CN104255066B

CN104255066B - Access the selection method and equipment of network

Info

Publication number: CN104255066B
Application number: CN201380000264.0A
Authority: CN
Inventors: 李秉肇; 陈燕燕; 高永强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-04-11
Filing date: 2013-04-11
Publication date: 2018-12-07
Anticipated expiration: 2033-04-11
Also published as: WO2014166095A1; CN104255066A

Abstract

The present invention provides a kind of selection method and equipment for accessing network.Method includes: the service access strategy that access network equipment obtains user equipment (UE), and it is that the access network selection policies that the UE is provided obtain that the service access strategy, which is according to access network discovery and selection function ANDSF module,；Network is accessed according to the service selection that the service access strategy is the UE.Scheme provided in an embodiment of the present invention, it is that UE generates service access strategy according to the access network selection policies that ANDSF module provides, UE can access network according to service access strategy, this dynamic process can make when the access system that access network equipment controls mutually conflicts with the strategy that ANDSF is provided, and can be UE selection access network the most suitable.

Description

Method and device for selecting access network

Technical Field

The present invention relates to communications technologies, and in particular, to a method and a device for selecting an access network.

Background

An Access Network Discovery and Selection Function (ANDSF) module is a newly introduced third generation partnership project (3)^rdGeneration Partner Project, abbreviated: 3 GPP). The ANDSF has data management and control functions, and is capable of providing assistance data required for discovering a user access network and performing access network selection in response to a request for performing access network selection by a User Equipment (UE). The ANDSF may provide three types of assistance data to the UE, the first type being an inter-system mobility policy, such as whether inter-system mobility is allowed or not; the second type is access network discovery information, such as access network information of all access systems in the vicinity of the UE; the third type is an intersystem routing policy, which includes some filtering rules, such as whether a certain specific service flow or a specific Access Point (Access Point Name, abbreviated as APN) allows Access to a certain Access system, and so on.

And the UE selects the most appropriate access network according to the auxiliary data provided by the ANDSF module and by combining the characteristics of the current service, so as to realize the effective unloading of the data service.

However, the ANDSF module also has some problems to be solved, for example, the policy cannot be dynamically modified according to the RRM condition of the access network side, and once the access system controlled by the access network device conflicts with the policy provided by the ANDSF module, the UE cannot access the most suitable network.

Disclosure of Invention

The embodiment of the invention provides a method and equipment for selecting an access network, which can select the most appropriate access network for UE when an access system controlled by access network equipment conflicts with a strategy provided by ANDSF.

A first aspect of the present invention provides a method for selecting an access network, including:

the method comprises the steps that access network equipment obtains a service access strategy of User Equipment (UE), wherein the service access strategy is obtained according to an access network selection strategy provided by an Access Network Discovery and Selection Function (ANDSF) module for the UE;

and selecting an access network for the service of the UE according to the service access strategy.

In a first implementation manner of the first aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or, access point information of service permission access and/or service prohibition access;

and/or, time information of service permission access and/or service prohibition access;

and/or address information for services to allow access and/or disallow access.

With reference to the first aspect and the first implementation manner of the first aspect, in a second implementation manner of the first aspect of the present invention, the method further includes: acquiring an identifier of a Radio Access Bearer (RAB) or an identifier of User Equipment (UE) corresponding to the service access strategy;

then said selecting an access network for the service of the UE according to the service access policy comprises: and selecting an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the first aspect of the present invention, in a third implementation manner of the first aspect of the present invention, after the selecting an access network for the service of the UE according to the service access policy, the method further includes: and sending an access indication to the UE, wherein the access indication carries a service identifier and/or the access network identifier.

With reference to the third implementation manner of the first aspect of the present invention, in a fourth implementation manner of the first aspect of the present invention, the access network identifier is an access network type and/or an identifier of an access point in the access network.

With reference to the third implementation manner of the first aspect of the present invention, in a fifth implementation manner of the first aspect of the present invention, before the sending the access indication to the UE, the method further includes: the access network device sends a command message to the UE instructing the UE to follow the network-side command without self-decision of its access network.

With reference to the fifth implementation manner of the first aspect of the present invention, in a sixth implementation manner of the first aspect of the present invention, the command message is specifically an indication that the network supports WLAN offload capability.

With reference to the second implementation manner of the first aspect of the present invention, in a seventh implementation manner of the first aspect of the present invention, the selecting an access network for a service of the UE according to the service access policy includes: judging whether the load of the corresponding network exceeds a preset percentage or not according to the sequence of the RAT priority of the service from high to low; and if so, selecting the network with the highest priority as the access network of the UE.

With reference to the first aspect of the present invention, in an eighth implementation manner of the first aspect of the present invention, the obtaining, by the access network device, a service access policy of the UE specifically includes: receiving a service access strategy sent by core network equipment, wherein the service access strategy is generated by the core network according to an access network selection strategy provided by the UE or the ANDSF module; or receiving a service access policy sent by the UE, wherein the service access policy is generated by the UE according to an access network selection policy provided by the ANDSF module.

A second aspect of the present invention provides a method for selecting an access network, including:

the core network equipment obtains an access network selection strategy provided for the user equipment UE by an access network discovery and selection function ANDSF module;

and generating a service access strategy for the UE according to the access network selection strategy, and sending the service access strategy of the UE to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy of the UE.

With reference to the second aspect of the present invention, in a first implementation manner of the second aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

With reference to the second aspect and the first implementation manner of the second aspect, in the second implementation manner of the second aspect of the present invention, the method further includes: and sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to the access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the second aspect of the present invention, in a third implementation manner of the second aspect of the present invention, the generating a service access policy for the UE according to the access network selection policy includes: determining services borne in each radio access bearer RAB of UE, determining ANDSF strategies corresponding to each service, and generating service access strategies for the UE according to the ANDSF strategies; or determining services borne in all RABs of the UE, determining an ANDSF strategy corresponding to the services, and generating a service access strategy for the UE according to the ANDSF strategy.

With reference to the second aspect of the present invention, in a fourth implementation manner of the second aspect of the present invention, the obtaining, by the core network device, an access network selection policy provided by the ANDSF module to the UE includes: the core network equipment receives an access network selection strategy of the UE from an ANDSF module; or, the core network device receives an access network selection policy uploaded by the UE, where the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module.

A third aspect of the present invention provides a method for selecting an access network, including:

user Equipment (UE) receives an access network selection indication sent by access network equipment;

and selecting the access network according to the access network selection indication.

With reference to the third aspect of the present invention, in a first implementation manner of the third aspect of the present invention, before receiving the access network selection indication sent by the access network device, the method further includes: the UE obtains an access network selection strategy provided by an Access Network Discovery and Selection Function (ANDSF) module; generating a service access strategy according to the access network selection strategy; and sending the generated service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy.

With reference to the first implementation manner of the third aspect of the present invention, in a second implementation manner of the third aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

With reference to the first embodiment or the second embodiment of the third aspect of the present invention, in a third embodiment of the third aspect of the present invention, the method further includes: and sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the second implementation manner of the third aspect of the present invention, in a fourth implementation manner of the third aspect of the present invention, the generating a service access policy according to the access network selection policy includes: determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies according to the ANDSF strategies; or determining services borne in all RABs of the UE, determining an ANDSF strategy corresponding to the services, and generating a service access strategy according to the ANDSF strategy.

With reference to the third aspect of the present invention, in a fifth implementation manner of the third aspect of the present invention, the access network selection indication carries a service identifier and/or an access network identifier.

With reference to the fifth implementation manner of the third aspect of the present invention, in a sixth implementation manner of the third aspect of the present invention, the access network identifier is an access network type and/or an identifier of an access point in an access network.

With reference to the third aspect of the present invention, in a seventh embodiment of the third aspect of the present invention, the method further comprises: the UE receives a command message sent by access network equipment, wherein the command message is used for instructing the UE to follow a network side command without self-decision of an access network of the UE; and stopping network selection according to the ANDSF strategy according to the command message, and determining an access network according to the access network selection indication.

The fourth aspect of the present invention provides a method for selecting an access network, including:

user Equipment (UE) obtains an access network selection strategy and information of access network equipment, wherein the access network selection strategy is provided for the UE by an Access Network Discovery and Selection Function (ANDSF) module;

and determining the access network according to the access network selection strategy and the information of the access network equipment.

With reference to the fourth aspect of the present invention, in a first implementation manner of the fourth aspect of the present invention, the information of the access network device includes: load information of the access network device or access tendency of the access network device.

With reference to the first implementation manner of the fourth aspect of the present invention, in a second implementation manner of the fourth aspect of the present invention, the access tendency of the access network device includes: the access network equipment prefers the UE to access a first network, prefers the UE to access a second network, or does not interfere with the access network selection of the UE.

With reference to the fourth aspect of the present invention, in a third implementation manner of the fourth aspect of the present invention, the access network selection policy includes: and Radio Access Technology (RAT) priority of Radio Access Bearer (RAB), and the corresponding load threshold of the access network equipment when the RAT priority takes effect.

With reference to the third implementation manner of the fourth aspect of the present invention, in a fourth implementation manner of the fourth aspect of the present invention, the determining an access network according to an access network selection policy and information of an access network device includes: determining an access network selection strategy to be used according to the load information of the access network equipment; and determining the access network to be preferentially used according to the access network selection strategy.

With reference to the first implementation manner or the second implementation manner of the fourth aspect of the present invention, in a fifth implementation manner of the fourth aspect of the present invention, the determining an access network according to an access network selection policy and information of an access network device includes: and in the network which is allowed to be accessed by the access network selection strategy, selecting an access network according to the access tendency indication.

