CN106559167B

CN106559167B - A kind of method and device of link circuit self-adapting

Info

Publication number: CN106559167B
Application number: CN201510623918.6A
Authority: CN
Inventors: 朱莉; 鲍坤超; 严朝译; 胥恒
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-09-25
Filing date: 2015-09-25
Publication date: 2019-09-27
Anticipated expiration: 2035-09-25
Also published as: CN106559167A; WO2017050213A1

Abstract

The invention discloses a kind of method and devices of link circuit self-adapting, are related to field of communication technology, invent to solve the problems, such as the CQI inaccuracy existing in the prior art reported.Wherein, this method comprises: receiving the terminal capacity report message that user equipment is sent；The transmission mode statistical result of the terminal capability being had according to user equipment and the user equipment in the current statistic period, channel quality indicator (CQI) is sent to user equipment and reports instruction message, which reports instruction message to be used to indicate the user equipment and report CQI using mode corresponding with the terminal capability and the statistical result；MCS, which is carried out, according to the CQI of user equipment to report and user equipment current transmission mode selects rank.Present invention is mainly applied to during link circuit self-adapting.

Description

A kind of method and device of link circuit self-adapting

Technical field

The present invention relates to field of communication technology more particularly to a kind of method and devices of link circuit self-adapting.

Background technique

In cell mobile communication systems, link adaptation techniques are generallyd use to estimate the performance of wireless channel.Link Adaptive technique refers to that system according to the channel information currently obtained, is adaptively adjusted the behavior of system configured transmission, with gram Clothes adapt to present channel variation bring influence.In general, link adaptation techniques, as shown in Figure 1, mainly include with The content of lower three aspect: in a first aspect, obtaining present channel environmental parameter accurately and effectively to carry out accurate channel estimation； Second aspect chooses the channel instruction parameter for the situation that can accurately reflect channel；The third aspect, adjust configured transmission and Feedback information is returned in time by feedback channel.In general, channel quality instruction (Channel Quality Indicator, CQI) for representing the quality of present channel quality, signified channel estimation that is to say the value for obtaining the current CQI of channel.Chain The realization of road adaptive technique is established on the basis of accurately obtaining CQI.The side of two kinds of acquisition CQI exists in the prior art Method is as follows respectively:

First is that terminal is measured based on cell special reference (Cell-specific reference signal, CRS) Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR), quantization SINR are obtained Then CQI is reported to base station.It can refer to following formula (1) based on the CRS process for calculating SINR:

Wherein, RSRP_CRSIndicate the reception power of CRS；I_nIndicate interference of the adjacent cell n to CRS；N indicates noise.In addition, I_nSpecifically: when Physical Cell Identifier (physical cell identifier, PCI) mould 3 conflicts, only include adjacent cell CRS Interference to this cell CRS；When PCI mould 3 does not conflict, interference of the adjacent cell data area to this cell CRS is only included.

Second is that terminal is based on channel state information reference signals (Channel State Information-Reference Signal, CSI-RS) measurement SINR, quantify SINR and obtain CQI, is then reported to base station.The mistake of SINR is calculated based on CSI-RS Journey can refer to following formula (2):

Wherein, RSRP_CSI-RSIndicate the reception power of CSI-RS；I_nIndicate interference of the adjacent cell n to this cell CSI-RS；N Indicate noise.In addition, I_nInterference including adjacent cell data area to this cell data region.

But the method for this link circuit self-adapting in the prior art can not be reported accurately under certain application scenarios CQI, and then accurate link circuit self-adapting can not be carried out.Such as: under wave beam forming (Beamforming, BF) application scenarios, CRS resource and CSI-RS resource can not perceive BF weighted gain, thus measurement obtains CQI also more inaccuracy, and then influence The accuracy of link circuit self-adapting process.

Summary of the invention

The present invention provides a kind of method and device of link circuit self-adapting, can report accurate CQI, and then can be quasi- True carry out link circuit self-adapting adjustment.

In order to achieve the above objectives, the present invention adopts the following technical scheme:

In a first aspect, the present invention provides a kind of methods of link circuit self-adapting, comprising:

Receive the terminal capacity report message that user equipment is sent；

The transmission of the terminal capability being had according to the user equipment and the user equipment in the current statistic period Mode statistical reports instruction message as a result, sending channel quality indicator (CQI) to the user equipment, and the CQI reports instruction to disappear Breath is used to indicate the user equipment and reports CQI using mode corresponding with the terminal capability and the statistical result；

According to the CQI of the user equipment to report and the user equipment, current transmission mode is modulated and encodes Tactful MCS selects rank.

With reference to first aspect, in the first implementation of first aspect, described have according to the user equipment The transmission mode statistical result of terminal capability and the user equipment in the current statistic period, Xiang Suoshu user equipment are sent Channel quality indicator (CQI) reports instruction message, the CQI report instruction message be used to indicate the user equipment use with it is described Terminal capability and the corresponding mode of the statistical result report CQI, specifically include:

When the user equipment has the ability of measurement user's DRS (Dedicated Reference Signal) DRS and the use in the current statistic period When the transmission mode of family equipment includes at least wave beam forming BF mode, Xiang Suoshu user equipment sends CQI and reports instruction message, institute It states CQI instruction message is reported to be used to indicate the user equipment and at least report the CQI based on DRS.

The first implementation with reference to first aspect, in second of implementation of first aspect, the CQI is reported Configuration field is reported including CQI under BF mode in instruction message；

It is described to work as the ability and institute in the current statistic period that the user equipment has measurement user's DRS (Dedicated Reference Signal) DRS When stating the transmission mode of user equipment including at least wave beam forming BF mode, Xiang Suoshu user equipment sends CQI and instruction is reported to disappear Breath, the CQI report instruction message to be used to indicate the user equipment and at least report the CQI based on DRS, specifically include:

When the user equipment has the ability of measurement DRS and multiple-input and multiple-output MIMO mode in the current statistic period When ratio is equal to the ratio of the BF mode, the value of configuration field is reported to be set as the first value, institute CQI under the BF mode CQI is stated to report instruction message to be used to indicate the user equipment periodically while reporting CQI based on DRS and special based on cell With the CQI of the reference signal CRS or CQI based on channel status reference information signal CSI-RS；

Or

When the user equipment have measurement DRS ability and the ratio of the MIMO mode is greater than in the current statistic period When the ratio of the BF mode, the value of configuration field is reported to be set as the second value CQI under the BF mode, on the CQI Reporting instruction message to be used to indicate, the user equipment is acyclic to report the CQI based on DRS, periodically reports described CQI based on CRS or CSI-RS；

Or

When the user equipment have measurement DRS ability and the ratio of the MIMO mode is less than in the current statistic period When the ratio of the BF mode, the value of configuration field is reported to be set as third value CQI under the BF mode, on the CQI Report instruction message is used to indicate the user equipment and periodically reports the CQI based on DRS, it is acyclic report it is described CQI based on CRS or CSI-RS.

