CN103209472B - A kind of method and system for carrying out cooperative scheduling inter-cell uplink interference coordination - Google Patents
A kind of method and system for carrying out cooperative scheduling inter-cell uplink interference coordination Download PDFInfo
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Abstract
The invention discloses a kind of method and system for carrying out cooperative scheduling inter-cell uplink interference coordination, the method includes：When up high interference instruction (HII) interference coordination moment reaches, base station is according to the cooperative scheduling information obtained and the up high interference instruction (HII) and/or uplink interference overload instruction (OI) that are received from neighbor cell base station, interference coordination operation is performed based on cooperative scheduling information and resource prioritization, adjusts the scheduling resource and/or transmission power of user terminal；When uplink interference overload instruction (OI) interference coordination moment reaches, base station is according to the cooperative scheduling information obtained and the uplink interference overload instruction (OI) received from neighbor cell base station, interference coordination operation is performed based on cooperative scheduling information and user's scheduling performance, adjusts the scheduling resource and/or transmission power of user terminal.This programme can carry out interference coordination on the basis of cooperative scheduling, reduce inter-cell interference, improve systematic function.
Description
Technical field
The present invention relates to cellular mobile communication technology field, more particularly to a kind of progress cooperative scheduling inter-cell uplink interference
The method and system of coordination.
Background technology
In cell mobile communication systems, the user terminal (User of same frequency resources is used in each cell
Equipment, abbreviation UE) it can interfere, inter-cell interference is produced, has a strong impact on power system capacity and covering.
Inter-Cell Interference Coordination technology by coordinating to the scheduling resource of adjacent multiple community user terminals, avoid to
The edge customer distribution identical resource of neighbor cell, and user's terminal transmitting power is controlled, it can effectively reduce
Inter-cell interference.
Interaction is up between 3GPP E-UTRAN technical specifications define adjacent base station (evolved Node B, abbreviation eNB)
High interference indicates (UL High Interference Indicator, abbreviation HII) and uplink interference overload instruction (UL
Interference Overload Indicator, abbreviation OI) mode realize Inter-Cell Interference Coordination technology.The technology
In specification, cell available resources are divided into N number of resource block (Resource Block, abbreviation RB) first, indexed as RB 0, RB
1 ..., RB N-1；Then for the generation HII instructions of RB indexes and/or OI instructions, wherein, HII indicate can with value " 1 " or
" 0 ", also, " 1 " represents high interference susceptibility, " 0 " represents low interference susceptibility；OI instructions can correspond to " strong jamming with value
(high interference) ", " common interference (medium interference) " or " weak jamming (low
Interference) ", the interference moderate or be subject to of interference that the interference that represents to be subject to respectively is larger, is subject to is smaller；Base station is raw
Into HII instructions be sent to adjacent base station and/or the OI of generation instruction be sent to adjacent base station；Last base station is according to receiving
HII is indicated and/or OI instructions carry out interference coordination.Fig. 1 be HII instruction form and interaction schematic diagram, Fig. 2 be OI instruction form and
Interaction schematic diagram.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method for carrying out cooperative scheduling inter-cell uplink interference coordination
And system, interference coordination is carried out on the basis of cooperative scheduling, reduces inter-cell interference.
In order to solve the above-mentioned technical problem, the invention provides a kind of progress cooperative scheduling inter-cell uplink interference coordination
Method, wherein,
When up high interference instruction (HII) interference coordination moment reaches, base station is according to the cooperative scheduling information obtained
With the up high interference instruction (HII) received from neighbor cell base station and/or uplink interference overload instruction (OI), adjusted based on cooperation
Spend information and resource prioritization performs interference coordination operation, adjust the scheduling resource and/or transmission power of user terminal；
When uplink interference overload instruction (OI) interference coordination moment reaches, base station is according to the cooperative scheduling information obtained
Uplink interference overload instruction (OI) with being received from neighbor cell base station, is performed based on cooperative scheduling information and user's scheduling performance
Interference coordination operates, and adjusts the scheduling resource and/or transmission power of user terminal.
Further, the above method can also have the characteristics that：
HII interference coordination moment and OI interference coordination moment were located in the base station scheduling cycle, in the same base station scheduling cycle
The OI interference coordination moment between the adjacent HII interference coordination moment or after the HII interference coordination moment.
Further, the above method can also have the characteristics that：
The time interval between the adjacent HII interference coordinations moment within the same base station scheduling cycle is identical, HII interference
The coordination cycle is less than the base station scheduling cycle；
Between the adjacent OI interference coordinations moment within the same base station scheduling cycle or in the same HII interference coordinations cycle
Time interval it is identical, the OI interference coordination cycles are equal to or less than the HII interference coordination cycles.
Further, the above method can also have the characteristics that：
The base station determines that the base station produces the resource of up high interference with neighbor cell base station, passes through the base
The priority stood in this resource and priority of the neighbor cell base station in this resource, are determined to the scheduling user in the resource
Scheduling resource adjustment operation is performed, or transmission power adjustment operation is performed to the scheduling user in the resource.
Further, the above method can also have the characteristics that：
The base station judges whether to meet that the i.e. described base station of following two conditions have received neighbor cell base station transmission simultaneously
HII instructions, the base station have sent HII instructions to this neighbor cell base station, or judges whether also while meet following bar
Part is the cooperation cell collection of base stations that the neighbor cell base station is not belonging to the base station, if it is, for a resource, if institute
It is " 1 " in the resource correspondence position to state base station to receive the HII that the neighbor cell base station is sent to indicate and the base station is sent to this
It is also " 1 " that the HII of neighbor cell base station, which is indicated in the resource correspondence position, then the base station judges its on the resource preferential
Whether level is less than the priority of neighbor cell base station on the resource, if be less than, the base station is used the scheduling in the resource
Family performs scheduling resource adjustment operation, if it is, the base station sets interference coordination mark to the scheduling user in the resource,
And judge whether the transmission power of scheduling user can improve, if it is possible to improve, the base station is set to scheduling user
The big step-length of transmission power improves mark.
