CN113810915B - Physical cell identification code generation method and device and electronic equipment - Google Patents

Physical cell identification code generation method and device and electronic equipment Download PDF

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Publication number
CN113810915B
CN113810915B CN202010548423.2A CN202010548423A CN113810915B CN 113810915 B CN113810915 B CN 113810915B CN 202010548423 A CN202010548423 A CN 202010548423A CN 113810915 B CN113810915 B CN 113810915B
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pci
base station
target base
cell
generating
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CN113810915A (en
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郭建光
徐生瑜
王超
薛云山
彭鹏
吕晨光
朱瑞霞
赵静
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China Mobile Communications Group Co Ltd
China Mobile Group Design Institute Co Ltd
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China Mobile Communications Group Co Ltd
China Mobile Group Design Institute Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/18—Network planning tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a PCI generation method, a PCI generation device and electronic equipment, wherein the method comprises the following steps: judging whether a target base station to be planned is co-located with a base station of a previous generation network; if a base station of a previous generation network co-located with the target base station exists, generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in a preset concentric ring array, wherein the concentric ring array consists of a plurality of concentric rings divided by a circle containing an area to be planned. According to the PCI generation method, the PCI generation device and the electronic equipment provided by the embodiment of the invention, the PCI of each cell of the base station to be planned is generated by combining the PCI of the cell of the previous generation network according to the position of the base station to be planned in the preset concentric ring array, so that the resource waste is avoided, and the intersystem interference is avoided.

Description

Physical cell identification code generation method and device and electronic equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for generating a physical cell identifier, and an electronic device.
Background
Physical Cell Id (PCI) is used to distinguish between different cells, each Cell having a PCI corresponding to it.
In the prior art, the fourth generation mobile communication technology (the 4th generation mobile communication technology,4G) long term evolution (Long Term Evolution, LTE) defines a total of 504 different PCI values, and each PCI corresponds to a specific downlink reference signal sequence. The set of all PCIs is divided into 168 groups, each group containing 3 cell identification codes (IDs). In LTE network planning, it is necessary to avoid that the values of PCI modulo (mod) 3, PCI mod6 and PCI mod 30 of neighboring cells are equal. From the physical layer, PCI is composed of primary synchronization signals (Primary Synchronization Signal, PSS) and secondary synchronization signals (Secondary Synchronization Signal, SSS) and can be obtained by the formula pci=pss+3 SSS operation. The specific PCI is determined by retrieving PSS and SSS in the LTE cell search procedure, in combination. The fifth generation mobile communication technology (the 5th generation mobile communication technology,5G) defines 1008 PCIs in total, and the system is divided into 336 groups by a mode 3, wherein the value range is 0-335, and each group comprises 3 cell IDs. The 5G NR PCI planning should follow the principles of non-collision, non-confusion and optimization.
However, since the 5G NR system has 1008 PCI codes, if the PCI planning of the 4G network is followed, the 5G NR system must have 504 PCI codes that cannot be used, resulting in PCI code resource waste, and the maximum PCI code resource multiplexing distance cannot be achieved. If PCI planning of the 4G network is not used, PCI planning of the 5G NR system is independently performed, and interference among the systems is introduced.
Disclosure of Invention
The embodiment of the invention provides a PCI generation method, a PCI generation device and electronic equipment, which are used for solving the technical problems in the prior art.
In a first aspect, an embodiment of the present invention provides a PCI generating method, including:
judging whether a target base station to be planned is co-located with a base station of a previous generation network;
if a base station of a previous generation network co-located with the target base station exists, generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in a preset concentric ring array, wherein the concentric ring array consists of a plurality of concentric rings divided by a circle containing an area to be planned.
Further, the generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in the preset concentric ring array specifically includes:
determining the serial number of the concentric ring where the target base station is located according to the longitude and latitude of the target base station; the concentric rings are numbered in turn from small to large or from large to small in radius in advance;
generating the PCI of each cell of the target base station based on the parity of the serial numbers of the concentric circles where the target base station is located and the PCI of the co-located base station.
Further, the generating the PCI of each cell of the target base station based on the parity of the number of the concentric ring where the target base station is located and the PCI of the co-located base station specifically includes:
if the number of the concentric rings where the target base station is located is even, generating the PCI of each cell of the target base station according to the PCI of the co-located base station, wherein the generated PCI of the cell of the target base station is equal to the PCI of the corresponding cell in the co-located base station;
if the number of the concentric rings where the target base station is located is an odd number, generating the PCI of each cell of the target base station according to the PCI of the co-located base station and a preset constant, wherein the generated value of the PCI of the cell of the target base station is equal to the value of the PCI of the corresponding cell in the co-located base station plus the preset constant.
Further, after determining whether the target base station to be planned is co-located with the base station of the previous generation network, the method further includes:
if the base station of the previous generation network co-located with the target base station does not exist, generating the PCI of each cell of the target base station based on the PCI new code set of the previous generation network and the position of the target base station in a preset concentric ring array.
Further, the generating the PCI of each cell of the target base station based on the PCI new code set of the previous generation network and the position of the target base station in the preset concentric ring array specifically includes:
determining the serial number of the concentric ring where the target base station is located according to the longitude and latitude of the target base station; the concentric rings are numbered in turn from small to large or from large to small in radius in advance;
generating the PCI of each cell of the target base station based on the parity of the serial numbers of the concentric rings where the target base station is located and the PCI new code set of the previous generation network.
