CN101945443B - A kind of information notice method and system - Google Patents
A kind of information notice method and system Download PDFInfo
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- CN101945443B CN101945443B CN200910088132.3A CN200910088132A CN101945443B CN 101945443 B CN101945443 B CN 101945443B CN 200910088132 A CN200910088132 A CN 200910088132A CN 101945443 B CN101945443 B CN 101945443B
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- transmission point
- transmitting power
- power information
- down transmitting
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- 230000005540 biological transmission Effects 0.000 claims abstract description 200
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- 238000005516 engineering process Methods 0.000 description 4
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- 230000000737 periodic effect Effects 0.000 description 2
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Abstract
The invention discloses a kind of information notice method and system, with so that each transmission point that needs issue data to same UE obtains respective down transmitting power information simultaneously.A kind of information notice method that the present invention provides includes: the Serving cell of user equipment (UE), determines the down transmitting power information needing simultaneously to issue for described UE corresponding to each transmission point of data；Down transmitting power information corresponding to the transmission point of UE is notified to this transmission point by described Serving cell.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of information notice method and system.
Background technology
Coordinated multipoint transmission (CoMP, Coordinated Multi-point transmission/reception) skill
Art refers to that the data of same subscriber equipment (UE) are sent out by multiple collaborative participations of transmission point separated on geographical position
Send/receive, to improve edge customer received signal quality, send (descending CoMP) including descending coordination multiple spot
With up coordination multipoint reception (up CoMP).
Descending CoMP is divided into two classes: Combined Treatment and coordinated scheduling/wave beam forming.When using Combined Treatment
Time, downlink data can in CoMP collaboration set (CoMP cooperating set) each transmission point
Issue.CoMP collaboration set is the transmission point set that may issue data that network side determines, typically by
Network side is dynamically determined based on realizing algorithm.Combined Treatment can be further divided into again two kinds: combine transmission and
Dynamic cell selects.Wherein, combine transmission and refer to have multiple transmission point to issue Physical Downlink Shared Channel simultaneously
(PDSCH) data；Dynamic cell selects to refer to that at a time only one of which transmission point issues PDSCH
Data.
Each transmission point simultaneously issuing data to UE may belong to the Serving cell of this UE, it is also possible to belongs to
Cooperation cell in this UE.Service in so-called Serving cell, i.e. long evolving system (LTE) is little
District, is connected with there is wireless spread-spectrum technology (RRC) between UE, and is responsible for controlling letter by physical down
Road (PDCCH) distributes information to UE indicating downlink data.So-called cooperation cell, refers to participate in certain
The adjacent cell that downlink data issues.The cooperation cell of same UE and Serving cell, may belong to same drilling
Enter type base station (eNB), it is also possible to belong to different eNB.
Descending CoMP technology is at present it has been determined that use UE DRS (Dedicated Reference Signal) (DRS) demodulation PDSCH
Data.For DRS, it is considered that downlink data Resource Unit and reference signal resource unit are made same
Processing, the power of data resource element and reference signal resource unit can be completely the same.So network side exists
When determining the transmitting power of downlink data, downlink power control parameter PA that can not be configured and PB value
Limit, dynamically adjust the down transmitting power of each transmission point participating in joint transmission, to ensure that data pass
Alleviate the interference to adjacent cell while defeated performance as far as possible.
In Combined Treatment mode, participate in needing mutual between transmission point and the Serving cell of data distributing and being total to
Enjoying downlink data and schedule information, schedule information includes the running time-frequency resource that transmission time points information, transmission take
Information, uplink/downlink antenna transmission mode information etc..If the Serving cell that community is UE belonging to transmission point,
Or the community belonging to transmission point belongs to same eNB (Intra-eNB DL CoMP), then with Serving cell
Data and schedule information are shared and are easily achieved.If the community belonging to transmission point belongs to different from Serving cell
ENB (Inter-eNB DL CoMP), then between data and schedule information shared needs by eNB
Interface message complete.Data transmission between eNB at present is realized by X2 interface.X2 interface controls
Plane uses Simple Control Transmission Protocol (SCTP, Simple control transmission protocol) mode,
Transmission, user plane IP based network, it is provided that the number of users between eNB reliably is provided for signaling message
According to transfer function.
