Integration of frequency domain spectral shaping with spectral expansion and tone reservation

Abstract

The present disclosure provides a communication device and a communication method for integrating frequency domain spectral shaping (FDSS) with spectral extension with tone reservation. The communication apparatus includes a communication apparatus including circuitry to determine one or more frequency components of a spectral extension (SE) portion and one or more other frequency components of a non-SE portion of a signal based on control information related to the SE portion and the non-SE portion; generating a compensation signal based on the one or more frequency components of the SE portion; and generating a reduced peak signal based on the compensation signal; and a transmitter that transmits the reduced peak signal.

Description

Technical Field

[0001] The present disclosure relates to a communication device and a communication method for integrating frequency domain spectral shaping (FDSS) with spectrum spreading and tone reservation. Background Art

[0002] In the third generation partnership project (3GPP) technical specification version (Rel.) 15, NR supports frequency domain spectrum shaping (FDSS) without spectrum spreading for π / 2 binary phase-shift keying (BPSK) to reduce the maximum power reduction (MPR) and peak-to-average power ratio (PAPR). Specifically, FDSS is to create a pulse that decays faster than a basic periodic sine-like pulse by using an FDSS filter (e.g., a shaping function), so that it can reduce the peak of the (pulse) sidelobe, resulting in a reduction in MPR and PAPR. For example, the new radio (NR) uplink (UL) transmitter 600 of Figure 6 includes an FDSS module 602 for shaping the output from a discrete Fourier transform (DFT) module 604.

[0003] MPR / PAPR can be measured based on the output back-off (OBO) value of the power amplifier (PA), which is defined as in, is the saturated output power, is the actual average output power. Lower OBO values ​​are achieved, enabling higher output power from a given PA system under given emission constraints and transmit signal passband quality requirements. Therefore, high output power can be used to improve coverage performance. In Rel.16, FDSS work has continued to design a lower PAPR demodulation reference signal (DMRS) for the case of the physical uplink shared channel (PUSCH) with π / 2BPSK to reduce the MPR / PAPR to the same level as the MPR / PAPR of the data symbols.

[0004] However, there is still no discussion of a communication apparatus and method for integrating FDSS with spectrum spreading with tone reservation.

[0005] Therefore, there is a need for a communication device and method that provides a feasible technical solution for integrating FDSS with spectrum spreading with tone reservation. Furthermore, other desirable features and characteristics will become apparent from the subsequent detailed description and the appended claims, taken in conjunction with the accompanying drawings and background of the disclosure. Summary of the invention

[0006] Non-limiting and exemplary embodiments facilitate providing communication apparatus and methods for integrating FDSS with spectrum spreading and tone reservation.

[0007] According to a first embodiment of the present disclosure, a communication device is provided, comprising: a circuit that determines one or more frequency components of a spectrum-extension (SE) part and one or more other frequency components of a non-SE part of a signal based on control information related to the SE part; generates a compensation signal based on the one or more frequency components of the SE part; and generates a reduced peak signal based on the compensation signal; and a transmitter that transmits the reduced peak signal.

[0008] According to a second embodiment of the present disclosure, a base station is provided, comprising: a circuit that generates control information related to a spectrum extension (SE) part and a non-SE part of a signal, the control information indicating resource allocation for the SE part and the non-SE part in the frequency domain; and a transmitter that sends the control information to a communication device.

[0009] According to a third embodiment of the present disclosure, a communication method is provided, including: determining one or more frequency components of a spectrum extension (SE) part and one or more other frequency components of a non-SE part of a signal based on control information related to the SE part; generating a compensation signal based on the one or more frequency components of the SE part; and generating a reduced peak signal based on the compensation signal; and sending the reduced peak signal.

[0010] It should be noted that the general or specific embodiments may be implemented as a system, a method, an integrated circuit, a computer program, a storage medium, or any selective combination thereof.

[0011] The additional benefits and advantages of the disclosed embodiments will become apparent from the specification and drawings. These benefits and / or advantages can be obtained by various embodiments and features of the specification and drawings, respectively, and it is not necessary to provide all of these embodiments and features to obtain one or more such benefits and / or advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Embodiments of the present disclosure will be better understood by those skilled in the art and will be apparent to those skilled in the art through the following written description which is given by way of example only and in conjunction with the accompanying drawings, in which:

[0013] FIG1 illustrates an exemplary 3GPP NR Radio Access Network (NR-RAN) architecture to which exemplary embodiments of the present disclosure may be applied.

[0014] FIG2 depicts a schematic diagram showing the functional division between NG-RAN and 5G Core Network (5G Core Network, 5GC) to which exemplary embodiments of the present disclosure may be applied.

[0015] FIG3 depicts a sequence diagram of an RRC (Radio Resource Control) connection setup / reconfiguration procedure to which exemplary embodiments of the present disclosure may be applied.

[0016] FIG4 depicts a schematic diagram illustrating usage scenarios of enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra reliable and low latency communications (URLLC) to which exemplary embodiments of the present disclosure may be applied.

[0017] 5 shows a block diagram illustrating an exemplary 5G system architecture for vehicle to everything (V2X) communications in a non-roaming scenario to which exemplary embodiments of the present disclosure may be applied.

[0018] FIG. 6 shows an example diagram of a New Radio (NR) uplink (UL) transmitter with FDSS (without spectrum spreading) according to 3GPP Rel. 15 / 16.

[0019] FIG. 7 shows an example diagram of a configuration of radio resource allocation in the frequency domain.

[0020] FIG. 8 shows an example diagram of another configuration of radio resource allocation in the frequency domain.

[0021] 9 shows an example diagram of an NR UL transmitter with FDSS with spectrum spreading (SE) and tone reservation according to various embodiments of the present disclosure.

[0022] FIG. 10 shows an example diagram of a configuration of resource allocation in the frequency domain for two user equipments (UEs) according to an embodiment of the present disclosure.

[0023] FIG. 11 shows an example diagram of another configuration of resource allocation in the frequency domain for two UEs according to an embodiment of the present disclosure.

[0024] FIG. 12 shows an example diagram of integration of FDSS with spectrum spreading according to an embodiment of the present disclosure.

[0025] Fig.13 An example diagram of a PUSCH-Config information element (IE) according to an embodiment of the present disclosure is shown.

[0026] FIG. 14A shows an example diagram of changing a demodulation reference signal (DMRS) density in a spectrum extension (SE) section according to an embodiment of the present disclosure.

[0027] FIG. 14B shows another example illustration of changing the DMRS density in the SE part according to an embodiment of the present disclosure.

[0028] FIG. 15 shows a flow chart of a UE according to various embodiments.

[0029] FIG16 shows a flow chart of a base station (gNB) according to various embodiments.

[0030] FIG. 17 shows a flow chart illustrating a communication method according to various embodiments.

[0031] FIG. 18 shows a schematic block diagram of an example communication device according to various embodiments.

[0032] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily depicted to scale. For example, the size of some elements in the diagrams, block diagrams or flow charts may be enlarged relative to other elements to help improve the understanding of the present embodiment. DETAILED DESCRIPTION

[0033] Some embodiments of the present disclosure will be described by way of example only with reference to the accompanying drawings. Like reference numerals and characters in the drawings represent like elements or equivalents.

[0034] In addition to this, the overall system architecture assumes a NG-RAN (Next Generation Radio Access Network), which includes gNBs, providing NG radio access user plane (SDAP / PDCP / RLC / MAC / PHY) and control plane (RRC) protocol terminations to user equipment (UE). The gNBs are interconnected to each other via Xn interfaces. The gNBs are also connected to the NGC (Next Generation Core) via a Next Generation (NG) interface, more specifically to the AMF (Access and Mobility Management Function) (e.g., a specific core entity that implements the AMF) via a NG-C interface, and to the UPF (User Plane Function) (e.g., a specific core entity that implements the UPF) via a NG-U interface. The NG-RAN architecture 100 is shown in FIG. 1 (see, e.g., 3GPP TS 38.300 v16.3.0, Section 4).

[0035] The user plane protocol stack for NR (see e.g. 3GPP TS 38.300, Section 4.4.1) consists of the PDCP (Packet Data Convergence Protocol, see Section 6.4 of TS 38.300), RLC (Radio Link Control, see Section 6.3 of TS 38.300) and MAC (Medium Access Control, see Section 6.2 of TS 38.300) sublayers, which terminate in the gNB on the network side. In addition, a new access stratum (AS) sublayer (SDAP, Service Data Adaptation Protocol) is introduced on top of PDCP (see e.g. subclause 6.5 of 3GPP TS38.300). A control plane protocol stack is also defined for NR (see e.g. TS 38.300, Section 4.4.2). An overview of the Layer 2 functionality is given in subclause 6 of TS 38.300. The functionality of the PDCP, RLC and MAC sublayers is listed in Sections 6.4, 6.3 and 6.2 of TS38.300, respectively. The functions of the RRC layer are listed in subclause 7 of TS 38.300. In addition, sidelink communication was introduced in 3GPP TS 38.300 v16.3.0. The sidelink supports UE-to-UE direct communication using sidelink resource allocation modes, physical layer signals / channels, and physical layer procedures (see, e.g., Section 5.7 of TS 38.300).

