CN105337689A - Channel quality feedback method, terminal and network element - Google Patents
Channel quality feedback method, terminal and network element Download PDFInfo
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- CN105337689A CN105337689A CN201410390011.5A CN201410390011A CN105337689A CN 105337689 A CN105337689 A CN 105337689A CN 201410390011 A CN201410390011 A CN 201410390011A CN 105337689 A CN105337689 A CN 105337689A
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Abstract
The embodiment of the invention provides a channel quality feedback method, a terminal and a network element. At a terminal side, the method comprises the following steps of: measuring channel quality of a downlink subframe based on a NAICS (Network Assistance Interference Cancellation and Suppression) technology, and obtaining CQI of the downlink subframe containing NAICS gain; feeding back the CQI of the downlink subframe to a network side except the CQI of a special subframe. At the network side, the method comprises the following steps of: receiving CQI of the downlink subframe transmitted by a terminal; according to a preset corresponding relation between the CQI and the NAICS gain, removing the NAICS corresponding to the CQI from the received CQI; and according to a value obtained after removing the NAICS corresponding to the CQI from the received CQI, determining MCS of DwPTS (Downlink Pilot Time Slot) in the special subframe. The method, the terminal and the network element solve the problem that two sets of feedback modes of CQI to the network side for the downlink subframe and the special subframe are unreasonable in the prior art. The invention relates to the technical field of mobile communication.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of channel quality feedback method, terminal and network element.
Background technology
In existing 3GPPR12, network assistance interference delete (NAICS, NetworkAssistanceInterferenceCancellationandSuppression) registration study.The principle of NAICS is: be terminal configuration advanced receivers, according to the interference message of the notice adjacent cell disturbed condition that network side sends, this terminal being configured with advanced receivers, in conjunction with self blind check, is effectively deleted the interference detected, is improved receptivity.Fig. 1 a ~ Fig. 1 b eliminates presence of intercell interference schematic diagram for utilizing NAICS technology.As shown in Figure 1a, community A and community B is neighbor cell, terminal a in the A of community is when receiving the downstream signal that community A sends, also the downstream signal that community B sends can be received, the downstream signal that so community B sends constitutes the interference signal of terminal a, and in like manner, the terminal b in the B of community is when receiving the downstream signal that community B sends, also can receive the downstream signal that community A sends, the downstream signal that so community A sends constitutes the interference signal of terminal b; As shown in Figure 1 b, be configured with terminal a and the terminal b of advanced receivers, the adjacent cell disturbed condition message that self community, place sends can be received respectively, and according to the disturbed condition message of network side notice and self blind check, detect and delete the interference that adjacent cell produces self.
But, current assessment shows the length meeting an at least needs guarantee subframe of NAICS blind check precision, and time division duplex (TDD, TimeDivisionDuplexing) special subframe of system is by descending pilot frequency time slot (DwPTS, DownlinkPilotTimeSlot), protection interval (CP, GuardPeriod), uplink pilot time slot (UpPTS, UplinkPilotTimeSlot) three parts are formed, this three part takies 14 symbols of a subframe jointly, obviously, the symbolic number that DwPTS takies is less than 14, namely less than the length of a subframe, the blind check accuracy of terminal to interference is caused to be guaranteed.
So, at terminal statistical channel quality instruction (CQI, ChannelQualityIndicator) time, for descending sub frame, owing to considering NAICS, delete interference signal, NAICS gain is included in the CQI of the descending sub frame of statistics, the CQI of descending sub frame is uprised, and for special subframe, the symbolic number taken due to DwPTS can not meet NAICS blind check precision, also just cannot consider that NAICS carries out interference delete, the CQI of the special subframe added up is caused not comprise NAICS gain, make the CQI of CQI lower than descending sub frame of special subframe, so, end side will count the CQI of two different stages: namely include the CQI of NAICS gain and do not comprise the CQI of NAICS, this is just for terminal feedback CQI brings problem.
For NAICS limited ability in TDD system special subframe, how terminal feeds back suitable CQI problem, and existing solution comprises following three kinds:
The first scheme: terminal respectively corresponding descending sub frame and special subframe directly feeds back two cover CQI.But this scheme network resource overhead is larger.
First scheme: the mean value of terminal feedback descending sub frame CQI rank and special subframe CQI rank.But, because descending sub frame CQI is superior to special subframe CQI rank, after so that the CQI of different stage is average, cause the average CQI level fed back lower than descending sub frame CQI rank, and higher than special subframe CQI rank, like this, the channel capacity of descending sub frame will be wasted, and the data demodulates error probability of special subframe also can increase.
The third scheme: terminal feedback, for the mean value of descending sub frame CQI rank, is then adjusted by independent a set of outer loop link self adaptation (OLLA, OuterLoopLinkAdaptation) for special subframe.But because the actual MCS of special subframe in the program and the CQI of feedback differs greatly, again because special subframe number itself is less, OLLA convergent cycle is long.
Summary of the invention
Embodiments provide a kind of channel quality feedback method, terminal and network element, overlap the feedback system irrational problem of different CQI to network side in order to solve in prior art for descending sub frame and special subframe two.
Based on the problems referred to above, one of a kind of channel quality feedback method that the embodiment of the present invention provides, is applied to end side, comprises:
The channel quality of auxiliary interference delete NAICS commercial measurement descending sub frame Network Based, obtains the channel quality indicator (CQI) of the descending sub frame comprising NAICS gain;
To the CQI of network side feeding back downlink subframe, and do not feed back the CQI of special subframe,
Wherein, the CQI of the descending sub frame of feedback is used for network side according to the corresponding relation between CQI and the NAICS gain preset, and removes the NAICS gain that this CQI is corresponding, obtain the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe from this CQI.
One of a kind of channel quality feedback method that the embodiment of the present invention provides, is applied to network side, comprises:
The channel quality indicator (CQI) of the descending sub frame that receiving terminal sends, wherein, described CQI comprises NAICS gain;
According to the corresponding relation between CQI and the NAICS gain preset, from the CQI received, remove the NAICS gain that this CQI is corresponding;
According to the value obtained after remove NAICS gain corresponding to this CQI from the CQI received, determine the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe.
