WO2016145918A1 - 一种预编码类型指示的取值确定方法及装置 - Google Patents

一种预编码类型指示的取值确定方法及装置 Download PDF

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Publication number
WO2016145918A1
WO2016145918A1 PCT/CN2015/097953 CN2015097953W WO2016145918A1 WO 2016145918 A1 WO2016145918 A1 WO 2016145918A1 CN 2015097953 W CN2015097953 W CN 2015097953W WO 2016145918 A1 WO2016145918 A1 WO 2016145918A1
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broadband
pmi
downlink channel
determining
time
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PCT/CN2015/097953
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English (en)
French (fr)
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白文岭
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电信科学技术研究院
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method and a device for determining a value of a precoding type indication.
  • Spatial multiplexing is a multi-antenna transmission method commonly used in wireless communication systems.
  • the transmission mode 4, the transmission mode 9 and the transmission mode 10 of the Physical Downlink Shared Channel (PDSCH) of the Long Term Evolution (LTE) system belong to a spatially multiplexed multi-antenna transmission mode.
  • PDSCH Physical Downlink Shared Channel
  • LTE Long Term Evolution
  • the receiver can feed back the current channel state information to the transmitting end.
  • the terminal in order to improve the transmission performance of the LTE system PDSCH, the terminal generally feeds back channel state information (CSI) to the base station, including: a channel quality indicator (CQI), and a precoding matrix indicator (Precoding Matrix Indicator, PMI) and rank indication (RI).
  • CSI channel state information
  • CQI represents the quality information of the channel, and the channel quality is characterized by the recommended modulation and coding mode.
  • the higher order modulation coding mode indicates better performance;
  • the PMI characterizes the channel's feature vector information is the precoding matrix;
  • RI indicates that the channel can support The number of layers of spatial multiplexing.
  • the CSI feedback in the LTE system includes periodic feedback and aperiodic feedback.
  • the periodic feedback is mainly carried on the physical uplink control channel (PUCCH); the non-periodic feedback is carried on the physical uplink shared channel (PUSCH).
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • the PUCCH period feedback in the LTE system is divided into four types of feedback, as shown in Table 1 below:
  • Mode 2-1 requires feedback of wideband PMI and wideband CQI, in addition to two wideband CQIs.
  • the subband identifier and the subband CQI selected by each bandwidth portion (Band Part, BP) are sequentially fed back in the reporting interval.
  • the LTE system supports 8-antenna downlink multi-antenna transmission in the R10 and higher standards.
  • two PMIs of the first PMI and the second PMI are defined to indicate pre-coding matrix information, where the first PMI represents the attribute of the broadband or long-term channel, and the second PMI represents the determined frequency band. Or the properties of the short-term channel.
  • LTE-A Enhanced Long Term Evolution
  • PTI Precoding Type Indicator
  • the base station notifies the type of the feedback report reported by the terminal.
  • the LTE standard specifies the reporting process of the CSI feedback report when the PTI value is known, but does not provide a specific method for determining the value of the PTI. That is, there is currently no solution to determine the type of feedback report reported by the terminal.
  • a method for determining a value of a precoding type indication includes:
  • the first implementation to determine the downlink channel change is as follows:
  • the first implementation manner of determining the value of the PTI reported this time is as follows:
  • the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, it is determined that the value of the PTI reported in this time is 1; otherwise, the value of the PTI reported this time is determined. Is 0.
  • the second implementation to determine the downlink channel change is as follows:
  • the current report is determined.
  • the value of the PTI is 1; otherwise, the value of the PTI reported this time is 0.
  • the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, it is determined whether the broadband first PMI of the downlink channel changes during the current PTI reporting period.
  • the third implementation to determine the downlink channel change is as follows:
  • the third implementation manner of determining the value of the PTI reported this time is as follows:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, determining the PTI of the current report. The value is 1; otherwise, the value of the PTI reported this time is 0.
  • the determining, by the current downlink subframe, the broadband first PMI, determining whether the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and determining a time-varying characteristic of the downlink channel include:
  • the time-varying characteristic of the downlink channel is determined.
  • the fourth implementation to determine the downlink channel change is as follows:
  • the fourth implementation manner of determining the value of the PTI reported this time is as follows:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel is The time-varying characteristic indicates that the downlink channel changes slowly, and the value of the PTI reported in this time is determined to be 1; otherwise, the value of the PTI reported in this time is determined to be 0.
  • broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, it is determined whether the broadband first PMI of the downlink channel changes during the current PTI reporting period;
  • the time-varying characteristic of the downlink channel is determined.
  • the fifth implementation to determine the downlink channel change is as follows:
  • the fifth implementation manner of determining the value of the PTI reported in this time is as follows:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, and the frequency of the downlink channel changes. If the characteristic indicates that the frequency of the downlink channel is not flat, it is determined that the value of the PTI reported in this time is 1; otherwise, the value of the PTI reported in this time is 0.
  • the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, determining a frequency change of the downlink channel Sex.
  • the sixth implementation to determine the downlink channel change is as follows:
  • the sixth implementation manner of determining the value of the PTI reported this time is as follows:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel is
  • the time-varying characteristic indicates that the downlink channel changes slowly, and the frequency-variation characteristic of the downlink channel indicates that the frequency of the downlink channel is not flat, and the value of the PTI that is reported this time is determined to be 1; otherwise, the current report is determined.
  • the value of PTI is 0.
  • broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, it is determined whether the broadband first PMI of the downlink channel changes during the current PTI reporting period;
  • the broadband first PMI of the downlink channel does not change during the current PTI reporting period, determining a time-varying characteristic of the downlink channel
  • the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, determining a frequency-varying characteristic of the downlink channel.
  • the comparison between the correlation time of the broadband first PMI of the downlink channel and the PTI reporting period determines whether the first PMI of the downlink channel changes during the current PTI reporting period.
  • the time for obtaining the broadband first PMI of the downlink channel includes:
  • the maximum time interval in which the correlation is greater than the correlation threshold is determined as the correlation time of the broadband first PMI of the downlink channel.
  • the determining the time-varying characteristics of the downlink channel according to the third, fourth, fifth, and sixth implementation manners for determining the downlink channel change situation includes:
  • Determining a Doppler shift of the downlink channel determining a time-varying characteristic of the downlink channel by comparing the Doppler shift to a Doppler shift threshold; or
  • the correlation time of the broadband second PMI of the channel and the correlation time of the wideband CQI are compared to determine the time-varying characteristics of the downlink channel.
  • the broadband second PMI and the wideband CQI may also be expressed as a broadband second PMI/broadband CQI, which refers to a broadband second PMI and a wideband CQI that are simultaneously reported.
  • the time for obtaining the broadband second PMI of the downlink channel includes:
  • the time for obtaining the broadband CQI includes:
  • the smoothed value of the time interval is determined as the correlation time of the wideband CQI of the downlink channel.
  • the fifth and sixth implementation manners for determining a downlink channel change where the determining the frequency change characteristic of the downlink channel includes:
  • Determining a multipath delay spread of the downlink channel comparing the multipath delay spread of the downlink channel with a multipath delay spread threshold to determine a frequency change characteristic of the downlink channel; or
  • Determining a maximum delay of the downlink channel Determining a maximum delay of the downlink channel; determining a frequency variation characteristic of the downlink channel by comparing the maximum delay of the downlink channel with a maximum delay threshold; or
  • a method for determining a value of a precoding type indication includes:
  • Determining whether the precoding type reported in the previous L times indicates whether the value of the PTI is 1 or not, and L is an integer greater than or equal to 1;
  • the embodiment of the present invention further provides a value determining device for the precoding type indication, which includes:
  • a channel condition determining module configured to determine a downlink channel change condition
  • the PTI determining module is configured to determine the value of the precoding type indication PTI that is reported this time according to the determined downlink channel change condition.
  • the channel situation determining module is configured to:
  • the PTI determination module is used to:
  • the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, it is determined that the value of the PTI reported in this time is 1; otherwise, the value of the PTI reported this time is determined. Is 0.
  • the channel situation determining module is configured to:
  • the PTI determination module is used to:
  • the current report is determined.
  • the value of the PTI is 1; otherwise, the value of the PTI reported this time is 0.
  • the channel situation determining module is configured to:
  • the PTI determination module is used to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, determining the PTI of the current report. The value is 1; otherwise, the value of the PTI reported this time is 0.
  • the channel situation determining module is configured to:
  • the PTI determination module is used to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel is The time-varying characteristic indicates that the downlink channel changes slowly, and the value of the PTI reported in this time is determined to be 1; otherwise, the value of the PTI reported in this time is determined to be 0.
  • the channel situation determining module is configured to:
  • the PTI determination module is used to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, and the frequency of the downlink channel changes. If the characteristic indicates that the frequency of the downlink channel is not flat, it is determined that the value of the PTI reported in this time is 1; otherwise, the value of the PTI reported in this time is 0.
  • the channel situation determining module is configured to:
  • the PTI determination module is used to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel is
  • the time-varying characteristic indicates that the downlink channel changes slowly, and the frequency-variation characteristic of the downlink channel indicates that the frequency of the downlink channel is not flat, and the value of the PTI that is reported this time is determined to be 1; otherwise, the current report is determined.
  • the value of PTI is 0.
  • the channel situation determining module is configured to: determine whether the broadband first PMI of the downlink channel changes during the current PTI reporting period, where
  • the comparison between the correlation time of the broadband first PMI of the downlink channel and the PTI reporting period determines whether the first PMI of the downlink channel changes during the current PTI reporting period.
  • the channel situation determining module when acquiring the correlation time of the broadband first PMI of the downlink channel, is configured to:
  • the maximum time interval in which the correlation is greater than the correlation threshold is determined as the correlation time of the broadband first PMI of the downlink channel.
  • the channel situation determining module when determining the time-varying characteristic of the downlink channel, is configured to:
  • Determining a Doppler shift of the downlink channel determining a time-varying characteristic of the downlink channel by comparing the Doppler shift to a Doppler shift threshold; or
  • the correlation time of the broadband second PMI of the channel and the correlation time of the wideband CQI are compared to determine the time-varying characteristics of the downlink channel.
  • the channel situation determining module when acquiring the correlation time of the broadband second PMI of the downlink channel, is configured to:
  • the smoothed value of the time interval is determined as the correlation time of the wideband second PMI of the downlink channel.
  • the channel situation determining module when acquiring the relevant time of the broadband CQI, is configured to:
  • the channel situation determining module when determining the frequency variation characteristic of the downlink channel, is configured to:
  • Determining a multipath delay spread of the downlink channel comparing the multipath delay spread of the downlink channel with a multipath delay spread threshold to determine a frequency change characteristic of the downlink channel; or
  • Determining a maximum delay of the downlink channel Determining a maximum delay of the downlink channel; determining a frequency variation characteristic of the downlink channel by comparing the maximum delay of the downlink channel with a maximum delay threshold; or
  • the embodiment of the present invention further provides a terminal, including:
  • a processor for reading a program in the memory performing the following process:
  • transceiver for receiving and transmitting data under the control of a processor
  • a memory that holds the data that the processor uses when performing operations.
  • a value determining device for precoding type indication includes:
  • a processor for reading a program in the memory performing the following process:
  • transceiver for receiving and transmitting data under the control of a processor
  • a memory that holds the data that the processor uses when performing operations.
  • the processor is configured to:
  • the processor is further configured to:
  • the value of the PTI reported in this report is 1; otherwise, the value of the PTI reported in this report is 0.
  • the processor is configured to:
  • the processor is further configured to:
  • the current report is determined.
  • the value of the PTI is 1; otherwise, the value of the PTI reported this time is 0.
  • the processor is configured to:
  • the processor is further configured to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, determining the PTI of the current report. The value is 1; otherwise, the value of the PTI reported this time is 0.
  • the processor is configured to:
  • the processor is further configured to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel is The time-varying characteristic indicates that the downlink channel changes slowly, and the value of the PTI reported in this time is determined to be 1; otherwise, the value of the PTI reported in this time is determined to be 0.
