Waveform capability indication

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform. The UE may determine, based at least in part on the indication, whether the UE is able to communicate with the base station. The UE may selectively communicate with the base station using at least one of the one or more waveforms based at least in part on the determination. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 858,684, filed on June 7, 2019, entitled “WAVEFORM CAPABILITY INDICATION,” and U.S. Non-Provisional Patent Application No. 16 / 890,652, filed on June 2, 2020, entitled “WAVEFORM CAPABILITY INDICATION,” which are hereby expressly incorporated herein by reference.

[0003] Public domain

[0004] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for waveform capability indication.

[0005] background

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0007] A wireless communication network may include several base stations (BS) that can support communication of several user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from a BS to a UE, while uplinks (or reverse links) refer to the communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receive Point (TRP), a New Radio (NR) BS, a 5G Node B, and the like.

[0008] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different user equipment to communicate at city, country, region, and even global levels. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to better integrate with other open standards. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0009] Overview

[0010] In some aspects, a wireless communication method performed by a user equipment (UE) may include: receiving an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform; determining whether the UE is able to communicate with the base station based at least in part on the indication; and selectively communicating with the base station using at least one of the one or more waveforms based at least in part on the determination.

[0011] In some aspects, a wireless communication method performed by a base station may include: transmitting an indication of one or more waveforms supported by the base station, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform; and communicating with a UE using at least one of the one or more waveforms.

[0012] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform; determine whether the UE is capable of communicating with the base station based at least in part on the indication; and selectively communicate with the base station using at least one of the one or more waveforms based at least in part on the determination.

[0013] In some aspects, a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: transmit an indication of one or more waveforms supported by the base station, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform; and communicate with a UE using at least one of the one or more waveforms.

[0014] 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: receive an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform; determine whether the UE is capable of communicating with the base station based at least in part on the indication; and selectively communicate with the base station using at least one of the one or more waveforms based at least in part on the determination.

[0015] 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 base station, may cause the one or more processors to: transmit an indication of one or more waveforms supported by the base station, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform; and communicate with a UE using at least one of the one or more waveforms.

[0016] In some aspects, an apparatus for wireless communication may include: a device for receiving an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform; a device for determining whether the apparatus is capable of communicating with the base station based at least in part on the indication; and a device for selectively communicating with the base station using at least one of the one or more waveforms based at least in part on the determination.

[0017] In some aspects, an apparatus for wireless communication may include: a device for transmitting an indication of one or more waveforms supported by the apparatus, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform; and a device for communicating with a UE using at least one of the one or more waveforms.

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

[0019] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose 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 in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0022] Figure 1 is a diagram illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0023] Figure 2 is a diagram illustrating an example of a base station and a UE in communication in a wireless communication network according to various aspects of the present disclosure.

[0024] Figure 3 is a diagram illustrating an example of network access using different waveforms in accordance with various aspects of the present disclosure.

[0025] Figure 4 is a diagram illustrating examples of different UE waveform capabilities and different base station waveform capabilities according to various aspects of the present disclosure.

[0026] Figure 5-9 is a diagram illustrating an example of a waveform capability indication in accordance with various aspects of the present disclosure.

[0027] Fig.10 is a diagram illustrating an example process, performed, for example, by user equipment, in accordance with various aspects of the present disclosure.

[0028] Fig.11is a diagram illustrating example processes performed, for example, by a base station in accordance with various aspects of the present disclosure.

[0029] Fig.12 is a diagram illustrating examples of transmitter and receiver architectures for transmitting or receiving different waveforms according to various aspects of the present disclosure.

[0030] Detailed Description

[0031] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. Specifically, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0032] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0033] It should be noted that although various aspects may be described herein using terminology typically associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, such as 5G and later generations, including NR technologies.

[0034] Figure 11 is a diagram illustrating a wireless network 100 in which various aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include several BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, B node, gNB, 5G B node (NB), access point, transmit receive 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 a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0035] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. 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)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a 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. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0036] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces, such as direct physical connections, virtual networks, and / or the like using any suitable transport network.

[0037] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0038] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0039] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0040] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may 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, an ultrabook, 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 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.

[0041] Some UEs may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE120 may be included inside a housing that houses components of UE 120, such as a processor component, a memory component, and the like.

[0042] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0043] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0044] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described in Figure 1 Examples described.

[0045] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which may be Figure 1One for each base station and one for each UE in the base station 110. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1.

[0046] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the 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., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a 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 to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, position coding may be used to generate synchronization signals to convey additional information.

[0047] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in housing 284.

[0048] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a 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 a TX MIMO processor 266, if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 as well as 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 decoded data and control information sent by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and provide decoded control information to a 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.

[0049] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component(s) of the UE 120 may perform one or more techniques associated with waveform capability indication, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) may perform or direct e.g. Fig.10 The process of 1000 Fig.11 The operations of process 1100, and / or other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. Scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0050] In some aspects, UE 120 may include: means for receiving an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform; means for determining whether UE 120 is able to communicate with the base station based at least in part on the indication; means for selectively communicating with the base station using at least one of the one or more waveforms based at least in part on the determination, and so on. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are described.

[0051] In some aspects, base station 110 may include: means for transmitting an indication of one or more waveforms supported by the device, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform; means for communicating with a UE using at least one of the one or more waveforms, etc. In some aspects, such means may include in conjunction with Figure 2 One or more components of base station 110 are described.

[0052] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described in Figure 2 Examples described.

[0053] Figure 3 is a diagram illustrating an example 300 of network access using different waveforms in accordance with various aspects of the present disclosure.

[0054] As indicated by reference numeral 305, the UE may perform network access procedures using an initial bandwidth part (BWP), which may be a BWP reserved or dedicated for initial network access. The base station may transmit a synchronization system block (SSB) on the initial BWP, and the UE may measure one or more SSBs. Based at least in part on the measurement, the UE may determine system timing, may identify one or more beams for communicating with the base station, and so on. As indicated by reference numeral 310, after obtaining one or more SSBs, the UE and the base station may communicate using a particular waveform, such as a CP-OFDM waveform or a single carrier (SC) waveform.

[0055] Some NR bands, such as frequency range 1 (FR1) (e.g., sub-6 GHz bands) and FR2 (e.g., millimeter wave bands including bands above, for example, 24 GHz), may operate using an OFDM waveform for downlink communications and may operate using an OFDM waveform or an SC waveform for uplink communications. The OFDM waveform may use a cyclic prefix (CP) and in such cases may be referred to as a CP-OFDM waveform. The OFDM waveform may provide a relatively high signal-to-noise ratio (SNR), a relatively high spectral efficiency, and / or a relatively high-order single-user and / or multi-user MIMO (e.g., compared to an SC waveform). The SC waveform may include a discrete Fourier transform spread OFDM (DFT-s-OFDM). The SC waveform may provide a relatively low peak-to-average power ratio (PAPR) for better coverage and / or a relatively low complexity for reception and transmission (e.g., compared to an OFDM waveform). The SC waveform may include, for example, a single carrier time domain (SC-TD) waveform or a single carrier frequency domain (SC-FD) waveform.

[0056] NR may include other frequency ranges, such as frequency range 4 (FR4), which may include spectrum between 52 GHz and 115 GHz. For FR4, SC waveforms may be used for downlink communications (unlike FR1 and FR2) to improve PAPR and reduce complexity. SC waveforms may include SC-TD waveforms or SC-FD waveforms to achieve different performance tradeoffs. However, allowing the use of multiple different waveforms (e.g., for downlink communications) (such as OFDM waveforms, SC-TD waveforms, and / or SC-FD waveforms) may result in failed communications between UEs and base stations without proper coordination of which waveform to use. In addition, some waveforms may be supported by some UEs and / or some base stations, and may not be supported by other UEs and / or other base stations. This may result in incompatibility between UEs and base stations without properly communicating such capabilities.

[0057] Some techniques and apparatus described herein allow a base station and a UE to coordinate the use of waveforms from multiple waveform types, such as OFDM, SC-TD, SC-FD, etc. Such techniques and apparatus may be applicable to FR4 spectrum and / or other spectrum.