A kind of channel quality feedback method two that the embodiment of the present invention provides, is applied to end side, comprises:
Limit according to the scheduling to special subframe that network side is preset, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in this adjacent descending sub frame;
Determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe determined carries out interference delete to this special subframe;
Based on the CQI of DwPTS in this special subframe, determine a set of CQI and feed back to network side.
A kind of channel quality feedback method two that the embodiment of the present invention provides, is applied to network side, comprises:
In advance for special subframe arranges scheduling restriction,
Wherein, described scheduling is restricted to when during needs are to special subframe, DwPTS dispatches, and makes DwPTS in special subframe continue to use the data transfer mode of described adjacent descending sub frame; When not needing that in special subframe, DwPTS dispatches, make DwPTS in special subframe idle.
One of terminal that the embodiment of the present invention provides, comprising:
Measurement module, for the channel quality of auxiliary interference delete NAICS commercial measurement descending sub frame Network Based, obtains the channel quality indicator (CQI) of the descending sub frame comprising NAICS gain;
Feedback module, for the CQI to network side feeding back downlink subframe, and does not feed back the CQI of special subframe,
Wherein, the CQI of the descending sub frame of feedback is used for network side according to the corresponding relation between CQI and the NAICS gain preset, and removes the NAICS gain that this CQI is corresponding, obtain the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe from this CQI.
One of network element that the embodiment of the present invention provides, comprising:
Receiver module, for the channel quality indicator (CQI) of the descending sub frame that receiving terminal sends, wherein, described CQI comprises NAICS gain;
Remove module, for according to the corresponding relation between CQI and the NAICS gain preset, from the CQI that described receiver module receives, remove the NAICS gain that this CQI is corresponding;
Determination module, for the value obtained according to described removal module, determines the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe.
The terminal two that the embodiment of the present invention provides, comprising:
Determination module, the scheduling to special subframe for presetting according to network side limits, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in this adjacent descending sub frame;
Interference delete module, for determining the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe that described determination module is determined carries out interference delete to this special subframe;
Feedback module, for the CQI based on DwPTS in this special subframe, determines a set of CQI and feeds back to network side.
The network element two that the embodiment of the present invention provides, comprising: presetting module;
Described presetting module, for limiting for special subframe arranges scheduling in advance,
Wherein, described scheduling is restricted to when during needs are to special subframe, DwPTS dispatches, and makes DwPTS in special subframe continue to use the data transfer mode of described adjacent descending sub frame; When not needing that in special subframe, DwPTS dispatches, make DwPTS in special subframe idle.
The beneficial effect of the embodiment of the present invention comprises:
A kind of channel quality feedback method, terminal and network element that the embodiment of the present invention provides, in end side, based on the channel quality of NAICS commercial measurement descending sub frame, obtain the CQI of the descending sub frame comprising NAICS gain; To the CQI of network side feeding back downlink subframe, and do not feed back the CQI of special subframe., at network side, the channel quality indicator (CQI) of the descending sub frame that receiving terminal sends; According to the corresponding relation between CQI and the NAICS gain preset, from the CQI received, remove the NAICS gain that this CQI is corresponding; According to the value obtained after remove NAICS gain corresponding to this CQI from the CQI received, determine the MCS of DwPTS in special subframe.Compared with prior art, only to the CQI of network side feeding back downlink subframe, feedback two need do not needed to overlap CQI, saves Internet resources; Network side is by pre-setting the corresponding relation between CQI and NAICS gain, NAICS gain corresponding to this CQI is removed from the CQI received, thus obtain the MCS of special subframe, the CQI of descending sub frame and special subframe can be obtained exactly, the CQI of feedback can not waste the ability of descending sub frame because of the actual CQI lower than descending sub frame, also can not increase the demodulation error rate of special subframe because of the actual CQI higher than special subframe; And the CQI of the special subframe obtained will be made inaccurate because of OLLA convergent cycle is long;
A kind of channel quality feedback method, terminal and network element that the embodiment of the present invention provides, limit according to the scheduling to special subframe that network side is preset, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in DwPTS in this special subframe in this adjacent descending sub frame; Determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, according to the interference existed in DwPTS in this special subframe determined, interference delete is carried out to this special subframe; Based on the CQI of DwPTS in this special subframe, determine a set of CQI and feed back to network side.Compared with prior art, only need feed back a set of CQI to network side, not need feedback two to overlap CQI, save Internet resources, network side limits the scheduling of special subframe by pre-setting, when special subframe continues to use the scheduling mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated in this adjacent descending sub frame is defined as the interference existed in this special subframe, and the CQI of special subframe is determined according to this interference, the CQI of descending sub frame and special subframe can be obtained exactly, the CQI of feedback can not waste the ability of descending sub frame because of the actual CQI lower than descending sub frame, also the demodulation error rate of special subframe can not be increased because of the actual CQI higher than special subframe, and the CQI of the special subframe obtained will be made inaccurate because of OLLA convergent cycle is long.
Accompanying drawing explanation
The NAICS technology that utilizes that Fig. 1 a ~ Fig. 1 b provides for background technology of the present invention eliminates presence of intercell interference schematic diagram;
One of a kind of channel quality feedback method that Fig. 2 provides for the embodiment of the present invention is applied to the flow chart of end side;
One of a kind of channel quality feedback method that Fig. 3 provides for the embodiment of the present invention is applied to the flow chart of network side;
The flow chart that Fig. 4 provides two of a kind of channel quality feedback method to be applied to end side for the embodiment of the present invention;
Fig. 5 provides a kind of flow chart of channel quality feedback method for the embodiment of the present invention 1;
Fig. 6 provides a kind of flow chart of channel quality feedback method for the embodiment of the present invention 2;
Corresponding relation schematic diagram between the signal to noise ratio that the base station that Fig. 7 provides for the embodiment of the present invention adopts certain a set of parameter value of parameter preset to add up for the advanced receivers of different performance and NAICS gain;
Fig. 8 provides a kind of flow chart of channel quality feedback method for the embodiment of the present invention 3;
Fig. 9 provides a kind of flow chart of channel quality feedback method for the embodiment of the present invention 4;
The structural representation of one of the terminal that Figure 10 provides for the embodiment of the present invention;
The structural representation of one of the network element that Figure 11 provides for the embodiment of the present invention;
The structural representation of the terminal two that Figure 12 provides for the embodiment of the present invention.
