CN102932937B - Method for dispatching user facility in cellular communication system and equipment - Google Patents

Method for dispatching user facility in cellular communication system and equipment Download PDF

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Publication number
CN102932937B
CN102932937B CN201110230272.7A CN201110230272A CN102932937B CN 102932937 B CN102932937 B CN 102932937B CN 201110230272 A CN201110230272 A CN 201110230272A CN 102932937 B CN102932937 B CN 102932937B
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China
Prior art keywords
subscriber equipment
scheduling
user device
base station
device set
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CN201110230272.7A
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CN102932937A (en
Inventor
张晓博
孙欢
赵岩
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Nokia Shanghai Bell Co Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
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Priority to CN201110230272.7A priority Critical patent/CN102932937B/en
Priority to PCT/IB2012/001888 priority patent/WO2013021281A2/en
Priority to TW101129253A priority patent/TWI452921B/en
Publication of CN102932937A publication Critical patent/CN102932937A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H04W16/16—Spectrum sharing arrangements between different networks for PBS [Private Base Station] arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Abstract

Provide a kind of in the cellular communication system based on collaborative multi-point joint transmission to the method that subscriber equipment is dispatched, wherein cellular communication system comprises macro base station and micro-base station, macro base station performs the first scheduling to serve first user cluster tool, micro-base station performs the second scheduling to serve the second user device set, and the method comprises: determine adjustment information according to the first scheduling and the second scheduling; And send adjustment information to micro-base station, so that the data that adjustment will send to the subscriber equipment in the second user device set.

Description

Method for dispatching user facility in cellular communication system and equipment
Technical field
The present invention relates to the communications field, particularly in the cellular communication system based on collaborative multi-point joint transmission to the method and apparatus that subscriber equipment is dispatched.
Background technology
In a cellular communication system, the subscriber equipment being positioned at cell boarder usually can be more weak and suffer the interference of other cell signal because of signal, and cause signal quality poor.In order to realize the requirement of LTE-A in power system capacity, instantaneous peak value data rate, frequency spectrum, cell edge user throughput and time delay etc., propose collaborative multiple spot (CoordinationMulti-Point, CoMP) technology to improve systematic function at present.
Generally speaking, CoMP technology can be divided into two classes according to the difference of data processing method: a class is coordinated scheduling/coordinates beam shaping (CoordinatedScheduling/CoordinatedBeamforming, be called for short CS/CB) technology, another kind of is joint transmission (JointTransmission is called for short JT) technology.
At present, CoMP technology is mainly divided into four kinds of application scenarioss.The CoMP technology being applied to the first and the second application scenarios had been discussed for the first stage of CoMP at 3GPP, and the CoMP technology being applied to the third and the 4th kind of application scenarios is then widely note and be in question.CoMP under the third and the 4th kind of application scenarios belongs to the CoMP of (inter-site) between website substantially, and it has strict backhaul (backhaul)/synchronous/complexity requirement.If adopt JTCoMP technology, general satisfaction not these strict requirements, what therefore usually adopt is CS/CBCoMP technology.
But CS/CBCoMP technology is generally applicable to FDD system, for TDD system then and improper.Therefore need one both can be applicable to FDD system, be applicable to TDD system again, and the solution of the strict demand of inter-siteCoMP technology can be met simultaneously.
Summary of the invention
For above problem, the invention provides a kind of solution of in the cellular communication system based on collaborative multiple spot (CoMP) joint transmission (JT), subscriber equipment being dispatched, it can be applicable to FDD system and TDD system, and can meet the strict demand of inter-siteCoMP technology simultaneously.
According to a first aspect of the invention, provide a kind of in the cellular communication system based on collaborative multi-point joint transmission to the method that subscriber equipment is dispatched, wherein cellular communication system comprises macro base station and micro-base station, macro base station performs the first scheduling to serve first user cluster tool, micro-base station performs the second scheduling to serve the second user device set, and the method comprises: determine adjustment information according to the first scheduling and the second scheduling; And send adjustment information to micro-base station, so that the data that adjustment will send to the subscriber equipment in the second user device set.
According to a second aspect of the invention, provide a kind of in the cellular communication system based on collaborative multi-point joint transmission to the method that subscriber equipment is dispatched, wherein cellular communication system comprises macro base station and micro-base station, macro base station performs the first scheduling to serve first user cluster tool, micro-base station performs the second scheduling to serve the second user device set, the method comprises: receive adjustment information from macro base station, and wherein adjustment information is determined according to the first scheduling and the second scheduling; And the data that will send to the subscriber equipment in the second user device set are adjusted based on adjustment information.
According to a third aspect of the invention we, provide a kind of in the cellular communication system based on collaborative multi-point joint transmission to the equipment that subscriber equipment is dispatched, wherein cellular communication system comprises macro base station and micro-base station, macro base station performs the first scheduling to serve first user cluster tool, micro-base station performs the second scheduling to serve the second user device set, this equipment comprises: adjustment information determining device, is arranged to and determines adjustment information according to the first scheduling and the second scheduling; And dispensing device, be arranged to and send adjustment information to micro-base station, so that the data that adjustment will send to the subscriber equipment in the second user device set.
According to a forth aspect of the invention, provide a kind of in the cellular communication system based on collaborative multi-point joint transmission to the equipment that subscriber equipment is dispatched, wherein cellular communication system comprises macro base station and micro-base station, macro base station performs the first scheduling to serve first user cluster tool, micro-base station performs the second scheduling to serve the second user device set, this equipment comprises: receiving system, be arranged to and receive adjustment information from macro base station, wherein adjustment information is determined according to the first scheduling and the second scheduling; And adjusting device, be arranged to and adjust the data that will send to the subscriber equipment in the second user device set based on adjustment information.
By the description of the following preferred implementation to the explanation principle of the invention, and by reference to the accompanying drawings, other features of the present invention and advantage will be apparent.