[0058] As indicated above, Figure 3 are provided as examples. Other examples may differ from those described herein. Figure 3 Examples described.

[0059] Figure 4 is a diagram illustrating an example 400 of different UE waveform capabilities and different base station waveform capabilities in accordance with various aspects of the present disclosure.

[0060] like Figure 4 As shown, the UE and the base station may have various different waveform capabilities, such as using different types of transmitters and / or receivers (e.g., as described below in conjunction with Fig.12 As described). For example, as shown in reference numeral 405, the UE may have the ability to receive but not transmit communications on an initial BWP using an OFDM waveform (shown as Init OFDM RX), and may have the ability to transmit and receive subsequent communications on a wideband BWP using an SC-TD waveform but not using an SC-FD waveform or an OFDM waveform (shown as SC TD TX / RX). This capability is shown as Init OFDM RX+SC-TD TX / RX. As shown in reference numeral 410, the UE may have the ability to transmit and receive communications on an initial BWP using an OFDM waveform, and may have the ability to transmit and receive subsequent communications on a wideband BWP using an SC-TD waveform but not using an SC-FD waveform or an OFDM waveform. This capability is shown as [Init OFDM+SC TD] TX / RX.

[0061] As shown in reference numeral 415, the UE may have the ability to transmit and receive communications on the initial BWP using an OFDM waveform, and may have the ability to transmit and receive subsequent communications on the wideband BWP using an SC-TD waveform and an SC-FD waveform but not an OFDM waveform. This capability is shown as [Init OFDM+SC TD&FD]TX / RX. As shown in reference numeral 420, the UE may have the ability to transmit and receive communications on the initial BWP using an OFDM waveform, and may have the ability to transmit and receive subsequent communications on the wideband BWP using an SC-TD waveform, an SC-FD waveform, and an OFDM waveform. This capability is shown as [Full OFDM+SC TD&FD]TX / RX. Figure 4 The UE capabilities shown are provided as examples, and other UE capabilities may differ from those shown.

[0062] As shown in reference numeral 425, the base station (BS) may have the ability to transmit but not receive communications on an initial BWP using an OFDM waveform (shown as Init OFDM TX), and may have the ability to transmit and receive subsequent communications on a wideband BWP using an SC-TD waveform but not using an SC-FD waveform or an OFDM waveform (shown as SC TD TX / RX). This capability is shown as InitOFDM TX+SC-TD TX / RX. As shown in reference numeral 430, the base station may have the ability to transmit and receive communications on an initial BWP using an OFDM waveform, and may have the ability to transmit and receive subsequent communications on a wideband BWP using an SC-TD waveform but not using an SC-FD waveform or an OFDM waveform. This capability is shown as [Init OFDM+SC TD]TX / RX.

[0063] As shown in reference numeral 435, the base station may have the ability to transmit and receive communications on the initial BWP using an OFDM waveform, and may have the ability to transmit and receive subsequent communications on the wideband BWP using an SC-TD waveform and an SC-FD waveform but not an OFDM waveform. This capability is shown as [Init OFDM+SC TD&FD]TX / RX. As shown in reference numeral 440, the base station may have the ability to transmit and receive communications on the initial BWP using an OFDM waveform, and may have the ability to transmit and receive subsequent communications on the wideband BWP using an SC-TD waveform, an SC-FD waveform, and an OFDM waveform. This capability is shown as [Full OFDM+SC TD&FD]TX / RX. Figure 4 The base station capabilities shown are provided as examples, and other base station capabilities may vary from what is shown.

[0064] like Figure 4 As further shown, different combinations of UE capabilities and base station capabilities may allow different types of waveforms to be used to perform network procedures (e.g., communication of remaining minimum system information (RMSI), random access channel (RACH) procedures, radio resource control (RRC) procedures, etc.). For example, as shown by reference numeral 445, some combinations of UE and base station waveform capabilities may allow one or more default or minimum capability procedures to be performed, which may include base station transmission or UE reception of RMSI using an SC-TD waveform on a wideband BWP or using an OFDM waveform on an initial BWP (shown as RMSI over SC TD (or) Init-OFDM), and / or it may include performing RACH procedures and / or RRC procedures using an SC-TD waveform on a wideband BWP (shown as RACH / RRC over SCTD).

[0065] As shown at reference numeral 450, some combinations of UE and base station waveform capabilities may allow for the execution of default or minimum capability procedures(s), and may also allow for the execution of RACH procedures and / or RRC procedures using an OFDM waveform on an initial BWP (shown as RACH / RRC over +Init-OFDM). As shown at reference numeral 455, some combinations of UE and base station waveform capabilities may allow for the execution of default or minimum capability procedures(s), and may allow for the execution of RACH procedures and / or RRC procedures using an OFDM waveform on an initial BWP (shown as RACH / RRC over Init-OFDM), and may allow for the execution of RACH procedures and / or RRC procedures using an SC-FD waveform on a wideband BWP (shown as RACH / RRC over SC FD).

[0066] As shown by reference numeral 460, some combinations of UE and base station waveform capabilities may allow performance of default or minimum capability procedures(s), may allow performance of RACH procedures and / or RRC procedures using OFDM waveform on initial BWP (shown as RACH / RRC over Init-OFDM), and may allow RMSI to be communicated using SC-FD waveform on wideband BWP (shown as RMSI over SC FD). As shown by reference numeral 465, some combinations of UE and base station waveform capabilities may allow performance of default or minimum capability procedures(s), may allow performance of RACH procedures and / or RRC procedures using OFDM waveform on initial BWP (shown as RACH / RRC over Init-OFDM), may allow performance of RMSI to be communicated using SC-FD waveform on wideband BWP (shown as RMSI over SC FD), and may allow performance of RACH procedures and / or RRC procedures using SC-FD waveform on wideband BWP (shown as RACH / RRC over SC FD).

[0067] As shown by reference numeral 470, some combinations of UE and base station waveform capabilities may allow performance of (all) default or minimum capability procedures, may allow performance of RACH procedures and / or RRC procedures using OFDM waveforms on initial BWP, may allow RMSI to be communicated using SC-FD waveforms or OFDM waveforms on wideband BWP, and may allow performance of RACH procedures and / or RRC procedures using SC-FD waveforms or OFDM waveforms on wideband BWP. In this case, the combination of capabilities may allow communication between the UE and the base station (e.g., for communication of RMSI, for RACH procedures, for RRC procedures, etc.) using OFDM waveforms on initial BWP, SC-TD waveforms on wideband BWP, SC-FD waveforms on wideband BWP, and OFDM waveforms on wideband BWP (shown as “any combination is OK”). Allowing the use of multiple different waveforms (e.g., OFDM waveform, SC-TD waveform, SC-FD waveform, etc.) depending on a combination of UE waveform capabilities and base station waveform capabilities can lead to failed communications between the UE and the base station without proper coordination of which waveform(s) to use for different network procedures and / or for communication of different types of information. Some techniques and apparatus described herein allow a base station and a UE to coordinate the use of waveforms from multiple waveform types (such as OFDM, SC-TD, SC-FD, etc.). Such techniques and apparatus may be applicable to FR4 spectrum and / or other spectrum. In this way, a base station and a UE may be able to communicate using the same type of waveform.

[0068] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described herein. Figure 4 Examples described.

[0069] Figure 5 is a diagram illustrating an example 500 of a waveform capability indication in accordance with various aspects of the present disclosure. Figure 5 As shown, base station 110 and UE 120 can communicate with each other. In some aspects, base station 110 is a serving base station serving UE 120.

[0070] As indicated by reference numeral 505, the base station 110 may transmit, and the UE 120 may receive, an indication of one or more waveforms supported by the base station 110. As further shown, the one or more waveforms include an OFDM waveform (e.g., for use on a wideband BWP, since OFDM is always available on an initial BWP), an SC-FD waveform, and / or an SC-TD waveform. In some aspects, the indication of the waveform(s) supported by the base station 110 may be referred to as a base station waveform capability, a waveform capability of the base station, and the like. In some aspects, the indication may further indicate whether the one or more waveforms supported by the base station 110 are supported for transmission (TX), for reception (RX), or for both transmission and reception. For example, the base station 110 may indicate the above in conjunction with Figure 4 (e.g., one or more waveform capabilities described in conjunction with reference numerals 425, 430, 435, and 440).

