CN102457358A - Scheduling method and system for coordinated transmission - Google Patents
Scheduling method and system for coordinated transmission Download PDFInfo
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- CN102457358A CN102457358A CN2010105196439A CN201010519643A CN102457358A CN 102457358 A CN102457358 A CN 102457358A CN 2010105196439 A CN2010105196439 A CN 2010105196439A CN 201010519643 A CN201010519643 A CN 201010519643A CN 102457358 A CN102457358 A CN 102457358A
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Abstract
The invention discloses a scheduling method and system for coordinated transmission. The scheduling method comprises the following steps: dividing users in a service cell into a central user and border users by the service cell and confirming a coordinated cell for the border users; finishing coordinated scheduling of the border users in the service cell by the service cell and the coordinated cell; and finishing the scheduling for the central user in the service cell in the remained resource of the service cell. According to the scheduling method provided by the invention, the throughput of border UE (User Equipment) of a cell is increased and the average throughput of the whole cell is further increased.
Description
Technical field
The present invention relates to wireless communication field, the dispatching method and the system of a plurality of cell coordination transmission in particularly a kind of senior Long Term Evolution (Long Term Evolution Advanced abbreviates LTE-A as) system.
Background technology
(the Radiocommunication Sector of International Telecommunicaiton Union of radio communication department of International Telecommunications Union; Abbreviate ITU-R as) next generation mobile communication system (International Mobile Telecommunications Advanced abbreviates IMT-Advanced as) has been proposed high data rate and spectrum efficiency performance requirement.Peak rate aspect: IMT-Advanced requires to move at low speed, the focus covering scene is issued to more than the 1Gbit/s; Be issued to 100Mbit/s in high-speed mobile, wide area covering scene.Peaks spectrum efficient aspect: IMT-Advanced requires behavior 15bps/Hz down; Last behavior 6.75bps/Hz.
For in the period planning of ITU; Reach and surpass the demand of IMT-Advanced; Keep simultaneously Long Term Evolution (Long Term Evolution abbreviates LTE as) backwards compatibility preferably, third generation partner program 3GPP has started the related work of LTE-A.Cooperative multipoint transmission CoMP is a key technology among the LTE-A, is considered to a kind of effective way that promotes community marginal user performance and sub-district average throughput.
The CoMP transmission plan of having confirmed at present has two kinds: a kind of is cooperative scheduling/wave beam forming (Coordinated Scheduling/Beamforming abbreviates CS/CB as); Another kind is joint transmission/processing (Joint Transmission/Processing abbreviates JT/JP as).User data exists only in user's the Serving cell in the CS/CB transmission plan, passes through mutual each other schedule information and channel information between each cooperation cell, thereby reaches the purpose of coordinates interference between each cooperation cell.Sharing users data between each cooperation cell in the JT/JP transmission plan; And mutual each other schedule information and channel condition information (channel situation information; Abbreviate CSI as) etc.; To user's transmission signals, the signal of a plurality of cooperation points that the user will receive carries out Combined Treatment on identical running time-frequency resource, thereby promotes the quality of useful signal.
Can know that from the description of above-mentioned two kinds of CoMP transmission plans the enforcement of CoMP technology needs the completion of cooperating jointly of a plurality of sub-districts.Scheduling process is independently of one another between each sub-district of Radio Access Network in the prior art, does not have terminal use's schedule information mutual, and the user who therefore is in cell edge very easily receives the interference of neighbor cell homogenous frequency signal, causes systematic function to descend.
Summary of the invention
Main purpose of the present invention is to provide a kind of dispatching method and system of collaborative transmission, to address the above problem at least.
According to an aspect of the present invention, a kind of method of scheduling of collaborative transmission is provided, comprises: Serving cell is divided into central user and edge customer with user in the said Serving cell, and confirms the cooperation district of said edge customer; The common cooperative scheduling of accomplishing said Serving cell inward flange user of said Serving cell and said cooperation district, and the scheduling of central user in the completion Serving cell in the surplus resources of said Serving cell.
