CN102026169B - Method and equipment for distributing physical cell ID - Google Patents
Method and equipment for distributing physical cell ID Download PDFInfo
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- CN102026169B CN102026169B CN 201010612371 CN201010612371A CN102026169B CN 102026169 B CN102026169 B CN 102026169B CN 201010612371 CN201010612371 CN 201010612371 CN 201010612371 A CN201010612371 A CN 201010612371A CN 102026169 B CN102026169 B CN 102026169B
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Abstract
The embodiment of the invention relates to the technical field of wireless communication, in particular to a method and equipment for distributing physical cell ID. The invention is used for solving the problem in the prior art that the physical cell ID is suitable for being distributed in the small networks and is hard to be distributed in the large long term evolution (LTE) networks. The method provided by the embodiment of the invention comprises the following steps: determining a first index serial number and a second index serial number corresponding to a cell to which the physical cell ID is needed to be distributed; and determining the physical cell ID of the cell according to the determined first index serial number and second index serial number. By utilizing the embodiment of the invention, the physical cell ID can be automatically distributed, thus the physical cell ID can be distributed in the large LTE network, the distribution efficiency is improved, and the manual workload is reduced.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of method and apparatus that distributes Physical Cell Identifier.
Background technology
Due to TD-LTE (Time Division Long Term Evolution; Synchronous Long Term Evolution of time-division) in system, physical district ID (sign) is bound one by one with mechanism such as resource mapping, code resource distribution and frequency hoppings, so the same TD-SCDMA of the configuration of physical district ID (Time Division Synchronized CodeDivision Multiple Access; TD SDMA) the scrambling code planning effect in system is suitable, seems particularly important in identical networking.
Physical district ID is major decision information, particularly broadcast channel and the control channel that in physical channel, the scrambler initial value generates, and the correlation of physical district ID has determined the correlation of control channel scrambler, plays a part crucial to the interference of channel.
Due to physical district ID and PSC (Primary Synchronization Code, Primary Synchronisation Code)/SSC (Secondary Synchronization Code, secondary synchronization code) sequence index is number one by one corresponding, produce for fear of neighbor cell and disturb, need to reasonably plan 504 physical layer residential quarter ID.
Also there is no at present large-scale LTE network, the scale of try net is all smaller, so manual mode is all adopted in the planning of physical district ID, namely adopt artificial mode to pick out the ID that satisfies distribution principle from 504 candidate ID, manual configuration is in cell parameter.If network size enlarges, relate in particular to the multiplexing situation of ID, tend to produce very large workload by manual type, and be difficult to take into account the situation of whole network.
In sum, distribute at present physical district ID to be applicable to the smaller network of scale, be difficult at large-scale LTE network allocation physical district ID.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus that distributes Physical Cell Identifier, is applicable to the smaller network of scale in order to solve the distribution physical district ID that exists in prior art, is difficult to the problem at large-scale LTE network allocation physical district ID.
A kind of method of distributing Physical Cell Identifier that the embodiment of the present invention provides comprises:
Determine to need distribute the first index sequence corresponding to the residential quarter of Physical Cell Identifier number and the second index sequence number;
According to the first index sequence of determining number and the second index sequence number, determine the Physical Cell Identifier of this residential quarter.
Described the first index sequence number is Primary Synchronisation Code PSC sequence index number, and the second index sequence number is secondary synchronization code SSC sequence index number.
Determine the first index sequence corresponding to residential quarter number according to the following step:
For a base station, be each cell allocation first index sequence number under the base station at random; Or
For a base station, be each cell allocation first index sequence number under the base station according to the first index sequence number descending or ascending order.
Determine the second index sequence corresponding to residential quarter number according to the following step:
The residential quarter of distributing Physical Cell Identifier for needs number travels through each second index sequence, determines each second index sequence number all satisfied distribution principles;
According to the corresponding relation of distribution principle and mark, determine each second index sequence number satisfied mark corresponding to each distribution principle, and determine all mark sums of each the second index sequence correspondence;
Greater than the second index sequence of threshold value number, select second index sequence number as the second index sequence corresponding to the residential quarter that needs to distribute Physical Cell Identifier number from the mark sum of correspondence.
