CN101815300B - Cell frequency assignment method and device in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system - Google Patents
Cell frequency assignment method and device in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system Download PDFInfo
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Abstract
The invention discloses cell frequency assignment method and device in a TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) system. The method comprises the following steps of: determining main frequency points of each cell, wherein the main frequency points of all the cells under the same base station are different, and the interference of all the cells at the main frequency points is smaller than that at other frequency points; and assigning frequency groups corresponding to the main frequency points to the cells according to the determined main frequency points of the cells. The invention can be used for solving the frequency planning problem of the traditional TD-SCDMA system, reducing the main frequency interference of the cells in the TD-SCDMA system and avoiding the cells opposite to a section direction from having the condition of the same main frequency. Relative to a pilot frequency networking mode, the invention can improve the frequency spectrum utilization rate; and relative to a common frequency networking mode, the invention can reduce the interference among dominant frequencies.
Description
Technical field
The present invention relates to moving communicating field, cell frequency distribution method and device in the particularly a kind of TD-SCDMA system.
Background technology
TD-SCDMA (Time Division Synchronous CDMA, the time-division synchronously-code division multiple access inserts; CDMA:Code Division Multiple Access; The code division multiple access access) frequency planning of system all adopts N frequency scheme; Be every sector configuration N carrier wave, comprising a main carrier frequency, a N-1 assistant carrier frequency, CCCH all is configured on the main carrier frequency.The bandwidth that each carrier frequency of TD-SCDMA system takies is 1.6MHz, therefore for 5M, 10M, 15M bandwidth, supports 3,6,9 carrier frequency respectively, and the TD-SCDMA frequency planning generally adopts identical networking or inter-frequency networking mode at present.
Identical networking is meant: the carrier frequency configuration of all sub-districts is the same, and for example every sub-district all disposes F1, F2, F3, and just the main carrier frequency of each sub-district need be redistributed;
Inter-frequency networking is meant: adopt channel multiplexing, have 1 * 3,3 * 3 with several kinds of modes such as dynamic assignment, it is multiplexing that 1 * 3 multiplexing i.e. 3 frequencies are that a class frequency is carried out, the user only need choose the frequency of planning, algorithm divides into groups automatically.
In the prior art, the identical networking availability of frequency spectrum is high, but its deficiency is: adjacent sub-district is bigger with disturbing frequently; And inter-frequency networking can effectively reduce adjacent sub-district with the influence of disturbing frequently, and improve systematic function, but its deficiency is: the availability of frequency spectrum is lower, needs more frequency resources.
Summary of the invention
The invention provides a kind of TD SDMA and insert cell frequency distribution method and device in the TD-SCDMA system, the identical networking neighbour disturbs the problem big, that the inter-frequency networking availability of frequency spectrum is lower with frequency in the sub-district in the prior art in order to solve.
Provide a kind of TD SDMA to insert the cell frequency distribution method in the TD-SCDMA system in the embodiment of the invention, comprised the steps:
For confirming the dominant frequency point in each sub-district, wherein, suffered interference is put less than in the suffered interference of other frequency in dominant frequency in dominant frequency point different and each sub-district in each sub-district under the same base station;
Dominant frequency point according to each sub-district is confirmed is the corresponding group of frequencies of each cell allocation dominant frequency point.
Preferable, saidly confirm the dominant frequency point for each sub-district, comprising:
To each sub-district, if in the interfered cell of this sub-district the frequency that did not occur is arranged, the frequency that then will not occur is confirmed as the dominant frequency point of this sub-district; If all frequencies have appearred in the interfered cell of this sub-district, then that interference level is minimum frequency is confirmed as the dominant frequency point of this sub-district.
Preferable, said for confirming the dominant frequency point in each sub-district, the dominant frequency point based on each sub-district is confirmed is the corresponding group of frequencies of each cell allocation dominant frequency point, comprising:
Calculate each sub-district in the suffered interference level sum of each frequency;
By in the suffered interference level sum of each frequency order from big to small, select a sub-district to confirm the dominant frequency point successively, and distribute the corresponding group of frequencies of dominant frequency point.
