CN101931989B - Feedback method and device - Google Patents
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Abstract
The invention discloses a feedback method and a device in a coordinated multiple point (CoMP) transmission system. The embodiment of the invention adopts corresponding feedback modes which are set based on different transmission modes or member carriers, and configures different measurement sets for a terminal according to the different feedback modes, so that after the feedback mode is determined, the terminal can determine the corresponding measurement sets according to the feedback mode and feed the channel state information measured by the measurement set back to a base station, thereby avoiding the problem in the prior art that no matter which feedback mode is configured for the terminal, the terminal needs to take the same cell sets as measurement objects so as to feed all or partial measured channel state information back to the base station. Compared with the prior art, the invention has the advantages of greatly reducing feedback signaling expenses and being favor for improving the frequency spectrum efficiency of the system.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of feedback method and device.
Background technology
In the 4th third-generation mobile communication system, the cooperative multipoint transmission technology is being brought into play irreplaceable effect promoting significantly aspect the spectrum efficiency.So-called cooperative multipoint transmission technology refers to a plurality of access points (Access Point) that are separated from each other on the geographical position and provides data transport service for one or more users simultaneously.
For the cooperative multipoint transmission technology, before carrying out the coordinate multipoint emission or receiving, terminal (UE, User Equipment, subscriber equipment, be terminal) need the channel condition information (CSI of the set of cells at feedback (or be called report) self place, Channel State Information), be that terminal is given the base station with the channel condition information between this terminal and the candidate's access point (or inserting point set), so that the base station can use this channel condition information to carry out the selection of access point (or inserting point set) and the scheduling of the running time-frequency resource that transmission is used as input variable (perhaps reference quantity).
The cooperative multipoint transmission scheme has a variety of, such as descending single user's Combined Treatment, descending multi-user association processing, downlink wave beam coordination or descending scheduling coordination etc., in the prior art, all may need to formulate different feedback models for every kind of cooperative multipoint transmission scheme, be feedback content and feedback method, so that terminal can feed back to the base station with channel condition information according to suitable feedback model; Wherein, the corresponding residential quarter of different feedback models is identical, namely no matter terminal configuration be which kind of feedback model, terminal all needs all residential quarters in self residing set of cells as measurement target, the all or part of channel condition information that measures is fed back to the base station, therefore the signaling consumption of feedback is bigger, is unfavorable for improving the spectrum efficiency of system.
Summary of the invention
The embodiment of the invention provides a kind of feedback method and device, can reduce the signaling consumption of feedback.
A kind of feedback method, this method comprises:
Determine feedback model;
Determine the measuring assembly corresponding with described feedback model;
Described definite measuring assembly is measured, obtained channel condition information;
The channel condition information that obtains is fed back to the base station.
A kind of feedback method, this method comprises:
Determine feedback model according to down collaboration multicast communication pattern or member carrier;
Described definite feedback model is sent to terminal, is used for described terminal and determines the measuring assembly corresponding with described feedback model.
A kind of feedback method, this method comprises:
Determine down collaboration multicast communication pattern under the described down collaboration multicast communication scheme according to the down collaboration multicast communication scheme of selecting, wherein, every kind of corresponding at least a down collaboration multicast communication scheme of down collaboration multicast communication pattern;
Determine feedback model according to down collaboration multicast communication pattern, wherein, every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern.
A kind of feedback method, this method comprises:
Determine that according to feedback model the down collaboration multicast communication pattern of described feedback model correspondence, wherein said feedback model are that the base station sends;
According to dynamic signaling and the described definite down collaboration multicast communication pattern that the base station sends, determine down collaboration multicast communication scheme, wherein said down collaboration multicast communication scheme belongs to described down collaboration multicast communication pattern.
A kind of terminal comprises:
Determining unit is used for determining feedback model;
Selected cell is for the corresponding measuring assembly of determining to determine with described determining unit of feedback model;
Measuring unit is used for the measuring assembly that described selected cell is determined is measured, and obtains channel condition information;
Feedback unit, the channel condition information that is used for described measuring unit is obtained feeds back to the base station.
A kind of base station comprises:
Selected cell is used for determining feedback model according to down collaboration multicast communication pattern or member carrier;
Transmitting element is used for issuing the definite feedback model of described selected cell and gives terminal, so that terminal is determined the measuring assembly corresponding with described feedback model.
The embodiment of the invention adopts based on different transmission modes or member carrier, set corresponding feedback model, then at different feedback models, terminal is disposed different measuring assemblies again, make terminal after determining feedback model, can determine corresponding measuring assembly according to feedback model, and will feed back to the base station to the channel condition information that measuring assembly measures, avoided in the prior art, no matter which kind of feedback model terminal configuration is, terminal all needs all residential quarters in self residing set of cells as measurement target, the all or part of channel condition information that measures is fed back to the problem of base station, compared with prior art, reduce the signaling consumption of feedback greatly, be conducive to improve the spectrum efficiency of system.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the method that provides of the embodiment of the invention one;
Fig. 2 is the flow chart of the method that provides of the embodiment of the invention two;
Fig. 3 is the scene schematic diagram of the method that provides of the embodiment of the invention three;
Fig. 4 is the structural representation of the terminal that provides of the embodiment of the invention;
Fig. 5 is the structural representation of the base station that provides of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The embodiment of the invention provides a kind of feedback method and device.Below be elaborated respectively.
Embodiment one,
Present embodiment for example can be implemented by terminal.
