WO2009036688A1

WO2009036688A1 - Method of notifying terminal redirection

Info

Publication number: WO2009036688A1
Application number: PCT/CN2008/072316
Authority: WO
Inventors: Longgui Huang; Zhiming Li; Qingrong He; Jixing Liu; Jie Zhao; Xin Zhong
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-09-14
Filing date: 2008-09-10
Publication date: 2009-03-26
Also published as: CN101389131A; CN101389131B

Abstract

A method of notifying terminal redirection is provided, which includes: a source AN triggers a target AN for sending a service redirecting message; the source AN receives the service redirecting message from the target AN, sends the service redirecting message to the terminal. A device for realizing the above method is also provided. Using the method and the device, accomplishment of network redirection only requires the target AN having IWS function, and doesn't require the source AN having IWS function, which simplifies the structure of source AN.

Description

Method and device for notifying terminal redirection

Technical field

The present invention relates to mobile communication network redirection, and in particular to a method and apparatus for informing a terminal to redirect.

Background technique

With the development of mobile communication technologies, various types of access networks have emerged, and the problem of redirection between different access networks has become a hot spot in communication research.

One method currently used is to use the Interoperability Solution (ISS) to perform redirection between access networks. That is, the target access network processes the message addressed to the terminal through the IWS function and sends it to the source. Into the network, and then sent to the terminal through the air interface of the source access network; thereby realizing the information exchange between the terminal and the target access network through the air interface of the source access network and the interface between the source access network and the target access network . In the prior art, in addition to the target access network needs to implement the IWS function, the source access network also needs to have the function of the IWS, which makes the system very complicated.

Now, the high-speed packet data (HR, High Rate Packet Data) access network (AN, Access Network) to code division multiple access (CDMA, Code Division Multiple Access) IX base station (BS, Base Station) redirection, for example, A drawback of the prior art.

At this time, the user can use the mobile station/access terminal (MS/AT, Mobile Station/Access).

Terminal) A dual mode terminal, where MS is a user terminal in a CDMA IX network, and the following CDMA IX network is referred to as an IX network, and AT is a user terminal in the HRPD network.

FIG. 1 is a schematic diagram of a network structure in which an IX network and an HRPD network interoperate in the prior art. As shown in Figure 1, the HRPD AN 101 and the IX BS 103 have IWS functions respectively, and the HRPD AN and the IX BS communicate with the A21 interface.

In order to cooperate with the MS/AT redirection from HRPD to IX and the cross-paging function between dual networks, 3GPP2 defines the Circuit Service Notification Application (CSNA). The air interface protocol, which can send the IX network message to the MS/AT through the air interface of the HRPD network through the 3G1X service (3G1X Services) message, that is, send the 3G1X link access control encapsulation protocol data unit by sending the 3G1X service message (Line Acces s Control Encapsulated Protocol Da ta Uni t ) message. In addition, the overhead (overhead) message for saving IX can be sent to the MS/AT through the 3G1X parameter (3GlXParameters) message of the CSNA protocol. The data encapsulation format is as follows:

2 is a flow chart of the A21 handover in the prior art, that is, based on the network architecture shown in FIG. 1, a flow chart for informing the MS/AT to redirect from the HRPD network to the IX network and switching to the IX, as shown in FIG. 2, includes:

201: The HRPD AN sends an IX Parameters Reques t message to the IX BS through the A21 interface, requesting IX redirection parameters, where are the IX overhead parameters and the random (RAND) values.

202: The IX BS provides IX overhead parameters and RAND values for the HRPD AN.

203: The HRPD AN sends an acknowledgement (ACK) message through the A21 interface, indicating that the overhead parameter and the RAND value are received.

Here 201 to 203 can be done at any time, but must be completed before 205.

204: The MS/AT sends a pilot measurement to the HRPD AN, which may include an HRPD network or IX The wireless environment of the network measures information.

205: At some point, if the HRPD AN determines that the wireless environment of the IX network is better for supporting and MS/AT communication, the HRPD AN sends the IX overhead parameter and the RAND value to the MS/AT through the CSNA, ready to start the hard handover.

Here HRPD AN can send IX overhead parameters and RAND values to MS/AT at any time, but must be executed before the following processing.