Embodiment
Embodiments provide a kind of channel quality feedback method, terminal and network element, below in conjunction with Figure of description, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.And when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
The embodiment of the present invention provides one of a kind of channel quality feedback method, is applied to end side, as shown in Figure 2, comprising:
S201, channel quality based on NAICS commercial measurement descending sub frame, obtain the CQI of the descending sub frame comprising NAICS gain.
S202, CQI to network side feeding back downlink subframe, and do not feed back the CQI of special subframe,
Wherein, the CQI of the descending sub frame of feedback is used for network side according to the corresponding relation between CQI and the NAICS gain preset, the NAICS gain that this CQI is corresponding is removed from this CQI, obtain the modulation coding mode (MCS, ModulationandCodingScheme) of DwPTS in special subframe.
Corresponding to method shown in above-mentioned Fig. 2, the embodiment of the present invention also provides one of a kind of channel quality feedback method, is applied to network side, as shown in Figure 3, comprising:
The CQI of the descending sub frame that S301, receiving terminal send,
Wherein, this CQI is the channel quality of terminal based on NAICS commercial measurement descending sub frame, the CQI comprising NAICS gain obtained.
Corresponding relation between CQI and the NAICS gain that S302, basis are preset, removes the NAICS gain that this CQI is corresponding from S301 in the CQI received.
S303, according to obtain in S302 from CQI, remove NAICS gain corresponding to this CQI after the value that obtains, determine the MCS of DwPTS in special subframe.
A kind of channel quality feedback method two that the embodiment of the present invention provides, is applied to end side, as shown in Figure 4, comprises:
S401, the scheduling to special subframe preset according to network side limit, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in DwPTS in this special subframe in this adjacent descending sub frame.
S402, determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, according to the interference existed in DwPTS in this special subframe determined in S401, interference delete is carried out to this special subframe.
S403, CQI based on DwPTS in this special subframe, determine a set of CQI and feed back to network side.
Advanced receivers can be configured with in terminal in one of a kind of channel quality feedback method that the embodiment of the present invention provides and two of a kind of channel quality feedback method.One of a kind of channel quality feedback method adopting the embodiment of the present invention to provide or a kind of channel quality feedback method two, a set of CQI can be fed back to network side, save Internet resources, and the CQI of special subframe can be determined exactly, make the feedback system of channel quality more reasonable.
Below in conjunction with accompanying drawing, with specific embodiment, method provided by the invention and relevant device are described in detail.
Embodiment 1:
In the embodiment of the present invention 1, one of a kind of channel quality feedback method, is applied to end side, as shown in Figure 5, specifically comprises the steps:
S501, channel quality based on NAICS commercial measurement descending sub frame, obtain the CQI of the descending sub frame comprising NAICS gain.
Further, in this step, can measure based on the CQI of NAICS technology to descending sub frame.
Further, in the embodiment of the present invention, terminal can be configured with advanced receivers.Advanced receivers comprises linear enhancing least mean-square error-interference rejection and merges (E-LMMSE-IRC), nonlinear symbol rank interference delete (SLIC, Symbol-levelInterferenceCancellation), maximal possibility estimation (ML, or low complex degree maximal possibility estimation (R-ML MaximumLikelihood), ReducedcomplexityMaximumLikelihood,) and codeword level interference delete (CWIC, CodewordlevelInterferenceCancellation) etc.Wherein, E-LMMSE-IRC utilizes the interfered cell pilot frequency configuration and pre-coding matrix that obtain from network side high level, estimates interference channel, and then carries out AF panel merging, promote receptivity; Non-linear receiver utilizes interference-related information, estimates and reconstructs interference signal, being deleted in Received signal strength, promotes receptivity.
Further, before this step of execution, terminal needs the disturbed condition of reception network side notice and obtains interference parameter according to self blind check, the interference parameter of the network side notice that terminal receives, and terminal can comprise parameter preset as shown in Table 1 by the interference parameter that self blind check obtains, these parameter presets are used for enabling terminal effectively carry out interference delete:
Table one
S502, to determine in S502 the weighted value of measured descending sub frame CQI to obtain weighting CQI.
In this step, can be according to actual needs, weights are set, the CQI of the descending sub frame each to be feedback measured is weighted, such as: the mean value that each descending sub frame CQI can be got, also some descending sub frame CQI weights can be set to zero, get part descending sub frame CQI weighted value, concrete enforcement can according to actual needs, not limit here.
S503, the weighting CQI determined in network side feedback S502,
Wherein, weighting CQI is used for network side according to the corresponding relation between CQI and the NAICS gain preset, and removes the NAICS gain that this weighting CQI is corresponding, obtain the MCS of DwPTS in special subframe from weighting CQI.
Further, in the present embodiment, end side can be measured the CQI of special subframe, also can not measure, but no matter whether end side measures the CQI of special subframe, in order to save system resource, only feeding back the weighting CQI for descending sub frame to network side, and not feeding back the CQI of special subframe.
Further, because special subframe does not consider NAICS, the CQI that terminal is calculated in special subframe does not comprise NAICS gain, and normal descending sub frame considers NAICS when calculating CQI, that is, calculate descending sub frame Signal to Interference plus Noise Ratio (SINR, SignaltoInterferenceandNoiseRatio) time, because the interference signal as denominator has carried out interference delete, Signal to Interference plus Noise Ratio is made to become large, so CQI is higher, this will cause the CQI of corresponding two different stages of CQI difference of the CQI of special subframe and descending sub frame.Can determine for different advanced receivers, between the NAICS gain that the CQI that often kind of advanced receivers measurement obtains and this CQI comprises, there is corresponding relation, so, corresponding relation between the NAICS gain comprised in the CQI that the advanced receivers measurement that network side can count different performance in advance obtains and this CQI, so, network side can for advanced receivers corresponding to terminal, determine the corresponding relation between the NAICS gain that comprises in the weighting CQI that receives and this weighting CQI, NAICS gain corresponding to this weighting CQI is removed again from weighting CQI, obtain the MCS of special subframe.