  • the processor is configured to:
  • the processor is further configured to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, and the frequency of the downlink channel changes. If the frequency of the downlink channel is not flat, the value of the PTI that is reported is 1; otherwise, the PTI reported this time is determined. The value is 0.
  • the processor is configured to:
  • the processor is further configured to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel is
  • the time-varying characteristic indicates that the downlink channel changes slowly, and the frequency-variation characteristic of the downlink channel indicates that the frequency of the downlink channel is not flat, and the value of the PTI that is reported this time is determined to be 1; otherwise, the current report is determined.
  • the value of PTI is 0.
  • the processor when it is determined whether the broadband first PMI of the downlink channel changes during the current PTI reporting period, the processor is configured to:
  • the comparison between the correlation time of the broadband first PMI of the downlink channel and the PTI reporting period determines whether the first PMI of the downlink channel changes during the current PTI reporting period.
  • the processor when acquiring the correlation time of the broadband first PMI of the downlink channel, is configured to:
  • the maximum time interval in which the correlation is greater than the correlation threshold is determined as the correlation time of the broadband first PMI of the downlink channel.
  • the processor when determining a time-varying characteristic of a downlink channel, is configured to:
  • Determining a Doppler shift of the downlink channel determining a time-varying characteristic of the downlink channel by comparing the Doppler shift to a Doppler shift threshold; or
  • the correlation time of the broadband second PMI of the channel and the correlation time of the wideband CQI are compared to determine the time-varying characteristics of the downlink channel.
  • the processor when acquiring the correlation time of the broadband second PMI of the downlink channel, is configured to:
  • the processor when acquiring the correlation time of the wideband CQI, is configured to:
  • the processor when determining a frequency variation characteristic of a downlink channel, is configured to:
  • Determining a multipath delay spread of the downlink channel comparing the multipath delay spread of the downlink channel with a multipath delay spread threshold to determine a frequency change characteristic of the downlink channel; or
  • Determining a maximum delay of the downlink channel Determining a maximum delay of the downlink channel; determining a frequency variation characteristic of the downlink channel by comparing the maximum delay of the downlink channel with a maximum delay threshold; or
  • the embodiment of the present invention further provides a value determining device for the precoding type indication, which includes:
  • the PTI history value judging module is configured to determine whether the precoding type of the previous L times report indicates that the value of the PTI is 1;
  • the PTI determining module is configured to: when the judgment result of the PTI history value judging module is yes, determine that the value of the PTI reported in the current time is 0; when the judgment result of the PTI history value judging module is no, The value of the PTI reported in this report is 1.
  • the embodiment of the present invention further provides a terminal, including:
  • a processor for reading a program in the memory performing the following process:
  • Determining whether the precoding type reported in the previous L times indicates whether the value of the PTI is 1 or not, and L is an integer greater than or equal to 1;
  • transceiver for receiving and transmitting data under the control of a processor
  • a memory that holds the data that the processor uses when performing operations.
  • the technical solution provided by the embodiment of the present invention provides a method and a device for determining a PTI, that is, a type of a feedback report reported by a terminal, and is used for controlling a feedback reporting process.
  • FIG. 1 is a schematic diagram of reporting of a PUCCH reporting mode 2-1 at an 8-antenna port;
  • FIG. 2 is a flowchart of a first method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a second method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a third method according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a fourth method according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of a fifth method according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of a sixth method according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of a seventh method according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of an eighth method according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a device according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of another apparatus according to an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • user equipment includes but is not limited to a mobile station (MS, Mobile Station), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset).
  • the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular"
  • RAN Radio Access Network
  • the user equipment can be a mobile phone (or "cellular"
  • the telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.
  • a base station may 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 Transceiver Station (BTS) 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), the invention is not limited.
  • BTS Base Transceiver Station
  • NodeB base station
  • NodeB evolved base station
  • LTE Long Term Evolutional Node B
  • FIG. 2 is a flowchart of a method for determining a value of a precoding type indication according to an embodiment of the present invention, which includes at least the following operations:
  • Step 200 Determine a downlink channel change.
  • Step 210 Determine the value of the PTI reported this time according to the determined downlink channel change.
  • Steps 200 and 210 can be performed only when the PTI needs to be reported, or after the PTI is reported last time.
  • the technical solution provided by the embodiment of the present invention provides a method for determining a PTI, that is, a type of a feedback report reported by a terminal, and is used to control a feedback reporting process.
  • the downlink channel change determined in step 200 includes at least some or all of the following conditions:
  • the broadband first PMI of the downlink channel changes, whether the broadband first PMI of the downlink channel changes, the time-varying characteristics of the downlink channel, and the frequency-varying characteristics of the downlink channel.
  • the time-varying characteristic refers to the characteristic that the downlink channel changes rapidly;
  • the frequency-variable characteristic refers to the characteristic that the frequency of the downlink channel is flat or not.
  • step 300 determines a broadband first PMI on the current downlink subframe
  • step 310 determines a broadband first PMI determined on the current downlink subframe and the last reported PMI. Whether the broadband first PMI is the same; correspondingly, the first implementation manner of step 210: if the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, step 320 is performed to determine the present The value of the PTI that is reported last is 1; otherwise, step 330 is performed to determine that the value of the PTI reported this time is 0.
  • the broadband first PMI determined on the current downlink subframe is the same as the bandwidth first PMI that is reported last time, the broadband first PMI does not need to be reported this time. Referring to FIG. 1, the value of the PTI reported in this report is determined as 1 Otherwise, this time, the first PMI of the broadband needs to be reported, and the value of the PTI reported this time is 0. It can be seen that the PTI determination mode provided in this embodiment can perform reasonable feedback according to actual conditions, thereby improving feedback control performance.
  • the current downlink subframe may be any one of the downlink subframes that are reported between the PTI and the current reported PTI. Any one of them can be in accordance with a prior agreement or configuration.
  • the method flow of the embodiment of the present invention is performed on a downlink subframe that is closest to the current PTI.
  • the second implementation manner of the step 200 is: determining a broadband first PMI on the current downlink subframe, determining whether the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, and determining the downlink channel. Whether the broadband first PMI changes during the current PTI reporting period; correspondingly, the second implementation of step 210 is as follows: if the broadband first PMI determined on the current downlink subframe and the last reported broadband first If the PMI is the same, and the first PMI of the downlink channel does not change during the current PTI reporting period, the PTI of the current report is determined to be 1; otherwise, the PTI of the current report is 0.
  • the bandwidth does not need to be reported this time.
  • the first PMI determines that the value of the PTI reported in this time is 1, otherwise, the current first PMI needs to be reported, and the value of the PTI reported this time is 0. It can be seen that the PTI determination mode provided in this embodiment can perform reasonable feedback according to actual conditions, thereby improving feedback control performance.
  • the timing of the two determinations is not limited. It can be determined whether the first broadband PMI determined on the current downlink subframe is the same as the broadband first PMI reported last time, or whether the first PMI of the downlink channel changes during the current PTI reporting period.
  • the method of the method provided by the embodiment of the present invention is as shown in FIG. 4, and specifically includes the following operations:
  • Step 400 Determine a broadband first PMI on the current downlink subframe.
  • Step 410 Determine whether the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI. If they are the same, go to step 420. Otherwise, go to step 430.
  • Step 420 Determine whether the first PMI of the downlink channel changes during the current PTI reporting period. If yes, go to step 430. Otherwise, go to step 440.
  • Step 430 Determine that the value of the PTI is 0.
  • Step 440 Determine that the value of the PTI is 1.
  • the third implementation manner of the step 200 is: determining a broadband first PMI in the current downlink subframe, determining whether the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, and determining the downlink channel.
  • Time varying characteristic correspondingly, the third implementation of step 210: if the broadband first PMI determined in the current downlink subframe The value of the PTI reported in this report is 0. If the time-varying characteristic of the downlink channel is the same as the time-varying characteristic of the downlink channel, the value of the PTI is 0. .
  • the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, and the downlink channel changes slowly, the broadband first PMI does not need to be reported this time, and the present report is determined according to FIG. The value of the PTI is 1. Otherwise, the first PMI of the broadband is reported. The value of the PTI reported this time is 0. It can be seen that the PTI determination mode provided in this embodiment can perform reasonable feedback according to actual conditions, thereby improving feedback control performance.
  • the timing of the two determinations is not limited. It can be determined whether the first broadband PMI determined on the current downlink subframe is the same as the bandwidth first PMI reported last time, or the time-varying characteristics of the downlink channel can be determined first.
  • the method of the method provided by the embodiment of the present invention is as shown in FIG. 5, and specifically includes the following operations:
  • Step 500 Determine a broadband first PMI in the current downlink subframe.
  • Step 510 Determine whether the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI. If yes, go to step 520. Otherwise, go to step 530.
  • Step 520 Determine a time-varying characteristic of the downlink channel, that is, determine whether the downlink channel changes rapidly. If the time-varying characteristic of the downlink channel indicates that the downlink channel changes rapidly, perform step 530. If the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, Then step 540 is performed.
  • Step 530 Determine that the value of the PTI is 0.
  • Step 540 Determine that the value of the PTI is 1.
  • the fourth implementation manner of the step 200 is: determining the broadband first PMI in the current downlink subframe, determining whether the broadband first PMI determined in the current downlink subframe is the same as the broadband first PMI reported last time, and determining the bandwidth of the downlink channel. Whether a PMI changes during the current PTI period and determines the time-varying characteristic of the downlink channel; correspondingly, the fourth implementation manner of step 210: if the first PMI determined in the current downlink subframe is the last reported The broadband first PMI is the same, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, and the value of the PTI reported this time is determined. It is 1; otherwise, it is determined that the value of the PTI reported this time is 0.
  • the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel changes slowly.
  • the PTI of the present time is not required to be reported. Referring to Figure 1, the value of the PTI reported in this report is 1. Otherwise, the first PMI of the broadband is reported, and the value of the PTI reported is 0. It can be seen that the PTI determination mode provided in this embodiment can perform reasonable feedback according to actual conditions, thereby improving feedback control performance.
  • the timing of the three determinations is not limited. If it is first determined whether the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, finally determining the time-varying characteristic of the downlink channel,
  • the method flow provided by the embodiment of the present invention is as shown in FIG. 6 , and specifically includes the following operations:
  • Step 600 Determine a broadband first PMI in the current downlink subframe.
  • Step 610 Determine whether the broadband first PMI determined in the current downlink subframe is the same as the bandwidth first PMI that is reported last time. If yes, go to step 620. Otherwise, go to step 640.
  • Step 620 Determine whether the first PMI of the downlink channel changes during the current PTI reporting period. If yes, go to step 640. Otherwise, go to step 630.
  • Step 630 Determine a time-varying characteristic of the downlink channel, that is, determine whether the downlink channel changes rapidly. If the time-varying characteristic of the downlink channel indicates that the downlink channel changes rapidly, perform step 640. If the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, Then step 650 is performed.
  • Step 640 Determine that the value of the PTI is 0.
  • Step 650 Determine that the value of the PTI is 1.
  • the fifth implementation manner of the step 200 is: determining a broadband first PMI on the current downlink subframe, determining whether the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and determining the downlink channel.
  • the variable characteristic is determined, and the frequency-varying characteristic of the downlink channel is determined.
  • the fifth implementation manner of step 210 is as follows: if the broadband first PMI determined in the current downlink subframe is the same as the broadband first PMI reported last time, And the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, and the frequency-variation characteristic of the downlink channel indicates that the frequency of the downlink channel is not flat, and the value of the PTI reported in the present time is determined to be 1; otherwise, the current report is determined.
  • the value of PTI is 0.
  • the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, and the downlink channel changes slowly, and the frequency of the downlink channel is flat, the broadband first PMI does not need to be reported this time. 1.
  • the value of the PTI reported in this report is 1. Otherwise, the first PMI of the broadband needs to be reported, and the value of the PTI reported this time is 0. It can be seen that the PTI determination mode provided in this embodiment can perform reasonable feedback according to actual conditions, thereby improving feedback control performance.