Further, the above method can also have the characteristics that：
The base station judges the OI that its neighbor cell base station received is sent indicates in a resource correspondence position it is " capable and experienced
Disturb " when, it is the strong interferers of the neighbor cell base station or common interference source to distinguish its scheduling user on the resource, and is led to
The scheduling performance for comparing scheduling user and the scheduling performance threshold value pre-set are crossed, is determined to the scheduling user in the resource
Scheduling resource adjustment operation is performed, or transmission power adjustment operation is performed to the scheduling user in the resource.
Further, the above method can also have the characteristics that：
The base station judges the OI that its neighbor cell base station received is sent indicates in a resource correspondence position it is " capable and experienced
Disturb " when, the base station judges that its scheduling user on the resource is the strong interferers of the neighbor cell base station or common dry
Source is disturbed, if the scheduling user of the base station on the resource is the strong interferers of the neighbor cell base station, and the base station
Interference coordination mark is not set to scheduling user, then the base station judges whether the scheduling performance of scheduling user is not less than
The scheduling performance threshold value pre-set, if be not less than, the base station sets the big step-length of transmission power to scheduling user
Mark and interference coordination mark are reduced, if be less than, the base station performs scheduling resource adjustment operation to scheduling user, if
Scheduling resource adjusts operation failure, and the base station sets the small step-length of transmission power to reduce mark to scheduling user, and to the tune
Spend user and interference coordination mark is set；If the scheduling user of the base station on the resource is the common of the neighbor cell base station
Interference source, and the base station does not set interference coordination mark to scheduling user, then and the base station judges scheduling user
Scheduling performance whether not less than the scheduling performance threshold value that pre-sets, if be not less than, the base station is used the scheduling
Family sets the small step-length of transmission power to reduce mark and interference coordination mark.
Further, the above method can also have the characteristics that：
It is " weak dry that the base station, which judges that the OI that its neighbor cell base station received is sent is indicated in some resource correspondence position,
Disturb " when, the base station judges whether it is provided with interference coordination mark to the scheduling user in the resource, if being not provided with doing
Coordination mark is disturbed, then the base station judges whether the transmission power of scheduling user can improve, if it is possible to improves, the base
Stand and judge whether scheduling user is Cell Center User, if Cell Center User, the base station is set to scheduling user
Put the big step-length of transmission power and improve mark；If not Cell Center User, the base station sets transmitting work(to scheduling user
The small step-length of rate improves mark.
Further, the above method can also have the characteristics that：
The cooperative scheduling information comprises at least the cooperation cell collection of base stations of base station, the cooperative scheduling cell of user terminal
Set；
The resource prioritization includes the different priority configured for the same asset of neighbor cell base station.
Further, the above method can also have the characteristics that：
User's scheduling performance includes the one or more in following parameter：The Signal to Interference plus Noise Ratio of user is dispatched, scheduling is used
The signal to noise ratio at family, the signal interference ratio of user is dispatched, dispatch the Modulation and Coding Scheme grade of user.
Further, the above method can also have the characteristics that：
Methods described also includes：
The base station obtains scheduling performance in serving cell and is less than the scheduling performance threshold value pre-set and is not provided with
Whether the scheduling user of interference coordination mark, the transmission power that the base station judges to dispatch user can improve, if it is possible to carry
Height, then the base station is to the big step-length raising mark of scheduling user's setting transmission power；Otherwise, if can not improve, the base
Stand and scheduling resource adjustment operation is performed to scheduling user.
Further, the above method can also have the characteristics that：
Described couple of scheduling user, which performs scheduling resource adjustment operation, to be included：
The base station judges to whether there is idling-resource in serving cell, if there is idling-resource, the base station acquisition
The OI that neighbor cell base station is sent in idling-resource is designated as the resource of " weak jamming ", and obtains scheduling user to be adjusted at these
Scheduling performance is greater than or equal to the resource of the scheduling performance threshold value pre-set when being dispatched in resource, and the base station, which calculates, waits to adjust
Whole scheduling user loss of spectral efficiency to caused by its cooperative scheduling cell accordingly dispatches user when being dispatched in these resources, and
The resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value pre-set is obtained, the base station, which obtains, wherein treats
The optimal resource of adjustment scheduling user performance, distributes to scheduling user to be adjusted, while it is original to discharge scheduling user to be adjusted
Scheduling resource, and interference coordination mark is set for scheduling user to be adjusted；
If there is no idling-resource or in the absence of applicable idling-resource, the base station obtains in serving cell other
The OI that neighbor cell base station is sent in the scheduling resource of user is designated as the resource of " weak jamming ", and obtains scheduling user to be adjusted
When being dispatched in these resources, scheduling performance is greater than or equal to the resource of scheduling performance threshold value that pre-sets and its corresponding
User is dispatched, the scheduling user that the base station is obtained in these resources dispatches when being dispatched on scheduling user's scheduling resource to be adjusted
Performance is greater than or equal to the scheduling user of the scheduling performance threshold value pre-set and its corresponding scheduling resource, alternately adjusts
Whole user and alternative adjustresources, the base station calculate scheduling user to be adjusted and it are cooperated when being dispatched on alternative adjustresources
Scheduling cell accordingly dispatches loss of spectral efficiency caused by user, and obtains loss of spectral efficiency and be not more than the frequency spectrum pre-set
The resource of loss in efficiency threshold value, the base station obtain resource wherein optimal to scheduling user performance to be adjusted and its corresponding
Alternative adjustment user, the scheduling resource of two scheduling users is exchanged, and interference coordination mark is set for two scheduling users.
In order to solve the above-mentioned technical problem, the invention provides a kind of progress cooperative scheduling inter-cell uplink interference coordination
System, including base station, wherein, the base station includes uplink interference coordination processing module；
The uplink interference coordination processing module, for up high interference instruction (HII) interference coordination moment reach when,
It is (HII) and/or up according to the cooperative scheduling information obtained and the up high interference instruction received from neighbor cell base station
Interference overload instruction (OI), interference coordination operation is performed based on cooperative scheduling information and resource prioritization, adjusts user terminal
Scheduling resource and/or transmission power；
It is additionally operable to when uplink interference is overloaded instruction (OI) interference coordination moment and reached, according to the cooperative scheduling obtained
Information and the uplink interference overload instruction (OI) received from neighbor cell base station, based on cooperative scheduling information and user's scheduling performance
Interference coordination operation is performed, adjusts the scheduling resource and/or transmission power of user terminal.
