CN105704737A - Cell capacity evaluation method and device - Google Patents

Abstract

The invention relates to a cell capacity evaluation method and device. The method includes the following steps that: the first network parameters of a cell are obtained, wherein first network parameters comprise any three or four network parameters selected from call loss rate Gos, channel number N, traffic E, half rate channel parameter alpha and half rate traffic ratio beta; second network parameters corresponding to the first network parameters can be obtained through matching according to preset corresponding relations between the call loss rate Gos, the channel number N, the traffic E, the half rate channel parameter alpha and the half rate traffic ratio beta; and the evaluation result of the capacity of the cell is obtained according to the second network parameters. With the method and device of the invention adopted, the problem of incapability of obtaining an accurate cell capacity evaluation result and incapability of controlling the relationship between network capacity and quality by using corresponding relationships between network parameters in a traditional ERL-B table can be solved.

Description

The method of a kind of cell capacity assessment and device

Technical field

The present invention relates to GSM mobile communication voice business scope, especially relate to method and the device of the assessment of a kind of cell capacity。

Background technology

At present, industry is when the adjustment of GSM cell capacity, planning, it is common to use ERLANG B。Ireland B formula comes from many servers loss system, leaves after namely the user discover that line be busy at once；To this kind of single interactive class application of GSM speech business, owing to needing to consider the minimum bandwidth requirement of user, use Ireland B formula very reasonable。

Gsm system runs more than 10 years in the world, and order overwhelming majority operator all employs the ERLANG B based on Ireland B formula and network C S traffic load is estimated。

The ultimate principle of ERL-B method is according to live traffice amount, at the certain percent of call lost (Gos) (generally using 2%) inquiry under condition ERL-B table, the demand number of channel checked out and the current area TCH number of channel are contrasted, thus drawing community actual capacity load condition。

As it is shown in figure 1, for utilize traditional ERL-B table to carry out the schematic diagram inquired about。Make an explanation to inquiring about required Traffic Channel number under certain Gos at this。

Assuming that certain community peak hour telephone traffic is 70ERL, can inquire when Gos is 2% by the ERL-B table in Fig. 1, the Traffic Channel number required for this community is 82。

Analyze from this example, on surface, ERL-B table still can meet GSM network Capacity Assessment demand, this community 10 carrier waves of CS service needed cell configuration, consider the situation of CCH, SDCCH channel, need 11 carrier waves of configuration altogether, but, although TD network is comparatively ripe at present, but gprs service busy channel number is still very many, the ratio of most of area PS busy channel numbers and CS busy channel number all reaches a high position of 4:6, if analyzed by this standard, this community will need 10+1+3=15 carrier wave, and this substantially misfits with practical situation。

In a practical situation, in order to quickly significantly expand GSM network CS capacity, already occurring in that the application of half rate technology, after using this technology, network can open half-rate channel according to traffic load situation。The impact on opportunity is opened in this process owing to being subject to half rate, half rate traffic will be produced when Network rises to a certain degree, part TCH will be split as two TCH channels, in this case, owing to traditional ERL-B table not considering, GSM network half rate mechanism cannot obtain cell capacity assessment result accurately hence with corresponding relation between each network parameter in traditional ERL-B table, and the relation between uncontrollable network capacity and quality。

Summary of the invention

In order to solve to utilize in traditional ERL-B table the corresponding relation between each network parameter cannot obtain the problem of relation between problem and uncontrollable network capacity and the quality of cell capacity assessment result accurately, the invention provides the method for a kind of cell capacity assessment and device。

In order to solve above-mentioned technical problem, the method that the invention provides the assessment of a kind of cell capacity, method comprises the steps: to obtain the first network parameter of community, and first network parameter includes any three or four network parameters in percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta；According to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with first network parameter；The assessment result of cell capacity is obtained according to the second network parameter。

Optionally, according to percent of call lost Gos set in advance, number of channel N, telephone traffic E, corresponding relation between half-rate channel parameter alpha and half rate telephone traffic ratio beta, before coupling obtains the second network parameter corresponding with first network parameter, method also includes: according to percent of call lost Gos set in advance, number of channel N, telephone traffic E, corresponding relation between half-rate channel parameter alpha and half rate telephone traffic ratio beta creates extension ERL-B table, extension ERL-B table is that introducing half-rate channel parameter alpha and half rate telephone traffic ratio beta generate on the basis of ERL-B table。