  • This embodiment does not limit the timing of the three determinations. If it is determined that the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, and finally determining the frequency change characteristic of the downlink channel, the method flow provided by the embodiment of the present invention is as shown in FIG. 7 . Specifically, the following operations are included:
  • Step 700 Determine a broadband first PMI on a current downlink subframe.
  • Step 710 Determine whether the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI. If yes, perform step 720. Otherwise, perform step 740.
  • Step 720 Determine a time-varying characteristic of the downlink channel, that is, determine whether the downlink channel changes rapidly. If the time-varying characteristic of the downlink channel indicates that the downlink channel changes rapidly, perform step 740. If the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, Then step 730 is performed.
  • Step 730 Determine a frequency-varying characteristic of the downlink channel, that is, determine whether the downlink channel is flat. If the frequency-variation characteristic of the downlink channel indicates that the frequency of the downlink channel is flat, step 740 is performed, if the frequency-varying characteristic of the downlink channel is indicated. If the frequency of the line channel is not flat, step 750 is performed.
  • Step 740 Determine that the value of the PTI is 0.
  • Step 750 Determine that the value of the PTI is 1.
  • the sixth implementation manner of the step 200 is: determining a broadband first PMI on the current downlink subframe, determining whether the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and determining the bandwidth of the downlink channel.
  • the sixth implementation manner of step 210 is as follows: if the current downlink subframe is determined The broadband first PMI is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, and the downlink If the frequency-variation characteristic of the channel indicates that the frequency of the downlink channel is not flat, it is determined that the value of the PTI reported in this time is 1; otherwise, the value of the PTI reported in this time is 0.
  • the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, the downlink channel changes slowly, and the downlink If the frequency of the channel is flat, the first PMI of the broadband is not required to be reported. Referring to Figure 1, the value of the PTI reported in this report is 1. Otherwise, the first PMI of the broadband needs to be reported, and the PTI reported this time is determined. The value is 0. It can be seen that the PTI determination mode provided in this embodiment can perform reasonable feedback according to actual conditions, thereby improving feedback control performance.
  • This embodiment does not limit the timing of the four determinations. If it is determined whether the first broadband PMI determined on the current downlink subframe is the same as the bandwidth first PMI that is reported last time, it is determined whether the first PMI of the downlink channel changes during the current PTI reporting period, and finally determines the downlink.
  • the frequency of the channel is as shown in FIG. 8 , and the method includes the following operations:
  • Step 800 Determine a broadband first PMI on a current downlink subframe.
  • Step 810 Determine whether the broadband first PMI determined in the current downlink subframe is the same as the broadband first PMI that was last reported. If yes, go to step 820. Otherwise, go to step 850.
  • Step 820 Determine whether the first PMI of the downlink channel changes during the current PTI reporting period. If not, go to step 850. Otherwise, go to step 830.
  • Step 830 Determine a time-varying characteristic of the downlink channel, that is, determine whether the downlink channel changes rapidly. If the time-varying characteristic of the downlink channel indicates that the downlink channel changes rapidly, perform step 850. If the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, Then step 840 is performed.
  • Step 840 Determine a frequency-varying characteristic of the downlink channel, that is, determine whether the downlink channel is flat. If the frequency-variation characteristic of the downlink channel indicates that the frequency of the downlink channel is flat, step 850 is performed, if the frequency-varying characteristic of the downlink channel indicates the frequency of the downlink channel. If it is not flat, step 860 is performed.
  • Step 850 Determine that the value of the PTI is 0.
  • Step 860 Determine that the value of the PTI is 1.
  • determining whether the broadband first PMI of the downlink channel changes during the current PTI reporting period includes the following operations:
  • Step 1 Obtain a PTI reporting period T 1 .
  • the feedback parameters configured by the base station can be obtained by, but not limited to, the feedback parameters configured by the base station.
  • the feedback parameters configured by the base station For specific implementation, refer to section 7.2 of 3GPP TS36.213-B40.
  • Step 2 Obtain a correlation time T 2 of the broadband first PMI of the downlink channel.
  • the correlation time of a parameter is defined as the time interval at which the value of the parameter guarantees a certain degree of correlation. There is a large correlation between the values of the parameters during the relevant time.
  • step two There are many ways to implement step two.
  • the invention exemplifies several of them:
  • Embodiment A determining a time interval of each adjacent change of the broadband first PMI of the downlink channel in M changes; determining an average of the time intervals as a correlation time of the broadband first PMI of the downlink channel.
  • M is a positive integer greater than 1
  • P m is the time interval between the mth change and the m-1th change in M changes.
  • Embodiment B determining a time interval of each adjacent change of the broadband first PMI of the downlink channel in the M times; determining a smoothed value of the time intervals as a correlation time of the broadband first PMI of the downlink channel. For example, it can be expressed by the following formula:
  • T 2 (m) (1- ⁇ )*T 2 (m-1)+ ⁇ *P m
  • M is a positive integer greater than 1
  • P m is the time interval between the mth change and the m-1th change in M changes
  • is a smoothing factor
  • the value is a real number in the range [0, 1] .
  • Embodiment C acquiring a set of broadband first PMIs of the downlink channel at different time intervals; respectively determining correlations of the broadband first PMIs of the downlink channels at different time intervals; determining a maximum time interval of the correlation greater than the correlation threshold as The correlation time of the broadband first PMI of the downlink channel.
  • the wideband first precoding matrix represented by the wideband first PMI reported at time t (the unit of t may be a subframe) is W(t)
  • the broadband first PMI of the downlink channel with different time interval ⁇ The correlation formula of the correlation R( ⁇ ) is as follows:
  • ⁇ W(t), W(t+ ⁇ )> represents the inner product of the vectors W(t) and W(t+ ⁇ ), and T is a positive integer greater than one.
  • the correlation time of the broadband first PMI of the downlink channel is R( ⁇ ) greater than the maximum ⁇ of the correlation threshold.
  • the correlation threshold value is a real number in the range of [0, 1], and the recommended values are 0.9, 0.95, 0.99, and the like.
  • Step 3 By comparing the correlation time T 2 of the broadband first PMI of the downlink channel with the PTI reporting period T 1 , it is determined whether the first PMI of the downlink channel changes during the current PTI reporting period.
  • T 1 >T 2 it is determined that the broadband first PMI of the downlink channel changes during the current PTI reporting period. Otherwise, it is determined that the broadband first PMI of the downlink channel does not change during the current PTI reporting period.
  • T 1 ⁇ T 2 it is determined that the broadband first PMI of the downlink channel changes during the current PTI reporting period. Otherwise, it is determined that the broadband first PMI of the downlink channel does not change during the current PTI reporting period.
  • the third, fourth, fifth, and sixth implementation manners for determining the downlink channel change situation wherein there are various implementation manners for determining the time-varying characteristics of the downlink channel.
  • the invention exemplifies several of them:
  • Embodiment D determining a Doppler shift of the downlink channel; comparing the Doppler shift to a Doppler shift threshold to determine a time-varying characteristic of the downlink channel.
  • the downlink channel is determined to be fast; otherwise, the downlink channel is determined to be slow.
  • the Doppler shift is not less than (greater than or equal to) the Doppler shift threshold, it is determined that the downlink channel changes rapidly, otherwise, the downlink channel is determined to be slow.
  • the Doppler shift threshold is a real number greater than 0, and the specific value may be set according to actual needs, which is not limited by the present invention.
  • Embodiment E determining a wideband CQI on the current downlink subframe and a CQI on the reference subframe; and using the difference between the absolute value of the CQI on the current downlink subframe and the CQI on the reference subframe and the first CQI threshold The values are compared to determine the time-varying characteristics of the downlink channel.
  • the change of the downlink channel is determined to be fast, otherwise, the change of the downlink channel is determined to be slow.
  • the absolute value of the difference between the CQI on the current downlink subframe and the CQI on the reference subframe is not less than the first CQI difference threshold, and the change of the downlink channel is determined to be fast. Otherwise, the change of the downlink channel is determined to be slow. .
  • the reference subframe is the latest valid downlink subframe that is not less than N before the current downlink subframe and the subframe of the current downlink subframe.
  • the first CQI difference threshold is a positive integer greater than 0, and the specific value may be set according to actual needs, which is not limited by the present invention.
  • Embodiment F obtaining the broadband second PMI and the wideband CQI of the downlink channel, the reporting period T 3 when the PTI is 1; obtaining the correlation time T 4 of the broadband second PMI of the downlink channel; and obtaining the correlation time T 5 of the broadband CQI ; broadband time by correlating the reporting time T 3, respectively, above the downlink channel of the second PMI T 4, wideband CQI correlation time T 5 are compared, it is determined that the downlink channel characteristics change.
  • T 3 >T 4 or T 3 >T 5 it is determined that the change of the downlink channel is fast, otherwise, the change of the downlink channel is determined to be slow.
  • T 3 can be directly obtained through the feedback configuration parameters of the base station, the specific implementation described in section 7.2 of 3GPP TS 36.214-b40 can be referred to, is not repeated here.
  • Embodiment G determining a time interval of each adjacent change of the broadband second PMI of the downlink channel in the M′ time change, where M′ is an integer greater than 1; determining an average value of the time intervals as the bandwidth of the downlink channel The relevant time of the second PMI.
  • Embodiment H determining a time interval of each second change of the broadband second PMI of the downlink channel in the M′ time change, M′ is an integer greater than 1; determining a smoothed value of the time interval as a broadband of the downlink channel The relevant time of the second PMI.
  • Embodiment I determining a time interval of each adjacent change of the wideband CQI of the downlink channel in the M′th change, M′′ is an integer greater than 1; determining an average value of the time intervals as a correlation of the wideband CQI of the downlink channel time.
  • Embodiment J determining a time interval of each adjacent change of the wideband CQI of the downlink channel in the M′th change, M′′ is an integer greater than 1; determining a smoothed value of the time intervals as a correlation of the wideband CQI of the downlink channel time.
  • the fifth and sixth implementation manners for determining the downlink channel change situation wherein there are multiple implementation manners for determining the frequency variation characteristic of the downlink channel, and the present invention exemplifies several of them:
  • the implementation method K determines the multipath delay spread of the downlink channel, and compares the multipath delay spread of the downlink channel with the multipath delay spread threshold to determine the frequency variation characteristic of the downlink channel.
  • the frequency of the downlink channel is determined to be flat.
  • Implementation manner L determining the maximum delay of the downlink channel; determining the frequency variation characteristic of the downlink channel by comparing the maximum delay of the downlink channel with the maximum delay threshold.
  • the frequency of the downlink channel is determined to be flat.
  • Implementation mode Q determining the wideband CQI and the subband CQI of the downlink channel respectively; comparing the absolute value of the difference between the wideband CQI and the subband CQI of the downlink channel and the second CQI difference threshold to determine the frequency variation characteristic of the downlink channel.
  • the frequency of the downlink channel is determined to be flat.
  • the second CQI difference threshold is a positive integer greater than zero.
  • FIG. 9 is a flowchart of another method for determining a value of a precoding type indication according to an embodiment of the present invention, which includes at least the following operations:
  • Step 900 Determine whether the value of the PTI reported in the previous L times is all 1, and L is an integer greater than or equal to 1.
  • step 910 is performed to determine that the value of the PTI reported this time is 0.
  • step 920 is performed to determine that the value of the PTI reported this time is 1.
  • the technical solution provided by the embodiment of the present invention provides a method for determining a PTI, that is, a type of a feedback report reported by a terminal, and is used to control a feedback reporting process.
  • step 900 it can be determined whether the value of the PTI reported in the previous L times is 1 or not, and whether the value of the PTI reported in the previous L consecutive times is 1 or not. Preferably, it is determined whether the value of the PTI reported in the last consecutive L times is 1.
  • the method provided by the embodiment of the present invention may be, but is not limited to, implemented on a terminal.
  • the method provided by the embodiment of the present invention can be applied to, but not only, the LTE system.
