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WO2015003367A1 - Procédé de rétroaction d'informations d'état de canal (csi), équipement d'utilisateur et station de base - Google Patents

Procédé de rétroaction d'informations d'état de canal (csi), équipement d'utilisateur et station de base Download PDF

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Publication number
WO2015003367A1
WO2015003367A1 PCT/CN2013/079228 CN2013079228W WO2015003367A1 WO 2015003367 A1 WO2015003367 A1 WO 2015003367A1 CN 2013079228 W CN2013079228 W CN 2013079228W WO 2015003367 A1 WO2015003367 A1 WO 2015003367A1
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WO
WIPO (PCT)
Prior art keywords
csi
epdcch
prb pair
base station
resource granularity
Prior art date
Application number
PCT/CN2013/079228
Other languages
English (en)
Chinese (zh)
Inventor
高驰
刘建琴
刘鹍鹏
吴强
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380023342.9A priority Critical patent/CN105165083A/zh
Priority to PCT/CN2013/079228 priority patent/WO2015003367A1/fr
Publication of WO2015003367A1 publication Critical patent/WO2015003367A1/fr

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Classifications

    • 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
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting

Definitions

  • Embodiments of the present invention relate to the field of communications, and more particularly, to a method, a user equipment, and a base station for feeding back channel state information CSI. Background technique
  • LTE Long Term Evolution
  • LTE Long Term Evolution
  • the closed-loop spatial multiplexing uses a codebook-based precoding technique, that is, a pre-designed one.
  • a codebook containing all possible precoding matrices may be indicated by an index of the codebook, which is referred to as a Precoding Matrix Indicator ("PMI").
  • PMI Precoding Matrix Indicator
  • EPDCCH enhanced physical downlink control channel
  • DMRS Demodulation Reference Signals
  • the user equipment may estimate the downlink MIMO channel based on the downlink reference signal, and determine an optimal rank, precoding matrix, and channel quality information based on the channel estimation, and the user equipment may also respectively correspond to the downlink MIMO channel.
  • Rank indicator (Rank lndicator, abbreviation Feedback to the base station for "RT”, PMI, and CQI, the feedback of the RI, PMI, and CQI is collectively referred to as CSI feedback.
  • the specific feedback content of the UE depends on the transmission mode, for example, the PMI only needs feedback in the closed-loop transmission mode, and the UE is When the CQI is fed back, the feedback PMI may be required at the same time, which is recorded as CQI/PML.
  • the CSI feedback in the prior art is optimized for the Physical Downlink Shared Channel (PDSCH), and there is no optimization for the EPDCCH transmission.
  • the CSI feedback makes the EPDCCH transmission unable to reach a better state.
  • the UE farther from the base station may not be able to receive the control signaling sent by the base station, thereby affecting the cell coverage and system performance, and in addition, the channel state is better.
  • the EPDCCH with a poor channel state needs to occupy more time-frequency resources when transmitting the same signaling, thereby causing waste of system resources.
  • the embodiments of the present invention provide a method for feeding back CSI, a user equipment, and a base station, which can improve the channel state of the EPDCCH.
  • a method for feeding back CSI including: determining a CSI set, where the CSI set includes a first CSI and a second CSI, where a resource granularity of the first CSI is a physical resource occupied by an enhanced physical downlink control channel EPDCCH. a block PRB pair, and the resource sizes of the first CSI and the second CSI are different; the CSI set is sent to the base station.
  • the resource granularity of the second CSI is a system bandwidth, where the first CSI includes a CSI obtained based on a PRB pair occupied by the EPDCCH; or a resource granularity of the second CSI.
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes A PRB determines the CSI for a system subband outside the subband.
  • the first CSI is determined based on the first PRB pair occupied by the EPDCCH and is based on the first
  • the difference between the PRB and the CSI determined by the subband is the difference between the PRB and the CSI determined by the subband.
  • a method for feeding back CSI including: receiving a CSI set sent by a user equipment UE, where the CSI set includes a first CSI and a second CSI, and the resource granularity of the first CSI
  • the physical resource block PRB pair occupied by the enhanced physical downlink control channel EPDCCH, and the resource granularity of the first CSI and the second CSI are different; according to the CSI set, the channel state of the downlink channel between the base station and the UE is determined.
