WO2013063984A1 - 一种拥塞信息的通知方法和设备 - Google Patents

一种拥塞信息的通知方法和设备 Download PDF

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Publication number
WO2013063984A1
WO2013063984A1 PCT/CN2012/081352 CN2012081352W WO2013063984A1 WO 2013063984 A1 WO2013063984 A1 WO 2013063984A1 CN 2012081352 W CN2012081352 W CN 2012081352W WO 2013063984 A1 WO2013063984 A1 WO 2013063984A1
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WIPO (PCT)
Prior art keywords
andsf
congestion information
message
information
access network
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PCT/CN2012/081352
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English (en)
French (fr)
Inventor
周燕飞
徐晖
Original Assignee
电信科学技术研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to US14/355,386 priority Critical patent/US20150055494A1/en
Priority to EP12846281.9A priority patent/EP2775754A4/en
Publication of WO2013063984A1 publication Critical patent/WO2013063984A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0284Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0247Traffic management, e.g. flow control or congestion control based on conditions of the access network or the infrastructure network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/06Generation of reports
    • H04L43/062Generation of reports related to network traffic
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/02Access restriction performed under specific conditions
    • H04W48/06Access restriction performed under specific conditions based on traffic conditions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and a device for notifying congestion information. Background technique
  • EPS Evolved Packet System
  • EPS supports multiple wireless access such as 3GPP (The 3rd Generation Partnership Project) and non-3GPP access.
  • Means such as UTRAN (Universal Terrestrial Radio Access Network), E-UTRAN (Evolved UTRAN), CDMA2000 (Code Division Multiple Access), WLAN (Wireless Local Access Network, wireless LAN), etc.
  • the EPS network is a multi-access network.
  • the core network control node is the MME (Mobility Management Entity, mobility management entity).
  • the gateway node is SGW (Serving Gateway) and PGW (PDN Gateway, Packet Data Network, PDN, Packet Data Network, Packet Data Network); when the UE accesses the core network through non-3GPP access technology Accessing the PDN providing the service through the PGW; specifically, if the non-3GPP access network is trusted (ie, the trusted non-3GPP IP access in the figure), the PGW can be directly accessed; if the non-3GPP access is not trusted (ie, In the figure, untrusted non-3GPP IP access), for security requirements, needs to access PGWo via ePDG (Evolved Packet Data Gateway).
  • the network may provide information about the available wireless access system to the UE, and the function is discovered and selected by the Access Network Discovery and Selection Function (AND) in the network. Function) Implementation.
  • AND Access Network Discovery and Selection Function
  • the policy provided by the ANDSF is provided and configured by the operator.
  • the UE cannot know whether an access network has been congested based on the ANDSF policy. Summary of the invention
  • the embodiment of the invention provides a method and a device for notifying congestion information, so as to use the ANDSF policy message to know whether the access network has been congested.
  • an embodiment of the present invention provides a method for notifying congestion information, including:
  • the ANDSF entity obtains congestion information of the access network; the ANDSF entity notifies the user equipment of the congestion information through an ANDSF policy message.
  • An embodiment of the present invention provides a method for notifying congestion information, including:
  • the user equipment receives the access network discovery and selection function and the congestion information of the access network notified by the ANDSF entity through the ANDSF policy message;
  • the user equipment obtains the congestion information from the ANDSF policy message.
  • An embodiment of the present invention provides an access network discovery and selection function ANDSF entity, including:
  • a sending module configured to notify the user equipment of the congestion information by using an ANDSF policy message.
  • An embodiment of the present invention provides a user equipment, including:
  • a receiving module configured to receive an access network discovery and selection function, an ANDSF entity Congestion information of the access network notified by the ANDSF policy message;
  • an obtaining module configured to obtain the congestion information from the ANDSF policy message.
  • the embodiment of the present invention has at least the following advantages: By carrying the congestion information of the access network in the ANDSF policy message, the UE can learn the congestion of different access networks from the ANDSF policy message, and then according to the congestion The situation selects the wireless access network used, thereby avoiding the situation that the UE cannot access the network because it is not aware of the network congestion.
  • FIG. 1 is a schematic diagram of a multi-access EPS network in the prior art
  • FIG. 2 is a schematic diagram of an access network discovery and selection architecture in a non-roaming scenario in the prior art
  • FIG. 3 is a schematic diagram of a specific format of an ISMP in the prior art
  • FIG. 4 is a schematic diagram of a composition of an ISRP policy in the prior art
  • FIG. 5 is a schematic diagram of a specific format of an ISRP IFOM policy in the prior art
  • FIG. 6 is a schematic diagram of a specific format of an ANDI in the prior art
  • FIG. 7 is a schematic flowchart of a method for notifying congestion information according to Embodiment 1 of the present invention.
  • FIG. 8 is a schematic diagram showing a specific format of an ISMP to which an information element is added according to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic diagram showing a specific format of an IFOM policy of an ISRP with an information element added in Embodiment 1 of the present invention.
  • FIG. 10 is a schematic diagram showing a specific format of an ANDI of an information element added to a WiMAX access network
  • FIG. 11 is a schematic structural diagram of an ANDSF entity according to Embodiment 2 of the present invention
  • FIG. 12 is a schematic structural diagram of a user equipment according to Embodiment 3 of the present invention.
  • EPS supports multiple radio access modes such as 3GPP access and non-3GPP access, and supports multiple access systems.
  • the UE can provide the UE with information about the available wireless access system. This function is implemented by the ANDSF (Access Network Discovery and Selection Function) in the network.