In sum, descending CoMP of the prior art needs one or more transmission point simultaneously to same
UE sends data, therefore, needs to realize data, schedule information and power information etc. between these transmission points
Share.But, prior art is not given each biography needing simultaneously to issue data to same UE
How defeated point obtains the technical scheme of down transmitting power information.
Summary of the invention
Embodiments provide a kind of information notice method and system, with so that needing simultaneously to same
UE issues each transmission point of data and obtains respective down transmitting power information.
A kind of information notice method that the embodiment of the present invention provides includes:
The Serving cell of user equipment (UE), determines each transmission needing simultaneously to issue data for described UE
Down transmitting power information corresponding to Dian；
Down transmitting power information corresponding to the transmission point of UE is notified to this transmission by described Serving cell
Point.
A kind of communication system that the embodiment of the present invention provides includes:
Serving cell unit, is connected for setting up radio resource control RRC with user equipment (UE), and
Determine the down transmitting power information needing simultaneously to issue for described UE corresponding to each transmission point of data；
Down transmitting power information corresponding to the transmission point of UE is notified to this transmission point；
Transmission point, for receiving the down transmitting power information that described Serving cell unit sends, and according to this
Down transmitting power information issues data to described UE.
The embodiment of the present invention, is determined by the Serving cell of user equipment (UE) and needs for described UE with at present
Send out each down transmitting power information corresponding to transmission point of data；Described Serving cell is by the transmission of UE
Down transmitting power information corresponding to Dian notifies to this transmission point, so that need simultaneously to same UE
Each transmission point issuing data can obtain respective down transmitting power information, and and then determines respective
Down transmitting power, it is achieved that the power of descending CoMP controls, at the base ensureing downlink data transmission performance
Intrasystem interference is alleviated on plinth.
Accompanying drawing explanation
The schematic flow sheet of a kind of information notice method that Fig. 1 provides for the embodiment of the present invention；
The structural representation of a kind of communication system that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
Embodiments provide a kind of information notice method and system, with so that needing simultaneously to same
UE issues each transmission point of data and obtains respective down transmitting power information.
The technical scheme provided the embodiment of the present invention below in conjunction with the accompanying drawings illustrates.
Seeing Fig. 1, a kind of information notice method that the embodiment of the present invention provides includes step:
The Serving cell of S101, UE, determines and needs each transmission point simultaneously issuing data for UE right
The down transmitting power information answered.
Need to issue for UE each transmission point of data simultaneously, i.e. participate in same UE is carried out joint transmission
Each transmission point.
Down transmitting power information corresponding to the transmission point of UE is notified to this transmission by S102, Serving cell
Point.
It is preferred that when the transmission point affiliated subdistrict of UE belongs to different base stations from the Serving cell of this UE
(eNB), time, this Serving cell passes through X2 interface by the down transmitting power corresponding to the transmission point of UE
Information notifies to this transmission point.
Downlink channel condition information (CSI) that Serving cell can report according to UE, the running time-frequency resource of distribution,
The combined factors such as the Power Limitation of transmission point determine the down transmitting power information that this transmission point is corresponding.
The time of notice down transmitting power information can determine to use following three kinds of modes:
Mode one: the down transmitting power information corresponding to the transmission point of UE is periodically led to by Serving cell
Know to this transmission point.
Mode two: Serving cell according to network state change, in real time by UE transmission point corresponding under
Row transmission power information notifies to this transmission point.
Mode three: Serving cell is sending while schedule information to the transmission point of UE, by this transmission point institute
Corresponding down transmitting power information notifies, to this transmission point, to comprise downlink in wherein said schedule information
Power information.
