LDPC base graph selection system and method

Abstract

A first device may select a base map from a plurality of base maps based on one or more of (a) a decoding complexity of a second device, (b) a device category of the second device, (c) a capability of the second device, (d) a decoder mode of the second device, (e) a receiver complexity of the second device, (f) a receiver mode of the second device, (g) a power consumption of the second device, (h) a power mode of the second device, or (i) an indication from the second device. The first device may output an LDPC coded transmission to the second device based on the selected base graph.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. non-provisional patent application serial number 17 / 819,528, entitled “LDPC BASE GRAPH SELECTION SYSTEMS AND METHODS,” filed on August 12, 2022, which is expressly incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates generally to communication systems, and more particularly to basegraph selection for low-density parity-check (LDPC) code design. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, or even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continued mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0006] A simplified summary of one or more aspects is presented below to provide a basic understanding of these aspects. This summary is not an extensive review of all contemplated aspects. This summary is neither intended to identify key or important elements of all aspects, nor to describe 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 a more detailed description presented later.

[0007] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may have a memory and at least one processor coupled to the memory at a first device. Based at least in part on information stored in the memory, the at least one processor may be configured to select a basemap from a plurality of basemaps based on information associated with a second device. The information associated with the second device may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) indication from the second device. Based at least in part on information stored in the memory, the at least one processor may be further configured to output a low-density parity check (LDPC) decoded transmission to the second device based on the selected basemap.

[0008] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may have a memory and at least one processor coupled to the memory at a second device. Based at least in part on information stored in the memory, the at least one processor may be configured to select a basemap from a plurality of basemaps based on information associated with the second device. The information associated with the second device may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of a component carrier (CC), or (k) second bandwidth of a transmission. Based at least in part on information stored in the memory, the at least one processor may be further configured to receive an LDPC decoded transmission from the first device based on the selected basemap.

[0009] To achieve the aforementioned and related purposes, one or more aspects include the features fully described below and specifically pointed out in the claims. The following description and the accompanying drawings set forth in detail some exemplary features of one or more aspects. However, these features are only indicative of only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0011] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0012] Figure 2B is a diagram illustrating an example of DL channels within a subframe according to various aspects of the present disclosure.

[0013] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0014] Figure 2D is a diagram illustrating an example of UL channels within a subframe according to various aspects of the present disclosure.

[0015] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0016] Figure 4 is a diagram illustrating an example of a parity check matrix (PCM) structure for a low-density parity-check (LDPC) code.

[0017] Figure 5 is a diagram illustrating rate graphs for different example base graph types.

[0018] Figure 6 are diagrams of performance graphs illustrating different example base graph types.

[0019] Figure 7 is a network connection flow diagram illustrating an example of a pair of wireless devices configured to select an LDPC base graph according to various aspects of the present disclosure.

[0020] Figure 8 is a network connection flow chart illustrating an example of another pair of wireless devices configured to select an LDPC base graph according to various aspects of the present disclosure.

[0021] Fig. 9 is a flow chart of a method of wireless communication.

[0022] Fig.10 is a flow chart of a method of wireless communication.

[0023] Fig.11 is a flow chart of a method of wireless communication.

[0024] Fig.12 is a flow chart of a method of wireless communication.

[0025] Fig.13 is a flow chart of a method of wireless communication.

[0026] Fig.14 are diagrams illustrating examples of hardware implementations of example devices and / or network entities.

[0027] Fig.15 is a diagram illustrating an example of a hardware implementation for an example network entity. DETAILED DESCRIPTION

[0028] Wireless devices such as UE and network entities (e.g., base stations, components of base stations) can be configured to support higher throughput. Additional computing power can be used at the receiver to improve the throughput of wireless devices. For example, doubling the throughput can use doubling the modem area and energy consumption of a receiving device with the same processing node size. Compared with using a transmission with a lower throughput, it may be advantageous to enable wireless devices supporting higher throughput to use a transmitter and / or receiver algorithm with less computational complexity (e.g., per bit). An LDPC decoder with lower complexity can use less energy consumption, but it may also have reduced performance. A low-performance LDPC decoder may cause failed reception transmission. Therefore, various aspects provided herein help reduce the complexity of the LDPC decoder while maintaining the performance of the LDPC decoder.

[0029] The base graph of the LDPC decoder may be selected by the transmitting wireless device based on one or more configuration parameters of the receiving wireless device. For example, the transmitting device may select a base graph from a plurality of base graphs based on information associated with a second device. The information associated with the second device may include at least one of the following: (a) decoding complexity of the receiving device, (b) device category of the receiving device, (c) capability of the receiving device, (d) decoder mode of the receiving device, (e) receiver complexity of the receiving device, (f) receiver mode of the receiving device, (g) power consumption of the receiving device, (h) power mode of the receiving device, or (i) indication from the receiving device. The transmitting device may output the LDPC decoding to the second device based on the selected base graph. As a corollary, the base graph of the LDPC decoder may be selected by the receiving wireless device based on one or more configuration parameters of the receiving wireless device. For example, the receiving device may select a base graph from a plurality of base graphs based on information associated with the receiving device. The information associated with the receiving device may include at least one of the following: (a) decoding complexity of the receiving device, (b) device class of the receiving device, (c) capabilities of the receiving device, (d) decoder mode of the receiving device, (e) receiver complexity of the receiving device, (f) receiver mode of the receiving device, (g) power consumption of the receiving device, (h) power mode of the receiving device, (i) indication from the receiving device, (j) first bandwidth of CC, or (k) second bandwidth of transmission. The receiving device may also be configured to receive LDPC decoded transmission from the transmitting device based on the selected base map.

[0030] The detailed description set forth below in conjunction with the accompanying drawings is a description of various configurations and does not represent the only configurations with which the concepts described herein can be practiced. In order to provide a thorough understanding of the various concepts, the specific embodiments include specific details. However, these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid blurring these concepts.

[0031] Several aspects of the telecommunication system are also presented with reference to various apparatuses and methods. These apparatuses and methods are described in the following detailed description and 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. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0032] As an example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system", which includes 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, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gate logic components, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, processes, functions, or any combination thereof.

[0033] Thus, in one or more example aspects, specific implementations and / or use cases, the described functionality may be implemented in hardware, software, or any combination thereof. If implemented in software, the functionality may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, such computer-readable media may include 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 these types of computer-readable media, or any other media that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.

[0034] Although various aspects, specific implementations and / or use cases are described in this application by the illustration of some examples, additional or different aspects, specific implementations and use cases may be generated in many different arrangements and scenarios. The various aspects, specific implementations and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes and packaging arrangements. For example, aspects, specific implementations and / or use cases can be generated via integrated chip specific implementations and other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / purchase equipment, medical equipment, devices that enable artificial intelligence (AI), etc.). Although some examples may be specifically for use cases or applications, or may not be specifically for use cases or applications, the described examples may have a wide range of applicability. Aspects, specific implementations and / or use cases may be in the range from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to the range of aggregated, distributed or original equipment manufacturer (OEM) devices or systems in conjunction with one or more technologies herein. In some practical environments, the equipment in conjunction with the various aspects and features described may also include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / accumulators, etc.) The various techniques described herein can be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc., of various sizes, shapes, and configurations.

[0035] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or a network equipment (such as a base station (BS), or one or more units (or one or more components) that perform base station functionality can be implemented in an aggregated architecture or a decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0036] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0037] Base station operation or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as that initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0038] Figure 1 1 is a diagram 100 illustrating an example of a wireless communication system and an access network. The illustrated wireless communication system includes a disaggregated base station architecture. The disaggregated base station architecture may include one or more CUs 110 that may communicate directly with a core network 120 via a backhaul link, or indirectly with the core network 120 through one or more disaggregated base station units, such as a near real-time (near RT) RAN intelligent controller (RIC) 125 via an E2 link, or a non-real-time (non-RT) RIC 115 associated with a service management and orchestration (SMO) framework 105, or both. The CU 110 may communicate with one or more DUs 130 via corresponding midhaul links, such as an F1 interface. The DU 130 may communicate with one or more RUs 140 via corresponding fronthaul links. The RU 140 may communicate with corresponding UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 140.

[0039] Each of the units (i.e., CU 110, DU 130, RU 140, and near-RT RIC 125, non-RT RIC 115, and SMO framework 105) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to the communication interfaces of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface configured to receive or send signals to one or more of the other units on a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0040] In some aspects, CU 110 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 110. CU 110 may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 110 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 110 may be implemented to communicate with DU 130 for network control and signaling.

[0041] DU 130 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 140. In some aspects, DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) depending at least in part on a functional split such as that defined by 3GPP. In some aspects, DU 130 may further host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 130 or with control functions hosted by CU 110.

[0042] The lower layer functionality may be implemented by one or more RUs 140. In some deployments, the RU 140 controlled by the DU 130 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on functional splitting (such as lower layer functional splitting). In such an architecture, the RU 140 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of communicating with the control plane and user plane of the RU 140 may be controlled by the corresponding DU 130. In some scenarios, this configuration may enable the implementation of the DU 130 and the CU 110 in a cloud-based RAN architecture (such as a vRAN architecture).

[0043] The SMO framework 105 may be configured to support RAN deployment and configuration of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 105 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 110, DU 130, RU 140, and near-RT RIC 125. In some specific implementations, the SMO framework 105 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 111) via the O1 interface. Additionally, in some specific implementations, the SMO framework 105 may communicate directly with one or more RUs 140 via the O1 interface. The SMO framework 105 may also include a non-RT RIC 115 configured to support the functionality of the SMO framework 105 .

[0044] The non-RT RIC 115 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 125. The non-RT RIC 115 may be coupled to or communicate with the near-RT RIC 125 (such as via an A1 interface). The near-RT RIC 125 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 110, one or more DUs 130, or both, and O-eNBs with the near-RT RIC 125.

[0045] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 125, the non-RT RIC 115 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 125 and may be received from a non-network data source or from a network function at the SMO framework 105 or the non-RT RIC 115. In some examples, the non-RT RIC 115 or the near-RT RIC 125 may be configured to adjust RAN behavior or performance. For example, the non-RT RIC 115 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 105 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0046] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Therefore, the base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component is indicated by a dotted line to indicate that each component may be included in the base station 102, or may not be included in the base station). The base station 102 provides an access point to the core network 120 for the UE 104. The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). Small cells include femto cells, pico cells, and micro cells. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). The communication link between RU 140 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to RU 140 and / or downlink (DL) (also known as forward link) transmission from RU 140 to UE 104. The communication link may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link may be through one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz, etc.) bandwidth. The carriers may be adjacent to each other 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 ​​compared to UL). The component carrier 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).

[0047] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL wireless wide area network (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). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, Bluetooth, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0048] The wireless communication system may also include a Wi-Fi AP 150 that communicates with a UE 104 (also referred to as a Wi-Fi station (STA)) via a communication link 154, for example, in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the UE 104 / AP 150 may perform a clear channel assessment (CCA) to determine whether a channel is available prior to communication.

[0049] 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 designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0050] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz–24.25 GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations 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 band.

[0051] In view of the above, unless otherwise specified, if the term "6 GHz or less" is used in this document, it can broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specified, if the term "millimeter wave" is used in this document, it can broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2 and / or FR5, or may be within the EHF band.

[0052] The base station 102 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 102 may send a beamformed signal 182 to the UE 104 in one or more transmit directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more receive directions. The UE 104 may also send a beamformed signal 184 to the base station 102 in one or more transmit directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 102 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of the base station 102 / UE 104. The transmit direction and receive direction of the base station 102 may be the same or may not be the same. The transmit direction and receive direction of the UE 104 may be the same or may not be the same.

[0053] The base station 102 may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, 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), a network node, a network entity, a network equipment, or some other suitable term. The base station 102 may be implemented as an integrated access backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station with a baseband unit (BBU) (including a CU and a DU) and a RU, or as a disaggregated base station including one or more of a CU, a DU, and / or a RU. A set of base stations that may include disaggregated base stations and / or aggregated base stations may be referred to as a next generation (NG) RAN (NG-RAN).