Further; Said Serving cell is divided into central user and edge customer with user in the said Serving cell, and confirms that the step of the cooperation district of said edge customer comprises: said Serving cell all users in said Serving cell issue the signal strength measurement request; All users are with the said Serving cell of reporting measuring result in the said Serving cell; Said Serving cell compares said measurement result and preset thresholding one; All users in the said Serving cell are divided into edge customer and central user, and with the measurement result of said edge customer and the cooperation district of the relatively more definite said edge customer of preset thresholding two;
Further, said signal strength measurement request comprises neighbor cell list and the measured value that said edge customer need be measured; Said neighbor cell list is specified by Serving cell; Said measured value can be one or more of following parameter: the amount of Reference Signal Received Power RSRP, Reference Signal Received Quality RSRQ, the said Serving cell transmit signal strength of any sign; Said predetermined threshold value is confirmed by system emulation or is got empirical value.
Further; Said Serving cell is confirmed also to comprise behind the cooperation district of all edge customers in the said Serving cell: said Serving cell is to said edge customer transmitting channel feedback request; Said edge customer is given Serving cell by said channel feedback request with the reporting channel information of said cooperation district, and said Serving cell is classified to the channel information of said cooperation district.
Further, said channel feedback request comprises the cooperation district information of said edge customer; It is according to the sub-district ID that comprises in the said channel information channel information to be divided into two types of identical eNodeB and different e NodeB that said Serving cell is classified to the channel information of said cooperation district.
Further, the common cooperative scheduling of accomplishing said Serving cell inward flange user of said Serving cell and said cooperation district, and the step that central user is dispatched in the completion Serving cell in the surplus resources of said Serving cell comprises:
The said edge customer of said Serving cell pre-scheduling is for said edge customer distributes frequency domain resource and entry-into-force time of this pre-scheduling result is set according to the said channel information classification situation of said edge customer feedback;
Mutual said pre-scheduling result of said Serving cell and each cooperation district and said channel information;
Said Serving cell and said cooperation district check respectively whether said pre-scheduling resource has overlapping and regain precoding vectors in the resource lap position;
Whether said this scheduling of Serving cell inspection constantly has the pre-scheduling result of edge customer to come into force; The scheduling result that then issues said edge customer and upgrade the remaining available resource of sub-district if said result enters into force, scheduling central user and issue said central user scheduling result on said remaining available resource then according to said scheduling result.
Further; The said step that this pre-scheduling result's entry-into-force time is set comprises: if the channel information of said edge customer feedback all belongs to identical eNodeB; Less pre-scheduling entry-into-force time as a result then is set, said less pre-scheduling as a result the entry-into-force time greater than dispatching cycle; If the channel information of said edge customer feedback partly or entirely belongs to different e NodeB; The pre-scheduling that then setting is bigger is the entry-into-force time as a result, and the entry-into-force time guarantees that said pre-scheduling result and said channel information are mutual between the X2 mouth as a result in said bigger pre-scheduling.
According to another aspect of the present invention, a kind of system of scheduling of collaborative transmission is provided, comprises: scheduler module, be arranged in eNodeB, be used for accomplishing the scheduling of Serving cell edge customer and central user; Executive Module is arranged in UE, is used to measure metrical information and the said metrical information of the said user's scheduling feedback to said Serving cell.
Further, said scheduler module also comprises: the user grouping unit is used for said Serving cell user is divided into Cell Edge User and Cell Center User; Collaborative collection is confirmed the unit, is used for the cooperation district that said Serving cell is confirmed said edge customer; The Data Receiving unit is used for the channel information that said Serving cell receives said edge customer feedback; The scheduling of resource unit is used for said Serving cell and handles to the edge customer pre-scheduling and to the scheduling of central user; The information interaction unit is used for mutual required scheduling result and channel information between said Serving cell and said each cooperation district; The precoding computing unit is used for said Serving cell calculating it is issued the precoding vectors that data are handled; Descending transmitting element is used for the scheduling result information that said Serving cell issues said user.
Further, said Executive Module also comprises: measuring unit is used for the measurement request that said Serving cell user carries out said Serving cell; Feedback unit is used for said Serving cell user with the said Serving cell of corresponding result back.