206: The MS/AT acknowledges receipt of the IX overhead parameter and the RAND value.

207: After the HRPD AN determines that the MS/AT has received the latest IX overhead parameter, the HRPD AN sends an IX Service Redirection message to the MS/AT through the CSNA protocol.

When the MS/AT receives the IX Service Redirection message, it interprets the message as an indication that the MS/AT should begin redirecting the active call to the IX system.

208: The MS/AT acknowledges receipt of the IX service redirection message.

209: The MS/AT sends an Origination message to the HRPD AN through the CSNA protocol.

210: The HRPD AN confirms receipt of the call message.

211: The HRPD AN encapsulates the start-up message in the IX Air Interface Signaling message and sends it to the IX BS through the A21 interface.

212: The IX BS sends a response message to the HRPD AN through the A21 interface, indicating that the IX air interface signaling message is received.

213: The IX BS receives and processes the originating message and sends a connection management service request (CM Service)

Request ) Message to the IX MSC.

214: The MSC sends an Assignment Request message to the IX BS.

215: The IX BS creates an IX handoff direction message, which is encapsulated in the IX air interface signaling message and sent to the HRPDAN through the A21 interface, indicating that the transmission control information in the A21 message needs to be acknowledged.

216: The HRPD AN sends an IX handover directed message to the MS/AT through the CSNA protocol. HRPD AN indicates that the MS/AT is required to send an acknowledgment, and will not pass the A21 interface until it receives an acknowledgment message from the air interface. Send a reply message.

217: The MS/AT sends a response message to the HRPD AN, indicating that the IX handover directed message is received.

At this point, MS/AT has been redirected from the HRPD network to the IX network.

218: The HRPD AN sends a response message to the IX BS through the A21 interface.

219: The MS/AT is transferred to the IX wireless network and captures the IX traffic channel.

220: The MS/AT sends an IX handoff complet ion message to the IX BS.

221: The IX BS sends an As s ignment Complete message to the IX MSC.

At this point, the MS/AT has switched from the HRPD network to the IX network.

In the above, when the terminal is notified to perform the redirection, the HRPD AN needs to send the IX service redirection message to the MS/AT through the CSNA protocol. According to the 3G1X service message format of the CSNA protocol, the CSNA protocol needs to be processed before the CSNA protocol is processed. IX service redirection "message becomes "link access control encapsulation protocol data unit" message, which requires HRPD AN to have the function of IWS, which not only makes the system very complicated, but also the original intention of the interface with A21, namely HRPD AN Just passing the IX message is a violation.

In addition, similar problems exist when the terminal is notified from UBR (Ultra tra Mobi le Broadband) to be redirected to other types of networks, such as HRPD networks or IX networks.

Summary of the invention

Embodiments of the present invention provide a method and apparatus for informing a terminal to redirect, and can notify a terminal to redirect when only the target access network has an IWS function.

In order to achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

A method for notifying a terminal to redirect, comprising:

The source access network triggers the target access network to send a service redirection message;

The source access network receives a service redirection message from the target access network, and sends the service redirection message to the terminal.

A device for informing a terminal to redirect, comprising:

a sending module, configured to trigger a target access network to send a service redirection message;

a receiving module, configured to receive a service redirection message from the target access network; And a forwarding module, configured to forward the service redirection message to the terminal.

A method for notifying a terminal to redirect, comprising:

The target access network sends a service redirection message to the source access network under the trigger of the source access network.

A device for informing a terminal to redirect, comprising:

a receiving module, configured to respond to a trigger of the source access network;

a processing module, configured to generate a service redirect message;

And a sending module, configured to send a service redirection message to the source access network.

It can be seen from the above technical solution that, by using the method and device for informing the terminal redirection provided by the embodiment of the present invention, the source access network needs to trigger the target access network to send a service redirection message before sending the service redirection message to the terminal. That is, the service redirection message is created by the target access network, and is carried in the air interface signaling of the source access network, so that only the target access network has the function of the IWS, and the source access network does not need to have the function of the IWS. This makes the system structure of the source access network easier. DRAWINGS

FIG. 1 is a schematic diagram of a network structure in which an IX network and an HRPD network interoperate in the prior art.

