CN102118870B - Method and device for dispatching terminal - Google Patents
Method and device for dispatching terminal Download PDFInfo
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- CN102118870B CN102118870B CN2011100086507A CN201110008650A CN102118870B CN 102118870 B CN102118870 B CN 102118870B CN 2011100086507 A CN2011100086507 A CN 2011100086507A CN 201110008650 A CN201110008650 A CN 201110008650A CN 102118870 B CN102118870 B CN 102118870B
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Abstract
The embodiment of the invention discloses a method and a device for dispatching a terminal, belongs to the technical field of wireless communication and solves the problem of how to control the reception interference level of a PDCCH (physical downlink control channel) in the cell. In the method for dispatching the terminal, a base station is used for acquiring interference level parameters of the PDCCH in an adjacent cell of the present cell and/or quality parameters of an air interface of a terminal in the present cell; and the terminal in the present cell is adjusted according to the obtained quality parameters of the air interface and/or the interference level parameters of the PDCCH. Through the adoption of the method and the device, the reception interference level of the PDCCH in the cell can be controlled.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of terminal scheduling method and apparatus.
Background technology
The downlink transfer of Long Term Evolution (LTE) system has adopted OFDM (OrthogonalFrequency Division Multiplexing, OFDM) technology, the problem of disturbing in residential quarter is resolved substantially, but presence of intercell interference (Inter-Cell Interference, ICI) may be even more serious than code division multiple access (Code DivisionMultiple Access, CDMA) system.
Physical Downlink Control Channel (PDCCH), as control channel, has carried the various control informations of base station (Evolved NodeB, eNB) up-downgoing dispatched users, and the quality that the user receives PDCCH has directly determined the throughput of user and network., if but ICI can not get rational control in the LTE network, the quality of reception of PDCCH will be had a strong impact on.
Stipulate in the 36.423R940 agreement of 3G (Third Generation) Moblie standardization body (3GPP), between eNB, by PDCCH interference level (the PDCCH Interference Impact) parameter between the mutual neighbor cell of X2 interface, the level that is disturbed of all neighbor cells is known in each residential quarter by this parameter.For example, residential quarter B sends to residential quarter A with the PDCCH Interference Impact parameter of this residential quarter, residential quarter A determines the interference level of the adjacent cell that residential quarter B is subject to according to this parameter, some levels of disturbing are larger, the OFDM symbolic number that can take by the PDCCH that reduces residential quarter A, reduce the interference level of residential quarter A to residential quarter B, some levels of disturbing are less, can suitably increase the OFDM symbolic number that the PDCCH of residential quarter A takies.
PDCCH Interference Impact parameter be described below table 1:
Table 1
In realizing process of the present invention, the inventor finds in prior art to exist following technical problem:
Existing protocol has provided the approach of collecting adjacent cell interference level parameter, but this residential quarter only relies on the information that PDCCH Interference Impact parameter is carried to control the interference level of this residential quarter PDCCH accurately.Because what PDCCH Interference Impact parameter was carried is the OFDM symbolic number information that adjacent cell PDCCH takies, the OFDM symbolic number that this residential quarter takies according to adjacent cell PDCCH, judge the interference level that this residential quarter produces adjacent cell, and can be in order to reduce the interference level of adjacent cell and reduce the OFDM symbolic number that the PDCCH of this residential quarter takies, but how this residential quarter controls the reception interference level of the PDCCH of self residential quarter, also there is no concrete implementation at present.
Summary of the invention
The embodiment of the present invention provides a kind of terminal scheduling method and apparatus, for the problem of the reception interference level that solves the PDCCH that how to control this residential quarter.
A kind of terminal scheduling method, the method comprises:
Base station obtains the physical downlink control channel PDCCH interference level parameter value of the adjacent cell of current area;
The dispatch terminal number of current area, according to getting PDCCH interference level parameter value, is adjusted in base station;
Terminal scheduling, according to the dispatch terminal number after adjusting, is carried out in current area in base station.
A kind of terminal scheduling equipment, this equipment comprises:
The interference level parameter acquiring unit, for the physical downlink control channel PDCCH interference level parameter value of the adjacent cell of obtaining current area;
Dispatch terminal number adjustment unit, be used for getting PDCCH interference level parameter value, adjusts the dispatch terminal number of current area;
The terminal scheduling unit, be used for carrying out terminal scheduling according to the dispatch terminal number after adjusting in current area.
In this programme, base station obtains the PDCCH interference level parameter value of the adjacent cell of current area,, according to getting PDCCH interference level parameter value, adjusts the dispatch terminal number of current area; And, according to the dispatch terminal number after adjusting, in current area, carry out terminal scheduling.As seen, in this programme, the reception interference level of the PDCCH of current area can be adjusted by adjusting the dispatch terminal number of current area in base station, has reached the large purpose of reception interference level of the PDCCH of this residential quarter control self residential quarter.
The embodiment of the present invention provides another kind of terminal scheduling method and apparatus, for the problem of the reception interference level that solves the PDCCH that how to control this residential quarter.
A kind of terminal scheduling method, the method comprises:
Terminal to be scheduled in the base station selection current area;
Base station obtains the mass parameter value of eating dishes without rice or wine of the terminal of choosing, and adjusts the physical downlink control channel PDCCH polymerization grade of this terminal according to the mass parameter value of eating dishes without rice or wine that gets;
Base station, according to the PDCCH polymerization grade of each terminal after adjusting, is this terminal distribution PDCCH resource, and to this terminal, sends and carry the dispatch of respective resources assignment information.
A kind of terminal scheduling equipment, this equipment comprises:
Terminal is chosen unit, is used for choosing current area terminal to be scheduled;
Polymerization level adjustment unit,, for the mass parameter value of eating dishes without rice or wine of obtaining the terminal of choosing, adjust the physical downlink control channel PDCCH polymerization grade of this terminal according to the mass parameter value of eating dishes without rice or wine that gets;
The terminal scheduling unit, be used for the PDCCH polymerization grade according to each terminal after adjusting, and is this terminal distribution PDCCH resource, and to this terminal, sends and carry the dispatch of respective resources assignment information.