This programme can carry out interference coordination on the basis of cooperative scheduling, reduce inter-cell interference, improve systematic function.
Brief description of the drawings
Fig. 1 is that HII indicates form with interacting schematic diagram in the prior art.
Fig. 2 is that OI indicates form with interacting schematic diagram in the prior art.
Fig. 3 is cooperative scheduling inter-cell uplink interference coordination approach flow chart in embodiment.
Fig. 4 is a kind of set-up mode schematic diagram at HII instruction interference coordination moment and OI instruction interference coordination moment；
Fig. 5 is another set-up mode schematic diagram at HII instruction interference coordination moment and OI instruction interference coordination moment；
Fig. 6 is interference coordination schematic diagram in specific embodiment one, two.
Embodiment
In order to reduce inter-cell uplink interference, cooperative scheduling Inter-Cell Interference Coordination technology can be used, whole to user
On the basis of holding scheduling resource cooperative scheduling, further coordinate and control the scheduling resource and transmitting work(of neighbor cell user terminal
Rate, inter-cell interference intensity is reduced, improve systematic function.
As shown in figure 3, carrying out the method for cooperative scheduling inter-cell uplink interference coordination includes：
When up high interference instruction (HII) interference coordination moment reaches, base station is according to the cooperative scheduling information obtained
With the up high interference instruction (HII) received from neighbor cell base station and/or uplink interference overload instruction (OI), adjusted based on cooperation
Spend information and resource prioritization performs interference coordination operation, adjust the scheduling resource and/or transmission power of user terminal；
When uplink interference overload instruction (OI) interference coordination moment reaches, base station is according to the cooperative scheduling information obtained
Uplink interference overload instruction (OI) with being received from neighbor cell base station, is performed based on cooperative scheduling information and user's scheduling performance
Interference coordination operates, and adjusts the scheduling resource and/or transmission power of user terminal.
Base station perform the above method after, can also preserve interference coordination result (including user's scheduling resource and user transmitting
Power), user's scheduling and data transfer are carried out according to interference coordination result.
Wherein, HII interference coordinations moment and OI interference coordination moment were located in the base station scheduling cycle, same base station scheduling week
The OI interference coordination moment in phase is between the adjacent HII interference coordination moment or after the HII interference coordination moment.
HII interference coordination moment and OI interference coordination moment can be that to be spacedly distributed can also be non-be spacedly distributed.
The time interval between the adjacent HII interference coordinations moment within the same base station scheduling cycle is identical, HII interference
The coordination cycle is less than the base station scheduling cycle；It is adjacent within the same base station scheduling cycle or in the same HII interference coordinations cycle
Time interval between the OI interference coordination moment is identical, and the OI interference coordination cycles are equal to or less than the HII interference coordination cycles.
It is assumed that the base station scheduling cycle is 40 TTI (Transport Time Interval, transmission times
Interval), the HII instruction interference coordination cycles are 10 TTI, and the OI instruction interference coordination cycles are 1 TTI, it is assumed that system works as forward pass
The defeated moment is k-th TTI, and the arrival of base station scheduling cycle, base station are scheduled to user, determine the scheduling resource of user；
First transmission time (i.e. the K+1 TTI) after scheduling instance as HII instruction interference coordination cycle due ins, then when
In preceding dispatching cycle, the K+11 TTI, the K+21 TTI, the K+31 TTI are equally to reach in the HII instruction interference coordination cycles
Moment, base station HII instruction interference coordination cycle due according to obtained cooperative scheduling information and HII instruction with/
Or OI instructions are performed and operated based on the interference coordination of cooperative scheduling information and resource prioritization；Its within current dispatching cycle
His transmission time is individual as OI instruction interference coordination cycle due ins, i.e. the K+2 TTI to the K+10 TTI, K+12
TTI to the K+20 TTI, the K+22 TTI to the K+30 TTI, the K+32 TTI to the K+39 TTI are that OI instructions are dry
Disturb and coordinate cycle due in, base station indicates interference coordination cycle due according to the cooperative scheduling information obtained in OI
Perform with OI instructions and operated based on user's scheduling performance and the interference coordination of cooperative scheduling information.During K+40 TTI, base station is adjusted
Spend the cycle is reached again, and base station is scheduled to user again, determines the scheduling resource of user.
As shown in fig. 5, it is assumed that the base station scheduling cycle is 40 TTI (Transport Time Interval, transmission times
Interval), the HII instruction interference coordination moment is the preceding M TTI in current dispatching cycle, and the OI instruction interference coordination moment is current
Remaining TTI in dispatching cycle, it is assumed that the system current transmission moment is k-th TTI, and the base station scheduling cycle reaches, base station pair
User is scheduled, and determines the scheduling resource of user；M transmission time (i.e. K after scheduling instance in current dispatching cycle
+ 1 TTI to the K+M TTI) as the HII instruction interference coordination moment, base station is at the HII instruction interference coordination moment according to
The instruction of cooperative scheduling information and HII and/or OI instructions of acquisition perform the interference based on cooperative scheduling information and resource prioritization
Coordinated manipulation；Remaining transmission time within current dispatching cycle is individual as OI instruction interference coordination moment, i.e. K+M+1
TTI to the K+39 TTI is that OI indicates the interference coordination moment, and base station indicates the interference coordination moment according to the association obtained in OI
The information that works as dispatcher and OI instructions are performed and operated based on user's scheduling performance and the interference coordination of cooperative scheduling information.K+40
During TTI, the base station scheduling cycle is reached again, and base station is scheduled to user again, determines the scheduling resource of user.
The cooperative scheduling information comprises at least the cooperation cell collection of base stations of base station, the cooperative scheduling cell of user terminal
Set；The resource prioritization includes the different priority configured for the same asset of neighbor cell base station.
Scene of HII interference coordination moment when reaching is directed to, the base station determines the base station and neighbor cell base station
The resource of up high interference is produced, by priority of the base station in this resource and neighbor cell base station in this resource
On priority, determine to perform the scheduling user in the resource scheduling resource adjustment operation, or to the scheduling in the resource
User performs transmission power adjustment operation.