Described distribution principle comprises one or more in following principle:
Unequal with the CELL_ID of each adjacent area;
Unequal with CELL_ID mod 6 values of each adjacent area;
M in the m sequence of the second index sequence of the adjacent area number identical with the first index sequence number
0Mod 8 value and m
1Mod 8 is unequal;
Unequal with CELL_ID mod (2 * descending RB number) value of each adjacent area.
Describedly determine that the first index sequence number and the second index sequence number also comprise before:
Determine the priority of each residential quarter according to cell density;
According to priority order from high to low, determine to need to distribute the residential quarter of Physical Cell Identifier.
The priority of described definite each residential quarter comprises:
The quantity of adjacent area is not less than all little differentiations of the first threshold value in the first set, with the quantity of adjacent area less than the first threshold value and all little differentiations of being not less than the second threshold value in the second set, with the quantity of adjacent area less than all little differentiations of the second threshold value in the 3rd set;
Wherein, the first threshold value is greater than the second threshold value, and in the first set, the priority of each residential quarter is the highest, and in the second set, the priority of each residential quarter is taken second place, and in the 3rd set, the priority of each residential quarter is minimum.
The priority of described definite each residential quarter comprises:
For a set,, near to order far away sorted in the adjacent area of each residential quarter according to distance;
Determine each residential quarter and top n adjacent area apart from sum, wherein N is positive integer;
According to the larger order of the less priority of distance sum, determine the priority of each residential quarter.
A kind of equipment that distributes Physical Cell Identifier that the embodiment of the present invention provides comprises:
Distribution module be used for to determine need is distributed the first index sequence corresponding to the residential quarter of Physical Cell Identifier number and the second index sequence number;
The sign determination module is used for determining the Physical Cell Identifier of this residential quarter according to the first index sequence of determining number and the second index sequence number.
Described distribution module specifically is used for:
For a base station, be each cell allocation first index sequence number under the base station at random; Or
For a base station, be each cell allocation first index sequence number under the base station according to the first index sequence number descending or ascending order.
Described distribution module specifically is used for:
The residential quarter of distributing Physical Cell Identifier for needs number travels through each second index sequence, determines each second index sequence number all satisfied distribution principles; According to the corresponding relation of distribution principle and mark, determine each second index sequence number satisfied mark corresponding to each distribution principle, and determine all mark sums of each the second index sequence correspondence; Greater than the second index sequence of threshold value number, select second index sequence number as the second index sequence corresponding to the residential quarter that needs to distribute Physical Cell Identifier number from the mark sum of correspondence.
Described distribution principle comprises one or more in following principle:
Unequal with the CELL_ID of each adjacent area;
Unequal with CELL_ID mod 6 values of each adjacent area;
M in the m sequence of the second index sequence of the adjacent area number identical with the first index sequence number
0Mod 8 value and m
1Mod 8 is unequal;
Unequal with CELL_ID mod (2 * descending RB number) value of each adjacent area.
Described distribution module also is used for:
Determine the priority of each residential quarter according to cell density; According to priority order from high to low, determine to need to distribute the residential quarter of Physical Cell Identifier.
Described distribution module specifically is used for:
With all little differentiations of not little first threshold value of quantity of adjacent area in the first set, with the quantity of adjacent area less than the first threshold value and all little differentiations of being not less than the second threshold value in the second set, with the quantity of adjacent area less than all little differentiations of the second threshold value in the 3rd set;
Wherein, the first threshold value is greater than the second threshold value, and in the first set, the priority of each residential quarter is the highest, and in the second set, the priority of each residential quarter is taken second place, and in the 3rd set, the priority of each residential quarter is minimum.
