CN103096481B - The distribution method of Packet Data Channel and device - Google Patents
The distribution method of Packet Data Channel and device Download PDFInfo
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- CN103096481B CN103096481B CN201110349808.7A CN201110349808A CN103096481B CN 103096481 B CN103096481 B CN 103096481B CN 201110349808 A CN201110349808 A CN 201110349808A CN 103096481 B CN103096481 B CN 103096481B
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Abstract
The invention discloses a kind of Packet Data Channel distribution method and device, described method comprises: according to the business model of the different scene communities set up in advance, estimates the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community; According to described off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of described existing network community; According to described target P DCH reusing degree, calculate the PDCH channel demands quantity in described existing network community.Compared to the prior art, the Packet Data Channel distribution method that the present invention proposes and device, can more reasonably configurating channel resource.
Description
Technical field
The present invention relates to the communications field, particularly the distribution method of Packet Data Channel and device.
Background technology
Along with the development of technology, mobile communication system can provide high-quality data transmission service for user, as business such as Internet access service, web page browsing, Email and FTP (file transfer protocol (FTP)) downloads.The business demand of user is changed into two business demands of voice service and data service gradually by traditional voice service.For different business demands, need reasonably to plan the channel resource in community.
For in the voice-channel assignment scheme of voice service, the channel resource taken when carrying out voice service due to user terminal is substantially identical, that is the bandwidth that the user terminal in community takies when carrying out voice service is less and relatively fixing, therefore, can according to the traffic carrying capacity of voice service in current area, from ERLANG B, inquire the suitable channel quantity of the traffic carrying capacity of voice-over business, therefore can carry out MRP more accurately.
But for data service, because the business demand of the terminal quantity in community and each terminal is constantly change within a period of time.Therefore, communication service is diversified while, wireless access network in mobile communications network will face the assignment problem of more complicated Packet Data Channel PDCH (PacketDataChannel), if namely do not configure rational data channel according to the needs of customer service, data channel will be caused to configure not enough traffic affecting use, or channel configuration is too much, the resource input of waste operator.
In existing Packet Data Channel allocative decision, system, mainly according to the application of terminal, carries out channel allocation according to the ability of terminal, instead of distributes according to the situation of business demand.
Realizing in process of the present invention, inventor finds that in prior art, at least there are the following problems:
In existing Packet Data Channel allocative decision, do not consider the distribution situation of small data quantity type of service in existing network community, carry out channel allocation according to the ability of terminal, therefore the load-carrying efficiency of Packet Data Channel is lower.
Summary of the invention
In view of this, main purpose of the present invention is the distribution method providing a kind of Packet Data Channel, can improve the load-carrying efficiency of Packet Data Channel.
Another object of the present invention is to the distributor that a kind of Packet Data Channel is provided, can the accurate load-carrying efficiency improving Packet Data Channel.
For achieving the above object, technical scheme of the present invention is achieved in that
A distribution method for Packet Data Channel, the method comprises:
According to the business model of the different scene communities set up in advance, estimate the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community;
According to described off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of described existing network community;
According to described target P DCH reusing degree and add up the existing network enhanced packet data channel EPDCH quantity allotted of acquisition, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree in advance, calculate the PDCH channel demands quantity in described existing network community.
A distributor for Packet Data Channel, comprising:
Estimation unit, according to the business model of the different scene communities set up in advance, estimates the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community, described PDCH reusing degree is sent to the first computing unit;
Described first computing unit, for after receiving described PDCH reusing degree, according to described off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of described existing network community, and described target P DCH reusing degree is sent to the second computing unit;
Described second computing unit, for according to the described target P DCH reusing degree received and existing network enhanced packet data channel EPDCH quantity allotted, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and the existing network BPDCH reusing degree of adding up acquisition in advance, calculate the PDCH channel demands quantity in described existing network community.
Visible, adopt technical scheme of the present invention, according to the business model of the different scene communities set up in advance, estimate the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community, according to off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of existing network community, according to target P DCH reusing degree and the existing network enhanced packet data channel EPDCH quantity allotted of monitoring acquisition in advance, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree, calculate the PDCH channel demands quantity in existing network community.Compare with existing Packet Data Channel allocative decision, the distribution method of the Packet Data Channel that the present invention proposes and device, consider distribution situation and the PDCH utilization ratio of small data quantity type of service in existing network community, operator can carry out the resource of reasonable distribution Packet Data Channel according to the distribution situation of different types of service and PDCH utilization ratio.