Accompanying drawing explanation
By below in conjunction with the description of the drawings, and understand more comprehensively along with to of the present invention, other objects of the present invention and effect will become clearly and easy to understand, wherein:
Fig. 1 be according to an embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission the flow chart to the method that subscriber equipment is dispatched;
Fig. 2 be according to another embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission to the flow chart of the method that subscriber equipment is dispatched;
Fig. 3 be according to an embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission the block diagram to the equipment that subscriber equipment is dispatched;
Fig. 4 be according to an embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission the flow chart to the method that subscriber equipment is dispatched;
Fig. 5 be according to another embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission to the flow chart of the method that subscriber equipment is dispatched; And
Fig. 6 be according to an embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission the block diagram to the equipment that subscriber equipment is dispatched.
In all above-mentioned accompanying drawings, identical label represents to have identical, similar or corresponding feature or function.
Embodiment
Below in conjunction with accompanying drawing embodiments of the present invention be explained in more detail and illustrate.Should be appreciated that drawings and Examples of the present invention only for exemplary effect, not for limiting the scope of the invention.
Flow chart in accompanying drawing and block diagram, illustrate according to the architectural framework in the cards of the system of the various execution mode of the present invention, method and apparatus, function and operation.In this, each square frame in flow chart or block diagram can represent a part for module, program segment or a code, and a part for described module, program segment or code comprises one or more executable instruction for realizing the logic function specified.Also it should be noted that at some as in alternative realization, the function marked in square frame also can be different from occurring in sequence of marking in accompanying drawing.Such as, in fact the square frame that two adjoining lands represent can perform substantially concurrently, and they also can perform by contrary order sometimes, and this determines according to involved function.Also it should be noted that, the combination of the square frame in each square frame in block diagram and/or flow chart and block diagram and/or flow chart, can realize by the special hardware based system of the function put rules into practice or operation, or can realize with the combination of specialized hardware and computer instruction.Should be appreciated that drawings and Examples of the present invention only for exemplary effect, not for limiting the scope of the invention.Below in conjunction with accompanying drawing the present invention be explained in more detail and illustrate.
In the present invention, subscriber equipment (UE) can be various types of terminal, such as mobile phone, personal digital assistant (PDA), portable computer etc.Base station can be such as eNodeB or eNB etc.Macro base station can be such as grand eNB (MacroeNB), and it such as can produce macrocell (MacroCell).Micro-base station can be such as micro-eNB (MicroeNB) or slight eNB (PicoeNB), and it such as can produce Microcell (MicroCell) or picocell (PicoCell).
It should be noted, although the present invention mainly employs the example of PicoeNB as micro-base station, this is only exemplary, and any other example suitably can be used completely to realize technical scheme of the present invention.
The present invention mainly study in Release11 in the cellular communication system based on collaborative multi-point joint transmission to the scheduling of subscriber equipment.According to one embodiment of present invention, the subscriber equipment service of micro-base station only to oneself, such as, PicoeNB only serves PicoUE; Macro base station both can also can to the subscriber equipment service of micro-base station to the subscriber equipment service of oneself, and such as, MacroeNB both can serve MacroUE also can serve PicoUE; And (Intra-site) grand CoMP can carry out in website, it does not affect the solution of the present invention and implements.According to another embodiment of the invention, except as described in above-described embodiment, macrocell do not change Microcell scheduling of resource result and with the coding number of plies, and macrocell can determine MCS (Modulation and Coding Scheme) and/or demodulated reference signal (DMRS).According to still another embodiment of the invention, except as described in above-mentioned two embodiments, when macrocell to the respective user equipment in Microcell (such as, one or more PicoUE) time, Microcell can adjust (such as to sending to the data of this UE, excute phase rotates) realize the relevant merging of signal, thus realize the enhancing to data-signal.
Fig. 1 be according to an embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission the flow chart to the method that subscriber equipment is dispatched.Embodiment shown in Fig. 1 can by the macro base station in cellular communication system or those skilled in the art can other any suitable equipment perform.
Cellular communication system in embodiment shown in Fig. 1 comprises macro base station and micro-base station, and wherein macro base station performs the first scheduling to serve first user cluster tool, and micro-base station performs the second scheduling to serve the second user device set.
In step S101, determine adjustment information according to the first scheduling and the second scheduling, wherein the first scheduling is performed to serve first user cluster tool by macro base station, and the second scheduling is performed by micro-base station to serve the second user device set.
According to one embodiment of present invention, can obtain for the first channel matrix of the subscriber equipment in first user cluster tool and the first pre-coding matrix according to the result of the first scheduling, and obtain for the second channel matrix of the subscriber equipment in the second user device set and the second pre-coding matrix according to the result of the second scheduling, then determine adjustment information based on the first pre-coding matrix, the first channel matrix, the second pre-coding matrix and second channel matrix.
According to another embodiment of the invention, determine that this process of adjustment information can be realized by following steps based on the first pre-coding matrix, the first channel matrix, the second pre-coding matrix and second channel matrix: from the first pre-coding matrix, select the sub-pre-coding matrix corresponding with the second pre-coding matrix; The sub-channel matrix corresponding with second channel matrix is selected from the first channel matrix; And according to the second pre-coding matrix, second channel matrix, sub-pre-coding matrix and sub-channel matrix, calculate phase place adjustment matrix using as adjustment information.
According to one embodiment of present invention, the result of the second scheduling can comprise: the channel condition information (CSI) of channel between the subscriber equipment in micro-base station and the second user device set.Channel condition information is the information relevant with the channel status between receiver and transmitter.Channel condition information can comprise CQI (CQI), pre-coding matrix index (PMI), matter designator (RI) etc.The existing multiple method of this area can be utilized, determine corresponding channel matrix and pre-coding matrix according to this channel condition information.
According to one embodiment of present invention, it is one or more that the result of the second scheduling can comprise in the following:
● the CSI of channel between the subscriber equipment in micro-base station and the second user device set,
● the subscriber equipment sequence number in the second user device set,
● the precoding number of plies of the subscriber equipment in the second user device set,
● be the resource that the subscriber equipment in the second user device set distributes, and
● demodulated reference signal (DMRS).