Further, the generating the PCI of each cell of the target base station based on the parity of the number of the concentric ring where the target base station is located and the PCI new code set of the previous generation network specifically includes:
if the serial number of the concentric ring where the target base station is located is an odd number, generating the PCI of each cell of the target base station according to the PCI newly-built code set of the previous generation network;
if the number of the concentric rings where the target base station is located is even, determining a new PCI new code set according to the PCI new code set of the previous generation network, and generating the PCI of each cell of the target base station based on the new PCI new code set.
Further, the generating the PCI of each cell of the target base station according to the PCI new code set of the previous generation network specifically includes:
determining the PCI model 3 value of each cell in the target base station according to the azimuth angle of each cell of the target base station and the main direction angle of the PCI model 3 value corresponding to the target concentric ring; the target concentric ring is a concentric ring where the target base station is located; each concentric ring in the concentric ring array corresponds to a main direction angle of a group of PCI model 3 values;
generating the PCI of each cell of the target base station according to the PCI module 3 value of each cell in the target base station and the PCI new code set of the previous generation network, wherein the PCI of all the generated cells of the target base station is a group of PCI in the PCI new code set of the previous generation network, and the PCI of each cell is matched with the corresponding PCI module 3 value.
Further, the generating the PCI of each cell of the target base station based on the new PCI new code set specifically includes:
determining the PCI model 3 value of each cell in the target base station according to the azimuth angle of each cell of the target base station and the main direction angle of the PCI model 3 value corresponding to the target concentric ring; the target concentric ring is a concentric ring where the target base station is located; each concentric ring in the concentric ring array corresponds to a main direction angle of a group of PCI model 3 values;
Generating the PCI of each cell of the target base station according to the PCI module 3 value of each cell in the target base station and the new PCI new code set, wherein the generated PCI of all cells of the target base station is a group of PCI in the new PCI new code set, and the PCI of each cell is matched with the corresponding PCI module 3 value.
In a second aspect, an embodiment of the present invention provides a PCI generating device, including:
the judging module is used for judging whether the target base station to be planned is co-located with the base station of the previous generation network;
and the generation module is used for generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in a preset concentric ring array if the base station of the previous generation network co-located with the target base station exists, wherein the concentric ring array consists of a plurality of concentric rings which are formed by dividing a circle containing an area to be planned.
In a third aspect, an embodiment of the present invention provides an electronic device, including: the PCI generating method comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the steps of the PCI generating method provided in the first aspect when executing the computer program.
According to the PCI generation method, the PCI generation device and the electronic equipment provided by the embodiment of the invention, the PCI of each cell of the base station to be planned is generated by combining the PCI of the cell of the previous generation network according to the position of the base station to be planned in the preset concentric ring array, so that the resource waste is avoided, and the intersystem interference is avoided.
Drawings
FIG. 1 is a schematic diagram of a PCI generation method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a concentric circular array according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the distribution of parity quadrants of a torus according to an embodiment of the present invention;
FIG. 4 is a logic flow diagram of PCI generation for co-located base stations according to an embodiment of the present invention;
FIG. 5 is a logic flow diagram of PCI generation for a non-co-sited base station according to an embodiment of the present invention;
FIG. 6 is a statistical distribution diagram of principal direction angles of PCI model 3 values corresponding to concentric circles provided by an embodiment of the present invention;
FIG. 7 is a schematic diagram of a PCI generating device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The 4G era LTE defines a total of 504 different PCIs (ranging from 0 to 503), and each PCI corresponds to a specific downlink reference signal sequence. The set of all PCI's is divided into 168 groups (value ranges 0-167), each group containing 3 cell IDs (value ranges 0-2). In LTE network planning, it is necessary to avoid that the values of "PCI mod 3", "PCI mod 6", "PCI mod 30" of neighboring cells are equal. So-called "mode 3 interference", "mode 6 interference", "mode 30 interference" is avoided.
(1) If the values of PCI mod 3 of the adjacent cells are the same, the PSS of the adjacent cells are the same, which causes mutual interference of the PSS.
(2) In case of fixed time domain position, the downlink cell-specific reference signal has 6 frequency shifts (frequency shifts) in the frequency domain. If the PCI mod 6 values of the neighboring cells are the same, the positions of the downlink cell-specific reference signals in the frequency domain overlap, which causes mutual interference between the reference signals.
(3) Mode 30 interference: DMRS and SRS information are carried in the PUSCH channel, and these two reference signals are very important for channel estimation and demodulation. They consist of 30 basic ZC sequences, i.e. 30 different sequence combinations. If the PCI mod 30 values of the adjacent cells are the same, the same ZC sequence is used, and the mutual interference between the uplink DMRS and the SRS is caused.
In the 5G era, 1008 PCIs are defined in the 5G NR system, and the PCI is divided into 336 groups by adopting a mode 3, wherein the value range is 0-335, and each group comprises 3 cell IDs.
The 5G NR PCI planning should follow the following principle:
(1) Non-conflicting principles: ensuring the PCI difference between adjacent cells with the same frequency;
(2) No confusion principle: the PCI values of the same-frequency adjacent cells of a certain cell are ensured to be unequal, and the PCI value with optimal interference between the adjacent cells is selected as much as possible, namely, different PCI modules 3 and 30 are configured;
(3) Optimization principle: the cells with PCI are guaranteed to have enough multiplexing distance.