Second of implementation with reference to first aspect, in the third implementation of first aspect, as the user Equipment have measurement DRS ability and in the current statistic period MIMO mode ratio be equal to the BF mode ratio when, institute It states CQI and reports instruction message, be also used to indicate that the user equipment, will be upper in current report cycle when unscheduled D RS resource The BF CQI field of code word 0/1 in report message is set as particular value.

Second of implementation with reference to first aspect, in the 4th kind of implementation of first aspect, as the user Equipment has the ability of measurement DRS and the ratio of the MIMO mode is greater than the ratio of the BF mode in the current statistic period When, it further includes descending control information format DCI0 that the CQI, which reports instruction message, and the DCI0 is used to indicate user equipment non-week Phase property reports Physical Uplink Shared Channel PUSCH resource used in the CQI based on DRS；And the instruction user equipment is only Measure the corresponding Signal to Interference plus Noise Ratio SINR of DRS of the downlink subframe where the DCI0.

Second of implementation with reference to first aspect, in the 5th kind of implementation of first aspect, the CQI is reported Instruction message is also used to indicate that the user equipment ought periodically report CQI and aperiodicity based on CRS or CSI-RS to report Used in CQI based on DRS when resource contention, the CQI based on DRS is only reported；When periodically report CQI based on DRS and When aperiodicity reports resource contention used in the CQI based on CRS or CSI-RS, only report based on CRS's or CSI-RS CQI。

Second of implementation with reference to first aspect, it is described according to institute in the 6th kind of implementation of first aspect The CQI and the current transmission mode of the user equipment for stating user equipment to report are modulated and select rank with coding strategy MCS, have Body includes:

As the CQI and base based on DRS for receiving the user equipment in current report cycle periodically while reporting When the CQI and the current transmission mode of the user equipment of CRS or CSI-RS are BF mode, according to the user equipment to report CQI based on DRS carry out MCS and select rank；

Or

As the CQI and base based on DRS for receiving the user equipment in current report cycle periodically while reporting When the CQI and the current transmission mode of the user equipment of CRS or CSI-RS are MIMO mode, according on the user equipment The CQI based on CRS or CSI-RS of report carries out MCS and selects rank；

Or

When only receiving that the user equipment periodically reports in current report cycle based on CRS's or CSI-RS CQI and when the current transmission mode of the user equipment is MIMO mode, then according to the CQI based on CRS or CSI-RS into Row MCS selects rank；

Or

As the CQI based on CRS or CSI-RS for receiving the user equipment in current report cycle and periodically reporting And the user equipment current transmission mode is when being BF mode, if also receiving user equipment non-week in current report cycle The CQI based on DRS that phase property reports then carries out MCS according to the CQI based on DRS and selects rank；Otherwise, CRS is based on according to described Or the CQI of CSI-RS carries out MCS and selects rank；

Or

When only receiving the CQI based on DRS that the user equipment periodically reports and described in current report cycle When the current transmission mode of user equipment is BF mode, then MCS is carried out according to the CQI based on DRS and select rank；

Or

When receiving the CQI based on DRS and the use that the user equipment periodically reports in current report cycle When equipment current transmission mode in family is MIMO mode, if also receiving the user equipment non-week in current report cycle The CQI based on CRS or CSI-RS that phase property reports then carries out MCS according to the CQI based on CRS or CSI-RS and selects rank, no MCS is then carried out according to the CQI based on DRS and selects rank.

The 6th kind of implementation with reference to first aspect, it is described according to institute in the 7th kind of implementation of first aspect The CQI and the current transmission mode of the user equipment for stating user equipment to report be modulated with coding strategy MCS select rank it Afterwards, the method also includes:

As the CQI based on DRS for receiving the user equipment to report in current report cycle and based on CRS or CSI- When the CQI of RS, the value of the first MCS is determined according to the CQI based on DRS；It is true according to the CQI based on CRS or CSI-RS The value of fixed 2nd MCS；When the value of the first MCS is greater than the value of the 2nd MCS, determine that the next time of the user equipment passes Defeated mode is BF mode；Otherwise, it determines the next transmission mode of the user equipment is MIMO mode.

With reference to first aspect or first aspect the first, second, the third, the 4th kind, the 5th kind, the 6th kind, Any one in 7th kind of implementation, in the 8th kind of implementation of first aspect, the terminal capacity report message Including the first field, first field is for indicating whether the terminal supports measurement DRS.

Second aspect, the present invention also provides a kind of devices of link circuit self-adapting, comprising:

Receiving unit, for receiving the terminal capacity report message of user equipment transmission；

Transmission unit, the terminal capability for being had according to the user equipment and the use in the current statistic period The transmission mode statistical result of family equipment, Xiang Suoshu user equipment sends channel quality indicator (CQI) and reports instruction message, described CQI reports instruction message to be used to indicate the user equipment using side corresponding with the terminal capability and the statistical result Formula reports CQI；

The receiving unit is also used to receive the CQI of the user equipment to report；

Processing unit, for the transmission mode current according to the CQI of the user equipment to report and the user equipment It is modulated and selects rank with coding strategy MCS.

In conjunction with second aspect, in the first implementation of second aspect, the transmission unit is specifically used for:

In conjunction with the first implementation of second aspect, in second of implementation of second aspect, the transmission is single The CQI that member is sent is reported in instruction message and is reported configuration field including CQI under BF mode, and the transmission unit is specific to use In:

Or

In conjunction with second of implementation of second aspect, in the third implementation of second aspect, the transmission is single The CQI that member is sent reports instruction message, the ability for being also used to have measurement DRS when the user equipment and current statistic week When the ratio of MIMO mode is equal to the ratio of the BF mode in phase, indicate that the user equipment is not adjusted in current report cycle When spending DRS resource, the BF CQI field of the code word 0/1 in reporting message is set as particular value.

