Support of data transmission with more than 8 layers
The proposed layer mapping schemes for 6G wireless systems address the challenge of data transmission beyond 8 layers by optimizing codeword-to-layer mapping and HARQ-ACK mechanisms, enhancing data transmission efficiency and meeting 6G mobile broadband requirements.
Patent Information
- Application Number
- PCT/CN2025/086720
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-05
AI Technical Summary
Existing wireless communication systems struggle to support data transmission with more than 8 layers, particularly in the context of 6G mobile broadband services, due to the lack of specified layer mapping schemes for multiple codewords and varying UE antenna configurations.
The proposed solution involves layer mapping schemes for data transmission with more than 8 layers, specifically designed for 6G systems, which include mapping codewords to layers based on different UE capabilities and channel conditions, using up to 4 codewords and 16 layers, with flexible layer-to-codeword splits and enhanced HARQ-ACK mechanisms.
This approach enables efficient data transmission with more than 8 layers, supporting peak data rates required for 6G mobile broadband services, even in challenging channel conditions, by ensuring correct decoding and resource allocation across multiple TRPs.
Smart Images

Figure CN2025086720_05032026_PF_FP_ABST
Abstract
Description
SUPPORT OF DATA TRANSMISSION WITH MORE THAN 8 LAYERSTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to a user equipment (UE) , a network entity, a processor for wireless communication, methods, and computer readable media for supporting data transmission with more than 8 layers.BACKGROUND
[0002] A wireless communications system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .SUMMARY
[0003] The present disclosure relates to a user equipment (UE) , a network entity, a processor for wireless communication, methods, and computer readable media for supporting data transmission with more than 8 layers.
[0004] In a first aspect, there is provided a UE. The UE comprises: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: receive, from a network entity, a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and determine layer mapping of the one or more codewords to the layers.
[0005] In a second aspect, there is provided a network entity. The network entity comprises: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: transmit, to a user equipment (UE) , a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and determine layer mapping of the one or more codewords to the layers.
[0006] In a third aspect, there is provided a processor for wireless communication. The processor comprises: at least one memory; and a controller coupled with the at least one memory and configured to cause the controller to: receive, from a network entity, a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and determine layer mapping of the one or more codewords to the layers.
[0007] In a fourth aspect, there is provided a method performed by a user equipment (UE) , the method comprising: receiving, from a network entity, a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and determining layer mapping of the one or more codewords to the layers.
[0008] In an fifth aspect, there is provided a method performed by a network entity, the method comprising: transmitting, to a user equipment (UE) , a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and determining layer mapping of the one or more codewords to the layers.
[0009] In a sixth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed by a processor of an apparatus, causing the apparatus to perform the method according to the fourth or the fifth aspect of the disclosure.
[0010] In some implementations of the methods, the UE and the network entity described herein, up to 2 codewords and up to 16 layers are scheduled. In case of 9 layers being scheduled, the UE and / or the network entity may determine that a first codeword has 4 layers and a second codeword has 5 layers. In case of 10 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 5 layers and the second codeword has 5 layers. In case of 11 layers being scheduled, the UE may determine that the first codeword has 5 layers and the second codeword has 5 layers. In case of 12 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 6 layers and the second codeword has 6 layers. In case of 13 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 6 layers and the second codeword has 7 layers. In case of 14 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 7 layers and the second codeword has 7 layers. Iin case of 15 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 7 layers and the second codeword has 8 layers. In case of 16 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 8 layers and the second codeword has 8 layers.
[0011] In some implementations of the methods, the UE and the network entity described herein, more than 2 codewords and up to 16 layers are scheduled, and wherein each codeword is mapped to no more than 4 layers.
[0012] In some implementations of the methods, the UE and the network entity described herein, in case of 9 layers being scheduled, the UE and / or the network entity may determine that a first codeword has 3 layers, a second codeword has 3 layers, and a third codeword has 3 layers. In case of 10 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 3 layers, the second codeword has 3 layers, and the third codeword has 4 layers. In case of 11 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 3 layers, the second codeword has 4 layers, and the third codeword has 4 layers. In case of 12 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 4 layers, the second codeword has 4 layers, and the third codeword has 4 layers. In case of 13 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 3 layers, the second codeword has 3 layers, the third codeword has 3 layers, and the fourth codeword has 4 layers. In case of 14 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 3 layers, the second codeword has 3 layers, the third codeword has 4 layers, and the fourth codeword has 4 layers. In case of 15 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 3 layers, the second codeword has 4 layers, the third codeword has 4 layers, and the fourth codeword has 4 layers. In case of 16 layers being scheduled, the UE and / or the network entity may determine that the first codeword has 4 layers, the second codeword has 4 layers, the third codeword has 4 layers, and the fourth codeword has 4 layers.
[0013] In some implementations of the methods, the UE and the network entity described herein, the maximum number of codewords scheduled by downlink control information (DCI) for the PDSCH is configured as 3, and the scheduling signaling indicates three modulation coding scheme (MCS) , new data indicator (NDI) and redundancy version (RV) fields.