Optionally, the corresponding relation following formula between percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta represents:

$\mathrm{Gos}=\frac{\frac{{\left(\mathrm{\βE}\right)}^{2(\mathrm{\α}*N)}}{(2\mathrm{\α}*N)!}}{{\mathrm{\Σ}}_{k=0}^{2(\mathrm{\α}*N)}\frac{{\left(\mathrm{\βE}\right)}^k}{k!}}=\frac{\frac{{\left[(1-\mathrm{\β})E\right]}^{N-(\mathrm{\α}*N)}}{[N-(\mathrm{\α}*N)]!}}{{\mathrm{\Σ}}_{k=0}^{N-(\mathrm{\α}*N)}\frac{{\left[(1-\mathrm{\β})E\right]}^k}{k!}}$

Wherein, Gos represents that the percent of call lost, N represent that the number of channel, E represent that telephone traffic, α represent half-rate channel parameter, and β represents half rate telephone traffic ratio, and the value of k is the integer between 0 to 2 (α * N) or the integer between 0 to N-(α * N)。

Optionally, the first network parameter obtaining community includes: when percent of call lost Gos, number of channel N and half-rate channel parameter alpha, correspondingly, according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with first network parameter, particularly as follows: obtain the half-rate channel parameter alpha corresponding to percent of call lost Gos according to the percent of call lost Gos coupling obtained；Half-rate channel parameter alpha coupling according to obtaining obtains the number of channel N corresponding to half-rate channel parameter alpha；According to the number of channel N obtained, coupling obtains the telephone traffic E corresponding to number of channel N and half rate telephone traffic ratio beta。

Optionally, the first network parameter obtaining community includes: when percent of call lost Gos, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, correspondingly, according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with first network parameter, particularly as follows: obtain the half-rate channel parameter alpha corresponding to percent of call lost Gos according to the percent of call lost Gos coupling obtained；Half-rate channel parameter alpha coupling according to obtaining obtains the telephone traffic E corresponding to half-rate channel parameter alpha；Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to telephone traffic E；Half rate telephone traffic ratio beta coupling according to obtaining obtains the number of channel N corresponding to half rate telephone traffic ratio beta。

Optionally, the first network parameter obtaining community includes: when percent of call lost Gos, number of channel N, telephone traffic E and half rate telephone traffic ratio beta, correspondingly, according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with first network parameter, particularly as follows: obtain the number of channel N corresponding to percent of call lost Gos according to the percent of call lost Gos coupling obtained；Number of channel N coupling according to obtaining obtains the telephone traffic E corresponding to number of channel N；Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to telephone traffic E；Half rate telephone traffic ratio beta coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to half rate telephone traffic ratio beta。

According to another aspect of the present invention, additionally provide the device of a kind of cell capacity assessment, device includes: acquisition module, for obtaining the first network parameter of community, first network parameter includes any three or four network parameters in percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta；Processing module, for according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with first network parameter；Output module, for obtaining the assessment result of cell capacity according to the second network parameter。

Optionally, device also includes arranging module, arranging module for creating extension ERL-B table according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, extension ERL-B table is that introducing half-rate channel parameter alpha and half rate telephone traffic ratio beta generate on the basis of ERL-B table。

Optionally, the corresponding relation following formula between percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta represents:

$\mathrm{Gos}=\frac{\frac{{\left(\mathrm{\βE}\right)}^{2(\mathrm{\α}*N)}}{(2\mathrm{\α}*N)!}}{{\mathrm{\Σ}}_{k=0}^{2(\mathrm{\α}*N)}\frac{{\left(\mathrm{\βE}\right)}^k}{k!}}=\frac{\frac{{\left[(1-\mathrm{\β})E\right]}^{N-(\mathrm{\α}*N)}}{[N-(\mathrm{\α}*N)]!}}{{\mathrm{\Σ}}_{k=0}^{N-(\mathrm{\α}*N)}\frac{{\left[(1-\mathrm{\β})E\right]}^k}{k!}}$

