CN102378308A - Coordinated multi-point transmission (CoMP) system and method for selecting primary cell - Google Patents
Coordinated multi-point transmission (CoMP) system and method for selecting primary cell Download PDFInfo
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- CN102378308A CN102378308A CN2010102504315A CN201010250431A CN102378308A CN 102378308 A CN102378308 A CN 102378308A CN 2010102504315 A CN2010102504315 A CN 2010102504315A CN 201010250431 A CN201010250431 A CN 201010250431A CN 102378308 A CN102378308 A CN 102378308A
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- H04W48/20—Selecting an access point
Abstract
The invention discloses a method for selecting a primary cell in a coordinated multi-point transmission (CoMP) system. The method comprises the following steps that: when user equipment (UE) informs an evolved Node B (eNB) in which an initially-accessed cell is located of a situation that serves are required to be initiated in other cells, the eNB determines the initially-accessed cell as a primary cell; and the eNB in which the current primary cell is located determines a primary cell in all cells which have service connection with the UE according to a primary cell selection mode. The invention also discloses a CoMP system. By using the scheme of the invention, an important problem that the CoMP system determines a primary cell in a plurality of cells can be solved, meanwhile, the selection of the primary cell is more reasonable, and system resources are used fully, thereby enhancing the satisfaction degree of user feeling and ensuring the interests of operators.
Description
Technical field
The present invention relates to the cooperative multipoint transmission technology in the radio communication, relate in particular to the method for a kind of cooperative multicast system and selection main plot.
Background technology
Cooperative multipoint transmission (CoMP; Coordinated multi-point transmission) technology is a kind of technology that produces for the throughput that improves edge customer, and (UE is when UserEquipment) being in cell edge at subscriber equipment especially; UE will use a plurality of carrier waves to communicate; Thereby improve the throughput of edge customer, improve the income of operator, improve user experience.In the CoMP system, network node comprises evolution base station (eNB, Evolved Node B) and access point (AP, Access point); Each one or more sub-district of eNB management maybe be to concentrate or distributed one or more AP that is scattered here and there in each sub-district; ENB carries out connection management through AP and UE.
In the CoMP system, a UE has a plurality of sub-districts and is its service simultaneously, and these sub-districts possibly belong to same eNB, also possibly belong to different eNB.Because UE communicates with a plurality of sub-districts, in these a plurality of sub-districts, have a sub-district and processes such as Radio Link foundations of UE, reprovision are carried out major control as the master control sub-district, this sub-district is the main plot, and remaining sub-district is to assist the sub-district.The main plot is that UE provides basic service and centralized service, and auxilliary sub-district is that UE provides enhancing business and Distributed Services.
When UE only initiates business in a sub-district; The processing of CoMP system and existing communication systems compliant, but when the sub-district of serving the professional UE of initiation was two or more, the situation of main plot can appear confirming; Possibly cause UE to fall into chaos, influence user's impression.At present, for how confirming in the CoMP system that the main plot does not also propose clear and definite solution.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of CoMP system and selects the method for main plot, can solve the CoMP system major issue of main plot of in a plurality of sub-districts, making a strategic decision, and can make the selection of main plot more reasonable, makes full use of system resource.
For achieving the above object, technical scheme of the present invention is achieved in that
Select the method for main plot in a kind of CoMP provided by the invention system, this method comprises:
When UE need initiate business in other sub-districts to the place, sub-district of initial access eNB notice, said eNB confirmed as the main plot with the sub-district of said initial access;
Place, current main plot eNB all with sub-district that UE has business to be connected in confirm the main plot according to the main plot selection mode.
In the such scheme, said main plot selection mode comprises: competitive way and appointment mode;
Said competitive way is: all have the satisfaction degree of the professional sub-district that is connected to decision rule with UE by place, current main plot eNB real-time statistics, and the sub-district that decision rule is satisfied in selection most is the main plot;
Said appointment mode is: it is the main plot that place, current main plot eNB assigns the new sub-district of inserting, or place, current main plot eNB has with UE at all, and sub-district of assigned at random is the main plot in the professional sub-district that is connected.
In the such scheme; Said main plot selection mode is competitive way, when decision rule is signal quality; Place, current main plot eNB obtains the signal quality that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, and the sub-district of selecting signal quality the best wherein is as the main plot.
In the such scheme; Said main plot selection mode is competitive way, when decision rule is cell load; Current main plot place eNB obtains the loading condition that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface, selects to comprise to be the main plot in the minimum sub-district of interior load value certainly.
In the such scheme; Said main plot selection mode is competitive way, when decision rule is signal quality and cell load; Current main plot place eNB obtains the signal quality S (i) that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, and obtains the loading condition L (i) that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface;
According to S (i) and L (i) factor calculation is selected in each sub-district, said selection factor C (i) is the poor of S (i) and L (i); It is the main plot that said current main plot place eNB selects the maximum sub-district of C (i) value.
