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WO2017166024A1 - Appareil et procédé de contrôle de signalisation de csi-rs - Google Patents

Appareil et procédé de contrôle de signalisation de csi-rs Download PDF

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Publication number
WO2017166024A1
WO2017166024A1 PCT/CN2016/077515 CN2016077515W WO2017166024A1 WO 2017166024 A1 WO2017166024 A1 WO 2017166024A1 CN 2016077515 W CN2016077515 W CN 2016077515W WO 2017166024 A1 WO2017166024 A1 WO 2017166024A1
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Prior art keywords
csi
symbols
circuitry
self
indication
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Ceased
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PCT/CN2016/077515
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English (en)
Inventor
Yushu Zhang
Yuan Zhu
Huaning Niu
Gang Gary XIONG
Qinghua Li
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Intel IP Corp
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Intel IP Corp
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Priority to CN201680083733.3A priority Critical patent/CN109314872B/zh
Priority to PCT/CN2016/077515 priority patent/WO2017166024A1/fr
Publication of WO2017166024A1 publication Critical patent/WO2017166024A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • 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
    • 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
    • H04L5/0078—Timing of allocation
    • H04L5/0082—Timing of allocation at predetermined intervals
    • 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
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • 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
    • 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 signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK

Definitions

  • Embodiments described herein generally relate to the field of wireless communications and, more particularly, to methods and apparatus for signaling of reference signals
  • Fig. 1 is diagram of an example wireless network according to various embodiments
  • Fig. 2a illustrates a Type 1 self ⁇ contained subframe structure
  • Fig. 2b illustrates a Type 2 self ⁇ contained subframe structure
  • Fig. 3a and 3b illustrate Type 1 self ⁇ contained subframe structures according to embodiments
  • Fig. 4a and 4b illustrate Type 2 self ⁇ contained subframe structures according to embodiments
  • Fig. 5 illustrates a method performed by an eNB according to embodiments
  • Fig. 6 illustrates a method performed by a User Equipment (UE) according to some embodiments
  • Fig. 7 is a block diagram of an example system operable to implement some embodiments.
  • Fig. 8 is a block diagram of an example User Equipment device operable to implement some embodiments.
  • the phrase “in one embodiment” is used repeatedly. The phrase generally does not refer to the same embodiment; however, it may.
  • the terms “comprising, ” “having, ” and “including” are synonymous, unless the context dictates otherwise.
  • the phrase “A/B” means “A or B” .
  • the phrase “A and/or B” means “ (A) , (B) , or (A and B) ” .
  • the phrase “at least one of A, B and C” means “ (A) , (B) , (C) , (A and B) , (A and C) , (B and C) or (A, B and C) ” .
  • the phrase “ (A) B” means “ (B) or (A B) ” , that is, A is optional.
  • module 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 instructions and/or programs, a combinational logic circuit, and/or other suitable components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • Radio systems specifically included within the scope of the present invention 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 bridges
  • hubs 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 including personal computers (PCs) , tablets and related peripherals, personal digital assistants (PDAs) , 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.
  • PCs personal computers
  • PDAs personal digital assistants
  • 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.
  • Wireless communication network 100 may be an access network of a 3rd Generation Partnership Project (3GPP) long ⁇ term evolution (LTE) , long ⁇ term evolution ⁇ advanced (LTE ⁇ A) network such as an evolved universal mobile telecommunication system (UMTS) terrestrial radio access network (E ⁇ UTRAN) or 5G network.
  • 3GPP 3rd Generation Partnership Project
  • LTE long ⁇ term evolution
  • LTE ⁇ A long ⁇ term evolution ⁇ advanced
  • UMTS evolved universal mobile telecommunication system
  • E ⁇ UTRAN terrestrial radio access network
  • 5G network 5G network.
  • the network 100 may include a base station, e.g., evolved node base station (eNB) 102, configured to wirelessly communicate with one or more mobile device (s) or terminal (s) , e.g., user equipment (UE) 104.
  • eNB evolved node base station
  • the eNB 102 may be a fixed station (e.g., a fixed node) or a mobile station/node.
  • the eNB 104 may include receiver circuitry 120 with which to receive signals from UE 104 via one or more antennas 130.
  • eNB 104 may include transmitter circuitry 124 with which to transmit signals to UE 104 via one or more antennas 130.
  • eNB 104 may also include controller circuitry 128 in communication with receiver module 120 and transmitter module 124 and configured to encode and decode information communicated by the signals.
  • Controller module 128 also includes CSI ⁇ RS configuration circuitry 126 to facilitate generation and mapping CSI ⁇ RS messages in the network 100.
  • control circuitry 128 may be comprised in a separate device from the receiver circuitry 120 and/or the transmitter circuitry 124.
  • the eNB 104 may be implemented as part of a cloud ⁇ RAN (C ⁇ RAN) .
