CN116711244A - Modulation and coding scheme capability for high-band wireless communications - Google Patents

Abstract

Aspects presented herein may enable a UE to limit MCS and/or K1 offset for communicating with a base station to a threshold based at least in part on an SCS for communicating. In some aspects, the UE limits at least one of MCS or K1 offset based on a subcarrier spacing selected for communication with the base station: the MCS is limited to be less than or equal to an MCS threshold, or the K1 offset, which is the number of slots between receiving DL data and transmitting ACK/NACK feedback, is limited to be greater than or equal to a K1 offset threshold. Based on at least one of the following two conditions: the MCS is less than or equal to the MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, and the UE communicates with the base station.

Description

Modulation and coding scheme capability for high-band wireless communications

Cross Reference to Related Applications

The present application claims the benefit and priority of U.S. provisional application Ser. No. 63/137,656 entitled "MODULATION AND CODING SCHEME CAPABILITY FOR HIGH BAND WIRELESS COMMUNICATION" filed on 1 month 14 of 2021 and U.S. patent application Ser. No. 17/646,985 entitled "MODULATION AND CODING SCHEME CAPABILITY FOR HIGH BAND WIRELESS COMMUNICATION" filed on 4 month 1 of 2022, the entire contents of which are expressly incorporated herein by reference.

Technical Field

The present disclosure relates generally to communication systems, and more particularly, to wireless communication including a Modulation and Coding Scheme (MCS).

Background

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. A typical wireless communication system may employ multiple-access techniques, which may employ techniques capable of supporting communication with multiple users by sharing the available system resources. Examples of such multiple-access techniques 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

These multiple access techniques are employed in various telecommunications standards in order to provide a common protocol that enables different wireless devices to communicate at the urban, national, regional, and even global levels. An example telecommunications standard is 5G New Radio (NR). The 5G NR is part of the continuous mobile broadband evolution promulgated by the third generation partnership project (3 GPP) to meet new requirements regarding latency, reliability, security, and scalability (e.g., internet of things (IoT)), among others. The 5G NR includes services associated with enhanced mobile broadband (emmbb), large-scale machine type communication (emtc), and ultra-reliable low-latency communication (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements are needed for the 5G NR technology. These improvements should also be applicable to other multiple access techniques and telecommunication standards employing these techniques.

Disclosure of Invention

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects of the invention. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

In one aspect of the disclosure, a method, computer-readable medium, and apparatus are provided. The apparatus limits at least one of MCS or K1 offset based on a subcarrier spacing selected for communication with the base station: the MCS is limited to be less than or equal to an MCS threshold or the K1 offset is limited to be greater than or equal to a K1 offset threshold, the K1 offset being the number of slots between receiving DL data and transmitting ACK/NACK feedback. Based on at least one of the following two conditions: the MCS is less than or equal to an MCS threshold or the K1 offset is greater than or equal to a K1 offset threshold, the apparatus communicating with the base station.

In one aspect of the disclosure, a method, computer-readable medium, and apparatus are provided. The apparatus receives a capability message from a User Equipment (UE) indicating an MCS or a minimum K1 offset that the UE can support, the maximum MCS or the minimum K1 offset being based on a subcarrier spacing. Based on at least one of the following two conditions: the MCS is less than or equal to a maximum MCS or a K1 offset is greater than or equal to a minimum K1 offset, and the apparatus communicates with the UE.

In one aspect of the disclosure, a method, computer-readable medium, and apparatus for wireless communication at a UE are provided. The apparatus determines a subcarrier spacing for communicating with a base station. Based on the determined subcarrier spacing, the apparatus determines to limit at least one of MCS or K1 offset: the MCS is limited to be less than or equal to an MCS threshold or the K1 offset is limited to be greater than or equal to a K1 offset threshold, where the K1 offset is the number of slots between receiving Downlink (DL) data and transmitting ACK/NACK feedback. Based on at least one of the following two conditions: the MCS is less than or equal to the determined MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, and the apparatus communicates with the base station.

In one aspect of the disclosure, a method, computer-readable medium, and apparatus for wireless communication at a base station are provided. The apparatus receives a capability message from the UE indicating a maximum MCS or a minimum K1 offset that the UE can support, the maximum MCS or the minimum K1 offset being based on the subcarrier spacing. Based on at least one of the following two conditions: the MCS is less than or equal to a maximum MCS or a K1 offset is greater than or equal to a minimum K1 offset, and the apparatus communicates with the UE.

To the accomplishment of the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed and the description is intended to include all such aspects and their equivalents.

Drawings

Fig. 1 is a diagram illustrating an example of a wireless communication system and access network in accordance with aspects presented herein.

Fig. 2A is a diagram illustrating an example of a first frame according to aspects of the present disclosure.

Fig. 2B is a diagram illustrating an example of an intra-subframe DL channel according to aspects of the present disclosure.

Fig. 2C is a diagram illustrating an example of a second frame in accordance with aspects of the present disclosure.

Fig. 2D is a diagram illustrating an example of an intra-subframe UL channel in accordance with aspects of the present disclosure.

Fig. 3 is a diagram showing an example of a base station and a User Equipment (UE) in an access network.

Fig. 4 is a communication flow illustrating an example of an MCS limiting communication between a UE and a base station based on SCS according to aspects of the present disclosure.

Fig. 5 is a communication flow illustrating an example of a HARQ feedback process.

Fig. 6 is a communication flow illustrating an example of limiting a K1 offset of communication between a UE and a base station based on an SCS or an MCS associated with the SCS, in accordance with aspects of the present disclosure.

Fig. 7 is a flow chart of a wireless communication method in accordance with aspects presented herein.

Fig. 8 is a diagram illustrating an example of a hardware implementation of an example apparatus in accordance with aspects presented herein.

Fig. 9 is a flow chart of a wireless communication method in accordance with aspects presented herein.

Fig. 10 is a diagram illustrating an example of a hardware implementation of an example apparatus in accordance with aspects presented herein.

Fig. 11 is a flow chart of a wireless communication method in accordance with aspects presented herein.

Fig. 12 is a diagram illustrating an example of a hardware implementation of an example apparatus in accordance with aspects presented herein.

Detailed Description

The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. It will be apparent, however, to one skilled in the art that the concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

Several aspects of the telecommunications system will now be presented with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and are illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Implementation of such elements as hardware or software depends upon the particular application and design constraints imposed on the overall system.

As an example, an element or any portion of an element or any combination of elements may be implemented as a "processing system" comprising one or more processors. Examples of processors include microprocessors, microcontrollers, graphics Processing Units (GPUs), central Processing Units (CPUs), application processors, digital Signal Processors (DSPs), reduced Instruction Set Computing (RISC) processors, system on a chip (SoC), baseband processors, field Programmable Gate Arrays (FPGAs), programmable Logic Devices (PLDs), state machines, logic gates, discrete hardware circuits, and other suitable hardware configured to perform the various functions described in this disclosure. One or more processors in a processing system may execute software. Software should be construed broadly to mean instructions, instruction sets, code segments, program code, programs, subroutines, software components, applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

Thus, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded on a computer-readable medium as one or more instructions or code. Computer readable media includes computer storage media. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable storage media can comprise Random Access Memory (RAM), read-only memory (ROM), electrically Erasable Programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the foregoing types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

While aspects and embodiments are described in this disclosure by way of illustration of some examples, those skilled in the art will appreciate that additional implementations and use cases may occur in many different arrangements and scenarios. The innovations described herein may be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, embodiments and/or uses may be via integrated chip implementations and other non-module component based devices (e.g., end user devices, vehicles, communication devices, computing devices, industrial devices, retail/procurement devices, medical devices, artificial Intelligence (AI) enabled devices, etc.). While some examples may or may not be specific to use cases or applications, various applicability of the described innovations may occur. Embodiments may range from chip-level or modular components to non-modular, non-chip-level embodiments, to aggregate, distributed, or Original Equipment Manufacturer (OEM) devices or systems that incorporate one or more aspects of the described innovations. In some practical arrangements, devices incorporating the described aspects and features may also include additional components and features to implement and practice the claimed and described aspects. For example, the transmission and reception of wireless signals must include a number of components (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, one or more processors, interleavers, adders/summers, etc.) for analog and digital purposes. It is intended that the innovations described herein may be practiced in devices, chip-level components, systems, distributed arrangements, aggregated or non-aggregated components, end-user devices, etc., of various different sizes, shapes, and configurations.

Fig. 1 is a diagram illustrating an example of a wireless communication system and an access network 100. A wireless communication system, also referred to as a Wireless Wide Area Network (WWAN), includes a base station 102, a UE 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G core (5 GC)). Base station 102 may include a macrocell (high power cellular base station) and/or a small cell (low power cellular base station). The macrocell includes a base station. Small cells include femto cells, pico cells, and micro cells.

In certain aspects, the UE 104 may include an MCS/K1 threshold determination component 198 configured to limit MCS and/or K1 offset for communicating with the base station to a threshold based at least in part on the SCS for communicating. In one configuration, MCS/K1 threshold determination component 198 may be configured to determine a subcarrier spacing for communicating with a base station. In such a configuration, based on the determined subcarrier spacing, the MCS/K1 threshold determination component 198 may determine to limit at least one of the MCS or K1 offset: the MCS is limited to be less than or equal to an MCS threshold or the K1 offset is limited to be greater than or equal to a K1 offset threshold, where the K1 offset is the number of slots between receiving DL data and sending acknowledgement, ACK/NACK, feedback. In such a configuration, at least one of the following two cases is based on: the MCS is less than or equal to the determined MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, and the MCS/K1 threshold determination component 198 may communicate with the base station.

In certain aspects, the base station 102/180 may include an MCS/K1 thresholding component 199 configured to communicate with a UE (e.g., UE 104) based on an MCS and/or K1 offset indicated by the UE. In one configuration, the MCS/K1 thresholding component 199 may be configured to receive a capability message from the UE indicating a maximum MCS or minimum K1 offset that the UE can support, the maximum MCS or minimum K1 offset based on the subcarrier spacing. In such a configuration, at least one of the following two cases is based on: the MCS is less than or equal to a maximum MCS or the K1 offset is greater than or equal to a minimum K1 offset, and the MCS/K1 threshold processing component 199 may communicate with the UE.