In the such scheme; Said main plot selection mode is that competitive way, decision rule are that service interaction is during the time; Place, current main plot eNB discharge with being connected of UE before; Add up the time that has professional sub-district place eNB that is connected and UE to carry out service interaction with UE respectively, selecting the longest sub-district of service interaction time is the main plot.
In the such scheme, said main plot selection mode is the appointment mode of main plot for specifying the new sub-district of inserting, and then when UE newly inserted a sub-district, it was the main plot that current main plot place eNB specifies the sub-district of new access.
A kind of CoMP provided by the invention system, this system comprises: UE, eNB; Wherein,
UE is used for need initiating in other sub-districts to place, the sub-district of initial access eNB notice professional, and the while carries out business with two and two above sub-districts and is connected afterwards;
ENB when being used to place, the sub-district eNB of the initial access of UE, receives when the UE notice need be initiated business in other sub-districts, and the main plot is confirmed as in the sub-district of said initial access; During for place, current main plot eNB, all with sub-district that UE has business to be connected in confirm the main plot according to the main plot selection mode.
In the such scheme; Said main plot selection mode is that competitive way, decision rule are signal quality; When then said eNB is current main plot place eNB; Said eNB obtains the signal quality that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, and the sub-district of selecting signal quality the best wherein is as the main plot;
Accordingly, said UE also is used to measure the signal quality that the professional sub-district that connects is arranged, and reports to current main plot place eNB.
In the such scheme; Said main plot selection mode is that competitive way, decision rule are cell load; When then said eNB is current main plot place eNB; Said eNB obtains the loading condition that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface, and selecting the sub-district that wherein load value is minimum is the main plot.
In the such scheme; Said main plot selection mode is that competitive way, decision rule are signal quality and cell load; When then said eNB is current main plot place eNB; Said eNB obtains the signal quality S (i) that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, and obtains the loading condition L (i) that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface; According to S (i) and L (i) factor calculation is selected in each sub-district, said selection factor C (i) is the poor of S (i) and L (i), and it is the main plot that said current main plot place eNB selects the maximum sub-district of C (i) value.
In the such scheme; Said main plot selection mode is that competitive way, decision rule are the service interaction time; When then said eNB is current main plot place eNB; Said eNB discharge with being connected of UE before, statistics and UE have the professional sub-district that is connected to belong to the time that eNB and UE carry out service interaction respectively, selection the longest sub-district of service interaction time is the main plot.
In the such scheme, said main plot selection mode is the appointment mode of main plot for specifying the new sub-district of inserting, and then when UE newly inserted a sub-district, when said eNB was current main plot place eNB, it was the main plot that said eNB specifies the sub-district of new access.
The method of CoMP system provided by the invention and selection main plot need be when other sub-districts initiations be professional to the place, sub-district of initial access eNB notice as UE, and said eNB confirms as the main plot with the sub-district of said initial access; Place, current main plot eNB all with sub-district that UE has business to be connected in confirm the main plot according to the main plot selection mode; So, can solve the CoMP system major issue of main plot of in a plurality of sub-districts, making a strategic decision, and can make the selection of main plot more reasonable, make full use of system resource, improve the satisfaction of user's impression, also guarantee benefits of operators.
Description of drawings
Fig. 1 realizes selecting in the CoMP system schematic flow sheet of the method for main plot for the present invention;
Fig. 2 is the structural representation of the CoMP system of the present invention's realization;
Fig. 3 is the structural representation of CoMP system in the embodiment of the invention one, two, three;
Fig. 4 is the schematic flow sheet that the embodiment of the invention one realizes selecting in the CoMP system method of main plot;
Fig. 5 is the schematic flow sheet that the embodiment of the invention two realizes selecting in the CoMP system method of main plot;
Fig. 6 is the schematic flow sheet that the embodiment of the invention three realizes selecting in the CoMP system method of main plot;
Fig. 7 is the structural representation of CoMP system in the embodiment of the invention four, five, six;
Fig. 8 is the schematic flow sheet that the embodiment of the invention four realizes selecting in the CoMP system method of main plot;
Fig. 9 is the schematic flow sheet that the embodiment of the invention five realizes selecting in the CoMP system method of main plot;
Figure 10 is the schematic flow sheet that the embodiment of the invention six realizes selecting in the CoMP system method of main plot.
Embodiment
Basic thought of the present invention is: need be when other sub-districts initiations be professional as UE to the place, sub-district of initial access eNB notice, and said eNB confirms as the main plot with the sub-district of said initial access; Place, current main plot eNB all with sub-district that UE has business to be connected in confirm the main plot according to the main plot selection mode.