With reference to the fifth implementation manner of the fourth aspect of the present invention, in a sixth implementation manner of the fourth aspect of the present invention, the information of the access network device further includes an access factor, and the method further includes:

generating a random factor;

comparing the random factor with the access factor to obtain a comparison result;

selecting an access network according to the access tendency indication, specifically including:

if the comparison result accords with a preset rule, selecting an access network according to the access tendency indication;

and if the comparison result does not accord with the preset rule, waiting for the preset time and then generating a new random factor again.

The fifth aspect of the present invention provides a method for selecting an access network, including:

an Access Network Discovery and Selection Function (ANDSF) module sends an access network selection policy to a User Equipment (UE), wherein the access network selection policy comprises: the method comprises the steps that the RAT priority of a service wireless access technology and the load threshold of corresponding access network equipment when the RAT priority takes effect; and the access network selection strategy is used for the UE to determine the access network of the UE service according to the access network selection strategy and the load information of the access network equipment.

A sixth aspect of the present invention provides a method for selecting an access network, including:

the method comprises the steps that access network equipment sends information of the access network equipment to User Equipment (UE), wherein the information of the access network equipment comprises load information of the access network equipment or access tendency of the access network equipment; and the information of the access network equipment is used for the UE to determine the access network of the UE service according to the information of the access network equipment and an access network selection strategy provided by an access network discovery and selection function ANDSF module.

With reference to the sixth aspect of the present invention, in a first implementation manner of the sixth aspect of the present invention, the information of the access network device further includes an access factor, where the access factor is used for the UE to compare the generated random factor with the access factor and obtain a comparison result, and if the comparison result meets a preset rule, the UE selects an access network according to the access tendency indication; and if the comparison result does not accord with the preset rule, the UE waits for the preset time and then generates a new random factor again.

A seventh aspect of the present invention provides an access network device, including:

an obtaining module, configured to obtain a service access policy of a user equipment UE, where the service access policy is obtained according to an access network selection policy provided by an access network discovery and selection function ANDSF module for the UE;

and the selection module is used for selecting an access network for the service of the UE according to the service access strategy.

With reference to the seventh aspect, in a first implementation manner of the seventh aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

With reference to the seventh aspect or the first implementation manner of the seventh aspect, in a second implementation manner of the seventh aspect, the obtaining module is further configured to: acquiring an identifier of a Radio Access Bearer (RAB) or an identifier of User Equipment (UE) corresponding to the service access strategy; the selection module is further configured to: and selecting an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the seventh aspect, in a third implementation manner of the seventh aspect of the present invention, the access network device further includes: and the sending module is used for sending an access indication to the UE, wherein the access indication carries a service identifier and/or the access network identifier.

With reference to the third implementation manner of the seventh aspect of the present invention, in a fourth implementation manner of the seventh aspect of the present invention, the access network identifier is an access network type and/or an identifier of an access point in the access network.

With reference to the third implementation manner of the seventh aspect of the present invention, in a fifth implementation manner of the seventh aspect of the present invention, the sending module is further configured to: sending a command message to the UE instructing the UE to follow the network-side command without self-decision of its access network.

With reference to the fifth implementation manner of the seventh aspect of the present invention, in a sixth implementation manner of the seventh aspect of the present invention, the command message is specifically an indication that the network supports WLAN offload capability.

With reference to the second implementation manner of the seventh aspect of the present invention, in a seventh implementation manner of the seventh aspect of the present invention, the selecting module is specifically configured to: judging whether the load of the corresponding network exceeds a preset percentage or not according to the sequence of the RAT priority of the service from high to low; and if so, selecting the network with the highest priority as the access network of the UE.

With reference to the seventh aspect of the present invention, in an eighth implementation manner of the seventh aspect of the present invention, the obtaining module includes: a first receiving unit, configured to receive a service access policy sent by a core network device, where the service access policy is generated by the core network according to an access network selection policy provided by the UE or the ANDSF module; or, the second receiving unit is configured to receive a service access policy sent by the UE, where the service access policy is generated by the UE according to an access network selection policy provided by the ANDSF module.

An eighth aspect of the present invention provides a core network device, including:

an obtaining module, configured to obtain an access network selection policy provided by an access network discovery and selection function ANDSF module to a user equipment UE;

and the generating module is used for generating a service access strategy for the UE according to the access network selection strategy and sending the service access strategy of the UE to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy of the UE.

With reference to the eighth aspect of the present invention, in a first implementation manner of the eighth aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

With reference to the eighth aspect or the first embodiment of the eighth aspect, in a second embodiment of the eighth aspect of the present invention, the method further includes:

and the sending module is used for sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to the access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the eighth aspect of the present invention, in a third implementation manner of the eighth aspect of the present invention, the generating module specifically includes:

the system comprises a first generation unit, a second generation unit and a third generation unit, wherein the first generation unit is used for determining services borne in all Radio Access Bearers (RABs) of the UE, determining ANDSF strategies corresponding to all the services and generating service access strategies for the UE according to the ANDSF strategies;

or, the second generating unit is configured to determine services carried in all RABs of the UE, determine an ANDSF policy corresponding to the service, and generate a service access policy for the UE according to the ANDSF policy.

With reference to the first implementation manner of the eighth aspect of the present invention, in a fourth implementation manner of the eighth aspect of the present invention, the obtaining module includes:

a first receiving unit, configured to receive an access network selection policy of the UE from an ANDSF module;

or a second receiving unit, configured to receive an access network selection policy uploaded by the UE, where the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module.

A ninth aspect of the present invention provides a user equipment, comprising:

a receiving module, configured to receive an access network selection indication sent by an access network device;

and the selection module is used for selecting the access network according to the access network selection indication.

With reference to the ninth aspect of the present invention, in the first embodiment of the ninth aspect of the present invention, the method further includes:

an obtaining module, configured to obtain an access network selection policy provided by an access network discovery and selection function ANDSF module;

the generating module is used for generating a service access strategy according to the access network selection strategy;

and the sending module is used for sending the generated service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy.

With reference to the first implementation manner of the ninth aspect of the present invention, in a second implementation manner of the ninth aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

With reference to the first implementation manner or the second implementation manner of the ninth aspect of the present invention, in a third implementation manner of the ninth aspect of the present invention, the sending module is further configured to: and sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the first implementation manner of the ninth aspect of the present invention, in a fourth implementation manner of the ninth aspect of the present invention, the generating module specifically includes:

the first determining unit is used for determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies according to the ANDSF strategies;

or, the second determining unit is configured to determine services carried in all RABs of the UE, determine an ANDSF policy corresponding to the service, and generate a service access policy according to the ANDSF policy.

With reference to the ninth aspect of the present invention, in a fifth implementation manner of the ninth aspect of the present invention, the access network selection indication carries a service identifier and/or an access network identifier.

With reference to the fifth implementation manner of the ninth aspect of the present invention, in a sixth implementation manner of the ninth aspect of the present invention, the access network identifier is an access network type and/or an identifier of an access point in an access network.

With reference to the ninth aspect of the present invention, in a sixth implementation manner of the ninth aspect of the present invention, the receiving module is further configured to: receiving a command message sent by access network equipment, wherein the command message is used for instructing the UE to follow a network side command without self-decision of an access network of the UE;

the selection module is specifically configured to: and stopping network selection according to the ANDSF strategy according to the command message, and determining an access network according to the access network selection indication.

A tenth aspect of the present invention provides a user equipment, comprising:

an obtaining module, configured to obtain an access network selection policy and information of an access network device, where the access network selection policy is provided for the UE by an access network discovery and selection function ANDSF module;

and the determining module is used for determining the access network according to the access network selection strategy and the information of the access network equipment.

With reference to the tenth aspect of the present invention, in a first implementation manner of the tenth aspect of the present invention, the information of the access network device includes: load information of the access network device or access tendency of the access network device.

With reference to the first implementation manner of the tenth aspect of the present invention, in a second implementation manner of the tenth aspect of the present invention, the access tendency of the access network device includes:

the access network equipment prefers the UE to access a first network, prefers the UE to access a second network, or does not interfere with the access network selection of the UE.

With reference to the tenth aspect of the present invention, in a third implementation manner of the tenth aspect of the present invention, the access network selection policy includes: and Radio Access Technology (RAT) priority of Radio Access Bearer (RAB), and the corresponding load threshold of the access network equipment when the RAT priority takes effect.

With reference to the third implementation manner of the tenth aspect of the present invention, in a fourth implementation manner of the tenth aspect of the present invention, the determining module specifically includes:

a first determining unit, configured to determine an access network selection policy to be used according to load information of the access network device;

and the second determining unit is used for determining the access network preferentially used according to the access network selection strategy.

With reference to the first implementation manner or the second implementation manner of the tenth aspect of the present invention, in a fifth implementation manner of the tenth aspect of the present invention, the determining module is specifically configured to: and in the network which is allowed to be accessed by the access network selection strategy, selecting an access network according to the access tendency indication.

With reference to the fifth implementation manner of the tenth aspect of the present invention, in a sixth implementation manner of the tenth aspect of the present invention, the information of the access network device further includes an access factor, and the user equipment further includes:

a generation module for generating a random factor;

the comparison module is used for comparing the random factor with the access factor to obtain a comparison result;

the determining module is specifically configured to: if the comparison result accords with a preset rule, selecting an access network according to the access tendency indication; the generation module is further to: and if the comparison result does not accord with the preset rule, waiting for the preset time and then generating a new random factor again.

