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WO2015032057A1 - Procédé et dispositif pour rapporter des informations d'état de canal et déterminer un procédé de modulation et de codage - Google Patents

Procédé et dispositif pour rapporter des informations d'état de canal et déterminer un procédé de modulation et de codage Download PDF

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Publication number
WO2015032057A1
WO2015032057A1 PCT/CN2013/083018 CN2013083018W WO2015032057A1 WO 2015032057 A1 WO2015032057 A1 WO 2015032057A1 CN 2013083018 W CN2013083018 W CN 2013083018W WO 2015032057 A1 WO2015032057 A1 WO 2015032057A1
Authority
WO
WIPO (PCT)
Prior art keywords
state information
channel state
subframe
user equipment
network side
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.)
Ceased
Application number
PCT/CN2013/083018
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English (en)
Chinese (zh)
Inventor
张兴炜
李超君
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.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2013/083018 priority Critical patent/WO2015032057A1/fr
Priority to CN201380002373.6A priority patent/CN103748820B/zh
Publication of WO2015032057A1 publication Critical patent/WO2015032057A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for reporting channel state information and determining a modulation and coding scheme. Background technique
  • UE User Equipment
  • MCS Modulation and Coding Scheme
  • CSI Channel State Information
  • the CSI may include a CQI (Channel Quality Indicator), a PMI (Precoding Matrix Indicator), and a Precoding (Precoding). Type Indication, precoding type indication) and RI ( Rank Indicator).
  • the eNB determines the MCS used in the downlink (DL) subframe according to the received uplink (UL) feedback information, and implements Adaptive Modulation and Coding (AMC).
  • AMC Adaptive Modulation and Coding
  • Both LTE-A and LTE support FDD (Frequency Division Duplex) and TDD (Time Division Duplex).
  • TDD duplex mode of the LTE-A the transmit and receive signals are in the same frequency band, and the uplink and downlink radio frames are differentiated by being transmitted in different time periods on the time axis.
  • the one radio frame may include: a downlink subframe , uplink subframes, special subframes, and flexible subframes.
  • the flexible subframe is a new subframe type that is more LTE-A than LTE.
  • the flexible subframe can be configured as a downlink subframe or an uplink subframe dynamically or semi-statically.
  • the UE only reports the latest CSI obtained by the latest measurement at the reporting time point, and the base station determines the current subframe according to the CSI that is last measured by the reported UE, regardless of whether the subframe is a fixed subframe or a flexible subframe.
  • the MCS used by the scheduling regardless of whether the current subframe is a fixed subframe or a flexible subframe.
  • the embodiments of the present invention provide a method and a device for reporting channel state information and determining a modulation and coding mode, which are used to solve the technical problem of not being accurate when determining the MCS of a downlink subframe.
  • a first aspect of the present invention provides a method for reporting channel state information, including: determining, by a user equipment, at least one channel state information, where the at least one channel state information is channel state information of at least one subframe or at least one subframe set ;
  • the user equipment reports some or all of the determined channel state information of the at least one channel state information to the network side device.
  • the determining, by the user equipment, the at least one channel state information includes:
  • the first downlink subframe is a fixed subframe
  • the second downlink subframe is a flexible subframe
  • the first downlink subframe set is a fixed subframe set
  • the second downlink subframe set is a flexible subframe set.
  • the user equipment reporting the part or all of the channel state information in the determined at least one channel state information to the network side device includes: The user equipment reports the measured at least one channel state information on a downlink subframe that is the same subframe set as the specific subframe;
  • the specific subframe is a fixed subframe or a flexible subframe.
  • the specific subframe is a fixed subframe
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, and further includes: the at least one channel state information that is measured on the subframe.
  • the specific subframe is an uplink subframe that transmits the at least one channel state information, or an uplink subframe that transmits the at least one channel state information
  • N is a positive integer.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, including:
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, including:
  • the user equipment transmits part or all of the determined channel state information in the determined at least one channel state information by using the third transmission resource configured by the network side device.
  • the user equipment transmits, by using the third transmission resource configured by the network side device, part of the determined at least one channel state information or All channel status information, including:
  • the user equipment adopts a third format of control signaling, Format 3, through the network side device. And configuring, by the third transmission resource, part or all of the determined channel state information in the determined at least one channel state information.
  • the user equipment transmits the determined at least the third transmission resource configured by the network side device
  • the part or all of the channel state information in the channel state information includes: if the determined cost of the at least one channel state information is greater than the maximum number of transmission bits, the user equipment according to the priority of the channel state information, Channel state information that needs to be reported is selected in the at least one channel state information, where the selected channel state information that needs to be reported is not greater than the maximum number of transmission bits;
  • the user equipment transmits the selected channel state information that needs to be reported through the third transmission resource configured by the network side device.
  • the user equipment to the network side device, to report the part or all of the channel state information of the at least one channel state information, includes: the user equipment
  • the network side device reports channel state information measured on a fixed downlink subframe.
  • a second aspect of the present invention provides a method for determining a modulation and coding mode, including: receiving, by a network side device, at least one channel state information reported by a user equipment;
  • the network side device determines a modulation and coding manner of the downlink subframe according to the channel state information.
  • the network side device receives the at least one channel state information that is reported by the user equipment, including:
  • the network side device determines, according to the channel state information, a modulation and coding manner of the downlink subframe, including:
  • the network side device determines, according to the channel state information, a modulation and coding mode of the subsequent Nth downlink subframe, where N is a positive integer.
  • the network side device receives the at least one channel state information that is reported by the user equipment, and includes: The network side device receives multiple channel state information reported by the user equipment;
  • Determining, by the network side device, the modulation and coding mode of the downlink subframe according to the channel state information including:
  • the network side device determines a subframe set in which the subframe corresponding to the multiple channel state information is located, where the subframe corresponding to the channel state information is a subframe used when the user equipment measures channel state information;
  • the network side device determines the modulation and coding mode of the downlink subframe by using channel state information of the subframe set in which the Nth downlink subframe is located.
  • a third aspect of the present invention provides a user equipment, including:
  • a first determining module configured to determine at least one channel state information, where the at least one channel state information is channel state information of at least one subframe or at least one subframe set;
  • the reporting module is configured to report some or all of the determined channel state information in the determined at least one channel state information to the network side device.
  • the first determining module is specifically configured to: determine, measured on a first downlink subframe or a downlink subframe of a first downlink subframe set Channel state information, and determining channel state information measured on at least one second downlink subframe or a downlink subframe of at least one second downlink subframe set.
  • the first downlink subframe is a fixed subframe
  • the second downlink subframe is a flexible subframe
  • the first downlink subframe set is a fixed subframe set
  • the second downlink subframe set is a flexible subframe set.
  • the reporting module is specifically configured to: report the measured at least one channel state information on a downlink subframe that is the same subframe group as the specific subframe;
  • the specific subframe is a fixed subframe or a flexible subframe.
  • the specific subframe is a fixed subframe
  • the reporting module is further configured to: report the specific subframe to the network side device The obtained at least one channel state information is measured on a downlink subframe of a different subframe set.
  • the specific subframe is an uplink subframe that transmits the at least one channel state information, or an uplink subframe that transmits the at least one channel state information
  • N is a positive integer.
  • the reporting module is specifically configured to: transmit, by using the first transmission resource configured by the network side device, channel state information measured on a fixed downlink subframe, And transmitting, by the second transmission resource configured by the network side device, channel state information measured on the at least one flexible downlink subframe.
  • the reporting module is specifically configured to: transmit, by using a third transmission resource configured by the network side device, part of the determined at least one channel state information or All channel status information.
  • the reporting module is configured to transmit, by using the third transmission resource configured by the network side device, the determined at least one channel state information. Part or all of the channel state information, specifically: using a format 3 of the third control signaling, transmitting, by using the third transmission resource configured by the network side device, part of the determined at least one channel state information or All channel status information.