A kind of feedback method, comprise: determine feedback model, determine the measuring assembly corresponding with this feedback model according to the feedback model of determining, the measuring assembly of determining is measured, obtain channel condition information, the channel condition information that obtains is fed back to the base station, and as shown in Figure 1, idiographic flow can be as follows:
101, determine feedback model;
For example, can receive the feedback model that the base station issues, wherein, this feedback model is that the base station is determined according to down collaboration multicast communication pattern or member carrier; Perhaps,
Also can select down collaboration multicast communication pattern or member carrier by terminal self, determine feedback model according to down collaboration multicast communication pattern or member carrier then, certainly, if confirm feedback model by terminal, terminal can also be notified to the base station with the feedback model of determining.
Wherein, down collaboration multicast communication pattern can comprise at least a down collaboration multicast communication scheme, simultaneously, and the corresponding a kind of feedback model of a kind of down collaboration multicast communication pattern, in like manner, the corresponding a kind of feedback model of each member carrier or each member carrier group.Feedback model comprises feedback content and feedback method, and definite method of feedback model can be referring to embodiment two and embodiment three.
Different feedback models can adopt different load modes, for example, can pass through broadcast channel, as Physical Broadcast Channel (PBCH, Physical Broadcast Channel) or Dynamic Broadcast Channel (DBCH, Dynamic Broadcast Channel), receive the pattern, cycle etc. of common pilot signal in the feedback model of the residential quarter specific (Cell-Specific) that the base station issues such as the residential quarter; Perhaps, receive specific (UE-Specific) feedback model of user that the base station issues by high-level signaling (Higherlayer signaling).
In like manner, the base station can adopt different load mode to send different feedback models, can reference among the following embodiment, repeat no more.
It should be noted that, after the feedback model that terminal reception base station issues, can also receive the dynamic signaling that the base station sends, dynamic signaling and the feedback model of determining according to described reception, determine the down collaboration multicast communication scheme of use, the down collaboration multicast communication pattern under the wherein said down collaboration multicast communication scheme is corresponding with described definite feedback model.
102, determine the measuring assembly corresponding with described feedback model, i.e. definite measuring assembly corresponding with described feedback model in self residing set of cells.
In the present embodiment, can dispose corresponding measuring assembly and/or report set for each feedback model in advance, also can and/or report set by the corresponding measuring assembly of each feedback model of base station notifying user equipment.Like this, after terminal receives the feedback model that the base station issues, just can select corresponding measuring assembly and/or report set according to corresponding relation that preset or notice according to the feedback model that receives; Wherein, measuring assembly and/or report set can refer to set of cells, or access point set, or antenna set, or frequency resource set repeat no more among the following embodiment.
Wherein, reporting set is the subclass of measuring assembly, can in measuring assembly, select to report accordingly set according to the strategy of setting, perhaps directly determine to report set according to the strategy of setting, wherein, the strategy of setting can be preset in the subscriber equipment, also can be the base station notifying user equipment.To report the corresponding channel condition information of set to feed back to the base station then.Concrete example as can for, when being set in advance in feedback, be that all channel condition informations that will measure all feed back to the base station, still in the channel condition information of the measuring assembly that measures, feed back to the base station according to signal from strong channel condition information to weak at least one residential quarter of selective sequential.When report set was combined into the proper subclass of measuring assembly, feedback reported the channel condition information of set for the channel condition information of feedback measuring assembly, can further reduce the signaling consumption that feeds back.Among the following embodiment, report determining and to repeat no more with reference to said method of set and/or measuring assembly.
103, the measuring assembly of determining is measured, obtained channel condition information, namely obtain the channel condition information of measuring assembly.Concrete method of measurement can be implemented according to prior art.
104, the channel condition information that measures is fed back to the base station, the channel condition information that is about to measure reports the base station.Need be understood that, this moment can be with the whole channel condition informations that measure, the channel condition information that is whole measuring assembly feeds back to the base station, also can determine to report set earlier, being combined in according to the report set of determining then selects corresponding channel condition information to feed back to the base station in the channel condition information that measures, about this point, can not repeat them here referring to the related description of step 102.
Terminal can continue to carry out subsequent operation after feedback according to existing technology, does not repeat them here.
In addition, also it should be noted that, because down collaboration multicast communication pattern comprises at least a down collaboration multicast communication scheme, simultaneously, the corresponding a kind of feedback model of a kind of down collaboration multicast communication pattern, therefore, terminal is after feeding back channel state information, can also receive the dynamic signaling that the base station sends, for example dynamic descending control signaling information.The concrete down collaboration multicast communication scheme of using in the indication down collaboration multicast communication pattern in this dynamic signaling, be that terminal can know that concrete which kind of down collaboration multicast communication scheme what use be to current downlink data by dynamic signaling, in order to adopt processing mode correspondingly to receive the information that the base station issues and the demodulation of finishing related data, like this, can make things convenient for the user between different down collaboration multicast communication schemes, to switch dynamic or semi-staticly.
As from the foregoing, the terminal of present embodiment can be determined corresponding measuring assembly and/or report set according to the feedback model that receives or self determine, and will feed back to the base station to measuring assembly and/or the channel condition information that reports set to measure, avoided in the prior art, no matter which kind of feedback model terminal configuration is, terminal all needs all residential quarters in self residing set of cells as measurement target, the all or part of channel condition information that measures is fed back to the problem of base station, compared with prior art, reduce the signaling consumption of feedback greatly, be conducive to improve the spectrum efficiency of system.
Embodiment two,
Present embodiment for example can be implemented by the base station.
