Partial-coherent and full-coherent codebook design for 3TX pusch transmission
The patent addresses the challenges of 3Tx PUSCH transmission by designing partial-coherent and full-coherent codebooks and enhancing TPMI indications, thereby enhancing uplink performance and supporting advanced hardware technologies.
Patent Information
- Application Number
- PCT/CN2024/092041
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-04-03
AI Technical Summary
The existing technologies face challenges in supporting 3Tx PUSCH transmission, particularly in designing 3Tx codebooks and transmitting precoding matrix indicators (TPMI) effectively.
The proposed solution involves designing partial-coherent and full-coherent codebooks for 3Tx PUSCH transmission, along with enhanced TPMI indications to support 3-antenna-port PUSCH transmissions.
This solution enables efficient 3Tx PUSCH transmission by providing effective codebook designs and TPMI indications, improving uplink performance and anticipating advancements in hardware and design technology.
Smart Images

Figure CN2024092041_03042025_PF_FP_ABST
Abstract
Description
PARTIAL-COHERENT AND FULL-COHERENT CODEBOOK DESIGN FOR 3TX PUSCH TRANSMISSIONTECHNICAL 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 a computer readable medium for supporting partial-coherent and full-coherent codebook for 3Tx physical uplink shared channel (PUSCH) transmission.BACKGROUND
[0002] A wireless communication 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) ) .
[0003] In Rel-15, 1-port, 2-port and 4-port PUSCH transmission are supported. In Rel-18, 8-port PUSCH transmission is supported. Current commercial mobile UEs are generally equipped with only 1 or 2 Tx antennas. To enhance uplink (UL) performance and anticipating advancements in hardware and design technology, 3Tx antennas PUSCH transmission is supported in Rel-19. Issues regarding this matter need to be studied.SUMMARY
[0004] To support the 3Tx or 3-antenna-port (for short, 3-port) PUSCH transmission, some issues need to be resolved. For example, the design of 3Tx codebooks and transmitted precoding matrix indicator (TPMI) indication. Embodiments of the disclosure target the relevant issues of supporting 3Tx PUSCH transmission.
[0005] The present disclosure relates to a UE, a network entity, a processor for wireless communication, methods, and a computer readable medium for supporting partial-coherent and full-coherent codebook for 3Tx PUSCH transmission.
[0006] 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 codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding; and receive, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0007] In a second aspect, there is provided a network entity, comprising: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: transmit, to a user equipment (UE) , a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding; and transmit, to the UE, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0008] In a third aspect, there is provided a processor for wireless communication. The a processor comprise 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 codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding, and receive, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0009] In a fourth aspect, there is provided method performed by a user equipment (UE) , the method comprising: receiving, from a network entity, a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding, and receiving, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0010] In a fifth aspect, there is provided method performed by a network entity, the method comprising: transmit, to a user equipment (UE) , a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding, and transmit, to the UE, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI ) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0011] 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.
[0012] In some implementations of the methods, the UE and the network entity, for the first configuration, the set of 3-port precoding matrices comprise non-coherent precoding matrices and partial-coherent precoding matrices, or for the second configuration, the set of 3-port precoding matrices comprise the non-coherent precoding matrices, the partial-coherent precoding matrices and full-coherent precoding matrices.
[0013] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 1, the partial-coherent precoding matrices comprise at least one of
[0014] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 2, the partial-coherent precoding matrices comprise at least one of:
[0015] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 2, the partial-coherent precoding matrices comprise at least one of:
[0016] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 3, the partial-coherent precoding matrices comprise at least one of:
[0017] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 2, the partial-coherent precoding matrices comprise at least one of:
[0018] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 3, the partial-coherent precoding matrices comprise at least one of:
[0019] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 1, the full-coherent precoding matrices comprise at least one of:
[0020] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 2, the full-coherent precoding matrices comprise at least one of:
[0021] In some implementations of the methods, the UE and the network entity, for the PUSCH transmission with a rank being 3, the full-coherent precoding matrices comprise at least one of:
[0022] In some implementations of the methods, the UE and the network entity, the full-coherent precoding matrices comprise: at least one of for the PUSCH transmission with a rank being 1, at least one of for the rank being 2; and at least one of for the rank being 3.