  • the resource granularity of the second CSI is a system bandwidth, where the first CSI includes a CSI obtained based on a PRB pair occupied by the EPDCCH; or a resource granularity of the second CSI.
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes A PRB determines the CSI for a system subband outside the subband.
  • the first CSI is determined by using a first PRB pair occupied by the EPDCCH and a subband based on the first PRB pair Determine the difference in CSI.
  • a user equipment including: a determining module, configured to determine a CSI set, where the CSI set includes a first CSI and a second CSI, where a resource granularity of the first CSI is an enhanced physical downlink control channel (EPDCCH) And the resource module of the first CSI and the second CSI are different in granularity; the sending module is configured to send the CSI set determined by the determining module to the base station.
  • a determining module configured to determine a CSI set, where the CSI set includes a first CSI and a second CSI, where a resource granularity of the first CSI is an enhanced physical downlink control channel (EPDCCH) And the resource module of the first CSI and the second CSI are different in granularity
  • the sending module is configured to send the CSI set determined by the determining module to the base station.
  • the resource granularity of the second CSI is a system bandwidth, where the first CSI includes a CSI obtained based on a PRB pair occupied by the EPDCCH; or a resource granularity of the second CSI.
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes A PRB determines the CSI for a system subband outside the subband.
  • the first CSI is determined based on the first PRB pair occupied by the EPDCCH, and is based on the first The difference in the CSI determined by the PRB for the subband.
  • a base station including: a receiving module, configured to receive a CSI set sent by a user equipment UE, where the CSI set includes a first CSI and a second CSI, where a resource granularity of the first CSI is an enhanced physical downlink
  • the control resource EPDCCH occupies a physical resource block PRB pair, and the first CSI and the second CSI have different resource granularities
  • the determining module is configured to determine, according to the CSI set received by the receiving module, a downlink between the base station and the UE The channel state of the channel.
  • the resource granularity of the second CSI is a system bandwidth, where the first CSI includes a CSI obtained based on a PRB pair occupied by the EPDCCH; or a resource granularity of the second CSI.
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes A PRB determines the CSI for a system subband outside the subband.
  • the first CSI is a CSI determined based on a first PRB pair occupied by the EPDCCH and a subband based on the first PRB pair Determine the difference in CSI.
  • the method for feeding back CSI, the user equipment, and the base station feeds back the CSI of the EPDCCH to the base station, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the EPDCCH.
  • the channel state enhances the coverage of the cell and saves the system's time-frequency resources, improving the overall performance of the system.
  • FIG. 1 is a schematic flowchart of a method for feeding back channel state information CSI according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for feeding back CSI according to another embodiment of the present invention.
  • FIG. 3 is a schematic block diagram of a user equipment UE according to an embodiment of the present invention.
  • 4 is a schematic block diagram of a base station according to an embodiment of the present invention.
  • FIG. 5 is a schematic block diagram of a user equipment UE according to another embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a base station according to another embodiment of the present invention. detailed description
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS Universal Mobile Telecommunication
  • a user equipment may be referred to as a terminal (Mobile), a mobile station (Mobile Station, referred to as "MS”), and a mobile terminal (Mobile Terminal).
  • the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile telephone (or "cellular" telephone).
  • RAN Radio Access Network
  • the user devices can also be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange voice and/or data with the wireless access network.
  • the base station may be a base station (Base Transceiver Station, abbreviated as "BTS”) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be in LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • the evolved base station evolved Node B, abbreviated as “eNB” or “e-NodeB” is not limited by the present invention.
  • the method 100 includes:
  • S110 Determine a CSI set, where the CSI set includes a first CSI and a second CSI, where a resource granularity of the first CSI is a physical resource block PRB pair occupied by an enhanced physical downlink control channel EPDCCH, and the first CSI and the second CSI has different resource granularities;
  • the user equipment feeds back the CSI of the EPDCCH to the base station, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH and enhancing the coverage of the cell.
  • the CSI set includes a first CSI and a second CSI, where a resource granularity of the first CSI is different from a resource granularity of the second CSI.