2 is a flow chart of a terminal switching from HRPD to IX in the prior art.

FIG. 3 is a flowchart of redirecting a terminal from an HRPD network to an IX network according to Embodiment 1 of the present invention. Figure 4 is a schematic diagram of the network structure of UMB and IX network and HRPD network interoperability.

FIG. 5 is a schematic structural diagram of a source access network device according to Embodiment 1 of the present invention.

FIG. 6 is a schematic structural diagram of a target access network device according to Embodiment 1 of the present invention.

FIG. 7 is a flowchart of redirecting a terminal from an HRPD network to an IX network according to Embodiment 2 of the present invention. FIG. 8 is a flowchart of redirecting a terminal from an HRPD network to an IX network according to Embodiment 3 of the present invention. FIG. 9 is a flowchart of redirecting a terminal from an HRPD network to an IX network according to Embodiment 4 of the present invention. FIG. 10 is a flowchart of redirecting a terminal from an HRPD network to an IX network according to Embodiment 5 of the present invention. detailed description

In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention will be described below with reference to the accompanying drawings. Further detailed description.

According to the embodiment of the present invention, when the mobile terminal is notified of the redirection, that is, after the source access network determines that the terminal needs to be redirected to the target access network, the source access network first requests the redirection parameter from the target access network, and obtains the redirection parameter. After the redirecting parameter sent by the target access network is forwarded to the terminal, and the acknowledgment terminal receives the latest redirection parameter, the target access network is triggered to generate a service redirection message, and the source access network sends the service redirection message to the The terminal, thereby completing the process of notifying the mobile terminal to redirect. Here, the source access network requests a redirection parameter from the target access network, and may send a redirection parameter request message, a handover request message, and the like to the target access network.

The following takes the source access network as the HRPD network and the target access network as the IX network with the IWS function network entity as an example, and illustrates the process of redirecting the terminal from the HRPD network to the IX network after notifying the mobile terminal to redirect.

Embodiment 1:

FIG. 3 is a flowchart of redirecting from HRPD to IX according to Embodiment 1 of the present invention, as shown in FIG.

The process of redirecting HRPD to IX includes:

301: The HRPD AN sends an IX redirection parameter request message to the IX BS through the A21 interface, and requests the IX overhead parameter and the RAND value. In this embodiment, the 1X BS has an IWS function.

302: The IX BS provides IX overhead parameters and RAND values for the HRPD AN.

303: The HRPD AN sends a response message through the A21 interface, and the response receives the overhead parameter and RAND. 304: The MS/AT sends a pilot measurement to the HRPD AN, and the pilot measurement may include wireless environment measurement information of the HRPD network or the IX network, according to the pilot measurement message, if the HRPD AN determines the wireless environment of the IX network for support and MS If the /AT communication is better, the target access network can be triggered to send a service redirection message.

305: The HRPD AN sends the IX overhead parameter and the RAND value to the MS/AT through the CSNA protocol, ready to start the hard handover.

Here 304 can also be executed before 301 to 303 or after 305.

306: The MS/AT acknowledges receipt of the IX overhead parameter. 307: After the HRPD AN determines that the MS/AT has received the latest IX overhead parameter, the HRPD AN sends an IX handover request message to the IX BS through the A21 interface, indicating that the HRPD AN is ready to start a hard handover to the IX network.

308: When the IX BS receives the IX handover request message through the A21 interface, the IX BS responds to the IX handover response message to the HRPD AN through the A21 interface, indicating that a hard handover from the HRPD to the IX will start.

309: After the IX BS receives the IX handover request message through the A21 interface, the IX BS creates an IX service redirection message, which is encapsulated in the IX air interface signaling message and sent to the HRPD AN through the A21 interface, indicating the transmission control in the A21 message. Information needs to be confirmed.

310: The HRPD AN sends an IX service redirection message to the MS/AT through the CSNA protocol. When the MS/AT receives the IX Service Redirection message, it interprets the message as an indication that the MS/AT should begin switching the active call to the IX system.

311: The MS/AT sends an IX service redirection response message to the HRPD AN.

312: The HRPD AN sends a response message to the IX BS.

