WO2014114173A1 - 一种网络选择方法和装置 - Google Patents

一种网络选择方法和装置 Download PDF

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Publication number
WO2014114173A1
WO2014114173A1 PCT/CN2013/091038 CN2013091038W WO2014114173A1 WO 2014114173 A1 WO2014114173 A1 WO 2014114173A1 CN 2013091038 W CN2013091038 W CN 2013091038W WO 2014114173 A1 WO2014114173 A1 WO 2014114173A1
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Prior art keywords
network
policy
access
selection
3gpp
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PCT/CN2013/091038
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English (en)
French (fr)
Inventor
梁靖
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电信科学技术研究院
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Publication of WO2014114173A1 publication Critical patent/WO2014114173A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a network selection method and apparatus. Background of the invention
  • the Evolved Packet System is a system that supports multiple access technologies and multiple inter-access mobility.
  • the user equipment UE, User Equipment
  • the user equipment may be under the common coverage provided by multiple 3GPP, 3rd Generation Partnership Projects and/or non-3GPP access networks. These access networks may use different access technologies, may belong to different operators, or may provide access to different core networks.
  • UMTS Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • WLAN Wireless Local Area Networks
  • a network selection mechanism is currently implemented based on an Access Network Discovery and Selection Function (ANDSF) policy.
  • ANDSF Access Network Discovery and Selection Function
  • FIG. 2 the architecture of communication between the ANDSF and the UE is as shown in FIG. 2, where the UE interacts with the ANDSF through an S14 interface, which is an Internet Protocol (IP)-based interface.
  • IP Internet Protocol
  • the communication between the UE and the ANDSF has two modes: Pull and Push. The former is that the UE actively sends a request to the ANDSF. The latter is the ANDSF initiative to push information.
  • the ANDSF strategy is relatively static.
  • the ANDSF provides the UE with information related to network discovery and selection based on the operator policy, including the following three categories:
  • ISMP Inter-system mobility policy
  • EPC evolved packet core
  • Evolved packet core Access technology type
  • the ISMP may be pre-configured in the UE, or may be sent at the request of the UE, or may be pushed to the UE by the ANDSF under some trigger.
  • the ANDSF can deliver the WLAN with a higher priority than the LTE policy, so that when the UE is covered by the two, the WLAN system access is preferentially selected.
  • the ANDSF may provide the UE with a list of access networks available in its vicinity that conform to the requested access type and related parameters such as access technology, radio access network identification, carrier frequency, etc., where access technologies such as wireless local area networks ( WLAN, Wireless Local Area Network) and WiMAX.
  • access technologies such as wireless local area networks ( WLAN, Wireless Local Area Network) and WiMAX.
  • ISRP Inter-System Routing Policy
  • ISRP contains some information needed for cross-system routing.
  • IFOM IP Flow Mobility
  • MAPCON Multi-Access PDN Connectivity
  • this information can be used to determine: a) which access network is used to transmit data when certain routing conditions are met; b) for a particular IP data stream and/or specific access point name (APN, Access Point) Name), when an access network is disabled.
  • API Access Point
  • the existing protocol stipulates that the ANDSF selects the ISMP, ANDI, and ISRP provided to the UE according to the carrier's requirements and the roaming agreement.
  • the ANDSF can provide the above three policies at the same time. Only some of these strategies are available.
  • the ANDSF can interact with some databases in the carrier network, such as the Home Subscriber Server (HSS), to obtain the required information.
  • HSS Home Subscriber Server
  • the UE When the UE receives the access network information that has a higher priority than the existing access network, if the user allows, the UE should perform the high priority discovery and reselection process. When the UE automatically selects to access the network, it cannot access the EPC through the access network marked as prohibited in ISMP.
  • the prior art also proposes some network selection mechanisms based on the wireless access network, such as comprehensive consideration of the channel quality, load and geographic location of the radio access network, and then network selection.
  • Some possible way is: the UE obtains the geographical location information of the WLAN AP through the broadcast of the UMTS/LTE network, and then initiates scanning of the WLAN AP when the UE approaches the geographical location, and after the WLAN AP is discovered, the channel quality and the channel are evaluated. Whether the load is suitable for access, and then considering the channel quality and load information on the UMTS/LTE side and the WLAN side, it is decided whether to select the UMTS/LTE network or the WLAN network.
  • the network selection strategy of the access network is relatively dynamic and varies with factors such as channel quality and load information.
  • the network selection strategy of the above ANDSF and the access network may be contradictory.
  • the policy-based and radio access network-based network selection mechanism is independent, and there is no coordination mechanism between the two.
  • the UE will not know how to handle it. In addition, it may also cause the UE to frequently switch between the two networks. Summary of the invention
  • Embodiments of the present invention provide a network selection method for coordinating core network policies and access Network strategy.
  • the present invention also provides a network selection apparatus for coordinating core network policies and access network policies.
  • the embodiment of the present invention is implemented as follows:
  • a network selection method comprising:
  • the policy selection entity acquires a core network policy and an access network policy
  • the policy selection entity determines a coordination mechanism when network selection is performed by using a core network policy and an access network policy
  • the policy selection entity sends the coordination mechanism to the user equipment UE, and is used to instruct the UE to perform network selection according to the coordination mechanism.
  • a policy selection entity device comprising:
  • An obtaining module configured to acquire a core network policy and an access network policy
  • a decision module configured to determine a coordination mechanism when using a core network policy and an access network policy for network selection
  • a sending module configured to send the coordination mechanism to the user equipment UE, where the coordination mechanism is used to instruct the UE to perform network selection according to the coordination mechanism.
  • a policy selection entity device includes: a processor and a memory, wherein the memory is configured to store a coordination mechanism when network selection is performed by using a core network policy and an access network policy;
  • a processor configured to acquire a core network policy and an access network policy, and perform a coordination mechanism based on a memory storage method for adopting a core network policy and an access network policy for network selection, and determine to adopt a core network policy and an access network policy to perform network
  • the coordination mechanism is configured to send the determined coordination mechanism to the user equipment UE, where the coordination mechanism is used to instruct the UE to perform network selection according to the coordination mechanism.
  • the policy selection entity determines the adoption of the core network policy and
  • the access network policy performs a network selection mechanism, and the coordination mechanism is sent to the UE, so that the UE performs network selection according to the coordination mechanism, thereby solving the network selection problem when the core network policy and the access network policy are contradictory.
  • the UE can select a suitable network to access and receive services, which improves the effectiveness of network selection.
  • FIG. 1 is a schematic diagram of a UMTS/LTE and WLAN network coexistence scenario in the prior art
  • FIG. 2 is a schematic structural diagram of communication between an ANDSF and a UE in the prior art
  • FIG. 3 is a schematic flowchart of a method for network selection according to an embodiment of the present invention
  • 4 is a schematic diagram of a device structure of a policy selection entity according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a device structure 2 of a policy selection entity according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a method for a network selection process according to an embodiment of the present invention. As shown in the figure, the process may include:
  • Step 301 The policy selection entity acquires core network policy and access network policy information.