Said main plot selection mode comprises: competitive way and appointment mode; Said competitive way is meant: all have the satisfaction degree of the professional sub-district that is connected to decision rule with UE by place, current main plot eNB real-time statistics, and the sub-district that decision rule is satisfied in final selection most is the main plot.Wherein, the degree that satisfies decision rule when each sub-district changes or when sub-district number increase and decrease occurring, all may cause the main plot competition; Said decision rule can be the signal quality that UE measures, and also can be cell load of each sub-district etc.Said appointment mode is meant: it is the main plot that place, current main plot eNB assigns the new sub-district of inserting, or place, current main plot eNB has with UE at all, and sub-district of assigned at random is the main plot in the professional sub-district that is connected.
Through accompanying drawing and specific embodiment the present invention is done further detailed description below.
The present invention realizes selecting in the CoMP system method of main plot, and as shown in Figure 1, this method comprises following step:
Step 101:UE is initial to insert a sub-district, and successfully initiates professional;
Step 102: when UE need initiate business in other sub-districts, give initial place, the sub-district eNB that inserts with the reporting measuring result of said other sub-districts;
Wherein, said measurement result comprises signal quality, loading condition etc.
Step 103: after initial place, the sub-district eNB that inserts received the measurement result of other sub-districts that UE reports, when measurement result satisfied access conditions, said eNB confirmed as the main plot with the sub-district of said initial access, and said other sub-districts of notice UE access;
In this step, the main plot is confirmed as in the sub-district that said eNB will initially insert, that is: said eNB controls processes such as the Radio Link foundation of UE, reprovisions, for UE provides basic service and centralized service.
Step 104: when UE when carrying out service communication with two or more sub-districts, place, current main plot eNB all with sub-district that UE has business to be connected in confirm the main plot according to the main plot selection mode;
For example; Said main plot selection mode is competitive way, when decision rule is signal quality; Current main plot place eNB obtains the signal quality that the professional sub-district that is connected is arranged with UE through the measurement and report of UE; Select the best sub-district of signal quality wherein as the main plot; That is: current main plot place eNB has the eNB of the professional sub-district that is connected to send the main plot modification information to UE and with UE, and said main plot modification information comprises that the best sub-district of the said signal quality of indication is the indication information of main plot etc.;
After the eNB of the best sub-district of said signal quality receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service according to indication information wherein; Said UE and with after UE has the eNB of other sub-districts of being connected of business to receive the main plot modification information according to indication information wherein, is known main plot after changing, returns acknowledge message; When the signal quality of current main plot is best, do not carry out the change of main plot.
For another example: said main plot selection mode is competitive way, when decision rule is cell load; Current main plot place eNB obtains the loading condition that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface; Selection comprises being the main plot in the minimum sub-district of interior load value certainly; That is: when the load value in current main plot is not minimum; Current main plot place eNB has the eNB of the professional sub-district that is connected to send the main plot modification information to UE and with UE, and said main plot modification information comprises that the minimum sub-district of the said load value of indication is the indication information of main plot etc.;
After the eNB of the minimum sub-district of said load value receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service according to indication information wherein; Said UE and with after UE has the eNB of other sub-districts of being connected of business to receive the main plot modification information according to indication information wherein, is known main plot after changing, returns acknowledge message; When the load value in current main plot is minimum, do not carry out the change of main plot.
And for example: said main plot selection mode is competitive way, when decision rule is signal quality and cell load, and current main plot place eNB obtains the signal quality that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, is represented by S (i); The big more expression signal quality of its value is good more; Be positive factor, and obtain the loading condition that the eNB of the professional sub-district that is connected is arranged with UE, represent by L (i) through S1 or X2 interface; The big more expression load of its value is big more; Be negative factors, factor calculation is selected in each sub-district, that is: select factor C (i)=S (i)-L (i); It is the main plot that said current main plot place eNB selects the maximum sub-district of C (i) value; That is: when the C of current main plot (i) value is not maximum; Current main plot place eNB has the eNB of the professional sub-district that is connected to send the main plot modification information to UE and with UE, and said main plot modification information comprises that the maximum sub-district of indication said C (i) value is the indication information of main plot etc.;
After the eNB of the maximum sub-district of said C (i) value receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service according to indication information wherein; Said UE and with after UE has the eNB of other sub-districts of being connected of business to receive the main plot modification information according to indication information wherein, is known main plot after changing, returns acknowledge message.
