CN101998441A - Method and system for dynamic coordination and data exchange equipment - Google Patents
Method and system for dynamic coordination and data exchange equipment Download PDFInfo
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- CN101998441A CN101998441A CN2009100921176A CN200910092117A CN101998441A CN 101998441 A CN101998441 A CN 101998441A CN 2009100921176 A CN2009100921176 A CN 2009100921176A CN 200910092117 A CN200910092117 A CN 200910092117A CN 101998441 A CN101998441 A CN 101998441A
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Abstract
The invention discloses a method for dynamic coordination, which comprises that: data exchange equipment is preset; a current base-band unit (BBU) receives a measurement report returned by user equipment (UE), determines a coordinated remote radio unit (RRU) set and informs the data exchange equipment; the data exchange equipment takes RRUs which do not belong to a static RRU set corresponding to the current BBU in the coordinated RRU set as a dynamic RRU set corresponding to the current BBU, and merges the static and dynamic RRU sets to acquire a set of all RRUs corresponding to the current BBU; and the current BBU performs data exchange with all the RRUs corresponding to the BBU through the data exchange equipment to realize coordinated transmission of the UE. The invention provides a device for dynamic coordination and the data exchange equipment at the same time. The method and a system for dynamic coordination can realize dynamic adjustment of the RRU set corresponding to each BBU through the data exchange equipment, so that the RRU for coordinated transmission can be freely selected according to the requirement of practical application and the base station crossing uplink and downlink coordinated transmission of the UE can be realized.
Description
Technical field
The present invention relates to mobile communication technology, be specifically related to a kind of method and system of dynamic cooperative, and a kind of switch.
Background technology
At advanced long evolving system (Long Term Evolution-Advanced, LTE-A) in, adopt OFDM to insert (Orthogonal Frequency Divided Multiple access at present, OFDMA) technology, the OFDMA technology utilizes orthogonality between the frequency as distinguishing subscriber equipment (UserEquipment, UE) mode, by with the information-bearing of different UEs on mutually orthogonal different carrier, can effectively reduce the adverse effect that frequency selective fading is brought.The topological structure of the cellular network that uses in the current LTE-A system has been shown among Fig. 1, as shown in the figure, each base station covers a sector (being the sub-district), because the employed frequency of different UEs is mutually orthogonal in the sub-district, therefore, for the UE in certain sub-district, its all interference all comes from other sub-districts, thereby this mode can improve the Signal Interference and Noise Ratio (SINR) that is positioned at center of housing estate zone UE greatly, and obtains higher data rate and better service quality.And for the UE that is positioned at cell edge region, because it is nearer apart from neighbor cell, thereby take with other UE of the same carrier resource of this UE bigger in the neighbor cell to its interference, this UE itself is far away apart from this cell base station in addition, its SINR is less relatively, though cause the throughput of whole sub-district higher, it is relatively poor and throughput is lower to be positioned at its service quality of UE of cell edge region.
Distributed radio system has obtained the extensive concern and the research of industry as one of solution of the problems referred to above after the proposition.Distributing antenna system is a kind of new network framework, in LTE-A, be called multipoint cooperative (Coordinated Multiple Point again, CoMP) transmission, under this framework, radio frequency unit separates setting with other parts of base station, the antenna station of distributing antenna system only comprises radio frequency unit (Remote Radio Unit, RRU), a plurality of RRU give centralized baseband processing unit (the Base-band Unit that is positioned at the base station with digital medium-frequency signal by Optical Fiber Transmission, BBU), at this moment, the a plurality of RRU that belong to same BBU, can realize performance gain by the transmission/reception of uniting of RRU, the network architecture of described distributing antenna system as shown in Figure 2, its operation principle is: realize the signal of common certain UE of reception by the cooperation between a plurality of RRU and merge the signal that is received according to certain weighting scheme in up link; Perhaps, in down link, the signal that needs send to certain UE is distributed to a plurality of RRU according to certain weighting scheme by cooperation, launch to described UE respectively by the signal that described a plurality of RRU are assigned to it simultaneously, thereby improve the antijamming capability of the UE that is positioned at cell edge region, correspondingly improve service quality and the throughput of described UE, improve the availability of frequency spectrum of system.
