WO2014183276A1

WO2014183276A1 - Offloading method and device of wireless network

Info

Publication number: WO2014183276A1
Application number: PCT/CN2013/075638
Authority: WO
Inventors: 戴明增; 张宏平; 曾清海
Original assignee: 华为技术有限公司
Priority date: 2013-05-15
Filing date: 2013-05-15
Publication date: 2014-11-20
Also published as: CN104756541B; CN104756541A

Abstract

Disclosed are an offloading method and device of a wireless network. The offloading method of a wireless network comprises: a user equipment receiving indication information sent by a base station, the indication information being used for indicating that the user equipment is in a connected state in a wireless cellular network; the user equipment sending the indication information to a wireless access point, so that the wireless access point indicates that a core network device keeps a default bearer of the wireless cellular network, and the default bearer being used by the user equipment to keep a connected state in the wireless cellular network; and the user equipment being offloaded to a wireless local area network. By using the mode, the proper offloading of a service of the user equipment between an RAN and a WLAN can be ensured, thereby improving the user experience.

Description

The present invention relates to the field of wireless communication technologies, and in particular, to a method and a device for offloading a wireless network. BACKGROUND OF THE INVENTION With the development of the mobile Internet, the requirements for the quality of service and network speed that a cellular communication system can provide are becoming higher and higher.

LTE (Long Term Evolution Long Term Evolution) is a wireless communication technology led by the 3GPP (3rd Generation Partnership Program). As an advanced communication technology than UMTS, LTE can reduce service delay, increase system capacity, increase user data rate, and save network construction costs. In LTE, the base station is responsible for establishing an air interface link with the user equipment, and the user equipment communicates with the core network through the base station, and uses the services provided by the network.

The Wireless Local Access Network (WLAN) is a wireless form of a LAN. It allows users to get rid of the constraints of the network cable and easily access and use the network in various scenarios. Among them, as a form of WLAN, WiFi (Wireless Fidelity) can provide the above communication services.

Although LTE and subsequent LTE-A wireless communication technologies can provide considerable air interface transmission rates, in the era of mobile Internet, in the face of explosive growth in data traffic, the abundance of air interface resources has been greatly tested. In order to cope with network congestion caused by rapid data growth, operators must increase the number of network base stations to increase throughput, which in turn increases operators' equipment investment and maintenance costs. As a wireless access technology, WLAN has the advantages of high link data rate and low equipment investment cost, and provides a possible solution to solve the above contradictions of operators.

With the rapid growth of mobile broadband data, more and more operators deploy to connect user equipment to the WLAN to offload service data. In order to implement WLAN offloading of wireless networks, the current 3GPP standard regulates interoperability between 3GPP networks and WLANs, one of which is IP Flow Mobility (IFOM). In the IFOM technology, because the user equipment controls the traffic off policy itself, because it cannot sense the load of the 3GPP radio access network (RAN) and the WLAN and the quality of the air interface channel, the service of the user equipment cannot be guaranteed. Reasonable shunting between RAN and WLAN. SUMMARY OF THE INVENTION The technical problem to be solved by the present application is to provide a method and a device for offloading a wireless network. When the user equipment requests service offloading, the user equipment cannot be properly allocated between the wireless cellular network and the WLAN.

In view of the above, the present application provides a method and a device for distributing a wireless network, which can ensure that when a user equipment is offloaded to a WLAN, the user is still in a connected state in the wireless cellular network, thereby ensuring that the user's service is normal between the wireless cellular network and the WLAN. Diversion.

The first aspect of the present application provides a method for offloading a wireless network, including the following steps: The user equipment receives the indication information sent by the base station, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network; The user equipment sends the indication information to the wireless access point, where the wireless access point instructs the core network device to reserve the default bearer of the wireless cellular network, where the default bearer is used by the user equipment in the wireless The network is in a connected state; the user equipment is offloaded to the wireless local area network.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the receiving, by the user equipment, the indication information that is sent by the base station, The offloading command is used to instruct the user equipment to offload the radio bearer of the user equipment to the radio access point; where the offloading command includes the indication information.

With the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the method further includes: the user equipment sends a offloading request to the base station, where The offloading request is used to request to offload the radio bearer of the user equipment to the wireless access point; wherein the radio bearer excludes the default bearer.

In combination with the first aspect or the first possible implementation of the first aspect, in a third aspect In a possible implementation, the method further includes: the user equipment sends a offloading request to the base station, where the offloading request is used to request to offload the radio bearer of the user equipment to the wireless access point; The offloading request includes the default bearer, and is used by the base station to determine whether to maintain the connection state of the user equipment in the wireless cellular network.

With reference to the first aspect or any one of the foregoing possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the method further includes: the user equipment is offloading to the wireless local area network During the process, the default bearer is retained.

The second aspect provides a method for offloading a wireless network, including the following steps: the base station determines to offload the user equipment from the wireless cellular network to the wireless local area network; the base station sends the indication information to the user equipment, where the indication information is used to indicate The user equipment is in a connected state in the wireless cellular network to maintain a connection with the wireless cellular network when the user equipment is offloaded to the wireless local area network.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes: the base station receiving a default bearer of the wireless cellular network sent by a core network device, where the default bearer is used by the user equipment In a connected state in the wireless cellular network, the core network device is located in the wireless cellular network.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the method further includes: receiving, by the base station, a offloading request sent by the user equipment, The offload request is used to request that a radio bearer of the user equipment is offloaded from the wireless cellular network to the wireless local area network.

With reference to the second aspect, or any one of the foregoing possible implementation manners of the second aspect, in a third possible implementation manner of the second aspect, the sending, by the base station, the indication information to the user equipment, specifically: The user equipment sends a splitting command, where the offloading command is used to instruct the user equipment to offload the radio bearer for the user equipment to the wireless local area network; wherein the offloading command includes the indication information.

In conjunction with the second or third possible implementation of the second aspect, in a fourth possible implementation of the second aspect, the radio bearer excludes the default bearer.

Combining the second aspect or any one of the above possible implementation manners of the second aspect, in the second party And the fifth possible implementation manner of the method, the method further includes: sending, by the base station, the indication information to the core network device, to indicate that the core network device reserves a default bearer of the wireless cellular network.

The third aspect provides a method for offloading a wireless network, including the following steps: The wireless access point receives the indication information sent by the user equipment, where the indication information is used to indicate when the user equipment is offloaded from the wireless cellular network to the wireless local area network. The user equipment is in a connected state in the wireless cellular network; the wireless access point sends the indication information to a core network device, where the core network device reserves a default bearer of the wireless cellular network, where The default bearer is used for the user equipment to be in a connected state in the wireless cellular network.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the indication information further indicates that the radio bearer of the user equipment is offloaded to the wireless local area network.

In conjunction with the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the radio bearer excludes the default bearer.

The fourth aspect provides a method for distributing a wireless network, including the following steps: The core network device receives indication information, where the indication information is used to indicate that when the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in the The wireless cellular network is in a connected state; the core network device retains a default bearer of the wireless cellular network, and the default bearer is used by the user equipment in a connected state in the wireless cellular network.

With reference to the fourth aspect, in a first possible implementation of the fourth aspect, the method further includes: the core network device sending the default bearer to a base station, where the radio bearer of the user equipment is offloaded to a radio access And maintaining the user equipment in a connected state in the wireless cellular network, the base station being located in the wireless cellular network.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the core network device retains a default bearer of the wireless cellular network, and specifically includes: The core network device updates the quality of service QOS of the default bearer.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the sending, by the core network device, the default bearer to the base station, specifically: Sending a radio bearer update command to the base station, where the base station is updated The quality of service QOS of the default bearer, the radio bearer update command includes an updated default bearer. With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the receiving, by the core network device, a radio bearer release request sent by the base station, where the radio bearer release request includes the indication information.

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the receiving, by the core network device, a create session request sent by the wireless access point, where the create session request includes the indication information.

With reference to the fourth aspect, or any one of the foregoing possible implementation manners of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the radio bearer excludes the default bearer.

According to a fifth aspect, a user equipment is provided, including: a receiving unit, configured to receive indication information sent by a base station, where the indication information is used to indicate that the user equipment is in a connected state in a wireless cellular network; The wireless access point sends the indication information, so that the wireless access point instructs the core network device to reserve the default bearer of the wireless cellular network, where the default bearer is used by the user equipment in the wireless cellular network. a connection unit, configured to offload the user equipment to the wireless local area network.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the receiving unit is configured to: receive a traffic off command sent by the base station, where the traffic off command is used to indicate that the user equipment The radio bearer of the user equipment is offloaded to the wireless access point; wherein the offloading command includes the indication information.

With the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner of the fifth aspect, the sending unit is further configured to: send a offloading request to the base station, where The offloading request is used to request to offload the radio bearer of the user equipment to the wireless access point; wherein the radio bearer excludes the default bearer.