In the prior art, a main research object is a planning method and equipment of 504 PCI codes of an LTE network, wherein the main planning method mainly plans PCI to follow a principle of no conflict and no confusion, and two continuous PCI spaces are respectively divided from PCI resource segments, and one PCI space is used for distributing the PCI of a pico base station cell; the other is used for the distribution of the PCI of the macro base station cell, and the PCI space distributed to the macro base station cell is large enough to ensure that the PCI multiplexing distance of the macro base station cell is far enough, thereby deducing the PCI space adopted by the macro base station and expanding the reserved PCI resources. Wherein, the PCI multiplexing distance is far enough, which means that the number of loops of macro cell clusters which form enough macro base stations is multiplied by the cell diameter; a sufficiently large PCI space means that the number of allocable PCIs is at least equal to the total number of cells of a sufficient macro cell cluster, such that the probability of PCI collision with a micro cell is low. For example, the PCI space allocation method includes: allocating a continuous block of PCI space for a pico base station cell, ranging from 1 to 50; allocating a continuous PCI space with a range of 51-321 to a macro cell cluster base station cell; a continuous PCI space is reserved for the macro cell cluster base station, the range is 322-447, and capacity expansion is reserved for the macro cell cluster base station. The method can basically meet the requirements of collision and confusion of PCI, and partial researches consider the influences of PCI model 3 and model 6 to carry out relevant PCI planning, so that the serious interference between 4G network reference signals is avoided.
The scheme in the prior art mainly plans 504 PCI codes of a 4G LTE network, and achieves the purposes of no conflict and no confusion, and part of researches consider interference conditions of a mode 3 and a mode 6, but the planning of 1008 PCI codes of a 5G NR network, and the dissimilarity and association of PCI of the 5G NR network and PCI planning of the 4G network are not researched at present.
The prior art scheme is mainly realized by planning PCI codes of a 4G LTE network, wherein the LTE network only has 504 PCI codes, but a 5G NR network has 1008 PCI codes, if PCI planning equipment of the 4G network is used, the 504 PCI codes (504-1007) of the 5G network cannot be used, so that PCI code resources are wasted, and the maximum PCI code resource multiplexing distance cannot be realized; on the other hand, the PCI code deployment requirement of the 5G NR network is very similar to that of the 4G network, the 4G network is deployed for 7 years, the current network is fully optimized, the deployed PCI code of the current network maximally realizes the scientificity and rationality of deployment, and if the PCI code resource planning result of the current network 4G is not reasonably utilized, a great amount of manpower and material resources are re-planned and optimized again, and interference between the 4G LTE system and the 5G NR system is introduced.
Aiming at the defects, 1008 PCI codes are innovatively combined with the concentric ring array based on the concentric ring array to form a PCI ring array, and PCI code resource planning results of the existing network 4G network are combined with the PCI ring array, so that reasonable deployment of the PCI of the 5G NR network is realized, the maximum PCI code resource multiplexing distance is achieved, and the effects of saving manpower, material resources and time cost are further achieved, namely, resource waste is avoided, and inter-system interference is avoided.
Fig. 1 is a schematic diagram of a PCI generating method according to an embodiment of the present invention, and as shown in fig. 1, an embodiment of the present invention provides a PCI generating method, in which an execution body is a PCI generating device. The method comprises the following steps:
step S101, judging whether the target base station to be planned is co-located with the base station of the previous generation network.
Specifically, in the embodiment of the present invention, it is necessary to construct in advance a concentric circular ring array composed of m concentric circular rings divided by a circle containing the area S to be planned, C i Is the ith ring, and m is more than or equal to 2. The circle center of the concentric ring is P, the circle center P is taken as a reference point, and the longitude and latitude of P are (P Lo ，P La )，C i Is of width Deltad i 。
The circle containing the area S to be planned can be determined in two ways:
1. The circle containing the area S to be planned may be the minimum circumscribing circle of the area S to be planned, and satisfies the following formula:
0≤Δd i ≤R
wherein Δd i For the width of the ith ring, R is the radius of the smallest circumcircle of the area S to be planned, m is the number of concentric rings, i epsilon (1, 2..m), and m is more than or equal to 2.
And the value of m is calculated by the following equation:
wherein Δd i The width of the ith ring is the radius of the smallest circumcircle of the area S to be planned, m is the number of concentric rings, and m is more than or equal to 2.
2. The circle containing the area S to be planned is determined by if:
(1) Firstly, determining an external rectangle of the area S to be planned, wherein one edge of the external rectangle is geographically in the north-south direction or the east-west direction. The length and width of the external rectangle are respectively l 1 And l 2 。
(2) Then, a circumscribed circle of a circumscribed rectangle is made, and the circumscribed circle of the circumscribed rectangle is used as a circle containing the area S to be planned.
And satisfies the following formula:
wherein Δd i For the width of the ith ring, l 1 And l 2 The length and the width of the circumscribed rectangle of the area S to be planned are respectively, m is the number of concentric rings, and m is more than or equal to 2.
And the value of m is calculated by the following equation:
wherein Δd i For the width of the ith ring, l 1 And l 2 The length and the width of the circumscribed rectangle of the area S to be planned are respectively, m is the number of concentric rings, and m is more than or equal to 2.
Fig. 2 is a schematic diagram of a concentric ring array according to an embodiment of the present invention, as shown in fig. 2, in which m=4 is taken as an example, that is, the concentric ring array includes four concentric rings, and the area S to be planned is not shown in fig. 2.
After constructing the concentric ring array, it is necessary to determine whether the target base station to be planned currently is co-located with the base station of the previous generation network. And determining the PCI of each cell of the target base station by combining the concentric ring array according to the judging result.
And if the target base station to be planned currently is a 5G NR base station, the previous generation network is a 4G LTE network.
Step S102, if there is a base station of the previous generation network co-located with the target base station, generating PCI of each cell of the target base station based on PCI of the co-located base station and the position of the target base station in a preset concentric ring array, wherein the concentric ring array is formed by a plurality of concentric rings divided by a circle containing an area to be planned.
