WO2014111021A1 - 信息上报的方法、用户设备、基站及系统 - Google Patents

信息上报的方法、用户设备、基站及系统 Download PDF

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Publication number
WO2014111021A1
WO2014111021A1 PCT/CN2014/070684 CN2014070684W WO2014111021A1 WO 2014111021 A1 WO2014111021 A1 WO 2014111021A1 CN 2014070684 W CN2014070684 W CN 2014070684W WO 2014111021 A1 WO2014111021 A1 WO 2014111021A1
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WIPO (PCT)
Prior art keywords
reported
csi information
reporting
indication
information
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PCT/CN2014/070684
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English (en)
French (fr)
Inventor
张兴炜
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华为技术有限公司
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Publication of WO2014111021A1 publication Critical patent/WO2014111021A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028Formatting
    • H04L1/0029Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057Physical resource allocation for CQI

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method for reporting information, a user equipment, a base station, and a system.
  • the advanced long-term evolution Rel-10/l 1/12 (Long Term Evolution-Advance, LTE-A) Rel-10/11/12 technology version is an enhancement to the LTE Rel-8/9 technology version, LTE-
  • the A system has higher bandwidth requirements than the LTE system and supports peak data rates up to 1G.
  • enhancements to hotspot areas have become a hot topic.
  • the hotspot area includes indoor and outdoor scenes, and is covered by a plurality of low-power micro-evolutionary base stations (Pico eNBs) to form a plurality of small cell networks (Small Cell Networks, SCNs).
  • the indoor Pico eNB only supports low-speed mobile user equipment (User Equipment, UE), and the outdoor Pico eNB supports medium-speed mobile UEs in addition to low-speed mobile UEs. Both Pico eNBs do not support high-speed mobile. UE.
  • the moving speed is called low speed moving between 0km/h and 15km/h, the moving speed is between 15km/h and 60km/h, which is called medium speed moving, and the moving speed is more than 60km/h.
  • CSI channel state information
  • CQI channel quality indicator
  • PMI Precoding Matrix Indicator
  • PTI Precoding Type Indication
  • Rank Indicator Rank Indicator
  • the manner in which the CSI information is reported by the UE includes two types: aperiodic reporting and periodic reporting.
  • the UE In the periodic reporting mode, the UE periodically sends the CSI information to the eNB according to the preset duration interval.
  • the UE receives the CSI report triggering indication sent by the eNB, and sends the CSI information to the eNB according to the indication. .
  • the non-periodic reporting of CSI information supplements the periodic reporting of CSI information.
  • the channel change of the SCN is relatively slow compared with the macro eNodeB (Macro eNB).
  • the CSI information of the UE feedback channel change is small. Therefore, if the above-mentioned periodic reporting of CSI information is adopted, the uplink signaling overhead is large, and there is room for optimization. Summary of the invention
  • the embodiments of the present invention provide a method for information reporting, a user equipment, a base station, and a system, which can save uplink signaling overhead when a UE reports CSI information.
  • an embodiment of the present invention provides a method for reporting information, including:
  • the user equipment UE determines whether the CSI information to be reported is the same as the previously reported CSI information, to obtain a determination result;
  • the indication identifier Determining, according to the judgment result, the indication identifier to the base station in the reporting subframe, where the indication identifier is used to indicate whether the CSI information to be reported is the same as the previously reported CSI information, where the indication identifier has less bits than the CSI. The bit of information.
  • the determining, by the UE, whether the CSI information to be reported is the same as the previously reported CSI information specifically includes:
  • a third possible implementation of the first aspect is also provided, in the first aspect
  • the reporting the CSI information to be reported to the base station in the next reporting subframe specifically:
  • the CSI information to be reported is reported to the base station in the next reporting sub-frame corresponding to the upper sub-frame in the next adjacent sub-band period, the sub-band reporting period
  • the method includes multiple reporting subframes that report multiple sub-band CSI information.
  • the CSI information to be reported is reported to the base station in a next reporting subframe corresponding to the upper subframe, where the broadband reporting period includes one The reporting subframe of the broadband CSI information and the multiple sub-band reporting periods are reported.
  • the CSI information is any one of the following indications or a combination of at least two indications:
  • Channel quality indication CQI Channel quality indication CQI, precoding matrix indication PMI, precoding type indication PTI and rank indication
  • the indication identifier occupies at least one bit
  • the bit is 0, indicating that at least one of the CSI information to be reported is the same as the at least one of the previously reported CSI information, where the bit is 1 indicates that at least one of the CSI information to be reported is reported and previously reported. At least one of the CSI information is not the same;
  • the bit is 1 indicates that at least one of the CSI information to be reported is the same as the at least one of the previously reported CSI information, where the bit is 0, indicating at least one indication of the CSI information to be reported. At least one of the previous CSI information of the above is not the same.
  • the indication identifier occupies 2 a bit, where one bit is used to represent whether the CQI in the CSI information to be reported is the same as the CQI in the previously reported CSI information, and the other bit is used to represent the PMI in the CSI information to be reported and the previously reported CSI. Whether the PMI in the information is the same;
  • the reporting the CSI information to be reported to the base station includes:
  • the CQI and the PMI in the CSI information to be reported are not the same as the CQI or the PMI in the previously reported CSI information, report the to-be-reported indication different from the previously reported CSI information to the base station, or Both the CQI and the PMI in the CSI information to be reported are reported to the base station.
  • the user equipment UE determines the CSI information to be reported and the previous report. Before the CSI information is the same, the method further includes:
  • an embodiment of the present invention provides a method for information reporting, including: in a process of periodically reporting channel state information CSI, a base station receives an indication identifier reported by a user equipment UE, where the indication identifier is And determining whether the CSI information to be reported by the UE is the same as the CSI information previously reported by the UE, where the bit of the indication identifier is less than the bit of the CSI information.
  • the method further includes: receiving, when the indication identifier, the CSI information to be reported is not the same as the previously reported CSI information, The CSI information to be reported reported by the UE.
  • the second possible implementation manner of the second aspect is further provided, and the second possibility in the second aspect
  • the receiving, by the UE, the CSI information to be reported specifically includes:
  • a third possible implementation of the second aspect is also provided, in the second aspect
  • the next reporting subframe corresponding to the upper subframe the CSI information to be reported reported by the UE is received, and the subband is reported.
  • the period includes multiple reporting subframes that report multiple sub-band CSI information;
  • the next reported subframe corresponding to the upper subframe receives the CSI information to be reported reported by the UE, where the broadband reporting period includes An reporting subframe that reports wideband CSI information and a reporting subframe that reports multiple subband reporting periods.
  • the CSI information is any one of the following indications or at least two - - Combination of instructions:
  • Channel quality indication CQI Channel quality indication CQI, precoding matrix indication PMI, precoding type indication PTI and rank indication
  • the indication identifier occupies at least one bit
  • the bit is 0, indicating that at least one of the CSI information to be reported is the same as the at least one of the previously reported CSI information, where the bit is 1 indicates that at least one of the CSI information to be reported is reported and previously reported. At least one of the CSI information is not the same;
  • the bit is 1 indicates that at least one of the CSI information to be reported is the same as the at least one of the previously reported CSI information, where the bit is 0, indicating at least one indication of the CSI information to be reported. At least one of the previous CSI information of the above is not the same.
  • the second aspect is also provided The sixth possible implementation manner, in the sixth possible implementation manner of the second aspect, when the CSI information is a combination of CQI and PMI, the indication identifier occupies 2 bits, one of The bit is used to indicate whether the CQI in the CSI information to be reported is the same as the CQI in the previously reported CSI information, and the other bit is used to represent whether the PMI in the CSI information to be reported and the PMI in the previously reported CSI information are the same;
  • the receiving, by the UE, the CSI information to be reported specifically includes:
  • the CQI and the PMI in the CSI information to be reported are different from the CQI and the PMI in the previously reported CSI information, the CQI and the PMI in the CSI information to be reported reported by the UE are received;
  • the CQI and the PMI in the CSI information to be reported are not the same as the CQI or the PMI in the previously reported CSI information, receive a different indication to be reported that is reported by the UE and is different from the previously reported CSI information, or Receiving CQI and PMI in the CSI information to be reported reported by the UE.
  • the seventh possible implementation manner of the second aspect in the seventh possible implementation manner of the second aspect, further includes: before the reporting of the indication flag reported by the user equipment by the user equipment, the method further includes:
  • the new mode indication signaling is used to indicate that the UE performs "CSI information" according to the method described in the first aspect.
  • the embodiment of the present invention further provides a user equipment, including:
  • the information reporting unit is configured to report CSI information to the base station during the periodic reporting of the channel state information CSI;
  • a determining unit configured to determine whether the CSI information to be reported is the same as the CSI information previously reported by the information reporting unit, to obtain a determination result
  • the identifier reporting unit is configured to report, according to the judgment result of the determining unit, the indication identifier to the base station in the reporting subframe, where the indication identifier is used to indicate whether the CSI information to be reported is the same as the previously reported CSI information, where The bit of the indication identifier is less than the bit of the CSI information.
  • the information reporting unit is further configured to: when the determining result of the determining unit is the CSI information to be reported and the previously reported CSI information When the information is different, the CSI information to be reported is reported to the base station.
  • a second possible implementation manner of the third aspect is further provided, and the second possible aspect in the third aspect
  • the determining unit specifically includes:
  • a first determining sub-unit configured to determine whether the CSI information to be reported is completely equal to the previously reported CSI information, and if the determination result is yes, determining the CSI information to be uploaded and the previous The CSI information on the top is the same, otherwise it is different;
  • a second determining sub-unit configured to determine whether a difference between the CSI information to be reported and the previously reported CSI information exceeds a preset threshold, and if the determination result is no, determine the to-be-reported
  • the CSI information is the same as the previously reported CSI information, otherwise it is not the same.
  • the information reporting unit specifically includes:
  • a first reporting sub-unit configured to report the to-be-reported to the base station on a next reporting subframe
  • a second reporting sub-unit configured to receive the aperiodic reporting indication sent by the base station, and report the CSI information to be reported to the base station according to the aperiodic reporting indication.
  • the first reporting sub-unit is specifically configured to: in a frequency selective reporting mode:
  • the CSI information to be reported is reported to the base station in the next uplink sub-frame corresponding to the upper subframe, and the sub-band reporting period includes reporting once. Multiple reporting subframes of multiple sub-band CSI information;
  • the CSI information to be reported is reported to the base station in a next uplink subframe corresponding to the upper subframe, where the broadband reporting period includes a reporting broadband CSI.
  • the CSI information reported by the information reporting unit is any one of the following indications or a combination of at least two indications:
  • Channel quality indication CQI Channel quality indication CQI, precoding matrix indication PMI, precoding type indication PTI and rank indication RI.
  • the third aspect is also provided The sixth possible implementation manner, in the sixth possible implementation manner of the third aspect, the indication identifier reported by the identifier unit is occupied by at least one bit;
  • the bit reported by the identifier reporting unit is 0, indicating that at least one of the CSI information to be reported is the same as the indication of at least one of the previously reported CSI information, where the bit is 1 indicating that the CSI information to be reported is in the CSI information to be reported. At least one indication is not the same as at least one of the previously reported CSI information;
  • the bit reported by the identifier reporting unit is 1 indicating at least one of the CSI information to be reported. - an indication is the same as at least one of the previously reported CSI information, the bit being 0 indicates that at least one of the CSI information to be reported indicates that the indication is not the same as the at least one of the previously reported CSI information.
  • the identifier information is further used to: when the CSI information is CQI and PMI
  • the combination identifier of the upper layer occupies 2 bits, wherein one bit is used to represent whether the CQI in the CSI information to be uploaded is the same as the CQI in the previously reported CSI information, and One bit is used to indicate whether the PMI in the CSI information to be reported is the same as the PMI in the previously reported CSI information;
  • the information reporting unit is specifically configured to:
  • the CQI and the PMI in the CSI information to be reported are different from the CQI and the PMI in the previously reported CSI information, the CQI and the PMI in the CSI information to be reported are reported to the base station;
  • the base station reports a different to-be-reported indication in the previously reported CSI information, or Both the CQI and the PMI in the CSI information to be reported are reported to the base station.
  • the user equipment further includes:
  • a receiving unit configured to: before the determining unit determines whether the CSI information to be reported is the same as the CSI information reported by the information reporting unit, the new mode indication signaling sent by the base station, the new mode indication signaling And is used to instruct the user equipment to report the indication identifier.
  • the embodiment of the present invention further provides a base station, including:
  • an identifier receiving unit configured to receive an indication identifier that is reported by the user equipment UE, in the reporting subframe, in the process of periodically reporting the channel state information CSI, where the indication identifier is used to represent the CSI information to be reported by the UE and the Whether the CSI information reported by the UE is the same, and the bit of the indication identifier is less than the bit of the CSI information.
  • the base station further includes: Receiving, by the information receiving unit, the to-be-reported report reported by the UE, when the indication identifier received by the identifier receiving unit indicates that the CSI information to be reported is different from the previously reported CSI information, CSI information.
  • the information receiving unit is specifically configured to:
  • the indication sending unit is further configured to send an aperiodic indication to the UE;
  • the information receiving unit is further configured to receive the CSI information to be reported reported by the UE according to the aperiodic reporting indication.
  • the information receiving unit specifically includes:
  • a first receiving subunit configured to receive the CSI information to be reported reported by the UE, on a next reporting subframe that is adjacent to the reporting subframe;
  • the sub-band reporting period includes multiple reporting subframes that report multiple sub-band CSI information at a time;
  • a third receiving subunit configured to receive the CSI information to be reported reported by the UE, the broadband, in a next reporting subframe corresponding to the reporting subframe in a next adjacent broadband reporting period
  • the reporting period includes a reporting subframe that reports wideband CSI information and a reporting subframe that reports multiple subband reporting periods.
  • the fourth possible implementation manner of the fourth aspect is further provided in a fourth possible implementation manner of the fourth aspect, the CSI information received by the information receiving unit is any one of the following indications or a combination of at least two indications:
  • Channel quality indication CQI Channel quality indication CQI, precoding matrix indication PMI, precoding type indication PTI and rank indication
  • the first possibility, the second possibility, the third possibility in the fourth aspect or the fourth aspect The fourth possible implementation manner of the fourth aspect is also provided in the fourth possible implementation manner.
  • the identifier receiving unit Receiving the indication identifier occupying at least one bit;
  • the bit received by the identifier receiving unit is 0, indicating that at least one of the CSI information to be reported is the same as the indication of at least one of the previously reported CSI information, where the bit is 1 indicating the CSI information to be reported. At least one indication is not the same as at least one of the previously reported CSI information;
  • the bit received by the identifier receiving unit is 1 indicating that at least one of the CSI information to be reported is the same as the indication of at least one of the previously reported CSI information, where the bit is 0, indicating that the CSI information to be reported is The at least one indication is not the same as the at least one of the previously reported CSI information.
  • the fourth aspect is further provided.
  • the sixth possible implementation manner in the sixth possible implementation manner of the fourth aspect, when the CSI information is a combination of CQI and PMI, the indication identifier received by the identifier receiving unit occupies 2 a bit, where one bit is used to represent whether the CQI in the CSI information to be reported is the same as the CQI in the previously reported CSI information, and the other bit is used to represent the PMI in the CSI information to be reported and the previously reported CSI. Whether the PMI in the information is the same;
  • the information receiving unit is specifically configured to:
  • the CQI and the PMI in the CSI information to be reported reported by the UE are received;
  • the to-be-reported indication that is different from the previously reported CSI information reported by the UE is received, or Receiving CQI and PMI in the CSI information to be reported reported by the UE.
  • a mode switching indication unit configured to receive, by the identifier receiving unit, the UE in a reporting subframe Before the indication of the indication, the new mode indication signaling is sent to the UE, where the new mode indication signaling is used to indicate that the UE reports the indication identifier.
  • the embodiment of the present invention further provides a system for information reporting, including: a user equipment UE and a base station, where
  • the UE in the process of periodically reporting the channel state information CSI, determines whether the CSI information to be reported is the same as the previously reported CSI information, to obtain a determination result, and reports the indication identifier to the base station according to the determination result;
  • the base station is configured to receive, by using the reporting subframe, an indication identifier that is reported by the UE, where the indication identifier is used to indicate whether the CSI information to be reported by the UE is the same as the CSI information previously reported by the UE;
  • the bit indicating the indication is less than the bit of the CSI information.
  • the information reporting method, the user equipment, the base station, and the system provided by the embodiment of the present invention can determine whether the CSI information to be reported is the same as the previously reported CSI information, and then judges according to the judgment before the CSI information is reported to the base station. As a result, an indication indicator is sent to the base station, where the indication identifier is used to indicate whether the CSI information to be reported is the same as the previously reported CSI information.
  • the UE does not send the same CSI information to the base station.
  • the CSI information to be reported may be the same as the previously reported CSI information. Avoid repeatedly reporting the same CSI information, thereby saving uplink signaling overhead. In particular, for a scene in which the channel change of the SCN is relatively slow and the CSI information reported by the UE changes little, the uplink signaling overhead can be saved.
  • FIG. 2 is a flowchart of a method for information on an embodiment of the present invention.
  • FIG. 3( a ) to 3 ( d ) are schematic diagrams of CSI information on the embodiment of the present invention
  • - Figure 4 (a) and Figure 4 (b) are schematic diagrams of another CSI information in the embodiment of the present invention
  • Figure 5 is a schematic diagram of another CSI information reporting in the embodiment of the present invention
  • FIG. 6 is a flowchart of another method for reporting information in an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of another base station according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a system for reporting information according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of still another user equipment according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of another base station according to an embodiment of the present invention.
  • FIG. 14 is a schematic diagram of another system for reporting information in an embodiment of the present invention. detailed description
  • a method for reporting CSI information by the UE in the SCN scenario is first introduced.
  • the UE may report the CSI information to the base station by using the periodic reporting or the non-period reporting.
  • the periodic reporting method is further divided into a broadband reporting mode and a frequency selective reporting mode.
  • the UE reports the CSI information of the Wide Band (WB) to the base station according to the preset interval duration Np.
  • WB Wide Band
  • Np the preset interval duration
  • the frequency selection reporting mode one WB is divided into multiple bandwidths (Bandwidth Part, called BP), and each BP contains multiple subbands (Sub Band, SB).
  • the best subband (Best SB) is selected in each BP, and the UE reports the CSI information of the best subband.
  • the WB includes three BPs and the SB reports the loop twice.
  • the UE first reports the CSI information of the WB, and then reports the CSI information of the SB1, the CSI information of the SB2, and the CSI information of the SB3.
  • the CSI information of the reporting SB is cycled twice, thereby ending the frequency selection, wherein the interval between the four CSI information is Np.
  • the period in which the frequency selection is reported is referred to as a broadband period, and in a broadband period in FIG.
  • a wideband period consists of two subband periods.
  • the embodiment of the invention provides a method for information reporting, which is applied to the UE side. As shown in FIG. 2, the method includes:
  • the UE determines whether the CSI information to be reported is the same as the previously reported CSI information, to obtain a determination result.
  • the previously reported CSI information may be CSI information reported by the UE in the previous reported subframe.
  • the UE reports the CSI information of the WB to the base station according to the period Np shown in Figure 1 (a) (the subsequent tube is called reporting CSI information).
  • the UE needs to report the CSI information to the base station.
  • the UE determines whether the CSI information to be reported is the same as the CSI information reported by the UE in the reporting subframe 1.
  • whether the CSI information to be reported is the same as the previously reported CSI information is not determined whether the CSI information to be reported is different from all the previously reported CSI information, but It is determined whether the CSI information to be reported is the same as a CSI information that has been reported previously.
  • the UE determines whether the CSI information to be reported is the same as the CSI information reported in the previous time.
  • the UE reports the indication identifier to the base station in the reporting subframe according to the determination result.
  • the indication identifier is used to indicate whether the CSI information to be reported is the same as the previously reported CSI information.
  • the UE cancels reporting the CSI information on the reporting subframe 2, and reports a representation to the base station on the reporting subframe 2.
  • the same indicator After receiving the indication identifier, the base station inherits the CSI information reported by the UE on the reporting subframe 1 as one of the basis for determining the MCS used in the downlink DL in the next stage.
  • the bit of the indication identifier is less than the bit of the CSI information, for example, the indication identifier may be an identifier of 1 to 4 bits, and the bit may be 0 or 1. In a preferred solution of the embodiment of the present invention, the indication identifier is a 1-bit identifier.
  • the CSI information reported by the UE carries at least one indication of the CQI, the PMI, the PTI, or the RI, and the UE identifies at least one indication carried in the CSI information to be reported by using a one-bit identifier.
  • the at least one indication carried in the previously reported CSI information is the same.
  • the bit represents the to be reported.
  • the CSI information is the same as the previously reported CSI information.
  • the CQI occupies 4 bits
  • the PMI occupies 4 bits
  • the second codeword CQI or PMI occupies 3 bits
  • the PTI occupies 1 to 2 bits
  • the RI occupies 1 to 3 bits.
  • the CSI information reported by the UE carries at least one CQI, that is, the CSI information reported by the UE is at least 4 bits.
  • the indication identifier indicates whether the successively transmitted CSI information is the same by the opposite two bits. For example, when the indication flag is 1, it indicates that the CSI information sent in the same manner is the same. When the indication flag is 0, the CSI information sent in sequence is different, or when the indication flag is 0, the CSI information sent in the same direction is the same. 1 means that the CSI information sent in succession is different. In the embodiment of the present invention, the indication that the indication is 0 indicates that the CSI information sent in the same manner is the same, and the indication identifier is 1 indicates that the CSI information sent in sequence is different.
  • the UE does not determine whether the CSI information to be reported is the same as the previously reported CSI information, but reports the CSI information on each reported subframe.
  • the channel change of the SCN is relatively slow, and most of the reported CSI information is the same.
  • This reporting method of reporting the same CSI information repeatedly causes unnecessary signaling overhead on the uplink.
  • the information reporting method provided by the embodiment of the present invention can determine whether the CSI information to be reported and the previously reported CSI information are the same before reporting the CSI information, and then report an indication to the base station to indicate whether the two are the same. logo.
  • the base station uses the CSI information previously reported by the UE as one of the basis for selecting the downlink MCS, and the UE does not need to repeat the same CSI information to the base station. Since the bit indicating the identifier is smaller than the bit of the CSI information, compared with the case where the CSI information reported by the UE in each of the reported subframes is the same as the previously reported CSI information, the CSI information to be reported may be the same as the previously reported CSI information. Avoid repeatedly reporting the same CSI information, thereby saving the signaling overhead of the uplink. In particular, in the scenario where the channel change of the SCN is relatively slow and the CSI information reported by the UE changes little, the uplink signaling overhead can be saved.
  • the UE - when the result of the determination in step 201 is that the CSI information to be reported is different from the previously reported CSI information, the UE - In addition to the indication indication, the CSI information to be reported may be reported to the base station, so that the base station uses the CSI information reported by the UE as one of the basis for selecting the downlink MCS of the next stage.
  • the timing of the CSI information to be reported by the UE may be performed before the step 202, after the step 202, or simultaneously with the step 202, which is not limited by the embodiment of the present invention. It should be noted that, when the CSI information to be reported is different from the previously reported CSI information, the UE reports a 1-bit indication flag in addition to the CSI information to be reported, compared with the prior art. The signaling overhead is one more bit than the prior art. But this does not contradict the technical problems solved.