313 to 321: The MS/AT initiates an IX originating message and completes the redirection from the HRPD network to the IX network by using the service redirection message, as described in 209 to 217.

Of course, the MS/AT switch from the HRPD network to the IX network can be further completed in accordance with the procedures of 218 to 221.

The IX BS can also be redirected from IX to HRPD using the method of this embodiment, with the difference that the redirection parameter is an overhead parameter.

Figure 4 shows the network structure of the interoperability between the UMB and IX networks and the HRPD network. As shown in Figure 4, the UMB has a U5 interface. UMB can interoperate with the HRPD. The UMB also has an A21-like interface. We assume here that it is an A30 interface. UMB can be interoperated with IX. The main functions of these two interfaces include: delivery of overhead messages of the other system, interoperation-related signaling, interoperation-assisted signaling, and bearer switching procedures. In the data, in addition to the UMB air interface there is a CSNA-like function.

Therefore, those skilled in the art can understand that the SRNC/eBS in the UMB can also utilize this. The method of the embodiment is redirected from UMB to IX, the difference being that the SRNC/eBS interacts with the IX BS through the A30 interface.

The SRNC/eBS in the UMB can be redirected from the UMB to the HRPD by using the method of this embodiment. The difference is that the SRNC/eBS exchanges information with the HRPD AN through the U5 interface, and the redirection parameter is an overhead parameter.

A person skilled in the art can also understand that the naming of the service redirection message may be different in different network applications, which is not limited by the content of the present invention.

FIG. 5 is a schematic structural diagram of a source access network device according to Embodiment 1 of the present invention. The device includes a sending module 501, a receiving module 502, a forwarding module 503, and a processing module 504.

The receiving, by the receiving module 502, the pilot measurement parameter of the terminal is sent to the processing module 503, and the processing module 504 determines whether to trigger the target access network to send the service redirection message according to the received pilot measurement request, and determines to trigger the target access network to send the message. After the service redirection message, the sending module 501 is instructed to trigger the target access network to send a service redirection message. The sending module 501 may also request a redirection parameter from the target access network. After the receiving module 502 receives the redirection parameter from the target access network, the forwarding module 503 encapsulates the redirection parameter in the air interface of the source access network, and sends the redirection parameter. To the terminal.

After receiving the service redirection message encapsulated in the air interface signaling message, the receiving module 502 encapsulates the service redirection message in the air interface of the source access network and sends it to the terminal.

FIG. 6 is a schematic structural diagram of a target access network device according to Embodiment 1 of the present invention. As shown in FIG. 6, the device includes a receiving module 601, a processing module 602, and a sending module 603.

After the receiving module 601 responds to the trigger from the source access network, the processing module 602 generates a service redirection message and encapsulates it in the air interface signaling message, and sends it to the source access network through the sending module 603.

In addition, after the receiving module 601 receives the request for the redirection parameter from the source access network, the sending module 603 sends a redirection parameter to the source access network.

Embodiment 2:

FIG. 7 is a flowchart of redirecting from an HRPD network to an IX network according to Embodiment 2 of the present invention, and The difference of the first embodiment is that, in the second embodiment, the handover request message sent by the source access network to the target access network is an event notification message. As shown in Figure 7, the process of redirecting from the HRPD network to the IX network includes:

701 to 706: The HRPD AN may send an IX redirection parameter request message to the IX BS through the A21 interface, request the IX overhead parameter and the RAND value, and send it to the MS/AT. In this embodiment, the IX BS has the IWS function, MS/ The AT transmits pilot measurement parameters to HRPD AN, the same as 301 to 306.

707: After the HRPD AN determines that the MS/AT has received the latest IX overhead parameter and the RAND value, the HRPD AN sends an Event Notification message to the IX BS through the A21 interface, carrying the indication that the HRPD AN is ready to start a hard handover to the IX network. Instructions.

The event notification message here includes a Message Type, a Correlation ID, a Mobile Identity, and an Event.

In the event field, different hexadecimal numbers are used to represent different event meanings, such as 00H for MS/AT on the IX network, 01H for MS/AT on the HRPD network, 05H for switching to the IX indication, etc. There are also some reserved values in the event domain that can be defined as different events as needed.