[0071] In some aspects, the base station 110 may use a signaling message to transmit an indication of the base station waveform capabilities (e.g., using a field in the signaling message or an explicit indication in an information element (IE)). For example, the base station 110 may transmit the indication in a physical broadcast channel (PBCH) communication (e.g., PBCH payload, SS / PBCH block, etc.), in an RMSI, in other system information (OSI), in an RRC message, in a medium access control (MAC) control element (MAC-CE), in downlink control information (DCI), etc. The signaling message used to transmit the indication may specify the communication type and / or network procedures for which the shared waveform support may be used. For example, if the base station waveform capabilities are indicated in the PBCH communication, this may allow the UE 120 to determine the waveform to be used to receive the RMSI. However, if the base station waveform capabilities are indicated in the RMSI, a default waveform may be used to receive the RMSI (and the UE 120 may determine the waveform to be used to perform the RACH procedure, the RRC procedure, etc.).

[0072] Additionally or alternatively, the base station 110 may scramble and / or modify a signal to indicate the base station waveform capabilities. For example, the base station 110 may scramble or modify a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH demodulation reference signal (DMRS), a PBCH cyclic redundancy check (CRC), a reference signal in an SSB, and the like. For example, a first scrambling identity or a first set of scrambling identities may indicate a first set of waveforms (e.g., one or more waveforms) supported by the base station 110, and a second scrambling identity or a second set of scrambling identities may indicate a second set of waveforms (e.g., one or more waveforms) supported by the base station 110.

[0073] As indicated by reference numeral 510, UE 120 may determine, based at least in part on the indication, whether UE 120 is capable of communicating with base station 110. In some aspects, UE 120 may determine whether both UE 120 and base station 110 have the capability to communicate using the same type of waveform, such as by comparing the UE waveform capabilities with the received base station waveform capabilities. In some aspects, if at least one waveform in the UE waveform capabilities matches a waveform in the base station waveform capabilities, UE 120 may determine that UE 120 and base station 110 are capable of communicating with each other. In this case, UE 120 may determine at least one waveform to be used for communication from one or more matching waveforms. In some aspects, if none of the waveforms that UE 120 is capable of using matches the waveform indicated by base station 110, UE 120 may determine that UE 120 and base station 110 are unable to communicate with each other (e.g., on a wideband BWP). In this case, UE 120 may refrain from performing network procedures with base station 110 (e.g., obtaining RMSI, performing RACH procedures, performing RRC procedures, etc.).

[0074] As indicated by reference numeral 515, UE 120 may selectively communicate with base station 110 using at least one of the one or more waveforms. For example, if UE 120 determines that UE 120 and base station 110 are able to communicate with each other, such communication may occur. Conversely, if UE 120 determines that UE 120 and base station 110 are unable to communicate with each other, such communication does not occur. In some aspects, if UE 120 supports multiple waveforms that are also supported by base station 110, UE 120 may use blind decoding and / or hypothetical detection to attempt to receive or decode communications using one or more of the multiple waveforms.

[0075] In some aspects, the base station 110 may transmit a first set of SSBs using an OFDM waveform and may transmit a second set of SSBs using an SC waveform (e.g., one of an SC-FD waveform or an SC-TD waveform). Additionally or alternatively, the base station 110 may transmit a first set of SSBs using an OFDM waveform, may transmit a second set of SSBs using an SC-TD waveform, and may transmit a third set of SSBs using an SC-FD waveform. In this case, the base station 110 may indicate SSB transmission modes (e.g., a set of time resources, frequency resources, space resources, etc.) for different sets of SSBs in system information (e.g., for a standalone mode) or in an RRC message (e.g., for a non-standalone mode). For example, the base station 110 may indicate a first SSB transmission mode for SSBs transmitted using an OFDM waveform, may indicate a second SSB transmission mode for SSBs transmitted using an SC-TD waveform, may indicate a third SSB transmission mode for SSBs transmitted using an SC-FD waveform, and so on. In this case, UE 120 may determine the SSB transmission mode for a waveform supported by UE 120 and base station 110 (and / or a waveform selected by UE 120 in the case of multiple matching waveforms), and may monitor for SSBs transmitted according to the SSB transmission mode for the waveform. Alternatively, UE 120 may process the received SSB using a different waveform hypothesis (e.g., using blind decoding, etc.) to obtain the SSB.

[0076] Alternatively or additionally, the base station 110 may transmit the first RMSI using an OFDM waveform and may transmit the second RMSI using an SC waveform (e.g., one of an SC-FD waveform or an SC-TD waveform). In some aspects, the base station 110 may transmit the first RMSI using an OFDM waveform, may transmit the second RMSI using an SC-TD waveform, and may transmit the third RMSI using an SC-FD waveform. In some aspects, the base station 110 may indicate RMSI transmission modes (e.g., a set of time resources, frequency resources, space resources, etc.) for different RMSIs in a manner similar to that described above for SSB. In this case, the UE 120 may determine the RMSI transmission mode for a waveform supported by the UE 120 and the base station 110 (and / or a waveform selected by the UE 120 in the case of multiple matching waveforms), and may monitor to find RMSI transmitted according to the RMSI transmission mode for the waveform. Alternatively, the UE 120 may process the received RMSI using different waveform hypotheses (e.g., using blind decoding, etc.) to obtain the RMSI.

[0077] In some aspects, the base station 110 may transmit a PBCH payload using a first waveform. The PBCH payload may indicate the location of the SSB and / or RMSI transmitted using a different second waveform (e.g., a set of time resources, frequency resources, space resources, etc.). For example, the base station 110 may transmit the PBCH payload using an OFDM waveform (e.g., in an initial BWP, in an SS / PBCH block, etc.), and the PBCH payload may indicate the location of the SSB (or set of SSBs) and / or RMSI transmitted using an SC waveform. In some aspects, the PBCH payload may indicate a first location of the SSB and / or RMSI transmitted using an SC-TD waveform and / or a second location of the SSB and / or RMSI transmitted using an SC-FD waveform. The position(s) may be indicated as an absolute position or a relative position (e.g., an offset from the PBCH payload, an offset from the SSB transmitted using the first waveform, etc.). In this case, UE 120 may receive the PBCH payload using the first waveform and may use the PBCH payload to determine the location of (and obtain) one or more SSBs and / or RMSIs transmitted using the second waveform.

[0078] In some aspects, the base station 110 may indicate (e.g., using RMSI, etc.) a first set of RACH resources (e.g., time, frequency, and / or spatial resources) for an OFDM waveform and a second set of RACH resources for an SC waveform (e.g., one of an SC-FD waveform or an SC-TD waveform). Additionally or alternatively, the base station 110 may indicate a first set of RACH resources for an OFDM waveform, a second set of RACH resources for an SC-TD waveform, and a third set of RACH resources for an SC-FD waveform. In this case, the UE 120 may use the indication to determine a set of RACH resources to be used for a waveform supported by the UE 120 and the base station 110 (and / or a waveform selected by the UE 120 in the case of multiple matching waveforms), and may transmit and / or receive RACH messages using the set of RACH resources for the waveform.

[0079] In some aspects, the base station waveform capabilities may be beam specific. In this case, the base station 110 may indicate different base station waveform capabilities for different beams and / or different sets of beams. Additionally or alternatively, when the UE 120 switches beams (e.g., from a first beam using a first waveform to a second beam using a second waveform), the UE 120 may reset a MAC buffer and / or a radio link control (RLC) buffer because different waveforms may support different payload sizes.

[0080] By indicating the base station waveform capabilities that allow the use of a variety of different waveforms (e.g., OFDM waveforms, SC-TD waveforms, SC-FD waveforms, etc.) in a communication system (e.g., an NR system on an FR4 band), network performance may be improved. For example, the base station 110 and the UE 120 may coordinate the use of waveforms supported by both the base station 110 and the UE 120. In addition, different waveforms may be selected in different scenarios (such as for different network loads, different UE battery conditions, etc.).