  • the embodiment of the present invention further provides a device for determining a value of a precoding type indication. As shown in FIG. 10, the method includes:
  • a channel situation determining module 1001 configured to determine a downlink channel change situation
  • the PTI determining module 1002 is configured to determine the value of the PTI that is reported this time according to the determined downlink channel change.
  • the technical solution provided by the embodiment of the present invention provides an apparatus for determining a PTI, that is, a type of feedback report reported by a terminal, and is used for controlling a feedback reporting process.
  • the channel situation determining module 1001 is configured to:
  • the PTI determining module 1002 is configured to:
  • the broadband first PMI determined on the current downlink subframe is the same as the previously reported broadband first PMI, it is determined that the value of the PTI reported in this time is 1; otherwise, the value of the PTI reported this time is determined. Is 0.
  • the channel situation determining module 1001 is configured to:
  • the PTI determining module 1002 is configured to:
  • the current report is determined.
  • the value of the PTI is 1; otherwise, the value of the PTI reported this time is 0.
  • the channel situation determining module 1001 is configured to:
  • the PTI determining module 1002 is configured to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, determining the PTI of the current report. The value is 1; otherwise, the value of the PTI reported this time is 0.
  • the channel situation determining module 1001 is configured to:
  • the PTI determining module 1002 is configured to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel is The time-varying characteristic indicates that the downlink channel changes slowly, and the value of the PTI reported in this time is determined to be 1; otherwise, the value of the PTI reported in this time is determined to be 0.
  • the channel situation determining module 1001 is configured to:
  • the PTI determining module 1002 is configured to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the time-varying characteristic of the downlink channel indicates that the downlink channel changes slowly, and the frequency of the downlink channel changes. If the characteristic indicates that the frequency of the downlink channel is not flat, it is determined that the value of the PTI reported in this time is 1; otherwise, the value of the PTI reported in this time is 0.
  • the channel situation determining module 1001 is configured to:
  • Determining a broadband first PMI on the current downlink subframe and determining the broadband first PMI determined in the current downlink subframe Whether the broadband first PMI of the downlink channel is changed in the current PTI period, determining the time-varying characteristic of the downlink channel, and determining the frequency-varying characteristic of the downlink channel;
  • the PTI determining module 1002 is configured to:
  • the broadband first PMI determined in the current downlink subframe is the same as the previously reported broadband first PMI, and the broadband first PMI of the downlink channel does not change during the current PTI reporting period, and the downlink channel is
  • the time-varying characteristic indicates that the downlink channel changes slowly, and the frequency-variation characteristic of the downlink channel indicates that the frequency of the downlink channel is not flat, and the value of the PTI that is reported this time is determined to be 1; otherwise, the current report is determined.
  • the value of PTI is 0.
  • the channel situation determining module 1001 is configured to: determine whether the broadband first PMI of the downlink channel changes during the current PTI reporting period, where the channel situation determining module 1001 is configured to:
  • the comparison between the correlation time of the broadband first PMI of the downlink channel and the PTI reporting period determines whether the first PMI of the downlink channel changes during the current PTI reporting period.
  • the channel situation determining module 1001 when acquiring the correlation time of the broadband first PMI of the downlink channel, is configured to:
  • the maximum time interval in which the correlation is greater than the correlation threshold is determined as the correlation time of the broadband first PMI of the downlink channel.
  • the channel situation determining module 1001 when determining the time-varying characteristic of the downlink channel, is configured to:
  • Determining a Doppler shift of the downlink channel determining a time-varying characteristic of the downlink channel by comparing the Doppler shift to a Doppler shift threshold; or
  • the channel situation determining module 1001 when acquiring the correlation time of the broadband second PMI of the downlink channel, is configured to:
  • the channel situation determining module 1001 is configured to: when acquiring a correlation time of the broadband CQI:
  • the channel situation determining module 1001 when determining the frequency variation characteristic of the downlink channel, is configured to:
  • Determining a multipath delay spread of the downlink channel comparing the multipath delay spread of the downlink channel with a multipath delay spread threshold to determine a frequency change characteristic of the downlink channel; or
  • Determining a maximum delay of the downlink channel Determining a maximum delay of the downlink channel; determining a frequency variation characteristic of the downlink channel by comparing the maximum delay of the downlink channel with a maximum delay threshold; or
  • the embodiment of the present invention further provides a terminal, as shown in FIG.
  • the processor 1100 is configured to read a program in the memory 1120 and perform the following process:
  • the transceiver 1110 is configured to receive and send data under the control of the processor 1100.
  • the memory 1120 is configured to save data used by the processor 1100 when performing an operation.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1100 and various circuits of memory represented by memory 1120.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 1110 It can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 1130 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 in performing operations.
  • the terminal provided by the embodiment of the present invention can determine the PTI, that is, the type of the feedback report reported by the terminal, and is used to control the feedback reporting process.
  • the embodiment of the present invention further provides a device for determining a value of a precoding type indication. As shown in FIG. 12, the method includes:
  • the PTI history value judging module 1201 is configured to determine whether the value of the precoding type indicated by the previous L times is P1, and L is an integer greater than or equal to 1;
  • the PTI determining module 1202 is configured to: when the judgment result of the PTI history value judging module is yes, determine that the value of the PTI that is reported this time is 0; and the judgment result of the PTI historical value judging module is no. The value of the PTI reported in this report is 1.
  • the embodiment of the present invention further provides a terminal, including:
  • a processor for reading a program in the memory performing the following process:
  • Determining whether the precoding type reported in the previous L times indicates whether the value of the PTI is 1 or not, and L is an integer greater than or equal to 1;
  • transceiver for receiving and transmitting data under the control of a processor
  • a memory that holds the data that the processor uses when performing operations.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a particular computer capable of booting a computer or other programmable data processing device In a computer readable memory that operates in a computer readable memory, causing instructions stored in the computer readable memory to produce an article of manufacture comprising instruction means implemented in a block or in a flow or a flow diagram and/or block diagram of the flowchart The functions specified in the boxes.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

公开了一种预编码类型指示的取值确定方法及装置。确定下行信道变化情况;根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值。本发明实施例提供的技术方案,提供了确定PTI,即终端上报的反馈报告类型的实现方法及装置,从而用于控制反馈上报过程。

Description

一种预编码类型指示的取值确定方法及装置
