[go: up one dir, main page]

US20160056877A1 - Method and apparatus for reporting channel state information in wireless communication system - Google Patents

Method and apparatus for reporting channel state information in wireless communication system Download PDF

Info

Publication number
US20160056877A1
US20160056877A1 US14/779,307 US201414779307A US2016056877A1 US 20160056877 A1 US20160056877 A1 US 20160056877A1 US 201414779307 A US201414779307 A US 201414779307A US 2016056877 A1 US2016056877 A1 US 2016056877A1
Authority
US
United States
Prior art keywords
csi
subframe
reporting
downlink
uplink
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US14/779,307
Other languages
English (en)
Inventor
Inkwon Seo
Seungmin Lee
Hanbyul Seo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Priority to US14/779,307 priority Critical patent/US20160056877A1/en
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, SEUNGMIN, SEO, HANBYUL, SEO, INKWON
Publication of US20160056877A1 publication Critical patent/US20160056877A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • 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
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H04W72/0406—
    • H04W72/0493—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • 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
    • H04L5/0057—Physical resource allocation for CQI
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing

Definitions

  • the present invention relates to a wireless communication system and, more particularly, to a method and apparatus for reporting channel state information.
  • a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmit power, etc.).
  • Multiple access systems include, for example, a Code Division Multiple Access (CDMA) system, a Frequency Division Multiple Access (FDMA) system, a Time Division Multiple Access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, a Single-Carrier Frequency Division Multiple Access (SC-FDMA) system, and a Multi-Carrier Frequency Division Multiple Access (MC-FDMA) system.
  • CDMA Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA Single-Carrier Frequency Division Multiple Access
  • MC-FDMA Multi-Carrier Frequency Division Multiple Access
  • An object of the present invention is to provide a method for reporting channel state information in a system using subframes through usage change in Time Division Duplex (TDD).
  • TDD Time Division Duplex
  • CSI Channel State Information
  • UE User Equipment
  • a method for performing Channel State Information (CSI) reporting by a User Equipment (UE) in a wireless communication system including receiving a downlink signal including an uplink grant; and performing CSI reporting when a CSI request field included in the downlink signal triggers CSI reporting, wherein triggering of CSI reporting indicates a subframe set to which CSI reporting is related among one or more subframe sets configured for the UE.
  • CSI Channel State Information
  • a User Equipment for reporting a Channel State Information (CSI)-Reference Signal (RS) in a wireless communication system, including a reception module; and a processor, wherein the processor is configured to receive a downlink signal including an uplink grant and perform CSI reporting when a CSI request field included in the downlink signal triggers CSI reporting, and wherein triggering of CSI reporting indicates a subframe set to which CSI reporting is related among one or more subframe sets configured for the UE.
  • CSI Channel State Information
  • RS Channel State Information-Reference Signal
  • the first and second technical aspects of the present invention may include the following.
  • CSI reporting may be related only to one subframe set among the one or more subframe sets.
  • the one subframe set may be indicated by a value of the CSI request field.
  • a relationship between the value of the CSI request field and the subframe set may be indicated by higher layer signaling.
  • the the value of the CSI request field may indicate a CSI process associated with the subframe set.
  • a relationship between the subframe set and the CSI process may be indicated by higher layer signaling.
  • a subframe in which the downlink signal is received may be indicated to be used for uplink on system information.
  • the one or more subframe sets may be related to a subframe usage change according to an uplink-downlink configuration indicated on system information.
  • the downlink signal may be either uplink downlink control information or a random access response grant.
  • a transmission mode configured for the UE may be one of transmission modes 1 to 10.
  • the value of the CSI request field may indicate four states.
  • the CSI request field may be extended to two bits for the four states.
  • CSI reporting may be transmitted over a Physical Uplink Shared Channel (PUSCH).
  • PUSCH Physical Uplink Shared Channel
  • accurate channel state information can be reported by reflecting interference characteristics through usage change of subframes in TDD.
  • FIG. 1 is a diagram illustrating the structure of a radio frame.
  • FIG. 2 is a diagram illustrating a resource grid in a downlink slot.
  • FIG. 3 is a diagram illustrating the structure of a downlink subframe.
  • FIG. 4 is a diagram illustrating the structure of an uplink subframe.
  • FIG. 5 is a diagram for explaining a reference signal.
  • FIG. 6 is a diagram for explaining a channel state information reference signal.
  • FIG. 7 is a diagram for explaining a system to which an embodiment of the present invention is applicable.
  • FIGS. 8 and 9 are diagrams for explaining an embodiment of the present invention.
  • FIG. 10 is a diagram illustrating the construction of a transmission apparatus and a reception apparatus.
  • the BS is a terminal node of a network, which communicates directly with a UE.
  • a specific operation described as performed by the BS may be performed by an upper node of the BS.
  • BS may be replaced with the term ‘fixed station’, ‘Node B’, ‘evolved Node B (eNode B or eNB)’, ‘Access Point (AP)’, etc.
  • AP Access Point
  • BS may be replaced with the term ‘fixed station’, ‘Node B’, ‘evolved Node B (eNode B or eNB)’, ‘Access Point (AP)’, etc.
  • AP Access Point
  • the term ‘relay’ may be replaced with the term ‘Relay Node (RN)’ or ‘Relay Station (RS)’.
  • terminal may be replaced with the term ‘UE’, ‘Mobile Station (MS)’, ‘Mobile Subscriber Station (MSS)’, ‘Subscriber Station (SS)’, etc.
  • the embodiments of the present invention can be supported by standard documents disclosed for at least one of wireless access systems, Institute of Electrical and Electronics Engineers (IEEE) 802, 3rd Generation Partnership Project (3GPP), 3GPP Long Term Evolution (3GPP LTE), LTE-Advanced (LTE-A), and 3GPP2. Steps or parts that are not described to clarify the technical features of the present invention can be supported by those documents. Further, all terms as set forth herein can be explained by the standard documents.
  • IEEE Institute of Electrical and Electronics Engineers
  • 3GPP 3rd Generation Partnership Project
  • 3GPP LTE 3GPP Long Term Evolution
  • LTE-A LTE-Advanced
  • 3GPP2 3rd Generation Partnership Project 2
  • Steps or parts that are not described to clarify the technical features of the present invention can be supported by those documents. Further, all terms as set forth herein can be explained by the standard documents.
  • CDMA Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • TDMA Time Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • CDMA may be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented as a radio technology such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented as a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved-UTRA (E-UTRA) etc.
  • UTRA is a part of Universal Mobile Telecommunications System (UMTS).
  • 3GPP LTE is a part of Evolved UMTS (E-UMTS) using E-UTRA.
  • 3GPP LTE employs OFDMA for downlink and SC-FDMA for uplink.
  • LTE-A is an evolution of 3GPP LTE.
  • WiMAX can be described by the IEEE 802.16e standard (Wireless Metropolitan Area Network (WirelessMAN)-OFDMA Reference System) and the IEEE 802.16m standard (WirelessMAN-OFDMA Advanced System). For clarity, this application focuses on the 3GPP LTE and LTE-A systems. However, the technical features of the present invention are not limited thereto.
  • uplink and/or downlink data packets are transmitted in subframes.
  • One subframe is defined as a predetermined time period including a plurality of OFDM symbols.
  • the 3GPP LTE standard supports a type-1 radio frame structure applicable to Frequency Division Duplex (FDD) and a type-2 radio frame structure applicable to Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • FIG. 1( a ) illustrates the type-1 radio frame structure.
  • a downlink radio frame is divided into 10 subframes. Each subframe is further divided into two slots in the time domain.
  • a unit time during which one subframe is transmitted is defined as a Transmission Time Interval (TTI).
  • TTI Transmission Time Interval
  • one subframe may be lms in duration and one slot may be 0.5 ms in duration.
  • a slot includes a plurality of OFDM symbols in the time domain and a plurality of Resource Blocks (RBs) in the frequency domain. Because the 3GPP LTE system adopts OFDMA for downlink, an OFDM symbol represents one symbol period. An OFDM symbol may be referred to as an SC-FDMA symbol or symbol period.
  • An RB is a resource allocation unit including a plurality of contiguous subcarriers in a slot.
  • the number of OFDM symbols in one slot may vary depending on a Cyclic Prefix (CP) configuration.
  • CP Cyclic Prefix
  • the normal CP one slot includes 7 OFDM symbols.
  • the extended CP the length of one OFDM symbol is increased and thus the number of OFDM symbols in a slot is smaller than in the case of the normal CP.
  • the extended CP for example, 6 OFDM symbols may be included in one slot.
  • the extended CP may be used to further decrease Inter-Symbol Interference (ISI).
  • ISI Inter-Symbol Interference
  • one subframe includes 14 OFDM symbols because one slot includes 7 OFDM symbols.
  • the first two or three OFDM symbols of each subframe may be allocated to a Physical Downlink Control CHannel (PDCCH) and the other OFDM symbols may be allocated to a Physical Downlink Shared Channel (PDSCH).
  • PDCCH Physical Downlink Control CHannel
  • PDSCH Physical Downlink Shared Channel
  • FIG. 1( b ) illustrates the type-2 radio frame structure.
  • a type-2 radio frame includes two half frames, each having 5 subframes, a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an Uplink Pilot Time Slot (UpPTS). Each subframe is divided into two slots.
  • the DwPTS is used for initial cell search, synchronization, or channel estimation at a UE.