  • the core network policy may be an ANDSF policy, and may also include other policies, such as a hotspot2.0 policy;
  • the access network policy may include a channel quality based policy, a network load based policy, or a geographic location based policy, etc. .
  • Step 302 The policy selection entity decides a coordination mechanism when the network selection is performed by using the core network policy and the access network policy.
  • Step 303 The policy selection entity sends the determined coordination mechanism to the UE, to instruct the UE to perform network selection according to the coordination mechanism.
  • the coordination mechanism decided by the policy selection entity may include one of the following:
  • the network selection result using the core network policy is preferentially selected as the non-3GPP network access
  • the network selection result using the access network policy is to preferentially select the 3GPP network access, and the non-3GPP network access function of the UE is closed;
  • the network selection is performed according to the access network policy, and after the service ends, the network selection is performed according to the core network policy.
  • the policy selection entity may be located on the UE side, that is, integrated in the UE; the policy selection entity may also be located on the network side, for example, may exist as a separate device on the network side, or may be integrated on an existing network device, for example, integrated on the base station. .
  • the policy selection entity may use the information interaction mechanism in the UE to indicate the coordination mechanism information to the UE for performing network selection. If the policy selection entity is on the network side, such as integration At the base station, the coordination mechanism information can be directly sent to the UE through the base station. If the policy selection entity is located on the network side, the coordination mechanism information may also be first sent to other network devices, such as a base station, and then sent by the other network device to the UE.
  • This embodiment is described by taking the policy selection entity integrated into the UE as an example.
  • the specific implementation process of this embodiment is as follows.
  • the policy selection entity obtains an ANDSF policy and an access network policy, wherein the WLAN priority in the ANDSF policy is higher than the priority of the UMTS/LTE network, and the access network policy is based on a load of different radio access technologies (RATs)
  • the network is selected, that is, when the load of the WLAN network is higher than the threshold, the UE selects UMTS/LTE network access, where the load-based policy may be pre-agreed or network configured.
  • the policy selection entity analyzes the following conditions according to the obtained ANDSF policy and the access network policy: When the UE is located in the common coverage of the base station and the WLAN, and the load of the WLAN access point is higher than the threshold, the ANDSF policy is selected.
  • the network is WLAN
  • the network selected by the access network policy is UMTS/LTE, that is, the two policies conflict.
  • the policy selection entity determines the following coordination mechanism: When the UE is located in the common coverage of the base station and the WLAN, and the load of the WLAN access point is higher than the threshold, the UE turns off the WLAN module or preferentially adopts the access network policy.
  • the policy selection entity indicates the determined coordination mechanism to the UE for performing network selection and access processing, so that the relevant module for performing network selection and access processing in the UE performs network selection and access processing according to the coordination mechanism.
  • the UE finds that the load of the access point 1 is higher than a preset threshold, and therefore closes the coordination mechanism of the WLAN module as indicated by the policy selection entity.
  • Wireless fidelity in the UE (wifi, wireless Fidelity, ) module. Since the UE turns off the wifi module, the UE chooses to access the UMTS/LTE network. At this time, since only one network can work, the UE neither violates the ANDSF policy nor violates the access network policy.
  • the above embodiment is described by taking an access network policy for network selection based on different RAT-based loads, if the access network policy is based on channel quality for network selection, that is, when the channel quality of the WLAN network is low.
  • the UE selects the UMTS/LTE network access, and accordingly, the coordination mechanism determined by the policy selection entity is: the UE is located in the common coverage of the base station and the WLAN, and the channel quality of the WLAN access point is lower than the gate.
  • the UE turns off the WLAN module.
  • This embodiment is described by taking the policy selection entity as an independent network device as an example.
  • the specific implementation process of this embodiment is as follows.
  • the policy selection entity obtains the ANDSF policy and the access network policy.
  • the priority of the UMTS/LTE network in the ANDSF policy is higher than the priority of the WLAN.
  • the WLAN priority in the access network policy is higher than the UMTS/LTE network priority.
  • the access network policy is based on channel quality for network selection. That is, when the channel quality of the WLAN network is higher than the threshold, or when the channel quality of the WLAN network is higher than the threshold and the channel quality of the cell under the base station is lower than the threshold, the UE selects the WLAN access.
  • the policy selection entity analyzes the following conditions according to the obtained ANDSF policy and the access network policy:
  • the UE is located in the common coverage of the base station and the WLAN, and the channel quality of the WLAN access point is higher than the threshold, and the channel of the cell under the base station
  • the network selected by the ANDSF policy is UMTS/LTE, which is selected by the access network policy.
  • the network is WLAN, that is, the two policies conflict.
  • the policy selection entity determines the following coordination mechanism: When the UE is located in the common coverage of the base station and the WLAN, and the channel quality of the WLAN access point is higher than the threshold, and the channel quality of the cell under the base station is lower than the threshold,
  • the access policy has a higher priority than the ANDSF policy.
  • the policy selection entity sends the determined coordination mechanism to the base station, and the base station sends the coordination mechanism to the UE, so that the UE performs network selection and access processing according to the coordination mechanism.
  • the access network policy is selected.
  • the outgoing network is a WLAN
  • the network selected by the ANDSF policy is UMTS/LTE. Therefore, according to the coordination mechanism indicated by the policy selection entity, the access network policy is preferentially adopted. Therefore, the UE selects the WLAN according to the access network policy.
  • This embodiment is described by taking a policy selection entity integrated in a base station as an example.
  • the specific implementation process of this embodiment is as follows.
  • the policy selection entity obtains the ANDSF policy and the access network policy.
  • the priority of the UMTS/LTE network in the ANDSF policy is higher than the priority of the WLAN.
  • the WLAN priority in the access network policy is higher than the UMTS/LTE network priority.
  • the access network policy is based on channel quality for network selection. That is, when the channel quality of the WLAN network is higher than the threshold, or when the channel quality of the WLAN network is higher than the threshold and the channel quality of the cell under the base station is lower than the threshold, the UE selects the WLAN access.
  • the policy selection entity analyzes the following conditions according to the obtained ANDSF policy and the access network policy:
  • the UE is located in the common coverage of the base station and the WLAN, and the WLAN is connected.
  • the channel quality of the ingress point is higher than the threshold, and when the channel quality of the cell under the base station is lower than the threshold, the channel quality is adopted.
  • the network selected by the ANDSF policy is UMTS/LTE.
  • the network selected by the access network policy is WLAN, that is, the two policies conflict.
  • the policy selection entity determines the following coordination mechanism: When the UE is located in the common coverage of the base station and the WLAN, the access network policy has a higher priority than the ANDSF policy during the service, and when the service ends, the ANDSF The policy has a higher priority than the access network policy.
