CN108966237B - Method and device for determining frequency fading evaluation standard and frequency fading evaluation method and device - Google Patents

Method and device for determining frequency fading evaluation standard and frequency fading evaluation method and device Download PDF

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CN108966237B
CN108966237B CN201710357734.9A CN201710357734A CN108966237B CN 108966237 B CN108966237 B CN 108966237B CN 201710357734 A CN201710357734 A CN 201710357734A CN 108966237 B CN108966237 B CN 108966237B
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carrier frequency
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CN108966237A (en
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黄剑锋
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Ultrapower Software Co ltd
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    • 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
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning
    • H—ELECTRICITY
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Abstract

The embodiment of the invention provides a method and a device for determining a frequency fading evaluation standard and a frequency fading evaluation method and device, and relates to the technical field of mobile communication. The method for determining the frequency-fading evaluation standard comprises the following steps: setting a standard frequency point multiplexing frequency according to the corresponding relation between the frequency point multiplexing frequency in the cell interference cluster and the network service quality; and setting standard carrier frequency load according to the corresponding relation between the carrier frequency load of the cell in the cell interference cluster and the network service quality of the cell. The technical scheme provided by the embodiment of the invention determines the evaluation standard of the frequency-fading feasibility of the GSM network, and the frequency-fading feasibility evaluation standard can be used for efficiently and accurately realizing frequency fading, so that the scientific and reasonable frequency spectrum replanning is carried out, the efficient utilization of frequency spectrum resources is ensured, and the continuous and stable comprehensive performance of the network before and after frequency fading is ensured.

Description

Method and device for determining frequency fading evaluation standard and frequency fading evaluation method and device
Technical Field
The embodiment of the invention relates to the technical field of mobile communication, in particular to a method and a device for determining a frequency fading evaluation standard and a frequency fading evaluation method and device.
Background
With the rapid development of mobile communication networks, 4G (fourth generation mobile communication technology) networks have completed large-scale popularization and commercial use; NB-IoT (Narrow Band internet of things over cellular) and eMTC (enhanced Machine Type Communication) based on 3GPP (The 3rd Generation Partnership Project) have also completed standard freeze and entered laboratory testing phase, which is expected to be commercially available soon as The industry chain advances in many ways. However, the fusion development of LTE (Long Term Evolution), NB-IoT and eMTC based on FDD (frequency division duplex) lacks precious spectrum resources, which requires readjustment and more reasonable planning arrangement of spectrum resources including 2G (second generation Mobile Communication technology) cellular Mobile Communication networks such as GSM (Global System for Mobile Communication) and DCS (Distributed Control System), i.e., so-called frequency re-cultivation. Research aiming at the possibility of frequency fading of the existing network and how to ensure smooth transition of the performance of the existing network while freeing up frequency resources is an important technical subject to be faced by mobile network operators.
To evaluate the feasibility of frequency fading, the main factors affecting the network performance must be comprehensively analyzed and researched. At present, a set of scientific and efficient theoretical technical method is lacked for a reliable frequency-fading feasibility evaluation method and a standardized frequency-fading method.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining a frequency fading evaluation standard and a method and a device for frequency fading evaluation, which are used for solving the problem of how to scientifically and efficiently implement frequency fading on spectrum resources in the existing network.
In a first aspect, an embodiment of the present invention provides a method for determining a frequency-fading evaluation criterion, including:
setting a standard frequency point multiplexing frequency according to the corresponding relation between the frequency point multiplexing frequency in the cell interference cluster and the network service quality;
and setting standard carrier frequency load according to the corresponding relation between the carrier frequency load of the cell in the cell interference cluster and the network service quality of the cell.
In a second aspect, an embodiment of the present invention provides a frequency-fading evaluation method, including:
acquiring the carrier frequency requirement of the current cell according to the standard carrier frequency load and the network traffic of the cell;
acquiring total carrier frequency requirements in a cell interference cluster according to the carrier frequency requirements of each cell;
obtaining theoretical carrier frequency capacity configured in a cell interference cluster according to the standard frequency point multiplexing frequency and the planned frequency point number after frequency fading;
if the theoretical carrier frequency capacity is not less than the total carrier frequency requirement, evaluating that the number of the proposed frequency points after frequency fading meets the requirement; otherwise, evaluating that the number of the proposed frequency points after frequency fading does not meet the requirement. .
In a third aspect, an embodiment of the present invention provides an apparatus for determining a frequency-fading evaluation criterion, including:
the first standard setting module is used for setting the standard frequency point multiplexing frequency according to the corresponding relation between the frequency point multiplexing frequency in the cell interference cluster and the network service quality;
and the second standard setting module is used for setting the standard carrier frequency load according to the corresponding relation between the carrier frequency load of the cell in the cell interference cluster and the network service quality of the cell.
In a fourth aspect, an embodiment of the present invention provides a frequency-fading evaluation apparatus, including:
a first carrier frequency demand obtaining module, configured to obtain a carrier frequency demand of a current cell according to a standard carrier frequency load and a network traffic volume of the cell;
a second carrier frequency demand obtaining module, configured to obtain a total carrier frequency demand in the cell interference cluster according to the carrier frequency demand of each cell;
a theoretical carrier frequency capacity obtaining module, which obtains the theoretical carrier frequency capacity configured in the cell interference cluster according to the standard frequency point multiplexing frequency and the planned frequency point number after frequency fading;
the evaluation module is used for evaluating that the number of the proposed frequency points after frequency fading meets the requirement if the theoretical carrier frequency capacity is not less than the total carrier frequency requirement; otherwise, evaluating that the number of the proposed frequency points after frequency fading does not meet the requirement.