Further, the corresponding relation between CQI and the NAICS gain preset is that network side passes through controls NAICS switch, and respectively according to during NAICS switch opens and when NAICS switch is cut out, the CQI of the descending sub frame of terminal feedback adds up; Or the corresponding relation between CQI and the NAICS gain preset is the mode by emulating under line, different values for parameter preset carry out receptivity measurement to the advanced receivers of different performance, and add up according to the measurement result obtained, wherein, receptivity can be throughput, Block Error Rate (BLER, BlockErrorRatio) etc.
Further, network side determines the MCS of descending sub frame according to the weighting CQI of descending sub frame, and after determining the MCS of special subframe according to the weighting CQI of descending sub frame, the MCS to determining also is needed constantly to adjust, increase according to the disposition of present sub-frame to transmission data or reduce MCS, determining that the MCS for descending sub frame or special subframe all can send to terminal at every turn.
Embodiment 2:
With the embodiment of the present invention 1 correspondingly, the embodiment of the present invention 2 provides one of a kind of channel quality feedback method, is applied to network side, as shown in Figure 6, specifically comprises the steps:
S601, add up corresponding relation between CQI and NAICS gain in advance.
This step is the corresponding relation that network side counts between CQI and NAICS gain in advance, and be kept at base station side, need can obtain when using when performing the present embodiment (as step S602), therefore, when performing the present embodiment, the step of adding up in advance does not need all to perform at every turn.
Further, the corresponding relation between the NAICS gain comprised in CQI and this CQI can be the direct corresponding relation of numerical value, also can be functional relation etc.
Further, further, network side can adopt various ways to add up the corresponding relation between CQI corresponding to the often kind of advanced receivers NAICS gain corresponding with this CQI in advance for the advanced receivers of different performance.Particularly, the corresponding relation between CQI and NAICS gain can be added up in the following way:
First kind of way: by control NAICS switch, respectively according to during NAICS switch opens and when NAICS switch is cut out, the CQI of the descending sub frame of terminal feedback adds up.
In first kind of way, can control NAICS switch, NAICS switch cuts out and does not namely use NAICS, the CQI of the descending sub frame of terminal feedback is added up, again NAICS switch opens is namely used NAICS, the CQI of the descending sub frame of terminal feedback is added up, thus obtains the corresponding relation between the CQI NAICS gain corresponding with this CQI, and preserve at network side.
The second way: by the mode emulated under line, the different values for parameter preset carry out receptivity measurement to the advanced receivers of different performance, and add up according to the measurement result obtained.
In the second way, under the different values of parameter preset, advanced receivers for different performance carries out receptivity measurement, and add up according to the measurement result obtained, receptivity can be throughput, Block Error Rate etc., and parameter preset can comprise: transmission mode, modulation system, interference power etc.
During concrete enforcement, the corresponding relation of signal to noise ratio (SNR, SignaltoNoiseRatio) and receptivity can be counted, such as: the corresponding relation of SNR and throughput, or the corresponding relation etc. of SNR and error performance.Thus obtain the corresponding relation between CQI and NAICS gain by the corresponding relation of SNR and receptivity.
Adopt the different parameters value of parameter preset can obtain the different described corresponding relations added up for each advanced receivers, Fig. 7 is that base station adopts certain a set of parameter value of parameter preset (such as: transmission mode: transmission mode four, modulation system: quarternary phase-shift keying (QPSK) (QPSK, QuadraturePhaseShiftKeying), the level of interference of the strongest two interfered cells: [13.913.34] dB) corresponding relation schematic diagram between the SNR that adds up for the advanced receivers of different performance and throughput, wherein, the longitudinal axis characterizes throughput, transverse axis characterizes signal to noise ratio, curve in figure characterizes the performance of corresponding advanced receivers from left to right by good extremely poor, the receiver that rightmost curve characterizes can regard traditional receivers as.
When receiving the CQI of the descending sub frame that terminal sends, the preset parameter value corresponding according to terminal, determine the described corresponding relation schematic diagram that terminal is corresponding, suppose to determine that Fig. 7 is described corresponding relation schematic diagram corresponding to terminal, as shown in Figure 7, can with the preset value of the longitudinal axis (such as 0.5) for benchmark, for the curve (corresponding with special subframe) that the curve (corresponding with descending sub frame) that the advanced receivers of terminal use is corresponding is corresponding with traditional receivers, the two is made all to get preset value at the longitudinal axis, the two difference of respective value on transverse axis is defined as the NAICS gain comprised in this user equipment downlink subframe CQI, or, can take transverse axis as benchmark, CQI according to the descending sub frame received determines the Signal to Interference plus Noise Ratio (SINR that this CQI is corresponding,), parameter preset interference power corresponding according to Fig. 7 again obtains corresponding SNR, for the curve that the curve that the advanced receivers of terminal use is corresponding is corresponding with traditional receivers, make the SNR that the two all obtains at transverse axis, the two difference of respective value on the longitudinal axis is defined as the NAICS gain comprised in this user equipment downlink subframe CQI, from descending sub frame CQI, removes the CQI that this NAICS gain can obtain special subframe.
Further, the second way can carry out emulating and simulation result being sent to network side in end side, also can emulate at network side.
The CQI of the descending sub frame that S602, receiving terminal send, wherein, this CQI comprises NAICS gain.
Further, in this step, the CQI received can for terminal be based on the channel quality of NAICS commercial measurement descending sub frame, the CQI comprising NAICS gain obtained.
Further, in the present embodiment, network side can be the network element device for processing terminal subframe CQI value of network side, such as: base station.
