WO2008113283A1

WO2008113283A1 - Signaling trace method and equipment

Info

Publication number: WO2008113283A1
Application number: PCT/CN2008/070451
Authority: WO
Inventors: Hongzhuo Zhang; Yong Qiu; Yiyun Wang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-03-19
Filing date: 2008-03-10
Publication date: 2008-09-25
Also published as: CN101272604A; CN101272604B

Abstract

A signaling tracing method and equipment which make signaling tracing could be performed continuously in different types of procedures are disclosed in the present invention. When a terminal moves between two CN equipments, if the terminal needs to be traced, the tracing control and configuration parameter of the terminal would be transmitted between the two CN equipments. The CN equipment could be a SGSN or a MME, and the transmission of the tracing control and configuration parameter could be occurred between two SGSNs, between two MMEs, or between a SGSN and a MME. In the interactive signaling procedure between the MME and the serving SAE, if the terminal related to the signaling procedure need to be traced, the MME transmits the tracing control and configuration parameter to the serving SAE gateway through the interface therebetween.

Description

Signaling tracking method and device

The present invention relates to the field of communications, and in particular to signaling tracking techniques. Background technique

The Universal Mobile Telecommunications System (UMTS) system uses a similar structure to the second generation mobile communication system, including the Radio Access Network ("RAN") and the core network (Core). Network, referred to as "CN"). The RAN is used to handle all wireless related functions, and the CN is used to handle all voice calls and data connections in the UMTS system and to implement switching and routing functions with external networks. The RAN, the CN, and the User Equipment ("UE") terminal are the UMTS systems, as shown in Figure 1.

The RAN in the UMTS system is the UMTS Terrestrial Radio Access Network (UTRAN), which contains one or several Radio Network Subsystems (RNSs). An RNS consists of a Radio Network Controller (RNC) and one or more Node Base Stations (NodeBs). The RNC is used to allocate and control the radio resources of the NodeB connected or associated with it. The NodeB completes the lub interface between the NodeB and the RNC, and the data stream conversion between the NodeB and the Uu interface between the terminals, and also participates in some radio resource management. The structure of UTRAN is shown in Figure 2.

With the continuous development of network technology, a new evolutionary network architecture is being researched to meet the application requirements of mobile networks in the next ten years or more, including System Architecture Evolution ("S ΑΕ") and The Long Term Evolution (LTE) of the access network, where the evolved access network is called E-UTRAN.

The evolved packet core network architecture is shown in Figure 3, including Mobility Management Entity (MME), User Plane Entity (UPE), and users between different access systems. Inter Access System Anchor (IASA) Three logical functional entities. The MME is responsible for mobility management of the control plane, including user context and mobility state management, assigning user temporary identity, etc., corresponding to the current general packet radio service ("GPRS") or the UMTS system internal service. Grouping The control plane part of the Serving GPRS Support Node (SGSN); the UPE is responsible for initiating paging for downlink data in idle state, managing and storing IP bearer parameters and intra-network routing information, etc., corresponding to current GPRS/UMTS The data plane part of the system internal SGSN and the Gateway GPRS Support Node (GGSN); the IS AS acts as the user plane anchor between different access systems. The Policy and Charging Rule Function ("PCRF") is used for policy control decisions and flow accounting control functions. A Home Subscriber Server (HSS) is used to store user subscription information.

At present, there are two methods for user tracking in the UMTS system, one is based on signaling tracking, and the other is tracking in management. The following describes the signaling-based tracking method in the UMTS system: The signaling-based tracking method usually refers to the service flow tracking of a certain terminal, and the service flow of the terminal may involve multiple network elements, which need to pass through the network system. An interface between each network element node to pass the tracking control parameters of a specified user. A typical signaling-based tracking method includes the following steps (for example, tracking home users on the home network):

1) Send a Trace Session Activation message to the HSS through an Element Management System (EMS). The user identification and tracking control and configuration parameters to be tracked are specified in the message.

2) The HSS saves the user ID to be tracked as well as the tracking control and configuration parameters.

3) The tracked user requests access to the network by sending an attach request message (Attach Request) to the SGSN; or the tracked user generates an Inter-SGSN RA Update procedure.

4) The SGSN sends an Update GPRS Location message to the HSS to update the location information of the user in the HSS.

5) The HSS checks if the user is tracked. If the user has been tracked, the HSS propagates the user's tracking control and configuration parameters to the SGSN by activating the MAP-Active Trace Mode message.

6) The SGSN saves the identity of the user to be tracked as well as tracking control and configuration parameters.

7) When the triggering event defined in the tracking control and configuration parameters of the tracked user occurs, the SGSN propagates the tracking control and configuration parameters of the user to the GGSN node and the RNC node through corresponding messages, and includes tracking control and transmission to the GGSN. The configuration parameter message can be the active packet data protocol. (Packet Data Protocol, referred to as "PDP") context message (Active PDP Context), or update PDP context message (Update PDP Context). The message sent to the RNC containing the tracking control and configuration parameters is the CN Invoke Trace message.