[0014] In some implementations of the methods, the UE and the network entity described herein, in case of three transport blocks (TBs) enabled by the scheduling signaling, the UE and / or the network entity may determine that a first TB, a second TB, and a third TB are mapped to a first codeword, a second codeword, and a third codeword, respectively; in case of two TBs enabled by the scheduling signaling, the UE and / or the network entity may determine that the first TB and the second TB are mapped to the first codeword and the second codeword, respectively; or in case of one TB enabled by the scheduling signaling, the UE and / or the network entity may determine that the first TB is mapped to the first codeword.
[0015] In some implementations of the methods, the UE and the network entity described herein, the maximum number of codewords scheduled by DCI for the PDSCH is configured as 4, and the scheduling signaling indicates four MCS, NDI and RV fields.
[0016] In some implementations of the methods, the UE and the network entity described herein, in case of four TBs enabled by the scheduling signaling, the UE and / or the network entity may determine that a first TB, a second TB, a third TB and a fourth TB are mapped to a first codeword, a second codeword, a third codeword, and a fourth codeword, respectively; in case of three TBs enabled by the scheduling signaling, the UE and / or the network entity may determine that the first TB, the second TB, and the third TB are mapped to the first codeword, the second codeword and the third codeword, respectively; or in case of two TBs enabled by the scheduling signaling, the UE and / or the network entity may determine that the first TB and the second TB are mapped to the first codeword and the second codeword, respectively; or in case of one TB enabled by the scheduling signaling, the UE and / or the network entity may determine that the first TB is mapped to the first codeword.
[0017] In some implementations of the methods, the UE and the network entity described herein, the UE may generate hybrid automatic repeat request-acknowledgement (HARQ-ACK) information corresponding to the one or more codewords of the scheduled PDSCH.
[0018] In some implementations of the methods, the UE and the network entity described herein, the maximum number of codewords scheduled by DCI for the PDSCH is configured as 3, and wherein HARQ-ACK spatial bundling is configured, and to generate the HARQ-ACK information corresponding to more than two codewords of the scheduled PDSCH, the UE may generate a first HARQ-ACK bit based on a binary AND operation of HARQ-ACK information bits corresponding to a first and a second TBs, and a second HARQ-ACK bit based on a HARQ-ACK information bit corresponding to a third TB.
[0019] In some implementations of the methods, the UE and the network entity described herein, the PDSCH includes one TB, the first HARQ-ACK bit being associated with the first TB, and the UE may generate an ACK for the second TB and a NACK for the third TB.
[0020] In some implementations of the methods, the UE and the network entity described herein, the PDSCH includes two TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the UE may generate a NACK for the third TB.
[0021] In some implementations of the methods, the UE and the network entity described herein, the PDSCH includes three TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the second HARQ-ACK bit being associated with the third TB.
[0022] In some implementations of the methods, the UE and the network entity described herein, the maximum number of codewords scheduled by DCI for the PDSCH is configured as 4, and wherein HARQ-ACK spatial bundling is configured, and the UE may generate a first HARQ-ACK bit based on a binary AND operation of HARQ-ACK information bits corresponding to a first and a second TBs, and a second HARQ-ACK bit based on the binary AND operation of HARQ-ACK information bits corresponding to a third and a fourth TBs.
[0023] In some implementations of the methods, the UE and the network entity described herein, the PDSCH includes one TB, the first HARQ-ACK bit being associated with the first TB, and the UE may further generate an ACK for the second TB and NACKs for the third and fourth TBs.
[0024] In some implementations of the methods, the UE and the network entity described herein, the PDSCH includes two TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the UE may further generate NACKs for the third and fourth TBs.
[0025] In some implementations of the methods, the UE and the network entity described herein, the PDSCH includes three TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the second HARQ-ACK bit being associated with the third TB, and the UE may further generate an ACK for the fourth TB.
[0026] In some implementations of the methods, the UE and the network entity described herein, the PDSCH includes four TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the second HARQ-ACK bit being associated with the third and the fourth TBs.BRIEF DESCRIPTION OF THE DRAWINGS
[0027] FIG. 1 illustrates an example of a wireless communications system in which some embodiments of the present disclosure can be implemented.
[0028] FIG. 2 illustrates a process flow for supporting data transmission with more than 8 layers in accordance with some example embodiments of the present disclosure.
[0029] FIG. 3 illustrates an example of a device that is suitable for implementing some embodiments of the present disclosure.
[0030] FIG. 4 illustrates an example of a processor that is suitable for implementing some embodiments of the present disclosure.
[0031] FIG. 5 illustrates a flowchart of a method that performed by a UE in accordance with aspects of the present disclosure.
[0032] FIG. 6 illustrates a flowchart of a method that performed by a network entity in accordance with aspects of the present disclosure.