S603, according in S601 preset CQI and NAICS gain between corresponding relation, remove the NAICS gain that this CQI is corresponding in the CQI received from S602.
S604, according to obtain in S603 from CQI, remove NAICS gain corresponding to this CQI after the value that obtains, determine the MCS of DwPTS in special subframe.
Further, the simplified process that subframe (referring to descending sub frame or special subframe herein) CQI estimates can comprise: network side sends public reference signal on default Resource Unit (RE), terminal detects the quality of these public reference signals, and extrapolate the wide upper signal channel quality (such as SINR) of each subband, then the wide optimum MCS that can support of each subband is extrapolated, and adopting preset format to report base station (CQIreport), network side makes corresponding Resourse Distribute according to the CQI reported.CQI has 16 ranks, and MCS has 32 ranks, that is, the CQI of the subframe that terminal is fed back to network side can reflect the MCS that this subframe is corresponding to a certain extent, and the MCS of this subframe can not be reflected very exactly, also need network side according to the CQI of subframe, adopt MCS adjustment mode of presetting, the MCS of subframe is adjusted further, until obtain MCS accurately.
Further, presetting MCS adjustment mode can be OLLA mode, particularly, after terminal receives the packet of network side transmission, can according to receiving the result of data to network side feedback information, that is, if terminal correctly receives the data that network side sends, then to network side feeding back ACK, if terminal fails correctly to receive the data that network side sends, then to network side feedback NACK, network side, according to the ACK/NACK received, adjusts the MCS form used.Such as: if network side receives the ACK that terminal sends, then think that channel also has surplus energy, can MCS be strengthened; If network side receive terminal send receive NACK, then think and the ability having exceeded present channel can reduce MCS.Finally obtain the MCS mated most with data channel.
Embodiment 3:
In conjunction with the embodiment of the present invention 1, embodiment 2, the embodiment of the present invention 3 provides one of a kind of channel quality feedback method, is applied to network side (for base station) and end side, as shown in Figure 8, specifically comprises the steps:
S801, terminal, based on the channel quality of NAICS commercial measurement descending sub frame, obtain the CQI of the descending sub frame comprising NAICS gain.
S802, terminal determine the weighted value of measured descending sub frame CQI in S801, obtain weighting CQI.
The weighting CQI that S803, terminal are determined in base station feedback S802.
After the CQI of the descending sub frame that S804, base station receiving terminal send, according to the corresponding relation between CQI and the NAICS gain preset, in the CQI received from S803, remove the NAICS gain that this CQI is corresponding.
S805, base station according to obtain in S804 from CQI, remove NAICS gain corresponding to this CQI after the value that obtains, determine the MCS of DwPTS in special subframe.
Embodiment 4:
In the embodiment of the present invention 4, a kind of channel quality feedback method two, is applied to end side, as shown in Figure 9, specifically comprises the steps:
S901, the scheduling to special subframe preset according to network side limit, and judge that whether special subframe is idle, if not, then enter step S902, if so, then enter step S904.
Further, network side (such as base station) can in advance for special subframe arranges scheduling restriction, scheduling is restricted to as when during needs are to special subframe, DwPTS dispatches, and makes DwPTS in special subframe continue to use the data transfer mode of described adjacent descending sub frame; When not needing that in special subframe, DwPTS dispatches, make DwPTS in special subframe idle.
That is, scheduling can be carried out to the DwPTS symbol of the special subframe adjoined with descending sub frame to limit, dispatch at the end of adjacent descending sub frame and do not complete (such as: call does not terminate), the DwPTS symbol in the special subframe after adjacent descending sub frame and this adjacent descending sub frame can be made to use identical data transfer mode (such as: proceed to converse), otherwise, make the DwPTS symbol of special subframe idle, and separately special subframe is not dispatched.
S902, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in this special subframe DwPTS in this adjacent descending sub frame.
Further, in different time slot proportion modes, after special subframe is close to descending sub frame usually in sequential, so the data transfer mode of special subframe can be restricted to descending sub frame adjacent with this identical, so just can continue to use the CQI metering system of this adjacent descending sub frame, being defined as the interference existed in this special subframe by the interference estimated in this adjacent descending sub frame, when determining the CQI of special subframe, this interference being removed.
Further, in this step, can before CQI measurement be carried out to this special subframe, based on NAICS technology, CQI measurement is carried out to this adjacent descending sub frame, carrying out in CQI process to this adjacent descending sub frame, the interference to this adjacent descending sub frame can be obtained, this interference can be defined as the interference existed in special subframe.
S903, determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, according to the interference existed in DwPTS in this special subframe determined in S902, interference delete is carried out to this special subframe.Enter step S909.
S904, when special subframe is idle, determine the interference power of DwPTS in special subframe.
S905, judge whether the interference power determined in S904 is greater than power threshold, if so, then enters step S906, if not, then enters step S908.
Further, in this step, power threshold can be determined in the following way:
Obtain the Reference Signal Received Power (RSRP, ReferenceSignalReceivingPower) of interfered cell; And according to the RSRP of power offset and acquisition, determine power threshold.Wherein, power offset is the value preset.
Further, at the RSRP according to power offset and acquisition, determine power threshold, directly can carry out power excursion process to RSRP, the value after process is defined as power threshold; It is also conceivable to power and strengthen mechanism, when needs consider that power strengthens mechanism, the RSRP according to power offset and acquisition determines that power threshold may be embodied as following steps:
Step one, judge network side whether enable power strengthen mechanism (Powerboosting).If enable, then enter step 2, if not enabled, then enter step 3.
Further, due to the mean value that RSRP is the signal power that reference signal receives, and the transmitted power of the power ratio data-signal of reference signal is strong usually, namely Powerboosting represents the value (as 3dB or 6dB) that reference signal power is stronger than data power.
Further, in this step, end side judges whether network side is enabled in the interference message of the notice adjacent cell disturbed condition that Powerboosting can be sent based on the network side received before NAICS commercial measurement CQI by end side and obtains.
