CN106888062A - CQI estimates, SINR determines method and relevant device - Google Patents

CQI estimates, SINR determines method and relevant device Download PDF

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Publication number
CN106888062A
CN106888062A CN201510918267.3A CN201510918267A CN106888062A CN 106888062 A CN106888062 A CN 106888062A CN 201510918267 A CN201510918267 A CN 201510918267A CN 106888062 A CN106888062 A CN 106888062A
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China
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terminal
dmrs
frequency resource
running time
corresponding
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CN201510918267.3A
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Chinese (zh)
Inventor
宋扬
苏昕
刘龙
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电信科学技术研究院
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Priority to CN201510918267.3A priority Critical patent/CN106888062A/en
Publication of CN106888062A publication Critical patent/CN106888062A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/0632Channel quality parameters, e.g. channel quality indicator [CQI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/309Measuring or estimating channel quality parameters
    • H04B17/336Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Abstract

Estimate the invention discloses a kind of CQI, SINR determines method and relevant device, be used to solve the problems, such as to need to cover CRS or CSI RS in cell using CRS or CSI RS measurements CQI and be distributed in horizontal peacekeeping vertical dimension, have and far there are near all users.The method is:Base station determines the CQI of the corresponding running time-frequency resource of the terminal that terminal the last time reports, determine the information of the first equivalent channel of data Layer corresponding with a DMRS in the delivery time of the DMRS running time-frequency resource, a DMRS is to calculate the DMRS that the CQI is used;Base station determines the information of each self-corresponding second equivalent channel of each data Layer of the running time-frequency resource in next scheduling instance of terminal;Base station determines each self-corresponding SINR of each data Layer of next scheduling instance running time-frequency resource of terminal according to the information of the first equivalent channel, the information of the second equivalent channel and CQI.

Description

CQI estimates, SINR determines method and relevant device

Technical field

(CQI, Channel are indicated the present invention relates to communication technical field, more particularly to a kind of channel quality Quality Indicator) estimate, Signal to Interference plus Noise Ratio (Signal-to-Interference and Noise Ratio, SINR) Determine method and relevant device.

Background technology

In existing Long Term Evolution (Long Term Evolution, LTE) system, base station sends descending Cell special reference (Cell-Specific Reference Signal, CRS) or channel condition information are referred to Signal (Channel State Information-Reference Signal, CSI-RS);Terminal be based on CRS or CSI-RS measure channel state informations (CSI, Channel State Information) are simultaneously reported to base station, For base station scheduling.

Usual CSI includes order instruction (Rank Indicator, RI), pre-coding matrix instruction (Precoding Matrix Indicator, PMI), channel quality indicate (Channel Quality Indicator, CQI) etc., Wherein CQI reflects signal power and interference and the ratio information of noise power that terminal is received, in base station It is extremely important when scheduling and selection Modulation and Coding Scheme (Modulation and Coding Scheme, MCS). Usual CQI is to be based on CRS or CSI-RS, and according to certain multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) transmission mode calculated.

Extensive antenna system is one of key technology that following mobile radio system is used.Obtained from CSI Take for angle, time division duplex (Time Division Duplex, TDD) mode is very suitable on a large scale Antenna system, because base station can be according to channel reciprocity, by up detection reference signal (Sounding Reference Signal, SRS) measurement channel matrix, reduce descending pilot frequency expense.

Measured using CRS or CSI-RS in the extensive antenna system using two-dimensional antenna array at present CQI needs to cover CRS or CSI-RS in cell and is distributed in horizontal peacekeeping vertical dimension, has far and have near All users.

A kind of mode is only to send CRS or CSI-RS, the wave beam for so being formed by portion of base stations transmitting antenna The scope of wider angle can be covered, but CRS the or CSI-RS power that user receives can be far below process The power of the data service of wave beam forming.If by CRS or CSI-RS port by wave beam forming, might The user of some angles occurs can not be covered to.

Another way is that base station sends user oriented CSI-RS, the i.e. wave beam forming of CSI-RS for each Individual user, problem is the wave beam forming how base station determines the CSI-RS towards each user;Work as in addition and use When family is very more, the expense towards the CSI-RS of each user is very big.

The content of the invention

The embodiment of the present invention provides a kind of CQI methods of estimation, SINR and determines method and relevant device, is used to Solve to need to cover CRS or CSI-RS in cell using CRS or CSI-RS measurements CQI to be distributed in Horizontal peacekeeping vertical dimension, the problem for having all users for far having near.

Concrete technical scheme provided in an embodiment of the present invention is as follows:

The embodiment of the invention provides a kind of Signal to Interference plus Noise Ratio SINR and determine method, including:

Base station determines the channel quality of the corresponding running time-frequency resource of the terminal that terminal the last time reports CQI, the CQI is indicated to report the interference noise that measured before the moment and most according to CQI by the terminal The information of the corresponding equivalent channels of the first demodulated reference signal DMRS received when near once scheduled is estimated Obtain, wherein, a DMRS is to calculate the DMRS that the CQI is used;

The base station determine in running time-frequency resource described in the delivery time of a DMRS of the terminal with The information of the first equivalent channel of the corresponding data Layer of the first DMRS;

The base station determines that each data Layer of the running time-frequency resource of the terminal is each in next scheduling instance The information of self-corresponding second equivalent channel;

The base station according to the information of first equivalent channel of the terminal, the running time-frequency resource each The information and the CQI of each self-corresponding second equivalent channel of data Layer, determine next scheduling instance Each self-corresponding first Signal to Interference plus Noise Ratio SINR of each data Layer of the running time-frequency resource of the terminal.

In possible implementation method, when the base station determines the transmission of a DMRS of the terminal The information of the first equivalent channel of data Layer corresponding with a DMRS in the running time-frequency resource is carved, Including:

The base station receives according to the last time before a DMRS delivery times of the terminal The detection reference signal SRS of the terminal determines the channel matrix of the running time-frequency resource, and determines the terminal A DMRS delivery time described in the corresponding data Layers of a DMRS in the running time-frequency resource The precoding vector for being used, described first etc. is determined according to the channel matrix and the precoding vector Imitate the information of channel;Or,

The base station receives according to the last time before a DMRS delivery times of the terminal The detection reference signal SRS of the terminal determines the channel matrix of the running time-frequency resource, and determines the terminal A DMRS delivery time described in the corresponding data Layers of a DMRS in the running time-frequency resource The figuration vector for being used, the first equivalent letter is determined according to the channel matrix and figuration vector The information in road.

In possible implementation method, the base station determines the time-frequency of the terminal in next scheduling instance The information of each self-corresponding second equivalent channel of each data Layer of resource, including:

Detection ginseng of the base station according to the last terminal for receiving before next scheduling instance Examine signal SRS and determine the channel matrix of the running time-frequency resource, and determine the running time-frequency resource of the terminal Each self-corresponding precoding vector of each data Layer, each data of the running time-frequency resource according to the terminal The respective precoding vector of layer and the channel matrix determine each data Layer of the running time-frequency resource respectively The information of each self-corresponding second equivalent channel;

Or,

Detection ginseng of the base station according to the last terminal for receiving before next scheduling instance Examine signal SRS and determine the channel matrix of the running time-frequency resource, and determine the running time-frequency resource of the terminal Each self-corresponding figuration vector of each data Layer, each data Layer of the running time-frequency resource according to the terminal Respective figuration is vectorial and the channel matrix determines each data Layer of the running time-frequency resource each respectively The information of corresponding second equivalent channel.