Accompanying drawing explanation
Fig. 1 is the distribution method flow chart of Packet Data Channel of the present invention.
Fig. 2 is the method flow diagram that the present invention sets up the business model of different scene community.
Fig. 3 is the flow chart of a kind of implementation method of step 101 in the present invention.
Fig. 4 is Packet Data Channel distributor structural representation of the present invention.
Embodiment
For problems of the prior art, propose distribution method and the device of the Packet Data Channel after a kind of improvement in the present invention, the load-carrying efficiency of Packet Data Channel can be improved.
For make technical scheme of the present invention clearly, understand, to develop simultaneously embodiment referring to accompanying drawing, scheme of the present invention be described in further detail.
Fig. 1 is the distribution method flow chart of Packet Data Channel of the present invention.As shown in Figure 1, comprise the following steps:
Step 101, according to the business model of the different scene communities set up in advance, estimates the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community.
Before this step, the present invention proposes the method for the business model setting up different scene community further, and Fig. 2 is the method flow diagram that the present invention sets up the business model of different scene community.As shown in Figure 2, described method comprises the steps:
Step 201, according to the division rule pre-set, is divided into the scene community that two or more is different, obtains the PDCH reusing degree of each scene community by existing network, wherein, and the PDCH reusing degree that different scene communities is corresponding different.
Because the network run in existing network zones of different has the business model of different scene community, therefore in this step, according to the division rule pre-set, existing network is divided into the scene community that two or more is different.Such as existing network is divided into campus district, residential block, shopping centre and industrial area.And user distribution in different scene communities and service distribution different, such as in industrial area, the distribution of FTP downloading service is more, in the district of campus then QQ and Fetion service distribution more, therefore different PDCH reusing degrees can be obtained in different scene communities, the extent for multiplexing of PDCH reusing degree reflection PDCH channel, namely has how many users jointly to use same PDCH channel at one time.
Step 202, gathers by the Gb Interface between base station controller BSC and GPRS serving GPRS support node SGSN the bandwidth sample that each scene community needs.
In this step, run for existing network, the bandwidth needed in each scene community is not a changeless numerical value, and it has the wave characteristic of stochastic variable, and under different PDCH reusing degrees, the bandwidth needed in each scene community has different wave characteristics.The bandwidth sample that each scene community needs is gathered by the Gb Interface between base station controller BSC and GPRS serving GPRS support node SGSN, the wave characteristic of the bandwidth sample needed in scene community can be obtained, such as, at the bandwidth sample that the scene community that Gb Interface gathers needs, the bandwidth sample that obtaining needs in this scene community has the characteristic of normal distribution, but not getting rid of the bandwidth sample needed in this scene community has exponential distribution or other wave characteristics.
Step 203, according to bandwidth sample, calculates the probability distribution parameters of the bandwidth sample of scene community.
Particularly, the probability distribution parameters of described bandwidth sample can be the variance of described bandwidth sample.According to the bandwidth sample needed in each scene community that step 202 obtains, calculate the probability distribution parameters of the bandwidth sample of described scene community.The bandwidth sample that the scene community that such as can gather at Gb Interface needs, the then variance of bandwidth sample according to described bandwidth sample calculation.
Step 204, sets up the PDCH reusing degree of scene community and the corresponding relation of probability distribution parameters.
According to above-mentioned step 201 ~ 204, before estimation meets the off-line Packet Data Channel PDCH reusing degree of different business bandwidth demand in existing network community, set up the business model of different scene community in advance, obtain the PDCH reusing degree of different scene community and the corresponding relation of probability distribution parameters, for estimating that the off-line PDCH reusing degree of existing network community provides foundation.
In a particular embodiment of the present invention, the implementation of above-mentioned steps 101 has a variety of, and such as, Fig. 3 is the flow chart of a kind of implementation method of step 101 in the present invention.As shown in Figure 3, step 101 realizes by step as described below:
Step 301, according to the bandwidth that the different business measured in advance needs, and the ratio that different business occupies in existing network community, calculate the average bandwidth that existing network community needs.