Preferable, by in the suffered interference level sum of each frequency order from big to small, select a sub-district to confirm the dominant frequency point successively, and distribute the corresponding group of frequencies of dominant frequency point, comprising:
To needing the sub-district of dividing frequency,, select a sub-district to carry out following steps successively by adjacent sub-district number order from big to small:
To all sub-districts under the base station under this sub-district,, carry out Frequency Distribution by in the suffered interference level sum of each frequency order from big to small; After having assigned; Confirm the affiliated base station, adjacent area of all unallocated frequencies in sub-district under the affiliated base station, this sub-district; To all sub-districts under the base station under the said adjacent area; Calculate and be updated in the suffered interference level sum of each frequency,, carry out Frequency Distribution by in the suffered interference level sum of each frequency order from big to small.
Preferable, said calculating also is updated in the suffered interference level sum of each frequency, comprising:
To all sub-districts under the base station under the said adjacent area; After the Frequency Distribution completion is carried out in sub-district of every selection; Except that with the sub-district of selecting with the sub-district under the base station, to other sub-district of unallocated frequency under the base station under the said adjacent area, all be updated in the suffered interference level sum of each frequency.
Preferable, said to all sub-districts under the base station under the said adjacent area, by in the suffered interference level sum of each frequency order from big to small, when carrying out Frequency Distribution, preferentially select and the preceding sub-district that once is assigned with the sub-district of frequency with the base station.
Preferable, calculate interference level by following formula:
P＝PGt+G1+G2-LS-Ln-ACIR；
Wherein: P is an interference level; PGt is the PCCPCH channel emission power of interfered cell configuration; G1 is the transmitting gain on the reference point line direction of interfered cell when interfered cell antenna position and Serving cell calculating interference; G2 is the receiving gain of interfered cell on Serving cell antenna position and interfered cell antenna position line direction; LS is the path loss values on the reference point of interfered cell when Serving cell calculates interference; Ln is the sector loss under the interfered cell; ACIR is the adjacent-channel interference ratio.
A kind of device of the medium and small allocating frequency of TD-SCDMA system that is also is provided in the embodiment of the invention, has comprised:
Determination module is used to each sub-district and confirms the dominant frequency point, and wherein, suffered interference is put less than in the suffered interference of other frequency in dominant frequency in dominant frequency point different and each sub-district in each sub-district under the same base station;
Distribution module is used for the dominant frequency point definite according to each sub-district, is the corresponding group of frequencies of each cell allocation dominant frequency point.
Preferable, said determination module comprises:
First confirms the unit, is used for each sub-district, confirms that there is the frequency that did not occur this area interference sub-district or all frequencies occurred;
Second confirms the unit, is used for when said first confirms that the unit confirms that the interfered cell of this sub-district has the frequency that did not occur, the frequency that did not occur being confirmed as the dominant frequency point of this sub-district; When said first confirmed that the unit confirms that all frequencies have appearred in the interfered cell of this sub-district, the frequency that interference level is minimum was confirmed as the dominant frequency point of this sub-district.
Preferable, also comprise:
First computing module is used to calculate each sub-district in the suffered interference level sum of each frequency;
Said determination module is further used for successively the dominant frequency point being confirmed in each sub-district by in the suffered interference level sum of each frequency order from big to small;
Said distribution module is further used for after dominant frequency point is confirmed in sub-district of the every selection of said determination module, is the corresponding group of frequencies of selecting of cell allocation dominant frequency point.
Preferable, said determination module is further used for:
To needing the sub-district of dividing frequency,, successively following steps are carried out in each sub-district by adjacent sub-district number order from big to small:
To all sub-districts under the base station under this sub-district,, confirm the dominant frequency point by in the suffered interference level sum of each frequency order from big to small;
After all cell allocation group of frequencies are accomplished under the base station under said distribution module is this sub-district; Confirm the affiliated base station, adjacent area of all unallocated frequencies in sub-district under the affiliated base station, this sub-district; To all sub-districts under the base station under the said adjacent area; Calculate and be updated in the suffered interference level sum of each frequency,, confirm the dominant frequency point by in the suffered interference level sum of each frequency order from big to small.