[0033] Throughout the drawings, the same or similar reference numerals represent the same or similar elements.DETAILED DESCRIPTION
[0034] Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below. In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0035] References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0036] It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms. In some examples, values, procedures, or apparatuses are referred to as “best, ” “lowest, ” “highest, ” “minimum, ” “maximum, ” or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0037] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments. As used herein, the singular forms “a, ” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises, ” “comprising, ” “has, ” “having, ” “includes” and / or “including, ” when used herein, specify the presence of stated features, elements, components and / or the like, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. For example, the term “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term “based on” is to be read as “based at least in part on. ” The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The use of an expression such as “A and / or B” can mean either “only A” or “only B” or “both A and B. ” Other definitions, explicit and implicit, may be included below.
[0038] For spatial multiplexing and transmit diversity, layer mapping is one of the important components for physical uplink shared channel (PUSCH) or physical downlink shared channel (PDSCH) transmission with more than one data layers. Further, when more than one codewords (CWs) are scheduled with more than one layers are scheduled for a PDSCH or a PUSCH, the 3GPP standards should specify the layer mapping schemes to tell the UE how to map the data of a codeword to one or more layers for PUSCH transmission or how to de-map the data of different layers to a codeword for PDSCH decode. Up to 8 layers and up to 2 codewords are supported in 4G LTE and 5G NR, but different layer mapping schemes are specified for 4G LTE and 5G NR, respectively. Customer premises equipment (CPE) is an important device in 6G for fixed wireless access service and more RX and / or TX antenna ports, e.g., 10, 12, or 16, may be equipped for such devices. On the other hand, to meet the peak data rate requirement of 6G mobile broadband (MBB) service, more than 8 layers data transmission is affirmatively chosen for single-user transmission.
[0039] Embodiments of the present disclosure target the layer mapping schemes for 6G, including the layer mapping schemes for more than 8 layers transmission and the corresponding impacts for the case that more than two codewords are scheduled.
[0040] Aspects of the present disclosure are described in the context of a wireless communications system. FIG. 1 illustrates an example of a wireless communications system 100 in which some embodiments of the present disclosure can be implemented. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment (NE) ) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0041] The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signalling, transmit signalling) over a Uu interface. In a 3GPP non-terrestrial network (NTN) , a network entity 102 in form of a satellite can directly communicate to UE 104 using NR / LTE Uu interface. The satellite may be a transparent satellite or a regenerative satellite. For NTN with a transparent satellite, a base station on earth may communicate with a UE via the satellite. For NTN with a regenerative satellite, the base station may be on board and directly communicate with the UE.
[0042] A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0043] The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.
[0044] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.
[0045] A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0046] A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) . As used herein, the term “TRP” refers to a transmission-reception point having an antenna array (with one or more antenna elements) at the network side located at a specific geographical location, which may be used for transmitting and receiving signals to / from the terminal device. In embodiment of the present disclosure, a TRP may refer to Macro Cell, micro cell, an RRH, a relay, a femto node, a pico node, etc.
[0047] In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a central unit (CU) , a distributed unit (DU) , a radio unit (RU) , a RAN Intelligent Controller (RIC) (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) system, or any combination thereof.
[0048] An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0049] Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signalling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signalling, and may each be at least partially controlled by the CU 160.
[0050] Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .
[0051] A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.
[0052] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.
[0053] The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .
[0054] In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0055] One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.
[0056] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0057] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0058] In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0059] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0060] FIG. 2 illustrates a process flow 200 for supporting data transmission with more than 8 layers in accordance with some example embodiments of the present disclosure. The process flow 200 may involve a UE 201 and a network entity (NW) (e.g. a base station, such as gNB) 202. The process flow 200 may be applied to the wireless communications system 100 with reference to FIG. 1, for example, the UE 201 may be any of UEs 104, and the network entity 202 may be or comprise any of the network entities 102. For example, the network entity 202 may be or include a base station providing a serving cell for the UE 201 and / or base station (s) providing candidate cell (s) . It would be appreciated that the process flow 200 may be applied to other communication scenarios.
[0061] At 210, the network entity 202 transmits, to the UE 201, a signaling 215 to schedule a PDSCH including one or more codewords with more than 8 layers. Correspondingly, at 220, the UE 201 receives the signaling 215 from the network entity 202.
[0062] At 230, the UE 201 determines layer mapping of the one or more codewords to the layers. At 240, the network entity 202 also determines the layer mapping of the one or more codewords to the layers. The UE 201 and the network entity 202 must use the same layer mapping scheme to ensure correct PDSCH decoding.
[0063] Basically, when the UE (e.g. a CPE device) is equipped with for example 16 antennas, up to 16 multiple-input-multiple-output (MIMO) layers transmission can be supported if the network entity is also equipped with at least 16 antennas. It may be hard to support 16 MIMO layers for single TRP scenario because high rank may be hard to be supported by the channel condition. But it still be possible to support more than 8 MIMO layers, e.g., up to 10 or 12 MIMO layers depending on the channel condition. On the other hand, up to 16 MIMO layer transmission may be supported in the multi-TRP scenario, where different MIMO layers are transmitted by different TRPs for a same UE.