708: The IX BS sends a response message through the A21 interface to indicate that an event notification message is received.

709: After the IX BS receives the IX event notification message through the A21 interface, the IX BS creates an IX service redirection message, which is encapsulated in the IX air interface signaling message and sent to the HRPD AN through the A21 interface, indicating the transmission control information in the A21 message. need confirmation.

710: The HRPD AN sends an IX service redirection message to the MS/AT through the CSNA protocol. When the MS/AT receives the IX Service Redirection message, it interprets the message as an indication that the MS/AT should begin switching the active call to the IX system.

711: The MS/AT sends a response message to the HRPD AN.

712: The HRPD AN sends a response message to the IX BS.

713 to 721: The MS/AT initiates an IX originating message, and the redirection process from the HRPD network to the IX network by using the service redirection message is the same as 209 to 217.

Of course, the terminal can also be further switched according to the process of 218 to 221. The IX BS can also be redirected from IX to HRPD using the method of this embodiment, with the difference that the redirection parameter is an overhead parameter.

It will be understood by those skilled in the art that the SRNC/eBS in the UMB can also be redirected from the UMB to the IX by the method of this embodiment, except that the SRNC/eBS exchanges information with the IX BS through the A30 interface.

The SRNC/eBS in the UMB can be redirected from the UMB to the HRPD by using the method of this embodiment. The difference is that the SRNC/eBS exchanges information with the HRPDAN through the U5 interface, and the redirection parameter is an overhead parameter.

The source access network device and the target access network device of the second embodiment are the same as the first embodiment. Embodiment 3:

FIG. 8 is a flowchart of redirecting from HRPD to IX according to Embodiment 3 of the present invention. The difference between Embodiment 3 and Embodiment 1 is that, in Embodiment 3, the target access network receives the handover request of the source access network. After receiving the redirection parameter to the source access network, the target access network sends a service redirection message to the source access network after receiving the redirection parameter response message of the source access network. As shown in Figure 8, the process of redirecting from HRPD to IX includes:

801: The MS/AT sends a pilot measurement to the HRPD AN. The pilot measurements can include HRPD or IX system wireless environment measurement information.

802: At some point, when the HRPD AN determines that the wireless environment of the IX network is better for support and MS/AT communication, the HRPD AN is ready to start a hard handover, and the HRPD AN sends an IX handover request message to the IX BS through the A21 interface, indicating HRPD AN. It is ready to start a hard handover to the IX network, which in this embodiment has the IWS function.

803: When the IX BS receives the IX handover request message through the A21 interface, the IX BS responds to the IX handover response message to the HRPD AN through the A21 interface, indicating that a hard handover from the HRPD to the IX will start.

804: After the 1X BS receives the IX handover request message through the A21 interface, the 1X BS opens the IX The pin parameter and the RAND value are encapsulated in the IX air interface signaling message and sent to the HRPD through the A21 interface.

AN, indicating that the transmission control information in the A21 message needs to be acknowledged.

Here, in 802 and 804, when the HRPD AN determines the wireless environment of the IX network for support and

The MS/AT communication is better, and the HRPD AN also sends an event notification message to the IX BS through the A21 interface, indicating

The IX BS sends the IX overhead parameter message and the RAND value to the HPRD AN.

805: The HRPD AN sends the IX overhead parameter and the RAND value to the MS/AT through the CSNA protocol.

806: The MS/AT acknowledges receipt of the IX overhead parameter message and the RAND value.

807: The HRPD AN sends a response message to the IX BS through the A21 interface, indicating that the MS/AT receives

IX overhead parameters and RAND values.

808: When the IX BS receives the response message from the HRPD AN through the A21 interface, indicating that the MS/AT receives the IX overhead parameter and the RAND value, the IX BS creates an IX service redirection message, encapsulated in

The IX air interface signaling message is sent to the HRPD AN through the A21 interface, indicating that the transmission control information in the A21 message needs to be acknowledged.

809: The HRPD AN sends an IX service redirection message to the MS/AT through the CSNA protocol. when

After the MS/AT receives the IX Service Redirection message, it interprets the message as an indication that the MS/AT should begin switching the active call to the IX system.