Specifically, after judging whether the target base station to be planned currently is co-located with the base station of the previous generation network, determining the PCI of each cell of the target base station according to the judging result by combining the concentric ring array.
If there is a base station of the previous generation network co-located with the target base station, generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in the preset concentric circular ring array.
Whether the base station of the previous generation network co-located with the target base station exists or not can be judged according to the longitude and latitude of the target base station, and the position of the base station in the preset concentric ring array is determined according to the longitude and latitude of the target base station.
According to the PCI generation method provided by the embodiment of the invention, the PCI of each cell of the base station to be planned is generated by combining the PCI of the cell of the previous generation network according to the position of the base station to be planned in the preset concentric ring array, so that the resource waste is avoided, and the intersystem interference is avoided.
Based on any one of the foregoing embodiments, further, the generating, based on the PCI of the co-located base station and the location of the target base station in the preset concentric ring array, the PCI of each cell of the target base station specifically includes:
determining the serial number of the concentric ring where the target base station is located according to the longitude and latitude of the target base station; the concentric rings are numbered in turn from small to large or from large to small in radius in advance;
generating the PCI of each cell of the target base station based on the parity of the serial numbers of the concentric circles where the target base station is located and the PCI of the co-located base station.
Specifically, in the embodiment of the present invention, based on the PCI of the co-located base station and the position of the target base station in the preset concentric ring array, the specific steps for generating the PCI of each cell of the target base station are as follows:
Firstly, determining the serial number of the concentric ring of the target base station according to the longitude and latitude of the target base station.
In the process of constructing the concentric ring array, a plurality of concentric rings are numbered in turn in order of radius from small to large or from large to small in advance, so that the parity quadrant attribute of each ring is constructed.
FIG. 3 is a schematic diagram showing the distribution of odd-even quadrants of a ring according to an embodiment of the present invention, wherein as shown in FIG. 3, a ring closest to the center P of the circle is defined, i.e. the ring with the smallest radius is the 1 st ring C 1 The ith ring is C, numbered in sequence from small to large in radius i The ring with the largest radius is the mth ring C m 。C 1 The region is a singular limit, C 2 The region is even limit, C 3 The area is an odd quadrant, and the odd-even quadrant attribute of each circular ring is constructed by the same way.
Definition a i1 Is C i Is a of small radius of (a) i2 Is C i Is included in the large radius of (a).
Definition a i3 Is C i Quadrant properties of a) i3 =0 represents C i Is even, whereas a i3 =1 represents C i Is a quadrant property of a quadrant, from which C can be calculated i Quadrant attribute a of the parity quadrant to which it belongs i3 =imod2, i e (1, 2..m), i being the number of the circle.
After the concentric ring array is constructed, the serial number of the concentric ring where the concentric ring array is positioned can be determined according to the longitude and latitude of the target base station.
Let longitude and latitude of the target base station be (B Lo ，B La ) The distance from the target base station to the reference point P is D (unit: meter), the longitude and latitude of the reference point P is (P) Lo ，P La ) D can be determined according to a formula for calculating the distance between any two points on the earth according to the longitude and latitude of the two points, wherein the formula is as follows:
D＝6371004*Arccos(sin(B La )*sin(P La )+cos(B La )*cos(P La )*cos(B Lo -P Lo ))*Pi/180
according to the distance D, C i Is a small radius of a i1 And C i Large radius a of (2) i2 The number of the concentric ring where the target base station is located. When a is i1 ＜D≤a i2 Then it is determined that the target base station is located at C i In the region, the number of the concentric ring where the target base station is located can be determined as i, and the quadrant attribute of the target base station can be further judged. If the number of the concentric circles where the target base station is located is an odd number, the quadrant attribute of the target base station is an odd quadrant; if the number of the concentric circles where the target base station is located is even, the quadrant attribute of the target base station is even.
Then, based on the parity of the number of the concentric ring where the target base station is located and the PCI of the co-located base station, the PCI of each cell of the target base station is generated.
According to the PCI generation method provided by the embodiment of the invention, the concentric rings are distinguished according to the parity of the numbers, and the PCI of each cell of the target base station with different quadrant attributes is generated in different modes, so that the intersystem interference is further avoided.
Based on any one of the foregoing embodiments, further, the generating the PCI of each cell of the target base station based on the parity of the number of the concentric ring where the target base station is located and the PCI of the co-located base station specifically includes:
if the number of the concentric rings where the target base station is located is even, generating the PCI of each cell of the target base station according to the PCI of the co-located base station, wherein the generated PCI of the cell of the target base station is equal to the PCI of the corresponding cell in the co-located base station;
if the number of the concentric rings where the target base station is located is an odd number, generating the PCI of each cell of the target base station according to the PCI of the co-located base station and a preset constant, wherein the generated value of the PCI of the cell of the target base station is equal to the value of the PCI of the corresponding cell in the co-located base station plus the preset constant.
Specifically, fig. 4 is a logic flow chart for generating PCI of a co-located base station according to an embodiment of the present invention, as shown in fig. 4, in the embodiment of the present invention, if the number of concentric circles where a target base station is located is even, that is, the quadrant attribute of the target base station is even, the PCI code of the cell of the target base station inherits the PCI code resource of the previous generation network where the target base station is co-located, that is, the PCI of the cell of the generated target base station is equal to the PCI of the corresponding cell in the co-located base station.