[0023] In some implementations of the methods, the UE and the network entity, in a case that the maximum rank of the PUSCH transmission is larger than one, the TPMI field comprises five bits; or in a case that the maximum rank of the PUSCH transmission is one, the TPMI field comprises three bits for the first configuration or four bits for the second configuration.
[0024] In some implementations of the methods, the UE and the network entity, the DCI or the CG configuration further includes a second TPMI field indicative of a second 3-port precoding matrix and a second number of layers for the PUSCH transmission.
[0025] In some implementations of the methods, the UE and the network entity, in a case that the PUSCH is transmitted with single frequency network (SFN) scheme or a time division multiplexing (TDM) scheme, if the maximum rank of the PUSCH transmission is larger than one, the second TPMI field comprises four bits, or if the maximum rank of the PUSCH transmission is being one, the second TPMI field comprises three bits for the first configuration or four bits for the second configuration.
[0026] In some implementations of the methods, the UE and the network entity, in a case that the PUSCH is transmitted with space division multiplexing (SDM) scheme, if the maximum rank of the PUSCH transmission is larger than one, the second TPMI field comprises five bits; or if the maximum rank of the PUSCH transmission is one, the second TPMI field comprises three bits for the first configuration or four bits for the second configuration.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 an example of a process flow for facilitating 3Tx PUSCH transmission in accordance with some example embodiments of the present disclosure.
[0029] FIG. 3A illustrates an example of antenna ports arrangement for 3Tx transmission in accordance with some example embodiments of the present disclosure.
[0030] FIG. 3B illustrates an example of antenna ports arrangement for 3Tx transmission in accordance with some example embodiments of the present disclosure.
[0031] FIG. 4 illustrates an example of a device that is suitable for implementing some embodiments of the present disclosure.
[0032] FIG. 5 illustrates an example of a processor that is suitable for implementing some embodiments of the present disclosure.
[0033] FIG. 6 illustrates a flowchart of a method that performed by a user equipment in accordance with aspects of the present disclosure.
[0034] FIG. 7 illustrates a flowchart of a method that performed by a network entity in accordance with aspects of the present disclosure.
[0035] Throughout the drawings, the same or similar reference numerals represent the same or similar elements.DETAILED DESCRIPTION
[0036] 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.
[0037] 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.
[0038] 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.
[0039] 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 “Aand / or B” can mean either “only A” or “only B” or “both A and B. ” Other definitions, explicit and implicit, may be included below.
[0040] Embodiments of the disclosure relates issues on 3-antenna-port PUSCH transmission. In Rel-19 multiple-input-multiple-output (MIMO) work item description (WID) , it was agreed to specify non-coherent uplink (UL) codebook to facilitate 3-antenna-port codebook-based transmissions, without enhancement on UL full power transmission and without enhancement on SRS resource.
[0041] For non-coherent uplink precoding by a 3Tx UE, it was agreed that at least following precoders are supported for single-layer transmission at least following precoders are supported for two-layer transmission and at least following precoders are supported for three-layer transmission
[0042] It was agreed that antenna ports 1000, 1001, and 1002 are used for 3Tx PUSCH transmission and PUSCH antenna port 1000 and 1002 in indicated TPMI (s) share phase tracking-reference signal (PT-RS) port 0, and PUSCH antenna port 1001 is associated with PT-RS port 1. Therefore, PUSCH antenna port 1000 and 1002 are coherent and a single PT-RS port may be used to estimate the phase error of PUSCH antenna port 1000 or 1002. The PUSCH antenna port 1001 is non-coherent with any of PUSCH antenna port 1000 and 1002. The other PT-RS port may be used to estimate the phase error of PUSCH antenna port 1001.