Specifically include：The base station judges whether to meet that the i.e. described base station of following two conditions have received neighbor cell simultaneously
The HII that base station is sent is indicated, the base station have sent HII instructions to this neighbor cell base station, or is judged whether also while full
It is enough the cooperation cell collection of base stations that the i.e. described neighbor cell base station of lower condition is not belonging to the base station, if it is, for a money
Source, if the HII that the base station receives neighbor cell base station transmission indicates in the resource correspondence position to be " 1 " and the base station
The HII for being sent to the neighbor cell base station indicates in the resource correspondence position to be also " 1 ", then the base station judges it in the resource
On priority whether be less than the priority of neighbor cell base station on the resource, if be less than, the base station is in the resource
Scheduling user perform scheduling resource adjustment operation, if it is, the base station in the resource scheduling user set interference
Coordinate mark, and judge whether the transmission power of scheduling user can improve, if it is possible to improve, the base station is to the scheduling
User sets the big step-length of transmission power to improve mark.
Scene when being reached for the OI interference coordination moment, the base station judge what its neighbor cell base station received was sent
OI indicates that when a resource correspondence position is " strong jamming " it is the neighbor cell base station to distinguish its scheduling user on the resource
Strong interferers or common interference source, and pass through and compare the scheduling performance of scheduling user and the scheduling performance door pre-set
Limit value, determine to perform the scheduling user in the resource scheduling resource adjustment operation, or the scheduling user in the resource is held
The adjustment operation of row transmission power.
Specifically include：The base station judges that the OI that its neighbor cell base station received is sent is indicated in a resource correspondence position
When being " strong jamming ", the base station judge its scheduling user on the resource be the neighbor cell base station strong interferers or
Common interference source, if the scheduling user of the base station on the resource is the strong interferers of the neighbor cell base station, and institute
State base station not to scheduling user set interference coordination mark, then the base station judge scheduling user scheduling performance whether
Not less than the scheduling performance threshold value pre-set, if be not less than, the base station sets transmission power to scheduling user
Big step-length reduces mark and interference coordination mark, if be less than, the base station performs scheduling resource adjustment behaviour to scheduling user
Make, if scheduling resource adjusts operation failure, the base station sets the small step-length of transmission power to reduce mark to scheduling user, and
Interference coordination mark is set to scheduling user；If the scheduling user of the base station on the resource is the neighbor cell base station
Common interference source, and the base station not to scheduling user set interference coordination mark, then the base station judge the tune
Whether the scheduling performance of user is spent not less than the scheduling performance threshold value pre-set, if be not less than, the base station is to this
Dispatching user sets the small step-length of transmission power to reduce mark and interference coordination mark.
It is " weak dry that the base station, which judges that the OI that its neighbor cell base station received is sent is indicated in some resource correspondence position,
Disturb " when, the base station judges whether it is provided with interference coordination mark to the scheduling user in the resource, if being not provided with doing
Coordination mark is disturbed, then the base station judges whether the transmission power of scheduling user can improve, if it is possible to improves, the base
Stand and judge whether scheduling user is Cell Center User, if Cell Center User, the base station is set to scheduling user
Put the big step-length of transmission power and improve mark；If not Cell Center User, the base station sets transmitting work(to scheduling user
The small step-length of rate improves mark.
The above method also includes：
The base station obtains scheduling performance in serving cell and is less than the scheduling performance threshold value pre-set and is not provided with
Whether the scheduling user of interference coordination mark, the transmission power that the base station judges to dispatch user can improve, if it is possible to carry
Height, then the base station is to the big step-length raising mark of scheduling user's setting transmission power；Otherwise, if can not improve, the base
Stand and scheduling resource adjustment operation is performed to scheduling user.
In the above method, scheduling resource adjustment operation is performed to scheduling user to be included：
The base station judges to whether there is idling-resource in serving cell, if there is idling-resource, the base station acquisition
The OI that neighbor cell base station is sent in idling-resource is designated as the resource of " weak jamming ", and obtains scheduling user to be adjusted at these
Scheduling performance is greater than or equal to the resource of the scheduling performance threshold value pre-set when being dispatched in resource, and the base station, which calculates, waits to adjust
Whole scheduling user loss of spectral efficiency to caused by its cooperative scheduling cell accordingly dispatches user when being dispatched in these resources, and
The resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value pre-set is obtained, the base station, which obtains, wherein treats
The optimal resource of adjustment scheduling user performance, distributes to scheduling user to be adjusted, while it is original to discharge scheduling user to be adjusted
Scheduling resource, and interference coordination mark is set for scheduling user to be adjusted；
If there is no idling-resource or in the absence of applicable idling-resource, the base station obtains in serving cell other
The OI that neighbor cell base station is sent in the scheduling resource of user is designated as the resource of " weak jamming ", and obtains scheduling user to be adjusted
When being dispatched in these resources, scheduling performance is greater than or equal to the resource of scheduling performance threshold value that pre-sets and its corresponding
User is dispatched, the scheduling user that the base station is obtained in these resources dispatches when being dispatched on scheduling user's scheduling resource to be adjusted
Performance is greater than or equal to the scheduling user of the scheduling performance threshold value pre-set and its corresponding scheduling resource, alternately adjusts
Whole user and alternative adjustresources, the base station calculate scheduling user to be adjusted and it are cooperated when being dispatched on alternative adjustresources
Scheduling cell accordingly dispatches loss of spectral efficiency caused by user, and obtains loss of spectral efficiency and be not more than the frequency spectrum pre-set
The resource of loss in efficiency threshold value, the base station obtain resource wherein optimal to scheduling user performance to be adjusted and its corresponding
Alternative adjustment user, the scheduling resource of two scheduling users is exchanged, and interference coordination mark is set for two scheduling users.
In this method, base station is that base station configures HII instruction interference coordination cycles and/or OI instruction interference according to configuration rule
Coordinate cycle and/or resource prioritization, or, it is that base station configures HII instruction interference coordination moment and/or OI according to configuration rule
Indicate interference coordination moment and/or resource prioritization.Resource prioritization, scheduling performance threshold value, loss of spectral efficiency threshold value
Configured using default configuration or by systematic unity.Joined according to the serving cell of terminal survey report and/or neighbor cell base station
Signal reception power (Reference Signal Received Power, abbreviation RSRP) is examined to judge strong interferers and commonly do
Disturb source.
