CN107295511B - WLAN terminal, base station and method for controlling switching from LTE network to WLAN network - Google Patents

WLAN terminal, base station and method for controlling switching from LTE network to WLAN network Download PDF

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Publication number
CN107295511B
CN107295511B CN201610200772.9A CN201610200772A CN107295511B CN 107295511 B CN107295511 B CN 107295511B CN 201610200772 A CN201610200772 A CN 201610200772A CN 107295511 B CN107295511 B CN 107295511B
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user equipment
information
authentication
wlan
base station
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CN107295511A (en
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邓云
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface

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  • Mobile Radio Communication Systems (AREA)

Abstract

A method for controlling the switching of a WLAN terminal, a base station and an LTE network to the WLAN network comprises the following steps: when receiving a switching request sent by a base station, analyzing identification information of user equipment from the switching request; sending the identification information of the user equipment to a Home Subscriber Server (HSS) through an AAA server so that the HSS authenticates the user equipment to generate authentication information of the user equipment, and the AAA server generates corresponding authentication associated information based on the authentication information; when receiving the authentication associated information sent by the AAA server, storing the authentication associated information; and when the access of the user equipment is determined, the authentication associated information is sent to the user equipment, so that the user equipment can access the WLAN network by using the authentication associated information. By the scheme, the time of access authentication in the process of switching from LTE to WLAN can be saved, and the use experience of a user is improved.

Description

WLAN terminal, base station and method for controlling switching from LTE network to WLAN network
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a WLAN terminal, a base station, and a method for controlling handover from an LTE network to a WLAN network.
Background
Long Term Evolution (LTE) and Wireless Local Area Network (WLAN) Aggregation (LWA), which is a method in which a base station configures a user equipment (UE Termination, abbreviated as UE) to simultaneously use radio resources of LTE and WLAN for data transmission when the UE is in a radio resource control connection state (RRC Connected), the UE maintains RRC connection with the base station in LTE at this time, and a non-access stratum signaling of the UE is transmitted by the base station (an uplink non-access stratum signaling is transmitted by the base station to a core network, and a downlink non-access stratum signaling is transmitted by the base station to the user equipment).
In LTE and WLAN convergence, a Packet Data Convergence Protocol (PDCP) data Packet of each bearer is generated by a PDCP entity located in a base station, and is transmitted to a user equipment through a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a physical layer of LTE or through a WLAN.
In the prior art, a UE establishes one or more Public Data Network (PDN) connections through an LTE system access network, and when discovering an accessible WLAN access network, the UE may switch some or all of the established PDN connections to the WLAN.
Typically, the UE may select a WLAN that may be accessed according to network selection criteria and switch some or all of the established PDN connections to the WLAN network. In Release 13, a signaling that a base station triggers a UE to switch to a WLAN network is introduced, and the base station may obtain load information of the WLAN through a backhaul link with the WLAN and determine whether to trigger the UE to switch to the WLAN network according to information such as WLAN network signal strength measured by the UE.
However, the UE starts handover after finding a suitable WLAN network, and the UE needs to interact with an Authentication, Authorization, and Accounting (AAA) Server/Home Subscriber Server (HSS) to perform access Authentication of the UE. In the authentication process, the UE and the AAA server (including the HSS) need to interact for multiple times, which takes a long time, so that the PDN connection establishment process initiated by the UE in the WLAN (the PDN connection already established in LTE) takes a long time, which causes a long service interruption time and affects user experience.
Disclosure of Invention
The technical problem solved by the embodiment of the invention is how to reduce the time of access authentication in the process of switching from LTE to WLAN and improve the use experience of users.
In order to solve the above problem, an embodiment of the present invention provides a method for controlling a handover from an LTE network to a WLAN network, where the method includes: when a switching request sent by a base station is received, analyzing identification information of user equipment from the switching request, wherein the switching request is sent when the base station determines that the user equipment is allowed to be switched from an LTE network to a WLAN network; sending the identification information of the user equipment to a Home Subscriber Server (HSS) through an AAA server so that the HSS authenticates the user equipment to generate authentication information of the user equipment, and the AAA server generates corresponding authentication associated information based on the authentication information; when receiving the authentication associated information sent by the AAA server, storing the authentication associated information; and when the access of the user equipment is determined, the authentication associated information is sent to the user equipment, so that the user equipment can access the WLAN network by using the authentication associated information.
