CN103441865A - Method and system for managing IP addresses, BRASes and Portal server - Google Patents
Method and system for managing IP addresses, BRASes and Portal server Download PDFInfo
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- CN103441865A CN103441865A CN2013103505982A CN201310350598A CN103441865A CN 103441865 A CN103441865 A CN 103441865A CN 2013103505982 A CN2013103505982 A CN 2013103505982A CN 201310350598 A CN201310350598 A CN 201310350598A CN 103441865 A CN103441865 A CN 103441865A
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Abstract
The invention discloses a method and system for managing IP addresses, BRASes and a Portal server. When the number of access users exceeds the number of the IP addresses preset by the BRASes, the BRASes send requests to the Portal server to add the IP addresses. The Portal server enquires of other BRASes belonging to the Portal server about the using conditions of the IP addresses, and one BRAS is selected from the BRASes returning unoccupied IP address conditions and is required to add the IP addresses. IP address information stored by the Portal server is updated by the Portal server and is issued to the BRAS required to add the IP addresses, and the BRAS updates the IP address information stored by the BRAS. Through the method, the IP address information of all the BRASes in a WLAN is dynamically balanced, more IP addresses are distributed to the BRASes with more access users, and the overall access capacity of the network is improved. In addition, the IP address information is continuously redistributed among the BRASes, the IP addresses of all the BRASes can reach the stable state based on the number of the access users, and the optimized distribution of the IP addresses is achieved.
Description
Technical field
The present invention relates to the WLAN access technology, espespecially a kind of method of management ip address, system and Broadband Remote Access Server (BRAS, Broadband Remote Access Server) and Portal server.
Background technology
In WiMAX (WLAN, Wireless LAN) network, BRAS is positioned at the marginal layer of backbone network, completes to the user radio broadband control work of i.e. WLAN access.When WLAN user is linked into access focus (AP, Access Point) time, BRAS arranges agreement (DHCP by DynamicHost, Dynamic Host Configuration Protocol) service, by the IP address assignment in its resource pool, to user terminal, user terminal completes follow-up authentication and interworking after obtaining the IP address.
At present, the framework of three large operator wlan networks is, at the other Portal server of hanging of BRAS, for managing user authentication, charging work.After user's access carrier service set (SSID), the DHCP service on BRAS is user terminal Random assignment public network IP address from its public network IP address pond.After user terminal obtains public network IP address, user terminal sends authentication request to Portal server, and authentication arranges and allows this IP access the Internet by rear BRAS.Pass through if unverified, can be tackled by BRAS when user terminal attempts to access other network address of the Internet, and be redirected to Portal server.
Fig. 1, for existing wlan network configuration diagram, as shown in Figure 1, hangs with a plurality of AP focuses under every BRAS, for managing user's access of zones of different.The public network IP address list is preserved in DHCP service on every BRAS.This public network IP address list, not only for to user terminal, distributing public network IP address, needs the authentication request that user terminal is initiated to carry out preliminary treatment simultaneously.So-called preliminary treatment is exactly that authentication request to mail to the aaa server (not shown in figure 1) via this BRAS is judged, when its source IP address is present in the IP address list of this BRAS, allows it to pass through; If its source IP address does not belong to the IP address in the IP address list of this BRAS, be defined as illegal request and refuse it and pass through.
In existing wlan network framework, can set in advance each BRAS IP address of equipment list; Accordingly, also can store the ID of each BRAS and the list of corresponding IP address list thereof on Portal server, for BRAS, distribute access user IP address and user's debarkation authentication.
But the regional number of users that covers due to each BRAS equipment is dynamic change in time, and, because this regional access user quantity of a variety of causes also can change.When certain BRAS access user quantity increases, in the time of can distributing public network IP address quantity over default BRAS, the user of rear access can't be assigned to public network IP address, thereby can't log in and access the Internet; And now, the number of users of the same time access of other BRAS may be less, so just caused the waste of IP address.In addition, fixing IP number of addresses has also caused BRAS to be estimated access user quantity, also can't dynamically adjust the IP number of addresses.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of method, system and BRAS and Portal server of management ip address, can reach the dynamic equilibrium of IP address in the wlan network framework, guarantee that the user can normally access the Internet.
