CN101635593B - Method, device and system for realizing transmission of multicast broadcast service data - Google Patents
Method, device and system for realizing transmission of multicast broadcast service data Download PDFInfo
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Abstract
The invention relates to a method, a device and a system for realizing the transmission of multicast broadcast service data. The method comprises the following steps: selecting an optimal wave beam mode by training protocol; adopting a wave beam forming technique without time diversity or with time diversity carried to transmit the multicast broadcast service data. Therefore, the transmission of the multicast broadcast service data is realized simply and fast, and performance gain of the base station can be increased and the coverage area of the base station can be improved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method, system and device of realizing the multicast broadcast service data transmission.
Background technology
In Multimedia Broadcast Multicast Service (MBS) radio transmission technical field, beam forming technique (beamforming) can be used in and be used for improving the signal quality that receives in the transmitter.And, can carry out the complex weighting computing by the signal to transmission antenna unit and obtain the beam modes that transmitting power focuses on a certain specific direction.
At present, existed a lot of beam forming techniques to be applied to achievement in research in the MBS transmission, these achievements can roughly be divided into two big classes: the algorithm of the weights that compute beam is shaped and carry out the agreement of transfer of data to the different receivers group.
But, the algorithm of the weights that existing compute beam is shaped is to be difficult to realize technically, this is very big because of the expense of the CSI estimated value of obtaining all MBS receivers, particularly in the time of a large amount of receiver, it is big unusually that the expense of CSI can become, and corresponding processing delay can make base station (BS) can not obtain accurate and real-time CSI estimated value.And for the situation of different fading channels, processing mode is the same, and the time diversity that can not obtain, existing technical scheme relevant for the MBS transfer of data await further to improve and optimize.
Summary of the invention
The technical problem underlying that the embodiment of the invention will solve provides method, the Apparatus and system of realizing the MBS transfer of data, thereby realizes the transmission of MBS data simply, efficiently, and has increased the base station gain, has improved the coverage of base station.
The embodiment of the invention provides a kind of method of the MBS of realization transfer of data, comprising:
Adopting training protocol to carry out beam modes selects;
According to the fading channel situation, by the beam modes of described selection, employing is not carried out the MBS transfer of data with the beam forming technique of time diversity or band time diversity.
The embodiment of the invention also provides a kind of MBS data sending device, comprising:
The beam modes selected cell is used for adopting training protocol to select beam modes;
MBS data transmission unit one is used for the beam modes by described selection, and employing does not send the MBS data with the MBS beam forming technique of time diversity;
MBS data transmission unit two is used for the beam modes by described selection, adopts the MBS beam forming technique of band time diversity to send the MBS data.
The embodiment of the invention also provides a kind of MBS data sink, comprising:
Beam modes is selected auxiliary unit, is used for auxiliary MBS data sending device and finishes the beam modes selection;
The MBS packet receives and merge cells, is used for receiving the MBS data that the MBS data sending device sends, and the same packet that repeatedly sends is merged;
MBS data packet detecting unit unit is for detection of the MBS packet that described MBS packet receives and merge cells receives.
The embodiment of the invention also provides a kind of system of the MBS of realization transfer of data, comprises the MBS data sending device, is connected in the available communication mode with the MBS data sink, and described MBS dispensing device is used for adopting training protocol to select beam modes; According to the fading channel situation, by the beam modes of described selection, employing is not sent to the MBS receiver with the beam forming technique of time diversity or band time diversity with the MBS data.
The technical scheme that is provided by the invention described above embodiment as can be seen, the embodiment of the invention is selected the optimal beam pattern by training protocol, and according to the fading channel situation, by the beam modes of described selection, employing is not carried out the MBS transfer of data with the beam forming technique of time diversity or band time diversity.Thereby realize the transmission of MBS data simply, efficiently, and can increase the performance gain of base station, improve the coverage of base station.