Optionally, the method further comprises: and when the authentication associated information is received, sending switching response information to the base station so that the base station triggers the user equipment to switch to the WLAN.
Optionally, the method further comprises: receiving a fast re-authentication identifier sent by the AAA server or the HSS when the user equipment is determined to be trustable; and sending the fast re-authentication identifier to the user equipment through the base station, so that the user equipment accesses the WLAN network by using the fast re-authentication identifier.
Optionally, the sending the fast re-authentication identifier to the user equipment through the base station includes: and adding the fast re-authentication identification into a switching response message and sending the fast re-authentication identification to the base station, so that the base station acquires the fast re-authentication identification from the switching response message and sends the fast re-authentication identification to the user equipment.
Optionally, the handover request message sent by the base station is received through an Xw interface.
Optionally, the handover response message is sent to the base station through an Xw interface.
Optionally, the identification information of the user is IMSI or GUTI.
The embodiment of the invention also provides a method for controlling the switching from the LTE network to the WLAN network, which comprises the following steps: acquiring a measurement report of a detected WLAN (wireless local area network) reported by user equipment, and optionally acquiring load information of the WLAN; determining whether the user equipment allows handover to the WLAN network based on the measurement report and load information of the WLAN network; when determining that the user equipment is allowed to be switched to the WLAN network, sending switching request information to the WLAN network so that the WLAN network performs an access authentication process on the user equipment, generating corresponding authentication associated information, and when determining that the user equipment is accessed, sending the associated authentication information to the user equipment so that the user equipment accesses the WLAN network by using the authentication associated information, wherein the switching request comprises identification information of the user equipment.
Optionally, the method further comprises: and when receiving a switching response sent by the WLAN terminal, sending switching indication information to the user equipment so as to trigger the user equipment to switch to the WLAN.
Optionally, when the ue is determined to be trusted as the AAA server/home subscriber server, the handover response includes information of the fast re-authentication identifier, and further includes: and sending the fast re-authentication identification analyzed from the switching response to the user equipment so that the user equipment sends the fast re-authentication identification to an AAA server/Home Subscriber Server (HSS), and accessing the WLAN network when the fast re-authentication identification matched with the AAA server/HSS exists in the AAA server/Home Subscriber Server (HSS).
Optionally, the handover request message is sent to the WLAN terminal through an Xw interface.
Optionally, a handover response message sent by the WLAN network is received through an Xw interface.
An embodiment of the present invention further provides a WLAN terminal, where the terminal includes: the device comprises a parsing unit, a sending unit and a receiving unit, wherein the parsing unit is suitable for parsing identification information of user equipment from a handover request sent by a base station when the base station determines that the user equipment is allowed to be handed over from an LTE network to a WLAN network; a receiving and sending unit, adapted to send the identification information of the user equipment to a home subscriber server HSS through an AAA server, so that the home subscriber server HSS authenticates the user equipment to generate authentication information of the user equipment, and the AAA server generates corresponding authentication association information based on the authentication information; the storage unit is suitable for storing the authentication associated information when receiving the authentication associated information sent by the AAA server; the transceiving unit is further adapted to send the authentication association information to the user equipment when determining that the user equipment is accessed, so that the user equipment accesses a WLAN network using the authentication association information.
Optionally, the transceiver unit is further adapted to send handover response information to the base station when receiving the authentication association information, so that the base station triggers the user equipment to handover to the WLAN network.
Optionally, the transceiver unit is further adapted to receive a fast re-authentication identifier sent by the AAA server or a home subscriber server HSS when determining that the user equipment is trusted; and sending the fast re-authentication identifier to the user equipment through the base station, so that the user equipment accesses the WLAN network by using the fast re-authentication identifier.
Optionally, the transceiver unit is adapted to add the fast re-authentication identifier to a handover response message and send the handover response message to the base station, so that the base station obtains the fast re-authentication identifier from the handover response message and sends the fast re-authentication identifier to the user equipment.
Optionally, the transceiver unit is adapted to send the handover response message to the base station over an Xw interface.
Optionally, the transceiver unit is adapted to receive the handover request message sent by the base station through an Xw interface.
Optionally, the identification information of the user is IMSI or GUTI.