In conjunction with second of implementation of second aspect, in the 4th kind of implementation of second aspect, as the user Equipment has the ability of measurement DRS and the ratio of the MIMO mode is greater than the ratio of the BF mode in the current statistic period When, it further includes descending control information format DCI0 that the CQI that the transmission unit is sent, which reports instruction message, and the DCI0 is used Physical Uplink Shared Channel PUSCH resource used in the CQI based on DRS is reported in instruction user equipment aperiodicity；And Indicate that the user equipment only measures the corresponding Signal to Interference plus Noise Ratio of DRS of the downlink subframe where the DCI0 SINR。

In conjunction with second of implementation of second aspect, in the 5th kind of implementation of second aspect, the transmission is single The CQI that member is sent reports instruction message, is also used to indicate that the user equipment ought be reported periodically based on CRS or CSI-RS CQI and aperiodicity when reporting resource contention used in the CQI based on DRS, only report the CQI based on DRS；Work as periodicity When CQI and aperiodicity based on DRS being reported to report resource contention used in the CQI based on CRS or CSI-RS, base is only reported In the CQI of CRS or CSI-RS.

In conjunction with second of implementation of second aspect, in the 6th kind of implementation of second aspect, the processing is single Member is specifically used for:

Or

When only receiving that the user equipment periodically reports in current report cycle based on CRS's or CSI-RS CQI and when the current transmission mode of the user equipment is MIMO mode, carries out according to the CQI based on CRS or CSI-RS MCS selects rank；

Or

As the CQI based on CRS or CSI-RS for receiving the user equipment in current report cycle and periodically reporting And the user equipment current transmission mode is when being BF mode, if also receiving user equipment non-week in current report cycle The CQI based on DRS that phase property reports carries out MCS according to the CQI based on DRS and selects rank；Otherwise, according to described based on CRS or The CQI of CSI-RS carries out MCS and selects rank；

Or

When only receiving the CQI based on DRS that the user equipment periodically reports and described in current report cycle When the current transmission mode of user equipment is BF mode, MCS is carried out according to the CQI based on DRS and selects rank；

Or

In conjunction with the 6th kind of implementation of second aspect, in the 7th kind of implementation of second aspect, the processing is single Member, be also used to as the CQI based on DRS that receive the user equipment to report in current report cycle and based on CRS or When the CQI of CSI-RS, the value of the first MCS is determined according to the CQI based on DRS；According to described based on CRS's or CSI-RS CQI determines the value of the 2nd MCS；When the value of the first MCS is greater than the value of the 2nd MCS, the user equipment is determined Next transmission mode is BF mode；Otherwise, it determines the next transmission mode of the user equipment is MIMO mode.

The method and device of link circuit self-adapting provided by the invention, the terminal capability being had according to terminal device and user The statistical result of the transmission mode of equipment, instruction user equipment use side corresponding with its ability and transmission mode statistical result Formula reports CQI, then carries out MCS according to the CQI of user equipment to report and selects rank to realize that the transmission during link circuit self-adapting is joined Several adjustment reports the CQI based on CRS or CSI-RS to compare with the transmission mode for not considering user equipment in the prior art, The method of link circuit self-adapting provided by the invention takes into account the transmission mode of user equipment, instruction user equipment to report compared with For accurate CQI, and then accurate link circuit self-adapting can be realized on this basis.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Fig. 1 is the schematic diagram of the overall realization process of chain circuit self-adaptive method；

Fig. 2 is a kind of flow diagram of chain circuit self-adaptive method provided in an embodiment of the present invention；

Fig. 3 is the flow diagram of another chain circuit self-adaptive method provided in an embodiment of the present invention；

Fig. 4 is a kind of structural schematic diagram of link circuit self-adapting device provided in an embodiment of the present invention；

Fig. 5 is the structural schematic diagram of another link circuit self-adapting device provided in an embodiment of the present invention.

Specific embodiment

Below in conjunction with the attached drawing in the present embodiment, the technical solution in the present embodiment is clearly and completely described, Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the scope of protection of the invention.

The embodiment of the invention provides a kind of methods of link circuit self-adapting, can be applied to long-term evolving network (Long Term Evolution, LTE) in or other communication systems with public guide frequency and special pilot frequency for user, this method be mainly used in In the interactive process of base station and user equipment, specific implementation process of the invention is hereinafter described as executing subject using base station, such as Shown in Fig. 2, this method comprises:

101: receiving the terminal capacity report message that user equipment is sent.

Base station and user equipment need to carry out the negotiation of user equipment terminal capability first.Different types of user equipment tool Standby terminal capability is different, such as: the terminal protocol version used only supports measurement CRS for the terminal of R8, and the terminal of R11 can To support to measure CRS, measurement CSI-RS can also be supported.

During the specific implementation of this step, need in terminal capacity report message (UE Capability Information increase dl-drs-cqi-measure field in), which is used to indicate whether user equipment supports measurement to use Family DRS (Dedicated Reference Signal) (UE-specific reference signal, DRS) reports CQI.Such as: work as dl-drs-cqi- When the value of measure field is 1, show that user equipment supports measurement DRS；When the value of dl-drs-cqi-measure field is 0 When, show that user equipment does not support measurement DRS.

102: the terminal capability being had according to the user equipment and the user equipment in the current statistic period Transmission mode statistical result, Xiang Suoshu user equipment send channel quality indicator (CQI) and report instruction message, and the CQI reports finger Show that message is used to indicate the user equipment and is reported using mode corresponding with the terminal capability and the statistical result CQI。

Currently, TM1~TM10 totally ten kinds of transmission modes are defined in LTE altogether, wherein TM1~TM6 mainly more using entering more (Multiple-Input Multiple-Output, MIMO) technology out, belongs to MIMO transmission mode；TM7~TM10 is used Wave beam forming (Beamforming, BF) technology, belongs to BF transmission mode.Thus, sometime, the transmission mould of user equipment Formula may be BF mode, it is also possible to be MIMO mode.

Wherein, the transmission mode statistical result of the user equipment in the current statistic period signified in this step refers to every The statistics of the transmission mode of user equipment is carried out every a period of time.Such as: every half an hour, to user equipment in this period Interior transmission mode is counted, and obtained statistical result is 80% time of user equipment in the current statistical cycle, is in BF The transmission mode of mode, 20% time are in MIMO mode.

The transmission of the terminal capability that base station has according to user equipment and the user equipment in the current statistic period The particular content that mode statistical result configuration CQI reporting schemes and user equipment need to report.

During the specific implementation of this step, when the user equipment has measurement user's DRS (Dedicated Reference Signal) DRS's Ability and in the current statistic period user equipment transmission mode include at least wave beam forming BF mode when, Xiang Suoshu user Equipment sends CQI and reports instruction message, and the CQI reports instruction message to be used to indicate the user equipment and at least report and is based on The CQI of DRS.