Description of drawings
Fig. 1 carries out the training protocol operational flowchart for the realization MBS data transmission method that the embodiment of the invention provides;
The realization MBS data transmission method that Fig. 2 provides for the embodiment of the invention does not adopt time diversity technique to carry out MBS data transmission procedure schematic diagram;
The realization MBS data transmission method that Fig. 3 provides for the embodiment of the invention adopts time diversity technique to carry out MBS data transmission procedure schematic diagram;
The realization MBS data transmission system structural representation that Fig. 4 provides for the embodiment of the invention;
The MBS data sending device structural representation that Fig. 5 provides for the embodiment of the invention;
The beam modes selected cell structural representation that Fig. 6 provides for the embodiment of the invention;
The MBS receiver apparatus structural representation that Fig. 7 provides for the embodiment of the invention;
Fig. 8 selects the auxiliary unit structural representation for the beam modes that the embodiment of the invention provides.
Embodiment
The embodiment of the invention provides a kind of method, Apparatus and system of realizing Multimedia Broadcast Multicast Service (MBS) transmission, at different fading channel situations, employing is not carried out the MBS transfer of data with the MBS beam forming technique of time diversity technique or band time diversity technique, thereby realizes the MBS transfer of data simply, efficiently.
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing the embodiment of the invention is described in further detail.
Use for specific MBS, MBS receiver (being terminal) normally is randomly dispersed in the sector of base station, and the concrete distributing position of MBS receiver is not also known in the base station.Select in order to make the base station can carry out beam modes easily, the embodiment of the invention provides a kind of comparatively simple training protocol, can not increase along with the increase of the number of MBS receiver thereby make the base station carry out overhead that beam modes selects.
The method of the realization MBS transmission that the embodiment of the invention provides adopts training protocol to carry out the process that beam modes is selected, and specifically can comprise as shown in Figure 1:
Need to prove that descending training pilot tone one is that the base station does not adopt the wave beam technology of embarking on journey to send.
Concrete, the base station can select a certain direction wave beam to carry out training protocol in its coverage arbitrarily, and the beam forming technique that employing is fixed namely makes a certain direction of beam position, and sends descending training pilot tone to this direction.
Concrete, in the training process of a certain direction beam modes, the MBS receiver is estimated the signal strength signal intensity that receive this moment according to the descending training pilot tone two of the employing beam forming technique that receives, and judges whether this signal strength signal intensity surpasses the setting threshold value that step 12 receives signal strength signal intensity.If the signal strength signal intensity of the employing beam forming technique that the MBS receiver receives is then thought this MBS receiver in the coverage of this direction wave beam greater than the reception signal strength signal intensity of step 12, the MBS receiver number in this direction coverage increases by 1.
The training protocol that the embodiment of the invention provides can be known the number of MBS receiver in the beam coverage in order to ensure the base station, requires all the MBS receivers in this direction beam coverage to send normalized up training pilot tone simultaneously.
Because the up training pilot tone that the MBS receiver sends is the MBS receiver according to the contrary direction transformation of the descending training pilot tone that receives, sent by the base station, therefore, the up training pilot tone that sends of different MBS receiver is relevant with the descending training pilot tone that it receives separately.But, because the distributing position difference of MBS receiver, and reasons such as channel fading and path loss, the different MBS receiver in the same beam coverage, the descending training pilot tone that receives is different.
In order to realize that all the MBS receivers in the same beam coverage send normalized up training pilot tone simultaneously, the embodiment of the invention is introduced the concept of normalization desired value.This normalization desired value is the value that interior all the MBS receivers of same beam coverage send normalized up training pilot tone simultaneously.
The base station can send the MBS receiver temporal information of normalized up training pilot tone simultaneously, and the normalization desired value of up training pilot tone perhaps is sent to all the MBS receivers in a certain beam coverage separately by sending descending training pilot tone transmission.In addition, also can in advance the MBS receiver be sent simultaneously the temporal information of normalized up training pilot tone, and the normalization desired value of up training pilot tone is arranged in the MBS receiver.