According to one embodiment of present invention, the precoding number of plies of subscriber equipment can be determined by macro base station, and the result of now the second scheduling can not comprise this content.According to one embodiment of present invention, DMRS also can be determined by macro base station, and the result of now the second scheduling also can not comprise this content.
According to one embodiment of present invention, the result of the second scheduling receives from micro-base station.
In step S102, send adjustment information to micro-base station, so that the data that adjustment will send to the subscriber equipment in described second user device set.
According to one embodiment of present invention, except the adjustment information can determined to micro-base station forwarding step S201, what can also send in the following to micro-base station is one or more:
● selected Modulation and Coding Scheme, and
● will from described micro-base station to the data of the user device transmissions described second user device set.
According to one embodiment of present invention, based on the capacity of the subscriber equipment in the capacity of the subscriber equipment in adjustment information, first user cluster tool and the second user device set, the subscriber equipment that will carry out serving can also be selected from first user cluster tool and the second user device set to the method that subscriber equipment is dispatched in the cellular communication system based on collaborative multi-point joint transmission.
According to one embodiment of present invention, from first user cluster tool and the second user device set, select this process of subscriber equipment will carrying out serving can be realized by following: first according to the capacity of the subscriber equipment in adjustment information and the second user device set, obtain the adjustment capacity of the subscriber equipment in the second user device set; Then, the capacity of the subscriber equipment in first user cluster tool can be obtained according to the first scheduling; Afterwards, based on the adjustment capacity of the subscriber equipment in the capacity of the subscriber equipment in first user cluster tool and the second user device set, the subscriber equipment that will carry out serving can be selected.
Then, the flow process of Fig. 1 terminates.
Fig. 2 be according to another embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission to the flow chart of the method that subscriber equipment is dispatched.Embodiment shown in Fig. 2 can by the macro base station in cellular communication system or those skilled in the art can other any suitable equipment perform.
Similar with the embodiment shown in Fig. 1, cellular communication system in embodiment shown in Fig. 2 also comprises macro base station and micro-base station, wherein macro base station performs the first scheduling to serve first user cluster tool, and micro-base station performs the second scheduling to serve the second user device set.
In step S201, according to the result of the first scheduling, obtain the first channel matrix for the subscriber equipment in first user cluster tool and the first pre-coding matrix.
In the present embodiment, first scheduling is performed by macro base station, by performing the first scheduling, the subscriber equipment that macro base station such as can know oneself (such as, UE1, UE2, UE3, UE4 and UE5) respectively there are how many capacity, and from these subscriber equipmenies, select one group of subscriber equipment (such as, that selection is UE1 and UE2) to serve.First scheduling can come according to multiple method as known in the art.This group subscriber equipment that macro base station is dispatched by execution first and carried out serving is called first user cluster tool.In this example, first user cluster tool comprises two subscriber equipmenies, is UE1 and UE2 respectively.
By the first scheduling, channel matrix and the pre-coding matrix of channel between macro base station and its subscriber equipment of serving can be obtained by multiple prior art or method.Such as, macro base station can obtain the CSI of channel, then obtains channel matrix according to CSI, and can obtain pre-coding matrix by utilizing the algorithms most in use of this area.These algorithms most in use can be such as SVD decomposition algorithm, ZeroForcing (ZF) algorithm, BlockDiagonal (BD) algorithm etc.
Distinguish for the ease of the channel matrix that obtains with micro-base station and pre-coding matrix, the channel matrix for the subscriber equipment in first user cluster tool obtained according to the result of the first scheduling and pre-coding matrix are called the first channel matrix and the first pre-coding matrix.
In the embodiment shown in Figure 2, suppose that macro base station has 24 antennas, it comprises 3 macrocells, and wherein each macrocell has 8 antennas; Suppose that micro-base station has 8 antennas; Further, suppose that subscriber equipment has 2 antennas.When being K UE service after macro base station execution first scheduling, will be designated as the first channel matrix, the channel matrix between its UE and 3 macrocell that to be K served by macro base station; And will be designated as the first pre-coding matrix, wherein k represents kth UE, the L in K UE kit is the number of plies of a kth UE.
In step S202, receive the result of the second scheduling from micro-base station.
Second scheduling is performed by micro-base station.By performing the second scheduling, the subscriber equipment that oneself such as can be known in micro-base station (such as, UE6, UE7, UE8, UE9 and UE10) respectively there are how many capacity, and from these subscriber equipmenies, select one group of subscriber equipment (such as, that selection is UE6 and UE7) to serve.Second scheduling can come according to multiple method as known in the art.This group subscriber equipment that micro-base station is dispatched by execution second and carried out serving is called the second user device set.In this example, the second user device set comprises two subscriber equipmenies, is UE6 and UE7 respectively.
Dispatch similar with first, the CSI of channel between micro-base station and the second user device set (that is, micro-base station serve subscriber equipment) can be obtained by the second scheduling.According to one embodiment of present invention, comprise the CSI of channel between the subscriber equipment the micro-base station of reception and the second user device set from the result of micro-base station reception second scheduling.
According to another embodiment of the invention, the result comprising following the second scheduling one of at least can also be received from micro-base station: the precoding number of plies of the subscriber equipment sequence number the second user device set, the subscriber equipment in the second user device set, the resource of distributing for the subscriber equipment in the second user device set and demodulated reference signal.
In step S203, according to the result of the second scheduling, obtain the second channel matrix for the subscriber equipment in the second user device set and the second pre-coding matrix.
As previously mentioned, according to the CSI of channel between the subscriber equipment that micro-base station and its are served, corresponding channel matrix can be obtained; Then, corresponding pre-coding matrix can be obtained by utilizing the algorithms most in use of this area.
Distinguish for the ease of the channel matrix that obtains with macro base station and pre-coding matrix, the channel matrix for the subscriber equipment in the second user device set obtained according to the result of the second scheduling and pre-coding matrix are called second channel matrix and the second pre-coding matrix.