8) When the triggering event defined in the tracking control and configuration parameters of the tracked user occurs, the GGSN propagates the tracking control and configuration parameters of the user to the broadcast multicast service center through corresponding messages.

(Broadcast-Multicast Service Centre, referred to as "BM-SC").

9) When the tracked user has soft handoff, the service RNC needs to propagate the tracking control and configuration parameters of the tracked user to the drift RNC through the IUR-INVOKE-TRACE message.

10) When the tracked user has a service RNS relocation, the SGSN needs to propagate the tracking control and configuration parameter information of the tracked user to the target RNC through the CN Invoke Trace message after the resource allocation process is successfully completed.

The tracking control and configuration parameters of the tracked users propagating between different nodes include: user or device identification (IMSI or IMEI (SV) (M)); Trace reference number, uniquely identifies a trace (tracking) session ( Trace reference ( M)); Triggering events for SGSN(M) and GGSN(M)); tracking depth, divided into three levels: low, medium and high (Trace Depth for SGSN (M), GGSN (M) and RNC (M ) ); List of NE types to trace ( M ) ; List of interfaces for SGSN ( O ), GGSN ( O ) and / or RNC ( O ).

In the process of implementing the foregoing solution, the inventor of the present invention finds that when the tracked user occurs to migrate the service RNS across the SGSN, since the tracking control of the user and the propagation method of the configuration parameters from the source SGSN to the target SGSN are not provided, The problem that the tracked user may continue to track the tracked user after the service RNS migration across the SGSN occurs.

Moreover, the SAE includes an MME, an E-UTRAN, a Serving SAE Gateway (Serving SAE Gateway), and a Packet Data Network ("PDN") SAE gateway node (as shown in FIG. 4), and the current solution There is no user signaling tracking method in the SAE gateway node. In addition, the current scheme does not involve a signaling tracking method when a terminal switches, roams, or updates between E-UTRAN and UTRAN heterogeneous systems. Summary of the invention

The main technical problem to be solved by the embodiments of the present invention is to provide a signaling tracking method and device, so that signaling tracking can be continuously performed in various processes. To solve the above technical problem, an embodiment of the present invention provides a signaling tracking method, including the following steps:

During the migration process of the terminal from the first core network device to the second core network device, if the terminal needs to be tracked, the first core network device sends the tracking control and configuration parameters of the terminal to the second core network device;

The second core network device performs signaling tracking on the terminal according to the received tracking control and configuration parameters. An embodiment of the present invention further provides a core network device, including:

a determining unit, configured to determine, when the terminal migrates from the core network device to another core network device, whether the terminal needs to be tracked;

And a sending unit, configured to: when the determining unit determines that the tracking terminal is needed, send the tracking control and configuration parameters of the terminal to another core network device.

An embodiment of the present invention further provides a signaling tracking method, including the following steps:

In the signaling process in which the MME and the serving SAE gateway interact, if the terminal involved in the signaling process needs to be tracked, the MME sends the tracking control and configuration parameters of the terminal to the serving SAE gateway;

Service The SAE gateway tracks the terminal according to the received tracking control and configuration parameters.

An embodiment of the present invention further provides a mobility management entity device, including:

a determining unit, configured to determine, in the signaling process that the MME and the serving SAE gateway interact, whether to track the terminal involved in the signaling process;

And a sending unit, configured to: when the determining unit determines that the tracking terminal is needed, send the tracking control and configuration parameters of the terminal to the serving SAE gateway.

An embodiment of the present invention further provides a service SAE gateway device, including:

a receiving unit, configured to receive, by the MME, a tracking control and a configuration parameter of the terminal;

The tracking unit is configured to perform signaling tracking on the terminal according to the tracking control and configuration parameters received by the receiving unit.

Compared with the prior art, the main differences and effects of the embodiments of the present invention are as follows:

When the terminal migrates between two core network devices, if the terminal needs to be tracked, the tracking control and configuration parameters of the terminal are transmitted between the two core network devices. Therefore, the tracked terminal can continue to track after the migration of the SGSN or the MME, and the continuity of the tracking is ensured.

The MME transmits the tracking control and configuration parameters to the service through an interface with the serving SAE gateway. The SAE gateway can track the signaling of the terminal in the serving SAE gateway and expand the scope of signaling tracking. DRAWINGS

1 is a structural diagram of a UMTS system in the prior art;

2 is a schematic structural diagram of a UTRAN in the prior art;

3 is a schematic diagram of an evolved packet core network architecture in the prior art;

4 is a schematic diagram of a non-roaming architecture of a SAE system in the prior art;

FIG. 5 is a flowchart of a signaling tracking method according to a first embodiment of the present invention; FIG.

6 is a flowchart of a signaling tracking method according to a second embodiment of the present invention;

7 is a flowchart of a signaling tracking method according to a third embodiment of the present invention;

8 is a flowchart of a signaling tracking method according to a fourth embodiment of the present invention;

9 is a flowchart of a signaling tracking method according to a fifth embodiment of the present invention;

FIG. 10 is a flowchart of a signaling tracking method according to a sixth embodiment of the present invention; FIG.

