CN102045732B - Physical cell identity planning method and device - Google Patents
Physical cell identity planning method and device Download PDFInfo
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- CN102045732B CN102045732B CN200910204361.7A CN200910204361A CN102045732B CN 102045732 B CN102045732 B CN 102045732B CN 200910204361 A CN200910204361 A CN 200910204361A CN 102045732 B CN102045732 B CN 102045732B
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Abstract
The invention discloses a physical cell identity (PCI) planning method and a physical cell identity planning device, which are applied in a long term evolution (LTE) wireless network and used for solving the problem how to meet the requirements of no confusion and no conflict of PCI multiplexing of a service cell in a process of distributing the PCI to the service cell in the prior art. The method comprises the following steps of: acquiring physical position information and corresponding PCI information of each planned cell in an administration area by an operation administration and maintenance (OAM) system; determining whether the planned PCI range has nonuse PCI according to the acquired PCI information of the each planned cell; and when the planned PCI in the PCI range is used, determining the PCI of a cell to be planned according to the acquired physical position information and the stored physical position information of the cell to be planned and transmitting the determined PCI by the OAM system.
Description
Technical field
The present invention relates to radio network technique field, particularly a kind of method planned of physical cell identity and device.
Background technology
Physical cell identity (PCI, or Phy-CID, Physical Cell Identity) be Long Term Evolution (LTE, Long Term Evolution) a system small area important mark in the wireless network, wireless network needs the community coming discriminating measurement and reporting measurement reports according to multiplexing physical cell identity.If all PCI in the region, adjacent area of Serving cell is unique, so, according to the community PCI that measurement report is reported, just can determine that the metrical information of reporting is the metrical information of which community, otherwise just may be difficult to determine that the metrical information of reporting is the metrical information of which community, thus bring problem.
In the current LTE communication network planning, PCI generally only has 504, when the network planning, the PCI value of all adjacent areas of certain community must be made different all with it, namely must ensure that all adjacent area PCI of certain community do not conflict, also certain non-community closed subscriber group cells (CSG must be ensured, Close SubscriberGroup) the PCI value of any two non-CSG adjacent areas different, namely must ensure that any two non-CSG adjacent area PCI of certain non-community closed subscriber group cells do not obscure.
The PCI of Serving cell needs to distribute by planning, at present, the method of distributing PCI to Serving cell is all generally the PCI that the method manually planned by network planning person arranges Serving cell, comprise: network planning person's accounting base-station (eNB, evolved NodeBs) PCI of local all Serving cells planned, and artificial investigation PCI conflict and PCI confusion phenomenon, like this, network planning person's working strength is very large, and the differ all PCI conflicts of accurate investigation surely and PCI confusion phenomenon, thus, the existing side to Serving cell distribution PCI accurately can not meet Serving cell PCI without obscuring and conflict free requirement.
Summary of the invention
A kind of method that the embodiment of the present invention provides physical cell identity to plan and device, distribute in the process of PCI to Serving cell in order to solve in prior art, how to meet the multiplexing nothing of Serving cell PCI and obscure and the problem of conflict free requirement.
A kind of method that the embodiment of the present invention provides physical cell identity to advise, is applied in LTE wireless network, comprises:
Operation & Maintenance System obtains local each physical location information having planned community, and the physical cell identity information of correspondence;
According to each physical cell identity information having planned community obtained, determine whether there is untapped physical cell identity in the physical cell identity scope planned;
When physical cell identity in the physical cell identity scope of described planning is all by use, described Operation & Maintenance System is according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the physical cell identity of described community to be planned, and issue the described physical cell identity determined.
The device that the embodiment of the present invention provides a kind of physical cell identity to plan, is applied in LTE wireless network, comprises:
Acquiring unit, for obtaining local each physical location information having planned community, and the physical cell identity information of correspondence;
Determining unit, for according to each physical cell identity information having planned community obtained, determines whether there is untapped physical cell identity in the physical cell identity scope planned;
First planning unit, for when the physical cell identity in the physical cell identity scope of described planning is all by use, according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the physical cell identity of described community to be planned, and issue the described physical cell identity determined.