Described distribution module specifically is used for:
For a set,, near to order far away sorted in the adjacent area of each residential quarter according to distance; Determine each residential quarter and top n adjacent area apart from sum, wherein N is positive integer; According to the larger order of the less priority of distance sum, determine the priority of each residential quarter.
Because the embodiment of the present invention can be distributed physical district ID automatically, thereby can improve allocative efficiency at large-scale LTE network allocation physical district ID, reduce labor workload.
Description of drawings
Fig. 1 is the method flow schematic diagram that the embodiment of the present invention is distributed Physical Cell Identifier;
Fig. 2 is the method flow schematic diagram that the embodiment of the present invention is distributed PSC and SSC call number;
Fig. 3 is the device structure schematic diagram that the embodiment of the present invention is distributed Physical Cell Identifier.
Embodiment
The embodiment of the present invention is distributed the first index sequence corresponding to the residential quarter of Physical Cell Identifier number and the second index sequence number as required, determines the Physical Cell Identifier of this residential quarter.Because the embodiment of the present invention can be distributed physical district ID automatically, thereby can improve allocative efficiency at large-scale LTE network allocation physical district ID, reduce labor workload.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Figure 1, the embodiment of the present invention distributes the method for Physical Cell Identifier to comprise the following steps:
Step 101, determine to need distribute the first index sequence corresponding to the residential quarter of Physical Cell Identifier number and the second index sequence number.
Step 102, according to the first index sequence of determining number and the second index sequence number, determine the Physical Cell Identifier of this residential quarter.
Wherein, the first index sequence of the embodiment of the present invention number can be PSC sequence index number, and the second index sequence number can be SSC sequence index number.
In step 101, can determine the first index sequence corresponding to residential quarter number according to following manner:
For a base station, be each cell allocation first index sequence number under the base station at random; Or
For a base station, be each cell allocation first index sequence number under the base station according to the first index sequence number descending or ascending order.
Due at least one residential quarter being arranged under each base station, for each base station, can be with each cell allocation first index sequence number that is under each base station.
Because there is cell number the residential quarter under each base station, and the first index sequence number have size minute, can according to the size of the first index sequence number, be each cell allocation first index sequence under the base station.
Number be PSC index sequence number with the first index sequence, the first index sequence number ascending order is that example describes.
PSC has 3 master sync signals, and call number is 0,1,2, will reduce the interference between neighbor cell during networking, and neighbor cell need to adopt different main synchronizing sequences.In existing network, not only 2 far away of adjacent areas of a residential quarter, and that network topology also may not be for standard is cellular are therefore can't avoid interference by the distribution of PSC sequence index number.Can only adopt the principle according to a plurality of minizones cycle assignment PSC call number under same base station that the interference between PSC is reduced as far as possible.
If 3 residential quarters are arranged under certain base station, cell number is 1,2,3, distributes respectively according to 0,1,2 order, and namely residential quarter 1 is 0, and residential quarter 2 is 1, and residential quarter 3 is 2; If the residential quarter number of base station is not 3 of standard, still distribute according to the order of 0,1,2 circulations under same base station.
Need to prove, the embodiment of the present invention is not limited to above-mentioned two kinds of methods of salary distribution, and other can be the applicable equally embodiment of the present invention of the mode of cell allocation the first index sequence number.
In step 101, can determine the second index sequence corresponding to residential quarter number according to following manner:
S1, distribute the residential quarter of Physical Cell Identifier for needs, each second index sequence number is traveled through, determine each second index sequence number all satisfied distribution principles;
S2, according to the corresponding relation of distribution principle and mark, determine each second index sequence number satisfied mark corresponding to each distribution principle, and determine all mark sums of each the second index sequence correspondence;
S3, from the mark sum of correspondence greater than the second index sequence of threshold value number, select second index sequence number as the second index sequence corresponding to the residential quarter that needs to distribute Physical Cell Identifier number.
