CN110446242A - A kind of ePDG discovery and selection method and system - Google Patents
A kind of ePDG discovery and selection method and system Download PDFInfo
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- CN110446242A CN110446242A CN201910616115.6A CN201910616115A CN110446242A CN 110446242 A CN110446242 A CN 110446242A CN 201910616115 A CN201910616115 A CN 201910616115A CN 110446242 A CN110446242 A CN 110446242A
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- packet data
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- data gateway
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/16—Gateway arrangements
Abstract
A kind of ePDG discovery provided by the invention and selection method and system, wherein ePDG selects and find method to establish ePDG service ability scoring and realizing algorithm；The practical scoring situation of history access ePDG is established according to the scoring, and establishes history ePDG service ability grade form；The ePDG list T1 obtained in ePDG discovery procedure, according to the selection ePDG access of scoring terminal；The invention enables terminals according to scoring height, traffic load is rationally shared according to the service ability of practical ePDG, improve the probability of terminal access ePDG, reduce access delay, the rationally network load between processing ePDG, and the present invention program only needs terminal side to adjust, and the traffic load sharing of network side can be realized, it is convenient to provide for user, promotes user experience.
Description
Technical field
The invention belongs to communication field more particularly to a kind of ePDG discoveries and selection method and system.
Background technique
(VoWiFi is a kind of technology that IMS network is linked by WiFi to the existing VoWiFi with commercial potential quality, here
WiFi be exactly an access net, final provide business be IMS network with VoLTE is that comparison is similar, only VoLTE
Accessing net is LTE, and final is also to be linked into IMS network, and IMS network can provide short message, voice, the business such as video, IMS net
Network provides session control, it is ensured that service quality) scheme mainly has: the VoWiFi scheme based on trusted hot spot is based on
Untrusted appoints the VoWiFi scheme of hot spot, and more existing commercialization is the VoWiFi scheme for appointing hot spot based on untrusted；Mainly
Principle is that UE (user equipment) links any Wi-Fi hotspot acquisition networked capabilities, UE connection ePDG (Enhanced Packet
Data Gateway enhances packet data gateway, is access gateway when terminal accesses IMS network by WiFi network) network element,
Completion aaa server (Authentication, Authorization, Accounting are authorized, certification, the server of book keeping operation,
This server mainly completes the authentication of terminal user) certification, and establish ipsec tunnel (Internet with ePDG
Protocol Security is a protocol package, is encrypted and is authenticated by the grouping to IP agreement to protect IP agreement
Network transmission protocol race) guarantee the safety communicated, then ePDG is built from acquisition user APN and signing information to EPC network
Vertical PDP carrying, can carry out IMS business, such as register after completion, call etc..
There are two types of modes for the acquisition of the address ePDG in existing scheme: one is the address UE static configuration ePDG, such UE choosing
The ePDG selected is fixed；Another kind is UE according to vPLMN (Visited Public Land mobile network) information structuring ePDG address domain name,
And ePDG address list is obtained by DNS name resolution, the ePDG list that UE is returned according to DNS selects an available ePDG to connect
Enter, First ePDG can be selected to attempt in existing scheme, when unavailable, terminal can select second ePDG access, with such
It pushes away.
The address UE static configuration ePDG, the ePDG of selection be it is fixed, can not accomplish the load sharing between ePDG；And terminal
It can accomplish sub-load point according to vPLMN information structuring ePDG address domain name, and in such a way that DNS obtains ePDG list
Load, but UE always selects the ePDG of home network to access in existing scheme, without the case where there are international roamings, that is,
Say no matter user is in that countries and regions, can all access the ePDG server of ownership place, and the ePDG domain name of UE construction is
Fixed, the ePDG address list that DNS is returned is also fixation, and UE is always accessed since first ePDG, this will lead to column
In table forward ePDG server always can greater probability the work of appearance high load capacity, and UE also always can forward clothes in lists
There is the access failure of maximum probability on business device, retrying on second, third server for UE maximum probability increases VoWiFi industry
Business access delay, can not do traffic load sharing according to the practical capacity of ePDG；Bad experience is brought to user, is also given
Network causes biggish burden.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of ePDG discovery and selection methods
And system, it is intended to solution increase VoWiFi service access time delay in the prior art, can not according to the practical capacity of ePDG come
The problem of doing traffic load sharing.
