CN104734805A - Wave beam quality information feedback method and system - Google Patents

Abstract

The invention provides a wave beam quality information feedback method and system, and relates to the field of communications. The problem that a signaling report mechanism is lacked in wave beam training is solved. The method comprises the steps that a terminal selectively receives training pilot frequency signals sent by a base station, and receiving processing is carried out on the training pilot frequency signals; the terminal generates judgment result indication information according to the training pilot frequency signals, and the judgment result indication information is sent to the base station to indicate the base station to continue to carry out iteration or not. According to the technical scheme, the method and system are suitable for 4G networks, and the wave beam training process is controlled by the terminal.

Description

Beam quality information feedback method and system

Technical field

The present invention relates to the communications field, particularly relate to a kind of beam quality information feedback method and system.

Background technology

In wireless communication system, transmitting terminal and receiving terminal take the mode of spatial reuse to use many antennas to obtain higher speed.Relative to general method for spacial multiplex, a kind of technology be widely used be receiving terminal feedback channel information to transmitting terminal, transmitting terminal according to obtain channel information use some launch precoding techniques, improve transmission performance greatly.For in single user multiple-input and multiple-output (Multi-inputMulti-output, MIMO), channel characteristics Vector Message is directly used to carry out precoding; For in multiuser MIMO, need channel information more accurately.

In some technology of 4G as in LTE, 802.16m standard criterion, the feedback of channel information mainly utilizes the feedback method of better simply single code book, and the performance of the transmitting precoding technique of MIMO more depends on the accuracy of wherein code book feedback.Here the general principle channel information based on code book being quantized feedback is briefly described below:

Suppose that Limited Feedback channel capacity is Bbps/Hz, so can the number of code word be N=2 ^bindividual.The space of feature vectors of channel matrix is through quantizing to form codebook space this code book (sending and receiving end is identical) is preserved or produced in real time to transmitting terminal and receiving terminal jointly.According to receiving terminal obtain channel matrix H, receiving terminal according to certain criterion from middle selection code word of mating most with channel and code word sequence number i is fed back to transmitting terminal.Here, code word sequence is known as PMI(Precoding Matrix Indicator, precoding matrix indicators).Transmitting terminal finds corresponding pre-encoding codeword according to this sequence number i thus acquisition channel information, illustrate the characteristic vector information of channel.

Along with the high speed development of wireless communication technology, user radio application is more and more abundanter, wireless data service has been driven to increase rapidly, it is predicted, between coming 10 years, data service increases with annual 1.6-2 times speed. and this brings huge challenge to Radio Access Network. and multi-antenna technology is the key technology of reply wireless data service explosive growth challenge, the multi-antenna technology supported in current 4G only supports the horizontal dimensions beamforming technique of maximum 8 ports, also has the further significantly capacity of larger potentiality.

Massive MIMO technology is the crucial enhancing technology of in next generation communication technology, Massive mimo system principal character is: base station side is configured with large-scale antenna array, such as 100 antennas, even more, when transfer of data, utilize MU-MIMO technology, simultaneously with the multiplexing multiple user of frequency, in general, number of antennas and users multiplexing number scale dimension are held in 5-10 doubly left and right.Can prove, it is no matter the strong correlation channel at view distance environment, or the non-correlation channel under rich scattering, coefficient correlation between the channel of any two users decays along with the increase exponentially form of number of antennas, such as when base station side is configured with 100 antennas, between the channel of any two users, coefficient correlation levels off to 0, in other words between multi-user's respective channels close to orthogonal.On the other hand, large array can bring considerable array gain and diversity gain.

For Massive MIMO, due to the introducing of a large amount of antenna, traditional method: every root antenna transmitting channel measurement pilot frequency CSI-RS, terminal detects CSI-RS and obtains channel matrix corresponding to each transfer resource by channel estimating, the best transmission number of plies information in each frequency domain sub-band precoding vectors and broadband in best base band is obtained according to channel matrix, then feed back based on the code book feedback technique introduced above, when this mode is applied in massive MIMO, there is larger problem.Be mainly reflected in, pilot-frequency expense can increase with Nt and increases, antenna number pilot-frequency expense of many times is very huge, in addition, need to comprise very many code words in code book due to use during feedback, the selection of code word is very difficult, and the complexity causing terminal a large amount of increases, almost cannot realize, or need to pay huge cost price.The expense of code book feedback is also very large, makes uplink overhead huge.Therefore in general, for massiveMIMO, better mode adopts beam shape-endowing weight value training method, effectively can reduce pilot tone and feedback overhead and make system obtain good precoding performance.

As shown in Figure 1, define and send training pilot tone by base station to terminal, the data received send to the process of base station to be called an iterative process to the general principle of wave beam training technique by terminal after treatment.After successive ignition, finishing iteration has been called a training process.Iteration schematic diagram as shown in Figure 1.

Wave beam training principles and methods:

Step 1: base station sends training pilot tone to terminal;

Step 2: terminal receives training pilot tone and carries out receiving area reason;

Step 3: terminal is to the training pilot tone after the transmission processing of base station;

Step 4: the training pilot tone that base station receiving terminal sends is gone forward side by side row relax;

Repeat step 1-4 until trained.