  • the reporting module is specifically configured to use the third transmission resource configured by the network side device to transmit the determined And the part or all of the channel state information of the at least one channel state information is specifically: if the determined cost of the at least one channel state information is greater than the maximum number of transmission bits, according to the priority of the channel state information, the determined The channel state information to be reported is selected from the at least one channel state information, wherein the selected channel state information to be reported is not greater than the maximum number of transmission bits; and the third transmission resource configured by the network side device is required to be reported. Channel status information.
  • the reporting module is specifically configured to: report, to the network side device, channel state information measured on a fixed downlink subframe.
  • a fourth aspect of the present invention provides a network side device, including: The receiving module is configured to receive at least one channel state information reported by the user equipment, where the second determining module is configured to determine, according to the channel state information, a modulation and coding mode of the downlink subframe.
  • the receiving module is specifically configured to: receive a channel state information reported by the user equipment;
  • the second determining module is specifically configured to: determine, according to the channel state information, a modulation and coding mode of the subsequent downlink subframes, where ⁇ is a positive integer.
  • the receiving module is specifically configured to: receive multiple channel state information reported by the user equipment;
  • the second determining module is specifically configured to: determine a subframe set in which the subframe corresponding to the multiple channel state information is located, where the subframe corresponding to the channel state information is a subframe used when the user equipment measures the channel state information; And determining, by using the channel state information of the subframe set in which the second downlink subframe is located, the modulation and coding mode of the downlink subframe.
  • a fifth aspect of the present invention provides a user equipment, including:
  • a first processor configured to determine at least one channel state information, where the at least one channel state information is channel state information of at least one subframe or at least one subframe set;
  • a sending interface configured to report, to the network side device, some or all of the determined channel state information in the at least one channel state information.
  • the first processor is specifically configured to: determine, measured on a first downlink subframe or a downlink subframe of a first downlink subframe set Channel state information, and determining channel state information measured on at least one second downlink subframe or a downlink subframe of at least one second downlink subframe set.
  • the first downlink subframe is a fixed subframe
  • the second downlink subframe is a flexible subframe
  • the first downlink subframe set is a fixed subframe set
  • the second downlink subframe set is a flexible subframe set.
  • the sending interface is specifically configured to: report the at least one channel that is measured on a downlink subframe that is the same subframe group as the specific subframe status information;
  • the specific subframe is a fixed subframe or a flexible subframe.
  • the specific subframe is a fixed subframe
  • the sending interface is further configured to: report to the network side device that the specific subframe is not The obtained at least one channel state information is measured on a downlink subframe of the same subframe set.
  • the specific subframe is an uplink subframe that transmits the at least one channel state information, or an uplink subframe that transmits the at least one channel state information
  • N is a positive integer.
  • the sending interface is specifically configured to: transmit, by using the first transmission resource configured by the network side device, channel state information measured on a fixed downlink subframe, And transmitting, by the second transmission resource configured by the network side device, channel state information measured on the at least one flexible downlink subframe.
  • the sending interface is specifically configured to: transmit, by using a third transmission resource configured by the network side device, part of the determined at least one channel state information or All channel status information.
  • the sending interface is configured to transmit, by using the third transmission resource configured by the network side device, the determined at least one channel state information. Part or all of the channel state information, specifically: using a format 3 of the third control signaling, transmitting, by using the third transmission resource configured by the network side device, part of the determined at least one channel state information or All channel status information.
  • the sending interface is specifically configured to use the third transmission resource configured by the network side device to transmit the determined And the part or all of the channel state information of the at least one channel state information is specifically: if the determined cost of the at least one channel state information is greater than the maximum number of transmission bits, according to the priority of the channel state information, the determined The channel state information to be reported is selected in the at least one channel state information, wherein the selected channel state information to be reported is not greater than the maximum number of transmission bits; and the third transmission resource configured by the network side device is used for transmission selection Channel status information to be reported.
  • the sending interface is specifically configured to: report, to the network side device, channel state information measured on a fixed downlink subframe.
  • a sixth aspect of the present invention provides a network side device, including:
  • An acquiring interface configured to receive at least one channel state information reported by the user equipment
  • the second processor is configured to determine, according to the channel state information, a modulation and coding manner of the downlink subframe.
  • the acquiring interface is specifically configured to: receive a channel state information reported by the user equipment;
  • the second processor is specifically configured to: determine, according to the channel state information, a modulation and coding mode of the Nth downlink subframe, where N is a positive integer.
  • the acquiring interface is specifically configured to: receive multiple channel state information reported by the user equipment;
  • the second processor is specifically configured to: determine a subframe set in which the subframe corresponding to the multiple channel state information is located, where the subframe corresponding to the channel state information is a subframe used when the user equipment measures channel state information; For the Nth downlink subframe, the channel state information of the subframe set in which the Nth downlink subframe is located is used to determine a modulation and coding mode of the downlink subframe.
  • the method for reporting channel state information in the embodiment of the present invention may include: determining, by the user equipment, at least one channel state information, where the at least one channel state information is channel state information of at least one subframe or at least one subframe set; The device reports some or all of the determined channel state information in the determined at least one channel state information to the network side device.
  • the user equipment may determine the at least one channel state information, so that part or all of the channel state information in the at least one channel state information may be reported to the network side device. For example, the user equipment may determine the at least one channel state information according to the requirement of the network side device, or the user equipment may report the multiple channel state information to the network side device, The network side device selects one of the channel state information for application. In this way, if the network side device needs to obtain the CSI obtained by the flexible subframe measurement, the user equipment may use the latest CSI measured by the latest flexible subframe.
  • the user equipment may report the latest CSI obtained by the last fixed subframe measurement, thereby avoiding the possibility in the prior art. The error occurs, try to ensure that the determined MCS is more accurate and improve the transmission efficiency.
  • FIG. 1 is a main flowchart of a method for reporting channel state information according to an embodiment of the present invention
  • FIG. 2A is a schematic diagram of a broadband reporting mode according to an embodiment of the present invention
  • 2B is a schematic diagram of a frequency selection reporting mode according to an embodiment of the present invention.
  • FIG. 3 is a main flowchart of a method for determining a modulation and coding mode according to an embodiment of the present invention
  • FIG. 4 is a structural diagram of a user equipment according to an embodiment of the present invention
  • FIG. 5 is a structural diagram of a network side device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a network side device according to an embodiment of the present invention. detailed description
  • the method for reporting channel state information in the embodiment of the present invention may include: determining, by the user equipment, at least one channel state information, where the at least one channel state information is channel state information of at least one subframe or at least one subframe set; The device reports some or all of the determined channel state information in the determined at least one channel state information to the network side device.
  • the user equipment may determine the at least one channel state information, so that part or all of the channel state information in the at least one channel state information may be reported to the network side device. For example, the user equipment may determine the at least one channel state information according to the requirement of the network side device, or the user equipment may report the multiple channel state information to the network side device, The network side device selects one of the channel state information for application. In this way, if the network side device needs to obtain the CSI obtained by the flexible subframe measurement, the user equipment may report the latest CSI obtained by the latest flexible subframe measurement, if the network side device needs to be fixed. Sub-frame measured CSI, said The user equipment can report the latest CSI measured by the fixed subframe, which avoids the error that may occur in the prior art, and ensures that the determined MCS is more accurate and improves the transmission efficiency.
  • GSM Global System for Mobile Communications
  • CDMA Code Division Multiple Access
  • CDMA Code Division Multiple
  • TDMA Time Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency OFDMA (Orthogonal Frequency-Division Multiple Access) system
  • SC-FDMA single carrier FDMA
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • the user equipment which may be a wireless terminal or a wired terminal, may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal
  • RAN Radio Access Network
  • the computers for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • a wireless terminal may also be called a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, an Access Point, Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, or User Equipment
  • the network side device may be, for example, a base station, or may be a relay device, or may be another network side device.
  • a base station e.g., an access point
  • the base station can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), this application is not limited.