All MBS receivers in the same beam coverage can be multiplied by normalization factor with up training pilot tone separately, thereby realize the up training pilot tone normalization that all the MBS receivers in the same beam coverage will send, and be sent to the base station simultaneously.
Need to prove that above-mentioned normalization factor can be by with the normalization desired value, determine with the ratio of all MBS receivers up training pilot tone separately in the same beam coverage.The normalization factor that is the different MBS receiver can be different.
Concrete, the base station utilizes corresponding direction beam modes to receive up training pilot tone.Because it all is to fix as can be known that the up training pilot tone that all MBS receivers send arrives power and the phase place of base station, so, the normalized up training number of pilots that the base station receives in this beam direction just equals the MBS receiver number in this beam coverage.If the MBS receiver number in the described direction beam coverage is selected this direction wave beam greater than zero.
Need to prove, because all the MBS receivers in a certain direction beam coverage send normalized up training pilot tone simultaneously, therefore, in the process of base station MBS receiver number in knowing this direction beam coverage, overhead is very little, has accelerated the processing speed of base station.
Can under the little situation of overhead, measure the signal strength signal intensity gross power that all MBS in a certain direction beam coverage receive in order to make the base station, the training protocol that the embodiment of the invention provides requires all MBS receivers in a certain direction beam coverage to send the up training pilot tone of unified power simultaneously, guarantees that namely the power of all MBS receiver emissions is identical.
Concrete, the base station utilizes corresponding direction beam modes to receive up training pilot tone that all MBS receivers send in this beam coverage, unified power, rotate the up training pilot power that all MBS receivers send by virtual phase place, and homophase addition, the up training pilot power summation that obtains, the power summation of this up training pilot tone is the signal strength signal intensity gross power that receives of all MBS receivers in this direction beam coverage so.
So far, the training protocol of a certain direction wave beam has been finished in the base station, thereby has obtained the MBS receiver number in this direction beam coverage, and the signal strength signal intensity gross power of interior all the MBS receivers of this beam modes coverage.
Subsequent base stations can repeated execution of steps 13 to step 18, until the training protocol of finishing all direction wave beams of base station.
Need to prove that the method for the realization MBS transmission that the embodiment of the invention provides realizes that the front and back order of the operating procedure of training protocol can be adjusted accordingly in the specific implementation process, such as the front and back order of step 15 to step 17.Therefore be understandable that in the technical scope that the embodiment of the invention discloses, the order adjustment of any execution in step all should be encompassed within protection scope of the present invention.
After adopting training protocol to handle, the base station can be estimated the number of the MBS receiver in a certain direction beam coverage by normalized up training total number of pilots, estimates the signal strength signal intensity gross power that the MBS receiver in some direction velocity of wave coverages receives by up training pilot power summation.And the base station can also utilize MBS quantity and the signal strength signal intensity gross power in the above-mentioned a certain direction beam coverage, estimates the average received signal strength of the MBS receiver in a certain direction beam coverage.
Illustrate, suppose to have N direction wave beam.Based on above-mentioned training protocol operating process, the base station can estimate that the MBS receiver number in i direction beam coverage is:
k
(i)，i＝1，...，N
Simultaneously, the base station can estimate the average received signal strength of each the MBS receiver in i direction beam coverage and is:
The base station is according to k
(i)Value is carried out beam modes and is selected.Concrete, if k
(i)＞0, the base station can be determined to have the MBS receiver in the corresponding direction beam coverage, and then this direction wave beam will be selected in the base station.Conversely, if k
(i)=0, corresponding direction wave beam does not just select.
It should be noted that also that in addition if adopt beam forming technique, then the power division of all selecteed direction wave beams should make that the average received signal strength of each MBS receiver is all consistent.Like this, then can make most MBS receiver receive the signal of same intensity, thereby can improve the minimum data rates of MBS receiver.So, the embodiment of the invention has been introduced the concept of power division weights in order to realize above-mentioned beneficial effect.
