CN103209472A - Method and system for cooperative scheduling of inter-cell uplink interference coordination - Google Patents
Method and system for cooperative scheduling of inter-cell uplink interference coordination Download PDFInfo
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Abstract
The invention discloses a method and a system for cooperative scheduling of inter-cell uplink interference coordination. The method for the cooperative scheduling of the inter-cell uplink interference coordination includes that a base station performs an interference coordination operation based on cooperative scheduling information and a resource priority according to the obtained cooperative scheduling information and an uplink high interference indication (HII) and or an uplink interference overload indication (OI) received from adjacent cell base stations to adjust scheduling resources and or transmitting power of a user terminal when the interference and coordination time of the uplink high interference indication (HII) arrives, and the base station performs the interference coordination operation based on the cooperative scheduling information and user scheduling performances according to the obtained cooperative scheduling information and the uplink high interference indication (HII) and or the uplink interference overload indication (OI) received from the adjacent cell base stations to adjust the scheduling resources and or the transmitting power of the user terminal when the interference and coordination time of the uplink high interference overload indication (OI) arrives. The method and the system for the cooperative scheduling of the inter-cell uplink interference coordination can perform interference coordination on the basis of the cooperative scheduling, reduce inter-cell interference, and improve system performance.
Description
Technical field
The present invention relates to the cellular mobile communication technology field, relate in particular to a kind of method and system that the cooperative scheduling inter-cell uplink interference is coordinated of carrying out.
Background technology
In the cell mobile communication systems, use user terminal (User Equipment is called for short UE) the meeting phase mutual interference of same frequency resources in each residential quarter, produce presence of intercell interference, have a strong impact on power system capacity and covering.
The Inter-Cell Interference Coordination technology is avoided distributing identical resource to the edge customer of neighbor cell, and user's terminal transmitting power is controlled by the scheduling resource of adjacent a plurality of community user terminals is coordinated, and can effectively reduce presence of intercell interference.
3GPP E-UTRAN technical specification has defined adjacent base station (evolved Node B, abbreviation eNB) mutual up high interference indication (UL High Interference Indicator between, be called for short HII) and the mode of uplink interference overload indication (UL Interference Overload Indicator, abbreviation OI) realize the Inter-Cell Interference Coordination technology.In this technical specification, at first cell available resources is divided into N Resource Block (Resource Block is called for short RB), index is RB 0, and RB 1 ..., RB N-1; Generate HII indication and/or OI indication at the RB index then, wherein, the HII indication can value " 1 " or " 0 ", and, " 1 " expression high interference susceptibility, the low susceptibility that disturbs of " 0 " expression; OI indication can value corresponding to " strong jamming (high interference) ", " common interference (medium interference) " or " weak jamming (low interference) ", the interference interference interference moderate or that be subjected to big, that be subjected to that is subjected to of expression is less respectively; The base station sends to the HII indication that generates adjacent base station and/or the OI indication that generates is sent to adjacent base station; Interference coordination is carried out according to the HII indication of receiving and/or OI indication in last base station.Fig. 1 is HII indication form and mutual schematic diagram, and Fig. 2 is OI indication form and mutual schematic diagram.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and system that the cooperative scheduling inter-cell uplink interference is coordinated of carrying out, and carries out interference coordination on the cooperative scheduling basis, reduces presence of intercell interference.
In order to solve the problems of the technologies described above, the invention provides a kind of method that the cooperative scheduling inter-cell uplink interference is coordinated of carrying out, wherein,
When up high interference indication (HII) interference coordination arrives constantly, (OI) indicated according to the cooperative scheduling information of having obtained with from up high interference indication (HII) and/or uplink interference overload that neighbor cell base station is received in the base station, carry out the interference coordination operation based on cooperative scheduling information and resource prioritization, adjust scheduling resource and/or the transmitting power of user terminal;
When uplink interference overload indication (OI) interference coordination arrives constantly, (OI) indicated according to the cooperative scheduling information of having obtained with from the uplink interference overload that neighbor cell base station is received in the base station, carry out the interference coordination operation based on cooperative scheduling information and user's scheduling performance, adjust scheduling resource and/or the transmitting power of user terminal.
Further, said method can also have following characteristics:
The HII interference coordination constantly and the OI interference coordination be positioned at the base station scheduling cycle constantly, the OI interference coordination in the same base station scheduling cycle constantly adjacent HII interference coordination constantly between or be positioned at the HII interference coordination after the moment.
Further, said method can also have following characteristics:
Identical in adjacent HII interference coordination the time interval moment between of same base station scheduling in the cycle, the HII interference coordination cycle is less than the base station scheduling cycle;
Identical in adjacent OI interference coordination the time interval moment between of same base station scheduling in the cycle or in the same HII interference coordination cycle, the OI interference coordination cycle is equal to or less than the HII interference coordination cycle.
Further, said method can also have following characteristics:
Described base station determines that described base station and neighbor cell base station produce the resource of up high interference, by more described base station in the priority on this resource and neighbor cell base station the priority on this resource, decision is still carried out transmitting power adjustment operation to the dispatched users on this resource to the operation of the dispatched users operation dispatching resource adjustment on this resource.