  • the policy selection entity sends the determined coordination mechanism to the UE, so that the UE performs network selection and access processing according to the coordination mechanism.
  • the UE When the UE is located in the common coverage of the base station and the access point 1, the UE first selects based on the access network policy. In this case, the ANDSF policy is temporarily violated. When the service ends, the network selection based on the ANDSF policy is re-established.
  • the ANDSF policy is that the UMTS/LTE priority is higher than the WLAN
  • the access network policy is based on the channel quality for network selection.
  • the channel quality of the current access point 1 is greater than a certain threshold, and the channel quality of the cell under the base station is lower than a certain The threshold is so the access network policy is that the WLAN priority is higher than UMTS/LTE.
  • the UE selects WLAN access according to the access network policy and performs service transmission. After the service ends, the UE re-selects the UMTS/LTE network access based on the ANDSF policy.
  • the policy selection entity may also perform the following processing:
  • the UE determines that the access network policy needs to be closed, the UE is notified to close the access network policy. Specifically, if the policy selection entity is located on the network side, the base station may send the indication information to the UE, where the indication information is carried in the broadcast or dedicated signaling, It is known that the UE closes the access network policy. After receiving the notification, the UE closes the access network policy and performs network selection only according to the ANDSF policy.
  • the policy selection entity if the policy selection entity is located on the UE side, the policy selection entity indicates the determined decision result of the closed access network policy to the relevant module in the UE for network selection and access processing, so as to be performed in the UE.
  • the relevant module of network selection and access processing closes the access network policy and performs network selection only according to the ANDSF policy.
  • the policy selection entity notifies the UE to open the access network policy when determining that the access network policy needs to be enabled. Specifically, if the policy selection entity is located on the network side, the base station may send the indication information to the UE by using the base station, where the indication information is sent in the broadcast or dedicated signaling, to notify the UE to open the access network policy. After receiving the notification, the UE starts the access network policy. After the UE is enabled to access the network policy, when located in the coverage of the base station and the WLAN, the UE may perform network selection according to a coordination mechanism sent by the policy selection entity. If the policy selection entity is located on the network side, the base station may send the indication information to the UE by using the base station, where the indication information is sent in the broadcast or dedicated signaling, to notify the UE to open the access network policy. After receiving the notification, the UE starts the access network policy. After the UE is enabled to access the network policy, when located in the coverage of the base station and the WLAN, the UE may perform network selection according to a coordination
  • the policy selection entity On the UE side, the policy selection entity indicates the determined decision result of the open access network policy to the relevant module in the UE for network selection and access processing, so that the relevant module for performing network selection and access processing in the UE is connected. Network access strategy. After the UE is enabled to access the network policy, when it is located within the coverage of the base station and the WLAN, the UE may perform network selection according to the coordination mechanism sent by the policy selection entity.
  • the foregoing embodiments of the present invention can solve the problem of network selection when the ANDSF policy and the access network policy conflict, so that the UE can select an appropriate network to access and receive the service, thereby improving the validity of the network selection and the user experience.
  • an embodiment of the present invention further provides a policy selection entity device.
  • FIG. 4 is a schematic structural diagram of a policy selection entity device 1 according to an embodiment of the present invention.
  • the device may be integrated into a UE, or may be integrated into a network side device, or may be an independent network device.
  • the device may include: an obtaining module 41, a decision module 42 and a sending module 43, among them:
  • the obtaining module 41 is configured to acquire a core network policy and an access network policy
  • the decision module 42 is configured to determine a coordination mechanism when the core network policy and the access network policy are used for network selection;
  • the sending module 43 is configured to send the coordination mechanism to the UE, where the coordination mechanism is used to instruct the UE to perform network selection according to the coordination mechanism.
  • the coordination mechanism decided by the decision module 42 is specifically: when the network selection result using the core network policy is preferentially selecting non-3GPP network access, and the network selection result using the access network policy is preferentially selecting the 3GPP network access, The non-3GPP network access function of the UE is closed or the network selection is performed according to the access network policy.
  • the coordination mechanism decided by the decision module 42 is specifically: when the network selection result using the core network policy is preferentially selected as the 3GPP network access, When the network selection result of the access network policy is that the non-3GPP network network access is preferentially selected, the network selection is performed according to the access network policy.
  • the access network policy is to select a network access according to the load or channel quality of the 3GPP network and the non-3GPP network; the coordination mechanism of the non-3GPP network access function that is determined by the decision module 42 to be closed is specifically: when the UE is located When the 3GPP network base station and the non-3GPP network access point have a common coverage, and the load of the non-3GPP network is higher than a set threshold or the channel quality is lower than a set threshold, the non-3GPP network access function is turned off.
  • the access network policy is to select network access according to the load or channel quality of the 3GPP network and the non-3GPP network; the coordination mechanism determined by the decision module 42 to perform network selection according to the access network policy is specifically: when the UE is located in the 3GPP network base station And the non-3GPP network access point co-covering, and when the load of the non-3GPP network is lower than the set threshold, the network selection is performed according to the access network policy; or, when the UE is located at the 3GPP network base station and the non-3GPP network access point Within the coverage, when the channel quality of the non-3GPP network is higher than the set threshold, the network selection is performed according to the access network policy; or, when the UE is located at the 3GPP network base station and the non- When the channel quality of the 3GPP network access point is within the common coverage, and the channel quality of the non-3GPP network is higher than the set threshold, and the channel quality of the 3GPP network is lower than the set threshold, the network selection is performed according to the access network policy.
  • the coordination mechanism may also be: when the UE is located in the common coverage of the 3GPP network base station and the non-3GPP network access point, during the service progress, the network selection is performed according to the access network policy, and after the service ends, according to the core network
  • the strategy makes network selection.
  • the decision module 42 is further configured to: after the sending module 43 sends the coordination mechanism to the UE, send, by the sending module 43, an indication of the policy of closing the access network to the UE, to indicate that the UE performs network selection according to the core network policy. .
  • the decision module 42 is further configured to: after the sending module 43 sends an indication to the UE to disable the access network policy, the sending module 43 sends an indication to the UE to enable the access network policy, to indicate that the UE is configured according to the Coordination mechanism for network selection.
  • the policy selection entity device may be integrated on the UE, or the policy selection entity device is located on the network side.
  • the sending module 43 in the device uses the information interaction mechanism inside the UE to send the coordination mechanism to the function module for network selection in the UE.
  • the transmitting module 43 in the device transmits the coordination mechanism to the UE with or without the intermediate device.
  • FIG. 5 is a schematic structural diagram of a policy selection entity device according to an embodiment of the present invention, including: a processor and a memory, where the memory is used to store Coordination mechanism for network selection using core network policy and access network policy; processor for acquiring core network policy and access network policy, based on memory storage when using core network policy and access network policy for network selection a coordination mechanism for determining a coordination mechanism when the core network policy and the access network policy are used for network selection, and transmitting the determined coordination mechanism to the user equipment UE, where the coordination mechanism is used Instructing the UE to perform network selection according to the coordination mechanism.