Operation & Maintenance System in the LTE wireless network that the embodiment of the present invention provides obtains local each physical location information having planned community, and the physical cell identity information of correspondence, according to each physical cell identity information having planned community obtained, determine whether there is untapped physical cell identity in the physical cell identity scope planned, when physical cell identity in the physical cell identity scope of described planning is all by use, described Operation & Maintenance System is according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the physical cell identity of described community to be planned, and issue the described physical cell identity determined, like this, Operation & Maintenance System can give cell allocation PCI to be planned automatically, and when realizing PCI to greatest extent and being multiplexing, meet community PCI without obscuring and conflict free requirement.
Accompanying drawing explanation
Fig. 1 is PCI planning flow chart in the embodiment of the present invention;
Fig. 2 is the flow chart of the PCI determining community to be planned in the embodiment of the present invention;
Fig. 3 is the position view of Nei57Ge community in administrative area in the embodiment of the present invention;
Fig. 4 is PCI planning flow chart in the embodiment of the present invention one;
Fig. 5 is PCI planning flow chart in the embodiment of the present invention two;
Fig. 6 is the result figure of PCI device for planning in the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention is in LTE wireless network planning process, there is multiple Serving cell in eNB institute in administrative area, Operation and Maintenance (OAM, Operation Administration and Maintenance) system according to the physical location information having distributed each community of PCI in eNB institute administrative area, can determine the PCI of community to be planned.See in Fig. 1, LTE wireless network planning process, PCI planning process comprises:
Step 101: obtain local each physical location information having planned community, and the PCI information of correspondence.
OAM system, when planning the PCI of community to be planned, must obtain each physical location information having planned community in eNB institute administrative area.Here, when the network planning, be written in eNB by the physical location information of each community, namely eNB saves each physical location information having planned community, and therefore, OAM can directly from eNB, obtain planned the physical location information of each community.Meanwhile, when also obtaining planning, it is the PCI information of each cell allocation.
Certainly, each physical location information having planned community, and the physical cell identity information of correspondence also can directly be write in OAM system.
Step 102: according to each PCI information having planned community obtained, determines whether there is untapped PCI in the PCI scope planned, if there is untapped PCI, then performs step 103, otherwise, perform step 104.
When LTE wireless network planning, preset a PCI scope, namely planned PCI scope, like this, OAM saves the PCI scope of planning, by each PCI having planned community obtained, with planned that PCI scope is compared, when planning PCI scope in have untapped PCI, then perform step 103, otherwise, perform step 104.
Such as: the PCI scope of planning is 1-5, when in the PCI information obtained, PCI value comprises: 1,3,4,5, has untapped PCI in the PCI scope of so obviously planning, then perform step 103; When in the PCI information obtained, PCI value I comprises: two 1, three 2, one 3, one 4, and one 5, there is no untapped PCI in the PCI scope of so obviously planning, then perform step 104.
Step 103: determine that a untapped PCI is the PCI of community to be planned, and proceed to execution step 105.
OAM system, from untapped PCI, selects a PCI to be the PCI of community to be planned, and can arbitrary selection PCI be the PCI of community to be planned, also can be the PCI of community to be planned according to setting select progressively PCI.
Step 104: planned community physical location information according to each of acquisition, and the physical location information of the community to be planned of preserving, determine the PCI of community to be planned, and proceed to execution step 105.
The physical location information of community to be planned has been saved in OAM system, and also obtain in a step 101 and eachly planned community physical location information, like this, OAM system can according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the physical cell identity of described community to be planned.
Step 105:OAM system issues the PCI of the community to be planned determined to eNB.
Certainly, in the embodiment of the present invention, for carrying out PCI planning next time, OAM system needs the geographical location information knowing administered community.
In above-described embodiment in step 104, plan community physical location information according to each of acquisition, and the physical location information of the community to be planned of preserving, determine that the detailed process of the PCI of community to be planned see Fig. 2, can comprise:
Step 201: determine that a PCI is the candidate PCI of community to be planned from the PCI scope of planning.
Here, can first according to each distance having planned the distance of community and community to be planned, determine to be the candidate cell physical label of community to be planned apart from the community to be planned physical cell identity planning community farthest.