An eleventh aspect of the present invention provides an access network discovery and selection function ANDSF module, including:

a sending module, configured to send an access network selection policy to a user equipment UE, where the access network selection policy includes: the method comprises the steps that the RAT priority of a service wireless access technology and the load threshold of corresponding access network equipment when the RAT priority takes effect; and the access network selection strategy is used for the UE to determine the access network of the UE service according to the access network selection strategy and the load information of the access network equipment.

A twelfth aspect of the present invention provides an access network device, including:

a sending module, configured to send information of an access network device to user equipment UE, where the information of the access network device includes load information of the access network device or an access tendency of the access network device; and the information of the access network equipment is used for the UE to determine the access network of the UE service according to the information of the access network equipment and an access network selection strategy provided by an access network discovery and selection function ANDSF module.

With reference to the twelfth aspect of the present invention, in a first implementation manner of the twelfth aspect of the present invention, the information of the access network device further includes an access factor, where the access factor is used for the UE to compare the generated random factor with the access factor and obtain a comparison result, and if the comparison result meets a preset rule, the UE selects an access network according to the access tendency indication; and if the comparison result does not accord with the preset rule, the UE waits for the preset time and then generates a new random factor again.

A thirteenth aspect of the present invention provides an access network device, including:

a first processor, configured to obtain a service access policy of a user equipment UE, where the service access policy is obtained according to an access network selection policy provided by an access network discovery and selection function ANDSF module for the UE;

and the second processor is used for selecting an access network for the service of the UE according to the service access strategy.

With reference to the thirteenth aspect, in a first implementation manner of the thirteenth aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

With reference to the thirteenth aspect or the first embodiment of the thirteenth aspect, under the second embodiment of the thirteenth aspect of the present invention, the method further includes:

a third processor, configured to obtain an identifier of a radio access bearer RAB or an identifier of the UE corresponding to the service access policy;

the second processor is specifically configured to: and selecting an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the thirteenth aspect, in a third embodiment of the thirteenth aspect of the present invention, the method further includes:

a transmitter, configured to send an access indication to the UE, where the access indication carries a service identifier and/or the access network identifier.

With reference to the third implementation manner of the thirteenth aspect of the present invention, in a fourth implementation manner of the thirteenth aspect of the present invention, the access network identifier is an access network type and/or an identifier of an access point in the access network.

With reference to the third implementation manner of the thirteenth aspect of the present invention, in a fifth implementation manner of the thirteenth aspect of the present invention, the transmitter is further configured to: sending a command message to the UE instructing the UE to follow the network-side command without self-decision of its access network.

With reference to the fifth implementation manner of the thirteenth aspect of the present invention, in a sixth implementation manner of the thirteenth aspect of the present invention, the command message is specifically an indication that the network supports WLAN offload capability.

With reference to the second implementation manner of the thirteenth aspect of the present invention, in a seventh implementation manner of the thirteenth aspect of the present invention, the second processor is specifically configured to:

judging whether the load of the corresponding network exceeds a preset percentage or not according to the sequence of the RAT priority of the service from high to low; and if so, selecting the network with the highest priority as the access network of the UE.

With reference to the second embodiment of the thirteenth aspect of the present invention, in an eighth embodiment of the thirteenth aspect of the present invention, the method further includes:

a receiver, configured to receive a service access policy sent by a core network device, where the service access policy is generated by the core network according to an access network selection policy provided by the UE or the ANDSF module; or, the access policy module is configured to receive a service access policy sent by the UE, where the service access policy is generated by the UE according to an access network selection policy provided by the ANDSF module.

A fourteenth aspect of the present invention provides a core network device, including:

a first processor configured to obtain an access network selection policy provided by an access network discovery and selection function ANDSF module to a user equipment UE;

a second processor, configured to generate a service access policy for the UE according to the access network selection policy;

and the transmitter is used for transmitting the service access strategy of the UE to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy of the UE.

With reference to the fourteenth aspect of the present invention, in a first implementation manner of the fourteenth aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

With reference to the fourteenth aspect or the first implementation manner of the fourteenth aspect, in a second implementation manner of the fourteenth aspect, the transmitter is further configured to send an identifier of a radio access bearer RAB or an identifier of a UE, which corresponds to the service access policy, to the access network equipment, so that the access network equipment selects an access network for a service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the fourteenth aspect of the present invention, in a third implementation manner of the fourteenth aspect of the present invention, the second processor is specifically configured to:

determining services borne in each radio access bearer RAB of UE, determining ANDSF strategies corresponding to each service, and generating service access strategies for the UE according to the ANDSF strategies;

or determining services borne in all RABs of the UE, determining an ANDSF strategy corresponding to the services, and generating a service access strategy for the UE according to the ANDSF strategy.

With reference to the fourteenth aspect of the present invention, in a fourth embodiment of the fourteenth aspect of the present invention, the method further includes:

a receiver to receive an access network selection policy of the UE from an ANDSF module; or, the access network selection policy uploaded by the UE is obtained from the ANDSF module by the UE.

A fifteenth aspect of the present invention provides a user equipment, comprising:

a receiver, configured to receive an access network selection indication sent by an access network device;

a first processor configured to select an access network according to the access network selection indication.

With reference to the fifteenth aspect of the present invention, in the first embodiment of the fifteenth aspect of the present invention, the method further includes:

a second processor for obtaining an access network selection policy provided by an access network discovery and selection function, ANDSF, module;

a third processor, configured to generate a service access policy according to the access network selection policy;

and the transmitter is used for transmitting the generated service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy.

With reference to the first implementation manner of the fifteenth aspect of the present invention, in a second implementation manner of the fifteenth aspect of the present invention, the service access policy includes:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

With reference to the first implementation manner or the second implementation manner of the fifteenth aspect of the present invention, in a third implementation manner of the fifteenth aspect of the present invention, the first transmitter is further configured to send an identifier of a radio access bearer RAB or an identifier of a UE, which corresponds to the service access policy, to access network equipment, so that the access network equipment selects an access network for a service of the UE according to the identifier of the RAB or the identifier of the UE.

With reference to the second implementation manner of the fifteenth aspect of the present invention, in a fourth implementation manner of the fifteenth aspect of the present invention, the third processor is specifically configured to:

determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies according to the ANDSF strategies;

or determining services borne in all RABs of the UE, determining an ANDSF strategy corresponding to the services, and generating a service access strategy according to the ANDSF strategy.

With reference to the first implementation manner of the fifteenth aspect of the present invention, in a sixth implementation manner of the fifteenth aspect of the present invention, the access network selection indication carries a service identifier and/or an access network identifier.

With reference to the sixth implementation manner of the fifteenth aspect of the present invention, in a seventh implementation manner of the fifteenth aspect of the present invention, the access network identifier is an access network type and/or an identifier of an access point in the access network.

With reference to the first implementation manner of the fifteenth aspect of the present invention, in an eighth implementation manner of the fifteenth aspect of the present invention, the receiver is further configured to: receiving a command message sent by access network equipment, wherein the command message is used for instructing the UE to follow a network side command without self-decision of an access network of the UE;

the user equipment further comprises: and the fourth processor is used for stopping network selection according to the ANDSF strategy according to the command message so as to enable the first processor to determine an access network according to the access network selection instruction.

A sixteenth aspect of the present invention provides a user equipment, comprising:

a first processor, configured to obtain an access network selection policy and information of an access network device, where the access network selection policy is provided for the UE by an access network discovery and selection function ANDSF module;

and the second processor is used for determining the access network according to the access network selection strategy and the information of the access network equipment.

With reference to the sixteenth aspect of the present invention, in a first implementation manner of the sixteenth aspect of the present invention, the information of the access network device includes: load information of the access network device or access tendency of the access network device.

With reference to the first implementation manner of the sixteenth aspect of the present invention, in a second implementation manner of the sixteenth aspect of the present invention, the access tendency of the access network device includes:

With reference to the sixteenth aspect of the present invention, in a third implementation manner of the sixteenth aspect of the present invention, the access network selection policy includes: and Radio Access Technology (RAT) priority of Radio Access Bearer (RAB), and the corresponding load threshold of the access network equipment when the RAT priority takes effect.

With reference to the third implementation manner of the sixteenth aspect of the present invention, in a fourth implementation manner of the sixteenth aspect of the present invention, the second processor is specifically configured to:

determining an access network selection strategy to be used according to the load information of the access network equipment;

and determining the access network to be preferentially used according to the access network selection strategy.

With reference to the first implementation manner or the second implementation manner of the sixteenth aspect of the present invention, in a fifth implementation manner of the sixteenth aspect of the present invention, the second processor is specifically configured to:

and in the network which is allowed to be accessed by the access network selection strategy, selecting an access network according to the access tendency indication.

With reference to the fifth embodiment of the sixteenth aspect of the present invention, in the sixth embodiment of the sixteenth aspect of the present invention, the method further includes:

a third processor for generating a random factor; comparing the random factor with the access factor to obtain a comparison result;

if the comparison result meets a preset rule, the second processor selects an access network according to the access tendency indication;

and if the comparison result does not accord with the preset rule, the third processor waits for the preset time and then generates a new random factor again.

A seventeenth aspect of the present invention provides an access network discovery and selection function ANDSF module, comprising:

a transmitter, configured to transmit an access network selection policy to a user equipment UE, where the access network selection policy includes: the method comprises the steps that the RAT priority of a service wireless access technology and the load threshold of corresponding access network equipment when the RAT priority takes effect; and the access network selection strategy is used for the UE to determine the access network of the UE service according to the access network selection strategy and the load information of the access network equipment.