In the embodiment shown in Figure 2, supposing that the second scheduling is carried out in micro-base station is P UE service afterwards, then the channel matrix (that is, second channel matrix) between this P UE and micro-base station is designated as and the second pre-coding matrix is designated as wherein p represents p UE in P UE, L prepresent the number of plies of p UE.
In step S204, from the first pre-coding matrix, select the sub-pre-coding matrix corresponding with the second pre-coding matrix.
In the embodiment shown in Figure 2, from the first pre-coding matrix the sub-pre-coding matrix that middle selection is corresponding with the second pre-coding matrix, then selected sub-pre-coding matrix has the dimension identical with the second pre-coding matrix, and namely line number is equal respectively with columns.In the present embodiment, will from the first pre-coding matrix the sub-pre-coding matrix of middle selection is
In step S205, from the first channel matrix, select the sub-channel matrix corresponding with second channel matrix.
In the embodiment shown in Figure 2, from the first channel matrix the sub-channel matrix that middle selection is corresponding with second channel matrix, then selected sub-channel matrix has the dimension identical with second channel matrix, and namely line number is equal respectively with columns.In the present embodiment, will from the first channel matrix the sub-channel matrix of middle selection is
In step S206, according to the second pre-coding matrix, second channel matrix, sub-pre-coding matrix and sub-channel matrix, calculate phase place adjustment matrix.
According to one embodiment of present invention, phase place adjustment matrix (is such as designated as M adjust) be a diagonal matrix, its diagonal entry is designated as respectively then this phase place adjustment matrix can be expressed as
M Adjust = diagonal ( θ 1 θ 2 . . . θ Σ p = 1 P L p ) .
Therefore, in step S206, need to calculate each diagonal entry in this phase place adjustment matrix.In one implementation, each diagonal entry can be calculated by following formula (1):
θ s = - 1 * angle ( H precoding macro ( : , s ) ′ · H precoding pico ( : , s ) ) - - - ( 1 )
In formula (1), all row elements of s row in " (:, s) " representing matrix; symbol " ' " afterwards represents conjugate transpose; Angle computing is asked in " angle " expression.
In formula (1) with can through type (2) and (3) calculate:
H precoding macro = H 2 P × 24 Macro · W 24 × ( Σ p = 1 P L p ) Macro , - - - ( 2 )
H precoding pico = H 2 P × 24 pico · W 24 × ( Σ p = 1 P L p ) pico . - - - ( 3 )
In step S207, send adjustment information to micro-base station.
In step S208, according to the capacity of the subscriber equipment in adjustment information and the second user device set, obtain the adjustment capacity of the subscriber equipment in the second user device set.
According to one embodiment of present invention, suppose that the kth UE in second user's set is dispatched by macro base station, then can through type (4) calculate when dispatching the second user device set in the capacity of subscriber equipment
C m + p k = f { H 2 P × 8 Pico · W 8 × Σ p = 1 P L p Pico · diagonal ( θ 1 θ 2 . . . θ Σ p = 1 P L p ) } - - - ( 4 )
In formula (4), " f " represents and carries out certain computing (such as, take the logarithm, etc.), to obtain corresponding place capacity according to knowledge known in the art or technology.Then, by inciting somebody to action deduct the capacity of this kth UE when carrying out the second scheduling thus this kth UE can be obtained not only to have been dispatched by macro base station but also by available capacity during micro-base station scheduling:
C k = C m + p k - C p k . - - - ( 5 )
In this embodiment, adjustment capacity i.e. this available capacity C of the subscriber equipment in the second user device set k.
In step S209, obtain the capacity of the subscriber equipment in first user cluster tool according to the first scheduling.
As previously mentioned, the first scheduling is performed by macro base station.In the implementation of the first scheduling, the capacity of the subscriber equipment in first user cluster tool can be obtained according to the existing multiple method in this area.
In step S210, based on the adjustment capacity of the subscriber equipment in the capacity of the subscriber equipment in first user cluster tool and the second user device set, select the subscriber equipment that will carry out serving.
Then, the flow process of Fig. 2 terminates.
Fig. 3 be according to an embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission the block diagram to the equipment 300 that subscriber equipment is dispatched.Equipment 300 shown in Fig. 3 can macro base station in a cellular communication system or those skilled in the art can other any suitable equipment in realize.
Cellular communication system in embodiment shown in Fig. 3 comprises macro base station and micro-base station, and wherein macro base station performs the first scheduling to serve first user cluster tool, and micro-base station performs the second scheduling to serve the second user device set.
According to one embodiment of present invention, equipment 300 can comprise: adjustment information determining device 310, and it can be arranged to determines adjustment information according to the first scheduling and the second scheduling; And dispensing device 320, it can be arranged to and send adjustment information to micro-base station, so that the data that adjustment will send to the subscriber equipment in the second user device set.
According to one embodiment of present invention, adjustment information determining device 310 can comprise: for the result according to the first scheduling, obtain the device of the first channel matrix for the subscriber equipment in first user cluster tool and the first pre-coding matrix; For the result according to the second scheduling, obtain the device of second channel matrix for the subscriber equipment in the second user device set and the second pre-coding matrix; And for determining the device of adjustment information based on the first pre-coding matrix, the first channel matrix, the second pre-coding matrix and second channel matrix.
According to one embodiment of present invention, included by adjustment information determining device 310 for determining that the device of adjustment information can comprise based on the first pre-coding matrix, the first channel matrix, the second pre-coding matrix and second channel matrix: for selecting the device of the sub-pre-coding matrix corresponding with the second pre-coding matrix from the first pre-coding matrix; For selecting the device of the sub-channel matrix corresponding with second channel matrix from the first channel matrix; And for according to the second pre-coding matrix, second channel matrix, sub-pre-coding matrix and sub-channel matrix, calculate phase place adjustment matrix using the device as adjustment information.
According to one embodiment of present invention, equipment 300 can also comprise: receiving system (not shown), and this receiving system can be arranged to the result receiving the second scheduling from micro-base station.According to one embodiment of present invention, the result of the second scheduling such as can comprise: the channel condition information of channel between the subscriber equipment in micro-base station and the second user device set.According to another embodiment of the invention, the result of the second scheduling can also comprise following one of at least: the precoding number of plies of the subscriber equipment sequence number in the second user device set, the subscriber equipment in the second user device set, the resource of distributing for the subscriber equipment in the second user device set and demodulated reference signal.