Wherein, user's DRS (Dedicated Reference Signal) (UE-specific reference signal, DRS) can perceive adjacent cell Physical resource module (Physical Resource Block, the PRB) interference of occupancy situation to this cell data region, simultaneously DRS can perceive BF weighted gain by pre-coding matrix weighting；It is signified during the realization " at least to report based on DRS's CQI " includes only reporting the CQI based on DRS, also includes that the CQI based on DRS is both reported also to report based on CRS's or CSI-RS CQI。

When user equipment only has the ability of measurement CRS or CSI-RS, then use is used to indicate to user equipment transmission Family equipment reports the CQI of the CQI based on CRS or CSI-RS to report instruction message.

103: according to the current transmission mode of the CQI of the user equipment to report and the user equipment be modulated with Coding strategy MCS selects rank.

Base station needs to choose corresponding with user equipment current transmission mode after receiving the CQI of user equipment to report CQI rationally accurately to determine modulation and the value of coding strategy (Modulation and Coding Scheme, MCS).Example Such as: when the CQI based on DRS and the CQI based on CRS or CSI-RS and user equipment that receive user equipment to report simultaneously are current When transmission mode is BF mode, then MCS is carried out according to the CQI based on DRS and select rank, determine the value of MCS.

The method of link circuit self-adapting provided by the invention, the terminal capability being had according to terminal device and user equipment The statistical result of transmission mode, instruction user equipment are reported using mode corresponding with its ability and transmission mode statistical result Then CQI carries out MCS according to the CQI of user equipment to report and selects rank to realize the tune of the configured transmission during link circuit self-adapting It is whole, with the transmission mode for not considering user equipment in the prior art, the CQI based on CRS or CSI-RS is reported to compare, the present invention The method of the link circuit self-adapting of offer takes into account the transmission mode of user equipment, and instruction user equipment to report is more accurate CQI, and then can realize accurate link circuit self-adapting on this basis.

In order to clearly be explained method shown in Fig. 1, during the specific implementation of step 102, the CQI is reported Configuration (cqi_report_mode_BF_config) field is reported including CQI under BF mode in instruction message, corresponding to different CQI reporting schemes.Base station can be according to the ratio of MIMO mode and BF mode, and determination is needed based on CRS/CSI-RS on earth CQI and DRS CQI is reported simultaneously or CRS/CSI-RS CQI account for leading or DRS CQI account for it is leading to be configured flexibly this The value of field.

Thus, step 102 is " when the user equipment has the ability of measurement user's DRS (Dedicated Reference Signal) DRS and current system When counting the transmission mode of the user equipment in the period including at least wave beam forming BF mode, Xiang Suoshu user equipment sends CQI Report instruction message ", specifically include following three kinds of situations:

The first situation: when the user equipment have measurement DRS ability and how defeated multi input is in the current statistic period When the ratio of MIMO mode is equal to the ratio of the BF mode out, the value of configuration field is reported to be arranged CQI under the BF mode For the first value, the CQI reports instruction message to be used to indicate the user equipment periodically while reporting based on DRS's The CQI and CQI based on the cell special reference CRS or CQI based on channel status reference information signal CSI-RS.

Second situation: when the user equipment has the ability of measurement DRS and the MIMO mould in the current statistic period When the ratio of formula is greater than the ratio of the BF mode, namely show that the main transmission mode of user equipment is MIMO mode, by institute Stating CQI under BF mode reports the value of configuration field to be set as the second value, and the CQI reports instruction message to be used to indicate the use Family equipment is acyclic to report the CQI based on DRS, periodically reports the CQI based on CRS or CSI-RS；

The third situation: when the user equipment has the ability of measurement DRS and the MIMO mould in the current statistic period When the ratio of formula is less than the ratio of the BF mode, namely show that the prevailing transmission mode of user equipment is BF mode, it will be described CQI reports the value of configuration field to be set as third value under BF mode, and the CQI reports instruction message to be used to indicate the user Device periodically reports the CQI based on DRS, acyclic to report the CQI based on CRS or CSI-RS.

Wherein, no matter which kind of above-mentioned situation, the specific implementation of signified instruction CQI of the user equipment based on DRS are as follows: (1) if there is the BF subframe of normal consistency, then the BF subframe for measuring normal consistency obtains the CQI based on DRS；(2) if do not had The BF subframe of normal consistency then obtains the CQI based on DRS by the way of souning out scheduling BF subframe.

In addition, CQI reports configuration under the BF mode when user equipment only has the ability of measurement CRS or CSI-RS The value of field is the 4th value, and the CQI reports instruction message to be used to indicate the user equipment and only reports based on CRS or CSI- The CQI of RS.

Therefore, the application scenarios that user equipment operates mainly in BF mode and user equipment supports measurement DRS are directed to, it is existing Have in technology, indicates CQI of the user equipment to report based on CRS or CSI-RS.In the present invention, then indicate that user equipment to report is based on The CQI of DRS, has the following beneficial effects:

Such as: assuming that the CQI=12 that user is reported based on CRS, Base Transmitter antenna number is 8T, and user's receiving antenna number is 2R, BF weighted gain are 2.If user is based on DRS and reports CQI at this time, CQI=14 is reported.If that according to CRS is based on The CQI reported carries out the selection of code modulation mode, and base station can work in 12 ranks；If carried out according to the CQI reported based on DRS The selection of code modulation mode, base station can work in 14 ranks.The corresponding spectrum efficiency of CQI=12 is corresponding for 3.9023, CQI=14 Spectrum efficiency be 5.1152, then if carrying out code modulation mode selection using the CQI that reports based on DRS, frequency spectrum can be made to imitate Rate promotes (5.1152-3.9023)/3.9023=31.08%.In view of retransmitting bring loss, it is assumed that the case where the most limit, Terminal retransmission rate under 12 ranks is 0, and retransmission rate is 10% under 14 ranks, then most conservative throughput gain is { 5.1152* (1- 10%) -3.9023 }/3.9023=17.97%.

As a concrete application to above situation, CQI reports the word of this new field of configuration field under BF mode The meaning of segment value is as shown in following table table one:

Table one

Wherein, above the first value, the second value and the third value of meaning correspond respectively to " 01 ", " 10 " and " 11 " Three values；The 4th value above corresponds to " 00 " this value in table one.