Wherein, Gos represents that the percent of call lost, N represent that the number of channel, E represent that telephone traffic, α represent half-rate channel parameter, and β represents half rate telephone traffic ratio, and the value of k is the integer between 0 to 2 (α * N) or the integer between 0 to N-(α * N)。

Optionally, the percent of call lost Gos coupling that processing module is further used for according to obtaining obtains the half-rate channel parameter alpha corresponding to percent of call lost Gos；Half-rate channel parameter alpha coupling according to obtaining obtains the number of channel N corresponding to half-rate channel parameter alpha；According to the number of channel N obtained, coupling obtains the telephone traffic E corresponding to number of channel N and half rate telephone traffic ratio beta。

Optionally, the percent of call lost Gos coupling that processing module is further used for according to obtaining obtains the half-rate channel parameter alpha corresponding to percent of call lost Gos；Half-rate channel parameter alpha coupling according to obtaining obtains the telephone traffic E corresponding to half-rate channel parameter alpha；Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to telephone traffic E；Half rate telephone traffic ratio beta coupling according to obtaining obtains the number of channel N corresponding to half rate telephone traffic ratio beta。

Optionally, the percent of call lost Gos coupling that processing module is further used for according to obtaining obtains the number of channel N corresponding to percent of call lost Gos；Number of channel N coupling according to obtaining obtains the telephone traffic E corresponding to number of channel N；Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to telephone traffic E；Half rate telephone traffic ratio beta coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to half rate telephone traffic ratio beta。

The invention has the beneficial effects as follows:

The present invention (utilizing traditional ERL-B table) in traditional cell capacity assessment adds half-rate channel parameter alpha and half rate telephone traffic ratio beta accounts for as variable, namely network parameter has 5 dimensions such as percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, when one of them dimension changes, other certain dimension also to adjust accordingly。Corresponding relation according to the first network parameter obtained and percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains the second network parameter, the equilibrium point of each network parameter, cell capacity and network quality can be held more accurately, thus obtaining cell capacity assessment result accurately。

Secondly, in traditional cell capacity assessment, (utilizing traditional ERL-B table) adds half-rate channel parameter alpha and half rate telephone traffic ratio beta, effectively reflect the Radio Resource actual bearer ability to cell capacity in particular network parameter configures, same, in particular network parameter configures, service conditions according to current community, it is possible to anti-release resource requirement capacity, thus realizing the assessment to network resource requirement；And, representing user's perception by half rate telephone traffic ratio beta, then the present invention is simultaneously achieved the comprehensive assessment result of Internet resources, cell capacity and user's perception。

Accompanying drawing explanation

Fig. 1 represents and utilizes traditional ERL-B table to carry out the schematic diagram inquired about；

Fig. 2 represents the key step flow chart of the method for embodiments of the invention small area Capacity Assessment；

Fig. 3 represents that coupling obtains the flow chart of steps of the second network parameter in embodiments of the invention when the first network parameter obtained includes percent of call lost Gos, number of channel N and half-rate channel parameter alpha；

Fig. 4 represents the number of channel N of known cell in embodiments of the invention, half rate thresholding (half-rate channel parameter) α, extension ERL-B table sublist used during the assessment supported maximum telephone traffic E in community；

Fig. 5 represents that coupling obtains the flow chart of steps of the second network parameter in embodiments of the invention when the first network parameter obtained includes percent of call lost Gos, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta；

Fig. 6 represents the peaked traffic amount E of known cell in embodiments of the invention, half rate thresholding (half-rate channel parameter) α and half rate telephone traffic ratio beta, assesses extension ERL-B table sublist used during the number of carrier wave of community demand；

Fig. 7 represents that coupling obtains the flow chart of steps of the second network parameter in embodiments of the invention when the first network parameter obtained includes percent of call lost Gos, number of channel N, telephone traffic E and half rate telephone traffic ratio beta；

Fig. 8 represents the number of channel N of known cell in embodiments of the invention, peaked traffic amount E and half rate telephone traffic ratio beta, it is determined that extension ERL-B table sublist used during half rate thresholding (half-rate channel parameter) α of community；

Fig. 9 represents the primary structure block diagram of the device of embodiments of the invention small area Capacity Assessment。

Detailed description of the invention

It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings。Although accompanying drawing showing the exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should do not limited by embodiments set forth here。On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and complete for the scope of the present disclosure can be conveyed to those skilled in the art。