Further, said method can also have following characteristics:
It is that the HII indication that neighbor cell base station sends has been received in described base station that described base station judges whether to satisfy simultaneously following two conditions, described base station has sent the HII indication to this neighbor cell base station, perhaps judging whether also meets the following conditions simultaneously is the cooperation cell collection of base stations that described neighbor cell base station does not belong to described base station, if, for a resource, if described base station receives that HII indication that this neighbor cell base station sends also is " 1 " for the HII indication that " 1 " and described base station send to this neighbor cell base station at this resource correspondence position at this resource correspondence position, then described base station judges whether it is lower than the priority of neighbor cell base station on this resource in the priority on this resource, if be lower than, operate the dispatched users operation dispatching resource adjustment on this resource described base station, if be higher than, described base station arranges the interference coordination sign to the dispatched users on this resource, and whether the transmitting power of judging this dispatched users can improve, if can improve, described base station arranges the big step-length of transmitting power to this dispatched users and improves sign.
Further, said method can also have following characteristics:
Described base station judges that the OI that its neighbor cell base station of receiving sends indicates when a resource correspondence position is " strong jamming ", distinguish strong interferers or common interference source that it is this neighbor cell base station in its dispatched users on this resource of the scheduling on this resource, and by the scheduling performance of this dispatched users relatively and the scheduling performance threshold value that sets in advance, decision is still carried out transmitting power adjustment operation to the dispatched users on this resource to the operation of the dispatched users operation dispatching resource adjustment on this resource.
Further, said method can also have following characteristics:
Described base station judges that the OI that its neighbor cell base station of receiving sends indicates when a resource correspondence position is " strong jamming ", strong interferers or the common interference source that its dispatched users on this resource is this neighbor cell base station judged in described base station, if the dispatched users of described base station on this resource is the strong interferers of this neighbor cell base station, and described base station does not arrange the interference coordination sign to this dispatched users, then described base station judges whether the scheduling performance of this dispatched users is not less than the scheduling performance threshold value that sets in advance, if be not less than, then described base station arranges transmitting power big step-length reduction sign and interference coordination sign to this dispatched users, if be lower than, described base station is to this dispatched users operation dispatching resource adjustment operation, if scheduling resource is adjusted operation failure, described base station arranges long reduction of transmitting power small step to this dispatched users and indicates, and this dispatched users is arranged the interference coordination sign; If the dispatched users of described base station on this resource is the common interference source of this neighbor cell base station, and described base station does not arrange the interference coordination sign to this dispatched users, then described base station judges whether the scheduling performance of this dispatched users is not less than the scheduling performance threshold value that sets in advance, if be not less than, then described base station arranges long sign and the interference coordination sign of reducing of transmitting power small step to this dispatched users.
Further, said method can also have following characteristics:
Described base station judges that the OI that its neighbor cell base station of receiving sends indicates when certain resource correspondence position is " weak jamming ", described base station judges whether it is provided with the interference coordination sign to the dispatched users on this resource, if the interference coordination sign is not set, then described base station judges whether the transmitting power of this dispatched users can improve, if can improve, described base station judges whether this dispatched users is Cell Center User, if Cell Center User, described base station arranges the big step-length of transmitting power to this dispatched users and improves sign; If not Cell Center User, described base station arranges the long sign that improves of transmitting power small step to this dispatched users.
Further, said method can also have following characteristics:
Described cooperative scheduling information comprises the cooperation cell collection of base stations of base station at least, the cooperative scheduling set of cells of user terminal;
Described resource prioritization is included as the different priority of the same asset configuration of neighbor cell base station.
Further, said method can also have following characteristics:
Described user's scheduling performance comprises one or more in the following parameter: the Signal to Interference plus Noise Ratio of dispatched users, the signal to noise ratio of dispatched users, the signal interference ratio of dispatched users, the Modulation and Coding Scheme grade of dispatched users.
Further, said method can also have following characteristics:
Described method also comprises:
Described base station obtains the interior scheduling performance of Serving cell and is lower than the scheduling performance threshold value that sets in advance and the dispatched users that the interference coordination sign is not set, described base station judges whether the transmitting power of dispatched users can improve, if can improve, then described base station arranges the big step-length raising of transmitting power sign to dispatched users; Otherwise if can not improve, then operate the adjustment of dispatched users operation dispatching resource described base station.
Further, said method can also have following characteristics:
The described adjustment of dispatched users operation dispatching resource is operated comprises:
Described base station judges whether there is idling-resource in the Serving cell, if there is idling-resource, described base station obtains the resource that OI that neighbor cell base station in the idling-resource sends is designated as " weak jamming ", and obtain the resource that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter is calculated in described base station when these resource scheduling, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, described base station obtains wherein the resource to dispatched users best performance to be adjusted, distribute to dispatched users to be adjusted, discharge the original scheduling resource of dispatched users to be adjusted simultaneously, and for dispatched users to be adjusted the interference coordination sign is set;
If there is no idling-resource or do not have suitable idling-resource, described base station obtains the resource that neighbor cell base station sends in the scheduling resource of other users in the Serving cell OI is designated as " weak jamming ", and obtain resource and the corresponding dispatched users thereof that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, described base station obtains dispatched users and the corresponding scheduling resource thereof that dispatched users scheduling performance when dispatched users scheduling resource to be adjusted scheduling on these resources is greater than or equal to the scheduling performance threshold value that sets in advance, as alternative adjustment user and alternative adjustment resource, the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter is calculated in described base station when alternative adjustment resource is dispatched, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, described base station obtains wherein the resource of dispatched users best performance to be adjusted and corresponding alternative adjustment user thereof, the scheduling resource of two dispatched users of exchange, and be that two dispatched users arrange the interference coordination sign.
