WO2016119451A1

WO2016119451A1 - Method and device for user equipment to select network

Info

Publication number: WO2016119451A1
Application number: PCT/CN2015/088155
Authority: WO
Inventors: 史莉荣; 贺美芳; 黄河
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-01-26
Filing date: 2015-08-26
Publication date: 2016-08-04
Also published as: CN105898810A

Abstract

Disclosed are a method and device for a user equipment (UE) to select a network. The method comprises: a UE judging whether tight coupling is supported by itself; when it is judged that tight coupling is supported by itself, the UE selecting a destination system of the access or switching according to a selection condition, wherein the destination system comprises a first system and a second system, and the selection condition comprises: whether the first system supports tight coupling and a current tight coupling rule.

Description

Method and device for user equipment selection network

Technical field

This application relates to, but is not limited to, the field of mobile communications.

Background technique

With the continuous evolution of wireless communication technologies and standards, mobile packet services have been greatly developed, and the data throughput capability of single terminals is constantly improving. Taking the Long Term Evolution (LTE) system as an example, the downlink maximum rate of 100 Mbps data transmission can be supported in a 20 M bandwidth. In the subsequent enhanced LTE (LTE Advanced) system, the data transmission rate will be further improved, even Can reach 1Gbps.

The inflated growth of terminal data traffic has made all network resources incapable, especially in the case that next-generation communication technologies such as 3G and LTE cannot be widely deployed, and the user rate and traffic demand cannot be satisfied. The user experience is getting worse. How to prevent and change this situation is an issue that operators must consider. On the one hand, it is necessary to speed up the promotion of new technologies and network deployment; on the other hand, it is hoped that the existing networks and technologies can be enhanced to achieve rapid improvement of network performance. purpose. As is well known, in addition to the wireless network technology provided by The 3rd Generation Partnership Project (3GPP), wireless local area networks (WLANs), which are currently widely used, are especially based on electrical and electronic. The 802.11 standard WLAN of the Institute of Electrical and Electronics Engineers (IEEE) has been widely used in hotspot access coverage in homes, enterprises and even the Internet. Among them, the technical specifications proposed by the Wi-Fi Alliance are the most widely used. Therefore, the WiFi network is often equivalent to the WLAN network based on the IEEE 802.11 standard. In the case of no confusion, the WiFi module is used to describe the network. The WLAN wireless transceiver and processing module is supported in the node.

Under this premise, some operators and companies have proposed to combine WLAN with existing 3GPP networks to achieve joint transmission to achieve load shunting and improve network performance. 3GPP SA2 adopts the Access Network Discovery Selection Functions (ANDSF) scheme, which provides a target for the terminal according to the operator's policy. Mode of access to the network.

The Access Network Discovery and Selection Function (ANDSF) is used as an access anchor to implement intelligent network selection. The network and the terminal can effectively divide the network access, which is in line with future multi-network. Collaborative operational direction. ANDSF develops strategies to help end users choose the best access network standard and achieve synergy for multiple access methods.

In the related art, ANDSF is proposed in Release-8. When the UE is to select the network to register, if the 3GPP access network and the non-3GPP access network exist at the same time, the EPS (Evolved Packet System) can provide available access to the UE through the ANDSF according to the current location information of the UE. The network information, or the Inter-System Mobility Policy (ISMP), uses the information provided by the ANDSF to select an appropriate access network for registration. If multiple non-3GPP access networks exist at the same time, the EPS may provide an inter-system routing policy (ISRP) to the UE through the ANDSF according to the current location information of the UE, and the UE uses the information provided by the ANDSF to select an appropriate one. The access network is offloaded. The ANDSF is connected to the UE through the S14 interface, which uses the Open Mobile Alliance Device Management (OMA DM) protocol.

In the related art, the ANDSF can solve the problem of 3GPP handover to non-3GPP access network selection. It can also solve the problem of the offloading and routing of the multiple access terminals, for example, the UE (IP Flow Mobility capable UE, hereinafter referred to as IFOM capable UE) and the UE with the multi-access PDN connection capability ( A multiple access PDN Connectivity capable UE (abbreviated as MAPCON capable UE), a shunt routing problem with a non-seamless WLAN offload capable UE (NSWO capable UE).