As in figure 2 it is shown, be the key step flow chart of the method for embodiments of the invention small area Capacity Assessment, comprise the steps:

Step S101, obtains the first network parameter of community, and first network parameter includes any three or four network parameters in percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta。

In the present embodiment, the first network parameter of the community of acquisition can be any three or four network parameters in percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta according to actual needs。

Step S102, according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with first network parameter。

In the present embodiment, according to percent of call lost Gos set in advance, number of channel N, telephone traffic E, corresponding relation between half-rate channel parameter alpha and half rate telephone traffic ratio beta, before coupling obtains the second network parameter corresponding with first network parameter, also need to according to percent of call lost Gos set in advance, number of channel N, telephone traffic E, corresponding relation between half-rate channel parameter alpha and half rate telephone traffic ratio beta creates extension ERL-B table, wherein extension ERL-B table is that introducing half-rate channel parameter alpha and half rate telephone traffic ratio beta generate on the basis of ERL-B table。

Optionally, the corresponding relation between percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta can represent with following formula:

$\mathrm{Gos}=\frac{\frac{{\left(\mathrm{\βE}\right)}^{2(\mathrm{\α}*N)}}{(2\mathrm{\α}*N)!}}{{\mathrm{\Σ}}_{k=0}^{2(\mathrm{\α}*N)}\frac{{\left(\mathrm{\βE}\right)}^k}{k!}}=\frac{\frac{{\left[(1-\mathrm{\β})E\right]}^{N-(\mathrm{\α}*N)}}{[N-(\mathrm{\α}*N)]!}}{{\mathrm{\Σ}}_{k=0}^{N-(\mathrm{\α}*N)}\frac{{\left[(1-\mathrm{\β})E\right]}^k}{k!}}$

Wherein, Gos represents that the percent of call lost, N represent that the number of channel, E represent that telephone traffic, α represent half-rate channel parameter, and β represents half rate telephone traffic ratio, and the value of k is the integer between 0 to 2 (α * N) or the integer between 0 to N-(α * N)。

This formula can according to the formula of the percent of call lost in Erlang's formulaDrawing, wherein derivation is as follows:

For Erlang's formula, it is necessary to introduce half-rate channel parameter and half rate telephone traffic ratio (for Ericsson's equipment), it is assumed that half-rate channel parameter is α, and half rate telephone traffic ratio is β, then:

E=e_Entirely+e_Half

Wherein, N is the number of channel, and E is telephone traffic, n_EntirelyFor full speed channel number, n_HalfFor half-rate channel number, e_EntirelyFor full-rate traffic amount, e_HalfFor half rate telephone traffic, and n_Entirely、n_Half、e_Entirely、e_HalfIt is the network parameter of introducing；

It is α, full speed channel number n according to half-rate channel parameter_EntirelyRelation formula with number of channel NCan draw:

n_Entirely=N-(α * N) is 1.

n_Half=2 (N-n_Entirely)②

1. formula is substituted into the formula of percent of call lost GosDraw Gos, α, N and e_EntirelyBetween relation formula:

Wherein, Gos represents that the percent of call lost, N represent that the number of channel, α represent half-rate channel parameter, e_EntirelyRepresenting full-rate traffic amount, the value of k is the integer between 0 to N-(α * N)。

1. formula substitutes into formula 2. can draw:

n_Half=2 (α * N) are 4.

4. formula is substituted into the formula of percent of call lost GosDraw Gos, α, N and e_HalfBetween relation formula:

3. 5. can draw with formula in conjunction with formula:

Then according to E=e_Entirely+e_HalfCan be derived from half rate telephone traffic ratio beta:

e_Half=β E is 7.

e_Entirely=(1-β) E is 8.