Also as; Said main plot selection mode is the appointment mode of main plot for specifying the new sub-district of inserting; Then when sub-district of the new access of UE, current main plot place eNB is after receiving the measurement and report of UE to new access sub-district, and specifying the new sub-district of inserting is the main plot; That is: current main plot place eNB has the eNB of the professional sub-district that is connected to send the main plot modification information to UE and with UE, and said main plot modification information comprises that the sub-district of indicating up-to-date access is the indication information of main plot etc.;
After the eNB of the sub-district of said up-to-date access receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service according to indication information wherein; Said UE and with after UE has the eNB of other sub-districts of being connected of business to receive the main plot modification information according to indication information wherein, is known main plot after changing, returns acknowledge message.
Be to realize that said method, the present invention also provide a kind of CoMP system, as shown in Figure 2, this system comprises: UE, eNB; Wherein,
UE is used for need initiating in other sub-districts to place, the sub-district of initial access eNB notice professional, and the while carries out business with two and two above sub-districts and is connected afterwards;
ENB when being used to place, the sub-district eNB of the initial access of UE, receives when the UE notice need be initiated business in other sub-districts, and the main plot is confirmed as in the sub-district of said initial access; During for place, current main plot eNB, all with sub-district that UE has business to be connected in confirm the main plot according to the main plot selection mode;
Concrete; If said main plot selection mode is that competitive way, decision rule are signal quality; When then said eNB is current main plot place eNB; Said eNB obtains the signal quality that the professional sub-district that is connected is arranged with UE through the measurement and report of UE; Select the best sub-district of signal quality wherein as the main plot, that is: said eNB has the eNB of the professional sub-district that is connected to send the main plot modification information to UE and with UE, and said main plot modification information comprises that the sub-district of indicating said signal quality the best is the indication information of main plot etc.;
After the eNB of the best sub-district of said signal quality receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are carried out major control, for UE provides basic service and centralized service according to indication information wherein; Said UE and with after UE has the eNB of other sub-districts of being connected of business to receive the main plot modification information according to indication information wherein, is known main plot after changing, returns acknowledge message;
Accordingly, said UE also is used to measure the signal quality that the professional sub-district that connects is arranged, and reports to current main plot place eNB.
If said main plot selection mode is that competitive way, decision rule are cell load; When then said eNB is current main plot place eNB; Said eNB obtains the loading condition that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface; Selecting the sub-district that wherein load value is minimum is the main plot; That is: when the load value in current main plot was not minimum, said eNB had the eNB of the professional sub-district that is connected to send the main plot modification information to UE and with UE, and said main plot modification information comprises that the minimum sub-district of the said load value of indication is the indication information of main plot etc.;
After the eNB of the minimum sub-district of said load value receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are carried out major control, for UE provides basic service and centralized service according to indication information wherein; Said UE and with after UE has the eNB of other sub-districts of being connected of business to receive the main plot modification information according to indication information wherein, is known main plot after changing, returns acknowledge message.
If said main plot selection mode is that competitive way, decision rule are signal quality and cell load, when then said eNB was current main plot place eNB, said eNB obtained the signal quality that the professional sub-district that is connected is arranged with UE through the measurement and report of UE; By S (i) expression, the big more expression signal quality of its value is good more, is positive factor; And obtain the loading condition that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface; By L (i) expression, the big more expression load of its value is big more, is negative factors; Factor calculation is selected in each sub-district, that is: select factor C (i)=S (i)-L (i); It is the main plot that said current main plot place eNB selects the maximum sub-district of C (i) value; That is: when the C of current main plot (i) value is not maximum; Current main plot place eNB has the eNB of the professional sub-district that is connected to send the main plot modification information to UE and with UE, and said main plot modification information comprises that the maximum sub-district of indication said C (i) value is the indication information of main plot etc.;
After the eNB of the maximum sub-district of said C (i) value receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are carried out major control, for UE provides basic service and centralized service according to indication information wherein; Said UE and with after UE has the eNB of other sub-districts of being connected of business to receive the main plot modification information according to indication information wherein, is known main plot after changing, returns acknowledge message;
Accordingly, said UE also is used to measure the signal quality that the professional sub-district that connects is arranged, and reports to current main plot place eNB.
If said main plot selection mode is that competitive way, decision rule are that service interaction is during the time; Place, current main plot eNB discharge with being connected of UE before; Add up the time that has professional sub-district place eNB that is connected and UE to carry out service interaction with UE respectively, selecting the longest sub-district of service interaction time is the main plot; The time of said service interaction generally is, the time that eNB that formerly inserts and UE carry out service interaction is longer than the eNB of the access in the back and the time that UE carries out service interaction.