In possible implementation method, the base station according to the information of first equivalent channel of the terminal, The information of each self-corresponding second equivalent channel of each data Layer of the running time-frequency resource and described CQI, determines each data Layer each self-corresponding of the running time-frequency resource of terminal described in next scheduling instance One Signal to Interference plus Noise Ratio SINR, including:

The base station determines that the corresponding CQI of the CQI report the running time-frequency resource of terminal described in the moment Second SINR value of the corresponding data Layer of the first DMRS;

The base station is directed to each data Layer of the running time-frequency resource of terminal described in next scheduling instance respectively, Calculate the gain of information and the information of first equivalent channel of the second equivalent channel of the data Layer, root Gain according to gained determines the data Layer corresponding described first with the product of second SINR value SINR value.

In possible implementation method, the base station is respectively for the time-frequency of terminal described in next scheduling instance Each data Layer of resource, calculates the information and the described first equivalent letter of the second equivalent channel of the data Layer The gain of the information in road, the gain according to gained determines the data Layer with the product of second SINR value Corresponding first SINR value, including:

The base station is directed to each data Layer of the running time-frequency resource of terminal described in next scheduling instance respectively, Calculate the ratio of power and the power of first equivalent channel of the second equivalent channel of the data Layer, root Ratio according to gained determines the data Layer corresponding described first with the product of second SINR value SINR value.

In possible implementation method, a DMRS is transmitted by default DMRS port DMRS。

In possible implementation method, the default DMRS port is that the base station is advance with the terminal The DMRS port of agreement.

In the embodiment of the present invention, base station determines the CQI for reporting terminal the last time, and determines that calculating should The corresponding data Layers of a DMRS in the delivery time running time-frequency resource of the DMRS that CQI is used The information of the first equivalent channel, and determine each data Layer of the running time-frequency resource of next scheduling instance terminal The information of each self-corresponding second equivalent messages, information, the running time-frequency resource according to first equivalent channel The information and the CQI of each self-corresponding second equivalent channel of each data Layer, determine that next scheduling instance should Each self-corresponding SINR of each data Layer of the running time-frequency resource of terminal such that it is able to according to every number Relatively accurately estimate that next scheduling instance sends data and used to the terminal according to the respective SINR of layer MCS, improve handling capacity.

The embodiment of the present invention additionally provides a kind of channel quality indicator (CQI) method of estimation, including:

Terminal determines the information of equivalent channel according to the demodulated reference signal DMRS for receiving;

The terminal reports the CQI that the moment reports estimation to obtain to base station in channel quality indicator (CQI), described The DMRS that CQI is received when being interference noise and the scheduled the last time according to measurement determines The information of equivalent channel is estimated to obtain.

In possible implementation method, the DMRS received when described the last scheduled, is by pre- If DMRS port receive DMRS.

In possible implementation method, the default DMRS port is that the terminal is advance with the base station The DMRS port of agreement.

In the embodiment of the present invention, terminal determines the information of equivalent channel according to the DMRS that base station sends, The CQI moment is reported to report what is estimated according to the information of the equivalent channel and the interference noise of measurement to base station CQI, it is to avoid need for CRS or CSI-RS to cover cell using CRS or CSI-RS measurements CQI Inside be distributed in horizontal peacekeeping vertical dimension, have the problem of all users for far having near, can save descending CRS, The expense of CSI-RS.

The embodiment of the present invention additionally provides a kind of base station, including:

First processing module, for determining that the corresponding time-frequency of the terminal that terminal the last time reports is provided The channel quality indicator (CQI) in source, the CQI is reported measured before the moment dry by the terminal according to CQI Disturb the corresponding equivalent letters of the first demodulated reference signal DMRS received when noise and scheduled the last time The information in road is estimated to obtain, wherein, a DMRS is to calculate the DMRS that the CQI is used;

Second processing module, for determine the terminal a DMRS delivery time described in when The information of the first equivalent channel of data Layer corresponding with a DMRS in frequency resource;

3rd processing module, in next scheduling instance, determine the terminal the running time-frequency resource it is every The information of individual each self-corresponding second equivalent channel of data Layer;

Fourth processing module, for information, the time-frequency of first equivalent channel according to the terminal The information and the CQI of each self-corresponding second equivalent channel of each data Layer of resource, it is determined that under Each self-corresponding first Signal to Interference plus Noise Ratio of each data Layer of the running time-frequency resource of terminal described in one scheduling instance SINR。

In possible implementation method, the Second processing module specifically for:

According to the last terminal for receiving before a DMRS delivery times of the terminal Detection reference signal SRS determine the channel matrix of the running time-frequency resource, and determine described the of the terminal The corresponding data Layers of a DMRS are used in the running time-frequency resource described in the delivery time of one DMRS Precoding vector, first equivalent channel is determined according to the channel matrix and the precoding vector Information;Or,

According to the last terminal for receiving before a DMRS delivery times of the terminal Detection reference signal SRS determine the channel matrix of the running time-frequency resource, and determine described the of the terminal The corresponding data Layers of a DMRS are used in the running time-frequency resource described in the delivery time of one DMRS Figuration vector, the letter of first equivalent channel is determined according to the channel matrix and figuration vector Breath.

In possible implementation method, the 3rd processing module specifically for:

According to the detection reference signal of the last terminal for receiving before next scheduling instance SRS determines the channel matrix of the running time-frequency resource, and determines every number of the running time-frequency resource of the terminal According to each self-corresponding precoding vector of layer, each data Layer of the running time-frequency resource according to the terminal is each Precoding vector and the channel matrix determine that each data Layer of the running time-frequency resource is each right respectively The information of second equivalent channel answered;

Or,

According to the detection reference signal of the last terminal for receiving before next scheduling instance SRS determines the channel matrix of the running time-frequency resource, and determines every number of the running time-frequency resource of the terminal According to each self-corresponding figuration vector of layer, each data Layer of the running time-frequency resource according to the terminal is respective Figuration is vectorial and the channel matrix determines that each data Layer of the running time-frequency resource is each self-corresponding respectively The information of second equivalent channel.

In possible implementation method, the fourth processing module specifically for:

Determine that the corresponding CQI of the CQI report described the first of the running time-frequency resource of terminal described in the moment Second SINR value of the corresponding data Layers of DMRS;

Each data Layer of the running time-frequency resource of terminal described in next scheduling instance is directed to respectively, calculates described The gain of the information of the second equivalent channel of data Layer and the information of first equivalent channel, according to gained Gain and the product of second SINR value determine corresponding first SINR value of the data Layer.

In possible implementation method, the fourth processing module specifically for:

Each data Layer of the running time-frequency resource of terminal described in next scheduling instance is directed to respectively, calculates described The ratio of the power of the second equivalent channel of data Layer and the power of first equivalent channel, according to gained Ratio and the product of second SINR value determine corresponding first SINR value of the data Layer.

In possible implementation method, a DMRS is transmitted by default DMRS port DMRS。

In possible implementation method, the default DMRS port is that the base station is advance with the terminal The DMRS port of agreement.