If the number of the concentric ring where the target base station is located is odd, that is, the quadrant attribute of the target base station is odd, the cell PCI code of the target base station increases a preset constant on the basis of the PCI code of the co-located previous generation network, that is, the value of the PCI of the generated cell of the target base station is equal to the value of the PCI of the corresponding cell in the co-located base station plus the preset constant.
The preset constant is determined by the actual network scenario.
For example, the total number of PCI codes of the 4G LTE network is 504, the 5G NR network plans 1008 PCI codes, and if the base station to be planned is a 5G NR base station, the preset constant is 504. Setting the cell PCI of 5G NR base station to be planned as PCI NR The cell PCI of the 4G LTE base station co-located with the base station is PCI 4G PCI (peripheral component interconnect) NR The calculation formula of (2) is as follows:
as shown in fig. 4, all co-located NR stations are polled, and in combination with the concentric ring array, the PCI code resource allocation situation of each cell of all 5G NR base stations co-located with the 4G LTE base station can be further calculated.
The PCI generating method provided by the embodiment of the invention distinguishes the concentric rings according to the parity of the numbers, the PCI of each cell of the base station in the even quadrant inherits the PCI code resource of the previous generation network, and a constant is added on the basis of the PCI code resource of the previous generation network of each cell of the base station in the odd quadrant, thereby further avoiding the inter-system interference.
Based on any one of the above embodiments, further, after determining whether the target base station to be planned is co-located with the base station of the previous generation network, the method further includes:
if the base station of the previous generation network co-located with the target base station does not exist, generating the PCI of each cell of the target base station based on the PCI new code set of the previous generation network and the position of the target base station in a preset concentric ring array.
Specifically, in the embodiment of the present invention, after determining whether the target base station to be planned currently is co-located with the base station of the previous generation network, the PCIs of each cell of the target base station are determined by combining the concentric ring array according to the determination result.
Each generation of network reserves two types of PCI code resources including PCI new code resources and PCI expansion code resources, wherein the set of PCI new code resources is also called PCI new code set or PCI new code resource pool, and the set of PCI expansion code resources is also called PCI expansion code set or PCI expansion code resource pool.
In the embodiment of the invention, if the base station of the previous generation network co-located with the target base station does not exist, generating the PCI of each cell of the target base station based on the newly created code set of the PCI of the previous generation network and the position of the target base station in the preset concentric ring array.
Whether the base station of the previous generation network co-located with the target base station exists or not can be judged according to the longitude and latitude of the target base station, and the position of the base station in the preset concentric ring array is determined according to the longitude and latitude of the target base station.
The PCI generating method provided by the embodiment of the invention is used for generating the PCI of each cell of the base station to be planned according to the position of the base station in the preset concentric ring array and the PCI newly-built code set of the previous generation network aiming at the base station to be planned which is not co-located, thereby avoiding resource waste and inter-system interference.
Based on any one of the foregoing embodiments, further, the generating, based on the new PCI code set of the previous generation network and the position of the target base station in the preset concentric ring array, the PCI of each cell of the target base station specifically includes:
determining the serial number of the concentric ring where the target base station is located according to the longitude and latitude of the target base station; the concentric rings are numbered in turn from small to large or from large to small in radius in advance;
generating the PCI of each cell of the target base station based on the parity of the serial numbers of the concentric rings where the target base station is located and the PCI new code set of the previous generation network.
Specifically, in the embodiment of the present invention, based on the PCI new code set of the previous generation network and the position of the target base station in the preset concentric ring array, the specific steps for generating the PCI of each cell of the target base station are as follows:
firstly, determining the serial number of the concentric ring of the target base station according to the longitude and latitude of the target base station.
The specific method for determining the number of the concentric ring where the target base station is located according to the longitude and latitude of the target base station is the same as that in the above embodiment, and will not be described here again.
And generating the PCI of each cell of the target base station based on the parity of the serial numbers of the concentric rings where the target base station is located and the PCI new code set of the previous generation network.
According to the PCI generation method provided by the embodiment of the invention, the concentric rings are distinguished according to the parity of the numbers, and the PCI of each cell of the target base station with different quadrant attributes is generated in different modes, so that the intersystem interference is further avoided.
Based on any one of the foregoing embodiments, further, the generating the PCI of each cell of the target base station based on the parity of the number of the concentric ring where the target base station is located and the PCI new code set of the previous generation network specifically includes:
If the serial number of the concentric ring where the target base station is located is an odd number, generating the PCI of each cell of the target base station according to the PCI newly-built code set of the previous generation network;
if the number of the concentric rings where the target base station is located is even, determining a new PCI new code set according to the PCI new code set of the previous generation network, and generating the PCI of each cell of the target base station based on the new PCI new code set.
Specifically, fig. 5 is a logic flow chart for generating PCIs of a non-co-located base station according to an embodiment of the present invention, as shown in fig. 5, in the embodiment of the present invention, if the number of concentric circles where a target base station is located is odd, that is, the quadrant attribute of the target base station is singular, PCIs of each cell of the target base station are generated according to a PCI new code set of a previous generation network, that is, a group of PCIs is are selected from the PCI new code set of the previous generation network as PCIs of each cell of the target base station.
If the number of the concentric circles where the target base station is located is even, that is, the quadrant attribute of the target base station is even, determining a new PCI new code set according to the PCI new code set of the previous generation network, and generating the PCI of each cell of the target base station based on the new PCI new code set, that is, selecting a group of PCI from the new PCI new code set as the PCI of each cell of the target base station.
The specific manner of determining the new PCI new code set according to the PCI new code set of the previous generation network can be as follows: adding a preset constant to each PCI in the PCI newly-built code set of the previous generation network, wherein the set formed by the new PCI is a new PCI newly-built code set.