  • the UpPTS is used for channel estimation and acquisition of uplink transmission synchronization to a UE at an eNB.
  • the GP is a period between an uplink and a downlink, which eliminates uplink interference caused by multipath delay of a downlink signal.
  • One subframe includes two slots irrespective of the type of a radio frame.
  • radio frame structures are purely exemplary and thus it is to be noted that the number of subframes in a radio frame, the number of slots in a subframe, or the number of symbols in a slot may vary.
  • FIG. 2 illustrates the structure of a downlink resource grid for the duration of one downlink slot.
  • a downlink slot includes 7 OFDM symbols in the time domain and an RB includes 12 subcarriers in the frequency domain, which does not limit the scope and spirit of the present invention.
  • a downlink slot may include 7 OFDM symbols in the case of the normal CP, whereas a downlink slot may include 6 OFDM symbols in the case of the extended CP.
  • Each element of the resource grid is referred to as a Resource Element (RE).
  • An RB includes 12 ⁇ 7 REs.
  • the number of RBs in a downlink slot, NDL depends on a downlink transmission bandwidth.
  • An uplink slot may have the same structure as a downlink slot.
  • FIG. 3 illustrates the structure of a downlink subframe.
  • Up to three OFDM symbols at the start of the first slot in a downlink subframe are used for a control region to which control channels are allocated and the other OFDM symbols of the downlink subframe are used for a data region to which a PDSCH is allocated.
  • Downlink control channels used in the 3GPP LTE system include a Physical Control Format Indicator CHannel (PCFICH), a Physical Downlink Control CHannel (PDCCH), and a Physical Hybrid automatic repeat request (HARQ) Indicator CHannel (PHICH).
  • PCFICH Physical Control Format Indicator CHannel
  • PDCH Physical Downlink Control CHannel
  • HARQ Physical Hybrid automatic repeat request
  • PHICH Physical Hybrid automatic repeat request
  • the PHICH delivers an HARQ ACKnowledgment/Negative ACKnowledgment (ACK/NACK) signal in response to an uplink transmission.
  • Control information carried on the PDCCH is called Downlink Control Information (DCI).
  • DCI transports uplink or downlink scheduling information, or uplink transmission power control commands for UE groups.
  • the PDCCH delivers information about resource allocation and a transport format for a Downlink Shared CHannel (DL-SCH), resource allocation information about an Uplink Shared CHannel (UL-SCH), paging information of a Paging CHannel (PCH), system information on the DL-SCH, information about resource allocation for a higher-layer control message such as a Random Access Response transmitted on the PDSCH, a set of transmission power control commands for individual UEs of a UE group, transmission power control information, Voice Over Internet Protocol (VoIP) activation information, etc.
  • a plurality of PDCCHs may be transmitted in the control region.
  • a UE may monitor a plurality of PDCCHs.
  • a PDCCH is formed by aggregating one or more consecutive Control Channel Elements (CCEs).
  • a CCE is a logical allocation unit used to provide a PDCCH at a coding rate based on the state of a radio channel.
  • a CCE includes a plurality of RE groups.
  • the format of a PDCCH and the number of available bits for the PDCCH are determined according to the correlation between the number of CCEs and a coding rate provided by the CCEs.
  • An eNB determines the PDCCH format according to DCI transmitted to a UE and adds a Cyclic Redundancy Check (CRC) to control information.
  • the CRC is masked by an Identifier (ID) known as a Radio Network Temporary Identifier (RNTI) according to the owner or usage of the PDCCH.
  • ID Identifier
  • RNTI Radio Network Temporary Identifier
  • the PDCCH is directed to a specific UE, its CRC may be masked by a cell-RNTI (C-RNTI) of the UE. If the PDCCH is for a paging message, the CRC of the PDCCH may be masked by a Paging Indicator Identifier (P-RNTI). If the PDCCH carries system information, particularly, a System Information Block (SIB), its CRC may be masked by a system information ID and a System Information RNTI (SI-RNTI). To indicate that the PDCCH carries a Random Access Response in response to a Random Access Preamble transmitted by a UE, its CRC may be masked by a Random Access-RNTI (RA-RNTI).
  • SIB System Information Block
  • SI-RNTI System Information RNTI
  • RA-RNTI Random Access-RNTI
  • FIG. 4 illustrates the structure of an uplink subframe.
  • An uplink subframe may be divided into a control region and a data region in the frequency domain.
  • a Physical Uplink Control CHannel (PUCCH) carrying uplink control information is allocated to the control region and a Physical Uplink Shared Channel (PUSCH) carrying user data is allocated to the data region.
  • PUCCH Physical Uplink Control CHannel
  • PUSCH Physical Uplink Shared Channel
  • a UE does not transmit a PUSCH and a PUCCH simultaneously.
  • a PUCCH for a UE is allocated to an RB pair in a subframe. The RBs of the RB pair occupy different subcarriers in two slots. Thus it is said that the RB pair allocated to the PUCCH is frequency-hopped over a slot boundary.
  • RSs Reference Signals
  • a packet is transmitted on a radio channel.
  • the packet may be distorted during the transmission.
  • a receiver should compensate for the distortion of the received signal using channel information.
  • a transmitter transmits a signal known to both the transmitter and the receiver and the receiver acquires knowledge of channel information based on the distortion of the signal received on the radio channel. This signal is called a pilot signal or an RS.
  • Tx Transmission
  • Rx Reception
  • the RSs may be divided into downlink RSs and uplink RSs.
  • the uplink RSs include:
  • DM-RS DeModulation-Reference Signal
  • SRS Sounding Reference Signal
  • the downlink RSs are categorized into:
  • CRS Cell-specific Reference Signal
  • DM-RS used for coherent demodulation of a PDSCH, when the PDSCH is transmitted;
  • CSI-RS Channel State Information-Reference Signal
  • Multimedia Broadcast Single Frequency Network (MBSFN) RS used for coherent demodulation of a signal transmitted in MBSFN mode
  • RSs may also be divided into two types according to their purposes: RS for channel information acquisition and RS for data demodulation. Since its purpose lies in that a UE acquires downlink channel information, the former should be transmitted in a broad band and received even by a UE that does not receive downlink data in a specific subframe. This RS is also used in a situation like handover. The latter is an RS that an eNB transmits along with downlink data in specific resources. A UE can demodulate the data by measuring a channel using the RS. This RS should be transmitted in a data transmission area.
  • CRSs serve two purposes, that is, channel information acquisition and data demodulation.
  • a UE-specific RS is used only for data demodulation.
  • CRSs are transmitted in every subframe in a broad band and CRSs for up to four antenna ports are transmitted according to the number of Tx antennas in an eNB.
  • CRSs for antenna ports 0 and 1 are transmitted.
  • CRSs for antenna ports 0 to 3 are respectively transmitted.
  • FIG. 5 illustrates patterns in which CRSs and DRSs are mapped to a downlink RB pair, as defined in a legacy 3GPP LTE system (e.g. conforming to Release-8).
  • An RS mapping unit i.e. a downlink RB pair may include one subframe in time by 12 subcarriers in frequency. That is, an RB pair includes 14 OFDM symbols in time in the case of the normal CP (see FIGS. 5( a )) and 12 OFDM symbols in time in the case of the extended CP (see FIG. 5( b )).
  • FIG. 5 the positions of RSs in an RB pair for a system where an eNB supports four Tx antennas are illustrated.
  • Reference numerals 0 , 1 , 2 and 3 denote the REs of CRSs for first to fourth antenna ports, antenna port 0 to antenna port 3, respectively, and reference character ‘D’ denotes the positions of DRSs.
  • CSI-RS Channel State Information-RS
  • CSI-RS is an RS used for channel measurement in an LTE-A system supporting up to eight antenna ports on downlink.
  • CSI-RS differs in this aspect from CRS used for both channel measurement and data demodulation and thus it is not necessary to transmit CSI-RSs in every subframe like CRSs.
  • CSI-RS is used in Transmission Mode 9.
  • DM-RS is used for data demodulation.
  • CSI-RSs may be transmitted through 1, 2, 4 or 8 antenna ports.
  • Antenna port 15 may be used for one antenna port, antenna ports 15 and 16 for two antenna ports, antenna ports 15 to 18 for four antenna ports, and antenna ports 15 to 22 for eight antenna ports.
  • CSI-RSs may be generated by the following [Equation 1].
  • r l,n s (m) denotes the generated CSI-RSs
  • c(i) denotes a pseudo-random sequence
  • n s is a slot number
  • l is an OFDM symbol index
  • N RB max,DL denotes the maximum number of RBs in a downlink bandwidth.
  • the CSI-RSs generated by [Equation 1] may be mapped to REs on a per-antenna port basis by the following equation.
  • k′ and l′ may be determined according to CSI-RS configurations as illustrated in [Table 1].
  • a specific CSI-RS is mapped to an RE according to each antenna port.
  • a CSI-RS is mapped with respect to each antenna port according to the above description.
  • R 0 to R 3 represent mapping of CRSs for respective antenna ports and numbers denote mapping of CSI-RSs for respective antenna ports.
  • an RE denoted by number 0 or 1 indicates that a CSI-RS corresponding to antenna port 0 or 1 is mapped.
  • CSI-RSs corresponding to two antenna ports are mapped to the same RE and this may be distinguished by different orthogonal codes.
  • the CSI-RSs may not be transmitted in every subframe but may be transmitted in a specific subframe. More specifically, the CSI-RSs may be transmitted in a subframe satisfying Equation 3 below by referring to a CSI-RS subframe configuration shown in Table 2.
  • CSI-RS CSI-RS subframe periodicity T CSI-RS offset ⁇ CSI-RS CSI-RS-SubframeConfig I CSI-RS (subframes) (subframes) 0-4 5 I CSI-RS 5-14 10 I CSI-RS -5 15-34 20 I CSI-RS -15 35-74 40 I CSI-RS -35 75-154 80 I CSI-RS -75
  • T CSI-RS denotes the transmission period of CSI-RSs
  • ⁇ CSI-RS is an offset
  • n f is a system frame number
  • n s is a slot number
  • CSI-RSs may be signaled to a UE in a CSI-RS configuration Information Element (IE) (CSI-RS-Config-r10) described in [Table 3] below.
  • IE CSI-RS configuration Information Element
  • CSI-RS-Config-r10 SEQUENCE ⁇ csi-RS-r10 CHOICE ⁇ release NULL, setup SEQUENCE ⁇ antennaPortsCount-r10 ENUMERATED ⁇ an1, an2, an4, an8 ⁇ , resourceConfig-r10 INTEGER (0..31), subframeConfig-r10 INTEGER (0..154), p-C-r10 INTEGER ( ⁇ 8..