With a real network framework as shown in Figure 2 is example, comprise 3 base stations (i.e. 3 BBU) in this network---be respectively BBU1, BBU2 and BBU3, wherein BBU1 comprises 3 antenna stations (i.e. 3 RRU), be called RRU1, RR2 and RRU3, BBU2 comprises RRU4 and RRU5, BBU3 then comprises RRU6 and RRU7, and the mutual alignment of establishing its each RRU in actual environment concerns as shown in Figure 3:
When UE was positioned at as shown in Figure 3 A place, position, preferably can select RRU1, RRU2 and RRU3 to the RRU set that this UE carries out the CoMP transmission this moment, and at this moment this UE can obtain higher transmission performance gain.When this UE moves to as shown in Figure 3 B place, position, draw easily according to the principle of CoMP, select this moment RRU2, RRU3, RRU4 and RRU5 that this UE is carried out the CoMP transmission, should have preferable transmission performance gain.Yet, because the existing distributed radio system belongs to static cooperative system, the corresponding relation of RRU and BBU is a static configuration and fixing, therefore only belong between each RRU of same BBU and can cooperate, thereby this moment is to being positioned at this UE at B place, position, if cooperate by the RRU under the BBU1, then can select RRU2 and RRU3, if and cooperate by the RRU under the BBU2, then can select RRU4 and RRU5, but all can't realize coming this UE is carried out the CoMP transmission by RRU2, RRU3, RRU4 and RRU5.
As seen, static corresponding relation can't realize striding the CoMP transmission of base station between existing RRU and the BBU, can't select the RRU cooperation set of its actual needs according to the particular location of UE in freedom and flexibility ground, thereby limit the communications performance of UE, be unfavorable for improving its service quality and throughput.
Summary of the invention
The invention provides a kind of method and system of dynamic cooperative, can realize striding the cooperation transmission of base station UE.
The invention provides a kind of switch, can realize the base station collaboration of striding of UE is transmitted.
Be first aspect that achieves the above object, technical scheme of the present invention specifically is achieved in that
A kind of method of dynamic cooperative, set in advance with network in all BBU and all RRU link to each other respectively and be used to transmit the switch of interaction data between BBU and the RRU, this method comprises:
Current BBU sends the request of measuring of eating dishes without rice or wine to the user equipment (UE) that is positioned at its cell range, and receives the measurement report that UE returns;
Determine cooperation RRU set and notification data switching equipment according to described measurement report;
RRU during switch is gathered the static RRU that does not belong to current BBU correspondence in the described cooperation RRU set is as the dynamic RRU set of current BBU correspondence, merge described static state and dynamically RRU set, obtain the set of all RRU of current BBU correspondence this moment, described static RRU gathers the set for the RRU composition of this BBU correspondence that sets in advance;
Current BBU carries out data interaction, the cooperation transmission of realization UE by switch all RRU corresponding with this BBU this moment.
Described current BBU is after the UE that is positioned at its cell range sends the step of the request of measuring of eating dishes without rice or wine, and before the step of the measurement report that reception UE returns, this method further comprises:
After UE receives and eats dishes without rice or wine to measure request, the designated cell parameter of its sub-district, place and each neighbor cell is measured and measurement report is returned to current BBU.
The method of determining cooperation RRU set according to described measurement report comprises:
The value of specifying cell parameter in the described measurement report is defined as initial cooperation set greater than the RRU of all sub-district correspondences of predetermined threshold value, and the target BBU under each RRU in initial cooperation set sends the cooperation request;
After described target BBU receives the cooperation request, judge whether to allow to cooperate, confirm response if allow then to reply cooperation to current BBU according to each the RRU present located state in the described initial cooperation set;
The cooperation that current BBU replys according to target BBU confirms that response obtains final cooperation RRU set.
Described current BBU carries out data interaction by switch all RRU corresponding with this BBU this moment, and the method for the cooperation transmission of realization UE comprises:
Current BBU sends to switch with the downlink data that needs send to UE, be distributed to each RRU of this BBU correspondence according to the set of all RRU of current BBU correspondence this moment by switch, and be handed down to UE simultaneously by each RRU of this BBU correspondence, realize down collaboration transmission to UE;
Perhaps, current BBU is with described final cooperation RRU set notice UE, the upstream data from UE that each RRU that comprises during described final cooperation RRU gathers will receive sends to switch, and described upstream data unification is transmitted to current BBU by switch, realize the uplink coordinated transmission of UE.