  • the determining a coordination mechanism when using a core network policy and an access network policy for network selection is:
  • the non-3GPP network access function of the UE is disabled or according to the access network.
  • the network selection result using the core network policy is to preferentially select the 3GPP network access
  • the network selection result using the access network policy is to preferentially select the non-3GPP network network access
  • the network selection is performed according to the access network policy
  • the network selection is performed according to the access network policy during the service process, and after the service ends, the network selection is performed according to the core network policy.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a
  • the UE device (which may be a cell phone, a personal computer, a server, or a network device, etc.) performs the methods described in various embodiments of the present invention.

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Abstract

本发明公开了一种网络选择方法和装置。该方法包括：策略选择实体获取核心网策略和接入网策略；所述策略选择实体确定在采用核心网策略和接入网策略进行网络选择时的协调机制；所述策略选择实体将所述协调机制发送给UE，以指示所述UE根据所述协调机制进行网络选择。本发明可解决ANDSF策略和接入网策略矛盾时的网络选择问题，使UE可以选择合适的网络进行接入并接收服务，提高了网络选择的有效性以及用户体验。

Description

一种网络选择方法和装置
技术领域
本发明涉及无线通信领域， 特别涉及一种网络选择方法和装置。 发明背景
演进的分组系统（ EPS, Evolved Packet System )是一个支持多种接 入技术和多种接入间移动性的系统。 在多接入场景下， 用户设备（UE, User Equipment ) 可能处于多个第三代合作伙伴计划 （ 3GPP , 3rd Generation Partnership Project )和 /或非 3GPP接入网给的共同覆盖下。这 些接入网络可能使用不同的接入技术， 可能属于不同的运营商， 也可能 提供到不同核心网的接入。
通用移动通信系统 ( UMTS , Universal Mobile Telecommunications System ) /长期演进（ LTE , Long Term Evolution )和无线局域网 （ WLAN , Wireless Local Area Networks )网络共存场景如图 1所示， 在 UMTS/LTE 的基站。诸如 UMTS中的 Node B或 LTE中的 eNB的覆盖范围内，存在 多个 WLAN的接入点 （AP, Access Point )。 接入点的覆盖范围相对基 站来说比较小。 其中 UMTS/LTE为 3GPP网络， 而 WLAN为非 3GPP 网络。
基于上述网络场景和架构， 目前有一种网络选择机制是基于接入网 络发现和选择功能实体（ ANDSF, Access Network Discovery and Selection Function )策略来实现的。 具体地， ANDSF与 UE之间通信的架构如图 2所示， 其中， UE与 ANDSF通过 S14接口交互， 该接口是一个基于因 特网协议（IP, Internet Protocol ) 的接口。 UE与 ANDSF之间的通信有 拉（ Pull )和推（ Push )两种模式， 前者是 UE主动向 ANDSF发送请求， 后者是 ANDSF主动推送信息。 ANDSF策略是比较静态的。
ANDSF基于运营商策略向 UE提供网络发现和选择相关的信息，包 括以下三类：
( 1 )跨系统的移动性策略（ ISMP, Inter-system mobility policy ) ISMP是一系列运营商定义的规则和偏好信息， 该策略定义了是否 允许跨系统移动、 最适合接入演进的分组核心 （EPC, Evolved packet core )的接入技术类型、 不同接入技术的不同优先级等信息。 ISMP可以 在 UE中预配，也可以在 UE请求时发送，或由 ANDSF在某种触发下推 送给 UE。 例如， ANDSF可以下发 WLAN的优先级高于 LTE的策略， 这样， 当 UE在二者覆盖下时， 会优先选择 WLAN系统接入。
( 2 ) 接入网络发现信息 （ ANDI , Access Network Discovery Information )
ANDSF可以为 UE提供在其附近可用的、符合所请求的接入类型的 接入网络列表以及相关参数， 如接入技术， 无线接入网络标识、 载波频 率等，其中接入技术如无线局域网（ WLAN , Wireless Local Area Network ) 和 WiMAX等、。
( 3 )跨系统路由策略（ ISRP, Inter-System Routing Policy )
ISRP包含一些跨系统路由所需的信息，对于具有多无线接入接口的 UE, 如支持 IP流移动性（ IFOM, IP Flow Mobility, )或多接入 PDN连 接 ( MAPCON, Multi Access PDN Connectivity ) 的 UE, 这些信息可以 用于决定： a) 当满足特定路由条件时， 使用何种可用的接入网络来发送 数据； b)对于特定 IP数据流和 /或特定接入点名称（ APN, Access Point Name ) 而言， 某种接入网络何时被禁用。
现有协议规定， ANDSF根据运营商要求和漫游协议选择提供给 UE 的 ISMP、 ANDI和 ISRP, ANDSF可以同时提供上述三种策略， 也可以 仅提供其中的部分策略。 ANDSF可以与运营商网络中的一些数据库交 互， 如归属用户服务器（ HSS , Home Subscriber Server ), 以获取所需的 信息。