  • ‘antennaPortsCount-r10’ indicates the number of antennas through which CSI-RSs are transmitted (one of 1, 2, 4 and 8 is selected), and ‘resourceConfig-r10’ specifies REs carrying the CSI-RSs in one RB in the time-frequency domain.
  • ‘subframeConfig-r10’ indicates a subframe carrying the CSI-RSs and the ratio of a CSI-RS Energy Per Resource Element (EPRE) to a PDSCH EPRE.
  • the eNB transmits information about zero-power CSI-RSs.
  • ‘resourceConfig-r10’ indicates the positions of the CSI-RSs. Specifically, ‘resourceConfig-r10’ indicates the positions of symbols and subcarriers carrying the CSI-RSs in one RB according to a CSI-RS configuration number ranging from 0 to 31 in [Table 1].
  • MIMO can be categorized into an open-loop scheme and a closed-loop scheme.
  • the open-loop scheme performs MIMO transmission at a transmitter without feedback of CSI from a MIMO receiver
  • the closed-loop scheme performs MIMO transmission at the transmitter using feedback of CSI from the MIMO receiver.
  • each of the transmitter and the receiver may perform beamforming based on CSI to obtain multiplexing gain of MIMO transmit antennas.
  • the transmitter e.g., eNB
  • CSI fed back may include a Rank Indicator (RI), a Precoding Matrix Index (PMI), and a Channel Quality Indictor (CQI).
  • RI Rank Indicator
  • PMI Precoding Matrix Index
  • CQI Channel Quality Indictor
  • the RI indicates information about a channel rank.
  • the channel rank represents a maximum number of layers (or streams) through which different pieces of information may be transmitted through the same time-frequency resource.
  • the RI is mainly determined by long term fading of a channel and, thus, the RI may be fed back at a longer period relative to the PMI and CQI.
  • the PMI is information about a precoding matrix used for transmission from the transmitter and is a value in which spatial characteristics of a channel are reflected.
  • Precoding refers to mapping a transport layer to a transmit antenna.
  • a layer-to-antenna mapping relation may be determined by a precoding matrix.
  • the PMI indicates a precoding matrix index of an eNB preferred by a UE based on a metric such as Signal-to-Interference plus Noise Ratio (SINR).
  • SINR Signal-to-Interference plus Noise Ratio
  • the transmitter and receiver may share a codebook including various precoding matrices and only an index indicating a specific precoding matrix in the codebook may be fed back.
  • MU-MIMO Multi-User MIMO
  • SU-MIMO Single User MIMO
  • a new CSI feedback scheme that improves CSI composed of the RI, PMI, and CQI may be applied in order to measure and report more accurate CSI.
  • precoding information fed back by the receiver may be indicated by a combination of two PMIs.
  • One (first PMI) of the two PMIs has long term and/or wideband attributes and may be referred to as W 1 .
  • the other PMI (second PMI) of the two PMIs has short term and/or subband attributes and may be referred to as W 2 .
  • the CQI is information indicating channel quality or channel strength.
  • the CQI may be represented by an index corresponding to a combination of predetermined MCSs. That is, a feedback CQI index may indicate a modulation scheme and a code rate.
  • the CQI is a value reflecting a reception SNR capable of being obtained when the eNB configures a spatial channel using the PMI.
  • the CSI feedback scheme is divided into periodic reporting through a PUCCH, which is an uplink control channel, and aperiodic reporting through a PUSCH, which is an uplink data channel, performed at the request of an eNB.
  • the current LTE/LTE-A system defines a CSI reference resource related to channel measurement for the above-described CSI feedback/reporting.
  • the CSI reference resource is defined as a group of physical RBs corresponding to a frequency band with which a calculated CQI is associated.
  • the CSI reference resource is defined as n-n CQI — ref where n is a subframe in which the CSI is to be transmitted/reported.
  • n-n CQI ref is i) the smallest value among values greater than or equal to 4, which is a valid downlink subframe for periodic CSI reporting, ii) a valid subframe corresponding to a subframe in which a CSI request in a DCI format is transmitted for aperiodic CSI reporting, or iii) 4 in the case of a CSI request in a random access response grant for aperiodic CSI reporting.
  • a subframe is considered valid when it is configured as a downlink subframe for a particular UE, it is not a multicast broadcast single frequency network (MBSFN) subframe except for transmission mode 9 , it contains a DwPTS with a predetermined size or more in TDD, it is not included in a measurement gap configured for the UE, and it should be an element of a CSI subframe set when that UE is configured with CSI subframe sets for periodic CSI reporting.
  • CSI subframe sets (C CSI,0 , C CSI,1 ) may be configured for the UE by a higher layer.
  • the CSI reference resource may be included in any one of two subframes sets (C CSI,0 , C CSI,0 ) (hereinafter, C CSI,0 is referred to as CO and C CSI,1 is referred to as C 1 , for convenience) but may not be included in both sets.
  • eIMTA Enhanced Interference Management and Traffic Adaptation
  • subframes may be preconfigured to be used for either uplink or downlink.
  • subframe numbers 0 and 5 are preconfigured to be used for downlink
  • subframe numbers 2 , 3 , 4 , 7 , 8 , and 9 are preconfigured to be used for uplink in one radio frame.
  • An uplink-downlink configuration to be used by a specific eNB may be provided to a UE as a part of system information (e.g., SIB 1 ).
  • SIB 1 system information
  • neighboring eNBs may be forced to use the same TDD configuration, i.e., the same uplink-downlink configuration as that used by the specific eNB, for reasons of interference etc.
  • one or more subframes configured for uplink may be changed to subframes for downlink or one or more subframes configured for downlink may be changed/switched to subframes for uplink for smooth transmission of data, thereby raising efficiency.
  • Switching from an uplink subframe to a downlink subframe may be performed in subframes shaded in Table 5 below.
  • Table 6 shows the case in which a switching period is permitted to be changed and subframes that can be used through switching to downlink subframes when the switching period is not allowed to be changed are shaded.
  • Switching from uplink subframes to downlink subframes may be performed when an existing TDD configuration is satisfied.
  • a TDD uplink-downlink configuration after switching should be any one of the uplink-downlink configurations of Table 4. For example, if subframe number 4 in uplink-downlink configuration 0 is switched to a downlink subframe, subframe number 9 should also be switched to a downlink subframe. This has an advantage of indicating whether an uplink-downlink configuration is switched through one bit.
  • subframes may be divided into two types/sorts: flexible subframes (subframes in which a duplex direction can be changed or subframes in which a changed duplex direction is used (for a predetermined time, e.g., for a switching period of an uplink-downlink configuration of SIB 1 ) as an eNB is needed) and static subframes.
  • a static subframe and a flexible subframe may have different interference characteristics or different power characteristics. For example, referring to FIG. 7 , FIG.
  • FIG. 7( a ) illustrates an example of a static subframe in which UEs transmit uplink signals to eNBs according to the same uplink-downlink configuration of a first eNB eNB1 and a second eNB eNB2
  • FIG. 7( b ) illustrates an example of a flexible subframe in which the first eNB uses an uplink subframe as a downlink subframe through usage change.
  • an uplink signal transmitted by a second UE UE 2 may function as large interference with respect to a first UE UE 1 .
  • transmit power may be changed in the flexible subframe. For example, in FIG.
  • a downlink signal transmitted by the first eNB may serve as interference with respect to the second eNB and, in order to reduce this influence, the second eNB may cause the second UE to transmit the signal at higher transmit power than transmit power in the static subframe.
  • the second eNB may cause the second UE to transmit the signal at higher transmit power than transmit power in the static subframe.
  • two or more subframe sets may be configured for the UE so as to perform CSI reporting.
  • Aperiodic CSI reporting may be performed by a UE when a CSI request field included in a downlink signal including an uplink grant (e.g., DCI formats 0 and 4 including the uplink grant or a random access response including the uplink grant) triggers CSI reporting. If CSI reporting is performed with respect to a subframe set including a subframe for which CSI reporting is triggered, CSI reporting may not be performed with respect to a specific subframe set.
  • an uplink grant e.g., DCI formats 0 and 4 including the uplink grant or a random access response including the uplink grant
  • the UE may not perform CSI reporting for a flexible subframe set because an uplink grant is not transmitted in the flexible subframe in eIMTA.
  • a triggering method of CSI reporting when two or more subframe sets are configured for the UE and configuration of a CSI reference resource according to the proposed CSI reporting triggering method will be described hereinbelow.
  • the UE may be a UE capable of receiving a downlink signal in a subframe used differently from a subframe of an uplink-downlink configuration indicated by system information, i.e., an eIMTA UE.
  • the following description may be applied only to an operation of eIMTA, i.e., the case in which transmission is performed in a different direction from a direction of an uplink-downlink configuration indicated by an SIB.
  • values for triggering CSI reporting may also indicate specific subframe sets and a (mapping) relationship between the values of the CSI request field and the subframe sets may be indicated by higher layer signaling (after being determined by an eNB/network). For example, among values of a 2-bit CSI request field (the CSI request field may have four states.
  • the 1-bit CSI request field may be increased/expanded to 2 bits or one bit may be added to the 1-bit CSI request field in order to indicate four states), each of values (e.g., 01, 10, and 11) for triggering CSI reporting may indicate a specific subframe set.
  • a value of the CSI request field may indicate only one specific subframe set and, in this case, CSI reporting may be related only to one subframe set among one or more subframe sets configured for a UE.
