WO2009067946A1

WO2009067946A1 - A method, system and device for switching between wireless communication network systems

Info

Publication number: WO2009067946A1
Application number: PCT/CN2008/073127
Authority: WO
Inventors: Longgui Huang; Jixing Liu; Xin Zhong; Jie Zhao; Zhiming Li
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-11-26
Filing date: 2008-11-20
Publication date: 2009-06-04

Abstract

A method, system and device for switching between wireless communication network systems are provided in the present invention and belong to the communication field. The method includes that: the simplified Access Network/Packet Control Function unit AN/PCF in the target access network receives the switch request message from the terminal, selects the target AN based on the said switch request message, and then transmits the session transfer request message to the selected target AN; the said simplified AN/PCF receives the session transfer response message from the said target AN, and order the said terminal to access the said target AN. Thesystem includes a simplified Access Network/Packet Control Function unit AN/PCF and a target AN. The simplified AN/PCF includes a receiving module and a processing module. When deciding to switch from UMB network to HRPD network, the present invention can shorten the whole switch delay, ensure the continuity of user business, and reduce user interrupt so as to provide better experience for user under the premise that AT has succeed in pre-setting up HRPD and PPP session.

Description

Method, system and device for switching between wireless communication network systems

The present invention relates to the field of communications, and in particular, to a method, system and device for switching between systems of a wireless communication network. Background technique

At present, the third-generation mobile communication technology is gradually matured, and users can obtain various service services on networks supported by different technologies, for example, users use VoIP (Voice over Internet Protocol) in UMB (Ultra Mobile Broadband). Or obtain voice services on the HRPD (High Rate Packet Data) network in the CDMA (Code-Division Multiple Access) technology standard series.

See Figure 1, which is a schematic diagram of the UMB network architecture. The HA (Home Agent) is responsible for management tasks and assigns an IP address to an AT (Access Terminal) such as an MS (Mobile Station) or a UE (User Equipment); AGW (Access Gateway, The access gateway) maintains the current DAP (Data Attachment Point) information of the AT. When receiving the forward data sent to the AT, the AGW forwards the forward data to the DAP. The service eBS (Serving evolved Base Station, service) The evolved base station includes a forward service eBS and a reverse service eBS. The forward service eBS and the reverse service eBS may be the same eBS or different eBSs; the DAP is the data attachment point of the AT, and the DAP is received from the external IP network. After the data to the AT, the data is tunneled to and from the serving eBS to the current serving eBS of the AT, where the DAP can be the same entity as the serving eBS; the SRNC (Session Reference Network Controller) is used for maintenance. The session state of the AT is the centralized control point of the session, and the paging control function is completed. The signaling between the SRNC and the AT needs to be encapsulated and forwarded over the data tunnel on the RLP of the serving eBS. For the reverse data sent by the AT, the serving eBS can directly send the reverse data to the external IP network or send it to the DAP through the tunnel and then forward it by the DAP.

See Figure 2 for a schematic diagram of the HRPD network structure. HRPD provides users with high speed packet data services. The solid line in the figure indicates the transmission path carrying data, including the A8/A10 interface, and the dotted line indicates the transmission path of signaling, including the A9/A11 interface. The AT communicates with the AN (Access Network) unit through the HRPD air interface technology. After the AN unit exchanges data and information through the A8/A9 interface and the PCF (Packet Control Function) unit, the PCF passes the A10. The /A11 interface and the PDSN (Packet Data Serving Node) unit perform data and signaling interaction. In actual applications, the PDSN accesses the AT through a Point-to-Point Protocol (PPP). IP network, which provides the next hop route for packet data packets. The HA is used to provide an IP address for the AT, etc. HAAA (Home Authentication, Authorization and Account) is used to provide authentication, authorization, and accounting functions for the AT. In order to ensure the continuity of the service when the user switches from the UMB network to the HRPD network, especially for the continuity of the voice service with strong user experience requirements, the current 3GPP2 (Third Generation Partnership Project 2, International Organization) proposes the UMB network. The architecture of the service active state switching between the HRPD network and the HRPD network is shown in Figure 3. In order to enable multi-mode terminals supporting multiple networks to perform service activation between low-latency UMB networks and HRPD networks (in the figure, voice services are used as an example), HRPD needs to be performed through the current UMB network before the handover process. Pre-establishment of contexts such as sessions of the network. In this architecture, the AT sends and receives HRPD packets through the IP interface tunnel established with the HRPD AN/PCF. This tunnel allows the AT to send and receive HRPD between the UMB active state and the HRPD AN/PCF for HRPD pre-registration and HRPD. Relevant HRPD packets of the session, such as PPP setup, TFT setup, signaling messages, etc.; These HRPD packets are sent over UDP/IP and carried over the UMB network, ie, pure UMB packets appear to the UMB network.

On the issue of how to switch from a UMB network to an HRPD network, the prior art provides a method of introducing a simplified AN/PCF, which is a virtual HRPD AN/PCF, which includes the HRPD protocol stack. (Security layer and above), but the simplified AN/PCF does not have wireless transceiving function, and supports the standard IOS (Interoperability Specification) interface (A10/A11) with PDSN, and other deployed The standard IOS (Interoperability Specification) interface (such as A13, etc.) is also supported between the HRPD AN/PCF (the real target HRPD AN/PCF). The method includes: AT first performs a pre-establishment process with the simplified AN/PCF (including session negotiation, authentication, PPP establishment, service flow template establishment, etc.). But at the time of the actual handover, when the AT is tuned to the HRPD network, after capturing the HRPD network, the AT first establishes a connection with the real target HRPD AN/PCF, and then the real target HRPD AN/PCF obtains the HRPD from the simplified AN/PCF. Session, then build A8/10. See Figure 4 for a schematic diagram of the prior art UMB to simplified AN/PCF handover process.

In the process of implementing the present invention, the inventors found that the UMB to simplified AN/PCF switching method provided by the prior art has at least the following disadvantages and deficiencies:

The switching method provided by the prior art, when the AT switches to the HRPD, the AT needs to re-capture the network, and then establishes the HRPD connection, and then the real target HRPD AN/PCF acquires the HRPD session of the AT from the simplified AN/PCF, and finally establishes A8/A10, this makes the entire switching delay longer, and accordingly, the user interruption is longer. Summary of the invention

In order to reduce the handover delay when the active state is switched from the UMB to the HRPD, the embodiment of the present invention provides a method, system and device for switching between systems of a wireless communication network. The technical solution is as follows:

In one aspect, a method for inter-system handover of a wireless communication network is provided, the method comprising:

The simplified access network/packet control function unit AN/PCF in the target access network receives the handover request from the terminal And selecting a target AN according to the handover request message, and sending a session transfer request message to the selected target AN; the simplified AN/PCF receiving a session transfer response message from the target AN, indicating that the terminal accesses the The target AN.