  • BTS Base Transceiver Station
  • NodeB base station
  • NodeB evolved base station in LTE
  • LTE NodeB or eNB or e-NodeB, evolutional Node B
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association that describes the associated object, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists separately, and both A and B exist, exist alone B these three situations.
  • the character "/" in this article generally means that the contextual object is an "or" relationship.
  • FIG. 1 a flow chart of a method for reporting channel state information according to an embodiment of the present invention is described below.
  • Step 101 The user equipment determines at least one channel state information, where the at least one channel state information is channel state information of at least one subframe or at least one subframe set.
  • the reporting of the channel state information may include two types of non-periodic reporting and periodic reporting.
  • the aperiodic reporting may be performed by a network-side device, such as a base station, using a PUSCH (Physical Uplink Shared Channel) resource reporting, and the periodic reporting is mainly performed.
  • PUSCH Physical Uplink Shared Channel
  • the periodic reporting is mainly performed.
  • PUCCH Physical Uplink Control Channel
  • triggered acyclic reporting is a supplement to periodic reporting.
  • the periodic reporting on PUCCH can be mainly divided into two types: wideband reporting mode (Model-0/l-1) and frequency selective reporting mode (Mode2-0 /2-l).
  • the wideband reporting mode only feeds back the broadband channel state information
  • the frequency selective reporting mode has both feedback of the broadband channel state information and feedback of the subband channel state information.
  • Fig. 2A and Fig. 2B shows a wideband reporting mode
  • Fig. 2B shows a frequency selective reporting mode.
  • WB in Figs. 2A and 2B indicates a wide band
  • SB in Fig. 2B indicates a sub-band
  • Np in Fig. 2A indicates a reporting period.
  • the aperiodic reporting may also be referred to as triggering reporting.
  • the triggered reporting mainly sends a UL grant (uplink scheduling signaling) to the user equipment (UE) through the network side device, channel), which may include a "CSI request”.
  • Field (channel status information request field) field when the field is valid, triggers the UE to report channel status information.
  • the PDCCH channel can be divided into two search spaces, namely a common search space (CSS) and a UE-specific search space (USS).
  • the CSS is used to send common control information of all UEs
  • the USS is used to send control information of a specific UE.
  • TDD Time Division Duplex
  • a 10 ms radio frame is divided into two half frames of length 5 ms, and each half frame is composed of 5 subframes of length lms, including 4 normal subframes and 1 special subframe.
  • a normal subframe consists of two 0.5ms
  • a special subframe consists of three special time slots, which are UpPTS (Uplink Pilot TimeSlot) and GP (Guard Period).
  • UpPTS Uplink Pilot TimeSlot
  • GP Guard Period
  • DwPTS Downlink Pilot TimeSlot
  • DwPTS Downlink Pilot TimeSlot
  • time resources are allocated in the uplink and downlink directions.
  • the TDD frame structure currently supports 7 different uplink and downlink time proportional allocations (ie, configurations 0 to 6). It can be configured according to the characteristics of the traffic. These seven configurations include four 5ms cycles and three 10ms cycles. In the 5ms periodic configuration, the downlink to uplink transition interval is included every 5ms, and in the 10ms periodic configuration, the downlink to uplink transition interval is included every 10ms.
  • Table 1 where "D" indicates In the downlink subframe, "U” is represented as an uplink subframe, and "S” is represented as a special subframe including a transition interval.
  • LTE is discussing the problem of TDD uplink and downlink flexible subframe configuration.
  • the method of this configuration is that the UE can use the different TDD ratios listed above in a shorter period.
  • the UE adopts the uplink-downlink ratio of 0, and in the next 400ms, it can adopt the uplink-downlink ratio of 1.
  • the system can adopt a configuration of multiple uplink subframes, such as a ratio of 0.
  • the configuration of the downlink subframe can be configured.
  • the UE can be configured in the uplink and downlink.
  • the flexible subframe can be subframes 3, 4, 8, 9.
  • the interference between the UE in the fixed uplink subframe and the interference of the UE in the flexible upper and lower subframes are large.
  • the user equipment determines the at least one channel state information, which may be: the user equipment determines to be in the first downlink subframe or the downlink of the first downlink subframe set.
  • the channel state information measured on the subframe and the channel state information measured on the at least one second downlink subframe or the downlink subframe of the second downlink subframe set.
  • the first downlink subframe is a fixed subframe
  • the first downlink subframe set is a subframe set of a fixed subframe, which may be referred to as a fixed subframe set
  • the second downlink subframe is Flexible subframe
  • said The second downlink subframe set is a subframe set composed of flexible subframes, and may be referred to as a flexible subframe set. That is, in the embodiment of the present invention, the UE may only determine one channel state information measured on a fixed subframe, and determine a channel state information measured on the flexible subframe.
  • the UE can determine 2 channel state information.
  • a channel state information is channel state information measured on a fixed subframe, and the fixed subframe may be, for example, a #0 number, a #5 number, a #1 number, or a #6 subframe shown in Table 1, a channel state.
  • the information is channel state information measured on the flexible subframe, and the flexible subframe may be, for example, #3, #4, #7 (to be determined), #8 or #9 subframe shown in Table 1.
  • the flexible subframe may be divided into multiple flexible subframe sets due to different interferences.
  • the UE may determine one channel according to each flexible subframe set.
  • Status information that is, determining a plurality of channel state information measured on a flexible subframe, the plurality of flexible subframes respectively belonging to different flexible subframe sets.
  • the user equipment can simultaneously determine the channel state information measured on the fixed subframe and the channel state information measured on the flexible subframe, and the user equipment can report the channel state information to the network side device.
  • the network side device may select the channel state information that is required by the network side device to apply, and the modulation and coding mode determined according to the channel state information may be more accurate, or the user equipment may directly use the channel required by the network side device.
  • the status information is reported, which not only saves the overhead required for reporting, but also meets the requirements of the network side device, and can make the modulation and coding method determined according to the channel state information more accurate.
  • Step 102 The user equipment reports some or all of the determined channel state information in the determined at least one channel state information to the network side device.
  • the user equipment may report partial channel state information or all channel state information to the network side device.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment determines the determined All channel status information is reported.
  • the user equipment may determine a channel state measured on a fixed subframe.
  • the information, and the plurality of channel state information measured on the flexible subframe the user equipment may report the channel state information.
  • Format 2/2a/2b/3 format 2 of control signaling/format 2a of control signaling/format 2b of control signaling/format 3 of control signaling
  • each control signaling format has a maximum information bit limit that can be transmitted.
  • Format 2 can transmit up to 11 bits
  • Format 2a can transmit up to 12 bits (including 1 bit of A/N (positive acknowledgement/negative acknowledgement), and only 11 bits for channel state information).
  • Format 2b The maximum transmission capacity is 13 bits (in which 2 bits of A/N are required, and the space for transmitting channel state information is only 11 bits), Format 3 can transmit a maximum of 11 bits under FDD, and can transmit a maximum of 21 bits under TDD. It can be seen that for a format of control signaling, the transmission requirements in the embodiments of the present invention are not necessarily met.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network side.
  • the first transmission resource configured by the device, the channel state information measured on the fixed downlink subframe, and the second transmission resource configured by the network side device, and the transmission is measured on the at least one flexible downlink subframe Channel status information.
  • the user equipment may transmit channel state information measured on a fixed downlink subframe through Format 2a, and may transmit channel state information measured on the at least one flexible downlink subframe through Format 2b.
  • channel state information is transmitted by using different resources, which can meet the requirement of transmitting multiple channel state information.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network side.
  • the third transmission resource configured by the device transmits part or all of the determined channel state information of the at least one channel state information.
  • the user setting The Part 3 may transmit the determined part or all of the channel state information of the at least one channel state information by using the third transmission resource configured by the network side device. Because Format 3 can transmit a large number of bits in TDD mode, it generally meets the transmission requirements.