An eighteenth aspect of the present invention provides an access network device, including:

a transmitter, configured to send information of an access network device to user equipment UE, where the information of the access network device includes load information of the access network device or an access tendency of the access network device; and the information of the access network equipment is used for the UE to determine the access network of the UE service according to the information of the access network equipment and an access network selection strategy provided by an access network discovery and selection function ANDSF module.

With reference to the eighteenth aspect of the present invention, in a first implementation manner of the eighteenth aspect of the present invention, the information of the access network device further includes an access factor, where the access factor is used for the UE to compare the generated random factor with the access factor and obtain a comparison result, and if the comparison result meets a preset rule, the UE selects an access network according to the access tendency indication; and if the comparison result does not accord with the preset rule, the UE waits for the preset time and then generates a new random factor again.

The scheme provided by the embodiment of the invention has the beneficial effects that: when the access system controlled by the access network equipment conflicts with the policy provided by the ANDSF, the most suitable access network may be selected for the UE.

Drawings

Fig. 1 is a flowchart of a method for selecting an access network according to an embodiment of the present invention;

fig. 2 is a flowchart of a method for selecting an access network according to a second embodiment of the present invention;

fig. 3 is a flowchart of a method for selecting an access network according to a third embodiment of the present invention;

fig. 4 is another flowchart of a method for selecting an access network according to a third embodiment of the present invention;

fig. 5 is a flowchart of a method for selecting an access network according to a fourth embodiment of the present invention;

fig. 6 is a flowchart of a method for selecting an access network according to a fifth embodiment of the present invention;

fig. 7 is a flowchart of a method for selecting an access network according to a sixth embodiment of the present invention;

fig. 8 is a schematic structural diagram of an access network device according to a seventh embodiment of the present invention;

fig. 9 is a schematic structural diagram of an access network device according to a seventh embodiment of the present invention;

fig. 10 is a schematic structural diagram of a core network device according to an eighth embodiment of the present invention;

fig. 11 is a schematic structural diagram of a core network device according to an eighth embodiment of the present invention;

fig. 12 is a schematic structural diagram of a user equipment according to a ninth embodiment of the present invention;

fig. 13 is a schematic structural diagram of a user equipment according to a ninth embodiment of the present invention;

fig. 14 is a schematic structural diagram of a user equipment according to a tenth embodiment of the present invention;

fig. 15 is a schematic structural diagram of a user equipment according to a tenth embodiment of the present invention;

fig. 16 is a schematic structural diagram of an ANDSF module according to an eleventh embodiment of the present invention;

fig. 17 is a schematic structural diagram of an access network device according to a twelfth embodiment of the present invention;

fig. 18 is a schematic structural diagram of an access network device according to a thirteenth embodiment of the present invention;

fig. 19 is a schematic structural diagram of an access network device according to a thirteenth embodiment of the present invention;

fig. 20 is a schematic diagram of another structure of an access network device according to a thirteenth embodiment of the present invention;

fig. 21 is another schematic structural diagram of an access network device according to a thirteenth embodiment of the present invention;

fig. 22 is a schematic structural diagram of a core network device according to a fourteenth embodiment of the present invention;

fig. 23 is a schematic structural diagram of a core network device according to a fourteenth embodiment of the present invention;

fig. 24 is a schematic structural diagram of a user equipment according to a fifteenth embodiment of the present invention;

fig. 25 is a schematic structural diagram of a user equipment according to a fifteenth embodiment of the present invention;

fig. 26 is a schematic diagram of another structure of a ue according to a fifteenth embodiment of the present invention;

fig. 27 is a schematic structural diagram of a user equipment according to a sixteenth embodiment of the present invention;

fig. 28 is a schematic diagram of another structure of a ue according to a sixteenth embodiment of the present invention;

fig. 29 is a schematic structural diagram of an ANDSF module according to a seventeenth embodiment of the present invention;

fig. 30 is a schematic structural diagram of an access network device according to an eighteenth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a flowchart of a method for selecting an access network according to an embodiment of the present invention, as shown in fig. 1, the method includes:

101. and the access network equipment acquires a service access strategy of the UE, wherein the service access strategy of the UE is acquired according to an access network selection strategy provided for the UE by the ANDSF module.

102. And selecting an access network for the service of the UE according to the service access strategy.

It should be noted that the service Access policy may be an Access policy at a Radio Access Bearer (RAB) level, or an Access policy at a UE level. The service bearer of the UE is accessed to the network on one or more RABs, and for an access strategy at the RAB level, the identity of the RAB corresponds to the service access strategy, and for an access strategy at the UE level, the identity of the UE corresponds to the service access strategy. For the RAB level Access policy, the Radio Access Technology (RAT) priorities of the RABs may be the same or different. For the UE-level access policy, the RAT priorities of all RABs carrying UE traffic are the same. The UE-level access policy may be mainly used for networks where the UE does not support two or more (e.g. third generation partnership project (3)^rdGeneration Partner Project, abbreviated: 3GPP) and Wireless Local Area Networks (Wireless Local Area Networks, abbreviated as: WLAN)) are transmitted simultaneously, the network side cannot carry different RABs to different RAT priorities.

In one embodiment, after 101, the method may further include: acquiring an identifier of an RAB or an identifier of UE corresponding to a service access strategy; then 102 may include: and selecting an access network for the service of the UE according to the identity of the RAB or the identity of the UE.

Specifically, the service access policy may include: RAT priority of service, access point information of service permission access and/or service prohibition access; and/or, time information of service permission access and/or service prohibition access; and/or address information for services to allow access and/or disallow access. Wherein, the access policy for RAB level may include: the RAT priority of the RAB, and access point information of access permission and/or access prohibition of the RAB; and/or, time information of access permission and/or access prohibition of the RAB; and/or, address information for RAB allowed access and/or forbidden access. The access policy for the UE level may include: RAT priority of UE, access point information of UE allowing access and/or forbidding access; and/or, time information of allowing access and/or forbidding access by the UE; and/or address information that the UE is allowed to access and/or barred from accessing.

For the access policy of the RAB level, an ANDSF policy corresponding to a service may be determined according to a service carried on the RAB, and the access policy of the RAB level may be generated according to the policy and sent to the access network device, for example, assuming that an access network selection policy provided by the ANDSF module for the UE is for a service with a port number of 80, and may access the network through a 3GPP technology or a WLAN technology, and preferentially use the 3GPP technology to access the network. And the CN determines that the service with the port number of 80 is borne on the RAB with RAB ID of 1, and the access policy of the RAB level obtained according to the access network selection policy is: the RAB with RAB ID 1 accesses the network preferentially using the 3GPP technology and secondly using the WLAN technology.

For the UE-level access policy, the ANDSF policy corresponding to the service may be determined according to all services carried by the UE, and the UE-level access policy is generated according to the policy and sent to the access network device, for example, assuming that the access network selection policy provided by the ANDSF module for the UE is for a service with a port number of 80, the access network may be accessed through a 3GPP technology or a WLAN technology, and the 3GPP technology is preferentially used for accessing the network. And the CN determines that the service with the port number of 80 is borne on one or more RABs of the UE, and the service access policy of the UE obtained according to the access network selection policy is: the UE accesses the network preferentially using 3GPP technology and secondly using WLAN technology.

The access network device may obtain the service access policy of the UE in several different ways:

the first mode is as follows: and the core network equipment generates a service access strategy of the UE according to the access network selection strategy uploaded by the UE and sends the service access strategy to the access equipment.

The second way is: the core network equipment directly obtains the access network selection strategy of the UE from the ANDSF module, generates the service access strategy of the UE according to the access network selection strategy of the UE and sends the service access strategy to the access network equipment.

The third mode is as follows: and the UE acquires an access network selection strategy from the ANDSF module, accesses the network according to the access network selection strategy, configures a corresponding RAB for data transmission, generates a service access strategy of the UE according to the access network selection strategy and sends the service access strategy to the access network equipment.

Specifically, in 102, selecting an access network for the service of the UE according to the service access policy may specifically be understood as: and judging whether the load of the corresponding network exceeds a preset percentage or not according to the sequence of the RAT priority of the RAB from high to low, and if so, selecting the network with the second highest priority as the access network of the UE. For example, if the load of the network with the highest priority in the service access policy exceeds a preset percentage, the network with the second highest priority is selected as the access network of the UE; if the network load of the second highest priority exceeds a preset percentage, the network with the third highest priority is selected as the access network of the UE, and so on. It should be noted that different networks may set the same or different preset percentages, which is not described herein.

On the basis of the foregoing embodiment, after 102, the method may further include: and sending an access indication to the UE, wherein the access indication can carry a service identifier and/or an access network identifier. The service identity referred to here may be a RAB ID indicating the RAB, i.e. the service, for which the access network is operating this time. In existing networks, such as 3GPP networks and WLAN networks, if RAB IDs are not carried, there can be two understandings: one is that the UE can determine which services are accessed to the WLAN according to the ANDSF policy by itself; the second is that the UE needs to access all traffic to the WLAN, which may be because the UE does not support WLAN and 3GPP parallel transmission. The access network identifier is an identifier representing the type of the access network and/or the access point which the network indicates the UE to access. The type of the access network can be implicitly carried, that is, the type of the access network is implicitly indicated according to a specific message.

On the basis of the foregoing embodiment, before sending the access indication to the UE, the method may further include: the access network device sends a command message to the UE instructing the UE to follow the network-side command without self-decision of its access network. Specifically, all UEs may be notified in a broadcast manner, or a dedicated signaling manner may be employed for a certain UE. In the existing network, the command may specifically be a displayed instruction indicating that the UE follows the network side command, or may also be an instruction indicating that the network supports the WLAN offload function, and the UE determines that it is not possible to decide to access the WLAN network by itself according to the capability instruction.