An embodiment of the present invention further provides a base station, where the base station includes: the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is suitable for acquiring a measurement report of a detected WLAN network reported by user equipment and load information of the WLAN network; a determining unit adapted to determine whether the user equipment allows handover to the WLAN network based on the measurement report and load information of the WLAN network; a handover request unit, adapted to send handover request information to a WLAN network when it is determined that a user equipment is allowed to be handed over to the WLAN network, so that the WLAN network performs access authentication on the user equipment, generates corresponding authentication association information, and sends the association authentication information to the user equipment when it is determined that the user equipment is accessed, so that the user equipment accesses the WLAN network using the authentication association information, where the handover request includes identification information of the user equipment.
Optionally, the base station further includes:
and the switching triggering unit is suitable for sending switching indication information to the user equipment when receiving a switching response sent by the WLAN terminal so as to trigger the user equipment to switch to the WLAN.
Optionally, the handover triggering unit is further adapted to send the fast re-authentication identifier parsed from the handover response to the user equipment when the user equipment is determined to be trusted as the AAA server/home subscriber server and the handover response includes information of the fast re-authentication identifier, so that the user equipment accesses the WLAN network using the fast re-authentication identifier.
Optionally, the handover triggering unit is adapted to receive a handover response message sent by the WLAN network through an Xw interface.
Optionally, the handover request unit is adapted to send the handover request message to the WLAN terminal through an Xw interface.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the scheme, the access authentication of the user equipment is triggered by the base station instead of being performed when the UE is switched to the WLAN, so that the time that the UE consumes the access authentication can be saved, the time that the UE can be switched to the WLAN can be saved, the long-time interruption of the service of the user equipment is avoided, and the use experience of the user can be improved.
Further, when it is determined that the UE does not access the detected WLAN network for the first time, the AAA server/HSS sends the generated fast re-authentication identifier to the base station through the handover response, and the base station sends the fast re-authentication identifier to the user equipment, so that the user equipment can use the fast re-authentication identifier to access the WLAN quickly when accessing the WLAN network.
Drawings
Fig. 1 is a flowchart of a method for controlling handover from an LTE network to a WLAN network according to an embodiment of the present invention;
fig. 2 is a flowchart of another method for controlling handover from an LTE network to a WLAN network according to an embodiment of the present invention;
fig. 3 is a flowchart of a handover control method for an LTE network to a WLAN network according to another embodiment of the present invention;
fig. 4 is a flowchart of a handover control method for an LTE network to a WLAN network according to another embodiment of the present invention;
fig. 5 is a flowchart of a handover control method for an LTE network to a WLAN network according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a WLAN terminal in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a base station in an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 shows a flowchart of a method for controlling handover from an LTE network to a WLAN network in an embodiment of the present invention. As shown in fig. 1, in a specific implementation, a method for controlling handover from an LTE network to a WLAN network may include:
step S101: when a switching request sent by a base station is received, the identification information of the user equipment is analyzed from the base station, and the switching request is sent when the base station determines that the user equipment is allowed to be switched from an LTE network to a WLAN network.
Step S102: and sending the identification information of the user equipment to a Home Subscriber Server (HSS) through an AAA server so that the Home Subscriber Server (HSS) authenticates the user equipment, and the AAA server generates corresponding authentication associated information based on the authentication information.
Step S103: and storing the authentication associated information when receiving the authentication associated information sent by the AAA server.
Step S104: and when the access of the user equipment is determined, the authentication associated information is sent to the user equipment, so that the user equipment can access the WLAN network by using the authentication associated information.
Fig. 2 shows a flowchart of a method for controlling handover from an LTE network to a WLAN network in an embodiment of the present invention. As shown in fig. 2, in a specific implementation, a method for controlling handover from an LTE network to a WLAN network may include:
step S201: and acquiring a measurement report of the detected WLAN reported by the user equipment.
In an embodiment of the present invention, the base station may determine whether the ue allows to switch to the detected WLAN network according to the measurement report of the WLAN network reported by the ue.
In another embodiment of the present invention, the base station may determine whether the ue is allowed to handover to the detected WLAN network according to the measurement report of the WLAN network reported by the ue and the load condition information of the WLAN network acquired through the backhaul link.
Step S202: determining whether the user equipment allows handover to the WLAN network based on information of a measurement report of the WLAN network.