With the fifth aspect or the first possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the sending unit is further configured to: send a offloading request to the base station, where The offload request is used to request to offload the radio bearer of the user equipment to the wireless connection The inflow point includes the default bearer, and is used by the base station to determine whether to maintain the connection state of the user equipment in the wireless cellular network.

With reference to the fifth aspect or any one of the foregoing possible implementation manners of the fifth aspect, the fourth possible implementation manner of the fifth aspect, further includes: a retaining unit, configured to be used in the offloading process to the WLAN , retain the default bearer.

According to a sixth aspect, a base station is provided, including: a determining unit, configured to determine to offload a user equipment from a wireless cellular network to a wireless local area network; and a sending unit, configured to send indication information to the user equipment, where the indication information is used to indicate The user equipment is in a connected state in the wireless cellular network to maintain a connection with the wireless cellular network when the user equipment is offloaded to the wireless local area network.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the method further includes: a receiving unit, configured to receive a default bearer of the wireless cellular network that is sent by the core network device, where the default bearer is used by the The user equipment is in a connected state in the wireless cellular network, and the core network device is located in the wireless cellular network.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the receiving unit is further configured to: receive a split request sent by the user equipment, The offload request is used to request that a radio bearer of the user equipment is offloaded from the wireless cellular network to the wireless local area network.

With the sixth aspect or any one of the foregoing possible implementation manners of the sixth aspect, in a third possible implementation manner of the sixth aspect, the sending unit is specifically configured to: send a traffic off command to the user equipment, The offloading command is used to instruct the user equipment to offload the radio bearer for the user equipment to the wireless local area network; wherein the offloading command includes the indication information.

In conjunction with the second or third possible implementation of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the radio bearer excludes the default bearer.

With the sixth aspect, or any one of the foregoing possible implementation manners of the sixth aspect, in the fifth possible implementation manner of the sixth aspect, the sending unit is further configured to: send the Instructing information, used to indicate that the core network device reserves the wireless cellular network Default bearer.

According to a seventh aspect, a wireless access point is provided, including: a receiving unit, configured to receive indication information sent by a user equipment, where the indication information is used to indicate when the user equipment is offloaded from a wireless cellular network to a wireless local area network, where The user equipment is in a connected state in the wireless cellular network; the sending unit is configured to send the indication information to the core network device, so that the core network device reserves a default bearer of the wireless cellular network, where the default bearer The user equipment is in a connected state in the wireless cellular network.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the indication information further indicates that the radio bearer of the user equipment is offloaded to the wireless local area network.

In conjunction with the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the radio bearer excludes the default bearer.

The eighth aspect provides a core network device, including: a receiving unit, configured to receive indication information, where the indication information is used to indicate that when the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in the wireless The processing unit is configured to reserve a default bearer of the wireless cellular network, where the default bearer is used in the connected state of the user equipment in the wireless cellular network.

With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the method further includes: a sending unit, configured to send the default bearer to the base station, to offload the radio bearer of the user equipment to the wireless access point, And maintaining the user equipment in a connected state in the wireless cellular network, where the base station is located in the wireless cellular network.

With reference to the eighth aspect, or the first possible implementation manner of the eighth aspect, in a second possible implementation manner of the eighth aspect, the processing unit is specifically configured to: update a quality of service QOS of the default bearer.

With the second possible implementation of the eighth aspect, in a third possible implementation manner of the eighth aspect, the sending unit is specifically configured to: send a radio bearer update command to the base station, where The base station updates the quality of service QOS of the default bearer, and the radio bearer update command includes an updated default bearer.

With reference to the eighth aspect or any one of the foregoing possible implementation manners of the eighth aspect, In a fourth possible implementation manner, the radio bearer excludes the default bearer.

In the foregoing technical solution, the base station sends the indication information to the user equipment, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network; and the user equipment sends the indication information to the core network device via the wireless access point to enable the core The network device retains the default bearer of the wireless cellular network, thereby ensuring the connection state of the user equipment in the wireless cellular network, and further ensuring reasonable separation of the user equipment between the wireless cellular network and the wireless local area network. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of an embodiment of a network system to which a method for offloading a wireless network of the present application is applied;

2 is a flowchart of an embodiment of a method for distributing a wireless network according to the present application;

2a is a schematic diagram of an embodiment of a network system to which the offloading method of the wireless network of the present application is applied;

3 is a flowchart of another embodiment of a method for distributing a wireless network according to the present application; FIG. 4 is a flowchart of another embodiment of a method for distributing a wireless network according to the present application; FIG. FIG. 6 is a flowchart of another embodiment of a method for distributing a wireless network according to the present application; FIG. 7 is a schematic structural diagram of an embodiment of a user equipment of the present application;

8 is a schematic structural diagram of an embodiment of a base station according to the present application;

9 is a schematic structural diagram of an embodiment of a wireless access point according to the present application;

10 is a schematic structural diagram of an embodiment of a core network device according to the present application;

11 is a schematic structural diagram of another embodiment of a user equipment of the present application;

12 is a schematic structural diagram of another embodiment of a user equipment according to the present application;

13 is a schematic structural diagram of another embodiment of a base station according to the present application;

14 is a schematic structural diagram of another embodiment of a wireless access point according to the present application;

15 is a schematic structural diagram of another embodiment of a core network device of the present application. detailed description The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), etc.

It should be understood that, in the embodiment of the present invention, the user equipment (UE, User Equipment) includes but is not limited to a mobile station (MS, Mobile Station), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a mobile phone (handset). And portable equipment, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular") Telephone), a computer with wireless communication function, etc., and the user equipment can also be a portable, portable, handheld, computer built-in or vehicle-mounted mobile device.

In an embodiment of the invention, a base station (e.g., an access point) may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), The invention is not limited.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of an embodiment of a network system applied to a method for offloading a wireless network according to the present application. The network system includes a user equipment 100, an access device 200, and a core network device 300. The core network device 300 is a network service provider. The bridge connected to the access network, or the access network and other access networks, is used to control the data request and processing of the core network, and connect the network to different networks. The core network is the network part other than the access network and the customer premises network. The core network device 300 may include a packet data network gateway (PDN GW), a mobility management entity (MME), a policy and charging function unit, or a switch, and the like.

The access device 200 is used for remote access to network resources. In the embodiment of the present application, the access device 200 may be a wireless communication base station, a network controller, or an access point of a wireless local area network. The access device 200 communicates with the core network device 300, and accesses one or more wireless or wired networks through signal conversion or policy control. An access device 200 incorporates a variety of radio remote control devices, including voice and data linked to a carrier or service provider docking station via a single shared access. The access device 200 can deploy the wireless network into multiple WLANs to offload service data according to the data offloading request of the user equipment 100 by using the radio frequency technology. Data transmission can be accomplished between the user equipment 100 through the 3GPP cellular network and/or between different WLANs. WIFI usually consists of an access point (AP) and a station (station). The above AP is responsible for providing network access to the STA, and is also a connection point between the WLAN and the legacy network.

The user equipment 100 may be a terminal device including a mobile phone, a palmtop computer, a notebook computer, a PC, and the like. When the user equipment 100 wants to divert traffic, the user equipment 100 requests the access device 200 to offload the wireless network to implement data transmission and data access through the wireless network. .

The present invention provides a method, a device, and a system for offloading a wireless network, in order to solve the technical problem that the user equipment cannot be normally offloaded between the wireless cellular network and the WLAN in the prior art. The above shunting method may include: The user equipment receives the indication information sent by the base station, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network;

The user equipment sends the indication information to the wireless access point, where the wireless access point instructs the core network device to keep the user equipment in a connected state in the wireless cellular network;

The user equipment is offloaded to the wireless local area network.

In different embodiments of the present application, the wireless access point is located in a wireless local area network, and the base station and the core network device are located in a wireless cellular network.

The foregoing solution can be used to indicate that the user equipment maintains the connection state on the RAN end by using the access device on the RAN side, and ensures normal and reasonable traffic distribution between the WLAN and the RAN, thereby improving the user's body.

Hereinafter, the above-described shunting method will be specifically described in conjunction with various embodiments. Referring to FIG. 2, FIG. 2 is a flowchart of an embodiment of a method for distributing a wireless network according to the present application. The method for distributing a wireless network in this embodiment is described by using a user equipment. The shunting method for implementing the wireless network includes:

S201: The user equipment receives the indication information sent by the base station, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network.

In this embodiment, the base station may decide to offload the user equipment from the wireless cellular network to the WLAN according to the request of the user equipment, the load status of the base station, or the offload policy, and decide whether to keep the user equipment connected in the wireless cellular network. state. If the base station decides to keep the user equipment in the connected state in the wireless cellular network, the base station may send the indication information to the user equipment, indicating that the user equipment remains in the connected state in the wireless cellular network or indicates that the user equipment maintains two-way relationship with the wireless cellular network and the WLAN. connection. The two-way connection can be understood as the user equipment being in a connected state in the wireless cellular network. At the same time, the user equipment and the WLAN can also communicate normally.