Certainly, can be also the candidate PCI of community to be planned from Stochastic choice PCI within the scope of the PCI of planning.
Step 202: planned community and community to be planned from each, is that the community of candidate PCI is defined as the first community by PCI, other communities is defined as the second community.
Here, search each PCI having planned community, when the PCI found is identical with candidate PCI, determine that the community that this PCI is corresponding is the first community, other communities are the second community.Such as: candidate PCI is 2, in all communities of namely having planned, PCI be 2 community be the first community, PCI is the community of other values is the second community.
The PCI of community to be planned is candidate PCI temporarily, and therefore, community to be planned is also the first community.
Step 203: according to the physical location information obtained, determine the first distance between every two the first communities.
According to the physical location information of each first community, the first distance between every two the first communities can be calculated.
Step 204: each first distance compared with the first thresholding, when all first distances are all greater than the first thresholding, performs step 206, otherwise, perform step 205.
Here the first thresholding is conflict thresholding, be and ensure that all adjacent area PCI of community do not conflict and the thresholding that sets, when all first distances are greater than the first thresholding, then, show that all adjacent area PCI of community to be planned do not conflict, perform step 206, otherwise, community to be planned has adjacent area to there occurs PCI conflict, performs step 205.
Step 205: judge in the PCI scope planned, whether each PCI has been candidate PCI, if not, then return step 201, again determine that a PCI is the candidate PCI of community to be planned from the PCI scope of planning.If each PCI has been candidate PCI in the PCI scope of planning, then, can not determine the PCI of community to be planned, this PCI planning process has terminated.
Step 206: determine that second community is current second community, and according to the physical location information obtained, determine the second distance between current second community and each first community.
Obtain and eachly planned community physical location information, and the physical location information of community to be planned, therefore, also the physical location information of each second community is just obtained, and the physical location information of each first community, like this, the second distance between arbitrary second community and each first community can be calculated.
Step 207: each second distance and the second thresholding are compared, and the number of times adding up that second distance is less than the second thresholding.
Here, the second thresholding is for obscuring thresholding, and the different and thresholding of setting of the PCI value being any two the non-CSG adjacent areas ensureing CSG, compares each second distance and the second thresholding, add up the number of times that second distance is less than the second thresholding.
Step 208: the number of times obtain statistics and setting value compare, when adding up the number of times obtained and being less than setting value, will perform step 209, otherwise, return step 205.
Here, setting value is generally 2, when adding up the number of times obtained and being less than 2, then shows that the PCI value of any two non-CSG adjacent areas of the CSG of current second community is different, therefore, aliasing can not occur, perform step 209; When adding up the number of times that obtains and being more than or equal to 2, then the PCI value of two non-CSG adjacent areas may be had identical in the CSG of current second community, easily cause aliasing, therefore, return step 205.
Step 209: judge whether that the second all communities has been current second community all, if so, then perform step 210, otherwise, return step 206.
If the second all communities is all calculated and second distance between each first community, the second namely all communities has been current second community all, then, perform step 210, otherwise, return step 206, until the second all communities has been current second community all.
Step 210: PCI candidate PCI being defined as community to be planned.
Here, when the PCI of community to be planned is candidate PCI, can meet in planned range, Serving cell PCI is without obscuring and conflict free requirement, and therefore, OAM system determines that the process of the PCI of community to be planned terminates.
In embodiments of the present invention, in the PCI scope of planning, each PCI has been candidate PCI, and still can not determine the PCI of community to be planned, that can lower the first thresholding, or lowers the second thresholding, or increases the PCI scope of planning; Also can lower the first thresholding and the second thresholding simultaneously, and increase the PCI scope of planning; Can also be lower the first thresholding and the second thresholding, the PCI scope of planning be constant simultaneously.Namely the first thresholding can be lowered, and/or, lower the second thresholding, and/or, increase the PCI scope of planning, then re-start the PCI planning of community to be planned.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
Embodiment one, see Fig. 3, in LTE wireless network planning process, planning locally has 57 Serving cells, the PCI scope of planning is 1-7, and conflict thresholding is 1440 meters, and obscuring thresholding is 576 meters, suppose that these communities are distributed on the eNB of 19 three sectors, and suppose that the adjacent area of eating dishes without rice or wine is exactly geographical adjacent area.