According to the embodiment of the invention, the standard frequency point multiplexing frequency is set according to the corresponding relation between the frequency point multiplexing frequency in the cell interference cluster and the network service quality, and then the standard carrier frequency load is set according to the corresponding relation between the carrier frequency load of the cell in the cell interference cluster and the network service quality of the cell, so that the evaluation standard of the frequency fading feasibility of the GSM network is determined, and the frequency fading can be efficiently and accurately realized by using the evaluation standard of the frequency fading feasibility, so that the scientific and reasonable frequency spectrum re-cultivation is carried out, the efficient utilization of frequency spectrum resources is ensured, and the continuous and stable comprehensive performance of the network before and after the frequency fading is ensured.
These and other aspects of the invention are apparent from and will be elucidated with reference to the embodiments described hereinafter.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart illustrating a method for determining a frequency-fading evaluation criterion according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the structural composition of a cellular network;
FIG. 3 shows a corresponding relationship diagram between the multiplexing frequency of the frequency points in the cell interference cluster and the 0-4 level ratio of the voice quality;
fig. 4 shows a corresponding relationship diagram between the TCH comprehensive utilization ratio of a cell in a cell interference cluster and the 0-4 level ratio of the uplink and downlink voice quality of the cell;
FIG. 5 is a diagram showing the correspondence between PDCH reuse degrees and TBF congestion rates of cells in a cell interference cluster;
fig. 6 is a flowchart illustrating a frequency drop evaluation method according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating another embodiment of a frequency demultiplex method provided by the embodiment of the present invention;
fig. 8 is a block diagram illustrating an apparatus for determining a frequency-fading evaluation criterion according to an embodiment of the present invention;
fig. 9 is a block diagram illustrating a structure of a frequency-fading evaluation apparatus according to an embodiment of the present invention;
fig. 10 shows a block diagram of a frequency demultiplication apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In some of the flows described in the present specification and claims and in the above figures, a number of operations are included that occur in a particular order, but it should be clearly understood that these operations may be performed out of order or in parallel as they occur herein, with the order of the operations being indicated as 101, 102, etc. merely to distinguish between the various operations, and the order of the operations by themselves does not represent any order of performance. Additionally, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first", "second", etc. in this document are used for distinguishing different messages, devices, modules, etc., and do not represent a sequential order, nor limit the types of "first" and "second" to be different.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a flowchart of a method for determining a frequency-fading evaluation criterion according to an embodiment of the present invention is shown, where the method may specifically include the following steps:
step 101, setting a standard frequency point multiplexing frequency according to a corresponding relation between the frequency point multiplexing frequency in a cell interference cluster and network service quality.
In a preferred example of the present invention, step 101 may specifically include the following sub-steps:
and a substep 11, constructing a corresponding relation between the frequency point multiplexing frequency and the voice quality in the cell interference cluster.
The frequency point multiplexing frequency in the CELL interference cluster is the average multiplexing frequency of each frequency point in the CELL interference cluster, and the CELL CELL is usediCentered cell interference cluster phiiThe calculation formula of the internal frequency point multiplexing frequency is as follows:
Figure GDA0003311157410000041
wherein CELLjIs a CELL CELLiCovering neighbouring CELLs, V (i) being a CELL CELLiNumber of allocated carrier frequenciesM is a cell interference cluster phiiThe number of frequency points available within; the molecular part in the above formula is represented by CELLiCentered cell interference cluster phiiTotal number of carrier frequencies.
The corresponding relation between the frequency point multiplexing frequency and the voice quality in the cell interference cluster can be obtained through experiments or obtained by analyzing the existing network model.
After obtaining a network model, the structure of the network model, i.e. the number of interfering cluster cells included in the entire network and the number of cells included in the interfering cluster cells, needs to be analyzed first. The step of analyzing the network structure comprises:
step 1101, obtaining a coverage correlation coefficient between every two cells according to the number of coverage grids of the cells, the number of sampling points in the grids and the receiving level intensity of the sampling points in the grids.
Fig. 2 is a schematic diagram illustrating the structure of a cellular network. In the embodiment of the present invention, a coverage correlation matrix C of a cellular network may be constructed by using a coverage correlation coefficient between two cells as an element, where the coverage correlation matrix C may be defined as:
Figure GDA0003311157410000051
wherein each element CijFor the coverage correlation coefficient between two cells, which may also be referred to as the interference correlation coefficient, 0 ≦ CijLess than or equal to 1. When C is presentijWhen 0, it means two CELLs CELLiAnd CELLjOverlapping no-coverage areas, i.e. two cells covering uncorrelated; when C is presentijWhen 1, it means two CELLs CELLiAnd CELLjCompletely overlapping coverage, i.e. two cell coverage overlap are correlated. In a practical network, only the own cell is associated with self-coincidence, namely Cij＝1。
CijAnd f (g) a function mapping relation determined by factors such as the number of coverage grids of two adjacent cells, the receiving level intensity of sampling points in the grids, the number of sampling points in each grid and the like is generated, and the function mapping relation is expressed as the following formula:
Cij＝f|Pi(gi，k)，Pj(gi，k)，Mi(gi，k)，gi，k∈Gi|
the sampling points can be obtained according to wireless network test data, MR data, simulation data and the like; definition of CELLiBeing a serving CELL, CELLjTo cover a neighboring cell; in the formula GiTo CELLiSet of all the grids covered, Mi(gi，k) To CELLiNumber of sampling points, P, collected in the coverage gridi(gi，k) To CELLiOn the grid gi，kStrength of received level in, Pj(gi，k) To cover a neighbor CELLjOn the grid gi，kThe received level strength of (1).
