Tone reservation for discrete fourier transform spread orthogonal frequency division multiplexing

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) can receive an indication of a mapping scheme for a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) communication, where the mapping scheme indicates one or more gaps of subcarriers, where the one or more gaps are included in a bandwidth of the DFT-s-OFDM communication. The UE can perform the DFT-s-OFDM communication using the mapping scheme. Numerous other aspects are described.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to Indian Patent Application No. 309633, filed on December 22, 2023, entitled “TONE RESERVATION FORDISCRETE FOURIER TRANSFORM SPREAD ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING”, which is assigned to the assignee of this application. The disclosure of the earlier application is considered part of this patent application and is incorporated herein by reference. Technical Field

[0003] All aspects of this disclosure relate to wireless communication in general, and to techniques and apparatus for tone reservation in Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that enable 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 an enhancement set of the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more network nodes that support communication for wireless communication devices, such as user equipment (UE) or multiple UEs. A UE may communicate with network nodes via downlink and uplink communication. A "downlink" (or "DL") refers to the communication link from the network node to the UE, and an "uplink" (or "UL") refers to the communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via local links (e.g., sidelinks (SL), wireless local area network (WLAN) links, and / or wireless personal area network (WPAN) links, etc.).

[0006] The aforementioned multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different UEs to communicate at the city, country, region, and / or global levels. New Radio (NR) (which may be referred to as 5G) is a set of enhancements to the LTE mobile standard issued by 3GPP. NR is designed to better support mobile broadband internet access by: improving spectrum efficiency; reducing costs; improving service; utilizing new spectrum; and better integrating with other open standards by using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the downlink (CP-OFDM), and CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink; and supporting beamforming, Multiple-Input Multiple-Output (MIMO) antenna technologies and carrier aggregation. Further improvements to LTE, NR, and other radio access technologies remain useful as the demand for mobile broadband access continues to increase. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: receiving an indication of a mapping scheme for Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) communication, wherein the mapping scheme indicates one or more gaps in subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and using the mapping scheme to perform the DFT-s-OFDM communication.

[0008] In some aspects, a method of wireless communication performed by a network node includes: sending to a UE an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in a subcarrier, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and using the mapping scheme to perform DFT-s-OFDM communication.

[0009] In some aspects, an apparatus for performing wireless communication at a UE includes: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors being configured to cause the UE to: receive an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and use the mapping scheme to perform DFT-s-OFDM communication.

[0010] In some aspects, an apparatus for wireless communication at a network node includes: one or more memories; and one or more processors coupled to the one or more memories, the one or more processors being configured to cause the network node to: send to a UE an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and use the mapping scheme to perform DFT-s-OFDM communication.

[0011] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and use the mapping scheme to perform DFT-s-OFDM communication.

[0012] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a network node, cause the network node to: send an indication to a UE of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and use the mapping scheme to perform DFT-s-OFDM communication.

[0013] In some aspects, an apparatus for wireless communication includes: components for receiving an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and components for performing DFT-s-OFDM communication using the mapping scheme.

[0014] In some aspects, an apparatus for wireless communication includes: components for transmitting to a UE an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in a subcarrier, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and components for performing DFT-s-OFDM communication using the mapping scheme.

[0015] The entirety of the terms includes methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices and / or processing systems as fully described herein with reference to the accompanying drawings and illustrated therein.

[0016] The features and technical advantages of the examples according to this disclosure have been summarized rather extensively above in order to better understand the detailed description below. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, in both their organization and manner of operation, and the associated advantages, will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the drawings provided is for illustrative and descriptive purposes and not as a definition of limitation of the claims.

[0017] While aspects are described herein by way of example, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-modular components (e.g., end-user equipment, vehicles, communication equipment, computing devices, industrial equipment, retail / shopping devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). The aspects described herein are intended to be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user equipment of various sizes, shapes, and configurations. Attached Figure Description

[0018] To gain a full understanding of the foregoing features of this disclosure, a more specific description of the invention, briefly outlined above, can be obtained by referring to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered as limiting its scope, as other equally valid aspects are permissible in this description. The same reference numerals in different drawings may identify the same or similar elements.

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

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

[0021] Figure 3 This is a diagram illustrating an example decomposed base station architecture according to this disclosure.

[0022] Figure 4 This is a diagram illustrating an example of a mapping scheme for flexible discrete Fourier transform extended orthogonal frequency division multiplexing (DFT-s-OFDM) according to this disclosure.

[0023] Figure 5A A performance graph of the mapping scheme according to this disclosure is illustrated.

[0024] Figure 5B A performance diagram illustrating the tone reservation according to this disclosure is shown.

[0025] Figure 6 This is an illustration of an example of selecting a tone (or subcarrier) for tone reservation according to this disclosure.

[0026] Figure 7 This is a diagram illustrating an example of waveform generation based on the present disclosure, combining flexible DFT-s-OFDM and tone-reserved DFT-s-OFDM.

[0027] Figure 8 This is a diagram illustrating an example of downlink transmission using flexible DFT-s-OFDM and tone reservation according to this disclosure.

[0028] Figure 9 This is an illustration of an example of flexible DFT-s-OFDM and tone reservation for uplink communication by multiple UEs according to this disclosure.

[0029] Figure 10 This is a diagram illustrating an example process performed, for example, at the UE or a device of the UE, according to this disclosure.

[0030] Figure 11 This is a diagram illustrating an example process performed, for example, at a network node or a device of a network node, according to the present disclosure.

[0031] Figure 12 This is a diagram of an example device for wireless communication according to the present disclosure.

[0032] Figure 13 This is a diagram of an example device for wireless communication according to the present disclosure. Detailed Implementation

[0033] In millimeter wave (frequency range 2) and sub-THz (frequency range 4 and above) frequencies, bandwidth increases to over 1 GHz, enabling larger subcarrier spacing (e.g., up to 1 MHz). Larger subcarrier spacing linearly reduces slot duration. Furthermore, at these frequencies, beams become narrower and more directional, tending to reduce the number of working clusters to a single master cluster. Based on these conditions, high reciprocity between the uplink and downlink channels can be assumed. With high reciprocity, network nodes (e.g., gNBs) can estimate the user equipment's (UE) downlink channel response by using a probed reference signal to estimate the UE's uplink channel response. When the UE is in a high signal-to-noise ratio (SNR) state, both the network node and the UE are likely to have high-quality downlink channel estimates, which can then be used in various optimization algorithms.

[0034] Communication in wireless networks (such as 5G or 6G radio access networks (RANs)) can utilize radio resources, such as time or frequency resources. For example, communication can be transmitted over multiple subcarriers in the frequency domain and multiple symbols in the time domain. Waveforms can be used to transmit communication. One type of waveform is the Orthogonal Frequency Division Multiplexing (OFDM) waveform, and an example of an OFDM waveform is the Discrete Fourier Transform (DFT) Extended OFDM (DFT-s-OFDM) waveform. In a conventional OFDM system, incoming symbols (for transmission) are directly mapped to subcarriers. However, in a DFT-s-OFDM system, a transform (e.g., DFT) pre-decoding step is performed before mapping the transformed symbols to each subcarrier. The transmitter can then perform an inverse Fast Fourier Transform (IFFT) operation on these subcarriers and insert a cyclic prefix for transmission. Compared to conventional OFDM, DFT-s-OFDM offers increased bandwidth and a reduced peak-to-average power ratio (PAPR). Specifically, the reduced PAPR (and the ability of DFT-s-OFDM to provide low-complexity phase noise reduction) makes DFT-s-OFDM desirable for the higher frequency range (as described above).

[0035] Wireless networks, specifically beamforming wireless networks (e.g., frequency ranges 2 and 4), can consume significant power during operation. Reducing power consumption in such wireless networks can be beneficial. The combination of high reciprocity and narrower / more directional beams in higher frequency ranges can provide a reliable identification of specific subcarriers or groups of subcarriers that offer below-threshold capacity (e.g., quantified by signal-to-interference-plus-noise ratio (SINR), data throughput, received power, etc.), which may lead to increased power usage on these subcarriers or groups of subcarriers for a given capacity. Transmitting waveforms over a bandwidth that includes one or more of these specific subcarriers may suboptimally utilize the transmit power budget, as the waveforms are transmitted on the specific subcarriers as well as on subcarriers that may perform better than the specific subcarriers.

[0036] One technique for reducing energy consumption in wireless networks (specifically, networks using higher frequency ranges) is to reserve certain tones (such as subcarriers or groups of subcarriers) so that these tones are not used to carry signals. This allows the transmitter to save power that would otherwise be used for transmitting tones. For example, the tones can be selected from subcarriers with low capacity, as described above. Thus, signal capacity can be essentially maintained while reducing transmission power. Reserved tones can be directly mapped to subcarriers for transmission in OFDM. However, in DFT-s-OFDM, introducing gaps in the frequency domain mapping can increase PAPR, thereby offsetting the desirable quality advantages of DFT-s-OFDM. Different techniques for mapping reserved tones of the DFT extended output for IFFT transform and transmission can lead to different PAPR effects in different scenarios. Therefore, a fixed technique for tone reservation in DFT-s-OFDM waveforms (where the same technique for mapping is used in all channel conditions) may provide suboptimal PAPR performance in some scenarios.

[0037] This disclosure relates in general to tone reservations for DFT-s-OFDM. In some aspects, a transmitter (such as a UE or network node) may receive or identify an indication of a mapping scheme for DFT-s-OFDM communication (i.e., communication transmitted using a DFT-s-OFDM waveform). The mapping scheme may indicate one or more gaps in data subcarriers. The transmitter may use the mapping scheme to transmit communication. For example, the transmitter may perform an IFFT transform on a set of subcarriers that has been adjusted according to the mapping scheme. In some aspects, the mapping scheme may be selected from several different mapping schemes, such as truncated mapping schemes, gap-filling mapping schemes, or gap-shifting mapping schemes (defined elsewhere herein).

[0038] The aforementioned tone reservations can provide a reduced PAPR and thus offer improved performance for DFT-s-OFDM waveforms. The number or ratio of reserved tones can affect the channel's PAPR. For example, as the number or ratio of reserved tones increases, the impact on PAPR may increase because tone reservations may introduce gaps in resource allocation, thereby increasing the DFT-s-OFDM PAPR. Without considering these gaps, the benefits of DFT-s-OFDM may be reduced due to the increased PAPR.

[0039] Various aspects of this disclosure relate to specific implementations of tone reservation in conjunction with DFT-s-OFDM waveform generation. For example, the mapping scheme described above can provide adjustments to DFT-s-OFDM waveform generation to reduce PAPR in conjunction with specific implementations of tone reservation. Gap between data subcarriers (as described above) can include or correspond to one or more reserved tones. For example, gap between data subcarriers can provide tones in the gaps to be reserved (e.g., by not carrying data and / or pilots). The transmitter can perform waveform generation using the indicated or determined mapping scheme and reserving certain tones (which may correspond to gaps that can be resolved via truncation, null shift mapping, or null fill mapping). Some techniques described herein also provide compression of signaling indicating which subcarriers (or tones) will be reserved.

[0040] The aspects of this disclosure can be used to achieve one or more of the following potential advantages. In some aspects, PAPR performance under different conditions is improved by providing flexible gaps in DFT-s-OFDM waveform generation to accommodate different conditions through signaling notification and / or using a selected mapping scheme (referred to as flexible DFT-s-OFDM). PAPR and power consumption are reduced by implementing tone reservation (e.g., in conjunction with the mapping scheme). For example, a PAPR reduction of approximately 3 dB can be achieved. The overhead of network signaling for reserving tones or subcarriers is reduced by compressing the signaling indicating which subcarriers (or tones) will be reserved.