A kind of feedback method comprises: determine feedback model according to down collaboration multicast communication pattern or member carrier; Described definite feedback model is sent to terminal, is used for described terminal and determines the measuring assembly corresponding with described feedback model; After this can receiving terminal the channel condition information of feedback, wherein, measuring assembly obtains channel condition information by measuring by terminal; As shown in Figure 2, idiographic flow can be as follows:
201, determine feedback model according to down collaboration multicast communication pattern or member carrier.
Wherein, feedback model comprises feedback content and feedback method.Every kind of down collaboration multicast communication pattern comprises at least a down collaboration multicast communication scheme, and every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern, therefore every kind of feedback model can corresponding at least a down collaboration multicast communication scheme.That is to say, can determine the down collaboration multicast communication pattern that described down collaboration multicast communication scheme is affiliated according to the down collaboration multicast communication scheme that adopts; According to the corresponding relation of down collaboration multicast communication pattern and feedback model, determine feedback model, the corresponding relation of wherein said down collaboration multicast communication pattern and feedback model is every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern; In like manner, can determine feedback model according to the corresponding relation of member carrier and feedback model, wherein, the corresponding relation of described member carrier and feedback model is the corresponding a kind of feedback model of each member carrier or each member carrier group.
For example, can preestablish N kind feedback model according to the strategy of operator, wherein, N is integer and N＞=1.And then according to different feedback models, be different feedback content and feedback methods, down collaboration multicast communication scheme is classified, for example can be divided into N class down collaboration multicast communication pattern, make this N class down collaboration multicast communication pattern and N kind feedback model corresponding one by one; Certainly, also can classify to down collaboration multicast communication scheme in advance according to the strategy of operator, for example can be divided into N class down collaboration multicast communication pattern, and then it is corresponding one by one with N class down collaboration multicast communication pattern to set N kind feedback model, that is to say, as long as the corresponding relation of pre-set down collaboration multicast communication scheme and down collaboration multicast communication pattern, and the corresponding relation of down collaboration multicast communication pattern and the corresponding relation of feedback model get final product.
In like manner, also can member carrier be divided into the N class according to the covering of member carrier or the difference of load or default transmission method, correspondingly, it is corresponding one by one with it to preestablish N kind feedback model according to the strategy of operator again, and wherein, N is integer and N＞=1.Certainly, also can preestablish N kind feedback model, and then according to different feedback models, utilize the covering of member carrier or the difference of load or default transmission method that member carrier is divided into the N class, make it corresponding one by one with it with the N kind feedback model of setting, that is to say, as long as the corresponding relation of pre-set member carrier and feedback model.
Based on above-mentioned setting, the base station can according to current or last one constantly or next down collaboration multicast communication pattern that adopts constantly determine feedback model; Perhaps determine feedback model according to a current or last moment or next member carrier constantly.
In like manner, terminal also can be based on above-mentioned setting, according to current or last one constantly or next down collaboration multicast communication pattern that adopts constantly determine feedback model; Perhaps determine feedback model according to a current or last moment or next member carrier constantly.
Adopt this method, can improve the flexibility of feedback, reduce the sum of the feedback model of supporting the down collaboration multicast communication.And can avoid too complicated problems of the scheme brought at every kind of cooperative multipoint transmission scheme feedback model that all regulation is different.
For example, if at every kind of down collaboration multicast communication scheme corresponding a kind of feedback model all, when having a large amount of down collaboration multicast communication schemes, it is corresponding with it to make a large amount of feedback models, and present embodiment is with the corresponding a kind of down collaboration multicast communication pattern of multiple down collaboration multicast communication scheme, and for every kind of down collaboration multicast communication pattern arranges corresponding a kind of feedback model, the feedback model of having avoided arranging too much causes scheme too complicated.
Again for example, if new down collaboration multicast communication scheme occurred, if do not have all corresponding a kind of feedback models of middle down collaboration multicast communication scheme, it is corresponding with it then will to formulate new feedback model, and the scheme that adopts the embodiment of the invention to provide, can be with the corresponding a kind of down collaboration multicast communication pattern of multiple down collaboration multicast communication scheme, and set corresponding with it feedback model, when new down collaboration multicast communication scheme having occurred, corresponding certain the down collaboration multicast communication pattern that has existed of down collaboration multicast communication scheme that can this is new, it is corresponding with it to need not to reformulate new feedback model.
202, terminal issues in the step 201 feedback model of determining and gives terminal, so that can be determined the measuring assembly corresponding with this feedback model according to this feedback model in self residing set of cells.
It should be noted that different feedback models can adopt different load modes, for example, the specific feedback model in residential quarter is to terminal in the feedback model of send determining by broadcast channel; And/or the specific feedback model of user is to terminal in the feedback model of send determining by high-level signaling.
Certainly, before this, can dispose corresponding measuring assembly and/or report set for each feedback model, also can and/or report set by the corresponding measuring assembly of each feedback model of base station notifying user equipment; Like this, after terminal receives the feedback model that the base station issues, just can select corresponding measuring assembly and/or report set according to the corresponding relation of configuration or notice according to the feedback model that receives.
It should be noted that, feedback model also can be determined by terminal, if feedback model is determined by terminal, then this moment, the base station did not need execution in step 201 and step 202, but directly the channel condition information of the feedback of receiving terminal gets final product, certainly, the notice about feedback model that all right receiving terminal in base station this moment sends, thus the data such as channel condition information that can feed back terminal better receive and demodulation.
203, the channel condition information of receiving terminal feedback, measuring assembly obtains described channel condition information by measuring by terminal, and concrete method of measurement can be implemented according to prior art.
The base station can continue to carry out subsequent operation after receiving the feedback of terminal according to existing technology, does not repeat them here.