Step 1102, obtaining the number of interfering cluster cells included in the cellular network and the number of cells included in the interfering cluster cells according to the coverage correlation coefficient.
In CELLiCentered cell coverage association cluster ΦiAlso called cell interference cluster, can be expressed as:
Φi＝{CELLj，Cij＞CLOW＞0，j＝1，...，N}
wherein C isLOWMinimum coverage association threshold between cells for which overlapping coverage needs to be considered, and having CLOW> 0, in engineering practice, CLOWCan be flexibly set by combining the actual conditions of the network, such as setting CLOWIs greater than 0.02. Wherein the CELL CELLi∈Φi。
By the method, the structural composition of the whole network can be obtained, and the cell interference cluster phi is obtained according to the statistics of the existing network dataiNumber of frequency points M available in CELLiAnd finally, obtaining the frequency point multiplexing frequency through a calculation formula of the frequency point multiplexing frequency. The voice quality corresponding to the frequency point multiplexing frequency can be obtained through network statistics, and similarly, the voice quality corresponding to the frequency point multiplexing frequency can be obtainedAnd the multiple groups of frequency point multiplexing frequencies and the corresponding voice quality thereof further construct the corresponding relation between the frequency point multiplexing frequencies and the voice quality in the cell interference cluster.
The voice quality can be explained by a voice quality level ratio.
And a substep 12, searching the corresponding frequency point multiplexing frequency when the voice quality instability coefficient is greater than the first threshold value.
The unstable coefficient of the voice quality can be obtained by calculation according to the numerical value change corresponding to the voice quality, and when the unstable coefficient reaches a first threshold value, the voice quality begins to be deteriorated, and the voice quality cannot be kept stable.
And a substep 13, setting the searched frequency point multiplexing frequency as a standard frequency point multiplexing frequency.
By utilizing the method, the network of a main urban area of a certain city is used as a model for analysis, and a corresponding relation graph between the frequency point multiplexing frequency and the speech quality 0-4 level ratio in the cell interference cluster shown in figure 3 is obtained. As shown in FIG. 3, the frequency r is the frequency of multiplexing the frequency pointsiWhen the frequency is more than 1.6 times/interference cluster, the 0-4 level ratio fluctuation of the voice quality in the cell interference cluster is obviously aggravated, and the instability coefficient is also increased. Therefore, in order to ensure the voice quality, the embodiment of the invention requires the frequency point multiplexing frequency r in the cell interference clusteriLess than or equal to 1.6 times per interference cluster. Correspondingly, multiplexing frequency r of the standard frequency point in the evaluation standard of the frequency fading feasibilityiThe standard frequency point multiplexing frequency can be the maximum frequency point multiplexing frequency allowed in evaluation, and is set to be 1.6 times/interference cluster. When the frequency point multiplexing frequency is 1.6, an ideal frequency reduction number can be obtained at the moment, and the network service performance can be ensured. It should be noted that the standard frequency point multiplexing frequency can take any value of 1-1.8.
Therefore, in the embodiment of the present invention, all cell interference clusters in the whole network must satisfy:
Figure GDA0003311157410000061
it should be noted that, the standard frequency point multiplexing frequency may also be taken as a value according to a specific situation, and is not limited herein.
Step 102, according to the corresponding relation between the carrier frequency load of the cell in the cell interference cluster and the network service quality of the cell, setting the standard carrier frequency load.
In a preferred example of the embodiment of the present invention, step 102 may include:
step 21, setting a standard TCH comprehensive utilization rate according to a corresponding relation between a Traffic Channel (TCH) comprehensive utilization rate of a cell in the cell interference cluster and the voice quality of the cell. Further, step 21 may specifically include the following sub-steps:
substep 2101, construct the corresponding relation between the TCH comprehensive utilization of the cell in the cell interference cluster and the voice quality of the cell.
For the guarantee of voice service quality, the embodiment of the invention provides TCH-based comprehensive utilization rate RTCHAnd (4) comparing and evaluating the relation with the voice quality. TCH comprehensive utilization ratio RTCHThe calculation formula of (a) is as follows:
Figure GDA0003311157410000071
wherein, Ti vIs a CELL CELLiThe voice telephone traffic of busy hour unit time can be the average voice telephone traffic of busy hour per second, and the unit is Ireland; t isi DThe data equivalent telephone traffic in unit time of busy hour is the average data equivalent telephone traffic per second of busy hour, the data equivalent telephone traffic is the telephone traffic generated when the data service is equivalent to the voice service, and the unit is Ireland; vTCH(i) Is a CELL CELLiThe number of TCHs configured. The "busy hour" in the embodiment of the present invention may refer to two traffic high-occurrence periods, namely "early busy hour" (9:00 to 11:00) and "late busy hour" (19:00 to 21:00), respectively.