[0041] Various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Those skilled in the art will appreciate that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods practiced using structures, functionalities, or structures and functionalities other than or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of the claims.

[0042] Various devices and techniques will now be used to illustrate several aspects of a telecommunications system. These devices and techniques will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively, “elements”). These elements may be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the system as a whole.

[0043] Although terms generally associated with 5G or New Radio (NR) Radio Access Technology (RAT) may be used herein to describe aspects, aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or 5G and later (e.g., 6G) RATs.

[0044] Figure 1This is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, or may include elements of a 5G (e.g., NR) network and / or elements of a 4G (e.g., LTE) network, etc. The wireless network 100 may include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), one or more UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other entities. Network node 110 is a network node that communicates with UE 120. As shown, network node 110 may include one or more network nodes. For example, network node 110 can be an aggregated network node, meaning that an aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). As another example, network node 110 can be a decomposed network node (sometimes referred to as a decomposed base station), meaning that network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0045] In some examples, network node 110 is or includes network nodes such as RU that communicate with UE 120 via a radio access link. In some examples, network node 110 is or includes network nodes such as DU that communicate with other network nodes 110 via a fronthaul or midhaul link. In some examples, network node 110 is or includes network nodes such as CU that communicate with other network nodes 110 via a midhaul link or with the core network via a backhaul link. In some examples, network node 110 (such as aggregated network node 110 or decomposed network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. Network node 110 may include, for example, NR base stations, LTE base stations, Node Bs, eNBs (e.g., in 4G), gNBs (e.g., in 5G), access points, Transmit / Receive Points (TRPs), DUs, RUs, CUs, network mobility elements, core network nodes, network elements, network equipment, RAN nodes, or combinations thereof. In some examples, network nodes 110 can interconnect with each other or with one or more other network nodes 110 in the wireless network 100 using any suitable transport network through various types of fronthaul interfaces, midhaul interfaces, and / or backhaul interfaces (such as direct physical connections, air interfaces, or virtual networks).

[0046] In some examples, network node 110 may provide communication coverage for a specific geographic area. In the 3rd Generation Partnership Project (3GPP), depending on the context of terminology use, the term "cell" may refer to the coverage area of ​​network node 110 and / or the network node subsystem serving that coverage area. Network node 110 may provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell may cover a relatively large geographic area (e.g., with a radius of several kilometers) and may allow unrestricted access by UE 120 with a service subscription. A picocell may cover a relatively small geographic area and may allow unrestricted access by UE 120 with a service subscription. A femtocell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UE 120 associated with the femtocell (e.g., UE 120 in a Closed Subscriber Group (CSG)). Network node 110 used for macrocells may be referred to as a macro network node. Network node 110 used for picocells may be referred to as a pico network node. The network node 110 used for femtocells can be referred to as a femtocell network node or a home network node. Figure 1 In the example shown, network node 110a may be a macro network node for macro cell 102a, network node 110b may be a pico network node for pico cell 102b, and network node 110c may be a femto network node for femto cell 102c. Network nodes may support one or more (e.g., three) cells. In some examples, the cells may not necessarily be stationary, and the geographical area of ​​the cells may move depending on the location of the mobile network node 110 (e.g., a mobile network node).

[0047] In some aspects, the term "base station" or "network node" may refer to an aggregated base station, a decomposed base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, "base station" or "network node" may refer to a CU, DU, RU, a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, or a combination thereof. In some aspects, the term "base station" or "network node" may refer to a device configured to perform one or more functions (such as those described herein in conjunction with network node 110). In some aspects, the term "base station" or "network node" may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of multiple different devices (which may be located in the same geographical location or different geographical locations) may be configured to perform at least a portion of a function, or to repeatedly perform at least a portion of that function, and the term "base station" or "network node" may refer to any one or more of these different devices. In some aspects, the term "base station" or "network node" may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions can be instantiated on a single device. In some aspects, the term "base station" or "network node" may refer to one base station function rather than another. In this way, a single device can include more than one base station.

[0048] Wireless network 100 may include one or more relay stations. A relay station is a network node that can receive data transmissions from upstream nodes (e.g., network node 110 or UE 120) and transmit data to downstream nodes (e.g., UE 120 or network node 110). A relay station may be a UE 120 that can relay transmissions to other UE 120s. Figure 1 In the example shown, network node 110d (e.g., a relay network node) can communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between network node 110a and UE 120d. The network node 110 for relay communication may be referred to as a relay station, relay base station, relay network node, relay node, repeater, etc.

[0049] Wireless network 100 can be a heterogeneous network, comprising different types of network nodes 110, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, etc. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different effects on interference in wireless network 100. For example, macro network nodes may have high transmit power levels (e.g., 5 watts to 40 watts), while pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 watts to 2 watts).

[0050] Network controller 130 may be coupled to or communicate with network node set 110, and may provide coordination and control for these network nodes 110. Network controller 130 may communicate with network nodes 110 via a backhaul or midhaul link. Network nodes 110 may also communicate directly with each other, or indirectly via a wireless or wired backhaul link. In some aspects, network controller 130 may be a CU or core network device, or may include a CU or core network device.

[0051] UE 120 may be distributed throughout the wireless network 100, and each UE 120 may be stationary or mobile. UE 120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 may be a cellular phone (e.g., a smartphone), 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smartwatch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, a UE function of a network node, and / or any other suitable device configured to communicate via wireless or wired media.

[0052] Some UEs 120 may be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, unmanned aerial vehicles, remote devices, sensors, instruments, monitors, and / or location tags that can communicate with network nodes, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet of Things (IoT) devices and / or may be implemented as NB-IoT (Narrowband IoT) devices. Some UEs 120 may be considered customer premises equipment. UEs 120 may be housed within a housing containing components such as processor components and / or memory components. In some examples, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0053] Generally, any number of wireless networks 100 can be deployed in a given geographical area. Each wireless network 100 can support a specific RAT and can operate on one or more frequencies. A RAT may be referred to as a radio technology, air interface, etc. A frequency may be referred to as a carrier, frequency channel, etc. Each frequency in a given geographical area can support a single RAT to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0054] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using network node 110 as an intermediary device to communicate with each other). 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, or vehicle-to-pedestrian (V2P) protocols) and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by network node 110.

[0055] Devices in Wireless Network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices in Wireless Network 100 can communicate using one or more operating frequency bands. In 5G NR, two initial operating frequency bands have been designated as frequency ranges FR1 (410MHz to 7.125GHz) and FR2 (24.25GHz to 52.6GHz). It should be understood that although a portion of FR1 is greater than 6GHz, FR1 is generally (interchangeably) referred to as the “sub-6GHz” band in various documents and articles. Similar naming issues sometimes occur with FR2, which is generally (interchangeably) referred to as the “millimeter wave” band in documents and articles, although this is different from the Extremely High Frequency (EHF) band (30GHz to 300GHz) designated as a “millimeter wave” band by the International Telecommunication Union (ITU).

[0056] The frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR studies have identified the operating bands used for these mid-band frequencies as the frequency range designation FR3 (7.125 GHz to 24.25 GHz). Bands falling within FR3 can inherit FR1 and / or FR2 characteristics, thus effectively extending the features of FR1 and / or FR2 to mid-band frequencies. Furthermore, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating frequency bands have been identified as the frequency range designations FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0057] Considering the examples above, unless otherwise specifically stated, it should be understood that if the term "below 6 GHz" is used herein, it can broadly refer to frequencies below 6 GHz, within FR1, or including intermediate frequency bands. Furthermore, unless otherwise specifically stated, it should be understood that if the term "millimeter wave" is used herein, it can broadly refer to frequencies that can include intermediate frequency bands, within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or within the EHF band. Modifications to frequencies included in these operating frequency bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) are contemplated, and the techniques described herein are applicable to those modified frequency ranges.

[0058] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may: receive an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and use the mapping scheme to perform DFT-s-OFDM communication. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0059] In some respects, network node 110 may include communication manager 150. As described in more detail elsewhere herein, communication manager 150 may: send to the UE an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and use the mapping scheme to perform DFT-s-OFDM communication. Additionally or alternatively, communication manager 150 may perform one or more other operations described herein.

[0060] As indicated above, Figure 1 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 1 The examples described are different.

[0061] Figure 2 This is a diagram illustrating example 200 of communication between network node 110 and UE 120 in a wireless network 100 according to this disclosure. Network node 110 may be equipped with antenna sets 234a to 234t, such as... T One antenna ( T ≥1). UE 120 may be equipped with antenna sets 252a to 252r, such as R One antenna ( R ≥1). Network node 110 of Example 200 includes one or more radio frequency components, such as antenna 234 and modem 232. In some examples, network node 110 may include an interface, communication components, or another component that facilitates communication with UE 120 or another network node. Some network node 110 may not include radio frequency components that facilitate direct communication with UE 120, such as one or more CUs or one or more DUs.

[0062] At network node 110, transmitting processor 220 can receive data from data source 212 intended for use by UE 120 (or UE set 120). Transmitting processor 220 can select one or more modulation and decoding schemes (MCS) for UE 120 based at least in part on one or more channel quality indicators (CQIs) received from UE 120. Network node 110 can process (e.g., encode and modulate) the data for UE 120 based at least in part on the MCS selected for UE 120 and can provide data symbols for UE 120. Transmitting processor 220 can process system information (e.g., semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling) and provide overhead symbols and control symbols. Transmitting processor 220 can generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols where applicable, and can process a set of output symbol streams (e.g., T The output symbol streams are provided to the corresponding set 232 of modems (e.g., ...). TEach modem 232a to 232t can be used to process a corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. For example, each output symbol stream can be provided to a modulator component (MOD) of modem 232. Each modem 232 can use a corresponding modulator component to process the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 can also use a corresponding modulator component to process the output sample stream (e.g., convert to analog, amplify, filter, and / or up-convert) to obtain a downlink signal. Modems 232a to 232t can be used via a corresponding set of antennas 234 (e.g., T A collection of downlink signals (e.g., antennas 234a to 234t) is used to transmit downlink signals. T (One downlink signal).

[0063] At UE 120, the antenna set 252 (shown as antennas 252a to 252r) can receive downlink signals from network node 110 and / or other network nodes 110 and can transmit the set of received signals (e.g., R The received signals) are provided to the modem in a set of 254 (e.g., R Each modem 254 (shown as modems 254a to 254r) may receive a signal. For example, each received signal may be provided to a demodulator component (shown as DEMOD) of modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, down-convert, and / or digitize) the received signal to obtain an input sample. Each modem 254 may use a demodulator component to further process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 may obtain the received symbols from modem 254, perform MIMO detection on the received symbols where applicable, and provide the detected symbols. Receiver processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for UE 120 to data sink 260, and provide the decoded control information and system information to controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine parameters such as the Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), and / or CQI. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0064] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, for example, in a core network. Network controller 130 may communicate with network node 110 via communication unit 294.

[0065] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include one or more antenna panels, one or more antenna groups, one or more collections of antenna elements, and / or one or more antenna arrays, etc., or may be included within one or more antenna panels, one or more antenna groups, one or more collections of antenna elements, and / or one or more antenna arrays, etc. Antenna panels, antenna groups, collections of antenna elements, and / or antenna arrays may include one or more antenna elements (within a single housing or multiple housings), collections of coplanar antenna elements, collections of non-coplanar antenna elements, and / or coupled to one or more transmitting and / or receiving components (such as...). Figure 2 One or more antenna elements (one or more components in a )

[0066] On the uplink, at UE 120, the transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 can generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 can be pre-decoded by the TX MIMO processor 266 where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to network node 110. In some examples, the modem 254 of UE 120 may include a modulator and demodulator. In some examples, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to execute this document (e.g., reference). Figures 4 to 13 ( ) any aspect of the methods described in the method.