[0036] For example, the medium access control layer handles logical channel multiplexing as well as scheduling and scheduling-related functions, including handling different parameter sets.

[0037] The physical layer (PHY) is responsible for, for example, coding, PHY HARQ processing, modulation, multi-antenna processing, and mapping signals to appropriate physical time-frequency resources. It also handles the mapping of transport channels to physical channels. The physical layer provides services to the MAC layer in the form of transport channels. A physical channel corresponds to a set of time-frequency resources used for the transmission of a specific transport channel, and each transport channel is mapped to a corresponding physical channel. For example, physical channels are the Physical Random Access Channel (PRACH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH) for uplink, and the Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), and Physical Broadcast Channel (PBCH) for downlink. In addition, the physical sidelink channels include the Physical Sidelink Control Channel (PSCCH), the Physical Sidelink Shared Channel (PSSCH), the Physical Sidelink Feedback Channel (PSFCH) and the Physical Sidelink Broadcast Channel (PSBCH).

[0038] NR use cases / deployment scenarios may include enhanced mobile broadband (eMBB), ultra-reliable low latency communications (URLLC), massive machine type communications (mMTC), which have different requirements in terms of data rate, latency and coverage. For example, eMBB is expected to support peak data rates (20Gbps for downlink and 10Gbps for uplink) and user-experienced data rates that are approximately three times higher than those provided by IMT-Advanced. On the other hand, in the case of URLLC, there is a strong demand for ultra-low latency (0.5 ms for both UL and DL for user plane latency) and high reliability (1-10 ms within 1ms). -5 ) puts forward more stringent requirements. Finally, mMTC may preferably require high connection density (1,000,000 devices / km in urban environments) 2), large coverage in harsh environments, and extremely long battery life (15 years) for low-cost devices.

[0039] Therefore, an OFDM parameter set (e.g., subcarrier spacing, OFDM symbol duration, cyclic prefix (CP) duration, number of symbols per scheduling interval) that is suitable for one use case may not be well suited for another use case. For example, low-latency services may preferably require shorter symbol durations (and therefore larger subcarrier spacing) and / or fewer symbols per scheduling interval (also known as TTI) compared to mMTC services. Furthermore, deployment scenarios with large channel delay spread may preferably require longer CP durations than scenarios with short delay spread. The subcarrier spacing should be optimized accordingly to retain similar CP overhead. NR can support more than one value of subcarrier spacing. Accordingly, subcarrier spacings of 15kHz, 30kHz, 60kHz… are currently being considered. The symbol duration Tu and the subcarrier spacing Δf are related by the formula Δf=1 / T u In a similar manner as in the LTE system, the term "resource element" may be used to denote a minimum resource unit consisting of one subcarrier of the length of one OFDM / SC-FDMA symbol.

[0040] In the new radio system 5G-NR, for each numerology set and carrier, a resource grid of subcarriers and OFDM symbols is defined for uplink and downlink respectively. Each element in the resource grid is called a resource element and is identified based on a frequency index in the frequency domain and a symbol position in the time domain (see 3GPP TS 38.211 v16.3.0).

[0041] The schematic diagram 200 of Figure 2 shows the functional division between NG-RAN and 5GC. The NG-RAN logical node is a gNB or ng-eNB. The 5GC has the logical nodes access and mobility management function (AMF), user plane function (UPF) and session management function (SMF).

[0042] In particular, gNB and ng-eNB host the following key functions:

[0043] Functions for radio resource management such as radio bearer control, radio admission control, connection mobility control, dynamic allocation of resources to UEs in both uplink and downlink (scheduling);

[0044] IP header compression, encryption and data integrity protection;

[0045] When the route to the AMF cannot be determined from the information provided by the UE, the AMF is selected when the UE attaches;

[0046] Routing user plane data to UPF;

[0047] Routing control plane information to AMF;

[0048] Connection establishment and release;

[0049] Scheduling and transmission of paging messages;

[0050] Scheduling and transmission of system broadcast information (originating from AMF or OAM);

[0051] Measurements and measurement reporting configuration for mobility and scheduling;

[0052] Transport level packet marking in uplink;

[0053] Session management;

[0054] Support network slicing;

[0055] QoS flow management and mapping to data radio bearers;

[0056] Support for UE in RRC_INACTIVE state;

[0057] NAS message distribution function;

[0058] Radio access network sharing;

[0059] Dual connectivity;

[0060] Tight interworking between NR and E-UTRA.

[0061] The Access and Mobility Management Function (AMF) hosts the following key functions:

[0062] Non-access layer NAS signaling is terminated;

[0063] NAS signaling security;

[0064] Access layer AS security control;

[0065] Core network CN inter-node signalling for mobility between 3GPP access networks;

[0066] Idle mode UE reachability (including control and execution of paging retransmissions);

[0067] Registration area management;

[0068] Supports mobility within and between systems;

[0069] Access authentication;

[0070] Access authorization, including roaming permission checks;

[0071] Mobility management control (subscription and policy);

[0072] Support network slicing;

[0073] Session management function SMF selection.

[0074] Additionally, the User Plane Function (UPF) hosts the following key functions:

[0075] Anchor point for intra / inter-RAT mobility (when applicable);

[0076] External PDU session point interconnected with the data network;

[0077] Packet routing and forwarding;

[0078] Packet inspection and user plane parts of policy rule enforcement;

[0079] Traffic usage report;

[0080] an uplink classifier to support routing of traffic flows to a data network;

[0081] Support branching points for multi-host PDU sessions;

[0082] QoS processing in the user plane, such as packet filtering, gating, and UL / DL rate enforcement;

[0083] Uplink service verification (SDF to QoS flow mapping);

[0084] Downlink packet buffering and downlink data notification trigger.

[0085] Finally, the session management function SMF hosts the following main functions:

[0086] Session management;

[0087] UE IP address allocation and management;

[0088] Selection and control of UP function;

[0089] Configure traffic steering at the user plane function (UPF) to route traffic to the appropriate destination;

[0090] Policy implementation and QoS control part;

[0091] Downlink data notification.

[0092] The sequence diagram 300 in Figure 3 shows some interactions between the UE, gNB and AMF (5GC entity) in the context of the UE transitioning from RRC_IDLE to RRC_CONNECTED for the NAS part (see TS 38.300 v16.3.0). The transition steps are as follows:

[0093] 1. UE requests to establish a new connection from RRC_IDLE.

[0094] 2 / 2a. The gNB completes the RRC establishment process.

[0095] NOTE: The following describes the scenario where the gNB rejects the request.

[0096] 3. The first NAS message from the UE piggybacked in RRCSetupComplete is sent to the AMF.

[0097] 4 / 4a / 5 / 5a. Additional NAS messages may be exchanged between the UE and AMF, see TS 23.502 reference

[22] (3GPP TS 23.122: "Non-Access-Stratum (NAS) functions related to Mobile Station in idle mode").

[0098] 6.AMF prepares UE context data (including PDU session context, security keys, UE radio capabilities and UE security capabilities etc.) and sends it to the gNB.

[0099] 7 / 7a. gNB activation and UE AS security.

[0100] 8 / 8a. The gNB performs reconfiguration to set up SRB2 and DRB.

[0101] 9. The gNB notifies the AMF that the establishment process is completed.

[0102] RRC is a high-level signaling (protocol) used for UE and gNB configuration. Specifically, the transition involves the AMF preparing UE context data (including, for example, PDU session context, security keys, UE radio capabilities and UE security capabilities, etc.) and sending it to the gNB along with the INITIAL CONTEXT SETUP REQUEST. The gNB then activates AS security with the UE, which is performed by the gNB sending a SecurityModeCommand message to the UE and by the UE responding to the gNB with a SecurityModeComplete message. Afterwards, the gNB performs reconfiguration to set up Signaling Radio Bearer 2, SRB2, and Data Radio Bearer DRB by sending an RRCReconfiguration message to the UE and receiving RRCReconfigurationComplete from the UE by the gNB in ​​response. For a signaling-only connection, the steps related to RRCReconfiguration are skipped because SRB2 and DRB are not set up. Finally, the gNB notifies the AMF of the completion of the setup procedure with an INITIAL CONTEXT SETUP RESPONSE.