Base station side can select CQI reporting schemes flexibly according to the transmission mode of user equipment.If the biography of user equipment Defeated mode is mainly BF mode, then only needs to configure cqi_report_mode_BF_config=" 11 ", and user equipment only needs The CQI based on DRS is periodically reported, the CQI based on CRS/CSI-RS is reported again in the case where event triggering, in this way may be used While accurately to measure BF gain, expense can be reduced to the greatest extent.If the transmission mode of user equipment is mainly MIMO mode, It only needs to configure cqi_report_mode_BF_config=" 10 ", user equipment only need to periodically be reported based on CRS/ The CQI of CSI-RS only just reports the CQI based on DRS in the case where event triggers, can reduce expense to the greatest extent in this way.

CQI of the user equipment side based on DRS reports shown in content table table two to table four specific as follows:

Table two

Field	Bit bit wide (unit: bit)
		Broadband CQI	4
BF CQI	4

Table three

Table four

CQI's based on CRS or CSI-RS reports shown in content table table five to table seven specific as follows:

Table five

Field	Bit bit wide (unit: bit)
		Broadband CQI	4

Table six

Table seven

You need to add is that being directed to when the user equipment has the ability for measuring DRS and in the current statistic period The ratio of MIMO mode is equal to this case that the BF mode, in addition to instruction user equipment is periodically reported based on DRS simultaneously CQI and CQI based on CRS or CSI-RS except, the CQI reports instruction message, is also used to indicate that the user equipment exists In current report cycle when unscheduled D RS resource, the BF CQI field of the code word 0/1 in reporting message is set as particular value. Wherein, it is provided according to agreement, which can be 1111.

Also you need to add is that, it is directed to when the user equipment has the ability for measuring DRS and in the current statistic period The ratio of the MIMO mode is greater than this case that the ratio of the BF mode, and the CQI reports instruction message in addition to for referring to Show that user equipment reports the CQI based on CRS or CSI-RS using periodic report mode, is reported and be based on using aperiodic reporting schemes Except the CQI of DRS, it further includes (the downlink control of descending control information format 0 that the CQI, which reports instruction message, Information format0, DCI0), the DCI0 is used to indicate user equipment aperiodicity and reports the CQI institute based on DRS Physical Uplink Shared Channel (Physical Uplink Shared Channel, the PUSCH) resource used；And described in instruction User equipment only measures the corresponding Signal to Interference plus Noise Ratio SINR of DRS of the downlink subframe where the DCI0；In addition, institute State CQI and report instruction message, be also used to indicate the user equipment ought periodically report CQI based on CRS or CSI-RS with it is non- When periodically reporting resource contention used in the CQI based on DRS, the CQI based on DRS is only reported.Similarly, it is reported when periodically When CQI and aperiodicity based on DRS report resource contention used in the CQI based on CRS or CSI-RS, only reports and be based on The CQI of CRS or CSI-RS.

As the specific implementation of method shown in Fig. 2, in step 103 " according to the CQI of the user equipment to report and described The current transmission mode of user equipment, which is modulated, selects rank with coding strategy MCS " specific implementation during, specifically include following Six kinds of situations:

The first situation: when the user equipment is received in current report cycle periodically and meanwhile report based on The CQI of DRS and CQI based on CRS or CSI-RS and when the current transmission mode of the user equipment is BF mode, according to described The CQI based on DRS of user equipment to report carries out MCS and selects rank.

Second situation: when the user equipment is received in current report cycle periodically and meanwhile report based on The CQI of DRS and CQI based on CRS or CSI-RS and when the current transmission mode of the user equipment is MIMO mode, according to institute The CQI based on CRS or CSI-RS for stating user equipment to report carries out MCS and selects rank.

The third situation: when only receiving that the user equipment periodically reports in current report cycle based on CRS Or the CQI and the user equipment current transmission mode of CSI-RS is then based on CRS or CSI- according to described when being MIMO mode The CQI of RS carries out MCS and selects rank.

4th kind of situation: when receiving that the user equipment periodically reports in current report cycle based on CRS or The CQI of CSI-RS and when the current transmission mode of the user equipment is BF mode, if also received in current report cycle The CQI based on DRS that user equipment aperiodicity reports then carries out MCS according to the CQI based on DRS and selects rank；Otherwise, root MCS, which is carried out, according to the CQI based on CRS or CSI-RS selects rank.

5th kind of situation: when only receiving that the user equipment periodically reports in current report cycle based on DRS CQI and the user equipment current transmission mode when being BF mode, then MCS choosing is carried out according to the CQI based on DRS Rank.

6th kind of situation: when receiving that the user equipment periodically reports in current report cycle based on DRS's CQI and when the current transmission mode of the user equipment is MIMO mode, if also received in current report cycle described The CQI based on CRS or CSI-RS that user equipment aperiodicity reports, then according to the CQI based on CRS or CSI-RS into Row MCS selects rank, otherwise carries out MCS according to the CQI based on DRS and selects rank.

You need to add is that current user equipment is in if user equipment has just been switched to BF mode by MIMO mode BF mode then may not receive the CQI based on DRS of user equipment transmission in current period, can adjust by using souning out The mode of degree BF subframe obtains the progress of the CQI based on DRS MCS and rank or a cycle is selected to use based on CRS's or CSI-RS CQI progress MCS's selects rank, and recycling is based on DRS after receiving the CQI based on DRS of user equipment periodical launch later CQI carry out MCS select rank.

It is " described according to the user equipment to report in above-mentioned steps 103 as the supplement of method shown in above-mentioned each figure CQI and the current transmission mode of the user equipment are modulated and select rank with coding strategy MCS " after, as shown in figure 3, institute State method further include:

201: as the CQI based on DRS for receiving the user equipment to report in current report cycle and based on CRS or When the CQI of CSI-RS, the value of the first MCS is determined according to the CQI based on DRS；According to described based on CRS's or CSI-RS CQI determines the value of the 2nd MCS；When the value of the first MCS is greater than the value of the 2nd MCS, the user equipment is determined Next transmission mode is BF mode；Otherwise, it determines the next transmission mode of the user equipment is MIMO mode.

After carrying out MCS and selecting rank, if not only having had received the CQI based on DRS in current period, but also has received and be based on The CQI of CRS or CSI-RS then needs to determine the value of corresponding MCS respectively according to two kinds of CQI, then according to the big of the value of MCS It is small to determine user equipment transmission mode next time.

As the specific implementation of method shown in above-mentioned each figure, the embodiment of the invention also provides a kind of dresses of link circuit self-adapting It sets, as shown in figure 4, specifically including:

Receiving unit 301, for receiving the terminal capacity report message of user equipment transmission.