On Fig. 3, the community of existing PCI numerical value is for plan community, and open wireless transmission, normally work, now community to be planned and community 1 power on, and distributes PCI to OAM system request.Process see Fig. 4, OAM systems organization PCI is as follows, comprising:
Step 401:OAM system obtains the geographical location information of existing community and corresponding PCI information.
Here, OAM system obtains Fig. 3 and is marked with the geographical location information of the community of PCI and corresponding PCI information, not containing the community of the PCI do not opened.The cell number indicating PCI is: 3/44/40/2/5/21/6/41, OAM system obtains the geographical location information of these communities and corresponding PCI information respectively.
Step 402:OAM system, according to the PCI information obtained, adds up PCI the number used.
Except PCI=3 uses twice in Fig. 3, other is all use once.
Step 403: the PCI scope of planning is the PCI that used of 1-7, OAM system according to statistics, determines that all PCI are previously used.
Step 404: the candidate PCI determining a GePCIWei community 1 from the PCI scope of planning.
Here, according to community 1 with the distance between other community, according to from as far as nearly sequence, the candidate PCI of a GePCIWei community 1 is determined.
Under original state, distance community 1 farthest community is Cell 3, and its PCI value is also 3, then can determine that candidate PCI is 3.
Step 405: determine that PCI be the community of candidate PCI is the first community, other communities are the second community.
When the PCI of candidate is 3, then Cell 1, Cell 3 and Cell 44 is the first community, and Cell 40, Cell 2, Cell 5, Cell 21, Cell 6 and Cell 41 is the second community.
Step 406: calculate the first distance between every two the first communities.
When the first community comprises: when Cell 1, Cell 3 and Cell 44, calculate the phase mutual edge distance between them.
Step 407: each first distance compared with the thresholding that conflicts, when all first distances are all greater than conflict thresholding, performs step 409, otherwise, perform step 408.
Here, when the PCI of candidate is 3, when conflict thresholding is 1440 meters, the distance between Cell1-Cell44 and Cell3-Cell44 is just greater than equaling the thresholding that conflicts, and Cell1-Cell3, especially much larger than this thresholding, therefore, performs step 409.If the distance between Cell1-Cell44 is just less than conflict thresholding, then perform step 408.
Step 408: judge in the PCI scope planned, whether each PCI has been candidate PCI, if not, then return step 404, again determine the candidate PCI of a GePCIWei community 1 from the PCI scope of planning.If each PCI has been candidate PCI in the PCI scope of planning, then, can not determine the PCI of community 1, this PCI planning process has terminated.
When also having PCI not to be defined as candidate PCI in PCI scope, then returning step 404, again determining the candidate PCI of a GePCIWei community 1 from the PCI scope of planning, still according to from as far as nearly sequence, the candidate PCI of a GePCIWei community 1 can be determined.Such as, the community far away apart from community 1 second is Cell 6, and its PCI value is also 6, then can determine that candidate PCI is 6.
Step 409: determine that second community is current second community, and according to the physical location information obtained, determine the second distance between current second community and each first community.
If Cell 40, Cell 2, Cell 5, Cell 21, Cell 6 and Cell 41 is the second community, then from Cell 40, Cell 2, Cell 5, Cell 21, Cell 6 and Cell 41, select arbitrary community to be current second community, then calculate the second distance between current second community and each first community.
Here, if select Cell 40 to be current second community, then calculate Cell 40-Cell 1, Cell40-Cell 3 respectively, and the second distance between Cell 40-Cell 44.
Step 410: by each second distance with obscure thresholding and compare, and add up second distance and be less than the number of times obscuring thresholding.
Obscuring thresholding is 576 meters, if select Cell 40 to be current second community, then by Cell 40-Cell 1, Cell 40-Cell 3, and the second distance between Cell 40-Cell 44 compares with 576 meters respectively, and statistics second distance is less than the number of times obscuring thresholding.
Step 411: when adding up the number of times obtained and being less than 2, perform step 412, otherwise, return step 404.