The cooperative scheduling information comprises at least the cooperation cell collection of base stations of base station, the cooperative scheduling cell of user terminal
Set；The resource prioritization includes the different priority configured for the same asset of neighbor cell base station.
User's scheduling performance includes the one or more in following parameter：Dispatch the Signal to Interference plus Noise Ratio SINR of user
(Signal to Interference and Noise Ratio), dispatch signal to noise ratio snr (the Signal to Noise of user
Ratio), the signal interference ratio SIR (Signal to Interference Ratio) of user is dispatched, dispatches the modulating-coding side of user
Case MCS (Modulation and Coding Scheme) grade.
The base station adjusts mark adjustment user emission power according to power, and the power adjustment mark includes transmission power
Big step-length reduces the small step-length reduction mark of mark, transmission power, the big step-length of transmission power improves mark, the small step-length of transmission power carries
Height mark.
The above method is described in detail below by specific embodiment.
Specific embodiment one
As shown in fig. 6, base station eNB 1-eNB7 is seven adjacent base stations, there are three cells under each eNB, it is assumed that Mei Ge little
Qu Jun has 6 scheduling resource RB blocks：RB0, RB1, RB2, RB3, RB4, RB5；For three cell configuration resource prioritizations, with RB pairs
Should, by taking three cells under eNB1 as an example：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 assume a base station under three cells for the base station cooperation cell gather, base station can according to
The cooperative scheduling set of cells at family to cooperation cell gather in user carry out cooperative scheduling, such as eNB1 in Cell 1,
Gather the cooperation cell that Cell 8 and Cell 15 is eNB1.
By taking Cell 1 as an example, Cell 1 neighbor cell includes Cell 8, Cell 15, Cell 10, Cell 16, Cell
9 and Cell 21, it is assumed that when the current transmission moment is that HII indicates that interference coordination cycle due in or HII indicate interference coordination
Carve, Cell 1 performed according to the instruction of cooperative scheduling information and HII and/or OI instructions that have obtained based on cooperative scheduling information and
The interference coordination operation of resource prioritization, including：
Assuming that Cell 1 receives the HII instructions of the transmissions of Cell 10, also, Cell 1 have sent HII instructions to Cell 10,
The cooperation cell set being not belonging to due to Cell 10 where Cell 1, then it is further assumed that Cell 1 receives the transmissions of Cell 10
Resource RB2 correspondence positions are " 1 " in HII instructions, and Cell 1 is sent to Cell 10 HII instructions in resource RB2 correspondence positions
Also be " 1 " that then Cell 1 judges that its priority on resource RB2 is less than Cell 10, then Cell 1 to it in resource RB2
On scheduling user perform scheduling resource adjustment operation.
Assuming that it is " 1 " that Cell 1, which receives resource RB0 correspondence positions in the HII instructions that Cell 10 is sent, and Cell 1 is sent
HII to Cell 10 indicates in resource RB0 correspondence positions to be also " 1 ", and then Cell 1 judges that it is preferential on resource RB0
Level is higher than Cell 10, then Cell 1 sets interference coordination mark to the scheduling user on resource RB0, and judges scheduling user
Transmission power whether can improve, if can improve, Cell 1 to scheduling user set the big step-length of transmission power carry
Height mark.
Optionally, after Cell 1 completes the processing to HII instructions, Cell 1 carries out following processing：
It is resource that Cell 1, which obtains the scheduling user that scheduling performance is less than the scheduling performance threshold value pre-set in cell,
The scheduling user on the scheduling user and resource RB4 on scheduling user, resource RB2 on RB0, without setting interference coordination
The scheduling user of mark is the scheduling user on resource RB4, and then, Cell 1 judges that the transmission power of scheduling user whether can
It is enough to improve, if it is possible to improve, then Cell 1 sets the big step-length of transmission power to improve mark to scheduling user；Otherwise, if
It can not improve, then Cell 1 performs scheduling resource adjustment operation to scheduling user.
Wherein, Cell 1 performs scheduling resource adjustment operation to the scheduling user on resource RB0 (or RB4) and included：
Cell 1 judges to whether there is idling-resource in cell, and if there is idling-resource, then Cell 1 obtains idle money
The OI that neighbor cell base station is sent in source is designated as the resource of " weak jamming ", and obtains scheduling user to be adjusted in these resources
Scheduling performance is greater than or equal to the resource of the scheduling performance threshold value pre-set during scheduling, and then, Cell 1 calculates to be adjusted
User's loss of spectral efficiency to caused by its cooperative scheduling cell accordingly dispatches user when being dispatched in these resources is dispatched, and is obtained
Loss of spectral efficiency is taken to be not more than the resource of the loss of spectral efficiency threshold value pre-set, then, Cell 1 obtains wherein right
The optimal resource of scheduling user performance to be adjusted, distributes to scheduling user to be adjusted, while it is original to discharge scheduling user to be adjusted
Scheduling resource, and for it is to be adjusted scheduling user set interference coordination mark；If there is no idling-resource or in the absence of conjunction
Suitable idling-resource, the then OI that neighbor cell base station is sent in the scheduling resource of other users in the acquisitions of Cell 1 serving cell refer to
The resource of " weak jamming " is shown as, and obtains scheduling user to be adjusted scheduling performance when being dispatched in these resources and is greater than or equal in advance
The resource of the scheduling performance threshold value first set and its corresponding scheduling user, then, Cell 1 obtains the tune in these resources
Degree user scheduling performance when being dispatched on scheduling user's scheduling resource to be adjusted is greater than or equal to the scheduling performance door pre-set
The scheduling user of limit value and its corresponding scheduling resource, user and alternative adjustresources are alternately adjusted, then, Cell 1 is counted
Calculate scheduling user to be adjusted frequency spectrum to caused by its cooperative scheduling cell accordingly dispatches user when being dispatched on alternative adjustresources
Loss in efficiency, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value pre-set, then, Cell
1 obtains resource wherein optimal to scheduling user performance to be adjusted and its corresponding alternative adjustment user, exchanges two scheduling and uses
The scheduling resource at family, and interference coordination mark is set for two scheduling users.
