of these features can be combined in ways not specifically recited in the claims and / or not disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of possible aspects includes each dependent claim in combination with every other claim in this set of claims. The phrase "at least one" in reference to a list of items refers to any combination of these items, including a single member. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination having multiple of the same element (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 ordering of a, b, and c).

[0189] Elements, acts, or instructions used herein should not be construed as critical or essential unless expressly described as such. Also, as used herein, the articles "a" and "an" are intended to include one or more items and can be used interchangeably with "one or more." Additionally, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and can be used interchangeably with "one or more." Where only one item is intended, the term "one" or similar language is used. Also, as used herein, the terms "having," "containing," "including," etc. are intended to be open-ended terms. Additionally, the phrase "based on" is intended to mean "at least partially based on" unless otherwise expressly stated.

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: Operating in a New Radio (NR) band; And Using the NR band to communicate with a network node, Wherein a plurality of Long Term Evolution (LTE) bands overlap with the NR band in a subframe, Wherein resources in the NR band are concurrently used by the NR system and the LTE system, Wherein NR transmissions are conveyed, and Wherein the NR transmissions are multiplexed with LTE transmissions in the subframe.

2. The method according to claim 1, wherein a plurality of subbands of the NR band overlap with the plurality of LTE bands.

3. The method according to claim 1, further comprising: Using an LTE band among the plurality of LTE bands to convey the LTE transmissions to the network node.

4. The method according to claim 1, wherein the NR transmissions are time-division multiplexed with the LTE transmissions in a mini-slot within the subframe.

5. The method according to claim 1, wherein the NR transmissions are downlink transmissions.

6. The method according to claim 1, wherein the resources include the subframe.

7. A method for wireless communication performed by a network node, comprising: Operating in a New Radio (NR) band; And Using the NR band to communicate with a user equipment, Wherein a plurality of Long Term Evolution (LTE) bands overlap with the NR band in a subframe, Wherein resources in the NR band are concurrently used by the NR system and the LTE system, Wherein NR transmissions are conveyed, and Wherein the NR transmissions are multiplexed with LTE transmissions in the subframe.

8. The method according to claim 7, wherein a plurality of subbands of the NR band overlap with the plurality of LTE bands.

9. The method according to claim 7, further comprising: Using an LTE band among the plurality of LTE bands to convey the LTE transmissions to at least one user equipment.

10. The method according to claim 7, wherein the NR transmissions are time-division multiplexed with the LTE transmissions in a mini-slot within the subframe.

11. The method according to claim 7, wherein the NR transmissions are downlink transmissions.

12. A user equipment (UE) for wireless communication, comprising: A memory; And One or more processors coupled to the memory, the one or more processors being configured to: Operate in a New Radio (NR) band; and Use the NR band to communicate with a network node, Wherein a plurality of Long Term Evolution (LTE) bands overlap with the NR band in a subframe, Wherein resources in the NR band are concurrently used by the NR system and the LTE system, Wherein NR transmissions are conveyed, and Wherein the NR transmissions are multiplexed with LTE transmissions in the subframe.

13. The UE according to claim 12, wherein a plurality of subbands of the NR band overlap with the plurality of LTE bands.

14. The UE according to claim 12, wherein the NR transmissions are downlink transmissions.

15. The UE according to claim 12, wherein the NR band is a band having a subcarrier spacing of 60 kilohertz (kHz).

16. The UE according to claim 12, wherein the one or more processors are further configured to: Receive configuration information associated with an LTE band among the plurality of LTE bands and the NR band.

17. The UE according to claim 16, wherein the configuration information is received from the network node.

18. The UE according to claim 16, wherein the configuration information includes information indicating that the UE is to use synchronization information for synchronization associated with the NR band.

19. The UE according to claim 18, wherein the synchronization information is associated with the LTE band.

20. The UE according to claim 16, wherein the configuration information includes information signaling resources carrying reference signals associated with the NR band.

21. The UE according to claim 12, wherein the LTE band among the plurality of LTE bands is a band having a subcarrier spacing of 15 kilohertz (kHz).

22. The UE according to claim 12, wherein the resource includes the subframe.

23. The UE according to claim 12, wherein the one or more processors are further configured to: Receive configuration information associated with the NR band in a subband of the NR band that does not overlap with the LTE band among the plurality of LTE bands.

24. The UE according to claim 12, wherein the one or more processors are further configured to: Receive configuration information associated with the NR band in different NR bands.

25. The UE according to claim 12, wherein the one or more processors are further configured to: Receive a reference signal associated with the NR band at least partially based on synchronization information associated with the LTE band among the plurality of LTE bands.

26. A network node for wireless communication, comprising: A memory; And One or more processors coupled to the memory, the one or more processors being configured to: Operate in a New Radio (NR) band; and Use the NR band to communicate with user equipment, Wherein a plurality of Long Term Evolution (LTE) bands overlap with the NR band in a subframe, Wherein resources in the NR band are concurrently used by the NR system and the LTE system, Wherein NR transmissions are conveyed, and Wherein the NR transmissions are multiplexed with LTE transmissions in the subframe.

27. The network node according to claim 26, wherein a plurality of subbands of the NR band overlap with the plurality of LTE bands.

28. The network node according to claim 26, wherein the NR transmission is a downlink transmission.

29. The network node according to claim 26, wherein the NR band is a band having a subcarrier spacing of 60 kilohertz (kHz).

30. The network node according to claim 26, wherein the NR transmissions are time-division multiplexed with the LTE transmissions in mini-slots within the subframe.

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