The threshold value here can be set as required.
Distribution principle includes but not limited to one or more in following principle:
Unequal with the CELL_ID of each adjacent area; Residential quarter A and residential quarter B adjacent area each other for example, if the ID of residential quarter A is set to 1, the ID of residential quarter B can not be made as 1.
With CELL_ID mod 6 values of each adjacent area unequal (CELL_ID mod 6 be CELL_ID to 6 remainder numbers, under coexist that this repeats no more); Residential quarter A and residential quarter B adjacent area each other for example, if the ID of residential quarter A is set to 1, the ID of residential quarter B can not be made as 6 * n+1, wherein n is the integer between 0～83.
M in the m sequence of the second index sequence of the adjacent area number identical with the first index sequence number
0Mod 8 value and m
1Mod 8 all unequal (namely when number identical with the first index sequence of adjacent area, the m in the m sequence of the second index sequence of this residential quarter number
0M in the m sequence of the second index sequence of mod 8 value and this adjacent cell number
0Mod 8 value is not identical, and the m in the m sequence of the second index sequence of this residential quarter number
1M in the m sequence of the second index sequence of mod 8 value and this adjacent cell number
1Mod 8 values are not identical; That is to say, these two the m0mod8 of adjacent residential quarter is unequal each other, and m1mod8 is unequal); Suppose residential quarter A and residential quarter B adjacent area each other, (the first index sequence that is its correspondence number is that 1, m0 is 0 if the ID of residential quarter A is set to 1, m1 is 1), the ID of residential quarter B can not be made as 25 (the first index sequence that is its correspondence number is that 1, m0 is that 8, m1 is 9); M wherein
0And m
1It is cyclic shift value.
Unequal with CELL_ID mod (2 * descending RB (Resource Block, the Resource Block) number) value of each adjacent area.Residential quarter A and residential quarter B adjacent area each other for example, descending RB number is 100, if the ID of residential quarter A is set to 1, the ID of residential quarter B can not be made as 200 * n+1, wherein n is the integer between 0～2.
Specifically can be referring to table 1:
Table 1
In step S1, determine each second index sequence number satisfies which distribution principle in table 1.
The corresponding mark of each distribution principle specifically can be determined mark according to the order of severity of distribution principle, and such as the order of severity is high, mark can be 10 minutes; During the order of severity was, mark can be 1 minute.
The corresponding relation of distribution principle and mark can upgrade according to the variation of distribution principle.
In step S2, determine each second index sequence number satisfied mark corresponding to each distribution principle, then to same the second index sequence correspondence with the mark addition.
In step S3, mark sum and the threshold value of each the second index sequence correspondence compared, pick out greater than the second index sequence of threshold value number, and select second index sequence number from the second index sequence of picking out number.Better the second index sequence that can select corresponding mark sum maximum number.
Number being SSC index sequence number take the second index sequence describes as example.
Travel through 168 SSC index sequence number, calculate the score of each index sequence number, if number appearing at, certain index sequence meets in number set of the corresponding available index of the distribution principle that to observe, count to get 10 minutes, appear at and meet in the set of the corresponding SSC call number of the distribution principle of as far as possible observing, count to get 1 minute.All calculate the score of 168 SSC index sequence number, the SSC index sequence number of getting best result is as the SSC sequence index of distributing number, and is a plurality of if the SSC sequence index of best result number has, and selects at random one.
In force, can judge just whether distribution is successful according to score: if the scrambler score of distributing at last surpasses 30 minutes, mean that namely it meets 3 the code planning distribution principles that must observe at least, this distribution is successfully; If lower than 30 minutes, mean its at least satisfied 1 distribution principle that must observe, then according to the height of priority, satisfy the high distributive condition of priority as far as possible.