If step 2 network side enables power strengthen mechanism, then from the RSRP obtained, remove the power of enhancing, and will power offset be used to be defined as power threshold to eliminating the value obtained after the superpower RSRP of increasing carries out migration processing.
In this step, first RSRP can be removed and strengthen power, carry out migration processing in use power offset to eliminating the superpower RSRP of increasing, obtaining power threshold.
In this step, the power usually strengthened can be 3dB or 6dB, and use the value of RSRP to deduct the power of this enhancing, the difference obtained can be defined as power threshold.
If step 3 network side not enabled power strengthens mechanism, then the value obtained after use power offset being carried out migration processing to RSRP is defined as power threshold.
S906, when the interference power determined is greater than power threshold, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in S902 in this adjacent descending sub frame determined.
S907, determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe determined in S906 carries out interference delete to this special subframe.Enter step S909.
S908, when the interference power determined is not more than power threshold, determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, interference delete is not carried out to this special subframe.
The weighted value of the descending sub frame CQI of S909, the CQI determining DwPTS in this special subframe and measurement, obtains weighting CQI.
In this step, when DwPTS has carried out the data transfer mode identical with adjacent descending sub frame in special subframe, owing to having continued to use the interference value in descending sub frame, the CQI of the special subframe obtained is substantially identical with the CQI of descending sub frame, can weights size be set according to actual needs, the CQI of the descending sub frame measured and special subframe is weighted, obtains weighting CQI.
S910, the weighting CQI determined in network side feedback S909.
Further, after network side can determine the MCS of descending sub frame and the MCS of special subframe according to weighting CQI, the MCS to determining also is needed constantly to adjust, increase according to the disposition of present sub-frame to transmission data or reduce MCS, determining that the MCS for descending sub frame or special subframe all can send to terminal at every turn.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of terminal and network element, the principle of dealing with problems due to these terminals and network element is similar to aforementioned a kind of channel quality feedback method, therefore the enforcement of this terminal and network element see the enforcement of preceding method, can repeat part and repeats no more.
A kind of terminal that the embodiment of the present invention provides, as shown in Figure 10, comprising:
Measurement module 1001, for the channel quality of auxiliary interference delete NAICS commercial measurement descending sub frame Network Based, obtains the channel quality indicator (CQI) of the descending sub frame comprising NAICS gain;
Feedback module 1002, for the CQI to network side feeding back downlink subframe, and does not feed back the CQI of special subframe,
Wherein, the CQI of the descending sub frame of feedback is used for network side according to the corresponding relation between CQI and the NAICS gain preset, and removes the NAICS gain that this CQI is corresponding, obtain the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe from this CQI.
Further, described terminal, also comprises: determination module 1003;
Described determination module 1003, for CQI from described feedback module 1002 to network side feeding back downlink subframe before, determine the weighted value of descending sub frame CQI measured by described measurement module, obtain weighting CQI;
Described feedback module 1002, specifically for feeding back the weighting CQI that described determination module 1003 is determined to network side.
A kind of network element that the embodiment of the present invention provides, as shown in figure 11, comprising:
Receiver module 1101, for the channel quality indicator (CQI) of the descending sub frame that receiving terminal sends, wherein, described CQI comprises NAICS gain;
Remove module 1102, for according to the corresponding relation between CQI and the NAICS gain preset, from the CQI that described receiver module 1101 receives, remove NAICS gain corresponding to this CQI;
Determination module 1103, for the value obtained according to described removal module, determines the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe.
Further, described network element, also comprises: statistical module 1104;
Described statistical module 1104, for adding up the corresponding relation between CQI and NAICS gain in the following way: by control NAICS switch, respectively according to during NAICS switch opens and when NAICS switch is cut out, the CQI of the descending sub frame of described terminal feedback adds up; Or by the mode emulated under line, the different values for parameter preset carry out receptivity measurement to the advanced receivers of different performance, and add up according to the measurement result obtained.
A kind of terminal that the embodiment of the present invention provides, as shown in figure 12, comprising:
Determination module 1201, the scheduling to special subframe for presetting according to network side limits, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in this adjacent descending sub frame;
Interference delete module 1202, for determining the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe that described determination module 1201 is determined carries out interference delete to this special subframe;
Feedback module 1203, for the CQI based on DwPTS in this special subframe, determines a set of CQI and feeds back to network side.
Further, described feedback module 1203, specifically for the weighted value of the descending sub frame CQI of the CQI and measurement that determine DwPTS in this special subframe, obtains weighting CQI; The weighting CQI determined is fed back to network side.
Further, described determination module 1201, the scheduling to special subframe also for presetting according to network side limits, and when special subframe is idle, determines the interference power of DwPTS in special subframe;
Described interference delete module 1202, also for when the interference power that described determination module 1201 is determined is not more than power threshold, determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, interference delete is not carried out to this special subframe; When the interference power that described determination module 1201 is determined is greater than power threshold, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in this adjacent descending sub frame; Determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe determined carries out interference delete to this special subframe.
Further, described determination module 1201, also for determining power threshold in the following way: the Reference Signal Received Power RSRP obtaining interfered cell; According to the RSRP of power offset and acquisition, determine described power threshold.
Further, described determination module 1201, specifically for judging whether network side is enabled power and strengthened mechanism; If network side enables power strengthen mechanism, then from the RSRP obtained, remove the power of enhancing, and will described power offset be used to be defined as described power threshold to eliminating the value obtained after the superpower RSRP of increasing carries out migration processing; If network side not enabled power strengthens mechanism, then the value obtained after the described power offset of use being carried out migration processing to RSRP is defined as described power threshold.
A kind of network element that the embodiment of the present invention provides, comprising: presetting module;
Described presetting module, for limiting for special subframe arranges scheduling in advance, wherein, described scheduling is restricted to when during needs are to special subframe, DwPTS dispatches, and makes DwPTS in special subframe continue to use the data transfer mode of described adjacent descending sub frame; When not needing that in special subframe, DwPTS dispatches, make DwPTS in special subframe idle.
The function of above-mentioned each unit may correspond to the respective handling step in flow process shown in Fig. 2 to Fig. 6, Fig. 8 to Fig. 9, does not repeat them here.