Formula below illustrates this wave beam and trains the beneficial effect that can bring:

$H={\mathrm{\σ}}_1{u}_1{v}_1^H+{\mathrm{\σ}}_2{u}_2{v}_2^H+\·\·\·{\mathrm{\σ}}_p{u}_p{v}_p^H---\left(1\right)$

Here σ ₁σ _pbe singular value, u1-up is left characteristic vector, and v1-vp is right characteristic vector.

Definition

Can find: $\underset{m\→\∞}{\lim }{H}^{2m}={\mathrm{\δ}}_1^{2m}{v}_1{v}_1^H$ (projection matrix form), $\underset{m\→\∞}{\lim }{H}^{2m+1}={\mathrm{\δ}}_1^{2m+1}{u}_1{v}_1^H$

Generally think and work as can think above-mentioned effect can be reached by iteration for several times.After successive ignition, precoding vectors can well match with channel eigenvectors, thus makes terminal obtain precoding more accurately, improves the signal to noise ratio of system.

In prior art, wave beam forming training method is affected by noise larger, if when each training starts, and initial t ⁰for the vector of any Ntx1, because p (p=Nt) individual characteristic vector is one group of base of Nt dimension space, therefore necessarily can by t ⁰be expressed as consider conclusion above $H^{2m+1}\≈{\mathrm{\δ}}_1^{2m+1}{v}_1{v}_1^H$

So have

$H^{2m}{t}^0={\mathrm{\σ}}_1^{2m}{c}_1{v}_1---\left(4\right)$

$H^{2m+1}{t}^0={\mathrm{\σ}}_1^{2m+1}{c}_1{u}_1---\left(5\right)$

It is normalized and can obtains characteristic vector, and this characteristic vector still can through different iteration after obtaining.The mechanism that beam shape-endowing weight value training method of the prior art is imperfect, for this training algorithm, suitable iterations is selected most important for the program, if iterations is selected improper, such as iterations is too much, not only can cause the waste of resource, and the training time can be made elongated, the iterative information of feedback will lose efficacy; And the training time too shortly may cause current signal quality to be not enough to transfer of data, or better performance can be obtained after more times training, improve the transmittability of whole system.And support that perfect iterations selects mechanism be the signaling of terminal to base station feedback, only have the suitable and accurate of signaling feedback, base station and terminal just can better complete training.

In signaling feedback, one important is fed back to CQI feedback, CQI(Channel Quality Indicator, channel quality indicates) be the important component part of CSI information, by the CQI information of terminal to report, current channel conditions can be understood in base station, and determines to adopt which kind of transmission means and modulation coding mode to transmit.In wave beam training algorithm, the CQI information that terminal reports to base station is also very crucial, according to this information, base station according to current C QI information inspection when time training, and can determine that training is the need of continuation, therefore select the signaling reporting schemes such as suitable CQI very necessary to wave beam training.

Summary of the invention

The invention provides a kind of beam quality information feedback method and system, solve and lack the problem that signaling reports mechanism in wave beam training.

A kind of beam quality information feedback method, comprising:

Terminal selects the training pilot signal receiving base station transmission, and carries out reception process to described training pilot signal;

Described terminal generates judged result indication information according to described training pilot signal, and this judged result indication information is sent to described base station, indicates described base station whether to proceed iteration.

Preferably, described terminal comprises according to described training pilot signal generation judged result indication information:

Whether described terminal judges whether to proceed iteration and this time train successful according to described training pilot signal;

Described terminal generates the described judged result indication information comprising and whether proceed iteration and this time training whether successful relevant information.

Preferably, described judged result indication information comprises and whether continues iteration and train whether Success Flag position, the described iteration and train whether Success Flag position at least comprises three kinds of mode bits of whether continuing, iteration is proceeded after the first mode bit in described three kinds of mode bits indicates this iteration, the second mode bit in described three kinds of mode bits indicates finishing iteration after this iteration and failure to train, finishing iteration after the third state position in described three kinds of mode bits indicates this iteration and training successfully.

Preferably, described terminal comprises according to described training pilot signal generation judged result indication information:

Described terminal judges whether to proceed iteration according to described training pilot signal, generates the judged result indication information comprising this judged result.

Preferably, described judged result indication information is by whether finishing iteration flag bit carries judged result;

It is described that whether finishing iteration flag bit comprises following two states position:

After first mode bit represents this iteration, iteration terminates,

Second mode bit continues iteration after representing this iteration.

Preferably, the method also comprises:

According to described training pilot signal, described terminal judges that whether this training is successful, and whether successful for judgement this time training result is sent to described base station.

Preferably, by sending, described terminal this time trains whether whether successfully Success Flag position sends judgement this time training result to described base station;

Describedly this time train whether Success Flag position comprises following two states position:

First mode bit represents this time trains successfully,

Second mode bit represents this failure to train.

Preferably, the method also comprises:

When described whether continue iteration and train whether Success Flag position to indicate this iteration after iteration terminate and train successfully time, terminal to report CQI information.

Preferably, terminal to report CQI information is specially:

Described terminal is combined and is reported CQI information while the described judged result indication information of transmission.

Preferably, described CQI information is differential CQI information.