[0081] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described herein. Figure 5 Examples described.

[0082] Figure 6 is a diagram illustrating another example 600 of a waveform capability indication in accordance with various aspects of the present disclosure. Figure 6 As shown, serving base station 110-1 and UE 120 may communicate with each other. In some aspects, serving base station 110-1 may relay base station waveform capabilities of neighboring base station 110-2 to UE 120 (e.g., neighboring base station waveform capabilities, combined with Figure 5 In some aspects, neighbor base station waveform capabilities may be used for base station (e.g., cell) selection and / or switching.

[0083] As shown in reference numeral 605, the neighbor base station 110-2 may be combined with the above Figure 5 In a manner similar to that described above, an indication of one or more waveforms supported by the neighbor base station 110-2 is transmitted to the serving base station 110-1. The one or more waveforms may include an OFDM waveform (e.g., for use on a wideband BWP, because OFDM is always available on an initial BWP), an SC-FD waveform, and / or an SC-TD waveform. In some aspects, the indication of the waveform(s) supported by the neighbor base station 110-2 may be referred to as a neighbor base station waveform capability, a waveform capability of the neighbor base station, and so on. In some aspects, the indication may further indicate whether the one or more waveforms supported by the neighbor base station 110-2 are supported for transmission (TX), for reception (RX), or for both transmission and reception. For example, the neighbor base station 110-2 may indicate the above in combination with Figure 4 (e.g., one or more waveform capabilities described in conjunction with reference numerals 425, 430, 435, and 440).

[0084] In some aspects, neighbor base station 110-2 may indicate the one or more waveforms via a wired interface with serving base station 110-1. Additionally or alternatively, neighbor base station 110-2 may indicate the one or more waveforms via a wireless interface with serving base station 110-1. For example, neighbor base station 110-2 may indicate the one or more waveforms in accordance with the above description. Figure 5 In a manner similar to that described, a signaling message is used to convey an indication of the neighbor base station waveform capabilities (e.g., using a field in the signaling message or an explicit indication in an IE), and / or a signal is scrambled and / or modified to indicate the neighbor base station waveform capabilities.

[0085] As indicated at reference numeral 610, serving base station 110-1 may transmit an indication of the one or more waveforms supported by neighbor base station 110-2 to UE 120. The indication may be transmitted in a signaling message and / or by scrambling or modifying the signal, as described above.

[0086] As shown at 615, the UE 120 may be configured as described above. Figure 5 1 and 120. The UE 120 may determine whether the UE 120 is able to communicate with the neighboring base station 110-2 based at least in part on the indication in a manner similar to that described above. As shown at 620, the UE 120 may determine whether the neighboring base station 110-2 is able to communicate with the neighboring base station 110-2 based at least in part on the indication. Figure 5 At least one of the one or more waveforms is used to selectively communicate with neighbor base station 110-2 in a manner similar to that described. As further shown, UE 120 may determine whether to select neighbor base station 110-2 (eg, for handover).

[0087] In some aspects, UE 120 may determine whether to select neighbor base station 110-2 based at least in part on whether UE 120 is able to communicate with neighbor base station 110-2. For example, UE 120 may determine whether both UE 120 and neighbor base station 110-2 have the ability to communicate using the same type of waveform, such as by comparing the UE waveform capabilities with the received neighbor base station waveform capabilities. In some aspects, if at least one waveform in the UE waveform capabilities matches a waveform in the neighbor base station waveform capabilities, UE 120 may determine that UE 120 and neighbor base station 110-2 are able to communicate with each other. In this case, UE 120 may determine at least one waveform to be used for communication from one or more matching waveforms, and / or UE 120 may select neighbor base station 110-2 for handover (or may include neighbor base station 110-2 in a candidate list for selection). In some aspects, if none of the waveforms that UE 120 is capable of using matches the waveform indicated by neighbor base station 110-2, UE 120 may determine that UE 120 and neighbor base station 110-2 cannot communicate with each other (e.g., over a wideband BWP). In this case, UE 120 may refrain from performing network procedures (e.g., cell selection, handover, etc.) with neighbor base station 110-2. For example, UE 120 may refrain from selecting neighbor base station 110-2 and / or may exclude neighbor base station 110-2 from a candidate list for cell selection.

[0088] Additionally or alternatively, UE 120 may select a neighbor base station from a candidate neighbor base station set based at least in part on comparing neighbor base station waveform capabilities of the neighbor base station set. For example, if a first neighbor base station supports a higher waveform capability (e.g., OFDM waveform on wideband BWP) than a second neighbor base station, UE 120 may select and / or prioritize the first neighbor base station. Additionally or alternatively, UE 120 may select and / or prioritize a first neighbor base station that supports a larger number of waveforms that are also supported by UE 120, compared to a second neighbor base station that supports a smaller number of waveforms that are also supported by UE 120. In this way, cell selection may be improved by ensuring that UE 120 selects a neighbor base station 110-2 that is compatible with UE 120 in terms of supported waveform(s).

[0089] As indicated above, Figure 6 are provided as examples. Other examples may differ from those described herein. Figure 6 Examples described.

[0090] Figure 7 is a diagram illustrating another example 700 of a waveform capability indication in accordance with various aspects of the present disclosure. Figure 7 As shown, base station 110 and UE 120 can communicate with each other. In some aspects, base station 110 is a serving base station serving UE 120.

[0091] As indicated by reference numeral 705, UE 120 may transmit, and base station 110 may receive, an indication of one or more waveforms supported by UE 120. As further shown, the one or more waveforms include an OFDM waveform (e.g., for use on a wideband BWP, since OFDM is always available on an initial BWP), an SC-FD waveform, and / or an SC-TD waveform. In some aspects, the indication of the waveform(s) supported by UE 120 may be referred to as UE waveform capabilities, waveform capabilities of the UE, and the like. In some aspects, the indication may further indicate whether the one or more waveforms supported by UE 120 are supported for transmission (TX), for reception (RX), or for both transmission and reception. For example, UE 120 may indicate the above in conjunction with Figure 4 (e.g., one or more waveform capabilities described in conjunction with reference numerals 425, 430, 435, and 440).

[0092] In some aspects, the UE 120 may transmit the UE waveform capabilities in a UE capability report. For example, the UE 120 may transmit the UE waveform capabilities in a UE capability information message associated with the initial network registration, in a UE capability report associated with an RRC procedure, and so on. In some aspects, when the UE 120 is powered on and registered with the network (e.g., the core network, such as via an access and mobility function (AMF) device), the network may inquire about one or more UE capabilities. In this case, the UE 120 may receive a UE capability query from the AMF device (via the base station 110), and may indicate the UE waveform capabilities to the AMF device (via the base station 110) in response to the UE capability query (e.g., in a UE capability information message). In some aspects, the AMF device may transmit a message to the base station 110 to inform the base station 110 of the UE waveform capabilities.

[0093] Additionally or alternatively, UE 120 may transmit UE waveform capabilities to base station 110 in an RRC message. For example, UE 120 may indicate UE waveform capabilities in a UE capability report transmitted in association with an RRC connection establishment procedure. In this case, base station 110 may request a UE capability report, and UE 120 may transmit a UE capability report, which may include UE waveform capabilities. In some aspects, the technique may be used to report UE waveform capabilities when UE 120 is in RRC connected mode and / or associated with executing an RRC procedure to enter RRC connected mode. In some aspects, the technique may be used based at least in part on determining that the UE capability query described above is not performed as part of initial network access.