In addition, Ti DThe calculation formula of (a) is as follows:
Figure GDA0003311157410000072
wherein, ti PDCHIs a CELL CELLiBusy hour the total duration of the PDCH (Packet Data CHannel) occupied by Data traffic per hour. t is ti PDCHThe CELL CELL can be calculated firstiThe inner data service sums the occupation duration of each PDCH with the occupation duration of each PDCH.
According to the embodiment of the invention, the corresponding relation between the TCH comprehensive utilization rate of the cell in the cell interference cluster and the voice quality of the cell can be constructed by carrying out statistical analysis on the existing network big data. The comprehensive utilization rate R of TCH can be obtained in the network big dataTCHIncluding CELLiBusy hour unit time voice telephone traffic Ti vData equivalent traffic T in busy hour unit timei DCELL, CELLiConfigured TCH number VTCH(i) Further obtain TCH comprehensive utilization rate RTCH. And then the voice quality corresponding to the TCH comprehensive utilization rate is obtained through network statistics. The voice quality can be represented by the ratio of 0-4 levels of the uplink voice quality and the downlink voice quality. The comprehensive utilization rate of a plurality of groups of TCHs and the corresponding voice quality can be obtained by inquiring the existing network big data, and then the corresponding relation between the comprehensive utilization rate of the TCHs of the cell in the cell interference cluster and the voice quality of the cell is obtained.
And a substep 2102 of searching corresponding TCH comprehensive utilization rate when the voice quality instability coefficient is larger than a second threshold value.
The second threshold may be equal to the first threshold.
And a substep 2103 of setting the searched TCH comprehensive utilization rate as the standard TCH comprehensive utilization rate.
To clearly illustrate the embodiment of the present invention, the corresponding relationship between the TCH comprehensive utilization rate of the cell in the cell interference cluster and the voice quality of the cell is represented by the corresponding relationship between the TCH comprehensive utilization rate of the cell in the cell interference cluster and the 0-4 level ratio of the uplink and downlink voice quality of the cell as shown in fig. 4. As can be seen from FIG. 4, when TCH has a comprehensive utilization rate RTCHWhen the traffic speed is more than 60%, the voice quality in the network begins to be unstable, and along with TCH comprehensive utilization rate RTCHThe speech quality is extremely unstable with further increase in the number of frames. In the embodiment of the invention, the standard TCH comprehensive utilization rate in the frequency-fading feasibility evaluation standard is set to be 60%, and the standard TCH comprehensive utilization rate can be the maximum TCH comprehensive utilization rate allowed in evaluation, so that in the frequency-fading process, in order to really ensure the voice service quality perception of a user, the TCH comprehensive utilization rate of the current network is recommended to be controlled to be RTCHLess than or equal to 60 percent to keep the voice quality stable.
It should be noted that the TCH comprehensive utilization rate can also be set to any value of 10% to 80% according to specific situations.
And step 22, setting standard PDCH multiplexing according to the corresponding relation between the PDCH multiplexing of the cell in the cell interference cluster and the TBF (Temporary Block Flow) congestion rate.
Further, step 22 may specifically include the following sub-steps:
substep 2201, constructing the corresponding relation between the PDCH reuse degree of the cell in the cell interference cluster and the TBF congestion rate.
PDCH reuse degree RPDCHThe calculation formula of (a) is as follows:
Figure GDA0003311157410000081
wherein, VPDCH(i) Is a CELL CELLiA configured number of PDCHs, which may include EGPRS PDCH and GPRS PDCHs;
Figure GDA0003311157410000082
the TBFs may include EGPRS TBFs and GPRS TBFs, which are the average number of concurrent TBFs in the downlink per unit time in busy hours.
The TBF congestion rate is the ratio of the rejection number of TBF establishment requests (including EGPRS and GPRS) and the number of TBF establishment attempts (including EGPRS and GPRS).
For the guarantee of the data service quality, the embodiment of the invention provides the reuse degree R based on PDCHPDCHAnd quality of data serviceAnd (4) evaluation algorithm of the relationship. The data traffic quality may be illustrated by the TBF congestion rate.
The embodiment of the invention can construct the corresponding relation between the PDCH reuse degree of the cell in the cell interference cluster and the TBF congestion rate by carrying out statistical analysis on the existing network big data. The calculated PDCH reuse degree R can be obtained in the network big dataPDCHIncluding CELLiConfigured PDCH number VPDCH(i) Number of TBFs concurrent in unit time of busy hour
Figure GDA0003311157410000091
And obtaining the PDCH reuse degree R through network communicationPDCHCorresponding TBF congestion rate. By inquiring the existing network big data, a plurality of groups of PDCH reuse degrees and corresponding TBF congestion rates thereof can be obtained, and further the corresponding relation between the PDCH reuse degrees and the TBF congestion rates of the cells in the cell interference cluster is obtained.
And a substep 2202, searching corresponding PDCH reuse degree when the TBF congestion rate instability coefficient is greater than a third threshold value.
The TBF congestion rate instability coefficient can be obtained by calculation according to the numerical change of the TBF congestion rate. When the congestion rate instability coefficient of the TBF reaches a third threshold value, the data service quality begins to deteriorate.
And a substep 2203, setting the searched PDCH multiplexing degree as the standard PDCH multiplexing degree.