  • ANDSF Access Network Discovery and Selection Function
  • FIG. 2 it is a schematic diagram of the access network discovery and selection architecture in a non-roaming scenario.
  • the ANDSF is Home ANDSF (H-ANDSF), and the UE and the ANDSF communicate through the S14 interface. Through the ANDSF, the UE can learn some information about the access network.
  • the communication modes between the UE and the ANDSF are both Pull and Push: The pull mode is that the UE actively requests the ANDSF, and the Push mode is that the ANDSF actively pushes the relevant information to the UE.
  • the ANDSF provides network discovery and selection related information to the UE based on the operator policy, including: (1) ISMP (Inter-system mobility policy), and ISMP defines the rules and preference information of the operator. It defines whether to allow cross-system mobility, the type of access technology that is most suitable for accessing EPC (Evolved packet core), and different priorities of different access methods.
  • the ISMP may be pre-configured in the UE, or may be sent when the UE requests, or may be pushed to the UE by the ANDSF under some trigger.
  • 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 type (such as WLAN, WiMAX, etc.), radio access network identification, carrier frequency, etc.
  • access technology type such as WLAN, WiMAX, etc.
  • radio access network identification such as CDMAX, etc.
  • ISRP Inter-System Routing Policy
  • IFOM IP Flow Mobility, IP Flow Mobility
  • MAPCON Multiple Access PDN Connectivity
  • the ISRP contains the following information: a) For IFOM, one or more Filter Rules
  • each filtering rule identifies a list of prioritized access networks that can be used when the data meets a particular IP flow filter, and the types of access networks that are prohibited from being used.
  • MAPCON containing one or more Filter Rules, each rule identifies a list of prioritized access networks that can be used when a condition for routing a PDN connection to a particular port is met, and an access network that is prohibited from use Types of.
  • each rule defines which data should use non-seamless WLAN offloading; in addition, for specific data, it can also restrict non-seamless use WLAN offloading, or allowing non-seamless WLAN offloading only in a particular WLAN access network.
  • the ANDSF selects the ISMP, ANDI, and ISRP that are provided to the UE according to the operator's requirements and the roaming agreement.
  • the ANDSF may provide the above three policies at the same time, or may provide only some of the policies.
  • the ANDSF can interact with some databases in the carrier network, such as HSS (Home Subscriber Server), to obtain the required information.
  • HSS Home Subscriber Server
  • the UE receives the access network information that is higher than the access network information of the existing access network, and the user allows, the UE should perform the discovery and reselection process to the high priority access network; When entering the network, it cannot access the EPC through the access network marked as prohibited in the ISMP.
  • ISMP as shown in Figure 3, is a schematic diagram of the ISMP format.
  • An ISMP can contain one or more policies.
  • RulePriority defines the priority of a policy in ISMP.
  • PrioritizedAccess defines a specific access technology.
  • UpdatePolicy defines whether the UE is allowed to actively request an update policy.
  • ISRP can be composed of policies based on IFOM, MAPCON and non-seamless WLAN offload, as shown in Figure 4, which is a schematic diagram of the ISRP policy; Take the IFOM-related policy as an example. As shown in Figure 5, it is a schematic diagram of the specific format of the ISRP IFOM policy.
  • the IPFlow information element defines the attributes of a specific IP flow.
  • the RoutingCriteria defines the specific area, time, etc. that the IFOM is allowed to execute.
  • the RoutingRule defines Access technology, access identifier, and priority information used when IFOM is performed on a specific IP stream.
  • ANDI as shown in Figure 6, is a schematic diagram of the specific format of ANDI, ANDI defines the access network information available in a specific area, AccessNetworkType defines the access network type (such as WLAN, 3GPP, etc.) information; AccessNetworkArea definition Specific location information; AccessNetworklnformationRef defines access network related information.
  • AccessNetworkType defines the access network type (such as WLAN, 3GPP, etc.) information
  • AccessNetworklnformationRef defines access network related information.
  • Congestion control in 3GPP systems is divided into two parts: wireless access network congestion control and network congestion control.
  • the congestion control on the radio access network side includes: (1) Broadcasting ACB (Access Control Barring) information, which means that when the base station needs to restrict access to the UE, it carries an ac-BarringInfo information in the broadcast message. Can contain the following amount of information:
  • ac-BarringFactor can take any of these 16 values; when ac-Barringlnfo is set in the received broadcast message, the UE will automatically generate a 0 to a random number between 1, if the random number is higher than the value carried in the ac-BarringFactor, it means that the UE is allowed to access the network. Otherwise the access of this UE will be forbidden.
  • the base station can control the percentage of UEs capable of initiating access by setting different ac-Barringlnfo, so that UE access can be controlled according to network congestion.
  • the RAN side rejects the RRC (Radio Resource Control) connection and the channel request message, and the RAN side rejects the RRC connection request of the UE according to a certain indication (such as the congestion indication information from the core network).
  • a certain indication such as the congestion indication information from the core network.
  • the congestion control on the network side is mainly by rejecting the NAS (Non-Access Stratum) message of the UE.
  • the core network control node rejects the NAS request of the UE, and optionally carries a backoff time, so that the UE does not initiate the access request for a certain period of time.
  • the policies provided by the ANDSF are mainly provided and configured by the operator.
  • the policies of the ANDSF are different according to the available access modes and UE information of different locations.