  • the UE 104 and/or the eNB 102 may include a plurality of antennas 156, 130 to implement a multiple ⁇ input ⁇ multiple ⁇ output (MIMO) transmission system, which 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 or variations of smart antenna processing.
  • MIMO multiple ⁇ input ⁇ multiple ⁇ output
  • UE 104 comprises transmitter circuitry 148 for transmitting signals to eNB 102 and receiver circuitry 144 for receiving signals from the eNB 102.
  • UE 104 further comprises controller circuitry 152 coupled between receiver circuitry 144 and transmitter circuitry 148 and including communication circuitry 154 to encode and decode information communicated by the signals.
  • Controller circuitry 152 may also include CSI reporting circuitry 158 to facilitate measurement and reporting of channel state information by the UE 104.
  • Example embodiments provide systems, apparatuses, and methods for control signaling of CSI ⁇ RS in millimeter wave (mmW) systems.
  • mmW millimeter wave
  • mmW millimeter wave
  • a new subframe structure such as self ⁇ contained subframe structure shown in Figure 1
  • backward compatibility with current wireless standards may be broken.
  • this provides an opportunity for a new physical layer signal design.
  • 5G networks may implement spatial multiplexing using multiple input multiple output (MIMO) techniques.
  • MIMO multiple input multiple output
  • FD ⁇ MIMO Full Dimension MIMO
  • Massive MIMO has been proposed.
  • CSI ⁇ RS Channel State Information Reference Signal
  • Tx downlink Transmission
  • Figures 2a/2b illustrates a self ⁇ contained subframe structure that may be used.
  • Figure 2a illustrates a Type 1 subframe 210 including a physical downlink control channel (PDCCH) 212 and a physical downlink shared channel (PDSCH) 214 from a eNB 102 to a UE 104 and acknowledgements (ACK) 218 of data transmitted in the PDSCH 214 from the UE to the eNB.
  • a guard gap 216 is provided between the PDSCH 214 and the ACK regions 218 to avoid interference.
  • Figure 2b illustrates a Type 2 subframe 220 including a physical downlink control channel (PDCCH) 212 from the eNB 102 to the UE 104, a physical uplink shared channel (PUSCH) 224 from the UE to the eNB and acknowledgements (ACK) 218 of data transmitted in the PUSCH 224 from the eNB 102 to the UE 104.
  • PDCCH physical downlink control channel
  • PUSCH physical uplink shared channel
  • ACK acknowledgements
  • an Omni ⁇ directional antenna may be used in both eNodeB 102 and UE 104.
  • the Tx beamforming and Receiving (Rx) beamforming may be used in the downlink.
  • CSI ⁇ RS may be used to measure one or more of the Tx beams and search the best receive (Rx) beams.
  • control signaling for the CSI ⁇ RS to support the Tx and Rx beamforming is to be supported in the new frame structure 210, 220 of Figures 2a/2b remains undefined.
  • the base sequence used for the CSI ⁇ RS may be generated based on a cell ID and a number of subframes in a Quadrature Phase Shift Keying (QPSK) waveform or Zadoff ⁇ Chu sequence to achieve symmetric design for CSI ⁇ RS and a Sounding Reference Signal (SRS) .
  • QPSK Quadrature Phase Shift Keying
  • SRS Sounding Reference Signal
  • the CSI ⁇ RS may be mapped into more than one symbol within different Tx beams. Furthermore, each Tx beam may be applied in more than one Antenna Ports (APs) . To facilitate measurement of a greater number of Tx beams in one subframe, more symbols and APs may be used for the CSI ⁇ RS.
  • APs Antenna Ports
  • the CSI ⁇ RS may be mapped to different symbols.
  • the CSI ⁇ RS may be mapped to a first position 312 between the PDCCH 212 and PDSCH 214 area, as illustrated in Figure 3a, so that the CSI ⁇ RS may act as a gap for PDCCH decoding processing in the case that the Rx beams for PDSCH rely on the information in downlink assignment transmitted in the PDCCH.
  • the CSI ⁇ RS may be mapped to a second position 322 after the PDSCH, in a Type 1 subframe 320 as illustrated in Figure 3b.
  • the CSI ⁇ RS may be mapped to the symbols after the PDCCH and before the ACK.
  • Figures 4a and 4b illustrate Type 2 subframe structures 410, 420 including the CSI ⁇ RS.
  • the CSI ⁇ RS may be mapped to a first position 412 to symbols between the PDCCH 212 and a gap region 222 before the PUSCH 224 in the subframe 410.
  • the CSI ⁇ RS may be mapped to a second position 422 to symbols between a gap region 216 after the PUSCH 224 and the ACK region 218 of the Type 2 subframe 420, as illustrated in Figure 4b.
  • the CSI ⁇ RS may be mapped to either of the illustrated positions in the Type 1 or Type 2 subframes. In some embodiments, both positions may be used simultaneously.