  • the value of the CSI request field may indicate a subframe set for which CSI reporting is to be performed and simultaneously indicate a CSI process associated with the corresponding subframe set.
  • the value of the CSI request field may indicate a subframe set and/or a CSI process for which CSI reporting is to be performed.
  • a relationship between the value of the CSI request field and the subframe set and/or the CSI process may be indicated by higher layer signaling/Radio Resource Control (RRC) signaling or may be predetermined. This may also be applied even to a Carrier Aggregation (CA) situation.
  • RRC Radio Resource Control
  • CA Carrier Aggregation
  • an eNB may request that the UE report CSI for a specific subframe set of (a specific CSI process) of a specific component carrier through a combination of subframe sets and/or CSI processes.
  • a field may be added to a downlink signal (DCI formats 0 and 4) transmitting an uplink grant and a subframe set may be indicated by this field.
  • DCI formats 0 and 4 DCI formats 0 and 4
  • a new field for increasing the number of bits of an existing CQI field or including a more number of bits than the number of bits of the existing CQI field may be defined.
  • the new field may be useful when eIMTA is applied to a PCell and an SCell, i.e., when an uplink-downlink configuration is reconfigured in the PCell and the SCell.
  • the eNB may request that the UE report CSI for a specific subframe set among subframes belonging to a specific CSI process of a specific component carrier.
  • N component carriers are present, “M” CSI processes are configured (it is assumed that CSI processes of the same number are configured in all component carriers), and four subframe sets (according to signal/interference characteristics) are defined, a total of 4 ⁇ N ⁇ M states is needed and a configuration for each state may be signaled to the UE through higher layer signaling. (When the number of bits of an existing CQI request field is maintained, a valid combination selected by the eNB may be signaled to the UE through higher layer signaling.) The eNB may also request that the UE report CSI for a specific subframe set in a specific CSI process of a specific component carrier through a combination of information of the existing CQI request field and additional information of a new field.
  • a specific component carrier and a specific CSI process may be configured by the existing CQI field and information about a specific subframe set in the corresponding CSI process may be indicated through an additional field. That is, subframe set information generated by eIMTA may be additionally signaled.
  • a subframe set associated with CSI reporting is determined by information related to/transmitted along with an uplink grant regardless of to which subframe set a subframe transmitting the uplink grant belongs.
  • a subframe to which CSI reporting is related may be determined according to a subframe in which an uplink grant for activating a CSI request is received. For example, if a subframe in which the uplink grant is received is included in a static subframe set, CSI reporting may be performed with respect to a static subframe set. As mentioned above, since the uplink grant is not transmitted in a flexible subframe in eIMTA, it may be appreciated that, in the second method, CSI reporting for a specific subframe set (e.g., flexible subframe set) is not performed.
  • CSI for all subframe sets may be simultaneously reported.
  • a subframe set that should be subframe-specifically reported may be determined More specifically, any specific indication (this may be referred to as an A-CSI indication (SF) set or a CSI reporting set) may be indicated through higher layer signaling. According to this indication, CSI for a subframe set allocated to a subframe in which an uplink grant is transmitted (or a subframe for which CSI reporting is performed) may be reported.
  • A-CSI indication SF
  • CSI reporting set CSI for a subframe set allocated to a subframe in which an uplink grant is transmitted (or a subframe for which CSI reporting is performed) may be reported.
  • CSI triggering by subframe # 3 may be related to a flexible subframe set and CSI triggering by subframe # 4 may be related to a static subframe set.
  • a subframe type for which CSI is to be reported in each CSI process of each carrier component (and/or transmission point) may be preallocated to each downlink subframe and CSI allocated to a downlink subframe in which an uplink grant for activating a CSI request is received may be reported.
  • a CSI reference resource may be determined as follows.
  • the CSI reference resource may be a last subframe not later than a subframe (subframe n-k) which precedes subframe n, for which CSI is reported, by k subframes (where k may be 4) (i.e., may be a valid subframe among subframes prior to subframe n-k).
  • the last subframe may be a subframe included in a subframe set related to CSI reporting (i.e., a triggered subframe set).
  • the subframe set related to CSI reporting may be determined by one of the methods described above in “Triggering of CSI reporting”. For example, if the subframe set related to CSI reporting is determined by a value of a CSI request field, the above last subframe may be a subframe included in a subframe set determined by the value of the CSI request field.
  • the CSI reference resource may be a subframe that satisfies a condition that the subframe is included in a subframe set related to CSI reporting and a condition that the subframe is nearest to a subframe for which CSI reporting is performed among subframes which precede the subframe for which CSI reporting is performed by k subframes.
  • the CSI reference resource may be applied to a UE for which a single CSI process of transmission modes 1 to 9 or transmission mode 10 is configured.
  • the single CSI process may be comprised of one CSI-RS resource and one CSI Interference Measurement (CSI-IM) resource or one CSI-RS resource and two CSI-IM resources as described later.
  • CSI-IM CSI Interference Measurement
  • the CSI reference resource may also be applied to a plurality of CSI processes. For example, if two or more CSI processes are configured, the CSI reference resource may be a valid subframe among previous subframes including subframe n- 4 when two CSI processes are configured and may be a valid subframe among previous subframes including subframe n- 5 when three or more CSI processes are configured.
  • the CSI reference resource may be determined according to which subframe set a subframe in which an uplink grant is transmitted belongs.
  • the CSI reference resource may be a subframe which belongs to the same subframe set as a subframe set designated by the uplink grant and is nearest to the subframe set in time among subframes prior to subframe (n-k). If a subframe in which the uplink grant is transmitted is the same as a subframe set requested by the uplink grant, the CSI reference resource may be determined to be the subframe in which the uplink grant is transmitted.
  • CSI reporting may be omitted. This is because there is a difficulty in reflecting an actual channel state when a considerable time elapses from the subframe in which the uplink grant is transmitted.
  • the “subframe in which the uplink grant is transmitted” may be replaced with an “uplink subframe in which a response to the uplink grant is transmitted”. That is, in the above description, a reference time for determining the CSI reference resource is the subframe in which the uplink grant is transmitted and this reference time may be replaced with an uplink subframe in which a response to the uplink grant is transmitted.
  • Measurement performed in units of subframe sets may be distinguished by CSI-IM subsets.
  • an eNB may designate a multiport (e.g., 2-, 4-, or 8-port) CSI-RS configuration as CSI-IM and configure CSI-IM by two CSI-IM subsets, and a neighboring eNB may transmit signals corresponding to downlink transmission and uplink transmission in the two CSI-IM subsets.
  • a multiport e.g., 2-, 4-, or 8-port
  • CSI-IM e.g., 2-, 4-, or 8-port
  • an eNB may inform a UE of a CSI process in 8-port CSI-IM is included and two subsets (subset 0 and subset 1 ) included in the CSI-IM and may inform the UE of information (a subframe pattern for subframe-specific CSI reporting) regarding which CSI-IM subset is to be used when aperiodic CSI reporting is triggered.
  • the UE may select a CSI process to be reported by an uplink grant and determine a CSI-IM subset for which measurement is to be actually reported in the CSI process by a subframe index in which the uplink grant is transmitted. That is, in FIG. 8 , upon receiving the uplink grant in subframe # 0 , the UE may measure interference in CSI-IM subset 0 and upon receiving the uplink grant in subframe # 3 , the UE may measure interference in CSI-IM subset 1 .
  • the CSI process may be comprised of one CSI-RS configuration and two CSI-IM resources/configurations.
  • One CSI-IM configuration is divided into a plurality of subsets in the previous case, whereas two different CSI-IM resources/configurations are configured in this case.
  • each CSI-IM configuration may serve as a subframe set in the previous description and a subframe set index and an Interference Measurement Resource (IMR) configuration index may be interlocked.
  • IMR Interference Measurement Resource
  • a combination of one CSI-RS configuration and two CSI-IM configurations may constitute two CSI processes.
  • a combination of two CSI-RS configurations and two CSI-IM configurations may constitute two CSI processes.
  • the eNB may request that the UE report CSI for different signals/interference environments by configuring a CSI process corresponding to the subframe set in the above description.
  • the eNB may set up CSI-RS configurations 1 and 2 using CSI-RSs located in a static subframe and a dynamic subframe and set up a CSI-IM configuration in each of a flexible downlink subframe, a flexible uplink subframe, a static downlink subframe, and a static uplink subframe of a main interference cell.
  • the eNB may configure a plurality of CSI-RS processes through a combination of CSI-RS configurations and CSI-IM configurations and request that UE report CSI for a specific CSI process.
  • subframe sets related to reporting such as a subframe set related to enhanced Inter-Cell Interference Coordination (eICIC).
  • eICIC enhanced Inter-Cell Interference Coordination
  • priority of subframe sets for which CSI should be reported may be designated with respect to each CSI process (or commonly with respect to all CSI processes) or it may be predefined (semi-statically by higher layer signaling) that CSI for a specific CSI process and/or a specific subframe set is reported.