Preferable, said determination module is further used for:
To all sub-districts under the base station under the said adjacent area; In said distribution module is after group of frequencies distribution completion is carried out in a sub-district at every turn; Except that with this sub-district with the sub-district under the base station; To other sub-district of unallocated frequency under the base station under the said adjacent area, all be updated in the suffered interference level sum of each frequency.
Preferable, said determination module is further used for:
The preferential selection confirmed the dominant frequency point with preceding once by the sub-district of the sub-district of said module assigns frequency with the base station.
Preferable, also comprise:
Second computing module is used for calculating interference level by following formula:
P＝PGt+G?1+G2-LS-Ln-ACIR；
Wherein: P is an interference level; PGt is the PCCPCH channel emission power of interfered cell configuration; G1 is the transmitting gain on the reference point line direction of interfered cell when interfered cell antenna position and Serving cell calculating interference; G2 is the receiving gain of interfered cell on Serving cell antenna position and interfered cell antenna position line direction; LS is the path loss values on the reference point of interfered cell when Serving cell calculates interference; Ln is the sector loss under the interfered cell; ACIR is the adjacent-channel interference ratio.
Embodiment of the invention beneficial effect is following:
In the embodiment of the invention, when carrying out Frequency Distribution for the sub-district in the TD-SCDMA system, for confirming the dominant frequency point in each sub-district, wherein, suffered interference is put less than in the suffered interference of other frequency in dominant frequency in each sub-district dominant frequency point difference and each sub-district under the same base station; Dominant frequency point according to each sub-district is confirmed is the corresponding group of frequencies of each cell allocation dominant frequency point, can solve the frequency planning problem of existing TD-SCDMA system; Reducing the dominant frequency of each minizone in the TD-SCDMA system disturbs; Avoid the relative sub-district of sector directions situation to occur,, can improve the availability of frequency spectrum with respect to the inter-frequency networking mode with dominant frequency; With respect to the identical networking mode, can reduce between dominant frequency and disturb.
Description of drawings
Fig. 1 is the sketch map of embodiment of the invention medium frequency packet interface;
Fig. 2 is the sketch map of embodiment of the invention medium frequency allocation order;
Fig. 3 is to be the flow chart of an instantiation of the medium and small allocating frequency of TD-SCDMA system in the embodiment of the invention;
Fig. 4 is that interference level calculates sketch map in the embodiment of the invention;
Fig. 5 is the apparatus structure sketch map of the medium and small allocating frequency of TD-SCDMA system in the embodiment of the invention.
Embodiment
The embodiment of the invention provides cell frequency distribution method and the device in a kind of TD-SCDMA system; The user can oneself customize each frequency and divide into groups; Each group of frequencies is distinguished according to main carrier; And when being each group of frequencies of each cell allocation, consider that the main carrier frequency of each cell allocation disturbs minimum principle, can avoid relative sub-district the situation of identical dominant frequency point to occur effectively.The cell frequency distribution method of the embodiment of the invention and device have improved the availability of frequency spectrum with respect to the inter-frequency networking mode, and have reduced between dominant frequency with respect to the identical networking mode and to have disturbed.
Cell frequency distribution method in the TD-SCDMA system of the embodiment of the invention can comprise:
For confirming the dominant frequency point in each sub-district, wherein, suffered interference is put less than in the suffered interference of other frequency in dominant frequency in dominant frequency point different and each sub-district in each sub-district under the same base station;
Dominant frequency point according to each sub-district is confirmed is the corresponding group of frequencies of each cell allocation dominant frequency point.