The embodiment of the present invention additionally provides a kind of terminal, including:

Processing module, the information for determining equivalent channel according to the demodulated reference signal DMRS for receiving;

Reporting module, for reporting the moment to report what estimation was obtained to base station in channel quality indicator (CQI) Described in CQI, the CQI are received when being interference noise and the scheduled the last time according to measurement The information of the equivalent channel that DMRS determines is estimated to obtain.

In possible implementation method, the DMRS received when described the last scheduled, is by pre- If DMRS port receive DMRS.

In possible implementation method, the default DMRS port is that the terminal is advance with the base station The DMRS port of agreement.

The embodiment of the present invention additionally provides another terminal, and the terminal mainly includes processor, memory and receipts Hair machine, wherein, transceiver is used to receiving and sending data under the control of a processor, is preserved in memory Default program, processor is used to read the program preserved in memory, and procedure below is performed according to the program:

According to the information that equivalent channel is determined by the demodulated reference signal DMRS of transceiver;

The CQI for reporting estimation to obtain to base station by transceiver constantly, institute are reported in channel quality indicator (CQI) The DMRS received when CQI is interference noise and the scheduled the last time according to measurement is stated to determine Equivalent channel information estimate obtain.

In possible implementation method, the DMRS received when described the last scheduled, is by pre- If DMRS port receive DMRS.

In possible implementation method, the default DMRS port is that the terminal is advance with the base station The DMRS port of agreement.

Another base station is additionally provided in the embodiment of the present invention, the base station mainly include processor, memory and Transceiver, wherein, transceiver is used to receive under the control of a processor and sends data, is preserved in memory There is default program, processor is used to read the program preserved in memory, and following mistake is performed according to the program Journey:

Determine that the channel quality of the corresponding running time-frequency resource of the terminal that terminal the last time reports is indicated CQI, the CQI report the interference noise and the last time that were measured before the moment according to CQI by the terminal The information of the corresponding equivalent channels of the first demodulated reference signal DMRS received when scheduled is estimated to obtain, Wherein, a DMRS is to calculate the DMRS that the CQI is used;

Determine the terminal a DMRS delivery time described in running time-frequency resource with described first The information of the first equivalent channel of the corresponding data Layers of DMRS;

In next scheduling instance, determine that each data Layer of the running time-frequency resource of the terminal is each self-corresponding The information of the second equivalent channel;

The information of first equivalent channel according to the terminal, each data Layer of the running time-frequency resource are each The information and the CQI of self-corresponding second equivalent channel, determine terminal described in next scheduling instance The running time-frequency resource each self-corresponding first Signal to Interference plus Noise Ratio SINR of each data Layer.

In possible implementation method, before processor is according to a DMRS delivery times of the terminal The detection reference signal SRS of the terminal that the last time receives determines the channel square of the running time-frequency resource Battle array, and determine the terminal a DMRS delivery time described in the corresponding numbers of a DMRS According to the precoding vector that layer is used in the running time-frequency resource, according to the channel matrix and the precoding Vector determines the information of first equivalent channel;Or,

According to the last terminal for receiving before a DMRS delivery times of the terminal Detection reference signal SRS determine the channel matrix of the running time-frequency resource, and determine described the of the terminal The corresponding data Layers of a DMRS are used in the running time-frequency resource described in the delivery time of one DMRS Figuration vector, the letter of first equivalent channel is determined according to the channel matrix and figuration vector Breath.

In possible implementation method, processor is according to the last institute for receiving before next scheduling instance The detection reference signal SRS for stating terminal determines the channel matrix of the running time-frequency resource, and determines the terminal Each self-corresponding precoding vector of each data Layer of the running time-frequency resource, according to the time-frequency of the terminal The respective precoding vector of each data Layer of resource and the channel matrix determine the time-frequency money respectively The information of each self-corresponding second equivalent channel of each data Layer in source;

Or,

According to the detection reference signal of the last terminal for receiving before next scheduling instance SRS determines the channel matrix of the running time-frequency resource, and determines every number of the running time-frequency resource of the terminal According to each self-corresponding figuration vector of layer, each data Layer of the running time-frequency resource according to the terminal is respective Figuration is vectorial and the channel matrix determines that each data Layer of the running time-frequency resource is each self-corresponding respectively The information of second equivalent channel.

In possible implementation method, processor determines that the corresponding CQI of the CQI report terminal described in the moment The running time-frequency resource the corresponding data Layers of a DMRS the second SINR value;

Each data Layer of the running time-frequency resource of terminal described in next scheduling instance is directed to respectively, calculates described The gain of the information of the second equivalent channel of data Layer and the information of first equivalent channel, according to gained Gain and the product of second SINR value determine corresponding first SINR value of the data Layer.

In possible implementation method, processor is provided for the time-frequency of terminal described in next scheduling instance respectively Each data Layer in source, calculates the power and first equivalent channel of the second equivalent channel of the data Layer Power ratio, the ratio according to gained determines the data Layer pair with the product of second SINR value First SINR value answered.

In possible implementation method, a DMRS is transmitted by default DMRS port DMRS。

In possible implementation method, the default DMRS port is that the base station is advance with the terminal The DMRS port of agreement.

Brief description of the drawings

Fig. 1 is that terminal carries out the method flow schematic diagram of CQI estimations in the embodiment of the present invention;

Fig. 2 is that the process of the equivalent channel at terminal calculating scheduled moment DMRS in the embodiment of the present invention is shown It is intended to;

Fig. 3 is that base station determines the method flow schematic diagram of SINR in the embodiment of the present invention;

Fig. 4 be the embodiment of the present invention in base station derive to terminal send the DMRS moment the 2nd SINR mistake Journey schematic diagram;

Fig. 5 is the power of first equivalent channel at base station computing terminal scheduled moment in the embodiment of the present invention Process schematic;

Fig. 6 be the embodiment of the present invention in base station determine that the process of a SINR of current scheduling moment terminal is shown It is intended to;

Fig. 7 is terminal structure schematic diagram in the embodiment of the present invention;

Fig. 8 is architecture of base station schematic diagram in the embodiment of the present invention;

Fig. 9 is another terminal structure schematic diagram in the embodiment of the present invention;

Figure 10 is another architecture of base station schematic diagram in the embodiment of the present invention.

Specific embodiment

In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing to this hair It is bright to be described in further detail, it is clear that described embodiment is only a part of embodiment of the invention, Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing Go out all other embodiment obtained under the premise of creative work, belong to the scope of protection of the invention.

Embodiment of the present invention terminal is estimated and reports the core concept of CQI to be:Terminal is in scheduled transmission data When measure the information that default descending DMRS port calculates the equivalent channel of the DMRS port, in CQI If reporting moment terminal to be once scheduled or be scheduled, to base station repeats according to the dry of measurement The information of the equivalent channel of the default DMRS port is estimated when disturbing noise and scheduled the last time The CQI that meter is obtained.

In first embodiment of the invention, as shown in figure 1, terminal carries out the method detailed flow of CQI estimations such as Under:

Step 101:Terminal determines the information of equivalent channel according to the DMRS for receiving.

In implementation, terminal receives the DMRS that base station sends when the terminal transmission data is dispatched every time, according to The DMRS determines the information of equivalent channel.

