WO2017181345A1 - System and method for uplink subband beamforming - Google Patents

System and method for uplink subband beamforming Download PDF

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Publication number
WO2017181345A1
WO2017181345A1 PCT/CN2016/079677 CN2016079677W WO2017181345A1 WO 2017181345 A1 WO2017181345 A1 WO 2017181345A1 CN 2016079677 W CN2016079677 W CN 2016079677W WO 2017181345 A1 WO2017181345 A1 WO 2017181345A1
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WO
WIPO (PCT)
Prior art keywords
subband
pmi
processor
circuitry
instructions
Prior art date
Application number
PCT/CN2016/079677
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English (en)
French (fr)
Inventor
Yushu Zhang
Yuan Zhu
Kaiyue YAN
Wenting CHANG
Original Assignee
Intel IP Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Intel IP Corporation filed Critical Intel IP Corporation
Priority to CN202311264245.0A priority Critical patent/CN117176225A/zh
Priority to CN201680083775.7A priority patent/CN108781440B/zh
Priority to PCT/CN2016/079677 priority patent/WO2017181345A1/en
Publication of WO2017181345A1 publication Critical patent/WO2017181345A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI

Definitions

  • Wireless mobile communication technology uses various standards and protocols to provide telecommunication services to fixed or mobile subscribers, e.g., a base station and a wireless mobile device.
  • a base station may be an evolved Node Bs (eNode Bs or eNBs) that may communicate with the wireless mobile device, known as a user equipment (UE) .
  • eNode Bs or eNBs evolved Node Bs
  • UE user equipment
  • Figure 1 schematically illustrates a block diagram of an example wireless network in accordance with various embodiments
  • Figure 2 illustrates an example of a structure for an uplink physical channel in accordance with various embodiments
  • FIG. 3 schematically illustrates an example of an uplink resource grid in accordance with various embodiments
  • Figure 4 schematically illustrates a flow chart of one or more processes in accordance with various embodiments
  • Figure 5 schematically illustrates a flow chart of one or more processes in accordance with various embodiments
  • Figure 6 schematically illustrates a flow chart of one or more processes in accordance with various embodiments
  • FIG. 7 schematically illustrates an example of mobile devices in accordance with various embodiments
  • Figure 8 schematically illustrates an example of a mobile device in accordance with various embodiments
  • Figure 9 schematically illustrates an example of a UE device in accordance with various embodiments.
  • Embodiments of the invention may be implemented in hardware, firmware, software, or any combination thereof. Embodiments of the invention may also be implemented as instructions stored on a machine-readable medium, which may be read and executed by one or more processors.
  • a machine-readable medium may include any mechanism for storing or transmitting information in a form readable by a machine (e.g., a computing device, a mobile device, a smartphone, etc. ) .
  • a non-transitory machine-readable medium may include read only memory (ROM) ; random access memory (RAM) ; magnetic disk storage media; optical storage media; flash memory devices.
  • a transitory machine-readable medium may include electrical, optical, acoustical or other forms of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc. ) , and others.
  • module and/or “unit” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC) , an electronic circuit, a processor (shared, dedicated, or group) and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • radio systems may include, but are not limited to, network interface cards (NICs) , network adaptors, fixed or mobile client devices, relays, base stations, femtocells, gateways, bridges, hubs, routers, access points, or other network devices.
  • NICs network interface cards
  • network adaptors fixed or mobile client devices
  • relays base stations
  • femtocells gateways
  • bridges hubs
  • routers access points, or other network devices.
  • radio systems within the scope of the invention may be implemented in cellular radiotelephone systems, satellite systems, two-way radio systems as well as computing devices including such radio systems, e.g., personal computers, tablets and related peripherals, personal digital assistants, personal computing accessories, hand-held communication devices and all systems which may be related in nature and to which the principles of the inventive embodiments could be suitably applied.
  • computing devices including such radio systems, e.g., personal computers, tablets and related peripherals, personal digital assistants, personal computing accessories, hand-held communication devices and all systems which may be related in nature and to which the principles of the inventive embodiments could be suitably applied.
  • a transmission station may comprise a combination of an evolved universal terrestrial radio access network (E-UTRAN) Node Bs (also commonly denoted as evolved Node Bs, enhanced Node Bs, eNodeBs, or eNBs) , which may communicate with a wireless mobile device, known as a user equipment (UE) .
  • E-UTRAN evolved universal terrestrial radio access network
  • Node Bs also commonly denoted as evolved Node Bs, enhanced Node Bs, eNodeBs, or eNBs
  • a downlink transmission may comprise a communication from the transmission station (or eNodeB) to the wireless mobile device (or UE)
  • an uplink transmission may comprise a communication from the wireless mobile device to the transmission station.
  • Some embodiments may be used in conjunction with various devices and/or systems, for example, a UE, a mobile device, a mobile wireless device, a mobile communication device, a wireless station, a mobile station, a personal computer, a desktop computer, a mobile computer, a laptop computer, a netbook computer, a notebook computer, a tablet computer, a smartphone device, a mobile phone, a cellular phone, a server computer, a handheld computer, a handheld mobile device, a personal digital assistant (PDA) device, a handheld PDA device, an on-board device, an off-board device, a hybrid device, a vehicular device, a non-vehicular device, a mobile or portable device, a consumer device, a non-mobile or non-portable device, a wireless communication station, a wireless communication device, a wireless access point (AP) , a wireless node, a base station (BS) , a wired or wireless router, a wired or wireless modem, a video device, an
  • wireless communication network 100 may comprise a base station 110, e.g., an evolved Node B (eNB) , that may communicate with a mobile wireless device, e.g., UE 120.
  • eNB 110 may be a fixed station (e.g., a fixed node) or a mobile station/node.
  • the network 100 may comprise an access network of an access network of a 3GPP LTE network such as E-UTRAN, 3GPP LTE-Anetwork, 4G network, 4.5G network, a 5G network or any other future communication network, a WiMax cellular network, HSPA, Bluetooth, WiFi or other type of wireless access networks or any other future standards.
  • a 3GPP LTE network such as E-UTRAN, 3GPP LTE-Anetwork, 4G network, 4.5G network, a 5G network or any other future communication network, a WiMax cellular network, HSPA, Bluetooth, WiFi or other type of wireless access networks or any other future standards.
  • eNB 110 and/or UE 120 may support multiple-input and multiple-output (MIMO) communication with each other.
  • eNB 110 and/or UE 120 may comprise one or more antennas to utilize one or more radio resources of the wireless communication network 100.
  • eNB 110 and/or UE 120 may each comprise a set of one or more antennas to implement a multiple-input-multiple-output (MIMO) transmission/reception system.
  • MIMO multiple-input-multiple-output
  • the MIMO transmission/reception system may operate in a variety of MIMO modes, including single-user MIMO (SU-MIMO) , multi-user MIMO (MU-MIMO) , close loop MIMO, open loop MIMO, full-dimension MIMO (FD-MIMO) or variations of smart antenna processing.
  • SU-MIMO single-user MIMO
  • MU-MIMO multi-user MIMO
  • close loop MIMO open loop MIMO
  • full-dimension MIMO FD-MIMO
  • smart antenna processing eNB 110 may comprise one or more antennas 118 while UE 110 may comprise one or more antennas 128.
  • a FD-MIMO system may utilize a two-dimension (2D) planar antenna array structure.
  • the 2D planar antenna structure may place one or more antenna elements in two directions, e.g., in a vertical direction and/or a horizontal direction.
  • the 2D planar antenna array structure may have, e.g., eight or more antennas.
  • a total number of antennas in a 2D planar array structure may exceed, e.g., eight, and more (e.g., 16, 32, 64, 128, etc. receiving antenna ports may be used.
  • the increased total number of receiving antennas in the 2D structure and the increased number of receiving antenna ports may result in higher MU-MIMO dimension.
  • higher MU-MIMO degree with a development of receiving antenna ports number may bring a higher performance, e.g., higher user spectrum efficiency.
  • UE 110 may communicate using orthogonal frequency division multiple access (OFDMA) and/or single-carrier frequency division multiple access (SC-FDMA) .
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • a symmetric downlink/uplink waveform may be used for, e.g., a 5G system that may have a carrier frequency, e.g., below 30GHz, etc.