810: The MS/AT sends an IX service redirection response message to the HRPD AN.

811: After receiving the IX service redirection response message, the HRPD AN sends a response message to the 1X BS.

812 to 820: The MS/AT initiates an IX originating message, and the redirection process from the HRPD network to the IX network by using the service redirection message is the same as 209 to 217.

Of course, the terminal can also be further switched according to the process of 218 to 221.

A person skilled in the art can understand that the SRNC/eBS in the UMB can also redirect the IX from the UMB by using the method of this embodiment, except that the SRNC/eBS exchanges information with the 1X BS through the A30 interface. The SRNC/eBS in the UMB can be redirected from the UMB to the HRPD by using the method of this embodiment. The difference is that the SRNC/eBS exchanges information with the HRPDAN through the U5 interface, and the redirection parameter is an overhead parameter.

The source access network device and the target access network device implementing the third embodiment are the same as the first embodiment. Embodiment 4:

FIG. 9 is a flowchart of redirecting from HRPD to CDMA IX according to Embodiment 4 of the present invention. The difference between Embodiment 4 and Embodiment 3 is that, in Embodiment 4, after the source access network receives the pilot measurement parameters of the terminal, Directly initiate a redirect parameter request to the target access network. As shown in Figure 9, the process of redirecting from HRPD to CDMA 1 X includes:

901: The MS/AT sends a pilot measurement to the HRPD AN. The pilot measurements can include HRPD or IX system wireless environment measurement information.

902: At some point, when the HRPD AN determines that the wireless environment of the IX network is better for support and MS/AT communication, the HRPD AN is ready to start a hard handover to IX. The HRPD AN sends an IX Redirection Parameter Request message to 1 X B S through the A21 interface, requests 1 X overhead parameter and RAND value, and indicates that HRPD AN is ready to start a hard handover to IX.

903: The IX BS provides the IX overhead parameter and the RAND value for the HRPD AN through the IX parameter message, and indicates that the transmission control information in the A21 message needs to be acknowledged.

904: After receiving the IX overhead parameter and the RAND value from the IX BS, the HRPD AN sends the IX overhead parameter and the RAND value to the MS/AT through the CSNA protocol. In this embodiment, the IX BS has the IWS function.

905: The MS/AT sends a redirect parameter response message to the HRPD AN, confirming that the IX overhead parameter and the RAND value are received.

906: After the HRPD AN determines that the MS/AT has received the latest IX overhead parameter and RAND value, the HRPD AN sends a response message to the IX BS through the A21 interface, indicating that the MS/AT is ready. Ok, you can start a hard switch to the 1 X network process.

907: When the IX BS receives the response message from the HRPD AN through the A21 interface, after the AT/MS receives the lx overhead parameter and the RAND value, the IX BS creates an IX service redirection message, which is encapsulated in the IX air interface signaling message and passed. The A21 interface is sent to the HRPD AN, indicating that the transmission control information in the A21 message needs to be acknowledged.

908: The HRPD AN sends an IX service redirection message to the MS/AT through the CSNA protocol. When the MS/AT receives the IX Service Redirection message, it interprets the message as an indication that the MS/AT should begin switching the active call to the IX system.

909: The MS/AT sends a response message to the HRPD AN.

910: The HRPD AN receives the response message of the MS/AT, and sends a response message to the IX BS.

911 to 919: The MS/AT initiates an IX originating message, and the redirection process from the HRPD network to the IX network by using the service redirection message is the same as 209 to 217.

The IX BS can also be redirected from IX to HRPD using the method of this embodiment, with the difference that the redirection parameter is an overhead parameter at this time.

It will be understood by those skilled in the art that the SRNC/eBS in the UMB can also redirect IX from the UMB by using the method of this embodiment, except that the SRNC/eBS exchanges information with the 1X BS through the A30 interface.

The source access network device and the target access network device implementing the fourth embodiment herein are the same as the first embodiment. Embodiment 5:

10 is a flowchart of redirecting from HRPD to CDMA IX according to Embodiment 5 of the present invention, in implementation In the first embodiment to the fourth embodiment, the source access network triggers the target access network to send a service redirection message after determining that the terminal receives the redirection parameter. In actual applications, the source access network may directly trigger the target connection. Incoming network sends a service redirect message. As shown in Figure 10, the process is as follows: First, the MS/AT obtains the service through the HRPD network. For some reasons, such as HRPD network maintenance, HRPD AN failure, etc., HRPD AN decides to redirect this MS/AT to 1 x. The internet.