本申请要求在2015年03月13日提交中国专利局、申请号为201510112759.3、发明名称为“一种预编码类型指示的取值确定方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域,尤其涉及一种预编码类型指示的取值确定方法及装置。
背景技术
空间复用是无线通信系统中普遍采用的多天线传输方式。例如,长期演进(Long Term Evolution,LTE)系统物理下行共享信道(Physical Downlink Shared Channel,PDSCH)的传输模式4、传输模式9与传输模式10都属于空间复用的多天线传输方式。
为了提高传输性能,接收机可以反馈当前的信道状态信息到发送端。例如,为了提升LTE系统PDSCH的传输性能,终端一般会向基站反馈信道状态信息(CSI,Channel State Information),包括:信道质量指示(Channel Quality Indicator,CQI)、预编码矩阵指示(Precoding Matrix Indicator,PMI)与秩指示RI(rank indication,RI)。其中,CQI表征信道的质量信息,以推荐的调制编码方式来表征信道质量,越高阶的调制编码方式表示性能越好;PMI表征信道的特征矢量信息即预编码矩阵;RI表示信道能支持的空间复用的层数。
LTE系统中CSI反馈包括周期反馈与非周期反馈。其中周期反馈主要承载在物理上行控制信道(Physical Uplink Control Channel,PUCCH)上;而非周期反馈承载在物理上行共享信道(Physical Uplink Shared Channel,PUSCH)上。
LTE系统中PUCCH周期反馈分为四种反馈类型,如下表1所示:
表1 PUCCH上报模式的CQI与PMI反馈类型
Figure PCTCN2015097953-appb-000001
其中模式(Mode)2-1需要反馈宽带PMI与宽带CQI,另外还需要在两个宽带CQI 上报间隔中依次反馈每个带宽部分(Band Part,BP)所选择的子带标识与子带CQI。
LTE系统在R10及更高版本的标准中支持8天线的下行多天线传输方式。针对终端反馈过程,8天线传输方式中,定义了第一PMI与第二PMI两个PMI来指示预编码矩阵信息,其中第一PMI表示宽带或者长时信道的属性,第二PMI表示确定频带上或者短时信道的属性。增强型长期演进(LTE-A)系统中,由于出现了中第一PMI和第二PMI的反馈,考虑到开销限制,引入了1bit的预编码类型指示(PTI,Precoding Type Indicator),用于向基站通知终端上报的反馈报告的类型。针对表1中的模式2-1,8天线传输方式中,如图1所示,当PTI=0时,对应第一反馈报告类型,即上报第一PMI(W1)和宽带CQI,以及宽带第二PMI(W2);当PTI=1时,对应第二反馈报告类型,即上报宽带CQI,宽带第二PMI(W2)和子带CQI,以及子带第二PMI(W2)。
目前,LTE标准中规定了终端在PTI取值已知时CSI反馈报告的上报过程,但并未给出PTI取值的具体确定方法,即目前还没有解决方案来确定终端上报的反馈报告类型。
发明内容
本发明的目的是提供一种PTI的取值确定方法及装置,以解决如何确定PTI取值的问题。
本发明的目的是通过以下技术方案实现的:
一种预编码类型指示的取值确定方法,包括:
确定下行信道变化情况;
根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值。
确定下行信道变化情况的第一种实现方式如下:
在当前下行子帧上确定宽带第一预编码矩阵指示PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
相应的,根据确定的所述下行信道变化情况,确定本次上报的PTI的取值的第一种实现方式如下:
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
确定下行信道变化情况的第二种实现方式如下:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
相应的,根据确定的所述下行信道变化情况,确定本次上报的PTI的取值的第二种实 现方式如下:
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
其中,所述在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,包括:
在当前下行子帧上确定宽带第一PMI;
判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
确定下行信道变化情况的第三种实现方式如下:
在当前下行子帧确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性;
相应的,根据确定的所述下行信道变化情况,确定本次上报的PTI的取值的第三种实现方式如下:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
其中,所述在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性,包括:
在当前下行子帧确定宽带第一PMI;
判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的时变特性。
确定下行信道变化情况的第四种实现方式如下:
在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性;
相应的,根据确定的所述下行信道变化情况,确定本次上报的PTI的取值的第四种实现方式如下:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
其中,所述在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性,包括:
在当前下行子帧确定宽带第一PMI;
判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
如果下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则判断下行信道的时变特性。
确定下行信道变化情况的第五种实现方式如下:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性;
相应的,根据确定的所述下行信道变化情况,确定本次上报的PTI的取值的第五种实现方式如下:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
其中,所述在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性,包括:
在当前下行子帧上确定宽带第一PMI;
判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的时变特性;
如果所述下行信道的时变特性指示所述下行信道变化慢,则判断下行信道的频变特 性。
确定下行信道变化情况的第六种实现方式如下:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性;
相应的,根据确定的所述下行信道变化情况,确定本次上报的PTI的取值的第六种实现方式如下:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
其中,所述在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性,包括:
在当前下行子帧上确定宽带第一PMI;
判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
如果下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则判断下行信道的时变特性;
如果所述下行信道的时变特性指示所述下行信道变化慢,则判断下行信道的频变特性。
基于确定下行信道变化情况的上述第二、第四、第六种实现方式,所述判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化,包括:
获取PTI上报周期;
获取下行信道的宽带第一PMI的相关时间;
通过比较下行信道的宽带第一PMI的所述相关时间与所述PTI上报周期,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
其中,所述获取下行信道的宽带第一PMI的相关时间,包括:
确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第一PMI的所述相关时间; 或者,
确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第一PMI的所述相关时间;或者,
以不同时间间隔获取下行信道的一组宽带第一PMI;
分别确定下行信道不同时间间隔的宽带第一PMI的相关度;
将相关度大于相关度门限值的最大时间间隔确定为下行信道的宽带第一PMI的所述相关时间。
基于确定下行信道变化情况的第三、第四、第五、第六种实现方式,所述判断下行信道的时变特性,包括:
确定下行信道的多普勒频移;通过将所述多普勒频移与多普勒频移门限值进行比较,判断下行信道的时变特性;或者,
确定当前下行子帧上的宽带信道质量指示CQI和参考子帧上的CQI,所述参考子帧为当前下行子帧之前,与当前下行子帧的子帧间隔不小于N的最晚有效下行子帧;通过将当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值与第一CQI差值门限值进行比较,判断下行信道的时变特性;或者,
获取下行信道的宽带第二PMI/宽带CQI在PTI取值为1时的上报周期;获取下行信道的宽带第二PMI的相关时间;获取宽带CQI的相关时间;通过将所述上报时间分别与下行信道的宽带第二PMI的相关时间、宽带CQI的相关时间进行比较,判断下行信道的时变特性。
本发明实施例中,宽带第二PMI和宽带CQI也可以表示为宽带第二PMI/宽带CQI,是指,同时上报的宽带第二PMI和宽带CQI。
其中,所述获取下行信道的宽带第二PMI的相关时间,包括:
确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第二PMI的所述相关时间;或者,
确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第二PMI的所述相关时间。
其中,所述获取宽带CQI的相关时间,包括:
确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带CQI的所述相关时间;或者,
确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大 于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带CQI的所述相关时间。
基于确定下行信道变化情况的第五、第六种实现方式,其中,所述判断下行信道的频变特性,包括:
确定下行信道的多径时延扩展;通过将下行信道的所述多径时延扩展与多径时延扩展门限值进行比较,判断下行信道的频变特性;或者,
确定下行信道的最大时延;通过将下行信道的所述最大时延与最大时延门限值进行比较,判断下行信道的频变特性;或者,
分别确定下行信道的宽带CQI和子带CQI;通过将下行信道的所述宽带CQI和子带CQI的差值绝对值与第二CQI差值门限值进行比较,判断下行信道的频变特性。
一种预编码类型指示的取值确定方法,包括:
判断之前L次上报的预编码类型指示PTI的取值是否均为1,L为大于等于1的整数;
如果是,则确定本次上报的PTI的取值为0;
否则,确定本次上报的PTI的取值为1。
基于与方法同样的发明构思,本发明实施例还提供一种预编码类型指示的取值确定装置,包括:
信道情况确定模块,用于确定下行信道变化情况;
PTI确定模块,用于根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值。
一种实现方式中,所述信道情况确定模块用于:
在当前下行子帧上确定宽带第一预编码矩阵指示PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
所述PTI确定模块用于:
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
所述PTI确定模块用于:
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块用于:
在当前下行子帧确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性;
所述PTI确定模块用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块用于:
在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性;
所述PTI确定模块用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性;
所述PTI确定模块用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性;
所述PTI确定模块用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
其中,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化时,所述信道情况确定模块用于:
获取PTI上报周期;
获取下行信道的宽带第一PMI的相关时间;
通过比较下行信道的宽带第一PMI的所述相关时间与所述PTI上报周期,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
其中,获取下行信道的宽带第一PMI的相关时间时,所述信道情况确定模块用于:
确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第一PMI的所述相关时间;或者,
确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第一PMI的所述相关时间;或者,
以不同时间间隔获取下行信道的一组宽带第一PMI;
分别确定下行信道不同时间间隔的宽带第一PMI的相关度;
将相关度大于相关度门限值的最大时间间隔确定为下行信道的宽带第一PMI的所述相关时间。
其中,判断下行信道的时变特性时,所述信道情况确定模块用于:
确定下行信道的多普勒频移;通过将所述多普勒频移与多普勒频移门限值进行比较,判断下行信道的时变特性;或者,
确定当前下行子帧上的宽带信道质量指示CQI和参考子帧上的CQI,所述参考子帧为当前下行子帧之前,与当前下行子帧的子帧间隔不小于N的最晚有效下行子帧;通过将当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值与第一CQI差值门限值进行比较,判断下行信道的时变特性;或者,
获取下行信道的宽带第二PMI和宽带CQI在PTI取值为1时的上报周期;获取下行信道的宽带第二PMI的相关时间;获取宽带CQI的相关时间;通过将所述上报时间分别与下行信道的宽带第二PMI的相关时间、宽带CQI的相关时间进行比较,判断下行信道的时变特性。
其中,获取下行信道的宽带第二PMI的相关时间时,所述信道情况确定模块用于:
确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第二PMI的所述相关时间;或者,
确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’ 为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第二PMI的所述相关时间。
其中,获取宽带CQI的相关时间时,所述信道情况确定模块用于:
确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带CQI的所述相关时间;或者,
确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带CQI的所述相关时间。
其中,判断下行信道的频变特性时,所述信道情况确定模块用于:
确定下行信道的多径时延扩展;通过将下行信道的所述多径时延扩展与多径时延扩展门限值进行比较,判断下行信道的频变特性;或者,
确定下行信道的最大时延;通过将下行信道的所述最大时延与最大时延门限值进行比较,判断下行信道的频变特性;或者,
分别确定下行信道的宽带CQI和子带CQI;通过将下行信道的所述宽带CQI和子带CQI的差值绝对值与第二CQI差值门限值进行比较,判断下行信道的频变特性。
基于与方法同样的发明构思,本发明实施例还提供一种终端,包括:
处理器,用于读取存储器中的程序,执行下列过程:
确定下行信道变化情况;
根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值,所述PTI的取值指示了所述下行信道对应的信道状态反馈报告的类型;
收发机,用于在处理器的控制下接收和发送数据;
存储器,用于保存处理器在执行操作时所使用的数据。
一种预编码类型指示的取值确定装置,包括:
处理器,用于读取存储器中的程序,执行下列过程:
确定下行信道变化情况;
根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值,所述PTI的取值指示了所述下行信道对应的信道状态反馈报告的类型;
收发机,用于在处理器的控制下接收和发送数据;
存储器,用于保存处理器在执行操作时所使用的数据。
一种实现方式中,所述处理器用于:
在当前下行子帧上确定宽带第一预编码矩阵指示PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
所述处理器还用于:
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同, 则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述处理器用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
所述处理器还用于:
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述处理器用于:
在当前下行子帧确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性;
所述处理器还用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述处理器用于:
在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性;
所述处理器还用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述处理器用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性;
所述处理器还用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI 的取值为0。
一种实现方式中,所述处理器用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性;
所述处理器还用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化时,所述处理器用于:
获取PTI上报周期;
获取下行信道的宽带第一PMI的相关时间;