  • the CSI ⁇ RS may be mapped to the first position 412 for a Type 2 subframe 410 as illustrated in Figure 4a, between the PDCCH 212 and first GAP region 222, while the SRS may be mapped to symbols in the second position 422 between the gap region 216 after the PUSCH 224 and the ACK region 218 of the Type 2 subframe.
  • the CSI ⁇ RS may be transmitted periodically.
  • the period and subframe offset for each CSI ⁇ RS process may be configured via RRC signaling.
  • the symbols allocated for CSI ⁇ RS transmission may not be required for that purpose in every subframe.
  • the symbols reserved for CSI ⁇ RS may be considered as a gap and no data will be mapped to these symbols.
  • the first position for the CSI ⁇ RS in Type 1 and Type 2 subframes may be used for periodical CSI reporting by a UE 104.
  • the number of symbols and APs for this CSI ⁇ RS allocation may be fixed in the system or configured via master information block (MIB) , system information block (SIB) or RRC signaling.
  • MIB master information block
  • SIB system information block
  • RRC Radio Resource Control
  • the UE 104 may first need to determine the number of symbols used for the PDCCH to identify a starting symbol index for the CSI ⁇ RS allocation to be used for CSI reporting.
  • the CSI reporting may be in an aperiodical mode.
  • the second position for CSI ⁇ RS in Type 1 and Type 2 Subframe may be used for aperiodical CSI reporting.
  • the aperiodical CSI reporting may be triggered in response to a downlink control information, e.g. a downlink assignment, which may include CSI ⁇ RS trigger information.
  • a downlink control information e.g. a downlink assignment, which may include CSI ⁇ RS trigger information.
  • a 2 ⁇ bit field may be used in the downlink assignment to trigger CSI measurement and the indication for this trigger may be listed in Table 1 as an example.
  • the information in Table 1 may be configured for each CSI process, and the downlink assignment may contain a CSI process indicator, where value 0 may indicate there is no CSI ⁇ RS and a value x, where x is not equal to 0, may indicate a configuration associated with a CSI process x ⁇ 1 is to be used for the aperiodical CSI reporting.
  • the aperiodical CSI transmission may be triggered using the semi ⁇ persistent scheduling (SPS) mechanism using downlink control signaling.
  • SPS semi ⁇ persistent scheduling
  • the SPS configuration may be predefined in the RRC signaling and may contain information such as: a number of OFDM symbols per subframe for CSI ⁇ RS; CSI ⁇ RS OFDM positions (either after the PDCCH, first position, or after PDSCH/PUSCH, second position) ; a CSI ⁇ RS transmission period and offset; whether interference averaging is allowed among IMRs of the same OFDM symbol across all or subsets of subframes scheduled by one SPS scheduling.
  • the scheduled aperiodical CSI transmission may be stopped by a corresponding SPS ⁇ release.
  • the aperiodical CSI reporting may be triggered by provision of a downlink assignment for CSI measurement only on the PDCCH, which may include the CSI process index only or the information as below:
  • the Tx beams may be divided into several groups according to their correlation, which may be configured by RRC signaling.
  • N indicates the maximum number of aperiodical CSI ⁇ RS, which may be configured by RRC signaling or fixed in the system.
  • the Group index 0 may indicate no CSI ⁇ RS is applied in this symbol.
  • the UE may measure the Tx beam groups with a corresponding Rx beam.
  • One special case may be defined as one group that only contains one Tx beam.
  • the Tx beam index may be used by the UE to derive the corresponding Rx beam which are searched from the Tx beam including the reference signal.
  • cross ⁇ subframe scheduling can be used for triggering the aperiodical CSI.
  • the aperiodical CSI may be scheduled in subframe k ⁇ g, where g may be fixed in the system or configured via RRC signaling or downlink assignment for CSI reporting.
  • FIG. 5 illustrates a method 500 performed by an eNB 102 according to some embodiments.
  • the eNB 102 first configures 502 a CSI ⁇ RS transmission using downlink control information (DCI) or RRC signaling in accordance with the above described techniques.
  • the eNB 102 then generate 504 CSI ⁇ RS and map the generated CSI ⁇ RS to symbols of the self ⁇ contained subframe structure based on the configuration for the CSI ⁇ RS.
  • the eNB 102 then transmits 506 the subframe including the CSI ⁇ RS symbols to one or more UEs 104.
  • DCI downlink control information
  • Figure 6 illustrates a method 600 performed at UE 104 according to some embodiments.
  • the UE 104 receives 602 CSI ⁇ RS configuration information in the form of DCI or RRC signaling. Based on the received CSI ⁇ RS configuration, the UE 104 is then able to receive and measure CSI ⁇ RS symbols in a subframe received by the UE 104 from an eNB 102. The UE 104 then reports 606 channel state information corresponding to the measured CSI ⁇ RS in accordance with the received configuration information in line with the above described techniques.