In this programme, terminal to be scheduled in the base station selection current area; Obtain the mass parameter value of eating dishes without rice or wine of the terminal of choosing, adjust the PDCCH polymerization grade of this terminal according to the mass parameter value of eating dishes without rice or wine that gets; PDCCH polymerization grade according to each terminal after adjusting, be this terminal distribution PDCCH resource, and to this terminal, send and carry the dispatch of respective resources assignment information.As seen, in this programme, the reception interference level of the PDCCH of current area can be adjusted by adjusting the PDCCH polymerization grade of terminal in base station, has reached the large purpose of reception interference level of the PDCCH of this residential quarter control self residential quarter.
Description of drawings
The method flow schematic diagram that Fig. 1 provides for the embodiment of the present invention;
The other method schematic flow sheet that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the embodiment of the present invention;
The device structure schematic diagram that Fig. 4 provides for the embodiment of the present invention;
Another device structure schematic diagram that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Reception interference level for the PDCCH that controls this residential quarter, the embodiment of the present invention provides the terminal scheduling method, in this method, when arrived in dispatching cycle in base station, obtain the mass parameter of eating dishes without rice or wine of terminal in the PDCCH interference level parameter of adjacent cell of current area and/or current area; According to eat dishes without rice or wine mass parameter and/or the PDCCH interference level parameter that get, the terminal of scheduling current area.
Referring to Fig. 1, a kind of terminal scheduling method that the embodiment of the present invention provides specifically comprises the following steps:
Step 10: base station obtains the PDCCH interference level parameter value of the adjacent cell of current area;
Step 11: the dispatch terminal number of current area, according to getting PDCCH interference level parameter value, is adjusted in base station;
Step 12: terminal scheduling, according to the dispatch terminal number after adjusting, is carried out in current area in base station.
The specific implementation of step 11 can adopt following dual mode:
The first, if get the PDCCH interference level parameter value of an adjacent cell,, turn the dispatch terminal number of current area down during higher than predefined PDCCH interference level parameter higher limit at this PDCCH interference level parameter value base station; , the dispatch terminal number of current area is tuned up during lower than predefined PDCCH interference level parameter lower limit value at this PDCCH interference level parameter value;
The second, if get the PDCCH interference level parameter value of a plurality of adjacent cells, PDCCH interference level parameter value that will these a plurality of adjacent cells carries out match, obtain the comprehensive PDCCH interference level of adjacent cell parameter value, and at the comprehensive PDCCH interference level of this adjacent cell parameter value, during higher than described PDCCH interference level parameter higher limit, the dispatch terminal number of current area is turned down; , the dispatch terminal number of current area is tuned up during lower than described PDCCH interference level parameter lower limit value at the comprehensive PDCCH interference level of this adjacent cell parameter value.
Here, PDCCH interference level parameter higher limit and PDCCH interference level parameter lower limit value are the integer greater than 0, PDCCH interference level parameter higher limit can be greater than PDCCH interference level parameter lower limit value, more excellent, PDCCH interference level parameter higher limit can be 2, and PDCCH interference level parameter higher limit can be 1.
Better, before the dispatch terminal number with current area is turned down, whether at first base station can judge dispatching cycle (TTI) number greater than predefined tolerance window higher limit, described TTI number be base station before current TTI, determine total number of the TTI that the dispatch terminal number of current area need to be turned down; After judgement TTI number is greater than described tolerance window higher limit, turn the dispatch terminal number of current area down base station, otherwise, the dispatch terminal number of current area is not adjusted.
Better, before the dispatch terminal number with current area tuned up, at first base station can judge that whether the TTI number is greater than predefined tolerance lower window edge value; Described TTI number be base station before current TTI, determine total number of the TTI dispatch terminal number of current area need to be tuned up; Base station after judgement TTI number is greater than described tolerance lower window edge value, tunes up the dispatch terminal number of current area, otherwise, the dispatch terminal number of current area is not adjusted.
Here, tolerance window higher limit and tolerance lower window edge value are the integer greater than 0, tolerate that the window higher limit can be greater than tolerance lower window edge value, and more excellent, tolerance window higher limit and tolerance lower window edge value can be in (0,9) middle values.
Concrete, base station can be turned the dispatch terminal number of current area down according to following formula:
Wherein, Max_UE_Num_TTI is the dispatch terminal number after adjusting, Max_UE_Num_TTI
0For the dispatch terminal number before adjusting, w is greater than 0 and less than 1 adjustment coefficient; System_UE_Num_TTI is the terminal number of access current area.
Base station can tune up the dispatch terminal number of current area according to following formula:
Wherein, Max_UE_Num_TTI is the dispatch terminal number after adjusting, Max_UE_Num_TTI
0For the dispatch terminal number before adjusting, w be greater than 0 and less than 1 adjustment coefficient, System_UE_Num_TTI is for accessing the terminal number of current area.
Here, the initial value of dispatch terminal number is System_UE_Num_TTI.W specifically can get percentage.
Certainly; the method that the dispatch terminal number of current area is adjusted in base station is not limited to above-mentioned two formula; the scheme that any number of dispatch terminal with current area tunes up or turns down is all in protection scope of the present invention, and the dispatch terminal number after only needing to guarantee to adjust is not less than 0 and gets final product.
Base station can according to following formula will these a plurality of adjacent cells PDCCH interference level parameter value carry out match:
Wherein, PII
NeighborFor the comprehensive PDCCH interference level of the adjacent cell that obtains after match parameter value; k
iFor greater than 0 and less than 1 fitting coefficient, and
PII
iBe the PDCCH interference level parameter value of i adjacent cell, n is the sum of the adjacent cell of current area, and i is value in 1 to n.