ANDSF is a WLAN interworking scheme based on the core network. It does not consider the impact on the access network. In addition, because the ANDSF is a relatively static solution, it can not adapt to the dynamic changes of network load and channel quality. . Therefore, WLAN interworking discussions have also been conducted on the 3GPP access network. In R12 WLAN/3GPP wireless interoperation, a mechanism for performing WLAN offloading rules and triggering is introduced.

RAN-assisted WLAN sub-input in 3GPP R12 WLAN/3GPP wireless interworking In the flow solution, the 3GPP base station transmits the configuration parameters of the WLAN offload to the terminal by using the broadcast or unicast message, and the terminal performs the offload decision from the 3GPP to the WLAN or the WLAN to the 3GPP according to the received WLAN offload configuration parameter.

However, the core network mechanism and the auxiliary information mechanism from the wireless network cannot provide the network side with real-time use of load and channel conditions to consolidate the use of radio resources. In addition, data from the same bearer cannot be transmitted simultaneously on 3GPP and WLAN links. Therefore, the need for WLAN integration with 3GPP networks has been reintroduced at the 65th Plenary of the RAN (Radio Access Network).

The RAN-aggregated WLAN is integrated with the 3GPP network, allowing the WLAN to access the 3GPP access network, allowing data to be simultaneously transmitted on the WLAN and the 3GPP network, based on the current quality of the channel, compared to the WLAN offloading scheme that has been studied and relies on policy and triggering. And the use of system resources, scheduling in real time, thus improving user Qos (quality of service) and overall system capacity.

Since the ANDSF has been applied, and the R12RAN-assisted WLAN offload solution has also been standardized, the following problems arise when the WLAN and the 3GPP network are tightly coupled: How can the UE avoid conflicts between rules and how to proceed? The choice of the network has not yet been determined; for the network side: the UE needs to consider the R13 in the policy, and also needs the UE compatible with the R12.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

This document provides a method and apparatus for a UE to select a network, which can implement selection of a UE access destination system or a handover destination system in a tightly coupled network environment.

A method for a user equipment UE to select a network, the method comprising:

The UE determines whether it supports tight coupling;

When the UE determines that it supports tight coupling, it selects a destination system for access or handover according to the selection condition, and the destination system includes a first system and a second system, and the selection condition includes: whether the first system supports tight coupling and/or Or current tight coupling rules.

Optionally, the determining whether the UE supports the tight coupling includes: determining whether the UE has a tight coupling capability.

Optionally, the UE determines whether it has a tight coupling capability, and the UE determines whether the UE has the following capabilities. If yes, the UE has a tight coupling capability. If not, the UE does not have a tight coupling capability: The data sent by the first system and/or the second system can be received for aggregation, and data can be sent to the first system and/or the second system.

Optionally, the UE determines whether it supports tight coupling, and further includes: determining, by the UE, whether it is allowed to access the second system.

Optionally, the UE determines whether it is allowed to access the second system, and the UE determines whether the switch that allows the use of the second system is in an open state, and if yes, the UE allows access to the second system, If not, the UE does not allow access to the second system.

Optionally, the determining, by the UE, whether the first system supports the tight coupling, the determining, by the UE, that the first system supports tight coupling, or the UE, according to the indication information that is supported by the first system that supports tight coupling. The first system is determined to support tight coupling based on the tightly coupled channel quality parameters transmitted by the first system.

Optionally, the destination system for selecting access or handover according to the selection condition includes: when the first system supports tight coupling, and the current tight coupling rule is tight coupling priority, the UE selects to access or switch to The first system.