When adding up the number of times obtained and being less than 2, then show that the PCI value of any two non-CSG adjacent areas of the CSG of current second community is different, aliasing can not occur, perform step 412.
When adding up the number of times obtained and being more than or equal to 2, the PCI value of two non-CSG adjacent areas may be had identical in the CSG of then current second community, easily cause aliasing, therefore, return step 404, again determine the candidate PCI of a GePCIWei community 1 from the PCI scope of planning.
Step 412: judge whether that the second all communities has been current second community, if so, then perform step 413, otherwise, return step 409.
If the second all communities is all calculated and second distance between each first community, the second namely all communities has been current second community all, then, perform step 413, otherwise, return step 409, until the second all communities has been current second community all.
Step 413: PCI candidate PCI being defined as community 1.
Here, when the PCI of community 1 is candidate PCI, can meet in planned range, Serving cell PCI is without obscuring and conflict free requirement, and therefore, OAM system determines that the PCI of community 1 is candidate PCI.
Step 414:OAM system issues the PCI of the community 1 determined to eNB.This PCI planning process terminates.
In above-described embodiment one, in the PCI scope of planning, each PCI has been candidate PCI, still can not determine the PCI of community to be planned, then can lower conflict thresholding, and/or, lower and obscure thresholding, and/or, increase the PCI scope of planning.Then the PCI planning process of community 1 is restarted.
Embodiment two: see Fig. 3, in LTE wireless network planning process, planning locally has 57 Serving cells, the PCI scope of planning is 1-9, conflict thresholding is 1440 meters, obscuring thresholding is 576 meters, supposes that these communities are distributed on the eNB of 19 three sectors, and supposes that the adjacent area of eating dishes without rice or wine is exactly geographical adjacent area.
On Fig. 3, wireless transmission is opened in the community of existing PCI numerical value, and normally work, now community 1 powers on, and distributes PCI to OAM system request.Process see Fig. 5, OAM systems organization PCI is as follows, comprising:
Step 501:OAM system obtains the geographical location information of existing community and corresponding PCI information.
Here, OAM system obtains Fig. 3 and is marked with the geographical location information of the community of PCI and corresponding PCI information, not containing the community of the PCI do not opened.The cell number indicating PCI is: 3/44/40/2/5/21/6/41, OAM system obtains the geographical location information of these communities and corresponding PCI information respectively.
Step 502:OAM system, according to the PCI information obtained, adds up PCI the number used.
Except PCI=3 uses twice, PCI=1,2,4,5,6 and 7 to be use once in Fig. 3.
Step 503: the PCI scope of planning is the PCI that used of 1-9, OAM system according to statistics, determines that PCI=8/9 is not previously used.
Step 504: determine that not used PCI is the PCI of community 1.
PCI=8/9 is not previously used, and therefore, can the PCI of arbitrary selection community 1 be 8, or be 9, also can determine that the PCI of community 1 is 8 according to size order.
Step 505:OAM system issues the PCI of the community 1 determined to eNB.。
According to the method that above-mentioned physical cell identity is planned, the device of a kind of physical cell identity planning can be constructed, in the OAM system of this application of installation in LTE wireless network, see Fig. 6, this device comprises: acquiring unit 100, determining unit 200 and the first planning unit 300.Wherein,
Acquiring unit 100, for obtaining local each physical location information having planned community, and the physical cell identity information of correspondence.
Determining unit 200, for according to each physical cell identity information having planned community obtained, determines whether there is untapped physical cell identity in the physical cell identity scope planned.
First planning unit 300, for when the physical cell identity in the physical cell identity scope of described planning is all by use, according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the physical cell identity of described community to be planned, and issue the described physical cell identity determined.
Certainly, in the embodiment of the present invention, this device also comprises: the second planning unit, for when have in the physical cell identity scope of described planning not by use physical cell identity time, from the physical cell identity scope of described planning, determine that a untapped physical cell identity is the physical cell identity of community to be planned, and issue the described physical cell identity determined.
First planning unit 300 can comprise: candidate cell physical label determination subelement, cell ID subelement, and the first distance determines subelement, second distance determination subelement, statistics subelement, the first judgment sub-unit and physical cell identity determination subelement.