About mode one, the downlink channel condition information that Serving cell reports according to UE and the power of transmission point
The factors such as restriction are periodically sent out to each transmission point that may participate in sending for the downlink data of same UE
Send down transmitting power information.In the transmission cycle of down transmitting power information, can report down according to UE
The factors such as the bandwidth that the cycle of row channel condition information, X2 interface distribute determine.Such as, if the UE cycle
Property ground feedback of down channel status information (such as periodic report CQI), then Serving cell can report based on UE
For each transmission point downlink channel condition information, transmit some multiple-input, multiple-output (MIMO) according to descending more
Pattern, uses certain power control rule (such as water filling theorem) to determine each transmission preferred down transmitting power of point,
Then notify that each transmits point.
About mode two, Serving cell changes according to network state, only updates under a certain transmission point needing
Just down transmitting power information is sent to this transmission point when row launches power.Reason (the i.e. network state updated
Change) can include the most several:
A (), UE periodic report downlink channel condition information, report moment Serving cell to determine transmission at some
The down transmitting power of point needs amendment；
B (), UE report downlink channel condition information aperiodic, determine that each passes reporting moment Serving cell
The transmitting power of defeated point；
(c), descending transmit some MIMO mode more and change, Serving cell judges the transmitting of each transmission point
Power needs to change therewith；
D the transmission point set change of (), participation associating transmission, Serving cell judges the transmitting power of each transmission point
Need to change therewith.Transmission point set described herein, refers to same UE be issued data by simultaneously participating in
The set that constitutes of each transmission point, be a subset of CoMP collaboration set.
Mode two the most mutual down transmitting power information, can save X2 relative to mode one and connect
The partial discharge expense of mouth.
About mode three, Serving cell participate between the transmission point that certain data aggregate sends interaction data and
During schedule information, mutual down transmitting power information, down transmitting power information may be embodied in schedule information
In be sent simultaneously to each transmission point.Mode three can by down transmitting power information with certain transmission point certain
Data distributing is directly mapped, and can determine down transmitting power in real time based on dispatch situation, therefore with side
It is higher that formula one compares order of accuarcy with mode two, but traffic overhead is bigger.
When Serving cell uses mode one or mode two to issue down transmitting power information, issue downlink
The object transmission point of power information can be: descending CoMP measures the transmission point concentrated；Or, on UE
Report the transmission point (belong to CoMP and measure a subset of collection) of downlink channel condition information.
Described CoMP measures collection, refers to transmission point (or community) of the possible reporting status information of channel of UE
Set, this set is configured by network side, is a relatively large set, changes at a slow speed.CoMP assists
Make collection and can be regarded as a subset of CoMP measurement collection.
When Serving cell uses mode one or mode two to issue down transmitting power information, each transmission point receives
After the down transmitting power information of self correspondence, store down transmitting power information, according to down transmitting power
Information determines the down transmitting power needing to use, and uses this down transmitting power to issue data.When a certain
When transmission point is not belonging to the member that CoMP measures collection, Serving cell notifies this self correspondence of transmission point deletion
Down transmitting power information.
When Serving cell uses mode three to issue down transmitting power information, it is corresponding that each transmission point receives self
Down transmitting power information after, and issue to UE in the down transmitting power information according to self correspondence
After data, delete the down transmitting power information of self correspondence.
It is preferred that after the transmission point of UE receives the down transmitting power information of self correspondence, can be according to certainly
The down transmitting power information that body is corresponding determines down transmitting power, and also can be according to own situation to this
Down transmitting power is adjusted.It is to say, the down transmitting power that each transmission point finally determines, permissible
It is the down transmitting power of Serving cell instruction, it is also possible to be according to self on the basis of Serving cell indicates
Situation be adjusted after down transmitting power.
Down transmitting power information, the transmission point under indicating downlink Combined Treatment mode is at the time-frequency taken
The down transmitting power used in resource, for the granule of the down transmitting power information of arbitrary transmission point instruction
Degree can have the most several:
The first: based on UE, i.e. for each UE, one downlink is only specified for each transmission point
Performance number.
Serving cell indicates unique down transmitting power value for same UE for each transmission point, represents
Corresponding transmission point uses this performance number to issue data to UE on the downlink resource block of all distribution.