[0064] Given above analysis, two different schemes for different maximum MIMO layers corresponding to different UE capabilities.
[0065] Specifically, the UE shall assume that complex-valued modulation symbols for each of the codewords to be transmitted are mapped onto one or several layers. Complex-valued modulation symbols for codeword q shall be mapped onto the layers where ν is the number of layers, is the number of modulation symbols per layer, and is the number of modulation symbols per codeword.
[0066] The first layer mapping scheme is designed for DL and / or UL transmission with up to 12 MIMO layers and up to 2 codewords.
[0067] When the number of maximum MIMO layer is configured as 10 or 12, one or two codewords can be supported with the layer mapping scheme illustrated in Table 1. The UE may determine layer mapping of the codeword (s) to the layers based on Table 1. Note that the layer-to-codeword split may differ from Table 1. For example, a 7-layer transmission may adopt a (4, 3) split other than the (3, 4) split, and similar flexibility applies to 9-layer and 11-layer transmissions. Table 1: Layer mapping scheme for up to 12 layers data transmission with up to 2 codewords.
[0068] For a PDSCH or PUSCH scheduling, the scheduling signaling should indicate two modulation codding schemes (MCS) and two hybrid automatic request (HARQ) processes for two codewords respectively when up to 2 codewords are configured for the bandwidth part (BWP) of the serving cell. Compared with the PDSCH scheduling in 5G NR, larger transport block (TB) size may need to be supported with the same bandwidth, because more layers are assigned for a codeword.
[0069] In some embodiments, one codeword is mapped when up to 4 layers are configured and two codewords are supported when more than 4 layers are supported as illustrated in Table 2. In this case, up to 4 layers are mapped to one codeword for the case that less than 9 layers are scheduled. But when more than 8 layers are scheduled, more than 4 layers will be mapped to one codeword with larger TB size. Table 2: Layer mapping scheme for up to 12 layers data transmission with up to 2 codewords.
[0070] The second layer mapping scheme is designed for DL / UL transmission with up to 16 MIMO layers and up to 4 codewords.
[0071] When the number of maximum MIMO layer is configured as 16, up to 4 codewords can be supported with the layer mapping scheme illustrated in Table 3. Note that the layer-to-codeword split may differ from Table 3 when the number of layers is not divisible by the number of codewords. Table 3: Layer mapping scheme for up to 16 layers data transmission with up to 4 codewords.
[0072] With reference to FIG. 2, at 250, the network entity 202 may transmit a PDSCH 255 with more than two codewords to the UE 201. Correspondingly, at 260, the UE receives from the network entity 202 more than two codewords scheduled for the PDSCH 255.
[0073] There is impact on the data scheduling when more than two codewords are supported. Basically, the scheduling signaling may need to be designed according to the maximum number of layers for the PDSCH or PUSCH configured for the UE in a BWP of a serving cell.
[0074] In a first case, the maximum number of PDSCH / PUSCH layer is less than 4, or the higher layer parameter maxNrofCodeWordsScheduledByDCI is set as 1. In this case, there is only one codeword, and scheduling signalling can be as legacy.
[0075] In a second case, the maximum number of PDSCH / PUSCH layer is larger than 4 and less than 8, or the higher layer parameter maxNrofCodeWordsScheduledByDCI is set as 2. In this case, two Modulation and coding scheme (MCS) , new data indicator (NDI) and Redundancy version (RV) field should be indicated in the scheduling signaling, e.g., DL DCI or the UL grant. If both TBs are enabled, the UE may determine that transport block (TB) 1 and 2 are mapped to codeword (CW) 0 and 1 respectively. If only one TB is enabled, then the enabled TB is always mapped to the first CW, i.e., CW 0.
[0076] In a third case, the maximum number of PDSCH / PUSCH layer is larger than 8 and less than 12, or the higher layer parameter maxNrofCodeWordsScheduledByDCI is set as 3. In this case, three MCS, NDI and RV fields should be indicated in the scheduling signalling.
[0077] One or two of the three TBs can be disabled by the scheduling DCI with special DCI field values. For example, a special value can be indicated for the MCS and RV fields of the disabled TB similar as in 5G NR. If three TBs are enabled, TB 1, 2 and 3 are mapped to CW 0, 1 and 2 respectively. If 2 TBs are enabled, TB 1 and 2 are mapped to the first and the second CW respectively. If only one TB is enabled, then the enabled transport block is always mapped to the first CW.
[0078] In a fourth case, the maximum number of PDSCH / PUSCH layer is larger than 12 and less than 17, or the higher layer parameter maxNrofCodeWordsScheduledByDCI is set as 4. Four MCS, NDI and RV fields should be indicated in the DL DCI or the UL grant.