Step S203: when determining that the user equipment is allowed to be switched to the WLAN network, sending switching request information to the WLAN network so that the WLAN network performs access authentication on the user equipment, generating corresponding authentication associated information, and when determining that the user equipment is accessed, sending the associated authentication information to the user equipment so that the user equipment accesses the WLAN network by using the authentication associated information, wherein the switching request comprises identification information of the user equipment.
The method for controlling the handover from the LTE network to the WLAN network in the embodiment of the present invention will be described in further detail with reference to fig. 3 to 5.
Step S301: when it is determined that the user equipment allows handover to the detected WLAN network, the base station transmits handover request information to the WLAN terminal.
In specific implementation, when the UE has accessed a PDN through an LTE system and establishes one or more PDN connections, and when the UE detects an accessible WLAN network, the base station may instruct the UE to measure the WLAN network, and may determine whether the UE allows handover to the WLAN network according to a WLAN network measurement report reported by the UE, or according to a WLAN network measurement report reported by the UE and load information of the WLAN network acquired through a backhaul link.
Step S302: and the WLAN terminal sends the identification information of the user equipment analyzed from the switching request to a Home Subscriber Server (HSS) through the AAA server.
In an implementation, in order to save the time that the UE spends on the access authentication of the WLAN network, when the base station determines that the UE can switch to the WLAN network, the base station may add the identification information of the UE to the handover request information through a communication interface, such as an Xw interface, with the WLAN terminal and send the handover request information to the WLAN terminal. The WLAN terminal can analyze the UE identity from the handover request information and send the UE identity to the AAA server, which then sends the UE identity to the HSS to perform access authentication on the UE. The Xw interface is an interface introduced in Release 13(Release 13) of the third Generation partnership project (3 GPP) to implement convergence and interaction between LTE and WLAN, and is a logical interface between a base station in LTE and a WLAN terminal (WLAN Termination) in a WLAN system, and is used for transferring control signaling and data between the base station and the WLAN terminal.
In a specific implementation, the identification information of the UE sent by the base station to the WLAN terminal may be an International Mobile Subscriber Identity (IMSI) of the UE, which is acquired by the base station from the mobility management entity MME or the UE, or a Globally Unique Temporary UE Identity (GUTI) of the UE, which is acquired by the base station from the mobility management entity MME.
Step S303: and the HSS generates corresponding authentication information based on the identification information of the user equipment and sends the authentication information to the AAA server.
In specific implementation, after receiving the identification information of the UE, the home subscriber server HSS starts to perform access authentication on the UE, generates corresponding authentication information, and sends the authentication information to the AAA server.
Step S304: and the AAA server generates corresponding authentication associated information based on the authentication information and sends the authentication associated information to the WLAN terminal.
In a specific implementation, the AAA server may generate Authentication related information including parameters such as key materials including the MSK and the EMS and a Message Authentication Code (MAC) by using the Authentication information, and send the generated Authentication related information including the key materials and the MAC parameters to the WLAN terminal for storage.
Step S305: and the WLAN terminal receives and stores authentication associated information generated by the AAA server based on the authentication information sent by the HSS.
In specific implementation, the WLAN terminal receives authentication association information including a key material and a MAC parameter sent by the AAA server and sends the authentication association information to the WLAN terminal for storage, so as to assist the UE to complete authentication when it is determined that the UE accesses the WLAN network.
Step S306: and when the access of the user equipment is determined, the WLAN terminal sends the authentication associated information to the user equipment to assist the user equipment in completing the access authentication.
In a specific implementation, when the UE receives the handover indication information sent by the base station, the UE starts to handover to the WLAN network, and when the WLAN network determines that the UE accesses, the authentication association information, such as MAC, may be sent to the UE, and the UE may use the authentication association information to implement access authentication.
Referring to fig. 4, in a specific implementation, when the AAA server/home subscriber server HSS determines that the user equipment is trusted according to the identification information of the user equipment, the method for controlling handover from the LTE network to the WLAN network in the embodiment of the present invention may include:
step S401: when it is determined that the user equipment allows handover to the detected WLAN network, the base station transmits handover request information to the WLAN terminal.
Step S402: and the WLAN terminal sends the identification information of the user equipment analyzed from the switching request to a Home Subscriber Server (HSS) through the AAA server.
Step S403: and the HSS generates corresponding authentication information based on the identification information of the user equipment and sends the authentication information to the AAA server.