According to one embodiment of present invention, equipment 300 can also comprise: choice device (not shown), this choice device can be arranged to the capacity based on the subscriber equipment in the capacity of the subscriber equipment in adjustment information, first user cluster tool and the second user device set, selects the subscriber equipment that will carry out serving from first user cluster tool and the second user device set.
According to one embodiment of present invention, choice device can comprise: for the capacity according to the subscriber equipment in adjustment information and the second user device set, obtains the device of the adjustment capacity of the subscriber equipment in the second user device set; For obtaining the device of the capacity of the subscriber equipment in first user cluster tool according to the first scheduling; And for the adjustment capacity based on the subscriber equipment in the capacity of the subscriber equipment in first user cluster tool and the second user device set, select the device that will carry out the subscriber equipment of serving.
According to one embodiment of present invention, dispensing device 320 can also be arranged to: send to micro-base station following one of at least: the Modulation and Coding Scheme selected and will from micro-base station to the data of the user device transmissions the second user device set.
Fig. 4 be according to an embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission the flow chart to the method that subscriber equipment is dispatched.Embodiment shown in Fig. 4 can by the micro-base station in cellular communication system or those skilled in the art can other any suitable equipment perform.
Cellular communication system in embodiment shown in Fig. 4 comprises macro base station and micro-base station, and wherein macro base station performs the first scheduling to serve first user cluster tool, and micro-base station performs the second scheduling to serve the second user device set.
In step S401, receive adjustment information from macro base station, wherein adjustment information is determined according to the first scheduling and the second scheduling.
According to one embodiment of present invention, can the adjustment information determined of receiving step S101, and this adjustment information can be determined by macro base station or other suitable equipment any.
According to one embodiment of present invention, the adjustment information that step S401 receives can be the phase place adjustment matrix calculated according to step S201-S206.
In step S402, adjust the data that will send to the subscriber equipment in the second user device set based on adjustment information.
According to one embodiment of present invention, step S402 can by following come: first according to second scheduling result, obtain the second channel matrix for the subscriber equipment in the second user device set and the second pre-coding matrix; Then, adjusting based on adjustment information, the second pre-coding matrix and second channel matrix will from micro-base station to the data of the user device transmissions the second user device set.
According to one embodiment of present invention, the result of the second scheduling can also be sent to described macro base station before step S401.The result of the second scheduling such as can comprise: the CSI of channel between the subscriber equipment in micro-base station and the second user device set.
According to another embodiment of the invention, what the result of the second scheduling can comprise in the following is one or more:
● the CSI of channel between the subscriber equipment in micro-base station and the second user device set,
● the subscriber equipment sequence number in the second user device set,
● the precoding number of plies of the subscriber equipment in the second user device set,
● be the resource that the subscriber equipment in the second user device set distributes, and
● demodulated reference signal (DMRS).
According to one embodiment of present invention, except the adjustment information received in step S401, can also receive the following from described macro base station one or more:
● selected Modulation and Coding Scheme, and
● will from described micro-base station to the data of the user device transmissions described second user device set.
Then, the flow process of Fig. 4 terminates.
Fig. 5 be according to another embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission to the flow chart of the method that subscriber equipment is dispatched.Embodiment shown in Fig. 5 can by the micro-base station in cellular communication system or those skilled in the art can other any suitable equipment perform.
Similar with the embodiment shown in Fig. 4, cellular communication system in embodiment shown in Fig. 5 also comprises macro base station and micro-base station, wherein macro base station performs the first scheduling to serve first user cluster tool, and micro-base station performs the second scheduling to serve the second user device set.
In step S501, send the result of the second scheduling to macro base station.
It should be noted, step S501 is optional.
According to one embodiment of present invention, the second scheduling is performed by micro-base station.By performing the second scheduling, the subscriber equipment that oneself such as can be known in micro-base station (such as, UE6, UE7, UE8, UE9 and UE10) respectively there are how many capacity, and from these subscriber equipmenies, select one group of subscriber equipment (such as, that selection is UE6 and UE7) to serve.Second scheduling can come according to multiple method as known in the art.This group subscriber equipment that micro-base station is dispatched by execution second and carried out serving is called the second user device set.In this example, the second user device set comprises two subscriber equipmenies, is UE6 and UE7 respectively.
By the second scheduling, the result of the second scheduling can be obtained, such as, between micro-base station and the second user device set (that is, micro-base station serve the subscriber equipment) CSI of channel.According to one embodiment of present invention, the result sending the second scheduling to macro base station comprises the CSI of channel between the subscriber equipment that sends in micro-base station and the second user device set.
According to another embodiment of the invention, can also send to macro base station the result comprising following the second scheduling one of at least: the precoding number of plies of the subscriber equipment sequence number in the second user device set, the subscriber equipment in the second user device set, the resource of distributing for the subscriber equipment in the second user device set and demodulated reference signal.
In step S502, receive adjustment information from macro base station.
Similar with step S401, adjustment information can be determined according to the first scheduling and the second scheduling.
According to one embodiment of present invention, can the adjustment information determined of receiving step S101, and this adjustment information can be determined by macro base station or other suitable equipment any.
According to one embodiment of present invention, the adjustment information that step S401 receives can be the phase place adjustment matrix calculated according to step S201-S206.
In step S503, according to the result of the second scheduling, obtain the second channel matrix for the subscriber equipment in the second user device set and the second pre-coding matrix.
This step and step S203 similar.In the present embodiment, the second scheduling is performed by micro-base station, and by performing the second scheduling, micro-base station such as can know the subscriber equipment of oneself has how many capacity respectively, and from these subscriber equipmenies, select one group of subscriber equipment to serve.Second scheduling can come according to multiple method as known in the art.This group subscriber equipment that micro-base station is dispatched by execution second and carried out serving is called the second user device set.