In the enforcement; The user can oneself customize each frequency and divide into groups, and each group of frequencies is distinguished according to main carrier, and Fig. 1 is the sketch map of frequency packet interface; As shown in the figure; Frequency packet interface in should example has been shown among the figure, can have seen, satisfy following condition when frequency is divided into groups being provided with in this example: the main carrier setting of every class frequency does not have repetition; Each carrier wave setting in same group does not have repetition.
Fig. 2 is the sketch map of Frequency Distribution order; As shown in the figure; When carrying out TD-SCDMA system cell Frequency Distribution, can carry out in proper order by the Frequency Distribution shown in the figure, as shown in the figure; Distribute the allocation order of each base station frequencies of numeral such as " 1 " among the figure, " 2 " from inside to outside successively one by one in layer.
When carrying out Frequency Distribution, need meet following principle:
1, each the sub-district dominant frequency point under the same base station is different;
2, suffered interference is put less than in the suffered interference of other frequency in dominant frequency in each sub-district, avoids occurring with the relative situation in dominant frequency sub-district as far as possible;
3, the dominant frequency point of confirming based on each sub-district gives cell allocation dominant frequency point corresponding group of frequencies.
Wherein, when calculating interference, need to consider: the sub-district of having only the execution overfrequency to distribute just produces interference; The interference level energy that the sub-district receives needs sign interfered cell frequency and interference level.
In the enforcement, when confirming dominant frequency point for each sub-district, to each sub-district, if in the interfered cell of this sub-district the frequency that did not occur is arranged, the frequency that then will not occur is confirmed as the dominant frequency point of this sub-district; If all frequencies have appearred in the interfered cell of this sub-district, then that interference level is minimum frequency is confirmed as the dominant frequency point of this sub-district.
If the sub-district is gathered in the form of the suffered interference level of each frequency with tabulation, then can form the total interference table of each frequency of sub-district; Then in this total interference table, can compare the interference level that the sub-district receives at each frequency, preferentially select the frequency (be that interference level is minimum, can be made as-1000) that did not occur in the interfered cell, if a plurality ofly select one of them; If secondly all frequencies have appearred in the interfered cell of this sub-district, then select that minimum frequency of interference level, promptly select total dominant frequency point that disturbs minimum frequency as this sub-district.
In the enforcement; When confirming dominant frequency point for each sub-district and distribute the group of frequencies of dominant frequency point correspondence; Can calculate each sub-district earlier in the suffered interference level sum of each frequency; By in the suffered interference level sum of each frequency order from big to small, successively the dominant frequency point is confirmed in each sub-district again, and distribute the corresponding group of frequencies of dominant frequency point.Can receive in the total interference table of each frequency in the sub-district during realization, relatively each sub-district is got the sub-district that receives maximum interference and is preferentially planned in the interference level sum that each frequency receives, and it is big more promptly to be interfered, and priority is high more.
Lift an example, suppose to comprise among the cell list C sub-district ID and be 4 to 21 totally 18 sub-districts, the frequency group of planning has F1, F2, F3, F4, F5, then can construct following tabulation 1:
Each sub-district of table 1 is in the total interference table (unit: dBm) of each frequency
In the table 1, be example with the sub-district of sub-district ID=4: receive F1 interfered cell interfering energy and be-89dBm, maximum in 5 frequencies; Other are 5 to 21 from sub-district ID, and what disturb maximum is the sub-district of sub-district ID=7, receive F1 interfering energy summation to be-90dBm; Comparatively speaking, sub-district ID is that the interference that receives of 4 sub-district is maximum, and priority is the highest; Then preferentially plan the frequency of sub-district 4, for example the dominant frequency point is planned to F4.
In the enforcement, when being the medium and small allocating frequency of TD-SCDMA system, can by adjacent sub-district number order from big to small, carry out following steps to each sub-district successively to needing the sub-district of dividing frequency:
To all sub-districts under the base station under this sub-district,, carry out Frequency Distribution by in the suffered interference level sum of each frequency order from big to small; After having assigned; Confirm the affiliated base station, adjacent area of all unallocated frequencies in sub-district under the affiliated base station, this sub-district; To all sub-districts under the base station under the said adjacent area; Calculate and be updated in the suffered interference level sum of each frequency,, carry out Frequency Distribution by in the suffered interference level sum of each frequency order from big to small.