In order to reach the object of the invention, the invention provides a kind of method of management ip address, comprising: when access user quantity surpasses the IP number of addresses that Broadband Remote Access Server BRAS sets in advance, BRAS adds the IP address to the Portal server request;
Portal server is to its lower other BARS inquiries IP address utilization of hanging, and other BARS return to Portal server by the vacant IP address situation of self;
Portal server is selected a BRAS and is added the IP address to its request from the BRAS that returns to vacant IP address situation, and requested BRAS returns to corresponding vacant IP address to Portal server from the vacant IP address of self;
Portal server upgrades the IP address information that self stores, and is handed down to the BRAS that the IP address is added in request, the IP address information of this BRAS renewal self storage.
Described BRAS adds the IP address to the Portal server request and comprises: described BRAS, by an IP address relocation request, adds the IP address to the Portal server request;
Carry identify label ID, request transmission time and the request flag position of described BRAS in an IP address relocation request.
Described Portal server comprises to its lower other BARS inquiries IP address utilization of hanging:
Described Portal server is after receiving an IP address relocation request, to the inquiry request of its lower other BRAS broadcast pollings IP address utilization except the described BRAS that initiates IP address relocation request of hanging.
Described other BARS return to Portal server by the vacant IP address situation of self and comprise:
Described other BARS, the number of users that may access future based on normal distribution 3 σ principles predictions self, and after deduct the number of users of predicting, remaining vacant IP address returns to Portal server.
The number of users that described prediction self may access future comprises two groups or more, takes the most following number of users that may access of the pre-quantitation of a group that amount is maximum.
Described Portal server is selected a BRAS and adds the IP address to its request to comprise from the BRAS that returns to vacant IP address situation:
The vacant situation that described Portal server returns described other BRAS is sorted, and chooses the part IP address ratio in the BRAS that wherein vacant IP address ratio is the highest according to the preset ratio value, or chooses according to actual conditions;
Described Portal server sends the 2nd IP address relocation request to the requested BRAS selected, carry the ID of the described BRAS selected, time, the request flag position that request sends in the 2nd IP address relocation request, and vacant IP reallocation ratio.
The method also comprises: the vacant address of IP of the respective numbers that described requested BARS freezes to select;
Until adding the BRAS of IP address, described request upgraded the IP address information of self storing, described Portal server sends to delete to requested BRAS and freezes the IP Address requests, the described IP address of freezing of described requested deletion, and upgrade the IP address list of self this locality.
The present invention also provides a kind of BARS, at least comprises control module, stores memory module and the prediction module of IP address list; Wherein,
Control module, for when access user quantity surpasses the IP number of addresses self set in advance, add the IP address to the Portal server request; Receive from Portal server, update notification, upgrade the IP address information of self storage; Receive the inquiry request from Portal server, the notice prediction module; Return to corresponding vacant IP address to Portal server from the vacant IP address of self;
Prediction module, for the number of users that may access future based on normal distribution 3 σ principles predictions self, and according to the IP address list of storing in described memory module, will deduct this number of users after remaining vacant IP address return to Portal server.
The present invention also provides a kind of Portal server, at least comprises administration module, for the request receiving from the BARS of IP address requesting reallocation, to its lower other BARS inquiries IP address utilization of hanging; Select a BRAS and add the IP address to its request from the BRAS that returns to vacant IP address situation; The idle IP address information of returning according to BARS, upgrade the IP address information of self storing, and notice request is added the BRAS of IP address.
The present invention also provides a kind of system of management ip address, at least comprises under Portal server, Portal server a plurality of BARS that hang;
When access user quantity surpasses the IP number of addresses self set in advance, described BARS is as request BARS, for to the Portal server request, adding the IP address; Receive the BRAS of inquiry request, for the vacant IP address situation by self, return to Portal server; Requested BRAS, return to corresponding vacant IP address to Portal server for the vacant IP address from self; Upgrade the IP address information of self storing;
Described Portal server, for receiving the price modification IP Address requests from request BRAS, to its lower other BARS inquiries IP address utilization except request BRAS of hanging; From the BRAS that returns to vacant IP address situation, select a BRAS to add the IP address as requested BRAS and to its request; Upgrade the IP address information of self storing, and be handed down to described request BRAS.