  • the first CSI is determined by performing measurement on the EPDCCH, and the resource granularity thereof is a PRB pair
  • the second CSI may be determined by performing measurement on the PDSCH and the resource granularity thereof may be subband or broadband
  • the CSI set may also include other resource granularity CSI, and the embodiment of the present invention is not limited thereto.
  • the first CSI may include at least one of the following: RI, PMI, and CQI
  • the second CSI may also include at least one of the following: RI, PMI, and CQI, but the embodiment of the present invention is not limited thereto.
  • the UE feeds back the CSI for the EPDCCH while feeding back the CSI for the PDSCH, which can save the signaling overhead caused by the CSI feedback and further improve the system performance.
  • the UE may periodically feed back the CSI to the base station, and may also trigger the CSI to the base station, for example, when the UE receives the indication information sent by the base station to indicate the feedback CSI of the UE. Feedback is made, but embodiments of the invention are not limited thereto.
  • the foregoing CSI may be a CSI obtained directly based on a PRB pair occupied by the EPDCCH, or may be a CSI obtained by processing a CSI directly obtained by a PRB pair occupied by the EPDCCH, for example, directly obtained based on the PRB pair.
  • the difference between the CSI and the second CSI but the embodiment of the present invention is not limited thereto.
  • the EPDCCH may occupy at least one EPDCCH resource set, and each EPDCCH resource set in the at least one EPDCCH resource set may include at least one PRB pair, and accordingly, the first CSI may include only one EPDCCH resource set based
  • the determined CSI of the PRB may also include CSIs respectively determined based on the PRB pairs of the two or more EPDCCH resource sets, that is, at least one EPDCCH resource set that the UE may occupy for the EPDCCH.
  • the first CSI may include CSI respectively determined according to all PRB pairs in the first EPDCCH resource set, for example, the An EPDCCH resource set includes N PRB pairs, where N is an integer greater than 0, the first CSI may include N CSI values, and each CSI value is determined based on one of the N PRB pairs, respectively.
  • the embodiment of the invention is not limited thereto.
  • the first CSI is used to feed back at least one EPDCCH resource set occupied by the EPDCCH, but the embodiment of the present invention is not limited thereto.
  • the resource granularity of the second CSI may be a system bandwidth
  • the first CSI may be directly obtained based on the PRB pair occupied by the EPDCCH, or may be a CSI directly obtained based on the PRB pair occupied by the EPDCCH.
  • the difference of the second CSI, the embodiment of the present invention is not limited thereto.
  • the resource granularity of the second CSI is a system bandwidth
  • the first CSI includes a CSI obtained based on a PRB pair occupied by the EPDCCH;
  • the resource granularity of the second CSI is a system bandwidth
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the UE may obtain the first CSI in multiple manners.
  • the first CSI may be a CSI obtained based on the PRB pair occupied by the EPDCCH and a sequence number of the CSI obtained based on the system broadband.
  • the difference may also be a difference between the CSI obtained by the PRB pair occupied by the EPDCCH and the absolute value of the CSI obtained based on the system wideband, for example, the absolute value of the CQI, but the embodiment of the present invention is not limited thereto.
  • the resource granularity of the second CSI may be a system subband, where the system subband may include k consecutive PRBs, where k is an integer greater than 0, and accordingly,
  • the resource granularity of the second CSI is a system subband.
  • the second CSI may include CSI obtained separately according to each subband of the system, or may only include CSI obtained based on a partial subband of the system, and the embodiment of the present invention is not limited thereto.
  • the first CSI may include a CSI directly obtained based on a PRB pair occupied by the EPDCCH, and may also include a CSI directly obtained based on the PRB pair occupied by the EPDCCH.
  • the difference of the second CSI, the embodiment of the present invention is not limited thereto.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH
  • the second CSI includes a CSI determined based on a system subband other than the subband in which the first PRB pair is located.
  • the first CSI includes the CSI obtained based on the first PRB pair
  • the second CSI does not include the CSI obtained based on the subband in which the first PRB pair is located, in other words, when the second CSI includes a system based
  • the first sub-band obtains the CSI
  • the first CSI does not include the CSI obtained based on the PRB included in the first sub-band, but the embodiment of the present invention is not limited thereto.
  • the first CSI is based on the first occupied by the EPDCCH.
  • the sub-band of the first PRB pair refers to a sub-band including the first PRB pair.