A base station 102 configured for 4G LTE, collectively referred to as evolved Universal Mobile Telecommunications System (UMTS) terrestrial radio access network (E-UTRAN), may interface with EPC 160 over a first backhaul link 132 (e.g., an S1 interface). The base station 102 for 5G NR, collectively referred to as a next generation RAN (NG-RAN), may interface with the core network 190 over the second backhaul link 184. Base station 102 may perform, among other functions, one or more of the following: user data transfer, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio Access Network (RAN) sharing, multimedia Broadcast Multicast Services (MBMS), subscriber and device tracking, RAN Information Management (RIM), paging, positioning, and delivery of warning messages. The base stations 102 may communicate with each other directly or indirectly (e.g., through the EPC 160 or the core network 190) over a third backhaul link 134 (e.g., an X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless.

The base station 102 may communicate wirelessly with the UE 104. Each base station 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102 'may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network comprising both small cells and macro cells may be referred to as a heterogeneous network. The heterogeneous network may also include a home evolved node B (eNB) (HeNB), which may provide services to a restricted group known as a Closed Subscriber Group (CSG). The communication link 120 between the base station 102 and the UE 104 may include Uplink (UL) (also referred to as reverse link) transmissions from the UE 104 to the base station 102 and/or Downlink (DL) (also referred to as forward link) transmissions from the base station 102 to the UE 104. Communication link 120 may use multiple-input multiple-output (MIMO) antenna processes including spatial multiplexing, beamforming, and/or transmit diversity. The communication link may be through one or more carriers. The base station 102/UE 104 may use up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc., MHz) of spectrum bandwidth for transmission in each direction for each carrier allocated in carrier aggregation up to a total of yxmhz (x component carriers). The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL/UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels such as a Physical Sidelink Broadcast Channel (PSBCH), a Physical Sidelink Discovery Channel (PSDCH), a Physical Sidelink Shared Channel (PSSCH), and a Physical Sidelink Control Channel (PSCCH). D2D communication may be performed through various wireless D2D communication systems, such as WiMedia, bluetooth, zigBee, wi-Fi, LTE, or NR based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard.

The wireless communication system may also include a Wi-Fi Access Point (AP) 150 that communicates with Wi-Fi Stations (STAs) 152 via a communication link 154, such as in the 5GHz unlicensed spectrum or the like. When communicating in the unlicensed spectrum, STA 152/AP 150 may perform Clear Channel Assessment (CCA) prior to communication to determine whether the channel is available.

The small cell 102' may operate in licensed and/or unlicensed spectrum. When operating in unlicensed spectrum, the small cell 102' may employ NR and use the same unlicensed spectrum (e.g., 5GHz, etc.) as used by the Wi-Fi AP 150. Small cells 102' using NRs in unlicensed spectrum may increase coverage and/or increase capacity of the access network.

The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc., based on frequency/wavelength. In 5G NR, two initial operating bands have been identified as frequency range designation FR1 (410 mhz 7.125 ghz) and FR2 (24.25 ghz 52.6 ghz). Although a portion of FR1 is greater than 6GHz, FR1 is commonly (alternatively) referred to in various documents and articles as the "below 6 GHz" band. FR2 sometimes suffers from similar naming problems, although unlike the Extremely High Frequency (EHF) band (30 GHz-300 GHz) identified by the International Telecommunications Union (ITU) as the "millimeter wave" band, FR2 is often (alternatively) referred to in documents and articles as the "millimeter wave" band.

The frequency between FR1 and FR2 is commonly referred to as the intermediate frequency. Recent 5G NR studies have identified the operating band of these mid-band frequencies as frequency range designation FR3 (7.125GHz 24.25GHz). The frequency band falling within FR3 may inherit FR1 characteristics and/or FR2 characteristics and may therefore effectively extend the characteristics of FR1 and/or FR2 to intermediate frequency. In addition, higher frequency bands are currently being explored to extend 5G NR operation above 52.6 GHz. For example, three higher operating frequency bands have been identified as frequency range designation FR2-2 (52.6 GHz 71 GHz), FR4 (71 GHz-114.25 GHz) and FR5 (114.25 GHz-300 GHz). Each of these higher frequency bands falls within the EHF frequency band.

In view of the above, unless explicitly stated otherwise, it should be understood that the term "below 6 GHz" and the like (if used herein) may broadly represent frequencies that may be less than 6GHz, frequencies that may be within FR1, or frequencies that may include intermediate frequency ranges. Furthermore, unless explicitly stated otherwise, it is to be understood that the term "millimeter wave" or the like (if used herein) may broadly refer to frequencies that may include intermediate frequency bands, may be within FR2, FR4, or FR2-2 and/or FR5, or may be within the EHF band.

Base station 102, whether small cell 102' or a large cell (e.g., macro base station), may include and/or be referred to as an eNB, g-node B (gNB), or another type of base station. Some base stations, such as the gNB 180, may operate at millimeter wave frequencies and/or communicate with the UE 104 at near millimeter wave frequencies in the traditional frequency spectrum below 6 GHz. When the gNB 180 operates at or near millimeter wave frequencies, the gNB 180 may be referred to as a millimeter wave base station. Millimeter-wave base station 180 may utilize beamforming 182 with UE 104 to compensate for path loss and short distance. The base station 180 and the UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and/or antenna arrays, to facilitate beamforming.

The base station 180 may transmit the beamformed signals to the UE 104 in one or more transmit directions 182'. The UE 104 may receive the beamformed signals from the base station 180 in one or more receive directions 182 ". The UE 104 may also transmit the beamformed signals in one or more transmit directions to the base station 180. The base station 180 may receive the beamformed signals from the UE 104 in one or more receive directions. The base stations 180/UEs 104 may perform beam training to determine the best reception and transmission direction for each of the base stations 180/UEs 104. The transmit and receive directions of the base station 180 may be the same or different. The transmit and receive directions of the UE 104 may be the same or different.

EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a serving gateway 166, a Multimedia Broadcast Multicast Service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a Packet Data Network (PDN) gateway 172. The MME 162 may communicate with a Home Subscriber Server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are communicated through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation as well as other functions. The PDN gateway 172 and BM-SC 170 are connected to an IP service 176.IP services 176 may include the internet, intranets, IP Multimedia Subsystem (IMS), PS streaming services, and/or other IP services. The BM-SC 170 may provide functionality for MBMS user service configuration and delivery. The BM-SC 170 may be used as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to allocate MBMS traffic to base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service and may be responsible for session management (start/stop) and collecting charging information related to eMBMS.

The core network 190 may include access and mobility management functions (AMFs) 192, other AMFs 193, session Management Functions (SMFs) 194, and User Plane Functions (UPFs) 195. The AMF 192 may communicate with a Unified Data Management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. In general, AMF 192 provides QoS flows and session management. All user Internet Protocol (IP) packets are transmitted through the UPF 195. The UPF 195 provides UE IP address assignment as well as other functions. The UPF 195 is connected to an IP service 197. The IP services 197 may include the internet, intranets, IP Multimedia Subsystem (IMS), packet Switched (PS) streaming (PSs) services, and/or other IP services.

A base station may include and/or be referred to as a gNB, a node B, eNB, an access point, a base station transceiver, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a Transmit Receive Point (TRP), or some other suitable terminology. The base station 102 provides an access point for the UE 104 to the EPC 160 or the core network 190. Examples of UEs 104 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a notebook, a Personal Digital Assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game, a tablet, a smart device, a wearable device, a vehicle, an electric meter, an air pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, air pumps, toasters, vehicles, heart monitors, etc.). The UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, or some other suitable terminology. In some scenarios, the term UE may also apply to one or more companion devices, e.g., in a device constellation arrangement. One or more of these devices may access the network together and/or individually.

Fig. 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure. Fig. 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. Fig. 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure. Fig. 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be Frequency Division Duplex (FDD) in which subframes within a particular set of subcarriers (carrier system bandwidth) are dedicated for DL or UL, or Time Division Duplex (TDD) in which subframes within a set of subcarriers are dedicated for both DL and UL for a particular set of subcarriers (carrier system bandwidth). In the example provided in fig. 2A and 2C, it is assumed that the 5G NR frame structure is TDD, where subframe 4 is configured with slot format 28 (mainly DL), where D is DL, U is UL, and F is flexibly used between DL/UL, and subframe 3 is configured with slot format 1 (all UL). Although subframes 3, 4 are shown in slot formats 1 and 28, respectively, any particular subframe may be configured with any of a variety of available slot formats 0-61. Slot formats 0 and 1 are all DL and all UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The slot format is configured for the UE (either dynamically through DL Control Information (DCI) or semi-statically/statically through Radio Resource Control (RRC) signaling) through a received Slot Format Indicator (SFI). Note that the following description also applies to the 5G NR frame structure of TDD.

Fig. 2A-2D illustrate frame structures, and aspects of the present disclosure may be applicable to other wireless communication technologies, which may have different frame structures and/or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more slots. A subframe may also include a small slot, which may include 7, 4, or 2 symbols. Each slot may include 14 or 12 symbols depending on whether the Cyclic Prefix (CP) is normal or extended. For the normal CP, each slot may include 14 symbols, and for the extended CP, each slot may include 12 symbols. The symbols on the DL may be CP Orthogonal Frequency Division Multiplexing (OFDM) (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or Discrete Fourier Transform (DFT) -spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to single stream transmission only). The number of slots within a subframe is based on CP and digital parameters (numerology). The digital parameters define the subcarrier spacing (SCS) and effectively the slot length/duration, which is equal to 1/SCS.

For a normal CP (14 symbols/slot), different digital parameters μ (0 to 4) allow 1, 2, 4, 8 and 16 slots, respectively, per subframe. For extended CP, digital parameter 2 allows 4 slots per subframe. Thus, for the normal CP and digital parameter μ, there are 14 symbols per slot and 2 per subframe ^μ And each time slot. The subcarrier spacing may be equal to 2 ^μ *15kHz, where μ is the digital parameter 0 to 4. Likewise, the digital parameter μ=0 has a subcarrier spacing of 15kHz, and the digital parameter μ=4 has a subcarrier spacing of 240 kHz. The symbol length/duration is inversely proportional to the subcarrier spacing. Fig. 2A to 2D provide examples of a normal CP for which there are 14 symbols per slot and 4 slots per subframe for the digital parameter μ=2. The slot duration is 0.25ms, the subcarrier spacing is 60kHz, and the symbol duration is approximately 16.67 mus. Within the frame set there may be one or more different bandwidth parts (BWP) (see fig. 2B), which are frequency division multiplexed. Each BWP may have a specific digital parameter and CP (normal or extended).