A kind of channel quality feedback method, terminal and network element that the embodiment of the present invention provides, in end side, based on the channel quality of NAICS commercial measurement descending sub frame, obtain the CQI of the descending sub frame comprising NAICS gain; To the CQI of network side feeding back downlink subframe, and do not feed back the CQI of special subframe., at network side, the channel quality indicator (CQI) of the descending sub frame that receiving terminal sends; According to the corresponding relation between CQI and the NAICS gain preset, from the CQI received, remove the NAICS gain that this CQI is corresponding; According to the value obtained after remove NAICS gain corresponding to this CQI from the CQI received, determine the MCS of DwPTS in special subframe.Compared with prior art, only to the CQI of network side feeding back downlink subframe, feedback two need do not needed to overlap CQI, saves Internet resources; Network side is by pre-setting the corresponding relation between CQI and NAICS gain, NAICS gain corresponding to this CQI is removed from the CQI received, thus obtain the MCS of special subframe, the CQI of descending sub frame and special subframe can be obtained exactly, the CQI of feedback can not waste the ability of descending sub frame because of the actual CQI lower than descending sub frame, also can not increase the demodulation error rate of special subframe because of the actual CQI higher than special subframe; And the CQI of the special subframe obtained will be made inaccurate because of OLLA convergent cycle is long;
A kind of channel quality feedback method, terminal and network element that the embodiment of the present invention provides, limit according to the scheduling to special subframe that network side is preset, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in DwPTS in this special subframe in this adjacent descending sub frame; Determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, according to the interference existed in DwPTS in this special subframe determined, interference delete is carried out to this special subframe; Based on the CQI of DwPTS in this special subframe, determine a set of CQI and feed back to network side.Compared with prior art, only need feed back a set of CQI to network side, not need feedback two to overlap CQI, save Internet resources, network side limits the scheduling of special subframe by pre-setting, when special subframe continues to use the scheduling mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated in this adjacent descending sub frame is defined as the interference existed in this special subframe, and the CQI of special subframe is determined according to this interference, the CQI of descending sub frame and special subframe can be obtained exactly, the CQI of feedback can not waste the ability of descending sub frame because of the actual CQI lower than descending sub frame, also the demodulation error rate of special subframe can not be increased because of the actual CQI higher than special subframe, and the CQI of the special subframe obtained will be made inaccurate because of OLLA convergent cycle is long.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (23)
1. a channel quality feedback method, is characterized in that, comprising:
The channel quality of auxiliary interference delete NAICS commercial measurement descending sub frame Network Based, obtains the channel quality indicator (CQI) of the descending sub frame comprising NAICS gain;
To the CQI of network side feeding back downlink subframe, and do not feed back the CQI of special subframe,
Wherein, the CQI of the descending sub frame of feedback is used for network side according to the corresponding relation between CQI and the NAICS gain preset, and removes the NAICS gain that this CQI is corresponding, obtain the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe from this CQI.
2. the method for claim 1, is characterized in that, before the CQI to network side feeding back downlink subframe, also comprises:
Determine the weighted value of measured descending sub frame CQI, obtain weighting CQI;
To the CQI of network side feeding back downlink subframe, specifically comprise:
The weighting CQI determined is fed back to network side.
3. method as claimed in claim 1 or 2, it is characterized in that, corresponding relation between CQI and the NAICS gain preset is that network side passes through controls NAICS switch, and respectively according to during NAICS switch opens and when NAICS switch is cut out, the CQI of the descending sub frame of described terminal feedback adds up; Or
Corresponding relation between CQI and the NAICS gain preset is the mode by emulating under line, and the different values for parameter preset carry out receptivity measurement to the advanced receivers of different performance, and add up according to the measurement result obtained.
4. a channel quality feedback method, is characterized in that, comprising:
The channel quality indicator (CQI) of the descending sub frame that receiving terminal sends, wherein, described CQI comprises network assistance interference delete NAICS gain;
According to the corresponding relation between CQI and the NAICS gain preset, from the CQI received, remove the NAICS gain that this CQI is corresponding;
According to the value obtained after remove NAICS gain corresponding to this CQI from the CQI received, determine the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe.
5. method as claimed in claim 4, is characterized in that, adds up the corresponding relation between CQI and NAICS gain in the following way:
By control NAICS switch, respectively according to during NAICS switch opens and when NAICS switch is cut out, the CQI of the descending sub frame of described terminal feedback adds up; Or
By the mode emulated under line, the different values for parameter preset carry out receptivity measurement to the advanced receivers of different performance, and add up according to the measurement result obtained.
6. the method as described in any one of claim 4 or 5, is characterized in that, the described CQI received is the channel quality of described terminal based on NAICS commercial measurement descending sub frame, the CQI comprising NAICS gain obtained.
7. a channel quality feedback method, is characterized in that, comprising:
Limit according to the scheduling to special subframe that network side is preset, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in this adjacent descending sub frame;
Determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe determined carries out interference delete to this special subframe;
Based on the CQI of DwPTS in this special subframe, determine a set of CQI and feed back to network side.
8. method as claimed in claim 7, is characterized in that, based on the CQI of DwPTS in this special subframe, determines a set of CQI and to network side feedback, specifically comprises:
Determine the weighted value of the CQI of DwPTS in this special subframe and the descending sub frame CQI of measurement, obtain weighting CQI;
The weighting CQI determined is fed back to network side.
9. method as claimed in claim 7 or 8, it is characterized in that, the described scheduling to special subframe is restricted to when during needs are to special subframe, DwPTS dispatches, and makes DwPTS in special subframe continue to use the data transfer mode of described adjacent descending sub frame;
When not needing that in special subframe, DwPTS dispatches, make DwPTS in special subframe idle.
10. method as claimed in claim 9, is characterized in that, when special subframe is idle, also comprises:
Determine the interference power of DwPTS in special subframe;
When the interference power determined is not more than power threshold, determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, interference delete is not carried out to this special subframe;
When the interference power determined is greater than power threshold, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in this adjacent descending sub frame; Determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe determined carries out interference delete to this special subframe.