Certainly, any other interference level of PDCCH with a plurality of adjacent cells parameter value carries out the scheme of match all in protection scope of the present invention.
The specific implementation of step 12 can be as follows:
Terminal to be scheduled in current area is chosen according to described dispatch terminal number in base station;
The PDCCH polymerization grade of this terminal, according to the mass parameter value of eating dishes without rice or wine of the terminal of choosing, is adjusted in base station;
Base station, according to the PDCCH polymerization grade of the terminal after adjusting, is this terminal distribution PDCCH resource, and to this terminal, sends and carry the dispatch of respective resources assignment information.
Concrete, when the described mass parameter value of eating dishes without rice or wine comprises Block Error Rate (BLER) value of Physical Downlink Shared Channel (PDSCH), if the BLER value of the terminal of choosing is higher than predefined BLER higher limit, the PDCCH polymerization grade of this terminal is heightened in base station; If the BLER value of the terminal of choosing is lower than predefined BLER lower limit, the PDCCH polymerization grade of this terminal is turned down in base station.
When the described mass parameter value of eating dishes without rice or wine comprises the BLER value of PDSCH and channel quality indication (CQI) value, if the BLER value of the terminal of choosing is higher than the indicated spectrum efficiency of the CQI value of predefined BLER higher limit and this terminal feedback lower than predefined spectrum efficiency lower limit, the PDCCH polymerization grade of this terminal is heightened in base station; If the BLER value of the terminal of choosing is lower than the indicated spectrum efficiency of the CQI value of predefined BLER lower limit and this terminal feedback higher than predefined spectrum efficiency higher limit, the PDCCH polymerization grade of this terminal is turned down in base station.
When the described mass parameter value of eating dishes without rice or wine comprises the CQI value, if the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing lower than predefined spectrum efficiency lower limit, the PDCCH polymerization grade of this terminal is heightened in base station; If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing is higher than predefined spectrum efficiency higher limit, the PDCCH polymerization grade of this terminal is turned down in base station.
Here, BLER higher limit and BLER lower limit are the numerical value greater than 0, less than 1, and the BLER higher limit can be greater than the BLER lower limit, and is more excellent, BLER higher limit and BLER lower limit can be in (1%, 10%) value.Spectrum efficiency lower limit and spectrum efficiency lower limit are the numerical value greater than 0, and the spectrum efficiency higher limit can be greater than the spectrum efficiency lower limit.
While in base station, the PDCCH polymerization grade of this terminal being turned down, PDCCH polymerization grade that specifically can terminal is current is turned down a step-length, for example the PDCCH polymerization grade 8 that terminal is current is adjusted to 4, the PDCCH polymerization class 4 that terminal is current is adjusted to 2, the PDCCH polymerization grade 2 that terminal is current is adjusted to 1, the PDCCH polymerization grade current in terminal is 1 o'clock, do not adjust.While in base station, the PDCCH polymerization grade of this terminal being heightened, PDCCH polymerization grade that specifically can terminal is current is heightened a step-length, for example the PDCCH polymerization grade 1 that terminal is current is adjusted to 2, the PDCCH polymerization grade 2 that terminal is current is adjusted to 4, the PDCCH polymerization class 4 that terminal is current is adjusted to 8, the PDCCH polymerization grade current in terminal is 8 o'clock, do not adjust, and do not dispatch this terminal.
Better, after the PDCCH polymerization grade of each terminal that the base station adjustment is chosen, base station can also be according to the PDCCH polymerization grade of each terminal after adjusting, determine the PDCCH interference level parameter value of current area, and the PDCCH interference level parameter value that will determine sends to the adjacent cell base station of current area.
Concrete, base station can be according to following formula, according to the PDCCH interference level parameter value of the PDCCH polymerization classification current area of each terminal after adjusting:
Wherein, PII
LocalFor the PDCCH interference level parameter value of definite current area, k
iFor greater than 0 and less than 1 fitting coefficient, and
CCE
ueiFor the PDCCH polymerization grade of i terminal after adjusting, m is the sum for the treatment of dispatch terminal of choosing, and i is value in 1 to m.
Certainly, any other scheme according to the PDCCH interference level parameter value of the PDCCH polymerization classification current area of each terminal after adjusting is all in protection scope of the present invention.
Referring to Fig. 2, the embodiment of the present invention provides another kind of terminal scheduling method, specifically comprises the following steps:
Step 20: terminal to be scheduled in the base station selection current area; Here, the terminal of access current area can be chosen as terminal to be scheduled in base station;
Step 21: base station obtains the mass parameter value of eating dishes without rice or wine of the terminal of choosing, and adjusts the PDCCH polymerization grade of this terminal according to the mass parameter value of eating dishes without rice or wine that gets;
Step 22: base station, according to the PDCCH polymerization grade of each terminal after adjusting, is this terminal distribution PDCCH resource, and to this terminal, sends and carry the dispatch of respective resources assignment information.
The specific implementation of step 21 can adopt following three kinds of modes:
The first, when the described mass parameter value of eating dishes without rice or wine comprises the block error rate BLER value of PDSCH, if the BLER value of the terminal of choosing higher than predefined BLER higher limit, the PDCCH polymerization grade of this terminal is heightened in base station; If the BLER value of the terminal of choosing is lower than predefined BLER lower limit, the PDCCH polymerization grade of this terminal is turned down in base station.
The second, when the described mass parameter value of eating dishes without rice or wine comprises the BLER value of PDSCH and CQI value, if the BLER value of the terminal of choosing is higher than the indicated spectrum efficiency of the CQI value of predefined BLER higher limit and this terminal feedback lower than predefined spectrum efficiency lower limit, the PDCCH polymerization grade of this terminal is heightened in base station; If the BLER value of the terminal of choosing is lower than the indicated spectrum efficiency of the CQI value of predefined BLER lower limit and this terminal feedback higher than predefined spectrum efficiency higher limit, the PDCCH polymerization grade of this terminal is turned down in base station.
