CN102833750A - Message transmission method and device - Google Patents
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- CN102833750A CN102833750A CN2011101626358A CN201110162635A CN102833750A CN 102833750 A CN102833750 A CN 102833750A CN 2011101626358 A CN2011101626358 A CN 2011101626358A CN 201110162635 A CN201110162635 A CN 201110162635A CN 102833750 A CN102833750 A CN 102833750A
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Abstract
The invention discloses a message transmission method and device. The message transmission method comprises the following steps: judging whether the length of the message to be transmitted is more than the preset EAP Message MTU value, and transmitting the message to be transmitted by adopting the TCP (transmission control protocol) transmission form if the length of the message to be transmitted is more than the preset EAP Message MTU value. The message transmission method and device solve the problem in the prior that the UDp (user datagram protocol) connection authentication process can lead to low authentication success rate.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method for message transmission and device.
Background technology
Mobile global interoperability inserting of microwave (WiMAX; Worldwide Interoperability for Microwave Access) architecture of network comprises mobile subscriber terminal (MSS at least; Mobile Service Subscribe), BS (BS, Base Station), IAD (ASN-GW, ASN Access Gateway), core net (CSN; Connection Service Network) and application service provider (ASP, Application Service Provider) network.Wherein, MSS is a mobile subscriber equipment, and the user uses this devices accessing WiMAX network.BS handle eat dishes without rice or wine (R1 interface) and and ASN-GW between the R6 interface data.AGW handle and BS between the R6 interface data and and CSN between data.BS and ASN-GW are the parts of ASN; CSN is by router, authentication, mandate, charging (AAA; Authentication, Authorization, Accounting) server, dynamic host allocation protocol (DHCP; Dynamic Host Configuration Protocol) compositions such as server, customer data base, internet gateway device connect for WiMAX user provides IP, and are connected on the ASP through Ethernet.ASP comprises various application servers; For WiMAX user provides the upper layer application service; Like file host-host protocol (FTP, File Transfer Protocol) service, Hypertext Transmission Protocol (HTTP, Hyper Text Transfer Protocol) service and Email (Email) service etc.
According to WiMAX Forum technical work group (TWG; Technical Work Group) the up-to-date 802.16e standard and the network work group (NWG of eating dishes without rice or wine of promulgation; Network Work Group) the latest network architecture standard of promulgation; MSS will accomplish whole network insertion flow process (Initial Network Entry) flow process; Accomplish with the physical link of BS synchronously, obtain up-downgoing channel parameter, Initial Ranging (initial ranging) basic capability negotiating after, need carry out authentication process, whether what checking was being attempted inserting is validated user.
Existing authentication realization flow comprises following steps:
Step 1, AGW send authentication message AR_EAP_Transfer message and initiate authorizing procedure to the base station;
Step 2, base station send the authentication request in the AR_EAP_Transfer message to portable terminal as load through authentication message PKMv2-RSP/EAP-Transfer message;
Step 3, terminal send to the base station with network access identifier (NAI, Network Access Identifier) information through PKMv2-REQ/EAP-Transfer message;
Step 4, base station pass to AGW with the message content that MSS sends through AR_EAP_Transfer message;
Step 5, AGW pass through aaa server as load through Radius message with the EAP message content that the base station sends over;
Step 6, next between MSS and AAA, carrying out a series of information interaction, mainly is the mutual of challenge, response message;
After step 7, authentication finished, authenticating result sent MSS by aaa server to through AGW, BS.
The transmission of authentication message between R6 mouth of realizing now and the R3; All use UDP (UDP, User Datagram Protocol) connection to carry out, but UDP is non-Connection-oriented Protocol; Under the not good situation of network condition, be difficult to guarantee to send the accuracy of message.Also just therefore, existing at present authentication message sending method or the flow process that realizes has following problem:
If in the authentication process between BS and the AGW interface be the message-length of R6 mouth greater than MTU (MTU, the Maximum Transmission Unit) value of network, perhaps interface is that the length of certain message of R3 mouth is greater than the MTU of network between AGW and the aaa server; When message is passed through R6, R3; All use UDP to transmit, when this moment, UDP bag was sent to the IP layer, the IP consultation carried out burst to this length greater than the packet of MTU; So; Increased the possibility of packet loss, and UDP do not possess the function of automatic re-transmission, can cause the authentication success rate low.
In the authentication process, if with the mutual aaa server of AGW only be as acting on behalf of the Proxy server, the message of MSS feedback also need use the Radius protocol transmission to real aaa server through this Proxy aaa server so; The message that aaa server sends also need send to MS through this path; What the Radius agreement was used in message transfer is udp protocol, also is unreliable transmission, bigger at message-length; Under the bigger situation of network jumping figure, the authentication success rate is lower.
Can cause the lower problem of authentication success rate to adopting UDP to connect authorizing procedure in the correlation technique, not propose effective solution at present as yet.
Summary of the invention
The employing UDP connection authorizing procedure that exists in view of correlation technique can cause the lower problem of authentication success rate, and the present invention provides a kind of method for message transmission and device.
According to an aspect of the present invention, a kind of method for message transmission is provided, has comprised: whether the length of judging message waiting for transmission is greater than preset transmission boundary value EAP Message MTU; If adopt transmission control protocol TCP transmission means to transmit said message waiting for transmission.
Preferably, whether the length of judging message waiting for transmission also comprises: if not, then adopt UDP UDP transmission means to transmit said message waiting for transmission greater than after the preset transmission boundary value EAP Message MTU.
Preferably, when said message waiting for transmission is base station BS when being sent to the message transfer AR_EAP_Transfer message of access gateway AG W, said EAP Message MTU is arranged among the said BS; When said message waiting for transmission is said AGW request message Access-Request message of sending or said AGW when being sent to the AR_EAP_Transfer message of said BS, said EAP Message MTU is arranged among the said AGW; When said message waiting for transmission be authentication, mandate, charging aaa server send seize message Access-Challenge message or accept message Access-Accept message the time, said EAP Message MTU is arranged among the said AAA.
Preferably, said EAP Message MTU is 1500.
Preferably, said method is applied to the authorizing procedure of mobile subscriber terminal MSS access network.
Whether preferably, said employing TCP transmission means is transmitted said message waiting for transmission, comprising: exist TCP to be connected between the transmit leg of confirming said message waiting for transmission and the recipient; If not, then set up said TCP and connect, adopt said TCP transmission means to transmit said message waiting for transmission; If then adopt said TCP transmission means to transmit said message waiting for transmission.
Preferably, set up after the said TCP connection, also comprise: after authentication successfully finished or fails, said TCP connected continuation and keeps preset duration.
Preferably, set up after the said TCP connection, also comprise: if in the said preset duration, do not exist through said TCP and connect the message of sending, then delete said TCP and connect.
Preferably, said preset duration is 5 seconds.
According to a further aspect in the invention, a kind of massage transmission device is provided, has comprised: judge module, whether the length that is used to judge message waiting for transmission is greater than preset transmission boundary value EAP Message MTU; First transport module is used in said judge module judged result when being, adopts transmission control protocol TCP transmission means to transmit said message waiting for transmission.
Preferably, massage transmission device also comprises: second transport module is used in said judge module judged result adopting UDP UDP transmission means to transmit said message waiting for transmission for not the time.
In embodiments of the present invention, whether the length of judging message waiting for transmission is greater than preset transmission boundary value EAP Message MTU, if adopt transmission control protocol TCP transmission means to transmit message waiting for transmission.That is, added a parameter EAP Message MTU in embodiments of the present invention, whether used TCP to connect the boundary value that transmits as authentication message.For the to be transmitted message of length greater than MTU, when being sent to the IP layer, the IP agreement need not carried out burst to this packet, has reduced the possibility of packet loss, improves the authentication success rate; And; In the authentication process, if with the mutual aaa server of AGW only be as acting on behalf of the Proxy server, the message of MSS feedback also need use the Radius protocol transmission to real aaa server through this Proxy aaa server so; The message that aaa server sends also need send to MSS through this path; What the Radius agreement was used in message transfer is Transmission Control Protocol, is reliable transmission, bigger at message-length; Under the bigger situation of network jumping figure, connect with respect to UDP and can improve the authentication success rate.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the process chart according to the method for message transmission of the embodiment of the invention;
Fig. 2 is the process chart at BS side increase EAP Message MTU according to the embodiment of the invention;
Fig. 3 is the process chart at AGW side increase EAP Message MTU according to the embodiment of the invention;
Fig. 4 is the process chart at aaa server end increase EAP Message MTU according to the embodiment of the invention;
Fig. 5 is the annexation sketch map according to three newly-increased modules of the embodiment of the invention;
Fig. 6 is first kind of structural representation according to the massage transmission device of the embodiment of the invention;
Fig. 7 is second kind of structural representation according to the massage transmission device of the embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
The transmission of authentication message between R6 mouth of realizing now and the R3 all use the UDP connection to carry out, but UDP is non-Connection-oriented Protocol, under the not good situation of network condition, is difficult to guarantee to send the accuracy of message, and the authentication success rate is lower.
Though in AGW, aaa server; Weakness to UDP; Packet loss is judged, the function of overtime repeating transmission for this UDP transmission is added, the overtime retransmitting function that BS, AGW, aaa server all self have message, still; When message body length was big, this mechanism can't fundamentally solve the high problem of packet loss.
For solving the problems of the technologies described above, the embodiment of the invention provides a kind of method for message transmission, and its handling process is as shown in Figure 1, comprising:
Step S102, judge message waiting for transmission length whether greater than preset transmission boundary value EAP Message MTU;
If step S104 adopts transmission control protocol TCP transmission means to transmit message waiting for transmission.
In embodiments of the present invention, whether the length of judging message waiting for transmission is greater than preset transmission boundary value EAP Message MTU, if adopt transmission control protocol TCP transmission means to transmit message waiting for transmission.That is, added a parameter EAP Message MTU in embodiments of the present invention, whether used TCP to connect the boundary value that transmits as authentication message.For the to be transmitted message of length greater than MTU, when being sent to the IP layer, the IP agreement need not carried out burst to this packet, has reduced the possibility of packet loss, improves the authentication success rate; And; In the authentication process, if with the mutual aaa server of AGW only be as acting on behalf of the Proxy server, the message of MSS feedback also need use the Radius protocol transmission to real aaa server through this Proxy aaa server so; The message that aaa server sends also need send to MSS through this path; What the Radius agreement was used in message transfer is Transmission Control Protocol, is reliable transmission, bigger at message-length; Under the bigger situation of network jumping figure, connect with respect to UDP and can improve the authentication success rate.
Certainly, whether greater than after the preset transmission boundary value EAP Message MTU, judged result then still adopts UDP UDP transmission means to transmit message waiting for transmission for not as if the length of judging message waiting for transmission.
Type and transmission direction according to message to be transmitted are different; EAP Message MTU can respective stored in different servers or equipment; For example; When message waiting for transmission is base station BS when being sent to the message transfer AR_EAP_Transfer message of access gateway AG W, EAP Message MTU is arranged among the BS;
When message waiting for transmission be AGW request message Access-Request message of sending or AGW be sent to BS AR_EAP_Transfer message the time, EAP Message MTU is arranged among the AGW;
When message waiting for transmission be authentication, mandate, charging aaa server send seize message Access-Challenge message or accept message Access-Accept message the time, EAP Message MTU is arranged among the AAA.
Which kind of entity EAP Message MTU is arranged in, depends on the entity that sends message,, in the entity that sends message, EAP Message MTU is set that is, and the line correlation of going forward side by side is judged.
EAP Message MTU is 1500.
The method for message transmission that the embodiment of the invention provides can be applied to the authorizing procedure of mobile subscriber terminal MSS access network, improves the accuracy of authorizing procedure.
When the method for message transmission that the embodiment of the invention is provided is applied in the authorizing procedure, adopt the TCP transmission means to transmit message waiting for transmission, comprise following flow process:
Step 1, confirm message waiting for transmission transmit leg and recipient between whether exist TCP to be connected;
Step 2, is if not then set up TCP and is connected, and adopts the TCP transmission means to transmit message waiting for transmission;
If step 3 then adopts the TCP transmission means to transmit message waiting for transmission.
That is,,, then only need utilize existing TCP to connect transmission message waiting for transmission if existed TCP to connect if current the existence under the situation that TCP connects need be set up TCP earlier and connected.
Set up after the TCP connection, preferred, after authentication successfully finished or fails, TCP connected the continuation reservation and presets duration.
Set up after the TCP connection, preferred, if in the preset duration, do not have the message that connects transmission through TCP, then delete TCP and connect.
Usually, preset duration can be set according to actual conditions, and is preferred, can preset duration and be set to 5 seconds.
With specific embodiment the method for message transmission that the embodiment of the invention provides is described at present.
Embodiment one
The embodiment of the invention provides in a kind of authentication process the authentication message sending method under the longer situation of interaction message body between BS, AGW, the aaa server, can not influence the reliable transmission that can guarantee longer message than the transmission of short message again, comprises following aspect:
R6 mouth message AR_EAP_Transfer is BS-＞AGW such as direction, then in BS, needs to confirm whether the message after the encapsulation is longer; Judge whether to use TCP to connect and transmit this message; Whether long judgement is confirmed according to MTU, and this value needs and can be provided with on the backstage, is made as 1000 such as this value; If the loaded length of AR_EAP_Transfer message+UDP head length degree+IP head length degree sum surpasses this value, then need adopt the TCP transmission.And between BS and AGW, set up a TCP passage, this message is connected transmission through this.
For Access-Challenge, Access-Request message; Calculate the length after message load is encapsulated as Radius message; If should value greater than the MTU value, then between AGW and aaa server or AAA Proxy, set up Tcp and be connected, this message is transmitted through TCP.
The TCP of R6 mouth or R3 mouth connects foundation in a single day, and this connection will exist always in authentication process, in needs, transmits corresponding message; After authentication successfully finished or fails, this connected the time of continuing to keep 5 seconds, if within 5 seconds; There is not message through this connection transmission; The TCP that then deletes R3 mouth, R6 mouth successively connects, and helps to reduce the TCP number of connection that AGW, AAA need safeguard like this, and can guarantee that such connection does not need too frequent foundation.
This mode also has following characteristics; The MTU value of majority of network equipment is 1500 at present; The length threshold that transmits AR_EAP_Transfer, Access-Challenge, Access-Request message as the employing TCP that is provided with for base station or AGW, aaa server is greater than 1500 the time; If the length after these three message encapsulation does not surpass this value, then existing mode is still used in their transmission, promptly uses UDP to transmit.If certain or certain several message have surpassed this value, then this message uses the Tcp connection to transmit.In general, guaranteed the accuracy that transmits.
Embodiment two
Whether the background net management part of base station, AGW, aaa server is added a parameter EAP Message MTU, use TCP to connect the boundary value that transmits as authentication message.
In the module that base station foreground software adds message comparison, classification and the passage foundation of an authentication, its main effect is as shown in Figure 2:
Step S202, AR_EAP_Transfer message mutual between BS and the AGW and EAP Message MTU are compared, determine whether MTU greater than EAP Message, if, execution in step S204, if not, execution in step S210;
If the length value of step S204 message is bigger, whether this module check has existed the TCP between the AGW to connect, if, execution in step S208, if not, execution in step S206 and S208;
If step S206 does not have, then BS connects through the TCP that this module initiatively is initiated to AGW, and promptly BS is as client, and AGW is as service end;
Step S208, utilize TCP connect to send message;
If the length of step S210 message is little than the value of EAP Message MTU, then this module sends to original message with authentication message and transmits passage and transmit, and promptly uses the UDP passage to transmit.
In AGW, increase the module of comparison, classification and the passage foundation of responsible authentication related news, its major function is as shown in Figure 3, comprising:
Step S302, to needs send to the AR_EAP_Transfer message of BS, length and the EAP Message MTU that sends to the Access-Request message of AAA compares; Determine whether MTU greater than EAP Message; If; Execution in step S04 then, if not, execution in step S310 then;
If step S304 message-length is big than this value, then whether the AGW inspection exists the TCP of BS, aaa server to connect, if, execution in step S308 then, if not, then execution in step S306 and S308;
If step S306 does not exist then sets up;
Step S308, this message is transmitted through this TCP passage;
If the length of step S310 message is little than EAP Message MTU value, then to use original be that the UDP mode is transmitted for AR_EAP_Transfer, Access-Request message.
Same, at the aaa server end, needing to increase the comparison of being responsible for Access-Challenge, Access-Accept message, the module of classifying, set up transmission channel, its major function is as shown in Figure 4, comprising:
Step S402, the length and the EAP Message MTU of Access-Challenge, Access-Accept message compared, determine whether MTU greater than EAP Message, if, execution in step S404 then, if not, execution in step S410 then;
If the length of step S404 message body is big than EAP Message MTU; Then whether existed the TCP that transmits authentication message to be connected between this module check aaa server and the AGW, if, execution in step S408 then; If deny, then execution in step S406 and S408;
If not existing, step S406 sets up one;
Step S408, connect to transmit Access message through this;
Otherwise step S410 then transmits this message through the UDP mode.
In addition; If aaa server is only as Proxy, so, aaa server need judge also whether the Access-Request message-length that will transmit is big than EAP Message MTU; If; Then whether inspection exists the TCP between actual aaa server to connect, and does not exist and then sets up one, and use to connect and transmit Access-Request message.
It should be noted that the module that the responsible comparison in BS, AGW, aaa server, added, classification, passage are set up, all can accept, initiate to connect, can avoid the problem that can not receive and dispatch simultaneously like this, the annexation between three modules is as shown in Figure 5.
Initiate simultaneously under the initial situation about inserting at a plurality of MSS, the authentication message of back MSS can be used the TCP of front foundation to connect and transmit length than the big message of EAP Message MTU.
Based on same inventive concept, the embodiment of the invention also provides a kind of massage transmission device, and its structural representation is as shown in Figure 6, comprising:
In one embodiment, preferred, as shown in Figure 7; Massage transmission device can also comprise: second transport module 701; Link to each other with judge module 601, be used in judge module 601 judged results adopting UDP UDP transmission means to transmit message waiting for transmission for not the time.
From above description, can find out that the present invention has realized following technique effect:
In embodiments of the present invention, whether the length of judging message waiting for transmission is greater than preset transmission boundary value EAP Message MTU, if adopt transmission control protocol TCP transmission means to transmit message waiting for transmission.That is, added a parameter EAP Message MTU in embodiments of the present invention, whether used TCP to connect the boundary value that transmits as authentication message.For the to be transmitted message of length greater than MTU, when being sent to the IP layer, the IP agreement need not carried out burst to this packet, has reduced the possibility of packet loss, improves the authentication success rate; And; In the authentication process, if with the mutual aaa server of AGW only be as acting on behalf of the Proxy server, the message of MSS feedback also need use the Radius protocol transmission to real aaa server through this Proxy aaa server so; The message that aaa server sends also need send to MSS through this path; What the Radius agreement was used in message transfer is Transmission Control Protocol, is reliable transmission, bigger at message-length; Under the bigger situation of network jumping figure, connect with respect to UDP and can improve the authentication success rate.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a method for message transmission is characterized in that, comprising:
Whether the length of judging message waiting for transmission is greater than preset transmission boundary value EAP Message MTU;
If adopt transmission control protocol TCP transmission means to transmit said message waiting for transmission.
2. method according to claim 1; It is characterized in that; Whether the length of judging message waiting for transmission also comprises: if not, then adopt UDP UDP transmission means to transmit said message waiting for transmission greater than after the preset transmission boundary value EAP Message MTU.
3. method according to claim 1 is characterized in that, when said message waiting for transmission is base station BS when being sent to the message transfer AR_EAP_Transfer message of access gateway AG W, said EAP Message MTU is arranged among the said BS;
When said message waiting for transmission is said AGW request message Access-Request message of sending or said AGW when being sent to the AR_EAP_Transfer message of said BS, said EAP Message MTU is arranged among the said AGW;
When said message waiting for transmission be authentication, mandate, charging aaa server send seize message Access-Challenge message or accept message Access-Accept message the time, said EAP Message MTU is arranged among the said AAA.
4. according to each described method of claim 1-3, it is characterized in that said EAP Message MTU is 1500.
5. according to each described method of claim 1-3, it is characterized in that said method is applied to the authorizing procedure of mobile subscriber terminal MSS access network.
6. method according to claim 5 is characterized in that, said employing TCP transmission means is transmitted said message waiting for transmission, comprising:
Whether exist TCP to be connected between the transmit leg of confirming said message waiting for transmission and the recipient;
If not, then set up said TCP and connect, adopt said TCP transmission means to transmit said message waiting for transmission;
If then adopt said TCP transmission means to transmit said message waiting for transmission.
7. method according to claim 6 is characterized in that, sets up after the said TCP connection, also comprises:
After authentication successfully finished or fails, said TCP connected continuation and keeps preset duration.
8. method according to claim 7 is characterized in that, sets up after the said TCP connection, also comprises:
If in the said preset duration, do not exist through said TCP and connect the message of sending, then delete said TCP and connect.
9. method according to claim 7 is characterized in that, said preset duration is 5 seconds.
10. a massage transmission device is characterized in that, comprising:
Judge module, whether the length that is used to judge message waiting for transmission is greater than preset transmission boundary value EAP Message MTU;
First transport module is used in said judge module judged result when being, adopts transmission control protocol TCP transmission means to transmit said message waiting for transmission.
11. device according to claim 10 is characterized in that, also comprises: second transport module is used in said judge module judged result adopting UDP UDP transmission means to transmit said message waiting for transmission for not the time.
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