WO2009149619A1

WO2009149619A1 - Method, system and apparatus for detaching user equipment

Info

Publication number: WO2009149619A1
Application number: PCT/CN2009/000645
Authority: WO
Inventors: 熊春山; 艾明
Original assignee: 大唐移动通信设备有限公司
Priority date: 2008-06-11
Filing date: 2009-06-11
Publication date: 2009-12-17
Also published as: CN101605315A; CN101605315B

Abstract

The invention discloses a method for detaching a user equipment (UE). The method includes the following steps: in the case of Idle Mode Signalling Reduction (ISR) of the UE being active, the first user mobile control management entity of one radio access type and the second user mobile control management entity of the other radio access type which are registered by the UE acquire the status of Implicit Detach Permitted(IDP) flag of the UE stored by the opposite entity according to the process of requesting the context status of the UE; when it is determined that the status of IDP flag of the UE stored by both the first user mobile control management entity and the second user mobile control management entity is set, the first user mobile control management entity and the second user mobile control management entity implicitly detach the UE respectively. The invention also discloses a system and apparatus for detaching the UE.

Description

Method, system and device for detaching user terminal

The present invention relates to the field of communications technologies, and in particular, to a method, system, and apparatus for detaching a user terminal. Background technique

Idle State Signaling Reduction (ISR) technology is a technology proposed by 3GPP's Evolved Packet System (EPS). When the user terminal (UE)'s ISR function is activated, the UE is simultaneously registered to the Universal Terrestrial Radio Access Network (UTRAN)/Global System for Mobile communication (GSM). EDGE (Enhanced Data Rates for GSM Evolution) Wireless Access Network (GERAN, GSM/EDGE Radio Access Network), E-UTRAN (Evolved Universal Terrestrial Radio Access Network) Access System User Mobile Control Management Entity (UEMCME), that is, simultaneously registered to the GPRS (General Packet Radio Service) Support Node (SGSN) and Mobility Management Entity (MME, Mobility Management Entity) The SGSN is a user mobility control management entity of a radio access type (RAT), and the MME is a user mobility control management entity of another RAT.

When the UE is in an idle state, the UE allocates to the routing area (RA of the UE in the SGSN,

In the process of moving in the tracking area (TA) of the tracking area (TA) allocated to the UE by the MME, there is no need to perform the operation of the general routing area update or the general tracking area update. When the UE's ISR function is activated, the UE's user plane termination point is located at the Serving GW.

Section 4.3.5.2 of the existing TS 23.401v8.2.0 indicates that after the ISR function of the UE is activated, for the UE, when the MME enters an idle state, the MME starts a user reachability timer (MRT, Mobile Reachable Timer), if the MRT times out, the MME clears the paging processing identifier (PPF, Paging Proceed Flag) of the UE, that is, does not page the UE. At this time, the Serving GW sends a downlink data notification to the MME (Downlink Data). After the Notification message, the MME does not page the UE and sends a Downlink Data Notification Reject message to the Serving GW. At the same time, the MME will also start a second timer (Timer). After the second timer expires, the MME determines whether the ISR function of the UE is activated. If the ISR function of the UE is activated, the MME will save the UE's "permitted non-permitted". The status of the identifier (IDP, Implicit Detach permitted) is set to the set state, that is, the UE is allowed to be de-attached. If the ISR function of the UE is not activated, the MME may implicitly attach the UE if it is implicitly (Implicitly). The MME establishes a signaling connection, and the MME sets the state of the IDP identifier of the UE that is saved by itself to the clear state, and sets the paging processing identifier (PPF, Paging Proceed Flag) of the UE, that is, the UE is not allowed. Paging.

In summary, the IDP flag of this UE has only two states: set state and clear state. When the UE's ISR function is activated, the SGSN has a similar function as ΜΜΕ. For example, when the SGSN is in the idle state, when the second timer in the SGSN expires, the SGSN sets the state of the IDP identifier of the UE that is saved by itself to the set state.