  • the user equipment may first determine an overhead required to transmit the at least one channel state information, and determine whether the overhead is greater than a maximum number of transmission bits that the third transmission resource can transmit, if the overhead is greater than the third transmission resource can transmit. a maximum number of transmission bits, the user equipment may select channel state information to be reported from the determined at least one channel state information according to a priority of each channel state information in the at least one channel state, where the selected need to report The overhead of the channel state information is not greater than the maximum number of transmission bits. Specifically, the user equipment may select channel state information with high priority to report according to the priority of each channel state from high to low. After the selection, the user equipment may transmit the selected channel state information that needs to be reported through the third transmission resource configured by the network side device.
  • the user equipment is likely to select only part of the channel state information of the at least one channel state information for reporting, for example, a total of four channel state information, which are XI, X2, X3, and X4, respectively, according to priority. Sort from high to low, in order: X3>X4>X1>X2.
  • the user equipment determines that the total cost required for X3, X4, XI, and X2 is greater than the maximum number of transmission bits, and determines that the overhead of X3, X4, and XI is not greater than the maximum number of transmission bits, so the user equipment may Select X3, X4 and XI to report it. For X2, the user equipment can discard it to save storage resources.
  • reporting methods that can be selected during periodic reporting. These methods can also be used for aperiodic reporting. However, since the reporting is performed on the PUSCH, the required transmission overhead can be basically satisfied.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment reports the specific and specific The sub-frames are on the downlink subframe of the same subframe set, and the measured at least A channel state information, where a specific subframe is a fixed subframe or a flexible subframe.
  • the user equipment may report the channel state information measured on the downlink subframe of the same subframe set as the current uplink subframe to the network side device.
  • the current uplink subframe refers to an uplink subframe used for transmitting the at least one channel state information.
  • the user equipment may report the channel state information measured on the fixed subframe to the network side device, if the current uplink subframe is a flexible subframe.
  • the user equipment may report the channel state information measured on the flexible subframe to the network side device.
  • the user equipment may directly report the channel state information measured on the fixed subframe to the network side device. In this way, only one channel state information is transmitted, which greatly saves the reporting overhead, and can also meet the requirements of the network side device.
  • the flexible subframe may be caused by the user equipment not receiving or not correctly receiving the configuration signaling sent by the network side device, thereby causing up/down confusion.
  • the reliability of reporting the status information of flexible sub-frames is sometimes not guaranteed, and the fixed sub-frames do not appear to be confusing in the uplink and downlink.
  • the reporting of channel status information is relatively stable. For this reason, if the current uplink subframe is a fixed subframe, the user equipment can not only report the channel state information measured on the fixed subframe to the network side device, but also report the above in the flexible subframe.
  • the channel state information measured on the frame that is, if the specific subframe is a fixed subframe
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device,
  • the user equipment may report, to the network side device, the measured at least one channel state information on a downlink subframe that is different from the specific subframe.
  • the user equipment may Reporting, to the network side device, channel state information measured on a flexible subframe, or because flexible subframes may be divided into multiples due to different interferences
  • the flexible subframe set the user equipment may report multiple channel state information to the network side device, where each channel state information corresponds to one flexible subframe set.
  • the user equipment may report the channel state information measured on the flexible subframe to the network side device, or because the flexible device
  • the frame may be divided into multiple flexible subframe sets due to different interference, and the user equipment may have multiple channel state information, where each channel state information corresponds to one flexible subframe set.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment determines the All channel status information is reported.
  • the user equipment may determine the channel state information measured on a fixed subframe, and the channel state information measured on the flexible subframe, and the user equipment may report the channel state information. .
  • Format 2/2a/2b/3 format 2 of control signaling/format 2a of control signaling/format 2b of control signaling/format 3 of control signaling
  • each control signaling format has a maximum information bit limit that can be transmitted.
  • Format 2 can transmit up to 11 bits
  • Format 2a can transmit up to 12 bits (including 1 bit of A/N (positive acknowledgement/negative acknowledgement), and only 11 bits for channel state information).
  • Format 2b The maximum transmission capacity is 13 bits (in which 2 bits of A/N are required, and the space for transmitting channel state information is only 11 bits), Format 3 can transmit a maximum of 11 bits under FDD, and can transmit a maximum of 21 bits under TDD. It can be seen that for a format of control signaling, the transmission requirements in the embodiments of the present invention are not necessarily met.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network side.
  • the first transmission resource configured by the device, and the transmission is measured on a fixed downlink subframe.
  • the user equipment may transmit channel state information measured on a fixed downlink subframe through Format 2a, and may transmit channel state information measured on the at least one flexible downlink subframe through Format 2b.
  • channel state information is transmitted by using different resources, which can meet the requirement of transmitting multiple channel state information.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network side.
  • the third transmission resource configured by the device transmits part or all of the determined channel state information of the at least one channel state information.
  • the user equipment may use Format 3 to transmit the determined at least one channel state information by using the third transmission resource configured by the network side device. Part or all of the channel status information. Because Format 3 can transmit a large number of bits in TDD mode, it generally meets the transmission requirements.
  • the user equipment may first determine an overhead required to transmit the at least one channel state information, and determine whether the overhead is greater than a maximum number of transmission bits that the third transmission resource can transmit, if the overhead is greater than the third transmission resource can transmit. a maximum number of transmission bits, the user equipment may select channel state information to be reported from the determined at least one channel state information according to a priority of each channel state information in the at least one channel state, where the selected need to report The overhead of the channel state information is not greater than the maximum number of transmission bits. Specifically, the user equipment may select channel state information with high priority to report according to the priority of each channel state from high to low. After the selection, the user equipment may transmit the selected channel state information that needs to be reported through the third transmission resource configured by the network side device.
  • the user equipment is likely to select only part of the channel state information in the at least one channel state information for reporting, for example, a total of four channel state information, which are XI, X2, respectively.
  • the user equipment determines that the total cost required for X3, X4, XI, and X2 is greater than the maximum number of transmission bits, and determines that the overhead of X3, X4, and XI is not greater than the maximum number of transmission bits, so the user equipment may Select X3, X4 and XI to report it. For X2, the user equipment can discard it to save storage resources.
  • reporting methods that can be selected during periodic reporting. These methods can also be used for aperiodic reporting. However, since the reporting is performed on the PUSCH, the required transmission overhead can be basically satisfied.
  • the user equipment may report, to the network side device, channel state information measured on a downlink subframe of the same subframe set as the next N downlink subframes, where N is a positive integer.
  • the N may be 1, that is, the user equipment may report the channel state information measured on the downlink subframe of the same subframe set as the next downlink subframe to the network side device.
  • the lower N is: the Nth downlink subframe after transmitting the at least one channel state information, for example, the next downlink subframe is the first downlink after transmitting the at least one channel state information frame.
  • the user equipment reports to the network side device that the same as the next N downlink subframes, because the channel state information reported by the UE is used to perform the next downlink scheduling for the network side device, and the MCS is selected for reference.
  • the channel state information measured on the downlink subframe of the frame set is obviously effective, and can be directly used by the network side device.
  • the user equipment may directly report the channel state information measured on the fixed subframe to the network side device. In this way, only one channel state information is transmitted, which greatly saves the reporting overhead, and can also meet the requirements of the network side device.
  • the user equipment may report the channel state information measured on the flexible subframe to the network side device, or
  • the frame may be divided into multiple flexible subframe sets due to different interference, and the user equipment may have multiple channel state information, where each channel state information corresponds to one flexible subframe.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network side.
  • the third transmission resource configured by the device transmits part or all of the determined channel state information of the at least one channel state information.
  • the user equipment may use Format 3 to transmit the determined at least one channel state information by using the third transmission resource configured by the network side device. Part or all of the channel status information. Because Format 3 can transmit a large number of bits in TDD mode, it generally meets the transmission requirements.