[0094] Additionally or alternatively, the UE 120 may use a RACH message to indicate the UE waveform capabilities. For example, the base station 110 may indicate (e.g., using RMSI, etc.) a first set of RACH resources (e.g., time, frequency, and / or spatial resources) for a first waveform (e.g., an OFDM waveform) and a second set of RACH resources for a second waveform (e.g., an SC waveform, such as one of an SC-FD waveform or an SC-TD waveform). Additionally or alternatively, the base station 110 may indicate a first set of RACH resources for an OFDM waveform, a second set of RACH resources for an SC-TD waveform, and a third set of RACH resources for an SC-FD waveform. In this case, the UE 120 may use the indication to determine a set of RACH resources to be used for a waveform supported by the UE 120 and the base station 110 (and / or a waveform selected by the UE 120 in the case of multiple matching waveforms), and may transmit a RACH message using the set of RACH resources for the waveform. In this case, base station 110 may determine a waveform to be used for communicating with UE 120 based at least in part on a set of RACH resources via which a RACH message is received from UE 120 and a waveform corresponding to the set of RACH resources (as indicated to UE 120 by base station 110). Additionally or alternatively, UE 120 may explicitly indicate the UE waveform capability in a RACH message, such as RACH MsgA (e.g., in a RACH payload), RACH Msg 3, and / or another RACH message transmitted by UE 120 to base station 110.

[0095] As indicated by reference numeral 710, the base station 110 may determine, based at least in part on the indication, whether the base station 110 is capable of communicating with the UE 120. In some aspects, the base station 110 may determine whether both the UE 120 and the base station 110 have the capability to communicate using the same type of waveform, such as by comparing the base station waveform capabilities with the received UE waveform capabilities. In some aspects, if at least one waveform in the base station waveform capabilities matches a waveform in the UE waveform capabilities, the base station 110 may determine that the UE 120 and the base station 110 are capable of communicating with each other. In this case, the base station 110 may determine at least one waveform to be used for communication from one or more matching waveforms. In some aspects, if none of the waveforms that the base station 110 is capable of using matches the waveform indicated by the UE 120, the base station 110 may determine that the UE 120 and the base station 110 are unable to communicate with each other (e.g., on a wideband BWP). In this case, the base station 110 may refrain from performing network procedures with the UE 120 (e.g., transmitting RMSI, performing RACH procedures, performing RRC procedures, etc.). In some aspects, base station 110 may deny an access request from UE 120 based at least in part on a determination that UE 120 and base station 110 are unable to communicate with each other (eg, over a wideband BWP).

[0096] As indicated by reference numeral 715, base station 110 may selectively communicate with UE 120 using at least one of the one or more waveforms. For example, if base station 110 determines that UE 120 and base station 110 are able to communicate with each other, such communication may occur. Conversely, if base station 110 determines that UE 120 and base station 110 are unable to communicate with each other, such communication may not occur. In some aspects, if base station 110 supports multiple waveforms that are also supported by UE 120, base station 110 may use blind decoding and / or hypothetical detection to attempt to receive or decode communications using one or more of the multiple waveforms.

[0097] By indicating the UE waveform capability that allows the use of a variety of different waveforms (e.g., OFDM waveform, SC-TD waveform, SC-FD waveform, etc.) in a communication system (e.g., an NR system on an FR4 band), network performance may be improved. For example, base station 110 and UE 120 may coordinate the use of waveforms supported by both base station 110 and UE 120. In addition, different waveforms may be selected in different scenarios (such as for different network loads, different UE battery conditions, etc.).

[0098] As indicated above, Figure 7 are provided as examples. Other examples may differ from those described herein. Figure 7 Examples described.

[0099] Figure 88 is a diagram illustrating another example 800 of a waveform capability indication in accordance with various aspects of the present disclosure. Figure 8 As shown, serving base station 110-1 and UE 120 may communicate with each other. In some aspects, serving base station 110-1 may relay UE waveform capabilities of UE 120 to neighbor base station 110-2. In some aspects, UE waveform capabilities may be used by neighbor base station 110-2 to grant or deny network access to UE 120.

[0100] As shown in reference numeral 805, UE 120 may be configured in accordance with the above Figure 7 1. In some aspects, serving base station 110-1 may indicate the one or more waveforms supported by UE 120 via a wired interface with neighbor base station 110-2. Additionally or alternatively, serving base station 110-1 may indicate the one or more waveforms via a wireless interface with neighbor base station 110-2. For example, serving base station 110-1 may indicate the one or more waveforms supported by UE 120 in a manner similar to that described above. As shown in reference numeral 810, serving base station 110-1 may indicate the one or more waveforms supported by UE 120 to neighbor base station 110-2. In some aspects, serving base station 110-1 may indicate the one or more waveforms via a wired interface with neighbor base station 110-2. Additionally or alternatively, serving base station 110-1 may indicate the one or more waveforms via a wireless interface with neighbor base station 110-2. For example, serving base station 110-1 may indicate the one or more waveforms supported by UE 120 in a manner similar to that described above. Figure 5 Indications of UE waveform capabilities may be conveyed using signaling messages in a manner similar to that described (e.g., using fields in the signaling messages or explicit indications in IEs), and / or signals may be scrambled and / or modified to indicate UE waveform capabilities. In some aspects, such techniques for indicating UE waveform capabilities from first base station 110 to second base station 110 may be used when UE 120 is in RRC inactive mode.

[0101] In some aspects, the indication may be transmitted directly between base stations 110. Alternatively, the indication may be transmitted between base stations 110 via an AMF device (e.g., transmitted to one or more base stations 110 within a radio access network (RAN) notification area associated with the AMF device). Additionally or alternatively, when the UE 120 moves to a new RAN notification area (e.g., in RRC idle mode), a first AMF device associated with a previous RAN notification area from which the UE 120 has moved may indicate the UE waveform capability to a second AMF device associated with a new RAN notification area to which the UE 120 has moved. The second AMF device may transmit a message indicating the UE waveform capability to one or more base stations 110 in the new RAN notification area.

[0102] As indicated by reference numeral 815, the neighbor base station 110-2 may admit or deny the UE 120 based at least in part on the UE waveform capabilities (e.g., as part of a handover procedure, as part of a cell selection procedure, as part of a network access procedure, in response to an access request from the UE 120, etc.). In some aspects, the neighbor base station 110-2 may admit or deny the UE 120 based at least in part on the UE waveform capabilities and the neighbor base station waveform capabilities of the neighbor base station 110-2.

[0103] In some aspects, neighbor base station 110-2 may determine whether to grant or deny UE 120 based at least in part on whether neighbor base station 110-2 is able to communicate with UE 120. For example, neighbor base station 110-2 may determine whether both UE 120 and neighbor base station 110-2 have the ability to communicate using the same type of waveform, such as by comparing the received UE waveform capabilities with the neighbor base station waveform capabilities. In some aspects, if at least one waveform in the UE waveform capabilities matches a waveform in the neighbor base station waveform capabilities, neighbor base station 110-2 may determine that UE 120 and neighbor base station 110-2 are able to communicate with each other. In this case, neighbor base station 110-2 may determine at least one waveform to be used for communication from one or more matching waveforms, and / or neighbor base station 110-2 may grant UE 120. In some aspects, if none of the waveforms that UE 120 is capable of using matches a waveform supported by neighbor base station 110-2, neighbor base station 110-2 may determine that UE 120 and neighbor base station 110-2 cannot communicate with each other (e.g., over a wideband BWP). In this case, neighbor base station 110-2 may reject UE 120. In this way, network resources and resources of neighbor base station 110-2 and UE 120 (e.g., processing resources, memory resources, battery power, etc.) may be saved by preventing UE 120 from accessing neighbor base station 110-2 (unless UE 120 and neighbor base station 110-2 have shared waveform compatibility).

[0104] In some aspects, if the neighbor base station 110-2 determines that the UE 120 is to be admitted, the neighbor base station 110-2 may indicate the waveform to be used for communication between the UE 120 and the neighbor base station 110-2. For example, in a handover scenario, after being informed of the UE waveform capabilities by the serving base station 110-1, the neighbor base station 110-2 may indicate to the serving base station 110-1 the waveform to be used for communication between the neighbor base station 110-2 and the UE 120 (e.g., during and / or after the handover). In some aspects, the neighbor base station 110-2 may determine the waveform based at least in part on the UE waveform capabilities and the neighbor base station waveform capabilities (e.g., to determine a compatible waveform, a compatible waveform with the best performance compared to other compatible waveforms, etc.). In some aspects, the neighbor base station 110-2 may indicate the waveform to the serving base station 110-1 in an acknowledgment (ACK) message in response to receiving the UE waveform capabilities from the serving base station 110-1. The serving base station 110-1 may relay the waveform selected and indicated by the neighbor base station 110-2 to the UE 120. UE 120 may subsequently communicate with neighbor base station 110-2 using the waveform (eg, during and / or after handoff). In this manner, resources that would otherwise be wasted attempting to communicate using an incompatible and / or suboptimal waveform may be conserved.