In order to solve the problems of the technologies described above, the invention provides a kind of system that the cooperative scheduling inter-cell uplink interference is coordinated that carries out, comprise the base station, wherein, described base station comprises uplink interference Coordination Treatment module;
Described uplink interference Coordination Treatment module, be used for when up high interference indication (HII) interference coordination arrives constantly, indicate (OI) according to the cooperative scheduling information of having obtained with from up high interference indication (HII) and/or uplink interference overload that neighbor cell base station is received, carry out the interference coordination operation based on cooperative scheduling information and resource prioritization, adjust scheduling resource and/or the transmitting power of user terminal;
Also be used for when uplink interference overload indication (OI) interference coordination arrives constantly, indicate (OI) according to the cooperative scheduling information of having obtained with from the uplink interference overload that neighbor cell base station is received, carry out the interference coordination operation based on cooperative scheduling information and user's scheduling performance, adjust scheduling resource and/or the transmitting power of user terminal.
This programme can carry out interference coordination on the cooperative scheduling basis, reduces presence of intercell interference, improves systematic function.
Description of drawings
Fig. 1 is HII indication form and mutual schematic diagram in the prior art.
Fig. 2 is OI indication form and mutual schematic diagram in the prior art.
Fig. 3 is cooperative scheduling inter-cell uplink interference coordination approach flow chart among the embodiment.
Fig. 4 is the HII indication interference coordination moment and OI indication interference coordination a kind of set-up mode schematic diagram constantly;
Fig. 5 is the HII indication interference coordination moment and OI indication interference coordination another kind of set-up mode schematic diagram constantly;
Fig. 6 is interference coordination schematic diagram in the specific embodiment one, two.
Embodiment
In order to reduce inter-cell uplink interference, can adopt cooperative scheduling Inter-Cell Interference Coordination technology, on the basis to the scheduling of scheduling of user terminals resource collaboration, further coordinate and control scheduling resource and the transmitting power of neighbor cell user terminal, reduce presence of intercell interference intensity, improve systematic function.
As shown in Figure 3, carrying out the method that the cooperative scheduling inter-cell uplink interference coordinates comprises:
When up high interference indication (HII) interference coordination arrives constantly, (OI) indicated according to the cooperative scheduling information of having obtained with from up high interference indication (HII) and/or uplink interference overload that neighbor cell base station is received in the base station, carry out the interference coordination operation based on cooperative scheduling information and resource prioritization, adjust scheduling resource and/or the transmitting power of user terminal;
When uplink interference overload indication (OI) interference coordination arrives constantly, (OI) indicated according to the cooperative scheduling information of having obtained with from the uplink interference overload that neighbor cell base station is received in the base station, carry out the interference coordination operation based on cooperative scheduling information and user's scheduling performance, adjust scheduling resource and/or the transmitting power of user terminal.
Interference coordination result (comprising user's scheduling resource and user emission power) can also be preserved after carrying out said method in the base station, carries out user's scheduling and transfer of data according to the interference coordination result.
Wherein, the HII interference coordination constantly and the OI interference coordination be positioned at the base station scheduling cycle constantly, the OI interference coordination in the same base station scheduling cycle constantly adjacent HII interference coordination constantly between or be positioned at the HII interference coordination after the moment.The HII interference coordination constantly and the OI interference coordination moment can be that to be spacedly distributed also can be non-being spacedly distributed.
Identical in adjacent HII interference coordination the time interval moment between of same base station scheduling in the cycle, the HII interference coordination cycle is less than the base station scheduling cycle; Identical in adjacent OI interference coordination the time interval moment between of same base station scheduling in the cycle or in the same HII interference coordination cycle, the OI interference coordination cycle is equal to or less than the HII interference coordination cycle.
As shown in Figure 4, suppose that the base station scheduling cycle is 40 TTI (Transport Time Interval, Transmission Time Interval), the HII indication interference coordination cycle is 10 TTI, the OI indication interference coordination cycle is 1 TTI, and the current transmission time of supposing the system is K TTI, and the base station scheduling cycle arrives, dispatch the user base station, determines user's scheduling resource; First transmission time (i.e. K+1 TTI) after the scheduling is constantly indicated interference coordination cycle due in as HII, then in the current dispatching cycle, K+11 TTI, a K+21 TTI, a K+31 TTI are HII indication interference coordination cycle due in equally, and the base station is carried out interference coordination operation based on cooperative scheduling information and resource prioritization at HII indication interference coordination cycle due in according to the cooperative scheduling information of having obtained and HII indication and/or OI indication; Other transmission times within current dispatching cycle are indicated interference coordination cycle due in as OI, namely K+2 TTI to a K+10 TTI, K+12 TTI to a K+20 TTI, K+22 TTI to a K+30 TTI, K+32 TTI to a K+39 TTI is OI indication interference coordination cycle due in, and the base station is indicated the interference coordination operation of carrying out based on user's scheduling performance and cooperative scheduling information at OI indication interference coordination cycle due in according to the cooperative scheduling information of having obtained and OI.During K+40 TTI, the base station scheduling cycle arrives again, and dispatch the user again the base station, determines user's scheduling resource.
As shown in Figure 5, suppose that the base station scheduling cycle is 40 TTI (Transport Time Interval, Transmission Time Interval), HII indication interference coordination is preceding M TTI in the current dispatching cycle constantly, OI indication interference coordination is all the other TTI in the current dispatching cycle constantly, and the current transmission time of supposing the system is K TTI, and the base station scheduling cycle arrives, dispatch the user base station, determines user's scheduling resource; M the transmission time (i.e. K+1 TTI to the K+M TTI) after the scheduling constantly in current dispatching cycle as HII indication interference coordination constantly, the base station at HII indication interference coordination constantly according to the cooperative scheduling information of having obtained with HII indicates and/or OI indicates execution to operate based on the interference coordination of cooperative scheduling information and resource prioritization; All the other transmission times within current dispatching cycle as OI indication interference coordination constantly, namely K+M+1 TTI to a K+39 TTI is the OI indication interference coordination moment, and the base station indicates interference coordination to operate based on the interference coordination of user's scheduling performance and cooperative scheduling information according to the cooperative scheduling information of having obtained and OI indication execution constantly at OI.During K+40 TTI, the base station scheduling cycle arrives again, and dispatch the user again the base station, determines user's scheduling resource.