通过比较下行信道的宽带第一PMI的所述相关时间与所述PTI上报周期,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
一种实现方式中,获取下行信道的宽带第一PMI的相关时间时,所述处理器用于:
确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第一PMI的所述相关时间;或者,
确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第一PMI的所述相关时间;或者,
以不同时间间隔获取下行信道的一组宽带第一PMI;
分别确定下行信道不同时间间隔的宽带第一PMI的相关度;
将相关度大于相关度门限值的最大时间间隔确定为下行信道的宽带第一PMI的所述相关时间。
一种实现方式中,判断下行信道的时变特性时,所述处理器用于:
确定下行信道的多普勒频移;通过将所述多普勒频移与多普勒频移门限值进行比较,判断下行信道的时变特性;或者,
确定当前下行子帧上的宽带信道质量指示CQI和参考子帧上的CQI,所述参考子帧为当前下行子帧之前,与当前下行子帧的子帧间隔不小于N的最晚有效下行子帧;通过将当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值与第一CQI差值门限值进行比较, 判断下行信道的时变特性;或者,
获取下行信道的宽带第二PMI和宽带CQI在PTI取值为1时的上报周期;获取下行信道的宽带第二PMI的相关时间;获取宽带CQI的相关时间;通过将所述上报时间分别与下行信道的宽带第二PMI的相关时间、宽带CQI的相关时间进行比较,判断下行信道的时变特性。
一种实现方式中,获取下行信道的宽带第二PMI的相关时间时,所述处理器用于:
确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第二PMI的所述相关时间;或者,
确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第二PMI的所述相关时间。
一种实现方式中,获取宽带CQI的相关时间时,所述处理器用于:
确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带CQI的所述相关时间;或者,
确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带CQI的所述相关时间。
一种实现方式中,判断下行信道的频变特性时,所述处理器用于:
确定下行信道的多径时延扩展;通过将下行信道的所述多径时延扩展与多径时延扩展门限值进行比较,判断下行信道的频变特性;或者,
确定下行信道的最大时延;通过将下行信道的所述最大时延与最大时延门限值进行比较,判断下行信道的频变特性;或者,
分别确定下行信道的宽带CQI和子带CQI;通过将下行信道的所述宽带CQI和子带CQI的差值绝对值与第二CQI差值门限值进行比较,判断下行信道的频变特性。
基于与方法同样的发明构思,本发明实施例还提供一种预编码类型指示的取值确定装置,包括:
PTI历史取值判断模块,用于判断之前L次上报的预编码类型指示PTI的取值是否均为1;
PTI确定模块,用于在所述PTI历史取值判断模块的判断结果为是时,确定本次上报的PTI的取值为0;在所述PTI历史取值判断模块的判断结果为否时,确定本次上报的PTI的取值为1。
基于与方法同样的发明构思,本发明实施例还提供一种终端,包括:
处理器,用于读取存储器中的程序,执行下列过程:
判断之前L次上报的预编码类型指示PTI的取值是否均为1,L为大于等于1的整数;
如果是,则确定本次上报的PTI的取值为0;否则,确定本次上报的PTI的取值为1;
收发机,用于在处理器的控制下接收和发送数据;
存储器,用于保存处理器在执行操作时所使用的数据。
本发明实施例提供的技术方案,提供了确定PTI,即终端上报的反馈报告类型的实现方法及装置,从而用于控制反馈上报过程。
附图说明
图1为PUCCH上报模式2-1在8天线端口时的上报示意图;
图2为本发明实施例提供的第一个方法流程图;
图3为本发明实施例提供的第二个方法流程图;
图4为本发明实施例提供的第三个方法流程图;
图5为本发明实施例提供的第四个方法流程图;
图6为本发明实施例提供的第五个方法流程图;
图7为本发明实施例提供的第六个方法流程图;
图8为本发明实施例提供的第七个方法流程图;
图9为本发明实施例提供的第八个方法流程图;
图10为本发明实施例提供的一种装置示意图;
图11为本发明实施例提供的终端结构示意图;
图12为本发明实施例提供的另一种装置示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
应理解,本发明的技术方案可以应用于各种通信系统,例如:全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、先进的长期演进(Advanced long term evolution,LTE-A)系统、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)等。
还应理解,在本发明实施例中,用户设备(UE,User Equipment)包括但不限于移动台(MS,Mobile Station)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、手机(handset)及便携设备(portable equipment)等,该用户设备可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网进行通信,例如,用户设备可以是移动电话(或称为“蜂窝”电话)、具有无线通信功能的计算机等,用户设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
在本发明实施例中,基站(例如,接入点)可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换,作为无线终端与接入网的其余部分之间的路由器,其中接入网的其余部分可包括网际协议(IP)网络。基站还可协调对空中接口的属性管理。例如,基站可以是GSM或CDMA中的基站(Base Transceiver Station,BTS),也可以是WCDMA中的基站(NodeB),还可以是LTE中的演进型基站(NodeB或eNB或e-NodeB,evolutional Node B),本发明并不限定。
下面将结合附图,对本发明实施例提供的技术方案进行详细说明。
图2所示为本发明实施例提供的一种预编码类型指示的取值确定方法的流程图,其至少包括如下操作:
步骤200、确定下行信道变化情况。
步骤210、根据确定的上述下行信道变化情况,确定本次上报的PTI的取值。
其中,步骤200和步骤210既可以在需要上报PTI时执行,也可以在上一次上报PTI之后,本次需要上报PTI之前执行。
本发明实施例提供的技术方案,提供了确定PTI,即终端上报的反馈报告类型的实现方法,从而用于控制反馈上报过程。
其中,步骤200中确定的下行信道变化情况至少包括以下部分或全部情况:
下行信道的宽带第一PMI是否发生变化,下行信道的宽带第一PMI是否会发生变化,下行信道的时变特性,下行信道的频变特性。
本发明实施例中,时变特性是指下行信道的变化快慢的特性;频变特性是指下行信道的频率平坦与否的特性。
基于上述部分或全部下行信道变化情况,对本发明的具体实现方式说明如下。
步骤200的第一种实现方式:如图3所示,步骤300、在当前下行子帧上确定宽带第一PMI,步骤310判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同;相应的,步骤210的第一种实现方式:如果在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI相同,则执行步骤320、确定本次上报的PTI的取值为1;否则,执行步骤330、确定本次上报的PTI的取值为0。
如果在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI相同,则本次不需要上报宽带第一PMI,参照图1,确定本次上报的PTI的取值为1,否则,本次需要上报宽带第一PMI,确定本次上报的PTI的取值为0。可见,本实施例提供的PTI确定方式能够根据实际情况进行合理的反馈,从而提高反馈控制性能。
其中,当前下行子帧可以是上一次上报PTI至本次上报PTI之间的任意一个下行子帧。可以按照预先的约定或配置,在其中任意一个。
优选的,在距离本次上报PTI最近的下行子帧上执行本发明实施例的方法流程。
步骤200的第二种实现方式:在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;相应的,步骤210的第二种实现方式如下:如果在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
如果在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则本次不需要上报宽带第一PMI,参照图1,确定本次上报的PTI的取值为1,否则,本次需要上报宽带第一PMI,确定本次上报的PTI的取值为0。可见,本实施例提供的PTI确定方式能够根据实际情况进行合理的反馈,从而提高反馈控制性能。
本实施例中,不对两次判断的时序进行限定。既可以先判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,也可以先判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
如果先判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,本发明实施例提供的方法流程如图4所示,具体包括如下操作:
步骤400、在当前下行子帧上确定宽带第一PMI。
步骤410、判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,如果相同,则执行步骤420,否则,执行步骤430。
步骤420、判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化,如果会,则执行步骤430,否则,执行步骤440。
步骤430、确定PTI的取值为0。
步骤440、确定PTI的取值为1。
步骤200的第三种实现方式:在当前下行子帧确定宽带第一PMI,判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性;相应的,步骤210的第三种实现方式:如果在当前下行子帧确定的宽带第一PMI 与上一次上报的宽带第一PMI相同,且下行信道的时变特性指示下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
如果在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道变化慢,则本次不需要上报宽带第一PMI,参照图1,确定本次上报的PTI的取值为1,否则,本次需要上报宽带第一PMI,确定本次上报的PTI的取值为0。可见,本实施例提供的PTI确定方式能够根据实际情况进行合理的反馈,从而提高反馈控制性能。
本实施例中,不对两次判断的时序进行限定。既可以先判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,也可以先判断下行信道的时变特性。
如果先判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,本发明实施例提供的方法流程如图5所示,具体包括如下操作:
步骤500、在当前下行子帧确定宽带第一PMI。
步骤510、判断在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,如果相同,则执行步骤520,否则,执行步骤530。
步骤520、判断下行信道的时变特性,即判断下行信道是否变化快,如果下行信道的时变特性指示下行信道变化快,则执行步骤530,如果下行信道的时变特性指示下行信道变化慢,则执行步骤540。
步骤530、确定PTI的取值为0。
步骤540、确定PTI的取值为1。
步骤200的第四种实现方式:在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性;相应的,步骤210的第四种实现方式:如果在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
如果在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且下行信道变化慢,则本次不需要上报宽带第一PMI,参照图1,确定本次上报的PTI的取值为1,否则,本次需要上报宽带第一PMI,确定本次上报的PTI的取值为0。可见,本实施例提供的PTI确定方式能够根据实际情况进行合理的反馈,从而提高反馈控制性能。
本实施例中,不对三次判断的时序进行限定。如果先判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,最后判断下行信道的时变特性,本 发明实施例提供的方法流程如图6所示,具体包括如下操作:
步骤600、在当前下行子帧确定宽带第一PMI。
步骤610、判断在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,如果相同,则执行步骤620,否则,执行步骤640。
步骤620、判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化,如果会,则执行步骤640,否则,执行步骤630。
步骤630、判断下行信道的时变特性,即判断下行信道是否变化快,如果下行信道的时变特性指示下行信道变化快,则执行步骤640,如果下行信道的时变特性指示下行信道变化慢,则执行步骤650。
步骤640、确定PTI的取值为0。
步骤650、确定PTI的取值为1。
步骤200的第五种实现方式:在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性;相应的,步骤210的第五种实现方式如下:如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的时变特性指示所述下行信道变化慢,且下行信道的频变特性指示下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
如果在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道变化慢,且下行信道的频率平坦,则本次不需要上报宽带第一PMI,参照图1,确定本次上报的PTI的取值为1,否则,本次需要上报宽带第一PMI,确定本次上报的PTI的取值为0。可见,本实施例提供的PTI确定方式能够根据实际情况进行合理的反馈,从而提高反馈控制性能。
本实施例不对三次判断的时序进行限定。如果先判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,最后判断下行信道的频变特性,本发明实施例提供的方法流程如图7所示,具体包括如下操作:
步骤700、在当前下行子帧上确定宽带第一PMI。
步骤710、判断在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,如果相同,则执行步骤720,否则,执行步骤740。
步骤720、判断下行信道的时变特性,即判断下行信道是否变化快,如果下行信道的时变特性指示下行信道变化快,则执行步骤740,如果下行信道的时变特性指示下行信道变化慢,则执行步骤730。
步骤730、判断下行信道的频变特性,即判断下行信道是否频率平坦,如果下行信道的频变特性指示下行信道的频率平坦,则执行步骤740,如果下行信道的频变特性指示下 行信道的频率不平坦,则执行步骤750。
步骤740、确定PTI的取值为0。
步骤750、确定PTI的取值为1。
步骤200的第六种实现方式:在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性;相应的,步骤210的第六种实现方式如下:如果在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且下行信道的时变特性指示下行信道变化慢,且下行信道的频变特性指示下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
如果在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,下行信道变化慢,且下行信道的频率平坦,则本次不需要上报宽带第一PMI,参照图1,确定本次上报的PTI的取值为1,否则,本次需要上报宽带第一PMI,确定本次上报的PTI的取值为0。可见,本实施例提供的PTI确定方式能够根据实际情况进行合理的反馈,从而提高反馈控制性能。
本实施例不对四次判断的时序进行限定。如果先判断在当前下行子帧上确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,再判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化,最后判断下行信道的频变特性,本发明实施例提供的方法流程如图8所示,具体包括如下操作:
步骤800、在当前下行子帧上确定宽带第一PMI。
步骤810、判断在当前下行子帧确定的宽带第一PMI与上一次上报的宽带第一PMI是否相同,如果相同,则执行步骤820,否则,执行步骤850。
步骤820、判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化,如果不变,则执行步骤850,否则,执行步骤830。
步骤830、判断下行信道的时变特性,即判断下行信道是否变化快,如果下行信道的时变特性指示下行信道变化快,则执行步骤850,如果下行信道的时变特性指示下行信道变化慢,则执行步骤840。
步骤840、判断下行信道的频变特性,即判断下行信道是否频率平坦,如果下行信道的频变特性指示下行信道的频率平坦,则执行步骤850,如果下行信道的频变特性指示下行信道的频率不平坦,则执行步骤860。
步骤850、确定PTI的取值为0。
步骤860、确定PTI的取值为1。
基于确定下行信道变化情况的上述第二、第四、第六种实现方式,其中,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化,具体包括如下操作:
步骤一、获取PTI上报周期T1
可以但不仅限于通过基站配置的反馈参数直接获取,具体实现方式可以参照3GPP TS36.213-B40的7.2节描述。
步骤二、获取下行信道的宽带第一PMI的相关时间T2
某参数的相关时间定义为该参数的取值保证一定相关度的时间间隔。在相关时间内,参数的取值之间具有很大的相关度。
步骤二的实现方式有多种。本发明例举其中几种:
实现方式A、确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔;将这些时间间隔的平均值确定为下行信道的宽带第一PMI的相关时间。即:
Figure PCTCN2015097953-appb-000002
其中,M为大于1的正整数,Pm为M次变化中的第m次变化与第m-1次变化的时间间隔。
其中,M的具体取值根据实际需要确定,本发明不作限定。
实现方式B、确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔;将这些时间间隔的平滑值确定为下行信道的宽带第一PMI的相关时间。例如可以通过如下公式表示:
T2(m)=(1-α)*T2(m-1)+α*Pm
T2(0)=0
T2=T2(M)
其中,M为大于1的正整数,Pm为M次变化中的第m次变化与第m-1次变化的时间间隔,α为平滑因子,取值为[0,1]范围内的实数。
其中,M的具体取值根据实际需要确定,本发明不作限定。