[0043] It was also agreed to study partial-coherent codebook design for supporting 3Tx PUSCH transmission. Besides, the full-coherent codebook is also included considering the possible application in 6G. With the introducing of partial-coherent and / or full-coherent codebooks for 3Tx PUSCH transmission, transmitted precoding matrix indicator (TPMI) indication also need to be enhanced. In view of this, this disclosure targets the full-coherent and partial-coherent codebook design and TPMI indication to support 3 Tx PUSCH transmission.
[0044] According to embodiments of the disclosure, a user equipment (UE) may receive from a network entity (e.g. a base station, such as gNB) a codebook subset configuration (e.g. a codebookSubset configuration) for a 3-port codebook based PUSCH transmission. The codebook subset configuration may be partialAndNonCoherent which indicates support of partial-coherent precoding and non-coherent precoding or a “fullyAndPartialAndNonCoherent” which indicate support of full-coherent precoding, partial-coherent precoding and non-coherent precoding. The UE may further receive, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a TPMI field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission. Throughout this disclosure, the terms “TPMI” , “TPMI indication” or “TPMI field” refer to the precoding information and number of layers field in standards, and terms “precoding matrix (matrices) ” or “precoder (s) ” may be interchangeably used with “codebook (s) ” .
[0045] 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.
[0046] 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 signaling, transmit signaling) 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.
[0047] 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.
[0048] 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. In some other implementations, a UE 104 may be a UAV UE and may communicate with one or more network entities 102 while flying.
[0049] 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.
[0050] 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.
[0051] 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) .
[0052] 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.
[0053] 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) ) .
[0054] 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 signaling (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 signaling, and may each be at least partially controlled by the CU 160.
[0055] 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) .
[0056] 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.
[0057] 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.
[0058] 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) .
[0059] 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.
[0060] 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.
[0061] 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.
[0062] 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.
[0063] 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.
[0064] 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.
[0065] FIG. 2 illustrates an example of a process flow for facilitating 3Tx PUSCH transmission in accordance with some example embodiments of the present disclosure. The process flow 200 may involve a UE 201 and a network entity (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 any of the network entities 102. It would be appreciated that the process flow 200 may be applied to other communication scenarios.
[0066] At 210, the network entity 202 may transmit, to the UE 201, a codebook subset configuration 215 for a 3-port codebook based PUSCH transmission. Accordingly, at 220, the UE 201 receives the codebook subset configuration 215. The codebook subset configuration may be a higher layer parameter, e.g., “codebookSubset” , which is based on UE capability reporting. In some embodiments, the codebook subset configuration 215 may comprise a first configuration indicating support of partial-coherent precoding and non-coherent precoding, for example, codebookSubset=partialAndNonCoherent. Alternatively, the codebook subset configuration 215 may comprise a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding, for example, codebookSubset=fullyAndPartialAndNonCoherent.
[0067] At 230, the network entity 202 may transmit, to the UE 201, DCI or a CG configuration 235 including a TPMI field indicative of a 3-port precoding matrix (or referred as codebook or codeword) selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission. Accordingly, the UE 201 receives the DCI or the CG configuration 235 from the network entity 202. In some embodiments, the UE 201 and the network entity may have predefined 3-port codebook based precoding matrices, including non-coherent, partial-coherent and / or full-coherent codebooks. The codebook subset configuration 215 may indicate a subset of the predefined 3-port codebooks from which the TPMI field may apply to select a 3-port codebook and indicate the number of layers for the PUSCH transmission.
[0068] In some embodiments, for the first configuration indicating support of partial-coherent precoding and non-coherent precoding, the codebook subset may comprise non-coherent codebooks and partial-coherent codebooks, and for the second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding, the codebook subset may comprise non-coherent codebooks, partial-coherent codebooks and full-coherent codebooks.