Step S404: and the AAA server generates corresponding authentication associated information based on the authentication information and sends the authentication associated information to the WLAN terminal.
Step S405: and the WLAN terminal receives and stores authentication associated information generated by the AAA server based on the authentication information sent by the HSS.
In a specific implementation, please refer to descriptions of step S301 to step S305 in fig. 3 for the execution of step S401 to step S405 in the embodiment of the present invention, which is not described herein again.
Step S406: and when receiving the authentication associated information, the WLAN terminal sends switching response information to the base station.
In an embodiment of the present invention, when the WLAN terminal receives the authentication association information sent by the AAA server, the WLAN terminal may send handover response information to the base station, so that the base station triggers the UE to start handover to the WLAN.
Step S407: and when receiving the switching response sent by the WLAN terminal, the base station triggers the user equipment to switch to the WLAN.
In a specific implementation, when the base station receives the handover response sent by the WLAN terminal, the base station may trigger the UE to start handover to the WLAN network. Because the UE does not start to switch to the WLAN before receiving the switching indication information sent by the base station, and the UE always uses the LTE network to transmit service data in the process of generating the authentication associated information of the UE by the cooperation of the base station, the WLAN, the AAA server and the HSS, the time consumed by the UE to switch to the WLAN can be saved, the long-time interruption of the service performed by the UE can be avoided, and the use experience of a user can be improved.
Step S408: and when the access of the user equipment is determined, the WLAN terminal sends the authentication associated information to the user equipment so as to finish the access authentication of the user equipment.
In a specific implementation, when the UE receives the handover indication information sent by the base station, the UE starts to handover to the WLAN network, and when the WLAN network determines that the UE accesses, the authentication association information may be sent to the UE, and the UE may use the authentication association information to complete access authentication.
Fig. 5 shows a flowchart of another method for controlling handover from an LTE network to a WLAN network in the embodiment of the present invention. Referring to fig. 5, in an embodiment, a method for controlling handover from an LTE network to a WLAN network in the embodiment of the present invention may include:
step S501: when it is determined that the user equipment allows handover to the detected WLAN network, the base station transmits handover request information to the WLAN terminal.
Step S502: and the WLAN terminal sends the identification information of the user equipment analyzed from the switching request to a Home Subscriber Server (HSS) through the AAA server.
In a specific implementation, please refer to the descriptions of step S301 to step S302 in fig. 3 for the execution of step S501 to step S502 in the embodiment of the present invention, which is not described herein again.
Step S503: and the WLAN terminal adds the received fast re-authentication identification generated by the AAA server/the HSS into a switching response message and sends the switching response message to the base station.
In a specific implementation, when a UE in LTE detects an accessible WLAN network, and a WLAN terminal receives a handover request message sent by a base station, and sends identification information of the UE parsed from the handover request message to an AAA server, or sends the identification information to an HSS through the AAA server, and the AAA server/HSS can determine that the UE is trusted based on the identification information of the UE, the AAA server/HSS may generate a Fast re-authentication (Fast re-authentication) identifier for communication between the UE and the WLAN network and send the identifier to the WLAN terminal while generating key materials (keys), and the WLAN terminal adds the Fast re-authentication identifier to a handover response message and sends the identifier to the base station.
Step S504: and the base station sends the fast re-authentication identification analyzed from the switching response to the user equipment and triggers the user equipment to switch to the WLAN.
In specific implementation, when receiving a handover response sent by the WLAN terminal, the base station sends the fast re-authentication identifier to the UE, and triggers the UE to handover to the WLAN network. Because the UE has received the fast re-authentication identifier, when accessing the WLAN network, the UE can use the fast re-authentication identifier to quickly access the WLAN network without performing access authentication operation on the UE when accessing for the first time again, so that the time of the access authentication of the UE can be further saved, and the use experience of the user is improved.
The following describes in further detail a device corresponding to the method for controlling the handover from the LTE network to the WLAN network in the above embodiment.
Fig. 6 shows a schematic structural diagram of a WLAN terminal in an embodiment of the present invention. As shown in fig. 6, in an embodiment, the WLAN terminal 600 in the embodiment of the present invention may include a parsing unit 601, a transceiving unit 602, and a storage unit 603, where:
the parsing unit 601 is adapted to parse identification information of the user equipment from a handover request sent by a base station when the base station determines that the user equipment is allowed to be handed over from the LTE network to the WLAN network. In an implementation of the present invention, the identification information of the user is an IMSI or a GUTI.