The resource grid may be used to represent a frame structure. Each slot includes Resource Blocks (RBs) (also referred to as Physical RBs (PRBs)) that extend for 12 consecutive subcarriers. The resource grid is divided into a plurality of Resource Elements (REs). The number of bits carried by each RE depends on the modulation scheme.

As illustrated in fig. 2A, some REs carry a reference (pilot) signal (RS) for the UE. The RSs may include demodulation RSs (DM-RSs) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RSs) for channel estimation at the UE. The RSs may also include beam measurement RSs (BRSs), beam Refinement RSs (BRRSs), and phase tracking RSs (PT-RSs).

Fig. 2B shows an example of various DL channels within a subframe of a frame. A Physical Downlink Control Channel (PDCCH) carries DCI in one or more Control Channel Elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six RE groups (REGs), each REG including twelve consecutive REs in an OFDM symbol of an RB. The PDCCH within one BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during a PDCCH monitoring occasion on CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWP may be located at higher and/or lower frequencies over the channel bandwidth. The Primary Synchronization Signal (PSS) may be within symbol 2 of a particular subframe of a frame. The UE 104 uses PSS to determine subframe/symbol timing and physical layer identity. The Secondary Synchronization Signal (SSS) may be within symbol 4 of a particular subframe of a frame. The UE uses SSS to determine the physical layer cell identification group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE may determine a Physical Cell Identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. A Physical Broadcast Channel (PBCH) carrying a Master Information Block (MIB) may be logically grouped with PSS and SSS to form a Synchronization Signal (SS)/PBCH block (also referred to as an SS block (SSB)). The MIB provides a number of RBs and System Frame Numbers (SFNs) in the system bandwidth. The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted over the PBCH, such as System Information Blocks (SIBs) and paging messages.

As illustrated in fig. 2C, some REs carry DM-RS for channel estimation at the base station (indicated as R for one particular configuration, but other DM-RS configurations are also possible). The UE may transmit DM-RS for a Physical Uplink Control Channel (PUCCH) and DM-RS for a Physical Uplink Shared Channel (PUSCH). PUSCH DM-RS may be transmitted in the previous or two symbols of PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and depending on the specific PUCCH format used. The UE may transmit a Sounding Reference Signal (SRS). The SRS may be transmitted in the last symbol of the subframe. The SRS may have a comb structure, and the UE may transmit the SRS on one of the comb. The base station may use SRS for channel quality estimation to enable frequency dependent scheduling on UL.

Fig. 2D shows examples of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries Uplink Control Information (UCI) such as a scheduling request, a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a Rank Indicator (RI), and hybrid automatic repeat request (HARQ) Acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and/or Negative ACKs (NACKs)). PUSCH carries data and may additionally be used to carry Buffer Status Reports (BSR), power Headroom Reports (PHR), and/or UCI.

Fig. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In DL, IP packets from EPC 160 may be provided to controller/processor 375. Controller/processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a Radio Resource Control (RRC) layer, and layer 2 includes a Service Data Adaptation Protocol (SDAP) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, and a Medium Access Control (MAC) layer. Controller/processor 375 provides RRC layer functions associated with broadcast of system information (e.g., MIB and SIBs), RRC connection control (e.g., RRC connection paging, RRC connection setup, RRC connection modification, and RRC connection release), inter-Radio Access Technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression/decompression, security (ciphering, deciphering, integrity protection, integrity verification) and handover support functions; RLC layer functions associated with upper layer Packet Data Unit (PDU) delivery, error correction by ARQ, concatenation, segmentation and reassembly of RLC Service Data Units (SDUs), re-segmentation of RLC data PDUs, and re-ordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and delivery channels, multiplexing of MAC SDUs to Transport Blocks (TBs), de-multiplexing of MAC SDUs from TBs, scheduling information reporting, error correction by HARQ, priority handling and logical channel prioritization.

A Transmit (TX) processor 316 and a Receive (RX) processor 370 implement layer 1 functions associated with various signal processing functions. Layer 1, including the Physical (PHY) layer, may include error detection on the delivery channel, forward Error Correction (FEC) decoding/decoding of the delivery channel, interleaving, rate matching, mapping to physical channels, modulation/demodulation of physical channels, and MIMO antenna processing. TX processor 316 processes the mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to OFDM subcarriers, multiplexed with reference signals (e.g., pilots) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying the time domain OFDM symbol stream. The OFDM stream is spatially pre-coded to produce a plurality of spatial streams. The channel estimates from channel estimator 374 may be used to determine coding and modulation schemes, as well as for spatial processing. The channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318 TX. Each transmitter 318TX may modulate a Radio Frequency (RF) carrier with a respective spatial stream for transmission.

At the UE 350, each receiver 354RX receives a signal via its respective antenna 352. Each receiver 354RX recovers information modulated onto an RF carrier and provides the information to the Receive (RX) processor 356.TX processor 368 and RX processor 356 implement layer 1 functions associated with various signal processing functions. The RX processor 356 may spatially process the information to recover any spatial streams that may be directed to the UE 350. If multiple spatial streams are to the UE 350, they may be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a Fast Fourier Transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel. The data and control signals are then provided to a controller/processor 359 that implements layer 3 and layer 2 functions.

The controller/processor 359 can be associated with a memory 360 that stores program codes and data. Memory 360 may be referred to as a computer-readable medium. In the UL, controller/processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from EPC 160. The controller/processor 359 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.

Similar to the functionality described in connection with DL transmission by base station 310, controller/processor 359 provides RRC layer functions associated with system information (e.g., MIB and SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions related to header compression/decompression and security (ciphering, deciphering, integrity protection and integrity verification); RLC layer functions associated with upper layer PDU delivery, error correction by ARQ, concatenation, segmentation and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and re-ordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and delivery channels, multiplexing of MAC SDUs to TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction by HARQ, priority handling and logical channel prioritization.

Channel estimates derived by channel estimator 358 from reference signals or feedback transmitted by base station 310 may be used by TX processor 368 to select appropriate coding and modulation schemes and facilitate spatial processing. The spatial streams generated by TX processor 368 may be provided to different antenna 352 via separate transmitters 354 TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.

UL transmissions are processed at base station 310 in a manner similar to that described in connection with the receiver functionality at UE 350. Each receiver 318RX receives a signal through a respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

The controller/processor 375 may be associated with a memory 376 that stores program codes and data. Memory 376 may be referred to as a computer-readable medium. In the UL, controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from UE 350. IP packets from controller/processor 375 may be provided to EPC 160. Controller/processor 375 is also responsible for error detection using ACK and/or NACK protocols to support HARQ operations.

At least one of TX processor 368, RX processor 356, and controller/processor 359 may be configured to perform various aspects related to MCS/K1 threshold determination component 198 of fig. 1.

At least one of TX processor 316, RX processor 370, and controller/processor 375 may be configured to perform various aspects related to MCS/K1 threshold processing component 199 of fig. 1.

With the continued development of wireless technology, higher frequency bands above FR2 (e.g., 24.25GHz 52.6 GHz) may be used, including a frequency band between 52.6GHz 71GHz, and a terahertz-below (THz-below) frequency band above 140GHz or between 300GHz and 3THz, and the like. A narrower beam structure can be achieved for a higher frequency radio technology, such as a frequency range below THz, than for FR2 or below, because more radiating elements can be placed in each given area of the antenna due to the smaller wavelength. The higher frequency band may have a short delay spread (e.g., a few nanoseconds) and may be converted to a coherence frequency bandwidth of tens of MHz. Thus, a higher operating frequency band may enable a UE to communicate with a base station or with another UE using a larger bandwidth with higher throughput. However, due to frequency oscillator mismatch between the transmitting wireless device and the receiving wireless device, transmissions between the wireless devices using greater bandwidth and/or at higher operating frequencies may experience higher phase noise. As the carrier frequency increases, the phase noise effects between wireless devices may become more severe, which may lead to Common Phase Error (CPE) and/or inter-carrier interference (ICI). CPE may cause the same rotation of the received symbols in each subcarrier, while ICI may cause loss of orthogonality between subcarriers.

To combat or reduce the effects caused by phase noise, such as CPE and/or ICI, wireless devices may use a phase tracking reference signal (PT-RS) to track the phase and mitigate performance loss due to phase noise. For example, the receiving wireless device may estimate CPE and/or ICI for the transmission based on the PT-RS transmitted from the transmitting wireless device, and the receiving wireless device may perform CPE compensation and/or ICI compensation for the transmission based on the estimated CPE and/or ICI. In other examples, to combat phase noise, the subcarrier spacing (SCS) of OFDM symbols used by the wireless device may be increased (e.g., to 960kHz, 1920kHz, 3840kHz, etc.). For example, for larger SCS, the wireless device may more easily estimate and compensate for phase noise. Furthermore, CPE compensation may be computationally inexpensive compared to ICI compensation. In some examples, for higher frequency band (e.g., 52.6ghz 71ghz or higher) communications, the receiving wireless device may apply CPE compensation to transmissions involving large SCS (e.g., 960 KHz) to achieve sufficiently reasonable performance without applying ICI compensation. However, for transmissions involving a smaller SCS (e.g., 120 KHz), the receiving wireless device may be configured to also apply ICI compensation in order to achieve the same performance.

In some examples, a Radio Frequency (RF) module at a UE may be a major contributor to phase noise, and the quality of the RF module may vary from UE to UE. For example, for a UE with a higher quality RF module (e.g., an RF module with higher capabilities/capabilities), it is sufficient for the UE to apply CPE compensation for communications using most of the Modulation and Coding Scheme (MCS) values without applying ICI compensation. On the other hand, for UEs with lower quality RF modules (e.g., RF modules with lower capabilities/capabilities), the UE may be configured to apply ICI compensation for communications using some of the MCS values in order to achieve the same performance, such as for communications using 64 Quadrature Amplitude Modulation (QAM) MCSs. In addition to RF module quality, the processing capability of the UE may also limit the phase noise compensation capability of the UE. For example, the processing capability of the UE may enable the UE to perform CPE compensation but not ICI compensation, or the UE may perform ICI compensation using a limited number of filter taps, which may be insufficient for high MCSs.