In one aspect, a handover system is provided, the system comprising: a simplified access network/packet control functional unit AN/PCF and a target AN, the simplified AN/PCF and target AN being located in a target access network;

The simplified AN/PCF is configured to receive a handover request message from a terminal, select a target AN according to the handover request message, send a session transfer request message to the selected target AN, and further serve to receive a session from the target AN Transmitting a response message, indicating that the terminal accesses the target AN;

The target AN, configured to receive the simplified AN/PCF sent session transfer request message, and return a session transfer response message to the simplified AN/PCF, and further configured to receive the terminal in the simplified AN /PCF indicates the access.

In another aspect, a simplified access network/packet control functional unit AN/PCF is provided, the simplified AN/PCF comprising:

a receiving module, configured to receive a handover request message from the terminal;

a processing module, configured to: after the receiving module receives the handover request message, select a target AN according to the handover request message, and send a session transfer request message to the selected target AN, and receive the return of the target AN After the session transfer response message, the terminal is instructed to access the target AN.

In still another aspect, a target AN is provided for receiving a simplified AN/PCF session transfer request message; and transmitting a session transfer response message to the simplified AN/PCF.

The beneficial effects of the technical solutions provided by the embodiments of the present invention are:

On the premise that the AT has successfully pre-established the HRPD and PPP sessions, when it is decided to switch from the UMB network to the HRPD network, the session transfer request message is sent to the target AN by using the simplified AN/PCF, and the target AP is hard-switched. The method implements the handover process of the UMB network to the HRPD network, reduces the entire handover delay, thereby ensuring continuity of user services and reducing user interruption. DRAWINGS

1 is a schematic diagram of a UMB network architecture provided by the prior art;

2 is a schematic structural diagram of an HRPD network provided by the prior art;

3 is a schematic structural diagram of a UMB network and an HRPD network handover provided by the prior art;

4 is a schematic diagram of a handover between an AN/PCF and a UMB network to an HRPD network provided by the prior art; FIG. 5 is a flowchart of a method for switching between systems of a wireless communication network according to Embodiment 1 of the present invention; 6 is a schematic diagram of handover interaction between wireless communication network systems according to Embodiment 1 of the present invention;

7 is a schematic diagram of handover interaction between wireless communication networks according to Embodiment 2 of the present invention;

8 is a flowchart of a method for switching between systems of a wireless communication network according to Embodiment 3 of the present invention;

9 is a schematic diagram of handover interaction between wireless communication network systems according to Embodiment 3 of the present invention;

10 is a schematic diagram of handover interaction between wireless communication network systems according to Embodiment 4 of the present invention;

11 is a schematic diagram of a handover system according to Embodiment 5 of the present invention;

FIG. 12 is another schematic diagram of a handover system according to Embodiment 5 of the present invention; FIG.

Figure 13 is a schematic diagram of a simplified AN/PCF provided in Embodiment 5 of the present invention;

Figure 14 is a schematic diagram of a target AN provided in Embodiment 6 of the present invention. detailed description

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

For the handover process of the UMB network to the HRPD network, the entire handover delay is reduced, and the continuity of the user service is ensured. The embodiment of the present invention provides a method for switching between systems of the wireless communication network, and the method content is as follows: The simplified access network/packet control function unit AN/PCF receives the handover request message sent by the access terminal, and the simplified AN/PCF sends a session transfer request message to the target AN; the simplified AN/PCF receives the session transfer sent by the target AN After the response message, the access terminal is instructed to access the target AN, and the access terminal is switched from the original network to the target access network, thereby reducing the entire handover delay, thereby ensuring the continuity of the user service. The method for providing inter-system handover between wireless communication networks in the embodiments of the present invention will be described in detail below with reference to a plurality of embodiments. Example 1

Referring to FIG. 5, an embodiment of the present invention provides a method for inter-system handover in a wireless communication network, and an architecture diagram of a UMB network and an HRPD network handover provided in FIG. 3 is taken as an example for performing the method provided by the embodiment of the present invention. For a detailed description, referring to FIG. 6, this embodiment also provides an interaction diagram of a method for switching between systems in a wireless communication network. Referring to FIG. 5 and FIG. 6, the following describes the method provided by the embodiment of the present invention, and the content is as follows:

Step 101: The AT pre-establishes the HRPD and PPP sessions. The details are as follows:

a: When the AT finds the HRPD channel record in the UMB neighbor list, the AT detects the edge of the UMB network and also obtains the sectorlD (sector identifier) of the neighboring HRPD AN.

b: In order to establish a session with the HRPD network, the AT obtains the Fully Qualified Domain Name (FQDN) of the selected AN, and performs a DNS (Domain Name System) query to obtain the IP address of the HRPD AN. When a request is received, the DNS looks up the IP address of the HRPD AN and sends it to the AT. Assume that the address sent to the AT is the address of the simplified AN/PCF.

c: The AT requests the UATI (Unicast Access Terminal Identifier) from the simplified AN/PCF corresponding to the IP address according to the obtained IP address.

The UATI is a user identifier for uniquely identifying the AT in the HRPD network.

d: The AT establishes a session with the simplified AN/PCF. These sessions are used for communication between the subsequent AT and HRPD networks. e: AT and simplified AN/PCF for PPP (Point-to-Point Protocol) LCP (Link Control Protocol) negotiation. Among them, the PPP protocol is a data link layer protocol that provides delivery of encapsulated network layer data packets on a point-to-point link.

f: The simplified AN/PCF generates random challenges and is sent to the AT via the CHAP Challenge challenge message.

g: When the simplified AN/PCF receives the CHAP Response response message from the AT, it sends an Access-Request access request message to the AN-AAA through the A12 interface.

h: The AN-AAA looks up the password according to the user attribute in the Access-Request message. If the authentication passes, it sends an A12 Access-Accept access message to the simplified AN/PCF.

i: After receiving the A12 Access-Accept message, the simplified AN/PCF sends a CHAP Authetication Success authentication success message to the AT, indicating that the AT access HRPD network authentication succeeds.

j: The simplified AN/PCF sends an All-Registration Request registration request message to the PDSN.

k: After determining that the All-Registration Request message is valid, the PDSN sends an All-Registration Reply registration response message to the simplified AN/PCF, where the message carries the reception indication.

1: AT and simplified AN/PCF, PDSN performs PPP connection establishment process.

At this time, AT has successfully pre-established HRPD and PPP sessions. The following steps may occur at any time after the step ". Whether the handover is performed by the eBS or the AT, the embodiment of the present invention does not limit the handover that is specifically determined by the eBS or the AT.

Step 102: When it is decided to switch to the HRPD network, the AT sends a handover request message to the HRPD network. Specifically: m: AT sends RouteUpdate and ConnectionRequest messages to the simplified AN/PCF.

The RouteUpdate is mainly used for reporting information such as pilot and strength; the ConnectionRequest is mainly used for sending a connection request;

Step 103: After the simplified handover request message received by the AN/PCF in the HRPD network, the simplified AN/PCF and the PDSN perform flow control, and send a session transfer request message to the target access network unit (ie, the target AN). The specific steps are as follows: n: After the simplified AN/PCF receives the RouteUpdate and ConnectionRequest messages, the simplified AN/PCF sends A10 Xoff to the PDSN for flow control with the PDSN. Among them, simplified AN/PCF and PDSN for flow control The purpose is to inform the PDSN to cache the downstream data.