[0103] The schematic diagram 400 in FIG4 shows some use cases for 5G NR. In the 3rd Generation Partnership Project New Radio (3GPP NR), three use cases that have been envisioned for IMT-2020 to support a wide variety of services and applications are being considered. The technical specification for Phase 1 of enhanced mobile broadband (eMBB) has been finalized. In addition to further extending eMBB support, current and future work will also involve standardization of ultra-reliable and low-latency communications (URLLC) and massive machine type communications (mMTC). FIG4 shows some examples of envisioned use scenarios for IMT in 2020 and beyond (see, for example, FIG2 of ITU-R M.2083).

[0104] URLLC use cases have stringent requirements on capabilities such as throughput, latency, and availability, and have been envisioned as one of the enablers for future vertical applications such as wireless control of industrial manufacturing or production processes, telemedicine surgery, distribution automation in smart grids, transportation safety, etc. Ultra-reliability for URLLC will be supported by identifying technologies that meet the requirements set by TR 38.913. For NR URLLC in Release 15, the key requirements include a target user plane latency of 0.5 ms for UL (uplink) and a target user plane latency of 0.5 ms for DL ​​(downlink). The general URLLC requirement for one transmission of a packet is a BLER (block error rate) of 1E-5 for a packet size of 32 bytes, with a user plane latency of 1 ms.

[0105] From a physical layer perspective, reliability can be improved in a number of possible ways. The current scope for improving reliability involves defining a separate CQI table for URLLC, more compact DCI formats, repetition of PDCCH, etc. However, as NR becomes more stable and mature (for NR URLLC key requirements), the scope for achieving ultra-reliability may widen. Specific use cases for NR URLLC in Rel.15 include augmented reality / virtual reality (AR / VR), e-health, e-safety, and mission-critical applications.

[0106] In addition, the technical enhancements targeted by NR URLLC are aimed at delay improvement and reliability improvement. Technical enhancements for delay improvement include configurable parameter sets, mini-slot-based scheduling with flexible mapping, grant-free (configured grant) uplink, mini-slot level repetition for data channels, and downlink preemption. Preemption means stopping the transmission for which resources have been allocated, and the allocated resources are used for another transmission that has been requested later but has lower latency / higher priority requirements. Therefore, the already authorized transmission is preempted by the later transmission. Preemption can be applied independently of a specific service type. For example, a transmission for service type A (URLLC) can be used for transmission preemption for service type B (such as eMBB). Technical enhancements for reliability improvement include a dedicated channel quality indicator / modulation and coding scheme (CQI / MCS) table for a target BLER of 1E-5.

[0107] The use case of mMTC (massive machine type communication) is characterized by a very large number of connected devices that typically send relatively small amounts of non-delay sensitive data. The devices are required to be low cost and required to have very long battery life. From the NR perspective, utilizing very narrow bandwidth portions is a possible solution to save power from the UE's perspective and achieve long battery life.

[0108] As mentioned above, the range of reliability in NR is expected to widen. A key requirement for all cases, especially required for URLLC and mMTC, is high reliability or ultra-reliability. Several mechanisms can be considered to improve reliability from a radio perspective and a network perspective. In general, there are several key potential aspects that can help improve reliability. These aspects include compact control channel information, data / control channel repetition, and diversity with respect to frequency, time and / or spatial domains. These aspects are generally applicable to reliability, regardless of the specific communication scenario.

[0109] For NR URLLC, other use cases with more stringent requirements have been identified, such as factory automation, transportation industry, and power distribution. The more stringent requirements are higher reliability (up to 10 -6 The features include high-speed LTE (high-speed), higher availability, packet sizes up to 256 bytes, time synchronization down to the order of a few μs (where the value can be one or a few μs, depending on the frequency range), and short latencies of around 0.5 to 1 ms, in particular a target user plane latency of 0.5 ms, depending on the use case.

[0110] In addition, for NR URLLC, several technical enhancements from the physical layer perspective have been identified. These technical enhancements are PDCCH (Physical Downlink Control Channel) enhancements related to compact DCI, PDCCH repetition, increased PDCCH monitoring. In addition, UCI (Uplink Control Information) enhancements are related to enhanced HARQ (Hybrid Automatic Repeat Request) and CSI feedback enhancements. In addition, PUSCH enhancements related to mini-slot level hopping and retransmission / repetition enhancements have been identified. The term "mini-slot" refers to a transmission time interval (TTI) that includes a smaller number of symbols than a slot (a slot including fourteen symbols).

[0111] The 5G QoS (Quality of Service) model is based on QoS flows and supports both QoS flows that require a guaranteed stream bit rate (GBRQoS flows) and QoS flows that do not require a guaranteed stream bit rate (non-GBRQoS flows). At the NAS level, QoS flows are therefore the finest granularity of QoS differentiation within a PDU session. QoS flows are identified within a PDU session by the QoS Flow ID (QFI) carried in the encapsulation header on the NG-U interface.

[0112] For each UE, 5GC establishes one or more PDU sessions. For each UE, NG-RAN establishes at least one Data Radio Bearer (DRB) together with the PDU session, and may subsequently configure one or more additional DRBs for one or more QoS flows of that PDU session (depending on when NG-RAN does so), for example, as shown above with reference to Figure 3. NG-RAN maps packets belonging to different PDU sessions to different DRBs. NAS-level packet filters in the UE and 5GC associate UL and DL packets with QoS flows, while AS-level mapping rules in the UE and NG-RAN associate UL and DL QoS flows with DRBs.

[0113] The block diagram 500 in Figure 5 shows a 5G NR non-roaming reference architecture (see TS 23.287 v16.4.0, Section 4.2.1.1). The application function (AF) (e.g., an external application server hosting 5G services) exemplarily described in Figure 4 interacts with the 3GPP core network to provide services, for example, to support application impact on service routing, access network exposure functions (NEFs), or interact with a policy framework for policy control (e.g., QoS control) (see Policy Control Function, PCF). Based on operator deployment, application functions that are deemed to be trusted by the operator may be allowed to interact directly with related network functions. Application functions that are not allowed by the operator to directly access network functions interact with related network functions using an external exposure framework via the NEF.

[0114] Figure 5 shows other functional units of the 5G architecture for V2X communication, namely, Unified Data Management (UDM), Policy Control Function (PCF), Network Exposure Function (NEF), Application Function (AF), Unified Data Repository (UDR), Access and Mobility Management Function (AMF), Session Management Function (SMF) and User Plane Function (UPF) in 5GC, as well as V2X Application Server (V2AS) and Data Network (DN), such as operator services, Internet access or third-party services. All or part of the core network functions and application services can be deployed and run on a cloud computing environment.

[0115] In the Rel.15 / 16 FDSS framework, the gNB’s receiver does not need to be aware of the shaping function (e.g., FDSS filter) used in the UE. This approach allows UE vendors to pursue their specific shaping implementation while guaranteeing system performance by meeting the minimum RF requirements defined in the specification (e.g., adjacent channel leakage ratio (ACLR), in-band emission (IBE), occupied bandwidth (OBW), error vector magnitude (EVM)). IBE is a measure of the ratio between the power in the allocated physical resource blocks (PRBs) within the channel bandwidth and the power in the unallocated PRBs. EVM is a measure of the distance between the received symbol (with a test receiver) and the original symbol. OBW is a measure of the spectral suppression of the transmitted signal, which is defined as the bandwidth that contains 99% of the total integrated average power. ACLR is another measure of the spectral suppression of the transmitted signal, especially from the perspective of adjacent channels. It can be defined as the ratio between the filtered average power centered on the channel under consideration and the corresponding average power at the adjacent channels. The minimum RF requirements generate boundary conditions for the shaping function implemented in the UE. By defining the minimum RF requirements, the gNB does not need to know the exact FDSS filter or shaping function used in the UE. The minimum RF requirements can be different for different modulation orders.

[0116] A new work item (WI) for further NR coverage enhancement (CovEnh) has been approved in Rel.18 in [RP-213579], where one of the goals is to reduce MPR / PAPR to improve coverage in the power domain. The new WI involves the following:

[0117] Study and, if necessary, specify the following power domain enhancements [RP-213579]

[0118] Regulatory compliant enhancements for increasing UE power high limits for carrier aggregation (CA) and dual connectivity (DC) based on Rel-17 RAN4 work on “Increasing UE power high limits for CA and DC” (This study is started after RAN4 work on “Increasing UE power high limits for CA and DC”, depending on the conclusions from RAN4. The objectives will be reconsidered and further clarified at the RAN plenary meeting after RAN4 work on “Increasing UE power high limits for CA and DC”, and the working group discussion will not start until the objectives are revised with a clear scope. In addition, it is expected that both RAN1 and RAN4 will be involved to decide whether the order is (RAN4, RAN1) or (RAN1, RAN4)).