  • a single carrier waveform maybe used for a 5G system that may have a carrier frequency, e.g., above 30GHz, etc., based on design flexibility of Orthogonal Frequency Division Multiple Access (OFDMA) .
  • OFDMA Orthogonal Frequency Division Multiple Access
  • symmetric downlink/uplink waveforms may be used in a 5G system with a carrier frequency above, e.g., 6 GHz, etc.
  • a single carrier waveform may be used in a 5G system with a carrier frequency below, e.g., 6 GHz, etc.
  • MIMO may be used to provide coverage, e.g., at a high frequency band.
  • beamforming accuracy may impact an effectivity of a channel, e.g., a small delay spread under a good beam.
  • an eNB side analog beamforming may reduce a delay spread of an effective channel at high frequency band. In some embodiments, the delay spread may be increased with eNB side analog beamforming.
  • channel frequency selectivity may relate to receiving analog beamforming weights.
  • a subband beamforming may be used to achieve a system level performance with a higher gain with regard to wideband beamforming.
  • different digital precoders may be used in different subbands to increase uplink performance.
  • UE 120 may generate an uplink precoder based on uplink codebook and/or precoding information bits in Downlink Control Indicator (DCI) .
  • the one or more bits in the precoding information may be used to indicate a Precoder Matrix Indicator (PMI) and/or Rank Indicator (RI) .
  • PMI Precoder Matrix Indicator
  • RI Rank Indicator
  • UE may use a wideband precoder for a PMI and RI pair in a DCI.
  • UE 120 may use a new Transmission Mode (TM) for subband beamforming.
  • the new TM may be configured by eNB 110 via RRC signaling.
  • a size of each subband may be the same in the whole system or may be configured by eNB 110 via RRC signaling.
  • an example of a subband size may be described in Table 7.2.3-1 of TS 36.213.
  • eNB 120 may not explicitly indicate a precoding matrix indicator (PMI) for UE 120, e.g., subband PMI in the new TM.
  • eNB 110 with, e.g., more than two antenna ports may configure or include rank indication (RI) information in downlink control information (DCI) .
  • UE 120 may calculate the uplink beamforming weight.
  • PMI precoding matrix indicator
  • eNB 110 may include a controller 114.
  • the controller 114 may be coupled with a transmitter 112 and a receiver 116 and/or one or more communications modules or units in eNB 110.
  • the transmitter 112 and/or the receiver 116 may be elements or modules of a transceiver.
  • the transmitter 112 and/or the receiver 116 may be coupled with the one or more antennas 118 to communicate with UE 120.
  • UE 120 may comprise a transmitter 122 and a receiver 126 and/or one or more communications modules or units.
  • the transmitter 122 and/or the receiver 126 may communicate with a base station (BS) , e.g., eNB 110 or other type of wireless access point such as wide area network (WWAN) via one or more antennas 128 of the UE 120.
  • BS base station
  • WWAN wide area network
  • eNB 110 may comprise other hardware, software and/or firmware components, e.g., a memory, a storage, an input module, an output module, one or more radio modules and/or one or more digital modules, and/or other components.
  • Transmitter 112 may be configured to transmit signals to UE 120 via one or more antennas 118.
  • Receiver 116 may be configured to receive signals from UE 120 via one or more antennas 118.
  • the transmitter 112 and/or the receiver 116 may be elements or modules of a transceiver circuitry.
  • controller 114 may control one or more functionalities of eNB 110 and/or control one or more communications performed by eNB 110.
  • controller 114 may execute instructions of software and/or firmware, e.g., of an operating system (OS) of eNB 110 and/or of one or more applications.
  • Controller 114 may comprise or may be implemented using suitable circuitry, e.g., controller circuitry, configuration circuitry, baseband circuitry, scheduler circuitry, processor circuitry, memory circuitry, and/or any other circuitry, which may be configured to perform at least part of the functionality of controller 114.
  • one or more functionalities of controller 114 may be implemented by logic, which may be executed by a machine and/or one or more processors.
  • UE 120 may communicate using one or more wireless communication standards including 3GPP LTE, worldwide interoperability for microwave access (WiMAX) , high speed packet access (HSPA) , Bluetooth, WiFi, 5G standard and/or other wireless standards or future wireless standards.
  • UE 120 may communicate via separate antenna (s) for each wireless communication standard or shared antenna (s) for multiple wireless communication standards.
  • UE 120 may communicate in a wireless local area network (WLAN) , a wireless personal area network (WPAN) , and/or a wireless wide area network (WWAN) or other network.
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • WWAN wireless wide area network
  • UE 120 may comprise a controller 124, a transmitter 122, a receiver 124 and one or more antennas 128.
  • UE 120 may comprise other hardware components, software components and/or firmware components, e.g., a memory, a storage, an input unit, an output unit and/or any other components.
  • Transmitter 122 may transmit signals to eNB 110 via one or more antennas 128.
  • Receiver 124 may receive signals from eNB 110 via one or more antennas 128.
  • the transmitter 122 and/or the receiver 126 may be elements or modules of a transceiver.
  • controller 124 may be coupled to receiver 124 and transmitter 122. In some embodiments, controller 124 may control one or more functionalities of UE 120 and/or control one or more communications performed by UE 120. In some embodiments, controller 124 may execute instructions of software and/or firmware, e.g., of an operating system (OS) of UE 120 and/or of one or more applications. Controller 124 may comprise or may be implemented using suitable circuitry, e.g., controller circuitry, scheduler circuitry, processor circuitry, memory circuitry, and/or any other circuitry, which may be configured to perform at least part of the functionality of controller 12. In some embodiments, one or more functionalities of controller 124 may be implemented by logic, which may be executed by a machine and/or one or more processors.
  • OS operating system
  • controller 124 may comprise a central processing unit (CPU) , a digital signal processor (DSP) , a graphic processing unit (GPU) , one or more processor cores, a single-core processor, a dual-core processor, a multiple-core processor, a microprocessor, a host processor, a controller, a plurality of processors or controllers, a chip, a microchip, one or more circuits, circuitry, a baseband circuitry, a configuration circuitry, a radio frequency (RF) circuitry, a logic unit, an integrated circuit (IC) , an application-specific IC (ASIC) , or any other suitable multi-purpose or specific processor or controller and/or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • GPU graphic processing unit
  • Transmitter 112 may comprise, or may be coupled with one or more antennas 118 of eNB 110 to communicate wirelessly with other components of the wireless communication network 100, e.g., UE 120.
  • Transmitter 122 may comprise, or may be coupled with one or more antennas 128 of UE 120 to communicate wirelessly with other components of the wireless communication network 100, e.g., eNB 110.
  • transmitter 112 and/or transmitter 122 may each comprise one or more transmitters, one or more receivers, one or more transmitters, one or more receivers and/or one or more transceivers that may send and/or receive wireless communication signals, radio frequency (RF) signals, frames, blocks, transmission streams, packets, messages, data items, data, information and/or any other signals.
  • RF radio frequency
  • the antennas 118 and/or the antennas 128 may comprise any type of antennas suitable to transmit and/or receive wireless communication signals, RF signals, blocks, frames, transmission streams, packets, messages, data items and/or data.
  • the antennas 118 and/or the antennas 128 may comprise any suitable configuration, structure and/or arrangement of one or more antenna elements, components, units, assemblies and/or arrays.
  • the antennas 118 and/or the antennas 128 may implement transmit and/or receive functionalities using separate transmit and/or receive antenna elements.
  • the antennas 118 and/or the antennas 128 may implement transmit and/or receive functionalities using common and/or integrated transmit/receive elements.
  • the antenna may comprise, for example, a phased array antenna, a single element antenna, a dipole antenna, a set of switched beam antennas, and/or the like.
  • Fig. 1 illustrates some components of eNB 110
  • the eNB 110 may optionally comprise other suitable hardware, software and/or firmware components that may be interconnected or operably associated with one or more components in the eNB 110.
  • Fig. 1 illustrates some components of UE 120
  • UE 120 may comprise other suitable hardware, software and/or firmware components that may be interconnected or operably associated with one or more components in UE 120.
  • eNB 110 and/or UE 120 may comprise one or more radio modules (not shown) to modulate and/or demodulate signals transmitted or received on an air interface, and one or more digital modules (not shown) to process signals transmitted and received on the air interface.