If said main plot selection mode is the appointment mode of main plot for specifying the new sub-district of inserting; Then when sub-district of the new access of UE; When said eNB is current main plot place eNB; Said eNB is after receiving the measurement and report of UE to new access sub-district; Specifying the new sub-district of inserting is the main plot, that is: current main plot place eNB has the eNB of the professional sub-district that is connected to send the main plot modification information to UE and with UE, and said main plot modification information comprises that the sub-district of indicating up-to-date access is the indication information of main plot etc.;
After the eNB of the sub-district of said up-to-date access receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service according to indication information wherein; Said UE and with after UE has the eNB of other sub-districts of being connected of business to receive the main plot modification information according to indication information wherein, is known main plot after changing, returns acknowledge message.
Specify the implementation procedure and the principle of method of the present invention below in conjunction with specific embodiment.
Embodiment one:
In the present embodiment, the main plot selection mode is that competitive way, decision rule are signal quality, and is as shown in Figure 3; A sub-district is arranged respectively on eNB1 and the eNB2; The present invention realizes selecting in the CoMP system method of main plot, and as shown in Figure 4, this method comprises following step:
Step 401:UE initially inserts the sub-district on the eNB1 and successfully initiates professional;
Step 402: when the sub-district that UE need be on eNB2 initiates to give eNB1 with the reporting measuring result of the sub-district on the said eNB2 when professional;
Wherein, said measurement result comprises signal quality, loading condition etc.
After step 403:eNB1 received the measurement result of the sub-district on the eNB2 that UE reports, when measurement result satisfied access conditions, as the main plot, and notice UE inserted the sub-district on the eNB2 to said eNB1 with self sub-district;
In this step, as the main plot, that is: said eNB1 controls processes such as the Radio Link foundation of UE, reprovisions said eNB1, for UE provides basic service and centralized service with self sub-district.
Step 404: when UE with eNB1 and eNB2 on sub-district when carrying out service communication, eNB1 obtains the signal quality of the sub-district on eNB1 and the eNB2 through the measurement and report of UE, selects the best sub-district of signal quality wherein as the main plot;
In this step, if this moment, eNB1 cell signal quality was better, the eNB1 sub-district still is the main plot so; If this moment, eNB2 cell signal quality was better, then the main plot changes to the eNB2 sub-district, that is: eNB1 sends the main plot modification information through the X2 mouth to eNB2 and UE, and said main plot modification information comprises that the sub-district on the indication eNB2 is the indication information of main plot etc.; After said eNB2 receives the main plot modification information, according to wherein indication information processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service; UE knows that according to the indication information in the modification information of main plot main plot after changing is eNB2, returns acknowledge message; ENB1 changes to auxilliary sub-district, for UE provides enhancing business and Distributed Services.
Embodiment two:
In the present embodiment, the main plot selection mode is that competitive way, decision rule are loading condition, and is as shown in Figure 3; A sub-district is arranged respectively on eNB1 and the eNB2; The present invention realizes selecting in the CoMP system method of main plot, and as shown in Figure 5, this method comprises following step:
Step 501:UE initially inserts the sub-district on the eNB1 and successfully initiates professional;
Step 502: when the sub-district that UE need be on eNB2 initiates to give eNB1 with the reporting measuring result of the sub-district on the said eNB2 when professional;
Wherein, said measurement result comprises signal quality, loading condition etc.
After step 503:eNB1 received the measurement result of the sub-district on the eNB2 that UE reports, when measurement result satisfied access conditions, as the main plot, and notice UE inserted the sub-district on the eNB2 to said eNB1 with self sub-district;
In this step, as the main plot, that is: said eNB1 controls processes such as the Radio Link foundation of UE, reprovisions said eNB1, for UE provides basic service and centralized service with self sub-district.
Step 504: when UE with eNB1 and eNB2 on sub-district when carrying out service communication, eNB1 obtains the loading condition of the sub-district on the eNB2 through X2 interface, the minizone on self and eNB2 selects the low sub-district of load value as the main plot;
In this step, if this moment, the cell load value on the eNB1 was low, the sub-district on the eNB1 still is the main plot so; If the cell load value on the eNB2 is low, then the main plot changes to the sub-district on the eNB2, that is: eNB1 sends the main plot modification information to UE and eNB2, and said main plot modification information comprises that the sub-district on the indication eNB2 is the indication information of main plot etc.; After eNB2 receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are carried out major control, for UE provides basic service and centralized service according to indication information wherein; Said UE knows that according to the indication information in the main plot modification information of receiving main plot after changing is the sub-district on the eNB2, returns acknowledge message; ENB1 changes to auxilliary sub-district, for UE provides enhancing business and Distributed Services.
Embodiment three:
In the present embodiment, the main plot selection mode is that competitive way, decision rule are information quality and loading condition, and is as shown in Figure 3; A sub-district is arranged respectively on eNB1 and the eNB2; The present invention realizes selecting in the CoMP system method of main plot, and as shown in Figure 6, this method comprises following step:
Step 601:UE initially inserts the sub-district on the eNB1 and successfully initiates professional;
Step 602: when the sub-district that UE need be on eNB2 initiates to give eNB1 with the reporting measuring result of the sub-district on the said eNB2 when professional;
Wherein, said measurement result comprises signal quality, loading condition etc.