Wherein, Be updated in the suffered interference level sum of each frequency; Preferable enforcement can be: to all sub-districts under the base station under the said adjacent area, carry out after Frequency Distribution accomplishes in sub-district of every selection, remove sub-district with selection with the sub-district under the base station; To other sub-district of unallocated frequency under the base station under the said adjacent area, all be updated in the suffered interference level sum of each frequency; In the time of can guaranteeing like this to select a sub-district to carry out Frequency Distribution, carry out in the suffered interference level sum of each frequency order from big to small in strict accordance with the sub-district at every turn.
Be example still with the situation of area interference shown in the table 1; If sub-district 4,5,6 is 3 sub-districts under the same base station; Then receive the total interference table of each frequency for needing to upgrade the sub-district after the intact frequency of these three cell allocation; Be other from sub-district ID be 7 to 21 totally 15 sub-districts need calculate the interference level that adds behind 4,5, the 6 planning frequencies of sub-district, as shown in table 2:
The total interference table of each frequency after table 2 upgrades
In the table 2: on frequency F4, the superposeed interfering energy of sub-district 4 of sub-district 7.
In the enforcement,,, when carrying out Frequency Distribution, can consider preferential the selection and the preceding sub-district that once is assigned with the sub-district of frequency with the base station by in the suffered interference level sum of each frequency order from big to small to all sub-districts under the base station under the said adjacent area.
Fig. 3 is the flow chart of an instantiation of the medium and small allocating frequency of TD-SCDMA system, and is as shown in the figure, can comprise:
The cell list S that need carry out Frequency Distribution is read in step 301, initialization;
After all sub-districts among step 304, the tabulation A execute Frequency Distribution; Seek the adjacent area that the overfrequency distribution is not carried out in all sub-districts among the tabulation A again, organizing is tabulation B, seeks corresponding base station, all sub-districts among the B; Tabulation C is formed in all sub-districts under these base stations, make D=C;
Above-mentioned steps 306-309 is actual to be:
Calculate and upgrade the interference table of each sub-district among the C, utilize this table can know that each sub-district is in the suffered interference level sum of each frequency; Wherein, when carrying out interference calculation, select and disturb maximum sub-district Cell1 to carry out Frequency Distribution, comprise and select the only minimum dominant frequency of disturbing; Upgrade the interference level that other sub-district under the affiliated base station NodeB 1 of sub-district Cell1 receives then, according to disturbing order from big to small respectively Frequency Distribution to be carried out in other sub-district under the base station NodeB 1;
And, upgrade the C tabulation, soon done the sub-district of overfrequency planning and removed, continue to carry out the frequency planning of other sub-district, for empty, Frequency Distribution has all been carried out in the sub-district among the C that promptly tabulates until the C tabulation.
Interference level account form in the embodiment of the invention can have multiple, and Fig. 4 calculates sketch map for interference level, and is as shown in Figure 4, provides a kind of interference level to calculate sketch map among the embodiment, and each symbol implication is following among the figure:
B is Serving cell antenna position, and A is interfered cell antenna position, and C is that Serving cell calculates the reference point when disturbing, and B is the height of transmitting antenna that on the C basis, has increased Serving cell B, connects BA, AC;
G1 is the transmitting gain of interfered cell A on AC line direction, and A is a launch point, and C considers the gain of horizontal direction and vertical direction for receiving reference point;
G2 is the receiving gain of interfered cell A on BA line direction, and B is a launch point, and A is an acceptance point, only considers horizontal gain, needn't the Considering Vertical gain.G2 mainly is that the identical situation of dominant frequency distribution can appear in two sub-districts relative for fear of the sector directions angle;
Then presence of intercell interference can adopt the PCCPCH interchannel interference to calculate, like following formula:
Interference level P=PGt+G1+G2-LS-Ln-ACIR
Wherein, PGt is the PCCPCH channel emission power of interfered cell A configuration;
LS is the path loss values of interfered cell A on reference Point C, and LS calculates according to the propagation model that interfered cell A is provided with;
Ln representes the sector loss under the interfered cell A, comprises feeder loss, wire jumper loss etc.;
ACIR representes the adjacent-channel interference ratio, both the performance performances of comprehensive description transmitter and receiver.