  • the embodiment of the present invention may obtain the second CSI in multiple manners.
  • the second CSI may be a CSI obtained by using the first PRB pair and the CSI obtained by the first PRB pair.
  • the difference may also be a difference between the CSI obtained by the first PRB pair and the absolute value of the CSI obtained by the subband in the first PRB pair, for example, the difference between the absolute values of the CQI, but the embodiment of the present invention is not limited thereto. this.
  • the user equipment feeds back the CSI of the EPDCCH to the base station, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH and enhancing the coverage of the cell.
  • the method for feeding back CSI according to an embodiment of the present invention is described in detail above with reference to FIG. 1. From the perspective of a base station, a method for feeding back CSI according to an embodiment of the present invention will be described in detail below.
  • FIG. 2 is a schematic flowchart of a method 200 for feeding back CSI according to another embodiment of the present invention.
  • the method may be performed by any suitable device, for example, by a network element such as a base station, a base station controller, or a network side server.
  • a network element such as a base station, a base station controller, or a network side server.
  • the following is a description of the method 200 performed by the base station, but the embodiment of the present invention is not limited thereto.
  • the method 200 includes:
  • the CSI set includes a first CSI and a second CSI, where the resource granularity of the first CSI is a physical resource block PRB pair occupied by the enhanced physical downlink control channel EPDCCH, and the first The resource granularity of the CSI and the second CSI are different;
  • the S220 Determine, according to the CSI set, a channel state of a downlink channel between the base station and the UE. Therefore, according to the method for feeding back CSI, the user equipment feeds back the CSI of the EPDCCH to the base station, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH and enhancing the coverage of the cell.
  • the resource granularity of the second CSI is a system bandwidth, where the first CSI includes a CSI obtained based on a PRB pair occupied by the EPDCCH; or
  • the resource granularity of the second CSI is a system bandwidth
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes determining a system subband based on a subband other than the first PRB pair. CSI.
  • the first CSI is a difference between a CSI determined based on a first PRB pair occupied by the EPDCCH and a CSI determined based on a subband in which the first PRB pair is located.
  • the user equipment feeds back the CSI of the EPDCCH to the base station, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH and enhancing the coverage of the cell.
  • FIG. 3 shows a schematic block diagram of a user equipment UE 300 according to an embodiment of the present invention, as shown in the figure.
  • the UE 300 includes:
  • the determining module 310 is configured to determine a CSI set, where the CSI set includes a first CSI and a second CSI, where the resource granularity of the first CSI is a physical resource block PRB pair occupied by the enhanced physical downlink control channel EPDCCH, and the first CSI Different from the resource granularity of the second CSI;
  • the sending module 320 is configured to send, to the base station, the CSI set determined by the determining module 310. Therefore, the user equipment according to the embodiment of the present invention feeds back the CSI of the EPDCCH to the base station by using the user equipment, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH, and enhancing the coverage of the cell. Save time and frequency resources of the system and improve the overall performance of the system.
  • the resource granularity of the second CSI is a system bandwidth
  • the first CSI includes
  • the resource granularity of the second CSI is a system bandwidth
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes determining a system subband based on a subband other than the first PRB pair. CSI.
  • the first CSI is a difference between a CSI determined based on a first PRB pair occupied by the EPDCCH and a CSI determined based on a subband in which the first PRB pair is located.
  • User equipment 300 may correspond to user equipment in a method of indicating a pilot state according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in user equipment 300 are respectively implemented in order to implement a map. The corresponding flow of each method in 1 will not be repeated here for brevity.
  • the user equipment according to the embodiment of the present invention feeds back to the base station through the user equipment.
  • the CSI of the EPDCCH enables the base station to optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH, enhancing the coverage of the cell, saving the system time-frequency resources, and improving the overall performance of the system.
  • FIG. 4 shows a schematic block diagram of a base station 400 according to an embodiment of the present invention.
  • the base station 400 includes:
  • the receiving module 410 is configured to receive a CSI set sent by the user equipment UE, where the CSI set includes a first CSI and a second CSI, where the resource granularity of the first CSI is a physical resource block PRB pair occupied by the enhanced physical downlink control channel EPDCCH, And the resource granularity of the first CSI and the second CSI are different;
  • the determining module 420 is configured to determine, according to the CSI set received by the receiving module 410, a channel state of a downlink channel between the base station and the UE.