The transceiving unit 602 is adapted to send the identification information of the user equipment to a home subscriber server HSS through an AAA server, so that the home subscriber server HSS authenticates the user equipment to generate authentication information of the user equipment. In an implementation of the present invention, the transceiver unit 602 is adapted to receive the handover request message sent by the base station through an Xw interface.
A storage unit 603, adapted to store the authentication information of the user equipment when receiving the authentication information of the user equipment sent by the home subscriber server HSS through the AAA server;
the transceiving unit 602 is further adapted to send the authentication information to the user equipment when determining that the user equipment is accessed, so that the user equipment accesses a WLAN network using the authentication association information. In an implementation of the present invention, the transceiver unit 602 is adapted to send the handover response message to the base station through the Xw interface.
In a specific implementation, the transceiver unit 602 is further adapted to send handover response information to the base station when receiving authentication information of the user equipment, so that the base station triggers handover of the user equipment to the WLAN network.
In a specific implementation, the transceiver 602 is further adapted to receive a fast re-authentication identifier sent by the AAA server or the home subscriber server HSS when determining that the user equipment is trusted; and sending the fast re-authentication identifier to the user equipment through the base station, so that the user equipment enables the user equipment to send the fast re-authentication identifier to an AAA server/Home Subscriber Server (HSS), and when the AAA server/Home Subscriber Server (HSS) has a fast re-authentication identifier matched with the AAA server/Home Subscriber Server (HSS), accessing the WLAN.
In an implementation of the present invention, the transceiver unit 602 is adapted to add the fast re-authentication identifier to a handover response message and send the handover response message to the base station, so that the base station obtains the fast re-authentication identifier from the handover response message and sends the fast re-authentication identifier to the ue.
Fig. 7 shows a schematic structural diagram of a base station in the embodiment of the present invention. The base station 700 shown in fig. 7 may include an obtaining unit 701, a determining unit 702, and a handover requesting unit 703 that are connected in sequence, where:
an obtaining unit 701, adapted to obtain a measurement report of a detected WLAN network and load information of the WLAN network, which are reported by a user equipment;
a determining unit 702 adapted to determine whether the user equipment allows handover to the WLAN network based on the measurement report and load information of the WLAN network;
a handover request unit 703, adapted to send handover request information to a WLAN network when it is determined that a user equipment is allowed to be handed over to the WLAN network, so that the WLAN network performs access authentication on the user equipment, generates corresponding authentication association information, and sends the association authentication information to the user equipment when it is determined that the user equipment is accessed, so that the user equipment accesses the WLAN network by using the authentication association information, where the handover request includes identification information of the user equipment. In an implementation of the present invention, the handover request unit 703 is adapted to send the handover request message to the WLAN terminal through an Xw interface.
In a specific implementation, the base station 700 shown in fig. 7 may further include a handover triggering unit 704, where:
a handover triggering unit 704, adapted to send handover indication information to the user equipment to trigger the user equipment to handover to the WLAN network when receiving a handover response sent by the WLAN terminal.
In a specific implementation, the handover triggering unit 704 is further adapted to, when the ue is determined to be a trusted AAA server/home subscriber server and the handover response includes information of a fast re-authentication identifier, send the fast re-authentication identifier parsed from the handover response to the ue, so that the ue sends the fast re-authentication identifier to an AAA server/home subscriber server HSS, and accesses the WLAN network when there is a fast re-authentication identifier matching with the AAA/HSS.
In a specific implementation, the handover triggering unit 704 is adapted to receive a handover response message sent by the WLAN network through the Xw interface.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by instructions associated with hardware via a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
The method and system of the embodiments of the present invention have been described in detail, but the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (24)

1. A method for controlling switching from an LTE network to a WLAN network is characterized by comprising the following steps:
when a WLAN terminal receives switching request information sent by a base station, analyzing identification information of user equipment from the switching request information, wherein the switching request information is sent when the base station determines that the user equipment is allowed to be switched from an LTE network to the WLAN network;
the WLAN terminal sends the identification information of the user equipment to a home subscriber server through an authentication, authorization and accounting AAA server so that the home subscriber server HSS authenticates the user equipment to generate authentication information of the user equipment, and the AAA server generates corresponding authentication associated information based on the authentication information;
when the WLAN terminal receives the authentication associated information sent by the AAA server, storing the authentication associated information;
and when the WLAN terminal determines that the user equipment is accessed, the authentication associated information is sent to the user equipment, so that the user equipment can access a WLAN network by using the authentication associated information.