当 UE接收到可用的优先级高于现有接入网络的接入网络信息， 如 果用户允许， 则 UE应当执行到该高优先级的发现和重选过程。 当 UE 自动选择接入网络时， 不能通过在 ISMP中被标记为禁止的接入网络接 入到 EPC。
除了基于策略的网络选择机制之外， 现有技术还提出了一些基于无 线接入网的网络选择机制， 例如综合考虑无线接入网的信道质量、 负载 和地理位置等信息， 然后进行网络选择。 一种可能的方式为： UE通过 UMTS/LTE网络的广播获取 WLAN AP的地理位置信息， 然后当 UE接 近该地理位置时， 启动对 WLAN AP的扫描， 当发现 WLAN AP之后， 评估其信道质量和负载是否适合接入， 之后综合考虑 UMTS/LTE侧和 WLAN 侧的信道质量和负载信息后， 判决选择 UMTS/LTE 网络还是 WLAN网络。接入网的网络选择策略是比较动态的， 会随着如信道质量 和负载信息等进行变化。
当 UE同时处于 UMTS/LTE网络和 WLAN的覆盖范围下时， 上述 ANDSF和接入网的网络选择策略将有可能发生矛盾。
现有技术中， 基于策略的和基于无线接入网的网络选择机制是独立 进行的， 二者之间没有协调机制。 当二者所形成的网络选择结论相矛盾 时， UE将不知道该如何处理， 另外， 也有可能造成 UE在二种网络之间 频繁切换。 发明内容
本发明实施例提供一种网络选择方法， 用以协调核心网策略和接入 网策略。
本发明还提供一种网络选择装置， 用以协调核心网策略和接入网策 略。
根据上述目的， 本发明实施例是这样实现的：
一种网络选择方法， 该方法包括：
策略选择实体获取核心网策略和接入网策略；
所述策略选择实体确定在采用核心网策略和接入网策略进行网络 选择时的协调机制；
所述策略选择实体将所述协调机制发送给用户设备 UE, 用于指示 所述 UE根据所述协调机制进行网络选择。
一种策略选择实体装置， 包括：
获取模块， 用于获取核心网策略和接入网策略；
决策模块， 用于确定在采用核心网策略和接入网策略进行网络选择 时的协调机制；
发送模块， 用于将所述协调机制发送给用户设备 UE, 所述协调机 制用于指示所述 UE根据所述协调机制进行网络选择。
一种策略选择实体装置， 包括： 处理器及存储器， 其中， 存储器， 用于存储在采用核心网策略和接入网策略进行网络选择时 的协调机制；
处理器， 用于获取核心网策略和接入网策略， 基于存储器存储的在 采用核心网策略和接入网策略进行网络选择时的协调机制， 确定在采用 核心网策略和接入网策略进行网络选择时的协调机制， 将所确定的协调 机制机制发送给用户设备 UE,所述协调机制用于指示所述 UE根据所述 协调机制进行网络选择。
本发明的上述实施例， 通过策略选择实体来确定采用核心网策略和 接入网策略进行网络选择时的协调机制， 并将该协调机制发送给 UE, 以使 UE根据该协调机制进行网络选择， 从而解决了核心网策略和接入 网策略矛盾时的网络选择问题， 使 UE可以选择合适的网络进行接入并 接收服务， 提高了网络选择的有效性。 附图简要说明
为了更清楚地说明本发明的技术方案， 下面将对实施例描述中所需 要使用的附图作筒单地介绍， 显而易见地， 下面描述中的附图仅仅是本 发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳 动的前提下， 还可以根据这些附图获得其他的附图。
图 1为现有技术中 UMTS/LTE和 WLAN网络共存场景示意图； 图 2为现有技术中 ANDSF与 UE之间通信的架构示意图； 图 3为本发明实施例提供的网络选择的方法流程示意图； 图 4为本发明实施例提供的策略选择实体的装置结构一示意图； 图 5为本发明实施例提供的策略选择实体的装置结构二示意图。 实施本发明的方式
下面将结合本发明中的附图， 对本发明中的技术方案进行清楚、 完 整地描述， 显然， 所描述的实施例仅仅是本发明的一部分实施例， 而不 是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有 做出创造性劳动前提下所获得的所有其他实施例， 都属于本发明保护的 范围。
参见图 3, 为本发明实施例提供的网络选择流程的方法示意图， 如 图所示， 该流程可包括：
步骤 301、 策略选择实体获取核心网策略和接入网策略信息。 在该步骤中， 核心网策略可以为 ANDSF策略， 还可以包含其他策 略， 比如 hotspot2.0策略； 接入网策略可以包括基于信道质量的策略、 基于网络负荷的策略或基于地理位置的策略等等。
步骤 302、 策略选择实体决策出在采用核心网策略和接入网策略进 行网络选择时的协调机制。
步骤 303、 策略选择实体将决策出的协调机制发送给 UE, 以指示 UE按照该协调机制进行网络选择。
策略选择实体所决策出的协调机制， 可以包括以下之一：
( 1 )当采用核心网策略的网络选择结果为优先选择非 3GPP网络接 入， 采用接入网策略的网络选择结果为优先选择 3GPP网络接入时， 关 闭 UE的非 3GPP网络接入功能；
( 2 )当采用核心网策略的网络选择结果为优先选择非 3GPP网络接 入， 采用接入网策略的网络选择结果为优先选择 3GPP网络接入时， 优 先采用接入网策略进行网络选择；
( 3 ) 当采用核心网策略的网络选择结果为优先选择 3GPP 网络接 入， 采用接入网策略的网络选择结果为优先选择非 3GPP网络网络接入 时， 优先采用接入网策略进行网络选择；
( 4 )在 UE进行业务的过程中， 根据接入网策略进行网络选择， 在 业务结束后， 根据核心网策略进行网络选择。
策略选择实体可以位于 UE侧， 即集成于 UE; 策略选择实体也可以 位于网络侧， 比如， 可以作为独立的设备存在于网络侧， 也可以集成在 现有的网络设备上， 比如集成在基站上。
如果策略选择实体集成于 UE, 则上述流程中的步骤 303 中， 策略 选择实体可采用 UE 内部的信息交互机制， 将协调机制信息指示给 UE 中进行网络选择的功能模块。 如果策略选择实体位于网络侧， 比如集成 在基站上， 则可以将协调机制信息直接通过基站发送给 UE。 如果策略 选择实体位于网络侧， 则还可以先将协调机制信息发送给其它网络设备 比如基站， 再由该其它网络设备发送给 UE。
下面结合具体应用场景对本发明实施例进行详细描述。
实施例一
本实施例以策略选择实体集成于 UE为例描述， 该实施例的具体实 现过程如下所述。
策略选择实体获取 ANDSF策略和接入网策略， 其中， ANDSF策略 中 WLAN优先级高于 UMTS/LTE网络的优先级， 接入网策略为基于不 同无线接入技术（ RAT,Radio Access Technology ) 的负荷进行网络选择， 即当 WLAN网络的负荷高于门限时， UE选择 UMTS/LTE网络接入，其 中基于负荷的策略可以是预先约定的， 也可以是网络配置的。