[0067] At network node 110, uplink signals from UE 120 and / or other UEs may be received by antenna 234, processed by modem 232 (e.g., demodulator component of modem 232 (shown as DEMOD)), detected by MIMO detector 236, and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Network node 110 may include communication unit 244 and may communicate with network controller 130 via communication unit 244. Network node 110 may include scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communication. In some examples, modem 232 of network node 110 may include modulator and demodulator. In some examples, network node 110 includes transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to execute this document (e.g., reference). Figures 4 to 13 ( ) any aspect of the methods described in the method.

[0068] The controller / processor 240 of network node 110, the controller / processor 280 of UE 120 and / or Figure 2 Any other component may perform one or more techniques associated with tone reservation, as described in more detail elsewhere herein. For example, the controller / processor 240 of network node 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component that can execute or direct, for example Figure 10 Process 1000 Figure 11 The operation of process 1100 and / or other processes as described herein. Memory 242 and memory 282 may store data and program code for network node 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, these one or more instructions may cause one or more processors, UE 120 and / or network node 110 to perform or direct, for example, when executed by one or more processors of network node 110 and / or UE 120 (e.g., directly, or after compilation, transformation and / or interpretation). Figure 10 Process 1000 Figure 11The operation of process 1100 and / or other processes as described herein. In some examples, the execution instructions may include run instructions, transform instructions, compile instructions and / or interpret instructions, etc.

[0069] In some aspects, UE 120 includes: components for receiving an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and / or components for performing DFT-s-OFDM communication using the mapping scheme. Components for UE 120 to perform the operations described herein may include, for example, one or more of a communication manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0070] In some aspects, network node 110 includes: components for transmitting to the UE an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and / or components for performing DFT-s-OFDM communication using the mapping scheme. Components for the network node to perform the operations described herein may include, for example, one or more of the following: communication manager 150, transmit processor 220, TXMIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller / processor 240, memory 242, or scheduler 246.

[0071] In some respects, a single processor can perform all the functions described as being performed by that one or more processors. In other respects, the one or more processors can jointly perform a set of functions. For example, a first group(s) of the one or more processors can perform a first function described as being performed by that one or more processors, and a second group(s) of the one or more processors can perform a second function described as being performed by that one or more processors. The first group and the second group of processors can be the same group of processors or can be different groups of processors. The reference to "one or more processors" should be understood as referring to a combination of functions. Figure 2 Any one or more processors described. The reference to "one or more memories" should be understood to refer to any one or more memories of the corresponding device, such as those in conjunction with... Figure 2The memory described. For example, a function described as being performed by one or more memories can be performed by the same subset of the one or more memories or by different subsets of the one or more memories.

[0072] Although Figure 2 The boxes in the diagram are illustrated as different components, but the functions described above with respect to these boxes may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0073] As indicated above, Figure 2 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 2 The examples described are different.

[0074] The deployment of communication systems such as 5G NR systems can be arranged in a variety of ways using various components or parts. In a 5G NR system or network, network nodes, network entities, network mobility elements, RAN nodes, core network nodes, network elements, base stations, or network equipment can be implemented in either a converged or decomposed architecture. For example, a base station (such as a Node B (NB), evolved NB (eNB), NR base station, 5G NB, access point (AP), TRP, or cell, etc.) or one or more units (or components) performing base station functionality can be implemented as a converged base station (also known as a standalone base station or monolithic base station) or a decomposed base station. A "network entity" or "network node" can refer to a decomposed base station or one or more units of a decomposed base station (such as one or more CUs, one or more DUs, one or more RUs, or combinations thereof).

[0075] Aggregated base stations (e.g., aggregated network nodes) can be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or cell). Decomposed base stations (e.g., decomposed network nodes) can be configured to utilize a protocol stack that is physically or logically distributed across two or more cells (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, the CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed across one or more other network nodes. DUs may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU can also be implemented as a virtual cell, such as a Virtual Central Unit (VCU), a Virtual Distributed Unit (VDU), or a Virtual Radio Unit (VRU), etc.

[0076] Base station type operation or network design can take into account the aggregation characteristics of base station functionality. For example, decomposed base stations can be utilized in IAB networks, Open Radio Access Networks (O-RAN (such as network configurations initiated by the O-RAN Alliance)), or Virtualized Radio Access Networks (vRAN, also known as Cloud Radio Access Networks (C-RAN)) to facilitate the scaling of communication systems by separating base station functionality into one or more units that can be deployed independently. Decomposed base stations can include functionality implemented across two or more units at various physical locations, as well as functionality virtually implemented for at least one unit, which enables flexibility in network design. Each unit of a decomposed base station can be configured for wired or wireless communication with at least one other unit of the decomposed base station.

[0077] Figure 3 This is an illustration of an example disaggregated base station architecture 300 according to the present disclosure. The disaggregated base station architecture 300 may include a CU 310, which may communicate directly with the core network 320 via a backhaul link, or indirectly with the core network 320 via one or more disaggregated control units (such as near-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a Service Management and Orchestration (SMO) framework 305, or both). The CU 310 may communicate with one or more DUs 330 via a corresponding midhaul link (such as via an F1 interface). Each DU 330 may communicate with one or more RUs 340 via a corresponding fronthaul link. Each RU 340 may communicate with one or more UEs 120 via a corresponding radio frequency (RF) access link. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0078] Each unit in the cells (including CU 310, DU 330, RU 340), as well as the near-RT RIC 325, non-RT RIC 315, and SMO frame 305, may include or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via wired or wireless transmission media. Each unit in the cell, or an associated processor or controller providing instructions to one or more communication interfaces of the corresponding unit, may be configured to communicate with one or more units in other cells via transmission media. In some examples, each unit in the cell may include a wired interface and a wireless interface configured to receive signals or transmit signals to one or more units in other cells via a wired transmission media, and the wireless interface may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive signals or transmit signals to one or more units in other cells via a wireless transmission media, or both.

[0079] In some aspects, the CU 310 can host one or more higher-level control functions. Such control functions may include Radio Resource Control (RRC) functions, Packet Data Convergence Protocol (PDCP) functions, or Service Data Adaptation Protocol (SDAP) functions, etc. Each control function can be implemented using an interface configured to signal to other control functions hosted by the CU 310. The CU 310 can be configured to handle user plane functions (e.g., Central Unit-User Plane (CU-UP) functions), control plane functions (e.g., Central Unit-Control Plane (CU-CP) functions), or combinations thereof. In some implementations, the CU 310 can be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units can communicate bidirectionally with the CU-CP units via an interface such as an E1 interface. The CU 310 can be implemented to communicate with the DU 330 for network control and signaling purposes, as needed.

[0080] Each DU 330 may correspond to a logical unit comprising one or more base station functions for controlling the operation of one or more RU 340s. In some aspects, the DU 330 may host one or more of the Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and one or more high physical (PHY) layers, at least in part, according to functional splits (such as those defined by 3GPP). In some aspects, the one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, and modulation and demodulation, etc. In some aspects, the DU 330 may also host one or more low PHY layers, such as those implemented by one or more modules for Fast Fourier Transform (FFT), Inverse FFT (iFFT), Digital Beamforming, or Physical Random Access Channel (PRACH) extraction and filtering, etc. Each layer (which may also be referred to as a module) may be implemented using an interface configured to communicate signals with other layers (and modules) hosted by the DU 330 or with control functions hosted by the CU 310.

[0081] Each RU 340 can implement low-level functionality. In some deployments, an RU 340 controlled by a DU 330 can correspond to a logical node that hosts RF processing functions or low-PHY layer functions, such as performing FFT, performing iFFT, digital beamforming, or PRACH extraction and filtering, based on function splitting (e.g., function splitting defined by 3GPP) (such as low-level function splitting). In such architectures, each RU 340 can be operated to handle over-the-air (OTA) communications with one or more UEs 120. In some specific implementations, the real-time and non-real-time aspects of control plane and user plane communications with the RU 340 can be controlled by the corresponding DU 330. In some scenarios, this configuration allows each DU 330 and CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.

[0082] The SMO framework 305 can be configured to support RAN deployment and provisioning of both non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO framework 305 can be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via operation and maintenance interfaces such as the O1 interface. For virtualized network elements, the SMO framework 305 can be configured to interact with cloud computing platforms such as the Open Cloud (O-Cloud) platform 390 to perform network element lifecycle management (such as instantiating virtualized network elements) via cloud computing platform interfaces such as the O2 interface. Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, non-RT RIC 315, and near-RTTRIC 325. In some specific implementations, the SMO framework 305 may communicate with the hardware aspects of the 4G RAN, such as the Open eNB (O-eNB) 311, via the O1 interface. Additionally, in some implementations, the SMO framework 305 can communicate directly with each of one or more RUs 340 via a corresponding O1 interface. The SMO framework 305 may also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305.

[0083] The non-RT RIC 315 can be configured to include logical functions that enable non-real-time control and optimization of RAN elements and resources, including AI / ML workflows for model training and updates, or policy-based guidance for applications / features in the near-RT RIC 325. The non-RT RIC 315 can be coupled to or communicate with the near-RT RIC 325, such as via an A1 interface. The near-RT RIC 325 can be configured to include logical functions that enable near real-time control and optimization of RAN elements and resources via an interface, such as an E2 interface, connecting one or more CU 310s, one or more DU 330s, or both, and O-eNBs to the near-RT RIC 325.

[0084] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. This information can be utilized by the near-RT RIC 325 and may be received from non-network data sources or network functions at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns in performance and employ AI / ML models to perform corrective actions via the SMO framework 305 (such as reconfiguration via the O1 interface) or via the creation of RAN management policies (such as A1 interface policies).

[0085] As indicated above, Figure 3 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 3 The examples described are different.

[0086] Figure 4 Examples 400, 405 and 410 illustrate mapping schemes for flexible DFT-s-OFDM according to this disclosure. Figure 5A Performance figures 500 illustrate some mapping schemes according to the mapping schemes of this disclosure. Figure 5B A performance diagram 525 illustrating the tone reservation according to this disclosure is shown. Figure 4In the examples, the DFT output (including multiple subcarriers) is illustrated by diagonal shading. The shifts in each of Examples 405 and 410 are illustrated by reference numerals 415 and 420, respectively. The “X” in each of the shift examples 405 and 410 indicates the gap introduced by the shift. The “X” in Example 400 indicates a truncated subcarrier / tone. For example, the gap may include one or more subcarriers. The bandwidth 425 of the DFT-s-OFDM communication (e.g., a shifted waveform where one or more subcarriers are truncated or shifted) is then subjected to an IFFT transform, as illustrated by reference numeral 430. In each of Examples 400, 405, and 410, the data symbol sets s1 to s2 are... M Perform DFT expansion to generate subcarrier sets S1 to S2 M In each of Examples 400, 405, and 410, S is exemplified. j+1 To S k-1 One or more subcarriers (where one or more subcarriers may include only one subcarrier) are truncated or shifted.

[0087] Example 400 illustrates a truncated mapping scheme. In the truncated mapping scheme, one or more subcarriers S j+1 To S k-1 Data that is truncated and mapped to one or more subcarriers is not shifted. Therefore, the set of subcarriers undergoing the IFFT transformation includes (S1 … S… j S k … S M If tone reservation is used, the truncated subcarrier may include tone-reserved symbols. If tone reservation is not used, the truncated subcarrier may include zero symbols.