[0054] The core network 120 may include an access and mobility management function (AMF) 161, a session management function (SMF) 162, a user plane function (UPF) 163, a unified data management (UDM) 164, one or more location servers 168, and other functional entities. AMF 161 is a control node that handles signaling between UE 104 and core network 120. AMF 161 supports registration management, connection management, mobility management, and other functions. SMF 162 supports session management and other functions. UPF 163 supports packet routing, packet forwarding, and other functions. UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identity handling, access authorization, and subscription management. One or more location servers 168 are illustrated as including a gateway mobile location center (GMLC) 165 and a location management function (LMF) 166. However, in general, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, the LMF 166, the positioning determination entity (PDE), the serving mobile location center (SMLC), the mobile positioning center (MPC), etc. The GMLC 165 and the LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. The LMF 166 receives measurement results and auxiliary information from the NG-RAN and the UE 104 via the AMF 161 to calculate the positioning of the UE 104. The NG-RAN may determine the positioning of the UE 104 using one or more positioning methods. Positioning the UE 104 may involve signal measurements, positioning estimates, and optional speed calculations based on these measurements. Signal measurements may be performed by the UE 104 and / or the serving base station 102. The measured signals may be based on a satellite positioning system (SPS) 170 (e.g., one or more of a global navigation satellite system (GNSS), a global positioning system (GPS), a non-terrestrial network (NTN), or other satellite positioning / location systems), LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS), sensor-based information (e.g., an atmospheric pressure sensor, a motion sensor), an NR enhanced cell ID (NR E-CID) method, NR signals (e.g., multi-round trip time (multi-RTT), DL angle of departure (DL-AoD), DL time difference of arrival (DL-TDOA), UL time difference of arrival (UL-TDOA), and UL angle of arrival (UL-AoA) positioning), and / or one or more of other systems / signals / sensors.

[0055] Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet computers, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare equipment, implants, sensors / actuators, displays, or any other similarly functional devices. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as stations, mobile stations, subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, user agents, mobile clients, clients, or some other suitable terminology. In some scenarios, the term UE may also be applied to one or more supporting devices, such as in a device cluster arrangement. One or more of these devices may access the network collectively and / or individually.

[0056] Reference again Figure 1 In certain aspects, the UE 104 may be configured to use the LDPC transmit component 198 to select a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device class of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device. The LDPC transmit component 198 may also be configured to output a low-density parity check (LDPC) decoded transmission to the second device based on the selected basemap. In certain aspects, the UE 104 may be configured to use the LDPC receiving component 199 to select a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of a component carrier (CC), or (k) second bandwidth of a transmission. The LDPC receiving component 199 may also be configured to receive an LDPC decoded transmission from the first device based on the selected basemap.

[0057] In certain aspects, the base station 102 may be configured to use the LDPC transmit component 198 to select a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device. The LDPC transmit component 198 may also be configured to output an LDPC decoded transmission to the second device based on the selected basemap. In certain aspects, the base station 102 may be configured to use the LDPC receiving component 199 to select a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device class of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of a component carrier (CC), or (k) second bandwidth of a transmission. The LDPC receiving component 199 may also be configured to receive an LDPC decoded transmission from the first device based on the selected basemap. Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies. Although the following description may focus on LDPC code design for high throughput use cases, LDPC code design may also be used to save power at a wireless device (e.g., UE) by opportunistically selecting a low complexity decoder. For example, similar aspects may also apply to opportunistically select a low complexity decoder if the wireless device wishes to change to a power save mode even when throughput is not very high.

[0058] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D FIG280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or may be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A , Figure 2CIn the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (most of which are DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with slot format 1 (all of which are UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0 to 61. Slot formats 0 and 1 are both DL and both UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. The slot format is configured for the UE via a received slot format indicator (SFI) (dynamically configured via DL control information (DCI) or semi-statically / statically configured via radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0059] FIG. 2A to FIG. 2D The frame structure is illustrated, and various aspects of the present disclosure may be applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 subframes of the same size (1ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4 or 2 symbols. Each time slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is conventional or extended. For a conventional CP, each time slot may include 14 symbols, and for an extended CP, each time slot may include 12 symbols. The symbol on the DL may be a CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbol (also known as a single carrier frequency division multiple access (SC-FDMA) symbol) (for power-limited scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the CP and parameter set. The parameter set defines the subcarrier spacing (SCS) and effectively defines the symbol length / duration, which is equal to 1 / SCS.

[0060]

[0061] For normal CP (14 symbols / slot), different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, parameter set 2 allows 4 slots per subframe. Accordingly, for normal CP and parameter set μ, there are 14 symbols / slot and 2 μ timeslots / subframe. The subcarrier spacing can be equal to 2 μ*15kHz, where μ is parameter set 0 to 4. Therefore, the subcarrier spacing for parameter set μ=0 is 15kHz, and the subcarrier spacing for parameter set μ=4 is 240kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIG. 2A to FIG. 2D An example of a parameter set μ=2 with a normal CP of 14 symbols per slot and 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is about 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP may have a specific parameter set and CP (normal or extended).

[0062] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending over 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.

[0063] like Figure 2A As illustrated, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) (indicated as R for a particular configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0064] Figure 2BExamples of various DL channels within a subframe of a frame are illustrated. A physical downlink control channel (PDCCH) carries DCI within 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 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within a 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., a common search space, a UE-specific search space) during a PDCCH monitoring opportunity on a CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies on the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identification. A secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the system frame number (SFN) and the number of RBs in the system bandwidth. The physical downlink shared channel (PDSCH) carries user data, broadcast system information such as system information blocks (SIBs) that are not sent via the PBCH, and paging messages.

[0065] like Figure 2C As illustrated, some of the REs carry DM-RS (indicated as R for a particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may send a DM-RS for a physical uplink control channel (PUCCH) and a DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first one or two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, different configurations may be used to send the PUCCH DM-RS. The UE may send a sounding reference signal (SRS). The SRS may be sent in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the comb teeth. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0066] Figure 2DExamples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (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)). The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0067] Figure 3 370 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, Internet Protocol (IP) packets may be provided to a controller / processor 375. The 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. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0068] The transmit (Tx) processor 316 and receive (Rx) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transmission channel, forward error correction (FEC) decoding / decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The Tx processor 316 handles the mapping to the signal constellation diagram 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 can then be divided into parallel streams. Subsequently, each stream can be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes, as well as for spatial processing. Channel estimates may be derived from reference signals and / or channel state feedback sent by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier with a corresponding spatial stream for transmission.

[0069] At the UE 350, each receiver 354Rx receives a signal through its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides the information to a receive (Rx) processor 356. The Tx processor 368 and the Rx processor 356 implement layer 1 functionality associated with various signal processing functions. The Rx processor 356 can perform spatial processing on the information to recover any spatial stream destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can 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 and the reference signal are recovered and demodulated by determining the most likely signal constellation point sent by the base station 310. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by the base station 310. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.

[0070] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0071] Similar to the functions described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0072] Channel estimates derived by the channel estimator 358 from a reference signal or feedback sent by the base station 310 may be used by the Tx processor 368 to select appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the Tx processor 368 may be provided to different antennas 352 via separate transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a corresponding spatial stream for transmission.

[0073] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318Rx receives a signal through its corresponding antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to an Rx processor 370.

[0074] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0075] At least one of the Tx processor 368, the Rx processor 356, and the controller / processor 359 may be configured to perform Figure 1 At least one of the Tx processor 368, the Rx processor 356, and the controller / processor 359 may be configured to perform the Figure 1 The LDPC receiving component 199 combines various aspects.

[0076] At least one of the Tx processor 316, the Rx processor 370, and the controller / processor 375 may be configured to perform Figure 1 At least one of the Tx processor 316, the Rx processor 370, and the controller / processor 375 may be configured to perform the Figure 1 The LDPC receiving component 199 combines various aspects.

[0077] Wireless devices such as UE and network entities (e.g., base stations, components of base stations) can be configured to support higher throughput. Improving the throughput of wireless devices can use additional computing power at the receiver. For example, doubling the throughput can use the modem area and energy consumption of the receiving device with the same processing node size to double. Compared with the transmission using lower throughput, it may be advantageous to enable wireless devices supporting higher throughput to use transmitters and / or receiver algorithms with less computational complexity (e.g., per bit). Changing the configuration of channel decoding can reduce the computational complexity at the receiver. For example, LDPC codes can have flexible decoding complexity by changing the number of iterations. For example, for a message passing decoder, the complexity can be linearly scaled with the number of iterations, and the throughput can have an inverse linear scaling with the number of iterations. However, the performance of LDPC decoding may decrease with the reduction of the number of iterations. For example, NR LDPC codes can be optimized for a larger number of iterations (e.g., more than 50 times), and can provide reduced performance when a smaller number of iterations is used.

[0078] Figure 4A parity check matrix (PCM) structure 400 for an LDPC code is shown. Such a code may be a quasi-cyclic (QC). An LDPC code may be described by a base graph (BG) and a boost (i.e., a protograph LDPC code). A BG or protograph may be a graph that captures the macroscopic properties of a code, such as the threshold of a code on a binary input additive white Gaussian noise (AWGN) channel. A base graph may be represented by a basic matrix, the information columns of which may represent variable nodes, and rows may represent check nodes of the base graph. For example, a PCM structure 400 may represent a base graph having an information column 402, a core parity check column 404, and an extended parity check column 412. The information column 402 may include a punctured information column 401 and a special extended check 410. The PCM structure 400 may also have a core check 406 and an extended check 408. Each entry in the entry of the basic PCM structure 400 may be boosted by a cyclic identity matrix. In other words, the BG may be replicated Z times, and different copies of the BG may be connected via edge permutations. The identity matrix may have dimensions of Z x Z, where a circulant matrix may be represented by integers in the non-zero entries of the BG matrix. For example, a circulant matrix 414 may be constructed where Z ≤ 384. The total block length may be the size of BG x Z (e.g., where Z may be referred to as a lifting value that lifts the information of the BG to a larger matrix size).

[0079] Figure 5 A code rate diagram 500 of an LDPC base graph 502 (i.e., BG1) and an LDPC base graph 504 (i.e., BG2) is shown. Each LDPC base graph 502, 504 may have different performance in different regimes of communication parameters (e.g., block length, decoding rate, number of iterations, decoder design). For example, the base graph 504 may have a code rate from 0 to 0.95 for a TBS less than 292, a code rate from 0 to 0.67 for a TBS greater than 292 and less than 3824, and a code rate from 0 to 0.25 for a TBS greater than 3824. The LDPC base graph 502 may have a code rate from 0.67 to 0.95 for a TBS greater than 292 and less than 3824, and a code rate from 0.25 to 0.95 for a TBS greater than 3824. Multiple basemaps may be provided, and one basemap may be selected in preference to another based on one or more parameters, such as coding rate and / or payload size (eg, TBS), rather than a generic BG that performs best in all regions.

[0080] The base graph selection system may use a metric that evaluates the performance of LDPC codes generated by different LDPC BGs to select an appropriate LDPC BG. For example, a threshold for codes on a binary input AWGN channel may be used to select an appropriate LDPC BG. The threshold metric may be defined as the minimum signal-to-noise ratio (SNR) at which the average block error rate (BER) of any LDPC code of infinite size generated by the BG is below a certain BER threshold (e.g., as an example, the BER threshold may be 10 -6 ). The threshold value may depend on the decoder details and / or information. For example, a floating point decoder may have a different threshold value than a fixed point decoder. A floating point decoder may use one or more real numbers as input and perform operations (e.g., addition, multiplication) on the input to generate a real number output. A fixed point decoder may use one or more quantized signals of a fixed number of bits as input and perform operations (e.g., operations) on the input within a finite field of a fixed number of bits to generate an output having a fixed number of bits. A flooding scheduling algorithm may have a different threshold value than a hierarchical scheduling algorithm. A flooding scheduling algorithm may use a decoding schedule that updates a set of variable nodes and then performs a check node update on the updated set of nodes. A flooding scheduling algorithm may update all variable nodes at the same time and then perform a check node update on all updated nodes at the same time. A hierarchical scheduling algorithm may use a decoding schedule that updates one or more variable nodes and / or one or more check nodes in a specified order. This order may be based on the layer to which the node belongs. For example, according to a hierarchical scheduling algorithm, a node in a first layer may be updated before a node in a second layer.