Suppose residential quarter A and residential quarter B adjacent area each other, descending RB number is 100, if the ID of residential quarter A is set to 1, the ID of residential quarter B gets respectively 0～503 score and sees Table 2.Can choose the highest ID of score value arrange to residential quarter B this moment, and peak has a plurality ofly chooses any one.In actual conditions, when the adjacent area of residential quarter B is more, the ID of high score will be fewer, and namely the choice will be less.
Table 2
In step 102, can determine Physical Cell Identifier according to formula one:
Wherein,
It is Physical Cell Identifier;
It is the second index sequence number;
It is the first index sequence number.
Because the planning of physical district ID is the complete problem of a NP (Non-deterministicPolynomial, indecisive multinomial) on mathematics, optimal solution needing to obtain a large amount of searching computing time.Usually adopt in practice didactic optimized algorithm or more simple searching algorithm.At this moment the physical district ID planning order is just on obtaining optimal solution or near the probability of optimal solution, certain impact being arranged.Be reflected in the middle of reality, the area that cell density is higher has higher planning difficulty, and is usually the main cause of planning failure, at this moment should make the residential quarter in high density area have higher priority, pays the utmost attention to when planning.
Better, can further include before step 101:
Determine the priority of each residential quarter according to cell density;
According to priority order from high to low, determine to need to distribute the residential quarter of Physical Cell Identifier.
Concrete, with all little differentiations of not little first threshold value of quantity of adjacent area in the first set, with the quantity of adjacent area less than the first threshold value and all little differentiations of being not less than the second threshold value in the second set, with the quantity of adjacent area less than all little differentiations of the second threshold value in the 3rd set;
Wherein, the first threshold value is greater than the second threshold value, and in the first set, the priority of each residential quarter is the highest, and in the second set, the priority of each residential quarter is taken second place, and in the 3rd set, the priority of each residential quarter is minimum.
Here the first threshold value and the second threshold value can be set as required.
Better, after the priority of having determined set, can also determine respectively the priority of each residential quarter in each set.
Concrete, for a set,, near to order far away sorted in the adjacent area of each residential quarter according to distance; Determine each residential quarter and top n adjacent area apart from sum, wherein N is positive integer; According to the larger order of the less priority of distance sum, determine the priority of each residential quarter.
The below is that 12, the second threshold values are that 6, N 6 describes for example with the first threshold value.
1, the distance according to residential quarter and adjacent area sorts to the adjacent area respectively from small to large.
2, the adjacent area number of correspondence being not less than the residential quarter rule of 12 is a class, the plan priority level of this class residential quarter is the highest, for each this class residential quarter, by front 6 adjacent areas to the residential quarter generate the planning order value apart from sum, the plan priority level that is worth less respective cell is higher.
3, with the adjacent area number of correspondence less than 12 and to be not less than the residential quarter rule of 6 be a class, the plan priority level of this class residential quarter is the highest, for each this class residential quarter, by front 6 adjacent areas to the residential quarter generate the planning order value apart from sum, the plan priority level that is worth less respective cell is higher.
4, be a class with the adjacent area number of correspondence less than the residential quarter rule of 6, the plan priority level of this class residential quarter is the highest, for each this class residential quarter, by front 6 adjacent areas to the residential quarter generate the planning order value apart from sum, the plan priority level that is worth less respective cell is higher.
Certainly, in part or all of the set, the priority of each residential quarter also can be determined priority or determine at random priority according to predefined order.
Need to prove, except the mode of definite priority of introducing above, the embodiment of the present invention can also be heightened by artificial setting the distribution principle priority of a certain residential quarter, and the order of Physical Cell Identifier can directly be set by hand.
As shown in Figure 2, the embodiment of the present invention distributes the method for PSC and SSC call number to comprise the following steps:
Step 201, read in the adjacent area data and process.
Wherein, before carry out step 201, physical district ID planning needs to use residential quarter distributed data and Neighboring Cell List data automatically.Therefore before physical district ID planning, need to possess following condition:
1, first carry out field intensity prediction, generate the view of cells layer;
2, carry out adjacent section planning, configure the Neighboring Cell List of each residential quarter.