The preset constant is determined by the actual network scenario.
For example, the total number of PCI codes of the 4G LTE network is 504, the 5G NR network plans 1008 PCI codes, and if the base station to be planned is a 5G NR base station, the preset constant is 504. Setting a PCI new code set of a 5G NR network to be planned as R 1 PCI new code set of 4G LTE network is R 1 ' the PCI new code set of single ring is R C R is then 1 And R is C The calculation formula of (2) is as follows:
R 1 ＝R′ 1 ∪(R′ 1 +504)
wherein R 'is' 1 +504 denotes the new PCI new code set, i.e. by R' 1 Add 504 to each PCI of the new PCI component set.
Setting up to waitPCI capacity expansion code set of planned 5G NR network is R 2 PCI capacity expansion code set of 4G LTE network is R' 2 R is then 2 The calculation formula of (2) is as follows:
R 2 ＝R′ 2 ∪(R′ 2 +504)
wherein R 'is' 2 +504 represents a new PCI expansion code set, i.e., by R' 2 Add 504 to each PCI of the new PCI component set.
By adopting the mode, the newly-built code resource pool of the 5G NR is 2 times of the newly-built code resource pool of the 4G LTE, and similarly, the capacity-expanding code resource pool of the 5G NR is 2 times of the capacity-expanding code resource pool of the 4G LTE, and the capacity-expanding code resource pool of the 5G NR is reserved, so that the subsequent capacity expansion is convenient to use. The PCI of co-located NR base station deployment and the PCI of newly built NR base station deployment can be kept the maximum multiplexing distance, and interference is avoided.
In the PCI generation method provided by the embodiment of the invention, the concentric rings are distinguished according to the parity of the numbers, the PCI of each cell of the base station in the odd quadrant continuously uses the newly-built code set of the PCI of the previous generation network, and the PCI of each cell of the base station in the even quadrant uses the newly-built code set of the PCI, thereby further avoiding the inter-system interference.
Based on any one of the foregoing embodiments, further, the generating, according to the PCI new code set of the previous generation network, the PCIs of each cell of the target base station specifically includes:
determining the PCI model 3 value of each cell in the target base station according to the azimuth angle of each cell of the target base station and the main direction angle of the PCI model 3 value corresponding to the target concentric ring; the target concentric ring is a concentric ring where the target base station is located; each concentric ring in the concentric ring array corresponds to a main direction angle of a group of PCI model 3 values;
generating the PCI of each cell of the target base station according to the PCI module 3 value of each cell in the target base station and the PCI new code set of the previous generation network, wherein the PCI of all the generated cells of the target base station is a group of PCI in the PCI new code set of the previous generation network, and the PCI of each cell is matched with the corresponding PCI module 3 value.
Specifically, in the embodiment of the present invention, in the process of constructing the concentric ring array, a main direction angle of the PCI mode 3 value corresponding to each concentric ring needs to be determined.
Definition a i4 Is C i The main direction angle of PCI model 3 is 0, and the value range is [0,360]；a i5 Is C i The main direction angle with PCI model 3 as 1 is in the range of [0,360 ]]；a i6 Is C i PCI modulo 3 is the principal direction angle of 2.
Fig. 6 is a statistical distribution diagram of a main direction angle of a PCI mode 3 value corresponding to a concentric ring according to an embodiment of the present invention, and as shown in fig. 6, the main direction angle of the PCI mode 3 value corresponding to each concentric ring is determined by using a statistical principle.
Statistics C i And (3) the direction angle of all the 4G LTE current network cells and the corresponding current network PCI value in the network are calculated, and the module 3 value of the PCI of all the current network cells is calculated. Statistics C i All cells with PCI mod3 of 0 in the cells, calculating the distribution condition of the direction angles of the cells in 0-360 degrees (granularity is 1 degree), and taking the direction with the largest distribution cell as C i The corresponding PCI modulo 3 is the principal direction angle of 0, i.e. a i4 The method comprises the steps of carrying out a first treatment on the surface of the Statistics C i In all cells with PCI MOD3 of 1, calculating the distribution of the direction angles of the cells within 0-360 degrees (granularity is 1 degree), and taking the direction with the largest distribution cell as C i The corresponding PCI modulo 3 is the principal direction angle of 1, i.e. a i5 . By analogy, C can be obtained i The corresponding PCI modulo 3 is the principal direction angle of 2, namely a i6 。
The constructed concentric circular ring array can be represented by the following m×n matrix:
m is the number of concentric rings in the concentric ring array, n is the number of elements of the concentric rings, and n is more than or equal to 6, a i1 Is C i Is a of small radius of (a) i2 Is C i Large radius of a) i3 Is C i Quadrant properties of a) i4 Is C i Main direction angle, a, of medium PCI model 3 is 0 i5 Is C i The main direction angle of PCI model 3 is 1, a i6 Is C i In the case that PCI model 3 is 2 main direction angle and n is more than 6, a in Is C i The custom elements which are reserved according to the need are determined according to the practical application.
After the target concentric ring of the target base station is determined, the main direction angle of the PCI model 3 value corresponding to the target concentric ring can be determined through inquiry.
And respectively determining the main direction angle closest to the azimuth angle of each cell of the target base station by comparing the main direction angles of the azimuth angles of the cells of the target base station with the PCI model 3 values corresponding to the concentric circles of the target, and taking the PCI model 3 value corresponding to the closest main direction angle as the PCI model 3 value of the cell of the target base station.