[0088] Example 405 illustrates a null-shift bit mapping scheme. In the null-shift bit mapping scheme, one or more subcarriers S j+1 To S k-1 The original position was truncated, and the subcarrier S j+1 To S M The subcarriers are shifted. Therefore, the set of subcarriers undergoing the IFFT transform includes S1 ...S M , which is immediately following S j The gap then begins. If tone reservation is used, the truncated subcarrier may include tone-reserved symbols. If tone reservation is not used, the truncated subcarrier may include zero symbols.

[0089] Example 410 illustrates a vacancy-filling mapping scheme. In this scheme, one or more subcarriers S j+1 To S k-1 The original position was truncated, and the subcarrier S j+1 To S k-1It is moved to the end of the bandwidth of DFT-s-OFDM communication. Therefore, the set of subcarriers undergoing IFFT transformation includes (S1 … S) in sequence. j S k … S M S j+1 … S k-1 If tone reservation is used, the truncated subcarrier may include tone-reserved symbols. If tone reservation is not used, the truncated subcarrier may include zero symbols.

[0090] Different mapping techniques can provide different PAPRs for different sizes of gaps introduced by the shift. Performance Figure 500 illustrates different PAPRs as a function of gap size. The PAPR for cyclic prefix OFDM is indicated by reference numeral 505 and is constant for all gap sizes in this example. The PAPR for continuous DFT-s-OFDM waveforms (which do not include any gaps) is illustrated by reference numeral 510. This is constant for all gap sizes because gaps are not included in continuous DFT-s-OFDM waveforms, which serves as an example of the optimal PAPR for a given DFT-s-OFDM waveform under the conditions of performance Figure 500. The PAPR for the empty-shifting mapping scheme is shown by reference numeral 515, and the PAPR for the empty-filling mapping scheme is shown by reference numeral 520. It can be seen that the empty-shifting mapping scheme can provide a lower (more desirable) PAPR for some gap sizes, and the empty-filling mapping scheme can provide a lower PAPR for other gap sizes. For example, a space-filling mapping scheme can provide a lower PAPR for gap sizes greater than approximately 8% of the bandwidth of DFT-s-OFDM communication, and a space-filling mapping scheme can provide a lower PAPR for gap sizes smaller than approximately 8% of the bandwidth of DFT-s-OFDM communication. This threshold (8%) can vary depending on resource allocation size, channel conditions, modulation and decoding parameters, the start position of the gap, etc. Some of the techniques described herein provide signaling for the mapping schemes, as described below.

[0091] exist Figure 5B In the figures, reference numerals 530 and 535 illustrate the performance gain of TR (at minimum capacity tone) in PAPR (quantized in dB) at various signal-to-noise ratios (SNRs). Reference numeral 530 illustrates the performance gain of rank 1 (i.e., communication with rank indicator 1 indicating one layer), and reference numeral 535 illustrates the performance gain of rank 2 (i.e., communication with rank indicator 2 indicating two layers). The performance gains are for mmWave (e.g., FR2) communication and relative to FR2 communication using crest factor reduction (CFR). As shown, TR (e.g., the implementation described herein) achieves a PAPR performance gain of up to 3 dB relative to CFR at various SNRs.

[0092] As indicated above, Figure 4 , Figure 5A and Figure 5B This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 4 , Figure 5A and Figure 5B The examples described are different.

[0093] Figure 6 This is a diagram illustrating Example 600 of selecting a tone (or subcarrier) for tone reservation according to this disclosure. In Example 600, the horizontal axis represents frequency. The vertical axis represents the values ​​of parameters (such as capacity parameters, energy parameters, or channel power responses) used to select the tone for tone reservation. Thresholds for the parameters are indicated by reference numeral 605. As shown by reference numeral 610, a tone (e.g., a subcarrier) with a parameter value that fails to meet (e.g., below, below, or equal to) the threshold can be selected for reservation. A tone reservation signal may be introduced on the reserved tone prior to the IFFT transform, and one or more mapping schemes described above may be used prior to the IFFT transform to introduce gaps corresponding to the reserved tone. In some aspects, the threshold may be configured such that a certain percentage of the bandwidth of the DFT-s-OFDM communication is selected for tone reservation, such as in combination with Figure 4 As described in Figure 5.

[0094] As indicated above, Figure 6 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 6 The examples described are different.

[0095] Figure 7 This is a diagram illustrating Example 700 generated according to the present disclosure, which combines flexible DFT-s-OFDM and tone-reserved DFT-s-OFDM waveforms. Figure 7 The flexible DFT-s-OFDM method described above combines the above... Figure 4 Defined. The techniques of Example 700 can be applied to uplink or downlink communication. In Example 700, these techniques are applied to downlink communication.

[0096] As shown in Example 700 and by reference numeral 702, a network node may measure one or more UE Probe Reference Signals (SRS) to estimate the uplink channel. As shown by reference numeral 704, a network node may use the uplink channel estimate to estimate the downlink channel (e.g., using the assumption of reciprocity between the uplink and downlink channels). In some aspects, a network node may use the downlink channel estimate to determine one or more subcarrier sets to which tone reservations are to be applied.

[0097] As indicated by reference numeral 706, a network node may determine that tone reservation will be applied to one or more subcarrier sets used for DFT-s-OFDM communication (such as using SINR reported by the UE, uplink channel estimation, other metrics associated with the uplink or downlink channel, network traffic, and / or the amount of data buffered for transmission to the UE). When the network node determines that tone reservation will be applied (reference numeral 708), the network node may then determine which subcarrier sets to select for tone reservation, as generally illustrated by reference numeral 710. In some aspects, the selection of the subcarrier sets may be based at least in part on a default number of tone values ​​712, such as a minimum of 10% of the set of consecutive subcarriers. In some aspects, the selection of the default number of tone values ​​712 may be based at least in part on SINR measurements.

[0098] As indicated by reference numeral 710, in some aspects, the network node may iteratively perform a subcarrier set selection technique until a threshold PAPR value indicated by reference numeral 714 is reached. For example, the network node may use a UE downlink channel estimate, a default number of tones (e.g., subcarriers), and a default PAPR threshold to perform a mapping technique 716 (such as Selective Mapping (SLM) technique, where alternative transmission sequence vectors (e.g., corresponding to the UE downlink channel) are generated from the same data source by multiplying vectors by random or pseudo-random phases). After the multiplication, an IFFT 718 may be performed on the vectors to convert the corresponding signals from the frequency domain to the time domain, and a PAPR value may be determined for each vector in the vectors at reference numeral 720. The PAPR values ​​may be compared with each other at reference numeral 722 by identifying vectors with tone reservations that result in relatively low or minimum PAPR values ​​relative to other vectors. The network node may then determine whether the tone reservation indicated in the identified vectors satisfies the threshold PAPR value indicated by reference numeral 714.

[0099] In some respects, the most executable subcarrier set selection process is... k The next iteration, in which k It is a positive integer, and / or a PAPR value up to the threshold. Additionally or alternatively, a maximum of PAPR calculations can be performed. p The next iteration, in which pIt is a positive integer. For example, if the default value (e.g., an initial value) for the number of subcarrier sets to be reserved for tone reservation is 5%, and the subcarrier set selection output fails to meet the PAPR threshold by applying tone reservation to the minimum 5% of subcarriers, the network node can increase the default value (e.g., increase by a fixed amount, a variable amount, or a fixed rate) and perform SLM again to determine whether reserving an increased number of subcarrier sets (e.g., a minimum of 7%) will meet the PAPR threshold. In some aspects, the PAPR threshold can be modified (e.g., decreased to reduce the number of subcarrier sets to be reserved, or increased to increase the number of subcarrier sets to be reserved) when iterating during the subcarrier selection process. In some aspects, the subcarrier set selection process can be performed with different numbers of tone reservations (as described above) and for different flexible DFT-s-OFDM modes (such as space shift mapping schemes, space filling mapping schemes, or truncation mapping schemes). In some aspects, subcarrier set selection can be performed for a given number or percentage of tone reservations and for different flexible DFT-s-OFDM modes.

[0100] Once a tone reservation satisfying the threshold PAPR value is identified as shown by reference numeral 724, the network node can use the identified tone reservation (indicated by reference numeral 726) and a flexible DFT-s-OFDM mode to remap the modulated and DFT-spread data at reference numeral 728 using the identified tone reservation scheme (e.g., applying tone reservation on the identified subchannel). For example, the network node can insert the optimized tone reservation position and value along with the modulated data into the mapper. For example, if the subcarrier selection process indicates that the lowest 7% of the subcarrier set should be reserved (e.g., in terms of SINR) to satisfy a given PAPR threshold, the modulated data can be mapped only to the top 93% of the subcarrier set (e.g., based on received energy and / or power), while the bottom 7% is reserved. Furthermore, the network node can apply a flexible DFT-s-OFDM mode according to the identified tone reservation scheme. For example, the network node can combine... Figure 4 The description involves shifting one or more subcarriers. A network node can create one or more gaps by shifting one or more subcarriers. For example, to achieve the tone reservation for the channel response illustrated in Figure 5, a network node can create multiple gaps, each gap corresponding to one or more subcarriers (which may include two or more consecutive subcarriers) that have failed to meet the channel response indicated by reference numeral 605. After applying the IFFT at reference numeral 730, the resulting downlink communication can be transmitted to the UE at reference numeral 732.

[0101] The UE can receive downlink communication as an RF signal at reference 734. The UE can use an analog-to-digital converter (ADC) at reference 736, configured with the number of bits shown, to provide a digital output to the UE's digital front-end (DFE) 738. The DFE 738 can perform one or more processing operations. The UE can then apply a Fast Fourier Transform (FFT) algorithm at reference 740 to convert the received signal to the frequency domain and obtain communication.

[0102] In some respects, as indicated by reference numeral 742, the UE may receive information indicating the number of subcarriers for which tone reservations are applied, a flexible DFT-s-OFDM mode (e.g., a mapping scheme), or a combination thereof. For example, a report may indicate that tone reservations will be applied to a minimum of 7% of the subcarriers, and / or may indicate the use of a space-filling mapping scheme for generating communications. Additionally or alternatively, separate signaling may indicate the number of subcarriers and the mapping scheme.

[0103] At reference numeral 744, the UE can use the communication (e.g., data symbols) or the DMRS of the communication to estimate the energy (e.g., power) of the subcarrier set of the channel (e.g., using SINR). After identifying the minimum (e.g., lowest) energy set of the subcarriers (e.g., bottom 7%) at reference numeral 746, the UE can apply a demapping scheme and discard reserved tones at reference numeral 748. For example, if the communication was generated using a null-shift mapping scheme, the UE can apply a denull-shift mapping scheme, or if the communication was generated using a null-filling mapping scheme, the UE can apply a denull-filling mapping scheme. At reference numeral 750, the UE can perform an inverse DFT transform, such as an IFFT transform. At reference numeral 752, the UE can decode the data of the communication.

[0104] As indicated above, Figure 7 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 7 The examples described are different.

[0105] Figure 8 This is a diagram illustrating Example 800, which uses flexible DFT-s-OFDM and tone reservation downlink transmission according to this disclosure. Example 800 includes a network node 110 and a UE 120. In Example 800, network node 110 is a transmitter of communication using DFT-s-OFDM, and UE 120 is a receiver of the communication.