With reference to embodiment one, down collaboration multicast communication pattern can comprise at least a down collaboration multicast communication scheme, therefore, the base station can also be indicated the concrete down collaboration multicast communication scheme of using in the down collaboration multicast communication pattern to terminal by dynamic signaling, namely inform that by dynamic signaling concrete which kind of down collaboration multicast communication scheme what use be to the terminal current data, so that terminal can adopt processing mode correspondingly to receive the information that the base station issues and the demodulation of finishing related data.
As from the foregoing, in the present embodiment, corresponding feedback model can be determined according to different transmission modes or member carrier in the base station, then this feedback model is notified to terminal, make terminal behind the feedback model that receives the base station transmission, can determine corresponding measuring assembly according to feedback model, and will feed back to the base station to the channel condition information that measuring assembly measures, avoided in the prior art, no matter which kind of feedback model terminal configuration is, terminal all needs all residential quarters in self residing set of cells as measurement target, the all or part of channel condition information that measures is fed back to the problem of base station, compared with prior art, reduce the signaling consumption of feedback greatly, be conducive to improve the spectrum efficiency of system.
Embodiment three,
According to embodiment one and two described methods, will elaborate for example below.
For example, can carry out inducing classification to down collaboration multicast communication scheme or member carrier according to the strategy of operator or the demand of system, for example, can be based on different feedback content and feedback method, down collaboration multicast communication scheme is carried out inducing classification, correspondingly, the corresponding feedback model of cooperative multipoint transmission also can be divided into several feedback models, makes that these down collaboration multicast communication patterns and feedback model are one to one.And, based on different feedback models, each user, namely each terminal can be configured different measuring assemblies and/or report set, and namely different feedback model correspondences different measuring assemblies and/or are reported set.
Every kind of down collaboration multicast communication pattern may comprise multiple concrete down collaboration multicast communication scheme, such as descending single user's Combined Treatment, descending multi-user association processing, downlink wave beam coordination or descending scheduling coordination etc., the common ground of these transmission plans is: they have identical feedback model, that is, a kind of feedback model can corresponding multiple down collaboration multicast communication scheme.
For example, can be different based on covering, perhaps load difference, perhaps preset the difference of transmission method, different member carriers is carried out inducing classification, correspondingly, the corresponding feedback model of cooperative multipoint transmission also can be divided into several feedback models, makes that kind and the feedback model of the member carrier behind these inducing classifications are one to one.
Like this, after terminal receives the feedback model that the base station issues, after perhaps terminal self is determined feedback model according to down collaboration multicast communication pattern or member carrier, just can be according to the feedback model that receives or the feedback model of self determining, according to preset before or by the corresponding relation of base station notice (can referring to embodiment one and two), the corresponding relation that is feedback model and measuring assembly is selected corresponding measuring assembly, measuring assembly to this selection is measured, and the channel condition information that feedback measures is to the base station, so that the base station can use this channel condition information to carry out the selection of access point (or inserting point set) and the scheduling of the running time-frequency resource that transmission is used as input variable (perhaps reference quantity).Specifically, owing to the feedback model (being feedback content and feedback system) that every kind of down collaboration multicast communication pattern needs is different, so when terminal works during in different down collaboration multicast communication patterns, feedback model just can be determined according to the down collaboration multicast communication pattern that this terminal adopts in the base station, notifies the different measuring assembly of terminal feedback then or reports channel condition information in the set.In other words, the measuring assembly of terminal or report the scope of set relevant with its transmission mode under the different feedback models, can have different measuring assemblies or report set.
In like manner, in carrier aggregation (Carrier Aggregation) system, because the covering of different members carrier wave may be different, perhaps their load may be different, perhaps default transmission method may be different, so, the measuring assembly of different members carrier wave or report the set also may be different.So when terminal works during at different member carriers, feedback model just can be determined according to the member carrier that this terminal adopts in the base station, notify the different measuring assembly of terminal feedback then or report channel condition information in the set.
Adopt these schemes, on the one hand owing in advance down collaboration multicast communication scheme or the member carrier with identical feedback model carried out inductive generalization, so having avoided need be at the situation of every kind of cooperative multipoint transmission scheme feedback model that all regulation is different in the prior art, can improve the flexibility of feedback, reduce the sum of the feedback model of supporting the down collaboration multicast communication, on the other hand owing to can determine the feedback set according to feedback model, be measuring assembly and/or report set, so can reduce the signaling consumption of feedback, thereby improve the spectrum efficiency of system.
Below will be with descending cooperative multicast system, and the scheme that feedback model is determined by the base station is that example describes.
At first, down collaboration multicast communication scheme is carried out inducing classification, as shown in table 1, different according to feedback content and feedback method, down collaboration multicast communication scheme can be divided into four class transmission modes, each transmission mode is corresponding to a kind of feedback model, and different feedback models has different feedback content and feedback method.The corresponding feedback model i of down collaboration multicast communication pattern i, i.e. down collaboration multicast communication pattern is corresponding one by one with feedback model.For example, down collaboration multicast communication pattern 1 corresponding feedback model 1, down collaboration multicast communication pattern 2 corresponding feedback models 2, the corresponding feedback model 3 of down collaboration multicast communication mode 3, down collaboration multicast communication pattern 4 corresponding feedback models 4.That is, when using down collaboration multicast communication pattern i, just use feedback model i to finish feedback procedure.