Preferably, described differential CQI information is concrete differential CQl values.

Preferably, described differential CQI information is differential CQI grade point.

Preferably, the method also comprises:

The configuration information that described terminal sends according to described base station, reports differential CQI information to described base station.

Preferably, described configuration information is concrete differential CQl values or differential CQI class information.

Preferably, the method also comprises:

Described terminal receives the rating information that described base station sends, and includes the division to CQI information different brackets in described rating information;

The CQI class information of rating information configuration described in described terminal configuration oneself.

Preferably, the method also comprises:

CQI information is divided into different grades by described terminal, and relevant rating information is fed back to described base station.

Present invention also offers a kind of beam quality information feedback method, comprising:

Base station sends training pilot signal to terminal;

Described base station receives the judged result indication information that described terminal returns according to described training pilot signal, in described judged result written instructions information, indicate described base station whether to proceed iteration;

Described base station judges whether to proceed iteration according to described judged result indication information.

Preferably, the method also comprises:

Described base station is configured differential CQI mode and generates configuration information, and described configuration information is sent to described terminal.

Preferably, the method also comprises:

The thresholding of base station to terminal to report differential CQI is configured, and configuration information is sent to terminal.

Preferably, the method also comprises:

CQI information is divided into different grades by described base station, and the rating information of the different brackets relevant information comprising division is informed to described terminal.

Preferably, the method also comprises:

The rating information that base station receiving terminal returns, carries the relevant information that CQI information is divided into different grades by terminal in described rating information.

Present invention also offers a kind of beam quality information reponse system, comprise base station and terminal:

Described base station, for sending training pilot signal to described terminal, receive the judged result indication information that described terminal returns according to described training pilot signal, in described judged result written instructions information, indicate described base station whether to proceed iteration, judge whether to proceed iteration according to described judged result indication information;

Described terminal, for selecting the training pilot signal receiving base station transmission, and reception process is carried out to described training pilot signal, judged result indication information is generated according to described training pilot signal, and this judged result indication information is sent to described base station, indicate described base station whether to proceed iteration.

The invention provides a kind of beam quality information feedback method and system, base station sends training pilot signal to described terminal, receive the judged result indication information that described terminal returns according to described training pilot signal, in described judged result written instructions information, indicate described base station whether to proceed iteration, judge whether to proceed iteration according to described judged result indication information; Terminal selects the training pilot signal receiving base station transmission, and reception process is carried out to described training pilot signal, generate judged result indication information according to described training pilot signal, and this judged result indication information is sent to described base station, indicate described base station whether to proceed iteration.Achieve the control of terminal to wave beam training process, solve and lack the problem that signaling reports mechanism in wave beam training.

Accompanying drawing explanation

Fig. 1 is the flow chart of a kind of beam quality information feedback method that embodiments of the invention one provide;

Fig. 2 is the flow chart of a kind of beam quality information feedback method that embodiments of the invention one provide;

Fig. 3 is the flow chart of a kind of beam quality information feedback method that embodiments of the invention three provide;

Fig. 4 is the flow chart of a kind of beam quality information feedback method that embodiments of the invention four provide.

Embodiment

Hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.

Be defined in same once training, adjacent twice iteration such as signal quality ratio between i-th time and the i-th-1 time iteration is λ _i, i be greater than 1 positive integer.Described signal quality includes but not limited to signal to noise ratio, believes dry ripple of making an uproar, and carries dry ratio of making an uproar, and represents with R.

λ _i=R _i/R _i-1

Embodiment one:

Present embodiments provide a kind of beam quality information feedback method, Fig. 2 is the first pass figure of the beam quality information feedback method according to the embodiment of the present invention, and the method comprises:

Step 201: terminal obtains the signal condition information of this time training.

Step 202: whether terminal calculates the need of continuation iteration, this time training successful, and forms the feedback report of at least 2bit.

Step 203: terminal is fed back on feedback report physically row control channel or Physical Uplink Shared Channel.

Below the concrete operations flow process of each step is described in detail.Concrete operation step is as follows:

(1) base station is terminal configuration maximum iteration time, and concrete operations are:

(1.1) base station sends maximum iteration time N information to terminal on down control channel, the maximum iteration time N information sent can be directly times N, or for representing the flag bit of N grade, base station can according to terminal channel environment or out of Memory, for different terminals configures identical or different maximum iteration time, identical or different maximum iteration time can not configured in the same time for same terminal yet; Maximum iteration time N grade mark position can be expressed as form as shown in table 1.

Table 1

Grade Index	Iterations
		0	5
1	10
		2	15
3	Retain

(1.2) terminal obtains maximum iteration time information on down control channel, and configures the maximum iteration time of self.

(2) base station is that terminal configuration terminates to train criterion in advance, and concrete operations are:

(2.1) base station sends to terminal and terminates training judgment criterion information in advance on down control channel, and the judgment criterion of transmission can be signal quality threshold information, or is λ _ithresholding δ information; Described thresholding δ information can be concrete δ value, or δ grade;

(2.2) terminal obtains to terminate in advance to train and judges threshold information information on down control channel, and is configured the thresholding of self.