In this step, first measure the bandwidth of different service needed, such as, the bandwidth that ftp business needs is 90Kbps; The bandwidth of Fetion service needed is 80Kbps; The bandwidth of QQ service needed is 70Kbps.And, the ratio that different business is occupied in existing network community can also be measured in this step by the Gb Interface between base station controller BSC from GPRS serving GPRS support node SGSN, such as, the ratio that ftp business occupies in the total traffic of existing network community is 30%; The ratio of occupying in the total traffic of Fetion business in existing network community is 30%; The ratio of occupying in the total traffic of QQ business in existing network community is 40%, then the average bandwidth that calculating needs in existing network community is: 90Kbps × 30%+80Kbps × 30%+70Kbps × 40%=79Kbps.
Step 302, according to described average bandwidth, and the described probability distribution parameters corresponding with each described PDCH reusing degree, calculate the probability that the described probability distribution parameters corresponding with each described PDCH reusing degree meets described average bandwidth, obtain the Making by Probability Sets that the described probability distribution parameters corresponding with each described PDCH reusing degree meets described average bandwidth.
In this step, according to described average bandwidth, and the described probability distribution parameters corresponding with each described PDCH reusing degree, the probability of described average bandwidth is met according to the probability distribution parameters that following formulae discovery is corresponding with each described PDCH reusing degree:
wherein, x ' is the average bandwidth of described bandwidth sample, and σ is the variance of described bandwidth sample.
The probability meeting average bandwidth due to probability distribution parameters that PDCH reusing degree is corresponding with described PDCH reusing degree claims inverse relation, and namely PDCH reusing degree is less, and the probability that the probability distribution parameters corresponding with described PDCH reusing degree meets average bandwidth is larger; PDCH reusing degree is larger, and the probability that the probability distribution parameters corresponding with described PDCH reusing degree meets average bandwidth is less.Such as, suppose that the average bandwidth that existing network community needs is 79Kbps, learn through above-mentioned formulae discovery, the probability that the probability distribution parameters corresponding with PDCH reusing degree 2 meets average bandwidth is 90%; The probability that the probability distribution parameters corresponding with PDCH reusing degree 3 meets average bandwidth is 70%; The probability that the probability distribution parameters corresponding with PDCH reusing degree 4 meets average bandwidth is 40%.
Step 303, chooses and is more than or equal to probability minimum in all probability of predetermined threshold value from described Making by Probability Sets, using described PDCH reusing degree corresponding for described minimum probability as the described PDCH reusing degree meeting different business bandwidth demand in existing network community.
In this step, suppose that predetermined threshold value is 60%, choose from described Making by Probability Sets and be more than or equal to probability 70% minimum in all probability of predetermined threshold value, using the described PDCH reusing degree 3 of described minimum probability 70% correspondence as the described PDCH reusing degree meeting different business bandwidth demand in existing network community.
Step 102, according to off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of existing network community.
In this step, according to off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, draw target P DCH reusing degree according to following formulae discovery:
Target P DCH reusing degree=off-line PDCH reusing degree × target P DCH utilization ratio/existing network PDCH utilization ratio.
Step 103, according to target P DCH reusing degree and add up the existing network enhanced packet data channel EPDCH quantity allotted of acquisition, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree in advance, calculate the PDCH channel demands quantity in existing network community.
In this step, according to target P DCH reusing degree and add up the existing network enhanced packet data channel EPDCH quantity allotted of acquisition, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree in advance, draw the PDCH channel demands quantity in described community according to following formulae discovery:
PDCH channel demands quantity=(existing network EPDCH quantity allotted × existing network EPDCH reusing degree)/target P DCH reusing degree+K (existing network ordinary packet data channel BPDCH quantity allotted × existing network BPDCH reusing degree)/target P DCH reusing degree, wherein, K is equivalent coefficient BPDCH being equivalent to EPDCH pre-set; EPDCH is the data channel of EDGE (EnhancedDataRateforGSMEvolution) network; BPDCH is the data channel of GPRS (GeneralPacketRadioService) network.