To clearly illustrate the embodiment of the present invention, the corresponding relationship between the PDCH reuse degree of the cell in the cell interference cluster and the TBF congestion rate is represented by using the corresponding relationship between the PDCH reuse degree of the cell in the cell interference cluster and the TBF congestion rate as shown in fig. 5. As can be seen from FIG. 5, when the PDCH multiplexing degree R is reachedPDCHWhen the time is more than 3, the TBF congestion rate is obviously increased; when PDCH reuse degree RPDCHWhen the time is less than or equal to 3 times, the data service quality is kept stable. It is therefore proposed that PDCH reuse degree after frequency-down be controlled at RPDCHWithin 3 times or less, to keep the stable performance of wireless network data service. In the embodiment of the invention, the standard PDCH reuse degree in the frequency-fading feasibility evaluation standard can be set to 3 times. The standard PDCH reuse level may be the maximum allowable in the evaluationPDCH multiplexing degree.
It should be noted that, in the frequency demultiplication process, the PDCH reuse degree may also be set to any value of 1 to 3.8 according to specific situations.
According to the embodiment of the invention, the standard frequency point multiplexing frequency is set according to the corresponding relation between the frequency point multiplexing frequency in the cell interference cluster and the network service quality, and then the standard carrier frequency load is set according to the corresponding relation between the carrier frequency load of the cell in the cell interference cluster and the network service quality of the cell, so that the evaluation standard of the frequency fading feasibility of the GSM network is determined, and the frequency fading can be efficiently and accurately realized by using the evaluation standard of the frequency fading feasibility, so that the scientific and reasonable frequency spectrum re-cultivation is carried out, the efficient utilization of frequency spectrum resources is ensured, and the continuous and stable comprehensive performance of the network before and after the frequency fading is ensured.
The embodiment of the invention determines the evaluation standard of the feasibility of frequency quitting of the GSM network, and the frequency quitting can be efficiently and accurately realized by using the evaluation standard of the feasibility of frequency quitting, so that the scientific and reasonable frequency spectrum replanning is carried out, the efficient utilization of frequency spectrum resources is ensured, and the continuous and stable comprehensive performance of the network before and after frequency quitting is ensured.
Referring to fig. 6, a flowchart of a frequency drop evaluation method provided by the embodiment of the present invention is shown, and the inventive concept of the method is to ensure that the frequency point multiplexing frequency in each cell interference cluster is not greater than the set standard frequency point multiplexing frequency after the existing frequency points in the network are subjected to frequency drop; after the number of carrier frequencies configured in a cell is reduced, it is required to ensure that the current carrier frequency load is not greater than the set standard carrier frequency load, and if the above conditions are met, the frequency-canceling scheme is feasible. The method may specifically comprise the steps of:
step 601, obtaining the carrier frequency requirement of the current cell according to the standard carrier frequency load and the network traffic of the cell.
In a preferred example of the embodiment of the present invention, step 601 may specifically include:
and step 31, obtaining the TCH requirement of the current cell according to the standard TCH comprehensive utilization rate and the voice telephone traffic in the busy hour unit time of the cell.
In a specific implementation, step 31 may specifically include:
sub-step 3101, obtaining the data equivalent telephone traffic in busy hour unit time according to the total time of the PDCH occupied by the busy hour unit time of the current cell.
Data equivalent traffic T in busy hour unit timei DThe calculation formula of (a) is as follows:
Figure GDA0003311157410000101
wherein, ti PDCHIs a CELL CELLiBusy hour the total duration of the PDCH (Packet Data CHannel) occupied by Data traffic per hour. t is ti PDCHThe CELL CELL can be calculated firstiThe inner data service sums the occupation duration of each PDCH with the occupation duration of each PDCH.
And a substep 3102, obtaining the TCH requirement of the current cell according to the voice traffic in the busy hour unit time, the data equivalent traffic in the busy hour unit time and the standard TCH comprehensive utilization rate.
TCH comprehensive utilization ratio RTCHThe calculation formula of (a) is as follows:
Figure GDA0003311157410000102
wherein, Ti vIs a CELL CELLiThe voice telephone traffic of busy hour unit time can be the average voice telephone traffic of busy hour per second, and the unit is Ireland; t isi DThe data equivalent telephone traffic in unit time of busy hour is the average data equivalent telephone traffic per second of busy hour, the data equivalent telephone traffic is the telephone traffic generated when the data service is equivalent to the voice service, and the unit is Ireland; vTCH(i) Is a CELL CELLiThe number of TCHs configured. The busy hour in the embodiment of the invention can refer to two high traffic periods, namely early busy hour (9:00 to 11:00) and late busy hour (19:00 to 11:00) respectively21:00)。
And when calculating the TCH requirement, the TCH comprehensive utilization rate adopts the standard TCH comprehensive utilization rate. At the known TCH comprehensive utilization rate RTCHUnder the conditions of voice telephone traffic in busy hour unit time and data equivalent telephone traffic in busy hour unit time, the CELL CELL can be reversely deduced by the above formulaiMedium TCH demand VTCH(i)。
And step 32, obtaining the PDCH requirement of the current cell according to the multiplexing degree of the standard PDCH and the data transmission quantity in the busy hour unit time of the current cell.
In a specific implementation, step 32 may specifically include:
substep 3201, obtaining the average concurrent number of TBFs in the unit time of busy hour of the current cell.
And a substep 3202 of obtaining the PDCH requirement of the current cell according to the TBF number and the multiplexing degree of the standard PDCH.