The third, when the described mass parameter value of eating dishes without rice or wine comprises the CQI value, if the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing lower than predefined spectrum efficiency lower limit, the PDCCH polymerization grade of this terminal is heightened in base station; If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing is higher than predefined spectrum efficiency higher limit, the PDCCH polymerization grade of this terminal is turned down in base station.
Better, after the PDCCH polymerization grade of each terminal that the base station adjustment is chosen, base station can also be according to the PDCCH polymerization grade of each terminal after adjusting, determine the PDCCH interference level parameter value of current area, and the PDCCH interference level parameter value that will determine sends to the adjacent cell base station of current area.
Concrete, base station can be according to following formula, according to the PDCCH interference level parameter value of the PDCCH polymerization classification current area of each terminal after adjusting:
Wherein, PII
LocalFor the PDCCH interference level parameter value of definite current area, k
iFor greater than 0 and less than 1 fitting coefficient, and
CCE
ueiFor the PDCCH polymerization grade of i terminal after adjusting, m is the sum for the treatment of dispatch terminal of choosing, and i is value in 1 to m.
Below the present invention is specifically described:
The solution of the present invention is by monitoring the quality of eating dishes without rice or wine of this residential quarter, and, in conjunction with the PDCCHInterference Impact information that adjacent cell is fed back, carry out this community user interference level and control and the PDCCHInterference Impact of this residential quarter is fed back to adjacent cell.
The invention provides a kind of PDCCH channel with robustness in the LTE system and receive the interference level auto-adaptive control scheme, specific as follows:
After started each dispatching cycle, the PDCCH interference level of eat dishes without rice or wine quality and the adjacent cell of eNB synthetic user, dispatched the user.As shown in Figure 3, the media access control (MAC) of eNB layer is collected the PDCCH interference level parameter of adjacent cell and the mass parameter of eating dishes without rice or wine of each dispatch terminal, and the mass parameter of eating dishes without rice or wine of terminal generally comprises the BLER of PDSCH, the parameters such as CQI that UE reports; ENB, according to the information of collecting, selects schedulable terminal and can be the PDCCH resource of terminal distribution, and carries out resource and distribute; Send dispatch by eating dishes without rice or wine to the terminal of scheduling, and send PDCCH interference level (the PDCCH Interference Impact) parameter of this residential quarter to adjacent cell.
A kind of algorithm of determining the terminal number of dispatching and PDCCH symbolic number according to eat dishes without rice or wine mass parameter and PDCCH interference level parameter is as follows:
At first, the input parameter of this algorithm use is as follows:
System_UE_Num_TTI: the schedulable total number of terminals that has accessed of each TTI.
Max_UE_Num_TTI: the maximum number of terminals of each TTI scheduling; , according to the PDCCH interference level of adjacent cell, adjust the number of terminals of the maximum scheduling of this TTI.
W: the coefficient that terminal number reduces or increases is percentage.
UeNum_Down_Window: reduce the window threshold value that needs the terminal number of dispatching in TTI, unit is scheduling TTI.
UeNum_Up_Window: increase the window threshold value that needs the terminal number of dispatching in TTI, unit is scheduling TTI.
PII_Up_Threshold:, according to adjacent cell PDCCH Interference Impact parameter, raise the threshold value of terminal number.
PII_Down_Threshold:, according to adjacent cell PDCCH Interference Impact parameter, lower the threshold value of terminal number.
BLER_Up_Threshold: the threshold value that need to improve terminal PDCCH polymerization grade according to the quality of eating dishes without rice or wine.
BLER_Down_Threshold: the threshold value that need to reduce terminal PDCCH polymerization grade according to the quality of eating dishes without rice or wine.
EFF_Up_Threshold: the threshold value that need to reduce terminal PDCCH polymerization grade according to the quality of eating dishes without rice or wine.
EFF_down_Threshold: the threshold value that need to improve terminal PDCCH polymerization grade according to the quality of eating dishes without rice or wine.
Algorithm steps is as follows:
Step 1, obtain the match value of PDCCH Interference Impact (PII) parameter of all adjacent cells.
After the PII value that each adjacent cell reports is received in this residential quarter, pass through function f
pii(PII
1... .PII
n) carry out match, obtain the comprehensive PII value PII of all adjacent cells
Neighbor, PII wherein
iBe the PII value of i adjacent cell, i ∈ 1,2 ... n}, n are the sum of all adjacent cells of this residential quarter.
Wherein,
Above-mentioned formula is the match mode of a kind of weighted fitting wherein, can be by choosing different k values, the weight of the PII value of different adjacent cells is adjusted.
Step 2, according to the PDCCH Interference Impact parameter of adjacent cell, the number of terminals of this TTI scheduling is adjusted.
If PII
NeighborHigher than PII_Up_Threshold, and the TTI number is greater than tolerance window UeNum_Up_Window, and the UE number of this TTI scheduling will be reduced to:
If PII
NeighborLower than PII_Down_Threshold, and the TTI number is greater than tolerance window UeNum_Down_Window, and the UE number of this TTI scheduling will increase to:
Other all situations, do not change terminal number;
Step 3, according to the mass parameter of eating dishes without rice or wine of terminal, the PDCCH polymerization grade (CCE) of terminal is adjusted:
If the BLER value of terminal is higher than BLER_Up_Threshold, and the indicated spectrum efficiency of the CQI value of terminal feedback improves the polymerization grade of the PDCCH of terminal lower than EFF_down_Threshold;
If the BLER value of terminal is lower than BLER_Down_Threshold, and the indicated spectrum efficiency of the CQI value of terminal feedback reduces the polymerization grade of the PDCCH of terminal higher than EFF_Up_Threshold;
Other all situations, do not revise the PDCCH polymerization grade of terminal;
After the PDCCH of each terminal to be scheduled polymerization classification, the OFDM symbolic number that just can take according to the PDCCH of the PDCCH polymerization classification current area of each terminal to be scheduled.
