CN101026548A - Data business routing method - Google Patents
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- CN101026548A CN101026548A CNA2006100113594A CN200610011359A CN101026548A CN 101026548 A CN101026548 A CN 101026548A CN A2006100113594 A CNA2006100113594 A CN A2006100113594A CN 200610011359 A CN200610011359 A CN 200610011359A CN 101026548 A CN101026548 A CN 101026548A
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Abstract
In packet switching system PDSN, the method for routing data traffic allocates IP addresses for users according to user rank. Distinguishing ranks of data users makes users in different ranks possess different attributes. User in high rank uses pointed address segment of public network (more resources in public network allocated), or is allocated specific address segment of private network, but uses NAT (network address transform), not PAT (port address transform). Users in low rank are lot allowed using resources for users in high rank. When using address segment of public network or after one to one address mapping, user in high rank can access network resources restricting some source ports. Through PAT, user in low rank is unable to access such resources. The invention raises efficiency for accessing system.
Description
Technical field
The present invention relates to a kind of method for routing, particularly relate to and a kind ofly finish the method for carrying out the data service route according to user gradation jointly by PDSN and router according to user gradation assigns the Internet protocol (IP) address and according to IP address allocated.
Background technology
At present, commercial on a large scale based on CDMA2000 1X packet switching system PDSN (Packet Data Service Node packet data serving node), each big telecom equipment provider of the whole world has all been released the packet switching system PDSN of oneself, the release of these systems is that the standard of formulating with 3GPP2 (3rd GenerationPartnership Project 2:3G cooperative groups 2) is a framework substantially, on this basis for satisfying requirements of different users, released PDSN system respectively then with own service characteristic.
The basic function target of PDSN system is: the PDSN system is connected with internet/intranet with cdma base station system, as IAD, provides Simple IP and Mobile IP to insert, and the packet data service of CDMA2000 system is provided.
The main technology of using has the expressway by retransmission technique, high-speed asynchronous PPP treatment technology, IP switching technology, Simple IP/Mobile IP technology etc. in the PDSN system.
PDSN is used to portable terminal that Packet Data Network's access point is provided, for providing a cover complete grouping system solution, simultaneously also introduced the AAA (Authentication of authentication, mandate, charging, Authorization, Accounting: authentication, mandate, charging) server, it is worked in coordination with PDSN and finishes user's basic authentication, mandate, accounting management function together.PDSN also cooperates and finishes functions such as user's authentication and chargings.
CDMA2000 1X packet switching system as shown in Figure 1, comprise cover wireless side BS (BaseStation) base station system and a PCF (Packet Control Function: Packet Control Function), BS is mainly the user and distributes air resource, and PCF, PDSN, AAA finish data service together jointly and insert.PDSN and PCF carry out function as follows.The first, they are called out for packet dedicated and carry out packet call control and state exchange function; The second, they are the professional ppp feature of carrying out of packet radio Internet based on dedicated network; The 3rd, they carry out the traffic signaling function for Packet data service, and carry out the packet network architecture function; The 4th, they also support OAM (operation management maintain) function.Router is finished the visit of heterogeneous networks resource.And fire compartment wall is finished network security and routing function.
User's normal access process roughly is described below as shown in Figure 2:
(Mobile Station: travelling carriage) request inserts the application of air resource and distribution for step 201, MS;
After step 206, aaa server are received the authentication request bag, user's identity is carried out authentication and authorization, return the authentication responses message;
As can be seen, user's normal access mainly comprises three reciprocal processes in the above-mentioned flow process: the first, and the signalling interactive process of A11, it mainly act as the user and sets up A10 data channel between PCF and the PDSN; The second, user's PPP reciprocal process, it mainly act as end-to-end connection of setting up between MS and the PDSN; The 3rd, the reciprocal process of PDSN and AAA adopts the radius protocol of standard mutual.