In this case, in order to select a suitable WLAN, the base station may report the scanned WLAN quality, load, etc., or the 3GPP network measurement information by the user equipment, and determine which WLAN coverage the user equipment is under, and which WLAN air interface. Quality and load are more suitable for this Business diversion in the past. On the other hand, the base station may also select an appropriate WLAN by interacting with the WLAN to obtain information about which WLAN(s) the user equipment covers, and the air interface quality and load of the WLANs. If the WLAN is connected to the core network through the 3GPP RAN, the base station also considers the load of the 3GPP RAN, especially the load between the 3GPP RAN and the core network backhaul, to select a suitable WLAN.

In a wireless cellular network, when the user equipment is in the power-on state but does not establish a radio resource control (RRC) connection, it is called the user equipment is in an idle state. For example, the idle state of the user equipment may be an idle state of an evolved packet system (EPS), and an ECM-IDLE. The main features are as follows:

There is no signaling connection between the user equipment and the wireless cellular network, and no radio resources are allocated for the user equipment in the evolved universal terrestrial radio access network (E-UTRAN) and the UE context is not established;

There is no S1-MME and S1-U connection between the user equipment and the wireless cellular network, and the S1-MME is an interface between the base station and the MME, and the S1-U is an interface between the base station and the serving gateway (serving gateway) ;

When the user equipment in the idle state arrives with downlink data, the data shall be terminated at the serving GW, and the MME initiates paging.

In this embodiment, when an RRC connection is established between the user equipment and the wireless cellular network, the user equipment is referred to as a connected state. For example, the connection state of the user equipment may be an ECM connection state (ECM-CONNECTED), and its main features are as follows:

There is a signaling connection between the user equipment and the wireless cellular network, and the signaling connection includes two parts: an RRC connection and an S1-MME connection;

The accuracy of the wireless cellular network to the location of the user equipment is the cell level;

The S1 release procedure will cause the UE to migrate from the ECM-CONNECTED state to the ECM-IDLE state, which may be responsible for managing the release of the UE context in the base station. In summary, when the user equipment is offloaded from the wireless cellular network to the WLAN, maintaining the user equipment in the connected state in the wireless cellular network has the following advantages:

Accelerating the movement of user equipment between the wireless cellular network and the WLAN can also reduce the delay caused by the movement of the user equipment between the two systems;

Some real-time and highly reliable services can be placed on the wireless cellular network to ensure the necessary quality of service (QoS). For example, a guaranteed bit rate (GBR) service similar to the voice of internet protocol (VoIP) can be placed on the wireless cellular network;

For the wireless cellular network, the voice of the IP multimedia subsystem (VoIMS) is not supported. If the voice is to be initiated, a circuit switching fallback (CS fallback) process is required to speed up the process. The fallback process requires the user equipment to remain connected in the wireless cellular network.

In this embodiment, the method further includes: the user equipment receives the offloading command sent by the base station, where the offloading command is used to instruct the user equipment to offload the radio bearer of the user equipment to the wireless access point, where the offloading command includes the foregoing indication information. The above radio bearers may include a dedicated bearer and a default bearer, which may be understood as a system architecture evolution (SAE) used for certain specific services. For example, the dedicated payload can be carried as a GBR or Non-GBR SAE. The so-called GBR SAE bearer is a dedicated network resource related to the guaranteed GBR bearer. In the process of bearer establishment or modification, the bearer is permanently allocated to a bearer through functions such as admission control of the base station. The bearer needs to be guaranteed at the bit rate. . Otherwise, there is no guarantee that the rate of one bearer will be the same, and it is a Non-GBR bearer. Specifically, the offloading of the radio bearer of the user equipment to the wireless access point may also be understood as offloading part or all of the service of the user equipment to the wireless access point.

S202: The user equipment sends the indication information to the wireless access point, where the wireless access point instructs the core network device to reserve the default bearer of the wireless cellular network, where the default bearer is used in the connected state of the user equipment in the wireless cellular network. In this embodiment, the wireless access point may transparently transmit the indication information to the core network device, instructing the core network device to maintain the user equipment in the connected state in the wireless cellular network. For example, after receiving the indication information, the wireless access point may include the indication information in a session establishment request (Create Session Request) message and carry it to the PDN GW. As an implementation to maintain the connection state of the user equipment in the wireless cellular network, the PDN GW may reserve the default bearer of the user equipment in the wireless cellular network.

It is noted herein that the default bearer may be a user bearer that satisfies the default QoS data and signaling. For example, the default bearer can be understood as a bearer that provides a best-effort internet protocol (IP) connection, providing the user equipment with an always-on IP connection. Also, the default bearer should be a Non-GRB SAE bearer. The user equipment needs to establish at least one default bearer with each packet data network (Packet Data Network, PDN) belonging to the wireless cellular network to ensure an always-on IP connection of the user equipment. If the default bearer of the PDN connection of the user equipment is deleted, all the dedicated bearers of the user equipment in the PDN must be deleted, that is, the PDN connection needs to be released. If the unique default bearer of the user equipment is deleted, the user equipment needs to be detached. Therefore, in the interoperation of the wireless cellular network and the WLAN, maintaining the connected state of the user equipment in the wireless cellular network requires the wireless cellular network to at least guarantee a default bearer of the user equipment.

In this embodiment, the method further includes: the user equipment sends a offloading request to the base station, where the offloading request is used to request to offload the radio bearer for the user equipment to the wireless access point. The radio bearer may not include the default bearer, so that the default bearer is deleted in the wireless cellular network, thereby causing the PDN connection to be released or the user equipment to be detached.

It is noted that if the user equipment wants to offload the service to the WLAN, the user equipment may carry the service information to send a wireless network offload request to the wireless access point. The wireless network offloading request is sent in the form of a message, and the request message may include service information for requesting offloading, such as a five-way transmission control protocol/User Datagram Protocol (TCP/UDP) IP header. Group, Traffic Flow Template (TFT), application identification, etc. A quintuple refers to the source IP address, source port, destination IP address, and destination. The port, and the transport layer protocol number are a collection of these five quantities. For example: 192.168.1.1, 0000, TCP, 21.14.88.76, 80 constitute a five-tuple.

Taking the LTE system as an example, the foregoing user equipment receives the indication information sent by the base station, and the method includes: the base station broadcasts the indication information to the user equipment by using the system message, where the user equipment is used to indicate that the user equipment is in a connected state in the LTE, or the user equipment and the LTE Stay connected to the WLAN.

In an optional implementation, the user equipment requests the base station to offload the dedicated bearer except the default bearer to the WLAN according to the indication information of the system message broadcast. For example, the user equipment receives the system message, and when the user equipment decides to initiate a offloading request to the base station, it notifies the indication information of the system message, and if the indication is to maintain the connected state of the user equipment, the non-access stratum of the user equipment ( The non-access stratum, the NAS layer, obtains the bearer identifier corresponding to the default bearer, and carries the other dedicated bearer when initiating the offload request to the base station, but does not carry the default bearer, that is, does not offload the default bearer to the WLAN, The base station maintains the connected state of the user equipment in LTE.

In another optional implementation manner, the base station sends the indication information to the user equipment and the core network device respectively when determining that the user equipment remains in the connected state in the LTE.

In an optional implementation manner, the base station may send the indication of maintaining the connection state of the user equipment to the user equipment by using an RRC reconfiguration command, where the RRC layer of the user equipment receives the NAS layer that is delivered to the user equipment. Subsequently, the user equipment does not initiate a deactivation process of the default bearer, that is, the user equipment retains the default bearer. Specifically, the user equipment retains the default bearer, and may not carry the default bearer when the user equipment initiates the offload request to the base station, thereby ensuring that the user equipment is in the wireless cellular network when part or all of the service is offloaded to the WLAN. Still in the connected state. Or, the user equipment sends the default bearer indication to the base station when the base station initiates the offloading request, so that the base station can determine whether to maintain the user equipment in the wireless cellular network according to the request of the user equipment and/or the network status. The connection state, if the base station decides to maintain the connection state of the user equipment in the wireless cellular network, does not offload the default bearer to the WLAN. The above network conditions may be the status of the wireless cellular network and/or WLAN. On the other hand, after receiving the foregoing indication information, the core network device, for example, the PDN GW, decides to reserve the default bearer of the user equipment. Specifically, the PDN GW may reserve the current default bearer of the user equipment; the PDN GW may also update the current default bearer of the user equipment, that is, recalculate the QoS parameters of the default bearer, for example, the maximum rate of the aggregated bits of the default bearer ( Aggregate maximum bit rate, the cartridge is called AMBR) is reduced to a minimum. For example, when the subscription bandwidth of the user equipment is 20 megabytes, the PDN GW can reserve the bandwidth of the user equipment 1M in LTE, that is, modify the AMBR of the bandwidth from 20M to 1M. For another example, when there are multiple default bearers, the PDN GW can delete several default bearers and reserve the remaining default bearers, thereby implementing AMBR that modifies the bandwidth. Then, the PDN GW sends a bearer update request message to the base station, where the bearer update request message carries the reserved or updated default bearer. After receiving the bearer update request message, the base station reserves or updates the QoS parameter of the default bearer, and maintains the user equipment in the connected state in LTE.