Based on same inventive concept; A kind of device of the medium and small allocating frequency of TD-SCDMA system that is also is provided in the embodiment of the invention; Because the principle of this device solves problem is similar with the cell frequency distribution method in the TD-SCDMA system; Therefore the enforcement of this device can repeat part and not give unnecessary details referring to the enforcement of method.
Fig. 5 is the apparatus structure sketch map for the medium and small allocating frequency of TD-SCDMA system, and is as shown in the figure, and this device can comprise:
In the enforcement, determination module can comprise:
First confirms the unit, is used for each sub-district, confirms that there is the frequency that did not occur this area interference sub-district or all frequencies occurred;
Second confirms the unit, is used for when said first confirms that the unit confirms that the interfered cell of this sub-district has the frequency that did not occur, the frequency that did not occur being confirmed as the dominant frequency point of this sub-district; When said first confirmed that the unit confirms that all frequencies have appearred in the interfered cell of this sub-district, the frequency that interference level is minimum was confirmed as the dominant frequency point of this sub-district.
As shown in Figure 5, this device can also comprise in the enforcement:
In the enforcement, determination module 501 can also be used for:
To needing the sub-district of dividing frequency,, successively following steps are carried out in each sub-district by adjacent sub-district number order from big to small:
To all sub-districts under the base station under this sub-district,, confirm the dominant frequency point by in the suffered interference level sum of each frequency order from big to small;
After all cell allocation group of frequencies are accomplished under the base station under distribution module 502 is this sub-district; Confirm the affiliated base station, adjacent area of all unallocated frequencies in sub-district under the affiliated base station, this sub-district; To all sub-districts under the base station under the said adjacent area; Calculate and be updated in the suffered interference level sum of each frequency,, confirm the dominant frequency point by in the suffered interference level sum of each frequency order from big to small.
In the enforcement, determination module 501 can also be used for:
To all sub-districts under the base station under the said adjacent area; In distribution module 502 is after group of frequencies distribution completion is carried out in a sub-district at every turn; Except that with this sub-district with the sub-district under the base station; To other sub-district of unallocated frequency under the base station under the said adjacent area, all be updated in the suffered interference level sum of each frequency.
In the enforcement, determination module 501 can also be used for:
The preferential selection and the preceding sub-district that once is assigned with the sub-district of module 502 dividing frequencies with the base station confirmed the dominant frequency point.
As shown in Figure 5, this device can also comprise in the enforcement:
P＝PGt+G1+G2-LS-Ln-ACIR；
Wherein: P is an interference level; PGt is the PCCPCH channel emission power of interfered cell configuration; G1 is the transmitting gain on the reference point line direction of interfered cell when interfered cell antenna position and Serving cell calculating interference; G2 is the receiving gain of interfered cell on Serving cell antenna position and interfered cell antenna position line direction; LS is the path loss values on the reference point of interfered cell when Serving cell calculates interference; Ln is the sector loss under the interfered cell; ACIR is the adjacent-channel interference ratio.
Can learn by the foregoing description; The embodiment of the invention is divided timing carrying out frequency for the sub-district in the TD-SCDMA system; For confirming the dominant frequency point in each sub-district, wherein, suffered interference is put less than in the suffered interference of other frequency in dominant frequency in dominant frequency point different and each sub-district in each sub-district under the same base station; The dominant frequency point definite according to each sub-district; Be the corresponding group of frequencies of each cell allocation dominant frequency point; Can solve the frequency planning problem of existing TD-SCDMA system; Reducing the dominant frequency of each minizone in the TD-SCDMA system disturbs; Avoid the relative sub-district of sector directions situation to occur,, can improve the availability of frequency spectrum with respect to the inter-frequency networking mode with dominant frequency; With respect to the identical networking mode, can reduce between dominant frequency and disturb.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.And the present invention can be employed in the form that one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code go up the computer program of implementing.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the 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 through the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented 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 appointments.