With not belonging to RRU in the static RRU set of current BBU correspondence in the described cooperation RRU set as the dynamic RRU set of current BBU correspondence, merge described static state and dynamically RRU set, the method that obtains the set of all corresponding RRU of current BBU this moment comprises:
Set in advance the data forwarding table and transmit in each clauses and subclauses represent a BBU, described each clauses and subclauses comprise static and dynamic two class parameters; Wherein, static parameter is expressed as the set that the BBU RRU predefined, this BBU correspondence of this clauses and subclauses representative forms, and the initial value of dynamic parameter be a sky;
With not belonging to RRU in the static RRU set of current BBU correspondence in the described cooperation RRU set, described dynamic RRU set is saved as the dynamic parameter of current BBU place clauses and subclauses in the data forwarding table as the dynamic RRU set of current BBU correspondence;
According to the static parameter and the dynamic parameter of current BBU place clauses and subclauses in the described data forwarding table, obtain the set of all RRU of current BBU correspondence this moment.
A kind of system of dynamic cooperative, this system comprises:
UE is used to receive the request of measuring of eating dishes without rice or wine that current BBU sends, and to current BBU return measurement report;
Current BBU is used for sending the request of measuring of eating dishes without rice or wine to the UE that is positioned at its cell range, and receives the measurement report that UE returns; Determine cooperation RRU set according to described measurement report, with the cooperation RRU set notification data switching equipment of determining, all RRUs corresponding with this BBU this moment by switch carry out data interaction, the cooperation transmission of realization UE;
Switch, link to each other respectively with all BBU in the network and all RRU, be used to receive the cooperation RRU set of current BBU notice, to not belong to RRU in the static RRU set of current BBU correspondence in the described cooperation RRU set as the dynamic RRU set of current BBU correspondence, merge described static state and dynamically RRU set, obtain the set of all RRU of current BBU correspondence this moment, described static RRU gathers the set for the RRU composition of this BBU correspondence that sets in advance; Also be used to transmit the data interaction between current BBU all RRU corresponding with this BBU this moment.
Further comprise target BBU in this system;
Target BBU after being used to receive the cooperation request of current BBU transmission, judges whether to allow to cooperate according to each the RRU present located state in the described initial cooperation set, confirms response if allow then to reply to cooperate to current BBU;
Current BBU, the value that is further used for specifying cell parameter in the described measurement report is defined as initial cooperation set greater than the RRU of all sub-district correspondences of predetermined threshold value, target BBU under each RRU in initial cooperation set sends the cooperation request, and confirms that according to the cooperation that target BBU replys response obtains final cooperation RRU set.
Described switch comprises: static RRU preserves module, dynamic RRU acquisition module and data forwarding module, and wherein static RRU preserves module and dynamic RRU acquisition module links to each other with data forwarding module respectively;
Static RRU preserves module, is used to preserve the static RRU set of each the BBU correspondence that sets in advance;
Dynamic RRU acquisition module is used to receive the cooperation RRU set of current BBU notice, and the RRU during the static RRU that does not belong to current BBU correspondence in the described cooperation RRU set is gathered is as the dynamic RRU set of current BBU correspondence;
Data forwarding module is used to receive the downlink data that current BBU sends to UE, is distributed to each RRU of this BBU correspondence according to the current BBU set of all corresponding RRU at this moment; Perhaps, unify to be transmitted to current BBU behind the upstream data that each RRU that comprises in the reception cooperation RRU set sends.
As seen from the above technical solutions, the method and system of this dynamic cooperative of the embodiment of the invention, by described switch is set, can realize dynamically adjusting to the pairing RRU set of each BBU, thereby broken the restriction that each BBU in the prior art can only comprise specific RRU, made the RRU that can freely select to carry out cooperation transmission according to the needs of practical application; Simultaneously, utilize described switch that the data between RRU and current BBU are transmitted, can carry out the data forwarding between BBU and the RRU according to the RRU of current BBU correspondence, thereby can realize UE is striden the up-downgoing cooperation transmission of base station.
Be second aspect that achieves the above object, technical scheme of the present invention specifically is achieved in that
All BBU and all RRU link to each other respectively in a kind of switch, this equipment and network, and this equipment comprises:
Static RRU preserves module, is used to preserve the static RRU set of each the BBU correspondence that sets in advance;
Dynamic RRU acquisition module is used to receive the cooperation RRU set of current BBU notice, and the RRU during the static RRU that does not belong to current BBU correspondence in the described cooperation RRU set is gathered is as the dynamic RRU set of current BBU correspondence;
Data forwarding module, it preserves module with static RRU and dynamic RRU acquisition module links to each other respectively, is used to receive the downlink data that current BBU sends to UE, is distributed to each RRU of this BBU correspondence according to the current BBU set of all corresponding RRU at this moment; Perhaps, unify to be transmitted to current BBU behind the upstream data that each RRU that comprises in the reception cooperation RRU set sends.