By the second scheduling, channel matrix and the pre-coding matrix of channel between micro-base station and its subscriber equipment of serving can be obtained by multiple prior art or method.Such as, micro-base station can obtain the CSI of channel, then obtains channel matrix according to CSI, and can obtain pre-coding matrix by utilizing the algorithms most in use of this area.These algorithms most in use can be such as SVD decomposition algorithm, ZeroForcing (ZF) algorithm, BlockDiagonal (BD) algorithm etc.
Distinguish for the ease of the channel matrix that obtains with macro base station and pre-coding matrix, the channel matrix for the subscriber equipment in the second user device set obtained according to the result of the second scheduling and pre-coding matrix are called second channel matrix and the second pre-coding matrix.
In step S504, adjusting based on adjustment information, the second pre-coding matrix and second channel matrix will from micro-base station to the data of the user device transmissions the second user device set.
In the present embodiment, the scene identical with the embodiment shown in Fig. 2 is supposed.Suppose that macro base station has 24 antennas, it comprises 3 macrocells, and wherein each macrocell has 8 antennas; Micro-base station has 8 antennas; Subscriber equipment has 2 antennas.Supposing that the second scheduling is carried out in micro-base station is P UE service afterwards, then the channel matrix (that is, second channel matrix) between this P UE and micro-base station is designated as and the second pre-coding matrix is designated as wherein p represents p UE in P UE, L prepresent the number of plies of p UE.
In addition, suppose will to be S from micro-base station to the data of the user device transmissions the second user device set, suppose that the adjustment information received in step S502 is M adjust, then can adjust according to S based on adjustment information, the second pre-coding matrix and second channel logm by through type (6):
S Adjust = H 2 P × 8 Pico · W 8 × Σ p = 1 P L p Pico · diagonal ( θ 1 θ 2 . . . θ Σ p = 1 P L p ) · S - - - ( 6 )
In step S505, by the data after adjustment to user device transmissions.
Then, the flow process of Fig. 5 terminates.
Fig. 6 be according to an embodiment of the invention in the cellular communication system based on collaborative multi-point joint transmission the block diagram to the equipment 600 that subscriber equipment is dispatched.Equipment 600 shown in Fig. 6 can micro-base station in a cellular communication system or those skilled in the art can other any suitable equipment in realize.
Cellular communication system in embodiment shown in Fig. 6 comprises macro base station and micro-base station, and wherein macro base station performs the first scheduling to serve first user cluster tool, and micro-base station performs the second scheduling to serve the second user device set.
According to one embodiment of present invention, equipment 600 can comprise: receiving system 610, and it can be arranged to and receive adjustment information from macro base station, and wherein adjustment information is determined according to the first scheduling and the second scheduling; And adjusting device 620, it can be arranged to and adjust the data that will send to the subscriber equipment in the second user device set based on adjustment information.
According to one embodiment of present invention, adjusting device 620 can comprise: for the result according to the second scheduling, obtain the device of second channel matrix for the subscriber equipment in the second user device set and the second pre-coding matrix; And will from micro-base station to the device of the data of the user device transmissions the second user device set for adjusting based on adjustment information, the second pre-coding matrix and second channel matrix.
According to one embodiment of present invention, equipment 600 can also comprise: dispensing device (not shown), and this dispensing device can be arranged to the result sending the second scheduling at the forward direction macro base station receiving adjustment information from macro base station.According to one embodiment of present invention, the result of the second scheduling can comprise: the channel condition information of channel between the subscriber equipment in micro-base station and the second user device set.According to one embodiment of present invention, the result of the second scheduling can also comprise following one of at least: the precoding number of plies of the subscriber equipment sequence number in the second user device set, the subscriber equipment in the second user device set, the resource of distributing for the subscriber equipment in the second user device set and demodulated reference signal.
According to one embodiment of present invention, receiving system 610 can be arranged to further: from macro base station receive following one of at least: the Modulation and Coding Scheme selected and will from micro-base station to the data of the user device transmissions the second user device set.
By of the present invention in the cellular communication system based on collaborative multi-point joint transmission to the method and apparatus that subscriber equipment is dispatched, can realize being applicable to FDD system and TDD system in Release11, and the dispatching user facility of the strict demand of inter-siteCoMP technology can be met simultaneously.
Method disclosed in embodiments of the present invention can realize in the combination of software, hardware or software and hardware.Hardware components can utilize special logic to realize; Software section can store in memory, and by suitable instruction execution system, such as microprocessor, personal computer (PC) or large-scale computer perform.In a preferred embodiment, the present invention is embodied as software, and it includes but not limited to firmware, resident software, microcode etc.
And embodiments of the present invention can also be taked can from the form of the computer program that computer can be used or computer-readable medium is accessed, and these media provide program code use for computer or any instruction execution system or be combined with it.For the purpose of description, computer can with or computer-readable mechanism can be any tangible device, it can comprise, store, communicate, propagate or transmission procedure with by instruction execution system, device or equipment use or be combined with it.
Medium can be electric, magnetic, light, electromagnetism, ultrared or the system of semiconductor (or device or device) or propagation medium.The example of computer-readable medium comprises semiconductor or solid-state memory, tape, removable computer diskette, random access storage device (RAM), read-only memory (ROM), hard disc and CD.The example of current CD comprises compact disk-read-only memory (CD-ROM), compact disk-read/write (CD-R/W) and DVD.
The system being suitable for storage/or execution program code according to the embodiment of the present invention will comprise at least one processor, and it directly or by system bus is coupled to memory component indirectly.Local storage, mass storage that memory component utilizes the term of execution of can being included in program code actual and provide the interim storage of program code at least partially the cache memory of the number of times of code must be fetched the term of execution of minimizing from mass storage.
I/O or I/O equipment (including but not limited to keyboard, display, indication equipment etc.) directly or by middle I/O controller can be coupled to system.
Network adapter also can be coupled to system, can be coupled to other system or remote printer or memory device to make system by middle privately owned or public network.Modulator-demodulator, cable modem and Ethernet card are only several examples of current available types of network adapters.