0: After the simplified AN/PCF receives the RouteUpdate and ConnectionRequest message, it can select the appropriate real target AN according to the RouteUpdate message, and send a hard handover request message to the target AN, that is, send the A16-Session Transfer Request session transfer request. The message goes to the target AN, requesting a session transfer for the AT.

The RouteUpdate message carries the information such as the pilot, the strength, and the sector. The simplified AN/PCF can select a real target AN according to the RouteUpdate message according to its own selection policy. For example, the simplified AN/PCF is selected according to the selection. The strength information, the AN with the strongest strength is selected as the appropriate real target AN, and can also be selected by other selection strategies. Embodiments of the present invention do not limit the specific selection strategy upon which the true target AN selection is made.

The A16-Session Transfer Request message is a hard handover request, where the message includes an SSIR (Session State Information Record) of the current HRPD session, all supported features of the HRPD network, and the latest service channel. Report a message.

Step 104: After receiving the session transfer request message, the target AN allocates resources for the access terminal AT to the new sector to be handed over and sends a session transfer response message to the simplified AN/PCF. The specific content is:

P: The real target AN receives the hard handoff request message and determines that the AT will switch to the new sector of the target AN based on the latest traffic channel report message carried in the message and allocate the required resources for these sectors. The target AN receives the hard handoff request and sends an A16-Session Transfer Response session transfer response message to the simplified AN/PCF, which contains the suggested SSIR (the SSIR also contains the parameters necessary for the new sector traffic channel).

Further, if the selected target AN and the target PCF have not yet established a connection, the step "0" should also include:

q: The target AN sends an A9-Setup-A8 message to the target PCF to establish an A8 connection with a data indication. r: After receiving the A9-Setup-A8 message, the target PCF finds that there is no A10 connection of the AT, and the target PCF sends an All-Registration Request registration request message to the PDSN to establish an A10 connection, where the All-Registration Request message includes the A10 connection establishment. Air link record.

s: When the PDSN receives the All-Registration Request message, and determines that the message is valid, the PDSN receives the connection; and returns an All-Registration Reply registration response message to the target PCF, where the message carries the reception indication and the set life cycle. At this time, the binding information of the A10 connection in the PDSN has been updated, and both point to the target PCF.

When the validity of the All-Registration Request message is determined by the PDSN, for example, the association between the sequence number and the time carried in the message may be determined. If the received sequence number and time are associated with the pre-stored association of the PDSN itself, If the values are the same, the message is considered valid. Otherwise, the message is considered invalid.

t: The target PCF sends an A9-Connect-A8 message to the target AN. The above steps "q" to step "t" can be performed after the step "o" at any time before the step "kk". Step 105: After receiving the hard handover response message, the simplified AN/PCF sends a traffic channel assignment message to the AT, and sends a session transfer complete message to the target AN. The details are as follows:

u: After receiving the A16-Session Transfer Response session transfer response message, the simplified AN/PCF sends a Traffic Channel Assignment message to the AT to assign a new connection to the AT.

Among them, in order to increase the reliability, the simplified AN/PCF can repeat this step "u".

v: The simplified AN/PCF sends an A16-Session Transfer Complete session transfer completion message to the target AN. Step 106: The AT requests the PDSN to register for Mobile IP (MIP) before tuning to the HRPD. The details are as follows:

w: The AT can send a Mobile IP Registration Request or MIP registration request message to the PDSN through the tunnel before tuning to the HRPD, but the AT does not wait for the Mobile IP Registration Reply message. This step can occur after the step "u".

X: After receiving the Mobile IP Registration Request message sent by the AT, the PDSN sends a Mobile IP Registration Request, that is, a MIP registration request message, to the HA.

y: When the HA receives the Mobile IP Registration Request message from the PDSN, the HA updates the AT binding record and sends a MIP Registration Reply, ie, a MIP registration response message, to the PDSN.

In the above step "n", the simplified AN/PCF and PDSN are flow-controlled. At this time, the HRPD connection of the AT is not established, so the PDSN caches the MIP registration response message.

Step 107: The AT sends a connection close message to the eBS and instructs the AT to tune to the network of other technologies. The specific content is as follows:

z: The AT sends a ConnectionClose connection close message to the eBS in the UMB network and instructs the AT to tune to the network of other technologies. After receiving the ConnectionClose message, the eBS sends an IPT-Notification message carrying the connection close indication to all eBSs and DAPs in the active set, indicating that the connection has been closed. Wherein, this step can occur at any time after the step "w".

Step 108: The AT tunes to the HRPD, and the target AN captures the AT. If the target AN receives the MIP registration response message from the PDSN, the MIP registration response message is forwarded to the AT, and the AT starts to send and receive data packets from the network. Specific steps are as follows:

Aa: The AT tunes to HRPD and the target AN captures AT.

Bb: After the target AN captures the AT, the target AN sends an A9-AL Connected message to the target PCF.

Cc: After receiving the A9-AL Connected message, the target PCF sends an All-Registration Request registration request message to the PDSN, and includes an activation start airlink record in the message, the All-Registration Request specific Active Start is used to activate the PDSN, and the PDSN is notified to release the cached data.

Dd: After receiving the All-Registration Request message, the PDSN sends an All-Registration Reply registration response message to the target PCF. After this step, the PDSN no longer caches the data and sends it to the target PCF when it arrives.

Ee: After receiving the All-Registration Reply message, the target PCF sends an A9-AL Connected Ack message to the target AN to respond to the A9-AL Connected message.

Ff: If the simplified AN/PCF and target AN are on different subnets, the target AN assigns a new UATI to the AT. Those skilled in the art will appreciate that the generally simplified AN/PCF and target AN are located in different location areas, i.e., the simplified AN/PCF and target AN are located under different subnets.

Gg: The PDSN forwards the buffered MIP Registration Reply message to the target AN. This step is performed after the step "dd".

Hh: The destination AN receives the MIP Registration Reply message sent by the PDSN and forwards the message to the AT. when

After receiving the message, the AT can send the data packet to the network side, and can also receive the data packet from the network side.

Step 109: The simplified AN/PCF disconnects from the PDSN and clears the session associated with the AT. The specific content is as follows:

Ii: After the target AN captures the AT, and confirms that the AT accesses the HRPD system through the target AN, the target AN sends an A16-Session Release Indication session release indication message to the simplified AN/PCF, indicating that the AT session has been Under the control of the target AN, the simplified AN/PCF can thus disconnect the PDSN and clear the session associated with the AT.

Jj: The simplified AN/PCF sends an A16-Session Release Indication Ack Session Release Indication Response message to the target AN.

Kk: The PDSN sends an All-Registration Update registration update message to the simplified AN/PCF, which is used to initiate the A10 connection to close and simplify the AN/PCF. Wherein, the step "kk" can occur at any time after the step "s".

11: The simplified AN/PCF sends an All-Registration Acknowledge message to the PDSN to respond to the All-Registration Update message.

Mm: After the simplified AN/PCF receives the A16-Session Release Indication message, the simplified AN/PCF sends an All-Registration Request message to the PDSN and sets the lifetime to zero.