  • Embodiments of the technology herein may be described as related to the third generation partnership project (3GPP) long term evolution (LTE) or LTE ⁇ advanced (LTE ⁇ A) standards.
  • 3GPP third generation partnership project
  • LTE long term evolution
  • LTE ⁇ A LTE ⁇ advanced
  • terms or entities such as eNodeB (eNB) , mobility management entity (MME) , user equipment (UE) , etc. may be used that may be viewed as LTE ⁇ related terms or entities.
  • the technology may be used in or related to other wireless technologies such as the Institute of Electrical and Electronic Engineers (IEEE) 802.16 wireless technology (WiMax) , IEEE 802.11 wireless technology (WiFi) , various other wireless technologies such as global system for mobile communications (GSM) , enhanced data rates for GSM evolution (EDGE) , GSM EDGE radio access network (GERAN) , universal mobile telecommunications system (UMTS) , UMTS terrestrial radio access network (UTRAN) , or other 2G, 3G, 4G, 5G, etc. technologies either already developed or to be developed.
  • LTE ⁇ related terms such as eNB, MME, UE, etc.
  • one or more entities or components may be used that may be considered to be equivalent or approximately equivalent to one or more of the LTE ⁇ based terms or entities.
  • 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 circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • circuitry may include logic, at least partially operable in hardware.
  • FIG. 7 illustrates, for one embodiment, example components of an electronic device 700.
  • the electronic device 700 may be, implement, be incorporated into, or otherwise be a part of a user equipment (UE) , an evolved NodeB (eNB) , or any other suitable electronic device.
  • the electronic device 700 may include application circuitry 702, baseband circuitry 704, Radio Frequency (RF) circuitry 706, front ⁇ end module (FEM) circuitry 708 and one or more antennas 710, coupled together at least as shown.
  • UE user equipment
  • eNB evolved NodeB
  • the electronic device 700 may include application circuitry 702, baseband circuitry 704, Radio Frequency (RF) circuitry 706, front ⁇ end module (FEM) circuitry 708 and one or more antennas 710, coupled together at least as shown.
  • RF Radio Frequency
  • FEM front ⁇ end module
  • the application circuitry 702 may include one or more application processors.
  • the application circuitry 702 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 704 may include circuitry such as, but not limited to, one or more single ⁇ core or multi ⁇ core processors.
  • the baseband circuitry 704 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 706 and to generate baseband signals for a transmit signal path of the RF circuitry 706.
  • Baseband processing circuity 704 may interface with the application circuitry 702 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 706.
  • the baseband circuitry 704 may include a second generation (2G) baseband processor 704a, third generation (3G) baseband processor 704b, fourth generation (4G) baseband processor 704c, and/or other baseband processor (s) 704d for other existing generations, generations in development or to be developed in the future (e.g., fifth generation (5G) , 6G, etc. ) .
  • the baseband circuitry 704 e.g., one or more of baseband processors 704a ⁇ d
  • 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 704 may include Fast ⁇ Fourier Transform (FFT) , precoding, and/or constellation mapping/demapping functionality.
  • FFT Fast ⁇ Fourier Transform
  • encoding/decoding circuitry of the baseband circuitry 704 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 704 may include elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network (EUTRAN) protocol including, for example, physical (PHY) , media access control (MAC) , radio link control (RLC) , packet data convergence protocol (PDCP) , and/or radio resource control (RRC) elements.
  • a central processing unit (CPU) 704e of the baseband circuitry 704 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 may include one or more audio digital signal processor (s) (DSP) 704f.
  • the audio DSP (s) 704f may be include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.
  • the baseband circuitry 704 may further include memory/storage 704g.
  • the memory/storage 704g may be used to load and store data and/or instructions for operations performed by the processors of the baseband circuitry 704.
  • Memory/storage for one embodiment may include any combination of suitable volatile memory and/or non ⁇ volatile memory.
  • the memory/storage 704g may include any combination of various levels of memory/storage including, but not limited to, read ⁇ only memory (ROM) having embedded software instructions (e.g., firmware) , random access memory (e.g., dynamic random access memory (DRAM) ) , cache , buffers, etc.
  • ROM read ⁇ only memory
  • DRAM dynamic random access memory
  • the memory/storage 704g may be shared among the various processors or dedicated to particular processors.
  • 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 704 and the application circuitry 702 may be implemented together such as, for example, on a system on a chip (SOC) .
  • SOC system on a chip
  • the baseband circuitry 704 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 704 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
  • multi ⁇ mode baseband circuitry Embodiments in which the baseband circuitry 704 is configured to support radio communications of more than one wireless protocol.
  • RF circuitry 706 may enable communication with wireless networks using modulated electromagnetic radiation through a non ⁇ solid medium.
  • the RF circuitry 706 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 706 may include a receive signal path which may include circuitry to down ⁇ convert RF signals received from the FEM circuitry 708 and provide baseband signals to the baseband circuitry 704.