Transmission unit 302, the terminal capability for being had according to the user equipment and the institute in the current statistic period The transmission mode statistical result of user equipment is stated, Xiang Suoshu user equipment sends channel quality indicator (CQI) and reports instruction message, institute Stating CQI reports instruction message to be used to indicate the user equipment using corresponding with the terminal capability and the statistical result Mode reports CQI.

Receiving unit 301 is also used to receive the CQI of the user equipment to report；

Processing unit 303, for the transmission mould current according to the CQI of the user equipment to report and the user equipment Formula, which is modulated, selects rank with coding strategy MCS.

Further, the transmission unit 302, is specifically used for:

Further, the CQI that the transmission unit 302 is sent is reported in instruction message including on CQI under BF mode Configuration field is reported, the transmission unit 302 is specifically used for:

Or

Further, the CQI that the transmission unit 302 is sent reports instruction message, is also used to set as the user For the ability for having measurement DRS and when the ratio of MIMO mode is equal to the ratio of the BF mode in the current statistic period, instruction The user equipment is in current report cycle when unscheduled D RS resource, by the BF CQI field of the code word 0/1 in reporting message It is set as particular value.

Further, when the user equipment has the ability of measurement DRS and the MIMO mode in the current statistic period Ratio when being greater than the ratio of the BF mode, the CQI that the transmission unit 302 is sent reports under instruction message further includes Row controls information format DCI0, and the DCI0 is used to indicate user equipment aperiodicity and reports object used in the CQI based on DRS Manage Uplink Shared Channel PUSCH resource；And the instruction user equipment only measures the DRS of the downlink subframe where the DCI0 Corresponding Signal to Interference plus Noise Ratio SINR.

Further, the CQI that the transmission unit 302 is sent reports instruction message, is also used to indicate the user Equipment ought periodically report CQI and aperiodicity based on CRS or CSI-RS that resource used in the CQI based on DRS is reported to rush When prominent, the CQI based on DRS is only reported；When periodicity reports CQI and aperiodicity based on DRS to report based on CRS or CSI-RS CQI used in resource contention when, only report the CQI based on CRS or CSI-RS.

Further, the processing unit 303, is specifically used for:

Or

Further, the processing unit 303, is also used to:

As the specific implementation of method shown in above-mentioned each figure, the embodiment of the invention also provides a kind of dresses of link circuit self-adapting It sets, as shown in figure 5, specifically including receiver 401, processor 402, transmitter 403, memory 404 and bus 405, and receives Device 401, processor 402, transmitter 403 and memory 404 are interconnected by bus 405, in which:

Receiver 401, for receiving the terminal capacity report message of user equipment transmission.

Processor 402, terminal capability for being had according to the user equipment and in the current statistic period described in The transmission mode statistical result of user equipment determines CQI reporting schemes.

Transmitter 403 reports instruction message for sending channel quality indicator (CQI) to the user equipment, on the CQI Report instruction message is used to indicate the user equipment and reports CQI using the CQI reporting schemes that the processor 402 determines.

Receiver 401 is also used to receive the CQI of the user equipment to report.

Processor 402 is also used to the transmission mould current according to the CQI of the user equipment to report and the user equipment Formula, which is modulated, selects rank with coding strategy MCS.

Further, the processor 402, is specifically also used to:

When the user equipment has the ability of measurement user's DRS (Dedicated Reference Signal) DRS and the use in the current statistic period When the transmission mode of family equipment includes at least wave beam forming BF mode, determine that the CQI reporting schemes of the user equipment are at least Report the CQI based on DRS；Correspondingly, the transmitter 403, which sends CQI to the user equipment, reports instruction message, it is described CQI reports instruction message to be used to indicate the user equipment and at least reports the CQI based on DRS.

Further, the CQI that the transmitter 403 is sent is reported in instruction message to be reported including CQI under BF mode Configuration field, in which:

Or

Further, the CQI that the transmitter 403 is sent reports instruction message, is also used to when the user equipment Have measurement DRS ability and in the current statistic period MIMO mode ratio be equal to the BF mode ratio when, indicate institute User equipment is stated in current report cycle when unscheduled D RS resource, the BF CQI field of the code word 0/1 in reporting message is set It is set to particular value.

Further, when the user equipment has the ability of measurement DRS and the MIMO mode in the current statistic period Ratio when being greater than the ratio of the BF mode, it further includes downlink that the CQI that the transmitter 403 is sent, which reports instruction message, Information format DCI0 is controlled, the DCI0 is used to indicate user equipment aperiodicity and reports physics used in the CQI based on DRS Uplink Shared Channel PUSCH resource；And the instruction user equipment only measures DRS pairs of the downlink subframe where the DCI0 The Signal to Interference plus Noise Ratio SINR answered.

Further, the CQI that the transmitter 403 is sent reports instruction message, is also used to indicate that the user sets It is standby that CQI and aperiodicity based on CRS or CSI-RS ought periodically be reported to report resource contention used in the CQI based on DRS When, only report the CQI based on DRS；When periodicity reports CQI and aperiodicity based on DRS to report based on CRS's or CSI-RS Used in CQI when resource contention, the CQI based on CRS or CSI-RS is only reported.

Further, the processor 402, is specifically used for:

Or

Further, the processor 402 is also used to that the user equipment to report ought be received in current report cycle CQI based on DRS and when the CQI based on CRS or CSI-RS, the value of the first MCS is determined according to the CQI based on DRS；Root The value of the 2nd MCS is determined according to the CQI based on CRS or CSI-RS；When the value of the first MCS is greater than the 2nd MCS's When value, determine that the next transmission mode of the user equipment is BF mode；Otherwise, it determines the transmission next time mould of the user equipment Formula is MIMO mode.

It should be noted that processor 402 described in the embodiment of the present invention can be a processor, it is also possible to multiple The general designation of processing element.For example, the processor can be central processing unit (Central Processing Unit, abbreviation CPU), it is also possible to specific integrated circuit (Application Specific Integrated Circuit, abbreviation ASIC), Or be arranged to implement one or more integrated circuits of the embodiment of the present invention, such as: one or more microprocessors (digital signal processor, abbreviation DSP), or, one or more field programmable gate array (Field Programmable Gate Array, abbreviation FPGA).

Memory 404 can be a storage device, be also possible to the general designation of multiple memory elements, and for storing and can hold Line program code etc..And memory may include random access memory (RAM), also may include nonvolatile memory (non- Volatile memory), for example, magnetic disk storage, flash memory (Flash) etc..