[0106] As shown by reference numeral 805 in the accompanying drawings, in some aspects, UE 120 may transmit and network node 110 may receive (e.g., measure) one or more SRSs. For example, network node 110 may use one or more SRSs to perform uplink channel estimation (such as in...). Figure 7(See reference numeral 702 in the attached figures). As further shown, in some aspects, UE 120 may transmit, and network node 110 may receive, recommendations associated with tone reservation. For example, UE 120 may transmit an indication of the amount of reserved tones (e.g., percentage, quantity) and / or an indication of one or more locations of reserved tones. In some aspects, UE 120 may determine this indication based on channel conditions at UE 120, such as by measuring the downlink channel at UE 120. In some aspects, network node 110 may identify channel information based on information reported by UE 120. For example, network node 110 may identify channel information based on reports indicating the channel power delay distribution and / or frequency domain response at UE 120, thereby saving processing resources that network node 110 would otherwise use to directly perform channel estimation.

[0107] As shown by reference numeral 810 in the attached figure, network node 110 may apply tone reservation to one or more minimum capacity subcarriers. For example, network node 110 may determine whether to apply tone reservation based on channel information (such as channel information estimated by network node 110 or reported by UE 120), SINR of UE 120, etc.

[0108] In some respects, network node 110 can identify one or more minimum capacity subcarriers, such as in combination with Figure 6 and Figure 7 As described. For example, network node 110 may define a default number of tone reservations and values ​​to consider the PAPR impact of a default number of tone reservations and values ​​on a flexible DFT-s-OFDM waveform. Network node 110 may then find the minimum channel energy / capacity subcarrier based on the default number of tone reservations, such as by testing the PAPR impact of each flexible DFT-s-OFDM pattern (mapping scheme) and selecting the optimal pattern suitable for the tone reservation position corresponding to the minimum channel energy / capacity subcarrier. Network node 110 may apply tone reservation optimization (based on the positions identified above) to achieve the optimal PAPR value (where the maximum power constraint is equal to the power of the Physical Downlink Shared Channel (PDSCH) subcarrier), including the impact of flexible DFT-s-OFDM gaps on PAPR. Tone reservation optimization may be determined using machine learning-based algorithms, constrained / unconstrained optimization, test hypothesis iteration, or another optimization method. For example, tone reservation optimization may include clipping the signal, applying an FFT to the clipped signal, and updating the original symbols of the signal with the tone reservation positions using the output of the FFT. In some aspects, tone reservation optimization can be iterative, allowing clipping, the application of clipped signals, and the updating of tone reservation positions to be performed iteratively. Furthermore, minimum tone reservation power constraints (indicating the minimum power required to select a tone as a reserved tone) can be used to improve UE detection.

[0109] As shown by reference numeral 815 in the attached figure, network node 110 can select a mapping scheme from a space shift mapping scheme or a space filling mapping scheme. For example, network node 110 can use the selected mapping scheme to adapt one or more gaps of reserved tones associated with one or more minimum capacity subcarriers. The one or more gaps may include a single gap or multiple gaps. The multiple gaps may differ in size from each other, for example, depending on the relative number of reserved tones included in each of the gaps.

[0110] As shown by reference numeral 820 in the attached figure, network node 110 can recalculate the joint PAPR gain of one or more minimum capacity subcarriers and the selected mapping scheme. Network node 110 can determine whether the amount (e.g., percentage, quantity) of reserved tones should be changed based on the joint PAPR gain. For example, network node 110 can perform actions such as combining the... Figure 7 The threshold PAPR value indicated by reference numeral 714 in the attached figure describes this determination.

[0111] Once network node 110 has identified the minimum capacity subcarriers according to the amount of reserved tone, in some respects, network node 110 can compress information indicating the location of subcarriers associated with tone reservation (e.g., subcarriers selected to carry tone reservation signals), as shown by reference numeral 825. For example, it can be expected that most of the tone reservations are in consecutive locations due to the channel coherence bandwidth of the channel. Network node 110 can save bandwidth by signaling indications of state changes associated with the location. In this context, the state of a location can include "selected as a tone reservation location" or "not a tone reservation location". A state change associated with a given location can indicate that the next location (the next location in frequency) is associated with a state different from that of the given location. For example, consider a vector 1 corresponding to a set of ten locations, where "0" indicates that the location was not selected for tone reservation and "1" indicates that the location was selected for tone reservation: Vector 1: [0 0 1 1 1 1 1 1 0 0].

[0112] In this example, vector 1 can be used to generate vector 2, which indicates the state changes at the second and eighth positions, where "0" indicates no state change at the next position and "1" indicates a state change at the next position. Vector 2: [0 1 0 0 0 0 0 1 0 0].

[0113] Vector 2 can be generated by performing an XOR operation on vector 1: XOR(bit) i-1 , bit i This can be referred to as differential coding of vector 1. Network node 110 can then compress vector 2, such as by using Huffman coding and / or time-domain compression.

[0114] In temporal compression, network node 110 may signal a first vector 1 or vector 2 to UE 120. First vector 1 or vector 2 may represent a first set of positions for tone reservation. At a later time, network node 110 may determine a second vector 1 or vector 2, which may represent a second set of positions for tone reservation. Network node 110 may generate a temporal compression vector, which may represent the differential coding between first vector 1 and second vector 1, or between first vector 2 and second vector 2. For example, the temporal compression vector may include "1" only if the value of the second vector (second vector 1 or second vector 2) differs from the corresponding value of the first vector (first vector 1 or first vector 2, respectively). Network node 110 may generate the temporal compression vector using an XOR operation with respect to first vector 1 / 2 and second vector 1 / 2.

[0115] In Huffman compression (often referred to as Huffman decoding), prefix codes are used to compress a dataset (such as vector 1 or vector 2). Huffman compression uses a variable-length codebook (called a codebook) to encode the source symbols. In some respects, the codebook can be based on an estimated probability or frequency of occurrence for each possible value of the source symbol. For example, for a pair of two consecutive bits including the first and second bits, the codebook and the probability used to derive the encoded value corresponding to the two consecutive bits can be defined by Table 1:

[0116] Table 1

[0117] Using Table 1, the uncoded vector [0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1] can be sent as the coded vector [0 00 1 0 0 0 0 1 1 0], using 5 fewer bits than the uncoded vector. In some respects, network node 110 can compute a difference vector derived from vector (vector 2) that indicates a state change in vector (vector 1) for the position used for tone reservation, where the difference vector indicates a state change in vector 2. For example, network node 110 can compute the difference vector by computing the difference of each XOR of vector 2: diff([XOR( , )==1、XOR( , )==1、XOR( , )==1 etc.]), where i , j and k This indicates the location of the difference in vector 2. Network node 110 can then compress the difference vector using the codebook described above, and can send the compressed difference vector.

[0118] As shown by reference numeral 830 in the accompanying drawings, network node 110 can transmit and UE 120 can receive an indication. In some aspects, this indication may be referred to as tone reservation configuration. In some aspects, this indication may indicate enabling tone reservation. In some aspects, this indication may indicate one or more locations of subcarriers (e.g., reserved tone / subcarriers) for carrying tone reservation signals. For example, the indication may include compressed information indicating the location of the subcarriers, or it may include uncompressed information indicating the location. In some aspects, the indication may indicate the selected or applied mapping scheme (e.g., flexible DFT-s-OFDM mode) via bits. In some aspects, network node 110 may transmit this indication via RRC signaling. In some aspects, network node 110 may transmit this indication via dynamic signaling such as downlink control information (DCI) or MAC signaling such as media access control (MAC) control element (MAC-CE). If network node 110 sends the indication via dynamic signaling, it can use a greater than 0 time slot offset (e.g., K0 time slot offset) between the indication and the corresponding downlink communication (e.g., scheduled by the DCI carrying the indication) to allow UE 120 time to implement the indication. In some aspects, network node 110 can send the indication via dynamic signaling or semi-static (e.g., RRC) signaling based on channel characteristics. For example, network node 110 can use dynamic signaling when the Doppler spread of the channel meets a threshold (e.g., when channel changes may affect the optimal tone reservation position on a relatively short time scale).

[0119] In some respects, UE 120 can determine the location for tone reservation. For example, UE 120 can determine the location for tone reservation based on minimum capacity subcarriers, minimum energy subcarriers, etc. UE 120 can determine this location by estimating the downlink channel using demodulation reference signals (DMRS), received data, etc., as per [the relevant information]. Figure 7 As described. In some respects, UE 120 can use OFDM, which is used only for symbol estimation with the received data, to estimate the downlink channel, which enables a flat frequency domain response to the data.

[0120] As shown by reference numeral 835 in the attached figure, network node 110 can utilize flexible DFT-s-OFDM mode and tone reservation to send communications (e.g., downlink messages). The communications may include PDSCH or another form of communication. For example, network node 110 can generate communications, such as regarding... Figure 7 As described. UE 120 can receive information such as... Figure 7The described communication. For example, UE 120 may discard subcarriers or tones at one or more locations indicated by network node 110 from data symbols received by UE 120, and may demap communication according to a selected mapping scheme. For example, for a vacancy shift mapping scheme, UE 120 may skip configured tone reservation gaps (corresponding to tone reservation positions) and continuously allocate subcarriers. For a vacancy filling mapping scheme, UE 120 may skip tone reservation gaps, move one or more subcarriers from the end of the bandwidth into one or more gaps, and then continuously allocate subcarriers for DFT-s-OFDM communication. For example, UE 120 may skip configured TR gaps and continuously allocate subcarriers after filling edge subcarriers back to the gap index positions. In some aspects, communication may be multiplexed with one or more other channels, such as synchronization signal blocks or channel state information reference signals. In such aspects, tone reservations may be weakened according to the desired SINR (e.g., by reducing the signal power of the symbol by a certain amount). For example, tone reservations may be configured to reduce the impact on any other channels mapped on the same allocation. This may reduce the ability of pitch reservation to decrease PAPR, but may still provide some gain.

[0121] As shown by reference numeral 840 in the accompanying drawings, in some aspects, network node 110 may transmit and UE 120 may receive an indication to enable uplink tone reservation using flexible DFT-s-OFDM mode. In some aspects, this indication may be referred to as tone reservation configuration. For example, network node 110 may determine that uplink tone reservation should be applied. "Uplink tone reservation" may include the transmission of uplink communication using tone reservation. Uplink tone reservation with flexible DFT-s-OFDM may include the transmission of uplink communication using tone reservation, wherein the combination of Figure 4 The mapping scheme described in Figure 5 is used to implement the gaps for tone reservation. In some aspects, the indication shown by reference numeral 830 can indicate the mapping scheme (e.g., a flexible DFT-s-OFDM mode). Additionally or alternatively, the indication shown by reference numeral 840 can indicate one or more locations of reserved tones (where the reserved tones may be located within the gaps). In some aspects, UE 120 can identify the location of the reserved tones according to the indication shown by reference numeral 830 (e.g., the indications shown by reference numerals 830 and 840 may be the same indication). This may be advantageous when reciprocity on the uplink and downlink is high and / or when the indication shown by reference numeral 830 has recently been received.

[0122] As shown by reference numeral 845, UE 120 can apply uplink tone reservation and flexible DFT-s-OFDM mode. For example, UE 120 can insert tone reservation signals at locations indicated as associated with reserved tones. UE 120 can apply mapping schemes as indicated by reference numerals 830 or 840. UE 120 can perform IFFT transforms to generate uplink communication and can transmit uplink communication with reserved tones, as shown by reference numeral 850. Therefore, in some aspects, UE 120 can apply tone reservation at the same locations and using the same flexible DFT-s-OFDM mode as indicated by network node 110. For example, UE 120 can use the same configuration on its uplink physical uplink shared channel or other configurations based on UE 120's uplink parameters (such as uplink allocation, frequency band, rank, waveform, etc.).