In order to achieve the above object, this invention takes following technical schemes:
A kind of ePDG discovery and selection method, comprising:
It establishes enhancing packet data gateway service ability scoring and realizes algorithm；
The practical scoring situation of history access enhancing packet data gateway is established according to the scoring, and establishes history
Enhance packet data gateway service ability grade form；
The enhancing packet data gateway list T1 obtained in enhancing packet data gateway discovery procedure, according to scoring end
Hold the access of selective enhancement packet data gateway.
For improvement of the invention, the list T1 include: be present in history enhancing packet data gateway list T2 and
It is not present in the enhancing packet data gateway list T3 of history.
For improvement of the invention, before the access according to scoring selective enhancement packet data gateway further include:
The threshold values of default enhancing packet data gateway access；If the enhancing packet data gateway service energy in the list T2
Power scoring is greater than the threshold values, then terminal is preferentially selected to access from the list T2 by scoring size；
If the enhancing packet data gateway service ability scoring in the list T2 is less than the threshold values, terminal is from described
Access is randomly choosed in list T3.
For improvement of the invention, enhancing packet data gateway in the list T2 according to scoring be divided into list Ta and
Enhancing packet data gateway in list Tb, the list Ta, which scores, is all larger than or is equal to the threshold values, in the list Tb
Enhance packet data gateway scoring and is respectively less than the threshold values；If the list Ta be not it is empty, terminal according to the threshold values height
The low selective enhancement packet data gateway address from the list Ta is accessed；If the list Ta is sky, terminal is in institute
It states and randomly chooses access in list T3 or list Tb.
For improvement of the invention, after the completion of enhancing packet data gateway access, all access procedures according to access at
Function or access failure, will be in the grade form of corresponding index storage to corresponding enhancing packet data gateway.
For improvement of the invention, the foundation enhancing packet data gateway service ability scoring includes: to obtain eventually
Historical success rates, response speed, access duration and the number of stoppages of end enhancing packet data gateway access.
For improvement of the invention, the realization algorithm is calculated using following formula:
P=K1*P1+K2*P2+K3*P3+K4*P4
The P represents TOP SCORES, value range 0-5, and 5 points of highests are successively successively decreased, and the TOP SCORES embodies respectively
Enhance the service ability of packet data gateway；
The Ki represents weighting coefficient, the specific gravity that i indexs account in integrally scoring, value range 0-1, the tool of each
Body value can be according to actual measurement and experience value, K1+K2+K3+K4=1；
Pi represents the scoring of specific operational indicator, P1Represent the scoring that history is successfully accessed rate；P2Represent average response speed
The scoring of degree；P3Represent the scoring for averagely accessing duration；P4The scoring of representing fault number；Pi value range be 0-5,5 points most
Height successively successively decreases；Value determines the influence of specific operational indicator according to enhancing packet data gateway service ability.
The present invention also provides a kind of ePDG discovery and system is selected, the system comprises:
Module is obtained, for obtaining historical success rates, response speed, access duration and the number of stoppages of terminal；
Algoritic module, for calculating according to historical success rates, response speed, access duration and the number of stoppages got
TOP SCORES out；
AM access module, for being accessed according to the high enhancing packet data gateway of TOP SCORES selection scoring.
For improvement of the invention, the system also includes:
Memory module, for corresponding index according to being successfully accessed or access failure, to be stored to all access procedures
Into the grade form of corresponding enhancing packet data gateway.
Compared with prior art, beneficial effects of the present invention:
A kind of ePDG discovery provided by the invention and selection method and system, wherein ePDG selection and discovery method are as follows:
EPDG selects and finds method to establish enhancing packet data gateway service ability scoring and realizing algorithm；According to institute
It states scoring and establishes the practical scoring situation of history access enhancing packet data gateway, and establish history enhancing Packet Data Network
Close service ability grade form；The enhancing packet data gateway list T1 obtained in enhancing packet data gateway discovery procedure, according to
The access of scoring terminal selective enhancement packet data gateway；The invention enables terminal according to scoring height, according to reality
The service ability of ePDG rationally shares traffic load, improves the probability of terminal access ePDG, reduces access delay, rationally handles
Network load between ePDG, and the present invention program only needs terminal side to adjust, and the traffic load sharing of network side can be realized,
It is convenient to provide for user, promotes user experience.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of ePDG discovery and selection method in the present invention；
Fig. 2 is a kind of idiographic flow block diagram of ePDG discovery and the selection access of selection method in the present invention；
Fig. 3 is a kind of structural schematic block diagram of ePDG discovery and selection system in the present invention.