Optionally, the selection condition further includes one or more of the following conditions: whether the first system load is greater than a preset threshold, and whether the measured channel quality is better than a tightly coupled channel quality;

The destination system for selecting access or handover according to the selection condition includes:

The first system supports tight coupling, and the current tight coupling rule is tight coupling priority. When the first system load is greater than the preset threshold, the UE selects access according to the ANDSF rule sent by the access network discovery and selection function ANDSF server. Or the destination system of the switch;

The first system supports tight coupling, and when the current tight coupling rule is tight coupling priority, if the channel quality of the first system measured by the UE is better than the tightly coupled channel quality of the second system, the UE selects to access or switch to The first system, as shown in the figure, that the tightly coupled channel quality of the second system measured by the UE is better than the channel quality of the first system, the UE selects to access or switch to the second system;

When the current tight coupling rule is that the tight coupling is not prioritized, the UE selects the destination system for access or handover according to the ANDSF rule sent by the ANDSF server;

When the first system does not support tight coupling, the UE selects a destination system for access or handover according to an ANDSF rule sent by the ANDSF server.

Optionally, the first system comprises: a third generation partnership project 3GPP mobile system; the second system comprises: a wireless local area network WLAN system.

A device for selecting a network, located in a user equipment UE, the device comprising a capability judging module, a selecting module, wherein:

The capability judging module is configured to: determine whether the UE itself supports tight coupling;

The selecting module is configured to: when the capability determining module determines that the UE itself supports tight coupling, select a destination system for UE access or handover according to a selection condition; the destination system includes a first system and a second system, The selection condition includes whether the first system supports tight coupling and/or current tight coupling rules.

Optionally, the capability determining module is configured to determine whether the UE supports tight coupling by determining whether the UE itself has a tight coupling capability.

Optionally, the capability determining module is configured to: determine whether the UE itself has the following capability, if yes, the UE itself has a tight coupling capability, and if not, the UE itself does not have a tight coupling capability: the first can be received Data transmitted by the system and/or the second system is aggregated, and data can be transmitted to the first system and/or the second system.

Optionally, the capability determining module is further configured to: determine whether the UE itself supports tight coupling by determining whether the UE itself allows access to the second system.

Optionally, the capability determining module is configured to: determine whether the switch that the UE allows to use the second system is in an open state, and if yes, the UE itself allows access to the second system, such as If not, the UE itself is not allowed to access the second system.

Optionally, the selecting module is further configured to: determine, by the selecting module, that the first system supports tight coupling according to the indication information that supports the tight coupling sent by the first system, or the selecting module is configured according to the A tightly coupled channel quality parameter transmitted by a system determines that the first system supports tight coupling.

Optionally, the selecting module is configured to: determine that the first system supports tight coupling, and when the current tight coupling rule is tight coupling priority, select to access or switch to the first system.

The selection module is configured to: determine that the first system supports tight coupling, the current tight coupling rule is tight coupling priority, and when the first system load is greater than a preset threshold, according to the access network discovery and selection function ANDSF The ANDSF rule sent by the server selects the destination system for access or handover;

Determining that the first system supports tight coupling, and the current tight coupling rule is tight coupling priority. If the channel quality of the first system measured by the UE is better than the tightly coupled channel quality of the second system, then select access or switch to the first a system, if the tightly coupled channel quality of the second system measured by the UE is better than the channel quality of the first system, then selecting to access or switching to the second system;

Determining that the current tight coupling rule is that the tight coupling is not prioritized, and selecting the destination system for accessing or switching according to the ANDSF rule sent by the ANDSF server;

It is determined that the first system does not support tight coupling, and the destination system for access or handover is selected according to the ANDSF rule sent by the ANDSF server.

A computer readable storage medium storing computer executable instructions for performing the method of any of the above.