Step 4, calculate the PII of this residential quarter, and circular is to all neighbor cells:
Note PII
LocalFor this residential quarter PDCCH interference level parameter,
PII
local＝f(CCE
ue1，CCE
ue2，.....CCE
uem)
By above-mentioned formula, the CCE number that takies according to each UE of this residential quarter calculates PII
Local, as the PDCCH Interference Impact parameter of circular to all adjacent cells.
Above-mentioned handling process is controlled in real time by eNB.
Referring to Fig. 4, the embodiment of the present invention also provides a kind of terminal scheduling equipment, and this equipment comprises:
Interference level parameter acquiring unit 40, for the physical downlink control channel PDCCH interference level parameter value of the adjacent cell of obtaining current area;
Dispatch terminal number adjustment unit 41, be used for getting PDCCH interference level parameter value, adjusts the dispatch terminal number of current area;
Terminal scheduling unit 42, be used for carrying out terminal scheduling according to the dispatch terminal number after adjusting in current area.
Described dispatch terminal number adjustment unit 41 is used for:
, if get the PDCCH interference level parameter value of an adjacent cell, at this PDCCH interference level parameter value, during higher than predefined PDCCH interference level parameter higher limit, the dispatch terminal number of current area is turned down; , the dispatch terminal number of current area is tuned up during lower than predefined PDCCH interference level parameter lower limit value at this PDCCH interference level parameter value; Perhaps,
If get the PDCCH interference level parameter value of a plurality of adjacent cells, PDCCH interference level parameter value that will these a plurality of adjacent cells carries out match, obtain the comprehensive PDCCH interference level of adjacent cell parameter value, and at the comprehensive PDCCH interference level of this adjacent cell parameter value, during higher than described PDCCH interference level parameter higher limit, the dispatch terminal number of current area is turned down; , the dispatch terminal number of current area is tuned up during lower than described PDCCH interference level parameter lower limit value at the comprehensive PDCCH interference level of this adjacent cell parameter value.
Described dispatch terminal number adjustment unit 41 also is used for:
Whether judge dispatching cycle TTI number greater than predefined tolerance window higher limit, described TTI number be base station before current TTI, determine total number of the TTI that the dispatch terminal number of current area need to be turned down; When being judged as YES, the dispatch terminal number of current area is turned down.
Described dispatch terminal number adjustment unit 41 also is used for:
Judge that whether the TTI number is greater than predefined tolerance lower window edge value; Described TTI number be base station before current TTI, determine total number of the TTI dispatch terminal number of current area need to be tuned up; When being judged as YES, the dispatch terminal number of current area is tuned up.
Described dispatch terminal number adjustment unit 41 is used for: according to following formula, the dispatch terminal number of current area is turned down:
Wherein, Max_UE_Num_TTI is the dispatch terminal number after adjusting, Max_UE_Num_TTI
0For the dispatch terminal number before adjusting, w is greater than 0 and less than 1 adjustment coefficient; System_UE_Num_TTI is the terminal number of access current area.
Described dispatch terminal number adjustment unit 41 is used for: according to following formula, the dispatch terminal number of current area is tuned up:
Wherein, Max_UE_Num_TTI is the dispatch terminal number after adjusting, Max_UE_Num_TTI
0For the dispatch terminal number before adjusting, w be greater than 0 and less than 1 adjustment coefficient, System_UE_Num_TTI is for accessing the terminal number of current area.
Described dispatch terminal number adjustment unit 41 is used for: PDCCH interference level parameter value that will these a plurality of adjacent cells according to following formula carries out match:
Wherein, PII
NeighborFor the comprehensive PDCCH interference level of the adjacent cell that obtains after match parameter value; k
iFor greater than 0 and less than 1 fitting coefficient, and
PII
iBe the PDCCH interference level parameter value of i adjacent cell, n is the sum of the adjacent cell of current area, and i is value in 1 to n.
Described terminal scheduling unit 42 is used for:
Choose terminal to be scheduled in current area according to described dispatch terminal number;
, according to the mass parameter value of eating dishes without rice or wine of the terminal of choosing, adjust the PDCCH polymerization grade of this terminal;
PDCCH polymerization grade according to the terminal after adjusting, be this terminal distribution PDCCH resource, and to this terminal, send and carry the dispatch of respective resources assignment information.
Described terminal scheduling unit 42 is used for:
If the BLER value of the terminal of choosing, higher than predefined BLER higher limit, is heightened the PDCCH polymerization grade of this terminal;
If the BLER value of the terminal of choosing, lower than predefined BLER lower limit, is turned down the PDCCH polymerization grade of this terminal.
Described terminal scheduling unit 42 is used for:
If the BLER value of the terminal of choosing, is heightened the PDCCH polymerization grade of this terminal lower than predefined spectrum efficiency lower limit higher than the indicated spectrum efficiency of the CQI value of predefined BLER higher limit and this terminal feedback;
If the BLER value of the terminal of choosing, is turned down the PDCCH polymerization grade of this terminal higher than predefined spectrum efficiency higher limit lower than the indicated spectrum efficiency of the CQI value of predefined BLER lower limit and this terminal feedback.
Described terminal scheduling unit 42 is used for:
If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing, lower than predefined spectrum efficiency lower limit, is heightened the PDCCH polymerization grade of this terminal;
If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing, higher than predefined spectrum efficiency higher limit, is turned down the PDCCH polymerization grade of this terminal.
This equipment also comprises:
Interference level parameter transmitting element 43, be used for the PDCCH polymerization grade in each terminal according to after adjusting, and determine the PDCCH interference level parameter value of current area, and the PDCCH interference level parameter value that will determine sends to the adjacent cell base station of current area.