Specifically, the packet of equivalent channel is containing the raw channel matrix and pre-coding matrix between dual-mode antenna The information of the equivalent channel of composite signal.

Specifically, terminal determines the DMRS that default DMRS port is received in scheduled transmission data The information of corresponding equivalent channel, the interference noise of information and measurement according to the equivalent channel is estimated CQI.Wherein, default DMRS port is the DMRS port that terminal is made an appointment with base station.

For example, terminal is scheduled in the corresponding multiple descending DMRS ports of multiple data Layers of transmission data, It is base station and the descending DMRS port of terminal agreement to select the descending DMRS port of relatively low sequence number.

Step 102:It is root that terminal reports the CQI that the moment reports estimation to obtain to base station, the CQI in CQI The letter of the equivalent channel that the DMRS received when being scheduled according to the interference noise and the last time of measurement determines Breath estimation is obtained.

Wherein, the CQI of terminal reports the moment to be indicated by signaling by base station, can periodically report or non- Periodically report.

Specifically, terminal reports the CQI that the moment reports to base station in CQI, can be terminal on CQI It is equivalent that the DMRS received when being scheduled according to the interference noise of measurement and the last time at quarter that gives the correct time determines The information of channel is estimated in the CQI for the obtaining, or CQI preserved for terminal, according to the interference of measurement The information of the equivalent channel that the DMRS received when noise and scheduled the last time determines estimates what is obtained CQI。

In implementation, if terminal was once scheduled or was scheduled, the moment is reported to base station in CQI Default DMRS port is received when the interference noise of reporting measurement is with the last being scheduled DMRS pairs The information of the equivalent channel answered estimates the CQI for obtaining.

In implementation, terminal sends SRS according to the instruction cycle of base station.

In one specific embodiment, terminal once scheduled transmission data be based on it is descending with what base station was arranged The DMRS of DMRS port estimates the information of equivalent channel.Terminal reports the moment in CQI, if it is determined that The terminal never by base station scheduling mistake, then reports default initial CQI to base station;If it is determined that the terminal was once Through being scheduled or being scheduled, then the CQI, the CQI that the estimation is obtained that estimation obtains are reported to base station It is the equivalent channel of the DMRS port determination arranged with base station when the last scheduled according to the terminal, And the terminal the last scheduled moment or CQI report the average interference for the previous period at moment to make an uproar What sound was obtained.

Specifically, it is assumed that the institute that default DMRS port is estimated when terminal k is scheduled according to the last time There is equivalent channel vector of the reception antenna on Resource Unit RE (m, q) to beWherein l1Represent pre- If the corresponding data Layer of DMRS port.What if default DMRS port was used on RE (m, q) Precoding vector isSoWherein Hk(m, q) is base The all transmitting antennas stood are to the raw channel matrix between all reception antennas of terminal k.It is possible thereby to base The equivalent channel vector estimated in default DMRS port calculates the SINR of RE (m, q), is expressed as:

Wherein σ2It is interference and noise power, such as σ2Can be measured by CRS and obtained, or logical Cross DMRS measurements to obtain, or when this terminal scheduled moment or CQI report the last period at moment Between mean interference noise power.

Effective SINR is calculated on the corresponding running time-frequency resources of CQI are reported:To each RE on the running time-frequency resource or The SINR of each subcarrier carries out being calculated effective SINR according to some way, and computational methods such as index has Effect SINR mappings (Exponential Effective SINR Mapping, EESM) or the effective SINR of mutual information Mapping (Mutual Information Effective SINR Mapping, MIESM) etc..Finally to obtaining Effective SINR carry out quantifying to obtain the CQI on the running time-frequency resource.

The terminal is illustrated in figure 2 to calculate equivalent channel and report the process schematic of CQI, wherein, D Descending sub frame is represented, U represents sub-frame of uplink, and S represents special subframe.Adjusted in a descending sub frame base station Degree terminal k, terminal k receive DMRS in the descending sub frame, and according to the DMRS ends arranged with base station The DMRS that mouth is received calculates equivalent channel powerTerminal CQI report constantly arrive before, according to What the DMRS received with the DMRS port of base station agreement when the terminal is the last scheduled was calculated Equivalent channel powerAnd CQI reports the average interference noise for the previous period at moment to estimate CQI, And report the CQI.

In the embodiment of the present invention, terminal determines the information of equivalent channel according to the DMRS that base station sends, The CQI moment is reported to report what is estimated according to the information of the equivalent channel and the interference noise of measurement to base station CQI, it is to avoid need for CRS or CSI-RS to cover cell using CRS or CSI-RS measurements CQI Inside be distributed in horizontal peacekeeping vertical dimension, have the problem of all users for far having near, can save descending CRS, The expense of CSI-RS, when default DMRS port is one, CQI feedback amount is small, and due to DMRS It is that, by user oriented precoding or wave beam forming, the accuracy of CQI measurements is very high.

In second embodiment of the invention, as shown in figure 3, base station determines Signal to Interference plus Noise Ratio The method detailed flow of (Signal-to-Interference and Noise Ratio, SINR) is as follows:

Step 301:Base station determines the corresponding running time-frequency resource of the terminal that terminal the last time reports CQI, the CQI are reported the interference noise that measured before the moment and the last time to be adjusted by the terminal according to CQI The information of the corresponding equivalent channels of a DMRS received when spending is estimated to obtain.

Wherein, a DMRS is to calculate the DMRS used during the CQI.

It is preferred that a DMRS is the DMRS transmitted by default DMRS port.

Specifically, the default DMRS port is the DMRS that the base station is made an appointment with the terminal Port.

Specifically, base station is sent when to scheduled terminal transmission data by multiple DMRS ports DMRS, one of DMRS port is the DMRS port of base station and terminal agreement, the agreement DMRS port determines equivalent channel and estimates CQI according to the equivalent channel for determining for terminal.

Step 302:Base station is determined in the delivery time of a DMRS of the terminal running time-frequency resource with first The information of the first equivalent channel of the corresponding data Layers of DMRS.

Wherein, data Layer corresponding with a DMRS, as transmits the DMRS port of a DMRS Corresponding data Layer.

In implementation, the information of the first equivalent channel is specifically as follows equivalent channel matrix, equivalent channel power etc..

Specifically, the running time-frequency resource is in multiple running time-frequency resources that the terminal is distributed in total system bandwidth Individual running time-frequency resource, the calculating of the information of the first equivalent channel of other running time-frequency resources for distributing to terminal The Cheng Junyu processes are identical, and here is omitted.

In implementation, base station estimates the channel matrix of the terminal based on the SRS that terminal sends.

Specifically, base station receives signal by measuring the SRS of each terminal, carries out uplink channel estimation, and The down channel matrix of each terminal is obtained according to channel reciprocity.

Specifically, the determination process of the information of the first equivalent channel is:

SRS of the base station according to the last terminal for receiving before a DMRS delivery times of the terminal Determine the channel matrix of the running time-frequency resource, and determine the delivery time first of a DMRS of the terminal The precoding vector that the corresponding data Layers of DMRS are used in the running time-frequency resource, according to the channel matrix and The precoding vector determines the information of the first equivalent channel of the running time-frequency resource;

Or,

Base station is according to the last terminal for receiving before a DMRS delivery times of the terminal SRS determines the channel matrix of the running time-frequency resource, and determines the delivery time of a DMRS of the terminal The figuration vector that the corresponding data Layers of first DMRS are used in the running time-frequency resource, according to the channel matrix And figuration vector determines the information of the first equivalent channel of the running time-frequency resource.

