In concrete enforcement, when calculating slot priorities, according to the measured value of acquisition and the control of two switches, can add up total interference value to h descending time slot of the jth of a Target cell carrier wave, N is interference adjacent area number; Like this at use TCP measured value, through the control of two switches, and the consideration of path loss weighting, finally obtain slot priorities, because concrete account form is a lot, as long as total the mode that can count the interference value of a time slot can adopt, can not enumerate here, in above-mentioned two kinds of modes, formula 3 describes a kind of priority account form not considering Target cell TCP; Formula 4 describes a kind of priority account form considering Target cell TCP.
Mode two
Each carrier wave of each community under current RNC, descending time slot TCP cycle are being upgraded, during in order to interference coordination reference, because TCP is NodeB public measured value, and the different UE in multiple position may be there is in this descending time slot, these UE are different from the current position relation switching UE, and the interference caused is not identical yet.Therefore, further, can also implement as follows to reach descending interference assessment more accurately.
1, AOA (the Angel OfArrival of user of each carrier wave in all communities under current RNC, each time slot is obtained, angle of arrival) and TCP special measurement information, in concrete enforcement, these parameters also can by being configured to NodeB periodic report or reporting events obtains;
2, the PCCPCH_RSCP information of all connection UE under obtaining current RNC, in concrete enforcement, these parameters also can by being configured to UE periodic report or reporting events; Reporting schemes can comprise:
1), all UE periodic report pilot measurements are configured.
2), introduce new event definition, all trigger UE when meeting entry condition or meeting and leave condition and report measurement report.Cai the measurement report of general switching is the reporting measurement reports when meeting entry condition only, in order to the measurement report supporting interference coordination to need, adding and also triggering UE reporting measurement reports when meeting and leaving condition.Whether meet leave condition time reporting measurement reports can be controlled by a parameter ReportOnLeave.Specifically can with reference to the A3 event implementation in TS36.331.
In enforcement, according to the AOA of the user of each carrier wave, each time slot, can correct by the interference of GOB directional diagram to each time slot.
The meaning corrected is tabled look-up on GOB directional diagram in user AOA direction, and obtain the upwards possible figuration gain of actual the party, with later to the weighting of transmitting power, to embody the effect of intelligent antenna figuration.
Carry out angular divisions to the AOA according to each reporting of user below, the enforcement calculating descending interference is more accurately described.
For every time slot single user, directly by TCP stored in the corresponding list cell in maximum direction.
For the situation of every time slot multi-user, need to calculate respectively, a more comprehensive maximum direction unit stored in.Computational methods are as follows:
GOB (the Grid Of Beam of the coupling antenna type of preservation different districts, RNC side, beam scanning method) directional diagram, according to the estimation of AOA, in directional diagram with AOA direction for maximum, and with the angle of figuration direction maximum within a thresholding (such as 3dB), confirm its position in the following table.For multi-user, need by the directional diagram of multiple user superpose, and consider with the angle of figuration direction maximum in a threshold range, respectively stored in.
For aforesaid way, only save the angle interference in maximum direction, do not think over the impact of secondary lobe, can by consider more carefully by every user side of completing to superposition stored in, superpose at next step, to obtain better effect.Due to the inaccuracy that directional diagram is estimated, here may be more effective for larger differential seat angle.
RNC side periodic maintenance one can consider the interference reference quantity in direction, can pass through a switch here, considers the interference assessment of carrying out different accuracy.When the switch is closed, consider a kind of assessment roughly, choose a kind of periodic maintenance as following table namely to each community, can select any spacing for angular range, only example is wherein a kind of below:
For certain carrier wave, for certain sector, every 10 degree of reservations one value, TCP ' represents the slot transmission power after weighted direction
TCP ' AOA angular range |
TS1 |
TS2 |
TS3 |
TS4 |
TS5 |
TS6 |
-59 to-50 |
|
|
|
|
|
|
-49 to-40 |
|
|
|
|
|
|
... |
|
|
|
|
|
|
-9 to 0 |
|
|
|
|
|
|
1 to 10 |
|
|
|
|
|
|
11 to 20 |
|
|
|
|
|
|
... |
|
|
|
|
|
|
51 to 60 |
|
|
|
|
|
|
During for switch opens, according to the PCCPCH RSCP of every user's periodic report above, the path loss that can obtain every user is:
PathLoss=PCCPCH_Power-PCCPCH_RSCP (formula 5)
Then after the path loss obtaining each UE, approximate calculation can go out current area each descending time slot of certain carrier wave to the interference of other community, for numerous method, only list two kinds here:
For K user of a jth carrier wave h descending time slot, consider that it takies the impact of resource and path loss:
(formula 6)
BRU_NUM
krefer to BRU (Basic Resource Unit, the basic resources unit) number shared by a kth user.