  • the CSI information of the UE feedback channel change is small, and most of the CSI information to be reported is the same as the previously reported CSI information, so as a whole, most of the reported CSI information is In the case where the previously reported CSI information is the same, in the rare case, the effect of reporting the 1-bit indication flag on the overall saving signaling overhead in a few cases is negligible.
  • the UE when the UE reports the CSI information to the base station for the first time, that is, when the CSI information is not reported before the CSI information is reported by the UE, the UE may first send one or more CSI information to the base station, so that Provides historical CSI information that can be judged for subsequent reporting of CSI information.
  • the method for the UE to send one or more CSI information to the base station may be implemented in the following four manners.
  • the UE reports the CSI information to the base station once.
  • the UE At the beginning of reporting the CSI information, the UE first initiates an aperiodic reporting process, and reports the CSI information reflecting the current channel status to the base station.
  • the UE receives the aperiodic reporting indication sent by the base station, and reports to the base station according to the non-periodic reporting indication.
  • the base station At the beginning of reporting the CSI information, the base station first initiates an aperiodic reporting procedure, and sends a non-periodic reporting indication to the UE, instructing the UE to report the CSI information. After receiving the aperiodic reporting indication, the UE reports one or more CSI information to the base station. In addition, the UE may also receive multiple aperiodic reporting indications sent by the base station, and report CSI information to the base station each time an aperiodic reporting indication is received.
  • the CSI information is CSI information that reflects the current channel state when the CSI information is reported. .
  • the UE periodically reports the CSI information to the base station within a preset duration.
  • the UE performs a periodic reporting process, and periodically reports the CSI information to the base station according to the existing reporting manner. After a period of time (preset duration), the UE stops the existing periodic report. - - Mode, then report the CSI information according to the implementation shown in Figure 2.
  • the preset duration is greater than the reporting interval.
  • the preset duration may be 4 Np.
  • the UE reports the CSI information according to the implementation manner shown in FIG. 2 .
  • the preset duration may be set according to the characteristics of the channel change. For example, the channel change in the SCN scenario is slow.
  • the CSI information reported in each case is usually the same, and a shorter preset duration may be set. If the channel change is relatively large in a cell scenario, a longer preset duration can be set.
  • the embodiment of the present invention does not limit the setting of the preset duration.
  • the UE periodically reports the CSI information to the base station, and when the number of the same CSI information reported exceeds the preset number, the CSI information is periodically reported.
  • the UE performs a periodic reporting process, and periodically reports the CSI information to the base station according to the existing implementation manner. After the channel state is stable, multiple CSI information reported by the UE are the same. If the number of the same CSI information that the UE continuously reports exceeds the preset number, for example, more than five, the UE stops the existing periodic reporting mode, and then reports the CSI information according to the implementation manner shown in FIG.
  • the UE reports the one or more CSI information to the base station.
  • the reporting mode shown in FIG. 2 needs to compare the CSI information to be reported with the historical CSI information (the previously reported CSI information).
  • the reporting of one or more CSI information by the UE to the base station may provide historical CSI information for comparison for the first reporting of the CSI information.
  • the UE determines whether the CSI information to be reported is the same as the previously reported CSI information, and specifically includes the following two determination manners.
  • the UE may alternatively use:
  • the UE determines whether the CSI information to be reported is completely equal to the previously reported CSI information. If the judgment result is yes, it is determined that the CSI information to be reported is the same as the previously reported CSI information, and if the judgment result is no, it is determined to be reported. The CSI information is different from the previously reported CSI information. Taking the 4-bit CQI indication as an example, if the CQI indication of the UE is 1011, and the CQI indication of the UE is 1010, the UE determines that the CQI indication to be reported and the previously reported CQI indication are not the same.
  • the UE determines whether the difference between the CSI information to be reported and the previously reported CSI information exceeds a preset threshold. If the judgment result is no, the CSI information to be reported is determined to be the same as the previously reported CSI information. If yes, it is determined that the CSI information to be reported is different from the previously reported CSI information.
  • the CQI indication previously reported by the UE is 1011, and the UE is to be reported this time.
  • the CQI indication is 1010, and the difference between the two is 1 and does not exceed the preset threshold 2. Therefore, the UE determines that the CQI indication to be reported is the same as the previously reported CQI indication; or the CQI indication previously reported by the UE is 1011, the UE this time. The CQI indication to be reported is also 1011, and the difference between the two is 0. Therefore, the UE determines that the CQI indication to be reported this time is the same as the previously reported CQI indication.
  • the UE reports the CSI information to be reported to the base station after reporting the indication, which is: the UE reports the CSI to the base station in the next reporting subframe.
  • the information, or the aperiodic reporting indication sent by the receiving base station reports the CSI information to be reported to the base station according to the aperiodic reporting indication, where the aperiodic reporting indication is a reporting indication sent by the base station according to the indication identifier reported by the UE.
  • the CSI information to be reported in the next reporting subframe may be reported to be reported in the next reporting subframe adjacent to the reporting subframe of the reporting indicator.
  • the UE reports the indication 1 to the base station on the reporting subframe 3, and then reports the CSI information to be reported to the base station on the reporting subframe 4, and the CSI information to be reported is reported.
  • the CSI information reported on the reporting subframe 3 is prepared for the UE.
  • the UE reports the indication identifier 1 to the base station on the reporting subframe 3, and then reports the CSI information to be reported to the base station on the reporting subframe 4, the to-be-reported The CSI information prepares the CSI information of the SB2 reported by the UE on the reporting subframe 3. Then, starting from the reporting subframe 5, the UE delays reporting the indications of SB3, WB, and SB1.
  • the UE may not report the CSI information to the base station on the next adjacent uplink subframe, but wait for the base station to send a non-periodic reporting indication.
  • the base station After receiving the indication identifier 1 reported by the UE, the base station sends a non-periodic reporting indication to the UE, instructing the UE to trigger an aperiodic reporting procedure.
  • the UE reports the CSI information to be reported to the base station. For example, in the broadband reporting mode shown in FIG.
  • the UE reports the indication 1 to the base station on the reporting subframe 3, and then receives the aperiodic reporting indication sent by the base station on a certain subframe X after reporting the subframe 3.
  • the UE reports the indication 1 to the base station on the reporting subframe 3, and then receives the non-transmitted by the base station in a certain subframe X subsequent to the reporting subframe 3.
  • the CSI information to be reported is the CSI information of the SB2 that the UE prepares to report on the reporting subframe 3.
  • the CSI information to be reported in the next reporting subframe may be reported to be reported in the next reporting subframe corresponding to the reporting subframe.
  • the UE in the frequency-selected reporting mode, the UE may be in the next adjacent sub-band period corresponding to the reporting subframe corresponding to the reporting subframe of the indication identifier (ie, the next neighbor corresponding to the reporting subframe of the reporting indication flag)
  • the reporting sub-band periodically reports the subframe, and reports the CSI information to the base station, where the reporting sub-band period includes multiple uplink subframes that report multiple sub-band CSI information at a time. For example, in FIG.
  • the upper 4 subframes 4 to 4 subframes 4 are the reporting subframes of the SB1, SB2, and SB3, that is, the 3 Np between the reporting subframe 1 and the reporting subframe 4.
  • the UE sends an indication flag 1 of SB2(1) on the subframe 3, and then sequentially reports SB3(1) on the reporting subframe 4 and the reporting subframe 5.
  • the indication of SB1 (2) is 0. Wherein (1) represents the first subband period in the broadband period, and (2) represents the second subband period in the broadband period.
  • the UE On the reporting subframe 6 (the subframe is reported in the second sub-band period of SB2), the UE reports the CSI information of SB2(1), and then sequentially reports SB3 (2) and the second on the reporting subframe 7 and the reporting subframe 8.
  • the indication 1 of the WB of the wideband period sequentially reports the indications 0 of SB1(1) and SB2(1) of the second wideband period on the reporting subframe 9 and the reporting subframe 10.
  • the UE On the reporting subframe 11 (the first subband period reporting subframe of SB3), the UE reports the CSI information of the first wideband period SB3 (2), and reports the subframe 15 (the reported subframe of the third wideband period of the WB)
  • the CSI information of the WB of the second broadband period is reported, and so on.
  • the UE may also use the next phase corresponding to the reporting subframe that reports the indication flag in the next adjacent reporting broadband period (ie, the next phase corresponding to the reporting subframe that reports the indication identifier) And reporting the to-be-reported CSI information to the base station, where the reporting broadband period includes a reporting subframe that reports the wideband CSI information and a reporting subframe of the multiple sub-band periods.
  • the reporting broadband period includes a reporting subframe that reports the wideband CSI information and a reporting subframe of the multiple sub-band periods.
  • the reporting subframe 1 to the reporting subframe 7 are sequentially reported WB, SB1 (1), SB2 (1), SB3 (1), SB1 (2), SB2 (2), and SB3 (
  • the reporting subframe of 2) that is, the 7 Np of the upper 4 subframes 1 to the reporting subframe 7 constitutes a broadband period.
  • the UE sequentially reports WB, SB1 (1), SB2 (1), SB3 (1), SB1 (2), SB2 (2) and on the reporting subframes 1 to 7.
  • the indication of SB3 (2) is 0, 0, 1, 0, 0, 0, and 1, in which the upper 4 subframes - -
  • the reporting flag 1 of the SB2 (1) and SB3 (2) are reported respectively on the reporting subframe 7.
  • the UE On the reporting subframes reporting SB2(1) (upper subframe 10) and SB3(2) (up reporting subframe 14) in the second wideband period, the UE respectively SB2(1) and SB3 (2) in the first wideband period
  • the CSI information is given to the base station.
  • the indication identifier occupies 2 bits, wherein one bit represents whether the CQI in the CSI information to be reported is the same as the CQI in the previously reported CSI information. The other bit represents whether the PMI in the CSI information to be reported is the same as the PMI in the previously reported CSI information. If the CQI and the PMI in the CSI information to be reported are different from the CQI and the PMI in the previously reported CSI information, after reporting the indication identifier 11, the UE reports the CQI and PMI in the CSI information to be reported to the base station.
  • the UE reports the CSI information to the base station and the previously reported CSI information.
  • the CQI and the PMI in the CSI information to be reported are reported to the base station.
  • the broadband reporting mode is taken as an example.
  • the UE reports 00 to the base station, where the first 0 is an indication of the CQI, indicating that the CQI to be reported and the previously reported.
  • the CQI is the same;
  • the second 0 is the indication of the PMI, indicating that the PMI to be reported this time is the same as the previously reported PMI.
  • the UE reports 10 to the base station, where the first one is the indication identifier of the CQI, indicating that the CQI to be reported is not the same as the previously reported CQI; the second 0 is the indication identifier of the PMI, indicating the present The PMI to be reported next time is the same as the previously reported PMI.
  • the UE reports 11 to the base station, where the first one is the indication identifier of the CQI, indicating that the CQI of the current one is the same as the CQI of the previous one; the second one is the indication identifier of the PMI. , indicating that the PMI to be reported this time is different from the previously reported PMI.
  • the UE When the content reported by the UE is 00, the UE does not report to the base station the CQI and the PMI to be reported (the CQI and the PMI to be reported on the subframe 1); when the content reported by the UE is 11, the UE is in the next phase.
  • the neighboring reporting subframe for example, the reporting subframe 6 in FIG. 5 or reporting the CQI and PMI to be reported to the base station according to the aperiodic reporting indication of the base station (the CQI and PMI to be reported on the reporting subframe 5);
  • the UE reports the CQI and PMI to be reported to the base station in the next adjacent reporting subframe (for example, the reporting subframe 4 in FIG.
  • the UE may also report the indication different from the previous to the base station. For example, in FIG. 5, if the reporting subframe 3 reports 10, the UE reports only the CQI to be reported on the reporting subframe 3 to the base station, but does not report the report. - - PMI on the frame 3 to be uploaded to the base station.
  • the CSI information includes two indications as an example.
  • the CSI information includes several indication identifiers indicating that the UE can report several bits, and then reports the to-be-reported according to the reported multi-bit indication identifier.
  • One or all of the indications are not described in detail in the embodiments of the present invention.
  • the multi-bit indication flag is reported by the UE as an example.
  • the UE can also report the multi-bit indication identifier based on the same reporting manner, and details are not described herein again.
  • the broadband reporting mode can be mode 1-0 and model-1
  • the frequency selection reporting mode can be mode2-0 and mode2-l.
  • the UE does not report the PMI.
  • the UE may report the CSI information according to the reporting mode shown in Figure 3 or Figure 4.
  • the UE reports the CQI and the PMI.
  • the UE can report the CSI information according to the reporting mode shown in FIG.
  • the UE may further receive the new mode indication signaling sent by the base station, where the new mode indication signaling is used to indicate that the UE reports the CSI information to the base station according to the reporting manner shown in FIG. 2 .
  • the UE Before receiving the new mode indication signaling, the UE reports the CSI information to the base station according to the existing reporting manner. After receiving the new mode indication signaling, the UE reports the CSI information according to the reporting manner shown in FIG. 2 .
  • the UE does not determine whether the CSI information to be reported is the same as the previously reported CSI information, but reports the CSI information on each reporting subframe.
  • the channel change of the SCN is relatively slow, and most of the reported CSI information is the same.
  • This reporting method of repeatedly reporting the same CSI information causes unnecessary signaling overhead on the uplink.
  • the information reporting method provided by the embodiment of the present invention can determine whether the CSI information to be reported and the previously reported CSI information are the same before reporting the CSI information, and then report an indication to the base station to indicate whether the two are the same. logo.
  • the base station follows the CSI information previously reported by the UE as one of the basis for selecting the downlink MCS, and the UE does not need to repeat the same CSI information to the base station. Since the bit indicating the identifier is smaller than the bit of the CSI information, compared with the case where the CSI information reported by the UE in each of the reported subframes is the same as the previously reported CSI information, the CSI information to be reported may be the same as the previously reported CSI information. Avoid repeatedly reporting the same CSI information, thereby saving the signaling overhead of the uplink.
  • the embodiment of the present invention further provides a method for information reporting, which is applied to a base station side. As shown in FIG. 6, the method includes:
  • the base station receives the indication identifier of the UE on the reporting subframe.
  • the indication identifier is used to indicate whether the CSI information to be reported by the UE is the same as the CSI information reported by the UE. For example, in FIG. 1( a ), when the CSI information to be reported by the UE on the reporting subframe 2 is the same as the CSI information reported on the reporting subframe 1 , the UE cancels reporting the CSI information on the reporting subframe 2, and An indicator indicating that the two are the same is reported to the base station on the reporting subframe 2. The base station receives the indication identifier on the reporting subframe 2, and then uses the CSI information reported by the UE on the reporting subframe 1 as one of the basis for determining the MCS used in the downlink DL in the next stage.
  • the bit of the indication identifier is less than the bit of the CSI information, for example, the indication identifier may be an identifier of 1 to 4 bits, and the bit may be 0 or 1. In a preferred solution of the embodiment of the present invention, the indication identifier is a 1-bit identifier.
  • the CSI information received by the base station carries at least one indication of the CQI, the PMI, the PTI, or the RI
  • the UE identifies at least one indication carried in the CSI information to be reported and the previously reported CSI information by using a one-bit identifier.
  • the at least one indication carried in the same is the same.
  • the bit represents the CSI information to be reported and the previously reported CSI. The information is the same.
  • the CQI occupies 4 bits
  • the PMI occupies 4 bits
  • the second code word CQI or PMI occupies 3 bits
  • the PTI occupies 1 to 2 bits
  • the RI occupies 1 to 3 bits.
  • the CSI information received by the base station carries at least one CQI, that is, the CSI information received by the base station is at least 4 bits each time.
  • the indication identifier received by the base station indicates whether the successively sent CSI information is the same by the opposite two bits. For example, when the indication flag is 1, it indicates that the CSI information sent in the same manner is the same. When the indication flag is 0, the CSI information sent in sequence is different, or when the indication flag is 0, the CSI information sent in the same direction is the same. 1 means that the CSI information sent in succession is different. In the embodiment of the present invention, the indication identifier is 0, indicating that the CSI information sent in sequence is the same, and the indication identifier is 1 indicates that the CSI is sent sequentially. - - Information is not the same as an example.
  • the UE does not determine whether the CSI information to be reported is the same as the previously reported CSI information, but reports the CSI information in each reporting subframe, and the base station reports the subframe in each reporting subframe.
  • the CSI information is received once.
  • the channel change of the SCN is relatively slow, and most of the CSI information received by the base station is the same.
  • This reporting method of repeatedly receiving the same CSI information causes unnecessary signaling overhead for the uplink.
  • the method for reporting information according to the embodiment of the present invention can determine whether the CSI information to be reported and the previously reported CSI information are the same before the CSI information is reported, and then the base station receives one of the reports reported by the UE for characterizing the two. Whether the same indicator is the same.
  • the base station uses the CSI information previously reported by the UE as one of the basis for selecting the downlink MCS, and the base station does not receive the CSI information repeatedly reported by the UE. Since the bit indicating the identifier is smaller than the bit of the CSI information, the CSI information to be reported may be the same as the previously reported CSI information, as compared with the CSI information received by the base station in each of the reported subframes. It is avoided to repeatedly receive the same CSI information, thereby saving the signaling overhead of the uplink. In particular, in the scenario where the channel change of the SCN is relatively slow and the CSI information reported by the UE changes little, the uplink signaling overhead can be saved.
  • the base station when the indication identifier received by the base station indicates that the CSI information to be reported by the UE is different from the CSI information reported by the UE, the base station receives the CSI to be reported reported by the UE. The information is then used by the base station to use the CSI information reported by the UE as one of the basis for selecting the downlink MCS of the next stage.
  • the timing at which the base station receives the CSI information to be reported by the UE may be performed before the step 601, after the step 601, or simultaneously with the step 601, which is not limited by the embodiment of the present invention. It should be noted that, when the CSI information to be reported is different from the previously reported CSI information, the base station receives a 1-bit indication identifier in addition to the CSI information to be reported, compared with the prior art. The signaling overhead is one more bit than the prior art. But this does not contradict the technical problems solved.
  • the CSI information of the UE feedback channel change is small, and most of the CSI information to be reported is the same as the previously reported CSI information, so as a whole, most of the reported CSI information is In the case where the previously reported CSI information is the same, in the rare case, the effect of the multi-received 1-bit indication flag on the signaling-saving overhead is negligible.
  • the base station may first receive one or more CSI information sent by the UE, so as to provide historical CSI information that can be determined for the subsequent UE to report the CSI information.
  • the implementation manner in which the base station receives one or more CSI information sent by the UE may be one of the following three manners:
  • the base station receives one CSI information reported by the UE.
  • the UE At the beginning of reporting the CSI information, the UE first initiates an aperiodic reporting process, and reports the CSI information reflecting the current channel status to the base station.
  • the base station sends a non-periodic reporting indication to the UE, and receives the CSI information reported by the UE according to the aperiodic reporting indication.
  • the base station At the beginning of reporting the CSI information, the base station first initiates an aperiodic reporting procedure, and sends a non-periodic reporting indication to the UE, instructing the UE to report the CSI information. After receiving the aperiodic reporting indication, the UE reports one or more CSI information to the base station. In addition, the base station may also send multiple aperiodic reporting indications, such as the UE, and each time the UE receives an aperiodic reporting indication, the UE reports CSI information to the base station, where the CSI information is CSI information reflecting the current channel state when the CSI information is reported. Thus, reporting multiple CSI information to the base station is implemented.
  • the base station receives the CSI information periodically reported by the UE within a preset duration.
  • the UE performs a periodic reporting process, and periodically reports the CSI information to the base station according to the existing implementation manner.
  • the UE stops the existing periodic reporting mode, and then reports the CSI information according to the implementation shown in Figure 2.
  • the preset duration is greater than the reporting interval.
  • the preset duration may be 4 Np.
  • the UE reports the CSI information according to the implementation manner shown in FIG. 2 .
  • the preset duration may be set according to the characteristics of the channel change.
  • the channel change is slow, and each time the reported CSI information is usually the same, a shorter preset duration may be set; If the channel change in the cell scenario of the eNB is relatively large, a longer preset duration may be set.
  • the embodiment of the present invention does not limit the setting of the preset duration.
  • the UE performs a periodic reporting process, and periodically reports the CSI information to the base station according to the existing implementation manner. After the channel state is stable, multiple CSI information reported by the UE are the same. If the number of the same CSI information that the UE continuously reports exceeds the preset number, for example, more than five, the UE stops the existing periodic reporting mode, and then reports the CSI information according to the implementation manner shown in FIG. -
  • the embodiment of the present invention also does not limit the setting of the preset duration.
  • the base station receives the CSI information to be reported reported by the UE, specifically: the base station receives the report reported by the UE on the next reported subframe.
  • the CSI information is to be reported, or the base station sends an aperiodic reporting indication to the UE, and then receives the CSI information to be reported reported by the UE according to the aperiodic reporting indication, where the aperiodic reporting indication is a reporting indication sent by the base station according to the indication identifier reported by the UE.
  • the receiving, by the base station, the CSI information to be reported reported by the UE on the next reporting subframe may be the CSI information to be reported reported by the UE on the next reporting subframe adjacent to the reporting subframe that receives the reporting indication identifier.
  • the base station receives the indication identifier 1 reported by the UE on the reporting subframe 3, and then receives the CSI information to be reported reported by the UE on the reporting subframe 4, the to-be-reported The CSI information is used to prepare CSI information reported by the UE on the reporting subframe 3.
  • the base station receives the indication identifier 1 reported by the UE on the reporting subframe 3, and then receives the CSI information to be reported reported by the UE on the reporting subframe 4.
  • the reported CSI information is the CSI information of the SB2 that the UE prepares to report on the reporting subframe 3. Then, starting from the reporting subframe 5, the base station sequentially receives the indication identifiers of the SB3, WB, and SB1 reported by the UE.
  • the base station may not receive the CSI information to be reported reported by the UE on the next adjacent reporting subframe, but send a non-periodic reporting indication to the UE.
  • the base station after receiving the indication 1 of the UE, the base station sends a non-periodic reporting indication to the UE, instructing the UE to trigger an aperiodic reporting process.
  • the UE reports the CSI information to be reported to the base station.
  • the base station receives the indication flag 1 reported by the UE on the reporting subframe 3, and then receives the aperiodic report sent by the base station on a certain subframe X after reporting the subframe 3.
  • the CSI information reported on the reporting subframe 3 is prepared for the UE.
  • the UE reports the indication 1 to the base station on the reporting subframe 3, and then receives the non-transmitted by the base station in a certain subframe X subsequent to the reporting subframe 3.
  • the CSI information is for the UE to prepare the CSI information of the SB2 reported on the reporting subframe 3.
  • the receiving the CSI information to be reported reported by the UE on the next reporting subframe may also be -
  • the CSI information to be reported reported by the UE is received on the next reporting subframe corresponding to the reporting subframe of the reporting indicator.
  • the base station may be in the next reporting sub-band period corresponding to the reporting subframe corresponding to the reporting subframe that the UE reports the indication (that is, the next corresponding to the reporting subframe that receives the reporting indication identifier).
  • the neighboring sub-bands periodically report the subframes, and receive the CSI information to be reported by the UE, where the reported sub-band period includes multiple reporting subframes that report multiple sub-band CSI information at a time. For example, in FIG.
  • the reporting subframe 2 to the reporting subframe 4 are the reporting subframes of the reporting SB1, SB2, and SB3, that is, the three Nps between the reporting subframe 1 and the reporting subframe 4 constitute a sub-frame.
  • the base station receives the indication identifier 1 of the SB2(1) reported by the UE on the reporting subframe 3, and then sequentially receives the SB3 reported by the UE on the reporting subframe 4 and the reporting subframe 5.