11. methods as claimed in claim 10, is characterized in that, determine power threshold in the following way:
Obtain the Reference Signal Received Power RSRP of interfered cell;
According to the RSRP of power offset and acquisition, determine described power threshold.
12. methods as claimed in claim 11, is characterized in that, according to the RSRP of power offset and acquisition, determine described power threshold, specifically comprise:
Judge whether network side is enabled power and strengthened mechanism;
If network side enables power strengthen mechanism, then from the RSRP obtained, remove the power of enhancing, and will described power offset be used to be defined as described power threshold to eliminating the value obtained after the superpower RSRP of increasing carries out migration processing;
If network side not enabled power strengthens mechanism, then the value obtained after the described power offset of use being carried out migration processing to RSRP is defined as described power threshold.
13. 1 kinds of channel quality feedback methods, is characterized in that, comprising:
In advance for special subframe arranges scheduling restriction,
Wherein, described scheduling is restricted to when during needs are to special subframe, DwPTS dispatches, and makes DwPTS in special subframe continue to use the data transfer mode of described adjacent descending sub frame; When not needing that in special subframe, DwPTS dispatches, make DwPTS in special subframe idle.
14. 1 kinds of terminals, is characterized in that, comprising:
Measurement module, for the channel quality of auxiliary interference delete NAICS commercial measurement descending sub frame Network Based, obtains the channel quality indicator (CQI) of the descending sub frame comprising NAICS gain;
Feedback module, for the CQI to network side feeding back downlink subframe, and does not feed back the CQI of special subframe,
Wherein, the CQI of the descending sub frame of feedback is used for network side according to the corresponding relation between CQI and the NAICS gain preset, and removes the NAICS gain that this CQI is corresponding, obtain the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe from this CQI.
15. terminals as claimed in claim 14, is characterized in that, also comprise: determination module;
Described determination module, for CQI from described feedback module to network side feeding back downlink subframe before, determine the weighted value of descending sub frame CQI measured by described measurement module, obtain weighting CQI;
Described feedback module, specifically for feeding back the weighting CQI that described determination module is determined to network side.
16. 1 kinds of network elements, is characterized in that, comprising:
Receiver module, for the channel quality indicator (CQI) of the descending sub frame that receiving terminal sends, wherein, described CQI comprises NAICS gain;
Remove module, for according to the corresponding relation between CQI and the NAICS gain preset, from the CQI that described receiver module receives, remove the NAICS gain that this CQI is corresponding;
Determination module, for the value obtained according to described removal module, determines the modulation coding mode MCS of descending pilot frequency time slot DwPTS in special subframe.
17. network elements as claimed in claim 16, is characterized in that, also comprise: statistical module;
Described statistical module, for adding up the corresponding relation between CQI and NAICS gain in the following way: by control NAICS switch, respectively according to during NAICS switch opens and when NAICS switch is cut out, the CQI of the descending sub frame of described terminal feedback adds up; Or by the mode emulated under line, the different values for parameter preset carry out receptivity measurement to the advanced receivers of different performance, and add up according to the measurement result obtained.
18. 1 kinds of terminals, is characterized in that, comprising:
Determination module, the scheduling to special subframe for presetting according to network side limits, when special subframe continues to use the data transfer mode of the adjacent descending sub frame of sequential before this special subframe, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in this adjacent descending sub frame;
Interference delete module, for determining the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe that described determination module is determined carries out interference delete to this special subframe;
Feedback module, for the CQI based on DwPTS in this special subframe, determines a set of CQI and feeds back to network side.
19. terminals as claimed in claim 18, is characterized in that, described feedback module, specifically for the weighted value of the descending sub frame CQI of the CQI and measurement that determine DwPTS in this special subframe, obtain weighting CQI; The weighting CQI determined is fed back to network side.
20. terminals as claimed in claim 19, is characterized in that, described determination module, the scheduling to special subframe also for presetting according to network side limits, and when special subframe is idle, determine the interference power of DwPTS in special subframe;
Described interference delete module, also for when the interference power that described determination module is determined is not more than power threshold, determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, interference delete is not carried out to this special subframe; When the interference power that described determination module is determined is greater than power threshold, the interference estimated is defined as the interference existed in descending pilot frequency time slot DwPTS in this special subframe in this adjacent descending sub frame; Determine the CQI of DwPTS in this special subframe, and in the process of CQI determining DwPTS in this special subframe, the interference according to existing in DwPTS in this special subframe determined carries out interference delete to this special subframe.
21. terminals as claimed in claim 20, is characterized in that, described determination module, also for determining power threshold in the following way: the Reference Signal Received Power RSRP obtaining interfered cell; According to the RSRP of power offset and acquisition, determine described power threshold.
22. terminals as claimed in claim 21, is characterized in that, described determination module, specifically for judging whether network side is enabled power and strengthened mechanism; If network side enables power strengthen mechanism, then from the RSRP obtained, remove the power of enhancing, and will described power offset be used to be defined as described power threshold to eliminating the value obtained after the superpower RSRP of increasing carries out migration processing; If network side not enabled power strengthens mechanism, then the value obtained after the described power offset of use being carried out migration processing to RSRP is defined as described power threshold.
23. 1 kinds of network elements, is characterized in that, comprising: presetting module;
Described presetting module, for limiting for special subframe arranges scheduling in advance,
Wherein, described scheduling is restricted to when during needs are to special subframe, DwPTS dispatches, and makes DwPTS in special subframe continue to use the data transfer mode of described adjacent descending sub frame; When not needing that in special subframe, DwPTS dispatches, make DwPTS in special subframe idle.
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| CN113923687A (en) * | 2020-07-10 | 2022-01-11 | 大唐移动通信设备有限公司 | Modulation and coding strategy MCS value adjusting method and device |
| CN113923687B (en) * | 2020-07-10 | 2023-08-22 | 大唐移动通信设备有限公司 | Modulation and coding strategy MCS value adjustment method and device |
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