In this specific embodiment, by taking Cell 1 as an example, Cell 1 neighbor cell includes Cell 8, Cell 15, Cell
10th, Cell 16, Cell 9 and Cell 21, wherein, the neighbor cell that the cooperation cell where being not belonging to Cell 1 is gathered is
Cell 10, Cell 16, Cell 9 and Cell 21, when Cell 1 is for neighbor cell generation HII instructions, can only it judge
Whether need to generate HII instructions for Cell 10, Cell 16, Cell 9 and Cell 21, that is to say, that Cell 1 only for
The neighbor cell generation HII instructions that cooperation cell where being not belonging to Cell 1 is gathered.So, when HII instruction interference coordination weeks
When phase arrival or HII instruction interference coordination moment reach, Cell 1 indicates according to the cooperative scheduling information and HII obtained
And/or OI instructions are performed and operated based on the interference coordination of cooperative scheduling information and resource prioritization, also, if Cell 1 is received
The HII instructions that some neighbor cell is sent, then only need to judge whether Cell 1 have sent HII to the neighbor cell and indicate,
It is no longer needed for judging the cooperation cell the set whether neighbor cell is not belonging to where Cell 1.The interference coordination process can be with
The signaling consumption of interaction HII instructions between reduction neighbor cell base station.
In this specific embodiment, interference coordination moment, base are indicated in HII interference coordination cycles due in or in HII
Standing, it is excellent based on cooperative scheduling information and resource to be performed according to the instruction of cooperative scheduling information and HII and/or OI instructions that have obtained
The interference coordination operation of first level, adjusts user's scheduling resource or transmission power, to reduce inter-cell interference, improves systematic function.
Specific embodiment two
As shown in fig. 6, base station eNB 1-eNB7 is seven adjacent base stations, there are three cells under each eNB, it is assumed that Mei Ge little
Qu Jun has 6 scheduling resource RB blocks：RB0, RB1, RB2, RB3, RB4, RB5；Assuming that three cells under a base station are the base
The cooperation cell set stood, the user during base station can gather cooperation cell according to the cooperative scheduling set of cells of user are carried out
Gather the cooperation cell that Cell 1, Cell 8 and Cell 15 in cooperative scheduling, such as eNB1 are eNB1.
By taking Cell 1 as an example, Cell 1 neighbor cell includes Cell 8, Cell 15, Cell 10, Cell 16, Cell
9 and Cell 21, it is assumed that when the current transmission moment is that OI indicates that interference coordination cycle due in or OI indicate interference coordination
Carve, Cell 1 is performed according to cooperative scheduling information and the OI instruction obtained and is based on user's scheduling performance and cooperative scheduling information
Interference coordination operation, including：
Assuming that the OI that Cell 1 receives the transmissions of Cell 9 indicates in resource RB1 correspondence positions to be " strong jamming ", then Cell 1
Judge whether the scheduling user on resource RB1 is Cell 9 strong interferers or common interference source.If scheduling user is
Cell 9 strong interferers, and Cell 1 does not set interference coordination mark to scheduling user, then Cell 1 judges the scheduling
Whether the scheduling performance of user is not less than the scheduling performance threshold value pre-set, if be not less than, Cell 1 is to the scheduling
User sets the big step-length of transmission power to reduce mark and interference coordination mark；Otherwise, if be less than, Cell 1 is used the scheduling
Family performs scheduling resource adjustment operation, also, if scheduling resource adjusts operation failure, then Cell 1 is set to scheduling user
The small step-length of transmission power reduces mark, and sets interference coordination mark to scheduling user.If scheduling user is Cell 9
Common interference source, and Cell 1 not to scheduling user set interference coordination mark, then Cell 1 judge scheduling user
Scheduling performance whether not less than the scheduling performance threshold value that pre-sets, if be not less than, Cell 1 is to scheduling user
The small step-length of transmission power is set to reduce mark and interference coordination mark.
Further, present in being indicated as the OI that each neighbor cells for completing to receive it of Cell 1 are sent " strong jamming "
After the processing of instruction, " weak jamming " instruction present in the OI instructions for each neighbor cell transmission that Cell 1 receives to it is carried out
Processing：
Assuming that the OI that Cell 1 receives the transmissions of Cell 9 indicates in resource RB3 correspondence positions to be " weak jamming ", then Cell 1
Judge whether it is provided with interference coordination mark to the scheduling user on resource RB3, if being not provided with interference coordination mark,
Cell 1 judges whether the transmission power of scheduling user can improve, if it is possible to improves, then Cell 1 judges that the scheduling is used
Whether family is Cell Center User, if Cell Center User, then Cell 1 sets the big step of transmission power to scheduling user
It is long to improve mark；Otherwise, if not Cell Center User, then Cell 1 sets the small step-length of transmission power to carry scheduling user
Height mark.
Further, present in being indicated as the OI that each neighbor cells for completing to receive it of Cell 1 are sent " weak jamming "
After the processing of instruction, Cell 1 carries out following processing：
Cell 1 obtains the scheduling user that scheduling performance in cell is less than the scheduling performance threshold value pre-set, it is assumed that is
The scheduling user on scheduling user and resource RB5 on resource RB1, it is without the scheduling user of interference coordination mark is set
Scheduling user on resource RB5, then, Cell 1 judges whether the transmission power of scheduling user can improve, if it is possible to
Improve, then Cell 1 sets the big step-length of transmission power to improve mark to scheduling user；Otherwise, if can not improve, Cell
1 couple of scheduling user performs scheduling resource adjustment operation.