策略选择实体根据获取到的 ANDSF策略和接入网策略， 分析出存 在以下情况： 在 UE位于基站和 WLAN共同覆盖范围内， 且 WLAN接 入点的负荷高于门限时， 采用 ANDSF策略所选择出的网络为 WLAN, 采用接入网策略所选择出的网络为 UMTS/LTE, 即两种策略发生沖突。 为避免上述沖突， 策略选择实体确定出以下协调机制： 在 UE位于基站 和 WLAN共同覆盖范围内， 且 WLAN接入点的负荷高于门限时， UE 关闭 WLAN模块或优先采用接入网策略。 策略选择实体将确定出的协 调机制指示给 UE中进行网络选择与接入处理的相关模块， 以使 UE中 进行网络选择与接入处理的相关模块根据该协调机制进行网络选择与 接入处理。
例如， 当 UE位于基站和接入点 1的共同覆盖范围时， 该 UE发现 接入点 1的负荷高于预先设定的门限， 因此根据策略选择实体所指示的 关闭 WLAN模块的协调机制， 关闭 UE 中的无线保真 （wifi, wireless fidelity, )模块。由于 UE关闭了 wifi模块，所以 UE选择接入 UMTS/LTE 网络。 此时因为只有一个网络可以工作， 因此 UE既没有违反 ANDSF 策略， 也没有违反接入网策略。
需要说明的是， 虽然上述实施例是以策略选择实体集成于 UE为例 描述的， 但针对策略选择实体位于网络侧的情况， 依然可采用上述实施 例的实现原理。
还需要说明的是，上述实施例是以接入网策略为基于不同 RAT的负 荷进行网络选择为例描述的， 如果接入网策略为基于信道质量进行网络 选择， 即当 WLAN网络的信道质量低于门限时， UE选择 UMTS/LTE网 络接入， 则相应地， 策略选择实体所决策出的协调机制为： 在 UE位于 基站和 WLAN共同覆盖范围内， 且 WLAN接入点的信道质量低于门限 时， UE关闭 WLAN模块。
实施例二
本实施例以策略选择实体为独立的网络设备为例描述， 该实施例的 具体实现过程如下所述。
策略选择实体获取 ANDSF策略和接入网策略。 其中， ANDSF策略 中 UMTS/LTE网络优先级高于 WLAN的优先级， 接入网策略中 WLAN 优先级高于 UMTS/LTE网络优先级， 具体地，接入网策略为基于信道质 量进行网络选择， 即当 WLAN 网络的信道质量高于门限时， 或者当 WLAN网络的信道质量高于门限而基站下小区的信道质量低于门限时， UE选择 WLAN接入。
策略选择实体根据获取到的 ANDSF策略和接入网策略， 分析出存 在以下情况： 在 UE位于基站和 WLAN共同覆盖范围内， 且 WLAN接 入点的信道质量高于门限， 而基站下小区的信道质量低于门限时， 采用 ANDSF策略所选择出的网络为 UMTS/LTE, 采用接入网策略所选择出 的网络为 WLAN, 即两种策略发生沖突。 为避免上述沖突， 策略选择实 体确定出以下协调机制： 在 UE位于基站和 WLAN共同覆盖范围内， 且 WLAN接入点的信道质量高于门限，而基站下小区的信道质量低于门限 时， 接入网策略的优先级高于 ANDSF策略。 策略选择实体将确定出的 协调机制发送给基站， 由基站将该协调机制发送给 UE, 以使 UE根据该 协调机制进行网络选择与接入处理。
例如， 当 UE位于基站和接入点 1的共同覆盖范围时， 当前接入点 1 的信道质量大于某个门限， 而基站下小区的信道质量低于某个门限， 采用接入网策略所选择出的网络为 WLAN , 而采用 ANDSF策略所选择 出的网络为 UMTS/LTE, 因此根据策略选择实体所指示的协调机制， 优 先采用接入网策略， 因此， UE按照接入网策略选择 WLAN进行接入。
需要说明的是， 虽然上述实施例是以策略选择实体为独立网络设备 为例描述的， 但针对策略选择实体集成于现有网络设备。 如基站或者位 于 UE侧的情况， 依然可采用上述实施例的实现原理。
实施例三
本实施例以策略选择实体集成于基站为例描述， 该实施例的具体实 现过程如下所述。
策略选择实体获取 ANDSF策略和接入网策略。 其中， ANDSF策略 中 UMTS/LTE网络优先级高于 WLAN的优先级， 接入网策略中 WLAN 优先级高于 UMTS/LTE网络优先级， 具体地，接入网策略为基于信道质 量进行网络选择， 即当 WLAN 网络的信道质量高于门限时， 或者当 WLAN网络的信道质量高于门限而基站下小区的信道质量低于门限时， UE选择 WLAN接入。
策略选择实体根据获取到的 ANDSF策略和接入网策略， 分析出存 在以下情况： 在 UE位于基站和 WLAN共同覆盖范围内， 且 WLAN接 入点的信道质量高于门限， 而基站下小区的信道质量低于门限时， 采用
ANDSF策略所选择出的网络为 UMTS/LTE, 采用接入网策略所选择出 的网络为 WLAN, 即两种策略发生沖突。 为避免上述沖突， 策略选择实 体确定出以下协调机制： 当 UE位于基站和 WLAN共同覆盖范围内时， 在业务进行过程中， 接入网策略的优先级高于 ANDSF策略， 当业务结 束后， ANDSF 策略的优先级高于接入网策略。 策略选择实体将确定出 的协调机制发送给 UE,以使 UE根据该协调机制进行网络选择与接入处 理。
当 UE位于基站和接入点 1的共同覆盖范围时， 首先基于接入网策 略进行选择， 在该情况下暂时违反 ANDSF策略， 当业务结束时， 将重 新基于 ANDSF策略进行网络选择。 例如， ANDSF策略是 UMTS/LTE 优先级高于 WLAN, 而接入网策略是基于信道质量进行网络选择， 当前 接入点 1的信道质量大于某个门限， 而基站下小区的信道质量低于某个 门限，所以接入网策略是 WLAN优先级高于 UMTS/LTE。此时 UE按照 接入网策略选择 WLAN接入并进行业务传输。 当业务结束后， UE重新 基于 ANDSF策略， 选择 UMTS/LTE网络接入。
需要说明的是， 虽然上述实施例是以策略选择实体集成于基站为例 描述的， 但针对策略选择实体集成于其它网络设备或者为独立网络设 备， 或者策略选择实体位于 UE侧的情况， 依然可采用上述实施例的实 现原理。
实施例四
在上述各实施例的基础上， 策略选择实体还可以进行如下处理： 策略选择实体判决目前需要关闭接入网策略时， 通知 UE关闭接入 网策略。 具体地， 如果策略选择实体位于网络侧， 则可以通过基站向 UE发送指示信息， 该指示信息携带在广播或者专用信令中发送， 以通 知 UE关闭接入网策略。 UE在收到该通知后关闭接入网策略， 仅根据 ANDSF策略进行网络选择。
在该实施例中， 如果策略选择实体位于 UE侧， 则策略选择实体将 确定出的关闭接入网策略的决策结果指示给 UE中进行网络选择与接入 处理的相关模块， 以使 UE中进行网络选择与接入处理的相关模块关闭 接入网策略， 仅根据 ANDSF策略进行网络选择。
进一步地， 策略选择实体在判决目前需要开启接入网策略时， 通知 UE 开启接入网策略。 具体地， 如果策略选择实体位于网络侧， 则可以 通过基站向 UE发送指示信息， 该指示信息携带在广播或者专用信令中 发送，以通知 UE开启接入网策略。 UE在收到该通知后开启接入网策略。 UE在开启接入网策略后， 当位于基站和 WLAN覆盖范围内时， 可根据 策略选择实体发送的协调机制进行网络选择。 如果策略选择实体位于
UE侧， 则策略选择实体将确定出的开启接入网策略的决策结果指示给 UE中进行网络选择与接入处理的相关模块，以使 UE中进行网络选择与 接入处理的相关模块开启接入网策略。 UE在开启接入网策略后， 当位 于基站和 WLAN覆盖范围内时， 可根据策略选择实体发送的协调机制 进行网络选择。