Concrete, in step 201, read in the adjacent area of all residential quarters;
Whether each other to check between this residential quarter and adjacent cell the adjacent area, if not neighboring BS relationship each other, directly revise neighboring BS relationship, make it to become neighboring BS relationship each other.If in the adjacent cell of A, B is arranged, and A not in the adjacent cell of B, A and B are not adjacent cell relations each other so.
Step 202, determine the priority of each residential quarter.
Step 203, determine successively that according to the order of priority each need to distribute the residential quarter of Physical Cell Identifier.
Step 204, be current cell allocation PSC sequence index number.
Step 205, according to distribution principle, be current cell allocation SSC sequence index number.
Wherein, step 204 and step 205 do not have inevitable sequential relationship, both can first execution in step 204, in execution in step 205; Also can first execution in step 205, in execution in step 204; Can also while execution in step 204 and step 205.
Step 206, according to PSC sequence index number and SSC sequence index number, determine the Physical Cell Identifier of current area.
Step 207, check whether Physical Cell Identifier, if it is process ends have all been distributed in all residential quarters; Otherwise, return to step 203.
Based on same inventive concept, a kind of equipment that distributes Physical Cell Identifier also is provided in the embodiment of the present invention, because the principle that this equipment is dealt with problems is similar to the method for distributing Physical Cell Identifier, so the enforcement of this equipment can referring to the enforcement of method, repeat part and repeat no more.
As shown in Figure 3, the embodiment of the present invention distributes the equipment of Physical Cell Identifier to comprise: distribution module 10 and sign determination module 20.
Distribution module 10 be used for to determine need is distributed the first index sequence corresponding to the residential quarter of Physical Cell Identifier number and the second index sequence number.
Sign determination module 20 is used for determining the Physical Cell Identifier of this residential quarter according to the first index sequence of determining number and the second index sequence number.
For a base station, distribution module 10 is each cell allocation first index sequence number under the base station at random; Or
For a base station, distribution module 10 is each cell allocation first index sequence number under the base station according to the first index sequence number descending or ascending order.
Wherein, distribute the residential quarter of Physical Cell Identifier for needs, distribution module 10 number travels through each second index sequence, determines each second index sequence number all satisfied distribution principles; According to the corresponding relation of distribution principle and mark, determine each second index sequence number satisfied mark corresponding to each distribution principle, and determine all mark sums of each the second index sequence correspondence; Greater than the second index sequence of threshold value number, select second index sequence number as the second index sequence corresponding to the residential quarter that needs to distribute Physical Cell Identifier number from the mark sum of correspondence.
Distribution principle includes but not limited to one or more in following principle:
Unequal with the CELL_ID of each adjacent area;
Unequal with CELL_ID mod 6 values of each adjacent area;
M in the m sequence of the second index sequence of the adjacent area number identical with the first index sequence number
0Mod 8 value and m
1Mod 8 is unequal;
Unequal with CELL_ID mod (2 * descending RB number) value of each adjacent area.
In force, sign determination module 20 can be determined Physical Cell Identifier according to formula one.
Better, distribution module 10 can also be determined according to cell density the priority of each residential quarter; According to priority order from high to low, determine to need to distribute the residential quarter of Physical Cell Identifier.
Concrete, distribution module 10 with all little differentiations of not little first threshold value of quantity of adjacent area in the first set, with the quantity of adjacent area less than the first threshold value and all little differentiations of being not less than the second threshold value in the second set, with the quantity of adjacent area less than all little differentiations of the second threshold value in the 3rd set;
Wherein, the first threshold value is greater than the second threshold value, and in the first set, the priority of each residential quarter is the highest, and in the second set, the priority of each residential quarter is taken second place, and in the 3rd set, the priority of each residential quarter is minimum.