Suppose that i direction wave beam is selected, then the power division weights of i direction wave beam just can for:
In order to realize that the MBS receiver under all base stations can receive identical reception signal strength signal intensity, so, under hypothesis i and m selecteed situation of direction wave beam, then can think:
β
(i) q (i)＝β
(m) q (m)
So, after formula calculating, the average received signal strength of all the MBS receivers in the selecteed beam modes coverage is all equated, thereby can realize increasing the purpose of base station range.
In addition, though the MBS receiver is mobile, the variation of the location distribution of receiver can't be too fast, so the method for the realization MBS transfer of data that the embodiment of the invention provides need not to carry out frequently training protocol.And, cover more MBS receiver in order to make a certain beam modes, in the preferable implementation of the method for the realization MBS transfer of data that the embodiment of the invention provides, can adopt wideer fixed-direction wave beam.
After above-mentioned employing training protocol and correlation formula calculating, the method for the realization MBS transmission that the embodiment of the invention provides has determined to exist the beam direction of MBS receiver and the power that sends the MBS data.The method of the realization MBS transmission that the so follow-up embodiment of the invention provides can be at different fading channel situations, and selection is not carried out the MBS transfer of data with the MBS beam forming technique of time diversity or band time diversity.
Concrete, between frame and frame, being approximately static change if work as fading channel, the base station can adopt the MBS beam forming technique of not being with time diversity to carry out the MBS transfer of data.
As shown in Figure 2, the base station specifically can adopt the beam modes of respective direction to launch each MBS packet, and only launches once.The MBS receiver, namely terminal detects the MBS packet that receives.
If fading channel is non-static change between frame and frame, namely be changed significantly, the base station can adopt the MBS beam forming technique of band time diversity to carry out the MBS transfer of data.
As shown in Figure 3, the base station specifically can divide same MBS packet a plurality of times to adopt the wave beam of respective direction to carry out repeat its transmission, the MBS receiver, namely terminal can merge a plurality of identical MBS packet that receives, thereby can be so that the user obtains optimum gain.
What need further specify is, among another embodiment of method of the realization MBS transfer of data that the embodiment of the invention provides, also can adopt other beam modes systems of selection to carry out the selection of beam modes, and follow-up at different fading channel situations, adopt with time diversity or adopt the wave beam technology of embarking on journey of band time diversity to carry out M BS transfer of data.
By foregoing description as can be seen, the embodiment of the invention has provided the simple training algorithm of a cover, the beam modes of selection, and employing is not carried out the MBS transfer of data with the beam forming technique of time diversity or band time diversity.Thereby realize the transmission of MBS data simply, efficiently, and can increase the performance gain of base station, improve the coverage of base station.And the embodiment of the invention can also adopt and realize that the training protocol simple, that overhead is little carries out the selection of beam modes, thereby when making the base station carry out the MBS transfer of data, overhead is little.
The embodiment of the invention also provides a kind of system of the MBS of realization transfer of data, and as shown in Figure 4, this system specifically can be made up of MBS data sending device 410 and MBS data sink 420.
MBS data sending device 410 specifically can be as shown in Figure 5, and by beam modes selected cell 411, MBS data transmission unit 1 and MBS data transmission unit 413 are formed, wherein:
1) the beam modes selected cell 411, are used for selecting the optimal beam pattern.
The beam modes selected cell 411 that the embodiment of the invention is related can be by adopting completely newly and training protocol efficiently, thereby under the little situation of overhead, realize the selection of beam modes simply, quickly.Other it should be noted that, the beam modes selected cell 411 that the embodiment of the invention provides also can adopt other beam selection methods to carry out beam modes and select, for the ease of understanding, be example to adopt training protocol below, beam modes selected cell 411 is described in detail.
Beam modes selected cell 411 specifically can comprise as shown in Figure 6:
Descending training pilot tone sending module 1 is used for sending the descending training pilot tone one of sending to all MBS receivers.