(3) base station is at N _beamin individual OFDM symbol, continuous or discontinuous transmission to terminal in the pilot frequency locations of agreement trains pilot signal, N _beamfor positive integer; Base station send OFDM symbol can for the cycle send or aperiodic transmission;

(4) terminal is selected at N _beamthe training pilot signal that base station sends is received in individual OFDM symbol, the line item and the signal quality information calculating corresponding Received signal strength is gone forward side by side, signal quality information can be received power, also can be received signal to noise ratio, receive Signal to Interference plus Noise Ratio, receive carry dry make an uproar than etc., wherein, signal quality information corresponding to i-th OFDM symbol is CQI _i, i=1 ..., N _beam;

(5) terminal obtains the number of times m when time iteration; Terminal can obtain when secondary iterations by the pilot frequency locations of agreement;

(6) iterations m and maximum iteration time N contrasts by terminal, if m equals N, then on ascending control channel or data channel to base station feedback finishing iteration, training completes; If m is less than N, then enter into step (7);

(7) terminal judges whether finishing iteration in advance by the channel quality information of record, if can shift to an earlier date finishing iteration, then terminal terminates to base station feedback iteration; If need to continue training, then terminal terminates to base station feedback training; Terminal can judge whether to need finishing iteration in advance according to current C QI grade, also can judge whether finishing iteration in advance by CQI change of rank.

If terminal judges iteration continues, step of directly entering (9); If terminal judges iteration terminates, enter step (8).

(8) according to thresholding, terminal judges that whether this time training be successful:

Terminal is by the signal quality of last iteration and signal quality thresholding SNR ₀contrast, when signal quality is greater than or equal to SNR ₀time, train successfully, if signal quality is less than SNR ₀time, failure to train; Or, when signal quality is greater than SNR ₀time, train successfully, if signal quality is equal to or less than SNR ₀time, failure to train.

(9) whether terminal will continue iteration, train the report reporting whether successful combination is encoded to 2bits, and described report at least comprises 3 mode bits, as shown in table 2.

Table 2

Terminal presses current iteration situation, selects a mode bit to report, and continues, then select index 0 to report as terminal calculates iteration; If iteration terminates and trains successfully after terminal calculates this iteration, then index is selected 1 to report; If iteration terminates and failure to train after terminal calculates this iteration, then index is selected 2 to report.

(10) the training signal normalization that will receive of terminal, obtains Y ₁, at N _beam2in individual OFDM symbol, the continuous or discontinuous pilot frequency locations arranging sends normalized Received signal strength Y to base station ₁;

(11) base station selected at N _beam2the training pilot signal that in individual OFDM symbol, receiving terminal sends;

(12) base station selected receiving terminal feedback whether continuation iteration with train whether Success Flag position, determine whether proceed iteration by flag bit feedback information; If proceed iteration, then will receive the normalization of training pilot frequency information and obtain Y ₂, Y ₂for new training pilot tone.

Repeat step (3)-(12), until step (6) or (7) middle base station receive terminal feedback finishing iteration.

Embodiment two:

Whether terminal reports training successful respectively to base station, whether iteration continues, and concrete operation step is as follows:

(1) base station is terminal configuration maximum iteration time;

(1.1) base station sends maximum iteration time N information to terminal on down control channel, the maximum iteration time N information sent can be directly times N, or for representing the flag bit of N grade, base station can according to terminal channel environment or out of Memory, for different terminals configures identical or different maximum iteration time, identical or different maximum iteration time can not configured in the same time for same terminal yet;

(1.2) terminal obtains maximum iteration time information on down control channel, and passes through the maximum iteration time of this information configuration self;

(2) base station is that terminal configuration terminates to train criterion in advance:

(2.1) base station sends to terminal and terminates training judgment criterion information in advance on down control channel, and the judgment criterion of transmission includes but not limited to signal quality threshold information R, or is λ _ithresholding δ information; Described thresholding δ information can be concrete δ value, or δ grade;

(2.2) terminal obtains to terminate in advance to train and judges threshold information information on down control channel, and is configured according to the thresholding of described information to self.

(3) base station is at N _beamin individual OFDM symbol, continuous or discontinuous transmission to terminal in the pilot frequency locations of agreement trains pilot signal, N _beamfor positive integer; Base station send OFDM symbol can for the cycle send or aperiodic transmission;

(4) terminal is selected at N _beamthe training pilot signal that base station sends is received in individual OFDM symbol, the line item and the signal quality information calculating corresponding Received signal strength is gone forward side by side, signal quality information can be received power, also can be received signal to noise ratio, receive Signal to Interference plus Noise Ratio, receive carry dry make an uproar than etc., wherein, signal quality information corresponding to i-th OFDM symbol is CQI _i, i=1 ..., N _beam; (5) terminal obtains the number of times m when time iteration; Terminal can obtain when secondary iterations by the pilot frequency locations of agreement;

(6) iterations m and maximum iteration time N contrasts by terminal, if m equals N, then on ascending control channel or data channel to base station feedback finishing iteration, training completes; If m is less than N, then enter into step (7);

(7) terminal judges whether finishing iteration in advance by the channel quality information of record, if can shift to an earlier date finishing iteration, then terminal terminates to base station feedback iteration; If need to continue training, then terminal terminates to base station feedback training; Terminal can judge whether to need finishing iteration in advance according to current C QI grade, also can judge whether finishing iteration in advance by CQI change of rank situation.