Fig. 2 is a flowchart of a method for selecting an access network according to a second embodiment of the present invention, where the method shown in fig. 2 is different from the method shown in fig. 1 in that: fig. 1 describes the whole access network selection procedure from the access network equipment point of view, while fig. 2 describes the whole access network selection procedure from the core network equipment point of view. Although described differently in terms of the overall access network selection process shown in fig. 2 is consistent with the process shown in fig. 1. As shown in fig. 2, the method includes:

201. the core network equipment obtains an access network selection strategy provided for the UE by the ANDSF module;

202. and the core network equipment generates a service access strategy for the UE according to the access network selection strategy and sends the service access strategy of the UE to the access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy of the UE.

Specifically, the service access policy may include: RAT priority of service, access point information of service permission access and/or service prohibition access; and/or, time information of service permission access and/or service prohibition access; and/or address information for services to allow access and/or disallow access. It should be noted here that the service access policy may be an RAB-level access policy or a UE-level access policy. For an access policy at the RAB level, the identity of the RAB corresponds to the service access policy, and for an access policy at the UE level, the identity of the UE corresponds to the service access policy.

In one embodiment, the method may further include: and sending the RAB identifier corresponding to the service access strategy or the UE identifier to the access network equipment, so that the access network equipment selects an access network for the service of the UE according to the RAB identifier or the UE identifier.

On the basis of the foregoing embodiment, the generating a service access policy for the UE according to the access network selection policy mentioned in 202 may specifically include: determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies for the UE according to the ANDSF strategies; or determining services borne in all RABs of the UE, determining an ANDSF strategy corresponding to the services, and generating a service access strategy for the UE according to the ANDSF strategy.

And 201 may specifically include: the core network equipment receives an access network selection strategy of the UE from the ANDSF module; or, the core network device receives an access network selection policy uploaded by the UE, where the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module.

Fig. 3 is a flowchart of a method for selecting an access network according to a third embodiment of the present invention, where the method shown in fig. 3 is different from the method shown in fig. 1 in that: fig. 1 describes the entire access network selection procedure from the access network equipment point of view, while fig. 3 describes the entire access network selection procedure from the UE point of view. Although described differently in terms of the overall access network selection process shown in fig. 3 is consistent with the process shown in fig. 1. As shown in fig. 3, the method includes:

301. and the UE receives an access network selection indication sent by the access network equipment.

302. And the UE selects an access network according to the access network selection indication.

Under one embodiment, as the method shown in fig. 4, 301 may further include:

300. and the UE acquires the access network selection strategy provided by the ANDSF module, generates a service access strategy according to the access network selection strategy and sends the generated service access strategy to the access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy.

Under one embodiment, the method may further include: sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to the access network equipment; and the access network equipment selects an access network for the service of the UE according to the identification of the RAB or the identification of the UE.

On the basis of the foregoing embodiment, in 300, generating a service access policy according to the access network selection policy may include: determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies according to the ANDSF strategies; or determining the services borne in all RABs of the UE, determining an ANDSF strategy corresponding to the services, and generating a service access strategy according to the ANDSF strategy.

It should be noted that the access network selection indication mentioned in 301 may carry a service identifier and/or an access network identifier. The access network identifier may be an access network type and/or an identifier of an access point in the access network.

Further, the method may further include:

303. the UE receives a command message sent by the access network equipment, wherein the command message is used for instructing the UE to follow the network side command without self-decision of the access network; and stopping network selection according to the ANDSF strategy according to the command message, and determining an access network according to the access network selection indication.

It should be noted that, in the embodiment of the present invention, the occurrence order between 303 and 300 to 302 is not limited. The access network device may send command messages to the UE at any time.

Fig. 5 is a flowchart of a method for selecting an access network according to a fourth embodiment of the present invention, and as shown in fig. 5, the method includes:

501. and the UE obtains the access network selection strategy provided by the ANDSF module and the information of the access network equipment.

502. And determining the access network according to the access network selection strategy and the information of the access network equipment.

Specifically, in 501, the access network selection policy obtained by the UE may include, but is not limited to: the RAT priority of the service and the corresponding access network equipment load threshold when the RAT priority takes effect. For example, for the traffic with port number 80, when the RAN load is less than 60%, the network can be accessed through the 3GPP access technology, or the WLAN access technology, and the 3GPP access is preferentially used. For traffic with port number 80, when the RAN load is greater than 60%, the network can be accessed through 3GPP access technology, or WLAN access technology, and the WLAN access is preferentially used.

The information of the access network device may include, but is not limited to, two, one is the load of the access network device and the other is an access tendency indication of the access network device. The access tendency indication refers to which access network the access network device expects the UE to preferentially use to transmit the service, and the RAN may determine according to its own load condition and give a corresponding access tendency indication. For example, the RAN may be highly loaded and the UE may be expected to preferentially use WLAN, or the RAN may be less loaded and the UE may be expected to preferentially use 3 GPP.

The UE may obtain information of the access network device by: the RAN notifies the information of the RAN side to all the UEs through broadcast messages on a broadcast control Channel (BCCH for short); or, the RAN notifies the information of the RAN side to a specific UE through a Dedicated signaling on a Dedicated Control Channel (DCCH), where the UE refers to a UE that reports support of WLAN offloading capability.

Specifically, in 502, determining the access network according to the access network selection policy and the information of the access network device may be understood as:

if the information of the access network equipment is the load of the access network equipment, determining an available access network selection strategy according to the load of the access network equipment, and then determining an access network preferentially used according to the available access network selection strategy. For example, if the 3GPP RAN load exceeds 60%, the UE determines to use the corresponding access network selection policy according to the load information, and the policy indicates that the UE preferentially uses the WLAN at this time, so that the UE performs WLAN access. If the load of the 3GPP RAN is lower than 60%, the corresponding access network selection strategy is judged to be used according to the load information, and the strategy indicates that the UE preferentially uses the 3GPP at the moment, so that the UE cannot perform WLAN access. It should be noted that different networks may set the same or different preset percentages, which is not described herein.

If the information of the access network equipment is the access tendency indication of the access network equipment, the UE selects an access network according to the access tendency indication in the network which is allowed to be accessed by the access network selection strategy. The access tendency indication includes tendency of the UE to use WLAN, tendency of the UE to use 3GPP, or no interference with UE policy, etc.

For example, such as when the ANDSF policy prioritizes 3GPP use by the UE for traffic on port number 80, WLAN is less preferred. However, at this time, the network side access tendency indicates that the UE preferentially uses the WLAN, and then the UE preferentially attempts to access the WLAN according to the network side offload indication. If the access tendency indicates no tendency, the UE prefers to transmit the service using 3GPP, if the tendency indicates that 3GPP is preferred, even if the ANDSF indicates that 3GPP is low priority for the service.

Further, in order to prevent the UE from intensively accessing the network such as WLAN or 3GPP when the UE is instructed by the access tendency, the information of the access network device may further include an access factor. The role of the access factor is: the UE generates a random factor, and determines whether to indicate access according to the access tendency or not by comparing the random factor with the access factor. For example, the access factor is 0.7, and the random factor generated by the UE is 0.6, since 0.6<0.7, the UE accesses according to the access indication, otherwise, a new random factor is generated again after delaying for a while.

Fig. 6 is a flowchart of a method for selecting an access network according to a fifth embodiment of the present invention, where the method shown in fig. 6 is different from the method shown in fig. 5 in that: fig. 5 describes the whole access network selection procedure from the UE perspective, while fig. 6 describes the whole access network selection procedure from the ANDSF module perspective. Although described differently in terms of the overall access network selection process shown in fig. 6 is consistent with the process shown in fig. 5. As shown in fig. 6, the method includes:

601. an ANDSF module sends an access network selection strategy to UE, wherein the access network selection strategy comprises RAT priority of services and a load threshold of corresponding access network equipment when the RAT priority takes effect; the access network selection strategy is used for the UE to determine the access network of the UE service according to the access network selection strategy and the load information of the access network equipment.

Fig. 7 is a flowchart of a method for selecting an access network according to a sixth embodiment of the present invention, where the method shown in fig. 7 is different from the method shown in fig. 5 in that: fig. 5 describes the entire access network selection procedure from the UE perspective, while fig. 7 describes the entire access network selection procedure from the access network device perspective. Although described differently in terms of the overall access network selection process shown in fig. 7 is consistent with the process shown in fig. 5. As shown in fig. 7, the method includes:

701. the access network equipment receives information sent by the UE to the access network equipment, wherein the information of the access network equipment comprises load information of the access network equipment or access tendency of the access network equipment; the information of the access network equipment is used for the UE to determine the access network of the UE service according to the information of the access network equipment and the access network selection strategy provided by the ANDSF module.

Further, the information of the access network equipment also includes an access factor, the access factor is used for the UE to compare the generated random factor with the access factor and obtain a comparison result, if the comparison result accords with a preset rule, the UE selects an access network according to the access tendency indication; and if the comparison result does not accord with the preset rule, the UE waits for the preset time and then generates a new random factor again.

According to the method for selecting the access network provided by the embodiment of the invention, the service access strategy is generated for the UE according to the access network selection strategy provided by the ANDSF module, the UE can access the network according to the service access strategy, and the dynamic process can select the most appropriate access network for the UE when an access system controlled by the access network equipment conflicts with the strategy provided by the ANDSF.