Dispatching method provided by the invention and system can carry out Unified Treatment to UE and the common UE that uses CoMP, are easy in existing LTE system, realize the multi-cell synergetic transmission to cell edge UE; Position in Serving cell and neighbor cell UE use same frequency resource; Adopt the inventive method to carry out downlink data and handle the same frequency interference that can reduce cell edge UE; Thereby improve the throughput of cell edge UE, further improve the average throughput of whole sub-district.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the application scenarios sketch map of the descending multi-cell synergetic transmission of prior art;
Fig. 2 is the intra-eNodeB CoMP sketch map of the embodiment of the invention;
Fig. 3 is the inter-eNodeB CoMP sketch map of the embodiment of the invention;
Fig. 4 is the dispatching method schematic flow sheet of the embodiment of the invention;
Fig. 5 is the edge UE scheduling flow sketch map of the embodiment of the invention;
Fig. 6 is the center UE scheduling flow sketch map of the embodiment of the invention;
Fig. 7 is the dispatching patcher structural representation of the embodiment of the invention;
Fig. 8 is the dispatching patcher preferred structure sketch map of the embodiment of the invention;
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
According to embodiments of the invention, a kind of dispatching method of collaborative transmission is provided, of Fig. 4, comprising:
Step S101: Serving cell is divided into central user and edge customer with user in the said Serving cell, and confirms the cooperation district of said edge customer;
Step S102: the common cooperative scheduling of accomplishing said Serving cell inward flange user of said Serving cell and said cooperation district, and the scheduling of central user in the completion Serving cell in the surplus resources of said Serving cell.
Through this embodiment, be easy in existing LTE system, realize multi-cell synergetic transmission, thereby the same frequency that reduces cell edge UE disturbs, improves the throughput of cell edge UE, further improves the average throughput of whole sub-district to cell edge UE.
Step S101 can realize through following mode: said Serving cell all users in said Serving cell issue the signal strength measurement request; All users are with the said Serving cell of reporting measuring result in the said Serving cell; Said Serving cell relatively is divided into edge customer and central user with all users in the said Serving cell with said measurement result and preset thresholding one, and with the measurement result of said edge customer and the cooperation district of the relatively more definite said edge customer of preset thresholding two.
Further, said signal strength measurement request comprises neighbor cell list and the measured value that said edge customer need be measured; Said neighbor cell list is specified by Serving cell; Said measured value can be one or more of following parameter: the amount of Reference Signal Received Power RSRP, Reference Signal Received Quality RSRQ, the said Serving cell transmit signal strength of any sign; Said predetermined threshold value is confirmed by system emulation or is got empirical value.
Further; Said Serving cell is confirmed also to comprise behind the cooperation district of all edge customers in the said Serving cell: said Serving cell is to said edge customer transmitting channel feedback request; Said edge customer is given Serving cell by said channel feedback request with the reporting channel information of said cooperation district, and said Serving cell is classified to the channel information of said cooperation district.
Further, said channel feedback request comprises the cooperation district information of said edge customer; It is according to the sub-district ID that comprises in the said channel information channel information to be divided into two types of identical eNodeB and different e NodeB that said Serving cell is classified to the channel information of said cooperation district.
Step S102 can realize through following mode:
The said edge customer of said Serving cell pre-scheduling is for said edge customer distributes frequency domain resource and entry-into-force time of this pre-scheduling result is set according to the said channel information classification situation of said edge customer feedback;
Mutual said pre-scheduling result of said Serving cell and each cooperation district and said channel information;
Said Serving cell and said cooperation district check respectively whether said scheduling resource has overlapping and regain precoding vectors in the resource lap position;
Whether said this scheduling of Serving cell inspection constantly has the pre-scheduling result of edge customer to come into force; The scheduling result that then issues said edge customer and upgrade the remaining available resource of sub-district if said result enters into force, scheduling central user and issue said central user scheduling result on said remaining available resource then according to said scheduling result.
Further; The said step that this pre-scheduling result's entry-into-force time is set comprises: if the channel information of said edge customer feedback all belongs to identical eNodeB; Less pre-scheduling entry-into-force time as a result then is set, said less pre-scheduling as a result the entry-into-force time greater than dispatching cycle; If the channel information of said edge customer feedback partly or entirely belongs to different e NodeB, the pre-scheduling that then setting is bigger is the entry-into-force time as a result, and the entry-into-force time guarantees that said pre-scheduling result is mutual between the X2 mouth as a result in said bigger pre-scheduling.
Fig. 1 is the application scenarios sketch map of descending multi-cell synergetic transmission; As shown in the figure; A plurality of sub-districts of collaborative transmission can be that different districts under the same eNodeB is (like cooperation district Cell1 and the Cell2 of UE1 and UE2 in the dotted line circle; All belong to eNodeB1), this multi-cell coordination mode is called intra-eNodeB CoMP; A plurality of sub-districts of collaborative transmission also can be the sub-districts (cooperation district Cell3 and Cell4 like UE3 in the solid circles and UE4 belong to eNodeB2 and eNodeB3 respectively) under the different e NodeB, and this multi-cell coordination mode is called inter-eNodeB CoMP.