Described cooperative scheduling information comprises the cooperation cell collection of base stations of base station at least, the cooperative scheduling set of cells of user terminal; Described resource prioritization is included as the different priority of the same asset configuration of neighbor cell base station.
Scene when being directed to the HII interference coordination and arriving constantly, described base station determines that described base station and neighbor cell base station produce the resource of up high interference, by more described base station in the priority on this resource and neighbor cell base station the priority on this resource, decision is still carried out transmitting power adjustment operation to the dispatched users on this resource to the operation of the dispatched users operation dispatching resource adjustment on this resource.
Specifically comprise: it is that the HII indication that neighbor cell base station sends has been received in described base station that described base station judges whether to satisfy simultaneously following two conditions, described base station has sent the HII indication to this neighbor cell base station, perhaps judging whether also meets the following conditions simultaneously is the cooperation cell collection of base stations that described neighbor cell base station does not belong to described base station, if, for a resource, if described base station receives that HII indication that this neighbor cell base station sends also is " 1 " for the HII indication that " 1 " and described base station send to this neighbor cell base station at this resource correspondence position at this resource correspondence position, then described base station judges whether it is lower than the priority of neighbor cell base station on this resource in the priority on this resource, if be lower than, operate the dispatched users operation dispatching resource adjustment on this resource described base station, if be higher than, described base station arranges the interference coordination sign to the dispatched users on this resource, and whether the transmitting power of judging this dispatched users can improve, if can improve, described base station arranges the big step-length of transmitting power to this dispatched users and improves sign.
Scene when arriving constantly at the OI interference coordination, described base station judges that the OI that its neighbor cell base station of receiving sends indicates when a resource correspondence position is " strong jamming ", distinguish strong interferers or common interference source that it is this neighbor cell base station in its dispatched users on this resource of the scheduling on this resource, and by the scheduling performance of this dispatched users relatively and the scheduling performance threshold value that sets in advance, decision is still carried out transmitting power adjustment operation to the dispatched users on this resource to the operation of the dispatched users operation dispatching resource adjustment on this resource.
Specifically comprise: described base station judges that the OI that its neighbor cell base station of receiving sends indicates when a resource correspondence position is " strong jamming ", strong interferers or the common interference source that its dispatched users on this resource is this neighbor cell base station judged in described base station, if the dispatched users of described base station on this resource is the strong interferers of this neighbor cell base station, and described base station does not arrange the interference coordination sign to this dispatched users, then described base station judges whether the scheduling performance of this dispatched users is not less than the scheduling performance threshold value that sets in advance, if be not less than, then described base station arranges transmitting power big step-length reduction sign and interference coordination sign to this dispatched users, if be lower than, described base station is to this dispatched users operation dispatching resource adjustment operation, if scheduling resource is adjusted operation failure, described base station arranges long reduction of transmitting power small step to this dispatched users and indicates, and this dispatched users is arranged the interference coordination sign; If the dispatched users of described base station on this resource is the common interference source of this neighbor cell base station, and described base station does not arrange the interference coordination sign to this dispatched users, then described base station judges whether the scheduling performance of this dispatched users is not less than the scheduling performance threshold value that sets in advance, if be not less than, then described base station arranges long sign and the interference coordination sign of reducing of transmitting power small step to this dispatched users.
Described base station judges that the OI that its neighbor cell base station of receiving sends indicates when certain resource correspondence position is " weak jamming ", described base station judges whether it is provided with the interference coordination sign to the dispatched users on this resource, if the interference coordination sign is not set, then described base station judges whether the transmitting power of this dispatched users can improve, if can improve, described base station judges whether this dispatched users is Cell Center User, if Cell Center User, described base station arranges the big step-length of transmitting power to this dispatched users and improves sign; If not Cell Center User, described base station arranges the long sign that improves of transmitting power small step to this dispatched users.
Said method also comprises:
Described base station obtains the interior scheduling performance of Serving cell and is lower than the scheduling performance threshold value that sets in advance and the dispatched users that the interference coordination sign is not set, described base station judges whether the transmitting power of dispatched users can improve, if can improve, then described base station arranges the big step-length raising of transmitting power sign to dispatched users; Otherwise if can not improve, then operate the adjustment of dispatched users operation dispatching resource described base station.
In the said method, dispatched users operation dispatching resource adjustment operation is comprised:
Described base station judges whether there is idling-resource in the Serving cell, if there is idling-resource, described base station obtains the resource that OI that neighbor cell base station in the idling-resource sends is designated as " weak jamming ", and obtain the resource that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter is calculated in described base station when these resource scheduling, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, described base station obtains wherein the resource to dispatched users best performance to be adjusted, distribute to dispatched users to be adjusted, discharge the original scheduling resource of dispatched users to be adjusted simultaneously, and for dispatched users to be adjusted the interference coordination sign is set;
If there is no idling-resource or do not have suitable idling-resource, described base station obtains the resource that neighbor cell base station sends in the scheduling resource of other users in the Serving cell OI is designated as " weak jamming ", and obtain resource and the corresponding dispatched users thereof that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, described base station obtains dispatched users and the corresponding scheduling resource thereof that dispatched users scheduling performance when dispatched users scheduling resource to be adjusted scheduling on these resources is greater than or equal to the scheduling performance threshold value that sets in advance, as alternative adjustment user and alternative adjustment resource, the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter is calculated in described base station when alternative adjustment resource is dispatched, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, described base station obtains wherein the resource of dispatched users best performance to be adjusted and corresponding alternative adjustment user thereof, the scheduling resource of two dispatched users of exchange, and be that two dispatched users arrange the interference coordination sign.