[0081] The first number of iterations (e.g., flooding iterations or layered iterations) for a decoder may have a threshold value different from a second number of iterations (e.g., flooding iterations or layered iterations) for a decoder. A first bit amount for log-likelihood ratio (LLR) quantization at a decoder may have a threshold value different from a second bit amount for LLR quantization at a decoder. In some aspects, extrinsic information transfer (EXIT) analysis, proto-EXIT (PEXIT) analysis, and / or density evolution may be used to calculate such a threshold value. PEXIT analysis may provide an accurate proxy to predict the performance of an actual LDPC code to calculate a threshold metric.

[0082] The computational complexity of LDPC decoder can be linearly scaled with the number of iterations that can be used in decoding. As a result, a way to reduce the complexity of LDPC decoder is to reduce the number of iterations used by decoder. However, if the number of iterations has reduced the threshold margin, this may be at the expense of performance. For example, the performance gap between 25 iterations and 3 iterations of LDPC decoder can be about 2dB. Therefore, it is necessary to reduce the complexity of LDPC decoder when the performance cost of LDPC decoder is not significantly reduced.

[0083] As presented herein, a device may select a base graph of an LDPC decoder based on one or more configuration parameters of a receiving wireless device. For example, a transmitting device may select a base graph from a plurality of base graphs based on information associated with a receiving device. The information associated with the receiving device may include at least one of the following: (a) decoding complexity of the receiving device, (b) device category of the receiving device, (c) capability of the receiving device, (d) decoder mode of the receiving device, (e) receiver complexity of the receiving device, (f) receiver mode of the receiving device, (g) power consumption of the receiving device, (h) power mode of the receiving device, or (i) indication from the receiving device. The transmitting device may output an LDPC decoding to a second device based on the selected base graph. As a corollary, a base graph of an LDPC decoder may be selected by a receiving wireless device based on one or more configuration parameters of the receiving wireless device. For example, a receiving device may select a base graph from a plurality of base graphs based on information associated with the receiving device. The information associated with the receiving device may include at least one of the following: (a) decoding complexity of the receiving device, (b) device class of the receiving device, (c) capabilities of the receiving device, (d) decoder mode of the receiving device, (e) receiver complexity of the receiving device, (f) receiver mode of the receiving device, (g) power consumption of the receiving device, (h) power mode of the receiving device, (i) indication from the receiving device, (j) first bandwidth of CC, or (k) second bandwidth of transmission. The receiving device may also be configured to receive LDPC decoded transmission from the transmitting device based on the selected base map.

[0084] Figure 6A performance graph 600 is shown illustrating how different base graphs BG 602 and BG 604 may perform relative to each other depending on the number of iterations used by an LDPC decoder based on the base graph. Performance graph 600 illustrates the performance of BG 602 and BG 604 relative to Shannon SNR 606 (e.g., the SNR value when Shannon capacity equals the code rate). BG 602 and BG 604 represent base graphs with different performance at a first level of complexity and a second level of complexity. For example, BG 604 has better SNR performance than BG 602 when less than about 10 iterations, while BG 602 has better SNR performance than BG 604 when greater than about 10 iterations. BG 602 may represent an NR BG (e.g., BG1) with two puncturing nodes, a decoding rate of 0.88, and a BG size of 5x 27. BG 602 may have the same block length and coding rate as BG1. BG 604 may represent a regular LDPC generated by having the same amount of variability and the same amount of check. Other BGs may be utilized that have different performance at different levels of complexity relative to each other, which may result in one BG being preferred at a first level of complexity and a different BG being preferred at a second level of complexity. Although two BGs are shown, the system may select from a set of more than two BGs to optimize performance.

[0085] BG 602 may outperform BG 604 at an iteration number greater than about 10. BG 602 may have a better threshold than BG 604 at an infinite number of iterations. BG 602 may be optimized at an infinite number of iterations. BG 604 may outperform BG 602 at a smaller iteration number less than about 10. For example, at 5 iterations, BG 604 may outperform BG 602 by about 0.5 dB. BG 602 and BG 604 may be used as two base graphs from which a wireless device may select for an LDPC decoding scheme and / or decoding complexity.

[0086] Enables wireless devices to Figure 6 Among BG 602 and BG 604, BGs whose SNR performance metrics intersect with each other as the number of iterations changes are selected, which allows the wireless device to optimize the LDPC decoding scheme using BG 604 for a high number of iterations greater than about 10 and using BG 602 for a low number of iterations less than about 10.

[0087] A code instance generated using a first BG (e.g., BG 604) may have better performance than a second BG (e.g., BG 602) at a lower number of iterations, and may have worse performance than the second BG at a larger number of iterations. The performance metric may be calculated as a block error rate (BLER) or a bit error rate (BER) at a specific SNR, packet size, and coding rate. The wireless device may select between BG 602 and BG 604 to prioritize decoding performance or to prioritize decoding complexity. For example, in response to the wireless device being configured to prioritize performance, the wireless device may select BG 602 and use a larger number of iterations. In response to the wireless device being configured to prioritize low complexity, the wireless device may select BG 604 and have the receiver use fewer iterations and reduce complexity. In some aspects, the first BG may have better performance than the second BG when the number of iterations is less than or equal to 10, 11, or 12 for layered decoding, or the number of iterations is less than or equal to 20, 21, 22, or 24 for flooding iterations.

[0088] At a smaller number of iterations, the threshold metric of the first BG (e.g., BG 604) may be lower than the threshold metric of the second BG (e.g., BG 602). For a given coding rate, at a larger number of iterations, the threshold metric of the first BG may be higher than the threshold metric of the second BG. The threshold metric may be calculated by using simulation or measuring performance via PEXIT analysis.

[0089] The threshold metric of the LDPC code generated by the first BG (eg, BG 604) may converge to a final threshold metric (ie, a threshold metric at infinite iterations) faster than the LDPC code generated by the second BG (eg, BG 602).

[0090] When decoding with a decoder having a lower number of quantization bits, a code instance generated by a first BG (e.g., BG 604) may have better performance than a code instance generated by a second BG (e.g., BG 602), but when decoding with a decoder having a higher number of quantization bits, the code instance generated by the first BG may have worse performance than the code instance generated by the second BG. In other words, when the LLR is heavily quantized, the code instance generated by the first BG may have better performance than the second BG, but may have worse performance using a lightly quantized decoder. The decoding complexity may be linearly proportional to the number of quantization bits used by the decoder to quantize and process the received signal. In such aspects, a lower number of quantization bits may be used to achieve lower complexity. When using a decoder having a lower number of quantization bits, the threshold metric of the first BG may be lower than the threshold metric of the second BG, and when using a decoder having a higher number of quantization bits, the threshold metric of the first BG may be higher than the threshold metric of the second BG.

[0091] The minimum decoding rate supported by the first BG (e.g., BG 604) may be greater than the minimum decoding rate supported by the second BG (e.g., BG 602). For example, the minimum decoding rate supported by the second BG may be 1 / 3 or 1 / 5, and the minimum decoding rate supported by the first BG may be 1 / 2. In some embodiments, one BG may have a higher maximum decoding rate than other BGs. In some embodiments, one BG may have a higher minimum decoding rate than other BGs. Since each BG may support more than one decoding rate, the wireless device may compare the decoding rate range of the first BG with the decoding rate range of the second BG to determine which decoding rate may have a higher maximum or minimum decoding rate value relative to another BG. Such decoding rates can be used to select a BG versus another BG, for example, a wireless device may be configured to select another BG having a higher maximum decoding rate or a higher minimum decoding rate than a BG available to the wireless device.

[0092] When using lower order modulation (e.g., quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (16QAM)), the code generated from the first BG (e.g., BG 604) may have similar or worse performance than the code generated from the second BG (e.g., BG 602). When using higher order modulation (e.g., a modulation order exceeding a threshold), the code generated from the first BG may have better performance than the code generated from the second BG.

[0093] The system may select a BG over another BG based on one or more configuration parameters. For example, the system may select a first BG over a second BG when one or more of the following conditions are met: (a) the coding rate meets or exceeds a threshold (e.g., 2 / 3, 3 / 4, or 4 / 5), (b) the TB size meets or exceeds a threshold size, (c) the number of code blocks (CBs) per TB meets or exceeds a threshold, (d) the modulation and coding scheme (MCS) meets or exceeds a threshold, (e) the order of modulation meets or exceeds a threshold (e.g., 64 quadrature amplitude modulation (64QAM) or above), (f) the number of layers used for transmission meets or exceeds a threshold, (g) the transmission is a DL transmission (e.g., For example, the first BG may be used for DL ​​but not UL), (h) the transmission is a UL transmission (e.g., the first BG may be used for UL but not DL), (i) the transmission is a sidelink transmission (e.g., the first BG may be used for sidelink but not UL or DL), (j) limited buffer rate matching (LBRM) is enabled (e.g., when LBRM is enabled for a specified TB, the use of the first BG may be authorized), (k) service characteristics are detected (e.g., the use of the first BG may be authorized for certain service characteristics), (l) a quality of service (QoS) metric meets or exceeds a threshold, or (m) a priority of the transmission meets or exceeds a threshold. A wireless device (such as a UE) may determine the specified TB based on the maximum number of RBs in a CC, the maximum number of MIMO layers configured on the CC, and / or the highest modulation order configured in the CC.

[0094] Enabling a wireless device to select a BG from multiple base graphs allows the wireless device to optimize the LDPC encoding / decoding scheme based on one or more properties of the multiple base graphs. One BG may be better used for a first scenario, while another BG may be better used for a second scenario. In addition, the system may prioritize different performance metrics based on one or more configuration parameters. For example, using a first set of configuration parameters, the system may prioritize BGs with higher decoding performance (e.g., lower bit error rate (BER) or block error rate (BLER)), and using a second set of configuration parameters, the system may prioritize BGs with lower decoder / receiver complexity (e.g., higher throughput). In some aspects, the performance metric may be calculated as a BLER or BER at a specific SNR and packet size. Enabling a wireless device to select a BG from multiple BGs allows the wireless device to prioritize different performance metrics based on the changed configuration parameters.

[0095] A wireless device (such as a UE) may be configured to recommend a selection of a BG, or may be configured to provide configuration parameters that can be used to recommend a selection of a BG. For example, the performance of an LDPC code instance generated by a BG may depend on a specific decoder implemented and / or used by the UE, but a network entity may not have any information about what decoder the UE plans to use for decoding. Therefore, a wireless device may recommend a BG to be used to another wireless device.

[0096] In one aspect, the wireless device may set a configuration parameter to switch to a lower complexity decoder and / or a low complexity decoding mode. In response, the wireless device may select a BG with better decoding performance for the lower complexity decoder and / or the low complexity decoding mode. The wireless device may provide a recommendation in a CSI report. For example, the CSI report may have one or more bits that can be used to select a preferred BG from a plurality of BGs. The wireless device may output the CSI report to another wireless device, which may select a BG with better decoding performance for the lower complexity decoder and / or the low complexity decoding mode based on the CSI report.

[0097] In another aspect, a wireless device may indicate to another wireless device to switch to a low complexity decoder. For example, a first wireless device may indicate that the new decoder has fewer iterations or uses fewer bits for LLR quantization. In response, the second wireless device may select a BG based on the decoder used by the first wireless device.