If terminal judges iteration continues, step of directly entering (9); If terminal judges iteration terminates, enter step (8)

(8) according to thresholding, terminal judges that whether this time training be successful:

Terminal is by the signal quality of last iteration and signal quality thresholding SNR ₀contrast, when signal quality is greater than or equal to SNR ₀time, train successfully, if signal quality is less than SNR ₀time, failure to train; Or, when signal quality is greater than SNR ₀time, train successfully, if signal quality is equal to or less than SNR ₀time, failure to train;

(9) whether terminal will continue iteration flag bit and report base station, as shown in table 3.

Table 3

Iteration is continued after reporting Index1=0 to represent this iteration; Index1=1 is reported to represent finishing iteration after this iteration;

Only have after terminal judges iteration terminates, just train whether Success Flag position reports to base station working, as shown in table 4.

Table 4

Index2	Whether training is successful
		0	Train successfully
1	Failure to train

Terminal presses current iteration situation, selects a mode bit to report, and as the success of terminal calculation training, then selects Index2 0 to report; If terminal calculates this failure to train, then index is selected 1 to report.(10) the training signal normalization that will receive of terminal, obtains Y ₁, at N _beam2in individual OFDM symbol, the continuous or discontinuous pilot frequency locations arranging sends normalized Received signal strength Y to base station ₁;

(11) base station selected at N _beam2the training pilot signal that in individual OFDM symbol, receiving terminal sends;

(12) the whether continuation iteration flag bit of base station selected receiving terminal feedback, determines whether proceed iteration by flag bit feedback information; If proceed iteration, then will receive the normalization of training pilot frequency information and obtain Y ₂, Y ₂for new training pilot tone; Base station selected receiving terminal feedback training whether Success Flag position, determines this training whether success.

Repeat step (3)-(12), until step (6) or (7) middle base station receive terminal feedback finishing iteration.

Embodiment three:

Fig. 3 is the first pass figure of the channel feedback method according to the embodiment of the present invention, and as shown in Figure 3, the method comprises:

Step 301: terminal obtains the signal condition information of this time training.

Step 302: whether terminal calculates the need of continuation iteration, this time training successful, and forms the feedback report of 5bit together with CQI.

Step 303: terminal is fed back on feedback report physically row control channel or Physical Uplink Shared Channel.

This step gives a kind of training end mark, and can determine whether after making base station receive feedback information proceed training or whether carry out transfer of data, and obtain current system CQI value, concrete implementation process is:

(1) as shown in embodiment one, base station is terminal configuration maximum iteration time;

(2) as shown in embodiment one, base station is that terminal configuration terminates to train criterion in advance;

(3) base station is at N _beamin individual OFDM symbol, continuous or discontinuous transmission to terminal in the pilot frequency locations of agreement trains pilot signal, N _beamfor positive integer; Base station send OFDM symbol can for the cycle send or aperiodic transmission;

(4) terminal is selected at N _beamthe training pilot signal that base station sends is received in individual OFDM symbol, the line item and the signal quality information calculating corresponding Received signal strength is gone forward side by side, signal quality information can be received power, also can be received signal to noise ratio, receive Signal to Interference plus Noise Ratio, receive carry dry make an uproar than etc., wherein, signal quality information corresponding to i-th OFDM symbol is CQI _i, i=1 ..., N _beam;

(5) terminal obtains the number of times m when time iteration; Terminal can obtain when secondary iterations by the pilot frequency locations of agreement;

(6) iterations m and maximum iteration time N contrasts by terminal, if m equals N, then on ascending control channel or data channel to base station feedback finishing iteration, training completes; If m is less than N, then enter into step (7);

(7) terminal judges whether finishing iteration in advance by the channel quality information of record, if can shift to an earlier date finishing iteration, then terminal terminates to base station feedback iteration; If need to continue training, then terminal terminates to base station feedback training;

If terminal judges iteration continues, step of directly entering (9); If terminal judges iteration terminates, enter step (8)

(8) according to thresholding, terminal judges that whether this time training be successful, and determination methods is as shown in embodiment 4-1 step (8).

(9) terminal will the need of continuation iteration, this time train whether success and CQI to carry out combined coding, and the feedback report obtaining 5bit feeds back, after described 5bit feedback report is used to indicate this iteration, whether whether iteration continue and train successful, and CQI value .5bits feedback report when training successfully is as shown in table 5.

Table 5

(10) the training signal normalization that will receive of terminal, obtains Y ₁, at N _beam2in individual OFDM symbol, the continuous or discontinuous pilot frequency locations arranging sends normalized Received signal strength Y to base station ₁;

(11) base station selected at N _beam2the training pilot signal that in individual OFDM symbol, receiving terminal sends;

(12) by report, the feedback report of base station selected receiving terminal feedback, determines whether iteration continues, and whether training is successful;

(13) if proceed iteration, then will receive the normalization of training pilot frequency information and obtain Y ₂, Y ₂for new training pilot tone;

Repeat step (3)-(13), until step (6) or (7) middle base station receive terminal feedback finishing iteration.