Nn: The PDSN sends an All-Registration Reply message to the simplified AN/PCF, and the simplified AN/PCF closes the A10 connection of the AT.

The method provided by the embodiment of the present invention completes the UMPD and the PPP session on the premise that the AT has successfully pre-established the HRPD and the PPP session, and when the UOB network is decided to switch to the HRPD network, the UMB is completed by the simplified AN/PCF hard handover to the real target AN. The handover process from the network to the HRPD network can greatly shorten the entire handover delay and ensure the connection of user services. Continuity, greatly reducing user interruptions, giving users a better experience, especially for services such as voice that require high latency, greatly enhancing the user's satisfaction with the service provided by the operator. Example 2

The embodiment of the present invention provides a method for inter-system handover in a wireless communication network, and the architecture diagram of the UMB network and the HRPD network handover provided in FIG. 3 is taken as an example. The difference between this embodiment and the embodiment 1 is that After the HRPD and the PPP session are successfully pre-established, the AT sends a handover request message to the HRPD network, and the handover request message is specifically a RouteUpdate and HandoffRequest message.

That is, the step "m" is: When it is decided to switch to HRPD, the AT sends a RouteUpdate and HandoffRequest switch request message to the HRPD AN.

Correspondingly, the step "u" is specifically as follows: The simplified AN/PCF sends a HandoffResponse handover response message and a TrafficChannelAs signment message to the AT, wherein the HandoffResponse message is used to respond to the HandoffRequest message, and the TrafficChannelAssignment message is used to assign a new connection to the AT.

FIG. 7 is a schematic diagram of interaction of a method for switching between systems in a wireless communication network according to an embodiment of the present invention. The interaction process is as follows:

a: When the AT finds an HRPD channel record in the UMB neighbor list, the AT detects the edge of the UMB network, and AT also obtains the sectorlD (sector identifier) of the neighboring HRPD AN.

b: In order to establish a session with the HRPD network, the AT obtains the FQDN of the selected AN, and a DNS query occurs to obtain the IP address of the HRPD AN. When receiving the request, the DNS service looks up the IP address of the HRPD AN and sends it to the terminal. It is assumed here that the returned address is the simplified AN/PCF address.

c: AT requests UATI from the simplified AN/PCF.

d: AT establishes a session with the simplified AN/PCF, which are used for communication between subsequent AT and HRPD networks.

e: AT and simplified AN/PCF for PPP and LCP negotiation.

f; The simplified AN/PCF generates random challenges and is sent to the AT via a CHAP challenge message.

g: When the simplified AN/PCF receives the CHAP response message from the AT, it sends an Access-Request message to the lj AN-AAA through the A12 interface.

h: AN-AAA looks up the password according to the user attribute in the Access-Request message. If the authentication passes, it sends an Access-Accept message back to the simplified AN/PCF.

i: After receiving the Access-Accept message, the simplified AN/PCF returns an indication of successful access authentication to the AT. j: The simplified AN/PCF sends an All-Registration Request message to the PDSN. k: When the registration request is valid, the PDSN replies to the simplified AN/PCF with an All-Registration Reply message and carries a reception indication.

1: AT and AN/PCF, PDSN performs PPP connection establishment process.

At this time, AT has successfully pre-established HRPD and PPP sessions. The following steps can occur at any time after the step. It is up to eBS or AT to decide whether to switch.

m: When deciding to switch to HRPD, the AT sends a RouteUpdate and HandoffRequest message to the HRPD AN. n: When receiving this message, the simplified AN/PCF and PDSN are streamed.

0: When the simplified AN/PCF receives the RouteUpdate and HandoffRequest messages, the simplified AN/PCF decides to initiate a hard handoff process to the real target AN. The simplified AN/PCF sends an A16-Session Transfer Request message to the real target AN, requesting a session transfer for the AT. This message contains the SSIR (Session Status Information Record) of the current HRPD session and all supported features. The latest traffic channel report message is also encapsulated in the message, indicating a hard handoff request. The simplified AN/PCF can select the appropriate target AN based on the RouteUpdate message.

p: The real target The AN determines from the latest Traffic Channel Report message that the AT will switch to the new sector of the target AN and allocate the required resources for these sectors. The target AN receives the hard handoff request and sends an A16-Session Transfer Response message to the simplified AN/PCF, which contains the suggested SSIR (which also contains the parameters necessary for the new sector traffic channel).

Step "q" to step Ύ "Can be performed after step "0" at any time before step "kk".

q: The target AN sends an A9-Setup-A8 message to the target PCF to establish an A8 connection and carries a data indication.

r: The target PCF finds that there is no A10 connection for the AT, and the target PCF sends an All-Registration Request message to

The PDSN establishes an A10 connection. The All-Registration Request message contains an A10 connection to establish an airlink record.

s: When the All-Registration Request message is valid, the PDSN receives the connection and replies to the target PCF

The All-Registration Reply message, with the life cycle of receiving indications and settings. At this time, the binding information of the A10 connection in the PDSN has been updated, and both point to the target PCF.

t: Target The PCF sends an A9-Connect-A8 message to the target AN.

u: Simplified AN/PCF sends HandoffResponse and TrafficChannelAssignment messages to AT, TrafficChannelAssignment message assigns a new connection to AT. This step can occur at any time after the step "p". To increase reliability, the simplified AN/PCF can repeat this step.

V: Simplified AN/PCF sends an A16-Session Transfer Complete message to the target AN.

w: AT can tunnel the Mobile IP Registration Request message to the PDSN before tuning to HRPD, but the AT does not wait for the Registration Reply message. This step can occur after the step "u".

x: The PDSN sends a Mobile IP Registration Request message to the HA. y: When the HA receives the registration request message from the PDSN, the HA updates the binding record of the AT, and sends a MIP Registration Reply message back to the PDSN. Since the HRPD connection of the AT is not established, the PDSN caches the message.

z: The AT sends ConnectionClose to the eBS and instructs the AT to tune to the network of other technologies. Upon receiving the message, the eBS sends an IPT-Notification message carrying the connection close indication to all eBSs and DAPs in the active set, indicating that the connection has been closed. This step can occur at any time after the step "w".

Aa: AT tunes to HRPD, and target AN captures AT.

Bb: When the target AN captures the AT, the target AN sends an A9-AL Connected message to the target PCF.

Cc: After receiving the A9-AL Connected message, the target PCF sends an All-Registration Request message to

The PDSN, and the activation start airlink record is included in the message.

Dd: After receiving the All-Registration Request message, the PDSN sends an All-Registration Reply message to the target PCF. After this step, the PDSN no longer caches the data and sends it to the PCF when it arrives.

Ee: After receiving the All-Registration Reply message, the PCF sends an A9-AL Connected Ack message to respond.

A9-AL Connected message.

Ff: If the simplified AN/PCF and target AN are on different subnets, the target AN assigns a new UATI to the AT. Gg: The PDSN forwards the buffered MIP Registration Reply message to the target AN. This step is performed after the step "dd".