[0069] The predefined 3-port codebooks may be grouped by the rank value, for example, rank 1, rank 2, or rank 3. For each rank, the predefined codebooks may include non-coherent codebooks, the partial-coherent codebooks and full-coherent codebooks that are ordered in increasing order of TPMI index. Hereafter, methods for generating the partial-coherent codebooks and the full-coherent codebooks with different ranks will be described.
[0070] For Rank 1, the partial-coherent codebooks may be realized by applying the 2Tx full-coherent codebooks to the coherent antennas, including Since PUSCH antenna port 1000 and 1002 are coherent, the partial-coherent codebooks for 3Tx transmission with rank 1 may include at least one of The implementation by removing the last row of 4Tx partial-coherent codebooks has the same results.
[0071] For Rank 2, the following implementations are provided to generate the partial-coherent codebooks. In a first implementation, the partial-coherent codebooks with rank 2 may be generated based on 4Tx partial-coherent codebooks. The 4Tx partial-coherent codebooks with rank 2 are defined with highlight (i.e., TPMI indexes from 6 to 13) in Table 1 below, which is reproduced from Table 6.3.1.5-5 in TS 38.211. By removing the last row, the partial-coherent codebooks are Accordingly, the partial-coherent codebooks for 3Tx transmission with rank 2 may include at least one of
[0072] Table1: Precoding matrix W for two-layer transmission using four antenna ports with transform precoding disabled.
[0073] In a second implementation, the partial-coherent codebooks with rank 2 may be generated based on 2Tx full-coherent codebooks. The 2Tx full-coherent codebooks includes rank 1 codebooks: Since PUSCH antenna port 1000 and 1002 are coherent, the partial-coherent codebooks for 3Tx transmission with rank 2 may include at least one of: The 2Tx full-coherent codebooks also includes rank 2 codebooks then the partial-coherent codebooks for 3Tx transmission with rank 2 may include at least one of: Therefore in this implementation, the partial-coherent codebooks for 3Tx transmission with rank 2 may include at least one of:
[0074] In a third implementation, the partial-coherent codebooks with rank 2 may be generated based on 8Tx partial-coherent codebooks design. In Rel-18, antenna group is introduced to define codebooks for 8Tx transmission where antenna ports within an antenna group are coherent and antenna ports across different antenna groups are non-coherent. In 3Tx transmission, an example of arrangement of antenna ports is shown in FIG. 3A, where antenna group 0 includes two coherent antenna port 0 and 2, and antenna port group 1 includes antenna port 1.
[0075] For rank 2, two ranks may be transmitted on antenna ports in two antenna groups, then the partial-coherent codebooks may comprise at least one of Alternatively, the two ranks may be transmitted on two antenna ports in one antenna group, i.e., antenna group 0, then the partial-coherent codebooks are may comprise at least one of The orthogonality between the two layers can be ensured by the orthogonal cover codes (OCCs) in the first two codebooks, which may be affected by the channel matrix and the noise. For the last four codebooks, the orthogonality between the two layers can always be satisfied. For the last four codebooks, to ensure the same transmit power across each antenna port, the codebooks can be enhanced as Therefore in this implementation, the partial-coherent codebooks for 3Tx transmission with rank 2 at least include one of
[0076] For rank 3, following implementations are provided to generate partial-coherent codebooks for 3Tx. In a first implementation, the partial-coherent codebooks may be generated based on 2Tx full-coherent codebooks. The 2Tx full-coherent codebooks include then the partial-coherent codebooks for 3Tx transmission with rank 3 may include Therefore, the partial-coherent codebooks for 3Tx transmission with rank 3 at least include one of:
[0077] In a second implementation, the partial-coherent codebooks may be generated based on 8Tx partial-coherent codebooks design. The 3 layers are transmitted on all the antenna ports in the two antenna groups. For the two layers transmitted on PUSCH antenna port 1000 and 1002, more orthogonal codes may be introduced as the implementation for rank 2 codebooks. Therefore, the partial-coherent codebooks for 3Tx transmission with rank 3 may include at least one of:
[0078] For a UE reporting its capability of “partialAndNonCoherent” , PUSCH transmission may use the non-coherent codebooks and partial-coherent codebooks. Then the codebooks for 3Tx transmission for each rank is shown in Table 2 to Table 4 where Table 3a and Table 3b is for the first implementation and the second implementation for generating partial-coherent codebooks for rank 2 respectively.