In another optional implementation manner, the user equipment carries the default bearer by using the offload request message according to the indication information of the system message broadcast. For example, the user equipment will carry the bearer identifier corresponding to the default bearer, such as the evolved packet system (EPS) bearer ID, or the data radio bearer (DRB) ID carried in the offload request. The base station is used by the base station to identify the default bearer, and determines whether to maintain the connection state of the user equipment in the LTE according to the request of the user equipment and/or the status of the network.

In this embodiment, the base station may also obtain the information of the default bearer by itself. Still taking LTE as an example, when the radio bearer is established or the user equipment context is established, the MME may send a default bearer indication to the base station. For example, the MME may use a predetermined bearer identifier, or add a cell to indicate to the base station that the specified bearer identifier is the default bearer. For example, in the initial context setup request message, the MME indicates to the base station that a certain radio bearer is the default bearer. Alternatively, in the RRC reconfiguration complete message, the user equipment indicates to the base station that a certain bearer is the default bearer. Therefore, the base station can use the default bearer indication as part of the UE context, thereby saving the default bearer indication. When the base station decides to offload the radio bearer of the user equipment to the WLAN, the base station may choose not to The default bearer of the user equipment is offloaded to the WLAN, so that the user equipment is connected to the WLAN in the wireless cellular network. Alternatively, the default bearer may be offloaded to the WLAN, thereby changing the user equipment from the connected state to the idle state.

Herein, even if the base station learns the default bearer from the MME and determines to reserve the default bearer, the subsequent core network device, such as the PDN GW, may update the default bearer, for example, change the QOS parameter of the default bearer, and then update the default bearer. The QOS parameters are sent to the base station so that the base station adjusts the default bearer described above. After the PDN GW receives the above-mentioned indication information, the specific operations of retaining or updating the default bearer may be referred to the related parts above, and details are not described herein again.

In this embodiment, the sending, by the user equipment, the indication information to the wireless access point includes: in the process of the user equipment accessing the wireless access point, the user equipment may send a request message or an L3 attach request to the wireless device. The EAP authentication request message or the L3 attach request message includes the foregoing indication message, and is used to indicate that the connection state of the user equipment in the wireless cellular network is maintained.

S203: The user equipment is offloaded to the wireless local area network.

In this embodiment, the user equipment retains the default bearer during the offloading process to the WLAN, thereby ensuring that it maintains the connected state in the wireless cellular network.

In an alternative embodiment, the base station offloads the user equipment from the wireless cellular network to the wireless local area network. For example, the user equipment may offload the service of the user equipment to the wireless local area network by using the base station according to the offloading command of the base station.

In another alternative embodiment, the user equipment is offloaded to the wireless local area network by itself.

For example, the user equipment obtains a traffic offloading policy of the wireless network from the pre-configuration information of the Access Network Discovery and Selection Function (ANDSF) entity or itself, and initiates the offloading process of the wireless network by itself, instructing the core network device. For example, the PDN GW offloads the designated service to the WLAN, and the PDN GW performs offload according to the indication.

Once the user equipment's service is successfully offloaded to the WLAN, if the wireless cellular network is the industry A separate EPS bearer is established, and the base station may initiate (or initiate a user equipment) bearer deletion process to delete the corresponding EPS bearer or a part thereof. If the bearer deletion process is to be initiated, the WLAN access result message containing the successful offloaded service identifier includes an EPS bearer identifier (Bearer ID). If the WLAN that participates in the offloading does not have a data plane anchor point with the 3GPP network to which the user equipment is connected, the corresponding entire EPS bearer is deleted. If the WLAN participating in the offloading has a data plane anchor point with the 3GPP network to which the user equipment is connected, the part below the data plane anchor point is deleted. For example, if the data participating in the offloading WLAN is accessed by the base station to the Internet, only the air interface part of the corresponding bearer is deleted, that is, the part where the EPS is carried between the base station and the user equipment.

The wireless cellular network has the advantages of wide coverage, high-speed mobile support, and the disadvantages of low data rate, high price, and large transmission power. It is suitable for high-speed motion and outdoor large-scale activities. The wireless local area network has the advantages of high data rate, low price, small transmission power, and small coverage, and is suitable for relatively static, indoor small-scale activities and other scenarios. Considering the advantages and disadvantages of the wireless cellular network and the wireless local area network, the two systems can be aggregated, and the two can be organically combined to give full play to the advantages of both, and realize an efficient and low-cost communication process. Referring to FIG. 2a, a schematic diagram of a structure of a wireless cellular network and a wireless local area network is shown by using LTE as an example. The wireless access point 30 serves as an access bridge of the wireless local area network, and can directly access the evolved base station 20 of the LTE. The evolved base station 20 is connected to a core network 10 (core network) of the LTE. When the user equipment 40 wants to offload the service, it can simultaneously connect to the evolved base station 20 and the wireless access point 30 to simultaneously transmit data or data access through LTE and wireless local area networks. Compared with a pure wireless cellular network or a pure wireless local area network, combining the two systems can significantly improve the performance and throughput of the entire communication system, enabling efficient and low-cost communication.

The embodiment of the invention maintains the connection state of the user equipment in the wireless cellular network, thereby realizing normal and reasonable traffic distribution between the user equipment in the wireless cellular network and the wireless local area network, improving the user physical examination, and reducing the movement of the user equipment between the heterogeneous networks. Delay.

Referring to FIG. 3, FIG. 3 is a flowchart of another embodiment of a method for distributing a wireless network according to the present application. The method for offloading a wireless network in the present embodiment is described in the perspective of a base station in a wireless cellular network. The method for distributing a wireless network in this embodiment includes:

S301: The base station determines to offload the user equipment from the wireless cellular network to the wireless local area network.

In this embodiment, the base station may decide to offload the user equipment from the wireless cellular network to the WLAN according to the request of the user equipment, the load status of the base station, or the offload policy, and decide whether to keep the user equipment connected in the wireless cellular network. state.

In this embodiment, the method further includes: receiving, by the base station, a offloading request sent by the user equipment, where the offloading request is used to request that the radio bearer of the user equipment is offloaded from the wireless cellular network to the wireless local area network.

S302: The base station sends indication information to the user equipment, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network.

It is noted that the foregoing indication information may enable the user equipment to maintain a connection with the wireless cellular network even when offloaded to the wireless local area network, thereby realizing normal offloading of the user equipment between the wireless cellular network and the wireless local area network.

In this embodiment, if the base station determines to keep the user equipment in the connected state in the wireless cellular network, the base station sends the foregoing indication information to the user equipment, indicating that the user equipment remains in the connected state in the wireless cellular network or indicates that the user equipment is in the wireless cellular Stay connected in both the network and the WLAN.

For example, the base station may send a shunt command to the user equipment, where the shunt command is used to instruct the user equipment to offload the radio bearer of the user equipment to the WLAN. The offloading command includes the foregoing indication information. Further, the radio bearer does not include the default bearer of the user equipment, so that part or all of the dedicated bearer of the user equipment can be offloaded to the WLAN, but the default bearer is reserved, so that the user equipment is in the connected state in the wireless cellular network.

In this embodiment, the method further includes: receiving, by the base station, a default bearer of the user equipment sent by the core network device, where the default bearer is used in the connected state of the user equipment in the wireless cellular network. The core network device is located in a wireless cellular network, and may be, for example, an MME, where the MME may The base station sends a default bearer indication of the user equipment. When the MME sends the default bearer of the user equipment directly to the base station before the S201, the base station does not need to obtain the default bearer by using the user equipment. When the base station receives the offloading request sent by the user equipment and determines that the default bearer of the user equipment is reserved in the wireless cellular network, the fast switching of other dedicated bearers of the user equipment to the wireless local area network may be implemented, thereby improving the user experience.

In this embodiment, the method further includes: sending, by the base station, the indication message to the core network device, to indicate that the core network device reserves the default bearer of the user equipment, and implements a connection state of the user equipment in the wireless cellular network.

After the user equipment receives the offloading indication, the user performs the offloading operation to the WLAN according to the offloading indication, and the interaction between the entities and the related features, functions, and the like are corresponding to the description of the user equipment side method embodiment, which can be implemented as shown in FIG. The description of the example will not be repeated here.

In the embodiment of the present invention, by maintaining the connection state of the user equipment in the wireless cellular network, the normal and reasonable traffic distribution between the user equipment in the wireless cellular network and the wireless local area network is realized, the user physical examination is improved, and the user equipment is moved between the heterogeneous networks. Delay.