Finally respectively by formula 7. and formula 8. substitute into formula 6. in can draw the corresponding relation formula between percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta:

$\mathrm{Gos}=\frac{\frac{{\left(\mathrm{\βE}\right)}^{2(\mathrm{\α}*N)}}{(2\mathrm{\α}*N)!}}{{\mathrm{\Σ}}_{k=0}^{2(\mathrm{\α}*N)}\frac{{\left(\mathrm{\βE}\right)}^k}{k!}}=\frac{\frac{{\left[(1-\mathrm{\β})E\right]}^{N-(\mathrm{\α}*N)}}{[N-(\mathrm{\α}*N)]!}}{{\mathrm{\Σ}}_{k=0}^{N-(\mathrm{\α}*N)}\frac{{\left[(1-\mathrm{\β})E\right]}^k}{k!}}$ ⑨

Optionally, if by formula differentiation formula 7.Substitute into formula 6. in, it is possible to obtain Gos, N, α, β and e_EntirelyRelation formula:

⑩

Optionally, if by formula differentiation formula 7.Substitute into formula 6. in, it is possible to obtain Gos, N, α, β and e_HalfRelation formula:

According to formula 10. and formulaExtension ERL-B table can be improved so that the telephone traffic E in extension ERL-B table is refined as full-rate traffic amount e_EntirelyWith half rate telephone traffic e_Half。

According to formula 9. in percent of call lost Gos, number of channel N, telephone traffic E, corresponding relation between half-rate channel parameter alpha and half rate telephone traffic ratio beta, it is possible to coupling obtains second network parameter corresponding with first network parameter。

Step S103, obtains the assessment result of cell capacity according to the second network parameter。

In the present embodiment, after obtaining the second network parameter, it is possible to obtain the assessment result of cell capacity according to the second network parameter, thus optimizing personnel can take more targeted regulating measures according to the assessment result of cell capacity。

As it is shown on figure 3, be that coupling obtains the flow chart of steps of the second network parameter, comprises the steps: in embodiments of the invention when the first network parameter obtaining community includes percent of call lost Gos, number of channel N and half-rate channel parameter alpha

Step S301, the percent of call lost Gos coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to percent of call lost Gos。

Step S302, the half-rate channel parameter alpha coupling according to obtaining obtains the number of channel N corresponding to half-rate channel parameter alpha。

Step S303, according to the number of channel N obtained, coupling obtains the telephone traffic E corresponding to number of channel N and half rate telephone traffic ratio beta。

This citing is illustrated。

It is assumed that the number of channel N of community, half rate thresholding (half-rate channel parameter) α, the supported maximum telephone traffic E in community to be assessed。

As shown in Figure 4, for the number of channel N of known cell, half rate thresholding (half-rate channel parameter) α, extension ERL-B table sublist used during the assessment supported maximum telephone traffic E in community。

Assuming that the number of channel N of the community obtained is 10, half rate thresholding α is 30%, and the flow process that coupling obtains the supported maximum telephone traffic E in community is as follows:

Assume that the percent of call lost Gos obtained is 2%, first inquire all half rate thresholding α corresponding to this percent of call lost Gos according to the percent of call lost Gos of 2%；

Then according to the half rate thresholding α that numerical value is 30% obtained, all number of channel N corresponding to this half rate thresholding α are inquired；

Secondly according to the number of channel N that numerical value is 10 obtained, the telephone traffic E corresponding to this number of channel N and half rate telephone traffic ratio beta are inquired。

Being 5.2113ERL by the maximum supported telephone traffic E of in table it can be seen that this community, half rate telephone traffic ratio beta is 43.6721%。Optimization personnel can take more targeted regulating measures according to this assessment result。

Fig. 5 represents that coupling obtains the flow chart of steps of the second network parameter, comprises the steps: in embodiments of the invention when the first network parameter obtained includes percent of call lost Gos, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta

Step S501, the percent of call lost Gos coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to percent of call lost Gos。

Step S502, the half-rate channel parameter alpha coupling according to obtaining obtains the telephone traffic E corresponding to half-rate channel parameter alpha。

Step S503, the telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to telephone traffic E。

Step S504, the half rate telephone traffic ratio beta coupling according to obtaining obtains the number of channel N corresponding to half rate telephone traffic ratio beta。

This citing is illustrated。

It is assumed that the peaked traffic amount E of community, half rate thresholding (half-rate channel parameter) α and half rate telephone traffic ratio beta, it is necessary to the number of carrier wave of assessment community demand。

As shown in Figure 6, for the peaked traffic amount E of known cell, half rate thresholding (half-rate channel parameter) α and half rate telephone traffic ratio beta, extension ERL-B table sublist used during the number of carrier wave of assessment community demand。