After step 603:eNB1 received the measurement result of the sub-district on the eNB2 that UE reports, when measurement result satisfied access conditions, as the main plot, and notice UE inserted the sub-district on the eNB2 to said eNB1 with self sub-district;
In this step, as the main plot, that is: said eNB1 controls processes such as the Radio Link foundation of UE, reprovisions said eNB1, for UE provides basic service and centralized service with self sub-district.
Step 604: when UE with eNB1 and eNB2 on sub-district when carrying out service communication; ENB1 obtains the signal quality of the sub-district on eNB1 and the eNB2 through the measurement and report of UE; And obtaining the loading condition of the sub-district on the eNB2 through X2 interface, the minizone on self and eNB2 selects the sub-district of signal quality and the weighted value maximum of loading condition as the main plot;
Concrete; ENB1 obtains the signal quality of the sub-district on eNB1 and the eNB2 through the measurement and report of UE, obtains the loading condition of the sub-district on the eNB2 respectively by S (1), S (2) expression, and through X2 interface; Represent by L (2); The loading condition of the sub-district on himself is selected factor calculation, that is: the selection factor C (1) of the sub-district on the eNB1=S (1)-L (1) by L (1) expression; The selection factor C (2) of the sub-district that eNB2 is last=S (2)-L (2); The value that compares C (1) and C (2), if C this moment (1) value height, the sub-district on the eNB1 still is the main plot so; If C (2) value is high, then the main plot changes to the sub-district on the eNB2, that is: eNB1 sends the main plot modification information to UE and eNB2, and said main plot modification information comprises that the sub-district on the indication eNB2 is the indication information of main plot etc.;
After eNB2 receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service according to indication information wherein; Said UE knows that according to the indication information in the main plot modification information of receiving main plot after changing is the sub-district on the eNB2, returns acknowledge message; ENB1 changes to auxilliary sub-district, for UE provides enhancing business and Distributed Services.
Embodiment four:
In the present embodiment; The main plot selection mode is that competitive way, decision rule are information quality and loading condition; As shown in Figure 7, a sub-district is arranged respectively on eNB1, eNB2 and the eNB3, the present invention realizes selecting in the CoMP system method of main plot; As shown in Figure 8, this method comprises following step:
Step 801:UE all has professional the connection on eNB1 and eNB2, and eNB1 is the current main plot of UE;
Step 802: when the sub-district that UE need be on eNB3 initiates to give eNB1 with the reporting measuring result of the sub-district on the said eNB3 when professional;
Wherein, said measurement result comprises signal quality, loading condition etc.
After step 803:eNB1 received the measurement result of the sub-district on the eNB2 that UE reports, when measurement result satisfied access conditions, notice UE inserted the sub-district on the eNB3;
Step 804:eNB1 obtains the signal quality of the sub-district on eNB1, eNB2 and the eNB3 through the measurement and report of UE; And obtaining the loading condition of the last sub-district of eNB2, eNB3 through X2 interface, the sub-district of selecting signal quality and the weighted value maximum of loading condition in self and eNB2, the last minizone of eNB3 is as the main plot;
Concrete; ENB1 obtains the signal quality of the sub-district on eNB1, eNB2 and the eNB3 through the measurement and report of UE, respectively by S (1), S (2), S (3) expression, and obtains the loading condition of the last sub-district of eNB2, eNB3 through X2 interface; Respectively by L (2), L (3) expression; The loading condition of the sub-district on himself is selected factor calculation, that is: the selection factor C (1) of the sub-district on the eNB1=S (1)-L (1) by L (1) expression; The selection factor C (2) of the sub-district that eNB2 is last=S (2)-L (2); The selection factor C (3) of the sub-district that eNB3 is last=S (3)-L (3); The value that compares C (1), C (2), C (3), if C this moment (1) value is the highest, the sub-district on the eNB1 still is the main plot so; If C (2) value is the highest, then the main plot changes to the sub-district on the eNB2; If C (3) value is the highest, then the main plot changes to the sub-district on the eNB3.