Wherein, the IP address assignment of MS generally has three kinds of methods.The first, MS can carry the IP address in the ppp negotiation stage and give PDSN, verified by PDSN and AAA, but PDSN can refuse the IP application IP addresses that MS carries; The second, distribute by PDSN, be IP address of MS application normally in IPCP (IP control protocol) stage of PPP, this address can obtain from the temporary IP address pool of PDSN; The 3rd, distributed by AAA, normally in the reciprocal process of PDSN and AAA, AAA selects a valid ip address to distribute to MS from the address pool of oneself preserving, utilize the RADIUS message of standard that the IP address of distributing is sent to PDSN then, by PDSN this address is sent to MS more at last.
Any address distribution method no matter, a kind of like this user's request is all arranged usually: need to distinguish user gradation sometimes, distribute different IP addresses according to user gradation, distributing IP address user is adopted different routing modes, the user just can visit different Internet resources.So,, correspondingly also need to make a kind of effective address allocation policy to satisfy the authority of different brackets user capture heterogeneous networks resource according to this user's request.
Therefore, there are following two problems at the distribution of MS address: the first, PDSN often can not come to distribute different IP addresses for the user according to user gradation; The second, how PDSN is for the different brackets user provides different routes, thereby makes the user go to enjoy the more packet data functionality of high quality-of-service.Carry out different routes according to different user grade PDSN like this and just become extremely important.
All have at above problem different manufacturers and to have proposed own different IP address assignment strategy.For example, some producer proposes such address distribution: if will be for a MS user distributes an IP address, at first, system comprises the database of a store M S class information, after receiving the IP address assignment request relevant with any MS, the MS grade identifies from database.Then, select an IP address pool according to the MS grade from the IP address pool of various different brackets, the IP address pool has comprised assignable IP address.Then, select an IP address in the secondary IP address pond, and give MS selected IP address assignment.
The defective of this address distribution method mainly contains 2 points.The first, the class information of MS need be stored by a special database, must increase the mutual time with database network elements like this when address assignment, thereby increase the complexity of access process and the efficient of address assignment; The second, owing to the interface that has increased between PDSN and the database, thereby make the interconnection and interflow of system poorer, the compatibility of system is also relatively poor.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of data business routing method, improves access efficiency, the interconnection and interflow of enhanced system and the compatibility of system of system.
To achieve these goals, the invention provides a kind of data business routing method, its characteristics are, this method is in packet switching system PDSN, distribute the respective level user's IP address according to user gradation, carry out different routes according to IP address allocated then, realize the different Internet resources of different brackets user capture.
Above-mentioned data business routing method, its characteristics are, distributing in the process of respective level user's IP address according to user gradation, is to transmit user gradation information at the standard RADIUS message that user's authorization phase utilizes packet switching system PDSN and aaa server to reserve.
Above-mentioned data business routing method, its characteristics are that this method comprises the steps:
Above-mentioned data business routing method, its characteristics are, in step 1, comprise following steps:
Newly-built a certain class user property file in aaa server;
In newly-built property file, add the address pool attribute;
IP address pool of this address pool attribute binding, wherein the title of IP address pool is consistent with the IP address pool title of indication in the step 2.
Above-mentioned data business routing method, its characteristics are that in step 1, this IP address pool is stored among aaa server or the packet switching system PDSN; And, corresponding, in step 2, this grade user's IP address pond of graduation configuration in aaa server or packet switching system PDSN.
Above-mentioned data business routing method, its characteristics are that in step 5, the normal the Internet that inserts of subscriber dialing online comprises following steps:
The travelling carriage request inserts, the application of air resource and distribution;
Packet Control Function request and packet switching system are set up passage, send register requirement;
Packet switching system PDSN accepts passage and sets up request, responds registration reply, sets up passage;
Travelling carriage and packet switching system PDSN enter the LCP stage of PPP, consult the attribute of link layer;
Travelling carriage and packet switching system enter the authentication negotiation phase, the authentication message that packet switching system PDSN sends according to travelling carriage, and structure mails to the authentication request bag that includes user gradation information of aaa server, carries out the authentication of user identity to aaa server;
After aaa server is received the authentication request bag, user's identity is carried out authentication and authorization return the authentication responses message that contains user gradation information, the IP address of user gradation information mapping to corresponding grade;
Travelling carriage and packet switching system PDSN enter the IP control protocol stage of PPP, consult the attribute of IP layer, comprise the IP address of distributing to travelling carriage.