2. The method of claim 1, further comprising: and when the authentication associated information is received, sending switching response information to the base station so that the base station triggers the user equipment to switch to the WLAN.
3. The method of claim 1, wherein after the WLAN terminal parses the identification information of the ue from the handover request information, the method further comprises:
sending the identification information of the user equipment to the AAA server, or sending the identification information of the user equipment to a Home Subscriber Server (HSS) through the AAA server;
receiving a fast re-authentication identifier sent by the AAA server or the HSS when the user equipment is determined to be trustable;
and sending the fast re-authentication identifier to the user equipment through the base station, so that the user equipment accesses the WLAN network by using the fast re-authentication identifier.
4. The method for controlling handover of an LTE network to a WLAN network according to claim 3, wherein the sending the fast re-authentication identifier to the user equipment through the base station comprises:
and adding the fast re-authentication identification into the switching response information and sending the fast re-authentication identification to the base station, so that the base station acquires the fast re-authentication identification from the switching response information and sends the fast re-authentication identification to the user equipment.
5. The method of claim 1, wherein the handover request information sent by the base station is received through an Xw interface.
6. The method of claim 4, wherein the handover response message is sent to the base station via an Xw interface.
7. The method of claim 1, wherein the identification information of the UE is an International Mobile Subscriber Identity (IMSI) or a globally unique temporary UE identity (GUTI).
8. A method for controlling switching from an LTE network to a WLAN network is characterized by comprising the following steps:
a base station acquires a measurement report of a detected WLAN (wireless local area network) reported by user equipment;
the base station judges whether the user equipment allows switching to the WLAN network or not based on the measurement report of the WLAN network;
when the base station determines that the user equipment is allowed to be switched to a WLAN, sending switching request information to a WLAN terminal, wherein the switching request information comprises identification information of the user equipment; the WLAN terminal analyzes the identification information of the user equipment from the switching request information and sends the identification information to a Home Subscriber Server (HSS) through a verification, authorization and accounting AAA server, the WLAN terminal receives and stores authentication associated information sent by the AAA server and sends the authentication associated information to the user equipment when the access of the user equipment is determined, so that the user equipment can access a WLAN network by using the authentication associated information; the authentication associated information is generated by the following steps: the home subscriber server HSS generates corresponding authentication information based on the identification information of the user equipment and sends the authentication information to the AAA server, and the AAA server generates corresponding authentication associated information based on the authentication information and sends the authentication associated information to the WLAN terminal.
9. The method of claim 8, further comprising, after sending the handover request information to the WLAN terminal:
when receiving switching response information sent by the WLAN terminal, sending switching indication information to the user equipment so as to trigger the user equipment to switch to the WLAN; the switching response information is generated after the WLAN terminal receives the authentication associated information sent by the AAA server.
10. The method of claim 9, wherein when the ue is determined to be trusted as the AAA server/home subscriber server, the handover response information includes fast re-authentication identification information, and after receiving the handover response information sent by the WLAN terminal, the method further includes:
sending the fast re-authentication identifier analyzed from the handover response information to the user equipment, so that the user equipment accesses the WLAN network by using the fast re-authentication identifier; the AAA server/home subscriber server determines whether the user equipment is trustable or not according to the identification information of the user equipment; the identification information of the user equipment is analyzed from the switching request information by the WLAN terminal, and is sent to the AAA server by the WLAN terminal, or is sent to the HSS by the AAA server by the WLAN terminal.
11. The method of claim 9, wherein the handover response message sent by the WLAN network is received through an Xw interface.