As seen from the above technical solutions, this switch of the embodiment of the invention, can realize dynamically adjusting to the pairing RRU set of each BBU, thereby broken the restriction that each BBU in the prior art can only comprise specific RRU, made the RRU that can freely select to carry out cooperation transmission according to the needs of practical application; Simultaneously, utilize described switch that the data between RRU and current BBU are transmitted, can carry out the data forwarding between BBU and the RRU according to the RRU of current BBU correspondence, thereby can realize UE is striden the up-downgoing cooperation transmission of base station.
Description of drawings
Fig. 1 is the topological structure schematic diagram of cellular network in the prior art.
Fig. 2 is the network architecture schematic diagram of distributing antenna system in the prior art.
Fig. 3 is the schematic diagram that the selection RRU of distributing antenna system in the prior art cooperates.
Fig. 4 is the schematic flow sheet of the method for dynamic cooperative in the embodiment of the invention.
Fig. 5 is the network architecture schematic diagram of the system of dynamic cooperative in the embodiment of the invention.
Fig. 6 is the execution mode schematic flow sheet of the method for dynamic cooperative in the embodiment of the invention.
Fig. 7 is the composition structural representation of the system of dynamic cooperative in the embodiment of the invention.
Fig. 8 is the composition structural representation of switch in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The embodiment of the invention provides a kind of method of dynamic cooperative, its flow process as shown in Figure 4, comprising:
Step 401: current BBU sends the request of measuring of eating dishes without rice or wine to the UE that is positioned at its cell range, and receives the measurement report that UE returns;
Step 402: determine cooperation RRU set and notification data switching equipment according to described measurement report;
Step 403: the RRU during switch is gathered the static RRU that does not belong to current BBU correspondence in the described cooperation RRU set is as the dynamic RRU set of current BBU correspondence, merge described static state and dynamically RRU set, obtain the set of all RRU of current BBU correspondence this moment, described static RRU gathers the set for the RRU composition of this BBU correspondence that sets in advance;
Step 404: current BBU carries out data interaction, the cooperation transmission of realization UE by switch all RRU corresponding with this BBU this moment.
The embodiment of the invention has newly been set up a data switching equipment between described BBU and RRU, the network architecture of the system of described dynamic cooperative as shown in Figure 5 at this moment, described switch links to each other with each BBU in the network on the one hand, link to each other with each RRU in the network on the other hand, realize the data forwarding between BBU and the RRU; Preserve the data forwarding table of setting up in advance in this equipment, this is transmitted and is used for describing the BBU of network and the corresponding relation of RRU, and this is transmitted and can be carried out static configuration in advance and on-the-fly modified by BBU in network operation process by network management or attendant.
In described transmitting, the corresponding relation of BBU and RRU can be described by the mode of list of entries, comprise a plurality of clauses and subclauses in described the transmitting, each clauses and subclauses is corresponding with a BBU in the network, and the information in these clauses and subclauses is used to explain the RRU set that can be used for cooperation transmission of this BBU correspondence.
When practical application, the information in each clauses and subclauses further comprises two class parameters:
One class parameter is static, and the RRU set that can be used for cooperation transmission of this promptly pre-configured BBU correspondence abbreviates static RRU set as;
Another kind of parameter is a dynamic item, promptly in network operation process, dynamically arrange by the BBU of this clauses and subclauses representative, other of current this BBU correspondence can be used for RRU set of cooperation transmission except described static RRU set, abbreviate dynamic RRU as and gather.
Understand easily, a static parameter manually is provided with before system comes into operation by network management or attendant, therefore, unless once more to the network setting of making amendment, otherwise it remains unchanged in network operation process.The dynamic item parameter all may be different when it being carried out cooperation transmission then along with the difference of UE position at every turn.Therefore, understand easily, when time setting of described data forwarding heading was finished, the initial value of a static parameter was not empty, and the initial value of dynamic item parameter is empty.Simultaneously; the implementation of described two class parameters also only is to a kind of giving an example of the present invention; do not represent to limit; those skilled in the art adopt according to prior art other pairing various other implementations that can be used for the RRU set of cooperation transmission of BBU can be described, all should be included within protection scope of the present invention.