Above-mentioned data business routing method, its characteristics are that in the process of the 1P address of distributing to travelling carriage, it comprises following steps:
If adopt aaa server distributing user IP address, then the attribute information of self being preserved according to it by aaa server obtains IP address pool title, in the IP address pool of aaa server, select a valid ip address to distribute to the user according to this IP address pool title then, and, this IP address is transmitted to travelling carriage by packet switching system PDSN in aaa server carries the corresponding class user that is distributed in the RADIUS of packet switching system PDSN echo reply message IP address;
If adopt packet switching system PDSN distributing user IP address, after then packet switching system PDSN obtains the customer attribute information that contains user gradation information from aaa server, after user gradation information noted, give travelling carriage according to this user gradation to obtaining the IP available address assignment with the corresponding IP address pool of its grade by packet switching system PDSN.
Above-mentioned data business routing method, its characteristics are, also comprise step after step 2:
A newly-built customer group in aaa server, and with newly-built property file join in this group;
In aaa server, add a network address translation user, and with newly-built customer group be associated with this network address translation user.
Above-mentioned data business routing method, its characteristics are, after step 6, also comprise step:
Whether packet switching system PDSN makes network address translation according to the decision of the IP address that obtains, if network address translation is made in decision, does the IP conversion or IP adds port translation.
Above-mentioned data business routing method, its characteristics are, before the normal data service of carrying out the user, also comprise step:
The user is normal insert after, packet switching system PDSN sends the beginning message notifying aaa server that charges to aaa server and begins charging to the user.
The present invention is by distinguishing data user's grade, the user of different brackets can have different attributes, high-grade user uses the public network address section (distributing more public network resource) of appointment, perhaps distribute specific private net address section still to adopt NAT (network address translation) rather than PAT (port address conversion), inferior grade user can not use high-grade user's resource.For high-grade user after using public network address section or man-to-man map addresses, just can visit those to the conditional Internet resources of source port, and the inferior grade user just can't visit such resource when using PAT, has improved the access efficiency of system.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is that CDMA2000 1X packet data user inserts schematic diagram;
Fig. 2 does not distinguish the packet data user access process figure of user gradation for PDSN;
Fig. 3 is the form schematic diagram of the RADIUS message of standard of the present invention;
Fig. 4 is the concrete form schematic diagram of the attribute field of a RADIUS of the present invention;
Fig. 5 carries out the packet data user access process figure of different routes according to user gradation for PDSN of the present invention.
Embodiment
The present invention relates to a kind of CDMA2000 1X (code division multiple access system) packet switching system PDSN (Packet Data Service Node packet data serving node) carries out different routes according to user gradation implementation method.Method of the present invention is to distribute the respective level user's IP address according to user gradation, carries out different routes according to IP address allocated then, thereby realizes the different Internet resources of different brackets user capture.
In the present invention, for realizing more efficiently at different brackets user's IP address allocation strategy, can utilize the standard RADIUS message of PDSN and AAA to transmit user gradation information in user's authorization phase, omit this unnecessary link of exclusive access database, user's class information is all safeguarded by AAA, even the user's IP address distribution also can be distributed by AAA, also adopt the radius protocol message of standard to pass to PDSN to the AAA IP address allocated simultaneously, be transmitted to MS by PDSN then.Certainly the IP address assignment of MS also can adopt method 2 to be finished by PDSN, and PDSN only is required to be the different user grade and preserves different IP address pool and get final product.
In user's normal access process, do following 2 changes in user's AAA authorization phase: the first, when PDSN sent authentication request to AAA, PDSN carried the user gradation solicited message to the RADIUS message that AAA sends standard in this message request; After AAA receives this request message, send the response message of authentication request, adopt the radius protocol message of standard equally, and in the RADIUS response message, carry the user gradation response message.The user gradation message of carrying in the RADIUS response message that AAA returns refers to the profile that this class user is stored in fact in AAA, and this user's profile has bound the IP address pool of corresponding class user.User's class information can reflect by the IP address of its corresponding grade like this, because the user is after the IP address that obtains corresponding grade, can be this grade user the different IP route is set in router, thereby make the different brackets user have the authority of visit heterogeneous networks resource.