  • eNB 110 and/or UE 120 may comprise one or more input units (not shown) and/or one or more output units (not shown) .
  • one or more input units may comprise a keyboard, a keypad, a mouse, a touch-screen, a touch-pad, a track-ball, a stylus, a microphone, or any other pointing/input unit or device.
  • one or more output units may comprise a monitor, a screen, a touch-screen, a flat panel display, a Cathode Ray Tube (CRT) display unit, a Liquid Crystal Display (LCD) display unit, a plasma display unit, one or more audio speakers or earphones, or any other output unit or device.
  • CTR Cathode Ray Tube
  • LCD Liquid Crystal Display
  • UE 120 may comprise, for example, a mobile computer, a mobile device, a station, a laptop computing device, a notebook computing device, a netbook, a tablet computing device, an Ultrabook TM computing device, a handheld computing device, a handheld device, a storage device, a PDA device, a handheld PDA device, an on-board device, an off-board device, a hybrid device (e.g., combining cellular phone functionalities with PDA device functionalities) , a consumer device, a vehicular device, a non-vehicular device, a mobile or portable device, a mobile phone, a cellular telephone, a PCS device, a mobile or portable GPS device, a DVB device, a wearable device, a relatively small computing device, a non-desktop computer, a “carry small live large” (CSLL) device, an ultra mobile device (UMD) , an ultra mobile PC (UMPC) , a mobile internet device (MID) , an “O”
  • eNB 110 and/or UE 120 may each comprise one or more radio modules or units (not shown) that may modulate and/or demodulate signals transmitted or received on an air interface, and/or one or more digital modules or units (not shown) that may process signals transmitted and received on the air interface.
  • Figure 2 schematically illustrates an example of a block diagram of a wireless communication device.
  • the wireless communication device may be configured to process a baseband signal that may represent a physical uplink shared channel (PUSCH) according to various embodiments.
  • a coder may code a signal that may represent the PUSCH to generate coded bits.
  • 3GPP LTE specification may outline some coding process.
  • a multiplexer may be configured to multiplex the coded bits for the PUSCH to generate a block of data, e.g., one or more codewords 220.
  • a size of the block of data may match an amount of REs that can be used by the PUSCH.
  • a scrambler or other scrambling module 202 may scramble the coded bits in the codeword 220 to be transmitted on the PUSCH.
  • a modulating mapper 204 or a modulator or other modulating module may modulate (204) the scrambled bits in the codeword 220.
  • quadrature phase shift keying (QPSK) quadrature phase shift keying
  • BPSK bi-phase shift keying
  • 32-QAM 32-QAM
  • 64-QAM 64-QAM
  • 256-QAM 256-QAM
  • other types of modulation may be used to create a block of one or more complex-valued modulation symbols.
  • a layer mapper 206 or other layer mapping module may map (206) onto one or more transmission layers one or more complex symbols for a codeword 220 to be transmitted on the PUSCH.
  • a number of the layers may be, e.g., based on that of transmission antenna ports used at an eNB and/or a UE. For example, a single layer may be used for transmission on an antenna port. For another example, a number of layers may be less than or the same as that of antenna ports for transmission of the PUSCH, e.g., for spatial multiplexing.
  • a precoder 208 or other precoding module may precode one or more complex-valued modulation symbols on a layer to generate an output for transmission on one or more corresponding antenna ports for the layer.
  • precoding for transmission diversity or spatial multiplexing may be performed for a UE with, e.g., two or four antenna ports based on 3GPP LTE Rel. 8 specification or a UE with other number of antenna ports, e.g., eight or more.
  • a resource mapper 210 or other resource mapping module may map one or more complex valued modulation symbols corresponding to the antenna port to one or more resource elements (REs) .
  • the resource mapped complex-valued symbols may be sent to a corresponding antenna port of the UE for transmission.
  • Figure 2 illustrates a sequence of one or more processing for PUSCH
  • other processing or order of processing may be used.
  • a time-domain orthogonal frequency-division multiplexing (OFDM) signal may be generated from the resource mapped complex-valued symbols for transmission on each antenna port.
  • the one or more components modules for the processing for PUSCH may be used in the controller 124 of UE 120.
  • communication of data on PUSCH may be controlled via a control channel, referred to as a physical downlink control channel (PDCCH) .
  • a resource unit for uplink transmissions may be denoted as a resource element (RE) .
  • uplink control information (UCI) may be transmitted on physical downlink control channel (PUCCH) or PUSCH.
  • PUCCH physical downlink control channel
  • PUSCH transport resource allocation may be used.
  • scheduling may be used.
  • PUSCH may have a higher priority for UCI than PUCCH. For example, UCI may be transmitted via PUCCH if the PUSCH may not have a scheduled resource for UCI. Otherwise, PUSCH may be used for UCI transmission.
  • uplink control information may comprise information on resource allocations or scheduling related to uplink resource assignments on the PDCCH, uplink resource grants, or uplink power control commands and/or other control information.
  • PUCCH may support one or more formats, e.g., format 1, 1a, 1b, 2, 2a, 2b, 3 or other formats that may be created to carry corresponding uplink control information. While Figure 2 illustrates some embodiment for a PUSCH, other embodiments may use xPUSCH in a 5G system.
  • UCI may be transmitted in PUCCH or PUSCH.
  • transport resource allocation may be used.
  • scheduling based method may be used.
  • PUSCH may have a higher priority than PUCCH. If there is no scheduled resource for UCI transmission, UE may transmit UCI via PUCCH, otherwise, PUSCH may be used.
  • Figure 3 illustrates a diagram of an uplink resource grid structure according to an embodiment.
  • a signal transmitted in a slot may be described by a resource grid 300 of subcarriers and single-carrier frequency division multiple access (SC-FDMA) symbols, wherein may represent uplink transmission bandwidth configured in a cell, e.g., a number of resource blocks in the slot, may represent a number of subcarriers in the slot, and may represent a number of SC-FDMA symbols in the slot.
  • FIG 3 illustrate a radio frame with a duration T f of, e.g., 10 milliseconds (ms)
  • a radio frame may have a different duration.
  • a radio frame may be segmented or divided into one or more subframes that may each have a duration of, e.g., 1 ms.
  • a subframe may be further subdivided into two slots, each with a duration T slot of, e.g., 0.5 ms.
  • Figure 3 illustrates an example of an uplink slot 310 with a duration of T slot .
  • uplink transmissions may be scheduled in larger units such as resource blocks 320.
  • a physical resource block 320 may comprise a number of SC-FDMA symbols in time domain and a number of subcarriers in frequency domain.
  • a physical resource block 320 may comprise, e.g., 12-15 kHz subcarriers and, e.g., 7 SC-FDMA symbols per subcarrier, e.g., for short or normal cyclic prefix.
  • a resource block 320 may use six SC-FDMA symbols for an extended cyclic prefix.
  • a resource block 320 may comprise a different number of subcarriers or symbols.
  • an element in a resource grid 300 may be called as a resource element 330.
  • a resource element 330 may be the smallest resource unit for uplink transmission.
  • a physical resource block 320 in the uplink may comprise REs 330 that may correspond to a slot, e.g., 0.5 ms in the time domain and, e.g., 180 kHz in the frequency domain.
  • the resource block 320 may be mapped to, e.g., 84 REs (REs) 330 using short or normal cyclic prefixing or, e.g., 72 REs (not shown) using extended cyclic prefixing.
  • a resource block 320 may be mapped to a different number of REs.
  • a resource element 330 may be identified by an index pair (k, l) in a slot, where is the index in the frequency and is the index in the time domain.
  • a resource element 330 may transmit, e.g., two bits of information for QPSK.
  • a number of one or more bits communicated per resource element 330 may depend on other types of modulation, e.g., BPSK, 16 16-QAM, 32-QAM, 64-QAM, 256-QAM, and/or other types of modulation.
  • Figure 4 illustrates an example of one or more processes in accordance with some embodiments.
  • the one or more processes may be used in a UE subband beamforming procedure.
  • eNB 110 may not select and/or indicate a subband precoder. In some other embodiments, eNB 110 may select and/or indicate a subband precoder. In some embodiments, the one or more process may be used to design uplink subband beamforming.
  • UE 120 may select N subcarriers of one subband, wherein N may represent a number of subcarrier in the subband. The UE 120 may obtain the beamforming weight based on a number of the selected subcarriers within the subband.