  • the user equipment may first determine an overhead required to transmit the at least one channel state information, and determine whether the overhead is greater than a maximum number of transmission bits that the third transmission resource can transmit, if the overhead is greater than the third transmission resource can transmit. a maximum number of transmission bits, the user equipment may select channel state information to be reported from the determined at least one channel state information according to a priority of each channel state information in the at least one channel state, where the selected need to report The overhead of the channel state information is not greater than the maximum number of transmission bits. Specifically, the user equipment may select channel state information with high priority to report according to the priority of each channel state from high to low. After the selection, the user equipment may transmit the selected channel state information that needs to be reported through the third transmission resource configured by the network side device.
  • the user equipment is likely to select only part of the channel state information of the at least one channel state information for reporting, for example, a total of four channel state information, which are XI, X2, X3, and X4, respectively, according to priority. Sort from high to low, in order: X3>X4>X1>X2.
  • the user equipment determines that the total cost required for X3, X4, XI, and X2 is greater than the maximum number of transmission bits, and determines that the overhead of X3, X4, and XI is not greater than the maximum number of transmission bits, so the user equipment may Select X3, X4 and XI to report it. For X2, the user equipment can discard it to save storage resources.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment is to the network side device.
  • the channel state information measured on the fixed downlink subframe is reported.
  • the user equipment may only report the channel state information measured on the fixed downlink subframe to the network side device.
  • the network side device can store the difference. Then, when the network side device obtains the channel state information measured on the fixed downlink subframe, if the required channel state information is the channel state information measured on the fixed downlink subframe, the network side device may Directly used, if the required channel state information is channel state information measured on the flexible downlink subframe, the network side device may obtain the flexible downlink according to the received channel state information and the known difference value. The channel state information measured on the frame can be applied.
  • Embodiment 1 the method in Embodiment 1 can be applied to the user equipment, and the next embodiment is introduced below.
  • an embodiment of the present invention provides a method for determining a modulation and coding mode, which is specifically described below.
  • the method in the second embodiment can be applied to the network side device.
  • Step 301 The network side device receives at least one channel state information reported by the user equipment.
  • the user equipment may report the at least one channel state information to the network side device, where the network side device may receive.
  • the user equipment may report only one channel state information, or may report more Channel status information.
  • the channel state information may be channel state information measured on a fixed subframe, or may be channel state information measured on a flexible subframe.
  • the channel state information may include only channel state information measured on multiple flexible subframes, or may be included in the flexible subframe.
  • the channel state information also includes channel state information measured on a fixed subframe.
  • Step 302 The network side device determines, according to channel state information, a modulation and coding mode of the downlink subframe.
  • the network side device may determine, according to the channel state information, a subsequent Nth downlink subframe. Modulation coding method.
  • the network side device may separately determine a subframe set in which the subframe corresponding to the multiple channel state information is located, That is, it is determined that each channel state information corresponds to a fixed subframe or a flexible subframe, respectively, wherein a subframe corresponding to one channel state information may be a subframe used when the user equipment measures the channel state information.
  • the network side device may use the subframe corresponding to the Nth downlink subframe for the Nth downlink subframe.
  • the channel state information of the set determines the modulation and coding mode of the downlink subframe.
  • the network side device may determine channel modulation information of the Nth downlink subframe by using channel state information measured on the fixed subframe.
  • the mode if the Nth downlink subframe is a flexible subframe, the network side device may use the channel state information measured on the flexible subframe to determine a modulation and coding manner of the Nth downlink subframe.
  • Embodiment 3 The embodiment of the present invention describes a process in which the network side device interacts with the user equipment.
  • the network side device may be a base station.
  • the user equipment determines at least one channel state information, and the at least one channel state information is channel state information of at least one subframe or at least one subframe set.
  • the determining, by the user equipment, the at least one channel state information the user equipment determining, in the first downlink subframe or the downlink of the first downlink subframe set The channel state information measured on the subframe, and the channel state information measured on the at least one second downlink subframe or the downlink subframe of the second downlink subframe set.
  • the first downlink subframe is a fixed subframe
  • the first downlink subframe set is a subframe set of a fixed subframe, which may be referred to as a fixed subframe set
  • the second downlink subframe is A flexible subframe
  • the second downlink subframe set is a subframe set composed of flexible subframes, and may be referred to as a flexible subframe set.
  • the user equipment may report partial channel state information or all channel state information to the network side device.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment determines the determined All channel status information is reported.
  • the PUCCH overhead may be doubled due to the reporting of multiple channel state information, especially for periodic reporting. Exceeding the original bearer capacity of some original transport formats.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network.
  • the first transmission resource configured by the side device transmits the channel state information measured on the fixed downlink subframe, and the second transmission resource configured by the network side device, and the transmission is measured on the at least one flexible downlink subframe.
  • Channel status information is measured on the at least one flexible downlink subframe.
  • the user equipment may transmit the channel state information measured on the fixed downlink subframe by using the format 2a, and may transmit the channel state information measured on the at least one flexible downlink subframe by using the format 2b.
  • different channel state information uses different resources. For transmission, it can meet the requirement of transmitting multiple channel state information.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network.
  • the third transmission resource configured by the side device transmits part or all of the determined channel state information of the at least one channel state information.
  • the user equipment may use Format 3 to transmit the determined at least one channel state information by using the third transmission resource configured by the network side device. Part or all of the channel status information. Because Format 3 can transmit a large number of bits in TDD mode, it generally meets the transmission requirements.
  • the user equipment may first determine to transmit the The cost required by the at least one channel state information, determining whether the cost is greater than a maximum number of transmission bits that the third transmission resource can transmit, if the overhead is greater than a maximum number of transmission bits that the third transmission resource can transmit, the user The device may select the channel state information to be reported from the determined at least one channel state information according to the priority of each channel state information in the at least one channel state, where the selected channel state information to be reported is not greater than The maximum number of transmitted bits.
  • the user equipment may select channel state information with high priority to report according to the priority of each channel state from high to low. After the selection, the user equipment may transmit the selected channel state information that needs to be reported through the third transmission resource configured by the network side device. This can ensure the success of the report as much as possible.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment reports the specific and specific
  • the at least one channel state information is measured on a downlink subframe of the same subframe set of the subframe, where the specific subframe is a fixed subframe or a flexible subframe.
  • the user equipment may report the channel state information measured on the downlink subframe of the same subframe set as the current uplink subframe to the network side device.
  • the user equipment may directly The channel state information measured on the fixed subframe is reported to the network side device. In this way, only one channel state information needs to be transmitted, which greatly saves the reporting overhead, and can also meet the requirements of the network side device.
  • the flexible subframe may be caused by the user equipment not receiving or not correctly receiving the configuration signaling sent by the network side device, thereby causing up/down confusion.
  • the reliability of reporting the status information of flexible sub-frames is sometimes not guaranteed, and the fixed sub-frames do not appear to be confusing in the uplink and downlink.
  • the reporting of channel status information is relatively stable. For this reason, if the current uplink subframe is a fixed subframe, the user equipment can not only report the channel state information measured on the fixed subframe to the network side device, but also report the above in the flexible subframe.
  • the channel state information measured on the frame that is, if the specific subframe is a fixed subframe
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device,
  • the user equipment may report, to the network side device, the measured at least one channel state information on a downlink subframe that is different from the specific subframe.
  • the user equipment may Reporting, by the network side device, channel state information measured on the flexible subframe, or because the flexible subframe may be divided into multiple flexible subframe sets due to different interference, the user equipment may be sent to the network The side device reports multiple channel state information, where each channel state information corresponds to one flexible subframe set.
  • the user equipment may report the channel state information measured on the flexible subframe to the network side device, or because the flexible device
  • the frame may be divided into multiple flexible subframe sets due to different interference, and the user equipment may have multiple channel state information, where each channel state information corresponds to one flexible subframe set.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network.
  • the first transmission resource configured by the side device transmits the channel state information measured on the fixed downlink subframe, and the second transmission resource configured by the network side device, and the transmission is measured on the at least one flexible downlink subframe. Channel status information.