According to above-mentioned description, by above-mentioned step 101 ~ 103, the distribution of Packet Data Channel can be realized, consider distribution situation and the PDCH utilization ratio of different service types in existing network community in the inventive solutions, operator can carry out the resource of reasonable distribution Packet Data Channel according to the distribution situation of different types of service, can improve the load-carrying efficiency of Packet Data Channel.
Preferably, after calculating the PDCH channel demands quantity in described existing network community, comprise further in the inventive solutions:
Step 104, judges whether described PDCH channel demands quantity is greater than the maximum PDCH channel quantity pre-set.
In this step, described maximum PDCH channel quantity can be arranged in advance, also can draw according to following formulae discovery: maximum PDCH channel quantity=carrier frequency quantity × 8-control channel quantity-voice service channel quantity.
Wherein, for voice service channel quantity, according to the traffic carrying capacity of voice service in current area, the suitable channel quantity of the traffic carrying capacity of voice-over business can be inquired from ERLANG B; For control channel quantity, can be precalculate the channel quantity of the BCCH channel of broadcast control obtained and the channel quantity of Separate Dedicated Control Channel SDCCH.
Step 105, if PDCH channel demands quantity is more than or equal to the maximum PDCH channel quantity pre-set, then carries out the dilatation of PDCH channel by existing network community.
In this step, if PDCH channel demands quantity is more than or equal to the maximum PDCH channel quantity pre-set, by the PDCH channel of existing network cell capacity-enlarging predetermined number, also can draw according to following formulae discovery: PDCH channel dilatation quantity=PDCH channel demands quantity-maximum PDCH channel quantity.
Step 106, if PDCH channel demands quantity is less than the maximum PDCH channel quantity pre-set, then carries out PDCH channel by existing network community and subtracts appearance.
The Packet Data Channel distribution method that the present invention proposes, according to the business model of the different scene communities set up in advance, estimate the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community, according to off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of existing network community, according to target P DCH reusing degree and the existing network enhanced packet data channel EPDCH quantity allotted of monitoring acquisition in advance, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree, calculate the PDCH channel demands quantity in existing network community.Compare with existing Packet Data Channel allocative decision, the distribution method of the Packet Data Channel that the present invention proposes, consider distribution situation and the PDCH utilization ratio of small data quantity type of service in existing network community, operator can carry out the resource of reasonable distribution Packet Data Channel according to the distribution situation of different types of service and PDCH utilization ratio.
Fig. 4 is Packet Data Channel distributor structural representation of the present invention.As shown in Figure 4, comprising:
Estimation unit 401, according to the business model of the different scene communities set up in advance, estimates the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community, described PDCH reusing degree is sent to the first computing unit 402;
Described first computing unit 402, for after receiving described PDCH reusing degree, according to described off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of described existing network community, and described target P DCH reusing degree is sent to the second computing unit 403;
Described second computing unit 403, for according to the described target P DCH reusing degree that receives and the existing network enhanced packet data channel EPDCH quantity allotted of adding up acquisition in advance, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree, calculate the PDCH channel demands quantity in described existing network community.
Further, described device also comprises:
Division unit 404, for the division rule that basis pre-sets, described existing network is divided into the scene community that two or more is different, obtain the PDCH reusing degree of each described scene community, and each described PDCH reusing degree is sent to set up unit 405, wherein, the described PDCH reusing degree that different described scene communities is corresponding different
Collecting unit 406, for being gathered the bandwidth sample that each described scene community needs by the Gb Interface between base station controller BSC and GPRS serving GPRS support node SGSN, sends to described 3rd computing unit 407 by each described bandwidth sample;
Described 3rd computing unit 407, for according to each described bandwidth sample that receives, calculates the probability distribution parameters of the described bandwidth sample of each described scene community, and each described probability distribution parameters is sent to and describedly set up unit 405;
Describedly set up unit 405, for after receiving each described PDCH reusing degree and described probability distribution parameters, set up the described PDCH reusing degree of each described scene community and the corresponding relation of described probability distribution parameters, and the corresponding relation of each described PDCH reusing degree and described probability distribution parameters is sent to described estimation unit 401.