  • the base station according to the embodiment of the present invention feeds back the CSI of the EPDCCH to the base station by using the user equipment, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH, enhancing the coverage of the cell, and saving The system's time-frequency resources enhance the overall performance of the system.
  • the resource granularity of the second CSI is a system bandwidth, where the first CSI includes a CSI obtained based on a PRB pair occupied by the EPDCCH; or
  • the resource granularity of the second CSI is a system bandwidth, and the first CSI is based on the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes determining a system subband based on a subband other than the first PRB pair. CSI.
  • the first CSI is a difference between a CSI determined based on a first PRB pair occupied by the EPDCCH and a CSI determined based on a subband in which the first PRB pair is located.
  • the base station 400 may correspond to a user equipment in a method for indicating a pilot state according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in the base station 400 are respectively implemented in FIG. The corresponding processes of the various methods are not repeated here for brevity.
  • the base station according to the embodiment of the present invention feeds back the CSI of the EPDCCH to the base station by using the user equipment, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH, enhancing the coverage of the cell, and saving The system's time-frequency resources enhance the overall performance of the system.
  • FIG. 5 shows a schematic block diagram of a user equipment UE 500 according to another embodiment of the present invention.
  • the UE 500 includes: a processor 510, a memory 520, a bus system 530, and a transmitter 540.
  • the processor 510, the memory 520 and the transmitter 540 are connected by a bus system 530 for storing instructions.
  • the processor 510 calls the instruction stored in the memory 520 through the bus system 530 for determining CSI.
  • the CSI set includes a first CSI and a second CSI, where the resource granularity of the first CSI is a physical resource block PRB pair occupied by the enhanced physical downlink control channel EPDCCH, and the resource granularity of the first CSI and the second CSI
  • the transmitter 540 is configured to send the CSI set determined by the processor 510 to the base station.
  • the user equipment according to the embodiment of the present invention feeds back the CSI of the EPDCCH to the base station by using the user equipment, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH, and enhancing the coverage of the cell. Save time and frequency resources of the system and improve the overall performance of the system.
  • the processor 510 may be a central processing unit (Central Processing Unit, abbreviated as "CPU"), and the processor 510 may also be other general-purpose processors, digital signal processors (DSPs).
  • DSPs digital signal processors
  • ASIC application specific integrated circuit
  • FPGA off-the-shelf programmable gate array
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 520 can include read only memory and random access memory and provides instructions and data to the processor 510. A portion of the memory 520 may also include a non-volatile random access memory. For example, the memory 520 can also store information of the device type.
  • the bus system 530 may include a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 530 in the figure.
  • the steps of the above method may be completed by an integrated logic circuit of hardware in the processor 510 or an instruction in the form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in random memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, etc., which are well established in the art.
  • the storage medium is located in the memory 520.
  • the processor 510 reads the information in the memory 520 and completes the steps of the above method in combination with the hardware. To avoid repetition, it will not be described in detail here.
  • the resource granularity of the second CSI is a system bandwidth
  • the first CSI includes
  • the resource granularity of the second CSI is a system bandwidth
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes determining a system subband based on a subband other than the first PRB pair. CSI.
  • the first CSI is based on the first occupied by the EPDCCH.
  • User equipment 500 may correspond to a user equipment in a method of indicating a pilot state according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in user equipment 500 are respectively implemented for The corresponding flow of each method in 1 will not be repeated here for brevity.
  • the user equipment according to the embodiment of the present invention feeds back the CSI of the EPDCCH to the base station by using the user equipment, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH, and enhancing the coverage of the cell.
  • Savings department The time-frequency resources of the system improve the overall performance of the system.
  • FIG. 6 shows a schematic block diagram of a base station 600 according to another embodiment of the present invention.
  • the base station 600 includes: a processor 610, a memory 620, a bus system 630, and a receiver 640.
  • the processor 610, the memory 620, and the receiver 640 are connected by a bus system 630.
  • the memory 620 is configured to store an instruction, and the processor 610 calls the instruction stored in the memory 620 through the bus system 630.