  • the user equipment may transmit channel state information measured on a fixed downlink subframe through Format 2a, and may transmit channel state information measured on the at least one flexible downlink subframe through Format 2b.
  • channel state information is transmitted by using different resources, which can meet the requirement of transmitting multiple channel state information.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment passes the network.
  • the third transmission resource configured by the side device transmits part or all of the determined channel state information of the at least one channel state information.
  • the user equipment may use Format 3 to transmit the determined at least one channel state information by using the third transmission resource configured by the network side device. Part or all of the channel status information. Because Format 3 can transmit a large number of bits in TDD mode, it generally meets the transmission requirements.
  • the user equipment may first determine to transmit the The cost required by the at least one channel state information, determining whether the cost is greater than a maximum number of transmission bits that the third transmission resource can transmit, if the overhead is greater than a maximum number of transmission bits that the third transmission resource can transmit, the user The device may select the channel state information to be reported from the determined at least one channel state information according to the priority of each channel state information in the at least one channel state, where the selected channel state information to be reported is not greater than The maximum number of transmitted bits.
  • the user equipment may select channel state information with high priority to report according to the priority of each channel state from high to low. After the selection, the user equipment may transmit the selected channel state information that needs to be reported through the third transmission resource configured by the network side device. This can ensure the success of the report as much as possible.
  • the user equipment may report, to the network side device, channel state information measured on a downlink subframe of the same subframe set as the next N downlink subframes, where N is a positive integer.
  • the N may be 1, that is, the user equipment may report the channel state information measured on the downlink subframe of the same subframe set as the next downlink subframe to the network side device.
  • the user equipment may directly report the channel state information measured on the fixed subframe to the network side device. In this way, only one channel state information is transmitted, which greatly saves the reporting overhead, and can also meet the requirements of the network side device.
  • the user equipment may report the channel state information measured on the flexible subframe to the network side device, or
  • the frame may be divided into multiple flexible subframe sets due to different interferences, and the user equipment may have multiple channel state information, where each channel state information corresponds to a flexible subframe, which is preferred in the embodiment of the present invention.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment may transmit the determined third transmission resource configured by the network side device. Part or all of the channel state information of the at least one channel state information.
  • the user equipment may use Format 3 to transmit the determined at least one channel state information by using the third transmission resource configured by the network side device. Part or all of the channel status information. Because Format 3 can transmit a large number of bits in TDD mode, it generally meets the transmission requirements.
  • the user equipment may first determine an overhead required to transmit the at least one channel state information, and determine whether the overhead is greater than a maximum transmission that the third transmission resource can transmit. a number of bits, if the overhead is greater than a maximum number of transmission bits that the third transmission resource can transmit, the user equipment may determine the at least one channel according to a priority of each channel state information in the at least one channel state.
  • the channel state information to be reported is selected in the status information, and the selected channel state information to be reported is not greater than the maximum number of transmission bits.
  • the user equipment may select channel state information with high priority to report according to the priority of each channel state from high to low. After the selection, the user equipment may transmit the selected channel state information that needs to be reported through the third transmission resource configured by the network side device.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment is to the network side device.
  • the channel state information measured on the fixed downlink subframe is reported.
  • the user equipment may only report the channel state information measured on the fixed downlink subframe to the network side device.
  • the network side device can store the difference. Then, when the network side device obtains the channel state information measured on the fixed downlink subframe, if the required channel state information is the channel state information measured on the fixed downlink subframe, the network side device may Directly used, if the required channel state information is channel state information measured on the flexible downlink subframe, the network side device may obtain the flexible downlink according to the received channel state information and the known difference value. The channel state information measured on the frame can be applied.
  • the network side device may receive at least one channel state information reported by the user equipment.
  • the user equipment may report only one channel state information, or may report multiple channel state information.
  • the channel state information may be channel state information measured on a fixed subframe, or may be channel state information measured on a flexible subframe.
  • the multiple channel state information may be The channel state information measured only on a plurality of flexible subframes may be included, or the channel state information measured on the flexible subframe may be included, and the channel state information measured on the fixed subframe may also be included.
  • the network side device determines a modulation and coding manner of the downlink subframe according to the channel state information. If the network side device receives only one channel state information reported by the user equipment, the network side device may determine, according to the channel state information, a modulation and coding mode of the subsequent Nth downlink subframe.
  • the network side device may separately determine a subframe set in which the subframe corresponding to the multiple channel state information is located, that is, determine each channel state.
  • the information corresponds to a fixed subframe or a flexible subframe, respectively, wherein the subframe corresponding to one channel state information may be a subframe used when the user equipment measures the channel state information.
  • the network side device may use the subframe corresponding to the Nth downlink subframe for the Nth downlink subframe.
  • the channel state information of the set determines the modulation and coding mode of the downlink subframe.
  • an embodiment of the present invention provides a user equipment, where the user equipment may include a first determining module 401 and a reporting module 402.
  • the first determining module 401 is operative to determine at least one channel state information, the at least one channel state information being channel state information of at least one subframe or at least one subframe set.
  • the reporting module 402 can be configured to report some or all of the determined channel state information to the network side device.
  • the reporting module 402 reports some or all of the channel state information in the determined at least one channel state information to the network side device, where specifically: the reporting channel 402 determines all channel states. Information is reported.
  • the first determining module 401 may determine the channel state information measured on a fixed subframe, and the channel state information measured on the flexible subframe, and the reporting module 402 may These channel status information are reported.
  • the first determining module 401 is specifically configured to determine channel state information measured on a first downlink subframe or a downlink subframe of the first downlink subframe set, and determine the at least one second downlink subframe or Channel state information measured on a downlink subframe of at least one second downlink subframe set.
  • the first downlink subframe is a fixed subframe
  • the second downlink subframe is a flexible subframe
  • the first downlink subframe set is a fixed subframe set
  • the second downlink subframe set is a flexible subframe set
  • the UE may only determine one channel state information measured on a fixed subframe, and determine a channel state information measured on the flexible subframe.
  • the user equipment can simultaneously determine the channel state information measured on the fixed subframe, and determine the channel state information measured on the flexible subframe, and the user equipment can report the channel state information to the
  • the network side device the network side device may select the channel state information required by the network side device for application, and the modulation and coding mode determined according to the channel state information may be more accurate, or the user equipment may directly use the network
  • the channel state information required by the side device is reported, which not only saves the overhead required for reporting, but also meets the requirements of the network side device, and can make the modulation and coding mode determined according to the channel state information more accurate.
  • the obtained at least one channel state information is measured; wherein, the specific subframe is a fixed subframe or a flexible subframe.
  • the reporting module 402 may also obtain the at least one channel state information.
  • the specific subframe is an uplink subframe that transmits the at least one channel state information, or an Nth downlink subframe after the uplink subframe that transmits the at least one channel state information, where N is positive Integer.
  • the user equipment reports the determined manner to the network side device
  • the part or all of the channel state information of the at least one channel state information may be: the user equipment reports the at least one channel state information measured on a downlink subframe of the same subframe set as the specific subframe, where , a specific subframe is a fixed subframe or a flexible subframe.
  • the user equipment may report the channel state information measured on the downlink subframe of the same subframe set as the current uplink subframe to the network side device.
  • the current uplink subframe refers to an uplink subframe used for transmitting the at least one channel state information.
  • the user equipment may report the channel state information measured on the fixed subframe to the network side device, if the current uplink subframe is a flexible subframe.
  • the user equipment may report the channel state information measured on the flexible subframe to the network side device.
  • the user equipment may directly report the channel state information measured on the fixed subframe to the network side device. In this way, only one channel state information is transmitted, which greatly saves the reporting overhead, and can also meet the requirements of the network side device.
  • the flexible subframe may be caused by the user equipment not receiving or not correctly receiving the configuration signaling sent by the network side device, thereby causing up/down confusion.