Specific embodiment
To make the purpose of the present invention, technical solution and effect clearer, clear and definite, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to
Limit the present invention.
As shown in Figure 1, a kind of ePDG discovery and selection method, the steps include:
S10, it establishes enhancing packet data gateway service ability scoring and realizes algorithm；
S11, the practical scoring situation that history access enhancing packet data gateway is established according to the scoring, and establish
History enhances packet data gateway service ability grade form；
The enhancing packet data gateway list T1 obtained in S12, enhancing packet data gateway discovery procedure, according to scoring machine
Terminal selective enhancement packet data gateway access processed.
Preferably, the list T1 includes: to be present in the enhancing packet data gateway list T2 of history and be not present in going through
The enhancing packet data gateway list T3 of history.
Preferably, before the access according to scoring selective enhancement packet data gateway further include:
The threshold values of default enhancing packet data gateway access；If the enhancing packet data gateway service energy in the list T2
Power scoring is greater than the threshold values, then terminal is preferentially selected to access from the list T2 by scoring size；
If the enhancing packet data gateway service ability scoring in the list T2 is less than the threshold values, terminal is from described
Access is randomly choosed in list T3.
Referring to fig. 2, enhancing packet data gateway accesses step are as follows:
S20, terminal carry out the discovery and selection of enhancing packet data gateway address；
S21, terminal enhance packet data gateway by Visited Public Land mobile network information structuring, and obtain to domain name system
The enhancing packet data gateway list T1 of the domain name is taken, and checks the enhancing packet data gateway for being present in history in list T1
It is divided into list T2；Be not present in the enhancing packet data gateway of history is divided into list T3；
Step S211 is used if list T2 is sky, if list T2 is not empty using step S22；
Enhancing packet data gateway in S211, random selection list T3 is accessed, until being successfully accessed；
S22, from history enhancing packet data gateway scoring in obtain list T2 in respectively enhance packet data gateway address
Scoring, and each enhancing packet data gateway is ranked up according to scoring height, trial access is carried out with sequence from high to low,
Until being successfully accessed.
Preferably, the enhancing packet data gateway in the list T2 is divided into list Ta and list Tb, institute according to scoring
It states the enhancing packet data gateway scoring in list Ta and is all larger than or is equal to the threshold values, the enhancing packet count in the list Tb
The threshold values is respectively less than according to gateway scoring；If the list Ta be not it is empty, terminal is according to the height of the threshold values from the column
Selective enhancement packet data gateway address is accessed in table Ta；If the list Ta is sky, terminal in the list T3 or
Access is randomly choosed in list Tb.
Specifically, enhancing packet data gateway accesses step further include:
Enhancing packet data gateway in S23, the list T2 is divided into list Ta and list Tb, the column according to scoring
Enhancing packet data gateway scoring in table Ta is all larger than or is equal to the threshold values, the enhancing Packet Data Network in the list Tb
It closes scoring and is respectively less than the threshold values；
Step S231 is used if list Ta is sky, if list Ta is not empty using step S24；
S231, then random selection enhancing packet data gateway is accessed in the list T3 or list Tb, until connecing
Enter success；
Respectively enhance the scoring of packet data gateway address in S24, acquisition list Ta, and each enhancing packet data gateway is pressed
It is ranked up according to scoring height, trial access is carried out with sequence from high to low, until being successfully accessed.
Specifically, terminal according to the priority accessed from Ta table by selective enhancement packet data gateway address, such as
Perhaps Ta table is that perhaps T2 table is empty again or in the presence of the enhancing packet data gateway as scoring to sky again to the equal access failure of fruit
Address then all carries out the selection of enhancing packet data gateway using randomly selected mechanism.
Preferably, after the completion of the access of enhancing packet data gateway, all access procedures are according to being successfully accessed or access mistake
It loses, it will be in the grade form of corresponding index storage to corresponding enhancing packet data gateway.
Specifically, enhancing packet data gateway accesses step further include:
S25, after the completion of enhancing packet data gateway access, no matter successful all access procedures are or failure, all by
Specific targets are counted to update into the grade form of corresponding enhancing packet data gateway.
