CN1794872A - Method of stopping conversation in radio access network - Google Patents

Abstract

The invention discloses a session termination method in a wireless access network. Including A. ANS-DP triggers the session termination process, and sends the termination session information to the mobile IP (MIP) client agent. The session information includes the termination session ID; B. The MIP client agent terminates the session according to the termination information in the termination information. IDs are processed sequentially, if after the first session ID is released, the PoA address corresponding to the first session ID has other corresponding sessions, then enter step D, otherwise enter step C; C, the MIP client agent initiates the first abort session The MIP de-registration operation; D, the MIP client agent will process the first session information that needs to be terminated, and terminate the first session; E, repeat step B until all judgments that need to terminate the session ID are completed; F, the MIP client The end agent sends a session termination result message to the ASN-GWDP unit. The present invention can solve the problem of one or more or all sessions on the tunnel being terminated when multiple sessions are established on one tunnel.

Description

A method for session termination in wireless access network

technical field

The invention relates to the communication field, in particular to a session termination method in a wireless access network.

Background technique

With the vigorous development of Internet services and the wide application of wireless networks, wireless systems such as General Packet Radio Service (GPRS), Third Generation Mobile Communications (3G), Worldwide Interoperability for Microwave Access (WiMAX) and post 3G (B3G) have gained Lots of applications and attention. The increase in the number of users and the increase in user requirements provide new requirements for the wireless access network system: it is required to support multiple services with large capacity, large data volume and different service quality requirements. That is, the function of multi-session management.

The wireless access network mainly completes the function of forwarding or routing packet services between the service provisioning network and mobile users. Regardless of other internal devices in the access network, we will use the network architecture system shown in Figure 1 in the subsequent technical description. The functions of each network element in Figure 1 are explained as follows:

Access service network (ASN): ASN is defined as a set of network functions that provide wireless access services for WiMAX terminals. ASN includes base station (BS) and access service network gateway (ASN-GW) network elements. ASN mainly provides the following functions:

BS functions:

- Provides L2 connectivity between BS and Mobile Subscriber Station (MSS)

- Radio resource management

-Measurement and power control

- Compression and encryption of air interface data

Functions of ASN-GW:

- Provide proxy function for MSS authentication, authorization and accounting functions

-Support network discovery and selection of Network Service Provider (NSP)

- Provide MSS with L3 information relay function (such as IP address allocation)

- Radio resource management

-ASN-GW can be divided into (Access Service Network Gateway Decision Point) ASN-GW DP function and (Access Service Network Gateway Execution Point) ASN-GW EP function in terms of logical function, where DP is mainly for processing some control planes The entity of the function, and the EP is the entity that handles the function of the data plane. Whether they are physically separated or not is not limited in the present invention.

- Tunnel management between ASN-CSN, which is equivalent to the external agent (FA) in mobile IP technology. In addition to the above functions, it can also include (optional functions):

-Intra-ASN switching

-MSS paging and location management

-Visit location registration

Authenticator+Proxy MIP Client: (In the case of PMIP, Authenticator and MIP client proxy; in the case of CMIP, only Authenticator)

- Provide proxy function for MSS authentication, authorization and accounting functions

-The role of acting as a MIP client, binds the IP address of the MSS to the HA, and establishes a tunnel between the FA and the HA for the IP address.

Connection Service Network (CSN): CSN is defined as providing IP connection services for WiMAX terminals. CSN mainly provides the following functions:

- IP address allocation for MSS

-Internet access

-(authentication, authentication, billing proxy) AAA proxy or server

-User-based authorization control

- The tunnel from ASN to CSN is equivalent to the home agent (HA) in mobile IP technology

- Billing of WiMAX users and settlement between operators

- Tunnel between CSNs in case of roaming

-Switching between ASNs

-Various WiMAX services (such as location-based services, multimedia multicast and broadcast services, IP multimedia subsystem services)

MSS: MSS is a mobile user equipment, and the user uses this equipment to access the WiMAX network.

From the perspective of the data plane carried by the ASN IP, the downlink MSS packet service datagram is transmitted from the HA of the CSN to the ASN through the established tunnel (R3 interface) between the HA and the ASN-GW in the ASN, and sent by the ASN -GW sends to BS through ASN internal interface, and then utilizes R1 interface between BS and MSS to send data of MSS to MSS. Uplink datagrams are also sent from MSS to ASN, and sent to the external network through the tunnel between ASN GW and HA.

From the aspect of session service, any session (session) between an MSS and a service network needs to utilize the IP bearer and transmission functions of the ASN. However, for different sessions, it is possible that all sessions are carried by the same tunnel between ASN-GW and HA, or that different sessions are carried by different tunnels between ASN-GW and HA, or different The session is carried by the tunnel established between the ASN-GW and the HA in different CSNs. In the concept of mobile IP, if there are multiple tunnels for an MSS, there will be multiple PoA addresses for the MSS.

Therefore, when the session is terminated, the process of the session termination will be different for different situations. How to complete the session termination process in a timely and effective manner is very important for the reuse of system resources and the improvement of system capacity. The present invention will propose an improved method of session management when a session is terminated.

In PMIP mode, the MIP client agent is in the ASN, and the processing of MIP establishment/release and other request and response messages is transparent to the MSS. The MIP client agent completes all MIP through FA or directly with HA. Initiation and reception of request and response messages such as establishment/release, so as to establish/release the IP tunnel between ASN-GW and HA.

In the mobile IP (MIP) process, the MIP client is on the MSS, and the MSS completes all MIP establishment/release and response message initiation and reception operations through the FA or directly with the HA to establish/release Release the IP tunnel between ASN-GW and HA. For this mode, we call it CMIP.

Prior art 1, in the proposal 050607_NWG_01r8_PMIP-Inter-ASN-mobility-accepted, a PMIP-based session termination method and process are proposed. After the session termination process is triggered, the ASN-GW DP unit assumes the mobile IP client to the ASN. The functional network element initiates a session termination request (R3_Session_Release.Request) and provides the identifier of the MSS, so that the MIP client initiates the MIP de-registration process for releasing the tunnel between the FA and the HA. Until the MIP client receives the MIP de-registration response, the MIP client returns the session termination result to the ASN-GW DP unit through the session termination response (R3_Session_Release.Reply). This completes the entire session termination process. The whole process is shown in Figure 2 below.

S011, after the ASN-GW DP unit triggers the session termination process, it initiates a session termination request (R3_Session_Release.Request) to the MIP client agent in the ASN, and provides the identifier of the MSS in the message, and notifies the MIP client agent to initiate Release the MIP de-registration process of the tunnel between the FA and HA of the MSS;

S012. The MIP client agent sets the Lifetime to 0 in the MIP registration request and sends it to the FA.

S013. The ASN-GW FA forwards the received MIP de-registration request of the MSS to the HA.

S014. The HA releases the tunnel between the FA corresponding to the unbound PoA address requested in the registration message and the HA; and sends a de-registration response to the FA.

S015. The FA forwards the de-registration response to the MIP client agent.

S016, after the MIP client agent receives the de-registration response, it initiates a session termination response message (R3_Session_Release.Request) to the ASN-GW DP unit, and provides the MSS identifier in the message, and notifies the ASN-GWDP unit of the session of the MSS has been aborted.

If a tunnel carries multiple sessions, then using the method of prior art 1, the termination process of any session will cause all other sessions carried on the same tunnel to be terminated at the same time. That is to say, this method is not suitable for the situation that multiple sessions are simultaneously carried on a tunnel between the ASN-GW and the HA.

Furthermore, when multiple tunnels carry multiple sessions for the MSS, the session termination process on the multiple tunnels cannot be handled quickly, and the session termination process cannot be effectively processed.

Prior art 2 proposes a process and method for CMIP-based session termination in the proposal 050602_NWG_05_Client_MIP_Architecture-accepted, mainly for the processing process when the MIP client is on the MSS. After the ASN-GW DP unit triggers the session termination process, it initiates a session termination request (R3_Session_Release.Request) to the ASN-GWFA (EP), and provides the identification of the MSS, and the ASN-GW FA sends an FA advertisement to the MSS, Notify the MIP client on the MSS to initiate the MIP de-registration process for releasing the tunnel between the FA and the HA. The ASN-GW FA returns the session termination result to the ASN-GW DP unit through the session termination response (R3_Session_Release.Reply) until the HA responds to the MIP registration response and is relayed to the MSS by the ASN-GW FA. This completes the entire session termination process. The whole process is shown in Figure 3.

S021. After triggering the session termination process, the ASN-GW DP unit initiates a session termination request (R3_Session_Release.Request) to the ASB-GW FA (EP), and provides the identifier of the MSS in the message.

S022. The ASN-GW FA sends an FA advertisement to the MSS, notifying the MIP client on the MSS to initiate a MIP de-registration process for releasing the tunnel between the FA and the HA.

S023. The MSS client sets the Lifetime to 0 in the MIP registration request and sends it to the FA.

S024. The ASN-GW FA forwards the received MIP de-registration request of the MSS to the HA.

S025. The HA releases the tunnel between the FA corresponding to the unbound PoA address requested in the registration message and the HA; and sends a de-registration response to the FA.

S026. The FA forwards the de-registration response to the MSS.

S027. Simultaneously, the FA sends a session termination response (R3_Session_Release.Reply), and provides the identifier of the MSS in the message.

If a tunnel carries multiple sessions, then using the method of prior art 2, any session termination process will cause all other sessions carried on the same tunnel to also be terminated at the same time. That is to say, the solution of the prior art 2 is not suitable for the situation that multiple sessions are simultaneously carried on a tunnel between the ASN-GW and the HA.

Furthermore, when multiple tunnels carry multiple sessions for the MSS, the session termination process on the multiple tunnels cannot be handled quickly, and the session termination process cannot be effectively processed.

Contents of the invention

The invention provides a session termination method in a wireless access network, which is used to solve the problem that the session termination process in the prior art cannot be simultaneously applied to multiple sessions carried on the same tunnel.

The inventive method comprises:

A method for session termination in a wireless access network, comprising the following steps:

A, ANS-DP triggers the session suspension process, and the suspension session information is sent to the mobile IP (MIP) client agent, and the session information includes the suspension session ID;

B. The MIP client agent performs sequential processing according to the suspension session ID in the suspension information. If the first session ID is released, the PoA address corresponding to the first session ID has other corresponding sessions, then enter step D, otherwise enter step C;

C, the MIP client agent initiates the MIP de-registration operation of the first aborted session;

D. The MIP client agent processes the first session information that needs to be terminated, and terminates the first session;

E. Repeat step B until all the session IDs that need to be terminated are judged to be completed;

F. The MIP client agent sends a session termination result message to the ASN-GW DP unit.

The suspended session information also carries the suspended session Point of Attachment (POA) address and/or the suspended session Home Agent (HA) address.

In the step A, the suspended session information also includes the session ID corresponding to the POA address corresponding to the suspended session ID, and in the step B, the other sessions are obtained from the Abort session information.

The MIP client agent stores an out-of-session Point of Attachment (POA) address and/or an out-of-session Home Agent (HA) address.

In the method, the MIP client proxy stores the session ID corresponding to the POA address corresponding to the suspended session ID, and in the step B, the other sessions are obtained from the MIP client proxy.

Described step C comprises:

C1, the MIP client agent initiates the MIP to go to register, and the POA address and the HA address of the (mobile subscriber station) MSS are forwarded to the ASN-GW FA by a message, and in the message, the deregistration flag is set;

C2. The ASN-GW FA forwards the message to the HA, and notifies the HA to release the tunnel bound by the POA address;

C3. The HA sends a MIP de-registration response to the MIP client agent via the ASN-GW FA.

Described step D comprises:

D1, update the session table and session information corresponding to the MSS in the MIP client agent, and perform the session end operation;

D2. Send the relevant abort session information from the MIP client agent to the ASN-GW FA, and release the session resource at the ASN-GW FA;

D3. The ASN-GW FA sends the session termination operation result information to the MIP client agent.

In the step D3, the operation result information includes all processing results that need to terminate the session.

In the step F, the session termination result message includes all processing results that need to terminate the session.

A method for session termination in a wireless access network, comprising the following steps:

A, ANS-DP triggers the session suspension process, and sends the suspension session information to the MIP client agent, and the session information includes the suspension session ID;

B, MIP client agent is processed successively for each suspension session, judges whether this suspension session is the last session of corresponding PoA address, if just enter C, otherwise enter step D;

C. The MIP client agent initiates the MIP de-registration operation of the session corresponding to the first POA;

D. The MIP client will need to terminate the session information for processing, and terminate the session;

E. Repeat step B until the POA addresses corresponding to all session IDs are judged;

F. The MIP client agent sends a session termination result message to the ASN-GW DP unit.

A method for session termination in a wireless access network, comprising the following steps:

A, the access service network decision point (ANS-DP) triggers the session termination process, and the suspension session information is sent to the (access service network gateway external agent) ASN-GW FA unit, and the session information includes the suspension session ID;

B. The ASN-GWFA unit obtains the first session ID corresponding to the first POA address, and judges whether the first session ID is included in the suspended session ID, if yes, enter step C, if not, enter step D;

C. The MSS unit initiates the MIP de-registration operation of the session corresponding to the first POA;

D. The ASN-GW FA unit will need to terminate the session information for processing, and terminate the session;

E. Repeat step B until the session IDs corresponding to all POAs are judged to be completed;

F. The ASN-GW FA sends a session termination result message to the ASN-GW DP unit.

In the step A, the abort session message also includes the first session ID corresponding to the first POA address, and in the step B, the first session ID is obtained from the Abort session message.

The first session message corresponding to the first POA address is stored in the ASN-GWDP, and in the step B, the first session ID is obtained in the ASN-GW DP.

Described step C comprises:

C1. The ASN-GWFA sends an external agent (FA) advertisement message to the MSS, notifying the MSS that the tunnel corresponding to the PoA address needs to be released;

C2, the MIP client initiates the MIP de-registration process, sends the PoA address of the MSS and the forwarding address to the ASN-GW FA through the de-registration message, and sets the de-registration identifier in the message;

C3. The FA forwards the de-registration message to the HA, and notifies the HA to release the tunnel between the FA and the HA bound to the PoA address of the MSS;

C4. The HA sends the MIP de-registration response message to the MIP client agent through the FA.

In the step C1, the notification is completed by sending the FA advertisement message to the MSS through the ASN-GW FA.

In the step C1, in the FA advertisement message, the FA advertisement message notifies the MSS of de-registration of the corresponding PoA address.

In the FA advertisement message, the destination address in the IP header is set as the PoA address.

In the step C1, the ASN-GW FA completes the notification through the signaling/message on the R6 interface between the BS and the air interface management plane message between the BS and the MSS.

Described step D comprises:

D1. Update the session table and information corresponding to the MSS in the ASN-GW FA, and perform the operation of session termination.

In the step F, the result message includes all processing results that need to terminate the session.

A method for session termination in a wireless access network, comprising the following steps:

A, ANS-DP triggers the session suspension process, and sends the suspension session information to the MIP client agent, and the session information includes the suspension session ID;

B. ASN-GW FA processes each suspended session sequentially, and judges whether the suspended session is the last session of the corresponding PoA address, and if so, enters C, otherwise enters step D;

C. ASN-GW FA initiates the MIP de-registration operation of the session corresponding to the first POA;

D. The MIP client will need to terminate the session information for processing, and terminate the session;

E. Repeat step B until the POA addresses corresponding to all session IDs are judged;

F. The ASN-GW FA sends a session termination result message to the ASN-GW DP unit.

The present invention can solve the problem of one or more or all sessions on one tunnel being terminated when multiple sessions are established on one tunnel, and can solve the problem of one or more or all sessions on one or more tunnels being terminated when multiple sessions are established on multiple tunnels process, including the suspension of all sessions on some tunnels and the suspension of some sessions on some tunnels, the solution of the invention is simple and easy to implement.

Description of drawings

FIG. 1 is a schematic diagram of a WiMAX network structure in the prior art;

Fig. 2 is a schematic flow chart of prior art 1;

Fig. 3 is a schematic flow chart of prior art 2;

FIG. 4 is a schematic diagram of the process of initiating MIP de-registration in Embodiment 1 of the present invention;

FIG. 5 is a schematic flow chart of aborting a session in Embodiment 1 of the present invention;

FIG. 6 is a schematic flow chart of aborting a session in Embodiment 2 of the present invention;

FIG. 7 is a schematic flow chart of aborting a session in Embodiment 3 of the present invention;

FIG. 8 is a schematic diagram of the process of initiating MIP de-registration in Embodiment 5 of the present invention;

FIG. 9 is a schematic flow diagram of aborting a session in Embodiment 5 of the present invention;

FIG. 10 is a schematic flow chart of aborting a session according to Embodiment 6 of the present invention.

Detailed ways

The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

The invention proposes a session termination process in the case of supporting MSS multi-session in a wireless access network. When a session is terminated, session resources can be effectively released without affecting other ongoing sessions. For PMIP and CMIP modes, the present invention can have multiple schemes, which are described as follows:

Scheme 1: For the PMIP mode, there may be multiple abort processes, which are described as follows.

Example 1

In PMIP mode, the MIP client agent is in the ASN, and the processing of MIP establishment/release and other request and response messages is transparent to the MSS. The MIP client agent completes all MIP through FA or directly with HA. Initiation and reception of request and response messages such as establishment/release. The switching process in PMIP mode includes the following steps:

S11. First, when ASN-DP triggers session termination, it needs to send the terminated session information to the MIP client agent in the R3_Session_Release.Request message, for example: Session ID, point of attachment address (PoA) in MI, corresponding HA address, MSS ID, etc. Considering that a batch of sessions may be terminated, these session information will be a set of tables including Session ID, PoA address, and HA address.

In the existing technology, the message only contains the MSS ID, which is completely sufficient in the case of a single session, because in the case of a single session, there will only be one PoA address for any MSS, and only need to notify the binding The HA release of the MSS information and the tunnel between ASN-GW, but in the case of MSS multi-session, different sessions may be carried on different tunnels between HA and ASN-GW, and it is also possible that For tunnels between different HAs and the ASN-GW, it is necessary to add a list of session ID, PoA address, and HA address. For each session of the MSS, there is such a triplet. How many need to be terminated? The MSS session will have how many such triples in the message, thus forming a triple table. Therefore, in order to clarify the tunnel to be released, the HA address and PoA address can be carried. At the same time, through the session ID, corresponding session management work can be performed in the ASN-GW, such as suspending the charging for the session, notifying the charging system of the charging information about the session, and so on. And if there is no session ID, it is not clear which session should be terminated, so the session ID also needs to be carried.

In terms of implementation, the acquisition of the above POA address and HA address can store the PoA address and HA address corresponding to a session of a certain MSS on the MIP client agent, so that these can be obtained on the MIP client agent Two pieces of information. Of course, this requires the MIP client agent or ASN-GW FA to store the PoA address corresponding to the MSS ID+session ID and the corresponding table of the HA address.

S12, the MIP client agent first analyzes the PoA address corresponding to the suspension session ID (that is, a corresponding bearer tunnel from FA to HA), whether all the corresponding session IDs are required in the R3_Session_Release.Request message The aborted session ID. If yes, go to step S121, if not, go to step S122.

Since the POA address corresponding to the suspended session ID is definite, but the session ID corresponding to the POA is uncertain, it may be more than the suspended session ID, or may be equal to the suspended session ID. Each PoA address in the message needs to be analyzed in this way, mainly to see how many different PoA addresses there are, and how many S12s there will be in this process. That is to say, the process S12 needs to be repeated many times.

S121. If the PoA address corresponding to the session ID is terminated, and the IDs of all the corresponding sessions are the session IDs that need to be terminated in the R3_Session_Release.Request message, then for the PoA address, according to the prior art 1, the second After the step (except for the R3_Session_Release.Reply message), the MIP client agent or MSS initiates the MIP de-registration process. As shown in Figure 4, it is a schematic diagram of the de-registration process. It can be seen from Figure 4 that it mainly includes the following steps:

S1211. The MIP client agent initiates the MIP de-registration process, sends the PoA address and forwarding address of the MSS to the ASN-GW FA through the MIP Registration Request message, and sets the lifetime to 0 in the message, that is, de-registers.

S1212. The FA forwards the MIP Registration Request to HA1, and notifies HA1 to release the tunnel between FA and HA1 bound to the PoA address of the MSS.

S1213. HA1 sends the MIP de-registration response back to the FA.

S1214. The FA then forwards the message to the MIP client agent. This completes a MIP de-registration process.

S122. If the PoA address corresponding to the session ID is terminated, and the IDs of all the corresponding sessions are not all the session IDs that need to be terminated in the R3_Session_Release.Request message, then only the session information that needs to be terminated is performed on the MIP client. process, and abort the session.

As shown in Figure 5, it is a schematic flow chart of the processing process, as can be seen from the figure, it mainly includes the following steps:

S1221. Update the session table and information corresponding to the MSS in the MIP client proxy, and perform related operations for session termination.

S1222, MSS identification, session identification and other relevant session information (in order to improve processing efficiency, can be one group or one, all corresponding to same PoA, also can have a Session_Release.Request/Reply message for each session, but The efficiency is relatively low) is sent from the MIP client agent to the ASN-GW FA through the session termination application message (Session_Release.Request).

S1223. After the resource release process of the session is performed on the ASN-GW FA, the result of the session termination operation in the ASN-GW FA is returned to the MIP by the ASN-GW FA through a session termination response message (Session_Release.Reply) client proxy.

S13. Step S12 is repeated until the sessions corresponding to all PoA addresses in the message are processed, that is, corresponding session termination processing is performed for all tunnels involved in the session termination message.

S14, after the step S13 is processed, the MIP client agent returns the session termination result message through the session termination response message (R3_Session_Release.Reply, this message has a corresponding processing result for each session ID in the R3_Session_Release.Request message) To the ASN-GW DP unit. This completes the entire session termination process.

Example 2

When multiple sessions are carried on one tunnel, the process of aborting one session (using PMIP mode), as shown in Figure 6, is a schematic flow diagram of the process, which mainly includes the following steps:

S21. When ASN-DP triggers session termination, it needs to send the terminated session information to the MIP client agent in the R3_Session_Release.Request message. The message includes: SessionID, the point of attachment address (PoA) in MIP, and the corresponding HA address, MSS ID and other session information.

S22. After the MIP client agent judges that even after the session is terminated, its PoA also corresponds to other ongoing sessions, then update the session table and information corresponding to the MSS, and perform related operations for session termination;

S23, then MSS identification, session identification and other relevant session information are sent from the MIP client agent to the ASN-GW FA through the session termination application message (Session_Release.Request), and resources for the session are performed on the ASN-GW FA process of release;

S24, the result of the session termination operation in the ASN-GW FA is returned to the MIP client agent by the ASN-GW FA through a session termination response message (Session_Release.Reply);

S25. The MIP client agent returns the session termination result to the ASN-GW DP unit through a session termination response (R3_Session_Release.Reply). This completes the entire session termination process.

The important message formats are defined as: message name message sending direction message carrying information R3_Session_Release.Request ASN-DP＝＞PMIP Client MSS ID, Transaction ID, session ID, PoA@, HA address R3_Session_Release.Reply PMIP Client＝＞ASN-DP MSS ID, session ID, Status (Successful, Failed), [Error Code], Transaction ID

Example 3

Terminate all session processes on a tunnel (using the PMIP mode), as shown in Figure 7, which is a schematic flow chart of the process, mainly including the following steps:

S31. When ASN-DP triggers session termination, it needs to send the terminated session information to the MIP client agent in the R3_Session_Release.Request message. The message includes: SessionID, the point of attachment address (PoA) in MIP, and the corresponding HA address, MSS ID and other session information.

S32, the MIP client agent finds that there is only one PoA address in the session termination message, and all sessions corresponding to the PoA are in the session list that needs to be terminated, then initiates a MIP registration request: Lifetime is set to 0 in the MIP registration request Send it to FA.

S33. The ASN-GW FA forwards the received MIP de-registration request of the MSS to the HA.

S34. The HA releases the tunnel between the FA corresponding to the unbound PoA address required in the registration message and the HA; and sends a de-registration response to the FA.

S35. The FA forwards the de-registration response to the MIP client agent.

S36. After the MIP client agent receives the de-registration response, it initiates a session termination response message (R3_Session_Release.Request) to the ASN-GW DP unit, and provides the MSS identification in the message, (session identification, processing result) binary The group list notifies the ASN-GW DP unit of the requested session termination result.

The important message formats are defined as: message name message sending direction message carrying information R3_Session_Release.Request ASN-DP＝＞PMIP Client MSS ID, Transaction ID, list of (session ID, PoA@, HA address) pair R3_Session_Release.Reply PMIP Client＝＞ASN-DP MSS ID, list of(sessionID, Status(Successful, Failed), [Error Code]) pair, Transaction ID

Example 4

Abort procedure according to Example 1 with the changes made.

This embodiment changes the step S12 of Embodiment 1. In the MIP client agent, first each suspension session is processed sequentially, and it is judged whether the suspension session is the last session of the corresponding PoA address, if it is, it will enter S421, otherwise Proceed to step S422; the rest of the steps can be processed in the same way as in Embodiment 1.

Embodiment 4 specifically comprises the following steps:

S41. When ASN-DP triggers session termination, it needs to send the terminated session information to the MIP client agent in the R3_Session_Release.Request message, for example: Session ID, point of attachment address (PoA) in MIP, corresponding HA Address, MSS ID, etc. Considering that a batch of sessions may be terminated, these session information will be a set of tables including Session ID, PoA address, and HA address.

S42. The MIP client agent processes each suspended session sequentially, and judges whether the suspended session is the last session of the corresponding PoA address. If yes, go to step S421; if not, go to step S422.

S421. For the session ID, according to the method after the second step in the prior art 1 (except the R3_Session_Release.Reply message), the MIP client agent or MSS initiates the MIP de-registration process.

S422. Process the session information that needs to be terminated at the MIP client, and terminate the session.

S43. Step S42 is repeated until all POAs corresponding to session IDs in the message are processed.

S44. After the processing in step S43 is completed, the MIP client agent returns the session termination result message to the ASN-GW DP unit through the session termination response message. This completes the entire session termination process.

Scheme 2: For the PMIP mode, there may be multiple suspension processes, which are described as follows.

In the MIP process, the MIP client is on the MSS, and the MSS completes all MIP establishment/release requests and response message initiation and reception operations through the FA or directly with the HA to establish/release the ASN-GW IP tunnel with HA. For this mode, we call it CMIP.

Example 5

S51. When ASN-DP triggers session termination, it needs to send the terminated session information to the MIP client agent/ASN-GW FA (corresponding to PMIP/CMIP mode respectively) in the R3_Session_Release.Request message, for example: Session ID, The point of attachment address (PoA) in MIP, the corresponding HA address, MSS ID, etc., considering that a batch of sessions may be terminated, these session information will be a set of tables containing Session ID, PoA address, and HA address.

S52. In the ASN-GW FA, first analyze whether the IDs of all the sessions corresponding to the corresponding PoA address in the message (that is, a tunnel from the corresponding FA to the HA) all need to be terminated in the R3_Session_Release.Request message. Session ID. Each PoA address in the message needs to be analyzed in this way, mainly to see how many different PoA addresses there are, and how many S52s there will be in this process. That is to say, the process S52 needs to be repeated many times.

S521, if yes, for this PoA address, the method after the second step in the second technique (except the R3_Session_Release.Reply message), the de-registration process of the MIP is initiated by the MSS, as shown in Figure 8, mainly includes the following steps:

Here you need to modify the content of the FA advertisement message, and you need to set the destination address in the IP header as the PoA address instead of the broadcast or multicast address used in the normal MIP FA advertisement message, so that the MSS can obtain the PoA address that needs to be registered. Set Lifetime to 0 at this time.

Or take another method to notify the MSS that the tunnel corresponding to the relevant PoA address needs to be released through the signaling/message of the R6 interface between the FA and the BS and the air interface management plane message between the BS and the MSS.

S522. The MIP client initiates the MIP de-registration process, sends the PoA address and FA address of the MSS to the ASN-GW FA through the MIP Registration Request message, and sets the lifetime to 0 in the message, that is, de-registers.

S523. The FA forwards the MIP Registration Request to the HA, and notifies the HA to release the tunnel between the FA and the HA bound to the PoA address of the MSS.

S524. The HA sends the MIP de-registration response back to the FA.

S525. After obtaining the MIP de-registration result, the FA forwards the message to the MIP client agent. This completes the de-registration process of a MIP in the CMIP mode.

S522. If not, then only the MIP client/ASN-GW FA (respectively corresponding to the PMIP/CMIP mode) processes the session information that needs to be terminated, and terminates the session. As shown in Figure 9, it mainly includes the following steps:

S5221. Update the session table and information corresponding to the MSS in the ASN-GW FA, and perform related operations for session termination.

S53. Repeat S52 until the sessions corresponding to all PoA addresses in the message are processed, that is, corresponding session termination processing is performed for all tunnels involved in the session termination message.

S54. After the processing in S53 is completed, the ASN-GW FA returns the session termination result to the ASN-GW DP unit through the session termination response message, and the result message includes all processing results that need to terminate the session. This completes the entire session termination process.

Example 6

When multiple sessions are carried on a tunnel, the process of aborting one of the sessions.

S61. When ASN-DP triggers session termination, it needs to send the terminated session information to the MIP client agent in the R3_Session_Release.Request message. The message includes: SessionID, the point of attachment address (PoA) in MIP, and the corresponding HA address, MSS ID and other session information.

S62. In the ASN-GW FA, it is judged that even after the session is terminated, its PoA also corresponds to other ongoing sessions, then update the session table and information corresponding to the MSS, and perform related operations for session termination;

S63. The ASN-GW FA returns the session termination result to the ASN-GW DP unit through a session termination response (R3_Session_Release.Reply). This completes the entire session termination process.

The important message formats are defined as: message name message sending direction message carrying information R3_Session_Release.Request ASN-DP＝＞ASN GW FA MSS ID, Transaction ID, session ID, PoA@, HA address R3_Session_Release.Reply ASN GW FA＝＞ASN-DP MSS ID, session ID, Status (Successful, Failed), [Error Code], Transaction ID

Example 7

In this embodiment, step S62 of Embodiment 6 is modified. In the ASN-GW FA, each suspended session is first processed sequentially to determine whether the suspended session is the last session of the corresponding PoA address. If so, enter S721, otherwise Proceed to step S722; the rest of the steps can be processed in the same way as in Embodiment 6.

Embodiment 7 specifically comprises the following steps:

S71. When ASN-DP triggers session termination, it needs to send the terminated session information to ASN-GW FA in the R3_Session_Release.Request message, for example: Session ID, PoA in MIP, corresponding HA address, MSS ID, etc. , considering that it is possible to terminate a batch of sessions, these session information will be a set of tables including Session ID, PoA address, and HA address.

S72, ASN-GW FA processes each suspended session sequentially, and judges whether the suspended session is the last session of the corresponding PoA address, if yes, enters step S721, if not, enters step S722.

S721. For the session ID, according to the method after the second step in the prior art 2 (except the R3_Session_Release.Reply message), the MIP client agent or the MSS initiates the MIP de-registration process.

S722. The ASN-GW FA processes the session information that needs to be terminated, and terminates the session.

S73. Step S72 is repeated until all POAs corresponding to session IDs in the message are processed.

S74. After the processing in step S73 is completed, the ASN-GW FA returns the session termination result message to the ASN-GW DP unit through the session termination response message. This completes the entire session termination process.

The present invention can solve the problem of the session termination process on one or more or all tunnels when multiple sessions are established on one tunnel, and can solve the problem of session termination on one or more or all tunnels when multiple sessions are established on multiple tunnels process, including the suspension of all sessions on some tunnels and the suspension of some sessions on some tunnels, the solution of the invention is simple and easy to implement.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (21)

1, session stop method in a kind of wireless access network is characterized in that, may further comprise the steps:

A, ANS-DP triggering session are ended flow process, will end session information and send to mobile IP (MIP) Client Agent, and described session information comprises the termination session id;

B, MIP Client Agent are handled successively according to the termination session id in the termination information, if after discharging first session id, the pairing PoA of first session id address also has other corresponding sessions, then enters step D, otherwise enters step C;

C, MIP Client Agent are initiated first MIP that ends session and are gone the registration operation;

First session information that D, MIP Client Agent will need to end is handled, and ends this first session;

E, repeating step B need end session id until all and judge and finish;

F, MIP Client Agent send the session stop results messages to ASN-GW DP unit.

2 the method for claim 1 is characterized in that in the described termination session information, also carry to end session attachment point (POA) address and/or end session home agent (HA) address.

3, method as claimed in claim 2 is characterized in that, in the described steps A, described termination session information also comprises the pairing session id in POA address of described termination session id correspondence, among the described step B, described other sessions are taken at described termination session information.

4, the method for claim 1 is characterized in that described MIP Client Agent stores termination session attachment point (POA) address and/or ends session home agent (HA) address.

5, the method for claim 1 is characterized in that, the MIP Client Agent stores the pairing session id in POA address of described termination session id correspondence, and among the described step B, described other sessions are taken at described MIP Client Agent.

6, the method for claim 1 is characterized in that, described step C comprises:

C1, MIP Client Agent initiate MIP and go registration, and to ASN-GW FA, in described message, sign-on ID is removed in setting by forwards for POA address that will (mobile subscriber station) MSS and HA address;

To HA, notice HA discharges this fixed tunnel of POA address nation with described forwards for C2, ASN-GWFA;

C3, HA send MIP through ASN-GW FA to the MIP Client Agent and go the registration response.

7, the method for claim 1 is characterized in that described step D comprises:

D1, in the MIP Client Agent, upgrade the conversational list and the session information of described MSS correspondence, and carry out the conversation end operation;

D2, the termination session information of will being correlated with are sent to ASN-GW FA from the MIP Client Agent, at ASN-GW FA this Session Resources are discharged;

D3, ASN-GW FA send to the MIP Client Agent with session hang up object information.

8, method as claimed in claim 7 is characterized in that among the described step D3, in the described operation result information, comprises the result that all need end session.

9, the method for claim 1 is characterized in that in the described step F, in the described session stop results messages, comprises the result that all need end session.

10, session stop method in a kind of wireless access network is characterized in that, may further comprise the steps:

A, ANS-DP triggering session are ended flow process, will end session information and send to the MIP Client Agent, and described session information comprises the termination session id;

B, MIP Client Agent are ended session for each and are handled successively, judge that whether this termination session is last session of the PoA address of correspondence, if just enter C, otherwise enters step D;

The MIP that C, MIP Client Agent are initiated a POA respective session goes the registration operation;

D, will need to end session information in the MIP client and handle, and end described session;

E, repeating step B judge until the POA address of all session id correspondences and to finish;

F, MIP Client Agent send the session stop results messages to ASN-GW DP unit.

11, session stop method in a kind of wireless access network is characterized in that, may further comprise the steps:

A, access service network decision point (ANS-DP) triggering session are ended flow process, will end session information and send to (access service network gateway external agent) ASN-GW FA unit, and described session information comprises the termination session id;

B, ASN-GW FA unit obtain first session id of a POA address correspondence, and judge whether first session id is contained in described termination session id, if enter step C, if not, enter step D;

The MIP that a POA respective session is initiated in C, MSS unit goes the registration operation;

D, will need to end session information in ASN-GW FA unit and handle, and end this session;

E, repeating step B judge until the session id of all POA correspondences and to finish;

F, ASN-GW FA send the session stop results messages to ASN-GW DP unit.

12, method as claimed in claim 11 is characterized in that, in the described steps A, described termination conversation message also comprises first session id of a described POA address correspondence, among the described step B, described first session id is taken at described termination conversation message.

13, method as claimed in claim 12 is characterized in that, first conversation message of a described POA address correspondence is stored in ASN-GW DP, and among the described step B, described first session id is taken at described ASN-GW DP.

14, method as claimed in claim 11 is characterized in that described step C comprises:

C1, ASN-GW FA send external agent (FA) advertisement information to MSS, and notice MSS needs the tunnel of this PoA address correspondence is discharged;

C2, MIP client are initiated MIP and are gone registration process, and by going to the PoA address of registration message with MSS, forwarding address is dealt on the ASN-GW FA, are provided with in this message and remove sign-on ID;

C3, FA go registration message to be transmitted to HA this, and notice HA discharges the FA of PoA address binding of this MSS to the tunnel between the HA;

C4, HA go registration reply message to send to the MIP Client Agent through FA MIP.

15, method as claimed in claim 14 is characterized in that among the described step C1, sends the FA advertisement information by ASN-GW FA to MSS and finishes notice.

16, method as claimed in claim 15 is characterized in that among the described step C1, in the described FA advertisement information, with the registration of going of the PoA address of FA advertisement information notice MSS correspondence.

17, method as claimed in claim 15 is characterized in that in the described FA advertisement information, the destination address in the described IP head is set to the PoA address.

18, method as claimed in claim 14 is characterized in that among the described step C1, ASN-GWFA by and BS between the R6 interface on signaling/message and the air interface management face message between BS and the MSS finish notice.

19, method as claimed in claim 10 is characterized in that described step D comprises:

D1, in ASN-GW FA, upgrade the conversational list and the information of this MSS correspondence, and carry out the operation of conversation end.

20, method as claimed in claim 10 is characterized in that in the described step F, in the described results messages, comprises the result that all need end session.

21, session stop method in a kind of wireless access network is characterized in that, may further comprise the steps:

A, ANS-DP triggering session are ended flow process, will end session information and send to the MIP Client Agent, and described session information comprises the termination session id;

B, ASN-GW FA end session for each and handle successively, judge that whether this termination session is last session of the PoA address of correspondence, if just enter C, otherwise enters step D;

The MIP that C, ASN-GW FA initiate a POA respective session goes the registration operation;

D, will need to end session information in the MIP client and handle, and end described session;

E, repeating step B judge until the POA address of all session id correspondences and to finish;

F, ASN-GWFA send the session stop results messages to ASN-GW DP unit.

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