  • the indications of (1) and SB1 (2) are 0. Where (1) represents the first subband period in the broadband period, and (2) represents the second subband period in the broadband period.
  • the base station On the reporting subframe 6 (the subframe is reported in the second sub-band period of SB2), the base station receives the CSI information of the SB2(1) reported by the UE, and then sequentially receives the reported by the UE on the reporting subframe 7 and the reporting subframe 8. SB3 (2) and the indication ID 1 of the WB of the second wideband period, sequentially receiving the indication flags 0 of SB1(1) and SB2(1) of the second wideband period reported by the UE on the reporting subframe 9 and the reporting subframe 10. . On the reporting subframe 11 (the first sub-band period reporting subframe of the SB3), the base station receives the CSI information of the first broadband period SB3 (2) reported by the UE, and reports the reporting of the third broadband period of the WB. The CSI information of the WB of the second wideband period reported by the UE is received on the subframe, and so on.
  • the base station may also be in the next reporting interval of the reporting subframe corresponding to the reporting subframe that is reported by the UE in the next reporting broadband period (ie, corresponding to the reporting subframe that receives the reporting indication identifier).
  • a neighboring reporting broadband period reporting subframe receives the CSI information to be reported reported by the UE, and the reporting broadband period includes a reporting subframe that reports the wideband CSI information and a reporting subframe of the multiple subband periods. For example, in FIG.
  • the reporting subframe 1 to the reporting subframe 7 are sequentially reported as WB, SB1 (1), SB2 (1), SB3 (1), SB1 (2), SB2 (2), and SB3 (
  • the upper 4 subframes of 2) that is, the upper N1 subframes to the upper 7 subframes of the sub-frame 7 constitute a broadband period.
  • the base station sequentially receives the WB, SB1 (1), SB2 (1), SB3 (1), SB1 (2), and SB2 reported by the UE on the reporting subframes 1 to 7. 2) and SB3 (2) indicate that the indications are 0, 0, 1, 0, 0, 0, and 1, in which the indications of SB2 (1) and SB3 (2) are received on the reported subframe 3 and the reported subframe 7 respectively.
  • Mark 1 the indications are 0, 0, 1, 0, 0, 0, and 1, in which the indications of SB2 (1) and SB3 (2) are received on the reported subframe 3 and the reported subframe 7 respectively.
  • the base station On the reporting subframes reporting SB2 (1) (upper subframe 10) and SB3 (2) (up reporting subframe 14) in the second wideband period, the base station will respectively receive SB2 (1) in the first wideband period reported by the UE. And SB3 (2) - - CSI information.
  • the indication identifier occupies 2 bits, wherein one bit represents whether the CQI in the CSI information to be reported is the same as the CQI in the previously reported CSI information. The other bit represents whether the PMI in the CSI information to be reported is the same as the PMI in the previously reported CSI information. If the CQI and the PMI in the CSI information to be reported are different from the CQI and the PMI in the previously reported CSI information, after reporting the indication identifier 11, the base station receives the CQI and the PMI in the CSI information to be reported reported reported by the UE.
  • the base station After receiving the indication identifier 10 or 01 reported by the UE, the base station receives the CSI information reported by the UE.
  • the CQI and the PMI in the CSI information to be reported reported by the UE are received by the base station.
  • the broadband reporting mode is taken as an example.
  • the base station receives the indication identifier 00 reported by the UE, where the first 0 is an indication identifier of the CQI, indicating that the CQI to be reported is The previously reported CQI is the same; the second 0 is the indication of the PMI, indicating that the PMI to be reported this time is the same as the previously reported PMI.
  • the base station receives the indication identifier 10 reported by the UE, where the first one is the indication identifier of the CQI, indicating that the CQI to be reported is not the same as the previously reported CQI; the second 0 is the indication identifier of the PMI.
  • the base station receives the indication identifier 11 reported by the UE, where the first one is the indication identifier of the CQI, indicating that the CQI to be reported is the same as the previously reported CQI; the second one is the indication identifier of the PMI. Indicates that the PMI to be reported this time is different from the previously reported PMI.
  • the base station receives the report reported by the UE in the next adjacent reporting subframe (for example, the reporting subframe 6 in FIG. 5) or through the aperiodic reporting.
  • CQI and PMI to be reported (reported CQI and PMI to be reported on subframe 5); when the content reported by the UE is 10, in the next adjacent reported subframe (for example, the reported subframe 4 in FIG. 5) or
  • the non-periodic reporting indicates that the signaling overhead of the current uplink to be reported by the UE is received, and the base station may also receive only the indication reported by the UE that is different from the previously reported. For example, in FIG. 5, if the reporting subframe 3 reports 10, the base station only receives the CQI to be reported by the UE on the reporting subframe 3 in the reporting subframe 4, and does not receive the PMI to be reported by the UE in the reporting subframe 3. .
  • the CSI information includes two indications as an example. In practical applications, the CSI information is used.
  • the indication flag indicating that the UE can report a few bits is included, and then one or all of the indications to be reported are reported according to the multi-bit indication indication, which is not described in detail in the embodiment of the present invention.
  • FIG. 5 illustrates the multi-bit indication flag reported by the UE in the broadband reporting mode.
  • the base station may also receive the multi-bit indication flag reported by the UE according to the same reporting manner, and details are not described herein again.
  • the broadband reporting mode can be mode 1-0 and model-1
  • the frequency selection reporting mode can be mode2-0 and mode2-l.
  • the base station does not receive the PMI.
  • the base station may receive the CSI information reported by the UE according to the reporting mode shown in FIG. 3 or FIG. 4.
  • the base station receives the CQI and the PMI reported by the UE.
  • the base station can receive the CSI information reported by the UE according to the reporting mode shown in FIG.
  • the base station may further send a new mode indication signaling to the UE, where the new mode indication signaling is used to indicate that the UE reports the CSI information to the base station according to the reporting manner shown in FIG.
  • the UE Before transmitting the new mode indication signaling to the UE, the UE reports the CSI information to the base station according to the existing reporting manner. After the base station sends the new mode indication signaling to the UE, the UE reports the CSI information according to the reporting manner shown in FIG. 2 .
  • the UE does not determine whether the CSI information to be reported is the same as the previously reported CSI information, but reports the CSI information in each reporting subframe, and the base station reports the subframe in each reporting subframe.
  • the CSI information is received once.
  • the channel change of the SCN is relatively slow, and most of the CSI information received by the base station is the same.
  • This reporting method of repeatedly receiving the same CSI information causes unnecessary signaling overhead on the uplink.
  • the method for reporting information according to the embodiment of the present invention can determine whether the CSI information to be reported and the previously reported CSI information are the same before the CSI information is reported, and then the base station receives one of the reports reported by the UE for characterizing the two. Whether the same indicator is the same.
  • the base station When the CSI information to be reported is the same as the previously reported CSI information, the base station follows the CSI information reported by the UE as one of the basis for selecting the downlink MCS, and the base station does not receive the CSI information repeatedly reported by the UE. Since the bit indicating the identifier is smaller than the bit of the CSI information, the CSI information to be reported may be the same as the previously reported CSI information, as compared with the CSI information received by the base station in each of the reported subframes. It is avoided to repeatedly receive the same CSI information, thereby saving the signaling overhead of the uplink. In particular, the channel change of the SCN under the coverage of the Pico eNB is relatively slow, and the CSI reported by the UE is relatively slow. - - The scenario where the information changes more than 'j, can save a lot of uplink signaling overhead.
  • the embodiment of the present invention describes the scenario of the SCN based on the coverage of the Pico eNB.
  • the method for reporting information according to the embodiment of the present invention is also applicable to the scenario of the coverage under the coverage of the Macro eNB.
  • an embodiment of the present invention further provides a user equipment UE for implementing the method shown in FIG. 2.
  • the user equipment includes: an information unit 71, a determining unit 72, an identifier reporting unit 73, and a receiving unit 74, where
  • the information reporting unit 71 is configured to report CSI information to the base station during the process of periodically reporting the channel state information CSI;
  • the determining unit 72 is configured to determine whether the CSI information to be reported is the same as the CSI information previously reported by the information reporting unit 71, to obtain a determination result;
  • the identifier reporting unit 73 is configured to report an indication identifier to the base station in the reporting subframe according to the determination result of the determining unit 72, where the indication identifier is used to represent the CSI information to be reported and the previously reported CSI information. Whether they are the same, wherein the bit of the indication identifier is less than the bit of the CSI information.
  • the CSI information to be reported is different from the previously reported CSI information, the CSI information to be reported is reported to the base station.
  • the information reporting unit 71 is further configured to: when the CSI information is not reported before the current CSI information is reported:
  • the CSI information is periodically reported to the base station, and when the number of the same CSI information reported exceeds the preset number, the CSI information is periodically reported.
  • the determining unit 72 specifically includes:
  • a first determining sub-unit 81 configured to determine whether the CSI information to be reported is completely equal to the previously reported CSI information, and if the determination result is yes, determining the CSI information to be reported and the previously reported CSI information The CSI information is the same, otherwise it is not the same; - a second determining sub-unit 82, configured to determine whether a difference between the CSI information to be reported and the previously reported CSI information exceeds a preset threshold, and if the determination result is no, determine the to-be-reported The CSI information is the same as the previously reported CSI information, otherwise it is different.
  • the information reporting unit 71 specifically includes:
  • the first reporting sub-unit 83 is configured to report the CSI information to be reported to the base station on a next reporting subframe.
  • the second reporting sub-unit 84 is configured to receive the aperiodic reporting indication sent by the base station, and report the CSI information to be reported to the base station according to the aperiodic reporting indication.
  • the first reporting sub-unit 83 is specifically configured to: in the frequency selective reporting mode, report the CSI to be reported to the base station in a next reporting subframe adjacent to the reporting subframe Information
  • the CSI information to be reported is reported to the base station in the next reporting subframe corresponding to the reported sub-frame, and the sub-band reporting period includes reporting multiple sub-subjects. Multiple reporting subframes with CSI information;
  • the broadband reporting period includes a reporting of the wideband CSI information, in the next adjacent broadband reporting period, the next reporting subframe corresponding to the reporting subframe The reporting subframe and the reporting subframe of the multiple sub-band reporting period.
  • the CSI information reported by the information reporting unit 71 is any one of the following indications or a combination of at least two indications:
  • Channel quality indication CQI Channel quality indication CQI, precoding matrix indication PMI, precoding type indication PTI and rank indication
  • the indication identifier reported by the identifier reporting unit 73 occupies at least one bit
  • the bit reported by the identifier reporting unit 73 is 0, indicating that at least one of the CSI information to be reported is the same as the indication of at least one of the previously reported CSI information, and the bit is 1 indicating the CSI information to be reported. At least one of the indications is different from at least one of the previously reported CSI information;
  • the bit reported by the identifier reporting unit 73 is 1 indicating that at least one of the CSI information to be reported is the same as the indication of at least one of the previously reported CSI information, where the bit is 0. - At least one of the CSI information to be reported is not the same as the at least one of the previously reported CSI information.
  • the identifier upper unit 73 is further configured to: when the CSI information is a combination of CQI and PMI, the reported indication identifier is occupied by 2 bits, where one bit is used to represent the CSI to be reported. Whether the CQI in the information is the same as the CQI in the previously reported CSI information, and the other bit is used to indicate whether the PMI in the CSI information to be reported is the same as the PMI in the previously reported CSI information;
  • the information reporting unit 71 is specifically configured to:
  • the CQI and the PMI in the CSI information to be reported are different from the CQI and the PMI in the previously reported CSI information, the CQI and the PMI in the CSI information to be reported are reported to the base station;
  • the base station reports a different to-be-reported indication in the previously reported CSI information, or Both the CQI and the PMI in the CSI information to be reported are reported to the base station.
  • the receiving unit 74 is configured to receive, after the determining unit 72 determines whether the CSI information to be reported is the same as the CSI information reported by the information reporting unit, the new mode indication signaling sent by the base station, the new The mode indication signaling is used to instruct the user equipment to report the indication identifier according to the method shown in FIG. 2.
  • the user equipment provided by the embodiment of the present invention can determine whether the CSI information to be reported and the previously reported CSI information are the same before reporting the CSI information, and then report to the base station an indication identifier for indicating whether the two are the same.
  • the base station follows the CSI information reported by the UE as one of the basis for selecting the downlink MCS, and the UE does not need to repeatedly report the same CSI information to the base station. If the bit of the indication identifier is smaller than the bit of the CSI information, the UE may report the CSI information to be reported in the same manner as the previously reported CSI information. Avoid repeatedly reporting the same CSI information, thereby saving uplink signaling overhead. In particular, in the scenario where the channel change of the SCN under the Pico eNB is relatively slow and the CSI information reported by the UE changes little, a large amount of uplink signaling overhead can be saved.
  • the embodiment of the present invention further provides a base station for implementing the method shown in FIG. 6.
  • the base station includes: an identifier receiving unit 91, an information receiving unit 92, an indication transmitting unit 93, and a mode switching indicating unit 94, where
  • the identifier receiving unit 91 is configured to receive, in the process of periodically reporting the channel state information CSI, the indication identifier that is reported by the UE, where the indication identifier is used to represent the CSI information to be reported by the UE. Whether the CSI information reported by the UE is the same, and the bit of the indication identifier is less than the bit of the CSI information.
  • the information receiving unit 92 is configured to: when the indication identifier received by the identifier receiving unit 91 indicates that the CSI information to be reported is different from the previously reported CSI information, receive the CSI information to be reported.
  • the information receiving unit 92 is further configured to: receive the CSI information reported by the UE at the beginning of the reporting of the CSI information by the UE;
  • the indication sending unit 93 is configured to send an aperiodic reporting indication to the UE at the beginning of reporting the CSI information by the UE, where the information receiving unit 92 is further configured to receive, by the UE, the reporting according to the aperiodic reporting indication.
  • CSI information ;
  • the information receiving unit 92 is further configured to: when the UE reports the CSI information, receive CSI information that is periodically reported by the UE within a preset duration.
  • the information receiving unit 92 is specifically configured to:
  • the indication sending unit 93 is further configured to send a non-periodic reporting indication to the UE.
  • the information receiving unit 92 is further configured to receive the CSI information to be reported reported by the UE according to the aperiodic reporting indication.
  • the information receiving unit 92 specifically includes:
  • the first receiving subunit 1001 is configured to receive the CSI information to be reported reported by the UE, on a next reporting subframe that is adjacent to the reported subframe.
  • the second receiving sub-unit 1002 is configured to receive the CSI information to be reported reported by the UE, in a next reporting sub-frame corresponding to the reporting sub-frame in a next adjacent sub-band reporting period.
  • the sub-band reporting period includes multiple reporting subframes that report multiple sub-band CSI information at a time;
  • the third receiving sub-unit 1003 configured to receive the CSI information to be reported reported by the UE, in the next reporting subframe corresponding to the reporting subframe, in the next adjacent broadband reporting period,
  • the broadband reporting period includes a reporting subframe that reports wideband CSI information and a reporting subframe that reports multiple subband reporting periods.
  • the CSI information received by the information receiving unit 92 is any one of the following indications or a combination of at least two indications:
  • Channel quality indication CQI Channel quality indication CQI, precoding matrix indication PMI, precoding type indication PTI and rank indication
  • the indication identifier received by the identifier receiving unit 91 occupies at least one bit
  • the bit received by the identifier receiving unit 91 is 0, indicating that at least one of the CSI information to be reported is the same as the indication of at least one of the previously reported CSI information, and the bit is 1 indicating the CSI information to be reported. At least one of the indications is different from at least one of the previously reported CSI information;
  • the bit received by the identifier receiving unit 91 is 1 indicating that at least one of the CSI information to be reported is the same as the indication of at least one of the previously reported CSI information, and the bit is 0, indicating the CSI information to be reported. At least one of the indications is different from at least one of the previously reported CSI information.
  • the indication identifier received by the identifier receiving unit 91 occupies 2 bits, wherein one bit is used to represent the CQI in the CSI information to be reported and the previous report. Whether the CQI in the CSI information is the same, and the other bit is used to indicate whether the PMI in the CSI information to be reported is the same as the PMI in the previously reported CSI information;
  • the information receiving unit 92 is specifically configured to:
  • the CQI and the PMI in the CSI information to be reported reported by the UE are received;
  • the to-be-reported indication that is different from the previously reported CSI information reported by the UE is received, or Receiving the CQI and the PML to be reported in the CSI information to be reported reported by the UE
  • the mode switching indication unit 94 is configured to send, by the identifier receiving unit 91, new mode indication signaling to the UE, before the reporting subframe receives the indication identifier reported by the UE, where the new mode indication signaling is used.
  • the UE is instructed to report CSI information according to the method shown in FIG. 2.
  • the base station provided by the embodiment of the present invention can report the current to be reported by the UE before reporting the CSI information. - -
  • the CSI information is judged whether the CSI information is the same as the previously reported CSI information, and then the base station receives an indication flag that is reported by the UE to indicate whether the two are the same.
  • the base station uses the CSI information previously reported by the UE as one of the basis for selecting the downlink MCS, and the base station does not receive the CSI information repeatedly reported by the UE. Since the bit indicating the identifier is smaller than the bit of the CSI information, the CSI information to be reported may be the same as the previously reported CSI information, as compared with the CSI information received by the base station in each of the reported subframes.
  • the uplink signaling overhead can be saved.
  • the embodiment of the present invention further provides a system for information reporting.
  • the system includes a user equipment UE1101 and a base station 1102.
  • the UE 1101 is a user equipment shown in FIG. 7 or FIG. 8
  • the base station 1102 is a base station shown in FIG. 9 or FIG. among them:
  • the UE 1101 is configured to: when the channel state information CSI is periodically reported, determine whether the CSI information to be reported is the same as the previously reported CSI information, to obtain a determination result, and report the indication identifier to the base station 1102 according to the determination result;
  • the base station 1102 is configured to receive, by using the reporting subframe, an indication identifier that is reported by the UE1101, where the indication identifier is used to indicate whether the CSI information to be reported by the UE1101 is the same as the CSI information reported by the UE1101.
  • the bit of the indication identifier is less than the bit of the CSI information.
  • the system for reporting information can determine whether the CSI information to be reported and the previously reported CSI information are the same before the CSI information is reported, and then report a signal to the base station to indicate whether the two are the same. Indication indicator.
  • the base station follows the CSI information reported by the UE as one of the basis for selecting the downlink MCS, and the UE does not need to repeatedly report the same CSI information to the base station. If the bit of the indication identifier is smaller than the bit of the CSI information, the UE may report the CSI information to be reported in the same manner as the previously reported CSI information. Avoid repeatedly reporting the same CSI information, thereby saving uplink signaling overhead. In particular, in the scenario where the channel change of the SCN is relatively slow and the CSI information reported by the UE changes little, the uplink signaling overhead can be saved.
  • an embodiment of the present invention further provides a user equipment UE, which is used to - - Implement the method shown in Figure 2.
  • the user equipment includes: a transmitter 1201, a processor 1202, and a receiver 1203, where
  • the transmitter 1201 is configured to report CSI information to the base station in the process of periodically reporting the channel state information CSI;
  • the processor 1202 is configured to determine whether the CSI information to be reported is the same as the CSI information previously reported by the transmitter 1201, to obtain a determination result;
  • the transmitter 1201 is further configured to report, according to the judgment result of the processor 1202, the indication identifier to the base station in the reporting subframe, where the indication identifier is used to represent whether the CSI information to be reported and the previously reported CSI information are The same, where the bit of the indication identifier is less than the bit of the CSI information.
  • the transmitter 1201 is further configured to: when the result of the determining by the processor 1202 is that the CSI information to be reported is different from the previously reported CSI information, report the to the base station Reported CSI information.
  • the transmitter 1201 is further configured to: when the CSI information is not reported before the current CSI information is reported:
  • the CSI information is periodically reported to the base station, and when the number of the same CSI information reported exceeds the preset number, the CSI information is periodically reported.
  • processor 1202 is specifically configured to:
  • the transmitter 1201 is specifically configured to:
  • Reporting the CSI information to be reported to the base station on a next reporting subframe Receiving the aperiodic reporting indication sent by the base station, and reporting the CSI information to be reported to the base station according to the aperiodic reporting indication.
  • the transmitter 1201 is specifically configured to perform the frequency selection in the 4 ⁇ mode:
  • the CSI information to be reported is reported to the base station on the next upper 4 ⁇ subframe corresponding to the above-mentioned upper subframe, in the next adjacent sub-band period, the
  • the sub-band reporting period includes multiple reporting subframes that report multiple sub-band CSI information at a time;
  • the broadband reporting period includes one, in a next adjacent uplink uplink period, on a next uplink subframe corresponding to the upper subframe,
  • the reporting subframe of the wideband CSI information and the reporting subframe of the multiple subband reporting period are reported.
  • the CSI information reported by the transmitter 1201 is any one of the following indications or a combination of at least two indications:
  • Channel quality indication CQI Channel quality indication CQI, precoding matrix indication PMI, precoding type indication PTI and rank indication RI.
  • the indication identifier reported by the transmitter 1201 occupies at least one bit; the bit reported by the transmitter 1201 is 0, indicating that at least one of the CSI information to be reported indicates the previously reported CSI information. At least one of the indications is the same, the bit being 1 indicates that at least one of the CSI information to be reported is different from the indication of at least one of the previously reported CSI information;
  • the bit reported by the transmitter 1201 is 1 indicating that at least one of the CSI information to be reported is the same as the indication of at least one of the previously reported CSI information, where the bit is 0, indicating that the CSI information to be reported is in the CSI information.
  • the at least one indication is not the same as the at least one of the previously reported CSI information.
  • the transmitter 1201 is further configured to: when the CSI information is a combination of a CQI and a PMI, the reported indication identifier occupies 2 bits, where one bit is used to represent the CSI information to be reported. Whether the CQI is the same as the CQI in the previously reported CSI information, and the other bit is used to indicate whether the PMI in the CSI information to be reported is the same as the PMI in the previously reported CSI information;
  • the CQI and the PMI in the CSI information to be reported are reported to the base station;
  • the base station reports a different to-be-reported indication in the previously reported CSI information, or Both the CQI and the PMI in the CSI information to be reported are reported to the base station.
  • the receiver 1203 is configured to receive, after the processor 1202 determines whether the CSI information to be reported is the same as the CSI information reported by the transmitter 1201, the new mode indication signaling sent by the base station, the new The mode indication signaling is used to instruct the user equipment to report the CSI information according to the method shown in FIG. 2.
  • the user equipment provided by the embodiment of the present invention can determine whether the CSI information to be reported and the previously reported CSI information are the same before reporting the CSI information, and then report to the base station an indication identifier for indicating whether the two are the same.
  • the base station follows the CSI information reported by the UE as one of the basis for selecting the downlink MCS, and the UE does not need to repeatedly report the same CSI information to the base station. If the bit of the indication identifier is smaller than the bit of the CSI information, the UE may report the CSI information to be reported in the same manner as the previously reported CSI information. Avoid repeatedly reporting the same CSI information, thereby saving uplink signaling overhead. In particular, in the scenario where the channel change of the SCN under the Pico eNB is relatively slow and the CSI information reported by the UE changes little, a large amount of uplink signaling overhead can be saved.
  • the embodiment of the present invention further provides a base station for implementing the method shown in FIG. 6.
  • the base station includes: a receiver 1301 and a transmitter 1302, wherein the receiver 1301 is configured to receive an indication reported by the UE on the reporting subframe in the process of periodically reporting the channel state information CSI.