Assuming that the peaked traffic amount of community obtained is 15ERL, half rate thresholding α is 5%, it is desirable to half rate telephone traffic ratio beta is less than 5%, and the flow process of the number of carrier wave of assessment community demand is as follows:

Assume that the percent of call lost Gos obtained is 2%, first inquire all half rate thresholding α corresponding to this percent of call lost Gos according to the percent of call lost Gos of 2%；

Secondly according to the half rate thresholding α that numerical value is 5% obtained, the telephone traffic E corresponding to this half rate thresholding α is inquired；

Again according to the peaked traffic amount that numerical value is 15ERL obtained, inquire when total traffic is more than 15ERL corresponding minimum channel number N, by table it can be seen that at least need 23 channels；

Finally according to the half rate telephone traffic ratio beta required less than 5%, inquire in half rate telephone traffic ratio beta is less than 5% ground situation corresponding minimum channel number N, by table it can be seen that now at least need 31 channels。

After finding number of channel N, it is possible to according to Query Result, calculate the number of carrier wave of community demand, thus drawing more reasonably Adjusted Option。It is applied to the present embodiment, if the corresponding relation in ERL-B table traditionally is inquired about, namely half-rate channel parameter alpha and half rate telephone traffic ratio beta it are left out, then last assessment result has only to 23 channels, differ greatly with this assessment result, namely utilize the corresponding relation in traditional ERL-B table to carry out inquiry and exist very big error。

Fig. 7 represents that coupling obtains the flow chart of steps of the second network parameter, comprises the steps: in embodiments of the invention when the first network parameter obtained includes percent of call lost Gos, number of channel N, telephone traffic E and half rate telephone traffic ratio beta

Step S701, the percent of call lost Gos coupling according to obtaining obtains the number of channel N corresponding to percent of call lost Gos。

Step S702, the number of channel N coupling according to obtaining obtains the telephone traffic E corresponding to number of channel N。

Step S703, the telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to telephone traffic E。

Step S704, the half rate telephone traffic ratio beta coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to half rate telephone traffic ratio beta。

This citing is illustrated。

It is assumed that the number of channel N of community, peaked traffic amount E and half rate telephone traffic ratio beta, optimization personnel need to reset half rate thresholding (half-rate channel parameter) α。

As shown in Figure 8, for the number of channel N of known cell, peaked traffic amount E and half rate telephone traffic ratio beta, it is determined that extension ERL-B table sublist used during half rate thresholding (half-rate channel parameter) α of community。

Assuming that the number of channel of community obtained is 30, peaked traffic amount is 21.5ERL, it is desirable to half rate telephone traffic ratio beta is less than 15%, it is determined that the flow process of half rate thresholding α is as follows:

Assume that the percent of call lost Gos obtained is 2%, first inquire all number of channel N corresponding to this percent of call lost Gos according to the percent of call lost Gos of 2%；

Secondly according to the number of channel N that numerical value is 30 obtained, all telephone traffic E more than 21.5ERL corresponding to this number of channel N are inquired；

Again according to all telephone traffic E more than 21.5ERL, inquire all more than the half rate telephone traffic ratio beta corresponding to the telephone traffic E of 21.5ERL；

Finally according to the half rate telephone traffic ratio beta required less than 15%, inquire this half rate thresholding α corresponding to half rate telephone traffic ratio beta。

By in table it can be seen that meet simultaneously telephone traffic E more than 21.5ERL and half rate telephone traffic ratio beta less than 15% time, telephone traffic E is about 21.5ERL, and half rate telephone traffic ratio beta is about 10.57%, and now half rate thresholding α is 10%。To ask half rate telephone traffic ratio beta to reach less than 10%, by table can inquire not satisfactory item, illustrate under the requirement of the configuration in current area and half rate telephone traffic ratio beta, it is impossible to reach this telephone traffic。Because the Main Function of half rate telephone traffic ratio beta is to improve telephone traffic E, when configuration is not enough, not improving half rate telephone traffic ratio beta, telephone traffic E will be restricted。In the present embodiment, half rate thresholding α is only set to 5% by half rate telephone traffic ratio beta situation below 10%, but now the supported total traffic in community is 21.24ERL, lower than current peaked traffic amount 21.5ERL。