PDCH reuse degree RPDCHThe calculation formula of (a) is as follows:
Figure GDA0003311157410000111
wherein, VPDCH(i) Is a CELL CELLiA configured number of PDCHs, which may include EGPRSPDCH and GPRS PDCHs;
Figure GDA0003311157410000112
the TBFs may include EGPRS TBFs and GPRS TBFs, which are the average number of concurrent TBFs in the downlink per unit time in busy hours.
PDCH reuse degree R when calculating PDCH demandPDCHStandard PDCH multiplexing degrees are used. The number of TBFs and the PDCH reuse degree R which are concurrent in the unit time of the known busy hourPDCHIn case of (2), the PDCH demand V can be reversely deducedPDCH(i)。
And step 33, obtaining the carrier frequency requirement of the current cell according to the TCH requirement of the current cell and the PDCH requirement of the current cell.
In a specific implementation, the carrier frequency requirement of the current cell may be the sum of a TCH requirement and a PDCH requirement, so as to ensure that the number of carrier frequencies configured in the cell can simultaneously ensure voice service quality and data service quality.
Step 602, obtaining the total carrier frequency requirement in the cell interference cluster according to the carrier frequency requirement of each cell.
Step 603, obtaining the theoretical carrier frequency capacity configured in the cell interference cluster according to the standard frequency point multiplexing frequency and the planned frequency point number after frequency fading.
Cluster phi interference by celliFrequency point multiplexing frequency riComprises the following steps:
ri＝V/M
wherein, V is the carrier frequency capacity configured in the cell interference cluster, and M is the frequency point number in the cell interference cluster.
When the theoretical carrier frequency capacity is calculated, the frequency point multiplexing frequency riThe standard frequency point multiplexing frequency or the frequency point multiplexing frequency lower than the standard frequency point multiplexing frequency can be adopted. At a known frequency point, the frequency r is multiplexediAnd the number M of the frequency points in the cell interference cluster can reversely deduce the theoretical carrier frequency capacity V configured in the cell interference cluster.
Step 604, if the theoretical carrier frequency capacity is not less than the total carrier frequency requirement, evaluating that the number of the proposed frequency points after frequency withdrawal meets the requirement; otherwise, evaluating that the number of the proposed frequency points after frequency fading does not meet the requirement.
If the number of the proposed frequency points after the frequency cancellation meets the requirement, which indicates that the frequency cancellation scheme is feasible, the frequency cancellation can be performed according to the frequency cancellation scheme.
It should be noted that specific steps in the embodiment of the present invention can be referred to the specific steps in the embodiment shown in fig. 1.
The embodiment of the invention can efficiently and accurately realize frequency fading by utilizing the evaluation standard of the frequency fading feasibility of the GSM network, thereby scientifically and reasonably replanning the frequency spectrum, ensuring the efficient utilization of frequency spectrum resources and the continuous and stable comprehensive performance of the network before and after frequency fading.
Referring to fig. 7, a flowchart of a frequency demultiplex method provided in the embodiment of the present invention is shown, where the method may specifically include the following steps:
step 701, obtaining the carrier frequency requirement of the current cell according to the standard carrier frequency load and the network traffic of the cell.
Step 702, if the number of the configured carrier frequencies of the current cell is greater than the carrier frequency requirement, reducing the number of the carrier frequencies of the current cell to be not less than the carrier frequency requirement.
In this embodiment of the present invention, step 702 may specifically include:
and step 41, if the configured TCH number of the current cell is greater than the TCH requirement, reducing the TCH number of the current cell to be not less than the TCH requirement.
And 42, if the configured PDCH number of the current cell is greater than the PDCH requirement, reducing the PDCH number of the current cell to be not less than the PDCH requirement.
In the embodiment of the invention, the TCH number and the PDCH requirement configured in the current cell can be respectively reduced to the TCH requirement and the PDCH requirement, thereby not only ensuring the network performance, but also saving the frequency spectrum resource.
Step 703, obtaining the current total number of carrier frequencies in the cell interference cluster according to the current number of carrier frequencies of each cell.
The current carrier frequency of the cell comprises TCH and PDCH, so that the current carrier frequency number of the cell is the sum of the current TCH number and PDCH number of the cell.
The cell interference cluster comprises a plurality of cells, and the total carrier frequency number configured in the cell interference cluster can be obtained by calculating the most suitable configured carrier frequency number of each cell.
Step 704, obtaining the frequency point requirement according to the standard frequency point multiplexing frequency and the current total carrier frequency number in the cell interference cluster.
Step 705, if the number of frequency points existing in the cell interference cluster is greater than the frequency point requirement, reducing the number of frequency points in the cell interference cluster to be not less than the frequency point requirement.
In the embodiment of the invention, the frequency point requirement with the lowest standard is obtained by calculation, and if the frequency point number in the cell interference cluster is reduced to the value of the frequency point requirement, the network performance can be ensured, and the efficient utilization of frequency spectrum resources can be realized to the maximum extent.
Finally, the number of carrier frequencies configured in the network should satisfy: the number of carrier frequencies configured in the cell is not less than the carrier frequency requirement of the current cell, and the total number of carrier frequencies in the cell interference cluster is not less than the theoretical carrier frequency capacity.
When the number of configured carrier frequencies of a cell is reduced or a scheme for removing the frequency of the frequency points of the cell interference cluster is generated, the network quality and the prediction of the network are needed, and the scheme can be formally implemented after the network quality prediction meets the standard.