Described interference level parameter transmitting element 43 is used for:
According to following formula, according to the PDCCH interference level parameter value of the PDCCH polymerization classification current area of each terminal after adjusting:
Wherein, PII
LocalFor the PDCCH interference level parameter value of definite current area, k
iFor greater than 0 and less than 1 fitting coefficient, and
CCE
ueiFor the PDCCH polymerization grade of i terminal after adjusting, m is the sum for the treatment of dispatch terminal of choosing, and i is value in 1 to m.
Referring to Fig. 5, the embodiment of the present invention also provides a kind of terminal scheduling equipment, and this equipment comprises:
Terminal is chosen unit 50, is used for choosing current area terminal to be scheduled;
Polymerization level adjustment unit 51,, for the mass parameter value of eating dishes without rice or wine of obtaining the terminal of choosing, adjust the physical downlink control channel PDCCH polymerization grade of this terminal according to the mass parameter value of eating dishes without rice or wine that gets;
Terminal scheduling unit 52, be used for the PDCCH polymerization grade according to each terminal after adjusting, and is this terminal distribution PDCCH resource, and to this terminal, sends and carry the dispatch of respective resources assignment information.
Described polymerization level adjustment unit 51 is used for:
When the described mass parameter value of eating dishes without rice or wine comprises the block error rate BLER value of Physical Downlink Shared Channel PDSCH, if the BLER value of the terminal of choosing, higher than predefined BLER higher limit, is heightened the PDCCH polymerization grade of this terminal; If the BLER value of the terminal of choosing, lower than predefined BLER lower limit, is turned down the PDCCH polymerization grade of this terminal.
Described polymerization level adjustment unit 51 is used for:
When the described mass parameter value of eating dishes without rice or wine comprises the BLER value of PDSCH and channel quality indicator (CQI) value, if the BLER value of the terminal of choosing, is heightened the PDCCH polymerization grade of this terminal lower than predefined spectrum efficiency lower limit higher than the indicated spectrum efficiency of the CQI value of predefined BLER higher limit and this terminal feedback; If the BLER value of the terminal of choosing, is turned down the PDCCH polymerization grade of this terminal higher than predefined spectrum efficiency higher limit lower than the indicated spectrum efficiency of the CQI value of predefined BLER lower limit and this terminal feedback.
Described polymerization level adjustment unit 51 is used for:
When the described mass parameter value of eating dishes without rice or wine comprises the CQI value, if the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing is heightened the PDCCH polymerization grade of this terminal lower than predefined spectrum efficiency lower limit; If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing, higher than predefined spectrum efficiency higher limit, is turned down the PDCCH polymerization grade of this terminal.
This equipment also comprises:
Interference level parameter transmitting element 53, be used for the PDCCH polymerization grade in each terminal according to after adjusting, and determine the PDCCH interference level parameter value of current area, and the PDCCH interference level parameter value that will determine sends to the adjacent cell base station of current area.
Described interference level parameter transmitting element 53 is used for:
According to following formula, according to the PDCCH interference level parameter value of the PDCCH polymerization classification current area of each terminal after adjusting:
Wherein, PII
LocalFor the PDCCH interference level parameter value of definite current area, k
iFor greater than 0 and less than 1 fitting coefficient, and
CCE
ueiFor the PDCCH polymerization grade of i terminal after adjusting, m is the sum for the treatment of dispatch terminal of choosing, and i is value in 1 to m.
The terminal scheduling equipment that the embodiment of the present invention provides can be specifically base station.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the present invention provides, base station obtains the PDCCH interference level parameter value of the adjacent cell of current area,, according to getting PDCCH interference level parameter value, adjusts the dispatch terminal number of current area; And, according to the dispatch terminal number after adjusting, in current area, carry out terminal scheduling.As seen, in this programme, the reception interference level of the PDCCH of current area can be adjusted by adjusting the dispatch terminal number of current area in base station, has reached the large purpose of reception interference level of the PDCCH of this residential quarter control self residential quarter.
In the scheme that the embodiment of the present invention provides, terminal to be scheduled in the base station selection current area; Obtain the mass parameter value of eating dishes without rice or wine of the terminal of choosing, adjust the PDCCH polymerization grade of this terminal according to the mass parameter value of eating dishes without rice or wine that gets; PDCCH polymerization grade according to each terminal after adjusting, be this terminal distribution PDCCH resource, and to this terminal, send and carry the dispatch of respective resources assignment information.As seen, in this programme, the reception interference level of the PDCCH of current area can be adjusted by adjusting the PDCCH polymerization grade of terminal in base station, has reached the large purpose of reception interference level of the PDCCH of this residential quarter control self residential quarter.
The present invention describes with reference to flow chart and/or the block diagram of method, equipment (system) and computer program according to the embodiment of the present invention.Should understand can be by 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 the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of realizing in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step to produce computer implemented processing, thereby be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction of carrying out on computer or other programmable devices.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (22)
1. a terminal scheduling method, is characterized in that, the method comprises:
Base station obtains the physical downlink control channel PDCCH interference level parameter value of the adjacent cell of current area;
The dispatch terminal number of current area, according to getting PDCCH interference level parameter value, is adjusted in base station;
Terminal to be scheduled in current area is chosen according to described dispatch terminal number in base station, the mass parameter value of eating dishes without rice or wine according to the terminal of choosing, adjust the PDCCH polymerization grade of this terminal, PDCCH polymerization grade according to the terminal after adjusting, for this terminal distribution PDCCH resource, and to this terminal, send and carry the dispatch of respective resources assignment information.