[0105] As indicated above, Figure 8 are provided as examples. Other examples may differ from those described herein. Figure 8 Examples described.

[0106] Fig. 9 is a diagram illustrating another example 900 of a waveform capability indication in accordance with various aspects of the present disclosure. Fig. 9 As shown, base station 110 and UE 120 can communicate with each other. In some aspects, base station 110 is a serving base station serving UE 120.

[0107] As indicated by reference numeral 905, the base station 110 may transmit and the UE 120 may receive a configuration indicating a first set of resources (e.g., time, frequency, and / or spatial resources) to be used for paging messages transmitted using a first waveform (e.g., an OFDM waveform) and a second set of resources to be used for paging messages transmitted using a second waveform (e.g., an SC waveform, such as an SC-FD waveform and / or an SC-TD waveform). Additionally or alternatively, the base station 110 may indicate a first set of resources to be used for paging messages transmitted using an OFDM waveform, a second set of resources to be used for paging messages transmitted using an SC-TD waveform, and a third set of resources to be used for paging messages transmitted using an SC-FD waveform. In this case, the UE 120 may use the indication to determine a set of resources that the UE 120 is to monitor for paging messages transmitted using a waveform supported by the UE 120 (and / or a waveform selected by the UE 120 in the case of multiple matching waveforms), and may use the set of resources for the waveform to monitor to find and / or receive paging messages.

[0108] As indicated by reference numeral 910, the base station 110 may transmit the paging message on one or more resource sets according to the resource sets indicated to the UE 120 in the configuration described above. In some aspects, the base station 110 may determine which resource sets to use to transmit the paging message based at least in part on whether the base station 110 has received an indication of one or more waveforms supported by the UE 120. For example, if the base station 110 has received the UE waveform capabilities of the UE 120, the base station 110 may transmit the paging message only on the resource set(s) corresponding to the waveform(s) supported by the UE 120. Alternatively, if the base station 110 has not received the UE waveform capabilities of the UE 120, the base station 110 may transmit the paging message on all resource sets (e.g., corresponding to all waveforms). In some aspects, if the paging message is an emergency message (e.g., a Public Warning System (PWS) message, a Wireless Emergency Alert (WEA) message, a Commercial Mobile Alert System (CMAS) message, an Earthquake and Tsunami Warning System (ETWS) message, a presidential level alert message, etc.) and / or a message indicating a change in system information, the base station 110 may transmit the paging message on all resource sets (e.g., corresponding to all waveforms) to reduce the possibility of missing such messages.

[0109] In some aspects, different sets of resources corresponding to different waveforms can be associated with different channels. For example, a first set of resources (e.g., for an OFDM waveform) can be associated with a first channel (e.g., a control channel, such as a physical downlink control channel (PDCCH)), and a second set of resources (e.g., for an SC waveform, such as an SC-TD waveform or an SC-FD waveform) can be associated with a second channel (e.g., a data channel, such as a physical downlink shared channel (PDSCH)). Additionally or alternatively, different sets of resources for different waveforms can be configured on a second channel (e.g., a data channel). For example, a set of resources on a data channel can be configured for paging messages using an SC-TD waveform, and another set of resources on the data channel can be configured for paging messages using an SC-FD waveform.

[0110] As indicated by reference numeral 915, the UE 120 may monitor one or more of the indicated resource sets based at least in part on the UE waveform capabilities. For example, the UE 120 may monitor only resource sets corresponding to waveforms supported by the UE 120. In some aspects, if the UE 120 is capable of communicating using multiple waveforms, the UE 120 may select one of the multiple waveforms and may monitor for paging messages only on resource sets corresponding to the selected waveform (e.g., to conserve resources of the UE 120). Alternatively, if the UE 120 is capable of communicating using multiple waveforms, the UE 120 may monitor for paging messages on multiple resource sets corresponding to the multiple waveforms (e.g., to increase the likelihood of successfully receiving the paging message).

[0111] As indicated above, Fig. 9 are provided as examples. Other examples may differ from those described herein. Fig. 9 Examples described.

[0112] Fig.10 is a diagram illustrating an example process 1000 performed, for example, by a UE in accordance with various aspects of the present disclosure. Example process 1000 is an example in which a UE (eg, UE 120, etc.) performs operations associated with waveform capability indication.

[0113] like Fig.10As shown, in some aspects, process 1000 may include receiving an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform (block 1010). For example, a UE (e.g., using receive processor 258, controller / processor 280, memory 282, etc.) may receive an indication of one or more waveforms supported by a base station, as described above. In some aspects, the one or more waveforms include at least one of an OFDM waveform, a SC-FD waveform, or a SC-TD waveform.

[0114] like Fig.10 As further shown, in some aspects, process 1000 may include determining, based at least in part on the indication, whether the UE is able to communicate with the base station (block 1020). For example, the UE (e.g., using controller / processor 280, memory 282, etc.) may determine, based at least in part on the indication, whether the UE is able to communicate with the base station, as described above.

[0115] like Fig.10 As further shown, in some aspects, process 1000 may include selectively communicating with a base station using at least one of the one or more waveforms based at least in part on the determination (block 1030). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may selectively communicate with a base station using at least one of the one or more waveforms based at least in part on the determination, as described above.

[0116] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0117] In a first aspect, the indication further indicates whether the one or more waveforms are supported for transmission, for reception, or for both transmission and reception.

[0118] In the second aspect, alone or in combination with the first aspect, the indication is received in at least one of a physical broadcast channel communication, remaining minimum system information, other system information, a radio resource control message, a medium access control (MAC) control element, downlink control information, or a combination thereof.

[0119] In a third aspect, alone or in combination with one or more of the first and second aspects, the indication is received via a signal that is scrambled or modified to indicate the one or more waveforms.

[0120] In the fourth aspect, alone or in combination with one or more of the first to third aspects, the signal includes at least one of a primary synchronization signal, a secondary synchronization signal, a physical broadcast channel demodulation reference signal, a physical broadcast channel cyclic redundancy check, a reference signal in a synchronization signal block, or a combination thereof.

[0121] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 1000 includes monitoring to find at least one of a first set of synchronization signal blocks transmitted using an OFDM waveform or a second set of synchronization signal blocks transmitted using at least one of an SC-FD waveform or an SC-TD waveform.

[0122] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, process 1000 includes monitoring to find at least one of first remaining minimum system information transmitted using an OFDM waveform or second remaining minimum system information transmitted using at least one of an SC-FD waveform or an SC-TD waveform.

[0123] In the seventh aspect, alone or in combination with one or more of the first to sixth aspects, the PBCH payload indicates the location of at least one of a synchronization signal block or remaining minimum system information transmitted using at least one of an SC-FD waveform or an SC-TD waveform or a second waveform in an OFDM waveform.

[0124] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, process 1000 includes receiving remaining minimum system information indicating a first random access channel (RACH) resource set for an OFDM waveform and a second RACH resource set for at least one of an SC-FD waveform or an SC-TD waveform.

[0125] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the one or more waveforms supported by the UE include at least one of an OFDM waveform, a SC-FD waveform, or a SC-TD waveform.

[0126] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, the one or more waveforms supported by the UE are indicated using at least one of: a UE capability information message associated with an initial network registration, a UE capability report associated with a radio resource control procedure, a random access procedure (RACH) message, or a combination thereof.

[0127] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the one or more waveforms supported by the UE are indicated using a RACH message based at least in part on a resource set used by the UE to transmit the RACH message, wherein a first resource set used for the RACH message indicates an OFDM waveform and a second resource set used for the RACH message indicates at least one of an SC-FD waveform or an SC-TD waveform.