The second: based on subband, i.e. for each UE, each descending subband of each transmission point is specified one
Individual down transmitting power value.
Described subband, refers to the Resource Block set that continuous print multiple Adjacent resource block is constituted.
Can arrange, between Serving cell and transmission point, the concrete Resource Block that a certain subband comprises in advance, service little
District is all or some subband indicates down transmitting power value corresponding to each subband, represent correspondence transmission point minute
(corresponding descending of this subband of identical down transmitting power value is used on the Resource Block belonging to same subband joined
Launch power) issue data to UE.
Each transmission point can corresponding multiple descending subbands, the most each transmission point can corresponding multiple descending
Penetrate performance number.
The third: based on Resource Block, i.e. for each UE, each downlink resource block of each transmission point is referred to
A fixed down transmitting power value.
Serving cell is all or some Resource Block indicates the transmission power level that each Resource Block is corresponding, represents correspondence
Transmission point distribution Resource Block on use this Resource Block corresponding a down transmitting power value issue data to
UE。
Each transmission point can corresponding multiple downlink resource blocks, the most each transmission point can be corresponding multiple descending
Transmission power level.
Three of the above rule, the signaling consumption of the down transmitting power information that the first is given is minimum；The third
The down transmitting power information be given is the most detailed.
In actual applications, can be according to the bandwidth of the X2 interface between eNB and data transmission performance demand
Deng, comprehensively determine which kind of granularity notice down transmitting power information of concrete employing.
To sum up, (each transmission point is corresponding for each transmission corresponding down transmitting power information of point of UE
Down transmitting power information can be the same or different)；Or,
Each transmission corresponding multinomial down transmitting power information of point of UE, wherein each down transmitting power letter
Cease corresponding with a downlink resource block of this transmission point or relative with the descending subband that this transmission is put
Should.
It addition, in the embodiment of the present invention, except each transmission point that Serving cell can be UE determines descending
Launch outside power, it is also possible to determined by each transmission point that operation and maintenance center (OMC) is UE
Down transmitting power, or, each transmission point of UE determines self according to downlink power control related algorithm alone
Down transmitting power.
System that the embodiment of the present invention provide is described below.
Seeing Fig. 2, a kind of communication system that the embodiment of the present invention provides includes: Serving cell unit 11 and extremely
Few transmission point 12.
Serving cell unit 11, is connected for setting up RRC with UE, and determines while need for UE
Issue each transmission point down transmitting power information corresponding to 12 of data；The transmission of UE is put 12 institutes
Corresponding down transmitting power information notifies to this transmission point 12.
Transmission point 12, for receiving the down transmitting power information that Serving cell unit 11 sends, and according to
This down transmitting power information issues data to UE.
Serving cell unit 11 and transmission point 12 may be located at same base station (eNB), it is also possible to be positioned at difference
ENB, the eNB that each transmission point 12 can also be positioned at same eNB or different.
It is preferred that when Serving cell unit 11 is positioned at different base stations from transmission point 12, Serving cell list
Unit 11, is notified the down transmitting power information corresponding to the transmission point 12 of UE to this biography by X2 interface
Defeated point.
It is preferred that described Serving cell unit 11, under periodically the transmission of UE being put corresponding to 12
Row transmission power information notifies to this transmission point 12；Or,
Described Serving cell unit 11, changes according to network state, in real time by right for transmission point 12 institute of UE
The down transmitting power information answered notifies to this transmission point 12.
In both cases, collection is measured when described transmission point 12 is not belonging to coordinated multipoint transmission CoMP
During member, described Serving cell unit 11 notifies that this transmission point 12 deletes the down transmitting power of self correspondence
Information.
Described Serving cell unit 11, it is also possible to while sending schedule information to the transmission point 12 of UE,
Down transmitting power information corresponding to this transmission point 12 is notified to this transmission point 12, wherein said scheduling
Information comprises described down transmitting power information.
In this case, described transmission point 12, receiving down transmitting power information, and descending according to this
Transmission power information, after described UE issues data, deletes this down transmitting power information.