Fig. 8 is a schematic structural diagram of an access network device according to a seventh embodiment of the present invention, and it should be noted that the access network device is one of the execution main bodies in the foregoing method embodiments, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 8, the access network device includes: an obtaining module 801 and a selecting module 802. The obtaining module 801 is configured to obtain a service access policy of the UE, where the service access policy is obtained according to an access network selection policy provided by an access network discovery and selection function ANDSF module for the UE; the selecting module 802 is configured to select an access network for the service of the UE according to the service access policy.

The service access strategy comprises the following steps:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

Under yet another embodiment, the obtaining module 801 is further configured to: acquiring an identifier of a Radio Access Bearer (RAB) or an identifier of User Equipment (UE) corresponding to a service access strategy; the selection module 802 is further configured to: and selecting an access network for the service of the UE according to the identity of the RAB or the identity of the UE.

In another implementation manner, as shown in fig. 9, a further structural schematic diagram of an access network device provided by the seventh embodiment of the present invention, the access network device further includes: a sending module 803, configured to send an access indication to the UE, where the access indication carries the service identifier and/or the access network identifier.

Wherein, the access network identification is the type of the access network and/or the identification of the access point in the access network.

On the basis of the embodiment shown in fig. 9, the sending module 803 is further configured to: a command message is sent to the UE instructing the UE to follow the network side command without self-decision of its access network.

Wherein the command message is specifically an indication that the network supports WLAN offload capability.

In another embodiment, the selecting module 802 is specifically configured to: judging whether the load of the corresponding network exceeds a preset percentage or not according to the sequence of the RAT priority of the service from high to low; and if so, selecting the network with the highest priority as the access network of the UE.

Under yet another implementation, the obtaining module 801 includes: the first receiving unit is used for receiving a service access strategy sent by core network equipment, wherein the service access strategy is generated by a core network according to an access network selection strategy provided by UE or an ANDSF module; or, the second receiving unit is configured to receive a service access policy sent by the UE, where the service access policy is generated by the UE according to an access network selection policy provided by the ANDSF module.

Fig. 10 is a schematic structural diagram of a core network device according to an eighth embodiment of the present invention, and it should be noted that the core network device is one of the execution main bodies in the foregoing method embodiments, and a specific work flow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 10, the core network device includes: an obtaining module 1001 and a generating module 1002. The obtaining module 1001 is configured to obtain an access network selection policy provided by an access network discovery and selection function ANDSF module to a user equipment UE; the generating module 1002 is configured to generate a service access policy for the UE according to the access network selection policy, and send the service access policy of the UE to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy of the UE.

The service access strategy comprises the following steps:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

Fig. 11 is a schematic structural diagram of a core network device according to an eighth embodiment of the present invention, further including: a sending module 1003, configured to send an identifier of a radio access bearer RAB or an identifier of the UE corresponding to the service access policy to the access network device, so that the access network device selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

In one embodiment, the generating module 1002 specifically includes: the first generation unit is used for determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies for the UE according to the ANDSF strategies; or, the second generating unit is configured to determine services carried in all RABs of the UE, determine an ANDSF policy corresponding to the service, and generate a service access policy for the UE according to the ANDSF policy.

Under yet another embodiment, the obtaining module 1001 includes: a first receiving unit, configured to receive an access network selection policy of the UE from the ANDSF module; or the second receiving unit is configured to receive the access network selection policy uploaded by the UE, where the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module.

Fig. 12 is a schematic structural diagram of a user equipment according to a ninth embodiment of the present invention, where it is to be noted that the user equipment is one of the execution main bodies in the foregoing method embodiments, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 12, the user equipment includes: a receiving module 1201 and a selecting module 1202. The receiving module 1201 is configured to receive an access network selection indication sent by an access network device; a selection module 1202 is configured to select an access network based on the access network selection indication.

In an implementation manner, as shown in fig. 13, a further structural schematic diagram of a user equipment according to a ninth embodiment of the present invention, the user equipment further includes: an obtaining module 1203, configured to obtain an access network selection policy provided by an access network discovery and selection function ANDSF module; a generating module 1204, configured to generate a service access policy according to the access network selection policy; a sending module 1205, configured to send the generated service access policy to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy.

The service access strategy comprises the following steps:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

In one embodiment, the sending module 1205 is further configured to: and sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to the access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

In another embodiment, the generating module 1204 specifically includes: the first determining unit is used for determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies according to the ANDSF strategies; or, the second determining unit is configured to determine services carried in all RABs of the UE, determine an ANDSF policy corresponding to the service, and generate a service access policy according to the ANDSF policy.

The access network selection indication carries a service identifier and/or an access network identifier.

In yet another embodiment, the receiving module 1201 is further configured to: receiving a command message sent by access network equipment, wherein the command message is used for indicating the UE to follow a network side command without self-decision of the access network; the selection module 1202 is specifically configured to: and stopping network selection according to the ANDSF strategy according to the command message, and determining an access network according to the access network selection indication.

Fig. 14 is a schematic structural diagram of a user equipment according to a tenth embodiment of the present invention, and it should be noted that the user equipment is one of the execution main bodies in the foregoing method embodiments, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 14, the user equipment includes: an obtaining module 1401 and a determining module 1402. The obtaining module 1401 is configured to obtain an access network selection policy and information of an access network device, where the access network selection policy is provided for the UE by the access network discovery and selection function ANDSF module; the determining module 1402 is configured to determine an access network according to the access network selection policy and the information of the access network device.

Wherein, the information of the access network equipment comprises: load information of the access network device or access tendency of the access network device.

Wherein the access tendency of the access network equipment comprises: the access network equipment prefers the UE to access the first network, prefers the UE to access the second network, or does not interfere with the access network selection of the UE.

The access network selection strategy comprises the following steps: and the radio access technology RAT priority of the radio access bearer RAB, and the load threshold of the corresponding access network equipment when the RAT priority takes effect.

In one embodiment, the determining module 1402 specifically includes: a first determining unit, configured to determine an access network selection policy to be used according to load information of the access network device; and the second determining unit is used for determining the access network preferentially used according to the access network selection strategy.

In another embodiment, the determining module 1402 is specifically configured to: and in the network which is allowed to be accessed by the access network selection strategy, selecting the access network according to the access tendency indication.

In another implementation, the information of the access network device further includes an access factor, as shown in fig. 15, which is a schematic structural diagram of the user equipment provided in the tenth embodiment of the present invention, and the user equipment further includes: a generating module 1403, configured to generate a random factor; a comparing module 1404, configured to compare the random factor with the access factor to obtain a comparison result; the determining module 1402 is specifically configured to: if the comparison result accords with a preset rule, selecting an access network according to the access tendency indication; the generating module 1403 is further configured to wait for a preset time and then generate a new random factor again if the comparison result does not meet the preset rule.

Fig. 16 is a schematic structural diagram of an ANDSF module according to an eleventh embodiment of the present invention, where it is to be noted that the ANDSF module is one of execution subjects in the foregoing method embodiment, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 16, the ANDSF module includes: a sending module 1601, configured to send an access network selection policy to a user equipment UE, where the access network selection policy includes: the RAT priority of the wireless access technology of the service and the load threshold of the corresponding access network equipment when the RAT priority takes effect; and the access network selection strategy is used for determining the access network of the UE service by the UE according to the access network selection strategy and the load information of the access network equipment.

Fig. 17 is a schematic structural diagram of an access network device according to a twelfth embodiment of the present invention, and it should be noted that the access network device is one of the execution main bodies in the foregoing method embodiments, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 17, the access network device includes: a sending module 1701, configured to send information of an access network device to a user equipment UE, where the information of the access network device includes load information of the access network device or an access tendency of the access network device; and the information of the access network equipment is used for the UE to determine the access network of the UE service according to the information of the access network equipment and the access network selection strategy provided by the access network discovery and selection function ANDSF module.

In one embodiment, the information of the access network device further includes an access factor, the access factor is used for the UE to compare the generated random factor with the access factor and obtain a comparison result, if the comparison result meets a preset rule, the UE selects an access network according to the access tendency indication; and if the comparison result does not accord with the preset rule, the UE waits for the preset time and then generates a new random factor again.

Fig. 18 is a schematic structural diagram of an access network device according to a thirteenth embodiment of the present invention, and it should be noted that the access network device is one of the execution main bodies in the foregoing method embodiments, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 18, the access network device includes: a first processor 1801 and a second processor 1802. The first processor 1801 is configured to obtain a service access policy of the UE, where the service access policy is obtained according to an access network selection policy provided by an access network discovery and selection function ANDSF module for the UE; a second processor 1802, configured to select an access network for a service of the UE according to the service access policy.

The service access strategy comprises the following steps:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

In another implementation manner, as shown in fig. 19, a schematic structural diagram of an access network device according to a thirteenth embodiment of the present invention further includes: a third processor 1803, configured to obtain an identity of a radio access bearer RAB or an identity of the UE corresponding to the service access policy; the second processor 1802 is specifically configured to: and selecting an access network for the service of the UE according to the identity of the RAB or the identity of the UE.

In another implementation manner, as shown in fig. 20, a further structural schematic diagram of the access network device according to a thirteenth embodiment of the present invention further includes: a transmitter 1804, configured to send an access indication to the UE, where the access indication carries the service identifier and/or the access network identifier.

Under yet another embodiment, the transmitter 1804 is further configured to: a command message is sent to the UE instructing the UE to follow the network side command without self-decision of its access network.

In one embodiment, the second processor 1802 is specifically configured to: judging whether the load of the corresponding network exceeds a preset percentage or not according to the sequence of the RAT priority of the service from high to low; and if so, selecting the network with the highest priority as the access network of the UE.