In the prior art, after the ISR function of the UE is activated, after the MME and the SGSN respectively set the state of the IDP identifier of the UE that is saved by the MME and the SGSN to the set state, the MME and the SGSN may respectively initiate non-clearly at any subsequent time. The process of attaching this UE. However, it is not clear in the prior art that the MME and the SGSN know that the state of the IDP identifier of the same UE that is saved by the peer is also in the set state, and thus the state cannot implement the state in which the MME and the SGSN learn the IDP identifier of the same UE saved by the other party. Both of them are setting states and then initiating a process of non-specifically detaching the UE. Summary of the invention

Embodiments of the present invention provide a method, system, and apparatus for detaching a user terminal, so that user mobility control management entities (such as MME and SGSN) of two different radio access types can obtain The state of the IDP flag of the same UE stored by the other party is known, and when it is determined that the IDP flag of the same UE stored by the other party is in the set state, the unambiguous detachment of the UE is implemented.

A method for detaching a user terminal according to an embodiment of the present invention includes:

In the case that the idle state signaling optimization function of the user terminal is activated, the first user mobility control management entity of one type of wireless access registered by the user terminal and the second user mobility control management entity of another type of wireless access Knowing, by the user terminal context state request process, the state of the non-clear detachment (IDP) identifier of the user terminal saved in the counterpart entity;

When it is determined that the states of the IDP identifiers of the user terminals saved in the first user mobility control management entity and the second user mobility control management entity are all in a set state, the first user mobility control management entity and the second user mobility control management entity respectively The user terminal is not explicitly attached.

The embodiment of the present invention provides a communication system, which is applied to the activation of an idle state signaling optimization function of a user terminal, where the system includes: a first user mobility control management entity of a wireless access type registered by the user terminal; Another second type of mobile control management entity of the wireless access type;

The first user mobility control management entity is configured to learn, by the user terminal context state request process, a status of the IDP identifier of the user terminal saved in the second user mobility control management entity; and, when determining itself and the second user mobility control management entity When the state of the IDP identifier of the user terminal saved in the state is the set state, the user terminal is not explicitly attached;

The second user mobility control management entity is configured to learn, by the user terminal context state request process, a status of the IDP identifier of the user terminal saved in the first user mobility control management entity; and, when determining itself and the first user mobility control management entity When the state of the IDP identifier of the user terminal saved in the state is the set state, the user terminal is not explicitly attached.

The embodiment of the present invention provides a user mobility control management apparatus, which is applied to the activation of the idle state signaling optimization function of the user terminal, where the apparatus includes:

a setting unit, configured to set and save a state of the user terminal that allows a non-clear detachment (IDP) identifier;

An information interaction unit, configured to learn, by using a user terminal context state request process, a user terminal note Another type of wireless access type user mobile control management entity saved in the user terminal

The status of the IDP identifier;

a non-explanatory detachment unit, configured to: when determining that the state of the IDP identifier of the user terminal saved in the user mobility control management entity of the setting unit and the another wireless access type is a set state, User terminal.

In the embodiment of the present invention, when the ISR function of the UE is activated, the first user mobility control management entity of one radio access type registered by the UE and the second user mobility control management of another radio access type The entity learns the state of the IDP identifier of the UE saved in the peer entity through the user terminal context state request procedure; when determining the state of the IDP identifier of the UE saved in the first user mobility control management entity and the second user mobility control management entity When the state is set, the first user mobility control management entity and the second user mobility control management entity do not explicitly attach the UE, respectively, so that when the ISR function of the UE is activated, the user mobility control management of the two RATs registered by the UE is implemented. The entity (for example, the MME and the SGSN) can know that the status of the IDP identifier of the UE saved by both parties is the set state, and in this case, implementing the two user mobility control management entities to initiate the ambiguity of the UE De-attachment process. DRAWINGS

1 is a schematic diagram of a general flow of a non-definitely detached UE according to an embodiment of the present invention; FIG. 2 is a method for querying a state value of an IDP identifier between two user mobility control management entities registered by a UE according to an embodiment of the present invention; Schematic diagram of the process;

FIG. 3 is a schematic diagram of a process of a non-clearly detached UE initiated by an SGSN and an MME after an ISR function of a UE is activated according to an embodiment of the present invention;

4 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a user mobility control management apparatus according to an embodiment of the present invention. detailed description

Embodiments of the present invention provide a method, system, and device for detaching a UE, to implement two The user mobility control management entities (for example, the MME and the SGSN) of different radio access types learn that the state of the IDP identifier of the same UE saved by the other party is the set state, and, in this case, implements the two user mobility control management entities. Non-clear detachment of the UE, respectively.