The method provided by the embodiment of the present invention can combine the rules of the two network selections, effectively utilize the functions that have been implemented by the current network, and reduce the network operation cost while improving the user QoS and the overall system capacity.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a flowchart of a method for a UE to select a network according to an embodiment of the present invention;

2 is a schematic structural diagram of selecting a network device according to Embodiment 2 of the present invention;

3 is a flowchart of a method for a UE to select a network according to an application example 1 of the present invention;

4 is a flowchart of a method for selecting a network by a UE according to an application example 2 of the present invention;

5 is a flowchart of a method for a UE to select a network according to an application example 3 of the present invention;

6 is a flowchart of a method for a UE to select a network according to an application example 4 of the present invention;

FIG. 7 is a flowchart of a method for a UE to select a network according to Embodiment 5 of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

Multi-system tight coupling means that the RAT (Radio Access Technology) 1 base station transmits data received from the core network to the UE through RAT1 and/or RAT2; the RAT1 base station will access the network from RAT1 and/or RAT2. The data is aggregated and sent to the core network. RAT1 is a 3rd Generation Partnership Project (3GPP) mobile system, for example including one of the following systems: third generation mobile communication technology (3G) system, fourth generation mobile communication technology (4G) system, fifth generation mobile communication technology ( 5G) system; RAT2 may be, for example, a wireless local area network (WLAN) system.

Embodiment 1

This embodiment describes a method for a UE to select a network. In this embodiment, the destination system includes a first system and a second system. The first system includes: a 3rd Generation Partnership Project 3GPP mobile system, the second system comprising: a wireless local area network WLAN system. As shown in Figure 1, it includes:

Step 1: The UE determines whether it supports tight coupling;

Whether the UE itself supports tight coupling includes the UE determining whether it has tight coupling capability. Optionally, the method further includes: determining, by the UE, whether to allow access to the second system.

Whether the UE has a tight coupling capability may be determined by the following method: the UE determines whether it has the following capabilities, and if so, the UE has a tight coupling capability, and if not, the UE does not have a tight coupling capability: the first system can be received And/or data delivered by the second system is aggregated, and data can be sent to the first system and/or the second system.

The UE determines whether it is allowed to access the second system, and may adopt the following method: the UE determines whether the switch that allows the use of the second system is in an open state, and if yes, the UE allows access to the second system, if not, the present The UE does not allow access to the second system.

Step 2: When the UE determines that it supports tight coupling, it selects a destination system for access or handover according to the selection condition, and the selection condition includes whether the first system supports tight coupling and/or current tight coupling rules.

The UE may determine whether the first system supports the tight coupling by using the following method, including: determining, by the UE, that the first system supports tight coupling according to the indication information that supports the tight coupling sent by the first system, or that the UE is configured according to the first system. The transmitted tightly coupled channel quality parameter determines that the first system supports tight coupling.

When the first system supports tight coupling and the current tight coupling rule is tight coupling priority, the UE chooses to access or switch to the first system.

In an embodiment, the foregoing selection condition further includes one or more of the following conditions: whether the first system load is greater than a preset threshold, and whether the measured channel quality is better than the tightly coupled channel quality;

The following is an example of several destination systems for selecting access or handover according to the above selection conditions. Since the present embodiment cannot be exhaustive, the method according to the embodiment and the related art should be able to know how the UE selects. The destination system for access or handover:

The first system supports tight coupling. The current tight coupling rule is tight coupling priority. The first system load is greater than the preset threshold. The UE selects the destination system for access or handover according to the ANDSF rule sent by the ANDSF server.

● The first system supports tight coupling, the current tight coupling rule is tight coupling priority, and the UE measures the first If the channel quality of a system is better than the tightly coupled channel quality of the second system, the UE selects to access or switch to the first system, and the tightly coupled channel quality of the second system measured by the UE is better than the channel quality of the first system. Then the UE selects to access or switch to the second system;

● When the current tight coupling rule is that the tight coupling is not prioritized, the UE selects the destination system for access or handover according to the ANDSF rule sent by the ANDSF server;

The first system does not support tight coupling, and the UE selects the destination system for access or handover according to the ANDSF rule sent by the ANDSF server.

Embodiment 2

This embodiment describes an apparatus for implementing a network for implementing the method of the first embodiment. The apparatus is located at the user equipment UE, as shown in FIG. 2, and includes a capability judging module 21 and a selecting module 22. In this embodiment, the destination system includes a first system and a second system, the first system includes: a third generation partnership project 3GPP mobile system, and the second system includes: a wireless local area network WLAN system. As shown in Figure 1, it includes:

The capability judging module 21 is configured to: determine whether the UE itself supports tight coupling;

The selecting module 22 is configured to: when the capability determining module determines that the UE itself supports tight coupling, select a destination system for accessing or switching according to a selection condition, where the selection condition includes: whether the first system supports tight coupling And/or current tight coupling rules.