Candidate cell physical label determination subelement, for determining that from the physical cell identity scope of described planning a physical cell identity is the candidate cell physical label of community to be planned.
Cell ID subelement, for having planned in community and community to be planned by each, physical cell identity has been that the community of candidate cell physical label is defined as the first community, and other communities are defined as the second community.
First distance determines subelement, for the physical location information according to acquisition, and the physical location information of the community to be planned of preserving, determine the first distance between every two the first communities, each first distance is compared with the first thresholding.
Second distance determination subelement, for when all first distances are greater than the first thresholding, determine that second community is current second community, and according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the second distance between current second community and each first community.
Statistics subelement, for each second distance and the second thresholding being compared, and adds up the number of times that second distance is less than the second thresholding.
First judgment sub-unit, for when adding up the number of times obtained and being less than setting value, judges whether that the second all communities has been current second community all.
Physical cell identity determination subelement, for when the second all communities has been current second community all, has been defined as the physical cell identity of community to be planned by candidate cell physical label.
In the embodiment of the present invention, the first planning unit also comprises:
Second judgment sub-unit, for judging that in the physical cell identity scope planned, whether each physical cell identity has been candidate cell physical label.
Amendment subelement, for being candidate cell physical label when each physical cell identity in the physical cell identity scope determining described planning, has then lowered the first thresholding; And/or, lower the second thresholding; And/or, increase the physical cell identity scope of planning.
And candidate cell physical label determination subelement, also for according to each distance having planned the spacing of community and community to be planned, determine to be the candidate cell physical label of community to be planned apart from the community to be planned physical cell identity planning community farthest.
Certainly, candidate cell physical label determination subelement, can also be used for, from the physical cell identity scope of planning, determining that a physical cell identity is the candidate cell physical label of community to be planned.
In sum, in the embodiment of the present invention, OAM system is according to local each physical location information having planned community, and the physical location information of community to be planned, automatically determine the physical cell identity of community to be planned, and issue the physical cell identity determined to eNB, and by the distance of local minizone and the first thresholding, and second comparison of thresholding, realize to greatest extent PCI multiplexing while, reduce the probability that community PCI conflicts and obscures to greatest extent.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the claims in the present invention and equivalent technologies thereof to these amendments of the present invention and modification, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a method for physical cell identity planning, is characterized in that, be applied in Long Term Evolution LTE wireless network, comprise:
Operation & Maintenance System obtains local each physical location information having planned community, and the physical cell identity information of correspondence;
According to each physical cell identity information having planned community obtained, determine whether there is untapped physical cell identity in the physical cell identity scope planned;
When physical cell identity in the physical cell identity scope of described planning is all by use, described Operation & Maintenance System has planned community physical location information according to each of acquisition, and the physical location information of the community to be planned of preserving, determine the physical cell identity of described community to be planned, and issue the described physical cell identity determined;
Wherein, according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine that the physical cell identity of described community to be planned comprises the following steps:
A, determine that a physical cell identity is the candidate cell physical label of community to be planned from the physical cell identity scope of described planning;
B, planned in community and community to be planned by each, physical cell identity is that the community of candidate cell physical label is defined as the first community, and other communities are defined as the second community;
C, according to obtain physical location information, and the physical location information of the community to be planned of preserving, determine the first distance between every two the first communities, each first distance is compared with the first thresholding, when all first distances are greater than the first thresholding, perform step D, otherwise, return steps A;
D, determine that second community is current second community, and according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the second distance between current second community and each first community;
E, each second distance and the second thresholding to be compared, and add up the number of times that second distance is less than the second thresholding, when adding up the number of times obtained and being less than setting value, perform step F, otherwise, return steps A;
F, judge whether the second all communities all for current second community, if so, candidate cell physical label is defined as the physical cell identity of community to be planned, otherwise, return step D.
2. the method for claim 1, is characterized in that, have in the physical cell identity scope of described planning not by use physical cell identity time, described method also comprises:
From the physical cell identity scope of described planning, determine that a untapped physical cell identity is the physical cell identity of community to be planned, and issue the described physical cell identity determined.