Table one:
| Down collaboration multicast communication pattern | Feedback model |
| Down collaboration multicast communication pattern 1: wave beam coordinate scheme | Feedback model 1: the reference signal planing method and the corresponding PMI/CQI that feed back many residential quarters |
| Down collaboration multicast communication pattern 2: scheduling coordinate scheme | Feedback model 2: the PMI/CQI of feedback residential quarter |
| Down collaboration multicast communication mode 3: incoherent Combined Treatment scheme or dynamic cell selection scheme | Feedback model 3: the PMI/CQI that feeds back a plurality of single residential quarters respectively |
| Down collaboration multicast communication pattern 4: relevant Combined Treatment scheme | Feedback model 4: feed back respectively the PMI/CQI of a plurality of single residential quarters and multi-plot joint information (such as: phase adjustment) |
| ...... | ...... |
PMI/CQI in the table one is pre-coding matrix indication (PMI, Procoding Matrix Indicator)/channel quality indication (CQI, Channel Quality Indication).
Then, need be each user according to every kind of feedback model, i.e. the corresponding measuring assembly of each terminal configuration and/or report set.This with report the set be example, suppose that feedback model 1 corresponding report set is combined into { Cell0, Cell1, Cell2}, feedback model 2 corresponding report sets are combined into { Cell0, Cell2, Cell4}, feedback model 3 corresponding report sets are combined into { Cell3, Cell4, Cell5}, feedback model 4 corresponding report sets are combined into { Cell0, Cell4, Cell6}, wherein, Cell0, Cell1, Cell2, Cell3, Cell4, Cell5 and Cell6 etc. all refer to the residential quarter, for convenience, in Fig. 3, represent Cell0 with C0, represent Cell1 with C1, represent Cell2 with C2, represent Cell3 with C3, represent Cell4 with C4, represent Cell5 with C5, represent Cell6 with C6.
In Fig. 3, when terminal is in the position of terminal A, the down collaboration multicast communication scheme that receives is the wave beam coordinate scheme that comes from Cell0+Cell1+Cell2, therefore the base station determines that according to this down collaboration multicast communication scheme down collaboration multicast communication pattern is down collaboration multicast communication pattern 1, and then determine that corresponding feedback model is feedback model 1, so, the base station sends feedback model and is the terminal that is notified to of " feedback model 1 ", after terminal receives, determine that " feedback model 1 " corresponding report set is combined into { Cell0, Cell1, Cell2}, so terminal is with set { Cell0, Cell1, Cell2} is as reporting set, namely measure and feed back (reporting in other words) set { channel condition information of residential quarter is given the base station among the Cell2} for Cell0, Cell1.
And when terminal is in the position of terminal B, the transport-type that receives is the scheduling coordinate scheme that comes from Cell0+Cell2+Cell4, therefore the base station determines that according to this down collaboration multicast communication scheme down collaboration multicast communication pattern is down collaboration multicast communication pattern 2, and then determine that corresponding feedback model is feedback model 2, so, it is feedback model 2 that the base station is notified to the terminal feedback model, after terminal receives, determine that feedback model 2 corresponding report sets are combined into { Cell0, Cell2, Cell4}, so, terminal is with set { Cell0, Cell2, Cell4} be as reporting set, namely measures and feed back (reporting in other words) set { Cell0, Cell2, the channel condition information of residential quarter is given the base station among the Cell4}.
Other down collaboration multicast communication pattern is similar to the above, does not repeat them here.
It should be noted that different feedback models can adopt different load modes, namely for different feedback models, the base station can adopt different transmission channels to be notified to terminal, for example, for the specific feedback model in residential quarter, can be notified to terminal by broadcast channel; For the specific feedback model of user, can be notified to terminal by high-level signaling.
Specifically, for the specific feedback model in residential quarter, such as the pattern of common pilot signal in the residential quarter, cycle etc., because these information are that whole residential quarter is public, this category information of all terminals all is identical in residential quarter, so can be notified to terminal by broadcast channel.And for the specific feedback model of user, because this category information of each terminal is different, so just should not adopt the form of broadcasting to be notified to terminal, therefore, for such feedback model, can be notified to terminal by the form of high-level signaling.Like this, before feeding back, terminal has just known that it should report the channel condition information of those residential quarters, and which kind of feedback model of this employing is with the base station that feeds back to of channel condition information.
It should be noted that, because down collaboration multicast communication pattern comprises at least a down collaboration multicast communication scheme, therefore, the base station can also be indicated the concrete down collaboration multicast communication scheme of using in the down collaboration multicast communication pattern to terminal by dynamic signaling, so that terminal can adopt processing mode correspondingly to receive the information that the base station issues and the demodulation of finishing related data.
What in addition, it will be appreciated that is, this programme in can being used in cooperative multicast system described above, also can apply in the other systems such as carrier aggregation system or multiaerial system.
As from the foregoing, present embodiment adopts based on different transmission modes or member carrier, set corresponding feedback model, then at different feedback models, terminal is disposed different measuring assemblies again, make terminal behind the feedback model that receives the base station transmission, can determine corresponding measuring assembly according to feedback model, and will feed back to the base station to the channel condition information that measuring assembly measures, avoided in the prior art, no matter which kind of feedback model terminal configuration is, terminal all needs all residential quarters in self residing set of cells as measurement target, all or part of channel condition information that measures is fed back to the problem of base station, compared with prior art, reduce the signaling consumption of feedback greatly, be conducive to improve the spectrum efficiency of system.
Meanwhile, because present embodiment is summarized as a kind of down collaboration multicast communication pattern with multiple down collaboration multicast communication scheme, and set corresponding with it feedback model, so having avoided need be at the situation of every kind of cooperative multipoint transmission scheme feedback model that all regulation is different in the prior art, can improve the flexibility of feedback, reduce the sum of the feedback model of supporting the down collaboration multicast communication, and, if the words of new down collaboration multicast communication scheme occurred, down collaboration multicast communication scheme that then can this is new is concluded in certain down collaboration multicast communication pattern that has existed, and it is corresponding with it to need not to reformulate new feedback model.