  • the reliability of reporting the status information of flexible sub-frames is sometimes not guaranteed, and the fixed sub-frames do not appear to be confusing in the uplink and downlink.
  • the reporting of channel status information is relatively stable. For this reason, if the current uplink subframe is a fixed subframe, the user equipment can not only report the channel state information measured on the fixed subframe to the network side device, but also report the above in the flexible subframe.
  • the channel state information measured on the frame that is, if the specific subframe is a fixed subframe
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device,
  • the user equipment may report, to the network side device, the measured at least one channel state information on a downlink subframe that is different from the specific subframe.
  • the user equipment may report, to the network side device, a channel state signal measured on the flexible subframe. Or, because the flexible subframe may be divided into multiple flexible subframe sets due to different interference, the user equipment may have multiple channel state information, where each channel state information corresponds to one flexible subframe set.
  • the user equipment may report, to the network side device, channel state information measured on a downlink subframe of the same subframe set as the next N downlink subframes, where N is a positive integer.
  • the N may be 1, that is, the user equipment may report the channel state information measured on the downlink subframe of the same subframe set as the next downlink subframe to the network side device.
  • the lower N is: the Nth downlink subframe after transmitting the at least one channel state information, for example, the next downlink subframe is the first downlink after transmitting the at least one channel state information frame.
  • the user equipment reports to the network side device that the same as the next N downlink subframes, because the channel state information reported by the UE is used to perform the next downlink scheduling for the network side device, and the MCS is selected for reference.
  • the channel state information measured on the downlink subframe of the frame set is obviously effective, and can be directly used by the network side device.
  • the user equipment may directly report the channel state information measured on the fixed subframe to the network side device. In this way, only one channel state information is transmitted, which greatly saves the reporting overhead, and can also meet the requirements of the network side device.
  • the user equipment may report the channel state information measured on the flexible subframe to the network side device, or
  • the frame may be divided into multiple flexible subframe sets, and the user equipment may have multiple channel state information, where each channel state information corresponds to one flexible subframe.
  • the PUCCH overhead may be caused by reporting multiple channel state information. Times, there may be an original bearer capacity that exceeds some of the original transport formats.
  • Format 2/2a/2b/3 (control Format 2 of the signaling format 2/ control signaling format 2b/control signaling format 3) can be used to transmit channel state information during periodic reporting, but the format of each control signaling There is a maximum information bit limit that can be transmitted.
  • Format 2 can transmit up to 11 bits
  • Format 2a can transmit up to 12 bits (including 1 bit of A/N (positive acknowledgement/negative acknowledgement), and only 11 bits for channel state information).
  • Format 2b The maximum transmission capacity is 13 bits (in which 2 bits of A/N are required, and the space for transmitting channel state information is only 11 bits)
  • Format 3 can transmit up to 11 bits under FDD and 21 bits in TDD. It can be seen that for a format of control signaling, the transmission requirement in the embodiment of the present invention may not be satisfied.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment may be: The first transmission resource configured by the network side device, the channel state information measured on the fixed downlink subframe, and the second transmission resource configured by the network side device, and the transmission is measured on the at least one flexible downlink subframe The obtained channel state information.
  • the user equipment reports some or all of the channel state information in the determined at least one channel state information to the network side device, where the user equipment is The third transmission resource configured by the network side device transmits part or all of the determined channel state information of the at least one channel state information.
  • the user equipment may use Format 3 to transmit the determined at least one channel state information by using the third transmission resource configured by the network side device. Part or all of the channel status information. Because Format 3 can transmit a large number of bits in TDD mode, it generally meets the transmission requirements.
  • the user equipment may first determine an overhead required to transmit the at least one channel state information, and determine whether the overhead is greater than a maximum number of transmission bits that the third transmission resource can transmit, if the overhead is greater than the third transmission resource can transmit.
  • the maximum number of transmission bits the user equipment may according to the priority of each channel state information in the at least one channel state
  • the channel state information to be reported is selected from the determined at least one channel state information, wherein the selected channel state information to be reported is not greater than the maximum number of transmission bits.
  • the user equipment may select channel state information with high priority to report according to the priority of each channel state from high to low. After the selection, the user equipment may transmit the selected channel state information that needs to be reported through the third transmission resource configured by the network side device.
  • the user equipment if the user equipment needs to report the plurality of channel state information measured on the flexible subframe to the network side device, then, in the embodiment of the present invention, the user equipment is And transmitting, by the network device, some or all of the channel state information of the at least one channel state information, where the user equipment transmits the determined at least one by using the third transmission resource configured by the network side device. Part or all of the channel state information in the channel state information.
  • the user equipment may use Format 3 to transmit the determined at least one channel state information by using the third transmission resource configured by the network side device. Part or all of the channel status information. Because Format 3 can transmit a large number of bits in TDD mode, it generally meets the transmission requirements.
  • the user equipment may first determine an overhead required to transmit the at least one channel state information, and determine whether the overhead is greater than a maximum number of transmission bits that the third transmission resource can transmit, if the overhead is greater than the third transmission resource can transmit. a maximum number of transmission bits, the user equipment may select channel state information to be reported from the determined at least one channel state information according to a priority of each channel state information in the at least one channel state, where the selected need to report The overhead of the channel state information is not greater than the maximum number of transmission bits. Specifically, the user equipment may select channel state information with high priority to report according to the priority of each channel state from high to low. After the selection, the user equipment may transmit the selected channel state information that needs to be reported through the third transmission resource configured by the network side device.
  • the reporting module 402 is specifically configured to use the first transmission resource configured by the network side device.
  • the channel state information measured on the fixed downlink subframe is transmitted, and the channel state information measured on the at least one flexible downlink subframe is transmitted by using the second transmission resource configured by the network side device.
  • the reporting module 402 is specifically configured to transmit part or all of the determined channel state information in the determined at least one channel state information by using the third transmission resource configured by the network side device.
  • the reporting module 402 is specifically configured to transmit, by using the third transmission resource configured by the network side device, some or all of the channel state information in the determined at least one channel state information, specifically: using a third control signaling Format Format 3, transmitting part or all of the determined channel state information in the determined at least one channel state information by using the third transmission resource configured by the network side device.
  • the reporting module 402 is specifically configured to: transmit, by using the third transmission resource configured by the network side device, part or all of the channel state information in the determined at least one channel state information, specifically: if the at least one channel is determined The cost of the state information is greater than the maximum number of transmission bits, and the channel state information to be reported is selected from the determined at least one channel state information according to the priority of the channel state information, wherein the selected channel state information to be reported is not more than The maximum number of transmission bits; the selected channel state information that needs to be reported is transmitted through the third transmission resource configured by the network side device.
  • the reporting module 402 is specifically configured to report, to the network side device, channel state information measured on a fixed downlink subframe.
  • the user equipment may only report the channel state information measured on the fixed downlink subframe to the network side device.
  • the network side device can store the difference. Then, when the network side device obtains the channel state information measured on the fixed downlink subframe, if the required channel state information is the channel state information measured on the fixed downlink subframe, the network side device may Direct use, if the required channel state information is the channel state information measured on the flexible downlink subframe, then The network side device may obtain channel state information measured on the flexible downlink subframe according to the received channel state information and the known difference, so that the network side device may be applied.
  • an embodiment of the present invention provides a network side device, where the network side device may include a receiving module 501 and a second determining module 502.
  • the receiving module 501 can be configured to receive at least one channel state information reported by the user equipment.
  • the second determining module 502 can be configured to determine a modulation coding mode of the downlink subframe according to the channel state information.
  • the receiving module 501 is specifically configured to receive a channel state information reported by the user equipment.
  • the channel state information may be channel state information measured on a fixed subframe, or may be channel state information measured on a flexible subframe.
  • the second determining module 502 is specifically configured to determine, according to the channel state information, a modulation and coding mode of the Nth downlink subframe, where N is a positive integer.