Compared with prior art, when present invention resides in access user quantity and surpassing the IP number of addresses that BRAS sets in advance, BRAS adds the IP address to the Portal server request; Portal server is to its lower other BARS inquiries IP address utilization of hanging, and other BARS return to Portal server by the vacant IP address situation of self; Portal server is selected a BRAS and is added the IP address to its request from the BRAS that returns to vacant IP address situation, and requested BRAS returns to corresponding vacant IP address to Portal server from the vacant IP address of self; Portal server upgrades the IP address information that self stores, and is handed down to the BRAS that the IP address is added in request, the IP address information of this BRAS renewal self storage.
By the inventive method, the dynamic balanced IP address information of each BRAS in the wlan network, make the BRAS that access user quantity is many be assigned to more IP address, improved the access capability of network integral body.And, along with the constantly reallocation between BRAS of IP address information, the IP address of each BRAS will reach the stable state according to access user quantity, has also just realized the optimum distribution of IP address.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in specification, claims and accompanying drawing.
The accompanying drawing explanation
Accompanying drawing is used to provide the further understanding to technical solution of the present invention, and forms the part of specification, with the application's embodiment mono-, is used from explanation technical scheme of the present invention, does not form the restriction to technical solution of the present invention.
Fig. 1 is existing wlan network configuration diagram;
The flow chart of the method that Fig. 2 is management ip address of the present invention;
The composition structural representation of the system that Fig. 3 is management ip address of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that do not conflict, the embodiment in the application and the feature in embodiment be combination in any mutually.
In the step shown in the flow chart of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out.And, although there is shown logical order in flow process, in some cases, can carry out step shown or that describe with the order be different from herein.
The flow chart of the method that Fig. 2 is management ip address of the present invention as shown in Figure 2, comprising:
Step 200: when access user quantity surpasses the IP number of addresses that BRAS sets in advance, BRAS adds the IP address to the Portal server request.
The public network IP address list is preserved in DHCP service on BRAS, so BRAS is whether the IP address of knowing self distributes.In this step, BRAS can pass through an IP address relocation request, to the Portal server request, adds the IP address.Carry ID, request transmission time Date, the request flag position IpRequest etc. of the BRAS equipment of request distributing IP address in an IP address relocation request.
Step 201:Portal server is to its lower other BARS inquiries IP address utilization of hanging, and other BARS return to Portal server by the vacant IP address situation of self.
In this step, Portal server is after receiving an IP address relocation request, to i.e. other BRAS except the BRAS of initiation IP address relocation request of its lower all BRAS(that hang) the inquiry request of broadcast polling IP address utilization.
Receive other BARS of inquiry IP address utilization broadcast, the number of users that may access future based on normal distribution 3 σ principles predictions self, and after deducting the number of users of this prediction, remaining vacant IP address returns to Portal server.Particularly,
In the BRAS course of work, can obtain the user and access quantity as the time interval of every 15 minutes according to the cycle, and take the current time and deposit in database as key assignments key, access user quantity as value value, the data reserve capacity is for being assumed to be 30 days.After BRAS receives the inquiry request of Portal server broadcast, the number of users that the corresponding data that BRAS read from database may access in following 15 minutes self is predicted, also can predict as required many class values in the specific implementation process, as 15 minutes one group, 30 minutes one group, 45 minutes one group etc., and choose the number of users that maximum number of user amount wherein may access as this BRAS future, wherein, Forecasting Methodology can adopt the Forecasting Methodology based on normal distribution 3 σ principles.After having predicted, BRAS compares current vacant IP quantity percentage and the vacant IP quantity percentage of prediction to choose low value and feed back to Portal server.Here, current vacant, refer to that unappropriated IP quantity of BRAS equipment current time accounts for the ratio of total IP quantity.And by the value with prediction relatively and get both low values, be in order to reduce the influence degree to BRAS.