The second, PDSN obtains customer attribute information (comprising user gradation information) from AAA, after user gradation information is noted, if the IP address of MS is distributed by PDSN, then selects a respective level user's IP address to distribute to MS from the IP address pool of PDSN; If the IP address of MS is distributed by AAA, AAA also should store an IP address pool same with PDSN, AAA is when the request of receiving PDSN, from this IP address pool, select the IP address of a respective user grade, RADIUS message (comprising user gradation request-reply information) by standard sends to PDSN simultaneously, and PDSN is transmitted to MS to this IP address again.
As from the foregoing, the present invention utilizes standard RADIUS message mutual between PDSN and the AAA to transmit user gradation information, we carry out respective settings to its attribute in the RADIUS of standard message, and an attribute field Attributes is arranged in the RADIUS message, and form as shown in Figure 3.
In the RADIUS message of asking and replying, can carry concrete authentication, authorization message by this property value, simultaneously also can be by the class information of this attribute designated user.The concrete form of the attribute field of a RADIUS as shown in Figure 4.That wherein, the RADIUS type in the Attributes attribute field refers to is exactly Type.The present invention utilizes this field to specify the RADIUS type of RADIUS message to be Framed-Pool, then this attribute is added among user's the profile.
Therefore, for realizing the IP address of the corresponding grade of different brackets user applies, can specify the Type value of Attributes attribute to be Framed-Pool simultaneously in advance at the profile of the newly-built user gradation of AAA.The concrete IP address pool of Framed-Pool type binding, this IP address pool is stored in (AAA or PDSN have stored different IP address pool at different user gradations) among AAA or the PDSN.Like this, user's class information just can transmit by the RADIUS message of standard.
The specific implementation step that PDSN carries out different routes according to user's grade is as follows:
The purpose of above-mentioned steps 1 is for user's class information is mapped as the IP address pool, by division to the IP address field, the different user grade is used different IP address fields, when the user inserts internet and carries out data service, PDSN just can set different routes according to user's IP address with router, thereby realizes that user's (distinguishing user gradation by the IP address) of different IP addresses possesses the authority of visit heterogeneous networks resource.So PDSN and router must be known corresponding which user gradation of which IP address field in advance.
The purpose of step 3 and step 4 is in order to set up user MS with the passage between the internet, according to IP address differentiation different brackets user, thereby guarantees that the different brackets user has the authority of visit heterogeneous networks resource.
The key point that the present invention realizes is as follows: the first, in user's authorization phase attribute of user is passed to PDSN by AAA, and comprise user gradation information, all user profile are safeguarded by AAA; The second, the user gradation identifying information of AAA and PDSN can utilize the standard RADIUS message field (MFLD) of reservation to carry out alternately; The 3rd, PDSN or AAA still use assigned ip pond mode; The 4th, if want to set up a certain class user, the method only can be effective to the class user that is about to set up, and other class user is not affected.
When user's normal dialing is surfed the Net, for the identity of sign different user grade and the routing function of realizing the different brackets user, expand its function, the present invention proposes solution shown in Figure 5, and networking structure can be with reference to figure 1.As shown in Figure 5, user's access process comprises:
501, (Mobile Station: travelling carriage) request inserts the application of air resource and distribution to MS;
502, PCF request and PDSN set up the A10 passage, send the A11-RRQ register requirement;
503, PDSN accepts the A10 passage and sets up request, responds the A11-RRP registration reply, sets up the A10 passage;
504, MS and PDSN enter LCP (the Link Control Protocol: stage LCP), the attribute of negotiation link layer of PPP;
505, MS and PDSN enter the authentication negotiation phase, optionally authentication is PAP (password authentication protocol) and CHAP (inquiry shake hands authentication protocol), the authentication message that PDSN sends according to MS, structure mails to the authentication request bag (carrying corresponding user gradation information) of aaa server, carries out the authentication of user identity to aaa server;
506, after aaa server is received the authentication request bag, user's identity is carried out authentication and authorization, return authentication responses message (carrying corresponding user gradation information);
507, MS and PDSN enter IPCP (the IP Control Protocol:IP control protocol) stage of PPP, consult the attribute of IP layer, comprise IP address and VJ (a kind of IP/TCP compression protocol) compression options of distributing to MS;
508, the user is normal insert after, PDSN sends the beginning message notifying aaa server that charges to aaa server and begins charging to the user;
509, the simple IP user can pass through Access Network, finishes visit to IP network by PDSN, and, mutual in order to guarantee user's normal data, and different brackets user route is set, thus realize the authority of different brackets user capture heterogeneous networks resource.