Wherein, Cell 1 performs scheduling resource adjustment operation to the scheduling user on resource RB1 (or RB5) and included：
Cell 1 judges to whether there is idling-resource in cell, and if there is idling-resource, then Cell 1 obtains idle money
The OI that neighbor cell base station is sent in source is designated as the resource of " weak jamming ", and obtains scheduling user to be adjusted in these resources
Scheduling performance is greater than or equal to the resource of the scheduling performance threshold value pre-set during scheduling, and then, Cell 1 calculates to be adjusted
User's loss of spectral efficiency to caused by its cooperative scheduling cell accordingly dispatches user when being dispatched in these resources is dispatched, and is obtained
Loss of spectral efficiency is taken to be not more than the resource of the loss of spectral efficiency threshold value pre-set, then, Cell 1 obtains wherein right
The optimal resource of scheduling user performance to be adjusted, distributes to scheduling user to be adjusted, while it is original to discharge scheduling user to be adjusted
Scheduling resource, and for it is to be adjusted scheduling user set interference coordination mark；If there is no idling-resource or in the absence of conjunction
Suitable idling-resource, the then OI that neighbor cell base station is sent in the scheduling resource of other users in the acquisitions of Cell 1 serving cell refer to
The resource of " weak jamming " is shown as, and obtains scheduling user to be adjusted scheduling performance when being dispatched in these resources and is greater than or equal in advance
The resource of the scheduling performance threshold value first set and its corresponding scheduling user, then, Cell 1 obtains the tune in these resources
Degree user scheduling performance when being dispatched on scheduling user's scheduling resource to be adjusted is greater than or equal to the scheduling performance door pre-set
The scheduling user of limit value and its corresponding scheduling resource, user and alternative adjustresources are alternately adjusted, then, Cell 1 is counted
Calculate scheduling user to be adjusted frequency spectrum to caused by its cooperative scheduling cell accordingly dispatches user when being dispatched on alternative adjustresources
Loss in efficiency, and obtain the resource that loss of spectral efficiency is not more than the loss of spectral efficiency threshold value pre-set, then, Cell
1 obtains resource optimal to scheduling user performance to be adjusted in alternative adjustresources and its corresponding alternative adjustment user, exchanges
The scheduling resource of two scheduling users, and interference coordination mark is set for two scheduling users.
In this specific embodiment, interference coordination moment, base station are indicated in OI interference coordination cycles due in or in OI
Cooperative scheduling information and OI instruction according to having obtained performs the interference based on user's scheduling performance and cooperative scheduling information and assisted
Operation is adjusted, adjusts user's scheduling resource or transmission power, to reduce inter-cell interference, improves systematic function.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually any combination.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art
The protection domain of appended claims of the invention should all be belonged to.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, can also use the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (12)
1. a kind of method for carrying out cooperative scheduling inter-cell uplink interference coordination, wherein,
When up high interference instruction (HII) interference coordination moment reaches, base station according to the cooperative scheduling information obtained and from
The up high interference instruction (HII) and/or uplink interference overload instruction (OI) that neighbor cell base station receives, are believed based on cooperative scheduling
Breath and resource prioritization perform interference coordination operation, adjust the scheduling resource and/or transmission power of user terminal；
Uplink interference overload instruction (OI) interference coordination moment is when reaching, base station according to the cooperative scheduling information obtained and from
The uplink interference overload instruction (OI) that neighbor cell base station receives, interference is performed based on cooperative scheduling information and user's scheduling performance
Coordinated manipulation, adjust the scheduling resource and/or transmission power of user terminal；
Wherein, the cooperative scheduling information comprises at least the cooperation cell collection of base stations of base station, and the cooperative scheduling of user terminal is small
Gather in area；
The resource prioritization includes the different priority configured for the same asset of neighbor cell base station.
2. the method as described in claim 1, it is characterised in that
HII interference coordination moment and OI interference coordination moment were located in the base station scheduling cycle, the OI in the same base station scheduling cycle
The interference coordination moment is between the adjacent HII interference coordination moment or after the HII interference coordination moment.
3. the method as described in claim 1, it is characterised in that
The time interval between the adjacent HII interference coordinations moment within the same base station scheduling cycle is identical, HII interference coordinations
Cycle is less than the base station scheduling cycle；
Between the adjacent OI interference coordinations moment within the same base station scheduling cycle or in the same HII interference coordinations cycle when
Between be spaced identical, the OI interference coordination cycles are equal to or less than the HII interference coordination cycles.
4. the method as described in claim 1, it is characterised in that
The base station determines that the base station produces the resource of up high interference with neighbor cell base station, is existed by the base station
Priority and priority of the neighbor cell base station in this resource in this resource, determine to perform the scheduling user in the resource
Scheduling resource adjustment operation, or transmission power adjustment operation is performed to the scheduling user in the resource.
5. method as claimed in claim 4, it is characterised in that
The base station judges whether to meet the HII that the i.e. described base station of following two conditions have received neighbor cell base station transmission simultaneously
Instruction, the base station have sent HII instructions to this neighbor cell base station, or judge whether also while meet following condition i.e. institute
The cooperation cell collection of base stations that neighbor cell base station is not belonging to the base station is stated, if it is, for a resource, if the base station
Receiving the HII instructions of neighbor cell base station transmission, in the resource correspondence position to be that " 1 " and the base station are sent to this adjacent small
It is also " 1 " that the HII of area base station, which is indicated in the resource correspondence position, then whether the base station judges its priority on the resource
Less than the priority of neighbor cell base station on the resource, if be less than, the base station performs to the scheduling user in the resource
Scheduling resource adjustment operation, if it is, the base station sets interference coordination mark to the scheduling user in the resource, and judges
Whether the transmission power of scheduling user can improve, if it is possible to improve, the base station sets transmitting work(to scheduling user
The big step-length of rate improves mark.
6. the method as described in claim 1, it is characterised in that
The base station judges that the OI that its neighbor cell base station received is sent is indicated when a resource correspondence position is " strong jamming ",
It is the strong interferers of the neighbor cell base station or common interference source to distinguish its scheduling user on the resource, and passes through and compare
The scheduling performance of scheduling user and the scheduling performance threshold value pre-set, determine to perform tune to the scheduling user in the resource
Resource adjustment operation is spent, or transmission power adjustment operation is performed to the scheduling user in the resource.
7. method as claimed in claim 6, it is characterised in that
The base station judges that the OI that its neighbor cell base station received is sent is indicated when a resource correspondence position is " strong jamming ",
The base station judges that its scheduling user on the resource is the strong interferers of the neighbor cell base station or common interference source, such as
The scheduling user of base station described in fruit on the resource is the strong interferers of the neighbor cell base station, and the base station is not to this
Dispatch user and interference coordination mark is set, then whether the base station judges the scheduling performance of scheduling user not less than pre-setting
Scheduling performance threshold value, if be not less than, the base station sets the big step-length of transmission power to reduce mark scheduling user
With interference coordination mark, if be less than, the base station performs scheduling resource adjustment operation to scheduling user, if scheduling resource
Operation failure is adjusted, the base station sets the small step-length of transmission power to reduce mark to scheduling user, and scheduling user is set
Put interference coordination mark；If the scheduling user of the base station on the resource is the common interference source of the neighbor cell base station,
And the base station does not set interference coordination mark to scheduling user, then the base station judges the scheduling of scheduling user
Can be whether not less than the scheduling performance threshold value pre-set, if be not less than, the base station sets to scheduling user and sent out
Penetrating the small step-length of power reduces mark and interference coordination mark.