  • the identifier is used to indicate whether the CSI information to be reported by the UE is the same as the CSI information that is previously reported by the UE, where the bit of the indication identifier is less than the bit of the CSI information.
  • the receiver 1301 is configured to: when the received indication identifier indicates that the CSI information to be reported is different from the previously reported CSI information, receive the CSI information to be reported reported by the UE.
  • the receiver 1301 is further configured to: receive, by the UE, a CSI information reported by the UE at the beginning of reporting the CSI information;
  • the transmitter 1302 is configured to send a non-periodic reporting indication to the UE at the beginning of reporting the CSI information by the UE, where the receiver 1301 is further configured to receive, by the UE, the reporting according to the aperiodic reporting indication.
  • CSI information ;
  • the receiver 1301 is further configured to: when the UE reports the CSI information, receive CSI information periodically reported by the UE within a preset duration.
  • receiver 1301 is specifically configured to:
  • the CSI information to be reported that is reported by the UE is received on the next reporting subframe; the sender 1302 is further configured to send a non-periodic reporting indication to the UE.
  • the receiver 1301 is further configured to receive the CSI information to be reported reported by the UE according to the aperiodic reporting indication.
  • receiver 1301 is specifically configured to:
  • the sub-band reporting period includes reporting more than once Multiple sub-frames with CSI information
  • the broadband reporting period includes a reporting broadband CSI information, in the next reporting subframe corresponding to the reporting subframe.
  • the CSI information received by the receiver 1301 is any one of the following indications or a combination of at least two indications:
  • Channel quality indication CQI Channel quality indication CQI, precoding matrix indication PMI, precoding type indication PTI and rank indication
  • the indication identifier received by the receiver 1301 occupies at least one bit; the bit received by the receiver 1301 is 0, indicating at least one of the CSI information to be reported and the previously reported CSI information. At least one of the indications is the same, the bit being 1 indicates that at least one of the CSI information to be reported is different from the indication of at least one of the previously reported CSI information;
  • the bit received by the receiver 1301 is 1 and represents at least one of the CSI information to be reported.
  • the indication is the same as the indication of at least one of the previously reported CSI information, the bit being 0 indicates that at least one of the CSI information to be reported indicates that the indication is not the same as the at least one of the previously reported CSI information.
  • the indication identifier received by the receiver 1301 occupies 2 bits, where one bit is used to represent the CQI in the CSI information to be reported and the previously reported Whether the CQI in the CSI information is the same, and another bit is used to indicate whether the PMI in the CSI information to be reported is the same as the PMI in the previously reported CSI information;
  • the receiver 1301 is specifically configured to:
  • the CQI and the PMI in the CSI information to be reported are different from the CQI and the PMI in the previously reported CSI information, the CQI and the PMI in the CSI information to be reported reported by the UE are received;
  • the to-be-reported indication that is different from the previously reported CSI information reported by the UE is received, or Receiving the CQI and the PML to be reported in the CSI information to be reported reported by the UE
  • the transmitter 1302 is further configured to: before the receiver 1301 receives the indication identifier reported by the UE, send the new mode indication signaling to the UE, where the new mode indication signaling is used to indicate that the UE according to FIG. 2
  • the method shown is " ⁇ CSI information.
  • the base station provided by the embodiment of the present invention can determine whether the CSI information to be reported and the previously reported CSI information are the same before the reporting of the CSI information, and then the base station receives a report reported by the UE to indicate whether the two are the same. Indicates the identity.
  • the base station uses the CSI information previously reported by the UE as one of the basis for selecting the downlink MCS, and the base station does not receive the CSI information repeatedly reported by the UE.
  • the CSI information to be reported may be the same as the previously reported CSI information, as compared with the CSI information received by the base station in each of the reported subframes. It is avoided to repeatedly receive the same CSI information, thereby saving the signaling overhead of the uplink. In particular, in the scenario where the channel change of the SCN is relatively slow and the CSI information reported by the UE changes little, the uplink signaling overhead can be saved.
  • the embodiment of the present invention further provides a system for information reporting.
  • the system includes a user equipment UE1401 and a base station 1402, and the UE 1401 is in FIG. -
  • the user equipment shown, the base station 1402 is the base station shown in FIG. among them:
  • the UE 1401 is configured to: during the process of periodically reporting the channel state information CSI, determine whether the CSI information to be reported is the same as the previously reported CSI information, to obtain a determination result, and report the indication identifier to the base station 1402 according to the determination result;
  • the base station 1402 is configured to receive, by using the reporting subframe, the indication identifier that is reported by the UE 1401, where the indication identifier is used to indicate whether the CSI information to be reported by the UE 1401 is the same as the CSI information previously reported by the UE 1401, where The bit of the indication identifier is less than the bit of the CSI information.
  • the system for reporting information can determine whether the CSI information to be reported and the previously reported CSI information are the same before the CSI information is reported, and then report a signal to the base station to indicate whether the two are the same. Indication indicator.
  • the base station follows the CSI information reported by the UE as one of the basis for selecting the downlink MCS, and the UE does not need to repeatedly report the same CSI information to the base station. If the bit of the indication identifier is smaller than the bit of the CSI information, the UE may report the CSI information to be reported in the same manner as the previously reported CSI information. Avoid repeatedly reporting the same CSI information, thereby saving uplink signaling overhead. In particular, in the scenario where the channel change of the SCN is relatively slow and the CSI information reported by the UE changes little, the uplink signaling overhead can be saved.
  • the present invention can be implemented by means of software plus necessary general hardware, and of course, can also be through hardware, but in many cases the former is a better implementation. .
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
  • a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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Abstract

本发明公开了一种信息上报的方法、用户设备、基站及系统,涉及无线通信领域,能够节省UE上报CSI信息时的上行链路信令开销。本发明的方法包括:在周期性上报信道状态信息CSI的过程中,用户设备UE判断待上报的CSI信息与此前上报的CSI信息是否相同,以得到判断结果;根据判断结果在上报子帧向基站上报指示标识,所述指示标识用于表征所述待上报的CSI信息与所述此前上报的CSI信息是否相同,其中,所述指示标识的比特位少于CSI信息的比特位。

Description

一 一
信息上报的方法、 用户设备、 基站及系统
本申请要求于 2013 年 01 月 15 日提交中国专利局、 申请号为 201310014427.2、 发明名称为 "信息上 ·^艮的方法、 用户设备、 基站及系统" 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,尤其涉及一种信息上报的方法、用户设备、 基站及系统 背景技术
先进的长期演进 Rel-10/l 1/12 ( Long Term Evolution-Advance , 筒称 LTE-A ) 的 Rel-10/11/12技术版本是对 LTE Rel-8/9技术版本的增强, LTE-A系统具有比 LTE系统更高的带宽要求, 支持高达 1G的峰值数据速率。 在 LTE-A Rel-12版本 中, 针对热点区域的增强成为一个热门课题。 热点区域包括室内和室外场景, 由多个低功率的微演进基站(Pico eNodeB, 筒称 Pico eNB )覆盖形成多个小 小区网络 (Small Cell Network, 筒称 SCN)。 室内的 Pico eNB只支持低速移动的 用户设备 ( User Equipment , 筒称 UE ) , 室外的 Pico eNB除了要支持低速移动 的 UE以外还要支持中速移动的 UE, 两种 Pico eNB都不支持高速移动的 UE。 通 常, 移动速度在 0km/h- 15km/h之间称为低速移动, 移动速度在 15km/h-60km/h 之间称为中速移动, 移动速度在 60km/h以上称为高速移动。
在 LTE-A系统的下行链路( Down Link , 筒称 DL )传输中, 为了辅助演进 式基站( eNodeB, 筒称 eNB )选择合适的调制编码方式( Modulation and Coding Scheme, 筒称 MCS ), 例如采用正交相移键控 ( Quadrature Phase-Shift Keying, 筒称 QPSK ) , 16正交幅度调制( Quadrature Amplitude Modulation , 筒称 QAM ) 或 64QAM, 以及采用何种码率, UE需要通过上行链路 ( Up Link, 筒称 UL ) 向 eNB反馈一些信道状态信息( Channel State Information, 筒称 CSI )» CSI包括 信道质量指示 (Channel Quality Indicator , 筒称 CQI )、 预编码矩阵指示 ( Precoding Matrix Indicator, 筒称 PMI )、 预编码类型指示 ( Precoding Type Indication, 筒称 PTI )和秩指示 (Rank Indicator, 筒称 RI )等。 eNB根据接收 - - 到的 CSI反馈信息确定下行 DL所使用的 MCS , 从而实现自适应调制编码 (Adaptive Modulation and Coding,筒称 AMC)。
UE上报 CSI信息的方式包括非周期性上报和周期性上报两种。 其中, 在周 期性上报方式中, UE按照预设的时长间隔向 eNB周期性发送 CSI信息; 在非周 期性上报方式中, UE接收 eNB发送的 CSI上报触发指示, 根据该指示向 eNB发 送 CSI信息。 其中非周期性上报 CSI信息是对周期性上报 CSI信息的补充。
在上述 UE向 eNB上报 CSI信息的过程中, 由于 Pico eNB只支持低速移动或 中速移动的 UE , 所以与宏演进基站( Macro eNodeB , 筒称 Macro eNB )相比, SCN的信道变化相对较慢, UE反馈信道变化的 CSI信息变化较小。 因此如果采 用上述周期性上报 CSI信息的方式, 上行信令开销较大, 存在优化的空间。 发明内容
本发明实施例提供一种信息上报的方法、 用户设备、基站及系统, 能够节 省 UE上报 CSI信息时的上行链路信令开销。
第一方面, 本发明实施例提供了一种信息上报的方法, 包括:
在周期性上报信道状态信息 CSI的过程中, 用户设备 UE判断待上报的 CSI 信息与此前上报的 CSI信息是否相同, 以得到判断结果;
根据判断结果在上报子帧向基站上报指示标识,所述指示标识用于表征所 述待上报的 CSI信息与所述此前上报的 CSI信息是否相同,其中,所述指示标识 的比特位少于 CSI信息的比特位。
在所述第一方面的第一种可能的实现方式中,当所述判断结果为所述待上 报的 CSI信息与所述此前上报的 CSI信息不相同时,向所述基站上报所述待上报 的 CSI信息。
在所述第一方面或所述第一方面的第一种可能的实现方式中,还提供了所 述第一方面的第二种可能的实现方式,在所述第一方面的第二种可能的实现方 式中, 所述 UE判断待上报的 CSI信息与此前上报的 CSI信息是否相同, 具体包 括:
判断所述待上报的 CSI信息与所述此前上报的 CSI信息是否完全相等,如果 判断结果为是, 则确定所述待上报的 CSI信息与所述此前上报的 CSI信息相同, - - 否则不相同;
或者,判断所述待上报的 CSI信息与所述此前上报的 CSI信息之间的差值是 否超过预设阈值, 如果判断结果为否, 则确定所述待上报的 CSI信息与所述此 前上报的 CSI信息相同, 否则不相同。
在所述第一方面或所述第一方面的第一种可能或第二种可能的实现方式 中,还提供了所述第一方面的第三种可能的实现方式,在所述第一方面的第三 种可能的实现方式中,所述向所述基站上报所述待上报的 CSI信息,具体包括: 在下一个上报子帧上向所述基站上报所述待上报的 CSI信息;
或者,接收所述基站发送的非周期上报指示,根据所述非周期上报指示向 所述基站上报所述待上报的 CSI信息。
在所述第一方面或所述第一方面的第一种可能、第二种可能或第三种可能 的实现方式中,还提供了所述第一方面的第四种可能的实现方式,在所述第一 方面的第四种可能的实现方式中,在频选上报模式下, 所述在下一个上报子帧 上向所述基站上报所述待上报的 CSI信息, 具体包括:
在与所述上报子帧相邻的下一个上报子帧上,向所述基站上报所述待上报 的 CSI信息;
或者,在下一个相邻的子带上 ·^艮周期中, 与所述上 子帧对应的下一个上 报子帧上, 向所述基站上报所述待上报的 CSI信息, 所述子带上报周期包含上 报多个子带 CSI信息的多个上报子帧;
或者,在下一个相邻的宽带上 ·^艮周期中, 与所述上 子帧对应的下一个上 报子帧上, 向所述基站上报所述待上报的 CSI信息, 所述宽带上报周期包含一 个上报宽带 CSI信息的上报子帧以及多个子带上报周期。
在所述第一方面或所述第一方面的第一种可能、第二种可能、第三种可能 或第四种可能的实现方式中, 还提供了所述第一方面的第五种可能的实现方 式, 在所述第一方面的第五种可能的实现方式中, 所述 CSI信息为下述任意一 种指示或至少两种指示的组合:
信道质量指示 CQI、 预编码矩阵指示 PMI、 预编码类型指示 PTI和秩指示
RI。
在所述第一方面或所述第一方面的第一种可能、第二种可能、第三种可能、 - - 第四种可能或第五种可能的实现方式中,还提供了所述第一方面的第六种可能 的实现方式,在所述第一方面的第六种可能的实现方式中, 所述指示标识占用 至少一个比特位;
所述比特位为 0表示待上报的 CSI信息中的至少一个指示与此前上报的 CSI 信息中的至少一个指示相同,所述比特位为 1表示待上报的 CSI信息中的至少一 个指示与此前上报的 CSI信息中的至少一个指示不相同;
或者,所述比特位为 1表示待上报的 CSI信息中的至少一个指示与此前上报 的 CSI信息中的至少一个指示相同, 所述比特位为 0表示待上报的 CSI信息中的 至少一个指示与此前上 ·^艮的 CSI信息中的至少一个指示不相同。
在所述第一方面或所述第一方面的第一种可能、第二种可能、第三种可能、 第四种可能、第五种可能或第六种可能的实现方式中,还提供了所述第一方面 的第七种可能的实现方式,在所述第一方面的第七种可能的实现方式中, 当所 述 CSI信息为 CQI和 PMI的组合时, 所述指示标识占用 2个比特位, 其中一个比 特位用于表征待上报的 CSI信息中的 CQI与此前上报的 CSI信息中的 CQI是否相 同,另一个比特位用于表征待上报的 CSI信息中的 PMI与此前上报的 CSI信息中 的 PMI是否相同;