The UE described in the embodiment of the present invention refers to a UE after the ISR function is activated, and the UE is registered to the user mobility control management entity SGSN and the MME, and the SGSN and the MME are user mobility control management entities of different RATs. The first user mobility control management entity in the embodiment of the present invention is a user mobility control management entity of a RAT; and the second user mobility control management entity is a user mobility control management entity of another RAT. For example, if the first user mobility control management entity is an SGSN, the second user mobility control management entity is an MME; if the first user mobility control management entity is an MME, the second user mobility control management entity is an SGSN. The two RATs are different access types of the 3GPP system, and if one of the RATs corresponds to UTRAN/GERAN, the other RAT corresponds to the E-UTRAN. It should be noted that the user mobility control management entity in the present invention includes, but is not limited to, an SGSN and an MME.

The embodiments of the present invention will be described below with reference to the accompanying drawings.

Referring to FIG. 1, a method for non-exclusively detaching a UE according to an embodiment of the present invention generally includes:

5101. When the ISR function of the UE is activated, the first user mobility control management entity of one RAT registered by the UE and the second user mobility control management entity of another RAT learn the other party through the user terminal context state request process. The state of the non-clearly detached IDP identifier of the UE saved in the entity;

5102. When the first user mobility control management entity and the second user mobility control management entity determine that the states of the IDP identifiers of the UEs saved in the first user mobility control management entity and the second user mobility control management entity are all set. The first user mobility control management entity and the second user mobility control management entity respectively do not explicitly attach the UE.

The following describes in detail how the MME and the SGSN know the state of the IDP identifier of the same UE saved by the other party in the setting state in the embodiment of the present invention.

Referring to FIG. 2, when the ISR function of the UE is activated, when the state of the IDP identifier of the UE saved by the first user mobility control management entity of the UE is the set state, the first user mobility control management The second user mobility control management entity of the UE sends a UE Context Status Request message, including a user identity (UE Identity) for identifying the UE, such as an international mobile subscriber identity (IMSI, International Mobile) Subscriber Identity ).

Preferably, when the first user mobility control management entity changes the state of the IDP identifier of the UE that is saved by itself from the cleared state to the set state, the first user mobility control management entity sends the user terminal context to the second user mobility control management entity. Status request message.

Specifically, when the second user mobility control management entity is an SGSN, the UE identity carried in the user terminal context status request message may also be a packet temporary mobile subscriber identity (P-TMSI, Packet Temporary Mobile Station Identity) and a routing area identifier. A combination of a RAI (Routing Area Identity); if the second user mobility control management entity is an MME, the UE Identity may also be a Globally Unique Temporary Identity (GUTI).

If the ISR function of the UE is activated, the first user mobility control management entity and the second user mobility control management entity maintain control (plane) of the GPRS tunneling protocol (GTP, GPRS Tunneling Protocol) established between the two for the UE (GTP) -C, GTP Control) connection, then the UE Identity is optional, otherwise, the UE Identity is required.

The user terminal context status request message sent by the first user mobility control management entity is used to notify the second user mobility control management entity that the UE is saved in the first user mobility control management entity.

The status of the IDP identifier is the setting status. After receiving the message, the second user mobility control management entity responds to the first user mobility control management entity with a UE Context Status Response message, including the UE saved in the second user mobility control management entity. The status of the IDP ID, either the set status or the cleared status.

In summary, the first user mobility control management entity requests to know the state of the IDP identifier of the UE saved in the second user mobility control management entity by using the UE Context Status Request message sent by the second user mobility control management entity; The user mobility control management entity learns from the UE Context Status Response message sent by the second user mobility control management entity that the status of the IDP identifier of the UE saved in the second user mobility control management entity is a set state or a cleared state. The second user mobility control management entity learns, according to the UE Context Status Request message received from the first user mobility control management entity, that the state of the IDP identifier of the UE saved in the first user mobility control management entity is a set state, and the query Whether the state of the IDP identifier of the UE stored by itself is a set state or a cleared state. According to the method, the two user mobility control management entities of the UE can know whether the state of the IDP identifier of the same UE saved by the other party is the set state by using the user terminal context state request process between the two.