[0079] In this case, one, two, three of the four TBs can be disabled by the scheduling DCI with special DCI field values. If four TBs are enabled, TB 1, 2, 3 and 4 are mapped to CW 0, 1, 2 and 3 respectively. If three TBs are enabled, TB 1, 2 and 3 are mapped to the first, the second and the third CW respectively. If 2 TBs are enabled, TB 1 and 2 are mapped to the first and the second CW respectively. If only one TB is enabled, then the enabled TB is always be mapped to the first CW. In the first, second, third and fourth case, it can be assumed that up to 4 layers can be scheduled for a CW.
[0080] With reference to FIG. 2, at 270, the UE transmits HARQ-ACK feedback 275 to the network entity 202. Correspondingly, at 280, the network entity 202 receives the HARQ-ACK feedback 275 from the UE 201. The PDSCH with more than 8 layers may have impact on the HARQ-ACK feedback.
[0081] HARQ-ACK spatial bundling is supported in 5G NR to reduce the HARQ-ACK feedback overhead when up to 2 codewords can be scheduled for a PDSCH. Basically, each CW or each TB may have a HARQ-ACK bit to inform the NW that whether the corresponding CW or TB is correctly received by the UE. For example, if the CW or the TB is correctly received, the HARQ-ACK bit shall be reported as 1, i.e., ACK for the CW or the TB. Otherwise, if the CW or the TB is not correctly received or is not received, the HARQ-ACK bit shall be reported as 0, i.e., NACK for the CW or the TB. If the UE is configured by maxNrofCodeWordsScheduledByDCI with reception of two transport blocks in at least one configured DL BWP of a serving cell, the HARQ-ACK bit corresponding to the PDSCH is the binary AND operation of the HARQ-ACK information bits corresponding to the first and second transport blocks of this cell when harq-ACK-SpatialBundlingPUCCH is configured. Otherwise, the UE shall generate two HARQ-ACK bits corresponding to two TBs respectively for this PDSCH.
[0082] When more than two codewords are scheduled for a PDSCH, HARQ-ACK spatial bundling can be straightforwardly supported. For example, the HARQ-ACK bit corresponding to the PDSCH is the binary AND operation of the HARQ-ACK information bits corresponding to each of the transport blocks of this cell. However, this method may be inefficient. For example, if only one of the TBs is not correctly received, all the 3 or even 4 TBs should be retransmitted. A tradeoff is proposed to support partial bundling as follows.
[0083] If the UE is configured by maxNrofCodeWordsScheduledByDCI with reception of 3 transport blocks in at least one configured DL BWP of a serving cell, two HARQ-ACK bits can be generated corresponding to the PDSCH, where the first HARQ-ACK bit is the binary AND operation of the HARQ-ACK information bits corresponding to the first and second transport blocks, and the second HARQ-ACK bit is the HARQ-ACK information bits corresponding to the third transport blocks.
[0084] Alternatively, in this case, the first HARQ-ACK bit is the HARQ-ACK information bits corresponding to the first TB, and the second HARQ-ACK bit is the binary AND operation of the HARQ-ACK information bits corresponding to the second and third TBs
[0085] If the UE is configured by maxNrofCodeWordsScheduledByDCI with reception of 4 transport blocks in at least one configured DL BWP of a serving cell, two HARQ-ACK bits can be generated corresponding to the PDSCH, where the first HARQ-ACK bit is the binary AND operation of the HARQ-ACK information bits corresponding to the first and second transport blocks, and the second HARQ-ACK bit is the binary AND operation of the HARQ-ACK information bits corresponding to the third and fourth transport blocks.
[0086] To support the above HARQ-ACK spatial bundling scheme, the UE shall generate the HARQ-ACK bit corresponding to each TB as the following scheme.
[0087] In some cases, the UE receives a PDSCH with one TB and the value of maxNrofCodeWordsScheduledByDCI is 3 in a BWP of a serving cell. If the HARQ-ACK spatial bundling is not configured, i.e., harq-ACK-SpatialBundlingPUCCH is not provided) the HARQ-ACK information is associated with the first TB and the UE generates a NACK for the second and the third TB.
[0088] If the harq-ACK-SpatialBundlingPUCCH is provided, the HARQ-ACK information is associated with the first TB, and the UE generates an ACK for the second TBs and generates a NACK for the third TB. Alternatively, if harq-ACK-SpatialBundlingPUCCH is provided, the HARQ-ACK information is associated with the first TB, and the UE generates a NACK for the second and the third TB. This depends on the how the HARQ-ACK spatial bundling is applied to the three TBs, i.e., the association between the TBs.
[0089] In some cases, the UE receives a PDSCH with two TB and the value of maxNrofCodeWordsScheduledByDCI is 3 in a BWP of a serving cell. The HARQ-ACK information is associated with the first and the second TB and the UE generates NACK for the third TB. Alternatively, if harq-ACK-SpatialBundlingPUCCH is provided, the HARQ-ACK information is associated with the first and the second TB, and the UE generates ACK for the third TB.