1001: The HRPD AN sends a handover request message to the IX BS through the A21 interface, indicating that the HRPD AN wishes to redirect the MS/AT to the IX network. In this embodiment, the IX BS has the IWS function.

Here, the HRPD AN can also send an event notification request message to the IX BS through the A21 interface, indicating that the HRPD AN wishes to redirect the MS/AT to the IX network.

1002: After receiving the handover request message through the A21 interface, the IX BS responds to the handover response message to the HRPD AN through the A21 interface, and agrees to redirect the MS/AT from the HRPD to the IX network.

1003: After the 1X BS receives the handover request message through the A21 interface, and agrees to redirect the MS/AT from the HRPD to the IX, an IX service redirection message is created, encapsulated in the IX air interface signaling message, and sent through the A21 interface. To the HRPD AN, the indication of the transmission control information needs to be confirmed.

1004: The HRPD AN sends an IX service redirection message to the MS/AT through the CSNA protocol. When the MS/AT receives the 1 X Service Redirection message, it interprets the message as MS/AT should be redirected to the 1 x system.

1005: The MS/AT acknowledges receipt of the 1 X Service Redirection message.

1006: The HRPD AN sends a response message to the IX BS through the A21 interface, indicating that the MS/AT receives the IX service redirection message.

After that, the MS/AT is transferred to the IX network, and the IX network is searched for, and the IX redirection parameters are obtained, including the cost parameter and the RAND random number. After the IX redirection parameter is obtained, the SSH message is directly sent to the IX network, and subsequently obtained from the IX network. The process of service is the same as existing technology.

A person skilled in the art can understand that the IX BS can also be redirected from the IX to the HRPD network by using the method of this embodiment, except that after the MS/AT is turned to the HRPD network, the redirection parameter obtained from the HRPD network is an overhead parameter. A person skilled in the art can understand that the SRNC/eBS in the UMB can also redirect the IX from the UMB by using the method of this embodiment, except that the SRNC/eBS exchanges information with the 1X BS through the A30 interface.

The SRNC/eBS in the UMB can be redirected from the UMB to the HRPD by using the method of this embodiment. The difference is that the SRNC/eBS exchanges information with the HRPDAN through the U5 interface, and the MS/AT obtains the HRPD network after moving to the HRPD network. The redirection parameter is the cost parameter.

The source access network device and the target access network device implementing the fifth embodiment herein are different from the source access network device and the target access network device in the first embodiment in that:

In the source access network device in the fifth embodiment, the processing module 504 determines whether to switch the terminal to the target access network. When determining to switch the terminal to the target access network, the sending module 501 triggers the target access network to send the service weight. After the receiving module 502 receives the service redirection message encapsulated in the air interface signaling message, the forwarding module 503 encapsulates the service redirection message in the air interface of the source access network and sends the message to the terminal.

In the target access network device in the fifth embodiment, the transmitting module 603 directly transmits the redirection parameter to the terminal.

In conclusion, the above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for notifying a terminal redirection, comprising:

2. The method for informing a terminal to redirect according to claim 1, further comprising: obtaining, by the source access network, a redirection parameter from the target access network;

The source access network sends the redirection parameter to the terminal.

The method for informing a terminal to redirect according to claim 1 or 2, wherein the source access network triggers the target access network to send a service redirection message, including:

The source access network sends a handover request message or an event notification message to the target access network.

The method for informing a terminal to redirect according to claim 2, wherein the source access network triggers the target access network to send a service redirection message, including:

The source access network sends a response message to the target access network, indicating that the terminal has received the redirect parameter.

The method for informing a terminal to redirect according to claim 2, further comprising: the source access network requesting a redirection parameter from the target access network before acquiring the redirection parameter from the target access network.

The method for informing a terminal to redirect according to claim 5, wherein the requesting, by the source access network, the redirection parameter to the target access network comprises:

The source access network sends a redirect parameter request message to the target access network.