It should be noted that specific steps in the embodiment of the present invention can be referred to specific steps in the embodiment shown in fig. 1 and fig. 6.
The embodiment of the invention can efficiently and accurately realize frequency fading by utilizing the evaluation standard of the frequency fading feasibility of the GSM network, thereby scientifically and reasonably replanning the frequency spectrum, ensuring the efficient utilization of frequency spectrum resources and the continuous and stable comprehensive performance of the network before and after frequency fading.
Referring to fig. 8, a block diagram of an apparatus for determining a frequency-fading evaluation criterion according to an embodiment of the present invention is shown, where the apparatus includes:
a first standard setting module 801, configured to set a standard frequency point multiplexing frequency according to a correspondence between a frequency point multiplexing frequency in a cell interference cluster and a network service quality.
In a preferred example of the embodiment of the present invention, the first standard setting module 801 may specifically include:
and the first relation construction unit is used for constructing the corresponding relation between the frequency point multiplexing frequency and the voice quality in the cell interference cluster.
The first relationship building unit may specifically include:
and the coverage correlation coefficient obtaining subunit is used for obtaining the coverage correlation coefficient between every two cells according to the number of the coverage grids of the cells, the number of sampling points in the grids and the receiving level strength of the sampling points in the grids.
A network structure obtaining subunit, configured to obtain, according to the coverage correlation coefficient, the number of interfering cluster cells included in the cellular network and the number of cells included in the interfering cluster cells.
And the first searching unit is used for searching the corresponding frequency point multiplexing frequency when the voice quality unstable coefficient begins to be larger than the first threshold value.
And the first setting unit is used for setting the searched frequency point multiplexing frequency as the standard frequency point multiplexing frequency.
A second standard setting module 802, configured to set a standard carrier frequency load according to a correspondence between a carrier frequency load of a cell in the cell interference cluster and a network service quality of the cell.
In this embodiment of the present invention, the second standard setting module 802 may specifically include:
and the first standard setting unit is used for setting the standard TCH comprehensive utilization rate according to the corresponding relation between the TCH comprehensive utilization rate of the cell in the cell interference cluster and the voice quality of the current cell.
The first standard setting unit may specifically include:
and the first relation construction subunit is used for constructing a corresponding relation between the TCH comprehensive utilization rate of the cell in the cell interference cluster and the voice quality of the cell.
And the first searching subunit is used for searching the corresponding TCH comprehensive utilization rate when the voice quality instability coefficient begins to be larger than the second threshold value.
And the first setting subunit is used for setting the searched TCH comprehensive utilization rate as the standard TCH comprehensive utilization rate.
And the second standard setting unit is used for setting the standard PDCH multiplexing degree according to the corresponding relation between the PDCH multiplexing degree of the cell in the cell interference cluster and the TBF congestion rate.
The second standard setting unit may specifically include:
and the second relation construction subunit is used for constructing a corresponding relation between the PDCH reuse degree of the cell in the cell interference cluster and the TBF congestion rate.
And the second searching subunit is used for searching the corresponding PDCH multiplexing degree when the TBF congestion rate instability coefficient is greater than a third threshold value.
And the second setting subunit is used for setting the searched PDCH multiplexing degree as the standard PDCH multiplexing degree.
Referring to fig. 9, a block diagram of a frequency-fading estimation apparatus according to an embodiment of the present invention is shown, where the apparatus includes:
a first carrier frequency requirement obtaining module 901, configured to obtain a carrier frequency requirement of a current cell according to a standard carrier frequency load and a network traffic volume of the cell;
a second carrier frequency requirement obtaining module 902, configured to obtain a total carrier frequency requirement in a cell interference cluster according to a carrier frequency requirement of each cell;
a theoretical carrier frequency capacity obtaining module 903, configured to obtain the theoretical carrier frequency capacity configured in the cell interference cluster according to the standard frequency point multiplexing frequency and the proposed frequency point number after frequency fading;
an evaluation module 904, configured to evaluate that the number of the proposed frequency points after frequency dropping meets the requirement if the theoretical carrier frequency capacity is not less than the total carrier frequency requirement; otherwise, evaluating that the number of the proposed frequency points after frequency fading does not meet the requirement.
Referring to fig. 10, a block diagram of a frequency demultiplication apparatus according to an embodiment of the present invention is shown, where the apparatus includes:
a third carrier frequency requirement obtaining module 1001, configured to obtain a carrier frequency requirement of the current cell according to the standard carrier frequency load and the network traffic of the cell.
A module 1002 for reducing the number of carrier frequencies, configured to reduce the number of carrier frequencies of the current cell to be not less than the carrier frequency requirement if the number of carrier frequencies configured for the current cell is greater than the carrier frequency requirement.
In this embodiment of the present invention, the module 1002 for reducing the number of carrier frequencies may specifically include:
and the first carrier frequency number reducing unit is used for reducing the TCH number of the current cell to be not less than the TCH requirement if the TCH number configured by the current cell is greater than the TCH requirement.
And a second carrier frequency number reducing unit, configured to reduce the PDCH number of the current cell to not less than the PDCH requirement if the PDCH number configured for the current cell is greater than the PDCH requirement.
A carrier frequency number obtaining module 1003, configured to obtain a current total carrier frequency number in the cell interference cluster according to the current carrier frequency number of each cell.