Hh: The destination AN forwards the MIP Registration Reply message to the AT. When the AT receives the message, the AT can send a data packet to the network side, and can also receive the data packet from the network side.

Ii: After the target AN captures the AT and confirms that the AT accesses the system through the target AN, the target AN sends an A16-Session Release Indication message to the simplified AN/PCF. The message indicates that the AT session is already under the control of the target AN, so the simplified AN/PCF can disconnect the PDSN and clear the session associated with the AT.

Jj: Simplified AN/PCF sends the A16-Session Release Indication Ack message back to the target AN.

The step "kk" can occur at any time after the step "s".

Kk: The PDSN initiates the shutdown and simplification of the A10 connection of the AN/PCF by sending an All-Registration Update message. 11: Simplified AN/PCF response All-Registration Acknowledge message.

Mm: After receiving the A16-Session Release Indication message, the simplified AN/PCF sends an All-Registration Request message to the PDSN and sets the lifetime to 0.

The method provided by the embodiment of the present invention, when the AT has successfully pre-established the HRPD and the PPP session, when the decision is made to switch from the UMB network to the HRPD network, the method of hardly switching to the real target AN by the simplified AN/PCF is completed. The switching process from the UMB network to the HRPD network can greatly shorten the entire handover delay, ensure the continuity of the user service, greatly reduce the user interruption, and give the user a better experience, especially for the voice and the like. The business has greatly enhanced the user's satisfaction with the service provided by the operator. Example 3

Referring to FIG. 8 , an embodiment of the present invention provides a method for inter-system handover in a wireless communication network, and the architecture diagram of the UMB network and the HRPD network handover provided in FIG. 3 is taken as an example. The embodiment and the embodiment 1 are described. The difference from Embodiment 2 is that after the HRPD and the PPP session have been successfully pre-established by the AT, after the switch to the HRPD network is determined, when the simplified AN/PCF of the HRPD receives the handover request message sent by the AT, it does not need to The PDSN sends A10 Xoff for flow control. In order to describe the method provided by the embodiment of the present invention in detail, referring to FIG. 9 , this embodiment also provides an interaction diagram of a method for switching between systems in a wireless communication network. Referring to FIG. 8 and FIG. 9 , the following provides an embodiment of the present invention. The method is described in detail, and the specific contents are as follows:

Step 301: The AT pre-establishes the HRPD and PPP sessions. The details are as follows:

h: The AN-AAA looks up the password according to the user attribute in the Access-Request message. If the authentication passes, it sends an A12 Access-Accept access message to the simplified AN/PCF. i: After receiving the A12 Access-Accept message, the simplified AN/PCF sends a CHAP Authetication Success authentication success message to the AT, indicating that the AT access HRPD network authentication succeeds.

Step 302: When it is decided to switch to the HRPD network, the AT sends a handover request message to the HRPD network. Specifically: m: AT sends RouteUpdate and ConnectionRequest messages to the simplified AN/PCF.

Step 203: After the simplified handover request message received by the AN/PCF in the HRPD network, send a session transfer request message to the target AN. Specific steps are as follows:

n: After the simplified AN/PCF receives the RouteUpdate and ConnectionRequest message, it can select the appropriate real target AN according to the RouteUpdate message, and send a hard handover request message to the target AN, that is, send the A16-Session Transfer Request session transfer request. The message goes to the target AN, requesting a session transfer for the AT.

The A16-Session Transfer Request message is a hard handover request, where the message includes the SSIR (session state information record) of the current HRPD session, all supported features of the HRPD network, and the latest service channel report message.

Step 304: After receiving the session transfer request message, the target AN allocates resources for the access terminal AT in the new sector to be handed over and sends a session transfer response message to the simplified AN/PCF. The specific content is:

0: The real target AN receives the hard handover request message, and determines that the AT will switch to the new sector of the target AN according to the latest traffic channel report message carried in the message, and allocates the required resources for these sectors. The target AN receives the hard handover request and sends an A16-Session Transfer Response session transfer response message to the simplified AN/PCF, the message containing The proposed SSIR (the SSIR also contains the parameters necessary for the new sector traffic channel).

Further, if the selected target AN and the target PCF have not yet established a connection, the step "n" should also include:

p: Target The AN sends an A9-Setup-A8 message to the target PCF to establish an A8 connection with data indication. q: After receiving the A9-Setup-A8 message, the target PCF finds that there is no A10 connection of the AT, and the target PCF sends an All-Registration Request registration request message to the PDSN to establish an A10 connection, where the All-Registration Request message includes the A10 connection establishment. Air link record.

r: The PDSN receives the All-Registration Request message, and determines that the PDSN receives the connection when the message is valid; and returns an All-Registration Reply registration response message to the target PCF, where the message carries the reception indication and the set life cycle. At this time, the binding information of the A10 connection in the PDSN has been updated, and both point to the target PCF. After this step is completed, if the PDSN has data for the AT, all data is sent to the target PCF.

s: Target The PCF sends an A9-Connect-A8 message to the target AN.

The above step "p" to step "s" can be performed after step "n" at any time before step "f".

Step 305: After receiving the session transfer response message, the simplified AN/PCF sends a traffic channel assignment message to the AT, and sends a session transfer complete message to the target AN. The details are as follows:

t: After the simplified AN/PCF receives the A16-Session Transfer Response (ie, the session transfer response message), it sends a Traffic Channel Assignment message to the AT to assign a new connection to the AT.

Among them, in order to increase the reliability, the simplified AN/PCF can repeat this step "t".

u: The simplified AN/PCF sends an A16-Session Transfer Complete session transfer completion message to the target AN. Step 306: The AT applies for MIP registration to the PDSN before tuning to the HRPD, and the target AN caches the PDSN.

MIP response message. The details are as follows

V: The AT can send a Mobile IP Registration Request to the PDSN through the tunnel before tuning to the HRPD.

The MIP registers the request message, but the AT does not wait for the Mobile IP Registration Reply message. This step can occur after the step "t".

w: After receiving the Mobile IP Registration Request message sent by the AT, the PDSN sends a Mobile IP Registration Request MIP registration request message to the HA.

x: When the HA receives the Mobile IP Registration Request message from the PDSN, the HA updates the AT binding. Record and send a MIP Registration Reply, MIP registration response message, to the PDSN.

y: After performing the above step "r", the PDSN forwards the MIP Registration Reply message to the target AN.

Step 307: The AT sends a connection close message to the eBS, and instructs the AT to tune to the network of other technologies. The specific content is as follows:

z: The AT sends a ConnectionClose connection close message to the eBS in the UMB network and instructs the AT to tune to the network of other technologies. After receiving the ConnectionClose message, the eBS sends an IPT-Notification message carrying the connection close indication to all eBSs and DAPs in the active set, indicating that the connection has been closed. Wherein, this step can occur at any time after the step 'V'.

Step 308: The AT tunes to the HRPD, the target AN captures the AT, and the target AN forwards the buffered MIP registration response message to the AT, and the AT starts to send and receive data packets from the network. Specific steps are as follows:

Aa: AT tunes to HRPD, and target AN captures AT.