It should be noted that to make embodiments of the present invention be easier to understand, it be known and for embodiments of the present invention realization for a person skilled in the art may be required some ins and outs more specifically that description above eliminates.
There is provided specification of the present invention to be to illustrate and describing, instead of be used for exhaustive or limit the invention to disclosed form.For those of ordinary skill in the art, many modifications and changes are all fine.
Therefore; selecting and describing execution mode is to explain principle of the present invention and practical application thereof better; and those of ordinary skill in the art are understood, under the prerequisite not departing from essence of the present invention, all modifications and change all fall within protection scope of the present invention defined by the claims.

Claims (22)

1. one kind in the cellular communication system based on collaborative multi-point joint transmission to the method that subscriber equipment is dispatched, wherein said cellular communication system comprises macro base station and micro-base station, described macro base station performs the first scheduling to serve first user cluster tool, described micro-base station performs the second scheduling to serve the second user device set, and described method comprises:
Adjustment information is determined according to described first scheduling and described second scheduling; And
Described adjustment information is sent to described micro-base station, so that the data that adjustment will send to the subscriber equipment in described second user device set,
Wherein determine that adjustment information comprises according to described first scheduling and described second scheduling:
According to the result of described first scheduling, obtain the first channel matrix for the subscriber equipment in described first user cluster tool and the first pre-coding matrix;
According to the result of described second scheduling, obtain the second channel matrix for the subscriber equipment in described second user device set and the second pre-coding matrix; And
Described adjustment information is determined based on described first pre-coding matrix, described first channel matrix, described second pre-coding matrix and described second channel matrix,
Wherein determine that described adjustment information comprises based on described first pre-coding matrix, described first channel matrix, described second pre-coding matrix and described second channel matrix:
The sub-pre-coding matrix corresponding with described second pre-coding matrix is selected from described first pre-coding matrix;
The sub-channel matrix corresponding with described second channel matrix is selected from described first channel matrix; And
According to described second pre-coding matrix, described second channel matrix, described sub-pre-coding matrix and described sub-channel matrix, calculate phase place adjustment matrix using as described adjustment information.
2. method according to claim 1, also comprises:
Receive the result of described second scheduling from described micro-base station, the result of wherein said second scheduling comprises: the channel condition information of channel between the subscriber equipment in described micro-base station and described second user device set.
3. method according to claim 2, the result of wherein said second scheduling also comprise following one of at least: the precoding number of plies of the subscriber equipment in the subscriber equipment sequence number in described second user device set, described second user device set, the resource of distributing for the subscriber equipment in described second user device set and demodulated reference signal.
4. method according to claim 1, also comprises:
Based on the capacity of the subscriber equipment in the capacity of the subscriber equipment in described adjustment information, described first user cluster tool and described second user device set, from described first user cluster tool and described second user device set, select the subscriber equipment that will carry out serving.
5. method according to claim 4, wherein based on the capacity of the subscriber equipment in the capacity of the subscriber equipment in described adjustment information, described first user cluster tool and described second user device set, from described first user cluster tool and described second user device set, the subscriber equipment that will carry out serving is selected to comprise:
According to the capacity of the subscriber equipment in described adjustment information and described second user device set, obtain the adjustment capacity of the subscriber equipment in described second user device set;
The capacity of the subscriber equipment in described first user cluster tool is obtained according to described first scheduling; And
Based on the adjustment capacity of the subscriber equipment in the capacity of the subscriber equipment in described first user cluster tool and described second user device set, select the subscriber equipment that will carry out serving.
6. method according to claim 1, also comprises:
Send to described micro-base station following one of at least: the Modulation and Coding Scheme selected and will from described micro-base station to the data of the user device transmissions described second user device set.
7. one kind in the cellular communication system based on collaborative multi-point joint transmission to the method that subscriber equipment is dispatched, wherein said cellular communication system comprises macro base station and micro-base station, described macro base station performs the first scheduling to serve first user cluster tool, described micro-base station performs the second scheduling to serve the second user device set, and described method comprises:
Receive adjustment information from described macro base station, wherein said adjustment information is determined according to described first scheduling and described second scheduling; And
The data that will send to the subscriber equipment in described second user device set are adjusted based on described adjustment information,
Wherein said adjustment information is determined by following according to described first scheduling and described second scheduling:
According to the result of described first scheduling, obtain the first channel matrix for the subscriber equipment in described first user cluster tool and the first pre-coding matrix;
According to the result of described second scheduling, obtain the second channel matrix for the subscriber equipment in described second user device set and the second pre-coding matrix; And
Described adjustment information is determined based on described first pre-coding matrix, described first channel matrix, described second pre-coding matrix and described second channel matrix,
Wherein determine that described adjustment information comprises based on described first pre-coding matrix, described first channel matrix, described second pre-coding matrix and described second channel matrix:
The sub-pre-coding matrix corresponding with described second pre-coding matrix is selected from described first pre-coding matrix;
The sub-channel matrix corresponding with described second channel matrix is selected from described first channel matrix; And
According to described second pre-coding matrix, described second channel matrix, described sub-pre-coding matrix and described sub-channel matrix, calculate phase place adjustment matrix using as described adjustment information.
8. method according to claim 7, wherein adjusts the data that will send to the subscriber equipment in described second user device set based on described adjustment information and comprises:
According to the result of described second scheduling, obtain the second channel matrix for the subscriber equipment in described second user device set and the second pre-coding matrix; And
Adjusting based on described adjustment information, described second pre-coding matrix and described second channel matrix will from described micro-base station to the data of the user device transmissions described second user device set.
9. method according to claim 7, also comprised before receiving adjustment information from macro base station:
Send the result of described second scheduling to described macro base station, the result of wherein said second scheduling comprises: the channel condition information of channel between the subscriber equipment in described micro-base station and described second user device set.
10. method according to claim 9, the result of wherein said second scheduling also comprise following one of at least: the precoding number of plies of the subscriber equipment in the subscriber equipment sequence number in described second user device set, described second user device set, the resource of distributing for the subscriber equipment in described second user device set and demodulated reference signal.