Aspects presented herein may enable a UE to communicate with a base station using an MCS determined based at least in part on an SCS associated with the communication. When the SCS used to communicate with the base station is below the SCS threshold (e.g., if SCS < SCS threshold, MCS < MCS threshold), aspects presented herein may enable the UE to limit the MCS used to communicate with the base station to the MCS threshold. For example, if the UE is communicating with the base station in a higher frequency band (e.g., 52.6ghz 71 ghz), the UE may limit the MCS to a 16QAM MCS or lower when the SCS is 120KHz or lower. The MCS table may be defined or modified for the UE based on the SCS and/or the capabilities of the UE such that the UE may determine whether to limit the MCS and/or the MCS threshold based on the MCS table. Accordingly, aspects presented herein may enable a UE to limit the throughput achievable by the UE to reduce or avoid ICI, or when ICI is above an ICI threshold.

Fig. 4 is a communication flow 400 illustrating an example of an MCS limiting communications between a UE and a base station based on SCS, in accordance with aspects of the present disclosure. As shown in communication flow 400, at 406, UE 402 may determine SCS 408 to be used for communication with base station 404. The length of the OFDM symbol used for communication may be inversely proportional to the size of SCS 408 (e.g., OFDM symbol length=1/SCS), such that the size of the OFDM symbol may decrease as the SCS increases. For example, as shown in table 410, which illustrates examples of OFDM symbol lengths (e.g., tsymb) of different SCS, an OFDM symbol with SCS of 30KHz may have a symbol length of 33333 nanoseconds (ns), an OFDM symbol with SCS of 120KHz may have a symbol length of 8333.3ns, and an OFDM symbol with SCS of 960KHz may have a symbol length of 1041.7ns, etc.

At 412, the UE 402 may determine to limit an MCS (e.g., an MCS for communicating with the base station 404) to be less than or equal to an MCS threshold 414, where the MCS threshold 414 may be determined based at least in part on the determined SCS 408. For example, an MCS table 416 may be defined for the UE 402 (or modified from an existing table) that may indicate or specify MCS thresholds 414 that the UE 402 may use for different SCS. For example, at a particular frequency band (e.g., 52.6-71 GHz), if UE 402 selects 120KHz for SCS 408, MCS table 416 may indicate that a modulation scheme of 16QAM or less may be used for communication, and if UE 402 selects 960KHz for SCS 408, MCS table 416 may indicate that a modulation scheme of 256QAM or less may be used for communication, and so on. In some examples, the modulation scheme may include at least one of pi/2-BPSK, QPSK, 16QAM, 64QAM, and/or 256QAM, among others.

In one example, UE 402 may determine whether to limit the MCS to less than or equal to MCS threshold 414 based at least in part on whether ICI and/or a level of ICI is detected. For example, UE 402 may measure ICI for communications between UE 402 and base station 404. Then, if the UE 402 determines that ICI is greater than the ICI threshold, the UE 402 may determine to limit the MCS to be less than the MCS threshold 414.

At 418, the UE 402 may send a capability message 420 to the base station 404, wherein the capability message 420 may indicate a maximum MCS (e.g., MCS threshold 414) that the UE 402 can support. In some examples, the capability message 420 may also indicate overhead parameters that may be associated with the indicated MCS (e.g., MCS threshold 414). For example, the UE 402 may recommend overhead parameter values to the base station 404, where the overhead parameters may be used by the base station 404 to determine a size of a Transport Block (TB) for communication and/or for scheduling communication. In some examples, the overhead parameter may be selected from one of the sets {0,6, 12, 18 }. In other examples, the UE 402 may determine the overhead parameter based on PT-RS density, which may be determined based on PT-RS received from the base station 404. For example, the PT-RS density or a subset/range of PT-RS densities may be assigned or associated with overhead parameters. Alternatively or additionally, the overhead parameter may also be a function of the determined/used MCS (e.g., MCS threshold 414) and/or Physical Resource Block (PRB) allocation associated with the communication.

In other words, the UE may send out a capability message to the base station that may indicate the maximum MCS that the UE can support, as well as a recommendation of overhead parameters that may be used for TB calculation. The base station may then schedule the UE based on the recommendation. In some examples, the ability of the UE to limit/reduce the MCS may be a function of the SCS, such that the MCS used by the UE may depend on the SCS. In some examples, the recommendation of the overhead parameter may be tied to the PT-RS density, i.e., a different value is assigned to each PT-RS density. In other examples, the recommendation of the overhead parameters may be a function of the MCS and/or PRB allocation used. The disclosed MCS threshold (e.g., 414) may be different from the MCS upper limit/limit of UEs with reduced/lower capabilities (e.g., reduced capability (RedCap) UEs) because the MCS threshold may depend on the SCS.

At 422, after the UE 402 determines the SCS 408 and/or MCS threshold 414, the UE 402 may communicate with the base station 404 based at least on the MCS being less than or equal to the determined MCS threshold 414. For example, if the UE 402 indicates to the base station 404 (e.g., via the capability message 420) that it is capable of supporting modulation schemes up to 16QAM, the UE 402 may communicate with the base station 404 based on an MCS equal to or less than 16QAM (e.g., 16QAM, QPSK, etc.).

The UE may use HARQ feedback (e.g., acknowledgement (ACK) or Negative ACK (NACK) (ACK/NACK)) to indicate the decoding result of the received PDSCH to the base station. Fig. 5 is a communication flow 500 illustrating an example of a HARQ feedback process. At 506, the base station 504 may send a DL grant 508 to the UE 502 (e.g., in DCI of the PDCCH), where the DL grant 508 may schedule resources for the UE 502 to receive the PDSCH 512. The DL grant 508 may request the UE 502 to provide HARQ feedback for the PDSCH 512, and the DL grant 508 may also include an offset K1 514 (e.g., a feedback gap indicator), which offset K1 514 may correspond to a time gap between a time at which the UE 502 receives the PDSCH 512 and a time at which the UE 502 is expected to transmit corresponding HARQ feedback for the PDSCH 512, e.g., via a PUCCH message. At 510, the UE 502 may receive a scheduled PDSCH 512 from the base station 504. Based on the decoding result of PDSCH 512, at 516, UE 502 may send HARQ feedback 518 to base station 504 indicating whether PDSCH 512 has been successfully decoded, where HARQ feedback 518 may be sent in PUCCH. For example, if the UE 502 successfully decodes the PDSCH 512, the UE 502 may send positive HARQ feedback (e.g., an ACK) to the base station 504 at 510. On the other hand, if the UE 502 cannot decode the PDSCH 512, e.g., does not receive the PDSCH or fails decoding, the UE 502 may send negative HARQ feedback (e.g., NACK) to the base station 504 at 510.

In another aspect of the disclosure, a K1 offset (e.g., a new K1 offset or a modified K1 offset) may be defined for an MCS (e.g., a higher MCS) that is involved in ICI compensation, while an MCS that is not involved in ICI compensation may use another K1 offset (e.g., an original K1 offset or an unmodified K1 offset). In this way, the K1 offset value may be configured to be SCS dependent, which may reduce the burden of processing complexity associated with ICI compensation for the UE.

Fig. 6 is a communication flow 600 illustrating an example of limiting K1 offset of communication between a UE and a base station based on SCS or MCS associated with SCS, in accordance with aspects of the present disclosure. As shown in communication flow 600, at 606, the UE 602 may determine an SCS 608 to be used for communication with the base station 604. The length of the OFDM symbol may be inversely proportional to the size of the SCS (e.g., OFDM symbol length=1/SCS), so that the size of the OFDM symbol may decrease as the SCS increases. For example, as shown in table 610, table 610 shows an example of OFDM symbol lengths (e.g., tsymb) of different SCS.

At 612, the UE 602 may determine to limit the K1 offset between receiving DL data and sending ACK/NACK feedback to be greater than or equal to a K1 offset threshold 614, wherein the K1 offset threshold 614 may be determined based at least in part on the determined SCS 608. For example, a K1 offset table 616 may be defined for the UE 602 (or modified from an existing table) that may indicate or specify a K1 offset threshold 614 that the UE 602 may use for different SCSs and/or MCSs. The value of the K1 offset threshold 614 may be determined based at least in part on whether ICI compensation for the corresponding SCS and/or MCS is involved. For example, if the UE 602 selects 120KHz for SCS 608 that uses a 64QAM MCS and involves ICI compensation, the K1 offset table 616 may indicate that the minimum value of the K1 offset threshold 614 is eight (8) slots. On the other hand, if the SCS 608 selected by the UE 602 does not involve ICI compensation, the UE 602 may apply another K1 offset threshold 614. For example, if the UE 602 selects 960KHz for SCS 608 that uses 256QAM MCS and does not involve ICI compensation, the K1 offset table 616 may indicate that the minimum value of the K1 offset threshold 614 is four (4) slots.

In one example, the UE 602 may determine whether to limit the KI offset to be greater than or equal to the K1 offset threshold 614 based at least in part on whether ICI and/or a level of ICI is detected. For example, UE 602 may measure ICI for communications between UE 602 and base station 604. Then, if the UE 602 determines that ICI is greater than the ICI threshold, the UE 602 may determine to limit the K1 offset to be greater than the K1 offset threshold 614.

At 618, the UE 602 may send a capability message 620 to the base station 604, wherein the capability message 620 may indicate a minimum K1 offset (e.g., K1 offset threshold 614) that the UE 602 is capable of supporting. In some examples, the capability message 620 may also indicate overhead parameters associated with the MCS. For example, the UE 602 may recommend overhead parameter values to the base station 604, where the overhead parameters may be used by the base station 604 to determine a size of a Transport Block (TB) for communication and/or for scheduling communication. In some examples, the overhead parameter may be selected from one of the sets {0,6, 12, 18 }. In other examples, the UE 602 may determine the overhead parameter based on PT-RS density, which may be determined based on PT-RS received from the base station 604. For example, the PT-RS density or a subset/range of PT-RS densities may be assigned or associated with overhead parameters.

In other words, a new timeline/offset K1' for an MCS that involves ICI compensation may be defined for a UE that is more relaxed (e.g., longer) than SCS and/or MCS that does not involve ICI compensation, e.g., a high MCS (e.g., 64 or 256 QAM) used with a low SCS (e.g., 120 KHz), where an MCS that does not involve ICI compensation may use a different offset K1 (e.g., a shorter offset K1 or an original offset K1). Thus, the offset K1 may be SCS dependent, which may reduce the burden of processing complexity for the UE.