Referring to FIG. 4, FIG. 4 is a flowchart of another embodiment of a method for distributing a wireless network according to the present application. The method for distributing a wireless network in the present embodiment is described by using a wireless access point in a wireless local area network. The method of shunting wireless networks includes:

S401: The wireless access point receives the indication information sent by the user equipment, where the indication information is used to indicate that when the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in a connected state in the wireless cellular network.

S402: The wireless access point sends the indication information to the core network device, where the core network device reserves the default bearer of the wireless cellular network, where the default bearer is used for the user equipment to be in the connected state in the wireless cellular network.

In this embodiment, the indication information further indicates that the radio bearer of the user equipment is offloaded to the wireless local area network. The radio bearer may not include the default bearer.

Herein, the core network device may be a PDN-GW. After the core network device receives the indication information sent by the wireless access point, performing the offloading operation of the user equipment to the wireless local area network according to the indication information, the interaction between the entities, related features, functions, and the like, and the user equipment side method embodiment. For the description of the embodiment, reference may be made to the description of the embodiment shown in FIG. 2 and FIG. 3, and details are not described herein again.

In the embodiment of the present invention, by maintaining the connection state of the user equipment in the wireless cellular network, the normal and reasonable handover of the user equipment between the wireless cellular network and the wireless local area network is realized, the user physical examination is improved, and the user equipment is moved between the heterogeneous networks. Delay. Referring to FIG. 5, FIG. 5 is a flowchart of another embodiment of a method for distributing a wireless network according to the present application. The method for distributing a wireless network in this embodiment is described by using a core network device in a wireless cellular network. The method of shunting wireless networks includes:

S501: The core network device receives the indication information, where the indication information is used to indicate that when the user equipment switches from the wireless cellular network to the wireless local area network, the user equipment is in a connected state in the wireless cellular network.

In an implementation manner, the core network device may receive a radio bearer release request sent by the base station, where the radio bearer release request includes the foregoing indication information. In this implementation manner, the core network device may be an MME, and the MME has an interface with the base station, that is, is connected through the S1 interface.

In another implementation, the core network device may receive a create session request sent by the wireless access point, where the create session request includes the indication information. In this implementation manner, the core network device is a PDN-GW. Because the architecture is different, there is no interface between the PDN-GW and the base station, so the PDN-GW cannot receive the request sent by the base station, but can receive the request sent by the wireless access point.

S502: The core network device reserves a default bearer of the wireless cellular network, where the default bearer is used in the connected state in the wireless cellular network.

In this embodiment, the core network device may reserve or update the quality of service QOS of the default bearer. Taking the LTE as an example, when the PDN GW receives the indication that the user equipment maintains the connection state in the LTE or the user equipment maintains the dual connection indication in the LTE and the WLAN, the default bearer of the user equipment in the LTE may be retained or the default bearer may be updated. The specific solution, the interaction between the entities, and related features, functions, and the like correspond to the descriptions of the user equipment side method embodiments. See FIG. 2 to FIG. 4 . The description of the illustrated embodiment will not be repeated here.

In this embodiment, the method further includes: the core network device sending a default bearer to the base station, configured to offload the radio bearer of the user equipment to the wireless access point, and keep the user equipment in a connected state in the wireless cellular network.

In this embodiment, the core network device sends a default bearer to the base station, and the method includes: the core network device sends a radio bearer update command to the base station, where the base station reserves or updates the QOS of the default bearer. The radio bearer update command includes a default bearer of the current device or a default bearer of the core network device, so that the user equipment is in a connected state in the LTE.

It is explained here that the above radio bearer may not include a default bearer.

It should be noted that the method for offloading the wireless network of the present application has another implementation manner, and the user equipment can be based on the user's offloading policy, the load condition of the wireless cellular network, and/or the quality of the air interface channel, the load of the WLAN, and/or the quality of the air interface channel. And determining whether the connection state of the user equipment in the wireless cellular network is maintained when the WLAN is offloaded.

Referring to FIG. 6 , FIG. 6 is a flowchart of another embodiment of a method for distributing a wireless network according to the present application. The method for distributing a wireless network in this embodiment is described in terms of a user equipment, and the wireless network is shunted in this embodiment. Methods include:

S601: The user equipment sends indication information to the wireless access point, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network.

In this embodiment, the sending, by the user equipment, the indication message to the wireless access point, the method includes: sending, by the user equipment, the indication message to the wireless access point according to at least one of the following:

Access network discovery and selection function (and called ANDSF);

The service status of the user equipment on the wireless cellular network.

Taking LTE as an example, the user equipment can be based on the data distribution policy provided by the ANDSF, such as The data splitting policy of the ANDSF indicates that the user equipment remains in the connected state in the LTE, and the user equipment carries the indication to the WLAN.

Or, the user equipment, according to the service status of the user equipment, for example, when the user equipment determines that it has a GBR service, or jointly registers with the CS domain, the user equipment carries the indication to the WLAN, and is used to indicate that the user equipment remains connected in the LTE. state.

In this embodiment, the user equipment sends the indication information to the wireless access point, where the wireless access point instructs the core network device to reserve the default bearer of the wireless cellular network, where the default bearer is used to maintain the connection state between the user equipment and the base station.

S602: The user equipment is offloaded to the wireless local area network.

After the core network device receives the indication information sent by the wireless access point, perform the offloading operation of the user equipment to the wireless local area network according to the indication information, and other similar steps or definitions may be referred to the embodiment shown in FIG. 2 to FIG. Description, no longer repeat here.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of an embodiment of a user equipment 700 according to the present application. The user equipment 700 includes:

The receiving unit 701 is configured to receive indication information sent by the base station, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network;

The sending unit 702 is configured to send the indication information to the wireless access point, so that the wireless access point instructs the core network device to reserve the default bearer of the wireless cellular network, where the default bearer is used in the connected state 704 in the wireless cellular network;

The offloading unit 703 is configured to offload user equipment to the wireless local area network.

In an optional implementation manner, the base station offloads the user equipment from the wireless cellular network to the wireless local area network. For example, the user equipment may offload the service of the user equipment to the wireless local area network by using the base station according to the offloading command of the base station. In another alternative embodiment, the user equipment is offloaded to the wireless local area network by itself.

In this embodiment, the wireless access point may transparently transmit the indication information to the core network device, instructing the core network device to maintain the user equipment in the connected state in the wireless cellular network. For example, after receiving the indication information, the wireless access point may include the indication information in a Create Session Request message and carry it to the PDN GW. As an implementation to maintain the connection state of the user equipment in the wireless cellular network, the PDN GW may reserve the default bearer for the user equipment in the wireless cellular network.

The wireless access point is located in the wireless local area network, and the base station and the core network device are located in the wireless cellular network.

And the receiving unit is configured to receive the offloading command sent by the base station, where the offloading command is used to instruct the user equipment to offload the radio bearer of the user equipment to the wireless access point; where the offloading command includes the indication information.

The sending unit is further configured to send a offloading request to the base station, where the offloading request is used to request to offload the radio bearer of the user equipment to the wireless access point; wherein the radio bearer excludes the default bearer.

The sending unit is further configured to send a offloading request to the base station, where the offloading request is used to request to offload the radio bearer of the user equipment to the wireless access point; where the offloading request includes a default bearer, where the base station determines whether to maintain the user. The connected state of the device in the wireless cellular network.

In this embodiment, the user equipment further includes a reservation unit 704, configured to be in a wireless local area. During the offloading process of the network, the default bearer is reserved.

In the foregoing optional implementation, the eNB may send the indication of the user equipment connection state to the user equipment by using the RRC reconfiguration command, and the RRC layer of the user equipment receives the NAS layer that is delivered to the user equipment. Subsequently, the user equipment does not initiate a deactivation process of the default bearer, that is, the user equipment retains the default bearer. Specifically, the user equipment retains the default bearer, and may not carry the default bearer when the user equipment initiates the offload request to the base station, thereby ensuring that the user equipment is in the wireless cellular network when part or all of the service is offloaded to the WLAN. Still in the connected state. Or, the user equipment sends the default bearer indication to the base station when the base station initiates the offloading request, so that the base station can determine whether to maintain the user equipment in the wireless cellular network according to the request of the user equipment and/or the network status. The connection state, if the base station decides to maintain the connection state of the user equipment in the wireless cellular network, does not offload the default bearer to the WLAN. The above network conditions may be the status of the wireless cellular network and/or WLAN.

On the other hand, the core network device, for example, the PDN GW receives the above indication information, and then decides The default bearer for this user device is retained. Specifically, the PDN GW may reserve the current default bearer of the user equipment; the PDN GW may also update the current default bearer of the user equipment, that is, recalculate the QoS parameters of the default bearer, for example, the maximum rate of the aggregated bits of the default bearer ( Aggregate maximum bit rate, the cartridge is called AMBR) is reduced to a minimum. For example, when the subscription bandwidth of the user equipment is 20 megabytes, the PDN GW can reserve the bandwidth of the user equipment 1M in LTE, that is, modify the AMBR of the bandwidth from 20M to 1M. For another example, when there are multiple default bearers, the PDN GW can delete several default bearers and reserve the remaining default bearers, thereby implementing AMBR that modifies the bandwidth. Then, the PDN GW sends a bearer update request message to the base station, where the bearer update request message carries the reserved or updated default bearer. After receiving the bearer update request message, the base station reserves or updates the QoS parameter of the default bearer, and maintains the user equipment in the connected state in LTE.