  • RF circuitry 706 may also include a transmit signal path which may include circuitry to up ⁇ convert baseband signals provided by the baseband circuitry 704 and provide RF output signals to the FEM circuitry 708 for transmission.
  • the RF circuitry 706 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 706 may include mixer circuitry 706a, amplifier circuitry 706b and filter circuitry 706c.
  • the transmit signal path of the RF circuitry 706 may include filter circuitry 706c and mixer circuitry 706a.
  • RF circuitry 706 may also include synthesizer circuitry 706d for synthesizing a frequency for use by the mixer circuitry 706a of the receive signal path and the transmit signal path.
  • the mixer circuitry 706a of the receive signal path may be configured to down ⁇ convert RF signals received from the FEM circuitry 708 based on the synthesized frequency provided by synthesizer circuitry 706d.
  • the amplifier circuitry 706b may be configured to amplify the down ⁇ converted signals and the filter circuitry 706c 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.
  • LPF low ⁇ pass filter
  • BPF band ⁇ pass filter
  • Output baseband signals may be provided to the baseband circuitry 704 for further processing.
  • the output baseband signals may be zero ⁇ frequency baseband signals, although this is not a requirement.
  • mixer circuitry 706a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 706a of the transmit signal path may be configured to up ⁇ convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 706d to generate RF output signals for the FEM circuitry 708.
  • the baseband signals may be provided by the baseband circuitry 704 and may be filtered by filter circuitry 706c.
  • the filter circuitry 706c may include a low ⁇ pass filter (LPF) , although the scope of the embodiments is not limited in this respect.
  • LPF low ⁇ pass filter
  • the mixer circuitry 706a of the receive signal path and the mixer circuitry 706a 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 706a of the receive signal path and the mixer circuitry 706a 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 706a of the receive signal path and the mixer circuitry 706a may be arranged for direct downconversion and/or direct upconversion, respectively.
  • the mixer circuitry 706a of the receive signal path and the mixer circuitry 706a 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 706 may include analog ⁇ to ⁇ digital converter (ADC) and digital ⁇ to ⁇ analog converter (DAC) circuitry and the baseband circuitry 704 may include a digital baseband interface to communicate with the RF circuitry 706.
  • 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 706d 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 706d may be a delta ⁇ sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase ⁇ locked loop with a frequency divider.
  • the synthesizer circuitry 706d may be configured to synthesize an output frequency for use by the mixer circuitry 706a of the RF circuitry 706 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 706d 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 704 or the applications processor 702 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 702.
  • Synthesizer circuitry 706d of the RF circuitry 706 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 706d 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 706 may include an IQ/polar converter.
  • FEM circuitry 708 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 710, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 706 for further processing.
  • FEM circuitry 708 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 706 for transmission by one or more of the one or more antennas 710.
  • the FEM circuitry 708 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 706) .
  • the transmit signal path of the FEM circuitry 708 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 706) , and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 610.
  • PA power amplifier
  • the electronic device 700 may include additional elements such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface.
  • additional elements such as, for example, memory/storage, display, camera, sensor, and/or input/output (I/O) interface.
  • the electronic device 700 of Figure 7 may be configured to perform one or more processes, techniques, and/or methods as described herein, or portions thereof. Such processes may include one or more of the following examples.
  • Figure 8 shows an embodiment in which the electronic device 700 implements a UE 104 in the specific form of a mobile device 800.
  • user interfaces could include, but are not limited to, a display 840 (e.g., a liquid crystal display, a touch screen display, etc. ) , a speaker 830, a microphone 890, one or more cameras 880 (e.g., a still camera and/or a video camera) , a flashlight (e.g., a light emitting diode flash) , and a keyboard 870.
  • a display 840 e.g., a liquid crystal display, a touch screen display, etc.
  • a speaker 830 e.g., a liquid crystal display, a touch screen display, etc.
  • a microphone 890 e.g., a microphone 890
  • one or more cameras 880 e.g., a still camera and/or a video camera
  • a flashlight e.g., a light emitting diode flash
  • the peripheral component interfaces may include, but are not limited to, a non ⁇ volatile memory port, an audio jack, and a power supply interface.
  • 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, a network interface to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
  • GPS global positioning system
  • the electronic device 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, a mobile phone, etc.
  • system 800 may have more or less components, and/or different architectures.
  • the implemented wireless network may be a 3rd Generation Partnership Project’s long term evolution (LTE) advanced wireless communication standard, which may include, but is not limited to releases 8, 9, 10, 11, 12, 13, and 14 or later, of the 3GPP’s LTE ⁇ A or 5G standards.
  • LTE long term evolution
  • Example 1 may include a system configures the Channel State Information Reference Signal (CSI ⁇ RS) transmission in the eNodeB side and the self ⁇ contained subframe structure, which may contain two types of subframes: type 1 subframe for downlink data transmission and type 2 subframe for uplink data transmission.