Embodiment one
As shown in Figure 2; Present embodiment is the intra-eNodeB CoMP of a LTE system transmission sketch map, and Cell1 and Cell2 all belong to eNodeB1, and each bandwidth of cell is 5M; Corresponding 25 Resource Block (Resources Block abbreviates RB as, is the resource allocation unit in the LTE system).
At first; Cell1 (comprises cell list and measured value that needs are measured to all user's strength of transmitted signals measurement request wherein; Measured value is RSRP/RSRQ or any amount that can characterize the sub-district transmit signal strength); After Cell1 receives the measurement result of each reporting of user, relatively determine the edge customer that UE1 is Cell1 with preset thresholding one, and with the measurement result of UE1 and the cooperative cell set of the relatively more definite UE1 of preset thresholding two; Cell2 confirms that UE2 is the edge customer of Cell2 after carrying out the processing identical with Cell1, and obtains the cooperative cell set of UE2;
Wherein predetermined threshold value can be the result or the empirical value of system emulation, and Cell1 confirms that finally Cell2 is the cooperation district of UE1; In like manner Cell2 confirms that finally Cell1 is the cooperation district of UE2;
Cell1 and Cell2 issue the channel feedback request to UE1 and UE2 respectively, comprise the cooperation district tabulation of UE1 and UE2 respectively.UE1 feeds back to Cell1 with the estimated value of channel H11, H12 then; UE2 feeds back to Cell2 with the estimated value of channel H21, H22.
Step 2; The scheduling process of edge UE is as shown in Figure 5, at scheduling T constantly, after Cell1 receives the full bandwidth channel H11, H12 of current scheduling user UE1 feedback; According to the sub-district relevant information of carrying in the channel information (like sub-district ID), confirm that said channel information belongs to identical eNodeB; It is UE1 continuous 10 RB of having distributed index 6～index 15 (if the resource allocation principle can be counted mean allocation or distributes according to actual volume by UE) that Cell1 carries out pre-scheduling to UE1;
After in like manner Cell2 receives the full bandwidth channel H21, H22 of UE2 feedback,, confirm that said channel information belongs to identical eNodeB according to the sub-district relevant information of carrying in the channel information (like sub-district ID); It is continuous 10 RB that UE2 has also distributed index 6～index 15 that Cell2 carries out pre-scheduling to UE2;
Because the UE feedback channel of Cell1 and Cell2 belongs to same eNodeB; Interactive information can obtain from the shared memory of eNodeB1; Time delay is less can the entry-into-force time be provided with a little bit smaller (like 3ms) as a result with UE1 and UE2 pre-scheduling; Greater than (being dispatching cycle with the subframe in the LTE system, 1ms) getting final product dispatching cycle;
Cell1 obtains UE2 pre-scheduling information and the H21 of Cell2 from the shared memory of eNodeB1; Relatively pre-scheduling INFORMATION DISCOVERY resource on RB index 6～index 15 of UE1 and UE2 is overlapping; Make an uproar than (Signal to Leakage Noise Ratio in the leakage of resource position overlapped utilization letter; Abbreviating SLNR as) criterion calculates the precoding vectors of each RB; Corresponding precoding vectors is confirmed in pre-coding matrix indication (Precoding Matrix Indicator abbreviates PMI as) according to UE1 feedback on the nonoverlapping RB of resource, preserve then UE1 the pre-scheduling result and distribute the RB corresponding precoding vector;
It is following than the formula of criterion acquisition precoding vectors to utilize the letter leakage to make an uproar:
Wherein,
The preceding m of matrix R is asked in expression
iThe pairing characteristic vector of individual eigenvalue of maximum; m
iRepresent i the employed number of plies of the UE in the sub-district;
H
I, jThe expression Serving cell is to the channel of this UE, H
I, jExpression cooperation district j is to the channel of this UE, and α I representes the noise that this UE receives.
It is that the signal power that makes Serving cell leak into the adjacent area minimizes that letter leaks the thought of making an uproar than criterion; Thereby the same frequency that reduces the adjacent area user disturbs, and has only in the present invention when Serving cell and cooperation district use same frequency resources transmission data and uses this criterion to obtain the precoding vectors of relevant position.