In this embodiment, the base station may also obtain the information of the default bearer by itself. Still taking LTE as an example, when the radio bearer is established or the user equipment context is established, the MME may send a default bearer indication to the base station. For example, the MME may use a predetermined bearer identifier, or add a cell to indicate to the base station that the specified bearer identifier is the default bearer. For example, in the initial context setup request message, the MME indicates to the base station that a certain radio bearer is the default bearer. Alternatively, in the RRC reconfiguration complete message, the user equipment indicates to the base station that a certain bearer is the default bearer. Therefore, the base station can use the default bearer indication as part of the UE context, thereby saving the default bearer indication. When the base station decides to offload the radio bearer of the user equipment to the WLAN, it may choose not to offload the default bearer of the user equipment to the WLAN, thereby maintaining the user equipment in the wireless cellular network. In the connected state; or, the default bearer may be offloaded to the WLAN, thereby changing the user equipment from the connected state to the idle state.

The functional modules of the user equipment provided in this embodiment may be used to perform the processes of the method embodiments shown in FIG. 2 to FIG. 6. The interactions between the entities and related features, functions, and the like correspond to the descriptions of the user equipment side method embodiments. The specific working principle will not be described again. For details, refer to the description of each method embodiment.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a base station 800 according to an embodiment of the present application. The base station 800 is located in a wireless cellular network, and includes:

a determining unit 801, configured to determine to offload user equipment from the wireless cellular network to the wireless local area network;

The sending unit 802 is configured to send, to the user equipment, indication information, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network, so as to keep the user equipment connected to the wireless cellular network when the user equipment is offloaded to the wireless local area network.

In this embodiment, the base station 800 further includes a receiving unit 803, configured to receive a default bearer of the wireless cellular network sent by the core network device, where the default bearer is used in the connected state of the user equipment in the wireless cellular network. The core network device is located in a wireless cellular network.

In this embodiment, the receiving unit 803 is further configured to receive a offloading request sent by the user equipment, where the offloading request is used to request that the radio bearer of the user equipment is offloaded from the wireless cellular network to the wireless office. Domain network.

In this embodiment, the sending unit 802 is specifically configured to send, to the user equipment, a offloading command, where the offloading command is used to instruct the user equipment to offload the radio bearer for the user equipment to the wireless local area network; where the offloading command includes Indicate the indication information.

In this embodiment, the radio bearer excludes the default bearer. It is noted that the sending unit 802 can determine, according to the default bearer received by the receiving unit 803, that the default bearer is not included in the offloading command sent to the user equipment.

In this embodiment, the sending unit 802 is further configured to send, to the core network device, indication information, to indicate that the core network device reserves the default bearer of the wireless cellular network.

The functional modules of the base station provided in this embodiment may be used to perform the process of the method embodiment shown in FIG. 2 to FIG. 6. The interaction between the entities and related features, functions, and the like are corresponding to the descriptions of the user equipment side method embodiments. The working principle will not be described again. For details, refer to the description of each method embodiment.

Referring to FIG. 9 , FIG. 9 is a schematic structural diagram of a wireless access point 900 according to an embodiment of the present disclosure. The wireless access point 900 is located in a wireless local area network, and includes:

The receiving unit 901 is configured to receive the indication information sent by the user equipment, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network when the user equipment is offloaded from the wireless cellular network to the wireless local area network;

The sending unit 902 is configured to send indication information to the core network device, so that the core network device reserves the default bearer of the wireless cellular network, where the default bearer is used by the user equipment in the connected state in the wireless cellular network.

The core network device is located in a wireless cellular network.

In this embodiment, the indication information further indicates that the radio bearer of the user equipment is offloaded to none. Line LAN.

In this embodiment, the radio bearer excludes the default bearer.

The functional modules of the wireless access point provided in this embodiment may be used to perform the process of the method embodiment shown in FIG. 2 to FIG. 6. The interaction between the entities and related features, functions, and the like are corresponding to the description of the user equipment side method embodiment. The specific working principle is not described again. For details, refer to the description of each method embodiment.

Referring to FIG. 10, FIG. 10 is a schematic structural diagram of an embodiment of a core network device 1000 according to the present application. The core network device 1000 includes:

The receiving unit 1001 is configured to receive indication information, where the indication information is used to indicate that when the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in a connected state in the wireless cellular network;

The processing unit 1002 is configured to reserve a default bearer of the wireless cellular network, where the default bearer is used in the connected state of the user equipment in the wireless cellular network. The core network device is located in the wireless cellular network.

It is noted that the processing unit 1002 can leave the user equipment in the connected state in the wireless cellular network by retaining the default bearer according to the indication information received by the receiving unit 1001.

In this embodiment, the core network device 1000 further includes a sending unit 1003, configured to send a default bearer to the base station, to offload the wireless bearer of the user equipment to the wireless access point, and keep the user equipment in a connected state in the wireless cellular network. Wherein, the base station is located in a wireless cellular network.

In this embodiment, the processing unit 1002 is specifically configured to update the service quality Q0S of the default bearer. For example, the processing unit 1002 can update or retain the default bearer described above.

In this embodiment, the sending unit 1003 is specifically configured to send a radio bearer update to the base station. The command is used by the base station to update the quality of service QOS of the default bearer, where the radio bearer update command includes the updated default bearer. The transmitting unit 1003 may send the acquired QOS updated by the processing unit 1002 to the base station.

In this embodiment, the radio bearer excludes the default bearer.

The functional modules of the core network device provided in this embodiment may be used to perform the process of the method embodiment shown in FIG. 2 to FIG. 6. The interaction between the entities and related features, functions, and the like are corresponding to the description of the user equipment side method embodiment. The specific working principle is not described again. For details, refer to the description of each method embodiment.

In the embodiment of the present invention, by maintaining the connection state of the user equipment in the wireless cellular network, the normal and reasonable traffic distribution between the user equipment in the wireless cellular network and the wireless local area network is realized, the user physical examination is improved, and the user equipment is moved between the heterogeneous networks. Delay. Referring to FIG. 11, FIG. 11 is a schematic structural diagram of still another embodiment of the user equipment 1100 of the present application, including:

The sending unit 1101 is configured to send, to the wireless access point, indication information, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network;

The offloading unit, 1102, is configured to offload user equipment to the wireless local area network.

In this embodiment, the above-mentioned diverting unit 1102 can determine whether to offload, and send the indication information to the wireless access point through the sending unit 1101 when deciding to offload to the wireless local area network.

In this embodiment, the user equipment 1100 further includes a determining unit 1103, configured to determine, according to at least one of the following, sending the indication message to the wireless access point:

Access network discovery and selection function (and called ANDSF);

The service status of the user equipment on the wireless cellular network.

For example, the user equipment can be in accordance with the data offloading policy provided by the ANDSF. For example, the data splitting policy of the ANDSF indicates that the user equipment maintains a connected state in the LTE, and the user equipment carries the indication to the WLAN. Or, the user equipment according to its own service status, for example, when the user equipment determines that it has

When the GBR service is jointly registered to the CS domain, the user equipment carries the indication to the WLAN to indicate that the user equipment remains in the connected state in the LTE.

Referring to FIG. 12, FIG. 12 is a schematic structural diagram of still another embodiment of a user equipment 1200 according to the present application. The user equipment 1200 includes:

The receiver 1201 is configured to receive indication information sent by the base station, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network;

The transmitter 1202 is configured to send indication information to the wireless access point, so that the wireless access point instructs the core network device to reserve a default bearer of the wireless cellular network, where the default bearer is used in the connected state of the user equipment in the wireless cellular network;

The processor 1203 is configured to offload the user equipment to the wireless local area network.

The wireless access point is located in the wireless local area network, and the base station and the core network device are located in the wireless cellular network. The processor 1203 can offload the service of the user equipment to the wireless local area network according to the indication of the base station.

In this embodiment, the receiver 1201 is specifically configured to receive a offloading command sent by the base station, where the offloading command is used to instruct the user equipment to offload the radio bearer of the user equipment to the wireless access point. The foregoing split command includes indication information.

In this embodiment, the transmitter 1202 is further configured to send a offload request to the base station, where the offload request is used to request to offload the radio bearer of the user equipment to the wireless access point. Wherein, the radio bearer excludes the default bearer.

In this embodiment, the transmitter 1202 is further configured to send a offloading request to the base station, where the offloading request is used to request to offload the radio bearer of the user equipment to the wireless access point. The offloading request includes a default bearer, and is used by the base station to determine whether to maintain the connection state of the user equipment in the wireless cellular network.