In this method, the base station is base station configuration HII indication interference coordination cycle and/or OI indication interference coordination cycle and/or resource prioritization according to configuration rule, perhaps, be the base station configuration HII indication interference coordination moment and/or the OI indication interference coordination moment and/or resource prioritization according to configuration rule.Resource prioritization, scheduling performance threshold value, loss of spectral efficiency threshold value adopt default configuration or are disposed by systematic unity.Strong interferers and common interference source are judged according to Serving cell and/or the neighbor cell Reference Signal Received Power (Reference Signal Received Power is called for short RSRP) of terminal survey report in the base station.
Described cooperative scheduling information comprises the cooperation cell collection of base stations of base station at least, the cooperative scheduling set of cells of user terminal; Described resource prioritization is included as the different priority of the same asset configuration of neighbor cell base station.
Described user's scheduling performance comprises one or more in the following parameter: the Signal to Interference plus Noise Ratio SINR of dispatched users (Signal to Interference and Noise Ratio), the signal to noise ratio snr of dispatched users (Signal to Noise Ratio), the signal interference ratio SIR of dispatched users (Signal to Interference Ratio), the Modulation and Coding Scheme MCS of dispatched users (Modulation and Coding Scheme) grade.
User emission power is adjusted according to power adjustment sign in described base station, and described power adjustment sign comprises the big step-length reduction of transmitting power sign, long sign, the big step-length raising of transmitting power sign, the long sign that improves of transmitting power small step of reducing of transmitting power small step.
Describe said method in detail below by specific embodiment.
Specific embodiment one
As shown in Figure 6, base station eNB 1-eNB7 is seven adjacent base stations, and three residential quarters are arranged under each eNB, supposes that all there are 6 scheduling resource RB pieces each residential quarter: RB0, RB1, RB2, RB3, RB4, RB5; Be three cell configuration resource prioritizations, corresponding with RB, be example with three residential quarters under the eNB1: Cell 1:[3,3,2,2,1,1], Cell 8:[1,1,3,3,2,2], Cell 15:[2,2,1,1,3,3]; And suppose that three residential quarters under the base station are the cooperation cell set of this base station, cooperative scheduling can be carried out to the user in the cooperation cell set according to user's cooperative scheduling set of cells in the base station, and for example the Cell among the eNB1 1, Cell 8 and Cell 15 are the cooperation cell set of eNB1.
Be example with Cell 1, the neighbor cell of Cell 1 comprises Cell 8, Cell 15, Cell 10, Cell 16, Cell 9 and Cell 21, suppose that current transmission time is HII indication interference coordination cycle due in or the HII indication interference coordination moment, Cell 1 is according to the cooperative scheduling information of having obtained and HII indicates and/or OI indication execution is operated based on the interference coordination of cooperative scheduling information and resource prioritization, comprising:
Suppose that Cell 1 receives the HII indication that Cell 10 sends, and, Cell 1 has sent the HII indication for Cell 10, because Cell 10 does not belong to the cooperation cell set at Cell 1 place, suppose further that then resource RB2 correspondence position is " 1 " in the HII indication that Cell 1 receives that Cell 10 sends, and the HII indication that Cell 1 sends to Cell 10 also is " 1 " at resource RB2 correspondence position, Cell 1 judges that its priority on resource RB2 is lower than Cell 10 then, and then Cell 1 is to its dispatched users operation dispatching resource adjustment operation on resource RB2.
Suppose that resource RB0 correspondence position is " 1 " in the HII indication that Cell 1 receives that Cell 10 sends, and the HII indication that Cell 1 sends to Cell 10 also is " 1 " at resource RB0 correspondence position, Cell 1 judges that its priority on resource RB0 is higher than Cell 10 then, then the dispatched users on 1 couple of resource RB0 of Cell arranges the interference coordination sign, and whether the transmitting power of judging this dispatched users can improve, if can improve, then 1 pair of this dispatched users of Cell arranges the big step-length raising of transmitting power sign.
Optionally, after Cell 1 finished processing to HII indication, Cell 1 carried out following processing:
It is dispatched users on dispatched users, the dispatched users on the resource RB2 and the resource RB4 on the resource RB0 that Cell 1 obtains dispatched users that scheduling performance in the residential quarter is lower than the scheduling performance threshold value that sets in advance, the dispatched users that the interference coordination sign wherein is not set is the dispatched users on the resource RB4, then, Cell 1 judges whether the transmitting power of this dispatched users can improve, if can improve, then 1 pair of this dispatched users of Cell arranges the big step-length raising of transmitting power sign; Otherwise, if can not improve, then 1 pair of this dispatched users operation dispatching resource adjustment operation of Cell.