Same Cell2 obtains UE1 pre-scheduling information and the H12 of Cell1 from the shared memory of eNodeB1; Relatively pre-scheduling INFORMATION DISCOVERY resource on RB index 6～index 15 of UE1 and UE2 is overlapping; Utilize the SLNR criterion to obtain the precoding vectors of each RB in the resource position overlapped; Pre-coding matrix indication PMI according to UE2 feedback on the nonoverlapping RB of resource confirms corresponding precoding vectors, preserve then UE2 the pre-scheduling result and distribute the RB corresponding precoding vector;
The scheduling process of center UE is as shown in Figure 6; At scheduling moment T+3; The pre-scheduling result of UE1 and UE2 comes into force; The state that Cell1 issues the scheduling result of UE1 and puts RB index 6～index 15 is changed to usefulness, is the center UE Resources allocation of scheduling this moment then on RB index 0～index 5 and RB index 16～index 24;
The state that same Cell2 issues the scheduling result of UE2 and puts RB index 6～index 15 is changed to usefulness, be the center UE Resources allocation of this moment dispatching then on RB index 0～index 5 and RB index 16～index 24.
In embodiments of the present invention; Cell1 and Cell2 adopt SLNR criterion acquisition precoding vectors to carry out wave beam tax row to sending data on resource lap position RB index 6～index 15; Thereby reduce the same frequency of cooperation district edge customer is disturbed, improve the performance of Cell Edge User.
Embodiment two
As shown in Figure 3, be the inter-eNodeB CoMP of the LTE system transmission sketch map of the embodiment of the invention, Cell3 and Cell4 belong to eNodeB2 and eNodeB3 respectively, and each bandwidth of cell is 5M, corresponding 25 RB.
At first; Cell3 (comprises cell list and measured value that needs are measured to all user's strength of transmitted signals measurement request wherein; Measured value is RSRP/RSRQ or any amount that can characterize the sub-district transmit signal strength); After Cell3 receives the measurement result of each reporting of user, relatively determine the edge customer that UE3 is Cell3 with preset thresholding one, and with the measurement result of UE3 and the cooperative cell set of the relatively more definite UE3 of preset thresholding two; Cell4 confirms that UE4 is the edge customer of Cell4 after carrying out the processing identical with Cell3, and obtains the cooperative cell set of UE4;
Wherein predetermined threshold value can be the result or the empirical value of system emulation, and Cell3 confirms that finally Cell4 is the cooperation district of UE3; In like manner Cell4 confirms that finally Cell3 is the cooperation district of UE4;
Cell3 and Cell4 issue the channel feedback request to UE3 and UE4 respectively, comprise the cooperation district tabulation of UE3 and UE4 respectively.UE3 feeds back to Cell3 with the estimated value of channel H33, H34 then; UE4 feeds back to Cell4 with the estimated value of channel H43, H44.
Step 2; The scheduling process of edge UE is as shown in Figure 5; At scheduling moment T, Cell3 receives full bandwidth channel H33, the H34 of current scheduling user UE3 feedback, confirms that according to the sub-district relevant information of carrying in the channel information (like sub-district ID) said channel information belongs to different e NodeB; It is UE3 continuous 8 RB of having distributed index 0～index 7 (if the resource allocation principle can be counted mean allocation or distributes according to actual volume by UE) that Cell3 carries out pre-scheduling to UE3;
In like manner Cell4 receives full bandwidth channel H43, the H44 of UE4 feedback, confirms that according to the sub-district relevant information of carrying in the channel information (like sub-district ID) said channel information belongs to different e NodeB; It is continuous 6 RB that UE4 has distributed index 0～index 5 that Cell4 carries out pre-scheduling to UE4;
Because the UE feedback channel of Cell3 and Cell4 belongs to different eNodeB; Must be through the X2 interface interactive information; Consider on the X2 time delay with UE3 and UE4 pre-scheduling as a result the entry-into-force time (like 20ms) can be set more greatly, to guarantee before the pre-scheduling result comes into force, can to receive interactive information each other between the cooperation district;
Cell3 receives UE4 pre-scheduling information and the H43 that Cell4 comes alternately through X2 interface; Relatively pre-scheduling INFORMATION DISCOVERY resource on RB index 0～index 5 of UE3 and UE4 is overlapping; Utilize the SLNR criterion to obtain the precoding vectors of each RB in the resource position overlapped; Pre-coding matrix indication PMI according to UE3 feedback on the nonoverlapping RB of resource confirms corresponding precoding vectors, preserve then UE3 the pre-scheduling result and distribute the RB corresponding precoding vector;
Same Cell4 receives UE3 pre-scheduling information and the H34 that Cell3 comes alternately through X2 interface; Relatively pre-scheduling INFORMATION DISCOVERY resource on RB index 0～index 5 of UE3 and UE4 is overlapping; Utilize the SLNR criterion to obtain the precoding vectors of each RB in the resource position overlapped; Pre-coding matrix indication PMI according to UE4 feedback on the nonoverlapping RB of resource confirms corresponding precoding vectors, preserve then UE4 the pre-scheduling result and distribute the RB corresponding precoding vector;
The scheduling process of center UE is as shown in Figure 6; At scheduling moment T+20; The pre-scheduling result of UE3 and UE4 comes into force, and the state that Cell3 issues the scheduling result of UE3 and puts RB index 0～index 7 is changed to usefulness, is the center UE Resources allocation of scheduling this moment then on RB index 8～index 24;
The state that same Cell4 issues the scheduling result of UE4 and puts RB index 0～index 5 is changed to usefulness, be the center UE Resources allocation of this moment dispatching then on RB index 6～index 24.