[0119] Enhancements for MPR / PAPR reduction, including frequency-domain spectral shaping with and without spectrum spreading for Direct Fourier Transform Spread OFDM (DFT-S-OFDM) and tone reservation (RAN4, RAN1).

[0120] The FDSS filter (shaping function) used in the UE strongly depends on the resource allocation in the frequency domain. If the size of the resource allocation in the frequency domain increases, the OBO value may increase, resulting in smaller values ​​of MPR / PAPR reduction. Therefore, the FDSS filter should meet the EVM spectrum flatness requirement to effectively reduce the MPR / PAPR. These observations hold true for both the FDSS framework with and without spectrum extension. Tone reservation is to reserve tones (subcarriers or resource allocations in the frequency domain) for the UE to generate a compensation signal, which is added to the original signal in order to achieve a reduced MPR / PAPR signal. The size of the reserved tone can affect the MPR / PAPR reduction. In summary, these above methods require dedicated resource allocations in the frequency domain for them to work. However, the problem is that it is not specified in NR how tone reservation for enhanced coverage performance and FDSS with spectrum extension (SE) can be implemented.

[0121] Existing solutions to the above problems involve utilizing FDSS with SE or tone reservation separately (eg, the two methods are not used simultaneously). Limited reductions in MPR / PAPR can be achieved, but only from each method separately.

[0122] Among possible solutions, a simple combination of FDSS with SE and tone reservation is used, where each component works independently on its own (eg, both methods are used simultaneously).

[0123] However, it may cause additional problems. For example, the first problem is that the radio resources in the frequency domain are not fully used for data, which leads to low spectral efficiency. Referring to FIG. 7 , diagram 700 shows the radio resource allocation for UE1 in the frequency domain, and diagram 712 shows the radio resource allocation for UE2 in the frequency domain. In diagram 700 , SE parts 702 and 704 are added due to FDSS with SE, and peak reserved tones (PRT) 706 and 708 are reserved tones for UE1. However, it can be seen that only a few tones (e.g., data tone 710) from the traditional resource allocation in the frequency domain in Rel.15 / 16 FDSS are used for data. Similarly, in diagram 712 , SE parts 714 and 716 are added due to FDSS with SE, PRT 718 and 720 are reserved tones for UE2, and only the remaining data tone 722 is used for data.

[0124] The second problem is that when the resource allocation in the frequency domain is not configured correctly, the achievable MPR / PAPR reduction may be reduced. Referring to FIG. 8 , diagram 800 shows the radio resource allocation in the frequency domain for UE1 and UE2. In diagram 800 , SE portions 802 and 804 and a shared SE portion 806 (e.g., shared between both UE1 and UE2) are added due to FDSS with SE, PRTs 808 and 810 are reserved tones for UE1, and PRTs 812 and 814 are reserved tones for UE2. As can be seen in FIG. 8 , FDSS with spectrum spreading and / or tone reservation does not work well because a portion of the reserved tone PRT 810 for UE1 overlaps a portion of the data tone for UE2 due to the improper configuration of the resource allocation. Therefore, tone reservation can affect the effect of FDSS with SE such that the achievable MPR / PAPR reduction is reduced.

[0125] FIG9 shows an example diagram of an NR UL transmitter with FDSS and tone reservation with SE according to various embodiments of the present disclosure. The SE parts 914 and 916 of the output signal (e.g., the output signal of the DFT module 902) from the discrete Fourier transform (DFT) process (or the fast Fourier transform (FFT) process) are formed by copying or adding the upper part of the non-SE part 912 to the end of the lower part of the non-SE part 912 (e.g., to form the SE part 916) and copying or adding the lower part of the non-SE part 912 to the end of the upper part of the non-SE part 912 (e.g., to form the SE part 914). Alternatively, the SE parts 914 and 916 of the output signal from the DFT process (or the FFT process) are formed by adding two additional parts to the upper and lower parts of the non-SE part, respectively, where the two additional parts can be configured by the gNB or pre-configured (or predefined) in the technical specification. After forming the SE parts 914 and 916 (e.g., after passing through the SE process in the SE module 904), the output signal from the SE module 904 passes through the FDSS process in the FDSS module 906, where the output signal is multiplied by a weight (e.g., an FDSS filter coefficient of the shaping function of the FDSS module 906) to obtain a first signal 918 mapped to the non-SE part 912. In other words, the output signal passes through the FDSS filter to obtain the first signal 918 mapped to the non-SE part 912. In addition, the second signal 919 can be obtained by multiplying a portion of the output signal by other weights, and they are mapped to the SE parts 914 and 916. Similarly, in other words, a portion of the output signal passes through the FDSS filter to obtain a second signal 919 mapped to the SE parts 914 and 916. The plurality of subcarriers includes a group of subcarriers for the SE parts 914 and 916 and the remaining subcarriers for the non-SE part 912.

[0126] After the FDSS process in the FDSS module 906, the signal undergoes element mapping to generate a compensation signal 922 in the frequency domain in the module 908 (e.g., based on the SE parts 914 and 916). The first signal 918 and the second signal 919 are used to create a combined signal in the frequency domain (e.g., before the Inverse Fast Fourier Transform (IFFT) process, the combined signal 920 is created in the frequency domain). After the IFFT process, the combined signal 920 is converted to the time domain (e.g., converted into a combined signal 921 in the time domain after the IFFT process). In addition, the compensation signal 922 in the frequency domain is created by including some values ​​of the SE part and zero values ​​of the non-SE part. After the IFFT process, the compensation signal 922 is converted into a compensation signal 923 in the time domain; and is used to control the peak of the combined signal 921 in the time domain (e.g., a process for tone reservation) by a peak control algorithm such as in a controller, so that a combined signal 924 with a lower MPR / PAPR is generated. Alternatively, the combined signal 920 and the compensated signal 922 may be combined before an Inverse Fast Fourier Transform (IFFT) process, and then the combined signal may be converted to the time domain.

[0127] In principle, in FIG. 9 , the process of the method of FDSS with SE includes the process of SE 904 and the process of FDSS 906 , wherein the purpose of FDSS is to reduce the peak value of the (pulse) sidelobe, and the purpose of the SE part is to provide a longer time separation of adjacent pulses to further reduce the peak value. Basically, for the process of the FDSS method with SE, if the SE part is large, a shorter sidelobe pulse tail and a smaller sidelobe pulse amplitude can be achieved. Therefore, the achievable value of MPR / PAPR may be small. On the other hand, if the SE part is small, the cost is a longer pulse tail of the sidelobe and a larger pulse amplitude of the sidelobe. Therefore, the achievable value of MPR / PAPR may still be high. In addition, for the process of the method of tone reservation, the purpose is to solve an optimization problem, such as a convex optimization problem, based on the compensation signal 922, so as to additionally reduce the peak value of the combined signal. Since it is an optimization problem, it can be solved by using an iterative algorithm.

[0128] Advantageously, a reduction in MPR / PAPR can be enjoyed by using both methods of FDSS with SE and tone reservation, so that high output power can be used to improve coverage performance. This advantage is important because, in consideration of spectral efficiency, the SE part can be configured to be small in practice, so that the process of the method of FDSS with SE can only slightly reduce the MPR / PAPR. In this case, the process of the tone reservation method can help to additionally reduce the MPR / PAPR. In addition, the solution also solves the aforementioned first and second problems, because the compensation signal in the tone reservation process can be mapped only to the SE part to solve the first and second problems. In general, compared with the possible solution described above (in which a simple combination of FDSS with SE and tone reservation is used), the solution can provide better performance in terms of MPR / PAPR and spectral efficiency, that is, lower MPR / PAPR values ​​and higher spectral efficiency can be achieved.

[0129] In the above solution, the weights may be coefficients of a shaping function (e.g., an FDSS filter). Multiple subcarriers may be replaced by a physical resource block (PRB), a resource block (RB), a resource element (RE), or a bandwidth part (BWP) in the frequency domain (where 1 PRB / RB includes 12 subcarriers), or a non-overlapping sub-band full duplex (SFBD) / cross-division duplex (XDD). The non-SE part may be used for both data and DMRS, while the SE part may be used only for DMRS. Therefore, the DMRS in both the SE part and the non-SE part may be used to estimate the channel to achieve diversity gain.

[0130] It is possible to have the same or different configurations of resource allocation between two or more different UEs with overlapping SE portions. FIG. 10 shows an example of a configuration of resource allocation in the frequency domain for different UEs (e.g., resource allocation 1000 for UE#1 and resource allocation 1002 for UE#2), where there is a non-overlapping portion of SE between UE#1 and UE#2, and a different configuration of the SE portion and the non-SE portion for each UE. Diagram 1100 of FIG. 11 shows an example of another configuration of resource allocation in the frequency domain for different UEs (e.g., UE#1 and UE#2), where there is an overlapping portion of SE between the resource allocations of UE#1 and UE#2 (e.g., overlapping portion 1102), and the same configuration of the SE portion and the non-SE portion for both UEs.