  • CSI ⁇ RS Channel State Information Reference Signal
  • Example 2 may include the method of example 1, the CSI ⁇ RS may be mapped to the symbols after Physical Downlink Control Channel (PDCCH) or Physical Downlink Shared Channel (PDSCH) for the type 1 subframe.
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • Example 3 may include the method of example 1, the CSI ⁇ RS may be mapped to the symbols after PDCCH or before the acknowledge (ACK) for the type 2 subframe.
  • Example 4 may include the method of example 1, the CSI ⁇ RS in symbols after PDCCH may be used for periodical CSI reporting and the CSI ⁇ RS before the ACK or after the PDSCH may be used for aperiodical CSI reporting.
  • Example 5 may include the method of example 4, the number of symbols for the periodical CSI ⁇ RS may be configured by the RRC signaling or fixed in the system.
  • Example 6 may include the method of example 4, if the UE is not configured to measure the CSI ⁇ RS in one subframe, this area may be considered as a gap.
  • Example 7 may include the method of example 4, the aperiodical CSI reporting may be triggered by the Downlink Control Information (DCI) .
  • DCI Downlink Control Information
  • Example 8 may include the method of example 7, a 2 ⁇ bit CSI trigger may be added into the DCI, and its value may indicate the beam pattern of the CSI ⁇ RS and value 3 may indicate there is no aperiodical CSI ⁇ RS in this subframe.
  • Example 9 may include the method of example 7, the transmission beam group for each CSI ⁇ RS symbols may be configured in the DCI for periodical CSI reporting.
  • Example 10 may include the method of example 4, the semi ⁇ persistent scheduling (SPS) may be used for the periodical CSI reporting and the interference averaging may be configured by the Intel Confidential DCI.
  • SPS semi ⁇ persistent scheduling
  • Example 11 may include the method of example 4, the aperiodical CSI reporting may be pre ⁇ scheduled in the other type of subframe structures, and the subframe offset between the control signaling and the CSI ⁇ RS subframe may be fixed in the system or configured by the RRC signaling or indicated by the DCI.
  • Example 12 may include an apparatus for use in an eNB in a wireless communication network, the apparatus comprising control circuitry to generate first channel state information reference signals (CSI ⁇ RS) , and map the generated CSI ⁇ RS as symbols of a self ⁇ contained subframe structure, and transmit circuitry coupled to the control circuitry, the transmit circuitry to transmit the mapped CSI ⁇ RS symbols.
  • CSI ⁇ RS channel state information reference signals
  • Example 13 may include the apparatus of example 12, the control circuitry further to map the first CSI ⁇ RS to symbols between a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) in a type 1 self ⁇ contained subframe structure.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • Example 14 may include the apparatus of example 12, the control circuitry further to map the first CSI ⁇ RS to symbols between a physical downlink shared channel (PDSCH) and acknowledgement (ACK) symbols in a type 1 self ⁇ contained subframe structure.
  • PDSCH physical downlink shared channel
  • ACK acknowledgement
  • Example 15 may include the apparatus of example 12, the control circuitry further to map the first CSI ⁇ RS to at least one of: symbols between a physical downlink control channel (PDCCH) and a gap region prior to a physical uplink shared channel (PUSCH) in a type 2 self ⁇ contained subframe structure; and a gap region after the PUSCH and acknowledgement (ACK) symbols in a type 2 self ⁇ contained subframe structure.
  • PDCCH physical downlink control channel
  • PUSCH physical uplink shared channel
  • ACK acknowledgement
  • Example 16 may include the apparatus of example 13, the control circuitry further to allocate symbols of a subframe reserved for the CSI ⁇ RS for CSI reporting when no CSI ⁇ RS is to be transmitted.
  • Example 17 may include the apparatus of example 13, the control circuitry further to generate second CSI ⁇ RS and to map the second CSI ⁇ RS to symbols between a physical downlink shared channel (PDSCH) and acknowledgement (ACK) symbols in a type 1 self ⁇ contained subframe structure.
  • PDSCH physical downlink shared channel
  • ACK acknowledgement
  • Example 18 may include the apparatus of example 16, wherein the symbols reserved for the first CSI ⁇ RS are to provide periodical CSI reporting and the symbols reserved for the second CSI ⁇ RS are to provide aperiodical CSI reporting in a subframe when no CSI ⁇ RS is to be transmitted.
  • Example 19 may include the apparatus of any of examples 11 to 18, wherein the generated CSI ⁇ RS is mapped as a first number of symbols of the self ⁇ contained subframe structure, the first number of symbols comprising one of: a predetermined number of symbols; or a number of symbols configured using radio resource control (RRC) signaling.
  • RRC radio resource control
  • Example 20 may include the apparatus of example 17, the control circuitry further to generate downlink control information (DCI) including an indication to initiate aperiodical CSI reporting.