  • UE 120 may use a new Transmission Mode (TM) for subband beamforming.
  • the new TM may be configured via RRC signaling.
  • a size of each subband may be the same in the whole system or may be configured by eNB 20 via RRC signaling. For example, an example of a subband size may be described in Table 7.2.3-1 of 3GPP TS 36.213.
  • eNB 120 may not explicitly indicate a precoding matrix indicator (PMI) for UE 120, e.g., subband PMI in the new TM.
  • PMI precoding matrix indicator
  • eNB 110 with, e.g., more than two antenna ports may include rank indication (RI) information in downlink control information (DCI) .
  • DCI downlink control information
  • eNB 110 may explicitly indicate the rank of precoder by an uplink grant.
  • UE 120 may calculate an uplink beamforming weight. In some embodiments, an example for beamforming weight calculation may be described below.
  • UE 120 may send a sounding reference signal (SRS) to eNB 120.
  • SRS sounding reference signal
  • eNB 110 may estimate a beamforming weight, a rank and/or a channel quality indication (CQI) , e.g., based on the received SRS.
  • CQI channel quality indication
  • eNB 110 may determine RI based on the matrix S in Equation (1) , wherein the matrix S may be calculated by subcarriers in the whole band.
  • eNB 110 may obtain an uplink channel.
  • the eNB 110 may estimate an uplink channel based on the SRS. For example, eNB 110 may estimate a possible beamforming weight that UE 120 may use to transmit for each subband.
  • the eNB 110 may decide an uplink modulation and coding scheme (MCS) based on the estimated beamforming weight.
  • MCS uplink modulation and coding scheme
  • eNB 110 may transmit a cell-specific reference signal (CRS) and/or a channel state information reference signal (CSI-RS) to UE 120.
  • CRS cell-specific reference signal
  • CSI-RS channel state information reference signal
  • UE 120 may measure a subband beamforming weight.
  • UE 120 may estimate a downlink channel based on CRS and/or CSI-RS. If a transmission analog beamforming weight and a receiving analog beamforming weight are the same in eNB 110, a subspace between an uplink channel and a downlink channel may be similar. In some embodiments, UE 120 may estimate a subband beamforming weight based on a configured rank and/or MCS in the uplink grant and/or a downlink channel estimated from CRS or CSI-RS.
  • eNB 110 may transmit an uplink grant with a rank indication (RI) and/or a modulation and coding scheme (MCS) to UE 110.
  • eNB 110 may determine the uplink MCS based on the estimated beaming forming weight, e.g., obtained at 404.
  • UE 120 may select an uplink beamforming weight for each subband based on the received RI and/or MCS, e.g., estimated at 404. In some embodiments, UE 120 may select the beamforming weight for each subband to provide a subband precoder.
  • N may indicate a number of subcarriers for one subband.
  • UE 120 may select the subcarriers within the subband to obtain the subband beamforming weight.
  • UE 120 may select N subcarriers of one subband, wherein N may represent a number of subcarrier in the subband.
  • the UE 120 may obtain the beamforming weight based on a number of the selected subcarriers within the subband.
  • a beamforming weight may be achieved by Eigen Based Beamforming (EBB) , e.g., Equation (1) .
  • EBB Eigen Based Beamforming
  • H i may indicate a N rx ⁇ N tx estimated channel matrix at a subcarrier i in a current subband
  • N may represent a number of subcarriers for an estimated channel
  • N rx may represent a number of receiving antenna ports
  • N tx may represent a number of transmission antenna ports.
  • N may represent a number of one or more subcarriers for a subband.
  • UE 120 may select a number of one or more subcarriers within a subband to obtain the beamforming weight.
  • UE 120 may select a first R columns of the matrix V as a beamforming weight for a current subband, wherein R may be indicated by RI in DCI. For example, R may equal to RI+1.
  • UE 120 may select N subcarriers of one subband, wherein N may represent a number of subcarrier in the subband.
  • the UE 120 may obtain the beamforming weight based on a number of the selected subcarriers within the subband.
  • a receiving analog beamforming weight and transmission analog beamforming weight may be the same.
  • UE 120 may send to eNB 110 a physical uplink shared channel (PUSCH) with the subband beamforming, e.g., selected at 412. For example, UE 120 may send to eNB 110 the PUSCH with the selected subband weight for each subband.
  • PUSCH physical uplink shared channel
  • UE 120 may send a SRS to eNB 110.
  • FIG. 5 illustrates an example of one or more processes in accordance with some embodiments.
  • eNB 110 may explicitly indicate a PMI for UE 120.
  • the eNB 110 may transmit the subband PMI and/or RI associated with PDSCH.
  • eNB 110 may transmit the subband PMI of each RI associated with PDSCH.
  • eNB 110 may transmit a periodical subband PMI periodically. For example, for the periodical mode, eNB 110 may configure a period and/or a subframe offset via RRC signaling and/or to be the same as a SRS period configuration.
  • eNB 110 may not select and/or indicate a subband precoder. In some other embodiments, eNB 110 may select and/or indicate a subband precoder. In some embodiments, the one or more process of Figure 5 may be used to design an uplink subband beamforming. In some embodiments, for each uplink transmission, eNB 110 may explicitly indicate a rank of precoder by an uplink grant.
  • UE 120 may send a SRS to the eNB 110.
  • eNB 110 may estimate a RI, a subband PMI and/or CQI, e.g., based on the received SRS from UE 120. In some embodiments, eNB 110 may determine RI based on the matrix S that may be calculated based on a number of subcarriers in the whole band. In some embodiment, eNB 110 may estimate the subband PMI that may be equal to the first RI+1 columns of the matrix V that may be calculated by a number of subcarriers in the subband.
  • eNB 110 may transmit to UE 120 a Physical Downlink Shared Channel (PDSCH) with a periodical subband PMI, e.g., the estimated subband PMI at 504. For example, eNB 110 may transmit the estimated subband PMI bits periodically.
  • PDSCH Physical Downlink Shared Channel
  • eNB 110 may transmit the subband PMI and/or the RI, e.g., obtained at 504, associated with the PDSCH. In some other embodiments, for a subband PMI transmission, eNB 110 may transmit the subband PMI of each RI associated with the PDSCH. In some embodiments, eNB 110 may transmit the estimated subband PMI of each estimated RI associated with the PDSCH.
  • the subband PMI and PDSCH resource mapping may be similar to uplink control indicator (UCI) and PUSCH resource mapping.
  • the subband PMI may be mapped around a UE specific Reference Signal (UE-RS) and/or may use different channel coding and modulation schemes.
  • UE-RS UE specific Reference Signal
  • eNB 110 may transmit an uplink grant with a RI and/or a MCS. For example, for each uplink transmission, eNB 110 may indicate a rank of the precoder explicitly by the uplink grant. For example, eNB may transmit the RI and/or the MCS, e.g., estimated at 504.
  • UE 120 may select a beamforming weight for each subband based on the received RI and/or the received subband PMI.
  • UE 120 may select a beamforming weight for each subband, e.g., based on Equation (1) .
  • UE 120 may select the beamforming weight for each subband to provide a subband precoder.
  • UE 120 may select one or more subcarriers in a subband, e.g., based on Equation (1) , to calculate the beamforming weight for the subband. For example, in equation (1) , UE 120 may select N subcarriers of one subband, wherein N may represent a number of subcarrier in the subband. The UE 120 may obtain the beamforming weight based on a number of the selected subcarriers within the subband.
  • UE 120 may send a PUSCH with the obtained subband precoder to eNB 110.
  • UE 120 may send a SRS to eNB 110.
  • eNB 110 may estimate, e.g., for each subband, a beamforming weight, a rank and/or a CQI based on SRS from UE 120.
  • eNB 110 may transmit a PDSCH with a periodical subband PMI, e.g., obtained at 516, to UE 120.
  • eNB 110 may transmit a PDSCH with a subband PMI to UE 120 periodically.
  • Figure 6 illustrates an example of one or more processes in accordance with some embodiments.
  • eNB 110 may explicitly indicate a PMI for UE 120.
  • the eNB 110 may transmit the subband PMI and/or RI associated with PDSCH.
  • eNB 110 may transmit the subband PMI of each RI associated with PDSCH.