所述向所述基站上报所述待上报的 CSI信息, 具体包括:
如果待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI和 PMI不相同, 则向所述基站上报待上报的 CSI信息中的 CQI和 PMI;
如果待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信息 中的 CQI或 PMI不相同,则向所述基站上报与此前上报的 CSI信息中不同的待上 报指示, 或者将待上报的 CSI信息中的 CQI和 PMI均上报给所述基站。
在所述第一方面或所述第一方面的第一种可能、第二种可能、第三种可能、 第四种可能、 第五种可能、 第六种可能或第七种可能的实现方式中, 还提供了 所述第一方面的第八种可能的实现方式,在所述第一方面的第八种可能的实现 方式中, 在所述用户设备 UE判断待上报的 CSI信息与此前上报的 CSI信息是否 相同之前, 所述方法进一步包括:
接收所述基站发送的新模式指示信令,所述新模式指示信令用于指示所述 UE按照所述第一方面所述的方法上报 CSI信息。 第二方面, 本发明实施例提供了一种信息上报的方法, 包括: 在周期性上报信道状态信息 CSI的过程中, 基站在上报子帧上接收用户设 备 UE上报的指示标识, 所述指示标识用于表征所述 UE待上报的 CSI信息与所 述 UE此前上报的 CSI信息是否相同, 其中, 所述指示标识的比特位少于 CSI信 息的比特位。
在所述第二方面的第一种可能的实现方式中, 所述方法进一步包括: 当所述指示标识表征所述待上报的 CSI信息与所述此前上报的 CSI信息不 相同时, 接收所述 UE上报的所述待上报的 CSI信息。
在所述第二方面或所述第二方面的第一种可能的实现方式中,还提供了所 述第二方面的第二种可能的实现方式,在所述第二方面的第二种可能的实现方 式中, 所述接收所述 UE上报的所述待上报的 CSI信息, 具体包括:
在下一个上报子帧上接收所述 UE上报的所述待上报的 CSI信息; 或者, 向所述 UE发送非周期上报指示, 接收所述 UE根据所述非周期上报 指示上报的所述待上报的 CSI信息。
在所述第二方面或所述第二方面的第一种可能或第二种可能的实现方式 中,还提供了所述第二方面的第三种可能的实现方式,在所述第二方面的第三 种可能的实现方式中, 所述在下一个上报子帧上接收所述 UE上报的所述待上 报的 CSI信息, 具体包括:
在与所述上报子帧相邻的下一个上报子帧上, 接收所述 UE上报的所述待 上报的 CSI信息;
或者,在下一个相邻的子带上 ·^艮周期中, 与所述上 子帧对应的下一个上 报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所述子带上报周期包含 上报多个子带 CSI信息的多个上报子帧;
或者,在下一个相邻的宽带上 ·^艮周期中, 与所述上 子帧对应的下一个上 报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所述宽带上报周期包含 一个上报宽带 CSI信息的上报子帧以及多个子带上报周期的上报子帧。
在所述第二方面或所述第二方面的第一种可能、第二种可能或第三种可能 的实现方式中,还提供了所述第二方面的第四种可能的实现方式,在所述第二 方面的第四种可能的实现方式中, 所述 CSI信息为下述任意一种指示或至少两 - - 种指示的组合:
信道质量指示 CQI、 预编码矩阵指示 PMI、 预编码类型指示 PTI和秩指示
RI。
在所述第二方面或所述第二方面的第一种可能、第二种可能、第三种可能 或第四种可能的实现方式中, 还提供了所述第二方面的第五种可能的实现方 式,在所述第二方面的第五种可能的实现方式中, 所述指示标识占用至少一个 比特位;
所述比特位为 0表示待上报的 CSI信息中的至少一个指示与此前上报的 CSI 信息中的至少一个指示相同,所述比特位为 1表示待上报的 CSI信息中的至少一 个指示与此前上报的 CSI信息中的至少一个指示不相同;
或者,所述比特位为 1表示待上报的 CSI信息中的至少一个指示与此前上报 的 CSI信息中的至少一个指示相同, 所述比特位为 0表示待上报的 CSI信息中的 至少一个指示与此前上 ·^艮的 CSI信息中的至少一个指示不相同。
在所述第二方面或所述第二方面的第一种可能、第二种可能、第三种可能、 第四种可能或第五种可能的实现方式中,还提供了所述第二方面的第六种可能 的实现方式, 在所述第二方面的第六种可能的实现方式中, 当所述 CSI信息为 CQI和 PMI的组合时, 所述指示标识占用 2个比特位, 其中一个比特位用于表征 待上报的 CSI信息中的 CQI与此前上报的 CSI信息中的 CQI是否相同, 另一个比 特位用于表征待上报的 CSI信息中的 PMI与此前上报的 CSI信息中的 PMI是否 相同;
所述接收所述 UE上报的所述待上报的 CSI信息, 具体包括:
如果待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI和 PMI不相同, 则接收所述 UE上报的待上报的 CSI信息中的 CQI和 PMI;
如果待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信息 中的 CQI或 PMI不相同, 则接收所述 UE上报的与此前上报的 CSI信息中不同的 待上报指示, 或者接收所述 UE上报的待上报的 CSI信息中的 CQI和 PMI。
在所述第二方面或所述第二方面的第一种可能、第二种可能、第三种可能、 第四种可能、第五种可能或第六种可能的实现方式中,还提供了所述第二方面 的第七种可能的实现方式,在所述第二方面的第七种可能的实现方式中,在所 - - 述基站在上报子帧接收用户设备 UE上报的指示标识之前, 所述方法进一步包 括:
向所述 UE发送新模式指示信令, 所述新模式指示信令用于指示所述 UE按 照所述第一方面所述的方法上 "^CSI信息。
第三方面, 本发明实施例还提供了一种用户设备, 包括:
信息上报单元, 用于在周期性上报信道状态信息 CSI的过程中, 向基站上 报 CSI信息;
判断单元,用于判断待上报的 CSI信息与所述信息上报单元此前上报的 CSI 信息是否相同, 以得到判断结果;
标识上报单元,用于根据所述判断单元的判断结果在上报子帧向基站上报 指示标识,所述指示标识用于表征所述待上报的 CSI信息与所述此前上报的 CSI 信息是否相同, 其中, 所述指示标识的比特位少于 CSI信息的比特位。
在所述第三方面的第一种可能的实现方式中,所述信息上报单元还用于当 所述判断单元的所述判断结果为所述待上报的 CSI信息与所述此前上报的 CSI 信息不相同时, 向所述基站上报所述待上报的 CSI信息。
在所述第三方面或所述第三方面的第一种可能的实现方式中,还提供了所 述第三方面的第二种可能的实现方式,在所述第三方面的第二种可能的实现方 式中, 所述判断单元具体包括:
第一判断子单元, 用于判断所述待上报的 CSI信息与所述此前上报的 CSI 信息是否完全相等, 如果判断结果为是, 则确定所述待上 ·^艮的 CSI信息与所述 此前上 ·^艮的 CSI信息相同, 否则不相同;
第二判断子单元, 用于判断所述待上报的 CSI信息与所述此前上报的 CSI 信息之间的差值是否超过预设阈值,如果判断结果为否, 则确定所述待上报的
CSI信息与所述此前上报的 CSI信息相同, 否则不相同。
在所述第三方面或所述第三方面的第一种可能或第二种可能的实现方式 中,还提供了所述第三方面的第三种可能的实现方式,在所述第三方面的第三 种可能的实现方式中, 所述信息上报单元具体包括:
第一上报子单元,用于在下一个上报子帧上向所述基站上报所述待上报的
CSI信息; - - 第二上报子单元, 用于接收所述基站发送的非周期上报指示,根据所述非 周期上报指示向所述基站上报所述待上报的 CSI信息。
在所述第三方面或所述第三方面的第一种可能、第二种可能或第三种可能 的实现方式中,还提供了所述第三方面的第四种可能的实现方式,在所述第三 方面的第四种可能的实现方式中, 所述第一上报子单元具体用于,在频选上报 模式下:
在与上 ·^艮所述指示标识的所述上 ·^艮子帧相邻的下一个上 ·^艮子帧上,向所述 基站上报所述待上报的 CSI信息;
在下一个相邻的子带上艮周期中,与所述上 子帧对应的下一个上艮子帧 上, 向所述基站上报所述待上报的 CSI信息, 所述子带上报周期包含上报一次 多个子带 CSI信息的多个上报子帧;
在下一个相邻的宽带上艮周期中,与所述上 子帧对应的下一个上艮子帧 上, 向所述基站上报所述待上报的 CSI信息, 所述宽带上报周期包含一个上报 宽带 CSI信息的上报子帧以及多个子带上报周期的上报子帧。
在所述第三方面或所述第三方面的第一种可能、第二种可能、第三种可能 或第四种可能的实现方式中, 还提供了所述第三方面的第五种可能的实现方 式,在所述第三方面的第五种可能的实现方式中, 所述信息上报单元上报的所 述 CSI信息为下述任意一种指示或至少两种指示的组合:
信道质量指示 CQI、 预编码矩阵指示 PMI、 预编码类型指示 PTI和秩指示 RI。
在所述第三方面或所述第三方面的第一种可能、第二种可能、第三种可能、 第四种可能或第五种可能的实现方式中,还提供了所述第三方面的第六种可能 的实现方式,在所述第三方面的第六种可能的实现方式中, 所述标识上 4艮单元 上报的所述指示标识占用至少一个比特位;
所述标识上报单元上报的所述比特位为 0表示待上报的 CSI信息中的至少 一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示待 上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示不 相同;
所述标识上报单元上报的所述比特位为 1表示待上报的 CSI信息中的至少 - - 一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 0表示待 上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示不 相同。
在所述第三方面或所述第三方面的第一种可能、第二种可能、第三种可能、 第四种可能、第五种可能或第六种可能的实现方式中,还提供了所述第三方面 的第七种可能的实现方式,在所述第三方面的第七种可能的实现方式中, 所述 标识上 ·^艮单元还用于当所述 CSI信息为 CQI和 PMI的组合时,上 ·^艮的所述指示标 识占用 2个比特位, 其中一个比特位用于表征待上 ·^艮的 CSI信息中的 CQI与此前 上报的 CSI信息中的 CQI是否相同, 另一个比特位用于表征待上报的 CSI信息中 的 PMI与此前上报的 CSI信息中的 PMI是否相同;
所述信息上报单元具体用于:
当待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI和 PMI不相同时, 向所述基站上报待上报的 CSI信息中的 CQI和 PMI;
当待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信息中 的 CQI或 PMI不相同时,向所述基站上报与此前上报的 CSI信息中不同的待上报 指示, 或者将待上报的 CSI信息中的 CQI和 PMI均上报给所述基站。
在所述第三方面或所述第三方面的第一种可能、第二种可能、第三种可能、 第四种可能、 第五种可能、 第六种可能或第七种可能的实现方式中, 还提供了 所述第三方面的第八种可能的实现方式,在所述第三方面的第八种可能的实现 方式中, 所述用户设备进一步包括:
接收单元, 用于在所述判断单元判断待上报的 CSI信息与所述信息上报单 元此前上报的 CSI信息是否相同之前, 接收所述基站发送的新模式指示信令, 所述新模式指示信令用于指示所述用户设备上报指示标识。
第四方面, 本发明实施例还提供了一种基站, 包括:
标识接收单元, 用于在周期性上报信道状态信息 CSI的过程中, 在上报子 帧上接收用户设备 UE上报的指示标识, 所述指示标识用于表征所述 UE待上报 的 CSI信息与所述 UE此前上报的 CSI信息是否相同, 其中, 所述指示标识的比 特位少于 CSI信息的比特位。
在所述第四方面的第一种可能的实现方式中, 所述基站进一步包括: - - 信息接收单元,用于当所述标识接收单元接收的所述指示标识表征所述待 上报的 CSI信息与所述此前上报的 CSI信息不相同时, 接收所述 UE上报的所述 待上报的 CSI信息。
在所述第四方面或所述第四方面的第一种可能的实现方式中,还提供了所 述第四方面的第二种可能的实现方式,在所述第四方面的第二种可能的实现方 式中, 所述信息接收单元具体用于:
在下一个上报子帧上接收所述 UE上报的所述待上报的 CSI信息; 所述指示发送单元还用于向所述 UE发送非周期上 指示;
所述信息接收单元还具体用于接收所述 UE根据所述非周期上报指示上报 的所述待上报的 CSI信息。
在所述第四方面或所述第四方面的第一种可能或第二种可能的实现方式 中,还提供了所述第四方面的第三种可能的实现方式,在所述第四方面的第三 种可能的实现方式中, 所述信息接收单元具体包括:
第一接收子单元, 用于在与所述上报子帧相邻的下一个上报子帧上,接收 所述 UE上报的所述待上报的 CSI信息;
第二接收子单元, 用于在下一个相邻的子带上报周期中, 与所述上报子帧 对应的下一个上报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所述子 带上报周期包含上报一次多个子带 CSI信息的多个上报子帧;
第三接收子单元, 用于在下一个相邻的宽带上报周期中, 与所述上报子帧 对应的下一个上报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所述宽 带上报周期包含一个上报宽带 CSI信息的上报子帧以及多个子带上报周期的上 报子帧。
在所述第四方面或所述第四方面的第一种可能、第二种可能或第三种可能 的实现方式中,还提供了所述第四方面的第四种可能的实现方式,在所述第四 方面的第四种可能的实现方式中, 所述信息接收单元接收的所述 CSI信息为下 述任意一种指示或至少两种指示的组合:
信道质量指示 CQI、 预编码矩阵指示 PMI、 预编码类型指示 PTI和秩指示
RI。
在所述第四方面或所述第四方面的第一种可能、第二种可能、第三种可能 - - 或第四种可能的实现方式中, 还提供了所述第四方面的第五种可能的实现方 式,在所述第四方面的第五种可能的实现方式中, 所述标识接收单元接收的所 述指示标识占用至少一个比特位;
所述标识接收单元接收的所述比特位为 0表示待上报的 CSI信息中的至少 一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示待 上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示不 相同;
所述标识接收单元接收的所述比特位为 1表示待上报的 CSI信息中的至少 一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 0表示待 上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示不 相同。
在所述第四方面或所述第四方面的第一种可能、第二种可能、第三种可能、 第四种可能或第五种可能的实现方式中,还提供了所述第四方面的第六种可能 的实现方式, 在所述第四方面的第六种可能的实现方式中, 当所述 CSI信息为 CQI和 PMI的组合时, 所述标识接收单元接收的指示标识占用 2个比特位, 其中 一个比特位用于表征待上报的 CSI信息中的 CQI与此前上报的 CSI信息中的 CQI 是否相同,另一个比特位用于表征待上报的 CSI信息中的 PMI与此前上报的 CSI 信息中的 PMI是否相同;
所述信息接收单元具体用于:
当待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI和
PMI不相同时, 接收所述 UE上报的待上报的 CSI信息中的 CQI和 PMI;
当待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信息中 的 CQI或 PMI不相同时, 接收所述 UE上报的与此前上报的 CSI信息中不同的待 上报指示, 或者接收所述 UE上报的待上报的 CSI信息中的 CQI和 PMI。
在所述第四方面或所述第四方面的第一种可能、第二种可能、第三种可能、 第四种可能、第五种可能或第六种可能的实现方式中,还提供了所述第四方面 的第七种可能的实现方式,在所述第四方面的第七种可能的实现方式中, 所述 基站进一步包括:
模式切换指示单元, 用于在所述标识接收单元在上报子帧接收所述 UE上 - - 报的指示标识之前, 向所述 UE发送新模式指示信令, 所述新模式指示信令用 于指示所述 UE上报指示标识。
第五方面, 本发明实施例还提供了一种信息上报的系统, 包括: 用户设备 UE和基站, 其中,
所述 UE,用于在周期性上报信道状态信息 CSI的过程中,判断待上报的 CSI 信息与此前上报的 CSI信息是否相同, 以得到判断结果, 根据判断结果向基站 上报指示标识;
所述基站, 用于在上报子帧上接收所述 UE上报的指示标识, 所述指示标 识用于表征所述 UE待上报的 CSI信息与所述 UE此前上报的 CSI信息是否相同; 其中, 所述指示标识的比特位少于 CSI信息的比特位。
本发明实施例提供的信息上报的方法、 用户设备、基站及系统, 能够在向 基站上报待上报的 CSI信息前, 由 UE判断待上报的 CSI信息与此前上报的 CSI 信息是否相同, 然后根据判断结果向基站上报指示标识, 该指示标识用于表征 待上报的 CSI信息与此前上报的 CSI信息是否相同。 当待上报的 CSI信息与此前 上报的 CSI信息相同或者相同时, UE不向基站发送相同的 CSI信息。 由于指示 标识的比特位小于 CSI信息的比特位,所以与现有技术中 UE在每个上报子帧都 上报 CSI信息相比, 可以在待上报的 CSI信息与此前上报的 CSI信息相同的情况 下避免重复上报相同的 CSI信息, 由此节省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN的信道变化相对较慢、 UE上报的 CSI信息变化较小的场 景, 可以节省大量的上行链路信令开销。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施 例或现有技术描述中所需要使用的附图作筒单地介绍,显而易见地, 下面描述 中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲, 在不付 出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1 ( a )至图 1 ( c ) 为现有技术中的宽带上报模式和频选上报模式; 图 2为本发明实施例中信息上 4艮的方法流程图;
图 3 ( a )至图 3 ( d )为本发明实施例中 CSI信息上 ·^艮的示意图; - - 图 4 ( a )和图 4 ( b )为本发明实施例中另一个 CSI信息上 ·^艮的示意图; 图 5为本发明实施例中再一个 CSI信息上报的示意图;
图 6为本发明实施例中另一个信息上报的方法流程图;
图 7为本发明实施例中用户设备的结构示意图;
图 8为本发明实施例中另一个用户设备的结构示意图;
图 9为本发明实施例中基站的结构示意图;
图 10为本发明实施例中另一个基站的结构示意图;
图 11为本发明实施例中信息上报的系统示意图;
图 12为本发明实施例中再一个用户设备的结构示意图;
图 13为本发明实施例中再一个基站的结构示意图;
图 14为为本发明实施例中另一个信息上报的系统示意图。 具体实施方式
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, 所描述的实施例仅仅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。
为便于对本发明实施例进行说明,首先对 SCN场景下 UE上报 CSI信息的方 式进行筒单介绍。 在 SCN场景下, UE可以通过周期上报或非周期上报两种上 报方式向基站上报 CSI信息。 其中周期上报方式又分为宽带上报模式和频选上 报模式。 如图 1 ( a )所示, 在宽带上报模式中, UE按照预设间隔时长 Np向基 站上报宽带 (Wide Band, 筒称 WB ) 的 CSI信息。 如图 1 ( b )所示, 在频选上 报模式中, 一个 WB被划分为多个部分带宽 (Bandwidth Part, 筒称 BP ), 每个 BP中包含多个子带(Sub Band,筒称 SB ),每个 BP中选择出一个最佳子带( Best SB ), UE对最佳子带的 CSI信息进行上报。 如图 1 ( c )所示, 以一个 WB包含 3 个 BP , SB上报循环 2次为例, UE首先上报 WB的 CSI信息, 然后依次上报 SB1 的 CSI信息、 SB2的 CSI信息和 SB3的 CSI信息, 上报 SB的 CSI信息循环 2次, 由 此结束一次频选上 ·^艮, 其中, 每两次 CSI信息上 4艮之间的间隔时长为 Np。 本发 明实施例将一次频选上报的周期称为宽带周期, 在图 1 ( c )中一个宽带周期的 - - 时长为 7个 Np; 将 SB上报一次 SB的 CSI信息的周期称为子带周期, 在图 1 ( c ) 中一个子带周期的时长为 3个 Np, 即 UE依次上报一次 SB1、 SB2和 SB3的 CSI信 息的周期。 一个宽带周期包含两个子带周期。
下面, 基于图 1所示的上报模式对本发明实施例进行说明。
本发明实施例提供了一种信息上报的方法, 该方法应用于 UE侧。 如图 2所 示, 所述方法包括:
201、 在周期性上报信道状态信息 CSI的过程中, UE判断待上报的 CSI信 息与此前上报的 CSI信息是否相同, 以得到判断结果。
所述此前上报的 CSI信息可以为 UE在前一个上报子帧上报的 CSI信息。 例 如, UE按照图 1 ( a ) 中所示的周期 Np向基站上报 WB的 CSI信息 (后续筒称为 上报 CSI信息)。在图中箭头所指的上报子帧 2上, UE需要向基站上报 CSI信息。 在上报 CSI信息前 ,UE判断待上报的 CSI信息与 UE此前在上报子帧 1上上报的 CSI信息是否相同。
需要说明的是, 本发明实施例所述判断待上报的 CSI信息与此前上报的 CSI信息是否相同, 并不是指判断待上报的 CSI信息是否与此前上报过的所有 CSI信息均不相同, 而是指判断待上报的 CSI信息是否与此前上报过的某一个 CSI信息相同。 优选的, 在本发明实施例中, UE判断待上报的 CSI信息与前一 次对应上报的 CSI信息是否相同。
202、 UE根据判断结果在上报子帧向基站上报指示标识。
所述指示标识用于指示待上报的 CSI信息与此前上报的 CSI信息是否相 同。 当上报子帧 2上待上报的 CSI信息与上报子帧 1上已上报的 CSI信息相同时, UE取消在上报子帧 2上上报 CSI信息,并且在上报子帧 2上向基站上报一个表征 两者相同的指示标识。 基站在接收到该指示标识后, 沿用 UE在上报子帧 1上上 报的 CSI信息作为确定下一阶段下行链路 DL所使用 MCS的依据之一。
所述指示标识的比特位少于 CSI信息的比特位, 例如所述指示标识可以为 一个 1到 4比特的标识 ,比特位可以为 0或 1。在本发明实施例的一个优选方案中 , 所述指示标识为一个 1比特的标识。
通常, UE上报的 CSI信息中会携带 CQI、 PMI、 PTI或 RI中的至少一种指示, UE通过一个一比特的标识表征待上报的 CSI信息中携带的至少一种指示与此 - - 前上报的 CSI信息中携带的至少一种指示是否相同,当待上报的 CSI信息中携带 的所有指示均与此前上报的 CSI信息中携带的所有指示对应相同时, 该比特表 征待上报的 CSI信息与此前上报的 CSI信息相同。一般 CQI占用 4个比特位, PMI 占用 4个比特位, 第二码字 CQI或 PMI占用 3个比特位, PTI占用 1至 2个比特位, RI占用 1至 3个比特位。 UE上报的 CSI信息中至少携带一个 CQI, 即 UE每次上报 的 CSI信息最少为 4比特。 当 UE本次待上报的 CSI信息与此前上报的 CSI信息相 同时, UE不上报相同的 CSI信息而是上报一个 1比特的指示标识, 由此在本次 上报过程中至少可以节省 3 ( 4-1=3 ) 比特的上行链路信令开销。
所述指示标识通过相反的两个比特位表征先后发送的 CSI信息是否相同。 例如, 当指示标识为 1时表示先后发送的 CSI信息相同, 当指示标识为 0时表示 先后发送的 CSI信息不相同, 或者当指示标识为 0时表示先后发送的 CSI信息相 同, 当指示标识为 1时表示先后发送的 CSI信息不相同。本发明实施例中以指示 标识为 0表示先后发送的 CSI信息相同,指示标识为 1表示先后发送的 CSI信息不 相同为例进行说明。
现有技术中, UE在上报 CSI信息之前不判断待上报的 CSI信息是否与此前 上报的 CSI信息是否相同, 而是在每个上报子帧上都上报一次 CSI信息。在 SCN 场景下, SCN的信道变化相对较慢, 大多数上报的 CSI信息都相同。 这种重复 上报相同 CSI信息的上报方式对上行链路造成了不必要的信令开销。 本发明实 施例提供的信息上报的方法,能够在上报 CSI信息前对本次待上报的 CSI信息与 此前上报的 CSI信息是否相同进行判断, 然后向基站上报一个用于表征两者是 否相同的指示标识。 当待上报的 CSI信息与此前上报的 CSI信息相同时,基站沿 用 UE此前上报的 CSI信息作为选择下行链路 MCS的依据之一, UE不需要向基 站重复上 4艮相同的 CSI信息。 由于指示标识的比特位小于 CSI信息的比特位,所 以与现有技术中 UE在每个上报子帧都上报 CSI信息相比, 可以在待上报的 CSI 信息与此前上报的 CSI信息相同的情况下避免重复上报相同的 CSI信息,由此节 省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN的信道变化相对较 慢、 UE上报的 CSI信息变化较小的场景, 可以节省大量的上行链路信令开销。