Descending training pilot tone sending module 2 4112 be used for to adopt beam forming technique, and the MBS receiver in the different directions beam coverage sends descending training pilot tone two respectively.
MBS receiver number acquisition module 4113 is used for the number according to the up training pilot tone of normalization of MBS receiver transmission, obtains the number of MBS receiver in a certain direction beam coverage.
And MBS receiver number is greater than zero in a certain direction beam coverage when MBS receiver number acquisition module 4113 obtains, and then beam modes selected cell 411 is selected this wave beam; Otherwise beam modes selected cell 411 is abandoned this wave beam.
MBS receiver signal strength gross power acquisition module 4114 is used for the up training pilot tone according to the unified power of MBS receiver transmission, obtains the reception signal strength signal intensity gross power of the MBS receiver in a certain direction beam coverage.
The up training pilot tone homophase addition that MBS receiver gross power acquiring unit 4114 specifically can send all the MBS receivers in a certain direction beam coverage simultaneously and power is unified, thus the signal strength signal intensity gross power of all the MBS receivers in a certain direction beam coverage obtained.
Average power is calculated module 4115, the number of the MBS receiver in a certain direction beam coverage that is used for obtaining according to MBS receiver number acquisition module 4113, and the reception signal strength signal intensity gross power of the MBS receiver in this direction beam coverage of obtaining of MBS receiver gross power acquisition module 4114, calculate the average received signal strength of obtaining this direction MBS receiver.
In addition, because beam modes selected cell 410 need carry out training protocol in all beam coverage of base station, therefore, average power is calculated module 4115 and further can also be used for calculating obtaining the average signal receiving intensity that all MBS receive.
Average power is calculated module 4115 related parameter and formula and is comprised:
I the interior MBS receiver number of direction beam coverage is:
k
(i)，i＝1，...，N
The average received signal strength of each the MBS receiver in i direction beam coverage is:
The power division weights of i direction wave beam:
Above-mentioned formula all is selected as example with the i direction.
The principle that average power calculating module 4115 is calculated is:
Suppose then can think under i and m the selecteed situation of direction wave beam:
β
(i)q
(i)＝β
(m)q
(m)
Beam modes selected cell 410 further can also comprise (not illustrating in the accompanying drawing 6):
Normalization desired value and time information transmitting unit be used for to the normalization desired value of the MBS receiver transmission normalized up training pilot tone of wanting, and the MBS receiver send the required transmission time information of the up training pilot tone of normalization simultaneously; Perhaps
Normalization desired value and time information setting unit are used in advance normalization desired value and temporal information being arranged in the MBS receiver.
Because beam modes selected cell 410 can send normalization desired value and time information in company with descending training pilot tone together, therefore, beam modes selected cell 410 also can not arrange above-mentioned normalization desired value and time information transmitting unit and the unit is set.
2) the MBS data transmission unit 1, is used for employing and do not send the MBS data with the MBS beam forming technique of time diversity.
3) the MBS data transmission unit 2 413, are used for adopting the MBS beam forming technique of band time diversity to send the MBS data.
The MBS data sending device 410 that the embodiment of the invention is related, can also be according to the fading channel situation, adopt not with the beam forming technique of time diversity or band time diversity, select the corresponding beam modes of being selected by beam modes selected cell 411 to send the MBS data.
Concrete, if when fading channel is approximately static change between frame and frame, MBS data sending device 410 can adopt the MBS beam forming technique of not being with time diversity to send the MBS transfer of data.
As shown in Figure 2, MBS data sending device 410 each MBS packet can be adopted counterparty to beam modes launch, and only emission is once.Detected the MBS packet that receives by the MBS receiver.
If working as fading channel is non-static change at frame and frame, MBS data sending device 410 can adopt the MBS beam forming technique of band time diversity to send the MBS transfer of data.