In this embodiment, the processor 1203 is further configured to reserve a default bearer during the offloading process to the WLAN.

Further, as shown in FIG. 12, the user equipment may further include: a memory 1204, configured to store a program. In particular, the program can include program code, the program code including computer operating instructions. Optionally, the processor 1203 is further configured to execute a program stored in the memory 1204 to perform the foregoing functions.

The memory 1204 may include a high speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

Optionally, in a specific implementation, if the receiver 1201, the processor 1203, the transmitter 1202, and the memory 1204 are implemented independently, the receiver 1201, the processor 1203, the transmitter 1202, and the memory 1204 may be connected to each other through a bus and complete each other. Communication between. The bus may be an industry standard architecture (Industrial Standard Architecture) bus, a Periphera l Component (PCI) bus or an extended industry standard architecture (Extended Indus t Ry Standard Archi tecture, the cartridge is called EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 12, but it does not mean that there is only one bus or one type of bus.

Optionally, in a specific implementation, if the receiver 1201, the processor 1203, the transmitter 1202, and the memory 1204 are integrated on one chip, the receiver 1201, the processor 1203, the transmitter 1202, and the memory 1204 may pass through an internal interface. Complete mutual communication. The functional modules of the user equipment provided in this embodiment may be used to perform the processes of the method embodiments shown in FIG. 2 to FIG. 6. The interactions between the entities and related features, functions, and the like correspond to the descriptions of the user equipment side method embodiments. The specific working principle will not be described again. For details, refer to the description of each method embodiment.

Referring to FIG. 13, FIG. 13 is a schematic structural diagram of a base station 1300 according to an embodiment of the present application. The base station 1300 includes:

The processor 1301 is configured to determine that the user equipment is disconnected from the wireless cellular network to the wireless local area network. The transmitter 1302 is configured to send, to the user equipment, indication information, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network, to When the user equipment is offloaded to the wireless local area network, the connection is maintained with the wireless cellular network. The base station is located in a wireless cellular network.

In this embodiment, the base station 1300 further includes a receiver 1303, configured to receive a default bearer of the wireless cellular network sent by the core network device, where the default bearer is used in the connected state of the user equipment in the wireless cellular network, where the core network device is located. Wireless cellular network.

In this embodiment, the receiver 1303 is further configured to receive a offloading request sent by the user equipment, where the offloading request is used to request that the radio bearer of the user equipment is offloaded from the wireless cellular network to the wireless local area network.

In this embodiment, the transmitter 1302 is specifically configured to send a offloading command to the user equipment, where the offloading command is used to instruct the user equipment to offload the radio bearer for the user equipment to the wireless local area network. The offloading command includes indication information.

In this embodiment, the radio bearer excludes the default bearer.

In this embodiment, the transmitter 1302 is further configured to send, to the core network device, indication information, to indicate that the core network device reserves the default bearer of the wireless cellular network.

Further, as shown in FIG. 13 , the user equipment may further include: a memory 1 304, configured to: Store the program. Specifically, the program may include program code, and the program code includes computer operation instructions. Optionally, the processor 1301 is further configured to execute a program stored in the memory 1304 to perform the foregoing functions.

The memory 1304 may include a high speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

Optionally, in a specific implementation, if the receiver 1303, the processor 1301, the transmitter 1302, and the memory 1304 are implemented independently, the receiver 1303, the processor 1301, the transmitter 1302, and the memory 1304 may be connected to each other through a bus and complete each other. Communication between. The bus may be an industry standard architecture (Industrial Standard Architecture) bus, a Periphera l Component (PCI) bus or an extended industry standard architecture (Extended Indus t Ry Standard Archi tecture, the cartridge is called EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 13, but it does not mean that there is only one bus or one type of bus.

Optionally, in a specific implementation, if the receiver 1303, the processor 1301, the transmitter 1302, and the memory 1304 are integrated on one chip, the receiver 1303, the processor 1301, the transmitter 1302, and the memory 1304 may pass through an internal interface. Complete mutual communication.

Referring to FIG. 14, FIG. 14 is a schematic structural diagram of a wireless access point 1400 according to an embodiment of the present application. The wireless access point 1400 includes:

The receiver 1401 is configured to receive indication information sent by the user equipment, where the indication information is used to refer to When the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in a connected state in the wireless cellular network;

The transmitter 1402 is configured to send indication information to the core network device, so that the core network device reserves a default bearer of the wireless cellular network, where the default bearer is used in the connected state of the user equipment in the wireless cellular network.

The wireless access point is located in the wireless local area network, and the core network device is located in the wireless cellular network. In this embodiment, the indication information further indicates that the radio bearer of the user equipment is offloaded to the wireless local area network.

In this embodiment, the foregoing radio bearer excludes a default bearer.

Further, as shown in FIG. 14, the user equipment may further include: a memory 1403, configured to store a program. In particular, the program can include program code, the program code including computer operating instructions. Alternatively, the receiver 1401 and/or the transmitter 1402 can also be used to execute a program stored in the memory 1403 to perform the above functions.

The memory 1403 may include a high speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

Optionally, in a specific implementation, if the receiver 1401, the transmitter 1402, and the memory 1403 are implemented independently, the receiver 1401, the transmitter 1402, and the memory 1403 can be connected to each other through a bus and complete communication with each other. The bus may be an industry standard architecture (Industrial Standard Architecture), a peripheral device interconnect (Peripheral Component), or an extended industry standard architecture (Extended Indus). t ry Standard Archi tecture, the tube is called EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 14, but it does not mean that there is only one bus or one type of bus.

Optionally, in a specific implementation, if the receiver 1401, the transmitter 1402, and the memory 1403 are integrated on one chip, the receiver 1401, the transmitter 1402, and the memory 1403 can perform mutual communication through the internal interface. The functional modules of the wireless access point provided in this embodiment may be used to perform the process of the method embodiment shown in FIG. 2 to FIG. 6. The interaction between the entities and related features, functions, and the like are corresponding to the description of the user equipment side method embodiment. The specific working principle is not described again. For details, refer to the description of each method embodiment.

Referring to FIG. 15, FIG. 15 is a schematic structural diagram of an embodiment of a core network device 1500 according to the present application. The core network device 1500 includes:

The receiver 1501 is configured to receive indication information, where the indication information is used to indicate that when the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in a connected state in the wireless cellular network;

The processor 1502 is configured to reserve a default bearer of the wireless cellular network, where the default bearer is used by the user equipment in the connected state in the wireless cellular network.

The core network device is located in a wireless cellular network.

In this embodiment, the core network device 1500 further includes a sending unit 1503, configured to send a default bearer to the base station, to offload the wireless bearer of the user equipment to the wireless access point, and keep the user equipment in a connected state in the wireless cellular network. Wherein, the base station is located in a wireless cellular network.

In this embodiment, the processor 1502 is further configured to update the quality of service Q0S of the default bearer. In this embodiment, the transmitter 1503 is specifically configured to send a radio bearer update command to the base station, where the base station updates the service quality Q0S of the default bearer, where the radio bearer update command includes the updated default bearer.

In this embodiment, the radio bearer excludes the default bearer.

Further, as shown in FIG. 15, the user equipment may further include: a memory 15 04 for storing a program. Specifically, the program may include program code, and the program code includes computer operation instructions. Optionally, the processor 1502 is further configured to execute the program stored in the memory 1 504. Into the above functions.

The memory 1504 may include a high speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

Optionally, in a specific implementation, if the receiver 1501, the processor 1502, the transmitter 1503, and the memory 1504 are implemented independently, the receiver 1501, the processor 1502, the transmitter 1503, and the memory 1504 may be connected to each other through a bus and complete each other. Communication between. The bus may be an industry standard architecture (Industrial Standard Architecture) bus, a Periphera l Component (PCI) bus or an extended industry standard architecture (Extended Indus t Ry Standard Archi tecture, the cartridge is called EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 15, but it does not mean that there is only one bus or one type of bus.

Optionally, in a specific implementation, if the receiver 1501, the processor 1502, the transmitter 1503, and the memory 1504 are integrated on one chip, the receiver 1501, the processor 1502, the transmitter 1503, and the memory 1504 may pass through an internal interface. Complete mutual communication.

The functional modules of the core network device provided in this embodiment may be used to perform the process of the method embodiment shown in FIG. 1 to FIG. 6. The interaction between the entities and related features, functions, and the like are corresponding to the descriptions of the user equipment side method embodiments. The specific working principle is not described again. For details, refer to the description of each method embodiment.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device implementations described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. Another point, The mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (proces sor) to perform all or part of the steps of the methods of the various embodiments of the present application. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM, Random Acces s Memory), a magnetic disk or an optical disk, and the like, which can store program codes. medium.

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation made by using the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The scope of the invention is included in the scope of patent protection of this application.