Further, described estimation unit 401 comprises further:
Computation subunit 4011, for the bandwidth needed according to the different business measured in advance, and the ratio that described different business occupies in described existing network community, calculate the average bandwidth that described existing network community needs;
Described computation subunit 4011, also for according to described average bandwidth, and the described probability distribution parameters corresponding with each described PDCH reusing degree, calculate the probability that the described probability distribution parameters corresponding with each described PDCH reusing degree meets described average bandwidth, obtain the Making by Probability Sets that the described probability distribution parameters corresponding with each described PDCH reusing degree meets described average bandwidth, described Making by Probability Sets is sent to and chooses subelement 4012;
Describedly choose subelement 4012, probability minimum in all probability of predetermined threshold value is more than or equal to, using described PDCH reusing degree corresponding for described minimum probability as the described PDCH reusing degree meeting different business bandwidth demand in existing network community for choosing from described Making by Probability Sets.
Further, described second computing unit 403, specifically for according to described bandwidth sample, calculates the variance of described bandwidth sample.
Further, described computation subunit 4011, meets the probability of described average bandwidth specifically for the probability distribution parameters corresponding with each described PDCH reusing degree according to following formulae discovery:
wherein, x ' is the average bandwidth of described bandwidth sample, and σ is the variance of described bandwidth sample.
Further, described first computing unit 402, specifically for specifically for drawing described target P DCH reusing degree according to following formulae discovery:
Target P DCH reusing degree=off-line PDCH reusing degree × target P DCH utilization ratio/existing network PDCH utilization ratio.
Further, described second computing unit 403, specifically for drawing the PDCH channel demands quantity in described existing network community according to following formulae discovery:
PDCH channel demands quantity=(existing network EPDCH quantity allotted × existing network EPDCH reusing degree)/target P DCH reusing degree+K (existing network ordinary packet data channel BPDCH quantity allotted × existing network BPDCH reusing degree)/target P DCH reusing degree, wherein, K is equivalent coefficient BPDCH being equivalent to EPDCH pre-set.
Further, described device also comprises judging unit 408 and dilatation unit 409;
Described second computing unit 403, also for the described PDCH channel demands quantity in described existing network community is sent to described judging unit 408;
Described judging unit 408, for after receiving described PDCH channel demands quantity, judge whether described PDCH channel demands quantity is greater than the maximum PDCH channel quantity pre-set, if described PDCH channel demands quantity is more than or equal to the maximum PDCH channel quantity pre-set, then send a dilatation instruction to described dilatation unit 409.
Described dilatation unit 409, for after receiving described dilatation instruction, carries out the dilatation of PDCH channel by described existing network community.
Further, described device also comprise subtract hold unit 410;
Described judging unit 408, also for when described PDCH channel demands quantity is less than the maximum PDCH channel quantity pre-set, holds unit 410 and sends one to described subtracting and subtract appearance instruction;
Described subtracting holds unit 410, for after subtracting appearance instruction described in receiving, PDCH channel is carried out in described existing network community and subtracts appearance.
The Packet Data Channel distributor that the present invention proposes, estimation unit is according to the business model of the different scene communities set up in advance, estimate the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community, first computing unit is according to off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of existing network community, second computing unit is according to target P DCH reusing degree and the existing network enhanced packet data channel EPDCH quantity allotted of monitoring acquisition in advance, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree, calculate the PDCH channel demands quantity in existing network community.Compare with existing Packet Data Channel allocative decision, the distributor of the Packet Data Channel that the present invention proposes, consider distribution situation and the PDCH utilization ratio of small data quantity type of service in existing network community, operator can carry out the resource of reasonable distribution Packet Data Channel according to the distribution situation of different types of service and PDCH utilization ratio.
The specific works flow process of Fig. 4 shown device embodiment please refer to the respective description in embodiment of the method shown in Fig. 1, repeats no more.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (18)
1. a Packet Data Channel distribution method, is characterized in that, comprising:
According to the business model of the different scene communities set up in advance, estimate the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community;
According to described off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of described existing network community;
According to described target P DCH reusing degree and add up the existing network enhanced packet data channel EPDCH quantity allotted of acquisition, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree in advance, calculate the PDCH channel demands quantity in described existing network community.