[0098] On the other hand, the wireless device may be configured to generate one or more CQI reports. For example, the wireless device may generate a first CQI report for a first BG and a second CQI report for a second BG. The wireless device may generate CQI reports that report absolute CQI values ​​in each report. On the other hand, the wireless device may generate a CQI report that reports one or more absolute CQI values, and another CQI report that indicates a performance delta between the first BG and the second BG. In one aspect, if the wireless device is configured to use a low-complexity decoder, the CQI may indicate better performance of the first BG, and on the other hand, if the wireless device is configured to use a high-complexity decoder, the CQI may indicate poorer performance of the first BG. The wireless device may be configured to send one or more CQI reports in the CQI report to a second wireless device (e.g., a network entity) to allow the second wireless device to perform a similar analysis.

[0099] In another aspect, a wireless device may be configured to define and / or provide a new capability for a supported maximum data rate. The capability may be, for example, a UE capability of a UE. The capability may be included as a set of one or more wireless device configuration parameters provided to another wireless device, such as a network entity. The supported maximum data rate may indicate, for example, that the wireless device may support a first number of carriers, a second number of intra-band RBs, and / or a third number of frequency band combinations with a first decoding complexity (e.g., a conventional decoding complexity). The supported maximum data rate may indicate, for example, that the wireless device may support a fourth number of carriers, a fifth number of intra-band RBs, and / or a sixth number of frequency band combinations with a second decoding complexity (e.g., a reduced complexity decoding scheme). In the case where the second decoding complexity is a reduced complexity decoding scheme, the fourth number of carriers may be greater than the first number of carriers, and / or the fifth number of intra-band RBs may be greater than the second number of intra-band RBs.

[0100] Such a wireless device may semi-statically configure a decoder per CC and / or per frequency band. The decoder may be configured to have conventional decoding or reduced complexity decoding. The decoder configuration per CC and / or per frequency band may be based on a configuration from another wireless device, such as a configuration of a network entity per CC and / or per frequency band decoder configuration of a UE. The wireless device may dynamically determine the decoder type based on the instantaneous scheduled throughput per CC and / or per frequency band. The wireless device may dynamically determine the decoder type based on whether one or more of the following conditions are met: (a) the decoding rate meets or exceeds a threshold (e.g., 2 / 3, 3 / 4, or 4 / 5), (b) the TB size meets or exceeds a threshold size, (c) the number of code blocks (CBs) per TB meets or exceeds a threshold, (d) the modulation and coding scheme (MCS) meets or exceeds a threshold, (e) the modulation order meets or exceeds a threshold (e.g., 64 quadrature amplitude modulation (64QAM) or above), the number of layers used for transmission meets or exceeds a threshold, (f) the first BG may be used for DL ​​but not UL, (g) the first BG may be used for UL but not DL, (h) the first BG may be used for sidelink but not UL or DL, or (i) the first BG may be authorized for use when limited buffer rate matching (LBRM) is enabled for a specified TB.

[0101] In some aspects, the wireless device may be configured to indicate its capabilities such that the instantaneous maximum data rate does not exceed the throughput indicated for the reduced capacity decoding indicated in the capabilities. In some aspects, if normal decoding is semi-statically configured to the first wireless device by the second wireless device (e.g., configured to the UE by a network entity), the instantaneous maximum data rate may not exceed the throughput indicated for the normal decoding indicated in the capabilities.

[0102] Performance tests may be defined for a first decoding complexity (e.g., conventional decoding complexity) and a second decoding complexity (e.g., a reduced complexity decoding scheme). Similarly, performance tests may be defined for a first receiver (e.g., a conventional receiver) and a second receiver (e.g., a reduced complexity receiver). A receiver may contain both a decoder and additional components of a receiver chain (e.g., a demodulation component). A wireless device that uses a specified receiver to receive transmissions may be considered to be set in a receiver mode of the receiver. In one aspect, performance may be defined in terms of a reference sensitivity power level. The reference sensitivity power level may be the minimum average power applied to each of the antenna ports of a wireless device such as a UE, at which the throughput may meet or exceed the requirements of a specified reference measurement channel. For example, performance may be defined as a throughput that meets or exceeds 95% of the maximum throughput of a reference measurement channel at a received power equal to or greater than the reference sensitivity power level. The first decoding complexity (e.g., a reduced complexity decoding scheme) may have a reference sensitivity power level that is higher than the reference sensitivity power level of the second decoding complexity (e.g., a conventional, non-reduced complexity decoding scheme). In other words, a reference sensitivity power level of a first decoder (e.g., a reduced complexity decoder) may be defined as a power increment relative to a sensitivity power level of a reference decoder (e.g., a conventional decoder). On the other hand, a reference sensitivity power level of a first receiver (e.g., a reduced complexity receiver) may be defined as a power increment relative to a sensitivity power level of a reference receiver (e.g., a conventional receiver).

[0103] The results of the performance test may be used to determine the configuration to be used by the wireless device. For example, a basemap may be selected based on a comparison of throughput to a threshold. The wireless device may select a configuration based on the results of the performance test, or another wireless device such as a network entity may output the configuration to be used by the wireless device. For example, the performance test may indicate support for capabilities of a basemap associated with a level of decoding capability or receiver mode, one basemap for each decoding capability and / or receiver mode. The decoding complexity or receiver mode may be selected based on a configuration parameter of the wireless device. For example, when the wireless device is configured with a first number of frequency bands or CCs that meet or exceed a threshold, a first level of decoding complexity or a first level of receiver mode may be used, and when the wireless device is configured with a second number of frequency bands or CCs that meet or exceed a threshold, a second level of decoding capability or a second level of receiver mode may be used.

[0104] Figure 7A network connection flow diagram 700 is shown illustrating an example wireless device 702 and a wireless device 704. The wireless device 702 may be a UE or a network entity. The wireless device 704 may be configured to select a base graph at 714 for use by the wireless device 702 to decode an LDPC coded transmission 722.

[0105] The wireless device 702 may be configured to output the wireless device configuration parameters 706 to the wireless device 704. The wireless device configuration parameters may include, for example, decoding complexity of the wireless device 702, device category of the wireless device 702, capabilities of the wireless device 702, decoder mode of the wireless device 702, receiver complexity of the wireless device 702, receiver mode of the wireless device 702, power consumption of the wireless device 702, power mode of the wireless device 702, an indication from the wireless device 702, a first bandwidth of the CC, a second bandwidth of the transmission, one or more CQI reports corresponding to one or more BGs of the wireless device 702, a number of iterations at which one BG performs better than another BG, a threshold metric of the BGs, and a BG generated by the wireless device 702. The performance of the code instance generated by the wireless device 702, the minimum decoding rate supported by the BG at the number of iterations, the performance of the BG when the modulation order is used, the decoding rate of the wireless device 702, the TB size of the wireless device 702, the number of CBs per TB of the wireless device 702, the MCS value of the MCS of the wireless device 702, the number of layers used for transmission to the wireless device 702, whether the BG of the wireless device 702 can be used for DL ​​instead of UL, whether the BG of the wireless device 702 can be used for UL instead of DL, whether the BG of the wireless device 702 can be used for sidelink instead of Uu link, or whether BG can be authorized when LBRM is enabled for the TB of the wireless device 702. The decoding complexity of the wireless device 702 may include, for example: the number of code blocks per transport block, the MCS, the modulation order, the number of layers used for transmission, whether the communication direction is uplink, downlink or sidelink, whether limited buffer rate matching is enabled for the transport block, the maximum number of MIMO layers configured on the CC, or the highest modulation order configured in the CC.

[0106] One or more CQI reports may each correspond to a different BG. For example, the wireless device 702 may generate a first CQI report for a first BG and a second CQI report for a second BG. The wireless device 702 may generate a CQI report that reports an absolute CQI value in each report. On the other hand, the wireless device 702 may generate a CQI report that reports one or more absolute CQI values, and another CQI report that indicates a performance delta between the first BG and the second BG. In one aspect, if the wireless device 702 is configured to use a low-complexity decoder, the CQI may indicate better performance of the first BG, and on the other hand, if the wireless device 702 is configured to use a high-complexity decoder, the CQI may indicate poorer performance of the first BG.

[0107] The indication may include, for example, a basemap preference of the wireless device 702, decoder information of the wireless device 702, capability support for one or more basemaps of the wireless device 702 (e.g., support for capabilities of the basemap associated with a level of decoding capability or receiver mode), or a throughput of a reference measurement channel of the wireless device 702. The decoder information of the wireless device 702 may include, for example, a decoder mode of the wireless device 702 (i.e., which decoder complexity the wireless device 702 is using), a power mode of the wireless device 702, an amount of decoder iterations used by the wireless device 702 to decode an incoming transmission (such as an LDPC decoded transmission 722), or an amount of bits used for LLR quantization at the wireless device 702.

[0108] The wireless device 702 may also transmit one or more Tx reference signals (RS) 710 to the wireless device 704. At 712, the wireless device 704 may test the performance of the wireless device 702. For example, the wireless device 704 may test the throughput of the Tx RS signal, or may test the reference sensitivity power level of the wireless device 702. For example, the wireless device 704 may determine the minimum average power applied to each of the antenna ports of the wireless device 702, at which the throughput may meet or exceed the requirements of the specified reference measurement channel. In some aspects, the wireless device 704 may perform a PEXIT analysis to calculate one or more thresholds of the wireless device 702. In some aspects, the wireless device 704 may compare the measured throughput with the threshold of the reference measurement channel based on the reference sensitivity power level. If the comparison of the measured throughput meets or is above the threshold, the first BS may be selected, and if the comparison of the measured throughput meets or is below the threshold, the second BS may be selected.

[0109] At 714, the wireless device 704 may select a basemap based on one or more of the wireless device configuration parameters 706 or the results of the performance test at 712. The wireless device 704 may output a basemap configuration 716 to the wireless device 702, and the wireless device 702 may obtain the basemap configuration 716. The basemap configuration 716 may include a selection of the basemap selected by the wireless device at 714. The basemap configuration 716 may include one or more parameters that may be used by the wireless device 702 to select a basemap.

[0110] At 718, the wireless device 702 may select a base map to use based on the base map configuration 716. In the event that the base map configuration 716 includes a selection of a base map, the wireless device 702 may select the base map indicated by the base map configuration 716. In the event that the base map configuration 716 includes one or more parameters that may be used by the wireless device 702 to select a base map, the wireless device 702 may select the base map based on the parameters of the base map configuration 716. For example, the base map configuration may include, for example, an indication of a first capability to support a first base map associated with a first level of decoding complexity or a first receiver mode, and may include an indication of a second capability to support a second base map associated with a second level of decoding complexity or a second receiver mode. Then, when the wireless device 702 is configured with a first number of frequency bands or CCs greater than a threshold (which may be pre-configured by the wireless device 702 or may be provided in the basemap configuration 716), the wireless device 702 may use a first level of decoding complexity or a first receiver mode, or when the second device is configured with a second number of frequency bands or CCs less than the threshold, the wireless device 702 may use a second level of decoding complexity or a second receiver mode.

[0111] At 720, the wireless device 704 may encode the transmission using the selected base graph. The wireless device 704 may send the LDPC decoded transmission 722 to the wireless device 702. The wireless device 702 may obtain the LDPC decoded transmission 722 from the wireless device 704. At 724, the wireless device 702 may decode the LDPC decoded transmission 722 using the selected base graph.

[0112] Figure 8 A network connection flow diagram 800 illustrating an example wireless device 802 and a wireless device 804 is shown. The wireless device 802 may be a UE or a network entity. The wireless device 804 may be a UE or a network entity. The wireless device 802 may be configured to select a basemap at 816 to indicate to the wireless device 804 what basemap the wireless device 802 uses to decode the LDPC coded transmission 822.