Claims

The present invention is characterized in that: the user equipment receives the indication information sent by the base station, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network; The in-point sends the indication information, where the wireless access point instructs the core network device to reserve the default bearer of the wireless cellular network, where the default bearer is used to connect the user equipment to the wireless cellular network. The user equipment is offloaded to the wireless local area network; wherein the wireless access point is located in the wireless local area network, and the base station and the core network device are located in the wireless cellular network. The method of claim 1, wherein the receiving, by the user equipment, the indication information that is sent by the base station, the method includes: receiving, by the user equipment, a offloading command sent by the base station, where the offloading command is used by the user equipment The user equipment is instructed to offload the radio bearer of the user equipment to the wireless access point; wherein the offloading command includes the indication information. The method according to claim 1 or 2, further comprising: the user equipment sending a offloading request to the base station, where the offloading request is used to request to offload the radio bearer of the user equipment to the a wireless access point; wherein the radio bearer excludes the default bearer. The method according to claim 1 or 2, further comprising: the user equipment sending a offloading request to the base station, where the offloading request is used to request to offload the radio bearer of the user equipment to the a wireless access point, where the offloading request includes the default bearer, and is used by the base station to determine whether to maintain a connection state of the user equipment in the wireless cellular network. The method according to any one of claims 1 to 4, further comprising: the user equipment retaining the default bearer during a offloading process to the wireless local area network. A method for distributing a traffic, the method includes: the base station determines to offload the user equipment from the wireless cellular network to the wireless local area network; the base station sends the indication information to the user equipment, where the indication information is used to indicate that the user equipment is The wireless cellular network is in a connected state to maintain a connection with the wireless cellular network when the user equipment is offloaded to the wireless local area network; wherein the base station is located in the wireless cellular network. The method according to claim 6, further comprising: the base station receiving a default bearer of the wireless cellular network sent by a core network device, where the default bearer is used by the user equipment in the wireless cellular The network is in a connected state, and the core network device is located in the wireless cellular network. The method according to claim 6 or 7, further comprising: the base station receiving a offloading request sent by the user equipment, where the offloading request is used to request to perform radio bearer of the user equipment from the The wireless cellular network is offloaded to the wireless local area network. The method according to any one of claims 6 to 8, wherein the sending, by the base station, the indication information to the user equipment, the method includes: the base station sending a traffic off command to the user equipment, where the traffic off command And the user equipment is used to offload the radio bearer for the user equipment to the wireless local area network; where the offloading command includes the indication information. The method according to claim 8 or 9, wherein: the radio bearer excludes the default bearer.

The method according to any one of claims 6 to 10, further comprising: the base station transmitting the indication information to the core network device, to indicate that the core network device reserves the wireless The default bearer for cellular networks.

A shunting method, comprising:

The wireless access point receives the indication information sent by the user equipment, where the indication information is used to refer to When the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in a connected state in the wireless cellular network;

The wireless access point sends the indication information to the core network device, where the core network device reserves the default bearer of the wireless cellular network, where the default bearer is used by the user equipment in the wireless cellular network. In a connected state;

The wireless access point is located in the wireless local area network, and the core network device is located in the wireless cellular network.

The method of claim 12, wherein:

The indication information further indicates offloading the radio bearer of the user equipment to the wireless local area network.

The method of claim 12 or 13, wherein:

The radio bearer excludes the default bearer.

A shunting method, comprising:

The core network device receives the indication information, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network when the user equipment is offloaded from the wireless cellular network to the wireless local area network;

The core network device retains a default bearer of the wireless cellular network, where the default bearer is used in the connected state of the user equipment in the wireless cellular network; wherein the core network device is located in the wireless cellular The internet.

The method of claim 15, further comprising:

The core network device sends the default bearer to the base station, and is configured to offload the radio bearer of the user equipment to the wireless access point, and keep the user equipment in a connected state in the wireless cellular network, where the base station Located on the wireless cellular network. The method according to claim 15 or 16, wherein the core network device retains a default bearer of the wireless cellular network, specifically:

The core network device updates the quality of service QOS of the default bearer.

The method of claim 17, wherein the sending, by the core network device, the default bearer to the base station includes: The core network device sends a radio bearer update command to the base station, where the base station updates the quality of service QOS of the default bearer, where the radio bearer update command includes an updated default bearer.

The method according to any one of claims 15 to 18, wherein the receiving, by the core network device, the indication information comprises:

And receiving, by the core network device, a radio bearer release request sent by the base station, where the radio bearer release request includes the indication information.

The core network device receives a create session request sent by the wireless access point, where the create session request includes the indication information.

The method according to any one of claims 16 to 20, characterized in that:

The radio bearer excludes the default bearer.

A user equipment, comprising:

a receiving unit, configured to receive indication information sent by the base station, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network;

a sending unit, configured to send the indication information to the wireless access point, to enable the wireless access point to instruct the core network device to reserve a default bearer of the wireless cellular network, where the default bearer is used by the user equipment The wireless cellular network is in a connected state; the splitting unit is configured to offload the user equipment to the wireless local area network; wherein the wireless access point is located in the wireless local area network, where the base station and the core network device are located The wireless cellular network.

The user equipment according to claim 22, wherein the receiving unit is specifically configured to:

And receiving the offloading command sent by the base station, where the offloading command is used to instruct the user equipment to offload the radio bearer of the user equipment to the wireless access point; where the offloading command includes the indication information.

The user equipment according to claim 22 or 23, wherein the transmitting unit, Also used for:

Sending a offloading request to the base station, where the offloading request is used to request to offload the radio bearer of the user equipment to the wireless access point;

The radio bearer excludes the default bearer.

The user equipment according to claim 22 or 23, wherein the sending unit is further configured to:

The offloading request includes the default bearer, and is used by the base station to determine whether to maintain the connection state of the user equipment in the wireless cellular network.

The user equipment according to any one of claims 22 to 25, further comprising: a reservation unit, configured to reserve the default bearer during the offloading process to the wireless local area network.

A base station, comprising:

a determining unit, configured to determine to offload user equipment from the wireless cellular network to the wireless local area network;

a sending unit, configured to send the indication information to the user equipment, where the indication information is used to indicate that the user equipment is in a connected state in the wireless cellular network, so that when the user equipment is offloaded to the wireless local area network, Staying connected to the wireless cellular network;

The base station is located in the wireless cellular network.

The base station according to claim 27, further comprising:

a receiving unit, configured to receive a default bearer of the wireless cellular network sent by the core network device, where the default bearer is used by the user equipment in a connected state in the wireless cellular network, where the core network device is located in the wireless Cellular network.

The base station according to claim 27 or 28, wherein the receiving unit is further configured to:

Receiving a offload request sent by the user equipment, where the offload request is used to request a The radio bearer of the user equipment is offloaded from the wireless cellular network to the wireless local area network.

The base station according to any one of claims 27 to 29, wherein the sending unit is specifically configured to:

Sending a offloading command to the user equipment, where the offloading command is used to instruct the user equipment to offload the radio bearer for the user equipment to the wireless local area network; wherein the offloading command includes the indication information.

The base station according to claim 29 or 30, characterized in that:

The radio bearer excludes the default bearer.

The base station according to any one of claims 27 to 31, wherein the transmitting unit is further configured to:

And sending the indication information to the core network device, to indicate that the core network device reserves a default bearer of the wireless cellular network.

A wireless access point, comprising:

a receiving unit, configured to receive the indication information sent by the user equipment, where the indication information is used to indicate that when the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in a connected state in the wireless cellular network;

a sending unit, configured to send the indication information to a core network device, so that the core network device reserves a default bearer of the wireless cellular network, where the default bearer is used by the user equipment in the wireless cellular network Connected state

The wireless access point of claim 33, wherein:

The wireless access point of claim 33 or 34, wherein:

The radio bearer excludes the default bearer.

A core network device, comprising: a receiving unit, configured to receive indication information, where the indication information is used to indicate that when the user equipment is offloaded from the wireless cellular network to the wireless local area network, the user equipment is in a connected state in the wireless cellular network;

a processing unit, configured to reserve a default bearer of the wireless cellular network, where the default bearer is used by the user equipment in a connected state in the wireless cellular network; wherein the core network device is located in the wireless cellular network.

The core network device of claim 36, further comprising:

a sending unit, configured to send the default bearer to the base station, to offload the radio bearer of the user equipment to the wireless access point, and keep the user equipment in a connected state in the wireless cellular network, where the base station is located Wireless cellular network.

The core network device according to claim 36 or 37, wherein the processing unit is specifically configured to:

Update the quality of service QOS of the default bearer.

The core network device according to claim 38, wherein the sending unit is specifically configured to:

And transmitting, by the base station, a radio bearer update command, where the base station updates a quality of service QOS of the default bearer, where the radio bearer update command includes an updated default bearer.

The core network device according to any one of claims 37 to 39, wherein: the radio bearer excludes the default bearer.