Preferably, the foundation enhancing packet data gateway service ability scoring includes: to obtain terminal enhancing grouping
Historical success rates, response speed, access duration and the number of stoppages of data gateway access.
Specifically, the historical success rates: terminal counts the access for the enhancing packet data gateway that all history accessed
Success rate has objectively reacted history service condition, processing load-bearing capacity situation of each enhancing packet data gateway etc.；
Response speed: in statistics terminal and enhancing packet data gateway regular traffic use process, enhance Packet Data Network
The average value to the processing speed of terminal request data is closed, this refers to that statistics is needed when guaranteeing that WiFi mass is higher than the threshold values
Significant, enhancing packet data gateway response speed when lower than the threshold values is not used as statistical data；The index can react
Enhance the ability of the response data of packet data gateway service, because respectively the server configuration of enhancing packet data gateway may
It is variant, such as computing capability, network throughput etc..
Access duration: refer to terminal request access enhancing packet data gateway, successfully connect to enhanced packet data gateway
The average value of the duration entered.The value can embody the speed of terminal access enhancing packet data gateway, to reduce terminal access enhancing
Packet data gateway time delay provides reference index；
The number of stoppages: referring in normal VoWiFi business procedure, since enhancing packet data gateway failure causes in business
The average time that situations such as breaking, switching, rebuild link occurs.In view of enhancing individually, packet data gateway is unstable to lead the index
The business experience difference problem of cause.
In conclusion being difficult to measure the service ability of enhancing packet data gateway with an operational indicator.Therefore this hair
A kind of scoring is proposed based on above-mentioned operational indicator in bright scheme, the service of enhancing packet data gateway is determined jointly by it
Ability, specific algorithmic formula are as follows:
P=K1*P1+K2*P2+K3*P3+K4*P4
The P represents TOP SCORES, value range 0-5, and 5 points of highests are successively successively decreased, and the TOP SCORES embodies respectively
Enhance the service ability of packet data gateway；
The Ki represents weighting coefficient, the specific gravity that i indexs account in integrally scoring, value range 0-1, the tool of each
Body value can be according to actual measurement and experience value, K1+K2+K3+K4=1；
Specifically, K is weighting coefficient, need to be obtained according to actual measurement and experience, main foundation is these operational indicators
Shared specific gravity, if these specific gravity are the same, each value is 0.25, the K if only considering response speed1=1, then
Other are all 0, etc.；
PiRepresent the scoring of specific operational indicator, P1Represent the scoring that history is successfully accessed rate；P2Represent average response speed
The scoring of degree；P3Represent the scoring for averagely accessing duration；P4The scoring of representing fault number；Pi value range be 0-5,5 points most
Height successively successively decreases；Value determines the influence of specific operational indicator according to enhancing packet data gateway service ability.
For example, specific operational indicator table is as follows:
For example, showing that scoring table is as follows according to specific operational indicator:
The scoring that ePDG1 (enhancing packet data gateway 1) is learnt according to above table is 5, attempts selection access to be preferential
EPDG, certainly, in specific access procedure, the terminal selective enhancement packet data gateway from Ta table according to the priority
Address is accessed；
If perhaps Ta table is that perhaps T2 table is that sky divides again or in the presence of the same enhancing of scoring to sky again to equal access failure
Group data gateway address, then all carry out the selection of enhancing packet data gateway using randomly selected mechanism.
The present invention also provides a kind of ePDG discovery and system is selected, the system comprises:
Module 1 is obtained, for obtaining historical success rates, response speed, access duration and the number of stoppages of terminal；
Algoritic module 2, for calculating according to historical success rates, response speed, access duration and the number of stoppages got
TOP SCORES out；
AM access module 3, for according to TOP SCORES, the high enhancing packet data gateway of preferential selection scoring to be accessed.
Preferably, the system also includes:
Memory module 4, for corresponding index according to being successfully accessed or access failure, to be stored to all access procedures
Into the grade form of corresponding enhancing packet data gateway.
In conclusion the working principle of heretofore described system are as follows:
Obtain historical success rates, response speed, access duration and the number of stoppages of terminal, the comprehensive history success got
Rate, response speed, access duration and the number of stoppages, calculate TOP SCORES；According to TOP SCORES, from scoring from high to low suitable
Sequence selection ePDG carries out trial access, until success；The invention enables terminal according to scoring height, according to the clothes of practical ePDG
Business ability rationally shares traffic load, improves the probability of terminal access ePDG, reduces access delay, rationally handles the net between ePDG
Network load, and the present invention program only needs terminal side to adjust, and the traffic load sharing of network side can be realized, provide for user
It is convenient, promote user experience.