[0123] In some aspects, network node 110 can configure tone reservation positions for UE 120 within the gaps between UEs 120. In other aspects, network node 110 can configure tone reservations for UE 120 within the gaps between different UEs 120. In some aspects, network node 110 can signal to a first UE 120 information indicating a first or more positions associated with a reserved tone and a second or more positions associated with a reserved tone. In some aspects, the first or more positions may be within the bandwidth of the first UE 120, and the second or more positions may be within the bandwidth of a second UE 120 different from the first UE 120. Therefore, network node 110 can signal possible tone reservation positions to multiple UEs based on the gaps of each UE and / or based on the gaps of other UEs among the multiple UEs.

[0124] As indicated above, Figure 8 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 8 The examples described are different.

[0125] Figure 9 This is an illustration of Example 900, which illustrates flexible DFT-s-OFDM and tone reservation for uplink communication by multiple UEs according to this disclosure. Example 900 includes a network node 110, a first UE 120, and a second UE 120. Example 900 relates to identifying the location of tone reservations for multiple UEs (in Example 900, the first UE 120 and the second UE 120), and signaling the indication of the location to the multiple UEs. The technology of Example 900 can be applied to multiple UEs, including any number of UEs. The first UE 120 and the second UE 120 are collectively referred to below as "multiple UEs".

[0126] As shown by reference numeral 905 in the accompanying drawings, in some aspects, multiple UEs can transmit and network node 110 can receive (e.g., measure) SRS. For example, the network node can perform uplink and / or downlink channel estimation based on the SRS, as described elsewhere herein.

[0127] As shown by reference numeral 910 in the attached figure, network node 110 can identify the location of reserved tones and flexible DFT-s-OFDM modes. For example, network node 110 can select the location of reserved tones and the mapping scheme for uplink transmission using the location of reserved tones. Network node 110 can select, as about Figures 6 to 8 The described location and mapping scheme. In some aspects, network node 110 may select a location spanning a broadband bandwidth. For example, the broadband bandwidth may include the respective bandwidth of all UEs among a plurality of UEs. As another example, the broadband bandwidth may include the communication bandwidth (e.g., carrier) of network node 110.

[0128] As shown by reference numeral 915 in the attached figure, network node 110 may send an indication of the location and mapping scheme of tone reservations. For example, the indication may indicate a location across a broadband bandwidth. Thus, each UE 120 receiving the indication can identify the appropriate location of the tone reservation within the bandwidth of each UE 120 (which is included in the broadband bandwidth). In some aspects, network node 110 may send the indication to multiple UEs via broadcast signaling. Additionally or alternatively, network node 110 may send the indication to each of the multiple UEs via unicast signaling.

[0129] As shown by reference numeral 920, multiple UEs can apply tone reservation and mapping schemes. For example, each of the multiple UEs can apply in-allocation (i.e., within its own bandwidth allocation) or inter-allocation (i.e., across different UE bandwidth allocations) uplink tone reservation (by inserting tone reservation signals at locations indicated by network node 110) and mapping scheme (by shifting or filling gaps associated with locations according to the mapping scheme). As shown by reference numeral 925, the multiple UEs can use the uplink tone reservation and mapping scheme to transmit uplink communications. Network node 110 can receive these communications based on the locations and mapping schemes. For example, network node 110 can discard subcarriers associated with tone reservations and can demap uplink communications according to a demapping scheme corresponding to the mapping scheme, as described elsewhere herein.

[0130] As indicated above, Figure 9 This is provided as an example. Other examples are available with reference to [the relevant information]. Figure 9 The examples described are different.

[0131] It should be noted that this can be applied without actually including the tone reservation signal in the identified location used for tone reservation. Figures 7 to 9 In this respect, network node 110 can identify low-capacity subcarriers and can be configured with mapping schemes and locations for UE 120 to avoid using low-capacity subcarriers for data transmission.

[0132] Figure 10 This is a diagram illustrating an example process 1000 performed, for example, at a UE or a device of a UE, according to this disclosure. Example process 1000 is an example in which a device or UE (e.g., UE 120) performs operations associated with tone reservation for DFT-s-OFDM.

[0133] like Figure 10 As shown, in some aspects, process 1000 may include receiving an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication (box 1010). For example, the UE (e.g., using...) Figure 12 The receiving component 1202 and / or communication manager 1206 depicted herein may receive an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication, as described above.

[0134] like Figure 10 As further shown, in some aspects, process 1000 may include using a mapping scheme to perform DFT-s-OFDM communication (box 1020). For example, the UE (e.g., using...) Figure 12 The communication manager 1206 depicted in the text can use a mapping scheme to perform DFT-s-OFDM communication, as described above.

[0135] 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 in this document.

[0136] In the first aspect, the mapping scheme is a null shift mapping scheme in which subcarriers are shifted to form one or more gaps.

[0137] In the second aspect, either alone or in combination with the first aspect, the mapping scheme is a gap-filling mapping scheme in which one or more subcarriers are padded to the end of the bandwidth.

[0138] In the third aspect, either alone or in combination with one or more of the first and second aspects, one or more gaps are derived using at least one of the channel response or peak-to-average power ratio.

[0139] In the fourth aspect, alone or in combination with one or more of the first to third aspects, one or more gaps include a first gap and a second gap, wherein the first gap has a first length and the second gap has a second length different from the first length.

[0140] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 1000 includes performing DFT-s-OFDM communication according to a tone reservation configuration.

[0141] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the tone reservation configuration indicates multiple subcarriers for carrying tone reservation signals, and performing DFT-s-OFDM communication also includes receiving DFT-s-OFDM communication and discarding tone reservation signals.

[0142] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the tone reservation configuration indicates multiple subcarriers for carrying tone reservation signals, and performing DFT-s-OFDM communication also includes transmitting DFT-s-OFDM communication including tone reservation signals on the multiple subcarriers.

[0143] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the tone reservation configuration indicates one or more locations in the bandwidth of the set of subcarriers used to carry the tone reservation signal.

[0144] In the ninth aspect, information indicating one or more locations is compressed, either alone or in combination with one or more of the first to eighth aspects.

[0145] In the tenth aspect, information indicating one or more locations, either alone or in combination with one or more of the first to ninth aspects, indicates for a location a state different from that of the next location carrying a tone reservation signal.

[0146] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, process 1000 includes identifying one or more locations of the subcarrier set in the bandwidth.

[0147] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, one or more locations include locations of subcarriers with minimum capacity or energy.

[0148] In the thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the mapping scheme is a space shift mapping scheme, and performing DFT-s-OFDM communication according to the tone reservation configuration also includes skipping one or more gaps and continuously allocating subcarriers for DFT-s-OFDM communication.

[0149] In the fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the mapping scheme is a gap-filling mapping scheme, and performing DFT-s-OFDM communication according to the tone reservation configuration also includes skipping one or more gaps, moving one or more subcarriers from the end of the bandwidth into one or more gaps, and then continuously allocating subcarriers for DFT-s-OFDM communication.

[0150] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the mapping scheme is a gap-filling mapping scheme, and performing DFT-s-OFDM communication according to tone reservation configuration also includes moving one or more subcarriers from one or more gaps to the end of the bandwidth.

[0151] although Figure 10 An example box for process 1000 is shown, but in some respects, it differs from... Figure 10 Compared to the boxes depicted, process 1000 may include additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Additionally or alternatively, two or more boxes in process 1000 may be executed in parallel.

[0152] Figure 11 This is a diagram illustrating an example process 1100 performed, for example, at a network node or a device of a network node, according to the present disclosure. Example process 1100 is an example in which a device or network node (e.g., network node 110) performs operations associated with tone reservations for DFT-s-OFDM.

[0153] like Figure 11 As shown, in some aspects, process 1100 may include sending an indication to the UE of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication (box 1110). For example, a network node (e.g., using...) Figure 13 The transmitting component 1304 and / or the communication manager 1306 depicted herein may transmit to the UE an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication, as described above.

[0154] like Figure 11 As further shown, in some aspects, process 1100 may include using a mapping scheme to perform DFT-s-OFDM communication (box 1120). For example, network nodes (e.g., using...) Figure 13 The communication manager 1306 depicted in the text can use a mapping scheme to perform DFT-s-OFDM communication, as described above.

[0155] 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 in this document.

[0156] In the first aspect, the mapping scheme is a null shift mapping scheme in which subcarriers are shifted to form one or more gaps.

[0157] In the second aspect, either alone or in combination with the first aspect, the mapping scheme is a gap-filling mapping scheme in which one or more subcarriers are padded to the end of the bandwidth.

[0158] In the third aspect, either alone or in combination with one or more of the first and second aspects, one or more gaps are derived using at least one of the channel response or peak-to-average power ratio.

[0159] In the fourth aspect, alone or in combination with one or more of the first to third aspects, one or more gaps include a first gap and a second gap, wherein the first gap and the second gap are non-uniform relative to each other.

[0160] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 1100 includes performing DFT-s-OFDM communication according to a tone reservation configuration.

[0161] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the tone reservation configuration indicates a set of subcarriers carrying tone reservation signals, and performing DFT-s-OFDM communication also includes performing DFT-s-OFDM communication with tone reservation signals on the set of subcarriers.

[0162] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the tone reservation configuration indicates one or more positions of the subcarrier set in the bandwidth.

[0163] In the eighth aspect, information indicating one or more locations is compressed, either alone or in combination with one or more of the first to seventh aspects.

[0164] In the ninth aspect, information indicating one or more positions, either alone or in combination with one or more of the first to eighth aspects, indicates a change in the state of a position from carrying a tone reservation signal to not carrying a tone reservation signal or from not carrying a tone reservation signal to carrying a tone reservation signal.

[0165] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, process 1100 includes identifying one or more positions of a plurality of subcarriers carrying tone reservation signals in the bandwidth.

[0166] In the eleventh aspect, identifying one or more locations, either alone or in combination with one or more of the first to tenth aspects, also includes using the capacity or energy of a subcarrier to identify one or more locations.

[0167] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, process 1100 includes identifying channel information about the link between the network node and the UE, wherein the tone reservation configuration is derived using the channel information.

[0168] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, transmitting the tone reservation configuration also includes transmitting the tone reservation configuration based on channel information or measurements associated with the UE.

[0169] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, process 1100 includes an identification mapping scheme and a tone reservation configuration.

[0170] In the fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, identifying the mapping scheme and tone reservation configuration also includes identifying multiple tone reservations, identifying one or more subcarriers having channel energy or capacity below a threshold for one or more mapping schemes, and using one or more subcarriers to map multiple tone reservations.

[0171] In the sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the plurality of tone reservations are a first number of tone reservations, and identifying the mapping scheme and tone reservation configuration also includes using the first number of tone reservations and the second number of tone reservations and iteratively identifying the mapping scheme and tone reservation configuration based on a peak-to-average power ratio threshold.

[0172] In the seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the tone reservation configuration is a first tone reservation configuration and the UE is a first UE, and the process 1100 includes sending a second tone reservation configuration to a second UE.

[0173] In the eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, process 1100 includes sending a second instruction to the second UE regarding the second mapping scheme.

[0174] although Figure 11 An example box for process 1100 is shown, but in some respects, it differs from... Figure 11 Compared to the boxes depicted, process 1100 may include additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Additionally or alternatively, two or more boxes in process 1100 may be executed in parallel.