The source access network sends an event notification message or a handover request message to the target access network.

The method for informing a terminal to redirect according to claim 2, further comprising: Receiving, by the source access network, a pilot measurement message from the terminal before the target access network sends a service redirection message;

The source access network determines, according to the pilot measurement message, whether to trigger the target access network to send a service redirection message.

The method for notifying a terminal redirection according to any one of claims 1 to 8, wherein the source access network is a high speed packet data technology HRPD network, an ultra wideband mobile UMB network or code division multiple access. CDMA IX network.

The method for notifying a terminal redirection according to any one of claims 1 to 8, wherein the target access network is an HRPD network, a UMB network or a CDMA IX network.

The method for informing a terminal to redirect according to claim 2, wherein when the target access network is a CDMA IX network, the redirection parameter includes an overhead parameter and a random RAND value.

The method for informing a terminal to redirect according to claim 2, wherein when the target access network is an HRPD network or a UMB network, the redirection parameter includes an overhead parameter.

13. A device for informing a terminal to be redirected, comprising:

a sending module (501), configured to trigger a target access network to send a service redirection message;

The receiving module (502) is configured to receive a service redirection message from the target access network, and the forwarding module (503) is configured to forward the service redirection message to the terminal.

The apparatus for notifying a terminal redirection according to claim 13, further comprising: a processing module (504), configured to receive a pilot measurement request from the terminal, and according to the received pilot measurement request Determining whether the target access network is triggered to send a service redirection message, and after determining that the target access network is triggered to send a service redirection message, instructing the sending module (501) to trigger the target access network to send a service weight Directed message.

The device for informing a terminal to redirect according to claim 14, wherein the sending module (501) is further configured to request a redirection parameter from the target access network;

The receiving module (502) is further configured to receive a redirection parameter from the target access network; the forwarding module (503) is further configured to forward the redirection parameter to the terminal.

A method for notifying a terminal to redirect, comprising:

The target access network sends a service redirection message to the source access network in response to a trigger of the source access network.

The method for informing a terminal to redirect according to claim 16, further comprising: the target access network sending a redirection parameter to the source access network.

The method for informing a terminal to redirect according to claim 17, further comprising: receiving, before the target access network sends a redirection parameter to the source access network, receiving a redirection from the source access network Request for parameters.

The method for informing a terminal to redirect according to claim 18, wherein the request for receiving a redirection parameter from a source access network comprises:

A handover request message or an event notification message is received from the source access network.

The method for notifying a redirection of a terminal according to claim 18, wherein the request for receiving a redirection parameter from a source access network comprises:

Receive a redirect parameter request message from the source access network.

The method for informing a terminal to redirect according to claim 20, wherein the triggering of the target access network in response to the source access network includes:

The target access network receives a handover request message or an event notification message from the source access network.

The method for informing a terminal to redirect according to claim 16, wherein the triggering of the target access network in response to the source access network includes:

The target access network receives a response message from the source access network, indicating that the terminal has received the redirect parameter.

The method for notifying a terminal redirection according to any one of claims 16 to 22, wherein the source access network is a high speed packet data technology HRPD network, an ultra wideband mobile UMB network or code division multiple access. CDMA IX network.

24. A method of notifying a terminal redirection according to any one of claims 16 to 22, The feature is that the target access network is an HRPD network, an UMB network, or a CDMA IX network.

The method for informing a terminal to redirect according to claim 17, wherein when the target access network is a CDMA IX network, the redirection parameter includes an overhead parameter and a RAND value.

The method for informing a terminal to redirect according to claim 17, wherein when the target access network is an HRPD network or a UMB network, the redirection parameter includes an overhead parameter.

27. A device for informing a terminal to be redirected, comprising:

a receiving module (601), configured to respond to a trigger from the source access network;

a processing module (602), configured to generate a service redirection message;

The sending module (603) is configured to send a service redirection message to the source access network.

The apparatus for informing a terminal to redirect according to claim 27, wherein the receiving module (601) is further configured to receive a request for a redirection parameter from the source access network;

The sending module (603) is further configured to send a redirection parameter to the source access network.