These computer program instructions also can be stored in ability 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 implemented in 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 producing computer implemented processing, thereby the instruction of on computer or other programmable devices, carrying out is provided for being implemented in 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.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a TD SDMA inserts the cell frequency distribution method in the TD-SCDMA system, it is characterized in that, comprises the steps:
Calculate each sub-district in the suffered interference level sum of each frequency;
To needing the sub-district of dividing frequency,, successively following steps are carried out in each sub-district by adjacent sub-district number order from big to small:
To all sub-districts under the base station under this sub-district, distribute by carry out frequency in the suffered interference level sum of each frequency order from big to small, for confirming the dominant frequency point in each sub-district, the dominant frequency point based on each sub-district is confirmed is the corresponding group of frequencies of each cell allocation dominant frequency point;
After having assigned; Confirm the affiliated base station, adjacent area of all unallocated frequencies in sub-district under the affiliated base station, this sub-district; To all sub-districts under the base station under the said adjacent area; Calculate and be updated in the suffered interference level sum of each frequency,, carry out Frequency Distribution by in the suffered interference level sum of each frequency order from big to small;
Wherein, suffered interference is put less than in the suffered interference of other frequency in dominant frequency in dominant frequency point different and each sub-district in each sub-district under the same base station.
2. the method for claim 1 is characterized in that, saidly confirms the dominant frequency point for each sub-district, comprising:
For each sub-district, if in the interfered cell of this sub-district the frequency that did not occur is arranged, the frequency that then will not occur is confirmed as the dominant frequency point of this sub-district; If all frequencies have appearred in the interfered cell of this sub-district, then that interference level is minimum frequency is confirmed as the dominant frequency point of this sub-district.
3. the method for claim 1 is characterized in that, said calculating also is updated in the suffered interference level sum of each frequency, comprising:
To all sub-districts under the base station under the said adjacent area; After the Frequency Distribution completion is carried out in sub-district of every selection; Except that with the sub-district of selecting with the sub-district under the base station, to other sub-district of unallocated frequency under the base station under the said adjacent area, all be updated in the suffered interference level sum of each frequency.
4. the method for claim 1; It is characterized in that, said to all sub-districts under the base station under the said adjacent area, press in the suffered interference level sum of each frequency order from big to small; When carrying out Frequency Distribution, the preferential selection and the preceding sub-district that once is assigned with the sub-district of frequency with the base station.
5. like each described method of claim 1 to 4, it is characterized in that, calculate interference level by following formula:
P＝PGt+G1+G2-LS-Ln-ACIR；
Wherein: P is an interference level; PGt is the PCCPCH channel emission power of interfered cell configuration; G1 is the transmitting gain on the reference point line direction of interfered cell when interfered cell antenna position and Serving cell calculating interference; G2 is the receiving gain of interfered cell on Serving cell antenna position and interfered cell antenna position line direction; LS is the path loss values on the reference point of interfered cell when Serving cell calculates interference; Ln is the sector loss under the interfered cell; ACIR is the adjacent-channel interference ratio.