Wherein, the operation of the dispatched users operation dispatching resource adjustment on 1 couple of resource RB0 of Cell (or RB4) comprises:
Cell 1 judges whether there is idling-resource in the residential quarter, if there is idling-resource, then Cell 1 obtains the resource that OI that neighbor cell base station in the idling-resource sends is designated as " weak jamming ", and obtain the resource that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, then, Cell 1 calculates the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter when these resource scheduling, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, then, Cell 1 obtains wherein the resource to dispatched users best performance to be adjusted, distribute to dispatched users to be adjusted, discharge the original scheduling resource of dispatched users to be adjusted simultaneously, and for dispatched users to be adjusted the interference coordination sign is set; If there is no idling-resource or do not have suitable idling-resource, then Cell 1 obtains the resource that neighbor cell base station sends in the scheduling resource of other users in the Serving cell OI is designated as " weak jamming ", and obtain resource and the corresponding dispatched users thereof that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, then, Cell 1 obtains dispatched users and the corresponding scheduling resource thereof that dispatched users scheduling performance when dispatched users scheduling resource to be adjusted scheduling on these resources is greater than or equal to the scheduling performance threshold value that sets in advance, as alternative adjustment user and alternative adjustment resource, then, Cell 1 calculates the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter when alternative adjustment resource is dispatched, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, then, Cell 1 obtains wherein the resource of dispatched users best performance to be adjusted and corresponding alternative adjustment user thereof, the scheduling resource of two dispatched users of exchange, and be that two dispatched users arrange the interference coordination sign.
In this specific embodiment, be example with Cell 1, the neighbor cell of Cell 1 comprises Cell 8, Cell 15, Cell 10, Cell 16, Cell 9 and Cell 21, wherein, the neighbor cell that does not belong to the cooperation cell set at Cell 1 place is Cell 10, Cell 16, Cell 9 and Cell 21, when Cell 1 generates the HII indication at neighbor cell, can only judge whether need be at Cell 10, Cell 16, Cell 9 and Cell 21 generate the HII indication, that is to say that Cell 1 only generates the HII indication at the neighbor cell of the cooperation cell set that does not belong to Cell 1 place.So, when HII indicates the arrival of interference coordination cycle or HII indication interference coordination to arrive constantly, Cell 1 is according to the cooperative scheduling information of having obtained and HII indicates and/or OI indication execution is operated based on the interference coordination of cooperative scheduling information and resource prioritization, and, if Cell 1 has received the HII indication that certain neighbor cell sends, only need then to judge whether Cell 1 has sent the HII indication for this neighbor cell, just need no longer to judge whether this neighbor cell does not belong to the cooperation cell set at Cell 1 place.This interference coordination process can reduce the signaling consumption of mutual HII indication between neighbor cell base station.
In this specific embodiment, at HII interference coordination cycle due in or in the HII indication interference coordination moment, the base station is according to the cooperative scheduling information of having obtained and HII indicates and/or OI indication execution is operated based on the interference coordination of cooperative scheduling information and resource prioritization, adjust user's scheduling resource or transmitting power, reduce presence of intercell interference, improve systematic function.
Specific embodiment two
As shown in Figure 6, base station eNB 1-eNB7 is seven adjacent base stations, and three residential quarters are arranged under each eNB, supposes that all there are 6 scheduling resource RB pieces each residential quarter: RB0, RB1, RB2, RB3, RB4, RB5; Suppose that three residential quarters under the base station are the cooperation cell set of this base station, cooperative scheduling can be carried out to the user in the cooperation cell set according to user's cooperative scheduling set of cells in the base station, and for example the Cell among the eNB1 1, Cell 8 and Cell 15 are the cooperation cell set of eNB1.
Be example with Cell 1, the neighbor cell of Cell 1 comprises Cell 8, Cell 15, Cell 10, Cell 16, Cell 9 and Cell 21, suppose that current transmission time is OI indication interference coordination cycle due in or the OI indication interference coordination moment, Cell 1 operates based on the interference coordination of user's scheduling performance and cooperative scheduling information according to the cooperative scheduling information of having obtained and OI indication execution, comprising:
Suppose that the OI indication that Cell 1 receives that Cell 9 sends is " strong jamming " at resource RB1 correspondence position, then Cell 1 judges whether the dispatched users on the resource RB1 is strong interferers or the common interference source of Cell 9.If this dispatched users is the strong interferers of Cell 9, and Cell 1 does not arrange the interference coordination sign to this dispatched users, then Cell 1 judges whether the scheduling performance of this dispatched users is not less than the scheduling performance threshold value that sets in advance, if be not less than, then 1 pair of this dispatched users of Cell arranges transmitting power big step-length reduction sign and interference coordination sign; Otherwise, if be lower than, then 1 pair of this dispatched users operation dispatching resource adjustment operation of Cell, and, if scheduling resource is adjusted operation failure, then 1 pair of this dispatched users of Cell arranges the long reduction sign of transmitting power small step, and this dispatched users is arranged the interference coordination sign.If this dispatched users is the common interference source of Cell 9, and Cell 1 does not arrange the interference coordination sign to this dispatched users, then Cell 1 judges whether the scheduling performance of this dispatched users is not less than the scheduling performance threshold value that sets in advance, if be not less than, then 1 pair of this dispatched users of Cell arranges long sign and the interference coordination sign of reducing of transmitting power small step.
Further, after Cell 1 finished the processing of " strong jamming " indication that exists in the OI indication of each neighbor cell transmission that it is received, " weak jamming " indication that exists during the OI that Cell 1 sends its each neighbor cell of receiving indicates was handled:
Suppose that the OI indication that Cell 1 receives that Cell 9 sends is " weak jamming " at resource RB3 correspondence position, then Cell 1 judges whether it is provided with the interference coordination sign to the dispatched users on the resource RB3, if the interference coordination sign is not set, then Cell 1 judges whether the transmitting power of this dispatched users can improve, if can improve, then Cell 1 judges whether this dispatched users is Cell Center User, if Cell Center User, then 1 pair of this dispatched users of Cell arranges the big step-length raising of transmitting power sign; Otherwise if not Cell Center User, then 1 pair of this dispatched users of Cell arranges the long sign that improves of transmitting power small step.