  • eNB 110 may transmit the subband PMI aperiodically.
  • eNB 110 may configure or explicitly indicate in a downlink assignment the subband PMI bits transmission, e.g., by a trigger of 1 bit or more bits.
  • eNB 110 may transmit the subband PMI aperiodically in response to detecting that an uplink precoder, e.g., a RI and/or a subband PMI, may be changed.
  • the eNB 110 may configure or explicitly indicate in a downlink assignment the trigger to initiate the subband PMI bits transmission.
  • eNB 110 may not select and/or indicate a subband precoder. In some other embodiments, eNB 110 may select and/or indicate a subband precoder. In some embodiments, the one or more processes of Figure 6 may be used to design an uplink subband beamforming. In some embodiments, for each uplink transmission, eNB 110 may explicitly indicate a rank of precoder by an uplink grant.
  • UE 120 may send a SRS to the eNB 110.
  • eNB 110 may estimate a RI, a subband PMI and/or CQI, e.g., based on the received SRS from UE 120. In some embodiments, eNB 110 may determine RI based on the matrix S that may be calculated based on a number of subcarriers in the whole band. In some embodiment, eNB 110 may estimate the subband PMI that may be equal to the first RI+1 columns of the matrix V that may be calculated by a number of subcarrier in the subband.
  • eNB 110 may transmit to UE 120 a Physical Downlink Shared Channel (PDSCH) with an aperiodical subband PMI, e.g., in response to obtaining the estimated subband PMI at 604. For example, eNB 110 may transmit the subband PMI bits aperiodically.
  • PDSCH Physical Downlink Shared Channel
  • eNB 110 may transmit the subband PMI and/or the RI, e.g., obtained at 604, associated with the PDSCH. In some other embodiments, for a subband PMI transmission, eNB 110 may transmit the subband PMI of each RI associated with the PDSCH, e.g., at 606.
  • the subband PMI and PDSCH resource mapping may be similar to uplink control indicator (UCI) and PUSCH resource mapping.
  • the subband PMI may be mapped around a UE specific Reference Signal (UE-RS) and/or may use different channel coding and modulation schemes.
  • UE-RS UE specific Reference Signal
  • eNB 110 may transmit an uplink grant with a RI and/or a MCS, e.g., obtained at 604. For example, for each uplink transmission, eNB 110 may indicate a rank of the precoder explicitly by the uplink grant.
  • UE 120 may select a beamforming weight for each subband based on the received RI and/or the received subband PMI, e.g., obtained at 604.
  • UE 120 may select a beamforming weight for each subband, e.g., based on Equation (1) .
  • UE 120 may obtain a subband precoder based on the select the beamforming weight for each subband.
  • UE 120 may select one or more subcarriers in a subband, e.g., based on Equation (1) to calculate the beamforming weight for the subband.
  • UE 120 may select N subcarriers of one subband, wherein N may represent a number of subcarrier in the subband.
  • the UE 120 may obtain the beamforming weight based on a number of the selected subcarriers within the subband.
  • UE 120 may send a PUSCH with the obtained subband precoder to eNB 110.
  • UE 120 may send a SRS to eNB 110.
  • eNB 110 may estimate RI, subband PMI and/or CQI. The eNB 110 may compare the estimated RI with an estimated RI obtained at 604 to detect whether the two estimated RI are different. Similarly, eNB 110 may compare the subband PMI estimated at 616 and an subband PMI estimated at 604 to detect a subband PMI change. The eNB 110 may detect whether the uplink precoder may be changed aperiodically. In some embodiments, eNB 110 may detect if the RI change and/or the subband PMI changes.
  • eNB 110 may transmit a PDSCH with the subband PMI to UE 120 aperiodically, e.g., in response to detecting, e.g., at 616, a change in the RI and/or the subband PMI.
  • two clusters of continuous resource blocks may be scheduled for a UE, e.g., 120, in a resource allocation type 1.
  • a subband PMI may be used to indicate the precoding information of each cluster.
  • an uplink grant may include, e.g., two PMIs.
  • a first PMI may indicate a precoder of a first cluster and a second PMI may indicate a precoder of a second cluster.
  • one or more clusters of continuous or uncontinuous RBs may be scheduled for UE 120 in other resource allocation type.
  • a number of subband PMIs may be associated with a number of clusters of continuous RBs.
  • a maximum number of subband precoder may be no more than a maximum number of RB clusters in resource allocation type 1.
  • the uplink grant may use a precoding information indicator to indicate the precoding information for each cluster corresponding to a number of antenna ports.
  • a precoding information indicator For example, Table 1 illustrates an example of a precoding information indication for, e.g., two antenna ports and Table 2 illustrates an example of a precoding information indication for, e.g., four antenna ports.
  • a subband PMI may indicate a PMI in an RB cluster.
  • TPMI1 may denote a PMI value of a first RB cluster and TPMI2 may denote a PMI value of a second RB cluster.
  • the two RB clusters may use one precoder, e.g., TPMI for 2 layers may be set to 0, e.g., based on a codebook used in 3GPP.
  • the bit fields 1-63 may be reserved for a future extension of the codebook.
  • Table 1 example for content of precoding information field (s) for 2 antenna ports
  • Table 1 illustrates an example of precoding information field (s) for, e.g., 2 antenna ports. In some embodiments, other precoding information field (s) may be used for e.g., 4 antenna ports, etc.
  • Figure 7 schematically illustrate an example of a mobile device in accordance with some embodiments.
  • the mobile device may be implemented as a UE, e.g., 120.
  • UE 700 may be implemented in an entity, an apparatus, a device, a system, a circuitry and/or any other structure using any suitably configured hardware, software and/or firmware.
  • UE 700 may be configured to perform one or more processes and/or functions as described with regard to UE 122 in the disclosure.
  • UE 700 may include one or more interfaces to interface between UE 700 and one or more other elements in a network.
  • UE 700 may comprise a processor 704 and/or a memory 706 that may be coupled with each other. UE 700 may further comprise one or more other suitable hardware components and/or software and/or firmware components. In some embodiments, some or all of the components of UE 700 may be enclosed in a housing or packaging, and may be interconnected or operably associated using one or more wired or wireless links. In other embodiments, components of UE 700 may be distributed among multiple or separate devices.
  • processor 704 may include, for example, a central processing unit (CPU) , a digital signal processor (DSP) , a graphic processing unit (GPU) , one or more processor cores, a single-core processor, a dual-core processor, a multiple-core processor, a microprocessor, a host processor, a controller, a plurality of processors or controllers, a chip, a microchip, one or more circuits, controller circuitry, a logic unit, a baseband circuitry, a radio frequency (RF) circuitry, a logic unit, an integrated circuit (IC) , scheduler circuitry, processor circuitry, memory circuitry, an application-specific IC (ASIC) , a processor (shared, dedicated, or group) , or any other suitable multi-purpose or specific processor or controller, or one or more circuits or circuitry, and/or any combination thereof, or any other suitable hardware, software and/or firmware components.
  • CPU central processing unit
  • DSP digital signal processor
  • GPU graphic processing unit
  • Processor 704 may execute instructions, for example, of an operating system (OS) of UE 700 and/or of one or more suitable applications.
  • OS operating system
  • some or all of the components of UE 700 may be enclosed in a common device and may be interconnected or operably associated using one or more wired or wireless links.
  • components of UE 700 may be distributed among multiple or separate devices.
  • memory 706 may include, for example, a random access memory (RAM) , a read only memory (ROM) , a dynamic RAM (DRAM) , a synchronous DRAM (SD-RAM) , a flash memory, a volatile memory, a non-volatile memory, a cache memory, a buffer, a short term memory unit, a long term memory unit, or other suitable memory units or storage units.
  • RAM random access memory
  • ROM read only memory
  • DRAM dynamic RAM
  • SD-RAM synchronous DRAM
  • flash memory a volatile memory
  • non-volatile memory a cache memory
  • buffer a buffer
  • short term memory unit a long term memory unit
  • UE 700 may comprise a subband beamforming weight measurement module or unit 708 that may be coupled to any other component in UE 700.
  • subband beamforming weight measurement module 708 may be configured to measure a subband beamforming weight, e.g., based on CRS and/or CSI-RS or other subband beamforming weight related information, e.g., as described with regard to 408.