It is total that bus 405 can be industry standard architecture (Industry Standard Architecture, ISA) Line, external equipment interconnection (Peripheral Component, PCI) bus or extended industry-standard architecture (Extended Industry Standard Architecture, EISA) bus etc..The bus can be divided into address bus, data/address bus, control Bus processed etc..Only to be indicated with a thick line in Fig. 5, it is not intended that an only bus or a type of convenient for indicating Bus.

Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can borrow Help software that the mode of required common hardware is added to realize, naturally it is also possible to which the former is more preferably by hardware, but in many cases Embodiment.Based on this understanding, the portion that technical solution of the present invention substantially in other words contributes to the prior art Dividing can be embodied in the form of software products, which stores in a readable storage medium, such as count The floppy disk of calculation machine, hard disk or CD etc., including some instructions are used so that computer equipment (it can be personal computer, Server or the network equipment etc.) execute method described in each embodiment of the present invention.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.

Claims

1. a kind of method of link circuit self-adapting characterized by comprising

Receive the terminal capacity report message that user equipment is sent；

The transmission mode of the terminal capability being had according to the user equipment and the user equipment in the current statistic period Statistical result, Xiang Suoshu user equipment send channel quality indicator (CQI) and report instruction message, and the CQI reports instruction message to use CQI is reported using mode corresponding with the terminal capability and the statistical result in the instruction user equipment；When described User equipment have measurement user's DRS (Dedicated Reference Signal) DRS ability and in the current statistic period user equipment transmission mould When formula includes at least wave beam forming BF mode, Xiang Suoshu user equipment sends CQI and reports instruction message, and the CQI reports instruction Message is used to indicate the user equipment and at least reports the CQI based on DRS；It specifically includes: having the BF subframe of normal consistency, then survey The BF subframe of amount normal consistency obtains the CQI based on DRS；Alternatively, BF is not dispatched in the BF subframe of normal consistency, then use exploration The mode of subframe obtains the CQI based on DRS；

It is modulated according to the current transmission mode of the CQI of the user equipment to report and the user equipment and coding strategy MCS selects rank；Specifically include: when the user equipment is received in current report cycle periodically and meanwhile report based on DRS CQI and CQI based on CRS or CSI-RS and the user equipment current transmission mode when being BF mode, according to the use The CQI based on DRS that family equipment reports carries out MCS and selects rank；Or works as and receive the user equipment in current report cycle The CQI based on DRS and the CQI based on CRS or CSI-RS and the user equipment that periodicity reports simultaneously current transmission mould When formula is MIMO mode, the CQI according to the user equipment to report based on CRS or CSI-RS carries out MCS and selects rank；Or When only receiving the CQI based on CRS or CSI-RS that the user equipment periodically reports and described in current report cycle When the current transmission mode of user equipment is MIMO mode, then MCS is carried out according to the CQI based on CRS or CSI-RS and select rank； Or works as and receive the CQI based on CRS or CSI-RS and institute that the user equipment periodically reports in current report cycle When to state the current transmission mode of user equipment be BF mode, if also receiving user equipment aperiodicity in current report cycle The CQI based on DRS reported then carries out MCS according to the CQI based on DRS and selects rank；Otherwise, according to described based on CRS or The CQI of CSI-RS carries out MCS and selects rank；Or works as and only receive what the user equipment periodically reported in current report cycle CQI based on DRS and when the current transmission mode of the user equipment is BF mode, then carry out according to the CQI based on DRS MCS selects rank；Or works as and receive the CQI based on DRS and institute that the user equipment periodically reports in current report cycle State the current transmission mode of user equipment be MIMO mode when, if also receiving the user equipment in current report cycle The CQI based on CRS or CSI-RS that aperiodicity reports then carries out MCS according to the CQI based on CRS or CSI-RS and selects rank, Otherwise MCS is carried out according to the CQI based on DRS and selects rank.

2. the method for link circuit self-adapting according to claim 1, which is characterized in that the CQI, which is reported in instruction message, to be wrapped It includes CQI under BF mode and reports configuration field；

When the user equipment have measurement DRS ability and in the current statistic period multiple-input and multiple-output MIMO mode ratio Equal to the BF mode ratio when, report the value of configuration field to be set as the first value CQI under the BF mode, it is described CQI reports instruction message to be used to indicate the user equipment periodically while reporting CQI based on DRS and based on cell-specific The CQI of reference signal CRS or CQI based on channel status reference information signal CSI-RS；

Or

When the user equipment have the ability of measurement DRS and in the current statistic period ratio of the MIMO mode be greater than it is described When the ratio of BF mode, the value of configuration field is reported to be set as the second value CQI under the BF mode, the CQI reports finger Show that message is used to indicate that the user equipment is acyclic to report the CQI based on DRS, periodically reports described be based on The CQI of CRS or CSI-RS；

Or

When the user equipment have the ability of measurement DRS and in the current statistic period ratio of the MIMO mode be less than it is described When the ratio of BF mode, the value of configuration field is reported to be set as third value CQI under the BF mode, the CQI reports finger Show that message is used to indicate the user equipment and periodically reports the CQI based on DRS, it is acyclic to report described be based on The CQI of CRS or CSI-RS.

3. the method for link circuit self-adapting according to claim 2, which is characterized in that when the user equipment has measurement The ability of DRS and in the current statistic period MIMO mode ratio be equal to the BF mode ratio when, the CQI reports instruction Message is also used to indicate the user equipment in current report cycle when unscheduled D RS resource, by the code word in reporting message 0/1 BF CQI field is set as particular value.

4. the method for link circuit self-adapting according to claim 2, which is characterized in that when the user equipment has measurement The ability of DRS and in the current statistic period MIMO mode ratio be greater than the BF mode ratio when, the CQI is reported Instruction message further includes descending control information format DCI0, and the DCI0, which is used to indicate user equipment aperiodicity and reports, to be based on Physical Uplink Shared Channel PUSCH resource used in the CQI of DRS；And the instruction user equipment only measures the DCI0 The corresponding Signal to Interference plus Noise Ratio SINR of the DRS of the downlink subframe at place.

5. the method for link circuit self-adapting according to claim 2, which is characterized in that the CQI reports instruction message, also uses CQI and aperiodicity based on CRS or CSI-RS ought be periodically reported to report the CQI based on DRS in the instruction user equipment When used resource contention, the CQI based on DRS is only reported；When periodicity reports CQI and aperiodicity based on DRS to report When resource contention used in the CQI based on CRS or CSI-RS, the CQI based on CRS or CSI-RS is only reported.