Bb: If the simplified AN/PCF and target AN are on different subnets, the target AN assigns a new UATI to the AT. Cc: After the target AN captures the AT, the target AN forwards the MIP Registration Reply message to the AT. When the AT receives the message, the AT can send a data packet to the network side, and can also receive the data packet from the network side.

Step 309: The simplified AN/PCF disconnects from the PDSN and clears the session associated with the AT. The specific content is as follows:

Dd: After the target AN captures the AT and confirms that the AT accesses the system through the target AN, the target AN sends an A16-Session Release Indication message to the simplified AN/PCF. The message indicates that the AT session is already under the control of the target AN, so the simplified AN/PCF can disconnect the PDSN and clear the session associated with the AT.

Ee: Simplified AN/PCF sends the A16-Session Release Indication Ack message back to the target AN.

Ff: The PDSN initiates the shutdown and simplification of the A10 connection of the AN/PCF by sending an All-Registration Update message. Gg: Simplified AN/PCF response All -Registration Acknowledge message.

Hh: After receiving the A16-Session Release Indication message, the simplified AN/PCF sends an All-Registration Request message to the PDSN and sets the lifetime to 0.

Ii: The PDSN sends an All-Registration Reply message to the simplified AN/PCF, and the simplified AN/PCF closes the A10 connection of the AT.

The method provided by the embodiment of the present invention completes the UMPD and the PPP session on the premise that the AT has successfully pre-established the HRPD and the PPP session, and when the UOB network is decided to switch to the HRPD network, the UMB is completed by the simplified AN/PCF hard handover to the real target AN. The switching process from the network to the HRPD network can greatly shorten the entire handover delay, ensure the continuity of the user service, greatly reduce the user interruption, and give the user a better experience, especially for services with high latency requirements such as voice. , Greatly enhance the user's satisfaction with the service provided by the operator _; Embodiment 4

The embodiment of the present invention provides a method for inter-system handover in a wireless communication network, and the architecture diagram of the UMB network and the HRPD network handover provided in FIG. 3 is taken as an example. The difference between this embodiment and the third embodiment is that After the HRPD and the PPP session are successfully pre-established, the AT sends a handover request message to the HRPD network, and the handover request message is specifically a RouteUpdate and HandoffRequest message.

Correspondingly, the step "t" is specifically as follows: The simplified AN/PCF sends a HandoffResponse handover response message and a TrafficChannelAs signment message to the AT, wherein the HandoffResponse message is used to respond to the HandoffRequest message, and the TrafficChannelAssignment message is used to assign a new connection to the AT.

FIG. 10 is a schematic diagram of interaction of a method for switching between systems in a wireless communication network according to an embodiment of the present invention. The interaction process is as follows:

c: AT requests UATI from the simplified AN/PCF.

e: AT and simplified AN/PCF for PPP and LCP negotiation.

f: The simplified AN/PCF generates random challenges and is sent to the AT via a CHAP challenge message.

i; After receiving the Access-Accept message, the simplified AN/PCF returns an indication of successful access authentication to the AT. j: The simplified AN/PCF sends an All-Registration Request message to the PDSN.

k: When the registration request is valid, the PDSN replies to the simplified AN/PCF with an All-Registration Reply message and carries a reception indication. 1: AT and AN/PCF, PDSN performs PPP connection establishment process.

m: When deciding to switch to HRPD, the AT sends a RouteUpdate and HandoffRequestConnectionRequest message to lj HRPD AN.

n: When the simplified AN/PCF receives the RouteUpdate and HandoffRequest messages, the simplified AN/PCF decides to initiate a hard handoff process to the real target AN. The simplified AN/PCF sends an A16-Session Transfer Request message to the real target AN, requesting a session transfer for the AT. This message contains the SSIR (Session Status Information Record) of the current HRPD session and all supported features. The latest traffic channel report message is also encapsulated in the message, indicating a hard handoff request. The simplified AN/PCF can select the appropriate target AN based on the RouteUpdate message.

0: Real target The AN determines from the latest Traffic Channel Report message that the AT will switch to the new sector of the target AN and allocate the required resources for these sectors. The target AN receives the hard handoff request and sends an A16-Session Transfer Response message to the simplified AN/PCF, which contains the suggested SSIR (which also contains the parameters necessary for the new sector traffic channel).

The step "p" to the step "s" can be performed after the step "n" and at any time before the step "f".

p: The target AN sends an A9-Setup-A8 message to the target PCF to establish an A8 connection and carries a data indication.

q: The target PCF finds that there is no A10 connection for the AT, and the target PCF sends an All-Registration Request message to

r: When the All-Registration Request message is valid, the PDSN receives the connection and replies to the target PCF.

The All-Registration Reply message, with the life cycle of receiving indications and settings. At this time, the binding information of the A10 connection in the PDSN has been updated, and both point to the target PCF. After this step is completed, if the PDSN has the AT data, it is sent to the target PCF.

s: Target PCF sends an A9-Connect-A8 message to the target AN.

t: Simplified AN/PCF sends HandoffResponse and TrafficChannelAs signment messages to AT, TrafficChannelAssignment message assigns a new connection to AT. This step can occur at any time after the step "o". To increase reliability, the simplified AN/PCF can repeat this step.

u: The simplified AN/PCF sends an A16-Session Transfer Complete message to the target AN.

v: The AT can tunnel the Mobile IP Registration Request message to the PDSN before tuning to the HRPD, but the AT does not wait for the Registration Reply message. This step can occur after step "t".

w: The PDSN sends a Mobile IP Registration Request message to the HA.

x: After the HA receives the registration request message from the PDSN, the HA updates the binding record of the AT and sends the MIP. The Registration Reply message is returned to the PDSN.

y: After performing step "r", the PDSN forwards the MIP Registration Reply message to the target AN.

z: The AT sends ConnectionClose to the eBS and instructs the AT to tune to the network of other technologies. Upon receiving the message, the eBS sends an IPT-Notification message carrying the connection close indication to all eBSs and DAPs in the active set, indicating that the connection has been closed. This step can occur at any time after step 'V'.

Aa: AT tunes to HRPD, and target AN captures AT.

Dd: When the target AN captures the AT, and confirms that the AT accesses the system through the target AN, the target AN sends

A16-Session Release Indication message to the simplified AN/PCF. The message indicates that the AT session is already in the target

Under the control of the AN, the simplified AN/PCF can disconnect the PDSN and clear the session associated with the AT.

The step "ff" can occur at any time after the step "r".