Wherein, for the BRAS in wlan network, in the middle of one day, the distribution of the access user quantity of set time is a stable normal distribution.Access quantity owing to having recorded 30 days users on BRAS, therefore choose from the next record time of the last time current time and estimated as sample, such as the current time is 5:02(5: 20), be 5:15 writing time, 30 days users that can choose record access the data of 5:15 record every day in quantity and estimate as sample, and the quantity of this sample is 30.The purpose of sample size setting is in order to estimate average and the variance of normal distribution by sample.
According to normal distribution 3 σ principles, P (μ+3 σ<x≤μ+3 σ) 99.7%, wherein μ is that average and σ are standard deviation, i.e. normal distribution (μ-3 σ<x≤μ+3 σ] outside probability less than 0.3%, may occur hardly, be called small probability event.And only needing to guarantee in the present invention the upper limit, its probability of P (x≤μ+3 σ) is about 99.85%, therefore as long as guarantee that the IP number of addresses is greater than μ+3 σ and just can meets the following IP address need of this BRAS.Normal distribution 3 σ principles belong to those skilled in the art's known technology, repeat no more here.In the present invention, according to above-mentioned sample, average and the variance of calculating normal distribution according to normal distribution 3 σ principles complete prediction.
Therefore, BRAS after obtaining the sample value of historical record, computation of mean values μ and standard deviation sigma.By μ+3 σ computing that rounded up, be the maximum quantity of the following access user of prediction.In actual applications, also can choose one group of many groups as 15 minutes one group, 30 minutes one group, 45 minute, get maximum after being predicted respectively, to improve the precision of prediction.
Step 202:Portal server is selected a BRAS and is added the IP address to its request from the BRAS that returns to vacant IP address situation.
In this step, Portal server is chosen suitable vacant IP address list according to the principle of optimality.Such as, the vacant situation that each BRAS is returned is sorted, choose the part IP address ratio in the BRAS that wherein vacant IP address ratio is the highest, such as preset ratio value 50%, also can choose according to actual conditions, and send the 2nd IP address relocation request to this BRAS, carry the ID of the BRAS that Portal server selects, time, the request flag position that request sends in the 2nd IP address relocation request, and vacant IP reallocation ratio.
Step 203: requested BRAS returns to corresponding vacant IP address to Portal server from the vacant IP address of self.
After requested BRAS receives the 2nd IP address relocation request, ratio according to the Portal server indication, mark off respective numbers as 50% vacant IP address from vacant IP address, and this vacant address is freezed, such as being designated, it uses etc., to prevent that again being distributed to the user causes address conflict.Here, why directly not deleting this IP address is to operate unsuccessful and recover its previous status in order to prevent.
If process successfully, this requested BRAS can return to Portal the confirmation response of 200OK, and carries division IP address out in response message,
The IP address information of step 204:Portal server update self storage, and be handed down to the BRAS that the IP address is added in request, this BRAS upgrades the IP address information that self stores.
Portal server obtains 200OK confirm response and IP address after, upgrade the ID of BRAS and the list of corresponding IP address list, be about to IP address that requested BRAS marks off and transfer in the IP address list that the BRAS of IP address requesting reallocation is corresponding; After renewal completes, the BRAS of Portal server IP address requesting reallocation sends IP address list update request, and carries the IP address of new interpolation in this IP address list update request; After the BRAS of IP address requesting reallocation receives the IP address list update request from Portal server, upgrade the IP address list of self this locality, new IP address is added in the list of IP address.
Now, new IP address is equally in frozen state, and after having operated, the BRAS of this IP address requesting reallocation returns to the successful information of 200OK to Portal server; After Portal server is received successful information, send to delete to requested BRAS and freeze the IP Address requests; After requested BRAS receives this request, delete the IP address freeze, and upgrade the IP address list of self this locality; After having operated, requested BRAS sends ACK to Portal server and confirms that operation completes; After Portal server is received the ACK from requested BRAS, to the BRAS of IP address requesting reallocation, send the request freezed of removing, the BRAS of IP address requesting reallocation removes the IP address of freezing and upgrades the IP address list of self this locality.