2. the method for claim 1, is characterized in that, described base station is according to the PDCCH interference level parameter value that gets, and the dispatch terminal number of adjusting current area comprises:
If get the PDCCH interference level parameter value of an adjacent cell,, turn the dispatch terminal number of current area down during higher than predefined PDCCH interference level parameter higher limit at this PDCCH interference level parameter value base station; , the dispatch terminal number of current area is tuned up during lower than predefined PDCCH interference level parameter lower limit value at this PDCCH interference level parameter value; Perhaps,
If get the PDCCH interference level parameter value of a plurality of adjacent cells, PDCCH interference level parameter value that will these a plurality of adjacent cells carries out match, obtain the comprehensive PDCCH interference level of adjacent cell parameter value, and at the comprehensive PDCCH interference level of this adjacent cell parameter value, during higher than described PDCCH interference level parameter higher limit, the dispatch terminal number of current area is turned down; , the dispatch terminal number of current area is tuned up during lower than described PDCCH interference level parameter lower limit value at the comprehensive PDCCH interference level of this adjacent cell parameter value.
3. method as claimed in claim 2, is characterized in that, before the dispatch terminal number with current area was turned down, the method further comprised:
Whether base station judges dispatching cycle TTI number greater than predefined tolerance window higher limit, described TTI number be base station before current TTI, determine total number of the TTI that the dispatch terminal number of current area need to be turned down;
The described number of dispatch terminal with current area is turned down and is comprised:
After judgement TTI number is greater than described tolerance window higher limit, turn the dispatch terminal number of current area down base station.
4. method as claimed in claim 2, is characterized in that, before the dispatch terminal number with current area tuned up, the method further comprised:
Base station judges that whether the TTI number is greater than predefined tolerance lower window edge value; Described TTI number be base station before current TTI, determine total number of the TTI dispatch terminal number of current area need to be tuned up;
The described number of dispatch terminal with current area tunes up and comprises:
Base station after judgement TTI number is greater than described tolerance lower window edge value, tunes up the dispatch terminal number of current area.
5. method as claimed in claim 2, is characterized in that, turn the dispatch terminal number of current area down according to following formula base station:
Wherein, Max_UE_Num_TTI is the dispatch terminal number after adjusting, Max_UE_Num_TTI
0For the dispatch terminal number before adjusting, w is greater than 0 and less than 1 adjustment coefficient; System_UE_Num_TTI is the terminal number of access current area.
6. method as claimed in claim 2, is characterized in that, base station tunes up the dispatch terminal number of current area according to following formula:
Wherein, Max_UE_Num_TTI is the dispatch terminal number after adjusting, Max_UE_Num_TTI
0For the dispatch terminal number before adjusting, w be greater than 0 and less than 1 adjustment coefficient, System_UE_Num_TTI is for accessing the terminal number of current area.
7. the method for claim 1, it is characterized in that, when the described mass parameter value of eating dishes without rice or wine comprised the block error rate BLER value of Physical Downlink Shared Channel PDSCH, described base station was according to the mass parameter value of eating dishes without rice or wine of the terminal of choosing, and the PDCCH polymerization grade of adjusting this terminal comprises:
If the BLER value of the terminal of choosing is higher than predefined BLER higher limit, the PDCCH polymerization grade of this terminal is heightened in base station;
If the BLER value of the terminal of choosing is lower than predefined BLER lower limit, the PDCCH polymerization grade of this terminal is turned down in base station.
8. the method for claim 1, it is characterized in that, when the described mass parameter value of eating dishes without rice or wine comprised the BLER value of PDSCH and channel quality indicator (CQI) value, described base station was according to the mass parameter value of eating dishes without rice or wine of the terminal of choosing, and the PDCCH polymerization grade of adjusting this terminal comprises:
If the BLER value of the terminal of choosing is higher than the indicated spectrum efficiency of the CQI value of predefined BLER higher limit and this terminal feedback lower than predefined spectrum efficiency lower limit, the PDCCH polymerization grade of this terminal is heightened in base station;
If the BLER value of the terminal of choosing is lower than the indicated spectrum efficiency of the CQI value of predefined BLER lower limit and this terminal feedback higher than predefined spectrum efficiency higher limit, the PDCCH polymerization grade of this terminal is turned down in base station.
9. the method for claim 1, is characterized in that, when the described mass parameter value of eating dishes without rice or wine comprised the CQI value, described base station was according to the mass parameter value of eating dishes without rice or wine of the terminal of choosing, and the PDCCH polymerization grade of adjusting this terminal comprises:
If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing is lower than predefined spectrum efficiency lower limit, the PDCCH polymerization grade of this terminal is heightened in base station;
If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing is higher than predefined spectrum efficiency higher limit, the PDCCH polymerization grade of this terminal is turned down in base station.
10. the method for claim 1, is characterized in that, after the PDCCH polymerization grade of each terminal that the base station adjustment is chosen, the method further comprises:
Base station, according to the PDCCH polymerization grade of each terminal after adjusting, determine the PDCCH interference level parameter value of current area, and the PDCCH interference level parameter value that will determine sends to the adjacent cell base station of current area.
11. method as claimed in claim 10, is characterized in that, base station is according to following formula, according to the PDCCH interference level parameter value of the PDCCH polymerization classification current area of each terminal after adjusting:
Wherein, PII
LocalFor the PDCCH interference level parameter value of definite current area, k
iFor greater than 0 and less than 1 fitting coefficient, and
CCE
ueiFor the PDCCH polymerization grade of i terminal after adjusting, m is the sum for the treatment of dispatch terminal of choosing, and i is value in 1 to m.
12. a terminal scheduling equipment, is characterized in that, this equipment comprises:
The interference level parameter acquiring unit, for the physical downlink control channel PDCCH interference level parameter value of the adjacent cell of obtaining current area;
Dispatch terminal number adjustment unit, be used for getting PDCCH interference level parameter value, adjusts the dispatch terminal number of current area;
The terminal scheduling unit, be used for choosing current area terminal to be scheduled according to described dispatch terminal number; , according to the mass parameter value of eating dishes without rice or wine of the terminal of choosing, adjust the PDCCH polymerization grade of this terminal; PDCCH polymerization grade according to the terminal after adjusting, be this terminal distribution PDCCH resource, and to this terminal, send and carry the dispatch of respective resources assignment information.