[0079] Table 2: Precoding matrix W for single-layer transmission for three antenna ports
[0080] Table 3a: Precoding matrix W for two-layer transmission for three antenna ports (implementation 1)
[0081] Table 3b: Precoding matrix W for two-layer transmission for three antenna ports (implementation 2)
[0082] Table 4: Precoding matrix W for three-layer transmission for three antenna ports (implementation 1)
[0083] The full-coherent codebooks may be generated by the following implementations. In a first implementation, the full-coherent codebooks may generated based on Rel-15 DL type 1 single panel codebook. FIG. 3B illustrates an example of arrangement of three antenna ports, where the three antenna ports are coherent with N1=3 and N2=1 and the oversampling factor O1=O2=1. The difference from Rel-15 DL type 1 single panel codebook is that there will be no polarization in 3Tx transmission. Then the orthogonal codes for generating the codebooks are which are same as DFT (Discrete Fourier Transform) codes of length 3. Therefore, the codebooks for 3Tx full-coherent transmission may comprise for rank 1, for rank 2, and for rank 3, respectively.
[0084] In a second implementation, the full-coherent codebooks may be generated based on UL 4Tx full-coherent codebooks. The full-coherent codebooks for 3Tx transmission maybe generated by removing the last row of the 4Tx full-coherent codebooks for rank 1, rank 2 and rank 3 specified in TS 38.212. Then the codebooks for 3Tx full-coherent transmission for rank 1 may include at least one of: The codebooks for 3Tx full-coherent transmission for rank 2 may include at least one of: The codebooks for 3Tx full-coherent transmission for rank 3 may include at least one of:
[0085] In some embodiments, the TPMI may indicate the number of layers of PUSCH transmission and the associated precoder jointly. For a UE reporting its capability of “partialAndNonCoherent” , the PUSCH transmission may use the non-coherent codebook and partial-coherent codebooks. For a UE reporting its capability of “fullyAndPartialAndNonCoherent” , the PUSCH transmission may use the non-coherent codebook and partial-coherent codebooks and full-coherent codebooks.
[0086] As an example, the partial-coherent codebooks are generated based on Rel-15 UL 2Tx full-coherent codebooks and the full-coherent codebooks are generated based on Rel-15 DL type 1 single panel codebook (i.e., the first implementation) . Therefore, for a codebook-based PUSCH transmission, if the maximum rank of PUSCH transmission is larger than one, Table 5 may be used to indicate the precoding information and the actual number of layers; if the maximum rank of PUSCH transmission is one, Table 6 may be used to indicate the precoding information and the actual number of layers. The maximum rank is configured by the higher layer parameters maxRank. If the single frequency network (SFN) scheme is configured for PUSCH transmission, the maximum rank is max{maxRank, maxRankSfn} and if the space division multiplexing (SDM) scheme is configured for PUSCH transmission, the maximum rank is max {maxRank, maxRankSdm} . It is to be understood that different implementation of the partial-coherent codebooks and the full-coherent codebooks are also possible, which may result in different ranges of TPMI.
[0087] Table 5: Precoding information and number of layers or Second Precoding information for 3 antenna ports, if transform precoder is disabled, maxRank = 2 or 3 or max {maxRank, maxRankSfn} = 2 or 3 or max {maxRank, maxRankSdm} = 2 or 3 or maxRankSdm= 2, and ul-FullPowerTransmission is not configured or configured to fullpower
[0088] Table 6: Precoding information and number of layers or Second Precoding information, for 3 antenna ports, if transform precoder is enabled and ul-FullPowerTransmission is either not configured or configured to fullpower, or if transform precoder is disabled, maxRank = 1 or max{maxRank, maxRankSfn} = 1 or max {maxRank, maxRankSdm} = 1 or maxRankSdm= 1 or maxRankSfn= 1, and ul-FullPowerTransmission is not configured or configured to fullpower
[0089] Referring to Table 5, if the maximum rank of the PUSCH transmission is larger than one, the TPMI indication comprises five bits, . Referring to Table 6, if the maximum rank of the PUSCH transmission is one, the TPMI indication comprises three bits for codebookSubset= partialAndNonCoherent, , or four bits for codebookSubset=fullyAndPartialAndNonCoherent, .