Sending ACK to Portal server after the BRAS complete operation of IP address requesting reallocation confirms.The vacant IP address of part on requested like this BRAS just by this requested BRAS dynamic transfer to the BRAS of IP address requesting reallocation, and distribute to access wlan network user.
By the inventive method, the dynamic balanced IP address information of each BRAS in the wlan network, make the BRAS that access user quantity is many be assigned to more IP address, improved the access capability of network integral body.And, along with the constantly reallocation between BRAS of IP address information, the IP address of each BRAS will reach the stable state according to access user quantity, has also just realized the optimum distribution of IP address.
A kind of system of management ip address also is provided for the inventive method, as shown in Figure 3, at least comprises under Portal server, Portal server a plurality of BARS that hang, wherein,
BARS at least comprises control module, for when access user quantity surpasses the IP number of addresses self set in advance, to the Portal server request, adds the IP address; Receive the update notification from Portal server, upgrade the IP address information of self storing.
Portal server at least comprises administration module, for the request receiving from the BARS of IP address requesting reallocation, to its lower other BARS inquiries IP address utilization of hanging; Select a BRAS and add the IP address to its request from the BRAS that returns to vacant IP address situation; The idle IP address information of returning according to BARS, upgrade the IP address information of self storing, and notice request is added the BRAS of IP address;
Described BARS also comprises memory module, the prediction module that stores IP address list, wherein,
Control unit at BARS receives the inquiry request from Portal server, the notice prediction module;
Prediction module, for the number of users that may access future based on normal distribution 3 σ principles predictions self, and according to the IP address list of storing in described memory module, will deduct this number of users after remaining vacant IP address return to Portal server;
Control module in BARS is also returned to corresponding vacant IP address to Portal server for the vacant IP address from self.
Although the disclosed execution mode of the present invention as above, the execution mode that described content only adopts for ease of understanding the present invention, not in order to limit the present invention.Those of skill in the art under any the present invention; under the prerequisite that does not break away from the disclosed spirit and scope of the present invention; can on the form of implementing and details, carry out any modification and variation; but scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims was defined.
Claims (10)
1. the method for a management ip address, is characterized in that, comprising: when access user quantity surpasses the IP number of addresses that Broadband Remote Access Server BRAS sets in advance, BRAS adds the IP address to the Portal server request;
Portal server is to its lower other BARS inquiries IP address utilization of hanging, and other BARS return to Portal server by the vacant IP address situation of self;
Portal server is selected a BRAS and is added the IP address to its request from the BRAS that returns to vacant IP address situation, and requested BRAS returns to corresponding vacant IP address to Portal server from the vacant IP address of self;
Portal server upgrades the IP address information that self stores, and is handed down to the BRAS that the IP address is added in request, the IP address information of this BRAS renewal self storage.
2. method according to claim 1, is characterized in that, described BRAS adds the IP address to the Portal server request and comprises: described BRAS, by an IP address relocation request, adds the IP address to the Portal server request;
Carry identify label ID, request transmission time and the request flag position of described BRAS in an IP address relocation request.
3. method according to claim 2, is characterized in that, described Portal server comprises to its lower other BARS inquiries IP address utilization of hanging:
Described Portal server is after receiving an IP address relocation request, to the inquiry request of its lower other BRAS broadcast pollings IP address utilization except the described BRAS that initiates IP address relocation request of hanging.
4. according to the described method of claim 1～3 any one, it is characterized in that, described other BARS return to Portal server by the vacant IP address situation of self and comprise:
Described other BARS, the number of users that may access future based on normal distribution 3 σ principles predictions self, and after deduct the number of users of predicting, remaining vacant IP address returns to Portal server.
5. method according to claim 4, is characterized in that, the number of users that described prediction self may access future comprises two groups or more, takes the most following number of users that may access of the pre-quantitation of a group that amount is maximum.
6. method according to claim 1, is characterized in that, described Portal server is selected a BRAS and add the IP address to its request to comprise from the BRAS that returns to vacant IP address situation:
The vacant situation that described Portal server returns described other BRAS is sorted, and chooses the part IP address ratio in the BRAS that wherein vacant IP address ratio is the highest according to the preset ratio value, or chooses according to actual conditions;
Described Portal server sends the 2nd IP address relocation request to the requested BRAS selected, carry the ID of the described BRAS selected, time, the request flag position that request sends in the 2nd IP address relocation request, and vacant IP reallocation ratio.