Further, after Cell 1 finished the processing of " weak jamming " indication that exists in the OI indication of each neighbor cell transmission that it is received, Cell 1 carried out following processing:
Wherein, the operation of the dispatched users operation dispatching resource adjustment on 1 couple of resource RB1 of Cell (or RB5) comprises:
Cell 1 judges whether there is idling-resource in the residential quarter, if there is idling-resource, then Cell 1 obtains the resource that OI that neighbor cell base station in the idling-resource sends is designated as " weak jamming ", and obtain the resource that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, then, Cell 1 calculates the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter when these resource scheduling, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, then, Cell 1 obtains wherein the resource to dispatched users best performance to be adjusted, distribute to dispatched users to be adjusted, discharge the original scheduling resource of dispatched users to be adjusted simultaneously, and for dispatched users to be adjusted the interference coordination sign is set; If there is no idling-resource or do not have suitable idling-resource, then Cell 1 obtains the resource that neighbor cell base station sends in the scheduling resource of other users in the Serving cell OI is designated as " weak jamming ", and obtain resource and the corresponding dispatched users thereof that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, then, Cell 1 obtains dispatched users and the corresponding scheduling resource thereof that dispatched users scheduling performance when dispatched users scheduling resource to be adjusted scheduling on these resources is greater than or equal to the scheduling performance threshold value that sets in advance, as alternative adjustment user and alternative adjustment resource, then, Cell 1 calculates the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter when alternative adjustment resource is dispatched, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, then, Cell 1 obtains in the alternative adjustment resource the resource of dispatched users best performance to be adjusted and corresponding alternative adjustment user thereof, the scheduling resource of two dispatched users of exchange, and be that two dispatched users arrange the interference coordination sign.
In this specific embodiment, at OI interference coordination cycle due in or in the OI indication interference coordination moment, operate based on the interference coordination of user's scheduling performance and cooperative scheduling information according to the cooperative scheduling information of having obtained and OI indication execution the base station, adjust user's scheduling resource or transmitting power, reduce presence of intercell interference, improve systematic function.
Need to prove that under the situation of not conflicting, the embodiment among the application and the feature among the embodiment be combination in any mutually.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, described program can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (13)
1. one kind is carried out the method that the cooperative scheduling inter-cell uplink interference is coordinated, wherein,
When up high interference indication (HII) interference coordination arrives constantly, (OI) indicated according to the cooperative scheduling information of having obtained with from up high interference indication (HII) and/or uplink interference overload that neighbor cell base station is received in the base station, carry out the interference coordination operation based on cooperative scheduling information and resource prioritization, adjust scheduling resource and/or the transmitting power of user terminal;
When uplink interference overload indication (OI) interference coordination arrives constantly, (OI) indicated according to the cooperative scheduling information of having obtained with from the uplink interference overload that neighbor cell base station is received in the base station, carry out the interference coordination operation based on cooperative scheduling information and user's scheduling performance, adjust scheduling resource and/or the transmitting power of user terminal.
2. the method for claim 1 is characterized in that,
The HII interference coordination constantly and the OI interference coordination be positioned at the base station scheduling cycle constantly, the OI interference coordination in the same base station scheduling cycle constantly adjacent HII interference coordination constantly between or be positioned at the HII interference coordination after the moment.
3. the method for claim 1 is characterized in that,
Identical in adjacent HII interference coordination the time interval moment between of same base station scheduling in the cycle, the HII interference coordination cycle is less than the base station scheduling cycle;
Identical in adjacent OI interference coordination the time interval moment between of same base station scheduling in the cycle or in the same HII interference coordination cycle, the OI interference coordination cycle is equal to or less than the HII interference coordination cycle.
4. the method for claim 1 is characterized in that,
Described base station determines that described base station and neighbor cell base station produce the resource of up high interference, by more described base station in the priority on this resource and neighbor cell base station the priority on this resource, decision is still carried out transmitting power adjustment operation to the dispatched users on this resource to the operation of the dispatched users operation dispatching resource adjustment on this resource.
5. method as claimed in claim 4 is characterized in that,
It is that the HII indication that neighbor cell base station sends has been received in described base station that described base station judges whether to satisfy simultaneously following two conditions, described base station has sent the HII indication to this neighbor cell base station, perhaps judging whether also meets the following conditions simultaneously is the cooperation cell collection of base stations that described neighbor cell base station does not belong to described base station, if, for a resource, if described base station receives that HII indication that this neighbor cell base station sends also is " 1 " for the HII indication that " 1 " and described base station send to this neighbor cell base station at this resource correspondence position at this resource correspondence position, then described base station judges whether it is lower than the priority of neighbor cell base station on this resource in the priority on this resource, if be lower than, operate the dispatched users operation dispatching resource adjustment on this resource described base station, if be higher than, described base station arranges the interference coordination sign to the dispatched users on this resource, and whether the transmitting power of judging this dispatched users can improve, if can improve, described base station arranges the big step-length of transmitting power to this dispatched users and improves sign.
6. the method for claim 1 is characterized in that,
Described base station judges that the OI that its neighbor cell base station of receiving sends indicates when a resource correspondence position is " strong jamming ", distinguish strong interferers or common interference source that it is this neighbor cell base station in its dispatched users on this resource of the scheduling on this resource, and by the scheduling performance of this dispatched users relatively and the scheduling performance threshold value that sets in advance, decision is still carried out transmitting power adjustment operation to the dispatched users on this resource to the operation of the dispatched users operation dispatching resource adjustment on this resource.