Let the 1 st cell direction angles of the target base station be respectively theta c1 The generated PCI value is PCI c1 The 2 nd cell direction angles are respectively theta c2 The generated PCI value is PCI c2 The 3 rd cell direction angles are respectively theta c3 The generated PCI value is PCI c3 The formula for determining the PCI modulo 3 value of each cell in the target base station is as follows:
and generating the PCI of each cell of the target base station according to the PCI module 3 value of each cell in the target base station and the PCI new code set of the previous generation network, wherein the PCI of all the generated cells of the target base station is a group of PCI in the PCI new code set of the previous generation network, and the PCI of each cell is matched with the corresponding PCI module 3 value. Typically, a group of PCI consists of 3 consecutive PCI's.
For example, a group of PCI code resources selected from the PCI new code set of the previous generation network is (603, 604, 605), and the PCI value of the cell with the PCI modulo 3 value 0, the PCI value of the cell with the PCI modulo 3 value 1, and the PCI value of the cell with the PCI modulo 3 value 2 are determined to be 603,604,605 according to the PCI modulo 3 values of the cells in the target base station.
The PCI generating method provided by the embodiment of the invention adopts the modulo-3 attribute of the concentric ring array to realize the PCI code resource deployment of the newly-built base station and the minimization of the deployed code resource interference.
Based on any one of the foregoing embodiments, further, the generating, based on the new PCI new code set, the PCIs of each cell of the target base station specifically includes:
Determining the PCI model 3 value of each cell in the target base station according to the azimuth angle of each cell of the target base station and the main direction angle of the PCI model 3 value corresponding to the target concentric ring; the target concentric ring is a concentric ring where the target base station is located; each concentric ring in the concentric ring array corresponds to a main direction angle of a group of PCI model 3 values;
generating the PCI of each cell of the target base station according to the PCI module 3 value of each cell in the target base station and the new PCI new code set, wherein the generated PCI of all cells of the target base station is a group of PCI in the new PCI new code set, and the PCI of each cell is matched with the corresponding PCI module 3 value.
Specifically, in the embodiment of the present invention, after determining the target concentric ring where the target base station is located, the main direction angle of the PCI modulo 3 value corresponding to the target concentric ring can be determined by querying.
And respectively determining the main direction angle closest to the azimuth angle of each cell of the target base station by comparing the main direction angles of the azimuth angles of the cells of the target base station with the PCI model 3 values corresponding to the concentric circles of the target, and taking the PCI model 3 value corresponding to the closest main direction angle as the PCI model 3 value of the cell of the target base station.
And then generating the PCI of each cell of the target base station according to the PCI module 3 value of each cell in the target base station and the new PCI new code set, wherein the PCI of all the cells of the generated target base station is a group of PCI in the new PCI new code set, and the PCI of each cell is matched with the corresponding PCI module 3 value.
The PCI generating method provided by the embodiment of the invention adopts the modulo-3 attribute of the concentric ring array to realize the PCI code resource deployment of the newly-built base station and the minimization of the deployed code resource interference.
Finally, it should be noted that: before generating the PCI of the base station, the basic parameters of the previous generation network need to be imported into the system, including but not limited to: base station name, base station ID, longitude and latitude, cell ID, cell azimuth and cell PCI.
Meanwhile, basic parameters of the current network to be planned need to be imported into the system, and the basic parameters of the current network include, but are not limited to: base station name, base station ID, longitude and latitude, cell ID, cell direction angle, co-location attribute, base station ID of co-located base station of previous generation network, longitude and latitude of co-located base station of previous generation network, cell ID of co-located base station of previous generation network, cell azimuth of co-located base station of previous generation network and cell PCI of co-located base station of previous generation network.
Meanwhile, map resources and the area S to be planned can be imported, and visual presentation of the base station in the area to be planned is achieved.
Finally, the deployment scheme P of the co-located base station is extracted M Deployment scenario P for newly built non-co-sited base stations N The two deployment schemes are processed in a union mode to form a final PCI deployment scheme P of the current network ALL ，P ALL ＝P M ∪P N Output forms include, but are not limited to, view presentation, document output, and the like.
Based on any one of the foregoing embodiments, fig. 7 is a schematic diagram of a PCI generating device provided by an embodiment of the present invention, and as shown in fig. 7, an embodiment of the present invention provides a PCI generating device, configured to execute a method described in any one of the foregoing embodiments, and specifically includes a determining module 701 and a generating module 702, where:
the judging module 701 is configured to judge whether a target base station to be planned is co-located with a base station of a previous generation network; the generating module 702 is configured to generate PCIs of each cell of the target base station based on PCIs of the co-located base station and positions of the target base station in a preset concentric ring array, if there are base stations of a previous generation network co-located with the target base station, where the concentric ring array is formed by a plurality of concentric rings divided by a circle including an area to be planned.
An embodiment of the present invention provides a PCI generating device, configured to execute the method described in any one of the foregoing embodiments, and specific steps of executing the method described in the foregoing embodiment by using the device provided in this embodiment are the same as those of the foregoing corresponding embodiment, and are not repeated herein.
According to the PCI generating device provided by the embodiment of the invention, the PCI of each cell of the base station to be planned is generated by combining the PCI of the cell of the previous generation network according to the position of the base station to be planned in the preset concentric ring array, so that the resource waste is avoided, and the intersystem interference is avoided.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, as shown in fig. 8, where the electronic device includes: a processor 801, a communication interface (Communications Interface) 802, a memory 803, and a communication bus 804, wherein the processor 801, the communication interface 802, and the memory 803 communicate with each other through the communication bus 804. The processor 801 may call a computer program stored on the memory 803 and executable on the processor 801 to perform the steps of:
judging whether a target base station to be planned is co-located with a base station of a previous generation network;
if a base station of a previous generation network co-located with the target base station exists, generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in a preset concentric ring array, wherein the concentric ring array consists of a plurality of concentric rings divided by a circle containing an area to be planned.