7. method according to claim 6, is characterized in that, the method also comprises: the vacant address of IP of the respective numbers that described requested BARS freezes to select;
Until adding the BRAS of IP address, described request upgraded the IP address information of self storing, described Portal server sends to delete to requested BRAS and freezes the IP Address requests, the described IP address of freezing of described requested deletion, and upgrade the IP address list of self this locality.
8. a BARS, is characterized in that, at least comprises control module, stores memory module and the prediction module of IP address list; Wherein,
Control module, for when access user quantity surpasses the IP number of addresses self set in advance, add the IP address to the Portal server request; Receive from Portal server, update notification, upgrade the IP address information of self storage; Receive the inquiry request from Portal server, the notice prediction module; Return to corresponding vacant IP address to Portal server from the vacant IP address of self;
Prediction module, for the number of users that may access future based on normal distribution 3 σ principles predictions self, and according to the IP address list of storing in described memory module, will deduct this number of users after remaining vacant IP address return to Portal server.
9. a Portal server, is characterized in that, at least comprises administration module, for the request receiving from the BARS of IP address requesting reallocation, to its lower other BARS inquiries IP address utilization of hanging; Select a BRAS and add the IP address to its request from the BRAS that returns to vacant IP address situation; The idle IP address information of returning according to BARS, upgrade the IP address information of self storing, and notice request is added the BRAS of IP address.
10. the system of a management ip address, is characterized in that, at least comprises under Portal server, Portal server a plurality of BARS that hang;
When access user quantity surpasses the IP number of addresses self set in advance, described BARS is as request BARS, for to the Portal server request, adding the IP address; Receive the BRAS of inquiry request, for the vacant IP address situation by self, return to Portal server; Requested BRAS, return to corresponding vacant IP address to Portal server for the vacant IP address from self; Upgrade the IP address information of self storing;
Described Portal server, for receiving the price modification IP Address requests from request BRAS, to its lower other BARS inquiries IP address utilization except request BRAS of hanging; From the BRAS that returns to vacant IP address situation, select a BRAS to add the IP address as requested BRAS and to its request; Upgrade the IP address information of self storing, and be handed down to described request BRAS.
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| CN106060182A (en) * | 2016-05-03 | 2016-10-26 | 杭州华三通信技术有限公司 | Address allocation method and device |
| CN106130843A (en) * | 2016-08-01 | 2016-11-16 | 中国联合网络通信集团有限公司 | A kind of internet protocol address management system and method |
| CN107483298A (en) * | 2017-07-05 | 2017-12-15 | 北京华为数字技术有限公司 | The method and apparatus of radio communication |
| CN107786681A (en) * | 2016-08-31 | 2018-03-09 | 中国电信股份有限公司 | Methods, devices and systems for IP address scheduling of resource |
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| CN102387222A (en) * | 2011-10-19 | 2012-03-21 | 中国联合网络通信集团有限公司 | Address distribution method, apparatus and system thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106060182A (en) * | 2016-05-03 | 2016-10-26 | 杭州华三通信技术有限公司 | Address allocation method and device |
| CN106060182B (en) * | 2016-05-03 | 2019-09-17 | 新华三技术有限公司 | A kind of address distribution method and device |
| CN106130843A (en) * | 2016-08-01 | 2016-11-16 | 中国联合网络通信集团有限公司 | A kind of internet protocol address management system and method |
| CN107786681A (en) * | 2016-08-31 | 2018-03-09 | 中国电信股份有限公司 | Methods, devices and systems for IP address scheduling of resource |
| CN107786681B (en) * | 2016-08-31 | 2021-02-26 | 中国电信股份有限公司 | Method, device and system for scheduling IP address resources |
| CN107483298A (en) * | 2017-07-05 | 2017-12-15 | 北京华为数字技术有限公司 | The method and apparatus of radio communication |
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| CN103441865B (en) | 2017-08-11 |
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