本发明的上述各实施例， 可以解决 ANDSF策略和接入网策略矛盾 时的网络选择问题， 使 UE可以选择合适的网络进行接入并接收服务， 提高了网络选择的有效性以及用户体验。
基于相同的技术构思， 本发明实施例还提供了一种策略选择实体装 置。
参见图 4, 为本发明实施例提供的策略选择实体装置一的结构示意 图， 该装置可集成于 UE, 也可集成于网络侧设备， 还可以是独立的网 络设备。 该装置可包括： 获取模块 41、 决策模块 42以及发送模块 43, 其中：
获取模块 41 , 用于获取核心网策略和接入网策略；
决策模块 42,用于确定在采用核心网策略和接入网策略进行网络选 择时的协调机制；
发送模块 43 , 用于将所述协调机制发送给 UE, 所述协调机制用于 指示所述 UE根据所述协调机制进行网络选择。
具体地， 决策模块 42 决策出的协调机制具体为： 当采用核心网策 略的网络选择结果为优先选择非 3GPP网络接入， 采用接入网策略的网 络选择结果为优先选择 3GPP网络接入时， 关闭 UE的非 3GPP网络接 入功能或根据接入网策略进行网络选择； 或者， 决策模块 42 决策出的 协调机制具体为： 当采用核心网策略的网络选择结果为优先选择 3GPP 网络接入， 采用接入网策略的网络选择结果为优先选择非 3GPP网络网 络接入时， 根据接入网策略进行网络选择。
其中， 所述接入网策略为根据 3GPP网络和非 3GPP网络的负荷或 信道质量选择网络接入； 决策模块 42决策出的关闭 UE的非 3GPP网络 接入功能的协调机制具体为： 当 UE位于 3GPP网络基站和非 3GPP网 络接入点共同覆盖范围内， 且非 3GPP网络的负荷高于设定阈值或信道 质量低于设定阈值时， 关闭非 3GPP网络接入功能。
所述接入网策略为根据 3GPP网络和非 3GPP网络的负荷或信道质 量选择网络接入； 决策模块 42 决策出的根据接入网策略进行网络选择 的协调机制具体为： 当 UE位于 3GPP网络基站和非 3GPP网络接入点 共同覆盖范围内， 且非 3GPP网络的负荷低于设定阈值时， 根据接入网 策略进行网络选择； 或者， 当 UE位于 3GPP网络基站和非 3GPP网络 接入点共同覆盖范围内， 且非 3GPP网络的信道质量高于设定阈值时， 根据接入网策略进行网络选择； 或者， 当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内，且非 3GPP网络的信道质量高于设定 阈值、 3GPP 网络的信道质量低于设定阈值时， 根据接入网策略进行网 络选择。
所述协调机制还可以是： 当 UE位于 3GPP网络基站和非 3GPP网 络接入点共同覆盖范围内时， 在业务进行过程中， 根据接入网策略进行 网络选择， 在业务结束后， 根据核心网策略进行网络选择。
进一步地， 决策模块 42还用于， 在发送模块 43将所述协调机制发 送给 UE之后， 通过发送模块 43向 UE发送关闭接入网策略的指示， 用 于指示 UE根据核心网策略进行网络选择。
进一步地， 决策模块 42还用于， 在发送模块 43向 UE发送关闭接 入网策略的指示之后，通过发送模块 43向 UE发送开启接入网策略的指 示， 用于指示所述 UE根据所述协调机制进行网络选择。
进一步地， 该策略选择实体装置可集成于 UE上， 或者所述策略选 择实体装置位于网络侧。 当策略选择实体装置位于 UE上时， 该装置中 的发送模块 43采用 UE 内部的信息交互机制， 将所述协调机制发送给 UE 内进行网络选择的功能模块。 当策略选择实体装置位于网络侧时， 该装置中的发送模块 43 将所述协调机制通过或不通过中间设备发送给 UE。
本发明还公开了一种策略选择实体装置， 如图 5所示， 图 5为本发 明实施例提供的策略选择实体装置二结构示意图， 包括： 处理器及存储 器， 其中， 存储器， 用于存储在采用核心网策略和接入网策略进行网络 选择时的协调机制； 处理器， 用于获取核心网策略和接入网策略， 基于 存储器存储的在采用核心网策略和接入网策略进行网络选择时的协调 机制， 确定在采用核心网策略和接入网策略进行网络选择时的协调机 制， 将所确定的协调机制机制发送给用户设备 UE, 所述协调机制用于 指示所述 UE根据所述协调机制进行网络选择。
在该装置中， 所述确定在采用核心网策略和接入网策略进行网络选 择时的协调机制为：
当采用核心网策略的网络选择结果为优先选择非 3GPP网络接入， 采用接入网策略的网络选择结果为优先选择 3GPP网络接入时，关闭 UE 的非 3GPP网络接入功能或根据接入网策略进行网络选择； 或者，
当采用核心网策略的网络选择结果为优先选择 3GPP网络接入， 采 用接入网策略的网络选择结果为优先选择非 3GPP网络网络接入时， 根 据接入网策略进行网络选择； 或者
当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内 时， 在业务进行过程中，根据接入网策略进行网络选择， 在业务结束后， 根据核心网策略进行网络选择。
通过以上的实施方式的描述， 本领域的技术人员可以清楚地了解到 本发明可借助软件加必需的通用硬件平台的方式来实现， 当然也可以通 过硬件， 但很多情况下前者是更佳的实施方式。 基于这样的理解， 本发 明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产 品的形式体现出来， 该计算机软件产品存储在一个存储介质中， 包括若 干指令用以使得一台 UE设备（可以是手机， 个人计算机， 服务器， 或 者网络设备等）执行本发明各个实施例所述的方法。
以上公开的仅为本发明的几个具体实施例， 但是， 本发明并非局 限于此，任何本领域的技术人员能思之的变化都应落入本发明的保护 范围。

Claims

权利要求书
1、 一种网络选择方法， 其特征在于， 该方法包括：
策略选择实体获取核心网策略和接入网策略；
所述策略选择实体确定在采用核心网策略和接入网策略进行网络 选择时的协调机制；
所述策略选择实体将所述协调机制发送给用户设备 UE, 用于指示 所述 UE根据所述协调机制进行网络选择。
2、 如权利要求 1 所述的方法， 其特征在于， 所述协调机制为： 当 采用核心网策略的网络选择结果为优先选择非 3GPP网络接入， 采用接 入网策略的网络选择结果为优先选择 3GPP网络接入时， 关闭 UE的非 3GPP网络接入功能或根据接入网策略进行网络选择；
或者，
所述协调机制为： 当采用核心网策略的网络选择结果为优先选择 3GPP 网络接入， 采用接入网策略的网络选择结果为优先选择非 3GPP 网络网络接入时， 根据接入网策略进行网络选择。
3、 如权利要求 2所述的方法， 其特征在于， 所述接入网策略为根 据 3GPP网络和非 3GPP网络的负荷或信道质量选择网络接入；
关闭 UE的非 3GPP网络接入功能的协调机制为： 当 UE位于 3GPP 网络基站和非 3GPP网络接入点共同覆盖范围内， 且非 3GPP网络的负 荷高于设定阈值或信道质量低于设定阈值时， 关闭非 3GPP网络接入功 h
匕。
4、 如权利要求 2所述的方法， 其特征在于， 所述接入网策略为根 据 3GPP网络和非 3GPP网络的负荷或信道质量选择网络接入；