11 is a flowchart of a signaling tracking method according to a seventh embodiment of the present invention;

Figure 12 is a structural diagram of a signaling tracking system in accordance with an eighth embodiment of the present invention. detailed description

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings.

A first embodiment of the present invention relates to a signaling tracking method. In this embodiment, a terminal switches over an SGSN, where a first core network device is an old SGSN, and a second core network device is a new SGSN. Show.

In step 501, the source RNC decides to initiate a migration process of the serving RNS.

Next, in step 502, the source RNC sends a Relocation Required message to the old SGSN.

Next, in step 503, the old SGSN determines that it is a migration procedure of the serving RNS across the SGSN, and therefore, forwards the migration request message to the new SGSN. Moreover, the old SGSN determines whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal that needs to be migrated, and if necessary, adds the tracking control and configuration parameters of the terminal to the forwarded migration request message. If you need to migrate The terminal does not need to be tracked, and the migration process of the service RNS of the terminal is exactly the same as the migration process in the prior art. In this embodiment, the terminal that needs to be migrated needs to be tracked, and the old SGSN adds the tracking control and configuration parameters of the terminal to the forwarded migration request message. Since the original signaling is utilized in this step to carry the tracking control and configuration parameters, no additional signaling is required.

Next, in step 504, the new SGSN sends a Relocation Request message to the target RNC. A radio access bearer is established between the target RNC and the new SGSN.

Next, in step 505, after all necessary resource reservations are successful, the target RNC sends a Relocation Request Acknowledge message to the new SGSN.

Next, in step 506, after receiving the migration request acknowledgement message, the new SGSN sends a CN Invoke Trace message to the target RNC, where the message includes the tracking control and management parameters of the terminal. The target RNC performs signaling tracking on the terminal according to the received tracking control and configuration parameters.

Next, in step 507, the new SGSN sends a Forward Relocation Response (Forward Relocation Response) message to the old SGSN.

Next, in step 508, the old SGSN sends a Relocation Command message to the source RNC.

Next, in step 509, the source RNC forwards the data to the target RNC.

Next, in step 510, the source RNC sends a Radio Resource Control (RRC) message to the terminal to command the terminal to start the handover. After the terminal accesses the target cell, it also needs to send an RRC message to the target RNC, as in step 510'.

In step 511, the source RNC sends a serving RNS context to the target RNC through the old SGSN, the new SGSN. Specifically, the source RNC sends the serving RNS context to the old SGSN through the "Forward SRNS Context" message, and the old SGSN forwards the received service RNS context to the new SGSN through the "Forward SRNS Context" message. . After receiving the service RNS context, the new SGSN returns a response message to the old SGSN, and sends the service RNS context to the target RNC through a "Forward SRNS Context" message.

Next, in step 512, the target RNC sends a Relocation Detect message to the new SGSN to detect the terminal that needs to be migrated.

Next, in step 513, the target RNC sends a Relocation Complete message to the new SGSN.

Next, in step 514, the new SGSN forwards the migration complete message to the old SGSN, the old SGSN. After receiving the migration completion message, a response message is returned to the new SGSN.

Next, in step 515, the new SGSN sends an Update PDP Context Request message to the GGSN, requesting the GGSN to perform a user plane handover. After completing the user plane handover, the GGSN returns an Update PDP Context Response message to the new SGSN.

In step 516, the old SGSN sends an Iu Release Command (Iu Release Command) message to the source RNC, requesting the source RNC to release the resources of the terminal. After releasing the resources of the terminal, the source RNC returns an Iu release complete message to the old SGSN.

Next, in step 517, the terminal initiates an update process of a Route Area ("RA").

It can be seen that in the present embodiment, the tracked terminal can continue tracking after the migration of the SGSN, and the continuity of the tracking is ensured. Moreover, after the tracking control and configuration parameters of the terminal are transmitted to the new SGSN, the SGSN sends the tracking control and configuration parameters to the relevant RNC in the corresponding access network, so that the pair can also remain in the new access network. Tracking of the terminal.

A second embodiment of the present invention relates to a signaling tracking method. In this embodiment, a terminal switches over an MME, where a first core network device is an old MME, and a second core network device is a new MME. Show.

In step 601, the establishment of the IP bearer service through the serving SAE gateway 1 is completed between the terminal and the PDN SAE gateway.

Next, in step 602, the source eNB (evolved base station node), eNB1, decides to initiate handover to the target eNB, eNB2.

Next, in step 603, the eNB1 sends a Handover Required message to the source MME (ie, MME1), where the message carries the eNB context of the terminal and the identifier of the eNB2.

Next, in step 604, the MME1 selects the MME2 as the target MME that provides the service for the eNB2, and sends a Handover Preparation Request message to the MME2, where the message includes the context information of the terminal. In this step, the MME1 also needs to determine whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal that needs to be switched. If necessary, the tracking control and configuration parameters of the terminal are added to the handover preparation request message. If the terminal that needs to be handed over does not need to be tracked, the cross-MME handover procedure of the terminal is exactly the same as the cross-MME handover procedure in the prior art. In this embodiment, the terminal that needs to be handed over needs to be tracked, so the MME1 adds the tracking control and configuration parameters of the terminal to the handover preparation request message. As in this step The original signaling is utilized to carry tracking control and configuration parameters, so no additional signaling is required. Next, in step 604, the MME2 creates a context of the terminal, and sends a handover preparation request message to the serving SAE gateway 2, where the message carries the eNB2 address and the session management (SMS) context of the terminal. . The serving SAE gateway 2 returns a response message to the handover preparation request to the MME2.