11. methods according to claim 7, also comprise:
From described macro base station receive following one of at least: the Modulation and Coding Scheme selected and will from described micro-base station to the data of the user device transmissions described second user device set.
12. 1 kinds in the cellular communication system based on collaborative multi-point joint transmission to the equipment that subscriber equipment is dispatched, wherein said cellular communication system comprises macro base station and micro-base station, described macro base station performs the first scheduling to serve first user cluster tool, described micro-base station performs the second scheduling to serve the second user device set, and described equipment comprises:
Adjustment information determining device, is arranged to and determines adjustment information according to described first scheduling and described second scheduling; And
Dispensing device, is arranged to and sends described adjustment information to described micro-base station, so that the data that adjustment will send to the subscriber equipment in described second user device set,
Wherein said adjustment information determining device comprises:
For the result according to described first scheduling, obtain the device of the first channel matrix for the subscriber equipment in described first user cluster tool and the first pre-coding matrix;
For the result according to described second scheduling, obtain the device of second channel matrix for the subscriber equipment in described second user device set and the second pre-coding matrix; And
For determining the device of described adjustment information based on described first pre-coding matrix, described first channel matrix, described second pre-coding matrix and described second channel matrix,
Wherein for determining that the device of described adjustment information comprises based on described first pre-coding matrix, described first channel matrix, described second pre-coding matrix and described second channel matrix:
For selecting the device of the sub-pre-coding matrix corresponding with described second pre-coding matrix from described first pre-coding matrix;
For selecting the device of the sub-channel matrix corresponding with described second channel matrix from described first channel matrix; And
For according to described second pre-coding matrix, described second channel matrix, described sub-pre-coding matrix and described sub-channel matrix, calculate phase place adjustment matrix using the device as described adjustment information.
13. equipment according to claim 12, also comprise:
Receiving system, is arranged to the result receiving described second scheduling from described micro-base station, and the result of wherein said second scheduling comprises: the channel condition information of channel between the subscriber equipment in described micro-base station and described second user device set.
14. equipment according to claim 13, the result of wherein said second scheduling also comprise following one of at least: the precoding number of plies of the subscriber equipment in the subscriber equipment sequence number in described second user device set, described second user device set, the resource of distributing for the subscriber equipment in described second user device set and demodulated reference signal.
15. equipment according to claim 12, also comprise:
Choice device, be arranged to the capacity based on the subscriber equipment in the capacity of the subscriber equipment in described adjustment information, described first user cluster tool and described second user device set, from described first user cluster tool and described second user device set, select the subscriber equipment that will carry out serving.
16. equipment according to claim 15, wherein said choice device comprises:
For the capacity according to the subscriber equipment in described adjustment information and described second user device set, obtain the device of the adjustment capacity of the subscriber equipment in described second user device set;
For obtaining the device of the capacity of the subscriber equipment in described first user cluster tool according to described first scheduling; And
For the adjustment capacity based on the subscriber equipment in the capacity of the subscriber equipment in described first user cluster tool and described second user device set, select the device that will carry out the subscriber equipment of serving.
17. equipment according to claim 12, wherein said dispensing device is arranged to further:
Send to described micro-base station following one of at least: the Modulation and Coding Scheme selected and will from described micro-base station to the data of the user device transmissions described second user device set.
18. 1 kinds in the cellular communication system based on collaborative multi-point joint transmission to the equipment that subscriber equipment is dispatched, wherein said cellular communication system comprises macro base station and micro-base station, described macro base station performs the first scheduling to serve first user cluster tool, described micro-base station performs the second scheduling to serve the second user device set, and described equipment comprises:
Receiving system, is arranged to and receives adjustment information from described macro base station, and wherein said adjustment information is determined according to described first scheduling and described second scheduling; And
Adjusting device, is arranged to and adjusts the data that will send to the subscriber equipment in described second user device set based on described adjustment information,
Wherein said adjustment information is determined by following according to described first scheduling and described second scheduling:
According to the result of described first scheduling, obtain the first channel matrix for the subscriber equipment in described first user cluster tool and the first pre-coding matrix;
According to the result of described second scheduling, obtain the second channel matrix for the subscriber equipment in described second user device set and the second pre-coding matrix; And
Described adjustment information is determined based on described first pre-coding matrix, described first channel matrix, described second pre-coding matrix and described second channel matrix,
Wherein determine that described adjustment information comprises based on described first pre-coding matrix, described first channel matrix, described second pre-coding matrix and described second channel matrix:
The sub-pre-coding matrix corresponding with described second pre-coding matrix is selected from described first pre-coding matrix;
The sub-channel matrix corresponding with described second channel matrix is selected from described first channel matrix; And
According to described second pre-coding matrix, described second channel matrix, described sub-pre-coding matrix and described sub-channel matrix, calculate phase place adjustment matrix using as described adjustment information.
19. equipment according to claim 18, wherein said adjusting device comprises:
For the result according to described second scheduling, obtain the device of second channel matrix for the subscriber equipment in described second user device set and the second pre-coding matrix; And
Will from described micro-base station to the device of the data of the user device transmissions described second user device set for adjusting based on described adjustment information, described second pre-coding matrix and described second channel matrix.
20. equipment according to claim 18, also comprise:
Dispensing device, be arranged to and send the result of described second scheduling receiving macro base station described in the forward direction of adjustment information from macro base station, the result of wherein said second scheduling comprises: the channel condition information of channel between the subscriber equipment in described micro-base station and described second user device set.
21. equipment according to claim 20, the result of wherein said second scheduling also comprise following one of at least: the precoding number of plies of the subscriber equipment in the subscriber equipment sequence number in described second user device set, described second user device set, the resource of distributing for the subscriber equipment in described second user device set and demodulated reference signal.
22. equipment according to claim 18, wherein said receiving system is arranged to further:
From described macro base station receive following one of at least: the Modulation and Coding Scheme selected and will from described micro-base station to the data of the user device transmissions described second user device set.
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