12. The method of claim 8, wherein the handover request message is sent to the WLAN terminal via an Xw interface.
13. A WLAN terminal, comprising:
the device comprises an analyzing unit, a judging unit and a judging unit, wherein the analyzing unit is suitable for analyzing identification information of user equipment from received switching request information sent by a base station, and the switching request information is sent by the base station when the base station determines that the user equipment is allowed to be switched from an LTE network to a WLAN network;
the receiving and sending unit is suitable for sending the identification information of the user equipment to a Home Subscriber Server (HSS) through an authentication, authorization and accounting (AAA) server so that the Home Subscriber Server (HSS) authenticates the user equipment to generate authentication information of the user equipment, and the AAA server generates corresponding authentication associated information based on the authentication information;
the storage unit is suitable for storing the authentication associated information when receiving the authentication associated information sent by the AAA server;
the transceiving unit is further adapted to send the authentication association information to the user equipment when determining that the user equipment is accessed, so that the user equipment accesses a WLAN network using the authentication association information.
14. The WLAN terminal of claim 13, wherein the transceiver unit is further adapted to send a handover response message to the base station when receiving the authentication association message, so that the base station triggers the handover of the user equipment to the WLAN network.
15. The WLAN terminal of claim 13, wherein the transceiving unit is further adapted to send the identification information of the ue to the AAA server or send the identification information of the ue to a home subscriber server HSS through the AAA server after the parsing unit parses the identification information of the ue from the handover request information; receiving a fast re-authentication identifier sent by the AAA server or the HSS when the user equipment is determined to be trustable; and sending the fast re-authentication identifier to the user equipment through the base station, so that the user equipment accesses the WLAN network by using the fast re-authentication identifier.
16. The WLAN terminal according to claim 15, wherein the transceiver unit is adapted to add the fast re-authentication identifier to a handover response message and send the handover response message to the base station, so that the base station obtains the fast re-authentication identifier from the handover response message and sends the fast re-authentication identifier to the ue.
17. The WLAN terminal according to claim 16, characterized in that the transceiving unit is adapted to send the handover response information to the base station over an Xw interface.
18. The WLAN terminal according to claim 13, wherein the transceiving unit is adapted to receive the handover request information transmitted by the base station through an Xw interface.
19. The WLAN terminal of claim 13, wherein the identification information of the UE is an International Mobile Subscriber Identity (IMSI) or a globally unique temporary UE identity (GUTI).
20. A base station, comprising:
the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is suitable for acquiring information of a measurement report of the detected WLAN network reported by user equipment;
a determining unit adapted to determine whether the user equipment allows handover to the WLAN network based on information of a measurement report of the WLAN network;
a handover request unit adapted to send handover request information to a WLAN terminal when it is determined that a user equipment is allowed to handover to a WLAN network, the handover request information including identification information of the user equipment; the WLAN terminal analyzes the identification information of the user equipment from the switching request information and sends the identification information to a Home Subscriber Server (HSS) through a verification, authorization and accounting AAA server, the WLAN terminal receives and stores authentication associated information sent by the AAA server and sends the authentication associated information to the user equipment when the access of the user equipment is determined, so that the user equipment can access a WLAN network by using the authentication associated information; the authentication associated information is generated by the following steps: the home subscriber server HSS generates corresponding authentication information based on the identification information of the user equipment and sends the authentication information to the AAA server, and the AAA server generates corresponding authentication associated information based on the authentication information and sends the authentication associated information to the WLAN terminal.
21. The base station of claim 20, further comprising:
a handover triggering unit adapted to send handover indication information to the user equipment to trigger the user equipment to handover to the WLAN network when receiving handover response information sent by the WLAN terminal after the handover request unit sends handover request information to the WLAN terminal;
the switching response information is generated after the WLAN terminal receives the authentication associated information sent by the AAA server.
22. The base station of claim 21, wherein the handover triggering unit is further adapted to, when the ue is determined to be a trusted AAA server/home subscriber server and the handover response information includes information of a fast re-authentication identifier, send, after receiving the handover response information sent by the WLAN terminal, the fast re-authentication identifier parsed from the handover response information to the ue, so that the ue accesses the WLAN network using the fast re-authentication identifier; the AAA server/home subscriber server determines whether the user equipment is trustable or not according to the identification information of the user equipment; the identification information of the user equipment is analyzed from the switching request information by the WLAN terminal, and is sent to the AAA server by the WLAN terminal, or is sent to the HSS by the AAA server by the WLAN terminal.
23. The base station according to claim 22, wherein the handover triggering unit is adapted to receive handover response information sent by the WLAN network through an Xw interface.
24. The base station according to claim 20, wherein the handover request unit is adapted to send the handover request information to the WLAN terminal via an Xw interface.
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