It is preferred that described transmission point 12, after receiving down transmitting power information, according to this down transmitting power
Information determines down transmitting power, and is adjusted this down transmitting power.
It is preferred that described Serving cell unit 11, under each transmission point 12 correspondence one of the UE determined
Row transmission power information；Or,
Described Serving cell unit 11, each transmission point 12 corresponding multinomial downlink merits of the UE determined
Rate information, wherein each down transmitting power information is corresponding with a downlink resource block of this transmission point 12,
Or it is corresponding with a descending subband of this transmission point 12.
In sum, the embodiment of the present invention proposes under descending CoMP Combined Treatment mode, UE's
Transmit the scheme of down transmitting power information between each cooperation transmission point of Serving cell and this UE, pass through
Each transmission point that Serving cell combines transmission to participation sends down transmitting power information, it is achieved thereby that under
The power of row CoMP controls, and alleviates in system on the basis of ensure that downlink data transmission performance
Interference.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (14)
1. an information notice method, it is characterised in that the method includes:
The Serving cell of user equipment (UE), determines each transmission needing simultaneously to issue data for described UE
Down transmitting power information corresponding to Dian；
Down transmitting power information corresponding to each transmission point of UE is notified to correspondence by described Serving cell
Transmission point；
Wherein, described Serving cell is by the down transmitting power information notice corresponding to each transmission point of UE
The step giving corresponding transmission point includes:
Down transmitting power information corresponding to each transmission point of UE is periodically led to by described Serving cell
Know to corresponding transmission point；Or,
Described Serving cell according to network state change, in real time by UE each transmission point corresponding to descending
Transmission power information notifies to corresponding transmission point.
Method the most according to claim 1, it is characterised in that each by UE of described Serving cell
Down transmitting power information corresponding to individual transmission point notifies to include to the step of corresponding transmission point:
When transmitting the base station that some affiliated subdistrict belongs to different from described Serving cell of described UE, described clothes
Down transmitting power information corresponding to the transmission point of UE is notified to this transmission by business community by X2 interface
Point.
Method the most according to claim 1, it is characterised in that the transmission point of described UE receives certainly
After the down transmitting power information that body is corresponding, the method also includes:
When the transmission point of described UE is not belonging to the member that coordinated multipoint transmission CoMP measures collection, described clothes
Business community notifies the down transmitting power information of this self correspondence of transmission point deletion.
Method the most according to claim 1, it is characterised in that each by UE of described Serving cell
Down transmitting power information corresponding to individual transmission point notifies to include to the step of corresponding transmission point:
Described Serving cell is while sending schedule information to the transmission point of UE, corresponding to this transmission point
Down transmitting power information notify, to this transmission point, wherein said schedule information to comprise described downlink
Power information.
Method the most according to claim 4, it is characterised in that the transmission point of described UE receives certainly
After the down transmitting power information that body is corresponding, the method also includes:
The transmission point of described UE issues number in the down transmitting power information according to self correspondence to described UE
According to rear, delete the down transmitting power information of self correspondence.
Method the most according to claim 1, it is characterised in that the transmission point of described UE receives certainly
After the down transmitting power information that body is corresponding, the method also includes:
The transmission point of described UE determines down transmitting power according to the down transmitting power information of self correspondence,
And this down transmitting power is adjusted.
Method the most according to claim 1, it is characterised in that each transmission point of described UE is right
Answer a down transmitting power information；Or,
Each transmission point corresponding multinomial down transmitting power information, wherein each downlink merit of described UE
Rate information is corresponding with a downlink resource block of this transmission point, or the descending subband put with this transmission
Corresponding.
8. a communication system, it is characterised in that this system includes:
Serving cell unit, is connected for setting up radio resource control RRC with user equipment (UE), and
Determine the down transmitting power information needing simultaneously to issue for described UE corresponding to each transmission point of data；
Down transmitting power information corresponding to each transmission point of UE is notified to corresponding transmission point；
Transmission point, for receiving the down transmitting power information that described Serving cell unit sends, and according to this
Down transmitting power information issues data to described UE；
Wherein, described Serving cell unit, periodically by descending corresponding to each transmission point of UE
Penetrate power information to notify to corresponding transmission point；Or,
Described Serving cell unit, changes according to network state, in real time by corresponding for each transmission point of UE
Down transmitting power information notify to corresponding transmission point.