In embodiments of the present invention; Cell3 and Cell4 adopt SLNR criterion acquisition precoding vectors to carry out wave beam tax row to sending data on resource lap position RB index 0～index 5; Thereby reduce the same frequency of cooperation district edge customer is disturbed, improve the performance of Cell Edge User.
According to embodiments of the invention, a kind of dispatching patcher of collaborative transmission is provided, as shown in Figure 7, this dispatching patcher comprises: scheduler module 2 and Executive Module 4 are described in detail in the face of The above results down.
Scheduler module 2 is arranged in eNodeB, is used for accomplishing the scheduling of Serving cell edge customer and central user; Executive Module 4 is connected to scheduler module 2, is arranged in UE, is used to measure metrical information and the said metrical information of the said user's scheduling feedback to said Serving cell.
Preferably, as shown in Figure 8, this dispatching patcher also comprises following structure:
Scheduler module 2 comprises that also user grouping unit 21, collaborative collection are confirmed unit 22, Data Receiving unit 23, scheduling of resource unit 24, information interaction unit 25, precoding unit 26 and descending transmitting element 27, wherein:
User grouping unit 21 is used for said Serving cell user is divided into Cell Edge User and Cell Center User; Collaborative collection is confirmed unit 22, is used for the cooperation district that said Serving cell is confirmed said edge customer; Data Receiving unit 23 is used for the channel information that said Serving cell receives said edge customer feedback; Scheduling of resource unit 24 is used for said Serving cell and handles to the edge customer pre-scheduling and to the scheduling of central user; Information interaction unit 25 is used for mutual required scheduling result and channel information between said Serving cell and said each cooperation district; Precoding computing unit 26 is used for said Serving cell calculating it is issued the precoding vectors that data are handled; Descending transmitting element 27 is used for the scheduling result information that said Serving cell issues said user.
Executive Module 4 also comprises measuring unit 41 and feedback unit 42, wherein
Measuring unit 41 is used for the measurement request that said Serving cell user carries out said Serving cell; Feedback unit 42 is used for said Serving cell user with the said Serving cell of corresponding result back.
From above description; Can find out; The present invention has realized following technique effect: user in the Differentiated Services sub-district, and the edge UE in the said Serving cell is dispatched with cooperation district makes the same frequency of cell edge UE disturb and reduces; Thereby improve the throughput of cell edge UE, further improve the average throughput of whole sub-district.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the dispatching method of a collaborative transmission is characterized in that, comprising:
Serving cell is divided into central user and edge customer with user in the said Serving cell, and confirms the cooperation district of said edge customer;
The common cooperative scheduling of accomplishing said Serving cell inward flange user of said Serving cell and said cooperation district, and the scheduling of central user in the completion Serving cell in the surplus resources of said Serving cell.
2. the method for claim 1 is characterized in that, said Serving cell is divided into central user and edge customer with user in the said Serving cell, and confirms that the step of the cooperation district of said edge customer comprises:
Said Serving cell all users in said Serving cell issue the signal strength measurement request; All users are with the said Serving cell of reporting measuring result in the said Serving cell; Said Serving cell compares said measurement result and preset thresholding one; All users in the said Serving cell are divided into edge customer and central user, and with the measurement result of said edge customer and the cooperation district of the relatively more definite said edge customer of preset thresholding two.