实现方式C、以不同时间间隔获取下行信道的一组宽带第一PMI;分别确定下行信道不同时间间隔的宽带第一PMI的相关度;将相关度大于相关度门限值的最大时间间隔确定为下行信道的宽带第一PMI的相关时间。
具体的,假设t时刻(t的单位可以是子帧)上报的宽带第一PMI所表示的宽带第一预编码矩阵为W(t),那么,下行信道不同时间间隔τ的宽带第一PMI的相关度R(τ)的计算公式如下:
Figure PCTCN2015097953-appb-000003
其中,<W(t),W(t+τ)>表示向量W(t)与W(t+τ)的内积,T为大于1的正整数。
下行信道的宽带第一PMI的相关时间为R(τ)大于相关度门限值的最大τ。
本发明实施例中,相关度门限值的取值为[0,1]范围内的实数,推荐取值为0.9,0.95,0.99等。
步骤三、通过比较下行信道的宽带第一PMI的相关时间T2与PTI上报周期T1,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
具体的,当T1>T2,判断下行信道的宽带第一PMI在当前PTI上报周期内会发生变化,否则,判断下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化。当然,也可以是在T1≥T2,判断下行信道的宽带第一PMI在当前PTI上报周期内会发生变化,否则,判断下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化。
基于确定下行信道变化情况的第三、第四、第五、第六种实现方式,其中,判断下行信道的时变特性的实现方式有多种。本发明例举其中几种:
实现方式D、确定下行信道的多普勒频移;通过将该多普勒频移与多普勒频移门限值进行比较,判断下行信道的时变特性。
具体的,如果多普勒频移大于大于多普勒频移门限值,判定下行信道变化快;否则,判定下行信道变化慢。当然,也可以在多普勒频移不小于(大于或等于)多普勒频移门限值时,判定下行信道变化快,否则,判定下行信道变化慢。
其中,多普勒频移门限值为大于0的实数,其具体取值可以根据实际需要设定,本发明对此不作限定。
实现方式E、确定当前下行子帧上的宽带CQI和参考子帧上的CQI;通过将当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值与第一CQI差值门限值进行比较,判断下行信道的时变特性。
具体的,如果当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值大于第一CQI差值门限值,判定下行信道的变化快,否则,判定下行信道的变化慢。当然,也可以是当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值不小于第一CQI差值门限值,判定下行信道的变化快,否则,判定下行信道的变化慢。
其中,参考子帧为当前下行子帧之前,与当前下行子帧的子帧间隔不小于N的最晚有效下行子帧。
其中,有效下行子帧的定义请参见3GPP TS 36 213-b10的7.2节描述,此处不再赘述。
其中,第一CQI差值门限值为大于0的正整数,其具体取值可以根据实际需要设定,本发明对此不作限定。
实现方式F、获取下行信道的宽带第二PMI和宽带CQI在PTI取值为1时的上报周期T3;获取下行信道的宽带第二PMI的相关时间T4;获取宽带CQI的相关时间T5;通过将 上述上报时间T3分别与下行信道的宽带第二PMI的相关时间T4、宽带CQI的相关时间T5进行比较,判断下行信道的时变特性。
具体的,如果T3>T4,或者T3>T5,判定下行信道的变化快,否则,判定下行信道的变化慢。
其中,可以通过基站配置的反馈参数直接获取T3,具体实现方式可以参照3GPP TS 36.214-b40的7.2节的描述,此处不再赘述。
其中,获取下行信道的宽带第二PMI的相关时间的实现方式有多种,下面例举其中几种:
实现方式G、确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,M’为大于1的整数;将这些时间间隔的平均值确定为下行信道的宽带第二PMI的相关时间。
其具体实现方式可以参照上述实现方式A,此处不再赘述。
实现方式H、确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,M’为大于1的整数;将这些时间间隔的平滑值确定为下行信道的宽带第二PMI的相关时间。
其具体实现方式可以参照上述实现方式B,此处不再赘述。
其中,获取宽带CQI的相关时间的实现方式有多种,下面例举其中几种:
实现方式I、确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,M”为大于1的整数;将这些时间间隔的平均值确定为下行信道的宽带CQI的相关时间。
其具体实现方式可以参照上述实现方式A,此处不再赘述。
实现方式J、确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,M”为大于1的整数;将这些时间间隔的平滑值确定为下行信道的宽带CQI的相关时间。
其具体实现方式可以参照上述实现方式B,此处不再赘述。
基于确定下行信道变化情况的第五、第六种实现方式,其中,判断下行信道的频变特性的实现方式有多种,本发明例举其中几种:
实现方式K、确定下行信道的多径时延扩展;通过将下行信道的多径时延扩展与多径时延扩展门限值进行比较,判断下行信道的频变特性。
具体的,如果下行信道的多径时延扩展大于多径时延扩展门限值,判定下行信道的频率不平坦,否则,判定下行信道的频率平坦。
实现方式L:确定下行信道的最大时延;通过将下行信道的最大时延与最大时延门限值进行比较,判断下行信道的频变特性。
具体的,如果下行信道的最大时延大于最大时延门限值,判定下行信道的频率不平坦,否则,判定下行信道的频率平坦。
实现方式Q:分别确定下行信道的宽带CQI和子带CQI;通过将下行信道的宽带CQI和子带CQI的差值绝对值与第二CQI差值门限值进行比较,判断下行信道的频变特性。
具体的,在满足如下公式时,判定下行信道的频率不平坦,否则,判定下行信道的频率平坦。
Figure PCTCN2015097953-appb-000004
其中,第二CQI差值门限值为大于0的正整数。
图9所示为本发明实施例提供的另一种预编码类型指示的取值确定方法的流程图,其至少包括如下操作:
步骤900、判断之前L次上报的PTI的取值是否均为1,L为大于等于1的整数。
如果是,则执行步骤910、确定本次上报的PTI的取值为0。
否则,执行步骤920、确定本次上报的PTI的取值为1。
本发明实施例提供的技术方案,提供了确定PTI,即终端上报的反馈报告类型的实现方法,从而用于控制反馈上报过程。
步骤900中,具体可以判断之前连续L次上报的PTI的取值是否均为1,也可以判断之前不连续的L次上报的PTI的取值是否均为1。优选的,判断最近连续L次上报的PTI的取值是否为1。
本发明实施例提供的方法可以但不仅限于在终端上实现。
本发明实施例提供的方法可以但不仅适用于LTE系统。
基于与方法同样的发明构思,本发明实施例还提供一种预编码类型指示的取值确定装置,如图10所示,包括:
信道情况确定模块1001,用于确定下行信道变化情况;
PTI确定模块1002,用于根据确定的所述下行信道变化情况,确定本次上报的PTI的取值。
本发明实施例提供的技术方案,提供了确定PTI,即终端上报的反馈报告类型的实现装置,从而用于控制反馈上报过程。
一种实现方式中,所述信道情况确定模块1001用于:
在当前下行子帧上确定宽带第一预编码矩阵指示PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
所述PTI确定模块1002用于:
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块1001用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一 PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
所述PTI确定模块1002用于:
如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块1001用于:
在当前下行子帧确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性;
所述PTI确定模块1002用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块1001用于:
在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性;
所述PTI确定模块1002用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块1001用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性;
所述PTI确定模块1002用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
一种实现方式中,所述信道情况确定模块1001用于:
在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI 与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性;
所述PTI确定模块1002用于:
如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
其中,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化时,所述信道情况确定模块1001用于:
获取PTI上报周期;
获取下行信道的宽带第一PMI的相关时间;
通过比较下行信道的宽带第一PMI的所述相关时间与所述PTI上报周期,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
其中,获取下行信道的宽带第一PMI的相关时间时,所述信道情况确定模块1001用于:
确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第一PMI的所述相关时间;或者,
确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第一PMI的所述相关时间;或者,
以不同时间间隔获取下行信道的一组宽带第一PMI;
分别确定下行信道不同时间间隔的宽带第一PMI的相关度;
将相关度大于相关度门限值的最大时间间隔确定为下行信道的宽带第一PMI的所述相关时间。
其中,判断下行信道的时变特性时,所述信道情况确定模块1001用于:
确定下行信道的多普勒频移;通过将所述多普勒频移与多普勒频移门限值进行比较,判断下行信道的时变特性;或者,
确定当前下行子帧上的宽带信道质量指示CQI和参考子帧上的CQI,所述参考子帧为当前下行子帧之前,与当前下行子帧的子帧间隔不小于N的最晚有效下行子帧;通过将当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值与第一CQI差值门限值进行比较,判断下行信道的时变特性;或者,
获取下行信道的宽带第二PMI和宽带CQI在PTI取值为1时的上报周期;获取下行 信道的宽带第二PMI的相关时间;获取宽带CQI的相关时间;通过将所述上报时间分别与下行信道的宽带第二PMI的相关时间、宽带CQI的相关时间进行比较,判断下行信道的时变特性。
其中,获取下行信道的宽带第二PMI的相关时间时,所述信道情况确定模块1001用于:
确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第二PMI的所述相关时间;或者,
确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第二PMI的所述相关时间。
其中,获取宽带CQI的相关时间时,所述信道情况确定模块1001用于:
确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带CQI的所述相关时间;或者,
确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带CQI的所述相关时间。
其中,判断下行信道的频变特性时,所述信道情况确定模块1001用于:
确定下行信道的多径时延扩展;通过将下行信道的所述多径时延扩展与多径时延扩展门限值进行比较,判断下行信道的频变特性;或者,
确定下行信道的最大时延;通过将下行信道的所述最大时延与最大时延门限值进行比较,判断下行信道的频变特性;或者,
分别确定下行信道的宽带CQI和子带CQI;通过将下行信道的所述宽带CQI和子带CQI的差值绝对值与第二CQI差值门限值进行比较,判断下行信道的频变特性。
基于与方法同样的发明构思,本发明实施例还提供一种终端,如图11所示,包括:
处理器1100,用于读取存储器1120中的程序,执行下列过程:
确定下行信道变化情况;
根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值;
收发机1110,用于在处理器1100的控制下接收和发送数据;
存储器1120,用于保存处理器1100在执行操作时所使用的数据。
其中,在图11中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器1100代表的一个或多个处理器和存储器1120代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机1110 可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备,用户接口1130还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1100负责管理总线架构和通常的处理,存储器1120可以存储处理器1100在执行操作时所使用的数据。
本发明实施例提供的终端,能够确定PTI,即终端上报的反馈报告类型,从而用于控制反馈上报过程。
基于与方法同样的发明构思,本发明实施例还提供一种预编码类型指示的取值确定装置,如图12所示,包括:
PTI历史取值判断模块1201,用于判断之前L次上报的预编码类型指示PTI的取值是否均为1,L为大于等于1的整数;
PTI确定模块1202,用于在所述PTI历史取值判断模块的判断结果为是时,则确定本次上报的PTI的取值为0;在所述PTI历史取值判断模块的判断结果为否时,确定本次上报的PTI的取值为1。
基于与方法同样的发明构思,本发明实施例还提供一种终端,包括:
处理器,用于读取存储器中的程序,执行下列过程:
判断之前L次上报的预编码类型指示PTI的取值是否均为1,L为大于等于1的整数;
如果是,则确定本次上报的PTI的取值为0;否则,确定本次上报的PTI的取值为1;
收发机,用于在处理器的控制下接收和发送数据;
存储器,用于保存处理器在执行操作时所使用的数据。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例,但本领域内的技术人员一旦得知了基本创造性概念,则可对这些实施例作出另外的变更和修改。所以,所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然,本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样,倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (47)

  1. 一种预编码类型指示的取值确定方法,其特征在于,包括:
    确定下行信道变化情况;
    根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值。
  2. 根据权利要求1所述的方法,其特征在于,所述确定下行信道变化情况,包括:
    在当前下行子帧上确定宽带第一预编码矩阵指示PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
    根据确定的所述下行信道变化情况,确定本次上报的PTI的取值,包括:
    如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  3. 根据权利要求1所述的方法,其特征在于,所述确定下行信道变化情况,包括:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
    根据确定的所述下行信道变化情况,确定本次上报的PTI的取值,包括:
    如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  4. 根据权利要求3所述的方法,其特征在于,所述在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,包括:
    在当前下行子帧上确定宽带第一PMI;
    判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
    如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
  5. 根据权利要求1所述的方法,其特征在于,所述确定下行信道变化情况,包括:
    在当前下行子帧确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性;
    根据确定的所述下行信道变化情况,确定本次上报的PTI的取值,包括:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1; 否则,确定本次上报的PTI的取值为0。
  6. 根据权利要求5所述的方法,其特征在于,所述在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性,包括:
    在当前下行子帧确定宽带第一PMI;
    判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的时变特性。
  7. 根据权利要求1所述的方法,其特征在于,所述确定下行信道变化情况,包括:
    在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性;
    所述根据确定的所述下行信道变化情况,确定本次上报的PTI的取值,包括:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  8. 根据权利要求7所述的方法,其特征在于,所述在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性,包括:
    在当前下行子帧确定宽带第一PMI;
    判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
    如果下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则判断下行信道的时变特性。
  9. 根据权利要求1所述的方法,其特征在于,所述确定下行信道变化情况,包括:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性;
    所述根据确定的所述下行信道变化情况,确定本次上报的PTI的取值,包括:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  10. 根据权利要求9所述的方法,其特征在于,所述在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性,包括:
    在当前下行子帧上确定宽带第一PMI;
    判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的时变特性;
    如果所述下行信道的时变特性指示所述下行信道变化慢,则判断下行信道的频变特性。
  11. 根据权利要求1所述的方法,其特征在于,所述确定下行信道变化情况,包括:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性;
    所述根据确定的所述下行信道变化情况,确定本次上报的PTI的取值,包括:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  12. 根据权利要求11所述的方法,其特征在于,所述在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性,包括:
    在当前下行子帧上确定宽带第一PMI;
    判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
    如果下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则判断下行信道的时变特性;
    如果所述下行信道的时变特性指示所述下行信道变化慢,则判断下行信道的频变特性。
  13. 根据权利要求3、4、7、8、11、12中任一项所述的方法,其特征在于,所述判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化,包括:
    获取PTI上报周期;
    获取下行信道的宽带第一PMI的相关时间;
    通过比较下行信道的宽带第一PMI的所述相关时间与所述PTI上报周期,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
  14. 根据权利要求13所述的方法,其特征在于,所述获取下行信道的宽带第一PMI的相关时间,包括:
    确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第一PMI的所述相关时间;或者,
    确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第一PMI的所述相关时间;或者,
    以不同时间间隔获取下行信道的一组宽带第一PMI;
    分别确定下行信道不同时间间隔的宽带第一PMI的相关度;
    将相关度大于相关度门限值的最大时间间隔确定为下行信道的宽带第一PMI的所述相关时间。
  15. 根据权利要求5~12任一项所述的方法,其特征在于,所述判断下行信道的时变特性,包括:
    确定下行信道的多普勒频移;通过将所述多普勒频移与多普勒频移门限值进行比较,判断下行信道的时变特性;或者,
    确定当前下行子帧上的宽带信道质量指示CQI和参考子帧上的CQI,所述参考子帧为当前下行子帧之前,与当前下行子帧的子帧间隔不小于N的最晚有效下行子帧;通过将当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值与第一CQI差值门限值进行比较,判断下行信道的时变特性;或者,
    获取下行信道的宽带第二PMI和宽带CQI在PTI取值为1时的上报周期;获取下行信道的宽带第二PMI的相关时间;获取宽带CQI的相关时间;通过将所述上报时间分别与下行信道的宽带第二PMI的相关时间、宽带CQI的相关时间进行比较,判断下行信道 的时变特性。
  16. 根据权利要求15所述的方法,其特征在于,所述获取下行信道的宽带第二PMI的相关时间,包括:
    确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第二PMI的所述相关时间;或者,
    确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第二PMI的所述相关时间。
  17. 根据权利要求15所述的方法,其特征在于,所述获取宽带CQI的相关时间,包括:
    确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带CQI的所述相关时间;或者,
    确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带CQI的所述相关时间。
  18. 根据权利要求9~12任一项所述的方法,其特征在于,所述判断下行信道的频变特性,包括:
    确定下行信道的多径时延扩展;通过将下行信道的所述多径时延扩展与多径时延扩展门限值进行比较,判断下行信道的频变特性;或者,
    确定下行信道的最大时延;通过将下行信道的所述最大时延与最大时延门限值进行比较,判断下行信道的频变特性;或者,
    分别确定下行信道的宽带CQI和子带CQI;通过将下行信道的所述宽带CQI和子带CQI的差值绝对值与第二CQI差值门限值进行比较,判断下行信道的频变特性。
  19. 一种预编码类型指示的取值确定方法,其特征在于,包括:
    判断之前L次上报的预编码类型指示PTI的取值是否均为1,L为大于等于1的整数;
    如果是,则确定本次上报的PTI的取值为0;
    否则,确定本次上报的PTI的取值为1。
  20. 一种预编码类型指示的取值确定装置,其特征在于,包括:
    信道情况确定模块,用于确定下行信道变化情况;
    PTI确定模块,用于根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值。
  21. 根据权利要求20所述的装置,其特征在于,所述信道情况确定模块用于:
    在当前下行子帧上确定宽带第一预编码矩阵指示PMI,判断在当前下行子帧上确定的 所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
    所述PTI确定模块用于:
    如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  22. 根据权利要求20所述的装置,其特征在于,所述信道情况确定模块用于:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
    所述PTI确定模块用于:
    如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  23. 根据权利要求20所述的装置,其特征在于,所述信道情况确定模块用于:
    在当前下行子帧确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性;
    所述PTI确定模块用于:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  24. 根据权利要求20所述的装置,其特征在于,所述信道情况确定模块用于:
    在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性;
    所述PTI确定模块用于:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  25. 根据权利要求20所述的装置,其特征在于,所述信道情况确定模块用于:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性;
    所述PTI确定模块用于:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  26. 根据权利要求20所述的装置,其特征在于,所述信道情况确定模块用于:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性;
    所述PTI确定模块用于:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  27. 根据权利要求22、24、26中任一项所述的装置,其特征在于,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化时,所述信道情况确定模块用于:
    获取PTI上报周期;
    获取下行信道的宽带第一PMI的相关时间;
    通过比较下行信道的宽带第一PMI的所述相关时间与所述PTI上报周期,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
  28. 根据权利要求27所述的装置,其特征在于,获取下行信道的宽带第一PMI的相关时间时,所述信道情况确定模块用于:
    确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第一PMI的所述相关时间;或者,
    确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第一PMI的所述相关时间;或者,
    以不同时间间隔获取下行信道的一组宽带第一PMI;
    分别确定下行信道不同时间间隔的宽带第一PMI的相关度;
    将相关度大于相关度门限值的最大时间间隔确定为下行信道的宽带第一PMI的所述相关时间。
  29. 根据权利要求23~26任一项所述的装置,其特征在于,判断下行信道的时变特性时,所述信道情况确定模块用于:
    确定下行信道的多普勒频移;通过将所述多普勒频移与多普勒频移门限值进行比较,判断下行信道的时变特性;或者,
    确定当前下行子帧上的宽带信道质量指示CQI和参考子帧上的CQI,所述参考子帧为当前下行子帧之前,与当前下行子帧的子帧间隔不小于N的最晚有效下行子帧;通过将当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值与第一CQI差值门限值进行比较,判断下行信道的时变特性;或者,
    获取下行信道的宽带第二PMI和宽带CQI在PTI取值为1时的上报周期;获取下行信道的宽带第二PMI的相关时间;获取宽带CQI的相关时间;通过将所述上报时间分别与下行信道的宽带第二PMI的相关时间、宽带CQI的相关时间进行比较,判断下行信道的时变特性。
  30. 根据权利要求29所述的装置,其特征在于,获取下行信道的宽带第二PMI的相关时间时,所述信道情况确定模块用于:
    确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第二PMI的所述相关时间;或者,
    确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第二PMI的所述相关时间。
  31. 根据权利要求29所述的装置,其特征在于,获取宽带CQI的相关时间时,所述信道情况确定模块用于:
    确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带CQI的所述相关时间;或者,
    确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带CQI的所述相关时间。
  32. 根据权利要求25或26所述的装置,其特征在于,判断下行信道的频变特性时,所述信道情况确定模块用于:
    确定下行信道的多径时延扩展;通过将下行信道的所述多径时延扩展与多径时延扩展门限值进行比较,判断下行信道的频变特性;或者,
    确定下行信道的最大时延;通过将下行信道的所述最大时延与最大时延门限值进行比较,判断下行信道的频变特性;或者,
    分别确定下行信道的宽带CQI和子带CQI;通过将下行信道的所述宽带CQI和子带CQI的差值绝对值与第二CQI差值门限值进行比较,判断下行信道的频变特性。
  33. 一种预编码类型指示的取值确定装置,其特征在于,包括:
    PTI历史取值判断模块,用于判断之前L次上报的预编码类型指示PTI的取值是否均为1,L为大于等于1的整数;
    PTI确定模块,用于在所述PTI历史取值判断模块的判断结果为是时,确定本次上报的PTI的取值为0;在所述PTI历史取值判断模块的判断结果为否时,确定本次上报的PTI的取值为1。
  34. 一种预编码类型指示的取值确定装置,其特征在于,包括:
    处理器,用于读取存储器中的程序,执行下列过程:
    确定下行信道变化情况;
    根据确定的所述下行信道变化情况,确定本次上报的预编码类型指示PTI的取值,所述PTI的取值指示了所述下行信道对应的信道状态反馈报告的类型;
    收发机,用于在处理器的控制下接收和发送数据;
    存储器,用于保存处理器在执行操作时所使用的数据。
  35. 根据权利要求34所述的装置,其特征在于,所述处理器用于:
    在当前下行子帧上确定宽带第一预编码矩阵指示PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同;
    所述处理器还用于:
    如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  36. 根据权利要求34所述的装置,其特征在于,所述处理器用于:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化;
    所述处理器还用于:
    如果在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  37. 根据权利要求34所述的装置,其特征在于,所述处理器用于:
    在当前下行子帧确定宽带第一PMI,判断在当前下行子帧上确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,并判断下行信道的时变特性;
    所述处理器还用于:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  38. 根据权利要求34所述的装置,其特征在于,所述处理器用于:
    在当前下行子帧确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,并判断下行信道的时变特性;
    所述处理器还用于:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  39. 根据权利要求34所述的装置,其特征在于,所述处理器用于:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的时变特性,并判断下行信道的频变特性;
    所述处理器还用于:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  40. 根据权利要求34所述的装置,其特征在于,所述处理器用于:
    在当前下行子帧上确定宽带第一PMI,判断在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI是否相同,判断下行信道的宽带第一PMI在当前PTI周期内是否会发生变化,判断下行信道的时变特性,并判断下行信道的频变特性;
    所述处理器还用于:
    如果在当前下行子帧确定的所述宽带第一PMI与上一次上报的宽带第一PMI相同,且下行信道的宽带第一PMI在当前PTI上报周期内不会发生变化,且所述下行信道的时变特性指示所述下行信道变化慢,且所述下行信道的频变特性指示所述下行信道的频率不平坦,则确定本次上报的PTI的取值为1;否则,确定本次上报的PTI的取值为0。
  41. 根据权利要求36、38、40中任一项所述的装置,其特征在于,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化时,所述处理器用于:
    获取PTI上报周期;
    获取下行信道的宽带第一PMI的相关时间;
    通过比较下行信道的宽带第一PMI的所述相关时间与所述PTI上报周期,判断下行信道的宽带第一PMI在当前PTI上报周期内是否会发生变化。
  42. 根据权利要求41所述的装置,其特征在于,获取下行信道的宽带第一PMI的相关时间时,所述处理器用于:
    确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第一PMI的所述相关时间;或者,
    确定下行信道的宽带第一PMI在M次变化中每相邻两次变化的时间间隔,所述M为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第一PMI的所述相关时间;或者,
    以不同时间间隔获取下行信道的一组宽带第一PMI;
    分别确定下行信道不同时间间隔的宽带第一PMI的相关度;
    将相关度大于相关度门限值的最大时间间隔确定为下行信道的宽带第一PMI的所述相关时间。
  43. 根据权利要求37~40任一项所述的装置,其特征在于,判断下行信道的时变特性时,所述处理器用于:
    确定下行信道的多普勒频移;通过将所述多普勒频移与多普勒频移门限值进行比较,判断下行信道的时变特性;或者,
    确定当前下行子帧上的宽带信道质量指示CQI和参考子帧上的CQI,所述参考子帧为当前下行子帧之前,与当前下行子帧的子帧间隔不小于N的最晚有效下行子帧;通过将当前下行子帧上的CQI和参考子帧上的CQI的差值绝对值与第一CQI差值门限值进行比较,判断下行信道的时变特性;或者,
    获取下行信道的宽带第二PMI和宽带CQI在PTI取值为1时的上报周期;获取下行信道的宽带第二PMI的相关时间;获取宽带CQI的相关时间;通过将所述上报时间分别与下行信道的宽带第二PMI的相关时间、宽带CQI的相关时间进行比较,判断下行信道的时变特性。
  44. 根据权利要求43所述的装置,其特征在于,获取下行信道的宽带第二PMI的相关时间时,所述处理器用于:
    确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带第二PMI的所述相关时间;或者,
    确定下行信道的宽带第二PMI在M’次变化中每相邻两次变化的时间间隔,所述M’为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带第二PMI的所述相关时间。
  45. 根据权利要求43所述的装置,其特征在于,获取宽带CQI的相关时间时,所述 处理器用于:
    确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平均值确定为下行信道的宽带CQI的所述相关时间;或者,
    确定下行信道的宽带CQI在M”次变化中每相邻两次变化的时间间隔,所述M”为大于1的整数;将所述时间间隔的平滑值确定为下行信道的宽带CQI的所述相关时间。
  46. 根据权利要求39或40所述的装置,其特征在于,判断下行信道的频变特性时,所述处理器用于:
    确定下行信道的多径时延扩展;通过将下行信道的所述多径时延扩展与多径时延扩展门限值进行比较,判断下行信道的频变特性;或者,
    确定下行信道的最大时延;通过将下行信道的所述最大时延与最大时延门限值进行比较,判断下行信道的频变特性;或者,
    分别确定下行信道的宽带CQI和子带CQI;通过将下行信道的所述宽带CQI和子带CQI的差值绝对值与第二CQI差值门限值进行比较,判断下行信道的频变特性。
  47. 一种预编码类型指示的取值确定装置,其特征在于,包括:
    处理器,用于读取存储器中的程序,执行下列过程:
    判断之前L次上报的预编码类型指示PTI的取值是否均为1,L为大于等于1的整数;
    如果是,则确定本次上报的PTI的取值为0;否则,确定本次上报的PTI的取值为1;
    收发机,用于在处理器的控制下接收和发送数据;
    存储器,用于保存处理器在执行操作时所使用的数据。
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