Next, in step 605, the MME2 sends a handover preparation request message to the eNB2, where the message carries the eNB context information of the terminal and the tracking control and configuration parameters of the terminal. The eNB2 performs signaling tracking on the terminal according to the received tracking control and configuration parameters. The eNB 2 transmits a Handover Preparation Confirm message to the MME 2. The bearer plane establishment of eNB2 and serving SAE gateway 2 is completed.

Another implementation manner is that the tracking control and configuration parameters of the terminal are not included in step 605, but in the next step 606, after receiving the handover preparation confirmation message, the MME2 sends a CN-triggered tracking message (such as CN) to the eNB2. Invoke Trace ), the message contains the tracking control and configuration parameters of the terminal. The eNB2 performs signaling tracking on the terminal according to the received tracking control and configuration parameters.

If the tracking control and configuration parameters of the terminal are carried in the message of step 605, then step 606 is not required. If step 606 is to be used, the tracking control and configuration parameters of the terminal cannot be carried in the message of step 605.

Next, in step 607, the MME 2 transmits a handover preparation acknowledgement message to the MME 1, and the MME 1 notifies the serving SAE gateway 1 to perform the migration.

Next, in step 608, the serving SAE gateway 1 forwards the data to the serving SAE gateway 2, and uses the necessary methods to reduce data loss.

Next, in step 609, the MME 1 transmits a Handover Command message to the eNB1.

Next, in step 610, the eNB2 detects the terminal and establishes a radio bearer.

Next, in step 611, the eNB2 sends a handover complete message to the MME2, and the MME2 notifies the serving SAE gateway 2 that the handover has been completed.

Next, in step 612, a routing update is performed between the serving SAE gateway 2 and the PDN SAE gateway, that is, the serving SAE gateway 2 sends a routing update/bearing request to the PDN SAE gateway, and the PDN SAE gateway returns a response to the serving SAE gateway 2.

Next, in step 613, the serving SAE gateway 2 notifies the MME 2 that the handover is complete, and the MME 2 notifies MME1 releases resources.

Next, in step 614, the resources of the terminal in the source system are released. That is, the MME notifies the eNB1 that the handover is complete, releases the resource in the eNB1, and notifies the serving SAE gateway 1 to release the resource.

Next, in step 615, the establishment of the IP ^^ service of the service SAE gateway 2 between the terminal and the PDN SAE gateway is completed.

It can be seen that in the present embodiment, after the tracked terminal crosses the MME, the tracking can be continued, and the continuity of the tracking is ensured. Moreover, after the tracking control and configuration parameters of the terminal are transmitted to the new MME, the MME sends the tracking control and configuration parameters to the relevant eNB2 in the corresponding access network, so that the pair can also remain in the new access network. Tracking of the terminal.

A third embodiment of the present invention relates to a signaling tracking method. In this embodiment, in a signaling flow in which an MME and a serving SAE gateway interact, if the terminal involved in the signaling flow needs to be tracked, the MME The tracking control and configuration parameters of the terminal are sent to the serving SAE gateway, and the serving SAE gateway performs signaling tracking on the terminal according to the received tracking control and configuration parameters. In this embodiment, the process of attaching the terminal in the SAE system is described as an example. The specific process is shown in FIG. 7 .

In step 701, the terminal sends an attach request message (Access Point Name, referred to as "ΑΡΝ") to the MME.

Next, in step 702, the MME and the HSS authenticate the terminal, and this step is an optional step. Next, in step 703, the location information of the terminal is updated to the HSS.

Next, in steps 704 and 705, the HSS inserts the subscription data of the terminal to the UI.响应 In response to the HSS insert data message.

Next, in step 706, the HSS responds to the terminal location update message.

Next, in step 707, the MN determines whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal that is saved by itself, and if necessary, carries the tracking control and configuration parameters of the terminal in the setup bearer request message, and sends the service to the service. SAE gateway. The setup bearer request message also needs to include information such as ΑΡΝ, user plane (UP) key, and the like. Since the original signaling is used to carry tracking control and configuration parameters, no additional signaling is required. Service The SAE gateway performs signaling tracking on the terminal according to the received tracking control and configuration parameters of the terminal.

Next, in steps 708 to 710, the serving SAE gateway sends a routing update/bearer request to the PDN SAE gateway; the PDN SAE gateway interacts with the PCRF entity; the PDN SAE gateway moves to the service The service SAE gateway replies with a route update/bearer acknowledgment message, and the serving SAE gateway sends a bearer setup response message to the MME, and the message carries the IP configuration information.