Step 303:Base station determines each data Layer of the running time-frequency resource of the terminal in next scheduling instance The information of each self-corresponding second equivalent channel.

In implementation, the information of the second equivalent channel can be equivalent channel matrix, equivalent channel power etc..

Specifically, the determination process of the information of the second equivalent channel is:

Base station determines the time-frequency according to the SRS of the last terminal for receiving before next scheduling instance The channel matrix of resource, and determine each self-corresponding precoding of each data Layer of the running time-frequency resource of the terminal Vector, the respective precoding vector of each data Layer and the channel square of the running time-frequency resource according to the terminal Battle array determines the information of each self-corresponding second equivalent channel of each data Layer of the running time-frequency resource respectively;

Or,

Base station determines the time-frequency according to the SRS of the last terminal for receiving before next scheduling instance The channel matrix of resource, and determine each self-corresponding figuration of each data Layer of the running time-frequency resource of the terminal to Amount, the respective figuration vector of each data Layer and the channel matrix point of the running time-frequency resource according to the terminal The information of each self-corresponding second equivalent channel of each data Layer of the running time-frequency resource is not determined.

Step 304:Base station is according to the information of the first equivalent channel of the terminal, every number of the running time-frequency resource According to the information and the CQI of each self-corresponding second equivalent channel of layer, next scheduling instance terminal is determined Each self-corresponding SINR of each data Layer of the running time-frequency resource.

Specifically, base station is according to each self-corresponding SINR of each data Layer of the running time-frequency resource, it is determined that Next scheduling instance sends Modulation and Coding Scheme (the Modulation and that data are used to the terminal Coding Scheme, MCS).

In implementation, base station determines that each data Layer of the running time-frequency resource of next scheduling instance terminal is each right The detailed process of the SINR for answering is:

Base station determines that the corresponding CQI of the CQI report a DMRS of the running time-frequency resource of the terminal constantly Second SINR value of corresponding data Layer;Base station provides for the time-frequency of next scheduling instance terminal respectively Each data Layer in source, calculates the information of the second equivalent channel of the data Layer and the information of the first equivalent channel Gain, gain according to gained and the product of the second SINR value determine the corresponding SINR of the data Layer Value.

Specifically, as a example by the power with the information of equivalent channel as equivalent channel, base station is directed to next tune respectively Each data Layer of the running time-frequency resource of the moment terminal is spent, the work(of the second equivalent channel of the data Layer is calculated The ratio of the power of rate and the first equivalent channel, the product of ratio and the second SINR value according to gained determines Corresponding first SINR value of the data Layer.

In one specific embodiment, base station according to the CQI of terminal to report derive the running time-frequency resource this is default The corresponding data Layer l of DMRS port1The second SINR value, and preserve derive obtain the second SINR value. Specifically, as shown in figure 4, base station is in sub-frame of uplink n1The CQI of reception terminal to report, according to this CQI derives terminal k in the corresponding data Layer l of default descending DMRS port1The second SINR valueEqually, base station is according to sub-frame of uplink n2The CQI that moment reports derives terminal k default The corresponding data Layer l of descending DMRS port1The second SINR value

Base station schedules terminals and during to the terminal transmission data, preserve the default descending of the current time terminal The power of the first equivalent channel of the corresponding data Layer of DMRS port.Specifically, as shown in figure 5, the moment The corresponding data Layer l of the descending DMRS port of agreement of n terminals k1The power of the first equivalent channel represent For:

Wherein,Represent the corresponding data Layer l of default descending DMRS port at moment n terminal k1's The power of the first equivalent channel, Hk(n-ΔnSRS) represent moment n before the last receiving terminal k The channel matrix that the moment of SRS measures according to the SRS, Δ nSRSRepresent that base station receives the SRS of terminal k Moment to the time difference between the current scheduling moment,Represent the default descending of moment n terminal k The corresponding data Layer l of DMRS port1The precoding of use or wave beam forming vector.

As shown in fig. 6, base station derives terminal k, and in next scheduling instance, (moment n, illustrates respectively in figure Bright two scheduling instance n1And n2) process of each data Layer the first SINR is:

The corresponding default descending DMRS port correspondences of CQI of the last terminal to report that base station preserves Data Layer l1The second SINR value, be expressed as:Wherein, n represents current time, Δ n Represent that base station the last time receiving terminal k reports the moment to the time difference between current time of CQI;

The terminal that base station preserves is set in advance at the scheduled moment corresponding to the CQI for reporting the CQI moment to report The power of the first equivalent channel of the corresponding data Layer of row DMRS port, is expressed as: Wherein, n represents current time, Δ npRepresent the quilt corresponding to the CQI that terminal k reports the CQI moment to report Scheduling instance is to the time difference between current time;

Second equivalent channel power of each data Layer of current time terminal that base station calculates, is expressed as:Wherein,Represent the data at current time n terminal k Layer liThe precoding of use or wave beam forming vector;

A SINR of each data Layer of current time terminal is calculated, is expressed as:

Wherein,It is the number of current time n terminal k According to layer liThe first SINR value, α represents SINR Dynamic genes.Wherein, SINR Dynamic genes can be Report what the methods such as self-adaptative adjustment were obtained by ACK, NACK.

In the embodiment of the present invention, base station determines the CQI for reporting terminal the last time, and determines that calculating should The corresponding data Layers of a DMRS in the delivery time running time-frequency resource of the DMRS that CQI is used The information of the first equivalent channel, and determine each data Layer of the running time-frequency resource of next scheduling instance terminal The information of each self-corresponding second equivalent messages, information, the running time-frequency resource according to first equivalent channel The information and the CQI of each self-corresponding second equivalent channel of each data Layer, determine that next scheduling instance should Each self-corresponding SINR of each data Layer of the running time-frequency resource of terminal such that it is able to according to every number Relatively accurately estimate that next scheduling instance sends data and used to the terminal according to the respective SINR of layer MCS, improve handling capacity.

Based on same inventive concept, in third embodiment of the invention provide a kind of terminal, the terminal it is specific Implement to can be found in the description in above method embodiment, repeat part and repeat no more, as shown in fig. 7, the end End mainly includes:

Processing module 701, the information for determining equivalent channel according to the demodulated reference signal DMRS for receiving;

Reporting module 702, for reporting the moment to report what estimation was obtained to base station in channel quality indicator (CQI) Described in CQI, the CQI are received when being interference noise and the scheduled the last time according to measurement The information of the equivalent channel that DMRS determines is estimated to obtain.

In implementation, the DMRS received when described the last scheduled, is by default DMRS The DMRS that port receives.

It is preferred that the default DMRS port is the DMRS that the terminal is made an appointment with the base station Port.