Embodiment four,
The embodiment of the invention also provides a kind of feedback method, comprise: determine down collaboration multicast communication pattern according to the down collaboration multicast communication scheme of selecting, determine feedback model according to down collaboration multicast communication pattern, wherein, the corresponding at least a down collaboration multicast communication scheme of a kind of down collaboration multicast communication pattern, the corresponding a kind of feedback model of a kind of down collaboration multicast communication pattern is after having determined feedback model, can continue to use existing technical scheme and handle, not repeat them here.
It should be noted that, this scheme specifically can be carried out by base station or terminal, if carried out by the base station, then the base station need be notified to terminal with feedback model after having determined feedback model, same, if carried out by terminal, then terminal can be notified to the base station with feedback model, about the explanation of this point and definite method of feedback model, specifically can not repeat them here referring to other embodiment.
In addition, the embodiment of the invention also provides another kind of feedback method, and this method comprises: determine that according to feedback model the down collaboration multicast communication pattern of described feedback model correspondence, wherein said feedback model are that the base station sends; According to dynamic signaling and the described definite down collaboration multicast communication pattern that the base station sends, determine down collaboration multicast communication scheme, wherein said down collaboration multicast communication scheme belongs to described down collaboration multicast communication pattern.Specifically can not repeat them here referring to other embodiment.
Adopt these methods, can improve the flexibility of feedback, reduce the sum of the feedback model of supporting the down collaboration multicast communication.And can avoid too complicated problems of the scheme brought at every kind of cooperative multipoint transmission scheme feedback model that all regulation is different.
For example, if at every kind of down collaboration multicast communication scheme corresponding a kind of feedback model all, when having a large amount of down collaboration multicast communication schemes, it is corresponding with it to make a large amount of feedback models, and present embodiment is with the corresponding a kind of down collaboration multicast communication pattern of multiple down collaboration multicast communication scheme, and for every kind of down collaboration multicast communication pattern arranges corresponding a kind of feedback model, the feedback model of having avoided arranging too much causes scheme too complicated.
Again for example, if new down collaboration multicast communication scheme occurred, if do not have all corresponding a kind of feedback models of middle down collaboration multicast communication scheme, it is corresponding with it then will to formulate new feedback model, and the scheme that adopts the embodiment of the invention to provide, can be with the corresponding a kind of down collaboration multicast communication pattern of multiple down collaboration multicast communication scheme, and set corresponding with it feedback model, when new down collaboration multicast communication scheme having occurred, corresponding certain the down collaboration multicast communication pattern that has existed of down collaboration multicast communication scheme that can this is new, it is corresponding with it to need not to reformulate new feedback model.
Embodiment five,
In order to implement above method better, the embodiment of the invention also correspondingly provides a kind of terminal, and as shown in Figure 4, this terminal comprises determining unit 501, selected cell 502, measuring unit 503 and feedback unit 504;
Determining unit 501 is used for determining feedback model; For example, can receive the feedback model that the base station issues, wherein, this feedback model is that the base station is determined according to down collaboration multicast communication pattern or member carrier; Perhaps, also can select down collaboration multicast communication pattern or member carrier by terminal self, determine feedback model according to down collaboration multicast communication pattern or member carrier then, certainly, if confirm feedback model by terminal, terminal can also be notified to the base station with the feedback model of determining.
Wherein, feedback model comprises feedback content and feedback method, and different feedback models can adopt different load modes, for example, can receive the specific feedback model in residential quarter that the base station issues by broadcast channel, such as, the pattern of common pilot signal, cycle etc. in the residential quarter; Perhaps, receive the specific feedback model of user that the base station issues by high-level signaling.
Certainly, before this can be in advance for each feedback model dispose corresponding measuring assembly, also can be by the corresponding measuring assembly of each feedback model of base station notifying user equipment; Like this, after terminal receives the feedback model that the base station issues, just can select corresponding measuring assembly according to corresponding relation that preset before or notice according to the feedback model that receives; Wherein, said measuring assembly can refer to set of cells here, or the access point set, or the antenna set, or the frequency resource set.
Measuring unit 503 is used for the measuring assembly that selected cell 502 is determined is measured, and obtains channel condition information; Concrete method of measurement can be implemented according to prior art.
Wherein, feedback unit 504 can comprise reporting module and sending module;
Reporting module is used for determining to report set;
Sending module, be used for according to described reporting module determine report set from described measuring unit to channel condition information select corresponding channel condition information to feed back to the base station.
Determining unit 501 can comprise acquisition module and first determination module;
Acquisition module is used for obtaining the feedback model that the base station sends;
First determination module is used for determining according to the feedback model that described acquisition module obtains the feedback model of this terminal;
Perhaps, determining unit 501 has also and can comprise: second determination module;
Second determination module is used for determining according to down collaboration multicast communication scheme or member carrier the feedback model of this terminal.
More than the concrete enforcement of each unit can not repeat them here referring to method embodiment.
As from the foregoing, the selected cell 502 of the terminal of present embodiment can be determined corresponding measuring assembly according to the feedback model that determining unit 501 is determined, and by feedback unit 504 channel condition information that 503 pairs of measuring assemblies of measuring unit measure is fed back to the base station, avoided in the prior art, no matter which kind of feedback model terminal configuration is, terminal all needs all residential quarters in self residing set of cells as measurement target, the all or part of channel condition information that measures is fed back to the problem of base station, compared with prior art, reduce the signaling consumption of feedback greatly, be conducive to improve the spectrum efficiency of system.