6. one kind is the device of the medium and small allocating frequency of TD-SCDMA system, it is characterized in that, comprising:
First computing module is used to calculate each sub-district in the suffered interference level sum of each frequency;
Determination module; Be used for needing the sub-district of dividing frequency; By adjacent sub-district number order from big to small; Successively following steps are carried out in each sub-district:,, select a sub-district to confirm the dominant frequency point successively by in the suffered interference level sum of each frequency order from big to small to all sub-districts under the base station under this sub-district;
Distribution module is used for after dominant frequency point is confirmed in sub-district of the every selection of said determination module, is the corresponding group of frequencies of selecting of sub-district dominant frequency point;
Said determination module; Also be used for to each sub-district, after all cell allocation group of frequencies are accomplished under the base station under distribution module is this sub-district, confirm the affiliated base station, adjacent area of all unallocated frequencies in sub-district under the affiliated base station, this sub-district; To all sub-districts under the base station under the said adjacent area; Calculate and be updated in the suffered interference level sum of each frequency,, carry out Frequency Distribution by in the suffered interference level sum of each frequency order from big to small;
Wherein, suffered interference is put less than in the suffered interference of other frequency in dominant frequency in dominant frequency point different and each sub-district in each sub-district under the same base station.
7. device as claimed in claim 6 is characterized in that, said determination module comprises:
First confirms the unit, is used for each sub-district, confirms that there is the frequency that did not occur this area interference sub-district or all frequencies occurred;
Second confirms the unit, is used for when said first confirms that the unit confirms that the interfered cell of this sub-district has the frequency that did not occur, the frequency that did not occur being confirmed as the dominant frequency point of this sub-district; When said first confirmed that the unit confirms that all frequencies have appearred in the interfered cell of this sub-district, the frequency that interference level is minimum was confirmed as the dominant frequency point of this sub-district.
8. device as claimed in claim 7 is characterized in that, said determination module is further used for:
To all sub-districts under the base station under the said adjacent area; In said distribution module is after group of frequencies distribution completion is carried out in a sub-district at every turn; Except that with this sub-district with the sub-district under the base station; To other sub-district of unallocated frequency under the base station under the said adjacent area, all be updated in the suffered interference level sum of each frequency.
9. device as claimed in claim 7 is characterized in that, said determination module is further used for:
The preferential selection confirmed the dominant frequency point with preceding once by the sub-district of the sub-district of said module assigns frequency with the base station.
10. like each described device of claim 7 to 9, it is characterized in that, also comprise:
Second computing module is used for calculating interference level by following formula:
P＝PGt+G1+G2-LS-Ln-ACIR；
Wherein: P is an interference level; PGt is the PCCPCH channel emission power of interfered cell configuration; G1 is the transmitting gain on the reference point line direction of interfered cell when interfered cell antenna position and Serving cell calculating interference; G2 is the receiving gain of interfered cell on Serving cell antenna position and interfered cell antenna position line direction; LS is the path loss values on the reference point of interfered cell when Serving cell calculates interference; Ln is the sector loss under the interfered cell; ACIR is the adjacent-channel interference ratio.
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| CN102065438A (en) * | 2010-12-22 | 2011-05-18 | 大唐移动通信设备有限公司 | Method and equipment for acquiring and networking frequency point sets |
| CN102448069B (en) * | 2011-12-31 | 2014-05-21 | 京信通信系统（中国）有限公司 | Soft frequency reusing method and device based on cognitive technology and base station |
| CN103260164B (en) * | 2012-02-20 | 2016-09-07 | 中国移动通信集团广东有限公司 | A kind of cell frequency distribution method and cell frequency distribution system |
| CN104254080B (en) * | 2013-06-28 | 2018-07-27 | 中国移动通信集团公司 | A kind of inter-frequency networking method |
| CN106817768B (en) * | 2015-12-01 | 2020-07-31 | 中国移动通信集团广东有限公司 | TD-SCDMA network frequency allocation method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1413035A (en) * | 2001-10-12 | 2003-04-23 | 上海大唐移动通信设备有限公司 | Optimized selection method for distributing intermediate frequency point of frequency |
| CN101030812A (en) * | 2007-03-26 | 2007-09-05 | 中国移动通信集团公司 | Method for grouping N-frequency point network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1413035A (en) * | 2001-10-12 | 2003-04-23 | 上海大唐移动通信设备有限公司 | Optimized selection method for distributing intermediate frequency point of frequency |
| CN101030812A (en) * | 2007-03-26 | 2007-09-05 | 中国移动通信集团公司 | Method for grouping N-frequency point network |
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