  • the channel state information may include only channel state information measured on multiple flexible subframes, or may be included in the flexible subframe.
  • the channel state information also includes channel state information measured on a fixed subframe.
  • the network side device may determine, according to the channel state information, a subsequent Nth downlink subframe. Modulation coding method.
  • the receiving module 501 is specifically configured to receive multiple channel state information reported by the user equipment.
  • the second determining module 502 is specifically configured to determine a subframe set in which the subframe corresponding to the multiple channel state information is located, where the subframe corresponding to the channel state information is a subframe used when the user equipment measures channel state information;
  • the Nth downlink subframe uses the channel state information of the subframe set in which the Nth downlink subframe is located to determine a modulation and coding mode of the downlink subframe.
  • the network side device may separately determine a subframe set in which the subframe corresponding to the multiple channel state information is located, that is, determine whether each channel state information corresponds to a fixed subframe or a flexible subframe, where one channel
  • the subframe corresponding to the status information may be a subframe used when the user equipment measures the channel state information.
  • the network side device may use the subframe corresponding to the second downlink subframe for the second downlink subframe.
  • the channel state information of the set determines the modulation and coding mode of the downlink subframe.
  • an embodiment of the present invention provides a user equipment, where the user equipment may include a first processor 601 and a sending interface 602.
  • the user equipment in the fifth embodiment and the user equipment in the first embodiment to the fourth embodiment may be the same user equipment
  • the network side equipment in the fifth embodiment and the first to fourth embodiments may be the same network side device.
  • the first processor 601 can be configured to determine at least one channel state information, the at least one channel state information being channel state information of at least one subframe or at least one subframe set.
  • the sending interface 602 is configured to report some or all of the determined channel state information of the at least one channel state information to the network side device.
  • the first processor 601 may be specifically configured to determine channel state information measured on a first downlink subframe or a downlink subframe of the first downlink subframe set, and determine the at least one second downlink subframe or Channel state information measured on a downlink subframe of at least one second downlink subframe set.
  • the first downlink subframe is a fixed subframe
  • the second downlink subframe is a flexible subframe
  • the first downlink subframe set is a fixed subframe set
  • the second downlink subframe set is a flexible subframe set
  • the sending interface 602 is specifically configured to report the measured at least one channel state information on a downlink subframe that is the same subframe group as the specific subframe.
  • the specific subframe is a fixed subframe or a flexible subframe. In the embodiment of the present invention, if the specific subframe is a fixed subframe, the sending interface 602 may also obtain the at least one channel state information.
  • the specific subframe is an uplink subframe that transmits the at least one channel state information, or an Nth downlink subframe after the uplink subframe that transmits the at least one channel state information, where N is positive Integer.
  • the sending interface 602 is specifically configured to: transmit, by using the first transmission resource configured by the network side device, channel state information measured on a fixed downlink subframe, and a second transmission resource configured by the network side device, where the transmission is performed. Channel state information measured on the at least one flexible downlink subframe.
  • the sending interface 602 is specifically configured to transmit part or all of the determined channel state information in the determined at least one channel state information by using the third transmission resource configured by the network side device.
  • the sending interface 602 is specifically configured to: transmit, by using the third transmission resource configured by the network side device, part or all of the channel state information in the determined at least one channel state information, specifically: adopting a third type of control signaling Format Format 3, transmitting part or all of the determined channel state information in the determined at least one channel state information by using the third transmission resource configured by the network side device.
  • the sending interface 602 is specifically configured to: transmit, by using the third transmission resource configured by the network side device, some or all of the channel state information in the determined at least one channel state information, where specifically: the determined at least one channel The cost of the state information is greater than the maximum number of transmission bits, and the channel state information to be reported is selected from the determined at least one channel state information according to the priority of the channel state information, wherein the selected channel state information to be reported is not more than The maximum number of transmission bits; the selected channel state information that needs to be reported is transmitted through the third transmission resource configured by the network side device.
  • the sending interface 602 is specifically configured to report, to the network side device, channel state information measured on a fixed downlink subframe.
  • Example 7 Referring to FIG. 7, an embodiment of the present invention provides a network side device, where the network side device may include an obtaining interface 701 and a second processor 702.
  • the user equipment in the sixth embodiment and the user equipment in the first embodiment to the fifth embodiment may be the same user equipment, and the network side equipment in the sixth embodiment and the first to fifth embodiments
  • the network side device may be the same network side device.
  • the obtaining interface 701 can be configured to receive at least one channel state information reported by the user equipment.
  • the second processor 702 can be configured to determine a modulation and coding mode of the downlink subframe according to the channel state information.
  • the obtaining interface 701 is specifically configured to receive a channel state information reported by the user equipment.
  • the second processor 702 is specifically configured to determine, according to the channel state information, a modulation and coding mode of the subsequent Nth downlink subframe, where N is a positive integer.
  • the obtaining interface 701 is specifically configured to receive multiple channel state information reported by the user equipment.
  • the second processor 702 is specifically configured to determine a subframe set in which the subframe corresponding to the multiple channel state information is located, where the subframe corresponding to the channel state information is a subframe used when the user equipment measures channel state information;
  • the Nth downlink subframe uses the channel state information of the subframe set in which the Nth downlink subframe is located to determine a modulation and coding mode of the downlink subframe.
  • the method for reporting channel state information in the embodiment of the present invention may include: determining, by the user equipment, at least one channel state information, where the at least one channel state information is channel state information of at least one subframe or at least one subframe set; The device reports some or all of the determined channel state information in the determined at least one channel state information to the network side device.
  • the user equipment may determine the at least one channel state information, so that part or all of the channel state information in the at least one channel state information may be reported to the network side device. For example, the user equipment may determine the at least one channel state information according to the requirement of the network side device, or the user equipment may report the multiple channel state information to the network side device, The network side device selects one of the channel state information for application. In this way, if the network side device needs to obtain the CSI obtained by the flexible subframe measurement, the user equipment may use the latest CSI measured by the latest flexible subframe.
  • the user equipment may report the latest CSI obtained by the last fixed subframe measurement, thereby avoiding the possibility in the prior art. The error occurs, try to ensure that the determined MCS is more accurate and improve the transmission efficiency.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection between the various components shown or discussed may be an indirect connection or communication connection through some interface, device or unit, and may be in electrical, mechanical or other form.
  • the components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present application 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 function 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.
  • a computer device which may be a personal computer, a server, or a network device, etc.
  • a processor Processor
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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Abstract

La présente invention se rapporte au domaine technique des communications, et concerne, particulièrement, un procédé et un dispositif pour rapporter des informations d'état de canal et déterminer un procédé de modulation et de codage, qui sont utilisés pour résoudre le problème technique dans l'état antérieur de la technique de précision insuffisante lorsqu'un procédé de modulation et de codage (MCS) d'une sous-trame de liaison descendante est déterminée. Dans les modes de réalisation de la présente invention, un équipement utilisateur détermine au moins un élément d'informations d'état de canal puis rapporte à un dispositif côté réseau certaines ou l'ensemble des informations d'état de canal dans ledit élément d'informations d'état de canal déterminé, de façon à permettre aux informations d'état de canal rapportées au dispositif côté réseau de contenir des informations d'état de canal satisfaisant des demandes du dispositif côté réseau, de telle sorte que la précision du dispositif côté réseau lors de la détermination de la MCS de la sous-trame de liaison descendante peut être améliorée.
PCT/CN2013/083018 2013-09-05 2013-09-05 Procédé et dispositif pour rapporter des informations d'état de canal et déterminer un procédé de modulation et de codage Ceased WO2015032057A1 (fr)

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PCT/CN2013/083018 WO2015032057A1 (fr) 2013-09-05 2013-09-05 Procédé et dispositif pour rapporter des informations d'état de canal et déterminer un procédé de modulation et de codage
CN201380002373.6A CN103748820B (zh) 2013-09-05 2013-09-05 上报信道状态信息、确定调制编码方式的方法及装置

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