The capability judging module 21 judges whether the UE itself has a tight coupling capability in the following manner: the capability judging module 21 judges whether the UE itself has the following capabilities, and if so, the UE itself has a tight coupling capability, and if not, the UE itself does not have a tight Coupling capability: being capable of receiving data transmitted by the first system and/or the second system for aggregation, and capable of transmitting data to the first system and/or the second system.

The capability judging module 21 determines whether the UE itself is allowed to access the second system in the following manner: the capability judging module 21 determines whether the switch that the UE allows to use the second system is in an open state, and if yes, the UE itself allows access. Enter the second system, if not, the UE itself does not allow Allow access to the second system.

Optionally, the selecting module 22 is further configured to: determine whether the first system supports tight coupling, and the determining module 22 determines, according to the indication information that is supported by the first system to support tight coupling, that the first system supports Tightly coupled, or the selection module 22 determines that the first system supports tight coupling based on the tightly coupled channel quality parameters transmitted by the first system.

The selection module 22 selects the destination system for UE access or handover based on the selection condition. Referring to the description in Embodiment 1, and subsequent application examples, details are not described herein again.

The following application examples are described using the LTE system as an example, and the 3G and 5G systems are also applicable.

Application example one

This example provides a method for a UE to select a network. In this example, the rule is tight coupling priority, and the access network notifies the UE that it supports tight coupling by using a message. As shown in FIG. 3, the following steps are included:

Step S102, the eNodeB (Evolved Node B) sends a system message, where the message includes indication information supporting tight coupling;

The indication information may be a newly added one, which may be referred to as a tightly coupled support indication cell, and the value is an enumerated type (TRUE, FALSE), TRUE indicates that tight coupling is supported, FALSE indicates that tight coupling is not supported, and the range of values is still It can be (TRUE), including the cell representation supporting tight coupling, and not including indicating that tight coupling is not supported.

Step S104: The UE receives the system message, and learns that the system supports tight coupling. The UE determines that it supports tight coupling. According to the set tight coupling priority rule, the UE selects the 3GPP network, and sends an RRC request message to the eNodeB, where the request message includes tight coupling. Information;

In this example, the UE itself supporting tight coupling includes the UE having tight coupling capabilities and the UE allowing the use of WLAN (eg, the smart switch that supports WLAN on the interface is on).

There are two ways for the UE to access the network: through 3GPP access, or directly through WLAN. If it is accessed through WLAN, tight coupling cannot be adopted. Therefore, when tight coupling is preferred, it must be accessed through 3GPP, and then further. Determine whether to use tight coupling or not to use tight coupling to transmit data.

The tight coupling priority rule may be that the UE is statically set in advance, or may be a boundary The face is manually selected.

In step S106, the eNodeB sends an RRC configuration message to the UE, where the message includes a tightly coupled parameter, such as an AP (Access Point) identifier or an AP address.

The tight coupling parameters may also include an indication of the activation of the multi-system tight coupling.

Step S108: The UE performs establishment of resources required for accessing the 3GPP, and returns a response message to the eNodeB.

If the UE has already accessed other systems, the UE may also switch to the 3GPP system after determining according to the above method.

Application example two

This example provides another method for the UE to select a network. In this example, the rule is tight coupling priority. The access network notifies the UE that it supports tight coupling by sending a channel quality parameter message. As shown in FIG. 4, the following steps are included:

Step S202, the eNodeB sends a system message, where the message includes a tightly coupled channel quality parameter, indicating that the access network supports tight coupling;

Step S204, the UE determines that it supports tight coupling, and the setting rule is tight coupling priority, and the measured channel quality (LTE system channel) is better than the tightly coupled channel (WLAN system channel) quality parameter of the system message, and the UE selects 3GPP. The network sends an RRC request message to the eNodeB, where the request message includes the information that is tightly coupled;

If the tightly coupled channel (WLAN system channel) quality of the system message transmission is better than the channel quality measured by the UE (LTE system channel), the UE selects the WLAN system access.