As shown in Figure 3, MBS data sending device 410 can divide a plurality of times with same MBS packet, and adopt the counterparty to beam modes carry out repeat its transmission, the MBS receiver can merge a plurality of identical MBS packet that receives, thereby and the MBS packet that detects after merging can be so that the user obtains optimum gain.
Need to prove that MBS data sending device 410 also can only arrange a MBS data transmission blocks, this MBS data transmission blocks is according to the situation of fading channel, and employing does not send the MBS data with the beam forming technique of time diversity or band time diversity respectively.
The related MBS dispensing device of the embodiment of the invention specifically can be arranged in the base station, perhaps is arranged in other functional entitys, perhaps independently is arranged in the network
The related MBS receiving system 420 of the embodiment of the invention specifically can be selected auxiliary unit 421 by beam modes as shown in Figure 7, and the MBS packet receives and merge cells 422 and MBS data packet detecting unit unit 423 compositions, wherein:
1) beam modes is selected auxiliary unit 421, and the MBS data sending device 410 that is used in the auxiliary system is finished the beam modes selection.
As shown in Figure 8, beam modes selects auxiliary unit 421 specifically can comprise:
Signal strength signal intensity determination module 1 is used for receiving descending training pilot tone one, and according to this descending training pilot tone, estimates and receive signal strength signal intensity one this moment.
Signal strength signal intensity determination module 2 4212 is used for receiving the descending training pilot tone two that adopts beam forming technique to send, and according to this descending training pilot tone, estimates and receive signal strength signal intensity two this moment.
Affiliated beam area determination module 4213, be used for the comparison between the reception signal strength signal intensity two that the reception signal strength signal intensity one that estimates according to signal strength signal intensity determination module 1 and signal strength signal intensity determination module 2 4212 estimate, determine the beam area that the MBS receiver is affiliated.
Concrete, during the setting threshold value of the reception signal strength signal intensity one that the reception signal strength signal intensity two that estimates when signal strength signal intensity determination module 2 4212 estimates greater than signal strength signal intensity determination module 1, then the MBS receiver belongs in the beam coverage of a certain direction that signal strength signal intensity determination module 2 4212 receives, otherwise then the MBS receiver does not belong in the beam coverage of a certain direction that signal strength signal intensity determination module 2 4212 receives.
Affiliated beam area determination module 4213 also is used for after definite MBS receiver belongs to the beam coverage of a certain direction, trigger the up training pilot tone of the normalization sending module 4214 that beam modes selects auxiliary unit 421 to comprise, and the up training pilot tone of unified power sending module 4215.
The up training pilot tone of normalization sending module 4214 is used under the triggering of affiliated beam area determination module 4213, sends normalized up training pilot tone to MBS data sending device 410.
Need to prove that all the MBS receivers in the beam coverage of the direction that coexists need send normalized up training pilot tone simultaneously.Detailed process sees also the description process of said method.
The up training pilot tone of unified power sending module 4215 is used under the triggering of affiliated beam area determination module 4213, sends the up training pilot tone of unified power to MBS data sending device 410.
Need to prove that all the MBS receivers in the beam coverage of the direction that coexists need to send simultaneously the up training pilot tone of unified power.Detailed process sees also the description process of said method.
Need to prove that above-mentioned signal strength signal intensity determination module 1 and signal strength signal intensity determination module 2 4212 can be merged into a functional module, and carry out the function that receives all descending training pilot tones.
2) the MBS packet receives and merge cells 422, be used for receiving the MBS data that MBS data sending device 410 sends, and when MBS data sending device 410 adopts the MBS beam forming technique of band time diversity to send the MBS data, the same packet that repeatedly sends is merged.
3) MBS data packet detecting unit unit 423 is for detection of the MBS packet that the MBS packet receives and merge cells 422 receives.
The related MBS data sink of the embodiment of the invention specifically can be arranged in the MBS receiver, perhaps is arranged in other functional entitys, perhaps in independent setting and the network.