  • UE 700 may comprise a subband beamforming weight selection module or unit 710 that may be coupled to any other component in UE 700.
  • subband beamforming weight selection module 710 may be configured to select a subband beamforming weight based on, e.g., RI and/or subband PMI, and/or other subband beamforming weight related information, as described with regard to 412, 510 or 610.
  • the subband beamforming weight measurement module 708 and/or subband beamforming weight selection module 710 may be configured to perform one or more processes and/or functions, e.g., as described with regard to UE 120 and/or other embodiments in the disclosure.
  • the transceiver 702 may be configured to transmit and/or receive one or more signalling to and from eNB 110, e.g., as described with regard to Figures 4 to 6.
  • Figure 7 illustrates the subband beamforming weight measurement module 708 and/or subband beamforming weight selection module 710 may be provided in UE 700, in some other embodiments, the subband beamforming weight measurement module 708 and/or subband beamforming weight selection module 710 may be provided in or implemented by one or more processors, controllers or a baseband circuitry. While Figure 7 illustrates the transceiver 702, in some embodiments, the transceiver 702 may be implemented by one or more transmitters and/or one or more receivers.
  • Figure 8 illustrates an example of a mobile device in accordance with some embodiment.
  • the mobile device may comprise a base station, e.g., eNB.
  • eNB 800 may be implemented in an entity, an apparatus, a device, a system, a circuitry and/or any other structure using any suitably configured hardware, software and/or firmware.
  • eNB 800 may be configured to perform one or more processes and/or functions as described with regard to eNB 110 in the disclosure.
  • eNB 800 may comprise a processor 804 and/or a memory 806 that may be coupled with each other.
  • the eNB 800 may further comprise one or more other suitable hardware components and/or software and/or firmware components.
  • some or all of the components of eNB 800 may be enclosed in a housing or packaging, and may be interconnected or operably associated using one or more wired or wireless links.
  • components of eNB 800 may be distributed among multiple or separate devices.
  • processor 804 may include, for example, a central processing unit (CPU) , a digital signal processor (DSP) , a graphic processing unit (GPU) , one or more processor cores, a single-core processor, a dual-core processor, a multiple-core processor, a microprocessor, a host processor, a controller, a plurality of processors or controllers, a chip, a microchip, one or more circuits, controller circuitry, a logic unit, a baseband circuitry, a radio frequency (RF) circuitry, a logic unit, an integrated circuit (IC) , scheduler circuitry, processor circuitry, memory circuitry, an application-specific IC (ASIC) , a processor (shared, dedicated, or group) , or any other suitable multi-purpose or specific processor or controller, or one or more circuits or circuitry, and/or any combination thereof, or any other suitable hardware, software and/or firmware components.
  • CPU central processing unit
  • DSP digital signal processor
  • GPU graphic processing unit
  • Processor 804 may execute instructions, for example, of an operating system (OS) of eNB 800 and/or of one or more suitable applications.
  • OS operating system
  • some or all of the components of eNB 800 may be enclosed in a common device and may be interconnected or operably associated using one or more wired or wireless links.
  • components of eNB 800 may be distributed among multiple or separate devices.
  • memory 806 may include, for example, a random access memory (RAM) , a read only memory (ROM) , a dynamic RAM (DRAM) , a synchronous DRAM (SD-RAM) , a flash memory, a volatile memory, a non-volatile memory, a cache memory, a buffer, a short term memory unit, a long term memory unit, or other suitable memory units or storage units.
  • RAM random access memory
  • ROM read only memory
  • DRAM dynamic RAM
  • SD-RAM synchronous DRAM
  • flash memory a volatile memory
  • non-volatile memory a cache memory
  • buffer a buffer
  • short term memory unit a long term memory unit
  • a long term memory unit or other suitable memory units or storage units.
  • eNB 800 may comprise an estimation module or unit 808 that may be coupled to any other component in eNB 800.
  • the estimation module 808 may be configured to measure one or more of RI, subband PMI, CQI, subband beamforming weight, rank, or other uplink subband beamforming or subband precoder related information, e.g., as described with regard to Figures 4 to 6.
  • eNB 800 may comprise a detection module or unit 810 that may be coupled to any other component in eNB 800.
  • detection module h810 may be configured to detect a change in RI and/or subband PMI, e.g., as described with regard to Figure 6.
  • the detection module 810 may initiate or trigger an aperiodical subband PMI transmission in response to detecting that the uplink precoder may need to be changed aperiodically, e.g., detecting the RI and/or subband PMI change, e.g., as described with regard to Figure 6.
  • eNB 800 may comprise a configuration module or unit 812 that may be coupled to any other component in eNB 800.
  • the configuration module 812 to configure one or more uplink subband beamforming information, e.g., one or more of a subband beamforming weight, a rank, a channel quality indication (CQI) , a rank indication (RI) , and a subband precoding matrix indicator (PMI) , as described in the disclosure.
  • the configuration module 812 may perform one or more configurations as described in the disclosure.
  • the estimation module 808 and/or detection module 810 may be configured to perform one or more processes and/or functions, e.g., as described with regard to eNB 110 and/or other embodiments in the disclosure.
  • the transceiver 802 may be configured to transmit and/or receive one or more signalling to and from eNB 110, e.g., as described with regard to Figures 4 to 6.
  • Figure 8 illustrates the estimation module 808 and/or detection module 810 may be provided in eNB 800, in some other embodiments, the estimation module 808 and/or detection module 810 may be provided in or implemented by one or more processors, controllers or a baseband circuitry. While Figure 8 illustrates the transceiver 802, in some embodiments, the transceiver 802 may be implemented by one or more transmitters and/or one or more receivers.
  • FIG. 9 illustrates, for one embodiment, an example system comprising radio frequency (RF) circuitry 930, baseband circuitry 920, application circuitry 910, front end module (FEM) circuitry 960, memory/storage 940, one or more antennas 950, display, camera, sensor, and input/output (I/O) interface, coupled with each other at least as shown.
  • RF radio frequency
  • FEM front end module
  • FIG. 9 illustrates example components of a UE device 900 in accordance with some embodiments.
  • the application circuitry 910 may include one or more application processors.
  • the application circuitry 910 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processor (s) may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc. ) .
  • the processors may be coupled with and/or may include memory/storage and may be configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems to run on the system.
  • the baseband circuitry 920 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 920 may include one or more baseband processors and/or control logic to process baseband signals received from a receive signal path of the RF circuitry 930 and to generate baseband signals for a transmit signal path of the RF circuitry 930.
  • Baseband processing circuity 920 may interface with the application circuitry 910 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 930.
  • the baseband circuitry 920 may include a second generation (2G) baseband processor, a third generation (3G) baseband processor, a fourth generation (4G) baseband processor, and/or other baseband processor (s) 920d for other existing generations, generations in development or to be developed in the future (e.g., fifth generation (5G) , 6G, etc. ) .
  • the baseband circuitry 920 e.g., one or more of baseband processors
  • the radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc.
  • modulation/demodulation circuitry of the baseband circuitry 920 may include Fast-Fourier Transform (FFT) , precoding, and/or constellation mapping/demapping functionality.
  • FFT Fast-Fourier Transform
  • encoding/decoding circuitry of the baseband circuitry 920 may include convolution, tail-biting convolution, turbo, Viterbi, and/or Low Density Parity Check (LDPC) encoder/decoder functionality.
  • LDPC Low Density Parity Check
  • the baseband circuitry 920 may include elements of a protocol stack such as, for example, elements of an EUTRAN protocol including, for example, physical (PHY) , media access control (MAC) , radio link control (RLC) , packet data convergence protocol (PDCP) , and/or RRC elements.
  • a central processing unit (CPU) of the baseband circuitry 920 may be configured to run elements of the protocol stack for signaling of the PHY, MAC, RLC, PDCP and/or RRC layers.
  • the baseband circuitry 920 may include one or more audio digital signal processor (s) (DSP) that may include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.
  • DSP audio digital signal processor
  • Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments.
  • some or all of the constituent components of the baseband circuitry 920 and the application circuitry 910 may be implemented together such as, for example, on a system on a chip (SOC) .
  • SOC system on a chip
  • the baseband circuitry 920 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 920 may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN) , a wireless local area network (WLAN) , a wireless personal area network (WPAN) .
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • Embodiments inwhich the baseband circuitry 920 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.