Then, in step 711 to step 713, the MME sends a radio bearer setup request message to the eNB, requesting the eNB to establish a radio bearer, where the request message carries information such as Quality of Service (QoS), RRC key, and the like; The eNB allocates radio resources and establishes a radio bearer with the terminal; the eNB sends a radio bearer setup response message to the MME. Steps 711 to 713 are optional steps.

In step 714, the MME sends a bearer setup confirmation message to the serving SAE gateway.

Next, in step 715 and step 716, the MME sends an attach accept message to the terminal, where the message carries IP configuration information, indicating that the terminal's attach request is accepted; the terminal sends an attach complete message to the MME, completing The attachment process of the terminal.

It is not difficult to find that, in this embodiment, the MME transmits the tracking control and configuration parameters to the serving SAE gateway of the terminal through the interface with the serving SAE gateway, so as to track the signaling of the terminal in the serving SAE gateway. The scope of signaling tracking has been expanded.

A fourth embodiment of the present invention relates to a signaling tracking method. In this embodiment, a terminal switches from a 2G (second generation mobile communication system) / 3G (third generation mobile communication system) network to an evolved network, that is, The first core network device is an MME, and the second core network device is an MME, and the first core network device and the second core network device are devices in different core networks. The specific process is shown in Figure 8.

In step 801, the establishment of the IP bearer service between the terminal and the serving SAE gateway through the 2G/3G access network and the SGSN is completed.

Next, in step 802, the 2G/3G access network decides to initiate a handover procedure to the LTE access network. Next, in step 803, the 2G/3G access network sends a Handover Required message to the SGSN, and the SGSN selects the target MME to be handed over.

Next, in step 804, the SGSN determines whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal that is saved by itself, and if necessary, carries the tracking control and configuration parameters of the terminal in a Handover Preparation Request message. , sent to the selected MME; if the terminal does not need to be tracked, the handover procedure is exactly the same as the prior art. In this embodiment, the terminal needs to be tracked, and the SGSN carries the tracking control and configuration parameters of the terminal in the handover preparation request message, and sends the message to the MME. Since the original signaling is used to carry tracking control and configuration parameters, no additional signaling is required. After receiving the message, the MME forwards the message to the LTE access network, requesting the LTE access network to reserve resources. The LTE access network performs signaling tracking on the terminal according to the tracking control and configuration parameters in the message.

Next, in step 805, the LTE access network reserves a user plane (UP) resource to establish a user plane context for the terminal.

Next, in step 806, the LTE access network sends a handover preparation acknowledgement message to the MME, and the MME forwards the message to the SGSN.

In step 804, a route parameter is transmitted to the LTE access network. The route parameter is not transmitted in step 804. Instead, a step is added after step 806, and the MME sends the trace parameter to the LTE access through the CN INVOKE TRACE message. network.

Next, in step 807, the SGSN sends a handover command message to the terminal through the 2G/3G access network.

Next, in step 808, data is transmitted between devices on the network side by means of bi-cast or data forwarding to reduce data loss.

Next, in step 809, the LTE access network detects the access of the terminal.

Next, in step 810, the LTE access network sends a handover complete message to the MME, and the MME forwards the message to the SGSN.

Next, in step 811, the SGSN returns a handover complete response message to the MME.

Next, in step 812, the serving SAE gateway switches the user plane path to the LTE access network. Next, in step 813, the SGSN instructs the 2G/3G access network to release resources.

Next, in step 814, the establishment of the 1P 7-carrier service through the LTE access network between the terminal and the serving SAE gateway is completed.

Next, in step 815, the terminal updates the location information by using a Tracking Area Update Procedure.

Therefore, in this embodiment, after the core network device of the tracked terminal switches from the SGSN to the MME, the tracking can be continued, and the continuity of the tracking is ensured. Moreover, after the tracking control and configuration parameters of the terminal are transmitted to the MME, the MME sends the tracking control and configuration parameters to the corresponding access network, so that the tracking of the terminal can also be maintained in the new access network. .

A fifth embodiment of the present invention relates to a signaling tracking method. In this embodiment, a terminal switches from an evolved network to a 2G/3G network, that is, the first core network device is an MME, and the second core network is used. The device is an SGSN, and the first core network device and the second core network device are devices in different core networks. The specific process is shown in Figure 9.

In step 901, the establishment of an IP bearer service through the LTE access network between the terminal and the serving SAE gateway is completed.

Next, in step 902, the LTE access network decides to initiate a handover procedure to the 2G/3G access network. Next, in step 903, the LTE access network sends a handover request message to the MME, and the MME selects the target SGSN to be handed over.

Then, in step 904, the MME determines whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal that is saved by itself, and if necessary, carries the tracking control and configuration parameters of the terminal in the handover preparation request message, and sends the selection to the selection. SGSN; If the terminal does not need to be tracked, the handover procedure is identical to the prior art. In this embodiment, the terminal needs to be tracked, and the MME carries the tracking control and configuration parameters of the terminal in the handover preparation request message, and sends the message to the SGSN. Since the original signaling is utilized to carry tracking control and configuration parameters, no additional signaling is required.