Embodiment four:

Fig. 4 is the first pass figure of the channel feedback method according to the embodiment of the present invention, and the method comprises:

Step 401: terminal obtains the SNR information of this time training.

Step 402: whether terminal calculates the need of continuation iteration, this time training successful, and forms the feedback report of 6bit together with CQI.

Step 403: terminal is fed back on feedback report physically row control channel or Physical Uplink Shared Channel.

In the embodiment of the present invention, the 5bits report of terminal to report can be 6bits, and concrete combined coding mode is as shown in table 6.

Table 6

Will the need of continuation iteration, this time train whether success and CQI to carry out combined coding, and the feedback report obtaining 6bit feeds back, this step gives a kind of training end mark, can determine whether after making base station receive feedback information proceed training or whether carry out transfer of data, and obtain current system CQI value.After above-mentioned 6bit feedback report is used to indicate this iteration, whether whether iteration continue and train successful, CQI value when training successfully. and specific operation process is:

(1) as shown in embodiment one, base station is terminal configuration maximum iteration time;

(2) as shown in embodiment one, base station is that terminal configuration terminates to train criterion in advance;

(3) base station is at N _beamin individual OFDM symbol, continuous or discontinuous transmission to terminal in the pilot frequency locations of agreement trains pilot signal, N _beamfor positive integer; Base station send OFDM symbol can for the cycle send or aperiodic transmission;

(4) terminal is selected at N _beamthe training pilot signal that base station sends is received in individual OFDM symbol, the line item and the signal quality information calculating corresponding Received signal strength is gone forward side by side, signal quality information can be received power, also can be received signal to noise ratio, receive Signal to Interference plus Noise Ratio, receive carry dry make an uproar than etc., wherein, signal quality information corresponding to i-th OFDM symbol is CQI _i, i=1 ..., N _beam;

(5) terminal obtains the number of times m when time iteration; Terminal can obtain when secondary iterations by the pilot frequency locations of agreement;

(6) iterations m and maximum iteration time N contrasts by terminal, if m equals N, then on ascending control channel or data channel to base station feedback finishing iteration, training completes; If m is less than N, then enter into step (7);

(7) terminal judges whether finishing iteration in advance by the channel quality information of record, if can shift to an earlier date finishing iteration, then terminal terminates to base station feedback iteration; If need to continue training, then terminal terminates to base station feedback training;

If terminal judges iteration continues, step of directly entering (9); If terminal judges iteration terminates, enter step (8)

(8) as described in embodiment one, according to thresholding, terminal judges that whether this training be successful;

(9) terminal will the need of continuation iteration, this time train whether success and CQI to carry out combined coding, and the feedback report obtaining 6bit feeds back, after described 6bit feedback report is used to indicate this iteration, whether whether iteration continue and train successful, CQI value when training successfully.

(10) the training signal normalization that will receive of terminal, obtains Y ₁, at N _beam2in individual OFDM symbol, the continuous or discontinuous pilot frequency locations arranging sends normalized Received signal strength Y to base station ₁;

(11) base station selected at N _beam2the training pilot signal that in individual OFDM symbol, receiving terminal sends;

(12) by report, the feedback report of base station selected receiving terminal feedback, determines whether iteration continues, and whether training is successful;

(13) if proceed iteration, then will receive the normalization of training pilot frequency information and obtain Y ₂, Y ₂for new training pilot tone;

Repeat step (3)-(13), until step (6) or (7) middle base station receive terminal feedback finishing iteration.

Embodiment five:

In each iteration, the channel quality information that terminal reports to base station can be the CQI information of difference, and specific operation process is:

(1) base station is terminal configuration maximum iteration time, and concrete operation step is:

(1.1) base station sends maximum iteration time N information to terminal on down control channel, the maximum iteration time N information sent can be directly times N, or for representing the flag bit of N grade, base station can according to terminal channel environment or out of Memory, for different terminals configures identical or different maximum iteration time, identical or different maximum iteration time can not configured in the same time for same terminal yet;

(1.2) terminal obtains maximum iteration time information on down control channel, and passes through the maximum iteration time of this information configuration self;

(2) base station is that terminal configuration terminates to train criterion in advance:

(2.1) base station sends to terminal and terminates training judgment criterion information in advance on down control channel, and the judgment criterion of transmission includes but not limited to signal quality threshold information R, or is λ _ithresholding δ information; Described thresholding δ information can be concrete δ value, or δ grade;

(2.2) terminal obtains to terminate in advance to train and judges threshold information on down control channel, and is configured according to the thresholding of described information to self

(3) base station is at N _beamin individual OFDM symbol, continuous or discontinuous transmission to terminal in the pilot frequency locations of agreement trains pilot signal, N _beamfor positive integer; Base station send OFDM symbol can for the cycle send or aperiodic transmission;

(4) terminal is selected at N _beamthe training pilot signal that base station sends is received in individual OFDM symbol, the line item and the signal quality information calculating corresponding Received signal strength is gone forward side by side, channel quality information can be received power, also can be received signal to noise ratio, receive Signal to Interference plus Noise Ratio, receive carry dry make an uproar than etc., wherein, channel quality information corresponding to i-th OFDM symbol is CQI _i, i=1 ..., N _beam;