Based on same inventive concept, in fourth embodiment of the invention provide a kind of base station, the base station it is specific Implement the description reference can be made to above method embodiment part, repeat part and repeat no more, as shown in figure 8, should Base station mainly includes:

First processing module 801, during for determining that the terminal that terminal the last time reports is corresponding one The channel quality indicator (CQI) of frequency resource, the CQI is measured before reporting the moment according to CQI by the terminal Interference noise and it is the last scheduled when the first demodulated reference signal DMRS for receiving it is corresponding etc. The information for imitating channel is estimated to obtain, wherein, a DMRS is to calculate the DMRS that the CQI is used;

Second processing module 802, for determine the terminal a DMRS delivery time described in The information of the first equivalent channel of data Layer corresponding with a DMRS in running time-frequency resource;

3rd processing module 803, in next scheduling instance, determining the running time-frequency resource of the terminal Each self-corresponding second equivalent channel of each data Layer information;

Fourth processing module 804, it is information for first equivalent channel according to the terminal, described The information and the CQI of each self-corresponding second equivalent channel of each data Layer of running time-frequency resource, really Each self-corresponding first letter of each data Layer for fixing the running time-frequency resource of terminal described in a scheduling instance is dry Make an uproar and compare SINR.

In implementation, Second processing module 802 specifically for:

According to the last terminal for receiving before a DMRS delivery times of the terminal Detection reference signal SRS determine the channel matrix of the running time-frequency resource, and determine described the of the terminal The corresponding data Layers of a DMRS are used in the running time-frequency resource described in the delivery time of one DMRS Precoding vector, first equivalent channel is determined according to the channel matrix and the precoding vector Information;Or,

According to the last terminal for receiving before a DMRS delivery times of the terminal Detection reference signal SRS determine the channel matrix of the running time-frequency resource, and determine described the of the terminal The corresponding data Layers of a DMRS are used in the running time-frequency resource described in the delivery time of one DMRS Figuration vector, the letter of first equivalent channel is determined according to the channel matrix and figuration vector Breath.

In implementation, the 3rd processing module specifically for:

According to the detection reference signal of the last terminal for receiving before next scheduling instance SRS determines the channel matrix of the running time-frequency resource, and determines every number of the running time-frequency resource of the terminal According to each self-corresponding precoding vector of layer, each data Layer of the running time-frequency resource according to the terminal is each Precoding vector and the channel matrix determine that each data Layer of the running time-frequency resource is each right respectively The information of second equivalent channel answered;

Or,

According to the detection reference signal of the last terminal for receiving before next scheduling instance SRS determines the channel matrix of the running time-frequency resource, and determines every number of the running time-frequency resource of the terminal According to each self-corresponding figuration vector of layer, each data Layer of the running time-frequency resource according to the terminal is respective Figuration is vectorial and the channel matrix determines that each data Layer of the running time-frequency resource is each self-corresponding respectively The information of second equivalent channel.

In implementation, fourth processing module specifically for:

Determine that the corresponding CQI of the CQI report described the first of the running time-frequency resource of terminal described in the moment Second SINR value of the corresponding data Layers of DMRS;

Each data Layer of the running time-frequency resource of terminal described in next scheduling instance is directed to respectively, calculates described The gain of the information of the second equivalent channel of data Layer and the information of first equivalent channel, according to gained Gain and the product of second SINR value determine corresponding first SINR value of the data Layer.

Specifically, fourth processing module specifically for:

Each data Layer of the running time-frequency resource of terminal described in next scheduling instance is directed to respectively, calculates described The ratio of the power of the second equivalent channel of data Layer and the power of first equivalent channel, according to gained Ratio and the product of second SINR value determine corresponding first SINR value of the data Layer.

Wherein, a DMRS is the DMRS transmitted by default DMRS port.

Specifically, the default DMRS port is the DMRS that the base station is made an appointment with the terminal Port.

Based on same inventive concept, in fifth embodiment of the invention provide a kind of terminal, the terminal it is specific Implement the description reference can be made to above method embodiment part, repeat part and repeat no more, as shown in figure 9, should Terminal mainly includes processor 901, memory 902 and transceiver 903, wherein, transceiver 903 is used for Data are received and sent under the control of processor 901, default program is preserved in memory 902, locate Reason device 901 is used to read the program preserved in memory 902, and procedure below is performed according to the program:

According to the information that equivalent channel is determined by the demodulated reference signal DMRS of transceiver;

The CQI for reporting estimation to obtain to base station by transceiver constantly, institute are reported in channel quality indicator (CQI) The DMRS received when CQI is interference noise and the scheduled the last time according to measurement is stated to determine Equivalent channel information estimate obtain.

In implementation, the DMRS received when described the last scheduled, is by default DMRS The DMRS that port receives.

It is preferred that the default DMRS port is the DMRS that the terminal is made an appointment with the base station Port.

Wherein, connected by bus between processor, memory and transceiver, bus architecture can include appointing The bus and bridge of the interconnection of quantity of anticipating, the one or more processors for specifically being represented by processor and memory generation The various circuits of the memory of table are linked together.Bus architecture can also be by such as ancillary equipment, voltage-stablizer Various other circuits with management circuit or the like are linked together, and these are all well known in the art , therefore, no longer it is described further herein.EBI provides interface.Transceiver can be Multiple element, i.e., including transmitter and transceiver, there is provided for logical with various other devices over a transmission medium The unit of letter.Processor is responsible for bus architecture and common treatment, and memory can store processor and exist Perform the data used during operation.

Based on same inventive concept, in sixth embodiment of the invention provide a kind of base station, the base station it is specific Implement the description reference can be made to above method embodiment part, repeat part and repeat no more, as shown in Figure 10, The base station mainly includes processor 1001, memory 1002 and transceiver 1003, wherein, transceiver 1003 For being received under the control of processor 1001 and sending data, default journey is preserved in memory 1002 Sequence, processor 1001 is used to read the program preserved in memory 1002, and following mistake is performed according to the program Journey:

Determine that the channel quality of the corresponding running time-frequency resource of the terminal that terminal the last time reports is indicated CQI, the CQI report the interference noise and the last time that were measured before the moment according to CQI by the terminal The information of the corresponding equivalent channels of the first demodulated reference signal DMRS received when scheduled is estimated to obtain, Wherein, a DMRS is to calculate the DMRS that the CQI is used;

Determine the terminal a DMRS delivery time described in running time-frequency resource with described first The information of the first equivalent channel of the corresponding data Layers of DMRS;

In next scheduling instance, determine that each data Layer of the running time-frequency resource of the terminal is each self-corresponding The information of the second equivalent channel;

The information of first equivalent channel according to the terminal, each data Layer of the running time-frequency resource are each The information and the CQI of self-corresponding second equivalent channel, determine terminal described in next scheduling instance The running time-frequency resource each self-corresponding first Signal to Interference plus Noise Ratio SINR of each data Layer.

In implementation, processor connects according to the last time before a DMRS delivery times of the terminal The detection reference signal SRS of the terminal for receiving determines the channel matrix of the running time-frequency resource, and determines institute The corresponding data Layers of a DMRS are when described described in the delivery time of the DMRS for stating terminal The precoding vector that frequency resource is used, according to the channel matrix and the precoding vector determine The information of the first equivalent channel;Or,

According to the last terminal for receiving before a DMRS delivery times of the terminal Detection reference signal SRS determine the channel matrix of the running time-frequency resource, and determine described the of the terminal The corresponding data Layers of a DMRS are used in the running time-frequency resource described in the delivery time of one DMRS Figuration vector, the letter of first equivalent channel is determined according to the channel matrix and figuration vector Breath.