[0090] For a multiple transmission / reception points (m-TRPs) scenario, the DCI or the CG configuration may further includes a second TPMI field indicative of a second 3-port codebook and a second number of layers for the PUSCH transmission. On the second TPMI indication, for different PUSCH transmission schemes, the indication may be different. Specifically, if the PUSCH is transmitted with SFN scheme or TDM scheme, the actual number of layers is same as indicated by the first TPMI. And Table 7 and Table 6 may be used for indicating the precoder for maximum rank being larger than one and maximum rank being one respectively. If SDM scheme is configured for the PUSCH transmission, Table 5 and Table 6 may be used for indicating the precoder for maximum rank being larger than one and maximum rank being one respectively.
[0091] Table 7: Second precoding information, for 3 antenna ports, if transform precoder is disabled, maxRank = 2 or 3 or maxRankSfn = 2, and ul-FullPowerTransmission is not configured or configured to fullpower
[0092] In a scenario where the PUSCH is transmitted with the SFN scheme or the time division multiplexing (TDM) scheme, if the maximum rank of the PUSCH transmission is larger than one, the second TPMI indication may comprise four bits (Table 7) , which is one bit less than the first TPMI indication. If the maximum rank of the PUSCH transmission is being one, the second TPMI indication comprises three bits for codebookSubset= partialAndNonCoherent, or four bits for codebookSubset=fullyAndPartialAndNonCoherent, as shown in Table 6. In addition, since Table 5 and Table 6 still apply for the scenario where the PUSCH is transmitted with the SDM scheme, the second TPMI indication comprise the same number of bits as the first TPMI indication for the maximum rank larger (five bits) and equal to one (four bits) .
[0093] FIG. 4 illustrates an example of a device that is suitable for implementing some embodiments of the present disclosure. The device 400 may be an example of a UE 104 or network entity 102 as described herein. The device 400 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 400 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 402, a memory 404, a transceiver 406, and, optionally, an I / O controller 408. 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) .
[0094] The processor 402, the memory 404, the transceiver 406, 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 402, the memory 404, the transceiver 406, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0095] In some implementations, the processor 402, the memory 404, the transceiver 406, 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 402 and the memory 404 coupled with the processor 402 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 402, instructions stored in the memory 404) .
[0096] For example, the processor 402 may support wireless communication at the device 400 in accordance with examples as disclosed herein. The device 400 may be an example of a UE 104. In this case, the processor 402 may be configured to operable to support means for receive, from a network entity, a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding; and means for receiving, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0097] The device 400 may be an example of a network entity 102, e.g. a network entity. In this case, the processor 402 may be configured to operable to support means for transmitting, to a user equipment (UE) , a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding; and means for transmitting, to the UE, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0098] The processor 402 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 402 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 402. The processor 402 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 404) to cause the device 400 to perform various functions of the present disclosure.
[0099] The memory 404 may include random access memory (RAM) and read-only memory (ROM) . The memory 404 may store computer-readable, computer-executable code including instructions that, when executed by the processor 402 cause the device 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. In some implementations, the code may not be directly executable by the processor 402 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 404 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.
[0100] The I / O controller 408 may manage input and output signals for the device 400. The I / O controller 408 may also manage peripherals not integrated into the device 400. In some implementations, the I / O controller 408 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 408 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 408 may be implemented as part of a processor, such as the processor 402. In some implementations, a user may interact with the device 400 via the I / O controller 408 or via hardware components controlled by the I / O controller 408.