2. method according to claim 1, is characterized in that, in the business model of the different scene communities that described basis is set up in advance, before estimating to meet the off-line Packet Data Channel PDCH reusing degree of different business bandwidth demand in existing network community, also comprises:
According to the division rule pre-set, described existing network is divided into the scene community that two or more is different, obtains the PDCH reusing degree of each described scene community, wherein, the described PDCH reusing degree that different described scene communities is corresponding different;
The bandwidth sample that each described scene community needs is gathered by the Gb Interface between base station controller BSC and GPRS serving GPRS support node SGSN;
According to each described bandwidth sample, calculate the probability distribution parameters of each described bandwidth sample;
Set up the described PDCH reusing degree of each described scene community and the corresponding relation of described probability distribution parameters.
3. method according to claim 2, is characterized in that, the business model of the different scene communities that described basis is set up in advance, estimates the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community, comprising:
According to the bandwidth that the different business measured in advance needs, and the ratio that described different business occupies in described existing network community, calculate the average bandwidth that described existing network community needs;
According to described average bandwidth, and the described probability distribution parameters corresponding with each described PDCH reusing degree, calculate the probability that the described probability distribution parameters corresponding with each described PDCH reusing degree meets described average bandwidth, obtain the Making by Probability Sets that the described probability distribution parameters corresponding with each described PDCH reusing degree meets described average bandwidth;
Choose from described Making by Probability Sets and be more than or equal to probability minimum in all probability of predetermined threshold value, using described PDCH reusing degree corresponding for described minimum probability as the described PDCH reusing degree meeting different business bandwidth demand in existing network community.
4. method according to claim 3, is characterized in that, described according to each described bandwidth sample, calculates the probability distribution parameters of each described bandwidth sample, comprising:
According to each described bandwidth sample, calculate the variance of each described bandwidth sample.
5. method according to claim 4, is characterized in that, the described probability distribution parameters corresponding with each described PDCH reusing degree according to following formulae discovery meets the probability of described average bandwidth:
wherein, x is bandwidth sample, and x ' is the average bandwidth of described bandwidth sample, and σ is the variance of described bandwidth sample.
6. method according to claim 1, is characterized in that, draws described target P DCH reusing degree according to following formulae discovery:
Target P DCH reusing degree=off-line PDCH reusing degree × target P DCH utilization ratio/existing network PDCH utilization ratio.
7. method according to claim 1, is characterized in that, draws the PDCH channel demands quantity in described existing network community according to following formulae discovery:
PDCH channel demands quantity=(existing network EPDCH quantity allotted × existing network EPDCH reusing degree)/target P DCH reusing degree+K (existing network ordinary packet data channel BPDCH quantity allotted × existing network BPDCH reusing degree)/target P DCH reusing degree, wherein, K is equivalent coefficient BPDCH being equivalent to EPDCH pre-set.
8. method according to claim 1, it is characterized in that, described according to described target P DCH reusing degree and add up the existing network enhanced packet data channel EPDCH quantity allotted of acquisition, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and existing network BPDCH reusing degree in advance, after calculating the PDCH channel demands quantity in described existing network community, also comprise:
Judge whether described PDCH channel demands quantity is greater than the maximum PDCH channel quantity pre-set, if described PDCH channel demands quantity is more than or equal to the maximum PDCH channel quantity pre-set, then the dilatation of PDCH channel is carried out in described existing network community.
9. method according to claim 8, is characterized in that, also comprises:
If described PDCH channel demands quantity is less than the maximum PDCH channel quantity pre-set, then PDCH channel is carried out in described existing network community and subtract appearance.
10. a Packet Data Channel distributor, is characterized in that, comprising:
Estimation unit, according to the business model of the different scene communities set up in advance, estimates the off-line Packet Data Channel PDCH reusing degree meeting different business bandwidth demand in existing network community, described PDCH reusing degree is sent to the first computing unit;
Described first computing unit, for after receiving described PDCH reusing degree, according to described off-line PDCH reusing degree, and the target P DCH utilization ratio preset and the existing network PDCH utilization ratio measuring acquisition in advance, calculate the target P DCH reusing degree of described existing network community, and described target P DCH reusing degree is sent to the second computing unit;
Described second computing unit, for according to the described target P DCH reusing degree received and existing network enhanced packet data channel EPDCH quantity allotted, existing network EPDCH reusing degree, existing network ordinary packet data channel BPDCH quantity allotted and the existing network BPDCH reusing degree of adding up acquisition in advance, calculate the PDCH channel demands quantity in described existing network community.