[0131] In an embodiment, the UE may receive an indication (e.g., control information) related to the SE part and the non-SE part. Upon receiving the indication, the UE may determine the SE part and the non-SE part according to the following three options:

[0132] - Option 1: The SE part can be deterministic (e.g., predefined based on the number of physical resource blocks, modulation order, and other factors, as explained further below) and the non-SE part can be determined based on the traditional frequency domain resource allocation (FDRA) specified in current technical specifications (e.g., Used as a parameter to describe the legacy FDRA of a UE).

[0133] -Option 2: The SE part can be based on the traditional FDRA ( ) and instructions ( ) configuration.

[0134] The -SE part can be expressed as If the SE part is The additional part of the non-SE part and the multiple subcarriers used in the SE part can be expressed as .in, It is a non-SE part, for example, as shown in FIG. 10 and FIG. 11 .

[0135] - If both the non-SE part and the SE part are restricted to Then the non-SE part can be expressed as For example, referring to FIG. 12 , the non-SE portion 1202 of UE#1 (eg, represented as ) and SE portion 1204 (e.g., represented as ) is limited to the source allocation of 1200 1, while the non-SE portion 1208 of UE#2 (e.g., represented as ) and SE portion 1210 (e.g., represented as ) is limited by the resource allocation 1206 2.

[0136] -when Option 2 can be considered a variation of Option 1 when is a constant value or is specified in the specification.

[0137] - Alternatively, It can be smaller if the non-SE part is larger, and In the case where the non-SE part is small, it can be larger. In other words, in the case where the non-SE part is large, the SE part can be smaller, and in the case where the non-SE part is small, the SE part can be larger.

[0138] - Alternatively, in the case where the non-SE portion is larger, the ratio of the SE portion to the non-SE portion may become smaller, and in the case where the non-SE portion is smaller, the ratio of the SE portion to the non-SE portion may become larger.

[0139] - Option 3: The SE part and the non-SE part are separately selectable based on the parameters including pairs (e.g., )) instructions to configure.

[0140] For options 1-3 above, the SE part of a UE should not overlap with the non-SE part of another UE, as this may affect the reduction of MPR / PAPR. The same DMRS density can be applied to both the SE part and the non-SE part. The UE can determine the transport block size (TBS) for PUSCH based on the total number of subcarriers in the non-SE part. In option 2, when the SE part is an additional part of the non-SE part (e.g., The wider the non-SE part is, the wider the SE part can be. In the case of a wide non-SE part, a narrow SE part may be sufficient.

[0141] In option 1, upon receiving the control information, the UE understands that integration of FDSS with SE and tone reservation is triggered. The SE part can be determined (e.g., predefined) as a number of physical resource blocks (PRBs) (e.g., 1 PRB, 2 PRBs, etc.). Alternatively, the SE part can be determined based on the modulation order (e.g., for lower modulation orders, the SE part can include fewer subcarriers, but for higher modulation orders, it can include more subcarriers. This is because high modulation orders can create high PAPR, so the SE part requires more subcarriers to reduce the high PAPR. For example, for π / 2 BPSK / QPSK, the SE part can include 2 PRBs, but for higher modulation orders, it can include 4 PRBs). Alternatively, the SE part may depend on the size of the legacy FDRA (e.g., for a smaller legacy FDRA, the SE part may include fewer subcarriers, and for a wider legacy FDRA, more subcarriers. For example, if the legacy FDRA includes 4 PRBs, the SE part may include 2 PRBs, and if the legacy FDRA includes 20 PRBs, the SE part may include 4 PRBs). The control information may be signaled by an indication in the downlink control information (DCI), for example, a reserved bit may be used. If the reserved bit value is "1", it means that integration is "triggered". Otherwise, integration is "not triggered". Alternatively, the indication may be indicated in a MAC Control Element (MAC CE) or Radio Resource Control (RRC) (e.g., proposing a new entry in PUSCH-Config, such as FDSSwSEnTR=ENUMERATED{trigger_interded}), or based on an implicit indication from another signaling or configuration from the base station (gNB) (e.g., proposing a new entry in PUSCH-Config, such as FDSSwSEnTR=ENUMERATED{trigger_interded}). By utilizing the indication in the MAC CE / RCC or the implicit indication through another signaling or combination, signaling overhead may be saved. Note that in order to define the SE part in Option 2 and Option 3, the dependency of the modulation order and the SE part may be considered to calculate the gNB in ​​Option 2 below and the candidate values ​​in option 3 below ).

[0142] In option 2, upon receiving the control information, the UE understands that integration of FDSS with SE and tone reservation is triggered and uses this indication to determine the SE portion and non-SE portion of the signal. ) can be indicated in the DCI (for example, The list of candidate values ​​of is configured by MAC-CE / RRC, the list of candidate values ​​is, for example, {0.1, 0.2}, and the reserved bit in the DCI can be used to indicate the value to be used The notification may be signaled by one of the values ​​of , an indication in the MAC CE or RRC, or an implicit indication based on another signaling or configuration from the gNB.

[0143] The indication in MAC CE / RRC for option 2 may be based on a bitmap-based approach (e.g., when the legacy FDRA ( ) is N subcarriers (or PRBs), the length of the bitmap is N bits. If the bit value in the bitmap is "0", the subcarrier (or PRB) is used for the SE part. If it is "1", the subcarrier (or PRB) is used for the non-SE part. For example, when the legacy FDRA has 4 consecutive PRBs and the bitmap is signaled as 0110, the UE can determine that the first and fourth PRBs correspond to the SE part and the second and third PRBs correspond to the non-SE part. Alternatively, the indication in the MAC CE / RRC for option 2 can be a value-based method, for example, is signaled as a value from a list of candidate values, such as {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9}. For example, when a conventional FDRA has 10 consecutive PRBs and When is signaled as 0.2, the UE can determine that the first and last PRBs correspond to the SE part, while the remaining PRBs correspond to the non-SE part. There may be other possibilities for the list of candidate values.

[0144] In addition, for the signaling of option 2, an indication such as Alpha Information Element (IE) may be proposed in the PUSCH-Config IE to trigger the integration of FDSS with SE and tone reservation; and the UE may use this IE to determine the SE part and the non-SE part. For example, Fig.13 A diagram of a PUSCH-Config IE 1300 according to Option 2 is shown, where a set of candidate values ​​for Alpha is listed as {0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9}, where one of the candidate values ​​is indicated for Alpha (see reference numeral 1302). Currently, for type 1 uplink resource allocation, the legacy FDRA is indicated by the FDRA bit field in the DCI, which includes the FDRA bit field corresponding to the starting virtual resource block. The resource indication value (RIV) and the length of the contiguous allocated resource blocks For integration of FDSS with SE and tone reservation, the FDRA bit field may be reused to indicate the RIV of the SE part and the non-SE part according to the following operation, where according to the following formula: and are the RIVs for the upper and lower subsections of the SE section, respectively, and Is the RIV for the non-SE part:

[0145] if ,but

[0146]

[0147]

[0148]

[0149] otherwise,

[0150]

[0151]

[0152] in , and not more than

[0153] Additionally, an implicit indication based on another signaling or configuration from the gNB may be based on The table of candidate values ​​is provided, which is configured by MAC-CE / RRC, MCS bit field (or other existing bit field), wherein the MCS bit field (or other existing bit field) is reused to indicate the The row index of a table (e.g., Table 1 shown below) of the value of It can also be used to jointly indicate the non-SE part and the SE part in option 2.

[0154]

[0155] Table 1: Candidate value of

[0156] In option 3, upon receiving the control information, the UE understands that integration of FDSS with SE and tone reservation is triggered, and it uses the pairing parameters ( ) as an indication for respectively determining the SE portion and the non-SE portion. Indicates a set of subcarriers used for the SE part, Indicates another set of subcarriers for the non-SE part. The signaling method used for option 2 can also be used to indicate the pairing parameters for option 3 ( For example, based on the value-based approach of option 2, for option 3, ( ) may be signaled as a pair from a candidate pair list, such as {(2,2), (2,4), etc.}, where and The unit of is PRB. In Option 1-Option 3, there is no explicit indication for the determination of the SE part in Option 1, but there is an explicit indication for the determination of the SE part in Option 2 (for example, ), and in option 3 there is an explicit indication for the determination of the SE part (e.g., ( )).