Embodiment six,
In order to implement above method better, the embodiment of the invention also correspondingly provides a kind of base station, and as shown in Figure 5, this base station comprises selected cell 601 and transmitting element 602;
Wherein, down collaboration multicast communication pattern comprises at least a down collaboration multicast communication scheme, feedback model comprises feedback content and feedback method, a kind of feedback model can corresponding multiple down collaboration multicast communication scheme, that is to say, can preestablish N kind feedback model according to the strategy of operator, wherein, N is integer and N＞=1, and then according to different feedback models, namely different feedback content and feedback method classified to down collaboration multicast communication scheme, for example can be divided into N class down collaboration multicast communication pattern, make this N class down collaboration multicast communication pattern and N kind feedback model corresponding one by one; In like manner, also can member carrier be divided into the N class according to the covering of member carrier or the difference of load or default transmission method, correspondingly, it is corresponding one by one with it to preestablish N kind feedback model according to the strategy of operator again, and wherein, N is integer and N＞=1.
Transmitting element 602 is used for issuing selected cell 601 definite feedback models and gives terminal, so that terminal is at definite measuring assembly corresponding with described feedback model;
It should be noted that different feedback models can adopt different load modes, for example, can be by the specific feedback model in the residential quarter that broadcast channel issues, give terminal such as the pattern of common pilot signal in the residential quarter, cycle etc.; Perhaps, can give terminal by the specific feedback model of the user that high-level signaling issues.
Certainly, before this, can also can and/or report set by the corresponding measuring assembly of each feedback model of base station notifying user equipment in advance for each feedback model disposes corresponding measuring assembly; Like this, after terminal receives the feedback model that the base station issues, just can select corresponding measuring assembly according to corresponding relation that preset before or notice according to the feedback model that receives; Wherein, said measuring assembly can refer to set of cells here, or the access point set, or the antenna set, or the frequency resource set.
Certainly, this base station also can comprise receiving element;
Receiving element is used for the channel condition information of the feedback model feedback that receiving terminal issues according to transmitting element 602, and described measuring assembly obtains described channel condition information by measuring by terminal.
Wherein, selected cell 601 can comprise first determination module and second determination module;
First determination module is used for determining the down collaboration multicast communication pattern that described down collaboration multicast communication scheme is affiliated according to the down collaboration multicast communication scheme that adopts;
Second determination module, be used for the corresponding relation according to down collaboration multicast communication pattern and feedback model, determine feedback model, the corresponding relation of wherein said down collaboration multicast communication pattern and feedback model is every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern;
Perhaps, selected cell 601 also can comprise the 3rd determination module;
The 3rd determination module is used for the corresponding relation according to member carrier and feedback model, determines feedback model, and wherein, the corresponding relation of described member carrier and feedback model is the corresponding a kind of feedback model of each member carrier or each member carrier group.
More than the concrete enforcement of each unit can not repeat them here referring to method embodiment.
As from the foregoing, the selected cell 601 of the base station of present embodiment can be determined corresponding feedback model according to different transmission modes or member carrier, by transmitting element 602 this feedback model is notified to terminal then, make terminal behind the feedback model that receives the base station transmission, can determine corresponding measuring assembly according to feedback model, and will feed back to the base station to the channel condition information that measuring assembly measures, avoided in the prior art, no matter which kind of feedback model terminal configuration is, terminal all needs all residential quarters in self residing set of cells as measurement target, the all or part of channel condition information that measures is fed back to the problem of base station, compared with prior art, reduce the signaling consumption of feedback greatly, be conducive to improve the spectrum efficiency of system.
To sum up, the embodiment of the invention adopts based on different transmission modes or member carrier, preestablish corresponding feedback model, then at different feedback models, terminal is disposed different measuring assemblies again and/or reports set, after making that terminal is determined feedback model, can determine corresponding measuring assembly and/or report set according to feedback model, and will feed back to the base station to measuring assembly and/or the channel condition information that reports set to measure, avoided in the prior art, no matter which kind of feedback model terminal configuration is, terminal all needs all residential quarters in self residing set of cells as measurement target, all or part of channel condition information that measures is fed back to the problem of base station, compared with prior art, reduce the signaling consumption of feedback greatly, be conducive to improve the spectrum efficiency of system.
Meanwhile, because present embodiment is summarized as a kind of down collaboration multicast communication pattern with multiple down collaboration multicast communication scheme, and set with it feedback model one to one, so having avoided need be at the situation of every kind of cooperative multipoint transmission scheme feedback model that all regulation is different in the prior art, can improve the flexibility of feedback, reduce the sum of the feedback model of supporting the down collaboration multicast communication, and, if the words of new down collaboration multicast communication scheme occurred, down collaboration multicast communication scheme that then can this is new is concluded in certain down collaboration multicast communication pattern that has existed, it is corresponding with it to need not to reformulate new feedback model, reduces the complexity of its scheme.
Further, the base station can also be indicated the concrete down collaboration multicast communication scheme of using in the down collaboration multicast communication pattern to terminal by dynamic signaling, makes things convenient for the user to switch between different down collaboration multicast communication schemes dynamic or semi-staticly.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of above-described embodiment is to instruct relevant hardware to finish by program, this program can be stored in the computer-readable recording medium, storage medium can comprise: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), disk or CD etc.