6. according to the method described in claim 5, it is characterized in that, the CQI and institute according to the user equipment to report It states after the current transmission mode of user equipment is modulated and selects rank with coding strategy MCS, the method also includes:

As the CQI based on DRS for receiving the user equipment to report in current report cycle and based on CRS's or CSI-RS When CQI, the value of the first MCS is determined according to the CQI based on DRS；Is determined according to the CQI based on CRS or CSI-RS The value of two MCS；When the value of the first MCS is greater than the value of the 2nd MCS, the transmission next time mould of the user equipment is determined Formula is BF mode；Otherwise, it determines the next transmission mode of the user equipment is MIMO mode.

7. method according to any one of claims 1 to 6, which is characterized in that the terminal capacity report message includes the One field, first field is for indicating whether the terminal supports measurement DRS.

8. a kind of device of link circuit self-adapting characterized by comprising

Transmission unit, the terminal capability for being had according to the user equipment and the user in the current statistic period set Standby transmission mode statistical result, Xiang Suoshu user equipment send channel quality indicator (CQI) and report instruction message, on the CQI Report instruction message is used to indicate the user equipment using in mode corresponding with the terminal capability and the statistical result Report CQI；When the user equipment has the ability of measurement user's DRS (Dedicated Reference Signal) DRS and the user in the current statistic period When the transmission mode of equipment includes at least wave beam forming BF mode, Xiang Suoshu user equipment sends CQI and reports instruction message, described CQI reports instruction message to be used to indicate the user equipment and at least reports the CQI based on DRS；It specifically includes: having normal consistency BF subframe, then the BF subframe for measuring normal consistency obtain the CQI based on DRS；Alternatively, the not no BF subframe of normal consistency, then adopt The CQI based on DRS is obtained with the mode for souning out scheduling BF subframe；The receiving unit is also used to receive on the user equipment The CQI of report；

Processing unit, for being carried out according to the CQI of the user equipment to report and the user equipment current transmission mode Modulation selects rank with coding strategy MCS；

The processing unit, is specifically used for: when receiving the user equipment in current report cycle periodically while reporting The CQI based on DRS and the CQI based on CRS or CSI-RS and the user equipment current transmission mode when being BF mode, root MCS, which is carried out, according to the CQI based on DRS of the user equipment to report selects rank；Or it is described when being received in current report cycle The CQI based on DRS and the CQI based on CRS or CSI-RS and the user equipment that user equipment periodically reports simultaneously are current Transmission mode when being MIMO mode, CQI according to the user equipment to report based on CRS or CSI-RS carries out MCS Select rank；Or when only receiving that the user equipment periodically reports in current report cycle based on CRS's or CSI-RS CQI and when the current transmission mode of the user equipment is MIMO mode, carries out according to the CQI based on CRS or CSI-RS MCS selects rank；Or when receiving that the user equipment periodically reports in current report cycle based on CRS's or CSI-RS CQI and when the current transmission mode of the user equipment is BF mode, if also receiving user equipment in current report cycle The CQI based on DRS that aperiodicity reports carries out MCS according to the CQI based on DRS and selects rank；Otherwise, it is based on according to described The CQI of CRS or CSI-RS carries out MCS and selects rank；Or it is periodical when only receiving the user equipment in current report cycle When the CQI based on DRS and the user equipment reported current transmission mode is BF mode, according to the CQI based on DRS It carries out MCS and selects rank；Or works as and receive the CQI based on DRS that the user equipment periodically reports in current report cycle And the user equipment current transmission mode is when being MIMO mode, if also receiving the user in current report cycle The CQI based on CRS or CSI-RS that equipment aperiodicity reports then carries out MCS according to the CQI based on CRS or CSI-RS Rank is selected, MCS is otherwise carried out according to the CQI based on DRS and selects rank.

9. the device of link circuit self-adapting according to claim 8, which is characterized in that

The CQI that the transmission unit is sent is reported in instruction message and is reported configuration field, the hair including CQI under BF mode Unit is sent, is specifically used for:

Or

When the user equipment have the ability of measurement DRS and in the current statistic period ratio of the MIMO mode be greater than it is described When the ratio of BF mode, report the value of configuration field for the second value of setting CQI under the BF mode, the CQI reports finger Show that message is used to indicate that the user equipment is acyclic to report the CQI based on DRS, periodically reports described be based on The CQI of CRS or CSI-RS；

Or

10. the device of link circuit self-adapting according to claim 9, which is characterized in that the transmission unit is sent described CQI reports instruction message, the ability and MIMO mode in the current statistic period for being also used to have measurement DRS when the user equipment Ratio when being equal to the ratio of the BF mode, indicate the user equipment in current report cycle when unscheduled D RS resource, The BF CQI field of code word 0/1 in reporting message is set as particular value.

11. the device of link circuit self-adapting according to claim 9, which is characterized in that when the user equipment has measurement The ability of DRS and when the ratio of the MIMO mode is greater than the ratio of the BF mode in the current statistic period, transmissions is singly It further includes descending control information format DCI0 that the CQI that member is sent, which reports instruction message, and the DCI0 is used to indicate user and sets Standby aperiodicity reports Physical Uplink Shared Channel PUSCH resource used in the CQI based on DRS；And the instruction user Equipment only measures the corresponding Signal to Interference plus Noise Ratio SINR of DRS of the downlink subframe where the DCI0.

12. the device of link circuit self-adapting according to claim 9, which is characterized in that the transmission unit is sent described CQI reports instruction message, is also used to indicate that the user equipment ought periodically report CQI and non-week based on CRS or CSI-RS When phase property reports resource contention used in the CQI based on DRS, the CQI based on DRS is only reported；It reports when periodically based on DRS CQI and aperiodicity when reporting resource contention used in the CQI based on CRS or CSI-RS, only report based on CRS or CSI- The CQI of RS.

13. device according to claim 12, which is characterized in that

The processing unit is also used to as the CQI based on DRS for receiving the user equipment to report in current report cycle When with CQI based on CRS or CSI-RS, the value of the first MCS is determined according to the CQI based on DRS；CRS is based on according to described Or the CQI of CSI-RS determines the value of the 2nd MCS；When the value of the first MCS is greater than the value of the 2nd MCS, described in determination The next transmission mode of user equipment is BF mode；Otherwise, it determines the next transmission mode of the user equipment is MIMO mode.