Comparison diagram 2 and Fig. 5, the access process that can see the user is consistent substantially.Just, when PDSN sends the RADIUS message of standard, carry corresponding user gradation information and give AAA in the subscription authentication stage.
In conjunction with above-mentioned flow process, in actual applications, can implement as follows:
1) at first, newly-built a certain class user Profile file in AAA adds the Framed-Pool attribute in newly-built profile, then IP address pool IP-Pool of Framed-Pool binding;
2), then need to dispose this grade user's IP pond (graduation) at PDSN if the IP address pool is kept at PDSN; If the IP address pool is kept at AAA, then need to dispose this grade user's IP pond (graduation) at AAA;
3) a newly-built user Group in AAA joins profile newly-built in the step 1 in this group;
4) in AAA, add a NAI user, then Group newly-built in the step 3 is associated with this NAI user.
5) route between the router " MS and Internet " is set up in the setting of change router;
6) route between the fire compartment wall " MS and Internet " is set up in the setting of change fire compartment wall;
7) the MS request inserts the application of air resource and distribution;
8) PCF request and PDSN set up the A10 passage, send the A11-RRQ register requirement;
9) PDSN accepts the A10 passage and sets up request, responds the A11-RRP registration reply, sets up the A10 passage;
10) MS and PDSN enter LCP (the Link Control Protocol: stage LCP), the attribute of negotiation link layer of PPP;
11) MS and PDSN enter the authentication negotiation phase, optionally authentication is PAP (password authentication protocol) and CHAP (inquiry shake hands authentication protocol), the authentication message that PDSN sends according to MS, structure mails to the authentication request bag (containing user gradation information) of aaa server, carries out the authentication of user identity to aaa server;
12) after aaa server is received the authentication request bag, user's identity is carried out authentication and authorization, return authentication responses message (containing user gradation information) the IP address of user gradation information mapping to corresponding grade;
13) MS and PDSN enter IPCP (the IP Control Protocol:IP control protocol) stage of PPP, consult the attribute of IP layer, comprise IP address and VJ (a kind of IP/TCP compression protocol) compression options of distributing to MS.If adopt PDSN distributing user IP address, PDSN according to this user gradation to obtaining the IP available address with the corresponding IP address pool of its grade; If adopt AAA distributing user IP address, the echo reply message of AAA should comprise the IP address of the corresponding class user of distribution;
14) user is normal insert after, PDSN sends the beginning message notifying aaa server that charges to aaa server and begins charging to the user;
15) the simple IP user can pass through Access Network, finishes visit to IP network by PDSN;
16) when user's normal data service, router carries out different routes with fire compartment wall according to the IP address of different user grade, thereby realizes the authority of different brackets user capture heterogeneous networks resource.
The present invention is by distinguishing data user's grade, the user of different brackets can have different attributes, concrete function is embodied in the public network address section (distributing more public network resource) that high-grade user uses appointment, perhaps distribute specific private net address section still to adopt NAT (network address translation) rather than PAT (port address conversion), inferior grade user can not use high-grade user's resource.After using public network address section or man-to-man map addresses, just can visit those for high-grade user, and the inferior grade user just can't visit such resource when using PAT to the conditional Internet resources of source port.
In sum, the beneficial effect that method of the present invention is brought, can reduce following some:
(1) this invention, the AAA authorization phase that the user inserts is utilized the RADIUS message transmission user's of standard class information, change few, system compatible good.
(2) by setting, can provide different routes for the different brackets user, and be convenient to different brackets user's management router and fire compartment wall.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1, a kind of data business routing method, it is characterized in that this method is in packet switching system PDSN, distribute the respective level user's IP address according to user gradation, carry out different routes according to IP address allocated then, realize the different Internet resources of different brackets user capture.