For K user of a jth carrier wave h descending time slot, consider that it takies the impact of resource and path loss and AOA:
Formula 7
Wherein: Directional_Coeff (AOA_est
i, k) be the figuration gain that AOA finds on GOB directional diagram.
RNC side periodic maintenance one considers the interference reference quantity in direction, chooses a kind of periodic maintenance as following table to each community:
TCP ' represents the slot transmission power after weighted direction
TCP’ |
TS1 |
TS2 |
TS3 |
TS4 |
TS5 |
TS6 |
Carrier wave 1 |
|
|
|
|
|
|
Carrier wave 2 |
|
|
|
|
|
|
... |
|
|
|
|
|
|
Carrier wave N |
|
|
|
|
|
|
To need for current the UE using new resources in Target cell, the interference reference information that first two steps can be used to obtain at RNC carries out interference to be evaded.
TCP ' is revised TCP value, still reports with the percents of maximum transmission power, by certain processing method, the TCP ' of (between RSPA plate) adjacent area between plate can be made to obtain in the storage area of this plate neighboring BS information.
For N number of homogeneous-frequency adjacent-domain of all current time slots, for Target cell jth carrier wave h descending time slot, calculate its priority, because statistical is a lot, illustrating here is only wherein two kinds:
When precise evaluation switch opens,
(formula 8)
When precise evaluation switch cuts out,
(formula 9)
As can be seen from above-mentioned enforcement.In mode one, TCP '
i, j, haccount form is:
or TCP '
i, j, h=TCP '
i, j, h;
P
j, haccount form is:
Or,
In mode two, TCP '
i, j, account form is:
Or,
P
j, haccount form is:
Or
Wherein, mode one is a kind of simplification evaluation measures; Second mode is one evaluation measures more accurately; Two kinds of modes have all used this statistic of TCP, and a mode one parameter alpha characterizes the weight coefficient of path loss change; And mode two is except TCP, also directive gain (directional_coeff) be have selected to each UE, and accurate circuit loss value (pathloss), so more accurate than alpha.
Two, the determination of the community of interference coordination is carried out.
When determining slot priorities, need to determine each interference adjacent cell, below to how determining that interference adjacent cell is described.
Fig. 2 is the cell determining method implementing procedure schematic diagram carrying out interference coordination, as shown in the figure, can comprise the steps:
The measurement report that step 201, acquisition UE report;
Step 202, obtain the Pilot Measurement of cell-of-origin, Target cell and other adjacent area according to measurement report;
Step 203, determine the community of carrying out interference coordination according to Pilot Measurement.
When obtaining the measurement report that UE reports, can one of in the following manner or combination obtain measurement report:
The internal measurement report acquisition measurement report that the alien frequencies event that the same frequency event reported by UE in handoff procedure obtains measurement report, reported by UE in handoff procedure is obtained measurement report, reported by UE in handoff procedure.
Concrete, step 201,202 enforcement in, the same frequency event (as 1G) that can report according to UE in handoff procedure, alien frequencies event (as 2A), inner (additional with frequency/alien frequencies) measurement report, obtain the Pilot Measurement of cell-of-origin, Target cell and other adjacent area, and will the Neighboring Cell List of Target cell be obtained, can AdjCellList be denoted as in enforcement.
In enforcement, obtaining Pilot Measurement is do for the resource selection under handoff scenario, so in order to simple implementation, can adopt handover measurement reporting information to select the community will carrying out interference coordination; Certainly, each NodeB and UE measurement under RNC can be allowed to report, but implement more complicated like this.
In the enforcement of step 203, when determining the community of carrying out interference coordination according to Pilot Measurement, the community of carrying out interference coordination can be determined in the following manner:
PCCPCH_RSCP
targetCell-PCCPCH_RSCP
otherCell-i< δ (formula 10), wherein:
PCCPCH_RSCP
targetCellfor the Pilot Measurement value of Target cell,
PCCPCH_RSCP
otherCell-ifor the Pilot Measurement value of adjacent area i,
δ is Target cell and neighbor pilot difference, in enforcement, in order to avoid being selected in of too many more weak adjacent area, therefore sets this thresholding.