  • an uplink grant may designate a CSI process for which CSI is to be reported and a subframe set (or CSI-IM corresponding to the subframe set) for which CSI is to be reported may be designated by a subframe in which the uplink grant is transmitted.
  • a subframe set or CSI-IM corresponding to the subframe set
  • CSI processes may be designated such that CSI for all subframe sets of a specific CSI process is reported.
  • the subframe set may be designated according to each CSI process set (indicated by higher layer signaling) or may be commonly applied to all CSI process sets. Alternatively, priority for subframe sets may be determined according to each CSI process by the eNB.)
  • corresponding content may be included in an uplink-downlink reconfiguration message.
  • CSI for a flexible subframe set may be designated to be reported in aperiodic CSI reporting through the reconfiguration message, so that CSI for a static subframe set is reported in periodic CSI reporting and CSI for a flexible subframe set is reported in aperiodic CSI reporting.
  • the number of CSI processes designated for CSI reporting may be adjusted.
  • TDD for multiple CSI reporting, the number of CSI reported at a time and a location of a reference resource may be changed according to the number of CSI processes that should be reported.
  • the number of CSI processes may be applied based on the number of subframe sets. For example, an existing reference (i.e., the number of CSI processes) may be applied by assuming/regarding subframe sets per CSI process as respective CSI processes.
  • the UE may assume that four CSI processes are allocated to the corresponding CSI process set. (In this case, priority for the subframe sets may be assigned. For instance, a subframe set belonging to a low CSI process index may be reported first or indexing for the subframe sets may be performed to perform reporting starting from a low index.) If each subframe set is regarded as a CSI process, CSI reporting for some CSI processes (or subframe sets) may be restricted due to UE capabilities for the number of CSI processes that can be simultaneously reported.
  • reporting may be performed starting from a CSI process of a low index based on a new CSI process index.
  • the new CSI process index may be configured by the eNB (through higher layers signaling) or may be predefined. (The new CSI process index may be used only to indicate reported priority.) As an example, (if a maximum of two subframe sets is defined per CSI process,) indexing for subframe set 0 of each CSI process is performed first and indexing for subframe set 1 may be performed.
  • CSI that has not been reported due to a high index in previous reporting may be reported first and, if a reporting time and a measurement time differ by more than a predetermined time (e.g., a new reconfiguration time), corresponding CSI reporting may be omitted.
  • the predetermined time may be signaled by the eNB or may be predefined. The eNB may signal to the UE to omit specific CSI reporting irrespective of the predetermined time.
  • CSI for all subframe sets included in a CSI process belonging to each CSI process set may be simultaneously reported.
  • the number of CSI for a current timing at which actual reporting is performed may be limited by the number of CSI reporting that was not performed in the past.
  • CSI reporting may be additionally defined with respect to the case in which the number of CSI processes is 5 or more as well as to the case in which the number of CSI processes is two or three (in this process, the number of CSI processes may be counted in a subframe set level included in a CSI process.) and a value k for acquiring the reference resource may also be additionally designated according to the numbers of CSI processes and subframe sets.
  • a subframe set for measurement is transmitted by higher layer signaling, an operation in an ambiguity interval may be problematic.
  • the ambiguity interval may occur.
  • a subframe set that should be reported may be determined according to a type of a search space in which an uplink grant is transmitted as a fallback mode operation.
  • a subframe set for which reporting is performed may be predetermined or may be indicated by higher layer signaling.
  • CSI reporting for a first subframe set may be performed and, if the uplink grant is transmitted through a UE specific search space, CSI reporting for a second subframe set may be performed.
  • the number of CSI processes applied to periodic CSI reporting may differ from the number of CSI processes applied to aperiodic CSI reporting. For example, if four CSI processes are present and each CSI process includes two subframe sets, this may be regarded as 8 CSI processes.
  • the available CSI processes in periodic reporting may be predefined (i.e., a predetermined number of CSI processes determined in order of a low index is determined to be available as in the above example) or may be designated by the eNB through higher layer signaling (e.g., a specific subframe set of a specific CSI process may be designated or a part of newly indexed CSI processes may be designated). If reindexing is needed, indexing for new CSI processes may be predefined (e.g., indexed in ascending order starting from a subframe set belong to a CSI process of a low index) or may be indicated by the eNB to the UE through higher layer signaling.
  • the eNB may evenly distribute timings of periodic CSI reporting so that CSI for all newly indexed CSI processes may be reported.
  • the eNB may indicate each UE to perform aperiodic CSI reporting by reporting some or all newly defined CSI processes (i.e., a subframe set of eIMTA is defined as a CSI process) using the above-described method(s).
  • subframes used in a serving cell and a neighboring cell may be divided into a static uplink subframe (SU), a static downlink subframe (SD), a flexible uplink subframe (FU), and a flexible downlink subframe (FD). Therefore, 8 subframe sets may be configured as shown in Table 5 below.
  • the above description may be applied to CA. That is, in a CA situation, if different uplink-downlink configurations are used in a PCell and an SCell (additionally, if PCell and SCell have different static/flexible subframe configurations through different uplink-downlink reconfigurations), the above proposal may be used even for a CSI request for a specific (static/flexible) subframe set of each cell.
  • the eNB may request that the UE measure and report CSI for a specific subframe set (e.g., a subframe set including a static downlink subframe) of a specific component carrier. To this end, the eNB may inform the UE of subframe set information of each component carrier through higher layer signaling.
  • a specific subframe set e.g., a subframe set including a static downlink subframe
  • the eNB may inform the UE of subframe set information of each component carrier through higher layer signaling.
  • FIG. 10 is a diagram illustrating the construction of a transmission point apparatus and a UE apparatus according to an embodiment of the present invention.
  • a transmission point apparatus 10 may include a reception (Rx) module 11 , a transmission (Tx) module 12 , a processor 13 , a memory 14 , and a plurality of antennas 15 .
  • the plurality of antennas 15 indicates a transmission point apparatus for supporting MIMO transmission and reception.
  • the Rx module 11 may receive a variety of signals, data, and information on UL from the UE.
  • the Tx module 12 may transmit a variety of signals, data, and information on DL to the UE.
  • the processor 13 may control overall operation of the transmission point apparatus 10 .
  • the processor 13 of the transmission point apparatus 10 may operate to perform the above-mentioned embodiments.
  • the processor 13 of the transmission point apparatus 10 processes information received at the transmission point apparatus 10 and transmission information to be externally transmitted.
  • the memory 14 may store the processed information for a predetermined time.
  • the memory 14 may be replaced with a component such as a buffer (not shown).
  • a UE apparatus 20 may include an Rx module 21 , a Tx module 22 , a processor 23 , a memory 24 , and a plurality of antennas 25 .
  • the plurality of antennas 25 indicates a UE apparatus supporting MIMO transmission and reception.
  • the Rx module 21 may receive downlink signals, data, and information from the eNB.
  • the Tx module 22 may transmit UL signals, data, and information to the eNB.
  • the processor 23 may control overall operation of the UE apparatus 20 .
  • the processor 23 of the UE apparatus 20 can operate to perform the above-mentioned embodiments.
  • the processor 23 of the UE apparatus 20 processes information received at the UE apparatus 20 and transmission information to be externally transmitted.
  • the memory 24 may store the processed information for a predetermined time.
  • the memory 24 may be replaced with a component such as a buffer (not shown).
  • the specific configurations of the transmission point apparatus and the UE apparatus may be implemented such that the various embodiments of the present invention are independently performed or two or more embodiments of the present invention are simultaneously performed. Redundant matters will not be described herein for clarity.
  • the description of the transmission point apparatus 10 shown in FIG. 10 may be identically applied to a relay node acting as a DL transmission entity or UL reception entity and the description of the UE apparatus 20 may be identically applied to the relay node acting as a DL reception entity or a UL transmission entity.
  • the method according to the embodiments of the present invention may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, or microprocessors.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs Field Programmable Gate Arrays
  • processors controllers, microcontrollers, or microprocessors.
  • the method according to the embodiments of the present invention may be implemented in the form of modules, procedures, functions, etc. performing the above-described functions or operations.
  • Software code may be stored in a memory unit and executed by a processor.
  • the memory unit may be located at the interior or exterior of the processor and may transmit and receive data to and from the processor via various known means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
US14/779,307 2013-04-16 2014-04-16 Method and apparatus for reporting channel state information in wireless communication system Abandoned US20160056877A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/779,307 US20160056877A1 (en) 2013-04-16 2014-04-16 Method and apparatus for reporting channel state information in wireless communication system