[0090] In some cases, the UE receives a PDSCH with three TBs and the value of maxNrofCodeWordsScheduledByDCI is 3 in a BWP of a serving cell. Then, the HARQ-ACK information is associated with each of the TBs.
[0091] In some cases, the UE receives a PDSCH with one TB and the value of maxNrofCodeWordsScheduledByDCI is 4 in a BWP of a serving cell. If harq-ACK-SpatialBundlingPUCCH is not provided, the HARQ-ACK information may be associated with the first TB and the UE may generate a NACK for the second, the third and the fourth TB. If harq-ACK-SpatialBundlingPUCCH is provided, the HARQ-ACK information may be associated with the first TB, and the UE may generate ACK for the second TBs and generates NACK for the third and the fourth TB.
[0092] In some cases, the UE receives a PDSCH with two TBs and the value of maxNrofCodeWordsScheduledByDCI is 4 in a BWP of a serving cell, the HARQ-ACK information may be associated with the first and the second TB, and the UE may generate NACK for the third and the fourth TB.
[0093] In some cases, the UE receives a PDSCH with three TBs and the value of maxNrofCodeWordsScheduledByDCI is 4 in a BWP of a serving cell. If harq-ACK-SpatialBundlingPUCCH is not provided, the HARQ-ACK information may be associated with the first, second and the third TB, and the UE may generate NACK for the third and the fourth TB. If harq-ACK-SpatialBundlingPUCCH is provided, the HARQ-ACK information may be associated with the first, second and the third TB, and the UE may generate ACK for the third and the fourth TB.
[0094] In some cases, the UE receive a PDSCH with four TBs and the value of maxNrofCodeWordsScheduledByDCI is 4 in a BWP of a serving cell. Then, the HARQ-ACK information is associated with each of the TBs.
[0095] FIG. 3 illustrates an example of a device that is suitable for implementing some embodiments of the present disclosure. The device 300 may be an example of a UE 104 or network entity 102 as described herein. The device 300 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 300 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 302, a memory 304, a transceiver 306, and, optionally, an I / O controller 308. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0096] The processor 302, the memory 304, the transceiver 306, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 302, the memory 304, the transceiver 306, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0097] In some implementations, the processor 302, the memory 304, the transceiver 306, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 302 and the memory 304 coupled with the processor 302 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 302, instructions stored in the memory 304) .
[0098] For example, the processor 302 may support wireless communication at the device 300 in accordance with examples as disclosed herein. The device 300 may be an example of a UE 104. In this case, the processor 302 may be configured to operable to support means for receiving, from a network entity, a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and means for determining layer mapping of the one or more codewords to the layers.
[0099] The device 300 may be an example of a network entity, e.g., a network entity 102. In this case, the processor 302 may be configured to operable to support means for transmitting, to a user equipment (UE) , a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and means for receiving, from the UE, a beam report indicating one or more new beams for at least one of the one or more CSI report configurations.
[0100] The processor 302 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some implementations, the processor 302 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 302. The processor 302 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 304) to cause the device 300 to perform various functions of the present disclosure.
[0101] The memory 304 may include random access memory (RAM) and read-only memory (ROM) . The memory 304 may store computer-readable, computer-executable code including instructions that, when executed by the processor 302 cause the device 300 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 302 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 304 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0102] The I / O controller 308 may manage input and output signals for the device 300. The I / O controller 308 may also manage peripherals not integrated into the device 300. In some implementations, the I / O controller 308 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 308 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 308 may be implemented as part of a processor, such as the processor 302. In some implementations, a user may interact with the device 300 via the I / O controller 308 or via hardware components controlled by the I / O controller 308.
[0103] In some implementations, the device 300 may include a single antenna 310. However, in some other implementations, the device 300 may have more than one antenna 310 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 306 may communicate bi-directionally, via the one or more antennas 310, wired, or wireless links as described herein. For example, the transceiver 306 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 306 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 310 for transmission, and to demodulate packets received from the one or more antennas 310. The transceiver 306 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0104] A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 310 for transmitting the amplified signal into the air or wireless medium.
[0105] A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 310 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0106] FIG. 4 illustrates an example of a processor 400 is suitable for implementing some embodiments of the present disclosure. The processor 400 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 400 may include a controller 402 configured to perform various operations in accordance with examples as described herein. The processor 400 may optionally include at least one memory 404. Additionally, or alternatively, the processor 400 may optionally include one or more arithmetic-logic units (ALUs) 406. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0107] The processor 400 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 400) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0108] The controller 402 may be configured to manage and coordinate various operations (e.g., signalling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 400 to cause the processor 400 to support various operations in accordance with examples as described herein. For example, the controller 402 may operate as a control unit of the processor 400, generating control signals that manage the operation of various components of the processor 400. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0109] The controller 402 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 404 and determine subsequent instruction (s) to be executed to cause the processor 400 to support various operations in accordance with examples as described herein. The controller 402 may be configured to track memory address of instructions associated with the memory 404. The controller 402 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 402 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 400 to cause the processor 400 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 402 may be configured to manage flow of data within the processor 400. The controller 402 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 400.