In formula, the PCCPCH of PCCPCH_RSCP is basic Common Control Physical Channel (PrimaryCommon Control Physical Channel), RSCP is received signal code power (Received SignalCode Power).This value is selected to use, because this value generally can be thought " reception pilot signal strength ", that a UE accesses community, and the important parameter used in the judgement of switching cell, namely this value must be greater than a certain thresholding just accessible (such as-85dBm), this value difference of two communities is greater than some thresholdings just can adjudicate switching, and therefore this value is one of crucial factor, therefore selects it.In enforcement, also can adopt other parameters, be want to reach phase same-action.
Concrete, for each adjacent area, just can judge by after the Pilot Measurement of searching each community in AdjCellList.
Further, can further include in enforcement: when not comprising cell-of-origin in the community of determining to carry out interference coordination according to Pilot Measurement, cell-of-origin is increased in the community of carrying out interference coordination.
Concrete, be met all interference Neighboring Cell List of formula 10; If list does not comprise cell-of-origin, then supplement and add, and think that the pilot tone of cell-of-origin is PCCPCH_RSCP
targetCell-th
switch relative threshold, in order to increase, the weighting of cell-of-origin interference is considered.In enforcement, in formula 10, do not comprise the judgement of cell-of-origin, but after being met all interference Neighboring Cell List of formula 10, if list does not comprise cell-of-origin, then supplementing and add, and think that the pilot tone of cell-of-origin is PCCPCH_RSCP
targetCell-th
change relative threshold, to increase, the weighting of cell-of-origin interference is considered.Due to the N number of dB in cell-of-origin should be greater than in Target cell, the switching dependent threshold namely in formula when switching, so be weighted to Target cell pilot value-relative threshold to it.
The object of above-mentioned enforcement is: use adjacent area that handover measurement reports to determine the scope of interference coordination alternative cell; And poor according to the received power of switching UE to Zhong Ge adjacent area, interference coordination alternative cell, remove the adjacent area that interference is more weak, thus avoided multiprocessing and increased error; Finally also supplemented cell-of-origin and enter, it is more thorough to make the consideration of interference.
Three, the sortord of slot priorities.
Fig. 3 carries out by the sequence of slot priorities the method implementing procedure schematic diagram that accesses, as shown in the figure, can comprise the steps:
Step 301, in the queue of current SDCA slot priorities, shielding TCP interference value is greater than the DL time slot of thresholding;
Step 302, according to shielding after the list of SDCA slot priorities access;
Step 303, reduction of speed is carried out to the UE of access failure;
If still with regard to access failure after step 304 reduction of speed, after all UL, DL time slots are all obtained slot priorities list according to the sequence of SDCA time slot queuing strategy, access.
All UL, DL time slots refer to is deleting those time slots that DL time slot that TCP interference value is greater than thresholding deletes at interior all time slots.
In enforcement, when carrying out carrier wave/time slot sequence to Target cell, receiving, SDCA (the Slow Dynamic Channel Allocation of Target cell, slow dynamic channel allocation) carrier frequencies method acquiescence adopts NodeB public-measurement, DL (Down Link, down link) time slot queuing strategy acquiescence employing NodeB public-measurement, UL (Up Link, up link) time slot queuing strategy does not require the method still adopting community originally to configure here.When DL adopts TCP to measure, can with reference to the P obtained in aforementioned formula
j, henforcement.In enforcement, the SDCA adopted is a kind of RRM (Radio Resource Management, RRM) algorithm, the mode of adjustment can according to the BRU of the business different choice of fixing queuing, fixed service (Basic Resource Unit, basic resources unit) several queueing form such as resource selection, also can control the uplink and downlink timeslot of the priority access of each carrier frequency in every community (N frequency).Then the SDCA based on public-measurement in the present embodiment.
In order to prevent certain carrier wave from both there is the maximum DL time slot of TCP, there is again the DL time slot that TCP is minimum, finally comprehensively getting off this carrier wave still by situation about coming above.Here 2 resources of taking turns are adopted to attempt:
The first round, the time slot that total interference TCP of DL time slot is more than or equal to thresholding (configurable under community) is deleted, according to above-mentioned said SDCA carrier wave/time slot queuing strategy, sorts, obtain carrier wave/slot priorities list, access.During carrier wave sequence, the total number of DL time slot needs to deduct deleted time slot.If access failure, need to attempt reduction of speed, if still just failure after reduction of speed, enter next round.
Second takes turns, and all UL, DL time slots all participate in above-mentioned said SDCA carrier wave/time slot queuing strategy, sort, obtain carrier wave/slot priorities list, access.
Further, can also take number of resources difference according to business, carrier wave priority and slot priorities can be considered simultaneously.