At 622, after the UE 602 determines the SCS 608 and/or the K1 offset threshold 614, the UE 602 may communicate with the base station 604 based at least on the K1 offset being greater than or equal to the determined K1 offset threshold 614. For example, if the UE 602 indicates (e.g., via the capability message 620) to the base station 604 that it can support a minimum K1 offset threshold of eight (8) slots, the base station 604 can schedule an offset K1 (e.g., 514) for the UE 602 that is equal to or greater than eight slots (e.g., k1≡8 slots).

Fig. 7 is a flow chart 700 of a method of wireless communication. The method may be performed by a UE or a component of a UE (e.g., UE 104, 350, 402, 502, 602; apparatus 702; a processing system that may include memory 360 and may be the entire UE 350 or a component of UE 350 such as TX processor 368, RX processor 356, and/or controller/processor 359). The method may enable the UE to limit MCS and/or K1 offset for communicating with the base station to a threshold based at least in part on the SCS for communicating.

At 702, the UE may determine a subcarrier spacing for communicating with a base station, e.g., as described in connection with fig. 4 and 6. For example, at 406, the UE 402 may determine an SCS 408 for communicating with the base station 404. The determination of the subcarrier spacing may be performed, for example, by SCS determination component 840 of apparatus 802 in fig. 8.

At 704, based on the determined subcarrier spacing, the UE may determine to limit at least one of MCS or K1 offset: limiting the MCS to be less than or equal to the MCS threshold or limiting the K1 offset to be greater than or equal to the K1 offset threshold, where the K1 offset may be the number of slots between receiving DL data and sending acknowledgement ACK/NACK feedback, as described in connection with fig. 4 and 6. For example, at 412, the UE 402 may determine to limit the MCS to less than or equal to the MCS threshold 414 based on the determined SCS 408, or at 612, the UE may determine to limit the K1 offset between receiving DL data and sending ACK/NACK feedback to greater than or equal to the K1 offset threshold 614 based on the determined SCS 608. The determination to limit the MCS and/or K1 offset may be performed, for example, by MCS/K1 threshold component 842 of apparatus 802 in fig. 8.

At 706, if the UE determines to limit the MCS to less than or equal to the MCS threshold, the UE may send a capability message to the base station indicating a maximum MCS that the UE can support, where the maximum MCS may be the MCS threshold, e.g., as described in connection with fig. 4. For example, at 418, the UE 402 may send a capability message 420 indicating a maximum MCS that the UE 402 can support. The transmission of the capability message may be performed, for example, by the capability message component 844 and/or the transmission component 834 of the apparatus 802 in fig. 8.

In one example, the capability message may also indicate overhead parameters associated with the MCS. In such an example, the UE may determine the overhead parameter based on PT-RS density received from the base station.

In one example, after transmitting the capability message, the UE may receive a communication from the base station, wherein the scheduling may be based on the transmitted capability message.

In another example, the UE may determine that ICI is greater than a threshold when communicating with the base station such that the determination to limit the MCS to less than or equal to the MCS threshold may also be based on ICI being greater than the threshold.

At 708, if the UE determines to limit the K1 offset to be greater than or equal to the K1 offset threshold, the UE may send a capability message to the base station indicating a minimum K1 offset that the UE can support, where the minimum K1 offset may be the K1 offset threshold, e.g., as described in connection with fig. 6. For example, at 618, the UE 602 may send a capability message 620 indicating the minimum K1 offset that the UE can support. The transmission of the capability message may be performed, for example, by the capability message component 844 and/or the transmission component 834 of the apparatus 802 in fig. 8.

In one example, the UE may determine that ICI is greater than a threshold when communicating with the base station such that the determination to limit the K1 offset to be greater than or equal to the K1 offset threshold may also be based on ICI being greater than the threshold.

At 710, based on at least one of two conditions: the MCS is less than or equal to the determined MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, and the UE may communicate with the base station as described in connection with fig. 4 and 6. For example, at 422, UE 402 may communicate with base station 404 based on the MCS being less than or equal to the determined MCS threshold 414, or at 622, UE 602 may communicate with base station 604 based on the K1 offset being greater than or equal to the determined K1 offset threshold 614. The communication may be performed, for example, by the communication component 846, the receiving component 830, and/or the transmitting component 834 of the apparatus 802 in fig. 8.

Fig. 8 is a diagram 800 illustrating an example of a hardware implementation for an apparatus 802. The apparatus 802 is a UE and includes a cellular baseband processor 804 (also referred to as a modem) coupled to a cellular RF transceiver 822 and one or more Subscriber Identity Module (SIM) cards 820, an application processor 806 coupled to a Secure Digital (SD) card 808 and a screen 810, a bluetooth module 812, a Wireless Local Area Network (WLAN) module 814, a Global Positioning System (GPS) module 816, and a power supply 818. The cellular baseband processor 804 communicates with the UE 104 and/or BS 102/180 through a cellular RF transceiver 822. The cellular baseband processor 804 may include a computer readable medium/memory. The computer readable medium/memory may be non-transitory. The cellular baseband processor 804 is responsible for general processing, including the execution of software stored on a computer-readable medium/memory. The software, when executed by the cellular baseband processor 804, causes the cellular baseband processor 804 to perform the various functions described supra. The computer readable medium/memory can also be used for storing data that is manipulated by the cellular baseband processor 804 when executing software. The cellular baseband processor 804 also includes a receive component 830, a communication manager 832, and a transmit component 834. The communications manager 832 includes one or more of the illustrated components. The components within the communication manager 832 may be stored in a computer-readable medium/memory and/or configured as hardware within the cellular baseband processor 804. The cellular baseband processor 804 may be a component of the UE 350 and may include the memory 360 and/or at least one of the TX processor 368, the RX processor 356, and the controller/processor 359. In one configuration, the apparatus 802 may be a modem chip and include only a baseband processor 804, and in another configuration, the apparatus 802 may be an entire UE (see, e.g., 350 of fig. 3) and include additional modules of the apparatus 802.

The communication manager 832 includes an SCS determination component 840 configured to determine subcarrier spacing for communicating with a base station, e.g., as described in connection with 702 of fig. 7. Communication manager 832 also includes MCS/K1 threshold component 842 configured to determine to limit at least one of MCS or K1 offset based on the determined subcarrier spacing: limiting the MCS to less than or equal to the MCS threshold or limiting the K1 offset to greater than or equal to the K1 offset threshold, wherein the K1 offset is the number of slots between receiving DL data and sending acknowledgement ACK/NACK feedback, e.g., as described in connection with 704 of fig. 7. The communication manager 832 also includes a capability message component 844 configured to send a capability message to the base station indicating a maximum MCS that the UE can support, the maximum MCS being an MCS threshold and/or indicating a minimum K1 offset that the UE can support, the minimum K1 offset being a K1 offset threshold, e.g., as described in connection with 706 and/or 708 of fig. 7. The communication manager 832 also includes a communication component 846 configured to be based on at least one of: the MCS is less than or equal to the determined MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, for communication with the base station, e.g., as described in connection with 710 of fig. 7.

The apparatus may include additional components to perform each of the blocks of the algorithm in the flowchart of fig. 7. As such, each block in the flow chart of FIG. 7 may be performed by components, and the apparatus may include one or more of those components. A component may be one or more hardware components specifically configured to perform the described process/algorithm, implemented by a processor configured to perform the described process/algorithm, stored in a computer readable medium for implementation by a processor, or some combination thereof.

In one configuration, apparatus 802, and in particular cellular baseband processor 804, includes means for determining subcarrier spacing for communicating with a base station (e.g., SCS determination component 840). The apparatus 802 includes means for determining to limit at least one of MCS or K1 offset based on the determined subcarrier spacing (e.g., MCS/K1 component 842): the MCS is limited to be less than or equal to an MCS threshold or the K1 offset is limited to be greater than or equal to a K1 offset threshold, where the K1 offset is the number of slots between receiving DL data and sending acknowledgement, ACK/NACK, feedback. The apparatus 802 includes means for based on at least one of: components (e.g., communication component 846, receiving component 830, and/or transmitting component 834) that communicate with the base station with an MCS less than or equal to the determined MCS threshold or a K1 offset greater than or equal to a K1 offset threshold.

In one configuration, if the apparatus 802 determines to limit the MCS to less than or equal to the MCS threshold, the apparatus 802 may include means for sending a capability message to the base station indicating a maximum MCS that the apparatus 802 is capable of supporting, where the maximum MCS may be the MCS threshold (e.g., the capability message component 844 and/or the transmission component 834). In such a configuration, the capability message may also indicate overhead parameters associated with the MCS. In such a configuration, the apparatus 802 may determine the overhead parameter based on PT-RS density received from the base station.

In one configuration, after transmitting the capability message, the apparatus 802 may receive a communication from the base station, wherein the scheduling may be based on the transmitted capability message.

In one configuration, the apparatus 802 may include means for determining that ICI is greater than a threshold when communicating with a base station, such that the means for determining to limit the MCS to less than or equal to the MCS threshold may also be based on ICI being greater than the threshold.

In one configuration, if the apparatus 802 determines to limit the K1 offset to be greater than or equal to a K1 offset threshold, the apparatus 802 may include means for sending a capability message to the base station indicating a minimum K1 offset that the apparatus 802 is capable of supporting, wherein the minimum K1 offset may be the K1 offset threshold (e.g., the capability message component 844 and/or the transmission component 834). In such a configuration, the apparatus 802 may include means for determining that ICI is greater than a threshold when communicating with a base station, such that the determination to limit K1 offset to greater than or equal to the K1 offset threshold may also be based on ICI being greater than the threshold.

The component may be one or more of the components of the apparatus 802 configured to perform the functions described by the component. As described above, the apparatus 802 may include a TX processor 368, an RX processor 356, and a controller/processor 359. As such, in one configuration, the component may be TX processor 368, RX processor 356, and controller/processor 359 configured to perform the functions recited by the component.

Fig. 9 is a flow chart 900 of a method of wireless communication. The method may be performed by a base station or a component of a base station (e.g., base stations 102, 180, 310, 404, 504, 604; apparatus 1002; a processing system that may include memory 376 and may be the entire base station 310 or a component of a base station 310 such as TX processor 316RX, RX processor 370, and/or controller/processor 375). The method may enable a base station to communicate with a UE (e.g., UE 104) based on an MCS and/or K1 offset indicated or supported by the UE.