By foregoing description as can be seen, the system of the realization MBS transfer of data that the embodiment of the invention provides, by selecting the optimal beam pattern, and according to the fading channel situation, by the beam modes of described selection, employing is not carried out the MBS transfer of data with the beam forming technique of time diversity or band time diversity.Thereby realize the transmission of MBS data simply, efficiently, and can increase the performance gain of base station, improve the coverage of base station.And the embodiment of the invention can also adopt and realize that the training protocol simple, that overhead is little carries out the selection of beam modes, thereby when making the base station carry out the MBS transfer of data, overhead is little.
" reception " word among this embodiment can be understood as and initiatively obtains from other modules also can be to receive the information that other modules are sent.Above-mentioned module can be distributed in a device, also can be distributed in a plurality of devices.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in the accompanying drawing might not be that enforcement the present invention is necessary.
The invention described above embodiment sequence number does not represent the quality of embodiment just to description.
The scheme of the content record of claim also is the protection range of the embodiment of the invention.
One of ordinary skill in the art will appreciate that all or part of processing in above-described embodiment method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium.
The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement 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 of claim.
Claims (8)
1. a method that realizes Multimedia Broadcast Multicast Service MBS transfer of data is characterized in that, comprising:
Adopting training protocol to carry out beam modes selects;
According to the fading channel situation, by the beam modes of described selection, employing is not carried out the MBS transfer of data with the beam forming technique of time diversity or band time diversity;
Described employing training protocol carries out beam modes and selects specifically to comprise:
Send descending training pilot tone one to all MBS receivers;
Adopt beam forming technique to send descending training pilot tone two to a direction beam coverage;
According to the up training pilot tone of normalization that the MBS receiver in the described direction beam coverage sends simultaneously, determine the MBS receiver number in the described direction beam coverage;
The up training pilot tone of the unified power that sends simultaneously according to the MBS receiver in the described direction beam coverage determines that the MBS receiver in the described direction beam coverage receives the signal strength signal intensity gross power;
According to described reception signal strength signal intensity gross power and described MBS receiver number, obtain the average signal strength of described direction MBS receiver;
If the MBS receiver number in the described direction beam coverage is selected this direction wave beam greater than zero.
2. method according to claim 1 is characterized in that, the described normalized up training pilot tone that sends simultaneously according to the MBS receiver in the described direction beam coverage determines that the MBS receiver number in the described direction beam coverage comprises:
If the reception signal strength signal intensity that the MBS receiver is estimated according to described descending training pilot tone two is greater than the setting threshold value of the reception signal strength signal intensity of estimating according to described descending training pilot tone one, then the MBS receiver number of described direction increases by 1.
3. method according to claim 2 is characterized in that, calculates the interior MBS receiver number of all direction beam coverage and the average signal strength of MBS receiver.
4. method according to claim 3, it is characterized in that, direction wave beam to all described selections, average signal strength according to the MBS receiver in this direction beam coverage, obtain the power division weights of this direction wave beam, it is equal that described power division weights make each described MBS receiver of this direction receive signal strength signal intensity.
5. method according to claim 1 is characterized in that, and is described according to the fading channel situation, by the beam modes of described selection, adopts not beam forming technique with time diversity or band time diversity to carry out the MBS transfer of data and comprises:
If fading channel is static change between frame and frame, with the MBS packet transmission once;
If fading channel is non-static change between frame and frame, with same MBS packet in a plurality of time repeat its transmission.