When after the priority weighting obtaining all uplink and downlink timeslots, carrier wave priority does not re-use the average weight sequence of all time slots, but from each carrier wave, select the uplink/downlink time slot combinations meeting resource requirement, and obtained the priority weighting of this combination by up-downgoing weighting.The up-downgoing demand of such as to be switched business is single time slot, then calculate following table according to the slot priorities factor:
Combination of resources |
Priority weighting |
Combination of resources |
Priority weighting |
Carrier wave 1 TS1/TS3 |
|
Carrier wave 2 TS1/TS3 |
|
Carrier wave 1 TS1/TS4 |
|
Carrier wave 2 TS1/TS4 |
|
Carrier wave 1 TS1/TS5 |
|
Carrier wave 2 TS1/TS5 |
|
Carrier wave 1 TS1/TS6 |
|
Carrier wave 2 TS1/TS6 |
|
Carrier wave 1 TS2/TS3 |
|
Carrier wave 2 TS2/TS3 |
|
Carrier wave 1 TS2/TS4 |
|
Carrier wave 2 TS2/TS4 |
|
Carrier wave 1 TS2/TS5 |
|
Carrier wave 2 TS2/TS5 |
|
Carrier wave 1 TS2/TS6 |
|
Carrier wave 2 TS2/TS6 |
|
...... |
...... |
...... |
...... |
Finally, sort to the priority of all alternative resource combinations calculated, the time slot combinations of prioritizing selection the best carries out Resourse Distribute trial.
Based on same inventive concept, the radio network controller for determining slot priorities is additionally provided, for determining the radio network controller of the sortord of slot priorities in the embodiment of the present invention, the defining method of the principle of dealing with problems due to these equipment and slot priorities, the method being undertaken accessing by the sequence of slot priorities are similar, therefore the enforcement of these equipment see the enforcement of method, can repeat part and repeats no more.
Fig. 4 is the radio network controller structural representation for determining slot priorities, as shown in the figure, when determining the slot priorities of the community of carrying out interference coordination, can comprise in radio network controller:
TCP acquisition module 401, for obtaining each TCP carrying out each descending time slot of the interference adjacent cell of interference coordination;
Priority Determination module 402, for determining slot priorities according to TCP.
In enforcement, TCP acquisition module can also be further used for obtaining described TCP in the storage area of the neighboring BS information of local RSPA.
In enforcement, TCP acquisition module can also be further used for processing in the following manner TCP:
wherein: α
ifor the path loss weighted value calculated by PCCPCH information;
When each community PCCPCH transmitting power is identical:
α
i=(PCCPCH_RSCP
i-PCCPCH_RSCP
t)
Or, when each community PCCPCH transmitting power is different:
α
i=(PCCPCH_RSCP
i-PCCPCH_Power
i)-(PCCPCH_RSCP
t-PCCPCH_Power
t), wherein:
I subscript represents current interfered cell, and t subscript represents Target cell, and unit is h the descending time slot that dB, j, h represent a jth carrier wave of community respectively, α
irepresent the path loss weighting coefficient values of i-th interfered cell, PCCPCH_RSCP is Pilot Measurement value, and PCCPCH_Power represents the transmitting power of PCCPCH.
In enforcement, Priority Determination module can also be further used for when determining slot priorities according to TCP, determines by following formula:
Wherein:
J, h represent h descending time slot of a jth carrier wave of community respectively, and N is interference adjacent area number, and i subscript represents current interfered cell, MaxTransPoweri Shi Gai community maximum transmission power, P
j, hfor the priority of h descending time slot of a jth carrier wave.
In enforcement, TCP acquisition module can also be further used for the TCP of each descending time slot obtaining this community;
Priority Determination module can also be further used for determining slot priorities according to the TCP of this community and each interference adjacent cell.
In enforcement, Priority Determination module can also be further used for when determining slot priorities according to TCP, by following formula process:
, wherein:
J, h represent h descending time slot of a jth carrier wave of community respectively, and N is interference adjacent area number, and i subscript represents current interfered cell, and t is Target cell, MaxTransPower
ishi Gai community maximum transmission power, P
j, hfor the priority of h descending time slot of a jth carrier wave.
In enforcement, the PCCPCH_RSCP information of TCP acquisition module all connection UE under can also being further used for obtaining current RNC; And the path loss of each UE is obtained by following formula:
PathLoss=PCCPCH_Power-PCCPCH_RSCP, wherein,
PathLoss is the path loss of UE, and PCCPCH_Power is the PCCPCH transmitting power of UE, and PPCCPCH_RSCP is the Pilot Measurement value of UE.