By described switch is set, can realize dynamically adjusting to the pairing RRU set of each BBU, thereby broken the restriction that each BBU in the prior art can only comprise specific RRU, make and freely to select the RRU that carries out cooperation transmission to become possibility, also become possibility with regard to the feasible cooperation transmission that UE is striden the base station according to the needs of practical application.
Describe the present invention in order further to show below in conjunction with the method for a specific embodiment to above-mentioned dynamic cooperative, its flow process as shown in Figure 6, comprising:
Step 601: current BBU sends the request of measuring of eating dishes without rice or wine to the UE that is positioned at its cell range;
After step 602:UE receives and eats dishes without rice or wine to measure request, the designated cell parameter of its sub-district, place and each neighbor cell is measured and measurement report is returned to current BBU;
For the UE in the LTE-A system, described measurement report promptly is equivalent to Reference Signal Received Power (Reference Signal Receiving Power, RSRP) measurement report.
Step 603: the measurement report that current BBU replys according to UE is determined initial cooperation RRU set, and the target BBU under each RRU that comprises in initial cooperation RRU set sends the cooperation request;
Described measurement report of replying according to UE determines that the method for initial cooperation set can comprise:
The value of described designated cell parameter is defined as initial cooperation set greater than the RRU of all sub-district correspondences of setting threshold.For example, when if described designated cell parameter is cell power, preestablish power threshold, after then UE each cell power that will measure sends to current BBU by measurement report, current BBU just will be defined as initial cooperation set greater than the RRU of all sub-district correspondences of this power threshold.
After step 604: target BBU receives cooperation request, determine whether to allow to cooperate, confirm response if allow then to reply cooperation to current BBU according to each RRU present located state wherein;
Need to prove that described basis wherein each RRU present located state determines whether that the method that allows to cooperate can have multiple implementation, specifically can carry out, enumerate no longer one by one as space is limited according to strategy of the operator or the network planning etc.
Step 605: the cooperation that current BBU returns according to target BBU confirms that response obtains final cooperation RRU set, initiate modification according to described final cooperation RRU set to the exchanges data table in the data switching equipment---promptly, will not belong to RRU in the static RRU set of current BBU correspondence in the described final cooperation RRU set as the dynamic item of the clauses and subclauses of current BBU correspondence in the exchanges data table;
Step 606: switch returns the modification acknowledge message to current BBU after revising and finishing;
Owing in the step 605 the data forwarding table in the data switching equipment is revised, therefore after modification is finished, both included the static RRU set of initial setting in the clauses and subclauses of current BBU place, the script that need use when also comprising this cooperation transmission belongs to the dynamic RRU set of the RRU composition of other BBU---, under current state, described static RRU set and all RRU that dynamically comprise in the RRU set can be considered to belong to current BBU this moment, thereby just can transmit according to utilizing each RRU that belongs to a BBU to cooperate in the prior art to realize the method for uniting transmission/reception that UE is carried out CoMP;
Step 607: current BBU carries out data interaction, the cooperation transmission of realization UE by switch all RRU corresponding with this BBU this moment;
Concrete grammar comprises: current BBU sends to switch with the downlink data that needs send to UE, be distributed to each RRU of this BBU correspondence according to the set of all RRU of current BBU correspondence this moment by switch, and be handed down to UE simultaneously by each RRU of this BBU correspondence, realize down collaboration transmission to UE;
Perhaps, current BBU is with described final cooperation RRU set notice UE, the upstream data from UE that each RRU that comprises during described final cooperation RRU gathers will receive sends to switch, and described upstream data unification is transmitted to current BBU by switch, realize the uplink coordinated transmission of UE.
As seen, in the implementation method of above-mentioned steps 607, all exchanges data between RRU and BBU, all need forwarding through described switch, at this moment, described switch is equivalent to the function of router---and promptly, RRU is mail to the data that BBU or BBU mail to RRU transmit according to the data forwarding table.