[0175] Figure 12 This is a diagram of an example device 1200 for wireless communication according to the present disclosure. Device 1200 may be a UE, or a UE may include device 1200. In some aspects, device 1200 includes a receiving component 1202, a transmitting component 1204, and / or a communication manager 1206 that can communicate with each other (e.g., via one or more buses and / or one or more other components). In some aspects, communication manager 1206 is combined with... Figure 1 The described communication manager 140. As shown, device 1200 can communicate with another device 1208 (such as a UE or a network node (such as a CU, DU, RU or base station)) using receiving component 1202 and transmitting component 1204.

[0176] In some respects, device 1200 can be configured to perform the functions described herein. Figures 4 to 9 One or more operations as described herein. Additionally or alternatively, the apparatus 1200 may be configured to perform one or more processes described herein (such as...). Figure 10 The process 1000) or a combination thereof. In some respects, Figure 12 The illustrated device 1200 and / or one or more components may include a combination Figure 2 One or more components of the described UE. Additionally or alternatively, Figure 12 One or more components shown can be combined Figure 2 Implementation within one or more of the described components. Additionally or alternatively, one or more components in the set of components may be implemented at least partially as software stored in one or more memories. For example, a component (or a portion thereof) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the function or operation of the component.

[0177] Receiver 1202 may receive communications from device 1208, such as reference signals, control information, data communications, or combinations thereof. Receiver 1202 may provide the received communications to one or more other components of device 1200. In some aspects, receiver 1202 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding) on ​​the received communications and may provide the processed signals to one or more other components of device 1200. In some aspects, receiver 1202 may include combinations of... Figure 2 The described UE includes one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receiver processors, one or more controllers / processors, one or more memories, or combinations thereof.

[0178] Transmitting component 1204 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1208. In some aspects, one or more other components of device 1200 may generate communications and provide the generated communications to transmitting component 1204 for transmission to device 1208. In some aspects, transmitting component 1204 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to device 1208. In some aspects, transmitting component 1204 may include combinations of... Figure 2 The described UE may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or combinations thereof. In some aspects, the transmit component 1204 may co-located with the receive component 1202 in one or more transceivers.

[0179] The communication manager 1206 may support the operation of the receiving component 1202 and / or the transmitting component 1204. For example, the communication manager 1206 may receive information associated with configuring the reception of communications by the receiving component 1202 and / or the transmission of communications by the transmitting component 1204. Additionally or alternatively, the communication manager 1206 may generate control information and / or provide control information to the receiving component 1202 and / or the transmitting component 1204 to control the reception and / or transmission of communications.

[0180] The receiving component 1202 can receive an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication. The communication manager 1206 can use the mapping scheme to perform DFT-s-OFDM communication.

[0181] The communication manager 1206 can perform DFT-s-OFDM communication according to the tone reservation configuration.

[0182] The communication manager 1206 can identify one or more locations of the subcarrier set in the bandwidth.

[0183] Figure 12 The number and arrangement of components shown are provided as an example. In practice, with... Figure 12 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 12 The two or more components shown can be implemented within a single component, or Figure 12 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 12 The component collection (one or more components) shown can be executed as described by Figure 12 The other set of components shown performs one or more functions.

[0184] Figure 13 This is a diagram of an example device 1300 for wireless communication according to the present disclosure. Device 1300 may be a network node, or a network node may include device 1300. In some aspects, device 1300 includes a receiving component 1302, a transmitting component 1304, and / or a communication manager 1306 that can communicate with each other (e.g., via one or more buses and / or one or more other components). In some aspects, communication manager 1306 is combined with... Figure 1 The described communication manager 150. As shown, device 1300 can communicate with another device 1308 (such as a UE or a network node (such as a CU, DU, RU or base station)) using receiving component 1302 and transmitting component 1304.

[0185] In some respects, device 1300 can be configured to perform the functions described herein. Figures 4 to 9 One or more operations as described herein. Additionally or alternatively, the apparatus 1300 may be configured to perform one or more processes described herein (such as...). Figure 11 The process 1100) or a combination thereof. In some respects, Figure 13 The illustrated device 1300 and / or one or more components may include a combination Figure 2 One or more components of the described network node. Additionally or alternatively, Figure 13 One or more components shown can be combined Figure 2Implementation within one or more of the described components. Additionally or alternatively, one or more components in the set of components may be implemented at least partially as software stored in one or more memories. For example, a component (or a portion thereof) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the function or operation of the component.

[0186] Receiver 1302 may receive communications from device 1308, such as reference signals, control information, data communications, or combinations thereof. Receiver 1302 may provide the received communications to one or more other components of device 1300. In some aspects, receiver 1302 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding) on ​​the received communications and may provide the processed signals to one or more other components of device 1300. In some aspects, receiver 1302 may include combinations of... Figure 2 The described network node may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receiver processors, one or more controllers / processors, one or more memories, or combinations thereof. In some aspects, receiver component 1302 and / or transmitter component 1304 may include or be included in a network interface. The network interface may be configured to acquire and / or output signals from device 1300 via one or more communication links, such as backhaul links, midhaul links, and / or fronthaul links.

[0187] Transmitting component 1304 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to device 1308. In some aspects, one or more other components of device 1300 may generate communications and provide the generated communications to transmitting component 1304 for transmission to device 1308. In some aspects, transmitting component 1304 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to device 1308. In some aspects, transmitting component 1304 may include combinations of... Figure 2 The described network node includes one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or combinations thereof. In some aspects, the transmit component 1304 may co-located with the receive component 1302 in one or more transceivers.

[0188] The communication manager 1306 may support the operation of the receiving component 1302 and / or the transmitting component 1304. For example, the communication manager 1306 may receive information associated with configuring the reception of communications by the receiving component 1302 and / or the transmission of communications by the transmitting component 1304. Additionally or alternatively, the communication manager 1306 may generate control information and / or provide control information to the receiving component 1302 and / or the transmitting component 1304 to control the reception and / or transmission of communications.

[0189] The transmitting component 1304 may transmit to the UE an indication of a mapping scheme for DFT-s-OFDM communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication. The communication manager 1306 may use the mapping scheme to perform DFT-s-OFDM communication.

[0190] The communication manager 1306 can perform DFT-s-OFDM communication according to the tone reservation configuration.

[0191] The communication manager 1306 can identify one or more locations in the bandwidth of multiple subcarriers carrying tone reservation signals.

[0192] The communication manager 1306 can identify channel information about the link between the network node and the UE, where the tone reservation configuration is derived using the channel information.

[0193] The Communication Manager 1306 can identify mapping schemes and tone reservation configurations.

[0194] The transmitting component 1304 can transmit a second indication of the second mapping scheme to the second UE.

[0195] Figure 13 The number and arrangement of components shown are provided as an example. In practice, with... Figure 13 Compared to the components shown, there may be additional components, fewer components, different components, or components arranged in a different manner. Furthermore, Figure 13 The two or more components shown can be implemented within a single component, or Figure 13 The single component shown can be implemented as multiple distributed components. Additionally or alternatively, Figure 13 The component collection (one or more components) shown can be executed as described by Figure 13 The other set of components shown performs one or more functions.

[0196] The following provides an overview of some aspects of this disclosure: Aspect 1: A method for wireless communication performed by a user equipment (UE), the method comprising: receiving an indication of a mapping scheme for discrete Fourier transform extended orthogonal frequency division multiplexing (DFT-s-OFDM) communication, wherein the mapping scheme indicates one or more gaps in subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and using the mapping scheme to perform the DFT-s-OFDM communication.

[0197] Aspect 2: According to the method of aspect 1, the mapping scheme is a null shift mapping scheme in which the subcarriers are shifted to form the one or more gaps.

[0198] Aspect 3: The method according to any one of Aspects 1 to 2, wherein the mapping scheme is a gap-filling mapping scheme in which one or more subcarriers are padded to the end of the bandwidth.

[0199] Aspect 4: The method according to any one of Aspects 1 to 3, wherein the one or more gaps are derived using at least one of channel response or peak-to-average power ratio.

[0200] Aspect 5: The method according to any one of Aspects 1 to 4, wherein the one or more gaps include a first gap and a second gap, wherein the first gap has a first length and the second gap has a second length different from the first length.

[0201] Aspect 6: The method according to any one of aspects 1 to 5, the method further comprising receiving a tone reservation configuration, wherein performing the DFT-s-OFDM communication further comprises performing the DFT-s-OFDM communication according to the tone reservation configuration.

[0202] Aspect 7: According to the method of aspect 6, wherein the tone reservation configuration indicates a plurality of subcarriers for carrying tone reservation signals, and wherein performing the DFT-s-OFDM communication further includes receiving the DFT-s-OFDM communication and discarding the tone reservation signals.

[0203] Aspect 8: According to the method of aspect 6, wherein the tone reservation configuration indicates a plurality of subcarriers for carrying a tone reservation signal, and wherein performing the DFT-s-OFDM communication further includes transmitting the DFT-s-OFDM communication including the tone reservation signal on the plurality of subcarriers.

[0204] Aspect 9: According to the method of aspect 6, wherein the tone reservation configuration indicates one or more locations in the bandwidth of a set of subcarriers for carrying tone reservation signals.

[0205] Aspect 10: The method according to aspect 9, wherein the information indicating the one or more locations is compressed.

[0206] Aspect 11: According to the method of aspect 10, wherein the information indicating the one or more locations indicates, for one location, a state different from that of the next location carrying a tone reservation signal.

[0207] Aspect 12: According to the method of aspect 6, the method further includes identifying one or more locations of the subcarrier set in the bandwidth.

[0208] Aspect 13: According to the method of aspect 12, the one or more locations include locations having minimum capacity or energy of the subcarrier.

[0209] Aspect 14: The method according to aspect 6, wherein the mapping scheme is a null shift mapping scheme, and wherein performing the DFT-s-OFDM communication according to the tone reservation configuration further includes skipping the one or more gaps and continuously allocating the subcarriers of the DFT-s-OFDM communication.

[0210] Aspect 15: The method according to aspect 6, wherein the mapping scheme is a gap-filling mapping scheme, and wherein performing the DFT-s-OFDM communication according to the tone reservation configuration further includes skipping the one or more gaps, moving one or more subcarriers from the end of the bandwidth into the one or more gaps, and then continuously allocating the subcarriers of the DFT-s-OFDM communication.

[0211] Aspect 16: According to the method of aspect 6, wherein the mapping scheme is a gap-filling mapping scheme, and wherein performing the DFT-s-OFDM communication according to the tone reservation configuration further includes moving one or more subcarriers from the one or more gaps to the end of the bandwidth.

[0212] Aspect 17: A method for wireless communication performed by a network node, the method comprising: sending to a user equipment (UE) an indication of a mapping scheme for discrete Fourier transform extended orthogonal frequency division multiplexing (DFT-s-OFDM) communication, wherein the mapping scheme indicates one or more gaps in subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and using the mapping scheme to perform the DFT-s-OFDM communication.

[0213] Aspect 18: According to the method of aspect 17, the mapping scheme is a null shift mapping scheme in which the subcarriers are shifted to form the one or more gaps.

[0214] Aspect 19: The method according to any one of Aspects 17 to 18, wherein the mapping scheme is a gap-filling mapping scheme in which one or more subcarriers are padded to the end of the bandwidth.

[0215] Aspect 20: The method according to any one of Aspects 17 to 19, wherein the one or more gaps are derived using at least one of channel response or peak-to-average power ratio.

[0216] Aspect 21: The method according to any one of aspects 17 to 20, wherein the one or more gaps include a first gap and a second gap, wherein the first gap and the second gap are non-uniform relative to each other.

[0217] Aspect 22: The method according to any one of aspects 17 to 21, the method further comprising sending a tone reservation configuration, wherein performing the DFT-s-OFDM communication further comprises performing the DFT-s-OFDM communication according to the tone reservation configuration.

