The transmission method of error indication parameters, system and gateway in the response message
Technical field
The present invention relates to the communications field, transmission method, system and the gateway of error indication parameters in particularly a kind of response message.
Background technology
In present EPS (data network system of evolution) system, the processing that may pass through a plurality of nodes with a kind of processing messages of agreement just can reach the final purpose end.These intermediate nodes also are not only simple forwarding message, but need to preserve and understand the parameter in the message.In this case, intermediate node and final purpose node all might go wrong because of the processing to message and cause occurring handling mistake.But in present core net, send in the response that the node of initial message receives the cause parameter of makeing mistakes of the intermediate treatment node that has only direct transmission to respond to return.
For example, the tunnel management message of GTP (GPRS Tunneling Protocol, GPRS Tunnel Protocol) can be by MME (Mobility Management Entity, Mobility Management Entity) or SGSN (Serving GPRS Support Node; Serving GPRS Support Node) sends to S-GW (Service Gateway; Gateway); S-GW gives P-GW (PDN GW, Packed Data Network Gateway, grouped data network gateway) through handling the tunnel management message of redispatching identical or different afterwards.P-GW is through after handling, and returns success or fails to S-GW, and S-GW sends response message based on the P-GW process result to MME again.Such message includes: the establishment bearer messages in the establishment default bearer request message in Attach (adhering to) process, Handover (switching) process and renewal bearer messages or the like.Fig. 1 is the tunnel management message sketch map that MME or SGSN send, and this situation is as shown in Figure 1.
On the opposite path, also there is such GTP Message Processing flow process.P-GW can send tunnel management message through GTP and give S-GW, sends to MME or SGSN by S-GW afterwards.MME/SGSN returns response after treatment and gives S-GW, and S-GW returns response according to the result of MME/SGSN again and gives P-GW.The tunnel management message sketch map that Fig. 2 sends for P-GW, this opposite situation is as shown in Figure 2.
In these flow processs; Whether the reason of makeing mistakes through in Tunnel Management (tunnel management) response message, carrying Cause parameter Indication message between the node is successful in P-GW as carrying this tunnel management operation in the response message of P-GW among Fig. 1 to the S-GW transmission; If concrete failure cause is then carried in failure in response message.If P-GW can't understand some parameter that sends among the S-GW, these unapprehended IE (Information Element, cell) have also been carried in the Cause parameter of P-GW to the response message of S-GW so.S-GW makes relevant treatment after the response of receiving P-GW, and returns to the SGSN/MME response message, has carried the Cause parameter of oneself in the message.Among the GTPv2, be that the definition of Cause parameter is following so because some IE can not be understood at present if make mistakes:
Wherein Offending IE is those IE that can not be understood.
Fig. 3 is the processing sketch map under PMIP (Proxy Mobile IP, the mobile IP agent) agreement, and is as shown in the figure, and under the situation for the S2a that uses the PMIP agreement and S8b interface and S2b and S8b, it is handled in like manner.Though it is different that PMIP and the protocol handler of GTP are shaped on institute, Cause parameter problem and GTP entrained in the message are similar.And above description about GTP and PMIP is equally applicable to two or more all in 3GPP core net interfaces and uses the situation of same agreement through a flow process of intermediate node completion, accomplishes the situation of a flow process through intermediate node as using Diameter.
Can know that by above-mentioned flow process current technology is not enough below existing: some message is after sending to S-GW by MME or SGSN, and S-GW also can send to P-GW through the S5/S8 interface with same parameter through processing and handle.MME or SGSN are when receiving the response message of S-GW, if this response message misdirection, but MME or SGSN can't learn from the Cause parameter that S-GW obtains that but this mistake still is the mistake of P-GW for the mistake of S-GW.If when having carried Offending IE in this cause parameter, it is that S-GW does not understand or P-GW does not understand that MME or SGSN can't distinguish this parameter of makeing mistakes.In like manner, P-GW can't error differentiating be to be sent by P-GW or S-GW also when receiving the tunnel management response message of S-GW, and can not distinguish Offending IE is that S-GW can't understand or MME can't understand.
Also through the situation of intermediate node completion handling process, this problem exists equally for the same agreement of other use.Though other agreements also do not have Offending IE at present, indicate unsharp problem to exist equally for the reason of makeing mistakes.
Summary of the invention
The invention provides transmission method, system and the gateway of error indication parameters in a kind of response message;, two or more interfaces all in core net in order to solve use same agreement; And when accomplishing the forwards flow process, can correctly indicate the wrong of generation and the problem of the node that makes a mistake through intermediate node.
The invention provides the transmission method of error indication parameters in a kind of response message, comprise the steps:
Intermediate node receives first response message of lower level node feedback;
When intermediate node is confirmed to carry error indication parameters in first response message, in the second identified in response messages error indication parameters that feeds back to upper layer node and the occurrence node of error indication parameters;
Intermediate node feeds back to upper layer node with second response message;
Wherein, said lower level node, intermediate node and upper layer node are the node in the core net and use same protocol communication that said first response message and second response message are feedback tunnel management Message Processing result's response messages.
Preferably, second response message that said intermediate node will identify error indication parameters and error indication parameters occurrence node feeds back to upper layer node, is specially:
If do not identify the occurrence node of said error indication parameters in the error indication parameters, then in second response message, the occurrence node of this error indication parameters is designated lower level node after, second response message is fed back to upper layer node;
Or,
If identified the occurrence node of said error indication parameters in the error indication parameters, then after the occurrence node of this error indication parameters of second identified in response messages that feeds back to upper layer node and error indication parameters, second response message fed back to upper layer node.
Preferably, as P-GW during to the MME/SGSN feedback response message, said S-GW is an intermediate node, and MME/SGSN is a upper layer node, and P-GW is a lower level node;
Or as MME/SGSN during to the P-GW feedback response message, said S-GW is an intermediate node, and P-GW is a upper layer node, and MME/SGSN is a lower level node.
Preferably, the occurrence node of said error indication parameters and error indication parameters is through the Cause parameter identification of second response message.
Preferably, said tunnel management message is the tunnel management message of sending between S4/S11 interface and the S5/S8 interface under the GTP agreement, or the tunnel management message of sending between S2a/S2b interface and the S8b interface under the PMIP agreement.
The present invention also provides the transmission system of error indication parameters in a kind of response message, comprising:
Receiver module is used to receive first response message of lower level node to the intermediate node feedback;
Determination module is used for after definite first response message carries error indication parameters, triggering feedback module;
Feedback module is used for after being determined module and triggering, and in the second identified in response messages error indication parameters that feeds back to upper layer node and the occurrence node of error indication parameters, and second response message is fed back to upper layer node;
Wherein, said lower level node, intermediate node and upper layer node are the node in the core net and use same protocol communication that said first response message and second response message are feedback tunnel management Message Processing result's response messages.
Preferably, said feedback module comprises:
Whether judging unit has been used for the misjudgment indication parameter and has identified the occurrence node of said error indication parameters, otherwise triggered first feedback unit, is then to trigger second feedback unit;
First feedback unit is used for after second response message is designated lower level node with the occurrence node of this error indication parameters, second response message being fed back to upper layer node;
Second feedback unit is used for after the occurrence node of this error indication parameters of second identified in response messages that feeds back to upper layer node and error indication parameters, second response message being fed back to upper layer node.
Preferably, as P-GW during to the MME/SGSN feedback response message, said S-GW is an intermediate node, and MME/SGSN is a upper layer node, and P-GW is a lower level node;
Or as MME/SGSN during to the P-GW feedback response message, said S-GW is an intermediate node, and P-GW is a upper layer node, and MME/SGSN is a lower level node.
Preferably, said feedback module is further used for through after the occurrence node of said error indication parameters of the Cause of second response message parameter identification and error indication parameters, feeding back to upper layer node.
Preferably, receiver module is further used for receiving first response message of lower level node to intermediate node feedback tunnel management Message Processing result;
Feedback module is further used for feedback tunnel management Message Processing result's second response message is fed back to upper layer node.
Preferably, receiver module is further used for through S4/S11 interface under the GTP agreement and S5/S8 interface, or receives first response message through S2a/S2b interface under the PMIP agreement and S8b interface;
Feedback module is further used for through S4/S11 interface under the GTP agreement and S5/S8 interface, or through S2a/S2b interface under the PMIP agreement and S8b interface second response message is fed back to upper layer node.
The present invention provides a kind of gateway again, comprising:
Receiver module is used to receive first response message that lower level node feeds back;
Determination module is used for after definite first response message carries error indication parameters, triggering feedback module;
Feedback module is used for after being determined the module triggering, and in the occurrence node of the second identified in response messages error indication parameters and error indication parameters, and upper layer node is fed back second response message downwards;
Wherein, said gateway, lower level node and upper layer node are the node in the core net and use same protocol communication that said first response message and second response message are feedback tunnel management Message Processing result's response messages.
Preferably, said feedback module comprises:
Whether judging unit has been used for the misjudgment indication parameter and has identified the occurrence node of said error indication parameters, otherwise triggered first feedback unit, is then to trigger second feedback unit;
First feedback unit is used for after second response message is designated lower level node with the occurrence node of this error indication parameters, feeding back second response message;
Second feedback unit is used for after the occurrence node of this error indication parameters of second identified in response messages that feeds back to upper layer node and error indication parameters, feeding back second response message.
Preferably, receiver module is further used for through S4/S11 interface under the GTP agreement and S5/S8 interface, or receives first response message through S2a/S2b interface under the PMIP agreement and S8b interface;
Feedback module is further used for through S4/S11 interface under the GTP agreement and S5/S8 interface, or feeds back second response message through S2a/S2b interface under the PMIP agreement and S8b interface.
Beneficial effect of the present invention is following:
In the present invention, when intermediate node receives the response message of lower level node feedback, just can be in the identified in response messages error indication parameters that feeds back to upper layer node and the occurrence node of error indication parameters.Thereby make last node after having received respective response message; If indicated the processing mistake in the response message; Just can know that the mistake of finally receiving all is the mistake that on which node, occurs; Thereby remedied the problem that does not have the mechanism of similar solution in the agreement of present core net, made the execution error handling processing that network node can be correct.
Description of drawings
Fig. 1 is the tunnel management message sketch map that MME described in the background technology or SGSN send;
Fig. 2 is the tunnel management message sketch map that P-GW described in the background technology sends;
Fig. 3 is the processing sketch map under the PMIP agreement described in the background technology;
Fig. 4 is the transmission method implementing procedure sketch map of error indication parameters in the response message described in the embodiment of the invention;
Fig. 5 is the implementing procedure sketch map of error of transmission indication parameter after MME described in the embodiment of the invention or the SGSN tunnel management message of sending;
Fig. 6 is the implementing procedure sketch map of error of transmission indication parameter after the tunnel management message of sending of P-GW described in the embodiment of the invention;
Fig. 7 is the transmission system structural representation of error indication parameters in the response message described in the embodiment of the invention;
Fig. 8 is a gateway structural representation described in the embodiment of the invention.
Embodiment
Describe below in conjunction with the accompanying drawing specific embodiments of the invention.
During the present invention implements; Mainly be when between a plurality of nodes, sending core net message of the same race; If there is node to make a mistake, then the intermediate treatment node when sending the node of initial request message, carries the node that makes a mistake and the error indication parameters of this node in feedback response message in response message; Make a mistake if any a plurality of nodes, then carry the error indication parameters of each node of makeing mistakes.
Fig. 4 is the transmission method implementing procedure sketch map of error indication parameters in the response message; In the enforcement,, feed back to upper layer node step by step by lower level node according to the direction of feedback response message; Last to the node that sends initial request message; The node of claiming in the enforcement to send between the node of node and initial feedback response message of initial request message is an intermediate node, and is then as shown in the figure, can comprise the steps:
Step 401, intermediate node receive first response message of lower level node feedback.
When step 402, intermediate node are confirmed to carry error indication parameters in first response message, in the second identified in response messages error indication parameters that feeds back to upper layer node and the occurrence node of error indication parameters.
Step 403, intermediate node feed back to upper layer node with second response message.
In this step,, can the occurrence node of this error indication parameters just be designated this lower level node so if do not identify the occurrence node of error indication parameters in the error indication parameters.That is, if do not identify the occurrence node of said error indication parameters in the error indication parameters, then in second response message, the occurrence node of this error indication parameters is designated lower level node after, second response message is fed back to upper layer node.
If identified the occurrence node of said error indication parameters in the error indication parameters, then after the occurrence node of this error indication parameters of second identified in response messages that feeds back to upper layer node and error indication parameters, second response message fed back to upper layer node.
In step 403, when the occurrence node of sign error indication parameters and error indication parameters, can identify through the Cause parameter of response message.This response message can be feedback tunnel management Message Processing result's a response message.
Tunnel management message can be the tunnel management message of sending between S4/S11 interface and the S5/S8 interface under the GTP agreement; Though it is different that PMIP and the protocol handler of GTP are shaped on institute; But Cause parameter problem and GTP entrained in the message are similar, so tunnel management message also can be the tunnel management message of sending between S2a/S2b interface and the S8b interface under the PMIP agreement.It should be noted that; Can know by above-mentioned execution mode in GTP and PMIP agreement; This scheme is not limited in this two kinds of agreements; It is equally applicable to all in the 3GPP core net, two or more interfaces and uses same agreement, and accomplishes the situation of a flow process through intermediate node, also can adopt such as the enforcement of using Diameter to accomplish a flow process through intermediate node.
For make need through intermediate node transmit the initial sending node of message can be better according to response message judge the node of makeing mistakes be which receiving node and specifically which receiving node gone out which mistake, which parameter and can not have been understood etc. by which node, just need in giving the response message of initial sending node, carry the error message of makeing mistakes node and taking place above that.Being example with GTP below, is intermediate node with S-GW, and MME/SGSN is the upper layer node of S-GW feedback response message, and P-GW is that example describes for the lower level node to the S-GW feedback response message; In like manner, when P-GW sends tunnel management message to MME/SGSN, during the MME/SGSN feedback response message, MME/SGSN is the lower level node of S-GW, and P-GW is the upper layer node of S-GW.In example, S-GW carries outside the Cause parameter of S-GW in giving the response message of MME/SGSN, also carries the Cause parameter of P-GW; In like manner, carry the Cause parameter of also carrying MME outside the Cause parameter of S-GW at S-GW in the response message of P-GW.Obviously, if S-GW does not make a mistake, the Cause parameter of S-GW can not carried in the response message of giving MME/SGSN or P-GW.
Fig. 5 is the implementing procedure sketch map of error of transmission indication parameter after MME or the SGSN tunnel management message of sending, and is as shown in the figure, may further comprise the steps:
Step 501, MME/SGSN send Tunnel Management request message through S4/S11 I/F (Interface, interface) to S-GW;
Step 502, S-GW send Tunnel Management request message through the S5/S8 interface to P-GW;
Step 503, P-GW feed back Tunnel Management response message, the Cause parameter of having carried P-GW in the response message through the S5/S8 interface to S-GW;
Step 504, S-GW, have carried the Cause parameter of P-GW, or have carried the Cause parameter of S-GW to MME/SGSN feedback Tunnel Management response message through the S4/S11 interface in the response message.
The implementing procedure sketch map of error of transmission indication parameter is as shown in the figure after the tunnel management message that Fig. 6 sends for P-GW, may further comprise the steps:
Step 601, P-GW send Tunnel Management request message through the S5/S8 interface to S-GW;
Step 602, S-GW send Tunnel Management request message through the S4/S11 interface to MME/SGSN;
Step 603, MME/SGSN feed back Tunnel Management response message, the Cause parameter of having carried MME/SGSN in the response message through the S4/S11 interface to S-GW;
Step 604, S-GW, have carried the Cause parameter of MME/SGSN, or have carried the Cause parameter of S-GW to P-GW feedback Tunnel Management response message through the S5/S8 interface in the response message.
Obviously, this execution mode is equally applicable in the core net other agreements that need intermediate node handles to transmit, as also can be by this enforcement during processing forward message between S2a/S2b and S8b under the PMIP.
The present invention also provides the transmission system of error indication parameters in a kind of response message, and a kind of gateway, describes below in conjunction with the embodiment of accompanying drawing to native system and gateway.
Fig. 7 is the transmission system structural representation of error indication parameters in the response message; As shown in the figure; Comprise some nodes that a response message relates in the system in repeating process, claim in the system that the node of transmission response message is a lower level node, the node that receives response message is a upper layer node; The node of in two nodes, transmitting is an intermediate node; With three nodes wherein is that example describes, promptly as upper layer node 701, intermediate node 702, the lower level node 703 shown in the figure, and by also comprising in the visible system of figure:
Receiver module 704 is used to receive first response message of lower level node 703 to intermediate node 702 feedbacks;
Determination module 705 is used for after definite first response message carries error indication parameters, triggering feedback module;
Feedback module 706 is used for after being determined module and triggering, and in the second identified in response messages error indication parameters that feeds back to upper layer node and the occurrence node of error indication parameters, and second response message is fed back to upper layer node 701.
In the enforcement, feedback module can comprise:
Whether judging unit has been used for the misjudgment indication parameter and has identified the occurrence node of said error indication parameters, otherwise triggered first feedback unit, is then to trigger second feedback unit;
First feedback unit is used for after second response message is designated lower level node with the occurrence node of this error indication parameters, second response message being fed back to upper layer node;
Second feedback unit is used for after the occurrence node of this error indication parameters of second identified in response messages that feeds back to upper layer node and error indication parameters, second response message being fed back to upper layer node.
In the practical implementation, as P-GW during to the MME/SGSN feedback response message, can be with S-GW as intermediate node, MME/SGSN is as upper layer node, and P-GW is as lower level node;
Perhaps, as MME/SGSN during to the P-GW feedback response message, can be with S-GW as intermediate node, P-GW is as upper layer node, and MME/SGSN is as lower level node.
When identifying, feedback module can be through feeding back to upper layer node after the occurrence node of said error indication parameters of the Cause of response message parameter identification and error indication parameters.
In the enforcement, what receiver module received is first response message of lower level node to intermediate node feedback tunnel management Message Processing result; Further, receiver module can pass through S4/S11 interface and S5/S8 interface under the GTP agreement, or receives first response message through S2a/S2b interface under the PMIP agreement and S8b interface.
Feedback module is that the response message that feeds back tunnel management Message Processing result is fed back to upper layer node.Further, feedback module can pass through S4/S11 interface and S5/S8 interface under the GTP agreement, or through S2a/S2b interface under the PMIP agreement and S8b interface response message is fed back to upper layer node.
Fig. 8 is the gateway structural representation, and is as shown in the figure, in gateway, can comprise:
Receiver module 704 is used to receive first response message;
Determination module 705 is used for after definite first response message carries error indication parameters, triggering feedback module;
Feedback module 706 is used for after being determined the module triggering, in the occurrence node of the second identified in response messages error indication parameters and error indication parameters, and feeding back second response message.
Said feedback module can comprise:
Whether judging unit has been used for the misjudgment indication parameter and has identified the occurrence node of said error indication parameters, otherwise triggered first feedback unit, is then to trigger second feedback unit;
First feedback unit is used for after second response message is designated lower level node with the occurrence node of this error indication parameters, feeding back second response message;
Second feedback unit is used for after the occurrence node of this error indication parameters of second identified in response messages that feeds back to upper layer node and error indication parameters, feeding back second response message.
In the enforcement, receiver module can pass through S4/S11 interface and S5/S8 interface under the GTP agreement, or receives first response message through S2a/S2b interface under the PMIP agreement and S8b interface;
Feedback module can pass through S4/S11 interface and S5/S8 interface under the GTP agreement, or through S2a/S2b interface under the PMIP agreement and S8b interface second response message is fed back to upper layer node.
Can know that by above-mentioned enforcement in the EPS system, the processing that may pass through a plurality of nodes with a kind of processing messages of agreement just can reach the final purpose end.These intermediate nodes also are not only simple forwarding message, but need to preserve and understand the parameter in the message.In this case, intermediate node and final purpose node all might go wrong because of the processing to message and cause occurring handling mistake.After adopting the present invention; The initial node that sends message is after having received respective response message; If indicated the processing mistake in the response message; Just can know that the mistake of finally receiving all is the mistake that on which node, occurs, thereby remedy the problem that does not have the mechanism of similar solution in the agreement of present EPS core net, make the execution error handling processing that network node can be correct.
Like the example that is embodied as of above-mentioned GTP, the tunnel management message of GTPv2 is being sent between the MME and between S-GW and the P-GW, when MME need know that the node of makeing mistakes is S-GW or P-GW, so that when determining further processing procedure; Same, for the bearer management process that P-GW initiates, P-GW also needs same information.After the embodiment of the present invention; Though because different nodes are understood the function possibility difference of GTP; But MME or P-GW can make corresponding judgment according to the error indication parameters in the response message that node returned; That is, carry the reason of makeing mistakes of a plurality of nodes in the error reason parameter in a response message, mistake occurs thereby can make the receiving terminal of response message tell concrete which node.
In like manner; The present invention has also solved the transmission problem of error indication parameters between the S2a that uses the PMIP agreement and S8b interface and S2b and the S8b interface; It also can be applicable to PDNGW and vPCRF (the Visited Policy Control and Charging Rules Function that uses Diameter; The policy control and the charging rule functions on visit ground) and hPCRF (Home Policy Control and Charging RulesFunction, the policy control in local and charging rule functions) between the transmission of error indication parameters.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.