After receiving the message, the SGSN forwards the message to the 2G/3G access network and requests the 2G/3G access network to reserve resources. The 2G/3G access network performs signaling tracking on the terminal according to the tracking control and configuration parameters in the message.

Next, in step 905, the 2G/3G access network reserves user plane resources to establish a user plane context for the terminal.

Next, in step 906, the 2G/3G access network sends a handover preparation acknowledgement message to the SGSN, and the SGSN forwards the message to the MME.

Next, in step 907, the MME sends a handover command message to the terminal through the LTE access network. Next, in step 908, data is transmitted between devices on the network side by means of bi-cast or data forwarding to reduce data loss.

Next, in step 909, the 2G/3G access network detects the access of the terminal.

Next, in step 910, the 2G/3G access network sends a handover complete message to the SGSN, and the SGSN forwards the message to the MME.

Next, in step 911, the MME returns a handover complete response message to the SGSN.

Next, in step 912, the serving SAE gateway switches the user plane path to the SGSN access network. Then, in step 913 to step 915, the MME instructs the LTE access network to release the resource; completes establishment of the IP bearer service between the terminal and the serving SAE gateway through the 2G/3G access network and the SGSN; The terminal updates the location information by tracking the area update process.

Therefore, in this embodiment, after the core network device of the tracked terminal switches from the MME to the SGSN, the tracking can be continued, and the continuity of the tracking is ensured. Moreover, after the tracking control and configuration parameters of the terminal are transmitted to the SGSN, the SGSN sends the tracking control and configuration parameters to the corresponding access network, so that the tracking of the terminal can also be maintained in the new access network. .

A sixth embodiment of the present invention relates to a signaling tracking method. In this embodiment, a terminal is attached to a UMTS, and a radio access technology (Radio Access Technology, referred to as "RAT") is converted into an LTE network. Therefore, the first core network The device is an SGSN and the second core network device is an MME. The specific process is shown in Figure 10.

In step 1001, the terminal sends a network attach request to the SGSN.

Next, in step 1002, the SGSN initiates an authentication process for the terminal.

Next, in step 1003, the SGSN registers with the HSS, and the HSS replies to the SGSN with a registration confirmation message.

Next, in step 1004, the SGSN sends an attach accept message to the terminal, accepting the network attach request of the terminal. The message carries the Temperate Mobile Subscription Identity (TMSI) of the terminal and the Routing Area (RA).

Next, in step 1005, the terminal initiates an Active PDP Context flow.

After the RAT is changed to the LTE network, the process proceeds to step 1006. The terminal selects the LTE access network and sends a RA Update message to the MME/UPE, where the message carries the TMSI and the routing area of the terminal.

Next, in step 1007, the MME/UPE requests the SGSN for the context of the terminal through the SGSN Context Request message. The SGSN sends the context of the terminal to the MME/UPE through the SGSN Context Response message, and the SGSN determines whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal saved by the SGSN, and if necessary, the terminal The tracking control and configuration parameters are added to the SGSN Context Response message and sent to the MME/UPE. If the terminal does not need to be tracked, it is the same as the prior art. In this embodiment, the terminal needs to be tracked, and the SGSN adds the tracking control and configuration parameters of the terminal to the SGSN context response message, and sends the MME/UPE to the MME/UPE. The SGSN context response message also needs to include the TMSI of the terminal. Mobility tube Information such as keys in the context of Mobility Management ("MM"). Since the original signaling is utilized in this step to carry the tracking control and configuration parameters, no additional signaling is required.

Next, in step 1008, the MME/UPE authenticates the terminal, and this step is an optional step. Next, in step 1009, the MME/UPE sends an SGSN Context Acknowledgement message to the SGSN. Next, in step 1010, the MME registers with the HSS, and the HSS sends a registration confirmation to the MME, indicating that the registration is completed.

Next, in step 1011 and step 1012, the MME/UPE sends a routing area update accept message to the terminal; the terminal returns a routing area update complete message to the MME/UPE to complete the routing area update procedure.

After the RAT transition occurs again, that is, after the RAT is changed to the 2G/3G access network, the process proceeds to step 1013, where the terminal sends a routing area update request to the SGSN, and carries the relevant information in the request.

Next, in step 1014, the SGSN sends a message requesting the terminal context to the MME/UPE.

The MME/UPE sends the context of the terminal to the SGSN through the SGSN Context Response message, and the MME/UP also needs to determine whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal that is saved by itself, and if necessary, The tracking control and configuration parameters of the terminal are added to the SGSN context response message and sent to the SGSN. If the terminal does not need to be tracked, it is the same as the prior art. This step is similar to step 1007 and will not be described here.

Next, in step 1015, the SGSN registers with the HSS, and the HSS returns a registration confirmation to the SGSN. Next, in step 1016, the SGSN sends a routing area update accept message to the terminal to complete the update of the routing area.

It can be seen that in the present embodiment, when the tracked terminal is attached to the UMTS, and the RAT is changed, the tracking can be continued, and the continuity of the tracking is ensured.