(5) terminal is according to the signal quality information CQI of adjacent twice iteration _i-1, CQI _icalculate the differential CQl values Δ that this time reports; If this iteration is the iteration first in training, then directly report true CQI information;

Δ＝CQI _i-CQI _i-1

(6) terminal obtains the number of times m when time iteration; Terminal can obtain when secondary iterations by the pilot frequency locations of agreement;

(7) iterations m and maximum iteration time N contrasts by terminal, if m equals N, then on ascending control channel or data channel to base station feedback finishing iteration, training completes; If m is less than N, then enter into step (8);

(8) whether terminal is terminated in advance by pre-conditioned judgement this iteration, and terminal judges whether finishing iteration in advance by the channel quality information of record, if can shift to an earlier date finishing iteration, then terminal terminates to base station feedback iteration; If need to continue training, then terminal terminates to base station feedback training; Terminal can judge whether to need finishing iteration in advance according to current C QI grade, also can judge whether finishing iteration in advance by CQI change of rank situation.

(9) if shift to an earlier date finishing iteration, then terminal terminates to base station feedback iteration; If need to continue training, then terminal terminates to base station feedback training; If terminal judges iteration terminates, then judge that whether this training be successful:

Terminal is by the signal quality of last iteration and signal quality thresholding SNR ₀contrast, when signal quality is greater than or equal to SNR ₀time, train successfully, if signal quality is less than SNR ₀time, failure to train; Or, when signal quality is greater than SNR ₀time, train successfully, if signal quality is equal to or less than SNR ₀time, failure to train.

(10) the training signal normalization that will receive of terminal, obtains Y ₁, at N _beam2in individual OFDM symbol, the continuous or discontinuous pilot frequency locations arranging sends normalized Received signal strength Y to base station ₁;

(11) terminal is to base station feedback channel condition information, comprising the CQI information of difference;

(12) base station selected at N _beam2the training pilot signal that in individual OFDM symbol, receiving terminal sends;

(13) the whether continuation iteration flag bit of base station selected receiving terminal feedback, determines whether proceed iteration by flag bit feedback information; If proceed iteration, then will receive the normalization of training pilot frequency information and obtain Y ₂, Y ₂for new training pilot tone;

(14) channel condition information of base station selected receiving terminal feedback, and the CQI information being calculated this iteration by the CQI value of differential CQI information and last iteration.Specific operation process is:

(14.1) in iteration first, the CQI information that base station receives is actual CQI value; The CQI information that base station reading terminals reports;

(14.2) in second time and later iteration, the CQI information that base station receives is differential CQI information, after base station receives this CQI information with last iteration after the CQI that calculates _i-1be added, obtain the CQI information of this time, and record,

CQI _i＝Δ _i+CQI _i-1i≥2

Repeat step (3)-(14), until step (7) or (8) middle base station receive terminal feedback finishing iteration.

Embodiment six:

CQI information in step (5) in embodiment five can be also differential CQl values grade, and grade separation is as shown in table 7.

Table 7

Embodiment seven:

Base station is that terminal configuration maximum iteration time process is as follows:

(1) base station sends differential CQI configuration information to terminal on down control channel, the differential CQI configuration information sent can be concrete difference value, or be differential CQI class information, base station can according to terminal channel environment or out of Memory, for each terminal configuration differential CQI information, and this Informational support reprovision;

(2) terminal obtains differential CQI configuration information on down control channel, and terminal is according to the CQI information of the information configuration received self;

(3), during training, as embodiment five step (5), terminal calculates differential CQI information or its corresponding grade, and is reported base station.

The embodiment provides a kind of beam quality information feedback method and system, base station sends training pilot signal to described terminal, receive the judged result indication information that described terminal returns according to described training pilot signal, in described judged result written instructions information, indicate described base station whether to proceed iteration, judge whether to proceed iteration according to described judged result indication information; Terminal selects the training pilot signal receiving base station transmission, and reception process is carried out to described training pilot signal, generate judged result indication information according to described training pilot signal, and this judged result indication information is sent to described base station, indicate described base station whether to proceed iteration.Achieve the control of terminal to wave beam training process, solve and lack the problem that signaling reports mechanism in wave beam training.

One of ordinary skill in the art will appreciate that all or part of step of above-described embodiment can use computer program flow process to realize, described computer program can be stored in a computer-readable recording medium, described computer program (as system, unit, device etc.) on corresponding hardware platform performs, when performing, step comprising embodiment of the method one or a combination set of.

Alternatively, all or part of step of above-described embodiment also can use integrated circuit to realize, and these steps can be made into integrated circuit modules one by one respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.

Each device/functional module/functional unit in above-described embodiment can adopt general calculation element to realize, and they can concentrate on single calculation element, also can be distributed on network that multiple calculation element forms.

Each device/functional module/functional unit in above-described embodiment using the form of software function module realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.The above-mentioned computer read/write memory medium mentioned can be read-only memory, disk or CD etc.

Anyly be familiar with those skilled in the art in the technical scope that the present invention discloses, change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range described in claim.