[0113] The wireless device 802 may be configured to output wireless device configuration parameters 806 to the wireless device 804. The wireless device configuration parameters may include, for example, decoding complexity of the wireless device 802, device class of the wireless device 802, capabilities of the wireless device 802, decoder mode of the wireless device 802, receiver complexity of the wireless device 802, receiver mode of the wireless device 802, power consumption of the wireless device 802, power mode of the wireless device 802, an indication from the wireless device 802, a first bandwidth of the CC, a second bandwidth of the transmission, one or more CQI reports corresponding to one or more BGs of the wireless device 802, a number of iterations at which one BG performs better than another BG, a threshold metric of the BGs, and a BG generated by the wireless device 802. The performance of the code instance generated by the wireless device 802, the minimum decoding rate supported by the BG at the number of iterations, the performance of the BG when the modulation order is used, the decoding rate of the wireless device 802, the TB size of the wireless device 802, the number of CBs per TB of the wireless device 802, the MCS value of the MCS of the wireless device 802, the number of layers used for transmission to the wireless device 802, whether the BG of the wireless device 802 can be used for DL ​​instead of UL, whether the BG of the wireless device 802 can be used for UL instead of DL, whether the BG of the wireless device 802 can be used for sidelink instead of Uu link, or whether BG can be authorized when LBRM is enabled for the TB of the wireless device 802. The decoding complexity of the wireless device 802 may include, for example: the number of code blocks per transport block, the MCS, the modulation order, the number of layers used for transmission, whether the communication direction is uplink, downlink or sidelink, whether limited buffer rate matching is enabled for the transport block, the maximum number of MIMO layers configured on the CC, or the highest modulation order configured in the CC.

[0114] One or more CQI reports may each correspond to a different BG. For example, the wireless device 802 may generate a first CQI report for a first BG and a second CQI report for a second BG. The wireless device 802 may generate a CQI report that reports an absolute CQI value in each report. On the other hand, the wireless device 802 may generate a CQI report that reports one or more absolute CQI values, and another CQI report that indicates a performance delta between the first BG and the second BG. In one aspect, if the wireless device 802 is configured to use a low complexity decoder, the CQI may indicate better performance of the first BG, and on the other hand, if the wireless device 802 is configured to use a high complexity decoder, the CQI may indicate poorer performance of the first BG.

[0115] The indication may include, for example, a basemap preference of the wireless device 802, decoder information of the wireless device 802, capability support for one or more basemaps of the wireless device 802 (e.g., support for capabilities of the basemap associated with a level of decoding capability or receiver mode), or a throughput of a reference measurement channel of the wireless device 802. The decoder information of the wireless device 802 may include, for example, a decoder mode of the wireless device 802 (i.e., which decoder complexity the wireless device 802 is using), a power mode of the wireless device 802, an amount of decoder iterations used by the wireless device 802 to decode an incoming transmission (such as an LDPC decoded transmission 822), or an amount of bits used for LLR quantization at the wireless device 802.

[0116] The wireless device 802 may also transmit one or more Tx reference signals (RS) 810 to the wireless device 804. At 812, the wireless device 804 may test the performance of the wireless device 802. For example, the wireless device 804 may test the throughput of the Tx RS signal, or may test the reference sensitivity power level of the wireless device 802. For example, the wireless device 804 may determine the minimum average power applied to each of the antenna ports of the wireless device 802, at which the throughput may meet or exceed the requirements of the specified reference measurement channel. In some aspects, the wireless device 804 may perform a PEXIT analysis to calculate one or more thresholds of the wireless device 802. In some aspects, the wireless device 804 may compare the measured throughput with the threshold of the reference measurement channel based on the reference sensitivity power level. If the comparison of the measured throughput meets or is above the threshold, the first BS may be selected, and if the comparison of the measured throughput meets or is below the threshold, the second BS may be selected.

[0117] The wireless device 804 may output one or more basemap configuration parameters 814 to the wireless device 802, and the wireless device 802 may obtain the one or more basemap configuration parameters 814. The one or more basemap configuration parameters 814 may include one or more parameters that may be used by the wireless device 802 to select a basemap. The one or more basemap configuration parameters 814 may include, for example, performance test results from a performance test at 812.

[0118] At 816, the wireless device 802 may select a basemap based on at least one or more of the wireless device configuration parameters 806, parameters of the wireless device 802 that are not communicated to the wireless device 804, and / or one or more basemap configuration parameters 814. For example, the wireless device 802 may select a basemap based on a number of iterations that the wireless device 802 is using for its decoder, or may select a basemap based on a low power mode to minimize the complexity of the decoder used by the wireless device 802. In another aspect, the wireless device 802 may select a basemap based on the one or more basemap configuration parameters 814. For example, the basemap configuration may include, for example, an indication of a first capability to support a first basemap associated with a first level of decoding complexity or a first receiver mode, and may include an indication of a second capability to support a second basemap associated with a second level of decoding complexity or a second receiver mode. Then, when the wireless device 802 is configured with a first number of frequency bands or CCs greater than a threshold (which may be pre-configured by the wireless device 802 or may be provided in one or more basemap configuration parameters 814), the wireless device 802 may use a first level of decoding complexity or a first receiver mode, or when the second device is configured with a second number of frequency bands or CCs less than the threshold, the wireless device 802 may use a second level of decoding complexity or a second receiver mode.

[0119] The wireless device 802 may be configured to switch its mode to match the basemap selected at 816. For example, in the event that the basemap selected at 816 is associated with a decoder mode (e.g., normal decoder complexity, lower decoder complexity, higher decoder complexity), the wireless device 802 may be configured to switch the decoder mode of the wireless device 802 to the decoder mode associated with the selected basemap. In the event that the basemap selected at 816 is associated with a power mode (e.g., low power mode, normal power mode, high power mode), the wireless device 802 may be configured to switch the decoder mode of the wireless device 802 to the decoder mode associated with the selected basemap (e.g., low complexity basemap with low power mode, high complexity basemap with high power mode).

[0120] The wireless device 802 may output a basemap configuration 818 to the wireless device 804. The wireless device 804 may obtain the basemap configuration 818 from the wireless device 802. At 819, the wireless device 804 may select a basemap based on the basemap configuration 818. The basemap configuration 818 may include an indication of the basemap selected by the wireless device 802. The basemap configuration 818 may include an indication of the basemap preference of the wireless device 802.

[0121] At 820, wireless device 804 may encode a transmission using the selected base graph. Wireless device 804 may send an LDPC decoded transmission 822 to wireless device 802. Wireless device 802 may obtain LDPC decoded transmission 822 from wireless device 804. At 824, wireless device 802 may decode LDPC decoded transmission 822 using the selected base graph.

[0122] Fig. 9 900 is a flowchart of a method of wireless communication. The method may be performed by a first wireless device (e.g., UE 104, UE350; base station 102, base station 310; wireless device 702, wireless device 704, wireless device 802, wireless device 804; apparatus 1404; network entity 1402, network entity 1502). At 902, the first wireless device may select a base map from a plurality of base maps based on information associated with a second device. The information associated with the second device may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device. For example, 902 may be performed by Figure 7 The wireless device 704 in the embodiment may select the base map based on the information associated with the wireless device 702 at 714. The information associated with the wireless device 702 may include at least one of: (a) decoding complexity of the wireless device 702, (b) device category of the wireless device 702, (c) capability of the wireless device 702, (d) decoder mode of the wireless device 702, (e) receiver complexity of the wireless device 702, (f) receiver mode of the wireless device 702, (g) power consumption of the wireless device 702, (h) power mode of the wireless device 702, or (i) indication from the wireless device 702. 902 may also be performed by Fig.14 Medium or Fig.15 Component 198 in is executed.

[0123] At 904, the first wireless device may output an LDPC decoded signal to the second device based on the selected base graph. Figure 7 704 in the wireless device 704, which may output LDPC decoding to the wireless device 702 based on the base graph selected at 714 and send 722. 904 may also be performed by Fig.14 Medium or Fig.15 Component 198 in is executed.

[0124] Fig.101000 is a flowchart of a method of wireless communication. The method may be performed by a first wireless device (e.g., UE 104, UE 350; base station 102, base station 310; wireless device 702, wireless device 704, wireless device 802, wireless device 804; apparatus 1404; network entity 1402, network entity 1502). At 1002, the first wireless device may select a base map from a plurality of base maps based on information associated with a second device. The information associated with the second device may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device. For example, 902 may be performed by Figure 7 The wireless device 704 in the embodiment may select a base map based on information associated with the wireless device 702 at 714. The information associated with the wireless device 702 may include at least one of: (a) decoding complexity of the wireless device 702, (b) device category of the wireless device 702, (c) capabilities of the wireless device 702, (d) decoder mode of the wireless device 702, (e) receiver complexity of the wireless device 702, (f) receiver mode of the wireless device 702, (g) power consumption of the wireless device 702, (h) power mode of the wireless device 702, or (i) an indication from the wireless device 702. 1002 may also be performed by Fig.14 Medium or Fig.15 Component 198 in is executed.

[0125] At 1006, the first wireless device may obtain CQI reports for multiple basemaps. The basemap may be selected based on the CQI reports. For example, 1006 may be performed by Figure 7 1004 in the wireless device, which may obtain CQI reports for multiple base maps as wireless device configuration parameters 706. A base map may be selected based on the CQI reports at 714. 1006 may also be performed by Fig.14 Medium or Fig.15 Component 198 in is executed.

[0126] At 1008, the first wireless device may output a configuration of the second device to: (a) use a first level of decoding complexity or a first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use a second level of decoding complexity or a second receiver mode when the second device is configured with a second number of frequency bands or CCs less than a threshold. The indication may indicate support for a first capability of a first basemap associated with the first level of decoding complexity or the first receiver mode, and may indicate support for a second capability of a second basemap associated with the second level of decoding complexity or the second receiver mode, wherein the basemap may be selected from a group including the first basemap and the second basemap. For example, 1008 may be performed by Figure 7 1004 is executed in the wireless device 702, which can output a basemap configuration 716 of the wireless device 702 to: (a) use a first level of decoding complexity or a first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use a second level of decoding complexity or a second receiver mode when the second device is configured with a second number of frequency bands or CCs less than a threshold. The indication in the wireless device configuration parameter 706 can indicate support for a first capability of a first basemap associated with the first level of decoding complexity or the first receiver mode. The indication in the wireless device configuration parameter 706 can indicate support for a second capability of a second basemap associated with the second level of decoding complexity or the second receiver mode, wherein the basemap can be selected from a group including the first basemap and the second basemap. 1008 can also be performed by Fig.14 Medium or Fig.15 Component 198 in is executed.

[0127] At 1010, the first wireless device may compare the throughput to a threshold of a reference measurement channel based on a reference sensitivity power level. The reference sensitivity power level for lower complexity decoding may be higher than the reference sensitivity power level for higher complexity decoding. The basemap may be selected based at least on the comparison of the throughput to the threshold. For example, 1010 may be selected by Figure 7 The wireless device 704 in the embodiment may compare the throughput of the Tx RS 710 at 712 with a threshold of the reference measurement channel based on the reference sensitivity power level. The reference sensitivity power level for lower complexity decoding may be higher than the reference sensitivity power level for higher complexity decoding. The base map may be selected at 714 based at least on the comparison of the throughput with the threshold. 1010 may also be performed by Fig.14 Medium or Fig.15 Component 198 in is executed.

[0128] At 1004, the first wireless device may output an LDPC decoded signal to the second device based on the selected base graph. Figure 71004 may be performed by the wireless device 704 in the embodiment, which may output LDPC decoding to the wireless device 702 based on the base graph selected at 714 and send 722. 1004 may also be performed by the wireless device 704 in the embodiment, which may output LDPC decoding to the wireless device 702 based on the base graph selected at 714 and send 722. Fig.14 Medium or Fig.15 Component 198 in is executed.