In implementation, spy of the processor according to the last terminal for receiving before next scheduling instance Survey reference signal SRS and determine the channel matrix of the running time-frequency resource, and determine the time-frequency money of the terminal Each self-corresponding precoding vector of each data Layer in source, the running time-frequency resource according to the terminal each The respective precoding vector of data Layer and the channel matrix determine every number of the running time-frequency resource respectively According to the information of each self-corresponding second equivalent channel of layer;

Or,

According to the detection reference signal of the last terminal for receiving before next scheduling instance SRS determines the channel matrix of the running time-frequency resource, and determines every number of the running time-frequency resource of the terminal According to each self-corresponding figuration vector of layer, each data Layer of the running time-frequency resource according to the terminal is respective Figuration is vectorial and the channel matrix determines that each data Layer of the running time-frequency resource is each self-corresponding respectively The information of second equivalent channel.

In implementation, processor determines that the corresponding CQI of the CQI report the time-frequency of terminal described in the moment Second SINR value of the corresponding data Layers of the first DMRS of resource;

Each data Layer of the running time-frequency resource of terminal described in next scheduling instance is directed to respectively, calculates described The gain of the information of the second equivalent channel of data Layer and the information of first equivalent channel, according to gained Gain and the product of second SINR value determine corresponding first SINR value of the data Layer.

Specifically, processor is directed to every number of the running time-frequency resource of terminal described in next scheduling instance respectively According to layer, the power of the second equivalent channel of the data Layer and the ratio of the power of first equivalent channel are calculated Value, ratio according to gained and the product of second SINR value determine the data Layer corresponding described the One SINR value.

Wherein, a DMRS is the DMRS transmitted by default DMRS port.

Specifically, the default DMRS port is the DMRS that the base station is made an appointment with the terminal Port.

Wherein, connected by bus between processor, memory and transceiver, bus architecture can include appointing The bus and bridge of the interconnection of quantity of anticipating, the one or more processors for specifically being represented by processor and memory generation The various circuits of the memory of table are linked together.Bus architecture can also be by such as ancillary equipment, voltage-stablizer Various other circuits with management circuit or the like are linked together, and these are all well known in the art , therefore, no longer it is described further herein.EBI provides interface.Transceiver can be Multiple element, i.e., including transmitter and transceiver, there is provided for logical with various other devices over a transmission medium The unit of letter.Processor is responsible for bus architecture and common treatment, and memory can store processor and exist Perform the data used during operation.

It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or meter Calculation machine program product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or knot Close the form of the embodiment in terms of software and hardware.And, the present invention can be used and wherein wrapped at one or more Containing computer usable program code computer-usable storage medium (including but not limited to magnetic disk storage and Optical memory etc.) on implement computer program product form.

The present invention is produced with reference to method according to embodiments of the present invention, equipment (system) and computer program The flow chart and/or block diagram of product is described.It should be understood that can by computer program instructions realize flow chart and / or block diagram in each flow and/or the flow in square frame and flow chart and/or block diagram and/ Or the combination of square frame.These computer program instructions to all-purpose computer, special-purpose computer, insertion can be provided The processor of formula processor or other programmable data processing devices is producing a machine so that by calculating The instruction of the computing device of machine or other programmable data processing devices is produced for realizing in flow chart one The device of the function of being specified in individual flow or multiple one square frame of flow and/or block diagram or multiple square frames.

These computer program instructions may be alternatively stored in can guide computer or the treatment of other programmable datas to set In the standby computer-readable memory for working in a specific way so that storage is in the computer-readable memory Instruction produce include the manufacture of command device, the command device realization in one flow of flow chart or multiple The function of being specified in one square frame of flow and/or block diagram or multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices, made Obtain and series of operation steps is performed on computer or other programmable devices to produce computer implemented place Reason, so as to the instruction performed on computer or other programmable devices is provided for realizing in flow chart one The step of function of being specified in flow or multiple one square frame of flow and/or block diagram or multiple square frames.

Obviously, those skilled in the art can carry out various changes and modification without deviating from this hair to the present invention Bright spirit and scope.So, if it is of the invention these modification and modification belong to the claims in the present invention and Within the scope of its equivalent technologies, then the present invention is also intended to comprising these changes and modification.

Claims (20)