  • the current congestion policy of the access network does not reflect the congestion information of the access network. That is, the UE cannot know whether an access network has been congested from the ANDSF policy, resulting in the following problems:
  • WiMAX access has the highest priority in a specific area, and WiMAX access should be selected when the UE enters the above specific area; however, WiMAX is congested for a period of time, and the UE cannot know according to the existing ANDSF policy. Congestion information, so the UE still selects WiMAX to access the EPC; since the access network is in a congested state at this time, the UE will likely be denied access, resulting in failure to obtain service.
  • the Web service of the UE uses the WLAN access and the other services access through the EUTRAN; the WLAN access is congested within a certain period of time, and according to the existing ANDSF policy, the UE The WLAN congestion information cannot be known. When the Web service is used, the WLAN will still be selected, which will result in the service being unavailable and affecting the user experience.
  • the existing EPS system supports multiple types of 3GPP access and non-3GPP access types, and can provide access network related information for the UE through the ANDSF entity. Based on the foregoing findings, if the UE can learn the congestion information of the access network, the problem that the network network cannot be accessed due to network congestion will be avoided. Therefore, the embodiment of the present invention provides a method and a device for notifying congestion information.
  • the congestion information of the access network is embodied in the ANDSF policy, that is, the congestion information of the access network is carried in the ANDSF policy message, so that the UE can learn the congestion of different access networks from the ANDSF policy message, and then select and use according to the congestion situation.
  • the wireless access network avoids the situation that the UE cannot access the network because it is not aware of the network congestion.
  • Embodiment 1 of the present invention provides a method for notifying congestion information. As shown in FIG. 7, the method includes the following steps:
  • Step 701 The ANDSF entity obtains congestion information of the access network.
  • the ANDSF entity can be used as an application front end under the UDC (User Data Convergence) architecture to communicate with the UDR (User Data Repository) in the network.
  • UDC User Data Convergence
  • Other entities in the network can also interact with ANDSF interacts. Therefore, the ANDSF entity can obtain congestion information of the access network.
  • the ANDSF entity obtains congestion information through the configuration of the operator. Specifically, the operator may configure congestion information on the ANDSF entity after obtaining the congestion information, so that the ANDSF entity can obtain the congestion information.
  • the ANDSF entity may update the congestion information of the access network at a certain frequency according to a preset period, that is, obtain the connection according to the preset period.
  • Congestion mode 3 of the incoming network The ANDSF entity obtains congestion information through previous interaction with the UE. With The UE may report the congestion information of the access network to the ANDSF entity, and the ANDSF entity determines whether the access network enters a congestion state according to the congestion information reported by multiple UEs.
  • Step 702 The ANDSF entity notifies the congestion information to the ANDSF policy message.
  • an information element indicating congestion information may be set in the ANDSF policy message (that is, an information element indicating a congestion condition is added to the access mode/access network in the ANDSF policy message), and the information element is used for The congestion information is carried, and different values of the information element (that is, different values of the congestion information) indicate different congestion levels.
  • the congestion information when the information element has a value of 0 (that is, the congestion information is 0), the congestion degree is high, and when the information element has a value of 1 (that is, the congestion information is 1), the congestion degree is low.
  • the congestion information is It can also directly address the high degree of congestion and low congestion.
  • the ANDSF entity can obtain the congestion information from the information exchanged with the network, or obtain the congestion information through the configuration of the operator. Therefore, the ANDSF entity can set the value of the information element according to the congestion condition of different access networks. Or the network operator sets the value of the above information element.
  • the method when the ANDSF entity notifies the UE of the congestion information by using the ANDSF policy message, the method includes: when the congestion information of the access network changes (that is, the value of the information element of the access mode/access network changes), The ANDSF entity notifies (ie, actively notifies) the changed congestion information to the UE through the ANDSF policy message; or, when the ANDSF entity receives the message of the UE's request policy, the ANDSF entity sends the current congestion information through the ANDSF policy message. Notification (ie passive notification) to the UE.
  • the ANDSF policy message includes one or more of the following: an inter-system mobility policy ISMP message based on an ANDSF policy; an inter-system routing policy ISRP message based on an ANDSF policy; and an access network discovery information based on an ANDSF policy. ANDI message.
  • Step 703 The UE receives the congestion information of the access network notified by the ANDSF entity through the ANDSF policy message.
  • the UE receives the changed congestion information notified by the ANDSF entity through the ANDSF policy message; or, in the UE After sending the message requesting the policy to the ANDSF entity, the UE receives the ANDSF entity and passes the
  • Step 704 The UE obtains congestion information from the ANDSF policy message.
  • the information element indicating the congestion information is set in the ANDSF policy message, and the information element is used to carry the congestion information, different values of the information element indicate different congestion levels; therefore, the UE may be from the ANDSF policy message. Congestion information is obtained in the information element.
  • the UE may identify the information element in which the congestion information is indicated, and select whether to use a certain radio access network or access technology according to the value of the information element.
  • the operation corresponding to each value of the information element is implemented based on the UE. For example, when the congestion information of the access network is high, the UE determines not to use the access network; when the congestion information of the access network is When the degree of congestion is low, the UE determines to use the access network.
  • the specific implementation of the UE is not described in the embodiment of the present invention, and the implementation manner may be selected according to actual needs.
  • the following describes the ISMP message based on the ANDSF policy, the ISRP message based on the ANDSF policy, and the ANDI message based on the ANDSF policy.
  • Case 1 The information element indicating the access network congestion information is added to the ISMP of the ANDSF policy, as shown in FIG. 8, which is a schematic diagram of the specific format of the ISMP with the information element added.