For a set, distribution module 10, sorts to the adjacent area of each residential quarter near to order far away according to distance; Determine each residential quarter and top n adjacent area apart from sum, wherein N is positive integer; According to the larger order of the less priority of distance sum, determine the priority of each residential quarter.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of 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 producing 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 get 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.
Because the embodiment of the present invention can be distributed physical district ID automatically, thereby can improve allocative efficiency at large-scale LTE network allocation physical district ID, reduce labor workload.
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 claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. a method of distributing Physical Cell Identifier, is characterized in that, the method comprises:
Determine to need distribute the first index sequence corresponding to the residential quarter of Physical Cell Identifier number and the second index sequence number;
According to the first index sequence of determining number and the second index sequence number, determine the Physical Cell Identifier of this residential quarter;
Determine the second index sequence corresponding to residential quarter number according to the following step:
The residential quarter of distributing Physical Cell Identifier for needs number travels through each second index sequence, determines each second index sequence number all satisfied distribution principles;
According to the corresponding relation of distribution principle and mark, determine each second index sequence number satisfied mark corresponding to each distribution principle, and determine all mark sums of each the second index sequence correspondence;
Greater than the second index sequence of threshold value number, select second index sequence number as the second index sequence corresponding to the residential quarter that needs to distribute Physical Cell Identifier number from the mark sum of correspondence.
2. the method for claim 1, is characterized in that, described the first index sequence number is Primary Synchronisation Code PSC sequence index number, and the second index sequence number is secondary synchronization code SSC sequence index number.
3. the method for claim 1, is characterized in that, determines the first index sequence corresponding to residential quarter number according to the following step:
For a base station, be each cell allocation first index sequence number under the base station at random; Or
For a base station, be each cell allocation first index sequence number under the base station according to the first index sequence number descending or ascending order.
4. the method for claim 1, is characterized in that, described distribution principle comprises one or more in following principle:
Unequal with the CELL_ID of each adjacent area;
Unequal with the CELL_ID mod6 value of each adjacent area;
M in the m sequence of the second index sequence of the adjacent area number identical with the first index sequence number
0Mod8 value and m
1Mod 8 is unequal;
Unequal with CELL_ID mod (2 * downlink resource piece RB number) value of each adjacent area.
5. the method for claim 1, is characterized in that, describedly determines that the first index sequence number and the second index sequence number also comprise before:
Determine the priority of each residential quarter according to cell density;
According to priority order from high to low, determine to need to distribute the residential quarter of Physical Cell Identifier.
6. method as claimed in claim 5, is characterized in that, the priority of described definite each residential quarter comprises:
The quantity of adjacent area is not less than all little differentiations of the first threshold value in the first set, with the quantity of adjacent area less than the first threshold value and all little differentiations of being not less than the second threshold value in the second set, with the quantity of adjacent area less than all little differentiations of the second threshold value in the 3rd set;
Wherein, the first threshold value is greater than the second threshold value, and in the first set, the priority of each residential quarter is the highest, and in the second set, the priority of each residential quarter is taken second place, and in the 3rd set, the priority of each residential quarter is minimum.
7. method as claimed in claim 6, is characterized in that, the priority of described definite each residential quarter comprises:
For a set,, near to order far away sorted in the adjacent area of each residential quarter according to distance;
Determine each residential quarter and top n adjacent area apart from sum, wherein N is positive integer;
According to the larger order of the less priority of distance sum, determine the priority of each residential quarter.
8. an equipment that distributes Physical Cell Identifier, is characterized in that, this equipment comprises:
Distribution module be used for to determine need is distributed the first index sequence corresponding to the residential quarter of Physical Cell Identifier number and the second index sequence number;
The sign determination module is used for determining the Physical Cell Identifier of this residential quarter according to the first index sequence of determining number and the second index sequence number;
Described distribution module specifically is used for:
The residential quarter of distributing Physical Cell Identifier for needs number travels through each second index sequence, determines each second index sequence number all satisfied distribution principles; According to the corresponding relation of distribution principle and mark, determine each second index sequence number satisfied mark corresponding to each distribution principle, and determine all mark sums of each the second index sequence correspondence; Greater than the second index sequence of threshold value number, select second index sequence number as the second index sequence corresponding to the residential quarter that needs to distribute Physical Cell Identifier number from the mark sum of correspondence.