The method provided by the embodiment of the present invention completes the UMPD and the PPP session on the premise that the AT has successfully pre-established the HRPD and the PPP session, and when the UOB network is decided to switch to the HRPD network, the UMB is completed by the simplified AN/PCF hard handover to the real target AN. The switching process from the network to the HRPD network can greatly shorten the entire handover delay, ensure the continuity of the user service, greatly reduce the user interruption, and give the user a better experience, especially for services with high latency requirements such as voice. , greatly enhanced the user's satisfaction with the service provided by the operator. Example 5

Referring to FIG. 11, an embodiment of the present invention provides a handover system, where the system includes: a simplified access network/packet control function unit AN/PCF 501 and a target AN 502, and the simplified AN/PCF 501 and target AN 502 are located at a target access. In the network, among them, The simplified AN/PCF 501 is configured to receive a handover request message sent by the terminal, search the target AN 502 according to the handover request message, send a session transfer request message to the found target AN 502, and also receive the session transfer response returned by the target AN 502. After the message, the terminal is instructed to access the target AN 502, and the terminal is switched from the original network to the target access network;

The target AN502 is configured to receive the session transfer request message sent by the simplified AN/PCF 501, and return a session transfer response message to the simplified AN/PCF 501, and is also used for receiving the access of the terminal under the simplified AN/PCF 501 indication.

Further, referring to FIG. 12, the system provided by the embodiment of the present invention further includes a packet data serving node PDSN 503; a PDSN 503, configured to receive a MIP registration request of the terminal, and return a MIP registration response message to the target AN 502: also used for simplified AN/ PCF501 performs flow control,

Correspondingly, the simplified AN/PCF 501 is specifically configured to receive a handover request message sent by the terminal, and the PDSN 503 performs flow control, and searches for the target AN 502 according to the handover request message, and sends a session transfer request message to the target AP 502. After receiving the session transfer response message returned by the target AN 502, the service channel assignment message is sent to the terminal, and the session transfer complete message is sent to the target AN 502. The target AN is used to receive the access of the terminal under the simplified AN/PCF 501 indication. For the terminal to allocate resources to the new sector to be switched to; after the terminal tunes to the target access network, after the terminal is captured and receives the MIP registration response message returned by the PDSN 503, the MIP registration response message is forwarded to the terminal.

Further, when flow control is not required between the simplified AN/PCF 501 and the PDSN 503,

The PDSN 503 is configured to receive a MIP registration request of the terminal, and is further configured to return a MIP registration response message to the target AN502.

Correspondingly, the simplified AN/PCF 501 is specifically configured to receive a handover request message sent by the terminal, search the target AN 502 according to the handover request message, send a session transfer request message to the search target AN 502, and also be used to receive the session returned by the target AN 502. After transmitting the response message, sending a traffic channel assignment message to the terminal, and sending a session transfer complete message to the target AN 502;

The target AN 502 is configured to: after receiving the session transfer request message, allocate a resource to the new sector to be switched to the terminal, and send a session transfer response message to the simplified AN/PCF 501; and further, use the MIP registration response message that is sent by the PDSN 503; After the terminal is used to capture the terminal, the MIP registration response message is forwarded to the terminal, so that the terminal is switched from the original network to the target access network;

The terminal needs to establish an HRPD session with the simplified AN/PCF 501 and a point-to-point protocol PPP session with the packet data serving node PDSN 503 before sending the handover request.

Further, after the terminal accesses the target AN 502, the simplified AN/PCF 501 is also used to disconnect from the PDSN. Connect, and clear the session of the access terminal.

The handover system provided by the embodiment of the present invention, when the AT has successfully pre-established the HRPD and the PPP session, when the decision is made to switch from the UMB network to the HRPD network, the method of hard handover to the real target AN by the simplified AN/PCF is performed. The process of switching from the UMB network to the HRPD network can greatly shorten the entire handover delay, ensure the continuity of user services, greatly reduce user interruption, and provide users with a better experience, especially for voice and other delays. The business has greatly enhanced the user's satisfaction with the service provided by the operator.

Example 6

Referring to FIG. 13, an embodiment of the present invention provides a simplified access network/packet control function unit AN/PCF, and the simplified AN/PCF includes:

The receiving module 601 is configured to receive a handover request message sent by the terminal.

The processing module 602 is configured to: after receiving the handover request message, the receiving module 601 searches for the target AN according to the handover request message, and sends a session transfer request message to the found target AN, and after receiving the session transfer response message returned by the target AN, , indicating that the terminal accesses the target AN.

The simplified AN/PCF processing module 602 specifically includes: when the simplified AN/PCF needs to be flow-controlled with the PDSN,

The first processing unit 6021 is configured to: after receiving the handover request message, the receiving module 601 performs flow control with the PDSN, and searches for the target AN according to the handover request message, and sends a session transfer request message to the found target AN;

The second processing unit 6022 is configured to receive a session transfer response message returned by the target AN, send a traffic channel assignment message to the terminal, and send a session transfer complete message to the target AN.

When the simplified AN/PCF does not need to be flow-controlled with the PDSN, the simplified AN/PCF processing module 602 specifically includes:

The third processing unit 6023 is configured to: after receiving the handover request message, the receiving module 601 searches for the target AN according to the handover request message, and sends a session transfer request message to the target AP.

The fourth processing unit 6024 is configured to receive a session transfer response message returned by the target AN, send a traffic channel assignment message to the terminal, and send a session transfer complete message to the target AN.

Further, the simplified AN/PCF provided by the embodiment of the present invention further includes:

The session establishing module 603 is configured to establish an HRPD session with the terminal before receiving the handover request message sent by the terminal with the receiving module 601.

The connection disconnection module 604 is configured to disconnect the PDSN after the processing module 602 indicates that the terminal accesses the target AN.

The simplified access network/packet control function unit AN/PCF provided by the embodiment of the present invention has been successfully pre-established at the AT. Under the premise of HRPD and PPP session, when it is decided to switch from the UMB network to the HRPD network, the simplified AN/PCF hard handover to the real target AN completes the handover process of the UMB network to the HRPD network, which can greatly shorten the whole process. Switching delay ensures the continuity of user services, greatly reduces user interruption, and gives users a better experience, especially for services such as voice that require high latency, which greatly enhances users' satisfaction with service provided by operators. degree.

Example 7

The embodiment of the present invention provides a target AN for receiving a simplified AN/PCF session transfer request message; and sending a session transfer response message to the simplified AN/PCF.

Among them, the target AN specifically includes:

The first processing module 701 is configured to: after receiving the session transfer request message sent by the simplified AN/PCF, allocate resources to the new sector to be switched, and send a session transfer response message to the simplified AN/PCF;

The second processing module 702 is configured to: after the terminal is tuned to the target access network, after the terminal is captured and receives the MIP registration response message returned by the PDSN, the MIP registration response message is forwarded to the terminal, and the terminal is switched from the original network to the target interface. Into the network;

Among them, the target AN specifically includes:

The third processing module 703 is configured to: after receiving the session transfer request message, allocate resources to the new sector to be switched, and send a session transfer response message to the simplified AN/PCF;

The fourth processing module 704 is configured to receive and cache the MIP registration response message sent by the PDSN. After the terminal is captured, the MIP registration response message is forwarded to the terminal, so that the terminal is switched from the original network to the target access network.

The target AN provided by the embodiment of the present invention, when the AT has successfully pre-established the HRPD and the PPP session, when the decision is made to switch from the UMB network to the HRPD network, the method of hardly switching to the real target AN through the simplified AN/PCF The process of switching from the UMB network to the HRPD network can greatly shorten the entire handover delay, ensure the continuity of user services, greatly reduce user interruption, and provide users with a better experience, especially for voice and other delays. The business has greatly enhanced the user's satisfaction with the service provided by the operator.