In enforcement, TCP acquisition module can also be further used for processing in the following manner the TCP of K user of a jth carrier wave h descending time slot:
Wherein:
BRU_NUM
krefer to the basic resources unit BRU number shared by a kth user.
In enforcement, Priority Determination module can also be further used for when determining slot priorities according to TCP, by following formula process:
For N number of homogeneous-frequency adjacent-domain of all current time slots, for Target cell jth carrier wave h descending time slot,
Consider AOA factor, can further include in radio network controller:
AOA acquisition module 403, for the AOA of the user of each carrier wave in all communities, each time slot under obtaining current RNC.
In enforcement, TCP acquisition module can also be further used for the AOA of the user according to each carrier wave, each time slot, corrects by the interference of GOB directional diagram to each time slot.
In enforcement, TCP acquisition module can also be further used for processing in the following manner the TCP of K user of a jth carrier wave h descending time slot:
Wherein: Directional_Coeff (AOA_est
i, k) be the figuration gain that AOA finds on GOB directional diagram.
In enforcement, Priority Determination module can also be further used for when determining slot priorities according to TCP, by following formula process:
For N number of homogeneous-frequency adjacent-domain of all current time slots, for Target cell jth carrier wave h descending time slot,
In enforcement, can further include in radio network controller:
Measurement report module 404, for obtaining the measurement report that UE reports;
Measurement result module 405, for obtaining the Pilot Measurement of cell-of-origin, Target cell and other adjacent area according to measurement report;
Interfered cell determination module 406, for determining the community of carrying out interference coordination according to Pilot Measurement.
In enforcement, measurement result module can also be further used for when obtaining the measurement report that UE reports, one of in the following manner or combination obtain measurement report:
The internal measurement report acquisition measurement report that the alien frequencies event that the same frequency event reported by UE in handoff procedure obtains measurement report, reported by UE in handoff procedure is obtained measurement report, reported by UE in handoff procedure.
In enforcement, interfered cell determination module can also be further used for, when determining the community of carrying out interference coordination according to Pilot Measurement, determining the community of carrying out interference coordination in the following manner:
PCCPCH_RSCP
targetCell-PCCPCH_RSCP
otherCell-i< δ, wherein:
PCCPCH_RSCP
targetCellfor the Pilot Measurement value of Target cell,
PCCPCH_RSCP
otherCell-ifor the Pilot Measurement value of adjacent area i,
δ is Target cell and neighbor pilot difference.
In enforcement, when interfered cell determination module can also be further used for not comprising cell-of-origin in the community of determining to carry out interference coordination according to Pilot Measurement, cell-of-origin is increased in the community of carrying out interference coordination.
In enforcement, interfered cell determination module can also be further used for the pilot tone of cell-of-origin by PCCPCH_RSCP
targetCell-th
switch relative thresholdprocess.
Fig. 5 is the radio network controller structural representation of the sortord for determining slot priorities, as shown in the figure, after determining slot priorities, can comprise in radio network controller:
Shroud module 501, in the queue of current SDCA slot priorities, shielding TCP interference value is greater than the DL time slot of thresholding;
First access module 502, for accessing according to the SDCA slot priorities list after shielding;
Reduction of speed module 503, for carrying out reduction of speed to the UE of access failure;
Second access module 504, if for after reduction of speed still with regard to access failure, after all UL, DL time slots are all obtained slot priorities list according to the sequence of SDCA time slot queuing strategy, access.
In enforcement, the first access module can also be further used for taking number of resources difference according to business, according to carrier wave priority and slot priorities sequence.
For convenience of description, each several part of the above device is divided into various module or unit to describe respectively with function.Certainly, the function of each module or unit can be realized in same or multiple software or hardware when implementing of the present invention.
From above-described embodiment, in the technical scheme that the embodiment of the present invention provides:
By using the public-measurement amount of UTRAN side, obtain the co-channel interference reference of Target cell.
By using the special measurement of UE, obtain the interference coordination neighboring BS information of current UE.
By basis, neighbor pilot difference thresholding, control adjacent area and participate in interference coordination algorithm.
Adjacent area potential interference intensity is revised by any path loss weighting scheme.
Further consider the special processing of cell-of-origin weighted value.
Adopt the selection etc. of two-wheeled carrier wave, time slot.
The technical scheme that the embodiment of the present invention provides can make the UE to be accessed in Target cell that the less resource of descending interference can be selected to use, thus avoid be subject to strong jamming or produce strong jamming, improve customer service quality.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.