It, can according to the technique and scheme of the present invention and its hair it is understood that for those of ordinary skills
Bright design is subject to equivalent substitution or change, and all these changes or replacement all should belong to the guarantor of appended claims of the invention
Protect range.
Claims (9)
1. a kind of ePDG discovery and selection method, which is characterized in that the described method includes:
S10, it establishes enhancing packet data gateway service ability scoring and realizes algorithm；
S11, the practical scoring situation that history access enhancing packet data gateway is established according to the scoring, and establish history
Enhance packet data gateway service ability grade form；
The enhancing packet data gateway list T1 obtained in S12, enhancing packet data gateway discovery procedure, according to scoring end
Hold the access of selective enhancement packet data gateway.
2. ePDG discovery according to claim 1 and selection method, which is characterized in that the list T1 includes: to be present in
The enhancing packet data gateway list T2 of the history and enhancing packet data gateway list T3 for being not present in history.
3. ePDG discovery according to claim 1 or 2 and selection method, which is characterized in that described to be selected according to scoring
It selects before enhancing packet data gateway access further include:
The threshold values of default enhancing packet data gateway access；If the enhancing packet data gateway service ability in the list T2 is commented
Divide and be greater than the threshold values, then terminal is preferentially selected to access from the list T2 by scoring size；
If the enhancing packet data gateway service ability scoring in the list T2 is less than the threshold values, terminal is from the list
Access is randomly choosed in T3.
4. ePDG discovery according to claim 3 and selection method, which is characterized in that the enhancing grouping in the list T2
The enhancing packet data gateway scoring that data gateway is divided into list Ta and list Tb, the list Ta according to scoring is all larger than
Or it is equal to the threshold values, the enhancing packet data gateway scoring in the list Tb is respectively less than the threshold values；If the list Ta
It is not sky, then according to the height of the threshold values, the selective enhancement packet data gateway address from the list Ta is connect terminal
Enter；If the list Ta is sky, terminal randomly chooses access in the list T3 or list Tb.
5. ePDG discovery according to claim 1 and selection method, which is characterized in that enhancing packet data gateway has accessed
Cheng Hou, all access procedures are according to being successfully accessed or access failure, by corresponding index storage to corresponding enhancing packet count
According in the grade form of gateway.
6. ePDG discovery according to claim 1 or 2 and selection method, which is characterized in that the foundation enhances packet count
According to gateway service ability scoring include: obtain terminal enhancing packet data gateway access historical success rates, response speed,
Access duration and the number of stoppages.
7. ePDG discovery according to claim 6 and selection method, which is characterized in that the realization algorithm uses following public affairs
Formula is calculated:
P=K1*P1+K2*P2+K3*P3+K4*P4
The P represents TOP SCORES, value range 0-5, and 5 points of highests are successively successively decreased, and the TOP SCORES embodies each enhancing
The service ability of packet data gateway；
The KiWeighting coefficient is represented, the specific gravity that i indexs account in integrally scoring, value range 0-1, each specifically takes
Value can be according to actual measurement and experience value, K1+K2+K3+K4=1；
PiRepresent the scoring of specific operational indicator, P1Represent the scoring that history is successfully accessed rate；P2Represent average response speed
Scoring；P3Represent the scoring for averagely accessing duration；P4The scoring of representing fault number；Pi value range is 0-5,5 points of highests, according to
It is secondary to successively decrease；Value determines the influence of specific operational indicator according to enhancing packet data gateway service ability.
8. a kind of ePDG discovery and selection system, which is characterized in that the system comprises:
Module is obtained, for obtaining historical success rates, response speed, access duration and the number of stoppages of terminal；
Algoritic module, for calculating total according to historical success rates, response speed, access duration and the number of stoppages got
Body scoring；
AM access module, for being accessed according to the high enhancing packet data gateway of TOP SCORES selection scoring.
9. ePDG discovery according to claim 8 and selection system, which is characterized in that the system also includes:
Memory module, for by all access procedures according to being successfully accessed or access failure, by the storage of corresponding index to right
In the grade form for the enhancing packet data gateway answered.
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