The BBU1 that is initially set to that supposes network topology comprises RR1, RRU2 and three antenna stations of RRU3, BBU2 comprises RRU4 and two antenna stations of RRU5, BBU3 comprises RRU6 and two antenna stations of RRU7, and then this moment is as shown in table 1 below according to the data forwarding table that the embodiment of the invention is provided with:
| Static (RRU) | Dynamic item (RRU) | BBU |
| RRU1，RRU2，RRU3 | BBU1 | |
| RRU4，RRU5 | BBU2 | |
| RRU6，RRU7 | BBU3 |
Table 1
Supposing has a UE to be positioned at the coverage of RRU2 this moment, and this UE is current area with RRU2, be current BBU with BBU1; The measurement report of eating dishes without rice or wine that UE will measure sends to BBU1, if the parameter of measuring is a cell power, measurement report can comprise RRU2 so, RRU3, and RRU1, RRU4 and RRU5 be corresponding district power separately; BBU1 receives this report, establishes this moment and gets a power threshold, and the cell power that is higher than this threshold value will be included into this mobile subscriber's cooperation RRU set.Suppose BBU1 chosen RRU2, RRU3, RRU1, RRU4} are as cooperation set, BBU1 will send signaling and revise transmitting in the switch so.It is as follows to transmit the modification back:
| Static (RRU) | Dynamic item (RRU) | BBU |
| RRU1，RRU2，RRU3 | RRU4 | BBU1 |
| RRU4，RRU5 | BBU2 | |
| RRU6，RRU7 | BBU3 |
Table 2
Subsequently, establish this UE and move to RRU5, then be current area with RR5 this moment, thereby BBU2 is current BBU, and the measurement report that establish UE this moment is { RRU5, RRU4, RRU3, RRU2, RRU1}.If BBU2 for the cooperation set that this UE selects be RRU5, RRU4, RRU3, RRU2}, so corresponding BBU2 will transmit and be revised as:
| Static (RRU) | Dynamic item (RRU) | BBU |
| RRU1，RRU2，RRU3 | BBU1 | |
| RRU4，RRU5 | RRU2，RRU3 | BBU2 |
| RRU6，RRU7 | BBU3 |
Table 3
The embodiment of the invention also provides a kind of system of dynamic cooperative, and it forms structure as shown in Figure 7, comprising: UE710, current BBU720 and switch 730;
UE710 is used to receive the request of measuring of eating dishes without rice or wine that current BBU720 sends, and to current BBU720 return measurement report;
Current BBU720 is used for sending the request of measuring of eating dishes without rice or wine to the UE that is positioned at its cell range, and receives the measurement report that UE returns; Determine cooperation RRU set according to described measurement report, with the cooperation RRU set notification data switching equipment of determining 730, all RRUs corresponding with this BBU this moment by switch 730 carry out data interaction, the cooperation transmission of realization UE;
Preferably, also further comprise target BBU740 in the described system;
At this moment, described current BBU720, the value that is further used for specifying cell parameter in the described measurement report is defined as initial cooperation set greater than the RRU of all sub-district correspondences of predetermined threshold value, target BBU under each RRU in initial cooperation set sends the cooperation request, and confirms that according to the cooperation that target BBU740 replys response obtains final cooperation RRU set;
Described target BBU740 after being used to receive the cooperation request of current BBU720 transmission, judges whether to allow to cooperate according to each the RRU present located state in the described initial cooperation set, confirms response if allow then to reply to cooperate to current BBU720.
Wherein, described switch 730 comprises: static RRU preserves module 731, dynamically RRU acquisition module 732 and data forwarding module 733; Described static RRU preserves module 731 and links to each other with data forwarding module 733 respectively with dynamic RRU acquisition module 732;
Described static RRU preserves module 731, is used to preserve the static RRU set of this BBU correspondence that sets in advance;
Described dynamic RRU acquisition module 732 is used to receive the cooperation RRU set of current BBU720 notice, and the RRU during the static RRU that does not belong to current BBU720 correspondence in the described cooperation RRU set is gathered is as the dynamic RRU set of current BBU720 correspondence;
Described data forwarding module 733 is used to receive the downlink data that current BBU720 sends to UE710, is distributed to each RRU of this BBU correspondence according to the current BBU720 set of all corresponding RRU at this moment; Perhaps, unify to be transmitted to current BBU720 behind the upstream data that each RRU that comprises in the reception cooperation RRU set sends.