2, data business routing method according to claim 1, it is characterized in that, distributing in the process of respective level user's IP address according to user gradation, is to transmit user gradation information at the standard RADIUS message that user's authorization phase utilizes packet switching system PDSN and aaa server to reserve.
3, data business routing method according to claim 2 is characterized in that, this method comprises the steps:
Step 1 is set up related between user and the user gradation;
Step 2, this grade user's IP address pond of graduation configuration;
Step 3, the route between the travelling carriage and the Internet on the router is set up in change router setting;
Step 4, the route between the travelling carriage and the Internet on the fire compartment wall is set up in change fire compartment wall setting;
Step 5, the normal the Internet that inserts of subscriber dialing online, wherein in the subscription authentication stage, the RADIUS message interaction of packet switching system PDSN and aaa server has carried user's rank request and response message;
Step 6, the IP address that obtains corresponding class user;
Step 7, when user's normal data service, router carries out different routes with fire compartment wall according to the IP address of different user grade, thereby realizes the authority of different brackets user capture heterogeneous networks resource.
4, data business routing method according to claim 3 is characterized in that, in step 1, comprises following steps:
Newly-built a certain class user property file in aaa server;
In newly-built property file, add the address pool attribute;
IP address pool of this address pool attribute binding, wherein the title of IP address pool is consistent with the IP address pool title of indication in the step 2.
5, data business routing method according to claim 4 is characterized in that, in step 1, this IP address pool is stored among aaa server or the packet switching system PDSN; And, corresponding, in step 2, this grade user's IP address pond of graduation configuration in aaa server or packet switching system PDSN.
6, data business routing method according to claim 5 is characterized in that, in step 5, the normal the Internet that inserts of subscriber dialing online comprises following steps:
The travelling carriage request inserts, and please and distribute in the air resource;
Packet Control Function request and packet switching system are set up passage, send register requirement;
Packet switching system PDSN accepts passage and sets up request, responds registration reply, sets up passage;
Travelling carriage and packet switching system PDSN enter the LCP stage of PPP, consult the attribute of link layer;
Travelling carriage and packet switching system enter the authentication negotiation phase, the authentication message that packet switching system PDSN sends according to travelling carriage, and structure mails to the authentication request bag that includes user gradation information of aaa server, carries out the authentication of user identity to aaa server;
After aaa server is received the authentication request bag, user's identity is carried out authentication and authorization return the authentication responses message that contains user gradation information, the IP address of user gradation information mapping to corresponding grade;
Travelling carriage and packet switching system PDSN enter the IP control protocol stage of PPP, consult the attribute of IP layer, comprise the IP address of distributing to travelling carriage.
7, data business routing method according to claim 6 is characterized in that, in the process of the IP address of distributing to travelling carriage, it comprises following steps:
If adopt aaa server distributing user IP address, then the attribute information of self being preserved according to it by aaa server obtains IP address pool title, in the IP address pool of aaa server, select a valid ip address to distribute to the user according to this IP address pool title then, and, this IP address is transmitted to travelling carriage by packet switching system PDSN in aaa server carries the corresponding class user that is distributed in the RADIUS of packet switching system PDSN echo reply message IP address;
If adopt packet switching system PDSN distributing user IP address, after then packet switching system PDSN obtains the customer attribute information that contains user gradation information from aaa server, after user gradation information noted, give travelling carriage according to this user gradation to obtaining the IP available address assignment with the corresponding IP address pool of its grade by packet switching system PDSN.
8, data business routing method according to claim 7 is characterized in that, also comprises step after step 2:
A newly-built customer group in aaa server, and with newly-built property file join in this group;
In aaa server, add a network address translation user, and with newly-built customer group be associated with this network address translation user.
9, data business routing method according to claim 8 is characterized in that, after step 6, also comprises step:
Whether packet switching system PDSN makes network address translation according to the decision of the IP address that obtains, if network address translation is made in decision, does the IP conversion or IP adds port translation.
10, data business routing method according to claim 9 is characterized in that, before the normal data service of carrying out the user, also comprises step:
The user is normal insert after, packet switching system PDSN sends the beginning message notifying aaa server that charges to aaa server and begins charging to the user.
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