When the first user mobility control management entity obtains the status of the IDP identifier of the UE saved by the second user mobility control management entity, if the state of the IDP identifier of the UE saved by the second user mobility control management entity is the set state, then A user mobility control management entity immediately does not explicitly attach the UE; likewise, when the second user mobility control management entity receives the UE Context Status Request message sent by the first user mobility control management entity, if the first user mobility control is known If the status of the IDP identifier of the UE saved by the management entity is the set state, the status of the IDP identifier of the UE saved by the UE is queried, and if the state of the IDP identifier of the UE that is saved by itself is also set, the non-definite attachment is also immediately performed. This UE.

The embodiment of the present invention emphasizes "immediately" because the user mobility control management entity sets the state of the IDP identifier of a certain UE to the set state, and may subsequently set the state of the IDP identifier of the UE to the cleared state (due to the UE). Reverting to the reachable state), therefore, in the case that both user mobility control management entities set the state of the IDP identifier of the UE to the set state, the two user mobility control management entities can not explicitly attach the UE separately. Therefore, one user mobility control management entity is prevented from setting the state of the IDP identifier of the UE to the clear state, and at this time, another user mobility control management entity performs an operation of non-clearly detaching the UE.

Therefore, regarding the same UE, if the state of the IDP identifier of the UE saved in one of the first user mobility control management entity and the second user mobility control management entity is the cleared state, the first user mobility control management entity and the first The two user mobility control management entity does not perform any specific processing for the UE.

For example, referring to FIG. 3, after the ISR function of the UE is activated, the process of the non-clearly detaching the UE initiated by the SGSN and the MME includes: Step 1: When the ISR function of the UE is activated, the MME or the SGSN that has entered the idle state sets the state of the IDP identifier of the UE that is saved by itself to the set state, and queries the state of the IDP identifier of the UE that is saved by the other party.

Step 2: When the MME and the SGSN know that the state of the IDP identifier of the UE saved by the other party is the set state, the MME and the SGSN respectively initiate a process of explicitly de-attaching the UE. Specifically, the following two steps are included: Step 2a: The SGSN learns that the ISR function of the UE is activated according to the context of the UE, and the status of the IDP identifier of the UE is set. If the SGSN further knows that the MME also The state of the IDP identifier of the UE is set to the set state, and the SGSN immediately initiates a process of not explicitly attaching the UE.

Step 2b: The MME learns that the ISR function of the UE is activated according to the Context of the UE, and the status of the IDP identifier of the UE is set. If the MME further knows that the SGSN also sets the status of the IDP identifier of the UE to the setting. State, the MME immediately initiates a process that does not explicitly detach the UE.

It should be noted that, the precondition of the first user mobility control management entity querying the second user mobility control management entity for the status of the IDP identifier of the UE is the IDP identifier of the UE saved in the first user mobility control management entity. The state is a set state. Preferably, the state of the IDP identifier of the UE saved in the first user mobility control management entity is set from the clear state to the set state, and the first user mobility control management entity is to the second user. The mobility control management entity queries the status of the IDP identifier of the UE, that is, sends a user terminal context status request message to the second user mobility control management entity. If the second user mobility control management entity does not set the IDP identifier of the UE, the user terminal context status response message returned by the second user mobility control management entity to the first user mobility control management entity includes indicating the second user The information of the IDP identifier is not set for the UE in the mobility control management entity. Thereafter, if the second user mobility control management entity sets an IDP identifier for the UE, and the state of the IDP identifier of the UE is the set state, the second user mobility control management entity queries the first user mobility control management entity to save the The status of the IDP identifier of the UE, if the status of the IDP identifier of the UE saved in the first user mobility control management entity is still set (according to TS 23.401 v8.2.0, if the UE and the first user move control The management entity establishes a signaling connection, and the first user mobility control management entity sets the state of the IDP identifier of the UE that is saved by itself to the cleared state, that is, sets the IDP of a certain UE in a user mobility control management entity. After the status of the identifier is the set state, it is also possible to set the state of the IDP identifier of the UE to the clear state, and the first user mobility control management entity and the second user mobility control management entity immediately initiate non-specific de-attachment of the UE. process.