[0129] Fig.11 1100 is a flowchart of a method of wireless communication. The method may be performed by a second wireless device (e.g., UE 104, UE 350; base station 102, base station 310; wireless device 702, wireless device 704, wireless device 802, wireless device 804; apparatus 1404; network entity 1402, network entity 1502). At 1102, the second wireless device may select a basemap from a plurality of basemaps based on information associated with the second wireless device. The information associated with the second wireless device may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission. For example, 1102 may be performed by Figure 8 The wireless device 802 in the embodiment may select a base map from a plurality of base maps based on information associated with the wireless device 802 at 816. The information associated with the wireless device 802 may include at least one of: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission. 1102 may also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0130] At 1104, the second wireless device may receive an LDPC decoded transmission from the first device based on the selected base graph. For example, 1104 may be performed by Figure 8 1104 may be performed by the wireless device 802 in the embodiment of the present invention, which may receive the LDPC decoded transmission 822 from the wireless device 804 based on the base graph selected at 816. 1104 may also be performed by the wireless device 802 in the embodiment of the present invention, which may receive the LDPC decoded transmission 822 from the wireless device 804 based on the base graph selected at 816. Fig.14 Medium or Fig.15 Component 199 in is executed.

[0131] Fig.121200 is a flowchart of a method of wireless communication. The method may be performed by a second wireless device (e.g., UE 104, UE 350; base station 102, base station 310; wireless device 702, wireless device 704, wireless device 802, wireless device 804; apparatus 1404; network entity 1402, network entity 1502). At 1202, the second wireless device may select a basemap from a plurality of basemaps based on information associated with the second wireless device. The information associated with the second wireless device may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission. For example, 1102 may be performed by Figure 8 The wireless device 802 in the embodiment may select a base map from a plurality of base maps based on information associated with the wireless device 802 at 816. The information associated with the wireless device 802 may include at least one of: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission. 1202 may also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0132] At 1206, the second wireless device may switch a decoder mode or a power mode. For example, 1206 may be performed by Figure 8 1202 in the wireless device 802, the wireless device can switch the decoder mode or power mode to the mode associated with the base map selected at 816. 1206 can also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0133] At 1208, the second wireless device may send the indication. The indication may indicate a basemap preference. A basemap may be selected based at least on the indication. For example, 1208 may be performed by Figure 8 The wireless device 802 in the embodiment may send the indication as a basemap configuration 818. The indication may indicate the basemap preference as the basemap selected in 816. The basemap may be selected at 819 based on the basemap configuration 818. 1208 may also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0134] At 1210, the second wireless device may send CQI reports for multiple basemaps to the first device. The basemap may be selected based on the CQI reports. For example, 1210 may be performed by Figure 8 802 in the wireless device 804, the wireless device may send CQI reports for multiple basemaps as wireless device configuration parameters 806 to the wireless device 804. The basemap may be selected based on the CQI report at 816. 1210 may also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0135] At 1212, the second wireless device may compare the throughput to a threshold of the reference measurement channel based on a reference sensitivity power level. The reference sensitivity power level for lower complexity decoding is higher than the reference sensitivity power level for higher complexity decoding. For example, 1212 may be determined by Figure 8 The wireless device 802 in the embodiment may compare the throughput received as one or more basemap configuration parameters 814 with a threshold value of a reference measurement channel based on the reference sensitivity power level measured at 812. The reference sensitivity power level for lower complexity decoding may be higher than the reference sensitivity power level for higher complexity decoding. 1212 may also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0136] At 1204, the second wireless device may receive an LDPC decoded transmission from the first device based on the selected base graph. Figure 8 The wireless device 802 in the embodiment may receive LDPC decoded transmission 822 from the wireless device 804 based on the base graph selected at 816. 1204 may also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0137] Fig.131300 is a flowchart of a method of wireless communication. The method may be performed by a second wireless device (e.g., UE 104, UE 350; base station 102, base station 310; wireless device 702, wireless device 704, wireless device 802, wireless device 804; apparatus 1404; network entity 1402, network entity 1502). At 1302, the second wireless device may select a basemap from a plurality of basemaps based on information associated with the second wireless device. The information associated with the second wireless device may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission. For example, 1102 may be performed by Figure 8 1302 is performed by the wireless device 802 in the wireless device, and the wireless device can select a base map from a plurality of base maps based on information associated with the wireless device 802 at 816. The information associated with the wireless device 802 may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission. 1302 can also be performed by the wireless device 802 in the wireless device, and the wireless device can select a base map from a plurality of base maps based on information associated with the wireless device 802 at 816. The information associated with the wireless device 802 may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission. Fig.14 Medium or Fig.15 Component 199 in is executed.

[0138] At 1306, the second wireless device may send the indication to the first device. The indication may indicate support for a first capability of a first basemap associated with a first level of decoding complexity or a first receiver mode, and support for a second capability of a second basemap associated with a second level of decoding complexity or a second receiver mode. The plurality of basemaps may include the first basemap and the second basemap. For example, 1306 may be Figure 8 The wireless device 802 in the embodiment may send the indication as a basemap configuration 818 to the wireless device 804. The indication may indicate support for a first capability of a first basemap associated with a first level of decoding complexity or a first receiver mode, and support for a second capability of a second basemap associated with a second level of decoding complexity or a second receiver mode. The plurality of basemaps may include the first basemap and the second basemap. 1306 may also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0139] At 1308, the second wireless device may receive a configuration from the first device to: (a) use a first level of decoding complexity or a first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use a second level of decoding complexity or a second receiver mode when the second device is configured with a second number of frequency bands or CCs less than a threshold. For example, 1308 may be configured by Figure 8 1308 may also be performed by a wireless device 802 in which the wireless device may receive a configuration as one or more basemap configuration parameters 814 from the wireless device 804 to: (a) use a first level of decoding complexity or a first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use a second level of decoding complexity or a second receiver mode when the second device is configured with a second number of frequency bands or CCs less than a threshold. Fig.14 Medium or Fig.15 Component 199 in is executed.

[0140] At 1304, the second wireless device may receive an LDPC decoded transmission from the first device based on the selected base graph. For example, 1304 may be performed by Figure 8 802 in the wireless device 804, which may receive an LDPC decoded transmission 822 from the wireless device 804 based on the base graph selected at 816. 1304 may also be performed by Fig.14 Medium or Fig.15 Component 199 in is executed.

[0141] Fig.141400 is an example of a hardware implementation of an example device 1404. The device 1404 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the device 1404 may include a cellular baseband processor 1424 (also referred to as a modem) coupled to one or more transceivers 1422 (e.g., a cellular RF transceiver). The cellular baseband processor 1424 may include on-chip memory 1424'. In some aspects, the device 1404 may also include one or more subscriber identity module (SIM) cards 1420 and an application processor 1406 coupled to a secure digital (SD) card 1408 and a screen 1410. The application processor 1406 may include on-chip memory 1406'. In some aspects, the device 1404 may also include a Bluetooth module 1412, a WLAN module 1414, an SPS module 1416 (e.g., a GNSS module), one or more sensor modules 1418 (e.g., an atmospheric pressure sensor / altimeter; a motion sensor such as an inertial management unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio-aided detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 1426, a power source 1430, and / or a camera 1432. The Bluetooth module 1412, the WLAN module 1414, and the SPS module 1416 may include an on-chip transceiver (TRx) (or in some cases, only a receiver (Rx)). The Bluetooth module 1412, the WLAN module 1414, and the SPS module 1416 may include their own dedicated antennas and / or communicate using an antenna 1480. The cellular baseband processor 1424 communicates with the UE 104 and / or with the RU associated with the network entity 1402 through the transceiver 1422 via one or more antennas 1480. The cellular baseband processor 1424 and the application processor 1406 may each include a computer-readable medium / memory 1424', 1406', respectively. The additional memory module 1426 may also be considered as a computer-readable medium / memory. Each computer-readable medium / memory 1424', 1406', 1426 may be non-transitory. The cellular baseband processor 1424 and the application processor 1406 are each responsible for general processing, including executing software stored on a computer-readable medium / memory. The software enables the cellular baseband processor 1424 / application processor 1406 to perform the various functions described above when executed by the cellular baseband processor 1424 / application processor 1406. The computer-readable medium / memory can also be used to store data manipulated by the cellular baseband processor 1424 / application processor 1406 when executing the software.The cellular baseband processor 1424 / application processor 1406 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 device 1404 may be a processor chip (modem and / or application) and include only the cellular baseband processor 1424 and / or the application processor 1406, while in another configuration, the device 1404 may be the entire UE (e.g., see. Figure 3 UE 350) and includes additional modules of device 1404.

[0142] As discussed above, component 198 is configured to select a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device class of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device. Component 198 may also be configured to output an LDPC decoded transmission to the second device based on the selected basemap. Component 198 may be within the cellular baseband processor 1424, the application processor 1406, or both the cellular baseband processor 1424 and the application processor 1406. Component 198 may be one or more hardware components specifically configured to perform the stated process / algorithm, implemented by one or more processors configured to perform the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination of the foregoing. As shown, the apparatus 1404 may include various components configured for various functions. In one configuration, the apparatus 1404 (specifically, the cellular baseband processor 1424 and / or the application processor 1406) includes: a component for selecting a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device; A component for outputting LDPC decoding transmission to a second device based on the selected base map; a component for obtaining a CQI report for multiple base maps; a component for the following operations: outputting the configuration of the second device to (a) use a first level of decoding complexity or a first receiver mode when the second device is configured with a first number of bands or CCs greater than a threshold, or (b) use a second level of decoding complexity or a second receiver mode when the second device is configured with a second number of bands or CCs less than a threshold; or a component for comparing the throughput with a threshold of a reference measurement channel based on a reference sensitivity power level. The component can be a component 198 of the device 1404 configured to perform the functions recorded by the component. As described above, the device 1404 may include a Tx processor 368, an Rx processor 356, and a controller / processor 359. Therefore, in one configuration, the component can be a Tx processor 368, an Rx processor 356, and a controller / processor 359 configured to perform the functions recorded by the component.

[0143] As discussed above, component 199 may be configured to select a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device class of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of CC, or (k) second bandwidth of transmission. Component 199 may also be configured to receive LDPC decoded transmission from the first device based on the selected basemap. Component 199 may be within one or more processors of one or more of CU 1510, DU 1530, and RU 1540. Component 199 may be one or more hardware components specifically configured to perform the stated process / algorithm, implemented by one or more processors configured to perform the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination of the above. The network entity 1502 may include a variety of components configured for various functions. In one configuration, the network entity 1502 includes: a component for selecting a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission; a component for receiving an LDPC decoded transmission from the first device based on the selected basemap; and Components for sending the indication; components for switching decoder modes or power modes; components for sending CQI reports for multiple basemaps to the first device; components for sending the indication to the first device; components for the following operations: receiving a configuration from the first device to (a) use a first level of decoding complexity or a first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use a second level of decoding complexity or a second receiver mode when the second device is configured with a second number of frequency bands or CCs less than a threshold; or components for comparing the throughput with a threshold of a reference measurement channel based on a reference sensitivity power level. The component can be a component 199 of the device 1404 configured to perform the functions recited by the component. As described above, the device 1404 may include a Tx processor 368, an Rx processor 356, and a controller / processor 359. Therefore, in one configuration, the component can be a Tx processor 368, an Rx processor 356, and a controller / processor 359 configured to perform the functions recited by the component.