In this step; Further comprise: if the sub-district on the eNB1 still is the main plot; When the service needed on the eNB1 discharges; ENB1 discharge with being connected of UE before obtain the value of S (2), S (3), L (2), L (3) again, and calculate the value of C (2), C (3), the selection factor C (1) of this sub-district is changed to minimum value.The value that compares C (1), C (2), C (3), if C (2) value is the highest, then the main plot changes to the sub-district on the eNB2; That is: eNB1 sends the main plot modification information to UE and eNB2, eNB3; Said main plot modification information comprises that the sub-district on the indication eNB2 is the indication information of main plot etc., after eNB2 receives the main plot modification information, according to indication information wherein; Processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service; Said UE and eNB3 know that according to the indication information in the main plot modification information of receiving main plot after changing is the sub-district on the eNB2, return acknowledge message; ENB1 discharges and leaves the cell list of UE association; If C (3) value is the highest; Then the main plot changes to the sub-district on the eNB3, that is: eNB1 sends the main plot modification information to UE and eNB2, eNB3, and said main plot modification information comprises that the sub-district on the indication eNB3 is the indication information of main plot etc.; After eNB3 receives the main plot modification information; According to indication information wherein, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service; Said UE and eNB2 know that according to the indication information in the main plot modification information of receiving main plot after changing is the sub-district on the eNB3, return acknowledge message; ENB1 discharges and leaves the cell list of UE association.
Embodiment five:
In the present embodiment, the main plot selection mode is that competitive way, decision rule are the service interaction time, and is as shown in Figure 7; A sub-district is arranged respectively on eNB1, eNB2 and the eNB3; The present invention realizes selecting in the CoMP system method of main plot, and as shown in Figure 9, this method comprises following step:
Step 901:UE all has professional the connection on eNB1, eNB2 and eNB3, and the sub-district on the eNB1 is the current main plot of UE;
Step 902: when the service needed on the eNB1 discharges, eNB1 discharge with being connected of UE before, add up the time that eNB2 and eNB3 and UE carry out service interaction respectively, the selection service interaction time is the main plot than the sub-district of growing;
In this step; Said eNB1 adds up the time that eNB2 and eNB3 and UE carry out service interaction respectively; Generally be, UE reports and the access of eNB2 and eNB3 order to eNB1, and the eNB that formerly inserts is longer than the eNB of the access in the back and the time that UE carries out service interaction with the time that UE carries out service interaction; As, the eNB that UE formerly inserts is eNB2, and then eNB1 sends the main plot modification information to UE and eNB2, eNB3, and said main plot modification information comprises that the sub-district on the indication eNB2 is the indication information of main plot etc.; After eNB2 receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service according to indication information wherein; Said UE and eNB3 know that according to the indication information in the main plot modification information of receiving main plot after changing is the sub-district on the eNB2, return acknowledge message; ENB1 discharges and leaves the cell list of UE association.
Embodiment six:
The main plot selection mode is the appointment mode of main plot for specifying the new sub-district of inserting; As shown in Figure 7, a sub-district is arranged, wherein on eNB1, eNB2 and the eNB3 respectively; When UE newly inserts the sub-district on the eNB3; The present invention realizes selecting in the CoMP system method of main plot, and shown in figure 10, this method comprises following step:
Step S101:UE all has professional the connection on eNB1 and eNB2, and eNB1 is the current main plot of UE;
Step S102: when the sub-district that UE need be on eNB3 initiates to give eNB1 with the reporting measuring result of the sub-district on the said eNB3 when professional;
Step S103:eNB1 is after receiving the measurement and report of UE to new access sub-district, and specifying the sub-district on the new eNB3 that inserts is the main plot;
Concrete, eNB1 is after receiving the measurement and report of UE to the sub-district on the eNB3 of new access, when measurement result satisfied access conditions, notice UE inserted the sub-district on the eNB3; ENB1 sends the main plot modification information to UE and eNB2, eNB3, and said main plot modification information comprises that the sub-district on the indication eNB3 is the indication information of main plot etc.; After said eNB3 receives the main plot modification information,, processes such as the Radio Link foundation of UE, reprovision are controlled, for UE provides basic service and centralized service according to indication information wherein; After said UE and eNB2 receive the main plot modification information,, know that main plot after changing is eNB3, return acknowledge message according to indication information wherein; ENB1 changes to auxilliary sub-district, for UE provides enhancing business and Distributed Services.
Through method of the present invention; Solved the major issue of the main plot of in a plurality of sub-districts, making a strategic decision in the CoMP system, can more reasonably select the main plot through competitive way, and can fully use the resource of system; Improve the satisfaction of user's impression, also guaranteed benefits of operators simultaneously.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. select the method for main plot in a cooperative multipoint transmission (CoMP) system, it is characterized in that this method comprises:
Need be when other sub-districts initiations to be professional when subscriber equipment (UE) to the place, sub-district of initial access evolution base station (eNB) notice, said eNB confirms as the main plot with the sub-district of said initial access;
Place, current main plot eNB all with sub-district that UE has business to be connected in confirm the main plot according to the main plot selection mode.