A seventh embodiment of the present invention relates to a signaling tracking method. In this embodiment, a terminal is attached to an SAE and a RAT is converted into a 2G/3G network, so the first core network device is an MME, and the second core network device is an SGSN. . The specific process is shown in Figure 11.

In step 1101, the terminal sends a network attach request to the MME/UPE, where the request carries related information.

Next, in step 1102, the MME/UPE performs an authentication process with the terminal.

Next, in step 1103, the MME/UPE registers with the HSS, and the HSS replies to the MME/UPE with a registration confirmation message. Next, in step 1104, the MME/UPE sends an attach accept message to the terminal, and accepts the network attach request of the terminal. The message carries related information of the terminal.

After the RAT transitions to the 2G/3G network, the process proceeds to step 1105 and step 1106. Steps 1105 and 1106 are the same as steps 1013 and 1014, respectively, and are not described here. Thereafter, an authentication process can be performed between the SGSN and the terminal, as in step 1107.

Next, in step 1108, the SGSN registers with the HSS, and the HSS replies to the SGSN with a registration confirmation message.

Next, in step 1109, the SGSN returns an SGSN Context Acknowledgement message to the MME/UPE. Next, in step 1110 and step 1111, the SGSN sends an update PDP request message to the MME/UPE; the MME/UPE returns an update PDP response message to the SGSN.

Next, in step 1112, the SGSN sends a routing area update accept message to the terminal, and the terminal returns a routing area update complete message to the SGSN to complete the update of the routing area.

It can be seen that in the present embodiment, when the tracked terminal is attached to the SAE and the RAT is converted to the 2G/3G network, the tracking can be continued, and the continuity of the tracking is ensured.

It should be noted that, in the embodiment of the present invention, the MME and the UPE are used as an example in a physical device. If the MME and the UPE are separated from different physical devices, a corresponding signaling interaction needs to be performed between the MME and the UPE. The process will not be described here.

An eighth embodiment of the present invention relates to a core network device (such as an SGSN or an MME), including: a storage unit, configured to store tracking control and configuration parameters of the terminal; and a determining unit, configured to migrate from the core network device to the terminal In another core network device, determining whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal stored in the storage unit; and sending unit, configured to: when the determining unit determines that the terminal needs to be tracked, the terminal Tracking control and configuration parameters are sent to the other core network device.

The core network device further includes a receiving unit, configured to receive tracking control and configuration parameters from other core network devices, and a tracking unit, configured to perform signaling tracking on the terminal according to the tracking control and configuration parameters received by the receiving unit. Through the units included in the core network device, the tracked terminal may be migrated across the SGSN or the MME, or the migration between the SGSN and the MME may continue to be tracked to ensure the continuity of the tracking.

A ninth embodiment of the present invention relates to a signaling tracking system, as shown in FIG. 12, including an MME device and a serving SAE gateway device. The MME device includes: a storage unit, configured to store tracking control and configuration parameters of the terminal; and a determining unit, configured to be used in a signaling process in which the MME and the serving SAE gateway interact (such as an attach procedure of the terminal in the SAE system;) Determining whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal stored in the storage unit; and sending, configured to send the tracking control and configuration parameters of the terminal when the determining unit determines that the terminal needs to be tracked Go to the service SAE gateway device.

The serving SAE gateway device includes a receiving unit, configured to receive tracking control and configuration parameters of the terminal from the MME device, and a tracking unit, configured to perform signaling tracking on the terminal according to the tracking control and configuration parameters received by the receiving unit. The tracking of the signaling of the terminal can be performed within the serving SAE gateway, which expands the scope of signaling tracking.

In summary, in the embodiment of the present invention, when the terminal migrates between two core network devices, if the terminal needs to be tracked, the tracking control and configuration parameters of the terminal are transmitted between the two core network devices. . Therefore, the tracked terminal can continue to track after the migration of the SGSN or the MME, and the continuity of the tracking is ensured.

The core network device may be an SGSN or an MME, and the transmission of the tracking control and configuration parameters may occur between the two SGSNs, between the two MMEs, or between the SGSN and the MME, so that the terminal is between the UMTS and the SAE. Tracking can still be continued while migrating.

Carrying tracking control and configuration parameters in the migration request message, handover preparation request message, or SGSN context response message can carry the tracking control and configuration parameters with the original signaling, without adding additional signaling.

After the tracking control and configuration parameters are transmitted to the new core network device, the core network device can send the tracking control and configuration parameters to the relevant RNC or eNodeB in the corresponding access network, thereby maintaining the new access network. Tracking of the corresponding terminal.

The MME transmits the tracking control and configuration parameters to the serving SAE gateway through the interface with the serving SAE gateway, so that the signaling of the terminal in the serving SAE gateway can be tracked, and the scope of the signaling tracking is expanded.

In the signaling process in which the MME and the serving SAE gateway interact, such as the attach procedure of the terminal in the SAE system, the tracking control and configuration parameters are transmitted to the serving SAE gateway, and the original signaling can be used to carry the tracking control and configuration parameters, and Additional signaling is required.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary hardware platform, and of course, can also be implemented entirely by hardware. Based on such understanding, all or part of the technical solution of the present invention contributing to the background art may be embodied in the form of a software product, which may be stored in a storage medium, such as

ROM/RAM, diskette, optical disk, etc., comprising instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments or portions of the embodiments of the present invention. .