13. equipment as claimed in claim 12, is characterized in that, described dispatch terminal number adjustment unit specifically is used for:
, if get the PDCCH interference level parameter value of an adjacent cell, at this PDCCH interference level parameter value, during higher than predefined PDCCH interference level parameter higher limit, the dispatch terminal number of current area is turned down; , the dispatch terminal number of current area is tuned up during lower than predefined PDCCH interference level parameter lower limit value at this PDCCH interference level parameter value; Perhaps,
If get the PDCCH interference level parameter value of a plurality of adjacent cells, PDCCH interference level parameter value that will these a plurality of adjacent cells carries out match, obtain the comprehensive PDCCH interference level of adjacent cell parameter value, and at the comprehensive PDCCH interference level of this adjacent cell parameter value, during higher than described PDCCH interference level parameter higher limit, the dispatch terminal number of current area is turned down; , the dispatch terminal number of current area is tuned up during lower than described PDCCH interference level parameter lower limit value at the comprehensive PDCCH interference level of this adjacent cell parameter value.
14. equipment as claimed in claim 13, is characterized in that, described dispatch terminal number adjustment unit also is used for:
Whether judge dispatching cycle TTI number greater than predefined tolerance window higher limit, described TTI number be base station before current TTI, determine total number of the TTI that the dispatch terminal number of current area need to be turned down; When being judged as YES, the dispatch terminal number of current area is turned down.
15. equipment as claimed in claim 13, is characterized in that, described dispatch terminal number adjustment unit also is used for:
Judge that whether the TTI number is greater than predefined tolerance lower window edge value; Described TTI number be base station before current TTI, determine total number of the TTI dispatch terminal number of current area need to be tuned up; When being judged as YES, the dispatch terminal number of current area is tuned up.
16. equipment as claimed in claim 13, is characterized in that, described dispatch terminal number adjustment unit specifically is used for:
According to following formula, the dispatch terminal number of current area is turned down:
Wherein, Max_UE_Num_TTI is the dispatch terminal number after adjusting, Max_UE_Num_TTI
0For the dispatch terminal number before adjusting, w is greater than 0 and less than 1 adjustment coefficient; System_UE_Num_TTI is the terminal number of access current area.
17. equipment as claimed in claim 13, is characterized in that, described dispatch terminal number adjustment unit specifically is used for:
According to following formula, the dispatch terminal number of current area is tuned up:
Wherein, Max_UE_Num_TTI is the dispatch terminal number after adjusting, Max_UE_Num_TTI
0For the dispatch terminal number before adjusting, w be greater than 0 and less than 1 adjustment coefficient, System_UE_Num_TTI is for accessing the terminal number of current area.
18. equipment as claimed in claim 12, is characterized in that, described terminal scheduling unit specifically is used for:
If the BLER value of the terminal of choosing, higher than predefined BLER higher limit, is heightened the PDCCH polymerization grade of this terminal;
If the BLER value of the terminal of choosing, lower than predefined BLER lower limit, is turned down the PDCCH polymerization grade of this terminal.
19. equipment as claimed in claim 12, is characterized in that, described terminal scheduling unit specifically is used for:
If the BLER value of the terminal of choosing, is heightened the PDCCH polymerization grade of this terminal lower than predefined spectrum efficiency lower limit higher than the indicated spectrum efficiency of the CQI value of predefined BLER higher limit and this terminal feedback;
If the BLER value of the terminal of choosing, is turned down the PDCCH polymerization grade of this terminal higher than predefined spectrum efficiency higher limit lower than the indicated spectrum efficiency of the CQI value of predefined BLER lower limit and this terminal feedback.
20. equipment as claimed in claim 12, is characterized in that, described terminal scheduling unit specifically is used for:
If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing, lower than predefined spectrum efficiency lower limit, is heightened the PDCCH polymerization grade of this terminal;
If the indicated spectrum efficiency of the CQI value of the terminal feedback of choosing, higher than predefined spectrum efficiency higher limit, is turned down the PDCCH polymerization grade of this terminal.
21. equipment as claimed in claim 12, is characterized in that, this equipment also comprises:
Interference level parameter transmitting element, be used for the PDCCH polymerization grade in each terminal according to after adjusting, and determine the PDCCH interference level parameter value of current area, and the PDCCH interference level parameter value that will determine sends to the adjacent cell base station of current area.
22. equipment as claimed in claim 21, is characterized in that, described interference level parameter transmitting element specifically is used for:
According to following formula, according to the PDCCH interference level parameter value of the PDCCH polymerization classification current area of each terminal after adjusting:
Wherein, PII
LocalFor the PDCCH interference level parameter value of definite current area, k
iFor greater than 0 and less than 1 fitting coefficient, and
CCE
ueiFor the PDCCH polymerization grade of i terminal after adjusting, m is the sum for the treatment of dispatch terminal of choosing, and i is value in 1 to m.
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| CN103096333B (en) * | 2011-11-08 | 2015-09-09 | 华为技术有限公司 | The coordination approach of Physical Downlink Control Channel interference and base station |
| CN102412950A (en) * | 2011-11-15 | 2012-04-11 | 中兴通讯股份有限公司 | Coordination system of power of downlink control channel and method thereof |
| CN103313401B (en) * | 2012-03-14 | 2016-03-02 | 普天信息技术研究院有限公司 | A kind of method and device adjusting PDCCH form |
| CN104486769B (en) * | 2014-12-03 | 2018-04-10 | 中国联合网络通信集团有限公司 | A kind of choosing method and device for being worth cell |
| CN105050193B (en) * | 2015-07-20 | 2019-02-01 | 华为技术有限公司 | A kind of signal sends, demodulation method and equipment and system |
| CN113286320B (en) * | 2020-02-19 | 2022-04-12 | 大唐移动通信设备有限公司 | Method and device for adjusting CCE aggregation level of control channel unit |
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