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US201361812688P 2013-04-16 2013-04-16
US201361813163P 2013-04-17 2013-04-17
US201361815253P 2013-04-23 2013-04-23
US201361868054P 2013-08-20 2013-08-20
US201361875672P 2013-09-09 2013-09-09
US201361914948P 2013-12-11 2013-12-11
US201461925640P 2014-01-09 2014-01-09
PCT/KR2014/003315 WO2014171739A1 (fr) 2013-04-16 2014-04-16 Procédé et appareil permettant de signaler des informations d'état de canal dans un système de communication sans fil
US14/779,307 US20160056877A1 (en) 2013-04-16 2014-04-16 Method and apparatus for reporting channel state information in wireless communication system

Publications (1)

Publication Number Publication Date
US20160056877A1 true US20160056877A1 (en) 2016-02-25

Family

ID=51731599

Family Applications (2)

Application Number Title Priority Date Filing Date
US14/779,307 Abandoned US20160056877A1 (en) 2013-04-16 2014-04-16 Method and apparatus for reporting channel state information in wireless communication system
US14/782,561 Active US10122481B2 (en) 2013-04-16 2014-04-16 Method and apparatus for reporting channel state information in wireless communication system

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/782,561 Active US10122481B2 (en) 2013-04-16 2014-04-16 Method and apparatus for reporting channel state information in wireless communication system

Country Status (5)

Country Link
US (2) US20160056877A1 (fr)
KR (1) KR102229978B1 (fr)
CN (2) CN105122669B (fr)
GB (1) GB2527246A (fr)
WO (2) WO2014171742A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11683080B2 (en) 2017-11-24 2023-06-20 Lg Electronics Inc. Method for reporting channel state information in wireless communication system and apparatus for the same