While the invention has been illustrated and described with reference to the preferred embodiments embodiments The spirit and scope of the invention.

Claims

Rights request

A signaling tracking method, comprising the steps of:

The second core network device performs signaling tracking on the terminal according to the received tracking control and configuration parameters.

The signaling tracking method according to claim 1, wherein the migration process of the terminal from the first core network device to the second core network device is one of the following:

a handover procedure of the terminal from the first serving general packet radio service support node SGSN to the second SGSN; or

a handover procedure of the terminal from the first mobility management entity MME to the second MME; or a handover procedure of the terminal from the SGSN to the MME; or

The handover process of the terminal from the MME to the SGSN; or

The terminal is attached to the universal mobile communication system UMTS and the radio access technology RAT is converted into a process of long-term evolution of the LTE network, wherein the first core network device is an SGSN, and the second core network device is an MME; or

The terminal is attached to the process of the system architecture evolution SAE system and the RAT is converted into a 2G/3G network, where the first core network device is an MME, and the second core network device is an SGSN.

The signaling tracking method according to claim 2, wherein in the handover process of the terminal from the first SGSN to the second SGSN, the first SGSN carries the tracking control and configuration parameters of the terminal in The migration request message is sent to the second SGSN; or

In the process of the handover of the terminal from the first MME to the second MME, the first MME carries the tracking control and configuration parameters of the terminal in the handover preparation request message to the second MME; or

During the handover process of the terminal from the SGSN to the MME, the SGSN carries the tracking control and configuration parameters of the terminal in the handover preparation request message and sends the MME to the MME; or During the handover process of the terminal from the MME to the SGSN, the MME sends the tracking control and configuration parameters of the terminal to the SGSN in the handover preparation request message; or

In a process in which the terminal is attached to the UMTS and the RAT is converted into an LTE network, the SGSN as the first core network device carries the tracking control and configuration parameters of the terminal in the SGSN context response message and sends the message to the second core network. MME of the device; or,

In a process in which the terminal is attached to the SAE and the RAT is converted into a 2G/3G network, the MME as the first core network device carries the tracking control and configuration parameters of the terminal in the SGSN context response message and sends the message to the second The SGSN of the core network device.

The signaling tracking method according to claim 1, wherein the first core network device determines whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal saved by the first core network device.

The signaling tracking method according to claim 1, wherein the first core network device and the second core network device are different devices in the same core network, or devices in different core networks.

The signaling tracking method according to any one of claims 1 to 5, wherein after receiving the tracking control and configuration parameters, the second core network device sends the received tracking control and configuration parameters. a device for the terminal radio resource management in the access network corresponding to the second core network device; the device for the terminal radio resource management signaling the terminal according to the received tracking control and configuration parameters track.

The signaling tracking method according to claim 6, wherein the second core network device is an SGSN, and the device for the terminal radio resource management is a radio network controller RNC; or, the The second core network device is an MME, and the device for the terminal radio resource management is an evolved base station node.

8. A core network device, comprising:

a determining unit, configured to determine, when the terminal core network device migrates to another core network device, whether the terminal needs to be tracked;

a sending unit, configured to: when the determining unit determines that the terminal needs to be tracked, Trace control and configuration parameters are sent to the other core network device.

The core network device according to claim 8, further comprising:

a receiving unit, configured to receive tracking control and configuration parameters from other core network devices, and a tracking unit, configured to perform signaling tracking on the terminal according to the tracking control and configuration parameters received by the receiving unit.

10. The core network device according to claim 8, further comprising:

The storage unit is configured to save the tracking control and configuration parameters of the terminal; determine whether the terminal needs to be tracked.

The core network device according to any one of claims 8 to 10, wherein the core network device is an SGSN or an MME.

12. A signaling tracking method, comprising the steps of:

The service SAE gateway performs signaling on the terminal according to the received tracking control and configuration parameters.

The signaling tracking method according to claim 12, wherein the MME determines whether the terminal needs to be tracked according to the tracking control and configuration parameters of the terminal saved by the MME.

The signaling tracking method according to claim 12, wherein the MME carries the tracking control and configuration parameters of the terminal in a setup bearer request message and sends the message to the serving SAE gateway.

The signaling tracking method according to any one of claims 12 to 14, characterized in that The signaling flow MME and serving gateway S AE is the interaction occurs attachment procedure of the terminal system S AE _t

A mobile management entity device, comprising:

And a sending unit, configured to send the tracking control and configuration parameters of the terminal to the serving SAE gateway when the determining unit determines that the terminal needs to be tracked.

The mobile management entity device according to claim 16, further comprising: a storage unit, configured to save tracking control and configuration parameters of the terminal;

Control and configuration parameters Determine if the terminal needs to be tracked.

18. A service SAE gateway device, comprising:

And a tracking unit, configured to perform signaling tracking on the terminal according to the tracking control and configuration parameters received by the receiving unit.