The system and apparatus provided by the embodiments of the present invention are described below.

Referring to FIG. 4, an embodiment of the present invention provides a communication system, where the ISR function of the UE is activated, the system includes: a first user mobility control management entity 41 of the RAT registered by the UE, and another The second user of the RAT moves to manage the entity 42.

The first user mobility control management entity 41 is configured to learn the IDP identifier of the UE saved in the second user mobility control management entity 42 by the user terminal context state request procedure performed between the second user mobility control management entity 42. And; when it is determined that the state of the IDP identifier of the UE saved in the second user mobility control management entity 42 is the set state, the UE is not explicitly attached.

The second user mobility control management entity 42 is configured to learn, by using the user terminal context state request procedure between the first user mobility control management entity 41, the IDP identifier of the UE saved in the first user mobility control management entity 41. And; when it is determined that the state of the IDP identifier of the UE saved in the first user mobility control management entity 41 is the set state, the UE is not explicitly attached.

Referring to FIG. 5, an embodiment of the present invention provides a user mobility control management apparatus 50, which is applied to a user mobility control management entity of a RAT registered by a UE, where the ISR function of the UE is activated, and the user mobility control is performed. The management device 50 includes:

The setting unit 501 is configured to set and save a state of the UE that allows the non-definitely detached IDP identifier; the information interaction unit 502 is configured to learn, by the user terminal context state request process, the user mobility control management of another RAT registered by the UE. Whether the state of the IDP identifier of the UE saved in the entity is a set state or a clear state;

a non-explanatory detachment unit 503 for determining the setting unit 501 and the another RAT When the state of the IDP identifier of the UE saved in the user mobility control management entity is the set state, the UE is not explicitly attached.

When the state of the IDP identifier of the UE saved in the setting unit 501 is the set state, the information interaction unit 502 transmits a user terminal context state request message to the user mobility control management entity of the other RAT, and receives the other The user terminal context status response message returned by the user mobility control management entity of the RAT, from which the status of the IDP identifier of the UE saved in the user mobility control management entity of the other RAT is known.

Preferably, when the setting unit 501 modifies the state of the IDP of the UE that is saved by itself from the cleared state to the set state, the information interaction unit 502 sends the user terminal context state request message to the user mobility control management entity of the another RAT. .

When receiving the user terminal context status request message sent by the user mobility control management entity of another RAT, the information interaction unit 502 queries the status of the IDP identifier of the UE saved in the setting unit 501 according to the message, and queries the UE. The status of the IDP identifier is notified to the user mobility control management entity of the other RAT through the user terminal context status response message.

The information interaction unit 502 determines, according to the user terminal context status request message sent by the user mobility control management entity of the another RAT, that the status of the IDP identifier of the same UE saved in the user mobility control management entity of the another RAT is Set the status.

In summary, the embodiment of the present invention provides a specific implementation process of how the MME and the SGSN know the state of the IDP identifier of the same UE that is saved by the peer, that is, the MME and the SGSN learn through the user terminal context state request process query between each other. The state of the IDP identifier of the UE that is saved by the other party, so that when the MME and the SGSN set the state of the IDP identifier of the same UE to the set state, the MME and the SGSN respectively initiate a process of non-specifically detaching the UE. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

A method for attaching a user terminal, the method comprising:

In the case that the idle state signaling optimization ISR function of the user terminal is activated, the first user mobility control management entity of one type of wireless access registered by the user terminal and the second user mobility control management of another type of wireless access An entity, by using a user terminal context state request process, knowing a state of the non-definitely detached IDP identifier of the user terminal saved in the peer entity;

When it is determined that the states of the IDP identifiers of the user terminals saved in the first user mobility control management entity and the second user mobility control management entity are all in a set state, the first user mobility control management entity and the The second user mobility control management entity does not explicitly attach the user terminal.

The method according to claim 1, wherein the first user mobility control management entity learns, by the user terminal context state request process, the user terminal saved in the second user mobility control management entity. The steps of the status of the IDP identification include:

When the state of the IDP identifier of the user terminal saved in the first user mobility control management entity is a set state, the first user mobility control management entity sends a user terminal context to the second user mobility control management entity. Status request message

The second user mobility control management entity receives the user terminal context state request message, and searches for the state of the IDP identifier of the user terminal that is saved by itself;

The second user mobility control management entity sends a user terminal context status response message to the first user mobility control management entity, where the IDP identifier of the user terminal saved in the second user mobility control management entity is carried status.