[0144] Fig.15 1500 is a diagram illustrating an example of a hardware implementation for a network entity 1502. The network entity 1502 may be a BS, a component of a BS, or may implement BS functionality. The network entity 1502 may include at least one of a CU 1510, a DU 1530, or a RU 1540. For example, depending on the layer functionality handled by the component 199, the network entity 1502 may include a CU 1510; both a CU 1510 and a DU 1530; each of the CU 1510, the DU 1530, and the RU 1540; the DU 1530; both a DU 1530 and a RU 1540; or the RU 1540. The CU 1510 may include a CU processor 1512. The CU processor 1512 may include an on-chip memory 1512'. In some aspects, the CU 1510 may also include an additional memory module 1514 and a communication interface 1518. CU 1510 communicates with DU 1530 via a midhaul link, such as an F1 interface. DU 1530 may include a DU processor 1532. DU processor 1532 may include on-chip memory 1532'. In some aspects, DU 1530 may also include an additional memory module 1534 and a communication interface 1538. DU 1530 communicates with RU 1540 via a fronthaul link. RU 1540 may include a RU processor 1542. RU processor 1542 may include on-chip memory 1542'. In some aspects, RU 1540 may also include an additional memory module 1544, one or more transceivers 1546, an antenna 1580, and a communication interface 1548. RU 1540 communicates with UE 104. On-chip memory 1512', 1532', 1542' and additional memory modules 1514, 1534, 1544 may each be considered a computer-readable medium / memory. Each computer readable medium / memory may be non-transitory. Each of processors 1512, 1532, 1542 is responsible for general processing, including executing software stored on the computer readable medium / memory. The software, when executed by the corresponding processor, causes the processor to perform the various functions described above. The computer readable medium / memory can also be used to store data manipulated by the processor when executing the software.

[0145] As discussed above, component 198 is configured to select a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device class of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device. Component 198 may also be configured to output an LDPC decoded transmission to the second device based on the selected basemap. Component 198 may be within the cellular baseband processor 1424, the application processor 1406, or both the cellular baseband processor 1424 and the application processor 1406. Component 198 may be one or more hardware components specifically configured to perform the stated process / algorithm, implemented by one or more processors configured to perform the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination of the foregoing. As shown, the apparatus 1404 may include various components configured for various functions. In one configuration, the apparatus 1404 (specifically, the cellular baseband processor 1424 and / or the application processor 1406) includes: a component for selecting a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device category of the second device, (c) capabilities of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device; A component for outputting an LDPC decoded transmission to a second device based on a selected base map; a component for obtaining a CQI report for multiple base maps; a component for the following operations: outputting a configuration of the second device to (a) use a first level of decoding complexity or a first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use a second level of decoding complexity or a second receiver mode when the second device is configured with a second number of frequency bands or CCs less than a threshold; or a component for comparing the throughput with a threshold of a reference measurement channel based on a reference sensitivity power level. The component can be a component 198 of the network entity 1502 configured to perform the functions recorded by the component. As described above, the network entity 1502 may include a Tx processor 316, an Rx processor 370, and a controller / processor 375. Therefore, in one configuration, the component can be a Tx processor 316, an Rx processor 370, and a controller / processor 375 configured to perform the functions recorded by the component.

[0146] As discussed above, component 199 may be configured to select a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device class of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of CC, or (k) second bandwidth of transmission. Component 199 may also be configured to receive LDPC decoded transmission from the first device based on the selected basemap. Component 199 may be within one or more processors of one or more of CU 1510, DU 1530, and RU 1540. Component 199 may be one or more hardware components specifically configured to perform the stated process / algorithm, implemented by one or more processors configured to perform the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination of the above. The network entity 1502 may include a variety of components configured for various functions. In one configuration, the network entity 1502 includes: a component for selecting a basemap from a plurality of basemaps based on one or more of: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, (i) indication from the second device, (j) first bandwidth of the CC, or (k) second bandwidth of the transmission; a component for receiving an LDPC decoded transmission from the first device based on the selected basemap; and Components for sending the indication; components for switching decoder modes or power modes; components for sending CQI reports for multiple basemaps to the first device; components for sending the indication to the first device; components for the following operations: receiving a configuration from the first device to (a) use a first level of decoding complexity or a first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use a second level of decoding complexity or a second receiver mode when the second device is configured with a second number of frequency bands or CCs less than a threshold; or components for comparing the throughput with a threshold of a reference measurement channel based on a reference sensitivity power level. The components may be components 199 of the network entity 1502 configured to perform the functions recited by the components. As described above, the network entity 1502 may include a Tx processor 316, an Rx processor 370, and a controller / processor 375.Thus, in one configuration, the components may be the Tx processor 316, the Rx processor 370, and the controller / processor 375 configured to perform the functions recited by the components.

[0147] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is only an illustration of the exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged based on design preferences. In addition, some blocks can be combined or omitted. The attached method claims provide the elements of each block in a sample order, but are not limited to the specific order or hierarchy provided.

[0148] The foregoing 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 apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not limited to the various aspects described herein, but should be given the full scope consistent with the language claims. Unless otherwise specified, reference to an element in the singular form does not mean "one and only one", but "one or more". Terms such as "if", "when ..." and "at ..." do not mean a direct temporal relationship or reaction. That is, these phrases, such as "when ...", do not mean an instant action in response to the occurrence of an action or during the occurrence of an action, but only mean that if the condition is met, the action will occur without a specific or instantaneous time constraint to cause the action to occur. The word "exemplary" is used herein to mean "used as an example, instance, or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or having an advantage over other aspects. Unless otherwise specified, the term "some" refers to one or more. 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 multiple A, multiple B, or multiple C. Specifically, 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" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may contain one or more members of A, B, or C. A set should be interpreted as a set of elements, where the number of elements is one or more. Thus, for a set of X, X will include one or more elements. If the first device receives data from the second device or sends data to the second device, data may be directly received / sent between the first device and the second device, or indirectly received / sent between the first device and the second device through a collection of devices. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or will later be known to a person of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims. Words such as "module", "mechanism", "element", "device", etc. cannot replace the word "component". Therefore, no claim element will be understood as a component plus function unless the element is explicitly stated using the phrase "component for..."

[0149] As used herein, the phrase "based on" should not be interpreted as referring to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, conditions, factors, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0150] A device configured to "output" data (such as, transmit, signal or message) may, for example, transmit the data with a transceiver, or may transmit the data to a device that transmits the data. A device configured to "obtain" data (such as, transmit, signal or message) may, for example, receive the data with a transceiver, or may obtain the data from a device that receives the data.

[0151] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0152] Aspect 1 is a method for wireless communication at a first device, wherein the method may include: selecting a basemap from a plurality of basemaps based on information associated with a second device. The method may also include: outputting an LDPC decoded signal to the second device based on the selected basemap.

[0153] Aspect 2 is a method according to aspect 1, wherein the base map can be selected based on the decoding complexity of the second device. The decoding complexity of the second device may include one or more of the following: (a) the number of code blocks per transport block, (b) MCS, (c) modulation order, (d) the number of layers used for transmission, (e) the communication direction is uplink, downlink or sidelink, (f) limited buffer rate matching is enabled for the transport block, (g) the maximum number of MIMO layers configured on the CC, (h) the highest modulation order configured in the CC, (i) the first bandwidth of the CC, or (j) the second bandwidth of the transmission.

[0154] Aspect 3 is a method according to Aspect 2, wherein the base map can be selected based on one or more of the following: (a) the number of code blocks per transport block, (b) the MCS, (c) the modulation order, (d) the number of layers used for the transmission, (e) the transport block size, (f) the first bandwidth of the CC, or (g) the second bandwidth of the transmission is higher than a threshold.

[0155] Aspect 4 is a method according to any one of aspects 1 to 3, wherein the indication may indicate a basemap preference. The basemap may be selected based at least on the indication from the second device.

[0156] Aspect 5 is a method according to any one of aspects 1 to 4, wherein the indication may indicate decoder information associated with the second device. The base map may be selected based at least on the indication from the second device.

[0157] Aspect 6 is a method according to aspect 5, wherein the decoder information may indicate at least one of the following: (a) the decoder mode of the second device, (b) the power mode of the second device, (c) the amount of decoder iterations at the second device, or (d) the number of bits used for LLR quantization at the second device.

[0158] Aspect 7 is a method according to any one of aspects 1 to 6, wherein the method may further include: obtaining CQI reports for a plurality of base pictures. The base picture may be selected based on the CQI reports.

[0159] Aspect 8 is a method according to any one of aspects 1 to 7, wherein the indication may indicate support for a first capability of a first base picture associated with a first level of the decoding complexity or a first receiver mode. The indication may indicate support for a second capability of a second base picture associated with a second level of the decoding complexity or a second receiver mode. The base picture may be selected from the group consisting of the first base picture and the second base picture.

[0160] Aspect 9 is a method according to any one of Aspects 1 to 8, wherein the method may further include: outputting the configuration of the second device to: (a) use the first level of decoding complexity or the first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use the second level of decoding complexity or the second receiver mode when the second device is configured with a second number of frequency bands or CCs less than the threshold.

[0161] Aspect 10 is a method according to any one of aspects 1 to 9, wherein the method may further include: comparing the throughput with a threshold of a reference measurement channel based on a reference sensitivity power level. The reference sensitivity power level for lower complexity decoding may be higher than the reference sensitivity power level for higher complexity decoding. The base map may be selected based at least on a result of comparing the throughput with the threshold.

[0162] Aspect 11 is a method according to any one of aspects 1 to 10, wherein the plurality of base graphs may include at least a first base graph and a second base graph. The first base graph may have one or more of the following: (a) higher performance than the second base graph when the number of iterations is lower than a first threshold, (b) higher performance than the second base graph when the number of iterations is lower than the first threshold, and lower performance than the second base graph when the number of iterations is higher than a second threshold, (c) when decoding is performed using a reduced number of iterations or a reduced number of quantization bits, a first code instance generated based on the first base graph has a higher performance level than a second code instance generated based on the second base graph, or (d) supports a higher maximum decoding rate or a higher minimum decoding rate than the second base graph.

[0163] Aspect 12 is a method according to any one of Aspects 1 to 11, wherein at least one of the following situations exists: (a) the first device includes a network entity and the second device includes a UE, (b) the first device includes a first UE and the second device includes a second UE, or (c) the first device includes the UE and the second device includes the network entity.

[0164] Aspect 13 is a method of wireless communication at a second device, wherein the method may include: selecting a basemap from a plurality of basemaps based on information associated with the second device. The method may also include: receiving an LDPC decoded transmission from a first device based on the selected basemap.

[0165] Aspect 14 is a method according to aspect 13, wherein the base map can be selected based on the decoding complexity of the second device. The decoding complexity of the second device may include one or more of the following: (a) the number of code blocks per transport block, (b) MCS, (c) modulation order, (d) the number of layers used for transmission, (e) the communication direction is uplink, downlink or sidelink, (f) limited buffer rate matching is enabled for the transport block, (g) the maximum number of MIMO layers configured on the CC, (h) the highest modulation order configured in the CC, (i) the first bandwidth of the CC, or (j) the second bandwidth of the transmission.

[0166] Aspect 15 is a method according to Aspect 14, wherein the base map can be selected based on one or more of the following: (a) the number of code blocks per transport block, (b) the MCS, (c) the modulation order, (d) the transport block size, (e) the first bandwidth of the CC, (f) the second bandwidth of the transmission, or (g) the number of layers used for the transmission is higher than a threshold.

[0167] Aspect 16 is a method according to any one of aspects 13 to 15, wherein the method may further include: sending an indication. The indication may indicate a basemap preference. The basemap may be selected based at least on the indication.

[0168] Aspect 17 is a method according to any one of aspects 13 to 16, wherein the method may further include: switching a decoder mode or a power mode. The method may further include: sending the indication. The indication may indicate decoder information associated with the second device. The base map may be selected based at least on the indication.

[0169] Aspect 18 is a method according to Aspect 17, wherein the decoder information may indicate at least one of the following: (a) the decoder mode of the second device, (b) the power mode of the second device, (c) the amount of decoder iterations at the second device, or (d) the number of bits used for LLR quantization at the second device.

[0170] Aspect 19 is a method according to any one of aspects 13 to 18, wherein the method may further include: sending CQI reports for multiple base pictures to the first device. The base picture may be selected based on the CQI reports.