A frequency point requirement obtaining module 1004, configured to obtain a frequency point requirement according to the standard frequency point multiplexing frequency and the current total number of carrier frequencies in the cell interference cluster.
A frequency dropping module 1005, configured to reduce the number of frequency points in the cell interference cluster to be not less than the frequency point requirement if the number of frequency points existing in the cell interference cluster is greater than the frequency point requirement.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (8)

1. A method for determining a frequency-fading estimation criterion, comprising:
setting a standard frequency point multiplexing frequency according to the corresponding relation between the frequency point multiplexing frequency in the cell interference cluster and the network service quality;
setting a standard carrier frequency load according to the corresponding relation between the carrier frequency load of the cell in the cell interference cluster and the network service quality of the cell;
setting a standard TCH comprehensive utilization rate according to the corresponding relation between the TCH comprehensive utilization rate of the cell in the cell interference cluster and the voice quality of the current cell;
and setting the standard PDCH reuse degree according to the corresponding relation between the PDCH reuse degree of the cell in the cell interference cluster and the TBF congestion rate.
2. The method according to claim 1, wherein the step of setting the standard frequency point multiplexing frequency according to the corresponding relationship between the frequency point multiplexing frequency in the cell interference cluster and the network service quality comprises:
constructing a corresponding relation between the frequency point multiplexing frequency and the voice quality in the cell interference cluster;
searching the corresponding frequency point multiplexing frequency when the voice quality instability coefficient is greater than a first threshold value;
and setting the searched frequency point multiplexing frequency as the standard frequency point multiplexing frequency.
3. The method according to claim 1, wherein the step of setting a standard TCH utilization according to a corresponding relationship between TCH utilization of a cell in the cell interference cluster and voice quality of a current cell comprises:
constructing a corresponding relation between TCH comprehensive utilization rate of the cell in the cell interference cluster and voice quality of the cell;
searching corresponding TCH comprehensive utilization rate when the voice quality instability coefficient is larger than a second threshold value;
and setting the searched TCH comprehensive utilization rate as the standard TCH comprehensive utilization rate.
4. The method according to claim 1, wherein said step of setting a standard PDCH reuse according to the correspondence between PDCH reuse and TBF congestion rates of cells in the cell interference cluster comprises:
constructing a corresponding relation between the PDCH reuse degree of the cell in the cell interference cluster and the TBF congestion rate;
searching the corresponding TBF congestion rate when the TBF congestion rate instability coefficient is greater than a third threshold value;
and setting the searched TBF congestion rate as the standard TBF congestion rate.
5. A method for frequency-fading estimation, comprising:
acquiring the carrier frequency requirement of the current cell according to the standard carrier frequency load and the network traffic of the cell;
acquiring total carrier frequency requirements in a cell interference cluster according to the carrier frequency requirements of each cell;
obtaining theoretical carrier frequency capacity configured in a cell interference cluster according to the standard frequency point multiplexing frequency and the planned frequency point number after frequency fading;
if the theoretical carrier frequency capacity is not less than the total carrier frequency requirement, evaluating that the number of the proposed frequency points after frequency fading meets the requirement; otherwise, evaluating that the number of the proposed frequency points after frequency fading does not meet the requirement.
6. The method of claim 5, wherein the step of obtaining the carrier frequency requirement of the current cell according to the standard carrier frequency load and the network traffic of the cell comprises:
acquiring the TCH requirement of the current cell according to the comprehensive utilization rate of the standard TCH and the voice telephone traffic in the busy hour unit time of the cell;
obtaining the PDCH requirement of the current cell according to the standard PDCH reusability and the data transmission amount in the unit time of the busy hour of the current cell;
and acquiring the carrier frequency requirement of the current cell according to the TCH requirement of the current cell and the PDCH requirement of the cell.
7. An apparatus for determining a back-off evaluation criterion, comprising:
the first standard setting module is used for setting the standard frequency point multiplexing frequency according to the corresponding relation between the frequency point multiplexing frequency in the cell interference cluster and the network service quality;
a second standard setting module, configured to set a standard carrier frequency load according to a correspondence between a carrier frequency load of a cell in the cell interference cluster and a network service quality of the cell;
a first standard setting unit, configured to set a standard TCH comprehensive utilization rate according to a correspondence between a TCH comprehensive utilization rate of a cell in the cell interference cluster and a voice quality of a current cell;
and the second standard setting unit is used for setting the standard PDCH multiplexing degree according to the corresponding relation between the PDCH multiplexing degree of the cell in the cell interference cluster and the TBF congestion rate.
8. A frequency-fading estimation apparatus, comprising:
a first carrier frequency demand obtaining module, configured to obtain a carrier frequency demand of a current cell according to a standard carrier frequency load and a network traffic volume of the cell;
a second carrier frequency demand obtaining module, configured to obtain a total carrier frequency demand in the cell interference cluster according to the carrier frequency demand of each cell;
a theoretical carrier frequency capacity obtaining module, which obtains the theoretical carrier frequency capacity configured in the cell interference cluster according to the standard frequency point multiplexing frequency and the planned frequency point number after frequency fading;
the evaluation module is used for evaluating that the number of the proposed frequency points after frequency fading meets the requirement if the theoretical carrier frequency capacity is not less than the total carrier frequency requirement; otherwise, evaluating that the number of the proposed frequency points after frequency fading does not meet the requirement.
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