[0128] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, process 1000 includes receiving a configuration indicating a first set of resources to be used for paging messages transmitted using an OFDM waveform and a second set of resources to be used for paging messages transmitted using at least one of an SC-FD waveform or an SC-TD waveform.

[0129] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, process 1000 includes monitoring at least one of the first set of resources or the second set of resources based at least in part on one or more waveforms supported by the UE.

[0130] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the first set of resources is associated with a first channel and the second set of resources is associated with a second channel.

[0131] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the first channel is a control channel and the second channel is a data channel.

[0132] In the sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the base station is a serving base station serving the UE.

[0133] In the seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the base station is a neighbor base station.

[0134] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, process 1000 includes selecting a neighbor base station for handover based at least in part on one or more waveforms supported by the neighbor base station.

[0135] In the nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, the one or more waveforms are beam-specific and the UE is configured to reset at least one of the media access control buffer or the radio link control buffer when the UE switches from the first beam to the second beam.

[0136] although Fig.10 An example block diagram of process 1000 is shown, but in some aspects, process 1000 may include Fig.10Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1000. Additionally or alternatively, two or more blocks of the process 1000 may be executed in parallel.

[0137] Fig.11 is a diagram illustrating an example process 1100, performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 1100 is an example in which a base station (eg, base station 110, etc.) performs operations associated with waveform capability indication.

[0138] like Fig.11 As shown, in some aspects, process 1100 may include transmitting an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform (block 1110). For example, a base station (e.g., using transmit processor 220, controller / processor 240, memory 242, etc.) may transmit an indication of one or more waveforms supported by the base station, as described above. In some aspects, the one or more waveforms include at least one of an OFDM waveform, an SC-FD waveform, or an SC-TD waveform.

[0139] like Fig.11 As further shown, in some aspects, process 1100 may include communicating with a UE using at least one of the one or more waveforms (block 1120). For example, a base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may communicate with a UE using at least one of the one or more waveforms, as described above.

[0140] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0141] In a first aspect, the indication is transmitted in at least one of a physical broadcast channel communication, remaining minimum system information, other system information, a radio resource control message, a medium access control (MAC) control element, downlink control information, or a combination thereof.

[0142] In a second aspect, alone or in combination with the first aspect, the indication is transmitted using a signal that is scrambled or modified to indicate the one or more waveforms.

[0143] In a third aspect, alone or in combination with one or more of the first and second aspects, the signal includes at least one of a primary synchronization signal, a secondary synchronization signal, a physical broadcast channel demodulation reference signal, a physical broadcast channel cyclic redundancy check, a reference signal in a synchronization signal block, or a combination thereof.

[0144] In a fourth aspect, alone or in combination with one or more of the first to third aspects, process 1100 includes transmitting a first set of synchronization signal blocks using an OFDM waveform and transmitting a second set of synchronization signal blocks using at least one of an SC-FD waveform or an SC-TD waveform.

[0145] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 1100 includes transmitting first remaining minimum system information using an OFDM waveform and transmitting second remaining minimum system information using at least one of an SC-FD waveform or an SC-TD waveform.

[0146] In the sixth aspect, alone or in combination with one or more of the first to fifth aspects, the PBCH payload indicates the location of at least one of a synchronization signal block or remaining minimum system information transmitted using at least one of an SC-FD waveform or an SC-TD waveform or a second waveform in an OFDM waveform.

[0147] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, process 1100 includes transmitting remaining minimum system information indicating a first random access channel (RACH) resource set for an OFDM waveform and a second RACH resource set for at least one of an SC-FD waveform or an SC-TD waveform.

[0148] In the eighth aspect, alone or in combination with one or more of the first to seventh aspects, the one or more waveforms supported by the UE include at least one of an OFDM waveform, a SC-FD waveform, or a SC-TD waveform.

[0149] In the ninth aspect, alone or in combination with one or more of the first to eighth aspects, one or more waveforms supported by the UE are indicated using at least one of: a UE capability information message associated with an initial network registration, a UE capability report associated with a radio resource control procedure, a RACH message, a message received from another base station, a message received from an access and mobility function device, or a combination thereof.

[0150] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, one or more waveforms supported by the UE are indicated using a RACH message based at least in part on a resource set used by the UE to transmit the RACH message, wherein a first resource set used for the RACH message indicates an OFDM waveform and a second resource set used for the RACH message indicates at least one of an SC-FD waveform or an SC-TD waveform.

[0151] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, process 1100 includes transmitting an indication of one or more waveforms supported by the UE to a neighbor base station.

[0152] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, one or more waveforms supported by the UE are used by neighbor base stations to grant or deny access to the UE.

[0153] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, process 1100 includes transmitting a configuration indicating a first set of resources to be used for paging messages transmitted using an OFDM waveform and a second set of resources to be used for paging messages transmitted using at least one of an SC-FD waveform or an SC-TD waveform.

[0154] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, process 1100 includes transmitting a paging message on a first set of resources, a second set of resources, or both the first set of resources and the second set of resources based at least in part on whether the base station has received an indication of one or more waveforms supported by the UE.

[0155] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the paging message is transmitted on both the first set of resources or the second set of resources based at least in part on determining that the paging message is an emergency message or a message indicating a change in system information.

[0156] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the first set of resources is associated with a first channel and the second set of resources is associated with a second channel.

[0157] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the first channel is a control channel and the second channel is a data channel.

[0158] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, process 1100 includes receiving an indication of one or more waveforms supported by a neighbor base station; and transmitting an indication of one or more waveforms supported by the neighbor base station to a UE.

[0159] although Fig.11 An example block diagram of process 1100 is shown, but in some aspects, process 1100 may include Fig.11 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1100. Additionally or alternatively, two or more blocks of the process 1100 may be executed in parallel.

[0160] Fig.12 is a diagram illustrating examples of transmitter and receiver architectures for transmitting or receiving different waveforms according to various aspects of the present disclosure.

[0161] like Fig.12 As shown, an SC waveform transmitter capable of transmitting an SC-FD waveform (e.g., a DFT-based waveform) may include a constellation mapping component, a DFT (size is K) component, a frequency mapping component, an FFT (size is N) component, a cyclic prefix insertion component, and a frequency equalization (FE) processing component (e.g., a Tx FE processing component).

[0162] As further shown, an SC waveform transmitter capable of transmitting an SC-TD waveform may include a constellation mapping component, a cyclic prefix insertion component (e.g., to achieve frequency domain equalization (FDE)), an upsampling and pulse shaping component, and a FE processing component (e.g., a Tx FE processing component). It is worth noting that the DFT (size K) component, the frequency modulation component, and the FFT (size N) component may not be used to generate the SC-TD waveform.

[0163] As further shown, an SC waveform receiver capable of receiving an SC-FD waveform (e.g., a DFT-based waveform) may include an FE processing component (e.g., an Rx FE processing component), a cyclic prefix removal component, an FFT (size N) component, a frequency demodulation component, an FDE component, a DFT (size K) component, and a constellation demapping component.

[0164] As further shown, an SC waveform receiver capable of receiving an SC-TD waveform may include a FE processing component (e.g., an RxFE processing component), a downsampling and matched filtering component, a time domain equalization (TDE) component, a cyclic prefix removal component (e.g., to implement FDE), and a constellation demapping component. It is worth noting that a DFT (size K) component, a frequency demapping component, and a FFT (size N) component may not be used to receive an SC-TD waveform.

[0165] As indicated above, Fig.12 are provided as examples. Other examples may differ from those described herein. Fig.12 Examples described.

[0166] 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 may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0167] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented with hardware, firmware, and / or a combination of hardware and software.

[0168] As used herein, satisfying 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., depending on the context.

[0169] It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit the various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes-it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0170] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. The phrase "at least one" quoted in a column of items refers to any combination of these items, including single members. As an example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc and abc, and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other sorting of a, b and c).

[0171] Elements, actions or instructions used herein should not be interpreted as critical or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, combinations of related and non-related items, etc.), and can be used interchangeably with "one or more". In the case of intending to have only one item, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including", etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated.