In summary, the technical solution provided by the embodiment of the present invention completes the handover process of the UMB network to the HRPD network by the simplified method of the AN/PCF hard handover to the real target AN, which can greatly shorten the entire handover delay and ensure the user. The continuity of the service greatly reduces the user interruption and gives the user a better experience, especially for services such as voice that have high latency requirements, which greatly enhances the user's satisfaction with the service provided by the operator.

The term "receiving" in the embodiment of the present invention may be understood as being actively acquired from other modules or receiving information transmitted by other modules.

A person skilled in the art can understand that the drawings are only a schematic diagram of a preferred embodiment, and the modules or processes in the drawings are not necessarily required to implement the invention. Those skilled in the art can understand that the modules in the apparatus in the embodiment may be distributed in the apparatus of the embodiment according to the embodiment, or may be correspondingly changed in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

Some of the steps in the embodiment of the present invention may be implemented by using software, and the corresponding software program may be stored in a readable storage medium, such as an optical disk or a hard disk.

The above is only a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, and improvements made by those skilled in the art without departing from the principles of the present invention. And so on, should be included in the scope of protection of the present invention.

Claims

Rights request

A method for switching between systems of a wireless communication network, the method comprising:

The simplified access network/packet control function unit AN/PCF in the target access network receives the handover request message from the terminal, selects the target AN according to the handover request message, and sends a session transfer request message to the selected target AN;

The simplified AN/PCF receives a session transfer response message from the target AN indicating that the terminal is accessing the target AN.

2. The method for inter-system handover of a wireless communication network according to claim 1, wherein the handover request message is a route update message RouteUpdate and a connection request message ConnectionRequest;

Or

Route update message RouteUpdate and switch request message HandoffRequest.

The method for inter-system handover of a wireless communication network according to claim 1 or 2, wherein the step of indicating that the terminal accesses the target AN is specifically:

Transmitting a traffic channel assignment message to the terminal indicates that the terminal accesses the target AN.

The method for switching between the systems of the wireless communication network system according to claim 1, wherein the step of selecting the target AN according to the switching request message further includes:

The simplified AN/PCF and the packet data serving node PDSN perform flow control;

After the simplified AN/PCF sends the session transfer request message to the selected target AN, the method specifically includes: after receiving the session transfer request message, the target AN allocates resources for the new sector to be switched to by the terminal;

The terminal that is tuned to the target access network after the connection is disconnected from the original network.

The method for inter-system handover of a wireless communication network according to claim 1, wherein after the simplified AN/PCF sends a session transfer request message to the selected target AN, the method specifically includes:

After receiving the session transfer request, the target AN allocates resources for the new sector to be switched to the terminal; the target AN receives and caches the PDSN issued by the terminal after applying for MIP registration to the PDSN. MIP response message;

A terminal that disconnects from the original network and tunes to the target access network is captured, and the cached MIP registration response message is forwarded to the terminal.

The method for inter-system handover of a wireless communication network according to any one of claims 1 to 5, wherein the simplified access network/packet control function unit AN/PCF in the target access network receives from The terminal's handover request message also includes: Establishing a simplified AN/PCF high speed packet data HRPD session in the terminal and target access network, and a point-to-point protocol PPP session of the terminal and packet data serving node PDSN.

The method for inter-system handover of a wireless communication network according to claim 6, wherein the method further comprises: after the simplified AN/PCF indicates that the terminal accesses the target AN, The simplified AN/PCF disconnects from the PDSN.

A handover system, characterized in that the system comprises: a simplified access network/packet control function unit AN/PCF and a target AN, the simplified AN/PCF and the target AN being located in the target access network;

The switching system according to claim 8, wherein the system further comprises: a packet data serving node PDSN;

The PDSN is configured to receive a MIP registration request message of the terminal, return the MIP registration response message to the target AN, and further perform flow control with the simplified AN/PCF;

The simplified AN/PCF is further configured to perform flow control with the PDSN;

The target AN is configured to accept access by the terminal under the simplified AN/PCF indication, specifically for allocating resources for the terminal to be switched to a new sector; when the terminal tunes to After the target accesses the network, after the terminal is captured and receives the MIP registration response message returned by the PDSN, the MIP registration response message is forwarded to the terminal.

The switching system according to claim 8, wherein the system further comprises: a PDSN, wherein the PDSN is configured to receive a MIP registration request message of the terminal, and return the MIP registration response message;

The target AN is configured to receive the access of the terminal under the simplified AN/PCF indication, specifically, to allocate resources to the new sector to be switched to by the terminal, and receive and cache the PDSN. The MIP registration response message is further used to: after the terminal is captured, forward the MIP registration response message to the terminal.

11. A simplified access network/packet control functional unit AN/PCF, characterized in that said simplified AN/PCF comprises:

a receiving module, configured to receive a handover request message from the terminal; a processing module, configured to: after the receiving module receives the handover request message, select a target AN according to the handover request message, and send a session transfer request message to the selected target AN, and receive the return of the target AN After the session transfer response message, the terminal is instructed to access the target AN.

The simplified AN/PCF according to claim 11, wherein the simplified processing module of the AN/PCF specifically includes:

a first processing unit, configured to: after the receiving module receives the handover request message, perform flow control with the PDSN, and select a target AN according to the handover request message, and send a session transfer request message to the selected target AN;

And a second processing unit, configured to receive a session transfer response message returned by the target AN, send a service channel assignment message to the terminal, and send a session transfer complete message to the target AN.

a third processing unit, configured to: after the receiving module receives the handover request message, select a target AN according to the handover request message, and send a session transfer request message to the selected target AN;

And a fourth processing unit, configured to receive a session transfer response message returned by the target AN, send a service channel assignment message to the terminal, and send a session transfer complete message to the target AN.

The simplified AN/PCF according to claim 12, wherein the simplified AN/PCF further comprises: a session establishing module, configured to: before the receiving module receives the handover request message sent by the terminal, and The terminal establishes a high speed packet data HRPD session;

And a connection disconnecting module, configured to disconnect the connection with the PDSN after the processing module instructs the terminal to access the target AN.

15. A target AN, wherein the target AN is configured to receive a simplified AN/PCF session transfer request message; and send a session transfer response message to the simplified AN/PCF.

The target AN according to claim 15, wherein the target AN specifically includes:

a first processing module, configured to: after receiving the simplified session transfer request message sent by the AN/PCF, allocate resources to the new sector to be switched, and send a session transfer to the simplified AN/PCF Response message

The second processing module is configured to: after the terminal is tuned to the target access network, after the terminal is captured and receives the MIP registration response message returned by the PDSN, forward the MIP registration response message to the terminal.

a third processing module, configured to: after receiving the session transfer request message, allocate resources to the new sector to be switched, and send a session transfer response message to the simplified AN/PCF;

a fourth processing module, configured to receive and cache a MIP registration response message delivered by the PDSN, and is further configured to capture the terminal Afterwards, forwarding the MIP registration response message to the terminal _;