[0110] The memory 404 may include one or more caches (e.g., memory local to or included in the processor 400 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 404 may reside within or on a processor chipset (e.g., local to the processor 400) . In some other implementations, the memory 404 may reside external to the processor chipset (e.g., remote to the processor 400) .
[0111] The memory 404 may store computer-readable, computer-executable code including instructions that, when executed by the processor 400, cause the processor 400 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 402 and / or the processor 400 may be configured to execute computer-readable instructions stored in the memory 404 to cause the processor 400 to perform various functions (e.g., UE initiated beam reporting) . For example, the processor 400 and / or the controller 402 may be coupled with or to the memory 404, the processor 400, the controller 402, and the memory 404 may be configured to perform various functions described herein. In some examples, the processor 400 may include multiple processors and the memory 404 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
[0112] The one or more ALUs 406 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 406 may reside within or on a processor chipset (e.g., the processor 400) . In some other implementations, the one or more ALUs 406 may reside external to the processor chipset (e.g., the processor 400) . One or more ALUs 406 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 406 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 406 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 406 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 406 to handle conditional operations, comparisons, and bitwise operations.
[0113] The processor 400 may support wireless communication in accordance with examples as disclosed herein. The processor 400 may implemented at a UE 104. In this case, the processor 400 may be configured to operable to support means for receiving, from a network entity, a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and means for determining layer mapping of the one or more codewords to the layers.
[0114] The processor 400 may implemented at a network entity 102, e.g. a base station. In this case, the processor 400 may be configured to operable to support means for transmitting, to a user equipment (UE) , a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; and means for determining layer mapping of the one or more codewords to the layers.
[0115] FIG. 5 illustrates a flowchart of a method 500 performed by a UE in accordance with aspects of the present disclosure. The operations of the method 500 may be implemented by a device or its components as described herein. For example, the operations of the method 500 may be performed by a UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0116] At 510, the method may include receiving, from a network entity, a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers. The operations of 510 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 510 may be performed by a UE 104 as described with reference to FIG. 1.
[0117] At 520, the method may include determining layer mapping of the one or more codewords to the layers. The operations of 520 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 520 may be performed by a UE 104 as described with reference to FIG. 1.
[0118] FIG. 6 illustrates a flowchart of a method 600 performed by a network entity in accordance with aspects of the present disclosure. The operations of the method 600 may be implemented by a device or its components as described herein. For example, the operations of the method 600 may be performed by a network entity 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0119] At 610, the method may include transmitting, to a user equipment (UE) , a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers. The operations of 610 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 610 may be performed by a network entity 102 as described with reference to FIG. 1.
[0120] At 620, the method may include determining layer mapping of the one or more codewords to the layers. The operations of 620 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 620 may be performed by a network entity 102 as described with reference to FIG. 1.
[0121] It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0122] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0123] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0124] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
[0125] As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on”shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.
[0126] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment (UE) comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:receive, from a network entity, a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; anddetermine layer mapping of the one or more codewords to the layers.2.The UE of claim 1, wherein up to 2 codewords and up to 16 layers are scheduled, and to determine layer mapping of one or more codewords to the layers, the processor is configured to:in case of 9 layers being scheduled, determine that a first codeword has 4 layers and a second codeword has 5 layers;in case of 10 layers being scheduled, determine that the first codeword has 5 layers and the second codeword has 5 layers;in case of 11 layers being scheduled, determine that the first codeword has 5 layers and the second codeword has 5 layers;in case of 12 layers being scheduled, determine that the first codeword has 6 layers and the second codeword has 6 layers;in case of 13 layers being scheduled, determine that the first codeword has 6 layers and the second codeword has 7 layers;in case of 14 layers being scheduled, determine that the first codeword has 7 layers and the second codeword has 7 layers;in case of 15 layers being scheduled, determine that the first codeword has 7 layers and the second codeword has 8 layers; orin case of 16 layers being scheduled, determine that the first codeword has 8 layers and the second codeword has 8 layers.3.The UE of claim 1, wherein more than 2 codewords and up to 16 layers are scheduled, and wherein each codeword is mapped to no more than 4 layers.4.The UE of claim 3, wherein to determine layer mapping of one or more codewords to the layers, the processor is configured to:in case of 9 layers being scheduled, determine that a first codeword has 3 layers, a second codeword has 3 layers, and