  • DCI downlink control information
  • Example 21 may include the apparatus of example 20, wherein the DCI comprises a CSI trigger value, the CSI trigger value indicating a beam pattern of the CSI ⁇ RS.
  • Example 22 may include the apparatus of example 21, wherein the CSI trigger value comprises a plurality of bits.
  • Example 23 may include the apparatus of example 21 or example 22, wherein the CSI trigger value comprises a predetermined value to indicate that no aperiodical CSI ⁇ RS is present in the current subframe.
  • Example 24 may include the apparatus of example 18, the control circuitry to generate downlink control information comprising an indication of a transmission beam group associated with each CSI ⁇ RS symbol in the current subframe to be used for periodical CSI reporting.
  • Example 25 may include the apparatus of example 18, the control circuitry to generate downlink control information comprising an indication of a semi ⁇ persistent scheduling grant to be used for periodical CSI reporting.
  • Example 26 may include the apparatus of example 25, wherein the DCI further comprises an indication that interference averaging is to be applied to the CSI ⁇ RS symbols.
  • Example 27 may include the apparatus of example 18, the control circuitry further to generate downlink control information (DCI) including an indication of at least one resource block to be used for aperiodical CSI reporting in a second subframe later than a first subframe in which the DCI is transmitted.
  • DCI downlink control information
  • Example 28 may include the apparatus of example 27, wherein a subframe offset comprising a number of subframes between the first subframe and the second subframe comprises one of: a predetermined value, a value indicated by radio resource control signaling; and a value indicated in the DCI.
  • Example 29 may include an apparatus for use in a user equipment (UE) in a wireless communication network, the apparatus comprising receive circuitry to receive an indication of a channel state information reference signal (CSI ⁇ RS) configuration, and receive a first CSI ⁇ RS based on the received indication, wherein the first CSI ⁇ RS is mapped as symbols of a self ⁇ contained subframe structure, and control circuitry to determine channel state information based on the received CSI ⁇ RS symbols.
  • CSI ⁇ RS channel state information reference signal
  • Example 30 may include the apparatus of example 29, wherein the indication of CSI ⁇ RS configuration comprises one of: downlink control information (DCI) ; or radio resource control (RRC) signaling.
  • DCI downlink control information
  • RRC radio resource control
  • Example 31 may include the apparatus of example 29 or example 30, wherein the first CSI ⁇ RS is mapped to at least one of: symbols between a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) in a type 1 self ⁇ contained subframe structure; and symbols between a physical downlink shared channel (PDSCH) and acknowledgement (ACK) symbols in a type 1 self ⁇ contained subframe structure.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • ACK acknowledgement
  • Example 32 may include the apparatus of example 29 or example 30, wherein the first CSI ⁇ RS is mapped to at least one of: symbols between a physical downlink control channel (PDCCH) and a gap region prior to a physical uplink shared channel (PUSCH) in a type 2 self ⁇ contained subframe structure; and a gap region after the PUSCH and acknowledgement (ACK) symbols in a type 2 self ⁇ contained subframe structure.
  • PDCCH physical downlink control channel
  • PUSCH physical uplink shared channel
  • ACK acknowledgement
  • Example 33 may include the apparatus of example 29 or example 30, wherein the received CSI ⁇ RS configuration comprises an indication that no CSI ⁇ RS is present in the allocated symbols of a subframe and the control circuitry to consider the allocated symbols as a gap region in response to the indication that no CSI ⁇ RS is present.
  • Example 34 may include the apparatus of example 29 or example 30, wherein the received CSI ⁇ RS configuration comprises an indication of symbols of a subframe reserved for the CSI ⁇ RS to be allocated for CSI reporting when no CSI ⁇ RS is to be transmitted, the apparatus further comprising transmit circuitry to transmit a CSI report in the allocated symbols of the subframe.
  • Example 35 may include the apparatus of example 29, wherein the received CSI ⁇ RS configuration comprises an indication of first CSI ⁇ RS mapped to symbols between a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) in a type 1 self ⁇ contained subframe structure and second CSI ⁇ RS mapped to symbols between a physical downlink shared channel (PDSCH) and acknowledgement (ACK) symbols in a type 1 self ⁇ contained subframe structure.
  • the received CSI ⁇ RS configuration comprises an indication of first CSI ⁇ RS mapped to symbols between a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) in a type 1 self ⁇ contained subframe structure and second CSI ⁇ RS mapped to symbols between a physical downlink shared channel (PDSCH) and acknowledgement (ACK) symbols in a type 1 self ⁇ contained subframe structure.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • ACK acknowledgement
  • Example 36 may include the apparatus of example 35, wherein the received CSI ⁇ RS configuration comprises an indication that the symbols reserved for the first CSI ⁇ RS are to provide periodical CSI reporting and the symbols reserved for the second CSI ⁇ RS are to provide aperiodical CSI reporting in a subframe when no CSI ⁇ RS is to be transmitted.