At 902, the base station may receive a capability message from the UE indicating a maximum MCS or a minimum K1 offset that the UE can support, which may be based on the subcarrier spacing, as described in connection with fig. 4 and 6. For example, at 418, the base station 404 may receive a capability message 420 from the UE 402 indicating the maximum MCS that the UE 402 can support, or at 618, the base station 604 may receive a capability message 620 from the UE 602 indicating the minimum K1 offset that the UE can support. The receipt of the capability message may be performed, for example, by the capability message processing component 1040 and/or the receiving component 1030 of the apparatus 1002 in fig. 10.

At 904, the base station may transmit a PT-RS to the UE. In one example, the capability message may also indicate an overhead parameter associated with the maximum MCS, where the overhead parameter may be based on PT-RS density of PT-RS, as described in connection with fig. 4. The transmission of the PT-RS may be performed, for example, by the PT-RS component 1042 and/or the transmission component 1034 of the apparatus 1002 in fig. 10.

At 906, the base station may determine a size of a TB for communicating with the UE based on the overhead parameter, wherein the communicating with the UE may be based on the determined size for the TB, e.g., as described in connection with fig. 4. The determination of the TB size may be performed, for example, by the TB size determination component 1044 of the apparatus 1002 in fig. 10.

At 908, the base station may send a schedule for communications to the UE, which may be based on the received capability message, e.g., as described in connection with fig. 4 and 6. The scheduled transmission may be performed, for example, by the transmission component 1034 of the device 1002 in fig. 10.

At 910, based on at least one of two conditions: the MCS is less than or equal to the maximum MCS or the K1 offset is greater than or equal to the minimum K1 offset and the base station may communicate with the UE as described in connection with fig. 4 and 6. For example, at 422, base station 404 may communicate with UE 402 based on the MCS being less than or equal to a maximum MCS (e.g., MCS threshold 414), or at 622, base station 604 may communicate with UE 602 based on the K1 offset being greater than or equal to a minimum K1 offset (e.g., K1 offset threshold 614). The communication may be performed, for example, by communication component 1046, reception component 1030, and/or transmission component 1034 of apparatus 1002 in fig. 10.

Fig. 10 is a diagram 1000 illustrating an example of a hardware implementation for an apparatus 1002. The apparatus 1002 is a BS and includes a baseband unit 1004. The baseband unit 1004 may communicate with the UE 104 through a cellular RF transceiver. The baseband unit 1004 may include a computer readable medium/memory. The baseband unit 1004 is responsible for general processing, including the execution of software stored on a computer-readable medium/memory. The software, when executed by the baseband unit 1004, causes the baseband unit 1004 to perform the various functions described supra. The computer readable medium/memory can also be used for storing data that is manipulated by the baseband unit 1004 when executing software. The baseband unit 1004 also includes a receiving component 1030, a communication manager 1032, and a transmitting component 1034. The communications manager 1032 includes one or more of the illustrated components. Components within communications manager 1032 may be stored in a computer-readable medium/memory and/or configured as hardware within baseband unit 1004. Baseband unit 1004 may be a component of BS 310 and may include memory 376 and/or at least one of TX processor 316, RX processor 370, and controller/processor 375.

The communication manager 1032 includes a capability processing component 1040 configured to receive a capability message from the UE indicating a maximum MCS or a minimum K1 offset that the UE can support, the maximum MCS or the minimum K1 offset being based on subcarrier spacing, e.g., as described in connection with 902 of fig. 9. The communications manager 1032 further includes a PT-RS component 1042 configured to transmit PT-RS to the UE, the overhead parameter being based on PT-RS density of PT-RS, e.g., as described in connection with 904 of fig. 9. The communication manager 1032 further includes a TB size determination component 1044 configured to determine a size of a TB for communication with a UE based on overhead parameters, wherein communication with the UE is based on the determined size for the TB, e.g., as described in connection with 906 of fig. 9. The communications manager 1032 further includes a communications component 1046 configured to be based on at least one of: the MCS is less than or equal to the maximum MCS or the K1 offset is greater than or equal to the minimum K1 offset, for communication with the UE, e.g., as described in connection with 910 of fig. 9.

The apparatus may include additional components to perform each of the blocks of the algorithm in the flowchart of fig. 9. As such, each block in the flow chart of FIG. 9 may be performed by components, and the apparatus may include one or more of those components. A component may be one or more hardware components specifically configured to perform the described process/algorithm, implemented by a processor configured to perform the described process/algorithm, stored in a computer readable medium for implementation by a processor, or some combination thereof.

In one configuration, the apparatus 1002, and in particular the baseband unit 1004, comprises means for receiving a capability message from the UE indicating a maximum MCS or minimum K1 offset that the UE is capable of supporting, the maximum MCS or minimum K1 offset being based on a subcarrier spacing (e.g., the capability handling component 1040 and/or the receiving component 1030). The apparatus 1002 includes means for based on at least one of: MCS is less than or equal to the maximum MCS or K1 offset is greater than or equal to the minimum K1 offset, components (e.g., communication component 1046, reception component 1030, and/or transmission component 1034) that communicate with the UE.

In one configuration, the capability message also indicates overhead parameters associated with the maximum MCS. In such a configuration, the apparatus 1002 includes means for determining a size of a TB for communicating with a UE based on overhead parameters, wherein communication with the UE is based on the determined size of the TB (e.g., TB size determining component 1044 and/or communication component 1046). In such a configuration, the apparatus 1002 includes means for transmitting a PT-RS to a UE, the overhead parameter being based on a PT-RS density of the PT-RS (e.g., transmission component 1034).

In another configuration, the apparatus 1002 includes means (e.g., a transmission component 1034) for transmitting a schedule for communication to a UE, the schedule based on the received capability message.

The component may be one or more of the components of the apparatus 1002 configured to perform the functions described by the component. As described above, the apparatus 1002 may include a TX processor 316, an RX processor 370, and a controller/processor 375. As such, in one configuration, the components may be TX processor 316, RX processor 370, and controller/processor 375 configured to perform the functions recited by the components.

Fig. 11 is a flow chart 1100 of a method of wireless communication. The method may be performed by a UE or a component of a UE (e.g., UE 104, 350, 402, 502, 602; apparatus 1202; a processing system that may include memory 360 and may be the entire UE 350 or a component of UE 350 such as TX processor 368, RX processor 356, and/or controller/processor 359). The method may enable the UE to limit MCS and/or K1 offset for communicating with the base station to a threshold based at least in part on the SCS for communicating.

At 1102, the UE may limit at least one of MCS or K1 offset based on a subcarrier spacing selected for communicating with the base station: limiting the MCS to be less than or equal to the MCS threshold or limiting the K1 offset to be greater than or equal to the K1 offset threshold, where the K1 offset may be the number of slots between receiving DL data and transmitting ACK/NACK feedback, as described in connection with fig. 4 and 6. For example, at 412, the UE 402 may limit the MCS to be less than or equal to the MCS threshold 414 based on the SCS 408, or at 612, the UE may determine to limit the K1 offset between receiving DL data and sending ACK/NACK feedback to be greater than or equal to the K1 offset threshold 614 based on the SCS 608. The limiting of MCS and/or K1 offset may be performed, for example, by MCS/K1 limiting component 1240 of apparatus 1202 in fig. 12.

In one example, if the UE limits the MCS to less than or equal to the MCS threshold, the UE may send a capability message to the base station indicating a maximum MCS that the UE can support, where the maximum MCS may be the MCS threshold, e.g., as described in connection with fig. 4. For example, at 418, the UE 402 may send a capability message 420 indicating a maximum MCS that the UE 402 can support.

In another example, the capability message may also indicate overhead parameters associated with the MCS. In such an example, the UE may determine the overhead parameter based on PT-RS density received from the base station.

In another example, after transmitting the capability message, the UE may receive a communication from the base station, wherein the scheduling may be based on the transmitted capability message.

In another example, the UE may measure ICI while communicating with the base station such that the limit of the MCS being less than or equal to the MCS threshold may also be based on the ICI being greater than the ICI threshold.

In another example, if the UE limits the K1 offset to be greater than or equal to the K1 offset threshold, the UE may send a capability message to the base station indicating the minimum K1 offset that the UE can support, where the minimum K1 offset may be the K1 offset threshold, e.g., as described in connection with fig. 6. For example, at 618, the UE 602 may send a capability message 620 indicating the minimum K1 offset that the UE can support.

In another example, the UE may measure ICI while communicating with the base station such that the restriction that the K1 offset is greater than or equal to the K1 offset threshold may also be based on the ICI being greater than the threshold.

At 1104, the UE may be based on at least one of two cases: the MCS is less than or equal to the MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, as described in connection with fig. 4 and 6. For example, at 422, UE 402 may communicate with base station 404 based on MCS being less than or equal to MCS threshold 414, or at 622, UE 602 may communicate with base station 604 based on K1 offset being greater than or equal to K1 offset threshold 614. The communication may be performed, for example, by communication component 1242, reception component 1230, and/or transmission component 1234 of apparatus 1202 in fig. 12.

Fig. 12 is a diagram 1200 illustrating an example of a hardware implementation for the apparatus 1202. The apparatus 1202 is a UE and includes a cellular baseband processor 1204 (also referred to as a modem) coupled to a cellular RF transceiver 1222 and one or more Subscriber Identity Module (SIM) cards 1220, an application processor 1206 coupled to a Secure Digital (SD) card 1208 and a screen 1210, a bluetooth module 1212, a Wireless Local Area Network (WLAN) module 1214, a Global Positioning System (GPS) module 1216, and a power supply 1218. The cellular baseband processor 1204 communicates with the UE 104 and/or BS 102/180 via a cellular RF transceiver 1222. The cellular baseband processor 1204 may include a computer readable medium/memory. The computer readable medium/memory may be non-transitory. The cellular baseband processor 1204 is responsible for general processing, including the execution of software stored on a computer-readable medium/memory. The software, when executed by the cellular baseband processor 1204, causes the cellular baseband processor 1204 to perform the various functions described supra. The computer readable medium/memory can also be used for storing data that is manipulated by the cellular baseband processor 1204 when executing software. The cellular baseband processor 1204 also includes a receive component 1230, a communication manager 1232, and a transmit component 1234. The communications manager 1232 includes one or more of the illustrated components. The components within the communications manager 1232 may be stored in a computer readable medium/memory and/or configured as hardware within the cellular baseband processor 1204. The cellular baseband processor 1204 may be a component of the UE 350 and may include the memory 360 and/or at least one of the TX processor 368, the RX processor 356, and the controller/processor 359. In one configuration, the apparatus 1202 may be a modem chip and include only a baseband processor 1204, and in another configuration, the apparatus 1202 may be an entire UE (see, e.g., 350 of fig. 3) and include additional modules of the apparatus 1202.