7. method as claimed in claim 6 is characterized in that,
Described base station judges that the OI that its neighbor cell base station of receiving sends indicates when a resource correspondence position is " strong jamming ", strong interferers or the common interference source that its dispatched users on this resource is this neighbor cell base station judged in described base station, if the dispatched users of described base station on this resource is the strong interferers of this neighbor cell base station, and described base station does not arrange the interference coordination sign to this dispatched users, then described base station judges whether the scheduling performance of this dispatched users is not less than the scheduling performance threshold value that sets in advance, if be not less than, then described base station arranges transmitting power big step-length reduction sign and interference coordination sign to this dispatched users, if be lower than, described base station is to this dispatched users operation dispatching resource adjustment operation, if scheduling resource is adjusted operation failure, described base station arranges long reduction of transmitting power small step to this dispatched users and indicates, and this dispatched users is arranged the interference coordination sign; If the dispatched users of described base station on this resource is the common interference source of this neighbor cell base station, and described base station does not arrange the interference coordination sign to this dispatched users, then described base station judges whether the scheduling performance of this dispatched users is not less than the scheduling performance threshold value that sets in advance, if be not less than, then described base station arranges long sign and the interference coordination sign of reducing of transmitting power small step to this dispatched users.
8. the method for claim 1 is characterized in that,
Described base station judges that the OI that its neighbor cell base station of receiving sends indicates when certain resource correspondence position is " weak jamming ", described base station judges whether it is provided with the interference coordination sign to the dispatched users on this resource, if the interference coordination sign is not set, then described base station judges whether the transmitting power of this dispatched users can improve, if can improve, described base station judges whether this dispatched users is Cell Center User, if Cell Center User, described base station arranges the big step-length of transmitting power to this dispatched users and improves sign; If not Cell Center User, described base station arranges the long sign that improves of transmitting power small step to this dispatched users.
9. the method for claim 1 is characterized in that,
Described cooperative scheduling information comprises the cooperation cell collection of base stations of base station at least, the cooperative scheduling set of cells of user terminal;
Described resource prioritization is included as the different priority of the same asset configuration of neighbor cell base station.
10. as claim 1,6,7 described methods, it is characterized in that,
Described user's scheduling performance comprises one or more in the following parameter: the Signal to Interference plus Noise Ratio of dispatched users, the signal to noise ratio of dispatched users, the signal interference ratio of dispatched users, the Modulation and Coding Scheme grade of dispatched users.
11. as claim 4,5,6,7,8 described methods, it is characterized in that,
Described method also comprises:
Described base station obtains the interior scheduling performance of Serving cell and is lower than the scheduling performance threshold value that sets in advance and the dispatched users that the interference coordination sign is not set, described base station judges whether the transmitting power of dispatched users can improve, if can improve, then described base station arranges the big step-length raising of transmitting power sign to dispatched users; Otherwise if can not improve, then operate the adjustment of dispatched users operation dispatching resource described base station.
12. as claim 4,5,6,7 described methods, it is characterized in that,
The described adjustment of dispatched users operation dispatching resource is operated comprises:
Described base station judges whether there is idling-resource in the Serving cell, if there is idling-resource, described base station obtains the resource that OI that neighbor cell base station in the idling-resource sends is designated as " weak jamming ", and obtain the resource that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter is calculated in described base station when these resource scheduling, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, described base station obtains wherein the resource to dispatched users best performance to be adjusted, distribute to dispatched users to be adjusted, discharge the original scheduling resource of dispatched users to be adjusted simultaneously, and for dispatched users to be adjusted the interference coordination sign is set;
If there is no idling-resource or do not have suitable idling-resource, described base station obtains the resource that neighbor cell base station sends in the scheduling resource of other users in the Serving cell OI is designated as " weak jamming ", and obtain resource and the corresponding dispatched users thereof that dispatched users to be adjusted scheduling performance when the scheduling of these resources is greater than or equal to the scheduling performance threshold value that sets in advance, described base station obtains dispatched users and the corresponding scheduling resource thereof that dispatched users scheduling performance when dispatched users scheduling resource to be adjusted scheduling on these resources is greater than or equal to the scheduling performance threshold value that sets in advance, as alternative adjustment user and alternative adjustment resource, the loss of spectral efficiency that dispatched users to be adjusted causes its corresponding dispatched users in cooperative scheduling residential quarter is calculated in described base station when alternative adjustment resource is dispatched, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value that sets in advance, described base station obtains wherein the resource of dispatched users best performance to be adjusted and corresponding alternative adjustment user thereof, the scheduling resource of two dispatched users of exchange, and be that two dispatched users arrange the interference coordination sign.
13. one kind is carried out the system that the cooperative scheduling inter-cell uplink interference is coordinated, and comprises the base station, wherein,
Described base station comprises uplink interference Coordination Treatment module;
Described uplink interference Coordination Treatment module, be used for when up high interference indication (HII) interference coordination arrives constantly, indicate (OI) according to the cooperative scheduling information of having obtained with from up high interference indication (HII) and/or uplink interference overload that neighbor cell base station is received, carry out the interference coordination operation based on cooperative scheduling information and resource prioritization, adjust scheduling resource and/or the transmitting power of user terminal;
Also be used for when uplink interference overload indication (OI) interference coordination arrives constantly, indicate (OI) according to the cooperative scheduling information of having obtained with from the uplink interference overload that neighbor cell base station is received, carry out the interference coordination operation based on cooperative scheduling information and user's scheduling performance, adjust scheduling resource and/or the transmitting power of user terminal.
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