进一步的,作为对图 2所示方法的详细说明及进一步扩展, 当步骤 201的判 断结果为待上报的 CSI信息与此前上报的 CSI信息不相同时, UE除了向基站上 - - 报指示标识以外, 还可以向基站上报待上报的 CSI信息, 以便基站将 UE上报的 CSI信息作为选择下一阶段下行链路 MCS的依据之一。
UE上报待上报的 CSI信息的时机可以是在步骤 202之前、步骤 202之后或者 与步骤 202同时执行, 本发明实施例对此不做限制。 需要说明的是, 当待上报 的 CSI信息与此前上报的 CSI信息不相同时, 与现有技术相比, UE除了上报待 上报的 CSI信息以外还多上报了一个 1比特的指示标识,涉及的信令开销比现有 技术多 1比特。但是这并不与解决的技术问题相矛盾。 这是因为在 SCN场景下, UE反馈信道变化的 CSI信息变化较小, 大多数待上报的 CSI信息都与此前上报 的 CSI信息相同, 所以从整体上看, 在大多数上报的 CSI信息都与此前上报的 CSI信息相同的情况下,本发明实施例在少数情况下多上报 1比特的指示标识相 对节省信令开销的整体效果而言, 其影响可以忽略不计。
进一步的, 在本发明实施例中, 当 UE首次向基站上报 CSI信息时, 即在 UE上报本次 CSI信息之前没有上报过 CSI信息时, UE可以首先向基站发送一个 或多个 CSI信息, 以便为后续上报 CSI信息提供可以进行判断的历史 CSI信息。 具体的, UE向基站发送一个或多个 CSI信息的实现方式可以是下述 4种方式之
1 ) UE向基站上报一次 CSI信息。
在上报 CSI信息之初, UE首先发起一次非周期上报流程, 将反映当前信道 状态的 CSI信息上报给基站。
2 ) UE接收基站发送的非周期上报指示, 根据非周期上报指示向基站上报
CSI信息。
在上报 CSI信息之初, 基站首先发起一次非周期上报流程, 向 UE发送非周 期上报指示, 指示 UE上报 CSI信息。 UE接收到非周期上报指示后, 向基站上 报一个或多个 CSI信息。 此外, UE也可以先后接收基站发送的多个非周期上报 指示, 在每次接收到一个非周期上报指示时向基站上报一次 CSI信息, 该 CSI 信息为上报 CSI信息时反映当前信道状态的 CSI信息。
3 ) UE在预设时长内向基站周期性上报 CSI信息。
在上报 CSI信息之初, UE执行周期上报流程, 按照现有的上报方式周期性 向基站上报 CSI信息。 在一段时间 (预设时长)后, UE停止现有的周期性上报 - - 方式, 然后按照图 2所示的实现方式上报 CSI信息。所述预设时长大于上报时间 间隔,例如预设时长可以为 4个 Np, UE在按照现有实现方式上报 4个 CSI信息后 按照图 2所示的实现方式上报 CSI信息。在实际应用中所述预设时长可以根据信 道变化的特点进行设置, 例如 SCN场景下信道变化较慢, 每次上报的 CSI信息 通常相同, 则可以设置一个较短的预设时长; Macro eNB的小区场景下信道变 化相对较大, 则可以设置一个较长的预设时长。本发明实施例对预设时长的设 置不做限制。
4 ) UE向基站周期性上报 CSI信息, 当上报的相同 CSI信息的数量超过预设 数量时, 结束周期性上报 CSI信息。
在上报 CSI信息之初, UE执行周期上报流程, 按照现有的实现方式周期性 向基站上报 CSI信息。 当信道状态稳定后, UE上报的多个 CSI信息均相同。 如 果 UE连续上报的相同 CSI信息的数量超过预设数量, 例如超过 5个, 则 UE停止 现有的周期性上报方式, 然后按照图 2所示的实现方式上报 CSI信息。
在上报 CSI信息之初, UE向基站上报一个或多个 CSI信息的目的在于, 图 2 中所示的上报方式需要将待上报的 CSI信息与历史 CSI信息(此前上报的 CSI信 息)进行比较, UE向基站上报一个或多个 CSI信息可以为首次上报 CSI信息提 供用于比较的历史 CSI信息。
进一步的, 作为对图 2步骤 201的细化, UE判断待上报的 CSI信息与此前 上报的 CSI信息是否相同, 具体包括下述两种判断方式, 在实现过程中, 可以 择一使用:
1 ) UE判断待上报的 CSI信息与此前上报的 CSI信息是否完全相等, 如果判 断结果为是,则确定待上报的 CSI信息与此前上报的 CSI信息相同,如果判断结 果为否,则确定待上报的 CSI信息与此前上报的 CSI信息不相同。以 4比特的 CQI 指示为例, UE此前上 ^艮的 CQI指示为 1011 , UE本次待上 ^艮的 CQI指示为 1010, 则 UE判断本次待上报的 CQI指示与此前上报的 CQI指示不相同。
2 )UE判断待上报的 CSI信息与此前上报的 CSI信息之间的差值是否超过预 设阈值,如果判断结果为否,则确定待上报的 CSI信息与此前上报的 CSI信息相 同,如果判断结果为是,则确定待上报的 CSI信息与此前上报的 CSI信息不相同。 仍以 4比特的 CQI指示为例, UE此前上报的 CQI指示为 1011 , UE本次待上报的 - -
CQI指示为 1010 , 两者差值为 1不超过预设阈值 2 , 因此 UE判断本次待上报的 CQI指示与此前上报的 CQI指示相同; 或者, UE此前上报的 CQI指示为 1011 , UE本次待上报的 CQI指示也为 1011 , 两者差值为 0, 因此 UE判断本次待上报的 CQI指示与此前上报的 CQI指示相同。
进一步的, 当待上报的 CSI信息与此前上报的 CSI信息不相同时, UE在上 报指示标识后向基站上报待上报的 CSI信息, 具体为: UE在下一个上报子帧上 向基站上报待上报 CSI信息, 或者接收基站发送的非周期上报指示, 根据非周 期上报指示向基站上报待上报 CSI信息,所述非周期上报指示为基站根据 UE上 报的指示标识发送的上报指示。
所述在下一个上报子帧上上报待上报的 CSI信息可以是在与上报指示标识 的上报子帧相邻的下一个上报子帧上上报待上报的 CSI信息。 例如对于宽带上 报模式, 在图 3 ( a ) 中, UE在上报子帧 3上向基站上报指示标识 1 , 然后在上 报子帧 4上向基站上报待上报的 CSI信息,该待上报的 CSI信息为 UE准备在上报 子帧 3上上报的 CSI信息。
又例如对于频选上报模式, 在图 3 ( c ) 中, UE在上报子帧 3上向基站上报 指示标识 1 ,然后在上报子帧 4上向基站上报待上报的 CSI信息,该待上报的 CSI 信息为 UE准备在上报子帧 3上上报的 SB2的 CSI信息。 然后从上报子帧 5开始, UE顺延上报 SB3、 WB、 SB1的指示标识。
此外, UE在向基站上 ·^艮指示标识后, 可以不在下一个相邻的上 ·^艮子帧上 向基站上报待上报 CSI信息, 而是等待基站发送一个非周期上报指示。 基站在 接收到 UE上报的指示标识 1后, 向 UE发送一个非周期上报指示, 指示 UE触发 一个非周期上报流程 .UE接收到非周期上报指示后, 向基站上报待上报的 CSI 信息。 例如在图 3 ( b )所示的宽带上报模式中, UE在上报子帧 3上向基站上报 指示标识 1 , 然后在上报子帧 3之后的某个子帧 X上接收基站发送的非周期上报 指示, 在子帧 X+kms(FDD k=4,TDD k=4,5,6,7) (例如上报子帧 x+4ms )上上报 待上报的 CSI信息, 该待上报的 CSI信息为 UE准备在上报子帧 3上上报的 CSI信 息。
又例如在图 3 ( d )所示的频选上报模式中, UE在上报子帧 3上向基站上报 指示标识 1 , 然后在上报子帧 3之后的某个子帧 X上接收到基站发送的非周期上 - - 报指示, 然后 UE在子帧 X+k ms (FDD k=4,TDD k=4,5,6,7) (例如上报子帧 x+4 ms )上上报待上报的 CSI信息,该待上报的 CSI信息为 UE准备在上报子帧 3上上 报的 SB2的 CSI信息。
所述在下一个上报子帧上上报待上报的 CSI信息还可以是在与上报指示标 识的上报子帧对应的下一个上报子帧上上报待上报的 CSI信息。 例如在频选上 报模式中, UE可以在下一个相邻的上报子带周期中与上报指示标识的上报子 帧对应的上报子帧上(即与上报指示标识的上报子帧对应的下一个相邻上报子 带周期上报子帧), 向基站上报待上报 CSI信息,所述上报子带周期包含上报一 次多个子带 CSI信息的多个上 ·^艮子帧。 例如在图 1 (c)中, 上 4艮子帧 2至上 4艮子 帧 4依次为上报 SB1、 SB2和 SB3的上报子帧, 即上报子帧 1至上报子帧 4之间的 3个 Np组成一个子带周期。 具体的, 如图 4 )所示, UE在上 ^艮子帧 3上上 4艮 SB2 ( 1 )的指示标识 1, 然后在上报子帧 4和上报子帧 5上顺序上报 SB3 ( 1 )和 SB1 (2)的指示标识 0。 其中, (1 )表示本宽带周期内的第一个子带周期, (2) 表示本宽带周期内的第二个子带周期。 在上报子帧 6上 (SB2的第二子带周期 上报子帧), UE上报 SB2 ( 1 ) 的 CSI信息, 接着在上报子帧 7和上报子帧 8上顺 序上报 SB3 (2)和第二宽带周期的 WB的指示标识 1, 在上报子帧 9和上报子帧 10上顺序上报第二宽带周期的 SB1 ( 1 )和 SB2 ( 1 )的指示标识 0。 在上报子帧 11 (SB3的第一子带周期上报子帧)上, UE上报第一宽带周期 SB3 (2)的 CSI 信息, 在上报子帧 15 (WB的第三宽带周期的上报子帧)上上报第二宽带周期 的 WB的 CSI信息, 以此类推。
此外, 在频选上报模式中, UE也可以在下一个相邻的上报宽带周期中与 上报指示标识的上报子帧对应的上报子帧上(即与上报指示标识的上报子帧对 应的下一个相邻上报宽带周期上报子帧), 向基站上报待上报 CSI信息,所述上 报宽带周期包含一个上报宽带 CSI信息的上报子帧以及多个子带周期的上报子 帧。 例如在图 1 (c) 中, 上报子帧 1至上报子帧 7依次为上报 WB、 SB1 ( 1 )、 SB2 ( 1 )、 SB3 ( 1 )、 SB1 (2)、 SB2 ( 2 )和 SB3 (2) 的上报子帧, 即上 4艮子 帧 1至上报子帧 7的 7个 Np组成一个宽带周期。 具体的, 如图 4 (b) 所示, UE 在上报子帧 1至 7上顺序上报 WB、 SB1 ( 1 )、 SB2 ( 1 )、 SB3 ( 1 )、 SB1 (2)、 SB2 ( 2 )和 SB3 (2) 的指示标识依次为 0、 0、 1、 0、 0、 0和 1, 其中上 4艮子帧 - -
3和上报子帧 7上分别上报 SB2 ( 1 )和 SB3 ( 2 )的指示标识 1。 在第二宽带周期 内上报 SB2 ( 1 ) (上报子帧 10 )和 SB3 ( 2 ) (上报子帧 14 ) 的上报子帧上, UE 分别将第一宽带周期中 SB2 ( 1 )和 SB3 ( 2 ) 的 CSI信息上 4艮给基站。
进一步的, 当所述 CSI信息为 CQI和 PMI的组合时, 所述指示标识占用 2个 比特位,其中一个比特位代表待上报的 CSI信息中的 CQI与此前上报的 CSI信息 中的 CQI是否相同,另一个比特位代表待上报的 CSI信息中的 PMI与此前上报的 CSI信息中的 PMI是否相同。 如果待上报的 CSI信息中的 CQI和 PMI均与此前上 报的 CSI信息中的 CQI和 PMI不相同, 则在上报指示标识 11后, UE向基站上报 待上报的 CSI信息中的 CQI和 PMI。如果待上报的 CSI信息中的 CQI和 PMI中有一 项指示与此前上报的 CSI信息中的 CQI或 PMI不相同,则在上报指示标识 10或 01 后, UE向基站上报与此前上报的 CSI信息中不同的待上报指示, 或者将待上报 的 CSI信息中的 CQI和 PMI均上报给基站。
具体的, 以宽带上报模式为例, 如图 5所示, 在上报子帧 1上 UE向基站上 报 00 , 其中第一个 0为 CQI的指示标识, 表示本次待上报的 CQI与此前上报的 CQI相同;第二个 0为 PMI的指示标识,表示本次待上报的 PMI与此前上报的 PMI 相同。 在上报子帧 3上 UE向基站上报 10, 其中第一个 1为 CQI的指示标识, 表示 本次待上报的 CQI与此前上报的 CQI不相同; 第二个 0为 PMI的指示标识, 表示 本次待上报的 PMI与此前上报的 PMI相同。 在上报子帧 5上 UE向基站上报 11 , 其中第一个 1为 CQI的指示标识, 表示本次待上 4艮的 CQI与此前上 ^艮的 CQI相 同; 第二个 1为 PMI的指示标识, 表示本次待上报的 PMI与此前上报的 PMI不相 同。 当 UE上报的内容为 00时, UE后续不向基站上报本次待上报的 CQI及 PMI (上报子帧 1上待上报的 CQI及 PMI ); 当 UE上报的内容为 11时, UE在下一个 相邻的上报子帧(例如图 5中的上报子帧 6 )或根据基站的非周期上报指示向基 站上报本次待上报的 CQI及 PMI (上报子帧 5上待上报的 CQI及 PMI ); 当 UE上 报的内容为 10时, UE在下一个相邻的上报子帧 (例如图 5中的上报子帧 4 )或 根据基站的非周期上报指示向基站上报本次待上报的 CQI及 PMI (上报子帧 3 上待上报的 CQI及 PMI )。 优选的, 为进一步节省上行链路的信令开销, UE还 可以仅将与此前不同的指示上报给基站。 例如, 在图 5中, 上报子帧 3上报 10, 则在上报子帧 4上 UE仅将上报子帧 3上待上报的 CQI上报给基站 ,而不将上报子 - - 帧 3上待上艮的 PMI上艮给基站。
图 5中以 CSI信息包含两个指示为例进行了说明, 实际应用中, CSI信息中 包含几个指示 UE就可以上报几个比特的指示标识, 然后根据上报的多比特指 示标识上报待上报的一个或全部指示, 本发明实施例对此不再赘述。
图 5以宽带上报模式为例对 UE上报多比特指示标识进行了说明,在频选上 报模式中 UE也可以基于相同的上报方式上报多比特指示标识, 此处同样不再 赘述。
在 LTE-A的 Rel-10/11/12版本协议中, 宽带上报模式可以为模式(mode ) 1-0和 model-1 ,频选上报模式可以为 mode2-0和 mode2-l。
Figure imgf000023_0001
中, UE不上报 PMI, 在实际应用中, UE可以按照图 3或图 4所示的上报模式上 报 CSI信息。 在 model-1和 mode2-l中, UE上报 CQI和 PMI, 在实际应用中, UE 可以按照图 5所示的上报模式上报 CSI信息。
可选的,在执行步骤 201之前, UE还可以接收基站发送的新模式指示信令, 该新模式指示信令用于指示 UE按照图 2所示的上报方式向基站上报 CSI信息。 在接收到新模式指示信令之前, UE按照现有的上报方式向基站上报 CSI信息, 当接收到新模式指示信令后, UE按照图 2所示的上报方式上报 CSI信息。
现有技术中, UE在上报 CSI信息之前不判断待上报的 CSI信息是否与此前 上报的 CSI信息是否相同, 而是在每个上报子帧上都上报一次 CSI信息。在 SCN 场景下, SCN的信道变化相对较慢, 大多数上报的 CSI信息都相同。 这种重复 上报相同 CSI信息的上报方式对上行链路造成了不必要的信令开销。 本发明实 施例提供的信息上报的方法,能够在上报 CSI信息前对本次待上报的 CSI信息与 此前上报的 CSI信息是否相同进行判断, 然后向基站上报一个用于表征两者是 否相同的指示标识。 当待上报的 CSI信息与此前上报的 CSI信息相同时,基站沿 用 UE此前上报的 CSI信息作为选择下行链路 MCS的依据之一, UE不需要向基 站重复上 4艮相同的 CSI信息。 由于指示标识的比特位小于 CSI信息的比特位,所 以与现有技术中 UE在每个上报子帧都上报 CSI信息相比, 可以在待上报的 CSI 信息与此前上报的 CSI信息相同的情况下避免重复上报相同的 CSI信息,由此节 省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN的信道变化相对较 慢、 UE上报的 CSI信息变化较小的场景, 可以节省大量的上行链路信令开销。 - - 进一步的, 本发明实施例还提供了一种信息上报的方法, 该方法应用于基 站侧。 如图 6所示, 所述方法包括:
601、 在周期性上报信道状态信息 CSI的过程中, 基站在上报子帧上接收 UE上 ^艮的指示标识。
所述指示标识用于指示 UE待上报的 CSI信息与 UE此前上报的 CSI信息是 否相同。 例如在图 1 ( a ) 中, 当 UE在上报子帧 2上待上报的 CSI信息与在上报 子帧 1上已上报的 CSI信息相同时, UE取消在上报子帧 2上上报 CSI信息, 并且 在上报子帧 2上向基站上报一个表征两者相同的指示标识。 基站在上报子帧 2 上接收该指示标识, 然后沿用 UE在上报子帧 1上上报的 CSI信息作为确定下一 阶段下行链路 DL所使用 MCS的依据之一。
所述指示标识的比特位少于 CSI信息的比特位, 例如所述指示标识可以为 一个 1到 4比特的标识 ,比特位可以为 0或 1。在本发明实施例的一个优选方案中 , 所述指示标识为一个 1比特的标识。
通常, 基站接收的 CSI信息中会携带 CQI、 PMI、 PTI或 RI中的至少一种指 示, UE通过一个一比特的标识表征待上报的 CSI信息中携带的至少一种指示与 此前上报的 CSI信息中携带的至少一种指示是否相同,当待上报的 CSI信息中携 带的所有指示均与此前上报的 CSI信息中携带的所有指示对应相同时, 该比特 表征待上报的 CSI信息与此前上报的 CSI信息相同。 一般 CQI占用 4个比特位, PMI占用 4个比特位, 第二码字 CQI或 PMI占用 3个比特位, PTI占用 1至 2个比特 位, RI占用 1至 3个比特位。 基站接收的 CSI信息中至少携带一个 CQI, 即基站 每次接收的 CSI信息最少为 4比特。 当 UE本次待上报的 CSI信息与此前上报的 CSI信息相同时, UE不上报相同的 CSI信息而是上报一个 1比特的指示标识, 由 此基站在本次接收过程中只接收一个 1比特的的指示标识, 在本次接收过程中 至少可以节省 3 ( 4-1=3 ) 比特的上行链路信令开销。
基站接收的指示标识通过相反的两个比特位表征先后发送的 CSI信息是否 相同。 例如, 当指示标识为 1时表示先后发送的 CSI信息相同, 当指示标识为 0 时表示先后发送的 CSI信息不相同, 或者当指示标识为 0时表示先后发送的 CSI 信息相同, 当指示标识为 1时表示先后发送的 CSI信息不相同。本发明实施例中 以指示标识为 0表示先后发送的 CSI信息相同,指示标识为 1表示先后发送的 CSI - - 信息不相同为例进行说明。
现有技术中, UE在上报 CSI信息之前不判断待上报的 CSI信息是否与此前 上报的 CSI信息是否相同, 而是在每个上报子帧上都上报一次 CSI信息,基站在 每个上报子帧上都接收一次 CSI信息。 在 SCN场景下, SCN的信道变化相对较 慢,基站接收的大多数 CSI信息都相同。这种重复接收相同 CSI信息的上报方式 对上行链路造成了不必要的信令开销。 本发明实施例提供的信息上报的方法, 能够在上报 CSI信息前由 UE对本次待上报的 CSI信息与此前上报的 CSI信息是 否相同进行判断, 然后基站接收 UE上报的一个用于表征两者是否相同的指示 标识。 当待上报的 CSI信息与此前上报的 CSI信息相同时, 基站沿用 UE此前上 报的 CSI信息作为选择下行链路 MCS的依据之一, 基站不接收 UE重复上报的 CSI信息。 由于指示标识的比特位小于 CSI信息的比特位,所以与现有技术中基 站在每个上报子帧都上接收 CSI信息相比,可以在待上报的 CSI信息与此前上报 的 CSI信息相同的情况下避免重复接收相同的 CSI信息,由此节省上行链路的信 令开销。 特别是对于 Pico eNB覆盖下 SCN的信道变化相对较慢、 UE上报的 CSI 信息变化较小的场景, 可以节省大量的上行链路信令开销。
进一步的, 作为对图 6所示方法的详细说明及进一步扩展, 当基站接收的 指示标识表征 UE待上报的 CSI信息与 UE此前上报的 CSI信息不相同时,基站接 收 UE上报的待上报的 CSI信息, 然后基站将 UE上报的 CSI信息作为选择下一阶 段下行链路 MCS的依据之一。
基站接收 UE上报的待上报 CSI信息的时机可以是在步骤 601之前、步骤 601 之后或者与步骤 601同时执行, 本发明实施例对此不做限制。 需要说明的是, 当待上报的 CSI信息与此前上报的 CSI信息不相同时,与现有技术相比,基站除 了接收待上报的 CSI信息以外还多接收了一个 1比特的指示标识,涉及的信令开 销比现有技术多 1比特。但是这并不与解决的技术问题相矛盾。这是因为在 SCN 场景下, UE反馈信道变化的 CSI信息变化较小, 大多数待上报的 CSI信息都与 此前上报的 CSI信息相同,所以从整体上看,在大多数上报的 CSI信息都与此前 上报的 CSI信息相同的情况下,本发明实施例在少数情况下多接收 1比特的指示 标识相对节省信令开销的整体效果而言, 其影响可以忽略不计。
进一步的, 在本发明实施例中, 当 UE首次向基站上报 CSI信息时, 即在 - -
UE上报本次 CSI信息之前没有上报过 CSI信息时,基站可以首先接收 UE发送的 一个或多个 CSI信息,以便为后续 UE上报 CSI信息提供可以进行判断的历史 CSI 信息。 具体的, 基站接收 UE发送的一个或多个 CSI信息的实现方式可以是下述 3种方式之一:
1 )基站接收 UE上报的一次 CSI信息。
在上报 CSI信息之初, UE首先发起一次非周期上报流程, 将反映当前信道 状态的 CSI信息上报给基站。
2 )基站向 UE发送非周期上报指示, 接收 UE根据该非周期上报指示上报 的 CSI信息。
在上报 CSI信息之初, 基站首先发起一次非周期上报流程, 向 UE发送非周 期上报指示, 指示 UE上报 CSI信息。 UE接收到非周期上报指示后, 向基站上 报一个或多个 CSI信息。此外,基站也可以像 UE发送多个非周期上报指示, UE 在每次接收到一个非周期上报指示时,向基站上报一次 CSI信息,该 CSI信息为 上报 CSI信息时反映当前信道状态的 CSI信息, 由此实现向基站上报多个 CSI信 息。
3 )基站接收 UE在预设时长内周期性上报的 CSI信息。
在上报 CSI信息之初, UE执行周期上报流程, 按照现有的实现方式周期性 向基站上报 CSI信息。 在一段时间后 (预设时长), UE停止现有的周期性上报 方式, 然后按照图 2所示的实现方式上报 CSI信息。所述预设时长大于上报时间 间隔,例如预设时长可以为 4个 Np, UE在按照现有实现方式上报 4个 CSI信息后 按照图 2所示的实现方式上报 CSI信息。在实际应用中所述预设时长可以根据信 道变化的特点进行设置, 例如在 SCN场景下信道变化较慢, 每次上报的 CSI信 息通常相同, 则可以设置一个较短的预设时长; 在 Macro eNB的小区场景下信 道变化相对较大, 则可以设置一个较长的预设时长。本发明实施例对预设时长 的设置不做限制。
或者, 在上报 CSI信息之初, UE执行周期上报流程, 按照现有的实现方式 周期性向基站上报 CSI信息。 当信道状态稳定后, UE上报的多个 CSI信息均相 同。 如果 UE连续上报的相同 CSI信息的数量超过预设数量, 例如超过 5个, 则 UE停止现有的周期性上报方式, 然后按照图 2所示的实现方式上报 CSI信息。 - - 本发明实施例同样不对预设时长的设置进行限制。
进一步的, 当基站接收的指示标识表征待上报的 CSI信息与此前上报的 CSI信息不相同时, 基站接收 UE上报的待上报的 CSI信息, 具体为: 基站在下 一个上报子帧上接收 UE上报的待上报 CSI信息, 或者基站向 UE发送非周期上 报指示, 然后接收 UE根据该非周期上报指示上报的待上报 CSI信息, 所述非周 期上报指示为基站根据 UE上报的指示标识发送的上报指示。
基站在下一个上报子帧上接收 UE上报的待上报的 CSI信息可以是在与接 收上报指示标识的上报子帧相邻的下一个上报子帧上接收 UE上报的待上报的 CSI信息。 例如对于宽带上报模式, 在图 3 ( a ) 中, 基站在上报子帧 3上接收 UE上报的指示标识 1 , 然后在上报子帧 4上接收 UE上报的待上报的 CSI信息, 该待上报的 CSI信息为 UE准备在上报子帧 3上上报的 CSI信息。
又例如对于频选上报模式, 在图 3 ( c ) 中, 基站在上报子帧 3上接收 UE上 报的指示标识 1 , 然后在上报子帧 4上接收 UE上报的待上报的 CSI信息, 该待上 报的 CSI信息为 UE准备在上报子帧 3上上报的 SB2的 CSI信息。 然后从上报子帧 5开始, 基站顺序接收 UE上报的 SB3、 WB、 SB1的指示标识。
此外, 基站可以不在下一个相邻的上报子帧上接收 UE上报的待上报 CSI 信息, 而是向 UE发送一个非周期上报指示。 例如, 基站在接收到 UE上报的指 示标识 1后, 向 UE发送一个非周期上报指示, 指示 UE触发一个非周期上报流 程. UE接收到非周期上报指示后,向基站上报待上报的 CSI信息。例如在图 3 ( b ) 所示的宽带上报模式中, 基站在上报子帧 3上接收 UE上报的指示标识 1 , 然后 在上报子帧 3之后的某个子帧 X上接收基站发送的非周期上报指示, 在子帧 X+k ms (FDD k=4,TDD k=4,5,6,7)(例如上报子帧 x+4 ms )上上报待上报的 CSI信息, 该待上报的 CSI信息为 UE准备在上报子帧 3上上报的 CSI信息。
又例如在图 3 ( d )所示的频选上报模式中, UE在上报子帧 3上向基站上报 指示标识 1 , 然后在上报子帧 3之后的某个子帧 X上接收到基站发送的非周期上 报指示, 然后 UE在子帧 X+k ms (FDD k=4,TDD k=4,5,6,7) (例如上报子帧 x+4 ms上上报待上报的 CSI信息,该待上报的 CSI信息为 UE准备在上报子帧 3上上报 的 SB2的 CSI信息。