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10085164B2 (en) * 2011-04-28 2018-09-25 Qualcomm Incorporated System and method for managing invalid reference subframes for channel state information feedback
EP3518449A1 (fr) * 2012-12-30 2019-07-31 LG Electronics Inc. Procédé de partage d'informations de ressource sans fil dans un système de communication sans fil à plusieurs cellules et appareil correspondant
EP2995113B1 (fr) * 2013-05-09 2020-12-02 Nokia Solutions and Networks Oy Mesures dans un système sans fil
US9860880B2 (en) * 2013-07-05 2018-01-02 Sharp Kabushiki Kaisha Terminal device, base station device, integrated circuit and communication method
WO2015020308A1 (fr) * 2013-08-08 2015-02-12 Samsung Electronics Co., Ltd. Procédé et appareil de renvoi de csi apériodiques dans un système de reconfiguration tdd flexible
WO2015024519A1 (fr) * 2013-08-21 2015-02-26 Telefonaktiebolaget L M Ericsson(Publ) Procédé et système pour configurer des mesures d'informations d'état de canal (csi)
EP3113537B1 (fr) * 2014-02-24 2021-03-31 Sharp Kabushiki Kaisha Dispositif de terminal, circuit intégré et procédé de radiocommunication
CN104935389B (zh) * 2014-03-21 2020-05-19 中兴通讯股份有限公司 信道状态信息测量方法和装置
CN111212477B (zh) * 2014-06-13 2023-10-10 北京三星通信技术研究有限公司 一种数据传输方法和设备
WO2016095110A1 (fr) * 2014-12-16 2016-06-23 富士通株式会社 Procédé et appareil d'estimation de canal de liaison descendante basés sur un signal de référence de sondage, et système de communication
WO2016121912A1 (fr) * 2015-01-29 2016-08-04 株式会社Ｎｔｔドコモ Terminal utilisateur, station de base sans fil, système de communication sans fil, et procédé de communication sans fil
SG11201710803PA (en) * 2015-07-08 2018-01-30 Sharp Kk Terminal device, base station device, communication method, and integrated circuit
CN106656280A (zh) * 2015-07-20 2017-05-10 电信科学技术研究院 一种信道状态信息的反馈及其控制方法和设备
US10602389B2 (en) 2015-08-13 2020-03-24 Lg Electronics Inc. Method for reporting channel state information of terminal in wireless communication system and device using the method
CN114221747B (zh) 2016-02-05 2024-08-13 三星电子株式会社 移动通信系统中的通信方法和设备
KR102288627B1 (ko) 2016-03-02 2021-08-11 삼성전자 주식회사 통신 시스템에서 단말의 상향링크 제어 정보 전송 방법 및 장치
CN107294643B (zh) * 2016-03-31 2021-07-02 中兴通讯股份有限公司 一种信道状态信息反馈和配置的方法和装置
US11063717B2 (en) 2016-08-08 2021-07-13 Lg Electronics Inc. Channel state information transmitting method and user equipment, and channel state information receiving method and base station
WO2018062910A1 (fr) * 2016-09-29 2018-04-05 엘지전자 주식회사 Procédé pour fournir une rétroaction de csi hybride pour transmission mimo en boucle ouverte dans un système de communication sans fil et appareil associé
WO2018143665A1 (fr) * 2017-02-03 2018-08-09 엘지전자(주) Procédé de mesure et de rapport d'informations d'état de canal dans un système de communications sans fil et dispositif associé
CN108933648B (zh) * 2017-05-27 2022-08-19 中兴通讯股份有限公司 信道状态信息的处理方法及装置、终端、基站
US11071128B2 (en) * 2017-11-10 2021-07-20 Qualcomm Incorporated Techniques for signaling a channel state information request and a communication link event
PL3711211T3 (pl) * 2017-11-17 2025-11-03 Telefonaktiebolaget Lm Ericsson (Publ) Nowa definicja zasobu referencyjnego csi dla raportu csi w nr
CN109302272B (zh) * 2018-02-13 2022-06-03 中兴通讯股份有限公司 Csi报告的发送、接收方法及装置、电子装置
CN110324124B (zh) * 2018-03-29 2022-04-12 维沃移动通信有限公司 非周期探测参考信号srs的传输方法及终端设备
US11770727B2 (en) * 2018-08-10 2023-09-26 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for channel state information reporting
US11228356B2 (en) * 2018-09-12 2022-01-18 Telefonaktiebolaget Lm Ericsson (Publ) Configuration of resources for downlink CSI measurements
KR102714569B1 (ko) * 2019-02-24 2024-10-07 엘지전자 주식회사 무선통신시스템에서 사이드 링크 단말이 채널 상태보고에 관련된 신호를 송수신하는 방법 및 장치
US11689267B2 (en) * 2019-05-03 2023-06-27 Mediatek Inc. Aperiodic CSI triggering in scenarios with multiple PDCCHs
US11356162B2 (en) 2019-05-24 2022-06-07 Mediatek Inc. CSI reporting for multiple transmission points
CN113170493B (zh) * 2019-07-03 2023-04-04 Oppo广东移动通信有限公司 传输方式确定方法及相关设备
JP7471412B2 (ja) * 2019-11-20 2024-04-19 エルジー エレクトロニクス インコーポレイティド Ｎｒ ｖ２ｘにおけるｃｓｉを要求する方法及び装置
US11877172B2 (en) * 2020-08-05 2024-01-16 Samsung Electronics Co., Ltd. Radio resource management and spectrum coordination
KR102581349B1 (ko) * 2020-11-06 2023-09-21 한국전자통신연구원 공장 자동화 시스템에서 프레임 운용 방법 및 장치
CN116803025A (zh) * 2021-01-15 2023-09-22 中兴通讯股份有限公司 用于信道状态信息测量和报告的方法、装置和系统
CN116827396A (zh) * 2022-03-22 2023-09-29 中兴通讯股份有限公司 信道状态信息的处理方法、终端、基站、介质

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110305161A1 (en) * 2010-06-15 2011-12-15 Anthony Edet Ekpenyong CSI Reporting on PUSCH for Carrier Aggregation
US20120076017A1 (en) * 2010-04-05 2012-03-29 Qualcomm Incorporated Aperiodic channel state information request in wireless communication
US20120176925A1 (en) * 2011-01-10 2012-07-12 Mediatek Inc. Method for determining an instance for performing a channel state information measurement and communications apparatuses utilizing the same
US20120201154A1 (en) * 2011-01-11 2012-08-09 Texas Instruments Incorporated CSI Measurement, Reporting and Collision-Handling
US20120257524A1 (en) * 2011-04-11 2012-10-11 Qualcomm Incorporated Csi reporting for multiple carriers with different system configurations
US20120300641A1 (en) * 2011-05-23 2012-11-29 Qualcomm Incorporated Channel state information feedback for carrier aggregation with flexible carrier configurations
US20130003788A1 (en) * 2011-01-07 2013-01-03 Interdigital Patent Holdings, Inc. Communicating channel state information (csi) of multiple transmission points
US20130030144A1 (en) * 2010-01-08 2013-01-31 Shaver Michael P Star polymers having controlled tacticity and methods of making same
US20130121174A1 (en) * 2011-11-14 2013-05-16 Renesas Mobile Corporation Methods and Apparatus for Managing Network Signaling
US20130301448A1 (en) * 2012-05-09 2013-11-14 Samsung Electronics Co., Ltd Csi definitions and feedback modes for coordinated multi-point transmission
US20130322376A1 (en) * 2012-06-04 2013-12-05 Interdigital Patent Holdings, Inc. Communicating channel state information (csi) of multiple transmission points
US20140010126A1 (en) * 2012-07-06 2014-01-09 Samsung Electronics Co., Ltd Method and apparatus for channel state information feedback reporting
US20140026946A1 (en) * 2011-12-13 2014-01-30 Zep Solar, Inc. Discrete Attachment Point Apparatus and System for Photovoltaic Arrays
US20140036664A1 (en) * 2012-08-03 2014-02-06 Seunghee Han PERIODIC CHANNEL STATE INFORMATION REPORTING FOR COORDINATED MULTIPOINT (CoMP) SYSTEMS
US20140086174A1 (en) * 2012-09-27 2014-03-27 Samsung Electronics Co., Ltd Method and apparatus for transmitting/receiving channel state information
US20140204869A1 (en) * 2013-01-22 2014-07-24 Innovative Sonic Corporation Method and apparatus for channel state information measurement in a wireless communication system
US20140269460A1 (en) * 2013-03-13 2014-09-18 Samsung Electronics Co., Ltd. Channel state information for adaptively configured tdd communication systems
US8868089B2 (en) * 2010-11-09 2014-10-21 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement in a telecommunication system
US20150146557A1 (en) * 2012-05-18 2015-05-28 China Academy Of Telecommunications Technology Method, system, and device for configuring channel measurement and dl csi feedback
US20150358139A1 (en) * 2013-01-18 2015-12-10 Zte Corporation Methods and Apparatuses for Measuring CSI
US20160100384A1 (en) * 2012-08-03 2016-04-07 Intel Corporation Reference signal configuration for coordinated multipoint