In another implementation, as shown in fig. 21, another schematic structural diagram of an access network device according to a thirteenth embodiment of the present invention further includes: a receiver 1805, configured to receive a service access policy sent by a core network device, where the service access policy is generated by a core network according to an access network selection policy provided by a UE or an ANDSF module; or, the access policy module is configured to receive a service access policy sent by the UE, where the service access policy is generated by the UE according to an access network selection policy provided by the ANDSF module.

Fig. 22 is a schematic structural diagram of core network equipment according to a fourteenth embodiment of the present invention, and it should be noted that the core network equipment is one of the execution main bodies in the foregoing method embodiment, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 22, the core network device includes: a first processor 2201 and a second processor 2202. Wherein, the first processor 2201 is configured to obtain an access network selection policy provided by the access network discovery and selection function ANDSF module to the user equipment UE; the second processor 2202 is configured to generate a service access policy for the UE according to the access network selection policy; a first transmitter 2203, configured to send the service access policy of the UE to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy of the UE.

The service access strategy comprises the following steps:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

In an implementation manner, the first transmitter 2203 is further configured to send an identifier of a radio access bearer RAB or an identifier of the UE corresponding to the service access policy to the access network device, so that the access network device selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

In another embodiment, the second processor 2202 is specifically configured to: determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies for the UE according to the ANDSF strategies; or determining services borne in all RABs of the UE, determining an ANDSF strategy corresponding to the services, and generating a service access strategy for the UE according to the ANDSF strategy.

In another implementation manner, as shown in fig. 23, a further structural schematic diagram of a core network device according to a fourteenth embodiment of the present invention, further includes: a receiver 2204 for receiving an access network selection policy of the UE from the ANDSF module; or, the access network selection policy is used for receiving the access network selection policy uploaded by the UE, and the access network selection policy uploaded by the UE is obtained from the ANDSF module for the UE.

Fig. 24 is a schematic structural diagram of a user equipment according to a fifteenth embodiment of the present invention, where it is to be noted that the user equipment is one of the execution main bodies in the foregoing method embodiments, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 24, the user equipment includes: a receiver 2401 and a first processor 2402. The receiver 2401 is configured to receive an access network selection indication sent by an access network device; the first processor 2402 is configured to select an access network based on the access network selection indication.

In an implementation manner, as shown in fig. 25, a schematic structural diagram of a user equipment according to a fifteenth embodiment of the present invention further includes: a second processor 2403, configured to obtain an access network selection policy provided by an access network discovery and selection function ANDSF module; a third processor 2404, configured to generate a service access policy according to the access network selection policy; a transmitter 2405, configured to send the generated service access policy to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy.

The service access strategy comprises the following steps:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

In another embodiment, the transmitter 2405 is further configured to send an identifier of a radio access bearer RAB or an identifier of the UE corresponding to the service access policy to the access network device, so that the access network device selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

In one embodiment, the third processor 2404 is specifically configured to: determining services borne in each radio access bearer RAB of the UE, determining ANDSF strategies corresponding to each service, and generating service access strategies according to the ANDSF strategies; or determining the services borne in all RABs of the UE, determining an ANDSF strategy corresponding to the services, and generating a service access strategy according to the ANDSF strategy.

In yet another implementation manner, as shown in fig. 26, another schematic structural diagram of the user equipment according to a fifteenth embodiment of the present invention, the receiver 2401 is further configured to receive a command message sent by the access network device, where the command message is used to instruct the UE to follow the network-side command without self-decision of its access network; a fourth processor 2406, configured to stop performing network selection according to the ANDSF policy according to the command message, so that the first processor 2402 determines an access network according to the access network selection indication.

Fig. 27 is a schematic structural diagram of a user equipment according to a sixteenth embodiment of the present invention, where it is to be noted that the user equipment is one of the execution main bodies in the foregoing method embodiments, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 27, the user equipment includes: a first processor 2701 and a second processor 2702. The first processor 2701 is configured to obtain an access network selection policy and information of an access network device, where the access network selection policy is provided by an access network discovery and selection function ANDSF module for the UE; a second processor 2702, configured to determine an access network according to the access network selection policy and the information of the access network device.

In one embodiment, the second processor 2702 is specifically configured to: determining an access network selection strategy to be used according to the load information of the access network equipment; and determining the access network to be preferentially used according to the access network selection strategy.

In another embodiment, the second processor 2702 is specifically configured to: and in the network which is allowed to be accessed by the access network selection strategy, selecting the access network according to the access tendency indication.

In another implementation manner, as shown in fig. 28, a further structural schematic diagram of a user equipment according to a sixteenth embodiment of the present invention, further includes: a third processor 2703, configured to generate a random factor; comparing the random factor with the access factor to obtain a comparison result; if the comparison result meets the preset rule, the second processor 2702 selects an access network according to the access tendency indication; if the comparison result does not conform to the preset rule, the third processor 2703 waits for a preset time and then generates a new random factor again.

Fig. 29 is a schematic structural diagram of an ANDSF module according to a seventeenth embodiment of the present invention, where it is to be noted that the ANDSF module is one of execution subjects in the foregoing method embodiment, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 29, the ANDSF module includes: the transmitter 2901 is configured to transmit an access network selection policy to the user equipment UE, the access network selection policy comprising: the RAT priority of the wireless access technology of the service and the load threshold of the corresponding access network equipment when the RAT priority takes effect; and the access network selection strategy is used for determining the access network of the UE service by the UE according to the access network selection strategy and the load information of the access network equipment.

Fig. 30 is a schematic structural diagram of an access network device according to an eighteenth embodiment of the present invention, and it should be noted that the access network device is one of the execution main bodies in the foregoing method embodiments, and a specific workflow thereof may refer to the method embodiment, which is not described herein again. As shown in fig. 30, the access network device includes: the transmitter 3001 is configured to transmit information of the access network device to the user equipment UE, where the information of the access network device includes load information of the access network device or an access tendency of the access network device; and the information of the access network equipment is used for the UE to determine the access network of the UE service according to the information of the access network equipment and the access network selection strategy provided by the access network discovery and selection function ANDSF module.

The information of the access network equipment also comprises an access factor, wherein the access factor is used for comparing the generated random factor with the access factor by the UE and obtaining a comparison result, and if the comparison result accords with a preset rule, the UE selects an access network according to an access tendency indication; and if the comparison result does not accord with the preset rule, the UE waits for the preset time and then generates a new random factor again.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for selecting an access network, comprising:

selecting an access network for the service of the UE according to the service access strategy;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

2. The method of claim 1, further comprising:

acquiring an identifier of a Radio Access Bearer (RAB) or an identifier of User Equipment (UE) corresponding to the service access strategy;

then said selecting an access network for the service of the UE according to the service access policy comprises:

and selecting an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

3. The method of claim 1, wherein after selecting an access network for the UE traffic according to the traffic access policy, the method further comprises:

and sending an access indication to the UE, wherein the access indication carries a service identifier and/or the access network identifier.

4. The method of claim 3, wherein the access network identity is an access network type and/or an identity of an access point in an access network.

5. The method of claim 3, wherein prior to the sending the access indication to the UE, the method further comprises:

the access network device sends a command message to the UE instructing the UE to follow the network-side command without self-decision of its access network.

6. The method of claim 5, wherein the command message is specifically an indication that the network supports WLAN offload capability.

7. The method of claim 2, wherein the selecting an access network for the service of the UE according to the service access policy comprises:

8. The method of claim 1, wherein the obtaining, by the access network device, the service access policy of the UE specifically comprises:

receiving a service access strategy sent by core network equipment, wherein the service access strategy is generated by the core network according to an access network selection strategy provided by the UE or the ANDSF module;

or,

and receiving a service access strategy sent by the UE, wherein the service access strategy is generated by the UE according to an access network selection strategy provided by the ANDSF module.

9. A method for selecting an access network, comprising:

generating a service access strategy for the UE according to the access network selection strategy, and sending the service access strategy of the UE to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy of the UE;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

10. The method of claim 9, further comprising:

and sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to the access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

11. The method of claim 9, wherein the generating a traffic access policy for the UE according to the access network selection policy comprises:

12. The method of claim 9, wherein the obtaining, by the core network device, the access network selection policy provided to the UE by the ANDSF module comprises:

the core network equipment receives an access network selection strategy of the UE from an ANDSF module;

or, the core network device receives an access network selection policy uploaded by the UE, where the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module.

13. A method for selecting an access network, comprising:

selecting an access network according to the access network selection indication;

before receiving the access network selection indication sent by the access network device, the method further includes:

the UE obtains an access network selection strategy provided by an Access Network Discovery and Selection Function (ANDSF) module;

generating a service access strategy according to the access network selection strategy;

sending the generated service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the service access strategy;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

14. The method of claim 13, further comprising:

and sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

15. The method of claim 13, wherein generating a service access policy according to the access network selection policy comprises:

16. The method of claim 13, wherein the access network selection indication carries a service identifier and/or an access network identifier.

17. The method of claim 16, wherein the access network identifier is an access network type and/or an identifier of an access point in an access network.

18. The method of claim 13, further comprising:

the UE receives a command message sent by access network equipment, wherein the command message is used for instructing the UE to follow a network side command without self-decision of an access network of the UE;

and stopping network selection according to the ANDSF strategy according to the command message, and determining an access network according to the access network selection indication.