1. a kind of Signal to Interference plus Noise Ratio SINR determines method, it is characterised in that including:
Base station determines the channel quality of the corresponding running time-frequency resource of the terminal that terminal the last time reports CQI, the CQI is indicated to report the interference noise that measured before the moment and most according to CQI by the terminal The information of the corresponding equivalent channels of the first demodulated reference signal DMRS received when near once scheduled is estimated Obtain, wherein, a DMRS is to calculate the DMRS that the CQI is used;
The base station determine in running time-frequency resource described in the delivery time of a DMRS of the terminal with The information of the first equivalent channel of the corresponding data Layer of the first DMRS;
The base station determines that each data Layer of the running time-frequency resource of the terminal is each in next scheduling instance The information of self-corresponding second equivalent channel;
The base station according to the information of first equivalent channel of the terminal, the running time-frequency resource each The information and the CQI of each self-corresponding second equivalent channel of data Layer, determine next scheduling instance Each self-corresponding first Signal to Interference plus Noise Ratio SINR of each data Layer of the running time-frequency resource of the terminal.
2. the method for claim 1, it is characterised in that the base station determines the institute of the terminal State data Layer corresponding with a DMRS in running time-frequency resource described in the delivery time of a DMRS The information of the first equivalent channel, including:
The base station receives according to the last time before a DMRS delivery times of the terminal The detection reference signal SRS of the terminal determines the channel matrix of the running time-frequency resource, and determines the terminal A DMRS delivery time described in the corresponding data Layers of a DMRS in the running time-frequency resource The precoding vector for being used, described first etc. is determined according to the channel matrix and the precoding vector Imitate the information of channel;Or,
The base station receives according to the last time before a DMRS delivery times of the terminal The detection reference signal SRS of the terminal determines the channel matrix of the running time-frequency resource, and determines the terminal A DMRS delivery time described in the corresponding data Layers of a DMRS in the running time-frequency resource The figuration vector for being used, the first equivalent letter is determined according to the channel matrix and figuration vector The information in road.
3. the method for claim 1, it is characterised in that the base station in next scheduling instance, Determine the information of each self-corresponding second equivalent channel of each data Layer of the running time-frequency resource of the terminal, Including:
Detection ginseng of the base station according to the last terminal for receiving before next scheduling instance Examine signal SRS and determine the channel matrix of the running time-frequency resource, and determine the running time-frequency resource of the terminal Each self-corresponding precoding vector of each data Layer, each data of the running time-frequency resource according to the terminal The respective precoding vector of layer and the channel matrix determine each data Layer of the running time-frequency resource respectively The information of each self-corresponding second equivalent channel;
Or,
Detection ginseng of the base station according to the last terminal for receiving before next scheduling instance Examine signal SRS and determine the channel matrix of the running time-frequency resource, and determine the running time-frequency resource of the terminal Each self-corresponding figuration vector of each data Layer, each data Layer of the running time-frequency resource according to the terminal Respective figuration is vectorial and the channel matrix determines each data Layer of the running time-frequency resource each respectively The information of corresponding second equivalent channel.
4. the method for claim 1, it is characterised in that institute of the base station according to the terminal State the information of the first equivalent channel, the running time-frequency resource each data Layer each self-corresponding described second it is equivalent The information of channel and the CQI, determine each of the running time-frequency resource of terminal described in next scheduling instance Each self-corresponding first Signal to Interference plus Noise Ratio SINR of data Layer, including:
The base station determines that the corresponding CQI of the CQI report the running time-frequency resource of terminal described in the moment Second SINR value of the corresponding data Layer of the first DMRS;
The base station is directed to each data Layer of the running time-frequency resource of terminal described in next scheduling instance respectively, Calculate the gain of information and the information of first equivalent channel of the second equivalent channel of the data Layer, root Gain according to gained determines the data Layer corresponding described first with the product of second SINR value SINR value.
5. method as claimed in claim 4, it is characterised in that the base station is directed to next scheduling respectively Each data Layer of the running time-frequency resource of terminal described in the moment, calculates the second equivalent channel of the data Layer Information and the information of first equivalent channel gain, gain and the 2nd SINR according to gained The product of value determines corresponding first SINR value of the data Layer, including:
The base station is directed to each data Layer of the running time-frequency resource of terminal described in next scheduling instance respectively, Calculate the ratio of power and the power of first equivalent channel of the second equivalent channel of the data Layer, root Ratio according to gained determines the data Layer corresponding described first with the product of second SINR value SINR value.
6. the method as described in claim any one of 1-5 a, it is characterised in that DMRS is The DMRS transmitted by default DMRS port.
7. method as claimed in claim 6, it is characterised in that the default DMRS port is institute State the DMRS port that base station is made an appointment with the terminal.
8. a kind of channel quality indicator (CQI) method of estimation, it is characterised in that including:
Terminal determines the information of equivalent channel according to the demodulated reference signal DMRS for receiving;
The terminal reports the CQI that the moment reports estimation to obtain to base station in channel quality indicator (CQI), described The DMRS that CQI is received when being interference noise and the scheduled the last time according to measurement determines The information of equivalent channel is estimated to obtain.
9. method as claimed in claim 8, it is characterised in that received when described the last scheduled The DMRS, be the DMRS received by default DMRS port.
10. method as claimed in claim 9, it is characterised in that the default DMRS port is The DMRS port that the terminal is made an appointment with the base station.
A kind of 11. base stations, it is characterised in that including:
First processing module, for determining that the corresponding time-frequency of the terminal that terminal the last time reports is provided The channel quality indicator (CQI) in source, the CQI is reported measured before the moment dry by the terminal according to CQI Disturb the corresponding equivalent letters of the first demodulated reference signal DMRS received when noise and scheduled the last time The information in road is estimated to obtain, wherein, a DMRS is to calculate the DMRS that the CQI is used;
Second processing module, for determine the terminal a DMRS delivery time described in when The information of the first equivalent channel of data Layer corresponding with a DMRS in frequency resource;
3rd processing module, in next scheduling instance, determine the terminal the running time-frequency resource it is every The information of individual each self-corresponding second equivalent channel of data Layer;
Fourth processing module, for information, the time-frequency of first equivalent channel according to the terminal The information and the CQI of each self-corresponding second equivalent channel of each data Layer of resource, it is determined that under Each self-corresponding first Signal to Interference plus Noise Ratio of each data Layer of the running time-frequency resource of terminal described in one scheduling instance SINR。
12. base stations as claimed in claim 11, it is characterised in that the Second processing module is specifically used In:
According to the last terminal for receiving before a DMRS delivery times of the terminal Detection reference signal SRS determine the channel matrix of the running time-frequency resource, and determine described the of the terminal The corresponding data Layers of a DMRS are used in the running time-frequency resource described in the delivery time of one DMRS Precoding vector, first equivalent channel is determined according to the channel matrix and the precoding vector Information;Or,
According to the last terminal for receiving before a DMRS delivery times of the terminal Detection reference signal SRS determine the channel matrix of the running time-frequency resource, and determine described the of the terminal The corresponding data Layers of a DMRS are used in the running time-frequency resource described in the delivery time of one DMRS Figuration vector, the letter of first equivalent channel is determined according to the channel matrix and figuration vector Breath.
13. base stations as claimed in claim 11, it is characterised in that the 3rd processing module is specifically used In:
According to the detection reference signal of the last terminal for receiving before next scheduling instance SRS determines the channel matrix of the running time-frequency resource, and determines every number of the running time-frequency resource of the terminal According to each self-corresponding precoding vector of layer, each data Layer of the running time-frequency resource according to the terminal is each Precoding vector and the channel matrix determine that each data Layer of the running time-frequency resource is each right respectively The information of second equivalent channel answered;
Or,
According to the detection reference signal of the last terminal for receiving before next scheduling instance SRS determines the channel matrix of the running time-frequency resource, and determines every number of the running time-frequency resource of the terminal According to each self-corresponding figuration vector of layer, each data Layer of the running time-frequency resource according to the terminal is respective Figuration is vectorial and the channel matrix determines that each data Layer of the running time-frequency resource is each self-corresponding respectively The information of second equivalent channel.
14. base stations as claimed in claim 11, it is characterised in that the fourth processing module is specifically used In:
Determine that the corresponding CQI of the CQI report described the first of the running time-frequency resource of terminal described in the moment Second SINR value of the corresponding data Layers of DMRS;
Each data Layer of the running time-frequency resource of terminal described in next scheduling instance is directed to respectively, calculates described The gain of the information of the second equivalent channel of data Layer and the information of first equivalent channel, according to gained Gain and the product of second SINR value determine corresponding first SINR value of the data Layer.
15. base stations as claimed in claim 14, it is characterised in that the fourth processing module is specifically used In:
Each data Layer of the running time-frequency resource of terminal described in next scheduling instance is directed to respectively, calculates described The ratio of the power of the second equivalent channel of data Layer and the power of first equivalent channel, according to gained Ratio and the product of second SINR value determine corresponding first SINR value of the data Layer.
16. base station as described in claim any one of 11-15 a, it is characterised in that DMRS It is the DMRS transmitted by default DMRS port.
17. base stations as claimed in claim 16, it is characterised in that the default DMRS port is The DMRS port that the base station is made an appointment with the terminal.
A kind of 18. terminals, it is characterised in that including:
Processing module, the information for determining equivalent channel according to the demodulated reference signal DMRS for receiving;
Reporting module, for reporting the moment to report what estimation was obtained to base station in channel quality indicator (CQI) Described in CQI, the CQI are received when being interference noise and the scheduled the last time according to measurement The information of the equivalent channel that DMRS determines is estimated to obtain.
19. terminals as claimed in claim 18, it is characterised in that connect when described the last scheduled The DMRS for receiving, is the DMRS received by default DMRS port.
20. terminals as claimed in claim 19, it is characterised in that the default DMRS port is The DMRS port that the terminal is made an appointment with the base station.
CN201510918267.3A 2015-12-10 2015-12-10 CQI estimates, SINR determines method and relevant device CN106888062A (en)

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