  • the AccessTechnology information element defines a specific access technology, and the AccessID identifies different access networks having the same access technology; and a Congestion indication information element is added under each AccessID, and the information element indicates congestion information of the access network.
  • the corresponding Congestion indication information element sets different values.
  • the ANDSF entity may actively update the policy to the UE, or may wait for the UE to request the updated policy.
  • the UE may view the congestion indication corresponding to the access network, and based on the value of the information element, the UE may determine whether to select a certain access network access according to a certain policy. Assuming that the congestion indication corresponding to a WLAN network indicates that the network is already congested, the UE may choose to use it. It accesses the EPC.
  • Case 2 The information element indicating the access network congestion information is added to the ISRP of the ANDSF policy.
  • the IFOM policy is taken as an example. As shown in FIG. 9, the specific format of the IFOM policy of the ISRP of the information element is added.
  • Another sub port 1 J energizing a Congestion indication and the AccessID Secondary AccessID RoutingRule information element in this information, meta information indicates congestion of the access network.
  • the corresponding Congestion indication information element sets different values.
  • the ANDSF entity may actively update the policy to the UE, or may wait for the UE to request the updated policy.
  • the UE may view the congestion indication corresponding to the access network allowed by the specific IP stream. If the network is already congested, the IFOM may not be started, that is, the UE does not use the access network to offload the IP data. Otherwise, the UE uses the access network to perform IFOM.
  • Case 3 Add an information element indicating the access network congestion information in the ANDI of the ANDSF policy, specifically adding the information element in the AccessNetworklnformationRef of the ANDI, specifically, the information element of the boosting port and the specific type of the access network in the AccessNetworklnformationRef Correlation, as shown in FIG. 10, is a schematic diagram of a specific format of an ANDI of an information element for a WiMAX access network, where a Congestion Indication is a newly added information element.
  • the foregoing case 1, the second case and the third case may also be used in combination, that is, in the ANDSF policy, congestion information may be added in one or more of the ISMP, the ISRP, and the ANDI, and the embodiment of the present invention is processed accordingly. I won't go into details here.
  • the embodiment of the present invention further provides an access network discovery and selection function ANDSF entity.
  • the ANDSF entity includes:
  • the obtaining module 11 is configured to obtain congestion information of the access network.
  • the obtaining module 11 is specifically configured to obtain the congestion information from information exchanged with the network; or obtain the congestion information by using an operator configuration.
  • the sending module 12 is configured to notify the user equipment of the congestion information by using an ANDSF policy message.
  • An information element indicating congestion information is set in the ANDSF policy message, where the information element is used to carry the congestion information; and different values of the information element indicate different congestion levels.
  • the sending module 12 is specifically configured to: when the congestion information of the access network changes, notify the user equipment of the changed congestion information by using an ANDSF policy message; or, when receiving the When the message of the user equipment requests the policy, the current congestion information is notified to the user equipment by using an ANDSF policy message.
  • the ANDSF policy message includes one or more of the following: an inter-system mobility policy ISMP message based on an ANDSF policy; an inter-system routing policy ISRP message based on an ANDSF policy; and an access network based on an ANDSF policy Discover the information ANDI message.
  • modules of the device of the present invention may be integrated or integrated.
  • the above modules can be combined into one module, or can be further split into multiple sub-modules.
  • the embodiment of the present invention further provides a user equipment.
  • the user equipment includes:
  • the receiving module 21 is configured to receive access network discovery and selection function congestion information of the access network notified by the ANDSF entity through the ANDSF policy message.
  • the receiving module 21 is configured to: when the congestion information of the access network changes, receive the changed congestion information notified by the ANDSF entity by using an ANDSF policy message; or send a message requesting the policy to the ANDSF entity. Then, the current congestion information notified by the ANDSF entity through the ANDSF policy message is received.
  • the obtaining module 22 is configured to obtain the congestion information from the ANDSF policy message.
  • the ANDSF policy message is provided with an information element indicating congestion information, where the information element is used to carry the congestion information; and different values of the information element indicate different congestion levels.
  • the obtaining module 22 is specifically configured to obtain the congestion information from an information element of the ANDSF policy message.
  • the ANDSF policy message includes one or more of the following: an inter-system mobility policy ISMP message based on an ANDSF policy; an inter-system routing policy ISRP message based on an ANDSF policy; and an access network based on an ANDSF policy Discover the information ANDI message.
  • modules of the device of the present invention may be integrated or integrated.