System the most according to claim 8, it is characterised in that when described Serving cell unit and institute
State transmission point when being positioned at different base stations,
Described Serving cell unit, by X2 interface by the downlink corresponding to the transmission point of described UE
Power information notifies to this transmission point.
System the most according to claim 8, it is characterised in that when described transmission point is not belonging to coordinate
When multicast communication CoMP measures the member of collection, described Serving cell unit notifies that this transmission point deletion self is right
The down transmitting power information answered.
11. systems according to claim 8, it is characterised in that described Serving cell unit, to
While the transmission point of UE sends schedule information, the down transmitting power information corresponding to this transmission point is led to
Know to this transmission point, wherein said schedule information comprises described down transmitting power information.
12. systems according to claim 11, it is characterised in that described transmission point, under receiving
Row transmission power information, and according to this down transmitting power information after described UE issues data, deleting should
Down transmitting power information.
13. systems according to claim 8, it is characterised in that described transmission point, receive descending
After penetrating power information, determine down transmitting power according to this down transmitting power information, and to this downlink
Power is adjusted.
14. systems according to claim 8, it is characterised in that described Serving cell unit, determine
Each transmission corresponding down transmitting power information of point of described UE；Or,
Described Serving cell unit, each transmission corresponding multinomial down transmitting power of point of the described UE determined
Information, wherein each down transmitting power information is corresponding with a downlink resource block of this transmission point, or
Corresponding with the descending subband that this transmission is put.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910088132.3A CN101945443B (en) | 2009-07-08 | 2009-07-08 | A kind of information notice method and system |
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| CN200910088132.3A CN101945443B (en) | 2009-07-08 | 2009-07-08 | A kind of information notice method and system |
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| CN101945443A CN101945443A (en) | 2011-01-12 |
| CN101945443B true CN101945443B (en) | 2016-09-14 |
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| CN200910088132.3A Active CN101945443B (en) | 2009-07-08 | 2009-07-08 | A kind of information notice method and system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US9204481B2 (en) | 2011-10-07 | 2015-12-01 | Futurewei Technologies, Inc. | System and method for transmitting uplink data associated with downlink multiple point transmission |
| CN103916945B (en) * | 2013-01-04 | 2018-02-16 | 中兴通讯股份有限公司 | A kind of collocation method and device of descending power parameter |
| WO2024031604A1 (en) * | 2022-08-12 | 2024-02-15 | Qualcomm Incorporated | Coherent joint transmissions with transmission reception point (trp) level power restrictions |
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| EP1909432A1 (en) * | 2006-10-06 | 2008-04-09 | Fujitsu Ltd. | Mobile wireless communication system, access gateway, wireless base station, and mobile wireless communication control method |
| CN101383775A (en) * | 2008-10-10 | 2009-03-11 | 北京邮电大学 | Multi-service mixed transmission implementing method in OFDM cooperation/relay system |
| CN101394649A (en) * | 2007-09-21 | 2009-03-25 | 夏普株式会社 | Method and base station for lowering interference between cells in uplink cell communication system |
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| EP1909432A1 (en) * | 2006-10-06 | 2008-04-09 | Fujitsu Ltd. | Mobile wireless communication system, access gateway, wireless base station, and mobile wireless communication control method |
| CN101159662A (en) * | 2006-10-06 | 2008-04-09 | 富士通株式会社 | Mobile wireless communication system, access gateway, wireless base station, and mobile wireless communication control method |
| CN101394649A (en) * | 2007-09-21 | 2009-03-25 | 夏普株式会社 | Method and base station for lowering interference between cells in uplink cell communication system |
| CN101383775A (en) * | 2008-10-10 | 2009-03-11 | 北京邮电大学 | Multi-service mixed transmission implementing method in OFDM cooperation/relay system |
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