9. equipment as claimed in claim 8, is characterized in that, described distribution module specifically is used for:
For a base station, be each cell allocation first index sequence number under the base station at random; Or
For a base station, be each cell allocation first index sequence number under the base station according to the first index sequence number descending or ascending order.
10. equipment as claimed in claim 8, is characterized in that, described distribution principle comprises one or more in following principle:
Unequal with the CELL_ID of each adjacent area;
Unequal with CELL_ID mod 6 values of each adjacent area;
M in the m sequence of the second index sequence of the adjacent area number identical with the first index sequence number
0Mod 8 value and m
1Mod 8 is unequal;
Unequal with CELL_ID mod (2 * descending RB number) value of each adjacent area.
11. equipment as claimed in claim 8 is characterized in that, described distribution module also is used for:
Determine the priority of each residential quarter according to cell density; According to priority order from high to low, determine to need to distribute the residential quarter of Physical Cell Identifier.
12. equipment as claimed in claim 11 is characterized in that, described distribution module specifically is used for:
With all little differentiations of not little first threshold value of quantity of adjacent area in the first set, with the quantity of adjacent area less than the first threshold value and all little differentiations of being not less than the second threshold value in the second set, with the quantity of adjacent area less than all little differentiations of the second threshold value in the 3rd set;
Wherein, the first threshold value is greater than the second threshold value, and in the first set, the priority of each residential quarter is the highest, and in the second set, the priority of each residential quarter is taken second place, and in the 3rd set, the priority of each residential quarter is minimum.
13. equipment as claimed in claim 12 is characterized in that, described distribution module specifically is used for:
For a set,, near to order far away sorted in the adjacent area of each residential quarter according to distance; Determine each residential quarter and top n adjacent area apart from sum, wherein N is positive integer; According to the larger order of the less priority of distance sum, determine the priority of each residential quarter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010612371 CN102026169B (en) | 2010-12-29 | 2010-12-29 | Method and equipment for distributing physical cell ID |
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| CN 201010612371 CN102026169B (en) | 2010-12-29 | 2010-12-29 | Method and equipment for distributing physical cell ID |
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| Publication Number | Publication Date |
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| CN102026169A CN102026169A (en) | 2011-04-20 |
| CN102026169B true CN102026169B (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010612371 Active CN102026169B (en) | 2010-12-29 | 2010-12-29 | Method and equipment for distributing physical cell ID |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2929709B1 (en) * | 2012-12-04 | 2017-06-14 | Nokia Solutions and Networks Oy | Algorithm for physical cell identifier allocation |
| CN103747445B (en) * | 2014-01-27 | 2017-10-03 | 上海大唐移动通信设备有限公司 | A kind of method and apparatus for distributing Physical Cell Identifier |
| CN104065600B (en) * | 2014-06-05 | 2017-12-26 | 京信通信系统（中国）有限公司 | A kind of method and device for suppressing control channel interference |
| CN106612502B (en) * | 2015-10-22 | 2019-11-12 | 普天信息技术有限公司 | A kind of acquisition methods and system of Physical Cell Identifier PCI |
| CN107241735B (en) * | 2016-03-29 | 2020-04-14 | 大唐移动通信设备有限公司 | Physical cell mark distribution method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8050225B2 (en) * | 2007-05-21 | 2011-11-01 | Qualcomm Incorporated | Assignment of primary and secondary synchronization code sequences to cells in a wireless communication system |
| CN101778395B (en) * | 2010-01-08 | 2012-05-23 | 华为技术有限公司 | Method and device for planning physical cell identities |
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