  • the above modules can be combined into one module, or can be further split into multiple sub-modules.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

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Abstract

本发明公开了一种拥塞信息的通知方法和设备,该方法包括:接入网发现和选择功能ANDSF实体获得接入网络的拥塞信息;所述ANDSF实体通过ANDSF策略消息将所述拥塞信息通知给用户设备。本发明实施例中,通过在ANDSF策略消息中携带接入网络的拥塞信息,使得UE可以从ANDSF策略消息中获知不同接入网络的拥塞情况,进而根据拥塞情况选择使用的无线接入网络,从而避免了UE由于对网络拥塞情况不知而不能接入网络的情况。

Description

一种拥塞信息的通知方法和设备 本申请要求于 2011 年 11 月 2 日提交中国专利局, 申请号为 201110341378.4, 发明名称为 "一种拥塞信息的通知方法和设备" 的 中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域,尤其涉及一种拥塞信息的通知方法和 设备。 背景技术
在支持多接入的 EPS ( Evolved Packet System, 演进的分组*** ) 网络中, EPS支持 3GPP ( The 3rd Generation Partnership Project, 第 三代合作伙伴计划)接入和非 3GPP接入等多种无线接入方式, 如 UTRAN ( Universal Terrestrial Radio Access Network, 通用陆地无线接 入网)、 E-UTRAN ( Evolved UTRAN, 演进的通用陆地无线接入网)、 CDMA2000 ( Code Division Multiple Access , 码分多址)、 WLAN ( Wireless Local Access Network , 无线局域网)等。
如图 1 所示, 为多接入的 EPS 网络示意图, 当 UE ( User Equipment, 用户设备)通过 3GPP接入技术接入核心网时, 核心网 控制节点为 MME ( Mobility Management Entity , 移动性管理实体), 网关节点为 SGW ( Serving Gateway , 月良务网关) 和 PGW ( PDN Gateway, 分组数据网络网关; PDN, Packet Data Network, 分组数据 网络); 当 UE通过非 3GPP接入技术接入核心网时, 通过 PGW接入 提供业务的 PDN; 具体地, 如果非 3GPP接入网络可信(即图中的 trusted non-3GPP IP access ), 则可以直接接入 PGW; 如果非 3GPP接 入不可信(即图中 untrusted non-3GPP IP access ), 则出于安全需求, 需要经过 ePDG( Evolved Packet Data Gateway,演进的分组数据网关 ) 接入 PGWo 现有技术中, 对于支持多种接入***的 UE, 网络可以向 UE提 供可用的无线接入***的信息,该功能通过网络中的 ANDSF( Access Network Discovery and Selection Function, 接入网发现和选择功能 ) 实现。
在实现本发明的过程中,发明人发现现有技术中至少存在以下问 题:
现有技术中, ANDSF所提供的策略由运营商提供和配置, 然而, 目前 UE无法基于 ANDSF策略获知某种接入网络是否已经发生拥塞。 发明内容
本发明实施例提供一种拥塞信息的通知方法和设备, 以利用 ANDSF策略消息获知接入网络是否已经发生拥塞。
为了达到上述目的, 本发明实施例提供一种拥塞信息的通知方 法, 包括:
接入网发现和选择功能 ANDSF实体获得接入网络的拥塞信息; 所述 ANDSF实体通过 ANDSF策略消息将所述拥塞信息通知给 用户设备。
本发明实施例提供一种拥塞信息的通知方法, 包括:
用户设备接收接入网发现和选择功能 ANDSF实体通过 ANDSF 策略消息通知的接入网络的拥塞信息;
所述用户设备从所述 ANDSF策略消息中获得所述拥塞信息。 本发明实施例提供一种接入网发现和选择功能 ANDSF实体, 包 括:
获得模块, 用于获得接入网络的拥塞信息;
发送模块, 用于通过 ANDSF策略消息将所述拥塞信息通知给用 户设备。
本发明实施例提供一种用户设备, 包括:
接收模块, 用于接收接入网发现和选择功能 ANDSF 实体通过 ANDSF策略消息通知的接入网络的拥塞信息;
获得模块, 用于从所述 ANDSF策略消息中获得所述拥塞信息。 与现有技术相比, 本发明实施例至少具有以下优点: 通过在 ANDSF 策略消息中携带接入网络的拥塞信息, 使得 UE 可以从 ANDSF策略消息中获知不同接入网络的拥塞情况, 进而根据拥塞情 况选择使用的无线接入网络, 从而避免了 UE由于对网络拥塞情况不 知而不能接入网络的情况。 附图说明
图 1为现有技术中多接入的 EPS网络示意图;
图 2 为现有技术中非漫游场景下的接入网络发现和选择架构示 意图;
图 3为现有技术中 ISMP的具体格式示意图;
图 4为现有技术中 ISRP策略构成的示意图;
图 5为现有技术中 ISRP的 IFOM策略具体格式示意图; 图 6为现有技术中 ANDI的具体格式示意图;
图 7 为本发明实施例一提供的一种拥塞信息的通知方法流程示 意图;
图 8为本发明实施例一中添加了信息元的 ISMP的具体格式示意 图;
图 9为本发明实施例一中添加了信息元的 ISRP的 IFOM策略具 体格式示意图;
图 10为对于 WiMAX接入网络, 增加了信息元的 ANDI的具体 格式示意图;
图 11为本发明实施例二提供的一种 ANDSF实体的结构示意图; 图 12为本发明实施例三提供的一种用户设备的结构示意图。 具体实施方式 下面结合附图和实施例,对本发明的具体实施方式作进一步详细 描述:
在实现本发明的过程中, 发明人注意到以下问题: 在支持多接入 的 EPS网络中, EPS支持 3GPP接入和非 3GPP接入等多种无线接入 方式, 对于支持多种接入***的 UE, 网络可以向 UE提供可用的无 线接入***的信息, 该功能通过网络中的 ANDSF ( Access Network Discovery and Selection Function , 接入网发现和选择功能) 实现。
如图 2 所示, 为非漫游场景下的接入网络发现和选择架构示意 图。 ANDSF为 Home ANDSF ( H- ANDSF ), 且 UE和 ANDSF之间通 过 S14接口通信;通过 ANDSF, UE可以获知有关接入网络的一些信 息; UE与 ANDSF之间的通信方式有 Pull和 Push两种: Pull方式是 UE主动向 ANDSF请求, Push方式是 ANDSF主动向 UE推送相关信
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:( 1 ) ISMP ( Inter-system mobility policy,跨***的移动性策略), ISMP为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 EPC ( Evolved packet core, 演进的分组核心) 的接入技术类型、 不同接入方式的不同优先级等信息。 其中, 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。
( 2 ) ANDI ( Access Network Discovery Information, 接入网络发 现信息), 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, 如接入技术类型 (如 WLAN, WiMAX等)、 无线接入网络标识、 载波频率等。
( 3 ) ISRP ( Inter-System Routing Policy,跨***路由策略), ISRP 包含一些跨***路由所需的信息, 对于具有多无线接入接口的 UE, 如支持 IFOM ( IP Flow Mobility, IP流移动性)或 MAPCON ( Multi Access PDN Connectivity, 多接入 PDN连接) 的 UE, 这些信息可以 用于决定: 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; 对于特定 IP数据流和 /或特定 APN ( Access Point Name, 接入 点) 而言, 某种接入网络何时被禁用。
ISRP包含的信息如下: a )对于 IFOM,包含一个或多个 Filter Rules
(过滤规则 ), 每个过滤规则标识了当数据满足特定 IP流过滤器时, 可使用的具有优先级的接入网络列表, 以及禁止使用的接入网络类 型。 b )对于 MAPCON, 包含一个或多个 Filter Rules , 每个规则标识 了当满足将 PDN连接路由到特定 ΑΡΝ的条件时,可使用的具有优先 级的接入网络列表, 以及禁止使用的接入网络类型。 c )对于非无缝 的 WLAN分流, 包含一个或多个 Filter Rules , 每个规则定义了哪种 数据是否应当使用非无缝的 WLAN分流; 此外, 对于特定数据, 还 可限制使用非无缝的 WLAN分流,或仅在特定 WLAN接入网络中允 许使用非无缝的 WLAN分流。
在现有协议中规定, 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。 其中, ANDSF可以与运营商网 络中的一些数据库交互, 如 HSS ( Home Subscriber Server, 归属用户 服务器), 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, 且用户允许时, 则 UE应当执行到该高优 先级接入网络的发现和重选过程; 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。
需要注意的是, 当前定义了 ANDSF策略的具体格式, 分别为:
( 1 ) ISMP, 如图 3所示, 为 ISMP的具体格式示意图, 一个 ISMP 可以包含一个或多个策略, RulePriority定义了某个策略在 ISMP中的 优 先 级 ; PrioritizedAccess 定 义 了 具 体 的 接 入 技 术
( AccessTechnology )、 接入网络标识 AccessID和接入技术的优先级
( AccessNetworkPriority ); UpdatePolicy定义是否允许 UE主动请求 更新策略。
( 2 ) ISRP, ISRP可由基于 IFOM、 MAPCON和 non-seamless WLAN offload的策略构成,如图 4所示,为 ISRP策略构成的示意图; 以 IFOM相关的策略为例, 如图 5所示, 为 ISRP的 IFOM策略具体 格式示意图, IPFlow信息元定义了特定 IP流的属性; RoutingCriteria 定义了允许执行 IFOM的特定区域、 时间等; RoutingRule定义了对 特定 IP流进行 IFOM时所采用的接入技术、 接入标识、 优先级信息。
( 3 ) ANDI, 如图 6所示, 为 ANDI的具体格式示意图, ANDI 定义了在特定区域中可用的接入网络信息, AccessNetworkType定义 了接入网络类型(例如 WLAN、 3GPP等)信息; AccessNetworkArea 定义了具***置信息; AccessNetworklnformationRef定义了接入网络 相关信息。
此外, 需要注意的是, 当网络发生拥塞时, 需要有一定机制来保 护网络, 以避免更多 UE的后续接入使得网络状况进一步恶化。 3GPP ***内的拥塞控制分为无线接入网拥塞控制和网络拥塞控制两部分。
无线接入网侧的拥塞控制包括: (1 )广播 ACB ( Access Control Barring, 接入控制限制)信息, 指当基站需要限制 UE接入时, 在广 播消息中携带一个 ac-Barringlnfo信息, 上述信息中可以包含下列信 息量:
ac-BarringFactor ENUMERATED {
pOO, p05 , plO, pl5 , p20, p25 , p30, p40,
p50, p60, p70, p75 , p80, p85 , p90, p95 } ,
ac-BarringTime ENUMERATED { s4, s8, sl6, s32, s64, sl28, s256, s512} ,
ac-BarringForSpecialAC BIT STRING ( SIZE ( 5 ) ) 其中 ac-BarringFactor表示 0到 1之间的随机数, pOO = 0, p05 =
0.05 , pl0 = 0.10, · · · , p95 = 0.95 , ac-BarringFactor可以取这 16个值 当中的任意一个值; 当接收到的广播消息中设置了 ac-Barringlnfo时, UE 将自动产生一个 0 到 1 之间的随机数, 如果该随机数比 ac-BarringFactor中携带的值高, 则表示这一 UE允许接入到网络中, 否则这一 UE的接入将被禁止。 如上所述, 基站可以通过设置不同的 ac-Barringlnfo来控制能够发起接入的 UE所占百分比,从而能够根据 网络拥塞情况控制 UE接入。
( 2 ) RAN侧拒绝 RRC ( Radio Resource Control, 无线资源控制 ) 连接和信道请求消息, 指 RAN侧根据一定指示(如来自核心网的拥 塞指示信息), 拒绝 UE的 RRC连接请求。
此外,网络侧的拥塞控制主要是通过拒绝 UE的 NAS( Non- Access Stratum, 非接入层)消息的方式。 当网络发生拥塞时, 核心网控制节 点拒绝 UE的 NAS请求,并可选地携带一个退避时间,使得 UE在一 定时间内不再发起接入请求。
在发现上述过程后, 可知 ANDSF所提供的策略主要由运营商提 供和配置,根据不同位置的可用接入方式、 UE信息等的不同, ANDSF 的策略也不同。 然而, 目前 ANDSF的策略中并没有体现接入网络的 拥塞信息, 即 UE从 ANDSF策略中无法获知某种接入网络是否已经 拥塞, 从而导致以下问题发生:
( 1 )根据 ANDSF策略, 在特定区域内 WiMAX接入的优先级 最高, 当 UE进入上述特定区域时应当选择 WiMAX接入; 然而在一 段时间内 WiMAX拥塞, 而根据现有 ANDSF策略, UE无法知道拥 塞信息, 因此 UE仍然选择 WiMAX接入 EPC; 由于该接入网络此时 处于拥塞状态, UE将很可能被拒绝接入, 从而导致不能获得服务。
( 2 )根据 ANDSF策略, 当 WLAN和 EUTRAN同时可用时, UE的 Web业务使用 WLAN接入而其他业务通过 EUTRAN接入; 某 个时间段内 WLAN接入发生拥塞, 而根据现有 ANDSF策略, UE无 法知道 WLAN拥塞信息, 当使用 Web业务时仍将选择 WLAN, 这将 导致业务无法获得, 影响用户体验。
进一步的, 由于数据业务的快速增长以及未来 M2M ( Machine to Machine, 机器到机器) 的 UE的大量存在, 通信网络将面临拥塞问 题。 而现有的 EPS***支持多种 3GPP接入和非 3GPP接入类型, 可 以通过 ANDSF实体为 UE提供接入网络相关信息。 基于上述发现可知, 如果 UE可以获知接入网络的拥塞信息, 则 由于网络拥塞导致的无法接入核心网的问题将得以避免; 因此本发明 实施例提供一种拥塞信息的通知方法和设备, 以在 ANDSF策略中体 现接入网络的拥塞信息, 即通过在 ANDSF策略消息中携带接入网络 的拥塞信息, 使得 UE可以从 ANDSF策略消息中获知不同接入网络 的拥塞情况, 进而根据拥塞情况选择使用的无线接入网络, 从而避免 了 UE由于对网络拥塞情况不知而不能接入网络的情况。
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。
实施例一
本发明实施例一提供一种拥塞信息的通知方法, 如图 7所示, 该 方法包括以下步骤:
步骤 701 , ANDSF实体获得接入网络的拥塞信息。
方式一: ANDSF实体可以作为 UDC ( User Data Convergence, 用户数据融合)架构下的一个应用前端,从而与网络中的 UDR ( User Data Repository, 用户数据寄存器)进行通信, 网络中的其它实体也 可以与 ANDSF进行交互。 因此 ANDSF实体可以获得接入网络的拥 塞信息。
方式二: ANDSF实体通过运营商的配置获得拥塞信息。 具体的, 运营商可在获知拥塞信息后, 在 ANDSF实体上配置拥塞信息, 从而 使得 ANDSF实体可以获得拥塞信息。
本发明实施例中, 为了使得 ANDSF实体上的拥塞信息与接入网 络的拥塞情况同步, ANDSF实体可以根据预设的周期, 以一定频率 更新接入网络的拥塞信息, 即按照预设周期获得接入网络的拥塞信 方式三: ANDSF实体通过之前与 UE的交互获得拥塞信息。 具 体的, UE可以向 ANDSF实体上报接入网络的拥塞信息, ANDSF实 体根据多个 UE上报的拥塞信息判断接入网络是否进入拥塞状态。
步骤 702, ANDSF实体通过 ANDSF策略消息将拥塞信息通知给
UE。
本发明实施例中, 可以在 ANDSF策略消息中设置表示拥塞信息 的信息元(即在 ANDSF策略消息中为接入方式 /接入网络增加一个表 示拥塞情况的信息元), 且该信息元用于承载拥塞信息, 该信息元的 不同取值(即拥塞信息的不同取值)表示不同的拥塞程度。
例如, 信息元取值为 0 (即拥塞信息为 0 )时表示拥塞程度为高, 信息元取值为 1 (即拥塞信息为 1 ) 时表示拥塞程度为低; 在实际应 用中,该拥塞信息还可以直接为拥塞程度为高、拥塞程度为低等方式。
需要注意的是, 由于 ANDSF实体可以从与网络交互的信息中获 得拥塞信息, 或者通过运营商的配置获得拥塞信息; 因此, ANDSF 实体可以根据不同接入网络的拥塞情况设置上述信息元的取值,或者 由网络运营商设置上述信息元的取值。