By as seen above-mentioned, the method and system of the dynamic cooperative that the embodiment of the invention provides, by described switch is set, can realize dynamically adjusting to the pairing RRU set of each BBU, thereby broken the restriction that each BBU in the prior art can only comprise specific RRU, made the RRU that can freely select to carry out cooperation transmission according to the needs of practical application; Simultaneously, utilize described switch that the data between RRU and current BBU are transmitted, thereby can realize UE is striden the up-downgoing cooperation transmission of base station.
At last, the embodiment of the invention also provides a kind of switch, and it forms structure as shown in Figure 8, comprising: static RRU preserves module 810, dynamically RRU acquisition module 820 and data forwarding module 830; Described static RRU preserves module 810 and links to each other with data forwarding module 830 respectively with dynamic RRU acquisition module 820;
Wherein, described static RRU preserves module 810, is used to preserve the static RRU set of this BBU correspondence that sets in advance;
Described dynamic RRU acquisition module 820 is used to receive the cooperation RRU set of current BBU notice, and the RRU during the static RRU that does not belong to current BBU correspondence in the described cooperation RRU set is gathered is as the dynamic RRU set of current BBU correspondence;
Described data forwarding module 830 is used to receive the downlink data that current BBU sends to UE, is distributed to each RRU of this BBU correspondence according to the current BBU set of all corresponding RRU at this moment; Perhaps, unify to be transmitted to current BBU behind the upstream data that each RRU that comprises in the reception cooperation RRU set sends.
By as seen above-mentioned, the switch that the embodiment of the invention provides, can realize dynamically adjusting to the pairing RRU set of each BBU, thereby broken the restriction that each BBU in the prior art can only comprise specific RRU, made the RRU that can freely select to carry out cooperation transmission according to the needs of practical application; Simultaneously, utilize described switch that the data between RRU and current BBU are transmitted, thereby can realize UE is striden the up-downgoing cooperation transmission of base station.
Claims (9)
1. the method for a dynamic cooperative is characterized in that, set in advance with network in all centralized baseband processing unit BBU and all radio frequency unit RRU link to each other respectively and be used to transmit the switch of interaction data between BBU and the RRU, this method comprises:
Current BBU sends the request of measuring of eating dishes without rice or wine to the user equipment (UE) that is positioned at its cell range, and receives the measurement report that UE returns;
Determine cooperation RRU set and notification data switching equipment according to described measurement report;
RRU during switch is gathered the static RRU that does not belong to current BBU correspondence in the described cooperation RRU set is as the dynamic RRU set of current BBU correspondence, merge described static state and dynamically RRU set, obtain the set of all RRU of current BBU correspondence this moment, described static RRU gathers the set for the RRU composition of this BBU correspondence that sets in advance;
Current BBU carries out data interaction, the cooperation transmission of realization UE by switch all RRU corresponding with this BBU this moment.
2. method according to claim 1 is characterized in that, described current BBU is after the UE that is positioned at its cell range sends the step of the request of measuring of eating dishes without rice or wine, and before the step of the measurement report that reception UE returns, this method further comprises:
After UE receives and eats dishes without rice or wine to measure request, the designated cell parameter of its sub-district, place and each neighbor cell is measured and measurement report is returned to current BBU.
3. method according to claim 2 is characterized in that, determines that according to described measurement report the method for cooperation RRU set comprises:
The value of specifying cell parameter in the described measurement report is defined as initial cooperation set greater than the RRU of all sub-district correspondences of predetermined threshold value, and the target BBU under each RRU in initial cooperation set sends the cooperation request;
After described target BBU receives the cooperation request, judge whether to allow to cooperate, confirm response if allow then to reply cooperation to current BBU according to each the RRU present located state in the described initial cooperation set;
The cooperation that current BBU replys according to target BBU confirms that response obtains final cooperation RRU set.
4. method according to claim 3 is characterized in that, described current BBU carries out data interaction by switch all RRU corresponding with this BBU this moment, and the method for the cooperation transmission of realization UE comprises:
Current BBU sends to switch with the downlink data that needs send to UE, be distributed to each RRU of this BBU correspondence according to the set of all RRU of current BBU correspondence this moment by switch, and be handed down to UE simultaneously by each RRU of this BBU correspondence, realize down collaboration transmission to UE;
Perhaps, current BBU is with described final cooperation RRU set notice UE, the upstream data from UE that each RRU that comprises during described final cooperation RRU gathers will receive sends to switch, and described upstream data unification is transmitted to current BBU by switch, realize the uplink coordinated transmission of UE.