  • RF circuitry 930 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • theRF circuitry 930 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 930 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 960 and provide baseband signals to the baseband circuitry 920.
  • RF circuitry 930 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 920 and provide RF output signals to the FEM circuitry 960 for transmission.
  • the RF circuitry 930 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 930 may include mixer circuitry, amplifier circuitry and/or filter circuitry.
  • the transmit signal path of the RF circuitry 930 may include filter circuitry and/or mixer circuitry.
  • RF circuitry 930 may also include synthesizer circuitry for synthesizing a frequency for use by the mixer circuitry of the receive signal path and the transmit signal path.
  • the mixer circuitry of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 960 based on the synthesized frequency provided by synthesizer circuitry.
  • the amplifier circuitry may be configured to amplify the down-converted signals.
  • the filter circuitry may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals.
  • Output baseband signals may be provided to the baseband circuitry 920 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although this is not a requirement.
  • mixer circuitry of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry to generate RF output signals for the FEM circuitry 960.
  • the baseband signals may be provided by the baseband circuitry 920 and may be filtered by filter circuitry.
  • the filter circuitry may include a low-pass filter (LPF) , although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry of the receive signal path and the mixer circuitry of the transmit signal path may include two or more mixers and may be arranged for quadrature downconversion and/or upconversion respectively.
  • the mixer circuitry of the receive signal path and the mixer circuitry of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection) .
  • the mixer circuitry of the receive signal path and the mixer circuitry may be arranged for direct downconversion and/or direct upconversion, respectively.
  • the mixer circuitry of the receive signal path and the mixer circuitry of the transmit signal path may be configured for super-heterodyne operation.
  • the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect.
  • the output baseband signals and the input baseband signals may be digital baseband signals.
  • the RF circuitry 930 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 920 may include a digital baseband interface to communicate with the RF circuitry 930.
  • ADC analog-to-digital converter
  • DAC digital-to-analog converter
  • a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.
  • the synthesizer circuitry may be a fractional-N synthesizer or a fractional N/N+1 synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable.
  • synthesizer circuitry may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry may be configured to synthesize an output frequency for use by the mixer circuitry of the RF circuitry 930 based on a frequency input and a divider control input.
  • the synthesizer circuitry may be a fractional N/N+1 synthesizer.
  • frequency input may be provided by a voltage controlled oscillator (VCO) , although that is not a requirement.
  • VCO voltage controlled oscillator
  • Divider control input may be provided by either the baseband circuitry 920 or the applications processor 910 depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 910.
  • Synthesizer circuitry of the RF circuitry 930 may include a divider, a delay-locked loop (DLL) , a multiplexer and a phase accumulator.
  • the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA) .
  • the DMD may be configured to divide the input signal by either N or N+1 (e.g., based on a carry out) to provide a fractional division ratio.
  • the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop.
  • the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line.
  • Nd is the number of delay elements in the delay line.
  • synthesizer circuitry may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other.
  • the output frequency may be a LO frequency (fLO) .
  • the RF circuitry 930 may include an IQ/polar converter.
  • FEM circuitry 960 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 950, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 930 for further processing.
  • FEM circuitry 960 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 930 for transmission by one or more of the one or more antennas 950.
  • the FEM circuitry 960 may include a TX/RX switch to switch between transmit mode and receive mode operation.
  • the FEM circuitry may include a receive signal path and a transmit signal path.
  • the receive signal path of the FEM circuitry may include a low-noise amplifier (LNA) to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 930) .
  • the transmit signal path of the FEM circuitry 960 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 930) , and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 950.
  • PA power amplifier
  • the UE 900 comprises a plurality of power saving mechanisms. If the UE 900 is in an RRC_Connected state, where it is still connected to the eNB as it expects to receive traffic shortly, then it may enter a state known as Discontinuous Reception Mode (DRX) after a period of inactivity. During this state, the device may power down for brief intervals of time and thus save power.
  • DRX Discontinuous Reception Mode
  • the UE 900 may transition off to an RRC_Idle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc.
  • the UE 900 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again.
  • the device cannot receive data in this state, in order to receive data, it must transition back to RRC_Connected state.
  • An additional power saving mode may allow a device to be unavailable to the network for periods longer than a paging interval (ranging from seconds to a few hours) . During this time, the device is totally unreachable to the network and may power down completely. Any data sent during this time incurs a large delay and it is assumed the delay is acceptable.
  • transmit circuitry, control circuitry, and/or receive circuitry discussed or described herein may be embodied in whole or in part in one or more of the RF circuitry 930, the baseband circuitry 920, FEM circuitry 960 and/or the application circuitry 910.
  • the term "circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC) , an electronic circuit, a processor (shared, dedicated, or group) , and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules or units.
  • some or all of the constituent components of the baseband circuitry 920, the application circuitry 910, and/or the memory/storage may be implemented together on a system on a chip (SOC) .
  • SOC system on a chip
  • Memory/storage 940 may be used to load and store data and/or instructions, for example, for system.
  • Memory/storage 940 for one embodiment may include any combination of suitable volatile memory (e.g., dynamic random access memory (DRAM) ) and/or non-volatile memory (e.g., Flash memory) .
  • suitable volatile memory e.g., dynamic random access memory (DRAM)
  • non-volatile memory e.g., Flash memory
  • the I/O interface may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system.
  • User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc.
  • Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface.
  • USB universal serial bus
  • sensor may include one or more sensing devices to determine environmental conditions and/or location information related to the system.
  • the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit.
  • the positioning unit may also be part of, or interact with, the baseband circuitry and/or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
  • GPS global positioning system
  • the display may include a display (e.g., a liquid crystal display, a touch screen display, etc. ) .
  • a display e.g., a liquid crystal display, a touch screen display, etc.
  • system may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, etc.
  • system may have more or less components, and/or different architectures.
  • circuitry may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC) , an electronic circuit, a processor (shared, dedicated, or group) , and/or memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules or units.
  • Example 1 may include a base station, comprising: a memory to store one or more instructions; a processor to execute the one or more instructions to: estimate one or more of a subband beamforming weight, a rank, a channel quality indication (CQI) , a rank indication (RI) , and a subband precoding matrix indicator (PMI) based on a sounding reference signal (SRS) from a user equipment; and to provide the subband PMI via a Physical Downlink Shared Channel (PDSCH) .
  • a base station comprising: a memory to store one or more instructions; a processor to execute the one or more instructions to: estimate one or more of a subband beamforming weight, a rank, a channel quality indication (CQI) , a rank indication (RI) , and a subband precoding matrix indicator (PMI) based on a sounding reference signal (SRS) from a user equipment; and to provide the subband PMI via a Physical Downlink Shared Channel (PDSCH) .
  • Example 2 may include the subject matter of any of the examples described herein, wherein the processor further to: configure an uplink transmission mode for the UE to indicate a subband beamforming for a Physical Uplink Shared channel (PUSCH) via Radio Resource Control (RRC) signaling.
  • the processor further to: configure an uplink transmission mode for the UE to indicate a subband beamforming for a Physical Uplink Shared channel (PUSCH) via Radio Resource Control (RRC) signaling.
  • PUSCH Physical Uplink Shared channel
  • RRC Radio Resource Control
  • Example 3 may include the subject matter of any of the examples described herein, wherein the processor further to: configure a subband size based on a maximum number of uplink resource blocks (RBs) or via RRC signaling.
  • RBs uplink resource blocks
  • Example 4 may include the subject matter of any of the examples described herein, wherein the processor further to: obtain a downlink channel from the UE, wherein the downlink channel is associated with a Cell-specific Reference Signal (CRS) or a Channel State Information Reference Signal (CSI-RS) .
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • Example 5 may include the subject matter of any of the examples described herein, wherein the processor further to: configure an indicator for the rank of the beamforming weight in an uplink grant.
  • Example 6 may include the subject matter of any of the examples described herein, wherein the processor further to: provide the subband PMI periodically.
  • Example 7 may include the subject matter of any of the examples described herein, wherein the processor further to: configure a period and a subframe offset via RRC signaling.
  • Example 8 may include the subject matter of any of the examples described herein, wherein the processor further to: provide the subband PMI aperiodically in response to detecting a change in the RI and/or the subband PMI.