a third codeword has 3 layers;in case of 10 layers being scheduled, determine that the first codeword has 3 layers, the second codeword has 3 layers, and the third codeword has 4 layers;in case of 11 layers being scheduled, determine that the first codeword has 3 layers, the second codeword has 4 layers, and the third codeword has 4 layers;in case of 12 layers being scheduled, determine that the first codeword has 4 layers, the second codeword has 4 layers, and the third codeword has 4 layers;in case of 13 layers being scheduled, determine that the first codeword has 3 layers, the second codeword has 3 layers, the third codeword has 3 layers, and the fourth codeword has 4 layers;in case of 14 layers being scheduled, determine that the first codeword has 3 layers, the second codeword has 3 layers, the third codeword has 4 layers, and the fourth codeword has 4 layers;in case of 15 layers being scheduled, determine that the first codeword has 3 layers, the second codeword has 4 layers, the third codeword has 4 layers, and the fourth codeword has 4 layers; orin case of 16 layers being scheduled, determine that the first codeword has 4 layers, the second codeword has 4 layers, the third codeword has 4 layers, and the fourth codeword has 4 layers.5.The UE of claim 1, wherein the maximum number of codewords scheduled by downlink control information (DCI) for the PDSCH is configured as 3, and the scheduling signaling indicates three modulation coding scheme (MCS) , new data indicator (NDI) and redundancy version (RV) fields.6.The UE of claim 5, wherein the processor is further configured to:in case of three transport blocks (TBs) enabled by the scheduling signaling, determine that a first TB, a second TB, and a third TB are mapped to a first codeword, a second codeword, and a third codeword, respectively; orin case of two TBs enabled by the scheduling signaling, determine that the first TB and the second TB are mapped to the first codeword and the second codeword, respectively; orin case of one TB enabled by the scheduling signaling, determine that the first TB is mapped to the first codeword.7.The UE of claim 1, wherein the maximum number of codewords scheduled by DCI for the PDSCH is configured as 4, and the scheduling signaling indicates four MCS, NDI and RV fields.8.The UE of claim 7, wherein the processor is further configured to:in case of four TBs enabled by the scheduling signaling, determine that a first TB, a second TB, a third TB and a fourth TB are mapped to a first codeword, a second codeword, a third codeword, and a fourth codeword, respectively; orin case of three TBs enabled by the scheduling signaling, determine that the first TB, the second TB, and the third TB are mapped to the first codeword, the second codeword and the third codeword, respectively; orin case of two TBs enabled by the scheduling signaling, determine that the first TB and the second TB are mapped to the first codeword and the second codeword, respectively; orin case of one TB enabled by the scheduling signaling, determine that the first TB is mapped to the first codeword.9.The UE of claim 1, wherein the processor is further configured to:generate hybrid automatic repeat request-acknowledgement (HARQ-ACK) information corresponding to the one or more codewords of the scheduled PDSCH.10.The UE of claim 9, wherein the maximum number of codewords scheduled by DCI for the PDSCH is configured as 3, and wherein HARQ-ACK spatial bundling is configured, and to generate the HARQ-ACK information corresponding to more than two codewords of the scheduled PDSCH, the processor is configured to:generate a first HARQ-ACK bit based on a binary AND operation of HARQ-ACK information bits corresponding to a first and a second TBs, and a second HARQ-ACK bit based on a HARQ-ACK information bit corresponding to a third TB.11.The UE of claim 10, wherein the PDSCH includes one TB, the first HARQ-ACK bit being associated with the first TB, and the processor is further configured to:generate an ACK for the second TB and a NACK for the third TB.12.The UE of claim 10, wherein the PDSCH includes two TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the processor is further configured to:generate a NACK for the third TB.13.The UE of claim 10, wherein the PDSCH includes three TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the second HARQ-ACK bit being associated with the third TB.14.The UE of claim 9, wherein the maximum number of codewords scheduled by DCI for the PDSCH is configured as 4, and wherein HARQ-ACK spatial bundling is configured, and to generate the HARQ-ACK information corresponding to more than two codewords of the scheduled PDSCH, the processor is configured to:generate a first HARQ-ACK bit based on a binary AND operation of HARQ-ACK information bits corresponding to a first and a second TBs, and a second HARQ-ACK bit based on the binary AND operation of HARQ-ACK information bits corresponding to a third and a fourth TBs.15.The UE of claim 14, wherein the PDSCH includes one TB, the first HARQ-ACK bit being associated with the first TB, and the processor is further configured to:generate an ACK for the second TB and NACKs for the third and fourth TBs.16.The UE of claim 14, wherein the PDSCH includes two TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the processor is further configured to:generate NACKs for the third and fourth TBs.17.The UE of claim 14, wherein the PDSCH includes three TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the second HARQ-ACK bit being associated with the third TB, and the processor is further configured to:generate an ACK for the fourth TB.18.The UE of claim 14, wherein the PDSCH includes four TBs, the first HARQ-ACK bit being associated with the first and second TBs, and the second HARQ-ACK bit being associated with the third and the fourth TBs.19.A network entity comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:transmit, to a user equipment (UE) , a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; anddetermine layer mapping of the one or more codewords to the layers.20.A processor for wireless communication, comprising:at least one memory; anda controller coupled with the at least one memory and configured to cause the controller to:receive, from a network entity, a scheduling signaling to schedule a physical downlink shared channel (PDSCH) including one or more codewords with more than 8 layers; anddetermine layer mapping of the one or more codewords to the layers.
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