5. according to each described method in the claim 1 to 4, it is characterized in that, to not belong to RRU in the static RRU set of current BBU correspondence in the described cooperation RRU set as the dynamic RRU set of current BBU correspondence, merge described static state and dynamically RRU set, the method that obtains the set of all corresponding RRU of current BBU this moment comprises:
Set in advance the data forwarding table and transmit in each clauses and subclauses represent a BBU, described each clauses and subclauses comprise static and dynamic two class parameters; Wherein, static parameter is expressed as the set that the BBU RRU predefined, this BBU correspondence of this clauses and subclauses representative forms, and the initial value of dynamic parameter be a sky;
With not belonging to RRU in the static RRU set of current BBU correspondence in the described cooperation RRU set, described dynamic RRU set is saved as the dynamic parameter of current BBU place clauses and subclauses in the data forwarding table as the dynamic RRU set of current BBU correspondence;
According to the static parameter and the dynamic parameter of current BBU place clauses and subclauses in the described data forwarding table, obtain the set of all RRU of current BBU correspondence this moment.
6. the system of a dynamic cooperative is characterized in that, this system comprises:
UE is used to receive the request of measuring of eating dishes without rice or wine that current BBU sends, and to current BBU return measurement report;
Current BBU is used for sending the request of measuring of eating dishes without rice or wine to the UE that is positioned at its cell range, and receives the measurement report that UE returns; Determine cooperation RRU set according to described measurement report, with the cooperation RRU set notification data switching equipment of determining, all RRUs corresponding with this BBU this moment by switch carry out data interaction, the cooperation transmission of realization UE;
Switch, link to each other respectively with all BBU in the network and all RRU, be used to receive the cooperation RRU set of current BBU notice, to not belong to RRU in the static RRU set of current BBU correspondence in the described cooperation RRU set as the dynamic RRU set of current BBU correspondence, merge described static state and dynamically RRU set, obtain the set of all RRU of current BBU correspondence this moment, described static RRU gathers the set for the RRU composition of this BBU correspondence that sets in advance; Also be used to transmit the data interaction between current BBU all RRU corresponding with this BBU this moment.
7. system according to claim 6 is characterized in that, further comprises target BBU in this system;
Target BBU after being used to receive the cooperation request of current BBU transmission, judges whether to allow to cooperate according to each the RRU present located state in the described initial cooperation set, confirms response if allow then to reply to cooperate to current BBU;
Current BBU, the value that is further used for specifying cell parameter in the described measurement report is defined as initial cooperation set greater than the RRU of all sub-district correspondences of predetermined threshold value, target BBU under each RRU in initial cooperation set sends the cooperation request, and confirms that according to the cooperation that target BBU replys response obtains final cooperation RRU set.
8. according to claim 6 or 7 described systems, it is characterized in that, described switch comprises: static RRU preserves module, dynamic RRU acquisition module and data forwarding module, and wherein static RRU preserves module and dynamic RRU acquisition module links to each other with data forwarding module respectively;
Static RRU preserves module, is used to preserve the static RRU set of each the BBU correspondence that sets in advance;
Dynamic RRU acquisition module is used to receive the cooperation RRU set of current BBU notice, and the RRU during the static RRU that does not belong to current BBU correspondence in the described cooperation RRU set is gathered is as the dynamic RRU set of current BBU correspondence;
Data forwarding module is used to receive the downlink data that current BBU sends to UE, is distributed to each RRU of this BBU correspondence according to the current BBU set of all corresponding RRU at this moment; Perhaps, unify to be transmitted to current BBU behind the upstream data that each RRU that comprises in the reception cooperation RRU set sends.
9. a switch is characterized in that, all BBU and all RRU link to each other respectively in this equipment and the network, and this equipment comprises:
Static RRU preserves module, is used to preserve the static RRU set of each the BBU correspondence that sets in advance;
Dynamic RRU acquisition module is used to receive the cooperation RRU set of current BBU notice, and the RRU during the static RRU that does not belong to current BBU correspondence in the described cooperation RRU set is gathered is as the dynamic RRU set of current BBU correspondence;
Data forwarding module, it preserves module with static RRU and dynamic RRU acquisition module links to each other respectively, is used to receive the downlink data that current BBU sends to UE, is distributed to each RRU of this BBU correspondence according to the current BBU set of all corresponding RRU at this moment; Perhaps, unify to be transmitted to current BBU behind the upstream data that each RRU that comprises in the reception cooperation RRU set sends.
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