  • Example 37 may include the apparatus of example 29 or example 30 wherein the CSI ⁇ RS is mapped as a first number of symbols of the self ⁇ contained subframe structure, the first number of symbols comprising one of: a predetermined number of symbols; or a number of symbols configured using radio resource control (RRC) signaling.
  • RRC radio resource control
  • Example 38 may include the apparatus of example 36, the receive circuitry to receive downlink control information (DCI) comprising an indication to initiate aperiodical CSI reporting.
  • DCI downlink control information
  • Example 39 may include the apparatus of example 38, wherein the DCI comprises a CSI trigger value, the CSI trigger value indicating a beam pattern of the CSI ⁇ RS.
  • Example 40 may include the apparatus of example 39, wherein the CSI trigger value comprises a plurality of bits.
  • Example 41 may include the apparatus of example 39 or example 40, wherein the CSI trigger value comprises a predetermined value to indicate that no aperiodical CSI ⁇ RS is present in the current subframe.
  • Example 42 may include the apparatus of example 36, the receive circuitry to receive downlink control information (DCI) comprising an indication of a transmission beam group associated with each CSI ⁇ RS symbol in the current subframe to be used for periodical CSI reporting.
  • DCI downlink control information
  • Example 43 may include the apparatus of example 36, the receive circuitry to receive downlink control information (DCI) comprising an indication of a semi ⁇ persistent scheduling grant to be used for periodical CSI reporting.
  • DCI downlink control information
  • Example 44 may include the apparatus of example 43, wherein the DCI further comprises an indication that interference averaging is to be applied to the CSI ⁇ RS symbols.
  • Example 45 may include the apparatus of example 36, the receive circuitry to receive downlink control information (DCI) comprising an indication of at least one resource block to be used for aperiodical CSI reporting in a second subframe later than a first subframe in which the DCI is transmitted.
  • DCI downlink control information
  • Example 46 may include the apparatus of example 45, wherein a subframe offset comprising a number of subframes between the first subframe and the second subframe comprises one of: a predetermined value, a value indicated by radio resource control signaling; and a value indicated in the DCI.
  • Example 47 may include a computer program product comprising computer program code that when executed implements the steps of generating first channel state information reference signals (CSI ⁇ RS) , mapping the generated CSI ⁇ RS as symbols of a self ⁇ contained subframe structure, and transmitting the mapped CSI ⁇ RS symbols.
  • CSI ⁇ RS channel state information reference signals
  • Example 48 may include a computer program product comprising computer program code that when executed implements the steps of receiving an indication of a channel state information reference signal (CSI ⁇ RS) configuration, receiving a first CSI ⁇ RS based on the received indication, wherein the first CSI ⁇ RS is mapped as symbols of a self ⁇ contained subframe structure, and determining channel state information based on the received CSI ⁇ RS symbols.
  • CSI ⁇ RS channel state information reference signal
  • Example 49 may include a user equipment (UE) comprising the apparatus of any of examples 19 to 46, the UE further comprising at least one of a display; a keyboard; and a touchscreen.
  • UE user equipment
  • Example 50 may include an apparatus for use in an eNB in a wireless communication network, the apparatus comprising control circuitry to generate first channel state information reference signals (CSI ⁇ RS) , map the generated CSI ⁇ RS as symbols of a self ⁇ contained subframe structure, and cause the mapped CSI ⁇ RS symbols to be transmitted.
  • CSI ⁇ RS channel state information reference signals
  • Example 51 may include an apparatus for use in a user equipment (UE) in a wireless communication network, the apparatus comprising control circuitry to obtain an indication of a channel state information reference signal (CSI ⁇ RS) configuration, obtain a first CSI ⁇ RS based on the obtained indication, wherein the first CSI ⁇ RS is mapped as symbols of a self ⁇ contained subframe structure, and determine channel state information based on the obtained CSI ⁇ RS symbols.
  • CSI ⁇ RS channel state information reference signal

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Abstract

L'invention concerne des procédés et un appareil pour contrôler une signalisation de signaux de référence d'informations d'état de canal dans un système de communication sans fil, comprenant un appareil devant être utilisé dans un eNB dans un réseau de communication sans fil. L'appareil comprend une circuiterie de commande pour générer des premiers signaux de référence d'informations d'état de canal (CSI-RS) et mapper les CSI-RS générés en tant que des symboles d'une structure de sous-trame autonome, et une circuiterie de transmission couplée à la circuiterie de commande, la circuiterie de transmission étant utilisée pour transmettre les symboles CSI-RS mappés.
PCT/CN2016/077515 2016-03-28 2016-03-28 Appareil et procédé de contrôle de signalisation de csi-rs Ceased WO2017166024A1 (fr)

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PCT/CN2016/077515 WO2017166024A1 (fr) 2016-03-28 2016-03-28 Appareil et procédé de contrôle de signalisation de csi-rs

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