2. method according to claim 1 is characterized in that, said main plot selection mode comprises: competitive way and appointment mode;
Said competitive way is: all have the satisfaction degree of the professional sub-district that is connected to decision rule with UE by place, current main plot eNB real-time statistics, and the sub-district that decision rule is satisfied in selection most is the main plot;
Said appointment mode is: it is the main plot that place, current main plot eNB assigns the new sub-district of inserting, or place, current main plot eNB has with UE at all, and sub-district of assigned at random is the main plot in the professional sub-district that is connected.
3. method according to claim 2; It is characterized in that; Said main plot selection mode is competitive way, when decision rule is signal quality; Place, current main plot eNB obtains the signal quality that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, and the sub-district of selecting signal quality the best wherein is as the main plot.
4. method according to claim 2; It is characterized in that; Said main plot selection mode is competitive way, when decision rule is cell load; Current main plot place eNB obtains the loading condition that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface, selects to comprise to be the main plot in the minimum sub-district of interior load value certainly.
5. method according to claim 2; It is characterized in that; Said main plot selection mode is competitive way, when decision rule is signal quality and cell load; Current main plot place eNB obtains the signal quality S (i) that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, and obtains the loading condition L (i) that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface;
According to S (i) and L (i) factor calculation is selected in each sub-district, said selection factor C (i) is the poor of S (i) and L (i); It is the main plot that said current main plot place eNB selects the maximum sub-district of C (i) value.
6. method according to claim 2; It is characterized in that; Said main plot selection mode is that competitive way, decision rule are that service interaction is during the time; Place, current main plot eNB discharge with being connected of UE before, statistics and UE have the professional sub-district that is connected to belong to the time that eNB and UE carry out service interaction respectively, selection the longest sub-district of service interaction time is the main plot.
7. method according to claim 2 is characterized in that, said main plot selection mode is the appointment mode of main plot for specifying the new sub-district of inserting, and then when UE newly inserted a sub-district, it was the main plot that current main plot place eNB specifies the sub-district of new access.
8. a CoMP system is characterized in that, this system comprises: UE, eNB; Wherein,
UE is used for need initiating in other sub-districts to place, the sub-district of initial access eNB notice professional, and the while carries out business with two and two above sub-districts and is connected afterwards;
ENB when being used to place, the sub-district eNB of the initial access of UE, receives when the UE notice need be initiated business in other sub-districts, and the main plot is confirmed as in the sub-district of said initial access; During for place, current main plot eNB, all with sub-district that UE has business to be connected in confirm the main plot according to the main plot selection mode.
9. system according to claim 8; It is characterized in that; Said main plot selection mode is that competitive way, decision rule are signal quality; When then said eNB was place, current main plot eNB, said eNB obtained the signal quality that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, and the sub-district of selecting signal quality the best wherein is as the main plot;
Accordingly, said UE also is used to measure the signal quality that the professional sub-district that connects is arranged, and reports to current main plot place eNB.
10. system according to claim 8; It is characterized in that; Said main plot selection mode is that competitive way, decision rule are cell load; When then said eNB was current main plot place eNB, said eNB obtained the loading condition that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface, and selecting the sub-district that wherein load value is minimum is the main plot.
11. system according to claim 8; It is characterized in that; Said main plot selection mode is that competitive way, decision rule are signal quality and cell load; When then said eNB was current main plot place eNB, said eNB obtained the signal quality S (i) that the professional sub-district that is connected is arranged with UE through the measurement and report of UE, and obtains the loading condition L (i) that the eNB of the professional sub-district that is connected is arranged with UE through S1 or X2 interface; According to S (i) and L (i) factor calculation is selected in each sub-district, said selection factor C (i) is the poor of S (i) and L (i), and it is the main plot that said current main plot place eNB selects the maximum sub-district of C (i) value.
12. system according to claim 8; It is characterized in that; Said main plot selection mode is that competitive way, decision rule are the service interaction time, when then said eNB is place, current main plot eNB, said eNB discharge with being connected of UE before; Add up the time that has professional sub-district place eNB that is connected and UE to carry out service interaction with UE respectively, selecting the longest sub-district of service interaction time is the main plot.
13. system according to claim 8; It is characterized in that said main plot selection mode is the appointment mode of main plot for specifying the new sub-district of inserting, then when UE newly inserts a sub-district; When said eNB was current main plot place eNB, it was the main plot that said eNB specifies the new sub-district of inserting.
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| CN2010102504315A CN102378308A (en) | 2010-08-06 | 2010-08-06 | Coordinated multi-point transmission (CoMP) system and method for selecting primary cell |
| PCT/CN2011/073197 WO2012016455A1 (en) | 2010-08-06 | 2011-04-22 | Coordinated multi-point transmission system and primary cell selection method |
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