The judgment of channel quality is added in this example to ensure the quality of service.

Step S206, the eNodeB sends an RRC configuration message to the UE, where the message includes a tight coupling parameter, such as an AP identifier or an AP address.

Step S208, the UE performs related resource establishment, and returns a response message to the eNodeB.

Application example three

This example provides another method for the UE to select a network. In this example, the rule is that the tight coupling is not prioritized, and the access network notifies the UE that it supports tight coupling by using a message, as shown in FIG. 5, including the following steps:

Step S302, the eNodeB sends a system message, where the message includes indication information supporting tight coupling;

The indication information is a new one, the name is a tight coupling support indication, the value is an enumerated type (TRUE, FALSE), TRUE indicates that tight coupling is supported, FALSE indicates that tight coupling is not supported, and the value range can also be (TRUE) ), including the cell representation to support tight coupling, and not including indicating that tight coupling is not supported.

Step S304, the UE determines that it supports tight coupling. According to the set tight coupling non-priority rule, the UE sends an information request to the ANDSF server, the ANDSF server returns an ANDSF rule, and the UE performs network selection according to the ANDSF rule sent by the ANDSF server.

The tight coupling priority rule may be that the UE is statically set in advance, or may be manually selected through an interface.

The information request sent by the UE is used to request network selection. How the UE obtains the ANDSF rule from the ANDSF server, and how to perform network selection according to the received ANDSF rule can be implemented according to the prior art, and will not be described herein.

Application example four

This example provides another method for the UE to select a network. In this example, the rule is tight coupling priority. After receiving the message of the UE, the access network feeds back to the UE whether the access network supports tight coupling, as shown in FIG. 6 . Show, including the following steps:

Step S402, the UE determines that it supports tight coupling. According to the set tight coupling priority rule, the UE selects the 3GPP network, and sends an RRC request message to the eNodeB, where the request message includes tightly coupled information.

Step S404, the eNodeB determines that the load is higher than a preset threshold or does not support tight coupling, and then sends the UE to the UE. Returning the RRC reject message, the message contains the reason for the rejection, such as: the load is too high or does not support tight coupling;

In this example, adding the eNodeB's judgment on the load is also to consider the quality of service of the user. If the eNodeB determines that the load does not exceed the preset threshold, the UE selects the 3GPP system access according to the steps of the foregoing example.

Step S406, the UE sends an information request to the ANDSF server, and the UE performs network selection according to the ANDSF rule sent by the ANDSF server.

Application example five

This example provides another method for the UE to select a network. In this example, the rule is that the tight coupling is not prioritized. When the rule is tightly coupled and not prioritized, the 3GPP system may not perform the judgment of tight coupling, as shown in FIG. 5 . , including the following steps:

Step S502, the UE determines that it supports tight coupling, and according to the set tight coupling non-priority rule, the UE sends an information request to the ANDSF server;

Step S504, the UE performs network selection according to the ANDSF rule returned by the ANDSF server.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

The embodiments of the present invention can combine the rules of the two network selections, effectively utilize the functions that have been implemented by the current network, and reduce the network operation cost while improving the user QoS and the overall system capacity.

Claims

A method for a user equipment UE to select a network, the method comprising:

The UE determines whether it supports tight coupling;

When the UE determines that it supports tight coupling, it selects a destination system for access or handover according to the selection condition, and the destination system includes a first system and a second system, and the selection condition includes: whether the first system supports tight coupling and/or Or current tight coupling rules.
The method of claim 1 wherein

Whether the UE determines whether it supports tight coupling, includes: determining whether the UE has tight coupling capability.
The method of claim 2, wherein

The UE determines whether it has a tight coupling capability, including:

The UE determines whether it has the following capabilities, and if so, the UE has tight coupling capability, and if not, the UE does not have tight coupling capability:

The data sent by the first system and/or the second system can be received for aggregation, and data can be sent to the first system and/or the second system.
The method of claim 2, wherein

Whether the UE determines whether it supports tight coupling, the method further includes: determining, by the UE, whether it is allowed to access the second system.
The method of claim 4, wherein

The UE determines whether it is allowed to access the second system, including:

The UE determines whether the switch that allows the use of the second system is in an open state, and if yes, the local UE allows access to the second system, and if not, the local UE does not allow access to the second system.
The method of claim 1 wherein

The UE determines whether the first system supports tight coupling, including:

Determining, by the UE, that the first system supports tight coupling according to the indication information that supports the tight coupling sent by the first system, or

The UE determines that the first system supports tight coupling according to the tightly coupled channel quality parameter sent by the first system.
The method of claim 1 wherein

The destination system for selecting access or handover according to the selection condition includes:

The UE selects to access or switch to the first system when the first system supports tight coupling and the current tight coupling rule is tight coupling priority.
The method according to claim 1 or 7, wherein

The selection condition further includes one or more of the following conditions: whether the first system load is greater than a preset threshold, and whether the measured channel quality is better than the tightly coupled channel quality;

The destination system for selecting access or handover according to the selection condition includes:

The first system supports tight coupling, and the current tight coupling rule is tight coupling priority. When the first system load is greater than the preset threshold, the UE selects access according to the ANDSF rule sent by the access network discovery and selection function ANDSF server. Or the destination system of the switch;

The first system supports tight coupling, and when the current tight coupling rule is tight coupling priority, if the channel quality of the first system measured by the UE is better than the tightly coupled channel quality of the second system, the UE selects to access or switch to a first system, if the tightly coupled channel quality of the second system measured by the UE is better than the channel quality of the first system, the UE selects to access or switch to the second system;

When the current tight coupling rule is that the tight coupling is not prioritized, the UE selects the destination system for access or handover according to the ANDSF rule sent by the ANDSF server;

When the first system does not support tight coupling, the UE selects a destination system for access or handover according to an ANDSF rule sent by the ANDSF server.
The method of claim 1 wherein

The first system includes: a 3rd Generation Partnership Project 3GPP mobile system;

The second system includes: a wireless local area network WLAN system.
A device for selecting a network, located in a user equipment UE, the device comprising a capability judging module, a selecting module, wherein:

The capability judging module is configured to: determine whether the UE itself supports tight coupling;

The selecting module is configured to: when the capability determining module determines that the UE itself supports tight coupling, select a destination system for UE access or handover according to a selection condition; the destination system includes a first system and a second system, The selection condition includes whether the first system supports tight coupling and/or current tight coupling rules.
The device according to claim 10, wherein

The capability judging module is configured to: determine whether the UE supports tight coupling by determining whether the UE itself has tight coupling capability, wherein determining whether the UE itself has the following capabilities, if any, the UE itself has tight coupling capability If not, the UE itself does not have tight coupling capability:

The data sent by the first system and/or the second system can be received for aggregation, and data can be sent to the first system and/or the second system.
The apparatus according to claim 11, wherein

The capability judging module is further configured to: determine whether the UE supports access to the second system by determining whether the UE is allowed to access the second system, and whether the UE supports the tight coupling to determine whether the UE itself is allowed to access the second system, including:

The capability judging module is further configured to: determine whether the UE supports the tight coupling by determining whether the UE itself allows access to the second system, where it is determined whether the switch that the UE allows to use the second system is in an open state, if Yes, the UE itself allows access to the second system, and if not, the UE itself does not allow access to the second system.
The device according to claim 14, wherein

The selecting module is configured to: determine that the first system supports tight coupling according to the indication information that supports the tight coupling sent by the first system, or determine, according to the tightly coupled channel quality parameter sent by the first system, The first system supports tight coupling.
The device according to claim 10, wherein

The selection module is configured to: determine that the first system supports tight coupling, and when the current tight coupling rule is tight coupling priority, select to access or switch to the first system.
A computer readable storage medium storing computer executable instructions for performing the method of any of claims 1-9.