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100014091A (ko) * 2008-08-01 2010-02-10 엘지전자 주식회사 다중 반송파 시스템에서 데이터 전송 방법
EP2478646B1 (fr) * 2009-09-16 2017-08-16 LG Electronics Inc. Appareil et procédé de transmission d'informations de commande de liaison montante
KR20150028365A (ko) * 2010-01-08 2015-03-13 인터디지탈 패튼 홀딩스, 인크 다중 반송파의 채널 상태 정보 전송 방법
CN101908951B (zh) 2010-08-16 2016-05-11 中兴通讯股份有限公司 一种信道状态信息的报告方法及基站
CN101917259B (zh) * 2010-08-16 2016-06-15 中兴通讯股份有限公司 非周期信道状态信息报告的触发方法及基站
US9107211B2 (en) * 2010-11-17 2015-08-11 Lg Electronics Inc. Method and device for aperiodically reporting channel state information in wireless connection system
US8817647B2 (en) 2011-02-15 2014-08-26 Mediatek Inc. Priority rules of periodic CSI reporting in carrier aggregation
JP5462203B2 (ja) 2011-02-18 2014-04-02 株式会社Ｎｔｔドコモ 非周期的チャネル状態情報通知方法、無線基地局装置、ユーザ端末
KR20130018052A (ko) 2011-08-12 2013-02-20 주식회사 팬택 다중 요소 반송파 시스템에서 데이터 전송 방법 및 장치
CN102325013B (zh) 2011-07-19 2014-04-02 电信科学技术研究院 信道状态信息传输方法和设备
CN102271032B (zh) 2011-08-09 2014-11-19 电信科学技术研究院 一种实现上行反馈的方法、系统及装置
KR20200000473A (ko) * 2011-08-12 2020-01-02 인터디지탈 패튼 홀딩스, 인크 무선 네트워크들에서의 간섭 측정
CN102368697B (zh) 2011-09-30 2018-04-03 中兴通讯股份有限公司 干扰测量信令通知、干扰测量及反馈方法及其装置
RU2628011C2 (ru) * 2012-01-27 2017-08-14 Интердиджитал Пэйтент Холдингз, Инк. Способ для предоставления усовершенствованного физического канала управления нисходящей линии связи в системе беспроводной связи и беспроводной приемо-передающий модуль
CN102624490A (zh) * 2012-03-27 2012-08-01 华为技术有限公司 信息传输方法、装置、系统及用户设备

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130030144A1 (en) * 2010-01-08 2013-01-31 Shaver Michael P Star polymers having controlled tacticity and methods of making same
US20120076017A1 (en) * 2010-04-05 2012-03-29 Qualcomm Incorporated Aperiodic channel state information request in wireless communication
US20110305161A1 (en) * 2010-06-15 2011-12-15 Anthony Edet Ekpenyong CSI Reporting on PUSCH for Carrier Aggregation
US8868089B2 (en) * 2010-11-09 2014-10-21 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement in a telecommunication system
US20130003788A1 (en) * 2011-01-07 2013-01-03 Interdigital Patent Holdings, Inc. Communicating channel state information (csi) of multiple transmission points
US20120176925A1 (en) * 2011-01-10 2012-07-12 Mediatek Inc. Method for determining an instance for performing a channel state information measurement and communications apparatuses utilizing the same
US20120201154A1 (en) * 2011-01-11 2012-08-09 Texas Instruments Incorporated CSI Measurement, Reporting and Collision-Handling
US20120257524A1 (en) * 2011-04-11 2012-10-11 Qualcomm Incorporated Csi reporting for multiple carriers with different system configurations
US20120300641A1 (en) * 2011-05-23 2012-11-29 Qualcomm Incorporated Channel state information feedback for carrier aggregation with flexible carrier configurations
US20130121174A1 (en) * 2011-11-14 2013-05-16 Renesas Mobile Corporation Methods and Apparatus for Managing Network Signaling
US20140026946A1 (en) * 2011-12-13 2014-01-30 Zep Solar, Inc. Discrete Attachment Point Apparatus and System for Photovoltaic Arrays
US20130301448A1 (en) * 2012-05-09 2013-11-14 Samsung Electronics Co., Ltd Csi definitions and feedback modes for coordinated multi-point transmission
US20150146557A1 (en) * 2012-05-18 2015-05-28 China Academy Of Telecommunications Technology Method, system, and device for configuring channel measurement and dl csi feedback
US20130322376A1 (en) * 2012-06-04 2013-12-05 Interdigital Patent Holdings, Inc. Communicating channel state information (csi) of multiple transmission points
US20140010126A1 (en) * 2012-07-06 2014-01-09 Samsung Electronics Co., Ltd Method and apparatus for channel state information feedback reporting
US20140036664A1 (en) * 2012-08-03 2014-02-06 Seunghee Han PERIODIC CHANNEL STATE INFORMATION REPORTING FOR COORDINATED MULTIPOINT (CoMP) SYSTEMS
US20160100384A1 (en) * 2012-08-03 2016-04-07 Intel Corporation Reference signal configuration for coordinated multipoint
US20140086174A1 (en) * 2012-09-27 2014-03-27 Samsung Electronics Co., Ltd Method and apparatus for transmitting/receiving channel state information
US20150358139A1 (en) * 2013-01-18 2015-12-10 Zte Corporation Methods and Apparatuses for Measuring CSI
US20140204869A1 (en) * 2013-01-22 2014-07-24 Innovative Sonic Corporation Method and apparatus for channel state information measurement in a wireless communication system
US20140269460A1 (en) * 2013-03-13 2014-09-18 Samsung Electronics Co., Ltd. Channel state information for adaptively configured tdd communication systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11683080B2 (en) 2017-11-24 2023-06-20 Lg Electronics Inc. Method for reporting channel state information in wireless communication system and apparatus for the same

Also Published As

Publication number Publication date
CN105122669A (zh) 2015-12-02
WO2014171739A1 (fr) 2014-10-23
US10122481B2 (en) 2018-11-06
US20160050648A1 (en) 2016-02-18
GB201517834D0 (en) 2015-11-25
GB2527246A (en) 2015-12-16
KR102229978B1 (ko) 2021-03-19
CN105122680A (zh) 2015-12-02
CN105122680B (zh) 2019-01-29
CN105122669B (zh) 2019-06-18
WO2014171742A1 (fr) 2014-10-23
KR20160011182A (ko) 2016-01-29

Similar Documents

Publication Publication Date Title
US10122481B2 (en) Method and apparatus for reporting channel state information in wireless communication system
US11991540B2 (en) Method and apparatus for feeding back aggregated channel state information in cooperative multipoint communication system
US10277298B2 (en) Method and apparatus for transmitting channel state information in wireless communication system
US10218479B2 (en) Method and apparatus for transmitting channel state information-reference signals in wireless communication system
US9936405B2 (en) Method for performing measurement in wireless communications system and apparatus therefor
US9674724B2 (en) Method and apparatus for transmitting measurement report in a wireless communication system
US9572148B2 (en) Method and apparatus for transceiving a downlink control channel in a wireless communication system
US9554371B2 (en) Method and device for reporting channel state information in wireless communication system
US9451488B2 (en) Method and apparatus for channel state information feedback in wireless communication system
US9608699B2 (en) Method and device for transmitting channel state information in wireless communication system
US9184806B2 (en) Method for performing hierarchical beamforming in wireless access system and device therefor
EP2950462B1 (fr) Procédé et dispositif permettant de mesurer un canal entre des stations de base dans un système de communication sans fil
US9602183B2 (en) Method and apparatus for reporting channel state information in wireless communication system
US9516636B2 (en) Method and apparatus for transceiving a downlink control channel in a wireless communication system
US9853786B2 (en) Method and device for reporting channel state information in wireless communication system
GB2527255A (en) Method and apparatus for reporting channel state information in wireless communication system

Legal Events

Date Code Title Description
AS Assignment

Owner name: LG ELECTRONICS INC., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SEO, INKWON;LEE, SEUNGMIN;SEO, HANBYUL;REEL/FRAME:036626/0969

Effective date: 20150818

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: FINAL REJECTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE AFTER FINAL ACTION FORWARDED TO EXAMINER

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION