WO2009024074A1 - A method of user device detachment - Google Patents

Abstract

A method for user device detachment is used to the detachment of user device under the limiting signaling. Said method comprises: triggering the detachment operation of the first network accessing control entity, and the type of said detachment operation is the combining detachment operation; the first network accessing control entity implements the corresponding detachment operation according to the type of said detachment operation and triggers the combining detachment operation of the second network accessing control entity; the second network accessing control entity implements the corresponding detachment operation according to the triggering of the first network accessing control entity. It is implemented that UE notifies another network accessing control entity in various ways after UE detaches from a registered network accessing control entity so that another network accessing control entity carries out the following process operation.

Description

 Method for detaching user equipment

 This application is filed on August 20, 2007 and submitted to the China Patent Office, application number 200710142033.X, and the invention name is "a method for attaching user equipment"; and submitted to the Chinese Patent Office on October 24, 2007, application The priority of the Chinese Patent Application No. 200710182045.5, entitled "A method of detaching a user equipment" is incorporated herein by reference.

Technical field

 The present invention relates to the field of wireless communications, and in particular, to a method for detaching user equipment.

Background technique

 The Universal Mobile Telecommunication System (UMTS) is a third-generation wireless communication network technology standard defined by the Third Generation Partnership Project (3GPP). The UMTS network consists of a core network including a circuit switched domain (CS, Circuit Switched) and a packet switched domain (PS, Packet Switched), a circuit switched domain providing circuit switched based services, and a packet switched domain providing packet based Exchange of business. The terminal used by the mobile user is UE (User Equipment).

 The PS domain of the core network is composed of a Serving GPRS Support Node (SGSN), a Gateway GPRS Support Node (GGSN), and a Home Location Register (HLR). The access network consists of a wireless network. The controller and the base station are composed. Each radio network controller is connected to a plurality of base stations, each SGSN is connected to a plurality of RNCs, the SGSN is connected through Iu, and the SGSN and the General Packet Radio Service (GPRS, General Packet Radio Service) are respectively connected to the HLR.

 Currently, in 3GPP, various vendors are actively studying the Long Term Evolution (LTE Long Term Evolved) / System Architecture Evolved (SAE) system. The purpose of LTE is to provide a method for reducing delay, increasing user data rate, and improving The system capacity and coverage of the low-cost network, using PS domain services, but the bearer network is IP.

 The following describes the SAE evolution network architecture and its functions. In the evolved packet core network: The function of the Mobility Management Entity (MME) is to save the mobility management context of the UE, for example, the identity of the user, mobility. Management status, location information, etc.

The SAE gateway consists of two parts, namely the service gateway (S-GW, Serving Gateway) and the number of packets. According to the network gateway (P-GW, PDN Gateway). The S-GW and the P-GW are two logical entities and may exist on the same or different physical entities.

 The user plane context of the UE is saved on the S-GW, for example, the IP address and routing information of the UE, and the lawful interception, packet data routing function, and the like are performed. The interface between the S-W and the MME is S11, and the mobility management information of the UE interacts with the session control information.

 The MME is responsible for the connection between the control plane and the user plane through the Sl-MME and the S-GW through the S1-U and the access network of the evolved network. At the same time, the MME connects to the 2G/3G SGSN through the S3 interface through the S3 interface and the S-GW, and is responsible for the mobility control plane anchor and user plane anchor function between the 2G/3G and SAE networks respectively.

 The P-GW is responsible for the user plane anchor function of the UE accessing the packet data network, communicates with the external packet data network through the SGi reference point, has the function of packet routing and forwarding, and is responsible for the policy charging enhancement function, based on each user. Group filtering function, etc. The P-GW is connected to the S-GW through the S5 interface, and transmits control information such as bearer establishment/modification/deletion, and packet data routing.

 The Policy and Charging Rules Function (PCRF) transmits QoS and accounting policy control information to the P-GW through the S7 interface.

 Different radio access technologies between the SAE and the 2G/3G network (RAT, Radio Access frequent network registration process is a great waste to the air interface. As shown in Figure 1, RA1 and RA2 are existing 2G/3G. The routing area (RA, Routing Area), the existing 2G/3G UE initiates the routing area update (RAU, Routing Area Update) process every time the RA is replaced. TA1, TA2, TA3, TA4 are the tracking of the evolved network. Tracking Area (RA of 2G/3G) When a multimode UE moves in these areas, if there is no mechanism, it will lead to frequent network registration process. For example, the UE enters RA1 and registers with the SGSN of 2G/3G. When the UE enters TA1, it registers with the MME of the evolved network. When the UE moves out of TA1 and enters RA1, it registers with the SGSN of the 2G/3G. The purpose of registration is to enable the network to page to the UE in a certain RAT, but Because the frequent registration of mobile brings a lot of registration signaling overhead.

The limitation signaling problem is proposed to solve the problem that a large amount of registration signaling overhead is brought about by the frequent registration of the mobile. After the UE is attached, it is registered to an access network (2G/3G network or an evolved network), and then the UE moves to another connection. After entering the network, registering to another access network, the UE simultaneously registers with the two access systems. After that, the UE does not need to initiate any registration process to move in the corresponding registration area (RA or TA) of the two networks. The UE only needs to initiate a normal RAU process when replacing the RA or TA.

 In the existing restricted signaling technology, the UE registers to both systems simultaneously. However, both systems can be registered in the Home Subscriber Server (HSS), that is, dual registration (both SGSN and MME are registered in the HSS); or only one system can be registered to the HSS, that is, single registration ( The SGSN or MME registers with the HSS). Regardless of single registration or dual registration, the SGSN/MME that generates the restriction signaling association records the information corresponding to the associated entity MME/SGSN. Summary of the invention

 The embodiment of the invention provides a method for detaching a user equipment. After the UE detaches in one system, it notifies another system or triggers detachment of another system.

 An embodiment of the present invention provides a method for detaching a user equipment, including:

 And triggering a detach operation of the first network access control entity, where the type of the detach operation is a joint detach operation; and the first network access control entity performs a corresponding detach operation according to the type of the detach operation. And triggering a joint detach operation of the second network access control entity; and the second network access control entity performs a corresponding detach operation according to the trigger of the first network access control entity.

 An embodiment of the present invention provides another method for detaching a user equipment, including:

 And triggering a detach operation of the first network access control entity, where the type of the detach operation is a single system detach operation; and the first network access control entity performs a corresponding detach operation according to the type of the detach operation The first network access control entity notifies the second network access control entity that the corresponding detach operation has been performed.

 The embodiment of the invention provides another method for detaching user equipment, including:

 The first network access control entity triggers a detach operation of the second network access control entity, the type of the detach operation is a single system detach operation; and the second network access control entity is configured according to the detach operation The type performs the corresponding detach operation.

 The embodiment of the invention further provides a method for detaching a user equipment, including:

And triggering a detach operation of the first network access control entity, where the type of the detach operation is a single system detach operation; and the first network access control entity performs a corresponding detach operation according to the type of the detach operation The first network control entity notifies the HSS to set the first network control entity To clear the status.

DRAWINGS

 1 is a schematic diagram of a network structure in which a different RAT exists in the prior art in the prior art; FIG. 2 is a first embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 3 is a second embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 4 is a third embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 FIG. 5 is a fourth embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 6 is a fifth embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 7 is a sixth embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 8 is a seventh embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 FIG. 9 is a eighth embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 FIG. 10 is a ninth embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 11 is a tenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention;

 FIG. 12 is a schematic diagram of a method for detaching a user equipment according to an embodiment of the present invention;

 FIG. 13 is a thirteenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention; FIG. 14 is a thirteenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention; 16 is a method for detaching a user equipment according to an embodiment of the present invention; FIG. 17 is a fifteenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention; FIG. 18 is a seventh embodiment of a method for detaching a user equipment according to an embodiment of the present invention; FIG. 19 is a thirteenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention; FIG. FIG. 21 is a second embodiment of a method for detaching a user equipment according to an embodiment of the present invention; FIG. 22 is a second embodiment of a method for detaching a user equipment according to an embodiment of the present invention; FIG. 23 is a twenty-second embodiment of a method for detaching a user equipment according to an embodiment of the present invention.

detailed description

In the prior art, the UE, the SGSN/MME, and the HSS may initiate a detach operation of the user equipment. However, the prior art does not involve the process of de-attaching the user equipment under the signaling, and only considers the case where the system is detached, without triggering the detachment of another system or notifying another system. The detachment of the user equipment is completed in the system. For example, after the UE is detached in the SGSN, the MME is not notified that the MME has been detached. In the subsequent process, the MME does not know that the MME has been detached, and the MME still associates the SGSN that has been detached. Cause unnecessary operational process errors.

 The embodiment of the invention provides a method for detaching a user equipment, which is used to limit detachment of user equipment under signaling.

 In the embodiment of the present invention, the MME is used as the first network control entity, and the SGSN is used as the second network control entity as an example to describe the process of detaching the user equipment. At the same time, the MME can also serve as the second network control entity, and the SGSN can also serve as the first network control entity. It should be noted that, after the restriction signaling is activated, the HSS may register the entity information of the two systems, that is, the HSS may simultaneously record the information of the SGSN and the MME registered by the UE, that is, the dual registration; and the single registration refers to the restriction signaling activation. The HSS registers only one entity information of the system (for example, the HSS records only the information of the entity that the UE last initiated the update), and the entity information of other systems registered by the UE is stored in another system entity. For example, if the UE first registers with the 2G/3G, the HSS records the SGSN information registered by the UE (the location update message is sent to the HSS through the SGSN). When the UE moves to another RAT SAE system and initiates a location update, the UE registers again. In the MME of the SAE system, the signaling is activated. In this case, the MME sends a location update to the HSS. The HSS records the information of the MME and deletes the information of the SGSN, and the information of the SGSN is stored in the MME. That is, both the SGSN and the MME record the information of the UE, but the HS S retains only one entity information of the system.

 The process of detaching user equipment in various network situations under restricted signaling is described below with reference to the accompanying drawings. Referring to FIG. 2, it is a first embodiment of a method for detaching a user equipment according to an embodiment of the present invention.

 In this embodiment, in the case of dual registration, the UE initiates joint de-attachment within LTE.

 Step 11: The UE sends a detach request message to the MME, and carries a joint detachment indication. Step 12: After receiving the joint detach request, the MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all session management ( SM, Session Management ) context;

 After the S-GW deletes all the SM contexts, step 13 is performed. In this step, the MME sends the delete bearer request to the S-GW without the indication, and the S-GW only deletes the SM context associated with the SAE.

 Step 13: The S-GW sends a bearer deletion request to the P-GW.

The P-GW deletes all bearer information about the UE. Step 14: The MME sends a detachment indication message to the SGSN, and carries a joint detachment request. The detachment indication message may include a cause value indicating that the SGSN does not initiate bearer deletion to the S-GW. Corresponding to step 12, if the MME sends a delete bearer request to the S-GW without an indication, the detachment indication message may not include the bearer deletion cause value indicating that the SGSN does not initiate the S-GW, and step 14a is performed. If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 14a: The SGSN sends a bearer deletion request message to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value, and the S-GW does not need to initiate the P-GW. The bearer is deleted, and the S-GW returns a delete bearer response message to the SGSN.

 Step 15: The SGSN returns a detach indication indication acknowledgement message to the MME.

 Step 16. The P-GW returns a bearer deletion response to the S-GW.

 Step 17. The P-GW and the PCRF perform signaling interaction.

 Step 17 will be executed in some cases, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 18: The S-GW returns a delete bearer response to the MME.

 Step 19: The MME returns a detach accept message to the UE.

 This step is performed in a state where the detach type is not the UE being turned off.

 Step 110: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

 The principle of the joint detachment initiated by the UE in the 2G/3G network is the same as the above-mentioned process, except that the execution subject changes accordingly, and details are not described herein again.

 Referring to FIG. 3, it is a second embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, in the case of dual registration, the MME initiates a joint detach request.

 Step 21: The MME sends a detach request to the UE, and carries a joint detachment indication. Step 22: The MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all

SM context;

 In this step, the MME sends a delete bearer request to the S-GW without an indication, and the S-GW only deletes the SM context related to the SAE.

 Step 23: The bearer initiated by the S-GW to the P-GW is deleted.

Step 24: The MME sends a detach indication to the SGSN, and carries a joint detach request. The detachment indication message may include a cause value indicating that the SGSN does not initiate the bearer deletion to the S-GW; corresponding to the step 22, if the MME sends the delete bearer request to the S-GW without an indication, the detach indication message is also The cause value indicating that the SGSN does not initiate bearer deletion to the S-GW may not be included. In this case, the SGSN is required to initiate bearer deletion to the S-GW in step 24a.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 24a: The SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value, and the S-GW does not initiate the bearer to the P-GW. Delete, the S-GW returns a delete bearer response message to the SGSN.

 Step 25: The SGSN returns a detach indication indication acknowledgement message to the MME.

 Step 26: The P-GW returns a bearer deletion response to the S-GW.

 Step 27: The P-GW and the PCRF perform signaling interaction;

 Step 27 will be executed under certain circumstances, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 28: The S-GW returns a delete bearer response to the MME.

 Step 29: The UE returns a detach accept message to the MME.

 Step 210: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

 The second embodiment differs from the first embodiment in that detachment is triggered by the MME. The SGSN triggering the detach procedure is the same as that of the foregoing process. The only difference is that the MME performs the action by the SGSN, and the SGSN performs the action by the MME, and details are not described herein.

 Referring to FIG. 4, it is a third embodiment of a method for detaching a user equipment according to an embodiment of the present invention.

 This embodiment is a joint detachment triggered by the HSS in the case of dual registration.

 Step 31: The HSS sends a delete location message to the MME, and indicates that the joint location is deleted. Step 32: After receiving the delete location message of the HSS, the MME sends a detach request to the UE. Step 33: The MME sends the delete bearer to the S-GW. Requesting, and instructing the S-GW to delete all SM contexts;

 In this step, the MME sends a delete bearer request to the S-GW without an indication, and the S-GW only deletes the SM context related to the SAE.

Step 34: The MME sends a detach indication message to the SGSN, and carries a joint detach request. Certain parameters may also be carried in the detachment indication message to inform the SGSN that the detachment is initiated by the HSS.

 The detachment indication message may include a cause value indicating that the SGSN does not initiate the bearer deletion to the S-GW; in the corresponding step 33, if the MME sends the delete bearer request to the S-GW without an indication, the detach indication message is also The reason value indicating that the SGSN does not initiate bearer deletion to the S-GW may not be included, in which case step 34a is performed.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 In the step 34a, the SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value, and the S-GW does not need to initiate the bearer to the P-GW. Delete, the S-GW returns a delete bearer response message to the SGSN.

 Step 35: The S-GW initiates a bearer deletion to the P-GW.

 Step 36: The SGSN returns a detach indication indication confirmation message to the MME.

 Step 37: The P-GW returns a bearer deletion response to the S-GW.

 Step 38: The P-GW and the PCRF perform signaling interaction;

 Step 38 will be performed under certain circumstances, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 39: The S-GW returns a delete bearer response to the MME.

 Step 310: The UE returns a detach accept message to the MME.

 Step 311: The MME returns a delete location confirmation message to the HSS.

 Step 312: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

 This embodiment differs from the second embodiment in that detachment is triggered by the HSS.

 Referring to FIG. 5, it is a fourth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, in the case of a single registration, the MME registers with the HSS, and the UE detaches the joint triggered within the LTE.

 Step 41: The UE sends a detach request message to the MME, and carries a joint detachment indication. Step 42: After receiving the joint detach request, the MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all the SM contexts.

Step 43: The S-GW initiates bearer deletion to the P-GW. Step 44: The MME sends a detachment indication to the SGSN, and carries a joint detach request, which may include a cause value indicating that the SGSN does not initiate bearer deletion to the S-GW.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 45: The SGSN deletes the MM context associated with the UE, and returns a detach indication indication acknowledgement message to the MME.

 Step 46: The P-GW returns a bearer deletion response to the S-GW.

 Step 47: The P-GW and the PCRF perform signaling interaction;

 Step 47 will be executed under certain circumstances, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 48: The S-GW returns a delete bearer response to the MME.

 Step 49: The MME returns a detach accept message to the UE.

 This step is performed in a state where the detach type is not the UE being turned off.

 Step 410: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

 In the step 42 of the embodiment, the MME may send the delete bearer request to the S-GW without the indication, and the S-GW only deletes the SM context related to the SAE, and the corresponding step 44 message does not include the indication that the SGSN does not need to be initiated. The S-GW carries the deletion cause value, and the SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value; If the cause value is not included, the S-GW determines that the bearer deletion to the P-GW is not initiated. The S-GW returns a delete bearer response message to the SGSN. This embodiment differs from the third embodiment in that the UE de-attaches the single-system registration (MME single-system registration to the HSS) initiated by the UE to the MME. The principle of the joint de-attachment (SGSN single-system registration to the HSS) initiated by the UE in the 2G/3G network is the same as the above-mentioned process, except that the execution subject changes accordingly, and will not be described here.

 Referring to FIG. 6, FIG. 6 is a fifth embodiment of a method for detaching a user equipment according to an embodiment of the present invention.

 This embodiment is another embodiment in which the MME registers with the HSS and the UE initiates joint de-attachment within LTE under single system registration.

Step 51: The UE sends a detach request message to the MME, and sends a detachment request to the MME. Step 52: After receiving the joint detach request, the MME sends a delete bearer request to the S-GW, and Instructing the S-GW to delete all SM contexts;

 Step 53: The S-GW initiates a bearer deletion to the P-GW.

 Step 54: The MME sends a detachment indication to the SGSN, and carries a joint detach request, and may include a cause value indicating that the SGSN does not initiate bearer deletion to the S-GW.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 55: The P-GW returns a bearer deletion response to the S-GW.

 Step 56: The P-GW and the PCRF perform signaling interaction;

 Step 56 will be executed in some cases, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted;

 Step 57: The SGSN returns a detach confirmation to the MME.

 Step 58: The S-GW returns a delete bearer response to the MME.

 Step 59: The SGSN sends a location update message to the HSS.

 Step 510: The HSS and the MME perform location deletion.

 The HSS deletes the registered MME information, and the MME deletes the MM context associated with the UE.

 Step 511: The HSS sends an update location confirmation to the SGSN.

 Step 512: The UE returns a detach accept message to the MME.

 Step 513: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

 In the step 52 of the embodiment, the MME may send the deleted bearer request to the S-GW without the indication, and the S-GW only deletes the SM context related to the SAE, and the corresponding step 54 message does not include the indication that the SGSN does not need to initiate. The S-GW carries the deletion cause value, and the SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value; If the reason value is not included, the S-GW itself determines that the bearer deletion to the P-GW is not initiated. The S-GW returns a delete bearer response message to the SGSN. This embodiment differs from the fourth embodiment in that the SGSN is added to the location of the HSS and the new HSS and the MME are deleted. The principle of the joint de-attachment (the SGSN single-system registration to the HSS) initiated by the UE in the 2G/3G network is the same as the above-mentioned process, except that the execution subject changes accordingly, and details are not described herein again.

Referring to FIG. 7, FIG. 7 is a sixth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, in the case of single system registration, the SGSN registers with the HSS, and the UE initiates joint detachment within LTE.

 Step 61: The UE sends a detach request message to the MME, and carries a joint detachment indication. Step 62: After receiving the joint detach request, the MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all the SM contexts.

 Step 63: The S-GW initiates a bearer deletion to the P-GW.

 Step 64: The MME deletes the stored MM context related to the UE, and sends a detach indication to the SGSN to carry the joint detach request, and may include a cause value indicating that the SGSN does not initiate bearer deletion to the S-GW.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 65: The SGSN returns a detach indication confirmation message to the MME.

 Step 66: The P-GW returns a bearer deletion response to the S-GW.

 Step 67: The P-GW and the PCRF perform signaling interaction;

 Step 67 will be executed under certain circumstances, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 68: The S-GW returns a delete bearer response to the MME.

 Step 69: The MME returns a detach accept message to the UE.

 Step 610: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

 In the step 62 of the embodiment, the MME sends the delete bearer request to the S-GW without the indication, and the S-GW only deletes the SM context related to the SAE, and the corresponding step 64 message does not include the indication that the SGSN does not need to be initiated. The S-GW carries the deletion cause value, and the SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value; If the reason value is not included, the S-GW itself determines that the bearer deletion to the P-GW is not initiated. The S-GW returns a delete bearer response message to the SGSN. The principle of the joint detachment (MME single system registration to the HSS) initiated by the UE in the 2G/3G network is the same as the above process, but the corresponding change occurs in the execution subject, and details are not described herein. .

Referring to FIG. 8, FIG. 8 is a seventh embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, in the case of single system registration, the SGSN is registered to the HSS, and the UE is initiated in the LTE. Another embodiment is joined in conjunction.

 Step 71: The UE sends a detach request message to the MME, and carries a joint detachment indication. Step 72: After receiving the joint detach request, the MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all the SM contexts.

 Step 73: The S-GW initiates bearer deletion to the P-GW.

 Step 74: The MME sends a detach indication to the SGSN to carry the joint detach request, and may include a cause value indicating that the SGSN does not initiate bearer deletion to the S-GW.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 75: The P-GW returns a bearer deletion response to the S-GW.

 Step 76: The P-GW and the PCRF perform signaling interaction.

 Step 76 will be executed in some cases, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 77: The SGSN returns a detach confirmation to the MME.

 Step 78: The S-GW returns a delete bearer response to the MME.

 Step 79: The MME sends a location update message to the HSS.

 Step 710: The HSS and the SGSN perform location deletion.

 The HSS deletes the registration information about the SGSN, and the SGSN deletes the MM context about the UE. Step 711: The HSS sends an update location confirmation to the MME.

 Step 712: The MME returns a detach accept message to the UE.

 Step 713: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

In step 72 of the embodiment, the MME may send the delete bearer request to the S-GW without the indication, and the S-GW only deletes the SM context related to the SAE, and the corresponding step 74 message does not include the indication that the SGSN does not need to initiate. The S-GW carries the deletion cause value, and the SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value; If the reason value is not included, the S-GW itself determines that the bearer deletion to the P-GW is not initiated. The S-GW returns a delete bearer response message to the SGSN. The principle of the joint detachment (MME single system registration to the HSS) initiated by the UE in the 2G/3G network is the same as the above process, except that the execution subject changes accordingly, and will not be described again. This embodiment and the sixth embodiment The difference is that the MME to HSS location update step is added.

 Referring to FIG. 9, FIG. 9 is a eighth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. This embodiment is a joint detachment initiated by the MME in the LTE when the MME registers with the HSS in the case of single system registration.

 Step 81: The MME sends a detach request to the UE, and carries a joint detachment indication.

 Step 82: The MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all the

SM context;

 Step 83: The S-GW initiates bearer deletion to the P-GW.

 Step 84: The MME sends a detachment indication to the SGSN, and carries a joint detach request, and includes a cause value indicating that the SGSN does not initiate bearer deletion to the S-GW.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 85: The SGSN deletes the MM context, and returns a detach indication confirmation message to the MME. Step 86: The P-GW returns a bearer deletion response to the S-GW.

 Step 87: The P-GW and the PCRF perform signaling interaction.

 Step 87 will be executed under certain circumstances, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 88: The S-GW returns a delete bearer response to the MME.

 Step 89: The UE returns a detach accept message to the MME.

 Step 810: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

In the step 82 of the embodiment, the MME may send the deleted bearer request to the S-GW without the indication, and the S-GW only deletes the SM context related to the SAE, and the corresponding step 84 message does not include the indication that the SGSN does not need to initiate the The S-GW carries the deletion cause value, and the SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value if the bearer deletion request is included. If the reason value is not included, the S-GW itself determines that the bearer deletion to the P-GW is not initiated. The S-GW returns a delete bearer response message to the SGSN. The principle of the joint detachment initiated by the SGSN (the SGSN single system is registered to the HSS) is the same as the above process, except that the execution subject changes accordingly, and will not be described again. The difference between this embodiment and the second embodiment is that, since the SGSN is not registered in the HSS, the SGSN deletes the UE-related MM context together. The second embodiment of the SGSN deletes only the UE-related SM context. The difference between this embodiment and the fourth embodiment is that the detaching entity is triggered to be detached by the UE in the fourth embodiment. In this embodiment, the MME triggers detachment.

 Referring to FIG. 10, it is a ninth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, in the case of single system registration, the MME registers with the HSS, another embodiment of the joint detachment initiated by the MME within LTE.

 Step 91: The MME sends a detach request to the UE, and carries a joint detachment indication. Step 92: The MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all the

SM context;

 Step 93: The S-GW initiates a bearer deletion to the P-GW.

 Step 94: The MME sends a detach indication to the SGSN to carry the joint detach request, and may include a cause value indicating that the SGSN does not initiate bearer deletion to the S-GW.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 95: The P-GW returns a bearer deletion response to the S-GW.

 Step 96: The P-GW and the PCRF perform signaling interaction;

 Step 96 will be executed under certain circumstances, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 97: The SGSN returns a detach confirmation to the MME.

 Step 98: The S-GW returns a delete bearer response to the MME.

 Step 99: The SGSN determines that it is not registered to the HSS, and sends a location update message to the HSS. Step 910: The HSS and the MME perform location deletion.

 The HSS deletes the registration information about the MME, and the MME deletes the MM context associated with the UE. Step 911: The HSS sends an update location confirmation to the SGSN.

 Step 912: The UE returns a detach accept message to the MME.

 Step 913: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

In step 92 of the embodiment, the MME may send the delete bearer request to the S-GW without the indication, and the S-GW only deletes the SM context related to the SAE, and the corresponding step 94 message does not include the indication that the SGSN does not need to initiate. The S-GW carries the cause value of the deletion, and the SGSN sends the value to the S-GW. The deletion request may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value; if the bearer deletion request does not carry the cause value, the S-GW itself determines not to initiate The bearer to the P-GW is deleted. The S-GW returns a delete bearer response message to the SGSN. The principle of the joint detachment initiated by the SGSN (the SGSN single system is registered to the HSS) is the same as the above process, except that the execution subject changes accordingly, and will not be described again. The difference between the embodiment and the eighth embodiment is that the SGSN to the HSS location update step is added. The difference from the fifth embodiment is that the embodiment is triggered by the MME to be detached, and the fifth embodiment is triggered by the UE to detach.

 Referring to FIG. 11, FIG. 11 is a tenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, in the case of single system registration, the SGSN registers with the HSS, and the MME initiates joint detachment within LTE.

 Step 101: The MME sends a detach request to the UE, and carries a joint detachment indication. Step 102: The MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all the SM contexts.

 Step 103: The S-GW initiates a bearer deletion to the P-GW.

 Step 104: The MME deletes the stored MM context related to the UE, and sends a detach indication to the SGSN to carry the joint detach request, and may include a cause value indicating that the SGSN does not initiate bearer deletion to the S-GW.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 105, the SGSN returns a detach indication confirmation message to the MME;

 Step 106: The P-GW returns a bearer deletion response to the S-GW.

 Step 107: The P-GW and the PCRF perform signaling interaction.

 Step 107 will be performed under certain circumstances, and the P-GW can notify the PCRF that all the bearers that need to be deleted have been deleted.

 Step 108: The S-GW returns a delete bearer response to the MME.

 Step 109: The UE returns a detach accept message to the MME.

 Step 1010: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

In the step 102 of the embodiment, the MME sends the delete bearer request to the S-GW without the indication, and the S-GW only deletes the SM context related to the SAE, and the corresponding step 104 message is used. The SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the reason. If the cause value is not included in the bearer deletion request, the S-GW itself determines that the bearer deletion to the P-GW is not initiated. The S-GW returns a delete bearer response message to the SGSN. The principle of the joint detachment initiated by the SGSN (the MME single system is registered to the HSS) is the same as the above process, except that the execution subject changes accordingly, and will not be described again. The difference between this embodiment and the sixth embodiment is that the MME initiates the detach request, and the sixth embodiment initiates the detach request by the UE.

 Referring to FIG. 12, it is an eleventh embodiment of a method for detaching a user equipment according to an embodiment of the present invention. This embodiment is another embodiment in which the SGSN registers with the HSS under the single system registration, and the MME initiates a joint detachment within the LTE.

 Step 1101: The MME sends a detach request to the UE, and carries a joint detachment indication. Step 1102: The MME sends a delete bearer request to the S-GW, and instructs the S-GW to delete all SM contexts.

 Step 1103: The S-GW initiates a bearer deletion to the P-GW.

 Step 1104: The MME sends a detachment indication to the SGSN, and carries the joint detach request, and may include the cause value to indicate that the SGSN does not initiate the bearer deletion to the S-GW.

 If the SGSN has an Iu connection to the UE, the Iu connection is released.

 Step 1105: The P-GW returns a bearer deletion response to the S-GW.

 Step 1106: The P-GW and the PCRF perform signaling interaction.

 Step 1106 is performed in some cases, and the P-GW can notify the PCRF that all bearers that need to be deleted have been deleted.

 Step 1107: The SGSN returns a detach confirmation to the MME.

 Step 1108: The S-GW returns a delete bearer response to the MME.

 Step 1109: The MME sends a location update message to the HSS.

 Step 1110: The HSS and the SGSN perform location deletion.

 The HSS deletes the registration information about the SGSN, and the SGSN deletes the MM context about the UE. Step 1111: The HSS sends an update location confirmation to the MME.

 Step 1112: The UE returns a detach accept message to the MME.

Step 1113: Release the signaling connection. The signaling connection between the UE and the base station, the base station and the UI is released.

 In the step 1102 of the embodiment, the S-GW may only delete the SM context related to the SAE, and the corresponding step 1104 does not include the indication that the SGSN does not need to initiate to the delete bearer request sent by the S-GW. The S-GW carries the deletion cause value, and the SGSN sends a bearer deletion request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not include the cause value; If the reason value is not included, the S-GW itself determines that the bearer deletion to the P-GW is not initiated. The S-GW returns a delete bearer response message to the SGSN. The principle of the joint detachment initiated by the SGSN (MME single system registration to HSS) is the same as the above process, except that the execution subject changes accordingly, and will not be described again. The difference between this embodiment and the seventh embodiment is that the eNB performs a detach request by the UE, which is different from the tenth embodiment in that the MME to HSS location update step is added.

 Referring to FIG. 13, FIG. 13 is a schematic diagram of Embodiment 12 of a method for detaching a user equipment according to an embodiment of the present invention. This embodiment is a single system detachment initiated by the UE in 2G/3G in the case of dual registration, and only the attachment to the SGSN is removed.

 Step 1201: The UE sends a detach request message to the SGSN, indicating that the detach type is only attached to 2G/3G.

 Step 1202: After receiving the detach request, the SGSN sends a request to delete the PDP context to the S-GW, which may include the cause value indicating that the S-GW does not need to initiate the bearer deletion to the P-GW, and may not carry the cause value, S-GW. It is not necessary to initiate bearer deletion to the P-GW;

 Step 1203: The S-GW sends a Packet Data Protocol (PDP) context response to the SGSN.

 Step 1204: The SGSN sends a detachment indication to the MME, and carries the detachment request type, and notifies the MME that the SGSN has completed detachment of the UE.

 Step 1205: The SGSN returns a detach accept message to the UE.

 This step is performed in a state where the detach type is not the UE being turned off.

 Step 1206: Release the signaling connection.

 The signaling connection between the UE and the base station and between the base station and the SGSN is released.

The dual-system registration, the MME single-system detachment initiated by the UE in the LTE is the same as the above-mentioned principle, and the difference is only the change of the execution entity, and details are not described herein again. Referring to FIG. 14, FIG. 14 is a thirteenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, in the case of dual registration, the UE detaches the single system initiated in the LTE, and only the attachment at the SGSN is removed.

 Step 1301: The UE sends a detach request message to the MME, indicating that the detach type is only attached to 2G/3G.

 Step 1302: The MME sends a detach indication to the SGSN, indicating that the detach type is only detached 2G/3G;

 Step 1303: After receiving the detach request, the SGSN sends a request to delete the PDP context to the S-GW, which may include the cause value indicating that the S-GW does not need to initiate the bearer deletion to the P-GW, and may not carry the cause value, S-GW. It is not necessary to initiate bearer deletion to the P-GW;

 Step 1304: The S-GW sends a delete PDP context response to the SGSN.

 Step 1305: The SGSN sends a detachment indication acknowledgement message to the MME, and carries the detachment request type, and notifies the MME that the SGSN has completed detachment of the UE.

 Step 1306: The MME returns a detach accept message to the UE.

 This step is performed in a state where the detach type is not the UE being turned off.

 Step 1307: Release the signaling connection.

 The signaling connection between the UE and the base station and between the base station and the SGSN is released.

 The difference between the embodiment and the embodiment is the detach request sent by the UE to the SGSN in the embodiment 12, and the detach request sent by the UE to the MME in this embodiment is sent by the MME to the SGSN. Attachment indication. In the case of the dual-system registration, the single-system detachment MME initiated by the UE to the SGSN is similar to the foregoing process, and is not described here.

 Referring to FIG. 15, which is a fourteenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this case, in the case of dual registration, the MME initiates the LTE to remove only the attachment of the UE in the MME. If only the UE is removed from the MME by the HSS, the step 1401 needs to be added before step 1401. The HSS sends the deletion location information to the MME.

 Step 1401: The MME sends a detach request message to the UE, indicating that the detach type is only attached to the SAE;

Step 1402: The MME sends a delete bearer request to the S-GW, which may include the cause value indicating that the S-GW does not need to initiate the bearer deletion to the P-GW, and may not carry the cause value, and the S-GW does not need to initiate the P-GW bearer deletion;

 Step 1403: The S-GW sends a delete bearer response to the MME.

 Step 1404: The MME sends a detachment indication to the SGSN, indicating that the detachment type is only detaching the SAE, and notifying the SGSN that the MME has completed detaching the UE.

 Step 1405: The SGSN sends a detach indication response to the MME.

 Step 1406: The UE returns a detach accept message to the MME.

 Step 1407: Release the signaling connection.

 The signaling connection between the UE and the MME is released, and the signaling connection between the MME and the base station is released.

 In the case of dual-system registration, the single-system detachment SGSN initiated by the SGSN is similar to the above process, and is not described here.

 Referring to FIG. 16, a fifteenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention is shown. This embodiment is based on the dual system registration, and the MME initiates only the attachment of the SGSN in the LTE.

 Step 1501: The MME sends a detach request message to the UE, indicating that the detach type is only attached to 2G/3G.

 Step 1502: The MME sends a detach indication to the SGSN, indicating that the detach type is only detached 2G/3G;

 Step 1503: After receiving the detach request, the SGSN sends a request to delete the PDP context to the S-GW, which may include the cause value indicating that the S-GW does not need to initiate the bearer deletion to the P-GW, and may not carry the cause value, by S- The GW itself determines that the bearer deletion to the P-GW is not initiated.

 Step 1504: The S-GW sends a delete PDP context response to the SGSN.

 Step 1505: The SGSN sends a detachment indication acknowledgement message to the MME, and carries the detachment request type, and notifies the MME that the SGSN has completed detachment of the UE.

 Step 1506: The UE returns a detach accept message to the MME.

 Step 1507: Release the signaling connection.

 The signaling connection between the UE and the base station and between the base station and the MME is released.

In the case of dual-system registration, the single-system detachment MME initiated by the SGSN is similar to the above process, and will not be described again. The difference between this embodiment and the thirteenth embodiment is that the removal of the attachment of the SGSN is initiated by the MME. Referring to FIG. 17, which is a 16th embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, under the single system registration, the SGSN registers with the HSS, and the UE initiates the removal of the UE in the SGSN only in the 2G/3G.

 Step 1601: The UE sends a detach request message to the SGSN, indicating that the detach type is only attached to 2G/3G.

 Step 1602: After receiving the detach request, the SGSN sends a request to delete the PDP context to the S-GW, which may include the cause value indicating that the S-GW does not need to initiate the bearer deletion to the P-GW, and may not carry the reason value, by S- The GW itself determines that the bearer deletion to the P-GW is not initiated.

 Step 1603: The S-GW sends a delete PDP context response to the SGSN.

 Step 1604: The SGSN sends a detachment indication to the MME, carries the detachment request type, and notifies the MME that the SGSN has completed detachment of the UE.

 Step 1605: The MME initiates a location update to the HSS, and registers the MME to the HSS.

 Step 1606: The HSS and the SGSN perform location deletion.

 The HSS deletes the registration information of the SGSN, and the SGSN deletes the context information about the UE.

 Step 1607: The HSS sends an update location confirmation message to the MME.

 Step 1608: The MME sends a detach indication confirmation message to the SGSN.

 Step 1609: The SGSN returns a detach accept message to the UE.

 This step is performed in a state where the detach type is not the UE being turned off.

 Step 1610: Release the signaling connection.

 The signaling connection between the UE and the base station and between the base station and the SGSN is released.

 In the case of single-system registration (the MME is registered to the HSS), the single-system detachment MME initiated by the UE in the LTE is similar to the above process, and is not described here. The difference between this embodiment and the fifteenth embodiment is that the MME needs to be registered to the HSS after removing the attachment of the UE to the SGSN. If the MME is registered to the HSS in the same manner, in step 1604, the SGSN deletes the MM context related to the UE before sending the detach indication to the MME, and does not need to perform steps 1605, 1606, and 1607, and the other steps are the same. .

Referring to FIG. 18, it is a seventeenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, under the single system registration, the MME registers with the HSS, and the UE initiates in the 2G/3G to remove only the single system detachment of the UE in the MME. Step 1701: The UE sends a detach request message to the SGSN, indicating that the detach type is only detaching the SAE.

 Step 1702: The SGSN sends a detach indication message to the MME, and carries the detach type to only attach the SAE.

 Step 1703: The MME sends a delete bearer request to the S-GW, which may include the cause value indicating that the S-GW does not need to initiate the bearer deletion to the P-GW, and may not carry the cause value, and the S-GW itself determines not to initiate to the P- GW bearer deletion;

 Step 1704: The S-GW sends a delete bearer response to the MME.

 Step 1705: The MME sends a detach indication confirmation message to the SGSN, and notifies the SGSN that the MME has completed detachment of the UE.

 Step 1706: The SGSN initiates a location update to the HSS, and registers the SGSN to the HSS.

 Step 1707: The HSS and the MME perform location deletion.

 The HSS deletes the registration information about the MME, and the MME deletes the MM context information about the UE. Step 1708: The HSS sends a location update confirmation message to the SGSN.

 Step 1709: The SGSN returns a detach accept message to the UE.

 This step is performed in a state where the detach type is not the UE being turned off.

 Step 1710: Release the signaling connection.

 The signaling connection between the UE and the base station and between the base station and the SGSN is released.

 In the case of single-system registration (the SGSN is registered to the HSS), the single-system detachment of the SGSN initiated by the UE in the LTE is similar to the above process, and is not described here. In this embodiment, if the SGSN is registered to the HSS in the same manner, in step 1705, the MME deletes the MM context information about the UE at the same time, and does not perform steps 1706, 1707, and 1708, and the other steps are the same.

 Referring to FIG. 19, it is an embodiment 18 of the method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, under the single system registration, the MME registers with the HSS, and the MME initiates the removal of the UE in the MME.

 Step 1801: The MME sends a detach request message to the UE, indicating that the detach type is only attached to the SAE.

Step 1802: The MME sends a delete bearer request to the S-GW, which may include the cause value indicating that the S-GW does not initiate the bearer deletion to the P-GW, and may not carry the cause value, and the S-GW itself determines that The bearer deleted to the P-GW is initiated.

 Step 1803: The S-GW sends a delete bearer response to the MME.

 Step 1804: The MME sends a detachment indication message to the SGSN, and carries the detachment type indication to notify the SGSN that the MME has completed detachment of the UE.

 Step 1805, the SGSN initiates a location update to the HSS, and registers the SGSN to the HSS.

 Step 1806: The HSS and the MME perform location deletion.

 The HSS deletes the registration information of the SGSN, and the SGSN deletes the context information about the UE.

 Step 1807: The HSS sends an update location confirmation message to the SGSN.

 Step 1808: The SGSN sends a detach indication confirmation message to the MME.

 Step 1809: The UE returns a detach accept message to the MME.

 Step 1810: Release the signaling connection.

 The signaling connection between the UE and the base station and between the base station and the MME is released.

 In this embodiment, in the same case, if the SGSN registers with the HSS, in step 1804, the MME simultaneously deletes the MM context for the UE, and does not need to perform steps 1805, 1806, 1807. In the case of a single system registration (the SGSN is registered to the HSS), the SGSN initiated by the SGSN in the 2G/3G is similar to the above process, and is not described here.

 In the case of the above-mentioned single-system registration, the detachment type is a single-system detachment. The following principles are followed: If the SGSN is registered to the HSS and the MME is detached, the MME must only delete the MM context of the MME. When attaching the SGSN, the MME is required. The registration information is updated to the HSS, so that the MME registers with the HSS. If the MME registers with the HSS and attaches the MME, the SGSN needs to update the registration information to the HSS. When the SGSN is attached, the MMSN of the SGSN is deleted.

Referring to FIG. 20, it is a nineteenth embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In the above description, the first embodiment to the eleventh embodiment respectively describe the case where the user equipment is jointly detached; in the method of joint detaching, the first network access control entity is triggered to perform detachment, and the first network access control entity notifies the first The second network access control entity performs the joint de-attachment. This embodiment provides a different notification mode than the foregoing joint detachment embodiment. In the case of the joint detachment, the S-GW initiates the bearer deletion to the P-GW. This embodiment provides Different from the execution sequence of the first embodiment to the eleventh embodiment, the embodiment sends the bearer to the P-GW after the S-GW deletes the bearers of the first network access control entity and the second network access control entity. Delete; the execution order also applies to the first embodiment to the tenth embodiment Step 1901: The UE sends a detach request message to the MME, and carries a joint detachment indication. The step is to trigger the detach operation of the first network control entity, and may also initiate a joint detach operation by the MME itself, or may be performed by the HSS to the MME. A delete location message including a joint detach operation indication is sent, and the MME is triggered to perform a joint detach operation.

 Step 1902: The MME sends a delete bearer request to the S-GW.

 In this step, the first network access control entity sends a delete bearer request to the S-GW, and the S-GW deletes bearer information related to the MME.

 Step 1903: The S-GW returns a delete bearer response message to the MME.

 The S-GW returns a delete bearer response message to the first network access control entity.

 Step 1904: The MME sends an update location message to the HSS.

 The message carries an indication of deactivation limiting signaling; it may be carrying a special cause value, or carrying the update type to a special value, or other indication parameter.

 Step 1905: The HSS sends a location deletion message to the SGSN.

 The location deletion message carries an indication of deactivation restriction signaling; it may be carrying a special cause value, or carrying the deletion type as a special value, or other indication parameter.

 Step 1906: The SGSN sends a delete bearer request to the S-GW.

 In this step, the second network access control entity sends a delete bearer request to the S-GW, where the delete bearer request message is a PDP context delete request message; and the S-GW deletes the bearer information related to the user equipment and the SGSN.

 Step 1907: The S-GW initiates bearer deletion to the P-GW.

 After the S-GW deletes the bearer information of the user equipment and the MME and the SGSN, the S-GW initiates deletion to the P-GW.

 Step 1908: The S-GW returns a bearer deletion response message to the SGSN.

 Step 1909: The SGSN returns a delete location confirmation message to the HSS.

 Step 1910: The HSS returns an update location confirmation message to the MME.

 Step 1911: The MME returns a detach accept message to the UE.

If the detach request is non-shutdown to attach, perform this step, otherwise do not perform this step. Step 1912: Release the signaling connection. The signaling connection between the UE and the base station, the base station and the UI is released.

 In this embodiment, when the UE initiates the joint detachment as an example to illustrate the joint detachment, the first network access control entity notifies the second network access control entity that the joint detachment is different from the first embodiment to the eleventh embodiment; In the case of the eleventh embodiment, the method for the first network access control entity provided by the first embodiment to notify the second network access control entity to jointly detach by the HSS is also applicable; the UE-initiated restriction signaling in the 2G/3G The lower joint detachment is similar to the above solution. The only difference is that the name of the message sent by the system changes, and is not described here.

 Referring to FIG. 21, it is a twenty-second embodiment of a method for detaching a user equipment according to an embodiment of the present invention. In this embodiment, under the joint detachment, the first network access control entity notifies the second network access control entity, and the embodiment provides the same notification manner as the nineteenth embodiment, except that the first network access control The entity first notifies the second network access control entity to perform detachment of the own system, and the S-GW initiates the bearer deletion to the P-GW after the first network access control entity performs its own system detachment.

 Step 2001: Send a detach request message to the UE, and carry a joint detachment indication. The step is to trigger a detach operation of the first network control entity, and the detachment operation may be initiated by the HSS, or may be sent by the HSS to the ΜΜΕ The delete location message indicated by the joint detach operation triggers the joint detach operation. The detachment request message may carry a detach type parameter to indicate whether the UE reattaches. If the message carries the UE reattachment, step 2012 is not performed.

 Step 2002, sending an update location message to the HSS;

 The message carries an indication of deactivation limiting signaling; it may be carrying a special cause value, or carrying the update type to a special value, or other indication parameter.

 Step 2003: The HSS sends a location deletion message to the SGSN.

 The location deletion message carries an indication of deactivation restriction signaling; it may be carrying a special cause value, or carrying the deletion type as a special value, or other indication parameter.

 Step 2004: The SGSN sends a delete bearer request to the S-GW.

In this step, the second network access control entity sends a delete bearer request to the S-GW, where the delete bearer request message is a PDP context delete request message; and the S-GW deletes bearer information related to the SGSN of the user equipment. Step 2005: The S-GW returns a bearer deletion response message to the SGSN.

 Step 2006, the SGSN returns a delete location confirmation message to the HSS.

 Step 2007: The HSS returns an update location confirmation message to the MME.

 Step 2008: The MME sends a delete bearer request to the S-GW.

 In this step, the first network access control entity sends a delete bearer request to the S-GW, and the S-GW deletes bearer information related to the MME.

 Step 2009: The bearer initiated by the S-GW to the P-GW is deleted;

 After the S-GW deletes the bearer information of the user equipment and the MME and the SGSN, the S-GW initiates deletion to the P-GW.

 Step 2010: The S-GW returns a delete bearer response message to the MME.

 The S-GW returns a delete bearer response message to the first network access control entity.

 Step 2011: The UE returns a detach accept message to the MME.

 Step 2012, release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

 In this embodiment, the first network access control entity notifies the second network access control entity that the joint detachment is different from the first embodiment to the eleventh embodiment, and the execution sequence of the step is different from that of the embodiment 19, and at the same time, After the first network access control entity is detached from the system, the S-GW re-initiates the bearer deletion to the P-GW. In the first to eleventh embodiments, the MME-initiated detach request is also applicable to the eNB. After the first network access control entity detaches the system, the S-GW re-initiates the bearer deletion to the P-GW; the joint detachment under the restriction signaling initiated by the SGSN in the 2G/3G is similar to the above solution, except that the difference lies in The name of the message sent by the system changes, and is not mentioned here. The bearer deletion method provided in this embodiment is also applicable to the joint detachment initiated by the UE in the LTE and the 2G/3G, and the bearer deletion method provided in the ninth embodiment is also applicable to the joint detachment initiated by the MME and the SGSN. I will not repeat them here.

Referring to FIG. 22, it is a twenty-first embodiment of a method for detaching a user equipment according to an embodiment of the present invention. Embodiment 12, the fourteenth, the sixteenth, and the eighteenth respectively describe the case where the single system is detached, and the self-system is triggered to be attached to the user equipment. The embodiment provides that after the first network access control entity is detached, the notification is not notified. The second network access control entity notifies the HSS to delete the information associated with the first network access control entity. Step 2101: The UE sends a detach request message to the MME, and carries a single system to attach the LTE indication.

 This step is to trigger the detach operation of the first network control entity, or the MME itself may initiate a single system to attach the LTE operation. When the MME initiates the detachment of the system, the detachment request message may carry the detachment type parameter to indicate whether the UE reattaches. If the message carries the UE reattachment, step 2107 is not performed.

 Step 2102: The MME sends a delete bearer request to the S-GW.

 In this step, the first network access control entity sends a delete bearer request to the S-GW, and the S-GW deletes bearer information related to the MME.

 Step 2103: The S-GW returns a delete bearer response message to the MME.

 The S-GW returns a delete bearer response message to the first network access control entity.

 Step 2104: The MME sends a clear UE message to the HSS.

 The clear UE message carries a deactivation limit signaling indication, which may be a special cause value or other indication parameter identifier.

 Step 2105: The HSS returns a clear UE acknowledgement message to the UE.

 The HSS also sets the MME to the clear state.

 Step 2106: The MME returns a detach accept message to the UE.

 Step 2107: Release the signaling connection.

 The signaling connection between the UE and the base station and between the base station and the MME is released.

 This embodiment takes the UE to trigger the MME's own system detachment as an example. The difference from the 12th, 14th, 16th, and 18th embodiments is that the first network access control entity does not notify the second network after attaching. The ingress control entity has detached, but informs the HSS to set the first network access entity to the clear state, and the UE initiates the restriction signaling in the 2G/3G to place the 2G/3G and the SGSN actively initiated 2G/3G. The single system detachment is similar to the above solution. The difference is that the system sends different messages differently. The method implementation principle is the same, and is not described here.

Referring to FIG. 23, it is a twenty-second embodiment of a method for detaching a user equipment according to an embodiment of the present invention. The above-mentioned embodiments thirteen, fifteen, and seventeen respectively describe the case where a single system triggers another system to perform single system detachment under different network conditions. In this embodiment, when the single system triggers another system to perform single system detachment, the first network access control entity notifies the second network access control entity to perform single system detachment, The embodiment provides a notification manner different from the above-described thirteenth, fifteenth, and seventeenth system detachment embodiments.

 Step 2201: The UE sends a detach request message to the MME, and carries a single system to attach the 2G/3G indication.

 This step is to trigger the detach operation of the first network control entity, or the MME itself may initiate a single system to attach the 2G/3G operation. If the single-system detachment initiated by the MME, the detachment request message may carry the detachment type parameter to indicate whether the UE re-attaches. If the message carries the UE re-attachment, step 2209 is not performed.

 Step 2202: The MME sends an update location message to the HSS.

 The message carries an indication of deactivation limiting signaling; it may be carrying a special cause value, or carrying the update type to a special value, or other indication parameter.

 Step 2203: The HSS sends a location deletion message to the SGSN.

 The location deletion message carries an indication of deactivation restriction signaling; it may be carrying a special cause value, or carrying the deletion type as a special value, or other indication parameter.

 Step 2204: The SGSN sends a delete bearer request to the S-GW.

 In this step, the second network access control entity sends a delete bearer request to the S-GW, where the delete bearer request message is a PDP context delete request message; and the S-GW deletes the bearer information related to the user equipment and the SGSN.

 Step 2205: The S-GW returns a bearer deletion response message to the SGSN.

 Step 2206: The SGSN returns a delete location confirmation message to the HSS.

 Step 2207: The HSS returns an update location confirmation message to the MME.

 Step 2208: The MME returns a detach accept message to the UE.

 Step 2209: Release the signaling connection.

 The signaling connection between the UE and the base station, the base station and the MME is released.

In this embodiment, when the first network access control entity triggers the second network access control entity to perform single system detachment, a method different from the thirteenth, fifteenth, and seventeenth embodiments is adopted, and the UE is in the 2G/3G. The LTE single system detachment under the LTE single system detachment and the SGSN initiated by the restricted signaling is similar to the above solution. The difference is that the system is different, the sent messages are different, and the method implementation principle is the same. Narration. The embodiment of the present invention separately performs joint de-attachment or single-system detachment of the UE in the case of dual registration and single registration, and generally describes the detach procedure of the UE under restricted signaling, and the UE goes in a registered network access control entity. After attaching, another network access control entity is notified in various ways, so that another network access entity performs subsequent process operations.

 A person skilled in the art can understand that all or part of the steps carried by the method of the foregoing embodiment can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium. , including one or a combination of the steps of the method embodiments.

 In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.

 The above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

 The method for detaching the user equipment provided by the present invention is described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, there are changes in the specific implementation manner and application scope. In summary, the content of the specification should not be construed as limiting the invention.

Claims

Rights request

 A method for attaching user equipment, characterized in that it comprises:

 And triggering a detach operation of the first network access control entity, where the type of the detach operation is a joint detach operation;

 The first network access control entity performs a corresponding de-attach operation according to the type of the detach operation, and triggers a joint detach operation of the second network access control entity;

 The second network access control entity performs a corresponding detach operation according to the trigger of the first network access control entity.

 The method for detaching a user equipment according to claim 1, wherein the step of triggering the detach operation of the first network access control entity is specifically:

 The user equipment sends a de-attach request message including a joint detach operation indication to the first network access control entity; or

 The first network access control entity determines to initiate a joint detach operation according to the preset condition; or, the home subscription user server HSS sends a delete location message including a joint detach operation indication to the first network access control entity.

 The method for detaching a user equipment according to claim 2, wherein the step of the first network access control entity performing a corresponding detach operation according to the type of the detach operation comprises:

 The first network access control entity sends a bearer deletion request to the serving gateway S-GW, where the request instructs the S-GW to delete all session management SM contexts;

 The S-GW deletes all SM contexts and initiates bearer deletion to the packet data network gateway P-GW.

 The method for detaching a user equipment according to claim 3, wherein the step of triggering a joint detach operation of the second network access control entity comprises:

 The first network access control entity sends a joint detach request message to the second network access control entity, where the request message indicates that the second network access control entity does not initiate bearer deletion to the S-GW.

The method for detaching a user equipment according to claim 4, wherein the second network access control entity performs a corresponding detaching operation according to the trigger of the first network access control entity , Also includes: A detach confirmation message is fed back to the first network access control entity.

 The method for detaching a user equipment according to claim 4, wherein the step of the second network access control entity performing a corresponding detach operation according to the trigger of the first network access control entity comprises: :

 The second network access control entity sends a location update message to the HSS;

 The HSS performs location deletion with the first network access control entity;

 The HSS sends a location update response message to the second network access control entity.

 The method for detaching a user equipment according to claim 2, wherein the step of the first network access control entity performing a corresponding detach operation according to the type of the detach operation comprises:

 The first network access control entity sends a bearer deletion request to the S-GW;

 The S-GW sends a bearer deletion request to the P-GW.

 The method for detaching a user equipment according to claim 7, wherein the step of triggering a joint detach operation of the second network access control entity comprises:

 The first network access control entity sends a joint detach request message to the second network access control entity.

 The method for detaching a user equipment according to claim 7, wherein the step of triggering a joint detach operation of the second network access control entity comprises:

 The first network access control entity sends a location update message to the HSS;

 The HSS performs location deletion with the second network control entity;

 The HSS sends a location update response message to the first network control entity.

 The method for detaching a user equipment according to claim 3, wherein the step of triggering a joint detach operation of the second network access control entity comprises:

 The first network access control entity deletes the MM context associated with the UE that is stored by itself, and sends a joint detach request message to the second network access control entity, where the request message indicates that the second network access control entity does not initiate The bearer of the S-GW is deleted.

The method for detaching a user equipment according to claim 10, wherein the step of performing, by the second network access control entity, the corresponding detaching operation according to the trigger of the first network access control entity , Also includes: A detach confirmation message is fed back to the MME.

 The method for detaching a user equipment according to claim 2, wherein the step of the first network access control entity performing a corresponding detach operation according to the type of the detach operation comprises:

 The first network access control entity sends a bearer deletion request to the S-GW, where the request instructs the S-GW to delete bearer information related to the first network access control entity;

 The S-GW sends a delete bearer response message to the first network access control entity.

 The method for detaching a user equipment according to claim 12, wherein the step of triggering a joint detach operation of the second network access control entity comprises:

 The first network access control entity sends an update location message to the HSS, where the update location message carries an indication of deactivation restriction signaling;

 The HSS sends a location deletion message to the second network access control entity, where the location deletion message carries an indication of deactivation limiting signaling.

 The method for detaching a user equipment according to claim 12 or 13, wherein the second network access control entity performs a corresponding detach operation according to the trigger of the first network access control entity. The steps include:

 And the second network access control entity sends a delete bearer request to the S-GW, where the request instructs the S-GW to delete bearer information related to the second network access control entity.

 The method for detaching user equipment according to claim 14, wherein after the S-GW deletes the bearer information related to the second network access control entity, the method further includes: initiating to the P-GW The bearer is deleted.

 The method for detaching a user equipment according to claim 15, wherein, after the S-GW initiates the bearer deletion to the P-GW, the method further includes:

 Returning, by the S-GW, a bearer deletion message to the second network access control entity;

 And the second network access control access entity returns a delete location confirmation message to the HSS; the HSS sends an update location confirmation message to the first network access control entity.

 17. A method of detaching a user equipment, the method comprising:

Triggering a detach operation of the first network access control entity, the type of the detach operation being a single system detach operation; The first network access control entity performs a corresponding detach operation according to the type of the detach operation;

 The first network access control entity notifies the second network access control entity that the corresponding detach operation has been performed.

 The method for detaching a user equipment according to claim 17, wherein the step of triggering the detach operation of the first network access control entity is specifically:

 The user equipment UE sends a detach request message including a single system detach operation indication to the first network access control entity; or

 The first network access control entity determines to initiate a single system detach operation according to the preset condition; or the home subscription user server HSS sends a delete location message to the first network access control entity, and the first network access control entity deletes according to the The location message initiates a single system detach operation.

 The method for detaching a user equipment according to claim 18, wherein the step of the first network access control entity performing a corresponding detach operation according to the type of the detach operation comprises:

 The first network access control entity sends a bearer deletion request to the serving gateway S-GW, and the S-GW does not send the bearer deletion of the packet data network gateway P-GW;

 The S-GW deletes the session management SM context corresponding to the system where the first network access control entity is located; and the S-GW sends a bearer deletion response to the first network access control entity.

 The method for detaching a user equipment according to claim 19, wherein the step of the S-GW transmitting a bearer deletion response to the first network access control entity includes:

 The first network access control entity sends a detachment indication message to the second network access control entity, where the message carrying the detached request type is a single system detachment, and indicates that the detachment of the UE has been completed.

 The method for detaching a user equipment according to claim 20, wherein the step of the first network access control entity sending a detach indication message to the second network access control entity comprises:

 The second network access control entity initiates a location update to the HSS;

 The HSS performs location deletion with the first network access control entity;

The HSS sends an update location confirmation message to the second network access control entity.

The method for detaching a user equipment according to claim 19, wherein the step of the S-GW transmitting a bearer deletion response to the first network access control entity includes:

 The first network access control entity deletes its own MM context associated with the UE;

 Sending a detachment indication message to the second network access control entity, where the type of the request to carry the detachment is a single system detachment, and indicating that the detachment of the UE has been completed;

 The second network access control entity sends a detach confirmation message to the first network access control entity.

The method for detaching a user equipment according to claim 18, wherein the step of the first network access control entity performing a corresponding detach operation according to the type of the detach operation comprises:

 The first network access control entity sends a bearer deletion request to the S-GW, and the S-GW does not initiate bearer deletion to the P-GW;

 After performing the bearer deletion, the S-GW feeds back the bearer deletion response message to the first network access control entity.

The method for detaching a user equipment according to claim 23, wherein after the step of performing the bearer deletion, the S-GW returns a bearer deletion response message to the first network access control entity, and the method includes:

 The first network access control entity sends a detach message to the second network access control entity, where the detached request type carried in the message is a single system detachment;

 The second network access control entity sends a detach confirmation message to the first network access control entity.

The method for detaching a user equipment according to claim 23, wherein after the step of performing the bearer deletion, the S-GW returns a bearer deletion response message to the first network access control entity, and the method includes:

 The first network access control entity sends a detach message to the second network access control entity, where the detached request type carried in the message is a single system detachment;

 The second network access control entity initiates a location update to the HSS;

 The HSS performs location deletion with the first network access control entity;

 The HSS returns an update location confirmation message to the second network access control entity;

 The second network access control entity sends a detach confirmation message to the first network access control entity.

The method for detaching a user equipment according to claim 23, wherein the S-GW performs a bearer deletion and returns a step of the bearer deletion response message to the first network access control entity. After the meeting includes:

 The first network access control entity deletes its own MM context associated with the UE;

 Sending a detach message to the second network access control entity, where the type of the request carrying the detachment is a single system detachment;

 The second network access control entity sends a detach confirmation message to the first network access control entity.

27. A method of detaching a user equipment, the method comprising:

 The first network access control entity triggers a detach operation of the second network access control entity, and the type of the detach operation is a single system detach operation;

 The second network access control entity performs a corresponding de-attachment operation according to the type of the detach operation.

 The method for detaching a user equipment according to claim 27, wherein the step of the first network access control entity triggering the detaching operation of the second network access control entity comprises:

 The user equipment sends a detach request message to the first network access control entity, where the type of the request to carry the detachment is a single system detachment;

 Or, the first network access control entity confirms to initiate a single system detach operation.

 The method for detaching the user equipment according to claim 28, wherein after the step of performing the corresponding detaching operation according to the type of the detaching operation, the second network access control entity further includes:

 The second network access control entity sends a detachment response message to the first network access control entity, where the message indicates that detachment of the UE has been completed.

 The method for detaching a user equipment according to claim 28, wherein after the step of performing the corresponding detaching operation according to the type of the detaching operation, the second network access control entity further includes:

 The first network access control entity sends a location update message to the home subscriber server HSS;

The HSS performs location deletion with the second network access control entity;

 The HSS sends a Location Update Confirm message to the first network access control entity.

The method for detaching a user equipment according to claim 27, wherein the first network access control entity triggers a detach operation of the second network access control entity, including: The first network access control entity sends an update location message to the HSS, where the update location message carries an indication of deactivation restriction signaling;

 The HSS sends a location deletion message to the second network access control entity, where the location deletion message carries an indication of deactivation limiting signaling.

 The method for detaching a user equipment according to claim 31, wherein the performing, by the second network access control entity, the corresponding detaching operation according to the triggering of the first network access control entity includes the following steps:

 The second network access control entity sends a bearer deletion request to the serving gateway S-GW, where the bearer deletion request instructs the S-GW to delete bearer information related to the second network access control entity, and does not initiate to the packet data network. The bearer of the gateway P-GW is deleted;

 The S-GW returns a bearer deletion response message to the second network access control entity.

 The method for detaching user equipment according to claim 31 or 32, wherein the second network access control entity performs corresponding deduction according to the trigger of the first network access control entity. After the attachment operation:

 The second network access control entity returns a delete location confirmation message to the HSS; the HSS returns an update location confirmation message to the first network access control entity; the first network access control entity to the user equipment Returns the detach attachment message.

 34. A method for detaching a user equipment, comprising:

 Trigating a detach operation of the first network access control entity, the type of the detach operation being a single system detach operation;

 The first network access control entity performs a corresponding de-attach operation according to the type of the detach operation;

 The first network control entity notifies the home subscriber server HSS to set the first network control entity to the clear state.

 The method for detaching a user equipment according to claim 34, wherein the step of triggering a detach operation of the first network access control entity comprises:

The first network access control entity determines to initiate a single system detach operation according to the preset condition; or, the user equipment UE sends a detach request message to the first network access entity, where the message carries the detached request type De-attach for a single system.

The method for detaching user equipment according to claim 35, wherein the step of the first network access control entity notifying the HSS to set the first network control entity to the clear state includes:

 The first network access control entity sends a clear UE message to the HSS, where the clear UE message carries a deactivation limiting signaling indication;

 The HSS returns a clear UE acknowledgement message to the UE, and sets the first network access control entity to a clear state.

 The method for detaching user equipment according to claim 35 or claim 36, wherein the first network access control entity notifies the HSS that the first network access control entity is set to the clear state, the first network The access control entity returns a detach accept message to the user equipment.