所述在下一个上报子帧上接收 UE上报的待上报的 CSI信息还可以是在与 - - 上报指示标识的上报子帧对应的下一个上报子帧上接收 UE上报的待上报的 CSI信息。 例如在频选上报模式中, 基站可以在下一个相邻的上报子带周期中 与 UE上报指示标识的上报子帧对应的上报子帧上 (即与接收上报指示标识的 上报子帧对应的下一个相邻上报子带周期上报子帧), 接收 UE上报的待上报 CSI信息, 所述上报子带周期包含上报一次多个子带 CSI信息的多个上报子帧。 例如在图 1 (c)中, 上报子帧 2至上报子帧 4依次为上报 SB1、 SB2和 SB3的上报 子帧, 即上报子帧 1至上报子帧 4之间的 3个 Np组成一个子带周期。 具体的, 如 图 4 (a)所示, 基站在上报子帧 3上接收 UE上报的 SB2 ( 1 ) 的指示标识 1, 然 后在上报子帧 4和上报子帧 5上顺序接收 UE上报的 SB3 ( 1 )和 SB1 (2)的指示 标识 0。 其中, (1 )表示本宽带周期内的第一个子带周期, (2)表示本宽带周 期内的第二个子带周期。 在上报子帧 6上(SB2的第二子带周期上报子帧), 基 站接收 UE上报的 SB2 ( 1 )的 CSI信息,接着在上报子帧 7和上报子帧 8上基站顺 序接收 UE上报的 SB3 (2)和第二宽带周期的 WB的指示标识 1, 在上报子帧 9 和上报子帧 10上顺序接收 UE上报的第二宽带周期的 SB1 ( 1 )和 SB2 ( 1 )的指 示标识 0。 在上报子帧 11 (SB3的第一子带周期上报子帧)上, 基站接收 UE上 报的第一宽带周期 SB3 (2) 的 CSI信息, 在上报子帧 15 (WB的第三宽带周期 的上报子帧)上接收 UE上报的第二宽带周期的 WB的 CSI信息, 以此类推。
此外,在频选上报模式中,基站也可以在下一个相邻的上报宽带周期中与 UE上报指示标识的上报子帧对应的上报子帧上 (即与接收上报指示标识的上 报子帧对应的下一个相邻上报宽带周期上报子帧), 接收 UE上报的待上报 CSI 信息, 所述上报宽带周期包含一个上报宽带 CSI信息的上报子帧以及多个子带 周期的上报子帧。 例如在图 1 (c)中, 上报子帧 1至上报子帧 7依次为上报 WB、 SB1 ( 1 )、 SB2 ( 1 )、 SB3 ( 1 )、 SB1 (2 )、 SB2 (2)和 SB3 ( 2 ) 的上 4艮子帧, 即上 ·^艮子帧 1至上 ·^艮子帧 7的 7个 Np组成一个宽带周期。 具体的, 如图 4 (b)所 示, 基站在上报子帧 1至 7上顺序接收 UE上报的 WB、 SB1 ( 1 )、 SB2 ( 1 )、 SB3 ( 1)、 SB1 (2)、 SB2 ( 2 )和 SB3 (2) 的指示标识依次为 0、 0、 1、 0、 0、 0 和 1, 其中上报子帧 3和上报子帧 7上分别接收 SB2 ( 1 )和 SB3 (2)的指示标识 1。 在第二宽带周期内上报 SB2 ( 1 ) (上报子帧 10)和 SB3 (2) (上报子帧 14) 的上报子帧上,基站分别将接收 UE上报的第一宽带周期中 SB2 ( 1 )和 SB3 (2) - - 的 CSI信息。
进一步的, 当所述 CSI信息为 CQI和 PMI的组合时, 所述指示标识占用 2个 比特位,其中一个比特位代表待上报的 CSI信息中的 CQI与此前上报的 CSI信息 中的 CQI是否相同,另一个比特位代表待上报的 CSI信息中的 PMI与此前上报的 CSI信息中的 PMI是否相同。 如果待上报的 CSI信息中的 CQI和 PMI均与此前上 报的 CSI信息中的 CQI和 PMI不相同, 则在上报指示标识 11后, 基站接收 UE上 报的待上报的 CSI信息中的 CQI和 PMI。 如果待上报的 CSI信息中的 CQI和 PMI 中有一项指示与此前上报的 CSI信息中的 CQI或 PMI不相同, 则在接收 UE上报 的指示标识 10或 01后, 基站接收 UE上报的 CSI信息中不同的待上报指示, 或者 基站接收 UE上报的待上报的 CSI信息中的 CQI和 PMI。
具体的, 以宽带上报模式为例, 如图 5所示, 在上报子帧 1上基站接收 UE 上报的指示标识 00, 其中第一个 0为 CQI的指示标识, 表示本次待上报的 CQI 与此前上报的 CQI相同; 第二个 0为 PMI的指示标识, 表示本次待上报的 PMI与 此前上报的 PMI相同。 在上报子帧 3上基站接收 UE上报的指示标识 10, 其中第 一个 1为 CQI的指示标识, 表示本次待上报的 CQI与此前上报的 CQI不相同; 第 二个 0为 PMI的指示标识, 表示本次待上报的 PMI与此前上报的 PMI相同。 在上 报子帧 5上基站接收 UE上报的指示标识 11 ,其中第一个 1为 CQI的指示标识,表 示本次待上报的 CQI与此前上报的 CQI相同; 第二个 1为 PMI的指示标识, 表示 本次待上报的 PMI与此前上报的 PMI不相同。 当 UE上报的内容为 00时基站后续 当 UE上报的内容为 11时, 基站在下一个相邻的上报子帧(例如图 5中的上报子 帧 6 )或通过非周期上报指示接收 UE上报的本次待上报的 CQI及 PMI (上报子 帧 5上待上报的 CQI及 PMI ); 当 UE上报的内容为 10时, 在下一个相邻的上报子 帧 (例如图 5中的上报子帧 4 )或通过非周期上报指示接收 UE上报的本次待上 行链路的信令开销, 基站还可以仅接收 UE上报的、 与此前上报的不同的指示。 例如, 在图 5中, 上报子帧 3上报 10, 则在上报子帧 4上基站仅接收 UE在上报子 帧 3上待上报的 CQI, 而不接收 UE在上报子帧 3上待上报的 PMI。
图 5中以 CSI信息包含两个指示为例进行了说明, 实际应用中, CSI信息中 - - 包含几个指示 UE就可以上报几个比特的指示标识, 然后根据上报的多比特指 示标识上报待上报的一个或全部指示, 本发明实施例对此不再赘述。
图 5以宽带上报模式为例对 UE上报多比特指示标识进行了说明,在频选上 报模式中基站也可以基于相同的上报方式接收 UE上报的多比特指示标识, 此 处同样不再赘述。
在 LTE-A的 Rel-10/11/12版本协议中, 宽带上报模式可以为模式(mode ) 1-0和 model-1 ,频选上报模式可以为 mode2-0和 mode2-l。
Figure imgf000030_0001
中, 基站不接收 PMI, 在实际应用中, 基站可以按照图 3或图 4所示的上报模式 接收 UE上报的 CSI信息。 在 model-1和 mode2-l中, 基站接收 UE上报的 CQI和 PMI, 在实际应用中, 基站可以按照图 5所示的上报模式接收 UE上报的 CSI信 息。
可选的, 在执行步骤 601之前, 基站还可以向 UE发送新模式指示信令, 该 新模式指示信令用于指示 UE按照图 2所示的上报方式向基站上报 CSI信息。 在 向 UE发送新模式指示信令之前, UE按照现有的上报方式向基站上报 CSI信息, 当基站向 UE发送新模式指示信令后, UE按照图 2所示的上报方式上报 CSI信 息。
现有技术中, UE在上报 CSI信息之前不判断待上报的 CSI信息是否与此前 上报的 CSI信息是否相同, 而是在每个上报子帧上都上报一次 CSI信息,基站在 每个上报子帧上都接收一次 CSI信息。 在 SCN场景下, SCN的信道变化相对较 慢,基站接收的大多数 CSI信息都相同。这种重复接收相同 CSI信息的上报方式 对上行链路造成了不必要的信令开销。 本发明实施例提供的信息上报的方法, 能够在上报 CSI信息前由 UE对本次待上报的 CSI信息与此前上报的 CSI信息是 否相同进行判断, 然后基站接收 UE上报的一个用于表征两者是否相同的指示 标识。 当待上报的 CSI信息与此前上报的 CSI信息相同时, 基站沿用 UE此前上 报的 CSI信息作为选择下行链路 MCS的依据之一, 基站不接收 UE重复上报的 CSI信息。 由于指示标识的比特位小于 CSI信息的比特位,所以与现有技术中基 站在每个上报子帧都上接收 CSI信息相比,可以在待上报的 CSI信息与此前上报 的 CSI信息相同的情况下避免重复接收相同的 CSI信息,由此节省上行链路的信 令开销。 特别是对于 Pico eNB覆盖下 SCN的信道变化相对较慢、 UE上报的 CSI - - 信息变化较 ' j、的场景, 可以节省大量的上行链路信令开销。
本发明实施例对基于 Pico eNB覆盖下的 SCN场景进行了说明, 实际应用 中, 本发明实施例提供的信息上报的方法同样适用于在 Macro eNB覆盖下的小 区场景。
参考图 2所示方法的实现, 本发明实施例还提供了一种用户设备 UE, 用以 实现图 2所示的方法。 如图 7所示, 所述用户设备包括: 信息上 4艮单元 71、 判断 单元 72、 标识上报单元 73以及接收单元 74, 其中,
所述信息上报单元 71 , 用于在周期性上报信道状态信息 CSI的过程中, 向 基站上报 CSI信息;
所述判断单元 72, 用于判断待上报的 CSI信息与所述信息上报单元 71此前 上报的 CSI信息是否相同, 以得到判断结果;
所述标识上报单元 73 ,用于根据所述判断单元 72的判断结果在上报子帧向 基站上报指示标识, 所述指示标识用于表征所述待上报的 CSI信息与所述此前 上报的 CSI信息是否相同,其中,所述指示标识的比特位少于 CSI信息的比特位。 为所述待上报的 CSI信息与所述此前上报的 CSI信息不相同时,向所述基站上报 所述待上报的 CSI信息。
进一步的, 所述信息上报单元 71还用于当在上报本次 CSI信息之前没有上 报过 CSI信息时:
向所述基站上报一次 CSI信息;
接收所述基站发送的非周期上报指示,根据所述非周期上报指示向所述基 站上报 CSI信息;
在预设时长内向所述基站周期性上报 CSI信息;
向所述基站周期性上报 CSI信息, 当上报的相同 CSI信息的数量超过预设 数量时, 结束周期性上报 CSI信息。
进一步的, 如图 8所示, 所述判断单元 72具体包括:
第一判断子单元 81 , 用于判断所述待上报的 CSI信息与所述此前上报的 CSI信息是否完全相等,如果判断结果为是,则确定所述待上报的 CSI信息与所 述此前上报的 CSI信息相同, 否则不相同; - - 第二判断子单元 82 , 用于判断所述待上报的 CSI信息与所述此前上报的 CSI信息之间的差值是否超过预设阈值, 如果判断结果为否, 则确定所述待上 报的 CSI信息与所述此前上报的 CSI信息相同, 否则不相同。
所述信息上报单元 71具体包括:
第一上报子单元 83 ,用于在下一个上报子帧上向所述基站上报所述待上报 的 CSI信息;
第二上报子单元 84, 用于接收所述基站发送的非周期上报指示,根据所述 非周期上报指示向所述基站上报所述待上报的 CSI信息。
进一步的, 所述第一上报子单元 83具体用于, 在频选上报模式下: 在与所述上报子帧相邻的下一个上报子帧上,向所述基站上报所述待上报 的 CSI信息;
在下一个相邻的子带上报周期中,与所述上报子帧对应的下一个上报子帧 上, 向所述基站上报所述待上报的 CSI信息, 所述子带上报周期包含上报一次 多个子带 CSI信息的多个上报子帧;
在下一个相邻的宽带上报周期中,与所述上报子帧对应的下一个上报子帧 上, 向所述基站上报所述待上报的 CSI信息, 所述宽带上报周期包含一个上报 宽带 CSI信息的上报子帧以及多个子带上报周期的上报子帧。
进一步的, 所述信息上报单元 71上报的所述 CSI信息为下述任意一种指示 或至少两种指示的组合:
信道质量指示 CQI、 预编码矩阵指示 PMI、 预编码类型指示 PTI和秩指示
RI。
进一步的, 所述标识上报单元 73上报的所述指示标识占用至少一个比特 位;
所述标识上报单元 73上报的所述比特位为 0表示待上报的 CSI信息中的至 少一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示 待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示 不相同;
所述标识上报单元 73上报的所述比特位为 1表示待上报的 CSI信息中的至 少一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 0表示 - - 待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示 不相同。
进一步的 ,所述标识上 4艮单元 73还用于当所述 CSI信息为 CQI和 PMI的组合 时, 上报的所述指示标识占用 2个比特位, 其中一个比特位用于表征待上报的 CSI信息中的 CQI与此前上报的 CSI信息中的 CQI是否相同, 另一个比特位用于 表征待上报的 CSI信息中的 PMI与此前上报的 CSI信息中的 PMI是否相同;
所述信息上报单元 71具体用于:
当待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI和 PMI不相同时, 向所述基站上报待上报的 CSI信息中的 CQI和 PMI;
当待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信息 中的 CQI或 PMI不相同时,向所述基站上报与此前上报的 CSI信息中不同的待上 报指示, 或者将待上报的 CSI信息中的 CQI和 PMI均上报给所述基站。
所述接收单元 74, 用于在所述判断单元 72判断待上报的 CSI信息与所述信 息上报单元此前上报的 CSI信息是否相同之前, 接收所述基站发送的新模式指 示信令, 所述新模式指示信令用于指示所述用户设备按照图 2所示的方法上报 指示标识。
本发明实施例提供的用户设备, 能够在上报 CSI信息前对本次待上报的 CSI信息与此前上报的 CSI信息是否相同进行判断,然后向基站上报一个用于表 征两者是否相同的指示标识。 当待上报的 CSI信息与此前上报的 CSI信息相同 时, 基站沿用 UE此前上报的 CSI信息作为选择下行链路 MCS的依据之一, UE 不需要向基站重复上报相同的 CSI信息。由于指示标识的比特位小于 CSI信息的 比特位, 所以与现有技术中 UE在每个上报子帧都上报 CSI信息相比, 可以在待 上报的 CSI信息与此前上报的 CSI信息相同的情况下避免重复上报相同的 CSI 信息, 由此节省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN的信道 变化相对较慢、 UE上报的 CSI信息变化较小的场景, 可以节省大量的上行链路 信令开销。
参考图 6所示方法的实现, 本发明实施例还提供了一种基站, 用以实现图 6 所示的方法。 如图 9所示, 所述基站包括: 标识接收单元 91、 信息接收单元 92、 指示发送单元 93以及模式切换指示单元 94, 其中, - - 所述标识接收单元 91 , 用于在周期性上报信道状态信息 CSI的过程中, 在 上报子帧上接收 UE上报的指示标识, 所述指示标识用于表征所述 UE待上报的 CSI信息与所述 UE此前上报的 CSI信息是否相同, 其中, 所述指示标识的比特 位少于 CSI信息的比特位。
所述信息接收单元 92 ,用于当所述标识接收单元 91接收的所述指示标识表 征所述待上报的 CSI信息与所述此前上报的 CSI信息不相同时, 接收所述 UE上 报的所述待上报的 CSI信息。
进一步的, 所述信息接收单元 92还用于, 在所述 UE上报 CSI信息之初, 接 收所述 UE上报的一次 CSI信息;
所述指示发送单元 93 , 用于在所述 UE上报 CSI信息之初, 向所述 UE发送 非周期上报指示, 所述信息接收单元 92还用于接收所述 UE根据所述非周期上 报指示上报的 CSI信息;
所述信息接收单元 92还用于, 在所述 UE上报 CSI信息之初, 接收所述 UE 在预设时长内周期性上报的 CSI信息。
进一步的, 所述信息接收单元 92具体用于:
在下一个上报子帧上接收所述 UE上报的所述待上报的 CSI信息;
所述指示发送单元 93还用于向所述 UE发送非周期上报指示;
所述信息接收单元 92还具体用于接收所述 UE根据所述非周期上报指示上 报的所述待上报的 CSI信息。
进一步的, 如图 10所示, 所述信息接收单元 92具体包括:
第一接收子单元 1001 , 用于在与所述上报子帧相邻的下一个上报子帧上, 接收所述 UE上报的所述待上报的 CSI信息;
第二接收子单元 1002, 用于在下一个相邻的子带上报周期中, 与所述上报 子帧对应的下一个上报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所 述子带上报周期包含上报一次多个子带 CSI信息的多个上报子帧;
第三接收子单元 1003 , 用于在下一个相邻的宽带上报周期中, 与所述上报 子帧对应的下一个上报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所 述宽带上报周期包含一个上报宽带 CSI信息的上报子帧以及多个子带上报周期 的上报子帧。 - - 进一步的, 所述信息接收单元 92接收的所述 CSI信息为下述任意一种指示 或至少两种指示的组合:
信道质量指示 CQI、 预编码矩阵指示 PMI、 预编码类型指示 PTI和秩指示
RI。
进一步的, 所述标识接收单元 91接收的所述指示标识占用至少一个比特 位;
所述标识接收单元 91接收的所述比特位为 0表示待上报的 CSI信息中的至 少一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示 待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示 不相同;
所述标识接收单元 91接收的所述比特位为 1表示待上报的 CSI信息中的至 少一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 0表示 待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示 不相同。
进一步的, 当所述 CSI信息为 CQI和 PMI的组合时, 所述标识接收单元 91 接收的指示标识占用 2个比特位,其中一个比特位用于表征待上报的 CSI信息中 的 CQI与此前上报的 CSI信息中的 CQI是否相同,另一个比特位用于表征待上报 的 CSI信息中的 PMI与此前上报的 CSI信息中的 PMI是否相同;
所述信息接收单元 92具体用于:
当待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI和
PMI不相同时, 接收所述 UE上报的待上报的 CSI信息中的 CQI和 PMI;
当待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信息 中的 CQI或 PMI不相同时, 接收所述 UE上报的与此前上报的 CSI信息中不同的 待上报指示, 或者接收所述 UE上报的待上报的 CSI信息中的 CQI和待上报的 PML
所述模式切换指示单元 94,用于在所述标识接收单元 91在上报子帧接收所 述 UE上报的指示标识之前, 向所述 UE发送新模式指示信令, 所述新模式指示 信令用于指示所述 UE按照图 2所示的方法上报 CSI信息。
本发明实施例提供的基站, 能够在上报 CSI信息前由 UE对本次待上报的 - -
CSI信息与此前上报的 CSI信息是否相同进行判断, 然后基站接收 UE上报的一 个用于表征两者是否相同的指示标识。 当待上报的 CSI信息与此前上报的 CSI 信息相同时,基站沿用 UE此前上报的 CSI信息作为选择下行链路 MCS的依据之 一, 基站不接收 UE重复上报的 CSI信息。 由于指示标识的比特位小于 CSI信息 的比特位, 所以与现有技术中基站在每个上报子帧都上接收 CSI信息相比, 可 以在待上报的 CSI信息与此前上报的 CSI信息相同的情况下避免重复接收相同 的 CSI信息, 由此节省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN 的信道变化相对较慢、 UE上报的 CSI信息变化较小的场景, 可以节省大量的上 行链路信令开销。
参考上述实施例的实现, 本发明实施例还提供了一种信息上报的系统。如 图 11所示,所述系统包括用户设备 UE1101和基站 1102, 所述 UE1101为图 7或图 8中所示的用户设备, 所述基站 1102为图 9 或图 10 所示的基站。 其中:
所述 UE1101 , 用于在周期性上报信道状态信息 CSI的过程中, 判断待上报 的 CSI信息与此前上报的 CSI信息是否相同,以得到判断结果,根据判断结果向 所述基站 1102上报指示标识;
所述基站 1102 , 用于在上报子帧上接收所述 UE1101上报的指示标识, 所 述指示标识用于表征所述 UE1101待上报的 CSI信息与所述 UE1101此前上报的 CSI信息是否相同, 其中, 所述指示标识的比特位少于 CSI信息的比特位。
本发明实施例提供的信息上报的系统,能够在上报 CSI信息前由 UE对本次 待上报的 CSI信息与此前上报的 CSI信息是否相同进行判断,然后向基站上报一 个用于表征两者是否相同的指示标识。 当待上报的 CSI信息与此前上报的 CSI 信息相同时,基站沿用 UE此前上报的 CSI信息作为选择下行链路 MCS的依据之 一,UE不需要向基站重复上报相同的 CSI信息。由于指示标识的比特位小于 CSI 信息的比特位, 所以与现有技术中 UE在每个上报子帧都上报 CSI信息相比, 可 以在待上报的 CSI信息与此前上报的 CSI信息相同的情况下避免重复上报相同 的 CSI信息, 由此节省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN 的信道变化相对较慢、 UE上报的 CSI信息变化较小的场景, 可以节省大量的上 行链路信令开销。
参考图 2所示方法的实现, 本发明实施例还提供了一种用户设备 UE, 用以 - - 实现图 2所示的方法。 如图 12所示, 所述用户设备包括: 发送器 1201、 处理器 1202以及接收器 1203 , 其中,
所述发送器 1201 , 用于在周期性上报信道状态信息 CSI的过程中, 向基站 上报 CSI信息;
所述处理器 1202, 用于判断待上报的 CSI信息与所述发送器 1201此前上报 的 CSI信息是否相同, 以得到判断结果;
所述发送器 1201还用于根据所述处理器 1202的判断结果在上报子帧向基 站上报指示标识, 所述指示标识用于表征所述待上报的 CSI信息与所述此前上 报的 CSI信息是否相同, 其中, 所述指示标识的比特位少于 CSI信息的比特位。
进一步的,所述发送器 1201还用于当所述处理器 1202的所述判断结果为所 述待上报的 CSI信息与所述此前上报的 CSI信息不相同时,向所述基站上报所述 待上报的 CSI信息。
进一步的, 所述发送器 1201还用于当在上报本次 CSI信息之前没有上报过 CSI信息时:
向所述基站上报一次 CSI信息;
接收所述基站发送的非周期上报指示,根据所述非周期上报指示向所述基 站上报 CSI信息;
在预设时长内向所述基站周期性上报 CSI信息;
向所述基站周期性上报 CSI信息, 当上报的相同 CSI信息的数量超过预设 数量时, 结束周期性上报 CSI信息。
进一步的, 所述处理器 1202具体用于:
判断所述待上报的 CSI信息与所述此前上报的 CSI信息是否完全相等, 如 果判断结果为是, 则确定所述待上报的 CSI信息与所述此前上报的 CSI信息相 同, 否则不相同;
判断所述待上报的 CSI信息与所述此前上报的 CSI信息之间的差值是否超 过预设阈值, 如果判断结果为否, 则确定所述待上报的 CSI信息与所述此前上 报的 CSI信息相同, 否则不相同。
所述发送器 1201具体用于:
在下一个上报子帧上向所述基站上报所述待上报的 CSI信息; - - 接收所述基站发送的非周期上报指示,根据所述非周期上报指示向所述基 站上报所述待上报的 CSI信息。
进一步的, 所述发送器 1201具体用于, 在频选上 4艮模式下:
在与上报所述上报子帧相邻的下一个上报子帧上,向所述基站上报所述待 上报的 CSI信息;
在下一个相邻的子带上 ·^艮周期中,与上 所述上 ·^艮子帧对应的下一个上 4艮 子帧上, 向所述基站上报所述待上报的 CSI信息, 所述子带上报周期包含上报 一次多个子带 CSI信息的多个上报子帧;
在下一个相邻的宽带上艮周期中,与上 所述上艮子帧对应的下一个上 4艮 子帧上, 向所述基站上报所述待上报的 CSI信息, 所述宽带上报周期包含一个 上报宽带 CSI信息的上报子帧以及多个子带上报周期的上报子帧。
进一步的, 所述发送器 1201上报的所述 CSI信息为下述任意一种指示或至 少两种指示的组合:
信道质量指示 CQI、 预编码矩阵指示 PMI、 预编码类型指示 PTI和秩指示 RI。
进一步的, 所述发送器 1201上报的所述指示标识占用至少一个比特位; 所述发送器 1201上报的所述比特位为 0表示待上报的 CSI信息中的至少一 个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示待上 报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示不相 同;
所述发送器 1201上报的所述比特位为 1表示待上报的 CSI信息中的至少一 个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 0表示待上 报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示不相 同。
进一步的, 所述发送器 1201还用于当所述 CSI信息为 CQI和 PMI的组合时, 上报的所述指示标识占用 2个比特位, 其中一个比特位用于表征待上报的 CSI 信息中的 CQI与此前上报的 CSI信息中的 CQI是否相同,另一个比特位用于表征 待上报的 CSI信息中的 PMI与此前上报的 CSI信息中的 PMI是否相同;
当待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI和 - -
PMI不相同时, 向所述基站上报待上报的 CSI信息中的 CQI和 PMI;
当待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信息 中的 CQI或 PMI不相同时,向所述基站上报与此前上报的 CSI信息中不同的待上 报指示, 或者将待上报的 CSI信息中的 CQI和 PMI均上报给所述基站。
所述接收器 1203 , 用于在所述处理器 1202判断待上报的 CSI信息与所述发 送器 1201此前上报的 CSI信息是否相同之前, 接收所述基站发送的新模式指示 信令,所述新模式指示信令用于指示所述用户设备按照图 2所示的方法上报 CSI 信息。