[0101] In some implementations, the device 400 may include a single antenna 410. However, in some other implementations, the device 400 may have more than one antenna 410 (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 406 may communicate bi-directionally, via the one or more antennas 410, wired, or wireless links as described herein. For example, the transceiver 406 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 406 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 410 for transmission, and to demodulate packets received from the one or more antennas 410. The transceiver 406 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0102] 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 410 for transmitting the amplified signal into the air or wireless medium.
[0103] 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 410 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.
[0104] FIG. 5 illustrates an example of a processor 500 is suitable for implementing some embodiments of the present disclosure. The processor 500 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 500 may include a controller 502 configured to perform various operations in accordance with examples as described herein. The processor 500 may optionally include at least one memory 504. Additionally, or alternatively, the processor 500 may optionally include one or more arithmetic-logic units (ALUs) 506. 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) .
[0105] The processor 500 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 500) 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) .
[0106] The controller 502 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 500 to cause the processor 500 to support various operations in accordance with examples as described herein. For example, the controller 502 may operate as a control unit of the processor 500, generating control signals that manage the operation of various components of the processor 500. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0107] The controller 502 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 500 to support various operations in accordance with examples as described herein. The controller 502 may be configured to track memory address of instructions associated with the memory 504. The controller 502 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 502 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 500 to cause the processor 500 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 502 may be configured to manage flow of data within the processor 500. The controller 502 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 500.
[0108] The memory 504 may include one or more caches (e.g., memory local to or included in the processor 500 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 504 may reside within or on a processor chipset (e.g., local to the processor 500) . In some other implementations, the memory 504 may reside external to the processor chipset (e.g., remote to the processor 500) .
[0109] The memory 504 may store computer-readable, computer-executable code including instructions that, when executed by the processor 500, cause the processor 500 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 502 and / or the processor 500 may be configured to execute computer-readable instructions stored in the memory 404 to cause the processor 500 to perform various functions. For example, the processor 500 and / or the controller 502 may be coupled with or to the memory 404, the processor 500, the controller 502, and the memory 404 may be configured to perform various functions described herein. In some examples, the processor 500 may include multiple processors and the memory 504 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.
[0110] The one or more ALUs 506 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 506 may reside within or on a processor chipset (e.g., the processor 500) . In some other implementations, the one or more ALUs 506 may reside external to the processor chipset (e.g., the processor 500) . One or more ALUs 506 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 506 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 506 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 506 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 506 to handle conditional operations, comparisons, and bitwise operations.
[0111] The processor 500 may support wireless communication in accordance with examples as disclosed herein. The processor 500 may implemented at a UE 104. In this case, the processor 500 may be configured to operable to support means for receiving, from a network entity, a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding; and means for receiving, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0112] The processor 500 may implemented at a network entity 102, e.g. a base station. In this case, the processor 500 may be configured to operable to support means for transmitting, to a user equipment (UE) , a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding; and means for transmitting, to the UE, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
[0113] FIG. 6 illustrates a flowchart of a method 600 performed by a UE 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 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.
[0114] At 610, the method may include receiving, from a network entity, a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding. 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 UE 104 as described with reference to FIG. 1.
[0115] At 620, the method may include receiving, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission. 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 UE 104 as described with reference to FIG. 1.
[0116] FIG. 7 illustrates a flowchart of a method 700 performed by a network entity in accordance with aspects of the present disclosure. The operations of the method 700 may be implemented by a device or its components as described herein. For example, the operations of the method 700 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.
[0117] At 710, the method may include transmitting, to a user equipment (UE) , a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding. The operations of 710 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 710 may be performed by a network entity 102 as described with reference to FIG. 1.
[0118] At 720, the method may include transmitting, to the UE, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission. The operations of 720 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 720 may be performed by a network entity 102 as described with reference to FIG. 1.
[0119] 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.
[0120] 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.
[0121] 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.
[0122] 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.
[0123] 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.