8. the method as described in claim 1, it is characterised in that
The base station judges the OI that its neighbor cell base station received is sent indicates in some resource correspondence position it is " weak jamming "
When, the base station judges whether it is provided with interference coordination mark to the scheduling user in the resource, if being not provided with disturbing
Coordinate mark, then the base station judges whether the transmission power of scheduling user can improve, if it is possible to improves, the base station
Judge whether scheduling user is Cell Center User, if Cell Center User, the base station is set to scheduling user
The big step-length of transmission power improves mark；If not Cell Center User, the base station sets transmission power to scheduling user
Small step-length improves mark.
9. the method as described in any in claim 1,6,7, it is characterised in that
User's scheduling performance includes the one or more in following parameter：The Signal to Interference plus Noise Ratio of user is dispatched, dispatches user's
Signal to noise ratio, the signal interference ratio of user is dispatched, dispatch the Modulation and Coding Scheme grade of user.
10. the method as described in any in claim 4,5,6,7,8, it is characterised in that
Methods described also includes：
The base station obtains scheduling performance in serving cell and is less than the scheduling performance threshold value pre-set and is not provided with disturbing
Coordinate the scheduling user of mark, whether the transmission power that the base station judges to dispatch user can improve, if it is possible to improve, then
The base station sets the big step-length of transmission power to improve mark to scheduling user；Otherwise, if can not improve, the base station is exchanged
Spend user and perform scheduling resource adjustment operation.
11. the method as described in any in claim 4,5,6,7, it is characterised in that
Described couple of scheduling user, which performs scheduling resource adjustment operation, to be included：
The base station judges to whether there is idling-resource in serving cell, and if there is idling-resource, the base station acquisition is idle
The OI that neighbor cell base station is sent in resource is designated as the resource of " weak jamming ", and obtains scheduling user to be adjusted in these resources
Scheduling performance is greater than or equal to the resource of the scheduling performance threshold value pre-set during upper scheduling, and the base station calculates tune to be adjusted
User's loss of spectral efficiency to caused by its cooperative scheduling cell accordingly dispatches user when being dispatched in these resources is spent, and is obtained
Loss of spectral efficiency is not more than the resource of the loss of spectral efficiency threshold value pre-set, and the base station is obtained wherein to be adjusted
The optimal resource of user performance is dispatched, distributes to scheduling user to be adjusted, while discharges the scheduling original scheduling of user to be adjusted
Resource, and interference coordination mark is set for scheduling user to be adjusted；
Other users in serving cell are obtained if there is no idling-resource or in the absence of applicable idling-resource, the base station
Scheduling resource in neighbor cell base station send OI be designated as the resource of " weak jamming ", and obtain it is to be adjusted scheduling user at this
Scheduling performance is greater than or equal to the resource of the scheduling performance threshold value pre-set and its corresponding scheduling when being dispatched in a little resources
User, the base station obtain scheduling user in these resources scheduling performance when being dispatched on scheduling user's scheduling resource to be adjusted
Scheduling user and its corresponding scheduling resource greater than or equal to the scheduling performance threshold value pre-set, alternately adjustment are used
Family and alternative adjustresources, the base station calculate scheduling user to be adjusted when being dispatched on alternative adjustresources to its cooperative scheduling
Cell accordingly dispatches loss of spectral efficiency caused by user, and obtains loss of spectral efficiency and be not more than the spectrum efficiency pre-set
Lose the resource of threshold value, the base station obtains resource wherein optimal to scheduling user performance to be adjusted and its corresponding alternative
User is adjusted, exchanges the scheduling resource of two scheduling users, and interference coordination mark is set for two scheduling users.
12. a kind of system for carrying out cooperative scheduling inter-cell uplink interference coordination, including base station, wherein,
The base station includes uplink interference coordination processing module；
The uplink interference coordination processing module, for up high interference instruction (HII) interference coordination moment reach when, according to
The cooperative scheduling information and the up high interference instruction (HII) received from neighbor cell base station and/or uplink interference obtained
Overload instruction (OI), interference coordination operation is performed based on cooperative scheduling information and resource prioritization, adjusts the scheduling of user terminal
Resource and/or transmission power；
It is additionally operable to when uplink interference is overloaded instruction (OI) interference coordination moment and reached, according to the cooperative scheduling information obtained
Uplink interference overload instruction (OI) with being received from neighbor cell base station, is performed based on cooperative scheduling information and user's scheduling performance
Interference coordination operates, and adjusts the scheduling resource and/or transmission power of user terminal；
Wherein, the cooperative scheduling information comprises at least the cooperation cell collection of base stations of base station, and the cooperative scheduling of user terminal is small
Gather in area；
The resource prioritization includes the different priority configured for the same asset of neighbor cell base station.
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| CN103249134A (en) * | 2012-02-13 | 2013-08-14 | 中兴通讯股份有限公司 | Coordinating method and system for inter-cell uplink interferences |
| CN104717732A (en) * | 2015-03-25 | 2015-06-17 | 大唐移动通信设备有限公司 | Uplink interference suppressing method and device |
| CN108632856B (en) * | 2017-03-24 | 2021-06-11 | 中国移动通信集团广东有限公司 | Processing method for determining target neighbor cell and server |
| CN109922499B (en) * | 2017-12-12 | 2022-04-22 | 成都鼎桥通信技术有限公司 | Self-adaptive pre-scheduling method and device |
| CN111083790B (en) * | 2018-10-19 | 2022-09-09 | 成都鼎桥通信技术有限公司 | Scheduling control method and device |
| CN109640337B (en) * | 2018-12-07 | 2020-05-22 | 华南理工大学 | NB-IoT system adaptive scheduling method |
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