3. the method for claim 1, is characterized in that, before described execution steps A, also comprises:
Judge in the physical cell identity scope planned, whether each physical cell identity has been candidate cell physical label;
When each physical cell identity in the physical cell identity scope determining described planning has been candidate cell physical label, then lower the first thresholding; And/or, lower the second thresholding; And/or, increase the physical cell identity scope of planning.
4. the method for claim 1, is characterized in that, described steps A comprises:
According to each distance having planned the spacing of community and community to be planned, determine to be the candidate cell physical label of community to be planned apart from the community to be planned physical cell identity planning community farthest; Or,
From the physical cell identity scope of planning, determine that a physical cell identity is the candidate cell physical label of community to be planned.
5. a device for physical cell identity planning, is characterized in that, be applied in Long Term Evolution LTE wireless network, comprise:
Acquiring unit, for obtaining local each physical location information having planned community, and the physical cell identity information of correspondence;
Determining unit, for according to each physical cell identity information having planned community obtained, determines whether there is untapped physical cell identity in the physical cell identity scope planned;
First planning unit, for when the physical cell identity in the physical cell identity scope of described planning is all by use, according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the physical cell identity of described community to be planned, and issue the described physical cell identity determined;
Wherein, described first planning unit comprises:
Candidate cell physical label determination subelement, for determining that from the physical cell identity scope of described planning a physical cell identity is the candidate cell physical label of community to be planned;
Cell ID subelement, for having planned in community and community to be planned by each, physical cell identity has been that the community of candidate cell physical label is defined as the first community, and other communities are defined as the second community;
First distance determines subelement, for the physical location information according to acquisition, and the physical location information of the community to be planned of preserving, determine the first distance between every two the first communities, each first distance is compared with the first thresholding;
Second distance determination subelement, for when all first distances are greater than the first thresholding, determine that second community is current second community, and according to the physical location information obtained, and the physical location information of the community to be planned of preserving, determine the second distance between current second community and each first community;
Statistics subelement, for each second distance and the second thresholding being compared, and adds up the number of times that second distance is less than the second thresholding;
First judgment sub-unit, for when adding up the number of times obtained and being less than setting value, judges whether that the second all community persons has been current second community;
Physical cell identity determination subelement, for when the second all communities has been current second community all, has been defined as the physical cell identity of community to be planned by candidate cell physical label.
6. device as claimed in claim 5, is characterized in that, also comprise:
Second planning unit, for when have in the physical cell identity scope of described planning not by use physical cell identity time, from the physical cell identity scope of described planning, determine that a untapped physical cell identity is the physical cell identity of community to be planned, and issue the described physical cell identity determined.
7. device as claimed in claim 5, it is characterized in that, described first planning unit also comprises:
Second judgment sub-unit, for judging that in the physical cell identity scope planned, whether each physical cell identity has been candidate cell physical label;
Amendment subelement, for being candidate cell physical label when each physical cell identity in the physical cell identity scope determining described planning, has then lowered the first thresholding; And/or, lower the second thresholding; And/or, increase the physical cell identity scope of planning.
8. device as claimed in claim 5, is characterized in that,
Described candidate cell physical label determination subelement, also for according to each distance having planned the spacing of community and community to be planned, determine to be the candidate cell physical label of community to be planned apart from the community to be planned physical cell identity planning community farthest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910204361.7A CN102045732B (en) | 2009-10-19 | 2009-10-19 | Physical cell identity planning method and device |
Applications Claiming Priority (1)
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| CN102740300B (en) * | 2012-06-29 | 2019-02-26 | 中兴通讯股份有限公司 | The auto-allocation method and device of physical-layer cell identifier |
| CN102869022A (en) * | 2012-08-21 | 2013-01-09 | 中兴通讯股份有限公司 | Method and device for allocating physical cell identifiers (PCIs) of wireless network |
| CN103874150A (en) * | 2012-12-17 | 2014-06-18 | 华为技术有限公司 | Cell switching method, base station and user equipment (UE) |
| CN105516992B (en) * | 2015-12-14 | 2018-12-14 | 中通服建设有限公司 | A kind of PCI planing method of LTE network |
| 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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