6. a MBS data sending device is characterized in that, comprising:
The beam modes selected cell is used for adopting training protocol to select beam modes; MBS data transmission unit one is used for the beam modes by described selection, and employing does not send the MBS data with the MBS beam forming technique of time diversity;
MBS data transmission unit two is used for the beam modes by described selection, adopts the MBS beam forming technique of band time diversity to send the MBS data;
Described beam modes selected cell comprises:
Descending training pilot tone sending module one is used for sending training pilot tone one under all MBS receivers;
Descending training pilot tone sending module two is used for adopting beam forming technique, and the MBS receiver in a direction beam coverage sends training pilot tone two;
MBS receiver number acquisition module for the number of the up training pilot tone of normalization that sends simultaneously according to all the MBS receivers in the described direction beam coverage, obtains the number of MBS receiver in this direction beam coverage;
MBS receiver signal strength gross power acquisition module, for the up training pilot tone of the unified power that sends simultaneously according to all the MBS receivers in the described direction beam coverage, obtain the reception signal strength signal intensity gross power of the MBS receiver in this direction beam coverage;
Average power is calculated module, the number of the MBS receiver in the direction beam coverage that is used for obtaining according to described MBS receiver number acquisition module, and the reception signal strength signal intensity gross power of the MBS receiver in the described direction beam coverage obtained of described MBS receiver signal strength gross power acquisition module, calculate the average received signal strength of obtaining described direction MBS receiver;
Beam direction is selected module, for the MBS receiver number that obtains according to described MBS receiver number acquisition module, selects described MBS receiver number greater than zero corresponding direction wave beam.
7. a MBS data sink is characterized in that, comprises beam modes selection auxiliary unit, the reception of MBS packet and merge cells, MBS data packet detecting unit unit, wherein,
Beam modes is selected auxiliary unit, is used for auxiliary MBS data sending device and finishes the beam modes selection;
The MBS packet receives and merge cells, is used for receiving the MBS data that the MBS data sending device sends, and the same packet that repeatedly sends is merged;
MBS data packet detecting unit unit is for detection of the MBS packet that described MBS packet receives and merge cells receives;
Described beam modes selects auxiliary unit to comprise:
Signal strength signal intensity determination module one is used for receiving the descending training pilot tone one that the MBS receiving system sends, and according to described descending training pilot tone one, estimates and receive signal strength signal intensity one this moment;
Signal strength signal intensity determination module two is used for receiving the descending training pilot tone two that adopts beam forming technique to send, and according to described descending training pilot tone two, estimates and receive signal strength signal intensity two this moment;
Affiliated beam area determination module is used for the reception signal strength signal intensity one that estimates according to signal strength signal intensity determination module one and the reception signal strength signal intensity that signal strength signal intensity determination module two estimates, and determines the beam area that the MBS receiver is affiliated;
The up training pilot tone of normalization sending module is used for sending normalized up training pilot tone to the MBS data sending device under the triggering of affiliated beam area determination module;
The up training pilot tone of unified power sending module is used for sending the up training pilot tone of unified power to the MBS data sending device under the triggering of affiliated beam area determination module.
8. a system that realizes the MBS transfer of data comprises MBS data sending device as claimed in claim 6, is connected in the available communication mode with MBS data sink as claimed in claim 7, it is characterized in that,
Described MBS data sending device is used for adopting training protocol to select beam modes; According to the fading channel situation, by the beam modes of described selection, employing is not sent to the MBS receiver with the beam forming technique of time diversity or band time diversity with the MBS data.
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| CN104734805A (en) * | 2013-12-20 | 2015-06-24 | 中兴通讯股份有限公司 | Wave beam quality information feedback method and system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101047423A (en) * | 2006-04-10 | 2007-10-03 | 华为技术有限公司 | Multi-user radio relay method and system |
| CN101090286A (en) * | 2006-06-12 | 2007-12-19 | 清华大学 | Radio system, base station device and terminal device |
| CN101166143A (en) * | 2006-10-18 | 2008-04-23 | 华为技术有限公司 | Receiving method and system for multicast broadcast service |
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| CN101047423A (en) * | 2006-04-10 | 2007-10-03 | 华为技术有限公司 | Multi-user radio relay method and system |
| CN101090286A (en) * | 2006-06-12 | 2007-12-19 | 清华大学 | Radio system, base station device and terminal device |
| CN101166143A (en) * | 2006-10-18 | 2008-04-23 | 华为技术有限公司 | Receiving method and system for multicast broadcast service |
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