More than a kind of feedback method and device that the embodiment of the invention is provided be described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (11)
1. a feedback method is characterized in that, described method comprises:
Determine feedback model;
Determine the measuring assembly corresponding with described feedback model;
Described definite measuring assembly is measured, obtained channel condition information;
The channel condition information that obtains is fed back to the base station;
Described definite feedback model comprises: receive the feedback model that the base station issues, described feedback model is that the base station is determined according to down collaboration multicast communication pattern;
Perhaps, select down collaboration multicast communication pattern, determine feedback model according to described down collaboration multicast communication pattern;
Wherein, determine feedback model according to down collaboration multicast communication pattern, comprise: according to the corresponding relation of down collaboration multicast communication pattern and feedback model, determine feedback model, wherein, the corresponding relation of described down collaboration multicast communication pattern and feedback model is that described down collaboration multicast communication pattern comprises at least a down collaboration multicast communication scheme, and every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern.
2. method according to claim 1 is characterized in that, described determine feedback model according to down collaboration multicast communication pattern after, described method further comprises:
Described definite feedback model is notified to the base station.
3. method according to claim 1 and 2 is characterized in that, describedly the channel condition information that obtains is fed back to the base station comprises:
Determine to report set;
Be combined in the channel condition information that measures according to described definite report set and select corresponding channel condition information to feed back to the base station.
4. method according to claim 1 is characterized in that, also comprises after the feedback model that described reception base station issues:
Receive the dynamic signaling that the base station sends;
According to the dynamic signaling and the feedback model of determining of described reception, determine the down collaboration multicast communication scheme of use, the down collaboration multicast communication pattern under the wherein said down collaboration multicast communication scheme is corresponding with described definite feedback model.
5. a feedback method is characterized in that, described method comprises:
Determine feedback model according to down collaboration multicast communication pattern;
Described definite feedback model is sent to terminal, is used for described terminal and determines the measuring assembly corresponding with described feedback model;
Wherein, determine feedback model according to down collaboration multicast communication pattern, comprising: according to the down collaboration multicast communication scheme that adopts, determine the down collaboration multicast communication pattern that described down collaboration multicast communication scheme is affiliated; According to the corresponding relation of down collaboration multicast communication pattern and feedback model, determine feedback model, the corresponding relation of wherein said down collaboration multicast communication pattern and feedback model is every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern.
6. method according to claim 5 is characterized in that, described the feedback model of determining is sent to terminal, comprising:
Send in described definite feedback model the specific feedback model in residential quarter to terminal by broadcast channel; And/or,
Send in described definite feedback model the specific feedback model of user to terminal by high-level signaling.
7. method according to claim 5 is characterized in that,
By the down collaboration multicast communication scheme that dynamic signaling notifies described terminal to adopt, the down collaboration multicast communication pattern under the wherein said down collaboration multicast communication scheme is corresponding with described definite feedback model.
8. a feedback method is characterized in that, described method comprises:
Determine down collaboration multicast communication pattern under the described down collaboration multicast communication scheme according to the down collaboration multicast communication scheme of selecting, wherein, every kind of corresponding at least a down collaboration multicast communication scheme of down collaboration multicast communication pattern;
Determine feedback model according to down collaboration multicast communication pattern, wherein, every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern.
9. a terminal is characterized in that, described terminal comprises:
Determining unit is used for determining feedback model;
Selected cell is for the corresponding measuring assembly of determining to determine with described determining unit of feedback model;
Measuring unit is used for the measuring assembly that described selected cell is determined is measured, and obtains channel condition information;
Feedback unit, the channel condition information that is used for described measuring unit is obtained feeds back to the base station;
Described determining unit comprises acquisition module and first determination module;
Acquisition module is used for obtaining the feedback model that the base station sends;
First determination module is used for determining according to the feedback model that described acquisition module obtains the feedback model of this terminal;
Perhaps, described determining unit comprises second determination module;
Second determination module is for the feedback model of determining this terminal according to down collaboration multicast communication scheme; Wherein, determine that according to down collaboration multicast communication pattern feedback model comprises: according to the corresponding relation of down collaboration multicast communication pattern and feedback model, determine feedback model, wherein, the corresponding relation of described down collaboration multicast communication pattern and feedback model is, described down collaboration multicast communication pattern comprises at least a down collaboration multicast communication scheme, and every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern.
10. terminal according to claim 9 is characterized in that, described feedback unit comprises:
Reporting module is used for determining to report set;
Sending module is used for selecting corresponding channel condition information to feed back to the base station according to the channel condition information that reports set to obtain from described measuring unit that described reporting module is determined.
11. a base station is characterized in that, described base station comprises:
Selected cell is used for determining feedback model according to down collaboration multicast communication pattern;
Transmitting element is used for issuing the definite feedback model of described selected cell and gives terminal, so that terminal is determined the measuring assembly corresponding with described feedback model;
Described selected cell comprises first determination module and second determination module;
First determination module is used for determining the down collaboration multicast communication pattern that described down collaboration multicast communication scheme is affiliated according to the down collaboration multicast communication scheme that adopts;
Second determination module, be used for the corresponding relation according to down collaboration multicast communication pattern and feedback model, determine feedback model, the corresponding relation of wherein said down collaboration multicast communication pattern and feedback model is every kind of corresponding a kind of feedback model of down collaboration multicast communication pattern.
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| PCT/CN2010/074291 WO2010149038A1 (en) | 2009-06-26 | 2010-06-23 | Feedback method and apparatus |
| CN2010800036427A CN102308618A (en) | 2009-06-26 | 2010-06-23 | Feedback method and apparatus |
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| CN 200910148426 CN101931989B (en) | 2009-06-26 | 2009-06-26 | Feedback method and device |
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