The method according to claim 2, wherein when the first user mobility control management entity modifies the state of the IDP identifier of the user terminal saved by itself from a cleared state to a set state, the A user mobility control management entity sends a user terminal context status request message to the second user mobility control management entity.

4. The method according to claim 2, wherein the user terminal context state The request message includes a user identifier of the user terminal, and the second user mobility control management entity searches for the state of the IDP identifier of the user terminal that is saved by itself according to the user identifier of the user terminal.

The method according to claim 4, wherein the user identifier is an International Mobile Subscriber Identity IMSI, or a combination of a Packet Temporary Mobile Subscriber Identity P-TMSI and a Routing Area Identity RAI, or a Globally Unique Temporary Identity GUTI.

The method according to claim 2, wherein the second user mobility control management entity learns according to the received user terminal context status request message sent by the first user mobility control management entity. The state of the IDP identifier of the user terminal saved in the first user mobility control management entity is a set state.

The method according to claim 6, wherein when the second user mobility control management entity finds that the state of the IDP identifier of the user terminal saved by itself is a set state, the second user After the mobile control management entity sends the user terminal context status response message to the first user mobility control management entity, a process of explicitly de-attaching the user terminal is initiated.

A communication system, which is applied to an idle state signaling optimization of an ISR function of a user terminal, wherein the system comprises: a first user mobility control of a wireless access type registered by the user terminal a management entity (41) and a second user mobility control management entity (42) of another type of wireless access;

The first user mobility control management entity (41) is configured to learn, by using a user terminal context state request process, a status of an IDP identifier of the user terminal saved in the second user mobility control management entity (42); When it is determined that the state of the IDP identifier of the user terminal saved in the second user mobility control management entity (42) is a set state, the user terminal is not explicitly detached;

The second user mobility control management entity (42) is configured to learn, by using a user terminal context state request process, a status of an IDP identifier of the user terminal saved in the first user mobility control management entity (41); When it is determined that the state of the IDP identifier of the user terminal saved in the first user mobility control management entity (41) is the set state, the non-definite attachment is not performed. User terminal.

9. A user mobility control management device (50), which is applied to idle state signaling of a user terminal. In the case of optimizing ISR function activation, the device includes:

a setting unit (501), configured to set and save a state of the user terminal that allows a non-clearly detached IDP identifier;

An information interaction unit (502), configured to learn, by using a user terminal context state request process, a state of an IDP identifier of the user terminal saved in a user mobility control management entity of another wireless access type registered by the user terminal;

a non-definite detachment unit (503) for determining that the state of the IDP identifier of the user terminal saved in the user mobility control management entity of the setting unit (501) and the another wireless access type is When the state is set, the user terminal is not explicitly attached.

The device according to claim 9, wherein when the state of the IDP identifier of the user terminal saved in the setting unit (501) is a set state, the information interaction unit

(502) transmitting a user terminal context status request message to the user mobility control management entity of the another radio access type, and receiving a user terminal context status returned by the user mobility control management entity of the another radio access type And responding to the message, the state of the IDP identifier of the user terminal saved in the user mobility control management entity of the another radio access type is known.

The device according to claim 10, wherein when the setting unit (501) modifies the state of the IDP identifier of the user terminal saved by itself from the cleared state to the set state, the information interaction unit (502) transmitting a user terminal context status request message to the user mobility control management entity of the other radio access type.

The device according to claim 9, wherein the information interaction unit (502) receives the user terminal context status request message sent by the user mobility control management entity of the another wireless access type. And querying, according to the message, the status of the IDP identifier of the user terminal saved in the setting unit (501), and notifying the status of the IDP identifier of the queried user terminal to the another by using a user terminal context status response message. User mobility control management entity of the wireless access type. The apparatus according to claim 12, wherein the information interaction unit (502) determines the location of the user terminal context status request message sent by the user mobility control management entity of the another wireless access type. The state of the IDP identifier of the user terminal saved in another user mobility control management entity is a set state.