[0157] In an embodiment, the SE portion may be less than or equal to a PRB of a specific size. The specific size may be configured to be smaller in frequency range 1 (FR1) and larger in frequency range 2 (FR2), where the frequency band of FR2 is higher than the frequency band of FR1. This may result in a lower OBO value for the power amplifier. If a lower OBO value is achieved, a greater output power may be obtained while still meeting the minimum RF requirements. For example, the SE portion may be configured or preconfigured to be less than or equal to 2 PRBs and 6 PRBs in FR1 and FR2, respectively.

[0158] In an embodiment, different DMRS densities may be applied to the SE part and the non-SE part. For example, referring to the diagram 1400 of FIG. 14A , a group of subcarriers (e.g., SE / 2 subcarriers) from the upper side and the lower side (e.g., reference numeral 1404) in the non-SE part 1406 are replicated to be placed on the lower side and the upper side of the DFT output, respectively, to form the SE part 1402, and are configured with a larger DMRS density (from DMRS density #1 to DMRS density #2) in the FDSS with SE (e.g., DMRS density #2 is configured for the SE part 1402, while DMRS density #1 is configured for the non-SE part 1406). This operation is performed on both sides of the DFT. This advantageously improves channel estimation.

[0159] In an embodiment, different DMRS densities may be applied to the SE part and the non-SE part, as shown in diagram 1408 of FIG. 14B . A group of subcarriers (e.g., SE / 2 subcarriers) from the upper / lower side (e.g., reference numeral 1410) of the DFT output in the non-SE part 1414 is configured with a larger DMRS density (from DMRS density #1 to DMRS density #2), and then copied to be placed on the other side of the DFT output in the FDSS with SE as the SE part 1412 (e.g., the middle sub-part of the non-SE part is configured with DMRS density #1 (e.g., reference numeral 1416), while the upper and lower sub-parts of the non-SE part are configured with the same DMRS density #2 as the SE part (e.g., reference numeral 1418)). This operation is performed on both sides of the DFT output. This advantageously improves channel estimation.

[0160] In an embodiment, the size of the SE part may be determined based on one or a combination of spectral efficiency and / or MPR / PAPR values ​​(e.g., an optimal value for MPR / PAPR reduction may be set and used for determining the size of the SE part). The SE part may be a UE-specific value, a UE type-specific value, or a serving cell-specific value based on control information received from the gNB and / or depending on which value the gNB allows. In Option 2 and Option 3, if = 0, there is only a non-SE part, then the advanced solution becomes FDSS without both SE and tone reservation, which is equivalent to the fallback solution specified in Rel.15 / 16 FDSS. It should be understood that all the above embodiments and options apply to all uplink channels and signals.

[0161] FIG. 15 shows a flow chart 1500 of a UE according to various embodiments. In step 1502, the UE receives an indication (control information) related to the SE part and the non-SE part from the gNB. In step 1504, the UE performs a control operation according to Option 1 (e.g., the SE part can be deterministic and the non-SE part is the traditional FDRA), Option 2 (e.g., the SE part can be based on the traditional FDRA and the control information from the indication). to configure), or option 3 (for example, the SE part and the non-SE part can be based on the ( ) to configure) determine the SE part and the non-SE part. In step 1506, the UE reduces the peak of the pulse sidelobe by obtaining the first signal in the non-SE part and the second signal in the SE part. In step 1508, the UE generates a compensation signal. In step 1510, the UE uses the compensation signal to additionally control the peak of the combined signal including the first signal and the second signal in the time domain. In step 1512, the UE sends the combined signal.

[0162] Based on the above embodiments and examples and the different criteria described in FIGS. 1 to 15 , the base station or gNB prepares resource allocation for the SE part and the non-SE part, and generates corresponding control information related to the SE part and the non-SE part to transmit to the UE to perform FDSS with spectrum spreading and tone reservation in order to reduce the peak of the uplink transmission. Therefore, it allows the UE to send an uplink channel or signal with a higher output power to improve coverage performance while still meeting the minimum RF requirements. In addition, the base station or gNB may be configured to receive an uplink channel or signal, which is generated at the UE based on the above examples and embodiments and sent from the UE. In addition, the base station or gNB may be configured to demodulate the received uplink channel or signal by using only the non-SE part or using both the non-SE part and the SE part. FIG. 16 shows a flowchart 1600 of a base station (e.g., gNB) according to various embodiments. In step 1602, the gNB prepares resource allocation for the SE part and the non-SE part in the frequency domain. In step 1604, the gNB generates an indication (e.g., control information) related to the SE part and the non-SE part. In step 1606, the gNB sends an indication to the UE.

[0163] FIG. 17 shows a flow chart 1700 illustrating a communication method according to various embodiments. In step 1702, one or more frequency components of a spectrum extension (SE) portion and one or more other frequency components of a non-SE portion of a signal are determined based on control information related to a SE portion. In step 1704, a compensation signal is generated based on the one or more frequency components of the SE portion. In step 1706, a reduced peak signal is generated based on the compensation signal. In step 1708, the reduced peak signal is transmitted.

[0164] Fig. 18 shows a schematic partial cross-sectional view of a communication device 1800 that may be implemented according to various embodiments and examples as shown in Figs. 1 to 17. According to various embodiments, the communication device 1800 may be implemented as a UE or a base station.

[0165] The various functions and operations of the communication device 1800 are arranged as layers according to a layered model. In this model, lower layers report to and receive instructions from higher layers according to 3GPP technical specifications. For simplicity, the details of the layered model are not discussed in this disclosure.

[0166] As shown in FIG. 18 , the communication device 1800 may include a circuit 1814, at least one radio transmitter 1802, at least one radio receiver 1804, and at least one antenna 1812 (for simplicity, only one antenna is depicted in FIG. 18 for illustration purposes). The circuit 1814 may include at least one controller 1806 for software and hardware-assisted execution of the tasks that the at least one controller 1806 is designed to perform, including controlling communication with one or more other communication devices in a wireless network. The circuit 1814 may also include at least one transmit signal generator 1808 and at least one receive signal processor 1810. The at least one controller 1806 may control the at least one transmit signal generator 1808 and at least one receive signal processor 1810, the at least one transmit signal generator 1808 being used to generate a signal (e.g., a signal indicating a geographic area) to be transmitted to one or more other communication devices through the at least one radio transmitter 1802, and the at least one receive signal processor 1810 being used to process signals (e.g., a signal indicating a geographic area) received from one or more other communication devices through the at least one radio receiver 1804 under the control of the at least one controller 1806. At least one transmit signal generator 1808 and at least one receive signal processor 1810 can be independent modules of the communication device 1800, which communicate with at least one controller 1806 to implement the above functions, as shown in Figure 18. Alternatively, at least one transmit signal generator 1808 and at least one receive signal processor 1810 can be included in at least one controller 1806. It will be appreciated by those skilled in the art that the arrangement of these functional modules is flexible and can be changed according to actual needs and / or requirements. Data processing, storage and other related control devices can be arranged on appropriate circuit boards and / or in chipsets. In various embodiments, at least one radio transmitter 1802, at least one radio receiver 1804 and at least one antenna 1812 can be controlled by at least one controller 1806.

[0167] The communication device 1800 provides the functions required to integrate FDSS with spectrum extension and tone reservation. For example, the communication device 1800 can be a UE, and the circuit 1814 can determine one or more frequency components of the spectrum extension (SE) portion and one or more other frequency components of the non-SE portion of the signal based on control information related to the SE portion; generate a compensation signal based on the one or more frequency components of the SE portion; and generate a reduced peak signal based on the compensation signal. The transmitter 1802 can send the reduced peak signal.

[0168] The reduced peak signal may be generated by adding a compensation signal to a signal shaped by a frequency domain spectrum shaping (FDSS) filter. Determining one or more other frequency components of the non-SE portion may also include multiplying output information from a discrete Fourier transform (DFT) process (or a fast Fourier transform (FFT) process) with coefficients of the frequency domain spectrum shaping (FDSS) filter. The SE portion and the non-SE portion may each include one or more multiple subcarriers in the frequency domain. Circuit 1814 may also be configured to determine a transport block size (TBS) for uplink transmission based on a total number of subcarriers in the non-SE portion. The non-SE portion may include more subcarriers than the SE portion.

[0169] The receiver 1804 may receive the control information via downlink control information (DCI), medium access control control element (MAC CE), or radio resource control (RRC), or via an implicit indication based on another signaling or configuration from the base station.