The communication manager 1232 further includes an MCS/K1 threshold limiting component 1240 configured to limit at least one of the MCS or K1 offset based on a subcarrier spacing selected for communication with the base station: limiting the MCS to be less than or equal to the MCS threshold or limiting the K1 offset to be greater than or equal to the K1 offset threshold, where the K1 offset is the number of slots between receiving DL data and sending ACK/NACK feedback, e.g., as described in connection with 1102 of fig. 11. The communication manager 1232 also includes a communication configuration component 1242 that is configured to be based on at least one of: the MCS is less than or equal to the determined MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, for communication with the base station, e.g., as described in connection with 1104 of fig. 11.

The apparatus may include additional components to perform each of the blocks of the algorithm in the flowchart of fig. 11. As such, each block in the flow chart of FIG. 11 may be performed by components, and the apparatus may include one or more of those components. A component may be one or more hardware components specifically configured to perform the described process/algorithm, implemented by a processor configured to perform the described process/algorithm, stored in a computer readable medium for implementation by a processor, or some combination thereof.

In one configuration, the apparatus 1202, in particular the cellular baseband processor 1204, comprises means for limiting at least one of MCS or K1 offset based on a subcarrier spacing selected for communication with a base station: limiting the MCS to be less than or equal to an MCS threshold or limiting the K1 offset to be greater than or equal to a K1 offset threshold, wherein the K1 offset is the number of slots between receiving DL data and transmitting ACK/NACK feedback (e.g., MCS/K1 limiting component 1240). The apparatus 1202 includes means for based on at least one of: components (e.g., communication configuration component 1242, receiving component 1230, and/or transmitting component 1234) that communicate with the base station with an MCS less than or equal to an MCS threshold or a K1 offset greater than or equal to a K1 offset threshold.

In one configuration, if the apparatus 1202 includes means for limiting the MCS to less than or equal to an MCS threshold, the apparatus 1202 may include means for sending a capability message to the base station indicating a maximum MCS that the apparatus 1202 is capable of supporting, where the maximum MCS may be the MCS threshold (e.g., the capability message component 1244 and/or the transmission component 1234). In such a configuration, the capability message may also indicate overhead parameters associated with the MCS. In such a configuration, the apparatus 1202 may determine the overhead parameter based on PT-RS density received from the base station.

In one configuration, after transmitting the capability message, the apparatus 1202 may receive a communication from the base station, wherein the scheduling may be based on the transmitted capability message.

In one configuration, the apparatus 1202 may include means for measuring ICI when communicating with a base station such that the means for determining to limit the MCS to less than or equal to an MCS threshold may also be based on ICI being greater than the threshold.

In one configuration, if the apparatus 1202 includes means for limiting the K1 offset to be greater than or equal to a K1 offset threshold, the apparatus 1202 may include means for sending a capability message to the base station indicating a minimum K1 offset that the apparatus 1202 is capable of supporting, where the minimum K1 offset may be the K1 offset threshold (e.g., the capability message component 1244 and/or the transmission component 1234). In such a configuration, the apparatus 1202 may include means for determining that ICI is greater than a threshold when communicating with a base station, such that the determination to limit K1 offset to greater than or equal to the K1 offset threshold may also be based on ICI being greater than the threshold.

The component may be one or more of the components of the apparatus 1202 configured to perform the functions described by the component. As described above, the apparatus 1202 may include a TX processor 368, an RX processor 356, and a controller/processor 359. As such, in one configuration, the component may be TX processor 368, RX processor 356, and controller/processor 359 configured to perform the functions recited by the component.

The following examples set forth additional aspects and are merely illustrative, and aspects thereof may be combined with aspects or teachings of other embodiments described herein without limitation.

Aspect 1 is a method of wireless communication at a UE, the method comprising: determining a subcarrier spacing for communicating with the base station; determining to limit at least one of the MCS or K1 offset based on the determined subcarrier spacing: limiting the MCS to less than or equal to an MCS threshold or limiting the K1 offset to greater than or equal to a K1 offset threshold, wherein the K1 offset is the number of slots between receiving DL data and sending acknowledgement, ACK/NACK, feedback; and based on at least one of the following two conditions: the MCS is less than or equal to the determined MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, and communicates with the base station.

In aspect 2, the method according to aspect 1 further comprises: determining to limit at least one of the MCS or K1 offset: limiting the MCS to be less than or equal to the MCS threshold or limiting the K1 offset to be greater than or equal to the K1 offset threshold includes determining to limit the MCS to be less than or equal to the MCS threshold.

In aspect 3, the method according to aspect 1 or aspect 2 further comprises: when communicating with the base station, determining that ICI is greater than a threshold, wherein the determination to limit the MCS to less than or equal to the MCS threshold is further based on the ICI being greater than the threshold.

In aspect 4, the method according to any one of aspects 1 to 3 further comprises: a capability message indicating a maximum MCS that the UE can support is transmitted to the base station, the maximum MCS being an MCS threshold.

In aspect 5, the method according to any of aspects 1-4 further comprising the capability message further indicating overhead parameters associated with the MCS.

In aspect 6, the method according to any one of aspects 1-5 further comprising determining an overhead parameter based on PT-RS density received from the base station.

In aspect 7, the method according to any of aspects 1-6 further comprising receiving a communication from a base station, the scheduling being based on the sent capability message.

In aspect 8, the method according to any one of aspects 1 to 7 further comprises: determining to limit at least one of the MCS or K1 offset: limiting the MCS to be less than or equal to the MCS threshold or limiting the K1 offset to be greater than or equal to the K1 offset threshold includes determining to limit the K1 offset to be greater than or equal to the K1 offset threshold.

In aspect 9, the method according to any one of aspects 1 to 8 further comprises: when communicating with a base station, determining that ICI is greater than a threshold, wherein the determination to limit K1 offset to be greater than or equal to the K1 offset threshold is further based on ICI being greater than the threshold.

In aspect 10, the method according to any one of aspects 1 to 9 further comprises: a capability message indicating a minimum K1 offset that the UE can support is sent to the base station, the minimum K1 offset being a K1 offset threshold.

Aspect 11 is an apparatus for wireless communication, comprising at least one processor coupled to a memory and configured to implement the method of any of aspects 1-10.

Aspect 12 is an apparatus for wireless communication, comprising means for implementing the method of any of aspects 1-10.

Aspect 13 is a non-transitory computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement the method of any one of aspects 1 to 10.

Aspect 14 is a method of wireless communication at a base station, comprising: receiving a capability message from the UE indicating a maximum MCS or a minimum K1 offset that the UE can support, the maximum MCS or the minimum K1 offset being based on the subcarrier spacing; and based on at least one of the following two conditions: the MCS is less than or equal to the maximum MCS or the K1 offset is greater than or equal to the minimum K1 offset, and communicates with the UE.

In aspect 15, the method of aspect 14 further comprising the capability message further indicating an overhead parameter associated with the maximum MCS.

In aspect 16, the method according to aspect 14 or aspect 15 further comprising determining a size of a TB for communicating with the UE based on the overhead parameter, wherein the communicating with the UE is based on the determined size for the TB.

In aspect 17, the method according to any one of aspects 14-16 further comprising transmitting PT-RS to the UE, the overhead parameter being based on PT-RS density of PT-RS.

In aspect 18, the method according to any of aspects 14-17 further comprising sending a schedule for communication to the UE, the schedule being based on the received capability message.

Aspect 19 is an apparatus for wireless communication, comprising at least one processor coupled to a memory and configured to implement the method of any of aspects 14-18.

Aspect 20 is an apparatus for wireless communication comprising means for implementing the method of any of aspects 14 to 18.

Aspect 21 is a non-transitory computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement the method of any one of aspects 14 to 18.

Aspect 22 is an apparatus for wireless communication, the apparatus comprising at least one processor coupled to a memory and configured to: at least one of MCS or K1 offset is limited based on a subcarrier spacing selected for communication with the base station: limiting the MCS to be less than or equal to an MCS threshold or limiting the K1 offset to be greater than or equal to a K1 offset threshold, the K1 offset being the number of slots between receiving DL data and transmitting ACK/NACK feedback; and based on at least one of the following two conditions: the MCS is less than or equal to the MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, and communicates with the base station.

Aspect 23 is the apparatus of aspect 22, wherein to limit at least one of MCS or K1 offset: limiting the MCS to less than or equal to an MCS threshold or limiting the K1 offset to greater than or equal to a K1 offset threshold, the at least one processor and the memory are further configured to: the MCS is limited to be less than or equal to the MCS threshold.

Aspect 24 is the apparatus of any one of aspects 22 and 23, wherein the at least one processor and the memory are further configured to: ICI is measured when communicating with the base station, wherein limiting the MCS to less than or equal to the MCS threshold is further based on ICI being greater than the ICI threshold.

Aspect 25 is the apparatus of any one of aspects 22-24, wherein the at least one processor and the memory are further configured to: a capability message indicating a maximum MCS that the UE can support is transmitted to the base station, the maximum MCS being an MCS threshold.

Aspect 26 is the apparatus of any one of aspects 22-25, wherein the capability message further indicates an overhead parameter associated with the MCS.

Aspect 27 is the apparatus of any one of aspects 22-26, wherein the at least one processor and the memory are further configured to: the overhead parameter is selected based on the PT-RS density received from the base station.

Aspect 28 is the apparatus of any one of aspects 22-27, wherein the at least one processor and the memory are further configured to: a schedule for communication is received from the base station, the schedule being based on the sent capability message.

Aspect 29 is the apparatus of aspects 22-28, wherein to limit at least one of MCS or K1 offset: limiting the MCS to less than or equal to an MCS threshold or limiting the K1 offset to greater than or equal to a K1 offset threshold, the at least one processor and the memory are further configured to: the K1 offset is limited to be greater than or equal to the K1 offset threshold.

Aspect 30 is the apparatus of any one of aspects 22-29, wherein the at least one processor and the memory are further configured to: ICI is measured when communicating with the base station, wherein limiting the K1 offset to be greater than or equal to the K1 offset threshold is further based on ICI being greater than the ICI threshold.

Aspect 31 is the apparatus of any one of aspects 22-30, wherein the at least one processor and the memory are further configured to: a capability message indicating a minimum K1 offset that the UE can support is sent to the base station, the minimum K1 offset being a K1 offset threshold.