本发明实施例提供的用户设备, 能够在上报 CSI信息前对本次待上报的 CSI信息与此前上报的 CSI信息是否相同进行判断,然后向基站上报一个用于表 征两者是否相同的指示标识。 当待上报的 CSI信息与此前上报的 CSI信息相同 时, 基站沿用 UE此前上报的 CSI信息作为选择下行链路 MCS的依据之一, UE 不需要向基站重复上报相同的 CSI信息。由于指示标识的比特位小于 CSI信息的 比特位, 所以与现有技术中 UE在每个上报子帧都上报 CSI信息相比, 可以在待 上报的 CSI信息与此前上报的 CSI信息相同的情况下避免重复上报相同的 CSI 信息, 由此节省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN的信道 变化相对较慢、 UE上报的 CSI信息变化较小的场景, 可以节省大量的上行链路 信令开销。
参考图 6所示方法的实现, 本发明实施例还提供了一种基站, 用以实现图 6 所示的方法。 如图 13所示, 所述基站包括: 接收器 1301以及发送器 1302其中, 所述接收器 1301 , 用于在周期性上报信道状态信息 CSI的过程中, 在上报 子帧上接收 UE上报的指示标识, 所述指示标识用于表征所述 UE待上报的 CSI 信息与所述 UE此前上报的 CSI信息是否相同, 其中, 所述指示标识的比特位少 于 CSI信息的比特位。
所述接收器 1301 , 用于当接收的所述指示标识表征所述待上报的 CSI信息 与所述此前上报的 CSI信息不相同时, 接收所述 UE上报的所述待上报的 CSI信 息。
进一步的, 所述接收器 1301还用于, 在所述 UE上报 CSI信息之初, 接收所 述 UE上报的一次 CSI信息; - - 所述发送器 1302 , 用于在所述 UE上报 CSI信息之初, 向所述 UE发送非周 期上报指示, 所述接收器 1301还用于接收所述 UE根据所述非周期上报指示上 报的 CSI信息;
所述接收器 1301还用于, 在所述 UE上报 CSI信息之初, 接收所述 UE在预 设时长内周期性上报的 CSI信息。
进一步的, 所述接收器 1301具体用于:
在下一个上报子帧上接收所述 UE上报的所述待上报的 CSI信息; 所述发送器 1302还用于向所述 UE发送非周期上报指示;
所述接收器 1301还具体用于接收所述 UE根据所述非周期上报指示上报的 所述待上报的 CSI信息。
进一步的, 所述接收器 1301具体用于:
在与所述上报子帧相邻的下一个上报子帧上, 接收所述 UE上报的所述待 上报的 CSI信息;
在下一个相邻的子带上报周期中,与所述上报子帧对应的下一个上报子帧 上, 接收所述 UE上报的所述待上报的 CSI信息, 所述子带上报周期包含上报一 次多个子带 CSI信息的多个上 ·^艮子帧;
在下一个相邻的宽带上报周期中,与所述上报子帧对应的下一个上报子帧 上, 接收所述 UE上报的所述待上报的 CSI信息, 所述宽带上报周期包含一个上 报宽带 CSI信息的上报子帧以及多个子带上报周期的上报子帧。
进一步的, 所述接收器 1301接收的所述 CSI信息为下述任意一种指示或至 少两种指示的组合:
信道质量指示 CQI、 预编码矩阵指示 PMI、 预编码类型指示 PTI和秩指示
RI。
进一步的, 所述接收器 1301接收的所述指示标识占用至少一个比特位; 所述接收器 1301接收的所述比特位为 0表示待上报的 CSI信息中的至少一 个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示待上 报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示不相 同;
所述接收器 1301接收的所述比特位为 1表示待上报的 CSI信息中的至少一 - - 个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 0表示待上 报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示不相 同。
进一步的, 当所述 CSI信息为 CQI和 PMI的组合时,所述接收器 1301接收的 指示标识占用 2个比特位, 其中一个比特位用于表征待上报的 CSI信息中的 CQI 与此前上报的 CSI信息中的 CQI是否相同, 另一个比特位用于表征待上报的 CSI 信息中的 PMI与此前上报的 CSI信息中的 PMI是否相同;
所述接收器 1301具体用于:
当待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI和 PMI不相同时, 接收所述 UE上报的待上报的 CSI信息中的 CQI和 PMI;
当待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信息 中的 CQI或 PMI不相同时, 接收所述 UE上报的与此前上报的 CSI信息中不同的 待上报指示, 或者接收所述 UE上报的待上报的 CSI信息中的 CQI和待上报的 PML
所述发送器 1302还用于在所述接收器 1301接收 UE上报的指示标识之前, 向所述 UE发送新模式指示信令, 所述新模式指示信令用于指示所述 UE按照图 2所示的方法上 "^CSI信息。
本发明实施例提供的基站, 能够在上报 CSI信息前由 UE对本次待上报的 CSI信息与此前上报的 CSI信息是否相同进行判断, 然后基站接收 UE上报的一 个用于表征两者是否相同的指示标识。 当待上报的 CSI信息与此前上报的 CSI 信息相同时,基站沿用 UE此前上报的 CSI信息作为选择下行链路 MCS的依据之 一, 基站不接收 UE重复上报的 CSI信息。 由于指示标识的比特位小于 CSI信息 的比特位, 所以与现有技术中基站在每个上报子帧都上接收 CSI信息相比, 可 以在待上报的 CSI信息与此前上报的 CSI信息相同的情况下避免重复接收相同 的 CSI信息, 由此节省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN 的信道变化相对较慢、 UE上报的 CSI信息变化较小的场景, 可以节省大量的上 行链路信令开销。
参考上述实施例的实现, 本发明实施例还提供了一种信息上报的系统。如 图 14所示, 所述系统包括用户设备 UE1401和基站 1402 , 所述 UE1401为图 12中 - - 所示的用户设备, 所述基站 1402为图 13 所示的基站。 其中:
所述 UE1401 , 用于在周期性上报信道状态信息 CSI的过程中, 判断待上报 的 CSI信息与此前上报的 CSI信息是否相同,以得到判断结果,根据判断结果向 所述基站 1402上报指示标识;
所述基站 1402 , 用于在上报子帧上接收所述 UE1401上报的指示标识, 所 述指示标识用于表征所述 UE1401待上报的 CSI信息与所述 UE1401此前上报的 CSI信息是否相同, 其中, 所述指示标识的比特位少于 CSI信息的比特位。
本发明实施例提供的信息上报的系统,能够在上报 CSI信息前由 UE对本次 待上报的 CSI信息与此前上报的 CSI信息是否相同进行判断,然后向基站上报一 个用于表征两者是否相同的指示标识。 当待上报的 CSI信息与此前上报的 CSI 信息相同时,基站沿用 UE此前上报的 CSI信息作为选择下行链路 MCS的依据之 一,UE不需要向基站重复上报相同的 CSI信息。由于指示标识的比特位小于 CSI 信息的比特位, 所以与现有技术中 UE在每个上报子帧都上报 CSI信息相比, 可 以在待上报的 CSI信息与此前上报的 CSI信息相同的情况下避免重复上报相同 的 CSI信息, 由此节省上行链路的信令开销。 特别是对于 Pico eNB覆盖下 SCN 的信道变化相对较慢、 UE上报的 CSI信息变化较小的场景, 可以节省大量的上 行链路信令开销。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本发 明可借助软件加必需的通用硬件的方式来实现, 当然也可以通过硬件,但很多 情况下前者是更佳的实施方式。基于这样的理解, 本发明的技术方案本质上或 者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软 件产品存储在可读取的存储介质中, 如计算机的软盘, 硬盘或光盘等, 包括若 干指令用以使得一台计算机设备(可以是个人计算机, 服务器, 或者网络设备 等)执行本发明各个实施例所述的方法。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于 此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到 变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围应 所述以权利要求的保护范围为准。

Claims

权 利 要 求
1、 一种信息上报的方法, 其特征在于, 包括:
在周期性上报信道状态信息 CSI的过程中, 用户设备 UE判断待上报的 CSI信息与此前上报的 CSI信息是否相同, 以得到判断结果;
根据判断结果在上报子帧向基站上报指示标识,所述指示标识用于表征所 述待上报的 CSI信息与所述此前上报的 CSI信息是否相同,其中,所述指示标 识的比特位少于 CSI信息的比特位。
2、 根据权利要求 1所述的方法, 其特征在于, 所述方法进一步包括: 当 所述判断结果为所述待上 ·^艮的 CSI信息与所述此前上 ·^艮的 CSI信息不相同时, 向所述基站上报所述待上报的 CSI信息。
3、根据权利要求 1所述的方法, 其特征在于, 所述 UE判断待上报的 CSI 信息与此前上报的 CSI信息是否相同, 具体包括:
判断所述待上报的 CSI信息与所述此前上报的 CSI信息是否完全相等,如 果判断结果为是,则确定所述待上艮的 CSI信息与所述此前上 ·^艮的 CSI信息相 同, 否则不相同;
或者,判断所述待上报的 CSI信息与所述此前上报的 CSI信息之间的差值 是否超过预设阈值,如果判断结果为否,则确定所述待上报的 CSI信息与所述 此前上 ·^艮的 CSI信息相同, 否则不相同。
4、 根据权利要求 2所述的方法, 其特征在于, 所述向所述基站上报所述 待上报的 CSI信息, 具体包括:
在下一个上报子帧上向所述基站上报所述待上报的 CSI信息;
或者,接收所述基站发送的非周期上报指示,根据所述非周期上报指示向 所述基站上报所述待上报的 CSI信息。
5、 根据权利要求 4所述的方法, 其特征在于, 在频选上报模式下, 所述 在下一个上报子帧上向所述基站上报所述待上报的 CSI信息, 具体包括:
在与所述上报子帧相邻的下一个上报子帧上,向所述基站上报所述待上报 的 CSI信息;
或者,在下一个相邻的子带上 ·^艮周期中, 与所述上 子帧对应的下一个上 报子帧上, 向所述基站上报所述待上报的 CSI信息,所述子带上报周期包含上 报多个子带 CSI信息的多个上报子帧; 或者,在下一个相邻的宽带上 ·^艮周期中, 与所述上 子帧对应的下一个上 报子帧上, 向所述基站上报所述待上报的 CSI信息,所述宽带上报周期包含一 个上报宽带 CSI信息的上报子帧以及多个子带上报周期。
6、 根据权利要求 1至 5中任一项所述的方法, 其特征在于, 所述 CSI信 息为下述任意一种指示或至少两种指示的组合:
信道质量指示 CQI、预编码矩阵指示 PMI、预编码类型指示 PTI和秩指示
RI。
7、 根据权利要求 6所述的方法, 其特征在于, 所述指示标识占用至少一 个比特位;
所述比特位为 0表示待上报的 CSI信息中的至少一个指示与此前上报的
CSI信息中的至少一个指示相同,所述比特位为 1表示待上报的 CSI信息中的 至少一个指示与此前上报的 CSI信息中的至少一个指示不相同;
或者,所述比特位为 1表示待上报的 CSI信息中的至少一个指示与此前上 报的 CSI信息中的至少一个指示相同,所述比特位为 0表示待上报的 CSI信息 中的至少一个指示与此前上 ·^艮的 CSI信息中的至少一个指示不相同。
8、 根据权利要求 7所述的方法, 其特征在于, 当所述 CSI信息为 CQI和 PMI的组合时,所述指示标识占用 2个比特位, 其中一个比特位用于表征待上 报的 CSI信息中的 CQI与此前上报的 CSI信息中的 CQI是否相同, 另一个比 特位用于表征待上 ·^艮的 CSI信息中的 PMI与此前上 ·^艮的 CSI信息中的 PMI是 否相同;
所述向所述基站上报所述待上报的 CSI信息, 具体包括:
如果待上报的 CSI信息中的 CQI和 PMI均与此前上报的 CSI信息中的 CQI 和 PMI不相同, 则向所述基站上 4艮待上 ·^艮的 CSI信息中的 CQI和 ΡΜΙ;
如果待上报的 CSI信息中的 CQI和 ΡΜΙ中有一项指示与此前上报的 CSI 信息中的 CQI或 ΡΜΙ不相同, 则向所述基站上报与此前上报的 CSI信息中不 同的待上报指示, 或者将待上报的 CSI信息中的 CQI和 ΡΜΙ均上报给所述基 站。
9、 根据权利要求 1所述的方法, 其特征在于, 在所述用户设备 UE判断 待上报的 CSI信息与此前上报的 CSI信息是否相同之前,所述方法进一步包括: 接收所述基站发送的新模式指示信令,所述新模式指示信令用于指示所述 UE按照权利要求 1所述的方法上报 CSI信息。
10、 一种信息上报的方法, 其特征在于, 包括:
在周期性上报信道状态信息 CSI的过程中,基站在上报子帧上接收用户设 备 UE上报的指示标识, 所述指示标识用于表征所述 UE待上报的 CSI信息与 所述 UE此前上报的 CSI信息是否相同, 其中, 所述指示标识的比特位少于 CSI信息的比特位。
11、 根据权利要求 10所述的方法, 其特征在于, 所述方法进一步包括: 当所述指示标识表征所述待上 ·^艮的 CSI信息与所述此前上 ·^艮的 CSI信息不 相同时, 接收所述 UE上报的所述待上报的 CSI信息。
12、 根据权利要求 10所述的方法, 其特征在于, 所述接收所述 UE上报 的所述待上报的 CSI信息, 具体包括:
在下一个上报子帧上接收所述 UE上报的所述待上报的 CSI信息; 或者, 向所述 UE发送非周期上报指示, 接收所述 UE根据所述非周期上 报指示上报的所述待上报的 CSI信息。
13、 根据权利要求 12所述的方法, 其特征在于, 所述在下一个上报子帧 上接收所述 UE上报的所述待上报的 CSI信息, 具体包括:
在与所述上报子帧相邻的下一个上报子帧上,接收所述 UE上报的所述待 上报的 CSI信息;
或者,在下一个相邻的子带上 ·^艮周期中, 与所述上 子帧对应的下一个上 报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所述子带上报周期包 含上报多个子带 CSI信息的多个上报子帧;
或者,在下一个相邻的宽带上 ·^艮周期中, 与所述上 子帧对应的下一个上 报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所述宽带上报周期包 含一个上报宽带 CSI信息的上报子帧以及多个子带上报周期的上报子帧。
14、 根据权利要求 10至 13中任一项所述的方法, 其特征在于, 所述 CSI 信息为下述任意一种指示或至少两种指示的组合:
信道质量指示 CQI、预编码矩阵指示 PMI、预编码类型指示 PTI和秩指示
RI。
15、 根据权利要求 14所述的方法, 其特征在于, 所述指示标识占用至少 一个比特位; 所述比特位为 0表示待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示待上报的 CSI信息中的 至少一个指示与此前上报的 CSI信息中的至少一个指示不相同;
或者,所述比特位为 1表示待上报的 CSI信息中的至少一个指示与此前上 报的 CSI信息中的至少一个指示相同,所述比特位为 0表示待上报的 CSI信息 中的至少一个指示与此前上 ·^艮的 CSI信息中的至少一个指示不相同。
16、 根据权利要求 15所述的方法, 其特征在于, 当所述 CSI信息为 CQI 和 ΡΜΙ的组合时, 所述指示标识占用 2个比特位, 其中一个比特位用于表征 待上报的 CSI信息中的 CQI与此前上报的 CSI信息中的 CQI是否相同, 另一 个比特位用于表征待上报的 CSI信息中的 ΡΜΙ与此前上报的 CSI信息中的 ΡΜΙ 是否相同;
所述接收所述 UE上报的所述待上报的 CSI信息, 具体包括:
如果待上报的 CSI信息中的 CQI和 ΡΜΙ均与此前上报的 CSI信息中的 CQI 和 ΡΜΙ不相同, 则接收所述 UE上报的待上报的 CSI信息中的 CQI和 ΡΜΙ; 如果待上报的 CSI信息中的 CQI和 ΡΜΙ中有一项指示与此前上报的 CSI 信息中的 CQI或 ΡΜΙ不相同, 则接收所述 UE上报的与此前上报的 CSI信息 中不同的待上报指示, 或者接收所述 UE上报的待上报的 CSI信息中的 CQI 和 ΡΜΙ。
17、 根据权利要求 10所述的方法, 其特征在于, 在所述基站在上报子帧 接收用户设备 UE上报的指示标识之前, 所述方法进一步包括:
向所述 UE发送新模式指示信令, 所述新模式指示信令用于指示所述 UE 按照权利要求 1所述的方法上报 CSI信息。
18、 一种用户设备, 其特征在于, 包括:
信息上报单元,用于在周期性上报信道状态信息 CSI的过程中, 向基站上 "^ CSI信息;
判断单元, 用于判断待上报的 CSI信息与所述信息上报单元此前上报的 CSI信息是否相同, 以得到判断结果;
标识上报单元,用于根据所述判断单元的判断结果在上报子帧向基站上报 指示标识, 所述指示标识用于表征所述待上报的 CSI信息与所述此前上报的 CSI信息是否相同, 其中, 所述指示标识的比特位少于 CSI信息的比特位。
19、 根据权利要求 18所述的用户设备, 其特征在于, 所述信息上报单元 还用于当所述判断单元的所述判断结果为所述待上报的 CSI信息与所述此前 上报的 CSI信息不相同时, 向所述基站上报所述待上报的 CSI信息。
20、 根据权利要求 18所述的用户设备, 其特征在于, 所述判断单元具体 包括:
第一判断子单元,用于判断所述待上报的 CSI信息与所述此前上报的 CSI 信息是否完全相等,如果判断结果为是,则确定所述待上报的 CSI信息与所述 此前上 ·^艮的 CSI信息相同, 否则不相同;
第二判断子单元,用于判断所述待上报的 CSI信息与所述此前上报的 CSI 信息之间的差值是否超过预设阈值,如果判断结果为否, 则确定所述待上报的 CSI信息与所述此前上 ·^艮的 CSI信息相同, 否则不相同。
21、 根据权利要求 19所述的用户设备, 其特征在于, 所述信息上报单元 具体包括:
第一上报子单元,用于在下一个上报子帧上向所述基站上报所述待上报的 CSI信息;
第二上报子单元, 用于接收所述基站发送的非周期上报指示,根据所述非 周期上报指示向所述基站上报所述待上报的 CSI信息。
22、 根据权利要求 21所述的用户设备, 其特征在于, 所述第一上报子单 元具体用于, 在频选上 4艮模式下:
在与上报所述指示标识的所述上报子帧相邻的下一个上报子帧上,向所述 基站上报所述待上报的 CSI信息;
在下一个相邻的子带上报周期中,与所述上报子帧对应的下一个上报子帧 上, 向所述基站上报所述待上报的 CSI信息,所述子带上报周期包含上报一次 多个子带 CSI信息的多个上报子帧;
在下一个相邻的宽带上报周期中,与所述上报子帧对应的下一个上报子帧 上, 向所述基站上报所述待上报的 CSI信息,所述宽带上报周期包含一个上报 宽带 CSI信息的上报子帧以及多个子带上报周期的上报子帧。
23、 根据权利要求 18至 22中任一项所述的用户设备, 其特征在于, 所述 信息上报单元上报的所述 CSI信息为下述任意一种指示或至少两种指示的组 合: 信道质量指示 CQI、预编码矩阵指示 PMI、预编码类型指示 PTI和秩指示
RI。
24、 根据权利要求 23所述的用户设备, 其特征在于, 所述标识上报单元 上报的所述指示标识占用至少一个比特位;
所述标识上报单元上报的所述比特位为 0表示待上报的 CSI信息中的至少 一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示 待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示 不相同;
所述标识上报单元上报的所述比特位为 1表示待上报的 CSI信息中的至少 一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 0表示 待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示 不相同。
25、 根据权利要求 24所述的用户设备, 其特征在于, 所述标识上报单元 还用于当所述 CSI信息为 CQI和 PMI的组合时, 上 ·^艮的所述指示标识占用 2 个比特位, 其中一个比特位用于表征待上报的 CSI信息中的 CQI与此前上报 的 CSI信息中的 CQI是否相同, 另一个比特位用于表征待上报的 CSI信息中 的 PMI与此前上 4艮的 CSI信息中的 PMI是否相同;
所述信息上报单元具体用于:
当待上 4艮的 CSI信息中的 CQI和 PMI均与此前上 4艮的 CSI信息中的 CQI 和 PMI不相同时, 向所述基站上报待上报的 CSI信息中的 CQI和 PMI;
当待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信 息中的 CQI或 PMI不相同时, 向所述基站上报与此前上报的 CSI信息中不同 的待上报指示,或者将待上报的 CSI信息中的 CQI和 PMI均上报给所述基站。
26、 根据权利要求 18所述的用户设备, 其特征在于, 所述用户设备进一 步包括:
接收单元,用于在所述判断单元判断待上报的 CSI信息与所述信息上报单 元此前上报的 CSI信息是否相同之前, 接收所述基站发送的新模式指示信令, 所述新模式指示信令用于指示所述用户设备上报指示标识。
27、 一种基站, 其特征在于, 包括:
标识接收单元,用于在周期性上报信道状态信息 CSI的过程中,在上报子 帧上接收用户设备 UE上报的指示标识, 所述指示标识用于表征所述 UE待上 报的 CSI信息与所述 UE此前上报的 CSI信息是否相同, 其中, 所述指示标识 的比特位少于 CSI信息的比特位。
28、 根据权利要求 27所述的基站, 其特征在于, 所述基站进一步包括: 信息接收单元,用于当所述标识接收单元接收的所述指示标识表征所述待 上报的 CSI信息与所述此前上报的 CSI信息不相同时,接收所述 UE上报的所 述待上报的 CSI信息。
29、 根据权利要求 27所述的基站, 其特征在于, 所述信息接收单元具体 用于:
在下一个上报子帧上接收所述 UE上报的所述待上报的 CSI信息; 所述指示发送单元还用于向所述 UE发送非周期上 指示;
所述信息接收单元还具体用于接收所述 UE根据所述非周期上报指示上报 的所述待上报的 CSI信息。
30、 根据权利要求 29所述的基站, 其特征在于, 所述信息接收单元具体 包括:
第一接收子单元, 用于在与所述上报子帧相邻的下一个上报子帧上,接收 所述 UE上 ^艮的所述待上 4艮的 CSI信息;
第二接收子单元, 用于在下一个相邻的子带上报周期中, 与所述上报子帧 对应的下一个上报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所述 子带上报周期包含上报一次多个子带 CSI信息的多个上报子帧;
第三接收子单元, 用于在下一个相邻的宽带上报周期中, 与所述上报子帧 对应的下一个上报子帧上, 接收所述 UE上报的所述待上报的 CSI信息, 所述 宽带上报周期包含一个上报宽带 CSI信息的上报子帧以及多个子带上报周期 的上报子帧。
31、 根据权利要求 27至 30中任一项所述的基站, 其特征在于, 所述信息 接收单元接收的所述 CSI信息为下述任意一种指示或至少两种指示的组合: 信道质量指示 CQI、预编码矩阵指示 PMI、预编码类型指示 PTI和秩指示
RI。
32、 根据权利要求 31所述的基站, 其特征在于, 所述标识接收单元接收 的所述指示标识占用至少一个比特位; 所述标识接收单元接收的所述比特位为 0表示待上报的 CSI信息中的至少 一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 1表示 待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示 不相同;
所述标识接收单元接收的所述比特位为 1表示待上报的 CSI信息中的至少 一个指示与此前上报的 CSI信息中的至少一个指示相同,所述比特位为 0表示 待上报的 CSI信息中的至少一个指示与此前上报的 CSI信息中的至少一个指示 不相同。
33、 根据权利要求 32所述的基站, 其特征在于, 当所述 CSI信息为 CQI 和 PMI的组合时, 所述标识接收单元接收的指示标识占用 2个比特位, 其中 一个比特位用于表征待上报的 CSI信息中的 CQI与此前上报的 CSI信息中的 CQI是否相同, 另一个比特位用于表征待上报的 CSI信息中的 PMI与此前上 报的 CSI信息中的 PMI是否相同;
所述信息接收单元具体用于:
当待上 4艮的 CSI信息中的 CQI和 PMI均与此前上 4艮的 CSI信息中的 CQI 和 PMI不相同时, 接收所述 UE上报的待上报的 CSI信息中的 CQI和 PMI;
当待上报的 CSI信息中的 CQI和 PMI中有一项指示与此前上报的 CSI信 息中的 CQI或 PMI不相同时, 接收所述 UE上报的与此前上报的 CSI信息中 不同的待上报指示, 或者接收所述 UE上报的待上报的 CSI信息中的 CQI和 PML
34、 根据权利要求 27所述的基站, 其特征在于, 所述基站进一步包括: 模式切换指示单元,用于在所述标识接收单元在上报子帧接收所述 UE上 报的指示标识之前, 向所述 UE发送新模式指示信令, 所述新模式指示信令用 于指示所述 UE上报指示标识。
35、 一种信息上报的系统, 其特征在于, 包括: 用户设备 UE和基站, 其 中,
所述 UE, 用于在周期性上报信道状态信息 CSI的过程中, 判断待上报的 CSI信息与此前上报的 CSI信息是否相同, 以得到判断结果, 根据判断结果向 基站上报指示标识;
所述基站, 用于在上报子帧上接收所述 UE上报的指示标识, 所述指示标 识用于表征所述 UE待上报的 CSI信息与所述 UE此前上报的 CSI信息是否相 同;
其中, 所述指示标识的比特位少于 CSI信息的比特位。
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