[0170] The circuit 1814 may be configured to determine the SE part based on the non-SE part. The control information may indicate that the non-SE part is a legacy frequency domain resource allocation (FDRA) specified in the technical specification. , and the circuit 1814 may also be configured to determine the SE part as a plurality of subcarriers or a plurality of physical resource blocks (PRBs) according to an indication in the control information, or determine the SE part based on a modulation order or size of a conventional FDRA. The circuit 1814 may be configured to determine the SE part based on a conventional FDRA ( ) to determine the SE part and the parameters indicated in the control information ( ), the SE part is The control information may indicate a parameter pair ( ), Indicates one or more subcarriers of the SE part, Indicates one or more other subcarriers of the non-SE portion, and circuit 1814 may be configured to respectively and The SE part and the non-SE part are determined. The circuit 1814 may be configured to determine the size of the SE part based on the frequency range (FR) of the SE part according to the control information. The circuit 1814 may be configured to determine the size of the SE part based on one or a combination of spectral efficiency or maximum power reduction / peak-to-average power ratio (MPR / PAPR) values.

[0171] In addition, the communication device 1800 can be a base station or a gNB, and the circuit 1814 can generate control information related to the spectrum extension (SE) part and the non-SE part of the signal, the control information indicating the resource allocation of the SE part and the non-SE part in the frequency domain. The transmitter 1802 can send the control information to the communication device.

[0172] (Control signal)

[0173] In the present disclosure, a downlink control signal (information) related to the present disclosure may be a signal (information) transmitted through a PDCCH of a physical layer, or may be a signal (information) transmitted through a MAC control element (CE) or RRC of a higher layer. The downlink control signal may be a predefined signal (information).

[0174] The uplink control signal (information) related to the present disclosure may be a signal (information) transmitted through the PUCCH of the physical layer, or may be a signal (information) transmitted through the MAC CE or RRC of a higher layer. In addition, the uplink control signal may be a predefined signal (information). The uplink control signal may be replaced with uplink control information (UCI), first-level sidelink control information (SCI), or second-level SCI.

[0175] (Base Station)

[0176] In the present disclosure, a base station may be, for example, a Transmission Reception Point (TRP), a cluster head, an access point, a Remote Radio Head (RRH), an eNodeB (eNB), a gNodeB (gNB), a base station (BS), a base transceiver station (BTS), a base station unit, or a gateway. In addition, in sidelink communication, a terminal may be used instead of a base station. A base station may be a relay device that relays communication between a higher node and a terminal. A base station may also be a roadside unit.

[0177] (Uplink / Downlink / Sidelink)

[0178] The present disclosure may be applied to any one of an uplink, a downlink, and a sidelink.

[0179] The present disclosure can be applied to, for example, uplink channels (such as PUSCH, PUCCH and PRACH), downlink channels (such as PDSCH, PDCCH and PBCH), and sidelink channels (such as physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH) and physical sidelink broadcast channel (PSBCH)).

[0180] PDCCH, PDSCH, PUSCH and PUCCH are examples of downlink control channels, downlink data channels, uplink data channels and uplink control channels, respectively. PSCCH and PSSCH are examples of sidelink control channels and sidelink data channels, respectively. PBCH and PSBCH are examples of broadcast channels, respectively, and PRACH is an example of a random access channel.

[0181] (Data channel / Control channel)

[0182] The present disclosure may be applied to any one of a data channel and a control channel. The channels in the present disclosure may be replaced with data channels including PDSCH, PUSCH and PSSCH and / or control channels including PDCCH, PUCCH, PBCH, PSCCH and PSBCH.

[0183] (Reference signal)

[0184] In the present disclosure, a reference signal is a signal known to both a base station and a mobile station, and each reference signal may be referred to as a reference signal (RS) or sometimes referred to as a pilot signal. The reference signal may be any one of a DMRS, a channel state information reference signal (CSI-RS), a tracking reference signal (TRS), a phase tracking reference signal (PTRS), a cell-specific reference signal (CRS), and a sounding reference signal (SRS).

[0185] (Time interval)

[0186] In the present disclosure, the time resource unit is not limited to one or a combination of a time slot and a symbol, and may be a time resource unit such as a frame, a superframe, a subframe, a time slot, a time slot, a sub-time slot, a micro-time slot, or a time resource unit such as a symbol, an orthogonal frequency division multiplexing (OFDM) symbol, a single carrier-frequency division multiplexing access (SC-FDMA) symbol, or other time resource units. The number of symbols included in a time slot is not limited to any number of symbols exemplified in the above-mentioned embodiments, and may be other numbers of symbols.

[0187] (frequency band)

[0188] The present disclosure may be applied to any of licensed and unlicensed frequency bands.

[0189] (communication)

[0190] The present disclosure can be applied to any one of the communication between a base station and a terminal (Uu-link communication), the communication between a terminal and a terminal (Sidelink communication), and the vehicle-to-everything (V2X) communication. The channels in the present disclosure can be replaced with PSCCH, PSSCH, physical sidelink feedback channel (PSFCH), PSBCH, PDCCH, PUCCH, PDSCH, PUSCH, and PBCH.

[0191] In addition, the present disclosure can be applied to any network in a terrestrial network or a network other than a terrestrial network (NTN: Non-Terrestrial Network) using a satellite or a High Altitude Pseudo Satellite (HAPS). In addition, the present disclosure can be applied to a network with a large cell size and a terrestrial network with a large delay compared to a symbol length or a time slot length, such as an ultra-wideband transmission network.

[0192] (Antenna port)

[0193] An antenna port refers to a logical antenna (antenna group) formed by one or more physical antennas. That is, an antenna port does not necessarily refer to one physical antenna, but sometimes refers to an array antenna formed by multiple antennas, etc. For example, it is not defined how many physical antennas form an antenna port, but the antenna port is defined as the minimum unit through which the terminal is allowed to send a reference signal. The antenna port can also be defined as the minimum unit for multiplication of precoding vector weights.

[0194] As described above, the embodiments of the present disclosure provide an advanced communication system, a communication method, and a communication apparatus that advantageously integrate FDSS with spectrum extension and tone reservation.

[0195] The present disclosure can be implemented by software, hardware, or software in collaboration with hardware. Each functional block used in the description of each of the above embodiments can be partially or entirely implemented by an LSI such as an integrated circuit, and each process described in each embodiment can be partially or entirely controlled by the same LSI or a combination of LSIs. The LSI can be formed as a chip alone, or a chip can be formed to include a part or all of the functional blocks. The LSI may include data inputs and outputs coupled thereto. Depending on the difference in integration, the LSI may be referred to as an IC, a system LSI, a super LSI, or an ultra LSI. However, the technology for implementing an integrated circuit is not limited to the LSI, and can be implemented by using a dedicated circuit, a general-purpose processor, or a dedicated processor. In addition, an FPGA (field programmable gate array) that can be programmed after the manufacture of the LSI or a reconfigurable processor in which the connection and setting of the circuit unit arranged inside the LSI can be reconfigured can be used. The present disclosure can be implemented as digital processing or analog processing. If future integrated circuit technology replaces LSI as a result of the advancement of semiconductor technology or other derivative technologies, future integrated circuit technology can be used to integrate functional blocks. Biotechnology can also be applied.

[0196] The present disclosure may be implemented by any kind of equipment, device, or system having a communication function, which is referred to as a communication device.

[0197] Some non-limiting examples of such communication devices include phones (e.g., cellular (cell) phones, smart phones), tablets, personal computers (PCs) (e.g., laptops, desktops, netbooks), cameras (e.g., digital still / video cameras), digital players (e.g., digital audio / video players), wearable devices (e.g., wearable cameras, smart watches, tracking devices), game consoles, digital book readers, telemedicine / telehealth (e.g., telehealth and medical) devices, and vehicles providing communication functionality (e.g., cars, airplanes, ships), and various combinations thereof.

[0198] The communication devices are not limited to portable or movable, and may also include any kind of device, equipment, or system that is non-portable or fixed, such as smart home devices (e.g., appliances, lighting, smart meters, control panels), vending machines, and any other "things" in the network of the "Internet of Things (IoT)".

[0199] Communications may include exchanging data via, for example, cellular systems, wireless LAN systems, satellite systems, etc., and various combinations thereof.

[0200] The communication apparatus may include a device such as a controller or a sensor coupled to a communication device that performs the communication functions described in the present disclosure. For example, the communication apparatus may include a controller or a sensor that generates a control signal or a data signal used by the communication device that performs the communication functions of the communication apparatus.

[0201] The communication devices may also include infrastructure such as base stations, access points, and any other devices, equipment, or systems that communicate with or control devices such as those in the above non-limiting examples.

[0202] It shall be understood that, although some properties of the various embodiments have been described with reference to an apparatus, corresponding properties also apply to the method of the various embodiments, and vice versa.

[0203] Further described below are statements applicable to various embodiments of the present invention:

[0204] Statement 1. A communication device comprising: a circuit that determines one or more frequency components of a spectrum extension (SE) portion and one or more other frequency components of a non-SE portion of a signal based on control information related to the SE portion; generates a compensation signal based on the one or more frequency components of the SE portion; and generates a reduced peak signal based on the compensation signal; and a transmitter that transmits the reduced peak signal.