Aspect 32 is a method for implementing wireless communication of any of aspects 22 to 31.

Aspect 33 is an apparatus for wireless communication, comprising means for implementing any of aspects 22 to 31.

Aspect 34 is a computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 22 to 31.

Aspect 35 is an apparatus for wireless communication, the apparatus comprising at least one processor coupled to a memory and configured to: receiving a capability message from the UE indicating an MCS or a minimum K1 offset that the UE can support, the maximum MCS or the minimum K1 offset being based on the subcarrier spacing; and based on at least one of the following two conditions: the MCS is less than or equal to the maximum MCS or the K1 offset is greater than or equal to the minimum K1 offset, and communicates with the UE.

Aspect 36 is the apparatus of aspect 35, wherein the capability message further indicates an overhead parameter associated with a maximum MCS.

Aspect 37 is the apparatus of any one of aspects 35 and 36, wherein the at least one processor and the memory are further configured to select a size of a TB for communicating with the UE based on an overhead parameter, wherein the communicating with the UE is based on the size of the TB.

Aspect 38 is the apparatus of any one of aspects 35-37, wherein the at least one processor and the memory are further configured to: the PT-RS is sent to the UE, and the overhead parameter is based on PT-RS density of the PT-RS.

Aspect 39 is the apparatus of any one of aspects 35-38, wherein the at least one processor and the memory are further configured to: a schedule for communication is sent to the UE, the schedule being based on the received capability message.

Aspect 40 is a method for implementing wireless communications of any of aspects 35 to 39.

Aspect 41 is an apparatus for wireless communication, comprising means for implementing any of aspects 35 to 39.

Aspect 42 is a computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 35 to 39.

It should be understood that the specific order or hierarchy of blocks in the processes/flowcharts disclosed is an illustration of example approaches. Based on design preferences, it is understood that the specific order or hierarchy of blocks in the processes/flowcharts may be rearranged. Furthermore, some blocks may be combined or omitted. The claims of the appended method present elements of the various blocks in sample order and are not meant to be limited to the specific order or hierarchy presented.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated, but rather "one or more". Terms such as "if," "when … …," and "at … …" should be read to mean "under the conditions" rather than to imply a direct temporal relationship or reaction. That is, these phrases (e.g., "when … …") do not imply that an action will occur in response to or during the occurrence of an action, but rather merely that a condition is met, and do not require specific or immediate time constraints for the action to occur. The term "exemplary" is used herein to mean "serving as an example, instance, or illustration. Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects. The term "some" means one or more unless expressly specified otherwise. Combinations such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C" and "A, B, C or any combination thereof" include any combination of A, B and/or C, and may include multiples of a, multiples of B, or multiples of C. Specifically, a combination such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C" and "A, B, C or any combination thereof" may be a only, B only, C, A and B, A and C, B and C, or a and B and C, wherein any such combination may comprise one or more members of A, B or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words "module," mechanism, "" element, "" device, "etc. may not be able to replace the word" component. Thus, unless an element is explicitly recited using the phrase "means for … …," any claim element should not be construed as a component plus function.

Claims (30)

1. An apparatus of wireless communication at a User Equipment (UE), comprising:

a memory; and

at least one processor coupled to the memory and configured to:

at least one of a Modulation and Coding Scheme (MCS) or a K1 offset is limited based on a subcarrier spacing selected for communication with the base station: limiting a Modulation and Coding Scheme (MCS) to be less than or equal to an MCS threshold, or limiting a K1 offset to be greater than or equal to a K1 offset threshold, the K1 offset being a number of slots between receiving Downlink (DL) data and transmitting Acknowledgement (ACK)/Negative ACK (NACK) (ACK/NACK) feedback; and

based on at least one of the following two conditions: the MCS is less than or equal to the MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, and the base station is communicated.

2. The apparatus of claim 1, wherein to limit the at least one of the MCS or the K1 offset: limiting the MCS to be less than or equal to the MCS threshold or limiting the K1 offset to be greater than or equal to the K1 offset threshold, the at least one processor and the memory further configured to:

Limiting the MCS to be less than or equal to the MCS threshold.

3. The apparatus of claim 2, wherein the at least one processor and the memory are further configured to:

inter-carrier interference (ICI) is measured when communicating with the base station, wherein limiting the MCS to less than or equal to the MCS threshold is further based on the ICI being greater than an ICI threshold.

4. The apparatus of claim 2, wherein the at least one processor and the memory are further configured to:

and sending a capability message indicating the maximum MCS which can be supported by the UE to the base station, wherein the maximum MCS is the MCS threshold value.

5. The apparatus of claim 4, wherein the capability message further indicates an overhead parameter associated with the MCS.

6. The apparatus of claim 5, wherein the at least one processor and the memory are further configured to:

the overhead parameter is selected based on a phase tracking reference signal (PT-RS) density received from the base station.

7. The apparatus of claim 4, wherein the at least one processor and the memory are further configured to:

a schedule for the communication is received from the base station, the schedule being based on the capability message.

8. The apparatus of claim 1, wherein to limit the at least one of the MCS or the K1 offset: limiting the MCS to be less than or equal to the MCS threshold or limiting the K1 offset to be greater than or equal to the K1 offset threshold, the at least one processor and the memory further configured to:

limiting the K1 offset to be greater than or equal to the K1 offset threshold.

9. The apparatus of claim 8, wherein the at least one processor and the memory are further configured to:

inter-carrier interference (ICI) is measured when communicating with the base station, wherein limiting the K1 offset to be greater than or equal to the K1 offset threshold is further based on the ICI being greater than an ICI threshold.

10. The apparatus of claim 8, wherein the at least one processor and the memory are further configured to:

and sending a capability message indicating the minimum K1 offset which can be supported by the UE to the base station, wherein the minimum K1 offset is the K1 offset threshold value.

11. A method of wireless communication at a User Equipment (UE), comprising:

at least one of a Modulation and Coding Scheme (MCS) or a K1 offset is limited based on a subcarrier spacing selected for communication with the base station: limiting a Modulation and Coding Scheme (MCS) to be less than or equal to an MCS threshold, or limiting a K1 offset to be greater than or equal to a K1 offset threshold, the K1 offset being a number of slots between receiving Downlink (DL) data and transmitting Acknowledgement (ACK)/Negative ACK (NACK) (ACK/NACK) feedback; and

Based on at least one of the following two conditions: the MCS is less than or equal to the MCS threshold or the K1 offset is greater than or equal to the K1 offset threshold, and the base station is communicated.

12. The method of claim 11, wherein at least one of the MCS or the K1 offset is limited: limiting the MCS to be less than or equal to the MCS threshold, or limiting the K1 offset to be greater than or equal to the K1 offset threshold, includes limiting the MCS to be less than or equal to the MCS threshold.

13. The method of claim 12, further comprising: inter-carrier interference (ICI) is measured when communicating with the base station, wherein limiting the MCS to less than or equal to the MCS threshold is further based on the ICI being greater than an ICI threshold.

14. The method of claim 12, further comprising: and sending a capability message indicating the maximum MCS which can be supported by the UE to the base station, wherein the maximum MCS is the MCS threshold value.

15. The method of claim 14, wherein the capability message further indicates overhead parameters associated with the MCS.

16. The method of claim 15, further comprising: the overhead parameter is selected based on a phase tracking reference signal (PT-RS) density received from the base station.

17. The method of claim 14, further comprising: a schedule for the communication is received from the base station, the schedule being based on the capability message.

18. The method of claim 11, wherein at least one of the MCS or the K1 offset is limited: limiting the MCS to be less than or equal to the MCS threshold, or limiting the K1 offset to be greater than or equal to the K1 offset threshold, includes limiting the K1 offset to be greater than or equal to the K1 offset threshold.

19. The method of claim 18, further comprising: inter-carrier interference (ICI) is measured when communicating with the base station, wherein limiting the K1 offset to be greater than or equal to the K1 offset threshold is further based on the ICI being greater than an ICI threshold.

20. The method of claim 18, further comprising: and sending a capability message indicating the minimum K1 offset which can be supported by the UE to the base station, wherein the minimum K1 offset is the K1 offset threshold value.

21. An apparatus of wireless communication at a base station, comprising:

a memory; and

at least one processor coupled to the memory and configured to:

Receiving, from a User Equipment (UE), a capability message indicating a maximum Modulation and Coding Scheme (MCS) or a minimum K1 offset that the UE can support, the maximum MCS or the minimum K1 offset being based on a subcarrier spacing; and

based on at least one of the following two conditions: and the MCS is smaller than or equal to the maximum MCS, or the K1 offset is larger than or equal to the minimum K1 offset, and the communication is carried out with the UE.

22. The apparatus of claim 21, wherein the capability message further indicates an overhead parameter associated with the maximum MCS.

23. The apparatus of claim 22, wherein the at least one processor and the memory are further configured to select a size of a Transport Block (TB) for communicating with the UE based on the overhead parameter, wherein the communicating with the UE is based on the size of the TB.

24. The apparatus of claim 22, wherein the at least one processor and the memory are further configured to: a phase tracking reference signal (PT-RS) is sent to the UE, the overhead parameter being based on a PT-RS density of the PT-RS.

25. The apparatus of claim 22, wherein the at least one processor and the memory are further configured to: a schedule for the communication is sent to the UE, the schedule being based on the received capability message.

26. A method of wireless communication at a base station, comprising:

receiving, from a User Equipment (UE), a capability message indicating a maximum Modulation and Coding Scheme (MCS) or a minimum K1 offset that the UE can support, the maximum MCS or the minimum K1 offset being based on a subcarrier spacing; and

based on at least one of the following two conditions: and the MCS is smaller than or equal to the maximum MCS, or the K1 offset is larger than or equal to the minimum K1 offset, and the communication is carried out with the UE.

27. The method of claim 26, wherein the capability message further indicates an overhead parameter associated with the maximum MCS.

28. The method of claim 27, further comprising selecting a size of a Transport Block (TB) for communicating with the UE based on the overhead parameter, wherein communicating with the UE is based on the size of the TB.

29. The method of claim 27, further comprising transmitting a phase tracking reference signal (PT-RS) to the UE, the overhead parameter being based on a PT-RS density of the PT-RS.

30. The method of claim 27, further comprising: a schedule for the communication is sent to the UE, the schedule being based on the received capability message.