Claims (22)

1. a beam quality information feedback method, is characterized in that, comprising:

Terminal selects the training pilot signal receiving base station transmission, and carries out reception process to described training pilot signal;

Described terminal generates judged result indication information according to described training pilot signal, and this judged result indication information is sent to described base station, indicates described base station whether to proceed iteration.

2. beam quality information feedback method according to claim 1, is characterized in that, described terminal generates judged result indication information according to described training pilot signal and comprises:

Whether described terminal judges whether to proceed iteration and this time train successful according to described training pilot signal;

Described terminal generates the described judged result indication information comprising and whether proceed iteration and this time training whether successful relevant information.

3. beam quality information feedback method according to claim 2, it is characterized in that, described judged result indication information comprises and whether continues iteration and train whether Success Flag position, the described iteration and train whether Success Flag position at least comprises three kinds of mode bits of whether continuing, iteration is proceeded after the first mode bit in described three kinds of mode bits indicates this iteration, the second mode bit in described three kinds of mode bits indicates finishing iteration after this iteration and failure to train, finishing iteration after third state position in described three kinds of mode bits indicates this iteration and training successfully.

4. beam quality feedback method according to claim 1, is characterized in that, described terminal generates judged result indication information according to described training pilot signal and comprises:

Described terminal judges whether to proceed iteration according to described training pilot signal, generates the judged result indication information comprising this judged result.

5. beam quality feedback method according to claim 4, is characterized in that, described judged result indication information is by whether finishing iteration flag bit carries judged result;

It is described that whether finishing iteration flag bit comprises following two states position:

After first mode bit represents this iteration, iteration terminates,

Second mode bit continues iteration after representing this iteration.

6. beam quality feedback method according to claim 1, it is characterized in that, the method also comprises:

According to described training pilot signal, described terminal judges that whether this training is successful, and whether successful for judgement this time training result is sent to described base station.

7. beam quality feedback method according to claim 6, is characterized in that, by sending, described terminal this time trains whether whether successfully Success Flag position sends judgement this time training result to described base station;

Describedly this time train whether Success Flag position comprises following two states position:

First mode bit represents this time trains successfully,

Second mode bit represents this failure to train.

8. beam quality information feedback method according to claim 3, it is characterized in that, the method also comprises:

When described whether continue iteration and train whether Success Flag position to indicate this iteration after iteration terminate and train successfully time, terminal to report CQI information.

9. beam quality information feedback method according to claim 8, is characterized in that, terminal to report CQI information is specially:

Described terminal is combined and is reported CQI information while the described judged result indication information of transmission.

10. beam quality information feedback method according to claim 8 or claim 9, it is characterized in that, described CQI information is differential CQI information.

11. beam quality information feedback methods according to claim 10, is characterized in that, described differential CQI information is concrete differential CQl values.

12. beam quality information feedback methods according to claim 10, is characterized in that, described differential CQI information is differential CQI grade point.

13. beam quality information feedback methods according to claim 8, it is characterized in that, the method also comprises:

The configuration information that described terminal sends according to described base station, reports differential CQI information to described base station.

14. beam quality information feedback methods according to claim 13, is characterized in that, described configuration information is concrete differential CQl values or differential CQI class information.

15. beam quality information feedback methods according to claim 8, it is characterized in that, the method also comprises:

Described terminal receives the rating information that described base station sends, and includes the division to CQI information different brackets in described rating information;

The CQI class information of rating information configuration described in described terminal configuration oneself.

16. beam quality information feedback methods according to claim 8, it is characterized in that, the method also comprises:

CQI information is divided into different grades by described terminal, and relevant rating information is fed back to described base station.

17. 1 kinds of beam quality information feedback methods, is characterized in that, comprising:

Base station sends training pilot signal to terminal;

Described base station receives the judged result indication information that described terminal returns according to described training pilot signal, in described judged result written instructions information, indicate described base station whether to proceed iteration;

Described base station judges whether to proceed iteration according to described judged result indication information.

18. beam quality information feedback methods according to claim 17, it is characterized in that, the method also comprises:

Described base station is configured differential CQI mode and generates configuration information, and described configuration information is sent to described terminal.

19. beam quality information feedback methods according to claim 17, it is characterized in that, the method also comprises:

The thresholding of base station to terminal to report differential CQI is configured, and configuration information is sent to terminal.

20. beam quality information feedback methods according to claim 17, it is characterized in that, the method also comprises:

CQI information is divided into different grades by described base station, and the rating information of the different brackets relevant information comprising division is informed to described terminal.

21. beam quality information feedback methods according to claim 17, it is characterized in that, the method also comprises:

The rating information that base station receiving terminal returns, carries the relevant information that CQI information is divided into different grades by terminal in described rating information.

22. 1 kinds of beam quality information reponse systems, is characterized in that, comprise base station and terminal:

Described base station, for sending training pilot signal to described terminal, receive the judged result indication information that described terminal returns according to described training pilot signal, in described judged result written instructions information, indicate described base station whether to proceed iteration, judge whether to proceed iteration according to described judged result indication information;

Described terminal, for selecting the training pilot signal receiving base station transmission, and reception process is carried out to described training pilot signal, judged result indication information is generated according to described training pilot signal, and this judged result indication information is sent to described base station, indicate described base station whether to proceed iteration.