[0218] Aspect 23: According to the method of aspect 22, wherein the tone reservation configuration indicates a set of subcarriers carrying a tone reservation signal, and wherein performing the DFT-s-OFDM communication further includes performing the DFT-s-OFDM communication with the tone reservation signal on the set of subcarriers.

[0219] Aspect 24: According to the method of aspect 23, wherein the tone reservation configuration indicates one or more positions of the subcarrier set in the bandwidth.

[0220] Aspect 25: The method according to aspect 24, wherein information indicating the one or more locations is compressed.

[0221] Aspect 26: According to the method of aspect 25, wherein the information indicating the one or more locations indicates a change in the state from carrying a tone reservation signal to not carrying the tone reservation signal or from not carrying the tone reservation signal to carrying the tone reservation signal.

[0222] Aspect 27: According to the method of aspect 22, the method further includes identifying one or more positions of a plurality of subcarriers carrying tone reservation signals in the bandwidth.

[0223] Aspect 28: The method according to aspect 27, wherein identifying the one or more locations further includes using the capacity or energy of the subcarrier to identify the one or more locations.

[0224] Aspect 29: According to the method of aspect 22, the method further includes identifying channel information about the link between the network node and the UE, wherein the tone reservation configuration is derived using the channel information.

[0225] Aspect 30: According to the method of aspect 22, sending the tone reservation configuration further includes sending the tone reservation configuration based on channel information or measurement values ​​associated with the UE.

[0226] Aspect 31: According to the method of aspect 22, the method further includes identifying the mapping scheme and the tone reservation configuration.

[0227] Aspect 32: According to the method of aspect 31, identifying the mapping scheme and the tone reservation configuration further includes: identifying a plurality of tone reservations; identifying one or more subcarriers having channel energy or capacity below a threshold for one or more mapping schemes; and using the one or more subcarriers to map the plurality of tone reservations.

[0228] Aspect 33: According to the method of aspect 32, wherein the plurality of tone reservations is a first number of tone reservations, and wherein identifying the mapping scheme and the tone reservation configuration further includes using the first number of tone reservations and a second number of tone reservations and iteratively identifying the mapping scheme and the tone reservation configuration based on a peak-to-average power ratio threshold.

[0229] Aspect 34: The method according to aspect 22, wherein the tone reservation configuration is a first tone reservation configuration and the UE is a first UE, and wherein the method further includes sending a second tone reservation configuration to a second UE.

[0230] Aspect 35: According to the method of aspect 34, the method further includes sending a second indication of the second mapping scheme to the second UE.

[0231] Aspect 36: An apparatus for wireless communication at a device, the apparatus comprising: one or more processors; one or more memories coupled to the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method according to one or more of aspects 1 to 35.

[0232] Aspect 37: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors being configured to cause the device to perform the method according to one or more of aspects 1 to 35.

[0233] Aspect 38: An apparatus for wireless communication, the apparatus comprising at least one component for performing the method according to one or more of aspects 1 to 35.

[0234] Aspect 39: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by one or more processors to perform the methods described in one or more of aspects 1 to 35.

[0235] Aspect 40: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method according to one or more of aspects 1 to 35.

[0236] Aspect 41: A device for wireless communication, the device including a processing system comprising one or more processors and one or more memories coupled to the one or more processors, the processing system being configured to cause the device to perform the method according to one or more of aspects 1 to 35.

[0237] Aspect 42: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors being individually or collectively configured to cause the device to perform the method according to one or more of aspects 1 to 35.

[0238] While the foregoing disclosure provides examples and descriptions, it is not intended to be exhaustive or to limit aspects to the precise forms disclosed. Modifications and variations can be made based on the foregoing disclosure, or from various aspects of practice.

[0239] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, "software" should be interpreted broadly as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, and / or functions, etc. As used herein, a "processor" is implemented in hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented through various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not limiting in any way. Therefore, no specific software code is referred to in this document to describe the operation and behavior of the systems and / or methods, as those skilled in the art will understand that the software and hardware can be designed, at least in part, based on the descriptions herein, to implement the systems and / or methods.

[0240] Hardware and data processing means for implementing the various exemplary logic, logic blocks, modules, and circuits described herein can be implemented or executed using general-purpose single-chip or multi-chip processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor can be a microprocessor, or any conventional processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration. In some aspects, specific processes and methods can be performed by circuitry dedicated to a given function.

[0241] As used in this article, depending on the context, "meeting the threshold" can mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0242] Although specific combinations of features are set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically set forth in the claims and / or not disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with each other claim in the claim set. As used herein, the phrase “at least one of” in the list of items refers to any combination of these entries, including a single member. As an example, “at least one of: a, b, or c” is intended to cover: a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination having multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other ordering of a, b, and c).

[0243] No element, action, or instruction used herein should be construed as essential or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items mentioned in connection with the article “the” and is interchangeable with “one or more.” Furthermore, as used herein, the terms “group” and “cluster” are intended to include one or more entries and are interchangeable with “one or more.” If only one item is desired, the phrase “only one” or similar terminology will be used. Additionally, as used herein, the terms “having” and the like are intended to be open-ended terms that do not limit the elements they modify (e.g., an element “having” A may also have B). Furthermore, the phrase “based on” is intended to mean “at least partially based on” unless otherwise explicitly stated. Additionally, as used herein, the term “or” is intended to be open-ended when used in a series and is interchangeable with “and / or” unless otherwise explicitly stated (e.g., if used in conjunction with “any” or “only one”).

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: One or more memory units; and One or more processors coupled to the one or more memories, the one or more processors being configured to cause the UE to: Receive an indication of a mapping scheme for Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and The mapping scheme is used to perform the DFT-s-OFDM communication.

2. The apparatus of claim 1, wherein the mapping scheme is a null shift mapping scheme in which the subcarriers are shifted to form the one or more gaps.

3. The apparatus of claim 1, wherein the mapping scheme is a gap-filling mapping scheme in which one or more subcarriers are padded to the end of the bandwidth.

4. The apparatus of claim 1, wherein the one or more gaps are derived using at least one of channel response or peak-to-average power ratio.

5. The apparatus of claim 1, wherein the one or more gaps include a first gap and a second gap, wherein the first gap has a first length and the second gap has a second length different from the first length.

6. The apparatus of claim 1, wherein the one or more processors are further configured to cause the UE to receive a tone reservation configuration, wherein, in order for the UE to perform the DFT-s-OFDM communication, the one or more processors are configured to cause the UE to perform the DFT-s-OFDM communication according to the tone reservation configuration.

7. The apparatus of claim 6, wherein the tone reservation configuration indicates a plurality of subcarriers for carrying a tone reservation signal, and wherein, in order for the UE to perform the DFT-s-OFDM communication, the one or more processors are configured to cause the UE to receive the DFT-s-OFDM communication and discard the tone reservation signal.

8. The apparatus of claim 6, wherein the tone reservation configuration indicates a plurality of subcarriers for carrying a tone reservation signal, and wherein, in order for the UE to perform the DFT-s-OFDM communication, the one or more processors are configured to cause the UE to transmit the DFT-s-OFDM communication including the tone reservation signal on the plurality of subcarriers.

9. The apparatus of claim 6, wherein the tone reservation configuration indicates one or more locations in the bandwidth of a set of subcarriers for carrying a tone reservation signal.

10. The apparatus of claim 9, wherein the information indicating the one or more locations is compressed.

11. The apparatus of claim 10, wherein the information indicating the one or more locations indicates, for one location, a state different from that of the next location carrying a tone reservation signal.

12. The apparatus of claim 6, wherein the one or more processors are further configured to cause the UE to identify one or more locations in the bandwidth for carrying a plurality of subcarriers for a tone reservation signal.

13. The apparatus of claim 12, wherein the one or more locations include locations having minimum capacity or energy of the subcarrier.

14. The apparatus of claim 6, wherein the mapping scheme is a space shift mapping scheme, and wherein, in order for the UE to perform the DFT-s-OFDM communication, the one or more processors are configured to cause the UE to skip the one or more gaps and continuously allocate the subcarriers of the DFT-s-OFDM communication.

15. The apparatus of claim 6, wherein the mapping scheme is a gap-filling mapping scheme, and wherein, in order for the UE to perform the DFT-s-OFDM communication, the one or more processors are configured to cause the UE to skip the one or more gaps, move one or more subcarriers from the end of the bandwidth into the one or more gaps, and then continuously allocate the subcarriers for the DFT-s-OFDM communication.

16. The apparatus of claim 6, wherein the mapping scheme is a gap-filling mapping scheme, and wherein, in order for the UE to perform the DFT-s-OFDM communication, the one or more processors are configured to cause the UE to move one or more subcarriers from the one or more gaps to the end of the bandwidth.

17. An apparatus for wireless communication at a network node, the apparatus comprising: One or more memory units; and One or more processors coupled to the one or more memories, the one or more processors being configured to cause the network node to: Sending an indication to the User Equipment (UE) of a mapping scheme for Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and The mapping scheme is used to perform the DFT-s-OFDM communication.

18. The apparatus of claim 17, wherein the mapping scheme is a null shift mapping scheme in which the subcarriers are shifted to form the one or more gaps.

19. The apparatus of claim 17, wherein the mapping scheme is a gap-filling mapping scheme in which one or more subcarriers are padded to the end of the bandwidth.

20. The apparatus of claim 17, wherein the one or more gaps are derived using at least one of channel response or peak-to-average power ratio.

21. The apparatus of claim 17, wherein the one or more gaps comprise a first gap and a second gap, wherein the first gap and the second gap are non-uniform relative to each other.

22. The apparatus of claim 17, wherein the one or more processors are further configured to cause the network node to send a tone reservation configuration, wherein, in order for the network node to perform the DFT-s-OFDM communication, the one or more processors are configured to cause the network node to perform the DFT-s-OFDM communication according to the tone reservation configuration.

23. The apparatus of claim 22, wherein the tone reservation configuration indicates a set of subcarriers carrying a tone reservation signal, and wherein, in order for the network node to perform the DFT-s-OFDM communication, the one or more processors are configured to cause the network node to perform the DFT-s-OFDM communication with the tone reservation signal on the set of subcarriers.

24. The apparatus of claim 23, wherein the tone reservation configuration indicates one or more locations of the subcarrier set in the bandwidth.

25. The apparatus of claim 24, wherein the information indicating the one or more locations is compressed.

26. The apparatus of claim 22, wherein the one or more processors are further configured to cause the network node to identify the mapping scheme and the tone reservation configuration.

27. The apparatus of claim 26, wherein, in order to enable the network node to identify the mapping scheme and the tone reservation configuration, the one or more processors are configured to cause the network node to: Multiple tone reserves are indicated; Identify one or more subcarriers having channel energy or capacity below a threshold used for one or more mapping schemes; and The one or more subcarriers are used to map the plurality of tone reservations.

28. A method for wireless communication performed by a user equipment (UE), the method comprising: Receive an indication of a mapping scheme for Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and The mapping scheme is used to perform the DFT-s-OFDM communication.

29. The method of claim 28, further comprising receiving a tone reservation configuration, wherein performing the DFT-s-OFDM communication further comprises performing the DFT-s-OFDM communication according to the tone reservation configuration.

30. A method for wireless communication performed by a network node, the method comprising: Sending an indication to the User Equipment (UE) of a mapping scheme for Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) communication, wherein the mapping scheme indicates one or more gaps in the subcarriers, wherein the one or more gaps are included in the bandwidth of the DFT-s-OFDM communication; and The mapping scheme is used to perform the DFT-s-OFDM communication.

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