[0171] Aspect 20 is a method according to any one of aspects 13 to 19, wherein the method may further include: sending the indication to the first device. The indication may indicate support for a first capability of a first base map associated with a first level of the decoding complexity or a first receiver mode, and support for a second capability of a second base map associated with a second level of the decoding complexity or a second receiver mode. The plurality of base maps may include the first base map and the second base map.

[0172] Aspect 21 is a method according to Aspect 20, wherein the method may further include: receiving a configuration from the first device to: (a) use the first level of decoding complexity or the first receiver mode when the second device is configured with a first number of frequency bands or CCs greater than a threshold, or (b) use the second level of decoding complexity or the second receiver mode when the second device is configured with a second number of frequency bands or CCs less than the threshold.

[0173] Aspect 22 is a method according to any one of aspects 13 to 21, wherein the method may further include: comparing the throughput with a threshold of a reference measurement channel based on a reference sensitivity power level. The reference sensitivity power level for lower complexity decoding may be higher than the reference sensitivity power level for higher complexity decoding.

[0174] Aspect 23 is a method according to any one of aspects 13 to 22, wherein the plurality of base graphs may include at least a first base graph and a second base graph. The first base graph may have one or more of the following: (a) higher performance than the second base graph when the number of iterations is lower than a first threshold, (b) higher performance than the second base graph when the number of iterations is lower than the first threshold, and lower performance than the second base graph when the number of iterations is higher than a second threshold, (c) when decoding is performed using a reduced number of iterations or a reduced number of quantization bits, a first code instance generated based on the first base graph has a higher performance level than a second code instance generated based on the second base graph, or (d) supports a higher maximum decoding rate or a higher minimum decoding rate than the second base graph.

[0175] Aspect 24 is a method according to any one of Aspects 13 to 23, wherein at least one of the following situations exists: (a) the first device includes a network entity and the second device includes a UE, (b) the first device includes a first UE and the second device includes a second UE, or (c) the first device includes the UE and the second device includes the network entity.

[0176] Aspect 25 is a method according to any one of Aspects 1 to 14, wherein the information associated with the second device may include at least one of the following: (a) decoding complexity of the second device, (b) device category of the second device, (c) capability of the second device, (d) decoder mode of the second device, (e) receiver complexity of the second device, (f) receiver mode of the second device, (g) power consumption of the second device, (h) power mode of the second device, or (i) an indication from the second device.

[0177] Aspect 26 is an apparatus for wireless communication, the apparatus comprising: a memory; and at least one processor, the at least one processor being coupled to the memory and being configured to implement any one of Aspects 1 to 25 based at least in part on information stored in the memory.

[0178] Aspect 27 is the apparatus of aspect 26, further comprising at least one of an antenna or a transceiver coupled to the at least one processor.

[0179] Aspect 28 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 1 to 25.

[0180] Aspect 29 is a computer-readable medium (eg, non-transitory computer-readable medium) storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 1 to 25.

Claims

1. An apparatus for wireless communication at a first device, the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: selecting a base map from a plurality of base maps based on information associated with the second device; and A low density parity check (LDPC) decoded signal is output based on the selected base graph and sent to the second device.

2. The apparatus of claim 1 , wherein the base graph is selected based on a decoding complexity of the second device, the decoding complexity comprising one or more of: The number of code blocks per transport block, Modulation and Coding Scheme (MCS), Modulation order, The number of layers to send, The communication direction is uplink, downlink or sidelink, Limited buffer rate matching is enabled for transport blocks. The maximum number of multiple-input (MIMO) layers configured on a component carrier (CC), the highest modulation order configured in the CC, a first bandwidth of the CC, or The second bandwidth of the transmission.

3. The apparatus of claim 2, wherein the basemap is selected based on one or more of: the number of code blocks per transport block, the MCS, the modulation order, the number of layers used for the transmission, a transport block size, the first bandwidth of the CC, or the second bandwidth of the transmission being above a threshold. 4 . The apparatus of claim 1 , wherein the associated indication from the second device indicates a basemap preference, and wherein the basemap is selected based at least on the indication from the second device.

5. The apparatus of claim 1, wherein the associated indication from the second device indicates decoder information associated with the second device, and wherein the base map is selected based at least on the indication from the second device.

6. The device of claim 5, wherein the decoder information indicates at least one of: a decoder mode of the second device, a power mode of the second device, the amount of decoder iterations at the second device, or A number of bits for log-likelihood ratio (LLR) quantization at the second device.

7. The apparatus of claim 1 , further comprising a transceiver coupled to the at least one processor, wherein the at least one processor is further configured to: A channel quality indicator (CQI) report is obtained, via the transceiver, for a plurality of base pictures, wherein the base picture is selected based on the CQI report.

8. An apparatus according to claim 1, wherein the indication from the second device indicates support for a first capability of a first base map associated with a first level of decoding complexity or a first receiver mode of the second device, and indicates support for a second capability of a second base map associated with a second level of decoding complexity or a second receiver mode, and wherein the base map is selected from a group including the first base map and the second base map.

9. The apparatus of claim 8, wherein the at least one processor is further configured to: Output the configuration of the second device to: using the first level of decoding complexity or the first receiver mode when the second device is configured with a first number of frequency bands or component carriers (CCs) greater than a threshold, or The second level of decoding complexity or the second receiver mode is used when the second device is configured with a second number of frequency bands or CCs that is less than the threshold.

10. The apparatus of claim 1, wherein the at least one processor is further configured to: The throughput is compared to a threshold of a reference measurement channel based on a reference sensitivity power level, wherein the reference sensitivity power level for lower complexity decoding is higher than the reference sensitivity power level for higher complexity decoding, and wherein the base map is selected based at least on a result of comparing the throughput to the threshold.

11. The apparatus according to claim 1, wherein the plurality of base graphs comprises at least a first base graph and a second base graph, the first base graph having one or more of the following: When the number of iterations is below a first threshold, the performance is higher than that of the second base graph, a higher performance than the second base graph when the number of iterations is below the first threshold, and a lower performance than the second base graph when the number of iterations is above a second threshold, a first code instance generated based on the first base graph has a higher performance level than a second code instance generated based on the second base graph when decoding using a reduced number of iterations or a reduced number of quantization bits, or Supporting a higher maximum coding rate or a higher minimum coding rate than the second base picture.

12. The apparatus of claim 1, wherein at least one of the following conditions exists: The first device comprises a network entity and the second device comprises a user equipment (UE), The first device comprises a first UE and the second device comprises a second UE, or The first device includes the UE and the second device includes the network entity.

13. The apparatus of claim 1, wherein the information associated with the second device comprises at least one of: the decoding complexity of the second device, a device category of the second device, the capability of the second device, a decoder mode of the second device, the receiver complexity of the second device, a receiver mode of the second device, the power consumption of the second device, the power mode of the second device, or An instruction from the second device.

14. An apparatus for wireless communication at a second device, the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: selecting a base map from a plurality of base maps based on information associated with the second device; and A low density parity check (LDPC) decoded transmission is received from the first device based on the selected base graph.

15. The apparatus of claim 14, wherein the base graph is selected based on a decoding complexity of the second device, the decoding complexity comprising one or more of: The number of code blocks per transport block, Modulation and Coding Scheme (MCS), Modulation order, The number of layers to send, The communication direction is uplink, downlink or sidelink, Limited buffer rate matching is enabled for transport blocks. The maximum number of multiple-input (MIMO) layers configured on a component carrier (CC), or The highest modulation order configured in the CC.

16. The apparatus of claim 15, wherein the basemap is selected based on one or more of: the number of code blocks per transport block, the MCS, the modulation order, a transport block size, a first bandwidth of the CC, a second bandwidth of the transmission, or the number of layers used for the transmission being above a threshold.

17. The apparatus of claim 14, further comprising a transceiver coupled to the at least one processor, wherein the at least one processor is further configured to: An indication of the second device is transmitted using the transceiver, wherein the indication indicates a basemap preference, and wherein the basemap is selected based at least on the indication.

18. The apparatus of claim 14, wherein the at least one processor is further configured to: switching a decoder mode of the second device or a power mode of the second device; and An indication of the second device is sent, wherein the indication indicates decoder information associated with the second device, and wherein the base map is selected based at least on the indication.

19. The device of claim 18, wherein the decoder information indicates at least one of: said decoder mode of said second device, said power mode of said second device, the amount of decoder iterations at the second device, or A number of bits for log-likelihood ratio (LLR) quantization at the second device.

20. The apparatus of claim 14, wherein the at least one processor is further configured to: Channel quality indicator (CQI) reports for a plurality of base pictures are sent to the first device, wherein the base picture is selected based on the CQI reports.

21. The apparatus of claim 14, wherein the at least one processor is further configured to: An indication of the second device is sent to the first device, wherein the indication indicates support for a first capability of a first base map associated with a first level of decoding complexity or a first receiver mode at the second device, and support for a second capability of a second base map associated with a second level of the decoding complexity or a second receiver mode, and wherein the plurality of base maps includes the first base map and the second base map.

22. The apparatus of claim 21, wherein the at least one processor is further configured to: Receive a configuration from the first device to: using the first level of decoding complexity or the first receiver mode when the second device is configured with a first number of frequency bands or component carriers (CCs) greater than a threshold, or The second level of decoding complexity or the second receiver mode is used when the second device is configured with a second number of frequency bands or CCs that is less than the threshold.

23. The apparatus of claim 14, wherein the at least one processor is further configured to: The throughput is compared to a threshold of a reference measurement channel based on a reference sensitivity power level, wherein the reference sensitivity power level for lower complexity decoding is higher than the reference sensitivity power level for higher complexity decoding.

24. The apparatus according to claim 14, wherein the plurality of base graphs comprises at least a first base graph and a second base graph, the first base graph having one or more of the following: When the number of iterations is below a first threshold, the performance is higher than that of the second base graph, a higher performance than the second base graph when the number of iterations is below the first threshold, and a lower performance than the second base graph when the number of iterations is above a second threshold, a first code instance generated based on the first base graph has a higher performance level than a second code instance generated based on the second base graph when decoding using a reduced number of iterations or a reduced number of quantization bits, or Supporting a higher maximum coding rate or a higher minimum coding rate than the second base picture.

25. The apparatus of claim 14, wherein at least one of the following conditions exists: The first device comprises a network entity and the second device comprises a user equipment (UE), The first device comprises a first UE and the second device comprises a second UE, or The first device includes the UE and the second device includes the network entity.

26. The apparatus of claim 14, wherein the information associated with the second device comprises at least one of: a decoding complexity at the second device, a device category of the second device, the capability of the second device, a decoder mode of the second device, the receiver complexity of the second device, a receiver mode of the second device, the power consumption of the second device, a power mode of the second device, an indication of the second device, a first bandwidth of a component carrier (CC), or The second bandwidth for sending.

27. A method of wireless communication at a first device, the method comprising: selecting a base map from a plurality of base maps based on information associated with the second device; as well as A low density parity check (LDPC) decoded signal is output based on the selected base graph and sent to the second device.

28. The method according to claim 27, further comprising: The throughput is compared to a threshold of a reference measurement channel based on a reference sensitivity power level, wherein the reference sensitivity power level for lower complexity decoding is higher than the reference sensitivity power level for higher complexity decoding, wherein the base map is selected based at least on a result of comparing the throughput to the threshold.

29. A method of wireless communication at a second device, the method comprising: selecting a base map from a plurality of base maps based on information associated with the second device; as well as A low density parity check (LDPC) decoded transmission is received from the first device based on the selected base graph.

30. The method according to claim 29, further comprising: Receive a configuration from the first device to: When the second device is configured with a first number of frequency bands or component carriers (CCs) greater than a threshold, using a first level of decoding complexity or a first receiver mode, or When the second device is configured with a second number of frequency bands or CCs less than the threshold, the second level of decoding complexity or a second receiver mode is used.

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