  • the receiver 640 is configured to receive a CSI set sent by the user equipment UE, where the CSI set includes a first CSI and a second CSI, where the resource granularity of the first CSI is a physical resource block PRB pair occupied by the enhanced physical downlink control channel EPDCCH, and The resource size of the first CSI and the second CSI are different; the processor 610 is configured to determine, according to the CSI set received by the receiver 640, a channel state of a downlink channel between the base station and the UE.
  • the base station according to the embodiment of the present invention feeds back the CSI of the EPDCCH to the base station by using the user equipment, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH, enhancing the coverage of the cell, and saving The system's time-frequency resources enhance the overall performance of the system.
  • the processor 610 may be a central processing unit (Central)
  • the processor 610 can also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable logic. Devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 620 can include read only memory and random access memory and provides instructions and data to the processor 610. A portion of memory 620 may also include non-volatile random access memory. For example, the memory 620 can also store information of the device type.
  • the bus system 630 may include a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 630 in the figure.
  • each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 610 or an instruction in a form of software.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 620, and the processor 610 reads the information in the memory 620 and combines the information.
  • the hardware completes the steps of the above method. To avoid repetition, it will not be described in detail here.
  • the resource granularity of the second CSI is a system bandwidth, where the first CSI includes a CSI obtained based on a PRB pair occupied by the EPDCCH; or
  • the resource granularity of the second CSI is a system bandwidth
  • the first CSI is a difference between the determined CSI and the second CSI based on the PRB pair occupied by the EPDCCH.
  • the resource granularity of the second CSI is a system subband.
  • the first CSI includes a CSI obtained based on a first PRB pair occupied by the EPDCCH, where the second CSI includes determining a system subband based on a subband other than the first PRB pair. CSI.
  • the first CSI is based on the first occupied by the EPDCCH.
  • the base station 600 may correspond to user equipment in a method for indicating a pilot state according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in the base station 600 are respectively implemented in FIG. The corresponding processes of the various methods are not repeated here for brevity.
  • the base station according to the embodiment of the present invention feeds back the CSI of the EPDCCH to the base station by using the user equipment, so that the base station can optimize the EPDCCH according to the CSI of the EPDCCH, thereby improving the channel state of the EPDCCH, enhancing the coverage of the cell, and saving The system's time-frequency resources enhance the overall performance of the system.
  • the term "and/or” is merely an association relationship describing an associated object, indicating that there may be three relationships.
  • a and / or B can mean: A exists separately, there are A and B, and there are three cases of B alone.
  • the character " /" in this article generally indicates that the contextual object is an "or" relationship.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention contributes in essence or to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a disk or a CD.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de rétroaction d'informations CSI (Channel State Information), un équipement d'utilisateur et une station de base. Le procédé consiste à déterminer un ensemble CSI, l'ensemble CSI comprenant des premières informations CSI et des secondes informations CSI, une granularité de ressources des premières informations CSI étant une paire de blocs de ressources physiques (PRB, Physical Resource Block) occupée par un canal de commande de liaison descendante physique amélioré (EPDCCH, Enhanced Physical Downlink Control Channel), et la granularité des ressources des premières informations CSI étant différente de celle des secondes informations CSI ; et à envoyer l'ensemble CSI à une station de base. Conformément au procédé de rétroaction d'informations CSI, à l'équipement d'utilisateur et à la station de base des modes de réalisation de la présente invention, l'équipement d'utilisateur fournit une rétroaction d'informations CSI concernant un EPDCCH à la station de base de manière à ce que la station de base puisse optimiser l'EPDCCH conformément aux informations CSI de l'EPDCCH, cela améliorant un état de canal de l'EPDCCH, améliorant la couverture de la cellule, économisant les ressources temps-fréquence d'un système, et améliorant les performances du système dans leur ensemble.
PCT/CN2013/079228 2013-07-11 2013-07-11 Procédé de rétroaction d'informations d'état de canal (csi), équipement d'utilisateur et station de base WO2015003367A1 (fr)

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CN201380023342.9A CN105165083A (zh) 2013-07-11 2013-07-11 反馈信道状态信息csi的方法、用户设备和基站
PCT/CN2013/079228 WO2015003367A1 (fr) 2013-07-11 2013-07-11 Procédé de rétroaction d'informations d'état de canal (csi), équipement d'utilisateur et station de base

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