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: receiving a first indication of one or more waveforms supported by a network entity, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform; determining whether the UE is capable of communicating with the network entity based at least in part on the first indication; as well as selectively communicating with the network entity using at least one of the one or more waveforms based at least in part on the determination, and transmitting a second indication of one or more waveforms supported by the UE, wherein the one or more waveforms supported by the UE include at least one of the OFDM waveform, the SC-FD waveform, or the SC-TD waveform, wherein the one or more waveforms supported by the UE are indicated using at least one of: UE Capability Information messages associated with initial network registration, UE capability reporting associated with radio resource control procedures, Random Access Channel (RACH) message, or A combination thereof, and wherein one or more waveforms supported by the UE are indicated using the RACH message based at least in part on a resource set used by the UE to transmit the RACH message, wherein a first resource set used for the RACH message indicates the OFDM waveform and a second resource set used for the RACH message indicates at least one of the SC-FD waveform or the SC-TD waveform.

2. The method of claim 1, wherein: The first indication further indicates whether the one or more waveforms are supported for transmission, for reception, or for both transmission and reception.

3. The method of claim 1, wherein: The first indication is received in at least one of a physical broadcast channel communication, remaining minimum system information, other system information, a radio resource control message, a medium access control (MAC) control element, downlink control information, or a combination thereof.

4. The method of claim 1, wherein: The first indication is received via a signal that is scrambled or modified to be indicative of the one or more waveforms.

5. The method of claim 4, wherein: The signal includes at least one of a primary synchronization signal, a secondary synchronization signal, a physical broadcast channel demodulation reference signal, a physical broadcast channel cyclic redundancy check, a reference signal in a synchronization signal block, or a combination thereof.

6. The method of claim 1, further comprising monitoring for at least one of: a first set of synchronization signal blocks transmitted using the OFDM waveform or a second set of synchronization signal blocks transmitted using at least one of the SC-FD waveform or the SC-TD waveform.

7. The method of claim 1, further comprising monitoring for at least one of: first remaining minimum system information transmitted using the OFDM waveform or second remaining minimum system information transmitted using at least one of the SC-FD waveform or the SC-TD waveform.

8. The method of claim 1, further comprising receiving a physical broadcast channel (PBCH) payload transmitted using at least one of the SC-FD waveform or the SC-TD waveform or a first waveform in the OFDM waveform, wherein the PBCH payload indicates a location of at least one of a synchronization signal block or remaining minimum system information transmitted using at least one of the SC-FD waveform or the SC-TD waveform or a second waveform in the OFDM waveform.

9. The method of claim 1, further comprising receiving remaining minimum system information indicating a first set of random access channel (RACH) resources for the OFDM waveform and a second set of RACH resources for at least one of the SC-FD waveform or the SC-TD waveform.

10. The method of claim 1, further comprising receiving a configuration indicating a first set of resources to be used for paging messages transmitted using the OFDM waveform and a second set of resources to be used for paging messages transmitted using at least one of the SC-FD waveform or the SC-TD waveform.

11. The method of claim 10, further comprising monitoring at least one of the first set of resources or the second set of resources based at least in part on one or more waveforms supported by the UE.

12. The method of claim 10, wherein: The first set of resources is associated with a first channel and the second set of resources is associated with a second channel.

13. The method of claim 12, wherein: The first channel is a control channel and the second channel is a data channel.

14. The method of claim 1, wherein: The network entity is one of: a serving base station serving the UE, or a neighbor base station.

15. The method of claim 14, further comprising selecting the neighbor base station for handover based at least in part on one or more waveforms supported by the neighbor base station.

16. The method of claim 1, wherein: The one or more waveforms are beam specific, and wherein the UE is configured to reset at least one of a medium access control buffer or a radio link control buffer when the UE switches from a first beam to a second beam.

17. A wireless communication method performed by a network entity, comprising: transmitting a first indication of one or more waveforms supported by the network entity, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform; as well as communicating with a user equipment (UE) using at least one of the one or more waveforms, and receiving a second indication of one or more waveforms supported by the UE, wherein the one or more waveforms supported by the UE include at least one of the OFDM waveform, the SC-FD waveform, or the SC-TD waveform, wherein the one or more waveforms supported by the UE are indicated using at least one of: UE Capability Information messages associated with initial network registration, UE capability reporting associated with radio resource control procedures, Random Access Channel (RACH) message, or A combination thereof, and wherein one or more waveforms supported by the UE are indicated using the RACH message based at least in part on a resource set used by the UE to transmit the RACH message, wherein a first resource set used for the RACH message indicates the OFDM waveform and a second resource set used for the RACH message indicates at least one of the SC-FD waveform or the SC-TD waveform.

18. The method of claim 17, wherein: The first indication is transmitted in at least one of a physical broadcast channel communication, remaining minimum system information, other system information, a radio resource control message, a medium access control (MAC) control element, downlink control information, a signal scrambled or modified to indicate the one or more waveforms, or a combination thereof.

19. The method of claim 17, further comprising transmitting a first set of synchronization signal blocks using the OFDM waveform and transmitting a second set of synchronization signal blocks using at least one of the SC-FD waveform or the SC-TD waveform.

20. The method of claim 17, further comprising transmitting first remaining minimum system information using the OFDM waveform and transmitting second remaining minimum system information using at least one of the SC-FD waveform or the SC-TD waveform.

21. The method of claim 17, further comprising transmitting a physical broadcast channel (PBCH) payload using at least one of the SC-FD waveform or the SC-TD waveform or a first waveform in the OFDM waveform, wherein the PBCH payload indicates a location of at least one of a synchronization signal block or remaining minimum system information transmitted using at least one of the SC-FD waveform or the SC-TD waveform or a second waveform in the OFDM waveform.

22. The method of claim 17, further comprising transmitting remaining minimum system information indicating a first set of random access channel (RACH) resources for the OFDM waveform and a second set of RACH resources for at least one of the SC-FD waveform or the SC-TD waveform.

23. The method of claim 17, further comprising transmitting a configuration indicating a first set of resources to be used for paging messages transmitted using the OFDM waveform and a second set of resources to be used for paging messages transmitted using at least one of the SC-FD waveform or the SC-TD waveform.

24. The method of claim 17, further comprising receiving an indication of one or more waveforms supported by a neighbor base station; and transmitting to the UE an indication of one or more waveforms supported by the neighbor base station.

25. A user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receiving a first indication of one or more waveforms supported by a network entity, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform; determining whether the UE is capable of communicating with the network entity based at least in part on the first indication; as well as selectively communicating with the network entity using at least one of the one or more waveforms based at least in part on the determination, and transmitting a second indication of one or more waveforms supported by the UE, wherein the one or more waveforms supported by the UE include at least one of the OFDM waveform, the SC-FD waveform, or the SC-TD waveform, wherein the one or more waveforms supported by the UE are indicated using at least one of: UE Capability Information messages associated with initial network registration, UE capability reporting associated with radio resource control procedures, Random Access Channel (RACH) message, or A combination thereof, and wherein one or more waveforms supported by the UE are indicated using the RACH message based at least in part on a resource set used by the UE to transmit the RACH message, wherein a first resource set used for the RACH message indicates the OFDM waveform and a second resource set used for the RACH message indicates at least one of the SC-FD waveform or the SC-TD waveform.

26. A network entity for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: transmitting a first indication of one or more waveforms supported by the network entity, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform; as well as communicating with a user equipment (UE) using at least one of the one or more waveforms, and receiving a second indication of one or more waveforms supported by the UE, wherein the one or more waveforms supported by the UE include at least one of the OFDM waveform, the SC-FD waveform, or the SC-TD waveform, wherein the one or more waveforms supported by the UE are indicated using at least one of: UE Capability Information messages associated with initial network registration, UE capability reporting associated with radio resource control procedures, Random Access Channel (RACH) message, or A combination thereof, and wherein one or more waveforms supported by the UE are indicated using the RACH message based at least in part on a resource set used by the UE to transmit the RACH message, wherein a first resource set used for the RACH message indicates the OFDM waveform and a second resource set used for the RACH message indicates at least one of the SC-FD waveform or the SC-TD waveform.

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