当采用核心网策略的网络选择结果为优先选择 3GPP网络接入， 采 用接入网策略的网络选择结果为优先选择非 3GPP网络网络接入时， 根 据接入网策略进行网络选择， 包括：
当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内， 且非 3GPP网络的负荷低于设定阈值时，根据接入网策略进行网络选择； 或者，
当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内， 且非 3GPP网络的信道质量高于设定阈值时， 根据接入网策略进行网络 选择； 或者，
当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内， 且非 3GPP网络的信道质量高于设定阈值、 3GPP网络的信道质量低于设 定阈值时， 根据接入网策略进行网络选择。
5、 如权利要求 1 所述的方法， 其特征在于， 所述协调机制为： 当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内时，在业 务进行过程中， 根据接入网策略进行网络选择， 在业务结束后， 根据核 心网策略进行网络选择。
6、 如权利要求 1 所述的方法， 其特征在于， 所述策略选择实体将 所述协调机制发送给 UE之后， 还包括： 向 UE发送关闭接入网策略的 指示， 用于指示 UE根据核心网策略进行网络选择；
所述策略选择实体在向 UE发送关闭接入网策略的指示之后， 还包 括： 向 UE发送开启接入网策略的指示， 用于指示所述 UE根据所述协 调机制进行网络选择。
7、 如权利要求 1-6之一所述的方法， 其特征在于， 所述策略选择实 体集成于 UE上， 或者所述策略选择实体位于网络侧；
所述策略选择实体位于 UE上时， 所述策略选择实体采用 UE内部 的信息交互机制， 将所述协调机制发送给 UE内进行网络选择的功能模 块；
所述策略选择实体位于网络侧时， 所述策略选择实体将所述协调机 制通过或不通过中间设备发送给 UE。
8、 一种策略选择实体装置， 其特征在于， 包括：
获取模块， 用于获取核心网策略和接入网策略；
决策模块， 用于确定在采用核心网策略和接入网策略进行网络选择 时的协调机制；
发送模块， 用于将所述协调机制发送给用户设备 UE, 所述协调机 制用于指示所述 UE根据所述协调机制进行网络选择。
9、 如权利要求 8 所述的装置， 其特征在于， 所述决策模块决策出 的协调机制具体为： 当采用核心网策略的网络选择结果为优先选择非 3GPP网络接入，采用接入网策略的网络选择结果为优先选择 3GPP网络 接入时， 关闭 UE的非 3GPP网络接入功能或根据接入网策略进行网络 选择； 或者，
所述决策模块决策出的协调机制具体为： 当采用核心网策略的网络 选择结果为优先选择 3GPP网络接入， 采用接入网策略的网络选择结果 为优先选择非 3GPP网络网络接入时， 根据接入网策略进行网络选择。
10、 如权利要求 9所述的装置， 其特征在于， 所述接入网策略为根 据 3GPP网络和非 3GPP网络的负荷或信道质量选择网络接入；
所述决策模块决策出的关闭 UE的非 3GPP网络接入功能的协调机 制具体为： 当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖 范围内， 且非 3GPP网络的负荷高于设定阈值或信道质量低于设定阈值 时， 关闭非 3GPP网络接入功能。
11、 如权利要求 9所述的装置， 其特征在于， 所述接入网策略为根 据 3GPP网络和非 3GPP网络的负荷或信道质量选择网络接入； 所述决策模块决策出的根据接入网策略进行网络选择的协调机制 具体为： 当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范 围内， 且非 3GPP网络的负荷低于设定阈值时， 根据接入网策略进行网 络选择； 或者，
当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内， 且非 3GPP网络的信道质量高于设定阈值时， 根据接入网策略进行网络 选择； 或者，
当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内， 且非 3GPP网络的信道质量高于设定阈值、 3GPP网络的信道质量低于设 定阈值时， 根据接入网策略进行网络选择。
12、如权利要求 8所述的装置， 其特征在于， 所述协调机制具体为： 当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内时， 在业务进行过程中， 根据接入网策略进行网络选择， 在业务结束后， 根 据核心网策略进行网络选择。
13、如权利要求 8所述的装置， 其特征在于， 所述决策模块还用于， 在所述发送模块将所述协调机制发送给 UE之后， 通过所述发送模块向 UE发送关闭接入网策略的指示，用于指示 UE根据核心网策略进行网络 选择；
所述决策模块还用于， 在所述发送模块向 UE发送关闭接入网策略 的指示之后， 通过所述发送模块向 UE发送开启接入网策略的指示， 用 于指示所述 UE根据所述协调机制进行网络选择。
14、 如权利要求 8-13之一所述的装置， 其特征在于， 所述策略选择 实体装置集成于 UE上， 或者所述策略选择实体装置位于网络侧；
所述策略选择实体装置位于 UE上时， 所述策略选择实体装置中的 发送模块采用 UE内部的信息交互机制， 将所述协调机制发送给 UE内 进行网络选择的功能模块；
所述策略选择实体装置位于网络侧时， 所述策略选择实体装置中的 发送模块将所述协调机制通过或不通过中间设备发送给 UE。
15、 一种策略选择实体装置， 其特征在于， 包括： 处理器及存储器， 其中，
存储器， 用于存储在采用核心网策略和接入网策略进行网络选择时 的协调机制；
处理器， 用于获取核心网策略和接入网策略， 基于存储器存储的在 采用核心网策略和接入网策略进行网络选择时的协调机制， 确定在采用 核心网策略和接入网策略进行网络选择时的协调机制， 将所确定的协调 机制机制发送给用户设备 UE,所述协调机制用于指示所述 UE根据所述 协调机制进行网络选择。
16、 如权利要求 15 所述的装置， 其特征在于， 所述确定在采用核 心网策略和接入网策略进行网络选择时的协调机制为：
当采用核心网策略的网络选择结果为优先选择非 3GPP网络接入， 采用接入网策略的网络选择结果为优先选择 3GPP网络接入时，关闭 UE 的非 3GPP网络接入功能或根据接入网策略进行网络选择； 或者，
当采用核心网策略的网络选择结果为优先选择 3GPP网络接入， 采 用接入网策略的网络选择结果为优先选择非 3GPP网络网络接入时， 根 据接入网策略进行网络选择； 或者
当 UE位于 3GPP网络基站和非 3GPP网络接入点共同覆盖范围内 时， 在业务进行过程中，根据接入网策略进行网络选择， 在业务结束后， 根据核心网策略进行网络选择。
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