Further, the logic instructions in the memory 803 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Further, an embodiment of the present invention provides a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements the steps in the above-described method embodiments, for example, including:
Judging whether a target base station to be planned is co-located with a base station of a previous generation network;
if a base station of a previous generation network co-located with the target base station exists, generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in a preset concentric ring array, wherein the concentric ring array consists of a plurality of concentric rings divided by a circle containing an area to be planned.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A method for generating a physical cell identifier PCI, comprising:
judging whether a target base station to be planned is co-located with a base station of a previous generation network;
if a base station of a previous generation network co-located with the target base station exists, generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in a preset concentric ring array, wherein the concentric ring array consists of a plurality of concentric rings divided by a circle containing an area to be planned.
2. The PCI generating method according to claim 1, wherein generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in a preset concentric circular array specifically comprises:
Determining the serial number of the concentric ring where the target base station is located according to the longitude and latitude of the target base station; the concentric rings are numbered in turn from small to large or from large to small in radius in advance;
generating the PCI of each cell of the target base station based on the parity of the serial numbers of the concentric circles where the target base station is located and the PCI of the co-located base station.
3. The PCI generating method according to claim 2, wherein generating the PCIs of each cell of the target base station based on the parity of the numbers of the concentric circles in which the target base station is located and the PCIs of the co-located base stations, specifically comprises:
if the number of the concentric rings where the target base station is located is even, generating the PCI of each cell of the target base station according to the PCI of the co-located base station, wherein the generated PCI of the cell of the target base station is equal to the PCI of the corresponding cell in the co-located base station;
if the number of the concentric rings where the target base station is located is an odd number, generating the PCI of each cell of the target base station according to the PCI of the co-located base station and a preset constant, wherein the generated value of the PCI of the cell of the target base station is equal to the value of the PCI of the corresponding cell in the co-located base station plus the preset constant.
4. The PCI generating method according to claim 1, wherein after said determining whether the target base station to be planned is co-located with the base station of the previous generation network, further comprising:
if the base station of the previous generation network co-located with the target base station does not exist, generating the PCI of each cell of the target base station based on the PCI new code set of the previous generation network and the position of the target base station in a preset concentric ring array.
5. The method for generating PCI according to claim 4, wherein generating PCI of each cell of the target base station based on the new code set of PCI of the previous generation network and the position of the target base station in the preset concentric ring array specifically comprises:
determining the serial number of the concentric ring where the target base station is located according to the longitude and latitude of the target base station; the concentric rings are numbered in turn from small to large or from large to small in radius in advance;
generating the PCI of each cell of the target base station based on the parity of the serial numbers of the concentric rings where the target base station is located and the PCI new code set of the previous generation network.
6. The PCI generating method according to claim 5, wherein generating the PCI of each cell of the target base station based on the parity of the number of the concentric ring where the target base station is located and the PCI new code set of the previous generation network specifically comprises:
If the serial number of the concentric ring where the target base station is located is an odd number, generating the PCI of each cell of the target base station according to the PCI newly-built code set of the previous generation network;
if the number of the concentric rings where the target base station is located is even, determining a new PCI new code set according to the PCI new code set of the previous generation network, and generating the PCI of each cell of the target base station based on the new PCI new code set.
7. The PCI generating method according to claim 6, wherein said generating the PCIs of each cell of said target base station from the PCI new code set of said previous generation network, specifically comprises:
determining the PCI model 3 value of each cell in the target base station according to the azimuth angle of each cell of the target base station and the main direction angle of the PCI model 3 value corresponding to the target concentric ring; the target concentric ring is a concentric ring where the target base station is located; each concentric ring in the concentric ring array corresponds to a main direction angle of a group of PCI model 3 values;
generating the PCI of each cell of the target base station according to the PCI module 3 value of each cell in the target base station and the PCI new code set of the previous generation network, wherein the PCI of all the generated cells of the target base station is a group of PCI in the PCI new code set of the previous generation network, and the PCI of each cell is matched with the corresponding PCI module 3 value.
8. The PCI generating method according to claim 6, wherein generating the PCIs of the respective cells of the target base station based on the new PCI new code set, specifically comprises:
determining the PCI model 3 value of each cell in the target base station according to the azimuth angle of each cell of the target base station and the main direction angle of the PCI model 3 value corresponding to the target concentric ring; the target concentric ring is a concentric ring where the target base station is located; each concentric ring in the concentric ring array corresponds to a main direction angle of a group of PCI model 3 values;
generating the PCI of each cell of the target base station according to the PCI module 3 value of each cell in the target base station and the new PCI new code set, wherein the generated PCI of all cells of the target base station is a group of PCI in the new PCI new code set, and the PCI of each cell is matched with the corresponding PCI module 3 value.
9. A PCI generating apparatus, comprising:
the judging module is used for judging whether the target base station to be planned is co-located with the base station of the previous generation network;
and the generation module is used for generating the PCI of each cell of the target base station based on the PCI of the co-located base station and the position of the target base station in a preset concentric ring array if the base station of the previous generation network co-located with the target base station exists, wherein the concentric ring array consists of a plurality of concentric rings which are formed by dividing a circle containing an area to be planned.
10. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, performs the steps of the PCI generation method of any one of claims 1 to 8.
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