11. devices according to claim 10, is characterized in that, described device also comprises:
Division unit, for the division rule that basis pre-sets, described existing network is divided into the scene community that two or more is different, obtain the PDCH reusing degree of each described scene community, and each described PDCH reusing degree is sent to set up unit, wherein, the described PDCH reusing degree that different described scene communities is corresponding different
Collecting unit, for being gathered the bandwidth sample that each described scene community needs by the Gb Interface between base station controller BSC and GPRS serving GPRS support node SGSN, sends to the 3rd computing unit by each described bandwidth sample;
Described 3rd computing unit, for according to each described bandwidth sample that receives, calculates the probability distribution parameters of the described bandwidth sample of each described scene community, and each described probability distribution parameters is sent to and set up unit;
Describedly set up unit, for after receiving each described PDCH reusing degree and described probability distribution parameters, set up the described PDCH reusing degree of each described scene community and the corresponding relation of described probability distribution parameters, and the corresponding relation of each described PDCH reusing degree and described probability distribution parameters is sent to described estimation unit.
12. devices according to claim 11, is characterized in that, described estimation unit comprises:
Computation subunit, for the bandwidth needed according to the different business measured in advance, and the ratio that described different business occupies in described existing network community, calculate the average bandwidth that described existing network community needs;
Described computation subunit, also for according to described average bandwidth, and the described probability distribution parameters corresponding with each described PDCH reusing degree, calculate the probability that the described probability distribution parameters corresponding with each described PDCH reusing degree meets described average bandwidth, obtain the Making by Probability Sets that the described probability distribution parameters corresponding with each described PDCH reusing degree meets described average bandwidth, described Making by Probability Sets is sent to and chooses subelement;
Describedly choose subelement, probability minimum in all probability of predetermined threshold value is more than or equal to, using described PDCH reusing degree corresponding for described minimum probability as the described PDCH reusing degree meeting different business bandwidth demand in existing network community for choosing from described Making by Probability Sets.
13. devices according to claim 12, is characterized in that, described 3rd computing unit, specifically for according to each described bandwidth sample, calculate the variance of each described bandwidth sample.
14. devices according to claim 13, is characterized in that, described computation subunit, meet the probability of described average bandwidth specifically for the probability distribution parameters corresponding with each described PDCH reusing degree according to following formulae discovery:
wherein, x is bandwidth sample, and x ' is the average bandwidth of described bandwidth sample, and σ is the variance of described bandwidth sample.
15. devices according to claim 10, is characterized in that, described first computing unit, specifically for drawing described target P DCH reusing degree according to following formulae discovery:
Target P DCH reusing degree=off-line PDCH reusing degree × target P DCH utilization ratio/existing network PDCH utilization ratio.
16. devices according to claim 10, is characterized in that, described second computing unit, specifically draw the PDCH channel demands quantity in described existing network community according to following formulae discovery:
PDCH channel demands quantity=(existing network EPDCH quantity allotted × existing network EPDCH reusing degree)/target P DCH reusing degree+K (existing network ordinary packet data channel BPDCH quantity allotted × existing network BPDCH reusing degree)/target P DCH reusing degree, wherein, K is equivalent coefficient BPDCH being equivalent to EPDCH pre-set.
17. devices according to claim 10, is characterized in that, described device also comprises judging unit and dilatation unit;
Described second computing unit, also for the described PDCH channel demands quantity in described existing network community is sent to judging unit;
Described judging unit, for after receiving described PDCH channel demands quantity, judge whether described PDCH channel demands quantity is greater than the maximum PDCH channel quantity pre-set, if described PDCH channel demands quantity is more than or equal to the maximum PDCH channel quantity pre-set, then send a dilatation instruction to described dilatation unit;
Described dilatation unit, for after receiving described dilatation instruction, carries out the dilatation of PDCH channel by described existing network community.
18. devices according to claim 17, is characterized in that, described device also comprises and subtracts appearance unit;
Described judging unit, also for when described PDCH channel demands quantity is less than the maximum PDCH channel quantity pre-set, holds unit and sends one to described subtracting and subtract appearance instruction;
Describedly subtract appearance unit, for after subtracting described in receiving and holding instruction, PDCH channel is carried out in described existing network community and subtracts appearance.
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