[0124] 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 codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding; andreceive, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.2.The UE of claim 1, whereinfor the first configuration, the set of 3-port precoding matrices comprise non-coherent precoding matrices and partial-coherent precoding matrices, orfor the second configuration, the set of 3-port precoding matrices comprise the non-coherent precoding matrices, the partial-coherent precoding matrices and full-coherent precoding matrices.3.The UE of claim 2, wherein for the PUSCH transmission with a rank being 1,the partial-coherent precoding matrices comprise at least one of4.The UE of claim 2, wherein for the PUSCH transmission with a rank being 2,the partial-coherent precoding matrices comprise at least one of5.The UE of claim 2, wherein for the PUSCH transmission with a rank being 2,the partial-coherent precoding matrices comprise at least one of6.The UE of claim 2, wherein for the PUSCH transmission with a rank being 3,the partial-coherent precoding matrices comprise at least one of7.The UE of claim 2, wherein for the PUSCH transmission with a rank being 2,the partial-coherent precoding matrices comprise at least one of8.The UE of claim 2, wherein for the PUSCH transmission with a rank being 3,the partial-coherent precoding matrices comprise at least one of9.The UE of claim 2, wherein for the PUSCH transmission with a rank being 1,the full-coherent precoding matrices comprise at least one of10.The UE of claim 2, wherein for the PUSCH transmission with a rank being 2,the full-coherent precoding matrices comprise at least one of11.The UE of claim 2, wherein for the PUSCH transmission with a rank being 3,the full-coherent precoding matrices comprise at least one of12.The UE of claim 2, wherein the full-coherent precoding matrices comprise:at least one offor the PUSCH transmission with a rank being 1,at least one offor the rank being 2; andat least one offor the rank being 3.13.The UE of claim 1, whereinin a case that the maximum rank of the PUSCH transmission is larger than one, the TPMI field comprises five bits; orin a case that the maximum rank of the PUSCH transmission is one, the TPMI field comprises three bits for the first configuration or four bits for the second configuration.14.The UE of claim 1, wherein the DCI or the CG configuration further includes a second TPMI field indicative of a second 3-port precoding matrix and a second number of layers for the PUSCH transmission.15.The UE of claim 14, wherein in a case that the PUSCH is transmitted with a single frequency network (SFN) scheme or a time division multiplexing (TDM) scheme,if the maximum rank of the PUSCH transmission is larger than one, the second TPMI field comprises four bits, orif the maximum rank of the PUSCH transmission is being one, the second TPMI field comprises three bits for the first configuration or four bits for the second configuration.16.The UE of claim 14, in a case that the PUSCH is transmitted with a space division multiplexing (SDM) scheme,if the maximum rank of the PUSCH transmission is larger than one, the second TPMI field comprises five bits; orif the maximum rank of the PUSCH transmission is one, the second TPMI field comprises three bits for the first configuration or four bits for the second configuration.17.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 codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding; andtransmit, to the UE, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.18.The network entity of claim 17, whereinfor the first configuration, the set of 3-port precoding matrices comprise non-coherent precoding matrices and partial-coherent precoding matrices, orfor the second configuration, the set of 3-port precoding matrices comprise the non-coherent precoding matrices, the partial-coherent precoding matrices and full-coherent precoding matrices.19.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 codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding, andreceive, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.20.A method performed by a user equipment (UE) , the method comprising:receiving, from a network entity, a codebook subset configuration for a 3-port codebook based physical uplink shared channel (PUSCH) transmission, wherein the codebook subset configuration comprises one of a first configuration indicating support of partial-coherent precoding and non-coherent precoding or a second configuration indicating support of full-coherent precoding, partial-coherent precoding and non-coherent precoding, andreceiving, from the network entity, downlink control information (DCI) or a configured grant (CG) configuration including a transmitted precoding matrix indicator (TPMI) field indicative of a 3-port precoding matrix selected from a set of 3-port precoding matrices and a number of layers for the PUSCH transmission.
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