19. A method for selecting an access network, comprising:

determining an access network according to an access network selection strategy and information of access network equipment;

the information of the access network device comprises: access tendency of access network equipment;

the determining the access network according to the access network selection policy and the information of the access network device includes:

selecting an access network according to the access tendency in the network which is allowed to be accessed by the access network selection strategy;

the information of the access network device further includes an access factor, and the method further includes:

generating a random factor;

selecting an access network according to the access tendency, specifically including:

if the comparison result accords with a preset rule, selecting an access network according to the access tendency;

20. The method of claim 19, wherein the access propensity of the access network device comprises:

21. The method of claim 19, wherein the access network selection policy comprises: and Radio Access Technology (RAT) priority of Radio Access Bearer (RAB), and the corresponding load threshold of the access network equipment when the RAT priority takes effect.

22. A method for selecting an access network, comprising:

an Access Network Discovery and Selection Function (ANDSF) module sends an access network selection policy to a User Equipment (UE), wherein the access network selection policy comprises: the method comprises the steps that the RAT priority of a service wireless access technology and the load threshold of corresponding access network equipment when the RAT priority takes effect; and the access network selection strategy is used for the UE to determine the access network of the UE service according to the access network selection strategy and the access tendency of the access network equipment.

23. A method for selecting an access network, comprising:

the method comprises the steps that access network equipment sends information of the access network equipment to User Equipment (UE), wherein the information of the access network equipment comprises access tendency of the access network equipment; the information of the access network equipment is used for the UE to determine the access network of the UE service according to the access tendency of the access network equipment and an access network selection strategy provided by an Access Network Discovery and Selection Function (ANDSF) module;

the information of the access network equipment also comprises an access factor, the access factor is used for comparing the generated random factor with the access factor by the UE and obtaining a comparison result, and if the comparison result accords with a preset rule, the UE selects an access network according to the access tendency; and if the comparison result does not accord with the preset rule, the UE waits for the preset time and then generates a new random factor again.

24. An access network device, comprising:

a selection module, configured to select an access network for the service of the UE according to the service access policy;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

25. The access network device of claim 24, wherein the obtaining module is further configured to: acquiring an identifier of a Radio Access Bearer (RAB) or an identifier of User Equipment (UE) corresponding to the service access strategy; the selection module is further configured to: and selecting an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

26. The access network device of claim 24, wherein the access network device further comprises: and the sending module is used for sending an access indication to the UE, wherein the access indication carries a service identifier and/or the access network identifier.

27. The access network device of claim 26, wherein the access network identification is an access network type and/or an identification of an access point in an access network.

28. The access network device of claim 26, wherein the sending module is further configured to: sending a command message to the UE instructing the UE to follow the network-side command without self-decision of its access network.

29. The access network device of claim 28, wherein the command message is specifically an indication that the network supports WLAN offload capability.

30. The access network device of claim 25, wherein the selection module is specifically configured to: judging whether the load of the corresponding network exceeds a preset percentage or not according to the sequence of the RAT priority of the service from high to low; and if so, selecting the network with the highest priority as the access network of the UE.

31. The access network device of claim 24, wherein the obtaining module comprises:

a first receiving unit, configured to receive a service access policy sent by a core network device, where the service access policy is generated by the core network according to an access network selection policy provided by the UE or the ANDSF module;

or,

and the second receiving unit is used for receiving a service access strategy sent by the UE, wherein the service access strategy is generated by the UE according to an access network selection strategy provided by the ANDSF module.

32. A core network device, comprising:

a generating module, configured to generate a service access policy for the UE according to the access network selection policy, and send the service access policy of the UE to an access network device, so that the access network device selects an access network for a service of the UE according to the service access policy of the UE;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

33. The core network device of claim 32, further comprising:

34. The core network device of claim 32, wherein the generating module specifically includes:

35. The core network device of claim 32, wherein the obtaining module comprises:

36. A User Equipment (UE), comprising:

a selection module for selecting an access network according to the access network selection indication;

the user equipment further comprises:

a sending module, configured to send the generated service access policy to an access network device, so that the access network device selects an access network for a service of the UE according to the service access policy;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

37. The ue of claim 36, wherein the sending module is further configured to: and sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

38. The ue of claim 36, wherein the generating module specifically includes:

39. The UE of claim 36, wherein the access network selection indication carries a service identifier and/or an access network identifier.

40. The UE of claim 39, wherein the access network identifier is an access network type and/or an identifier of an access point in an access network.

41. The ue of claim 36, wherein the receiving module is further configured to: receiving a command message sent by access network equipment, wherein the command message is used for instructing the UE to follow a network side command without self-decision of an access network of the UE;

42. A User Equipment (UE), comprising:

the determining module is used for determining the access network according to the access network selection strategy and the information of the access network equipment;

the determining module is specifically further configured to: selecting an access network according to the access tendency in the network which is allowed to be accessed by the access network selection strategy;

the information of the access network device further includes an access factor, and the user device further includes:

a generation module for generating a random factor;

the determining module is specifically configured to: if the comparison result accords with a preset rule, selecting an access network according to the access tendency; the generation module is further to: and if the comparison result does not accord with the preset rule, waiting for the preset time and then generating a new random factor again.

43. The UE of claim 42, wherein the access propensity of the access network device comprises:

44. The UE of claim 42, wherein the access network selection policy comprises: and Radio Access Technology (RAT) priority of Radio Access Bearer (RAB), and the corresponding load threshold of the access network equipment when the RAT priority takes effect.

45. An access network discovery and selection function, ANDSF, module comprising:

a sending module, configured to send an access network selection policy to a user equipment UE, where the access network selection policy includes: the method comprises the steps that the RAT priority of a service wireless access technology and the load threshold of corresponding access network equipment when the RAT priority takes effect; and the access network selection strategy is used for the UE to determine the access network of the UE service according to the access network selection strategy and the access tendency of the access network equipment.

46. An access network device, comprising:

a sending module, configured to send information of an access network device to user equipment UE, where the information of the access network device includes an access tendency of the access network device; the information of the access network equipment is used for the UE to determine the access network of the UE service according to the access tendency of the access network equipment and an access network selection strategy provided by an Access Network Discovery and Selection Function (ANDSF) module;

47. An access network device, comprising:

a second processor, configured to select an access network for the service of the UE according to the service access policy;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

48. The access network device of claim 47, further comprising:

49. The access network device of claim 47, further comprising:

50. The access network device of claim 49, wherein the access network identification is an access network type and/or an identification of an access point in an access network.

51. The access network device of claim 49, wherein the transmitter is further configured to:

sending a command message to the UE instructing the UE to follow the network-side command without self-decision of its access network.

52. The access network device of claim 51, wherein the command message is specifically an indication that the network supports WLAN offload capability.

53. The access network device of claim 48, wherein the second processor is specifically configured to:

54. The access network device of claim 47, further comprising:

55. A core network device, comprising:

a first transmitter, configured to send a service access policy of the UE to an access network device, so that the access network device selects an access network for a service of the UE according to the service access policy of the UE;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

56. The core network device of claim 55, further comprising:

and the second transmitter is used for transmitting the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access policy to the access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

57. The core network device of claim 55, wherein the second processor is specifically configured to:

58. The core network device of claim 55, further comprising:

59. A User Equipment (UE), comprising:

a first processor for selecting an access network in accordance with the access network selection indication;

the user equipment further comprises:

a transmitter, configured to send the generated service access policy to an access network device, so that the access network device selects an access network for a service of the UE according to the service access policy;

the service access policy comprises:

radio access technology, RAT, priority of the service;

and/or address information for services to allow access and/or disallow access.

60. The user equipment of claim 59, wherein the transmitter is further configured to: and sending the identifier of the radio access bearer RAB or the identifier of the UE corresponding to the service access strategy to access network equipment, so that the access network equipment selects an access network for the service of the UE according to the identifier of the RAB or the identifier of the UE.

61. The UE of claim 59, wherein the third processor is further configured to:

62. The UE of claim 59, wherein the indication of selection of the access network carries a service identifier and/or an access network identifier.

63. The UE of claim 62, wherein the access network identifier is an access network type and/or an identifier of an access point in an access network.

64. The UE of claim 59, wherein the receiver is further configured to: receiving a command message sent by access network equipment, wherein the command message is used for instructing the UE to follow a network side command without self-decision of an access network of the UE;

further comprising: and the fourth processor is used for stopping network selection according to the ANDSF strategy according to the command message so as to enable the first processor to determine an access network according to the access network selection instruction.

65. A user device, comprising:

the second processor is used for determining an access network according to the access network selection strategy and the information of the access network equipment;

the second processor is further specifically configured to:

if the comparison result meets a preset rule, the second processor selects an access network according to the access tendency;

66. The UE of claim 65, wherein the access propensity of the access network device comprises:

67. The UE of claim 65, wherein the access network selection policy comprises: and Radio Access Technology (RAT) priority of Radio Access Bearer (RAB), and the corresponding load threshold of the access network equipment when the RAT priority takes effect.

68. An access network discovery and selection function, ANDSF, module comprising:

a transmitter, configured to transmit an access network selection policy to a user equipment UE, where the access network selection policy includes: the method comprises the steps that the RAT priority of a service wireless access technology and the load threshold of corresponding access network equipment when the RAT priority takes effect; and the access network selection strategy is used for the UE to determine the access network of the UE service according to the access network selection strategy and the access tendency of the access network equipment.

69. An access network device, comprising:

the device comprises a transmitter and a receiver, wherein the transmitter is used for transmitting information of access network equipment to User Equipment (UE), and the information of the access network equipment comprises access tendency of the access network equipment; the information of the access network equipment is used for the UE to determine the access network of the UE service according to the access tendency of the access network equipment and an access network selection strategy provided by an Access Network Discovery and Selection Function (ANDSF) module;