[0205] Statement 2. The communication device of statement 1, wherein the reduced peak signal is generated by adding a compensation signal to a signal shaped by a frequency domain spectral shaping (FDSS) filter.

[0206] Statement 3. The communication device of statement 2, wherein the compensation signal includes a zero-valued component in a non-SE portion.

[0207] Statement 4. The communication apparatus of statement 1, wherein determining the one or more other frequency components of the non-SE portion comprises multiplying output information from a discrete Fourier transform (DFT) process with coefficients of a frequency domain spectral shaping (FDSS) filter.

[0208] Statement 5. A communication device according to Statement 4, wherein determining one or more frequency components for the SE part includes: copying an upper portion of the output information to the end of a lower portion of the non-SE part, and copying the lower portion of the output information to the end of an upper portion of the non-SE part; and forming the SE part by multiplying the copied upper and lower portions of the output information with coefficients of the FDSS filter.

[0209] Statement 6. The communication apparatus of statement 1, wherein the SE portion and the non-SE portion each include one or more pluralities of subcarriers in the frequency domain.

[0210] Statement 7. The communications apparatus of statement 1 wherein the circuitry is further configured to determine a transport block size (TBS) for uplink transmissions based on a total number of subcarriers in the non-SE portion.

[0211] Statement 8. The communication apparatus of statement 6 wherein the non-SE portion includes more subcarriers than the SE portion.

[0212] Statement 9. The communication apparatus of statement 6 wherein the SE portion is less than or equal to a size of the plurality of subcarriers.

[0213] Statement 10. The communication apparatus of statement 6 wherein the SE portion includes more subcarriers for high modulation orders than subcarriers for low modulation orders.

[0214] Statement 11. The communication device of statement 5, wherein the circuit is further configured to apply a higher demodulation reference signal (DMRS) density magnitude to the upper and lower portions than the non-SE portion before copying the upper and lower portions of the output information.

[0215] Statement 12. The communication apparatus of statement 5, wherein the circuitry is further configured to: apply a DMRS density size different from a DMRS density size of a non-SE portion to the formed SE portion.

[0216] Statement 13. The communication apparatus of statement 1 further comprising a receiver that receives control information via downlink control information (DCI), medium access control control element (MAC CE), or radio resource control (RRC), or via an implicit indication based on another signaling or configuration from a base station.

[0217] Statement 14. The communications device of statement 1 wherein the circuitry is configured to determine the SE portion based on the non-SE portion.

[0218] Statement 15. The communication apparatus of statement 14, wherein the determined size of the SE portion becomes smaller as the size of the non-SE portion becomes larger.

[0219] Statement 16. The communication apparatus of statement 14, wherein the determined ratio of the size of the SE portion to the size of the non-SE portion decreases as the size of the non-SE portion increases.

[0220] Statement 17. The communication apparatus of statement 1, wherein the control information indicates that the non-SE portion is a legacy frequency domain resource allocation (FDRA) specified in a technical specification. , and the circuit is also configured to: determine the SE part as multiple subcarriers or a number of physical resource blocks (PRBs) according to the indication in the control information, or determine the SE part based on the modulation order or size of the traditional FDRA.

[0221] Statement 18. The communication device of statement 1, wherein the circuit is configured based on a conventional FDRA ( ) and the parameters indicated in the control information To determine the SE part, the SE part is .

[0222] Statement 19. The communication device of statement 18, wherein the determined bandwidth of the SE portion is wider as the bandwidth of the non-SE portion is wider.

[0223] Statement 20. The communication device of statement 18, wherein the circuit is configured to: The non-SE part is determined as , or if the SE part and the non-SE part are restricted to , then the non-SE part is determined as .

[0224] Statement 21. The communication device of statement 1, wherein the control information indicates a parameter pair ( ), Indicates one or more subcarriers used for the SE part, indicating one or more other subcarriers for the non-SE portion, and the circuit is configured to be based on and to determine the SE part and the non-SE part.

[0225] Statement 22. The communication device of statement 1 wherein the circuit is configured to determine a size of the SE portion based on a frequency range (FR) of the SE portion according to the control information.

[0226] Statement 23. The communications device of statement 1 wherein the circuitry is configured to determine the size of the SE portion based on one or a combination of spectral efficiency or maximum power reduction / peak to average power ratio (MPR / PAPR) values.

[0227] Statement 24. The communications apparatus of statement 1 wherein the circuitry is further configured to determine the SE portion as a UE-specific value, or a UE type-specific value, or a serving cell-specific value based on the control information.

[0228] Statement 25. A base station comprising: circuitry that generates control information related to a spectrum extension (SE) portion and a non-SE portion of a signal, the control information indicating resource allocation in a frequency domain for the SE portion and the non-SE portion; and a transmitter that transmits the control information to a communication device.

[0229] Statement 26. A communication method comprising: determining one or more frequency components of a spectrum extension (SE) portion and one or more other frequency components of a non-SE portion of a signal based on control information related to the SE portion; generating a compensation signal based on the one or more frequency components of the SE portion; and generating a reduced peak signal based on the compensation signal; and transmitting the reduced peak signal.

[0230] It will be appreciated by those skilled in the art that many changes and / or modifications may be made to the disclosure shown in the specific embodiments without departing from the spirit or scope of the disclosure as broadly described. Therefore, the present embodiments are to be considered in all aspects as illustrative and not restrictive.

Claims

1. A communication device, comprising: Circuit: determining, based on control information relating to a spectrum extension (SE) portion and a non-SE portion of a signal, one or more frequency components of the SE portion and one or more other frequency components of the non-SE portion; generating a compensation signal based on the one or more frequency components of the SE portion; as well as generating a reduced peak signal based on the compensation signal; as well as A transmitter transmits the peak reduction signal.

2. The communication device according to claim 1, wherein: The reduced-peak signal is generated by adding the compensation signal to a signal shaped by a frequency domain spectral shaping (FDSS) filter.

3. The communication device according to claim 1, wherein: Determining the one or more other frequency components of the non-SE portion comprises: The output information from the discrete Fourier transform (DFT) process is multiplied with the coefficients of the frequency domain spectral shaping (FDSS) filter.

4. The communication device according to claim 1, wherein: The SE part and the non-SE part respectively include one or more multiple subcarriers in the frequency domain.

5. The communication device according to claim 1, wherein: The circuit is further configured to determine a transport block size (TBS) for uplink transmission based on a total number of subcarriers in the non-SE portion.

6. The communication device according to claim 1, wherein: The non-SE part includes more subcarriers than the SE part.

7. The communication device of claim 1, further comprising a receiver that receives the control information via downlink control information (DCI), medium access control control element (MAC CE), or radio resource control (RRC), or via an implicit indication based on another signaling or configuration from a base station.

8. The communication device according to claim 1, wherein: The circuit is configured to determine the SE portion based on the non-SE portion.

9. The communication device according to claim 1, wherein: The control information indicates that the non-SE part is a legacy frequency domain resource allocation (FDRA) specified in the technical specification ( ), and the circuit is further configured to: determine the SE part as multiple subcarriers or a number of physical resource blocks (PRBs) according to an indication in the control information, or determine the SE part based on a modulation order or size of the traditional FDRA.

10. The communication device according to claim 1, wherein: The circuit is configured as based on the conventional FDRA ( ) and the parameters indicated in the control information ( ) to determine the SE part, the SE part is .

11. The communication device according to claim 1, wherein: The control information indicates a parameter pair ( ), indicating one or more subcarriers to be used for the SE part, indicating one or more other subcarriers for the non-SE portion, and the circuit is configured to respectively and To determine the SE part and the non-SE part.

12. The communication device according to claim 1, wherein: The circuit is configured to determine a size of the SE portion based on a frequency range (FR) of the SE portion according to the control information.

13. The communication device according to claim 1, wherein: The circuit is configured to determine a size of the SE portion based on one of spectral efficiency or maximum power reduction / peak-to-average power ratio (MPR / PAPR) values ​​or a combination thereof.

14. A base station, comprising: circuitry that generates control information related to a spectrum extension (SE) portion and a non-SE portion of a signal, the control information indicating resource allocation in a frequency domain for the SE portion and the non-SE portion; and A transmitter sends the control information to a communication device.

15. A communication method, comprising: determining, based on control information relating to a spectrum extension (SE) portion and a non-SE portion of a signal, one or more frequency components of the SE portion and one or more other frequency components of the non-SE portion; generating a compensation signal based on the one or more frequency components of the SE portion; as well as generating a reduced peak signal based on the compensation signal; as well as The peak reduction signal is sent.

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