3. method as claimed in claim 2 is characterized in that,
Said signal strength measurement request comprises neighbor cell list and the measured value that said edge customer need be measured; Said neighbor cell list is specified by Serving cell; Said measured value can be one or more of following parameter: the amount of Reference Signal Received Power RSRP, Reference Signal Received Quality RSRQ, the said Serving cell transmit signal strength of any sign;
Said predetermined threshold value is confirmed by system emulation or is got empirical value.
4. method as claimed in claim 2 is characterized in that, said Serving cell is confirmed also to comprise behind the cooperation district of all edge customers in the said Serving cell:
Said Serving cell is to said edge customer transmitting channel feedback request, and said edge customer is given Serving cell by said channel feedback request with the reporting channel information of said cooperation district, and said Serving cell is classified to the channel information of said cooperation district.
5. method as claimed in claim 4 is characterized in that,
Said channel feedback request comprises the cooperation district information of said edge customer;
It is according to the sub-district ID that comprises in the said channel information channel information to be divided into two types of identical eNodeB and different e NodeB that said Serving cell is classified to the channel information of said cooperation district.
6. the method for claim 1; It is characterized in that; The common cooperative scheduling of accomplishing said Serving cell inward flange user of said Serving cell and said cooperation district, and the step that central user is dispatched in the completion Serving cell in the surplus resources of said Serving cell comprises:
The said edge customer of said Serving cell pre-scheduling is for said edge customer distributes frequency domain resource and entry-into-force time of this pre-scheduling result is set according to the said channel information classification situation of said edge customer feedback;
Mutual said pre-scheduling result of said Serving cell and each cooperation district and said channel information;
Said Serving cell and said cooperation district check respectively whether said pre-scheduling resource has overlapping and regain precoding vectors in the resource lap position;
Whether said this scheduling of Serving cell inspection constantly has the pre-scheduling result of edge customer to come into force; The scheduling result that then issues said edge customer and upgrade the remaining available resource of sub-district if said result enters into force, scheduling central user and issue said central user scheduling result on said remaining available resource then according to said scheduling result.
7. method as claimed in claim 6 is characterized in that, the said step that this pre-scheduling result's entry-into-force time is set comprises:
If the channel information of said edge customer feedback all belongs to identical eNodeB, less pre-scheduling entry-into-force time as a result then is set, said less pre-scheduling as a result the entry-into-force time greater than dispatching cycle; If the channel information of said edge customer feedback partly or entirely belongs to different e NodeB; The pre-scheduling that then setting is bigger is the entry-into-force time as a result, and the entry-into-force time guarantees that said pre-scheduling result and said channel information are mutual between the X2 mouth as a result in said bigger pre-scheduling.
8. the dispatching patcher of a collaborative transmission is characterized in that, comprising:
Scheduler module is used for accomplishing the scheduling of Serving cell edge customer and central user;
Executive Module is used to measure metrical information and the said metrical information of the said user's scheduling feedback to said Serving cell.
9. system as claimed in claim 8 is characterized in that, said scheduler module also comprises:
The user grouping unit, be used for said Serving cell wherein the user be divided into Cell Edge User and Cell Center User;
Collaborative collection is confirmed the unit, is used for the cooperation district that said Serving cell is confirmed said edge customer;
The Data Receiving unit is used for the channel information that said Serving cell receives said edge customer feedback;
The scheduling of resource unit is used for said Serving cell and handles to the edge customer pre-scheduling and to the scheduling of central user;
The information interaction unit is used for mutual required scheduling result and channel information between said Serving cell and said each cooperation district;
Precoding unit is used for said Serving cell and obtains it is issued the precoding vectors that data are handled;
Descending transmitting element is used for the scheduling result information that said Serving cell issues said user.
10. system as claimed in claim 8 is characterized in that, said Executive Module also comprises:
Measuring unit is used for the measurement request that said Serving cell user carries out said Serving cell;
Feedback unit is used for said Serving cell user with the said Serving cell of corresponding result back.
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| CN201010519643.9A CN102457358B (en) | 2010-10-22 | 2010-10-22 | A kind of dispatching method of cooperative transmission and system |
| PCT/CN2011/078142 WO2012051878A1 (en) | 2010-10-22 | 2011-08-09 | Scheduling method and system for coordinated transmission |
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| WO2012051878A1 (en) | 2012-04-26 |
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