As it is shown in figure 9, the primary structure block diagram of the device for cell capacity assessment, this device 900 includes:

Acquisition module 901, for obtaining the first network parameter of community, first network parameter includes any three or four network parameters in percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta；Processing module 902, for according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with first network parameter；Output module 903, for obtaining the assessment result of cell capacity according to the second network parameter。

Optionally, device also includes arranging module, arranging module for creating extension ERL-B table according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, extension ERL-B table is that introducing half-rate channel parameter alpha and half rate telephone traffic ratio beta generate on the basis of ERL-B table。

Optionally, the corresponding relation following formula between percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta represents:

$\mathrm{Gos}=\frac{\frac{{\left(\mathrm{\βE}\right)}^{2(\mathrm{\α}*N)}}{(2\mathrm{\α}*N)!}}{{\mathrm{\Σ}}_{k=0}^{2(\mathrm{\α}*N)}\frac{{\left(\mathrm{\βE}\right)}^k}{k!}}=\frac{\frac{{\left[(1-\mathrm{\β})E\right]}^{N-(\mathrm{\α}*N)}}{[N-(\mathrm{\α}*N)]!}}{{\mathrm{\Σ}}_{k=0}^{N-(\mathrm{\α}*N)}\frac{{\left[(1-\mathrm{\β})E\right]}^k}{k!}}$

Wherein, Gos represents that the percent of call lost, N represent that the number of channel, E represent that telephone traffic, α represent half-rate channel parameter, and β represents half rate telephone traffic ratio, and the value of k is the integer between 0 to 2 (α * N) or the integer between 0 to N-(α * N)。

Optionally, the percent of call lost Gos coupling that processing module 902 is further used for according to obtaining obtains the half-rate channel parameter alpha corresponding to percent of call lost Gos；Half-rate channel parameter alpha coupling according to obtaining obtains the number of channel N corresponding to half-rate channel parameter alpha；According to the number of channel N obtained, coupling obtains the telephone traffic E corresponding to number of channel N and half rate telephone traffic ratio beta。

Optionally, the percent of call lost Gos coupling that processing module 902 is further used for according to obtaining obtains the half-rate channel parameter alpha corresponding to percent of call lost Gos；Half-rate channel parameter alpha coupling according to obtaining obtains the telephone traffic E corresponding to half-rate channel parameter alpha；Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to telephone traffic E；Half rate telephone traffic ratio beta coupling according to obtaining obtains the number of channel N corresponding to half rate telephone traffic ratio beta。

Optionally, the percent of call lost Gos coupling that processing module 902 is further used for according to obtaining obtains the number of channel N corresponding to percent of call lost Gos；Number of channel N coupling according to obtaining obtains the telephone traffic E corresponding to number of channel N；Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to telephone traffic E；Half rate telephone traffic ratio beta coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to half rate telephone traffic ratio beta。

Above is the preferred embodiment of the present invention, it should be pointed out that for the ordinary person of the art, can also making some improvements and modifications under without departing from principles of the invention premise, these improvements and modifications are also in protection scope of the present invention。

Claims (12)

1. the method for a cell capacity assessment, it is characterised in that described method comprises the steps:

Obtaining the first network parameter of community, described first network parameter includes any three or four network parameters in percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta；

According to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with described first network parameter；

The assessment result of described cell capacity is obtained according to described second network parameter。

2. the method for claim 1, it is characterized in that, according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, before coupling obtains the second network parameter corresponding with described first network parameter, described method also includes:

Creating extension ERL-B table according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, described extension ERL-B table is that introducing half-rate channel parameter alpha and half rate telephone traffic ratio beta generate on the basis of ERL-B table。

3. the method for claim 1, it is characterised in that the corresponding relation following formula between described percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta represents:

Wherein, Gos represents that the percent of call lost, N represent that the number of channel, E represent that telephone traffic, α represent half-rate channel parameter, and β represents half rate telephone traffic ratio, and the value of k is the integer between 0 to 2 (α * N) or the integer between 0 to N-(α * N)。

4. method as claimed in claim 3, it is characterized in that, the first network parameter obtaining community includes: when percent of call lost Gos, number of channel N and half-rate channel parameter alpha, correspondingly, described according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with described first network parameter, particularly as follows:

Percent of call lost Gos coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to described percent of call lost Gos；

Half-rate channel parameter alpha coupling according to obtaining obtains the number of channel N corresponding to described half-rate channel parameter alpha；

According to the number of channel N obtained, coupling obtains the telephone traffic E corresponding to described number of channel N and half rate telephone traffic ratio beta。

5. method as claimed in claim 3, it is characterized in that, the first network parameter obtaining community includes: when percent of call lost Gos, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, correspondingly, described according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with described first network parameter, particularly as follows:

Percent of call lost Gos coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to described percent of call lost Gos；

Half-rate channel parameter alpha coupling according to obtaining obtains the telephone traffic E corresponding to described half-rate channel parameter alpha；

Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to described telephone traffic E；

Half rate telephone traffic ratio beta coupling according to obtaining obtains the number of channel N corresponding to described half rate telephone traffic ratio beta。

6. method as claimed in claim 3, it is characterized in that, the first network parameter obtaining community includes: when percent of call lost Gos, number of channel N, telephone traffic E and half rate telephone traffic ratio beta, correspondingly, according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with described first network parameter, particularly as follows:

Percent of call lost Gos coupling according to obtaining obtains the number of channel N corresponding to described percent of call lost Gos；

Number of channel N coupling according to obtaining obtains the telephone traffic E corresponding to described number of channel N；

Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to described telephone traffic E；

Half rate telephone traffic ratio beta coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to described half rate telephone traffic ratio beta。

7. the device of a cell capacity assessment, it is characterised in that described device includes:

Acquisition module, for obtaining the first network parameter of community, described first network parameter includes any three or four network parameters in percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta；

Processing module, for according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, coupling obtains second network parameter corresponding with described first network parameter；

Output module, for obtaining the assessment result of described cell capacity according to described second network parameter。

8. device as claimed in claim 7, it is characterized in that, described device also includes arranging module, the described module that arranges is for creating extension ERL-B table according to the corresponding relation between percent of call lost Gos set in advance, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta, and described extension ERL-B table is that introducing half-rate channel parameter alpha and half rate telephone traffic ratio beta generate on the basis of ERL-B table。

9. device as claimed in claim 7, it is characterised in that the corresponding relation following formula between described percent of call lost Gos, number of channel N, telephone traffic E, half-rate channel parameter alpha and half rate telephone traffic ratio beta represents:

Wherein, Gos represents that the percent of call lost, N represent that the number of channel, E represent that telephone traffic, α represent half-rate channel parameter, and β represents half rate telephone traffic ratio, and the value of k is the integer between 0 to 2 (α * N) or the integer between 0 to N-(α * N)。

10. device as claimed in claim 9, it is characterised in that the percent of call lost Gos coupling that described processing module is further used for according to obtaining obtains the half-rate channel parameter alpha corresponding to described percent of call lost Gos；Half-rate channel parameter alpha coupling according to obtaining obtains the number of channel N corresponding to described half-rate channel parameter alpha；According to the number of channel N obtained, coupling obtains the telephone traffic E corresponding to described number of channel N and half rate telephone traffic ratio beta。

11. device as claimed in claim 9, it is characterised in that the percent of call lost Gos coupling that described processing module is further used for according to obtaining obtains the half-rate channel parameter alpha corresponding to described percent of call lost Gos；Half-rate channel parameter alpha coupling according to obtaining obtains the telephone traffic E corresponding to described half-rate channel parameter alpha；Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to described telephone traffic E；Half rate telephone traffic ratio beta coupling according to obtaining obtains the number of channel N corresponding to described half rate telephone traffic ratio beta。

12. device as claimed in claim 9, it is characterised in that the percent of call lost Gos coupling that described processing module is further used for according to obtaining obtains the number of channel N corresponding to described percent of call lost Gos；Number of channel N coupling according to obtaining obtains the telephone traffic E corresponding to described number of channel N；Telephone traffic E coupling according to obtaining obtains the half rate telephone traffic ratio beta corresponding to described telephone traffic E；Half rate telephone traffic ratio beta coupling according to obtaining obtains the half-rate channel parameter alpha corresponding to described half rate telephone traffic ratio beta。