  • Example 9 may include the subject matter of any of the examples described herein, wherein the processor further to: configure an indicator in a downlink assignment to indicate if the PDSCH contain a subband PMI.
  • Example 10 may include the subject matter of any of the examples described herein, wherein the processor further to: map the subband PMI and PDSCH in a same resource block, wherein the subband PMI and the PDSCH have different channel coding and modulation schemes.
  • Example 11 may include the subject matter of any of the examples described herein, wherein one subband PMI indicates the PMI in one RB cluster.
  • Example 12 may include a user equipment (UE) , comprising: a memory to store one or more instructions; and a processor to execute the one or more instructions to: obtain from a base station one or more of a rank indication (RI) and a subband Precoder Matrix Indicator (PMI) estimated by the base station; and select a subband beamforming weight based on one or more of the RI and the subband PMI.
  • UE user equipment
  • UE user equipment
  • a memory to store one or more instructions
  • PMI subband Precoder Matrix Indicator
  • Example 13 may include the subject matter of any of the examples described herein, wherein the processor further to: estimate a downlink channel from Cell-specific Reference Signal (CRS) or Channel State Information Reference Signal (CSI-RS) .
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • Example 14 may include the subject matter of any of the examples described herein, wherein the processor further to: estimate the subband beamforming weight based on the RI and the downlink channel.
  • Example 15 may include the subject matter of any of the examples described herein, wherein the processor further to: provide a subband precoder based on the selected subband beamforming weight.
  • Example 16 may include an apparatus, comprising: an estimation module to estimate one or more of a subband beamforming weight, a rank and/or a channel quality indication (CQI) , a rank indication (RI) , a subband precoder matrix indicator (PMI) ; based on a sounding reference signal (SRS) from a user equipment (UE) ; and a configuration module to configure one or more of an indication for the RI and a modulation and coding scheme (MCS) in an uplink grant.
  • CQI channel quality indication
  • RI rank indication
  • PMI subband precoder matrix indicator
  • SRS sounding reference signal
  • UE user equipment
  • MCS modulation and coding scheme
  • Example 17 may include the subject matter of any of the examples described herein, wherein the estimation module further to: estimate the subband beamforming based on a SRS from the UE.
  • Example 18 may include the subject matter of any of the examples described herein, wherein the estimation module further to: provide to the UE the estimated subband PMI associated with a Physical Downlink Shared Channel (PDSCH) .
  • PDSCH Physical Downlink Shared Channel
  • Example 19 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure one or more clusters of one or more resource blocks; and configure the subband PMI to indicate precoding information of each cluster.
  • Example 20 may include the subject matter of any of the examples described herein, the configuration module further to: configure a precoding information indicator in the uplink grant, wherein the precoding information indicator to indicate a precoder in a cluster.
  • Example 21 may include the subject matter of any of the examples described herein, further comprising: a detection module to detect a change in one or more of the RI or the subband PMI.
  • Example 22 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure a trigger for an aperiodical subband PMI transmission in the uplink grant.
  • Example 23 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure a trigger to trigger the aperiodical subband PMI transmission based on a change in the RI or the subband PMI.
  • Example 24 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure a period and a subframe offset for a periodical subband PMI transmission in a downlink assignment.
  • Example 25 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure a transmission mode to indicate a subband beamforming for a physical uplink shared channel (PUSCH) .
  • PUSCH physical uplink shared channel
  • Example 26 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure a maximum number of one or more uplink resource blocks (RBs) in a subband.
  • the configuration module further to: configure a maximum number of one or more uplink resource blocks (RBs) in a subband.
  • RBs uplink resource blocks
  • Example 27 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure the subband PMI by the PDSCH.
  • Example 28 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure an indicator in downlink assignment to indicate if the PDSCH comprise a subband PMI.
  • Example 29 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure the subband PMI and the PDSCH to map in one or more same resource blocks or to have different MCS.
  • Example 30 may include the subject matter of any of the examples described herein, wherein the configuration module further to: configure a maximum number of subband precoders to be no more than a maximum number of resource blocks.
  • Example 31 may include a method to configure an uplink transmission mode indicating the subband beamforming for Physical Uplink Shared Channel (PUSCH) .
  • PUSCH Physical Uplink Shared Channel
  • Example 32 may include the subject matter of any of the examples described herein, wherein the new transmission mode may be configured via Radio Resource Control (RRC) signaling.
  • RRC Radio Resource Control
  • Example 33 may include the subject matter of any of the examples described herein, wherein the subband size may be decided according to a maximum number of uplink Resource Blocks (RBs) or configured via RRC signaling.
  • RBs uplink Resource Blocks
  • Example 34 may include the subject matter of any of the examples described herein, wherein the subband beamforming weight may be estimated in User Equipment (UE) side.
  • UE User Equipment
  • Example 35 may include the subject matter of any of the examples described herein, wherein one indicator for the rank of the beamforming weight may be added in uplink grant.
  • Example 36 may include the subject matter of any of the examples described herein, wherein UE may estimate subband beamforming weight according to the configured rank in uplink grant and downlink channel estimated from Cell-specific Reference Signal (CRS) or Channel State Information Reference Signal (CSI-RS) .
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • Example 37 may include the subject matter of any of the examples described herein, wherein the subband beamforming weight may be based on uplink codebook.
  • Example 38 may include the subject matter of any of the examples described herein, wherein each subband precoders may have the same rank, and one indicator for the rank may be added in uplink grant.
  • Example 39 may include the subject matter of any of the examples described herein, wherein the subband Precoding Matrix Indicators (PMIs) may be configured by Physical Downlink Shared Channel (PDSCH) .
  • PMIs Precoding Matrix Indicators
  • PDSCH Physical Downlink Shared Channel
  • Example 40 may include the subject matter of any of the examples described herein, wherein the subband PMIs may be transmitted periodically, and the period and subframe offset may be configured via RRC signaling.
  • Example 41 may include the subject matter of any of the examples described herein, wherein the subband PMIs may be transmitted aperiodically, and one bit indicator in downlink assignment may be added to indicate whether this PDSCH contains subband PMIs.
  • Example 42 may include the subject matter of any of the examples described herein, wherein the subband PMIs and PDSCH may be mapped within the same RBs and they may have different types of channel coding and modulation schemes.
  • Example 43 may include the subject matter of any of the examples described herein, wherein the maximum number of subband precoders may be no more than the maximum number of RBs clusters in resource allocation type 1.
  • Example 44 may include the subject matter of any of the examples described herein, wherein one subband PMI may indicate the PMI in one RB cluster.
  • Example 45 may include the subject matter of any of the examples described herein, wherein the subband PMI may be configured via uplink grant.
  • Example 46 may include one or more non-transitory computer-readable media comprising instructions to cause an electronic device, upon execution of the instructions by one or more processors of the electronic device, to perform one or more elements of a method or a base station or a UE or an apparatus described in or related to any of examples 1-45 and/or any other process described herein.
  • Example 47 may include a method of communicating in a wireless network as shown and described herein and/or comprising one or more elements of a method or a base station or a UE or an apparatus or computer-readable media described in or related to any of examples 1-46 and/or any other method or process described herein.
  • Example 48 may include a wireless communication system as shown and described herein and/or comprising one or more elements of a method or a base station or a UE or an apparatus or computer-readable media described in or related to any of examples 1-46 and/or any other embodiments described herein.
  • Example 49 may include a wireless communication device as shown and described herein and/or comprising one or more elements of a method or a base station or a UE or an apparatus or computer-readable media described in or related to any of examples 1-46 and/or any other embodiments described herein.
  • Example 50 may include a method to transmit a PUSCH based on a subband beamforming weight.
  • modules or units may be implemented as a hardware circuit comprising custom VLSI circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components.
  • a module or unit may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
  • Modules or units may also be implemented in software for execution by various types of processors.
  • An identified module or unit of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions, which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executable code of an identified module or unit need not be physically located together, but may comprise disparate instructions stored in different locations which, when joined logically together, comprise the module or unit and achieve the stated purpose for the module or unit.
  • a module or unit of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices.
  • operational data may be identified and illustrated herein within modules or units, and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.
  • the modules or units may be passive or active, including agents operable to perform desired functions.
PCT/CN2016/079677 2016-04-19 2016-04-19 System and method for uplink subband beamforming WO2017181345A1 (en)

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