本发明实施例中, ANDSF实体通过 ANDSF策略消息将拥塞信 息通知给 UE具体包括: 当接入网络的拥塞信息发生变化(即某种接 入方式 /接入网络的信息元取值变化)时,该 ANDSF实体通过 ANDSF 策略消息将变化后的拥塞信息通知(即主动通知)给 UE; 或者, 当 该 ANDSF实体接收到 UE的请求策略的消息时, 该 ANDSF实体通 过 ANDSF策略消息将当前的拥塞信息通知 (即被动通知)给 UE。
本发明实施例中, ANDSF策略消息包括以下一种或几种: 基于 ANDSF策略的跨***的移动性策略 ISMP消息;基于 ANDSF策略的 跨***路由策略 ISRP消息; 基于 ANDSF策略的接入网络发现信息 ANDI消息。
步骤 703, UE接收 ANDSF实体通过 ANDSF策略消息通知的接 入网络的拥塞信息。
具体的, 当接入网络的拥塞信息发生变化时, UE接收 ANDSF 实体通过 ANDSF策略消息通知的变化后的拥塞信息; 或者, 在 UE 向 ANDSF实体发送请求策略的消息后, UE接收 ANDSF实体通过
ANDSF策略消息通知的当前的拥塞信息。
步骤 704, UE从 ANDSF策略消息中获得拥塞信息。
本发明实施例中, 由于 ANDSF策略消息中设置有表示拥塞信息 的信息元, 且信息元用于承载拥塞信息, 信息元的不同取值表示不同 的拥塞程度; 因此, UE可以从 ANDSF策略消息的信息元中获得拥 塞信息。
进一步的, 当 UE收到 ANDSF策略消息后, 可以识别其中表示 拥塞信息的信息元,并根据信息元的取值选择是否使用某种无线接入 网络或接入技术。其中,信息元的每个取值对应的操作基于 UE实现; 例如, 当接入网络的拥塞信息为拥塞程度为高时, 则 UE确定不使用 该接入网络; 当接入网络的拥塞信息为拥塞程度为低时, 则 UE确定 使用该接入网络; UE的具体实现本发明实施例中不再进行赘述, 可 以根据实际需要选择实现方式。
为了更加清楚的阐述本发明实施例提供的技术方案,以下结合基 于 ANDSF策略的 ISMP消息、基于 ANDSF策略的 ISRP消息、基于 ANDSF策略的 ANDI消息进行详细说明。
情况一、 在 ANDSF策略的 ISMP中增加表示接入网络拥塞信息 的信息元,如图 8所示,为增加了信息元的 ISMP的具体格式示意图。 AccessTechnology信息元定义了具体接入技术, AccessID标识了具有 相同接入技术的不同接入网络; 且在每个 AccessID 下增加一个 Congestion indication信息元, 该信息元表示该接入网络的拥塞信息。
该场景下, 根据接入网络的拥塞程度, 相应的 Congestion indication信息元设置不同的取值。 当取值改变时, ANDSF实体可以 主动向 UE更新策略, 也可以等待 UE请求时再发送更新的策略。
进一步的, 当 UE接收到 ISMP消息时, 可以查看某个接入网络 所对应的 congestion indication, 基于该信息元的取值, UE可以才艮据 一定策略确定是否选择某种接入网络接入。 假设某 WLAN网络对应 的 congestion indication表明该网络已经拥塞, 则 UE可以选择使用其 它接入方式接入 EPC。
情况二、 在 ANDSF策略的 ISRP中增加表示接入网络拥塞信息 的信息元,以 IFOM的策略为例,如图 9所示,为增加了信息元的 ISRP 的 IFOM策略具体格式示意图。 在 RoutingRule信息元中的 AccessID 和 Secondary AccessID下分另1 J增力口一个 Congestion indication, 该信息、 元表示该接入网络的拥塞信息。
该场景下, 根据接入网络的拥塞程度, 相应的 Congestion indication信息元设置不同的取值。 当取值改变时, ANDSF实体可以 主动向 UE更新策略, 也可以等待 UE请求时再发送更新的策略。
进一步的, 当 UE接收到 ISRP消息时, 可以查看特定 IP流允许 的接入网络对应的 congestion indication , 如果该网络已经拥塞, 则可 以不启动 IFOM , 即 UE不使用该接入网络分流 IP数据; 否则, UE 使用该接入网络执行 IFOM。
情况三、 在 ANDSF策略的 ANDI中增加表示接入网络拥塞信息 的信息元,具体在 ANDI的 AccessNetworklnformationRef 中增力口信息 元, 具体地, AccessNetworklnformationRef 中增力口的信息元与接入网 络的具体类型相关, 如图 10所示, 为对于 WiMAX接入网络, 增加 了信息元的 ANDI 的具体格式示意图, 其中, Congestion Indication 为新增的信息元。
当然, 在实际应用中, 上述情况一、 情况二和情况三还可以结合 起来使用, 即 ANDSF策略中, 可以在 ISMP、 ISRP和 ANDI的一个 或多个中增加拥塞信息, 相应处理本发明实施例中不再赘述。
实施例二
基于与上述方法同样的发明构思,本发明实施例中还提供了一种 接入网发现和选择功能 ANDSF实体, 如图 11所示, 该 ANDSF实体 包括:
获得模块 11 , 用于获得接入网络的拥塞信息。
所述获得模块 11 , 具体用于从与网络交互的信息中获得所述拥 塞信息; 或者, 通过运营商的配置获得所述拥塞信息。 发送模块 12,用于通过 ANDSF策略消息将所述拥塞信息通知给 用户设备。 所述 ANDSF策略消息中设置有表示拥塞信息的信息元, 所述信息元用于承载所述拥塞信息;且所述信息元的不同取值表示不 同的拥塞程度。
本发明实施例中, 所述发送模块 12, 具体用于当接入网络的拥 塞信息发生变化时, 通过 ANDSF策略消息将变化后的拥塞信息通知 给所述用户设备;或者,当接收到所述用户设备的请求策略的消息时, 通过 ANDSF策略消息将当前的拥塞信息通知给所述用户设备。
本发明实施例中, 所述 ANDSF策略消息包括以下一种或几种: 基于 ANDSF策略的跨***的移动性策略 ISMP消息; 基于 ANDSF 策略的跨***路由策略 ISRP消息; 基于 ANDSF策略的接入网络发 现信息 ANDI消息。
其中,本发明装置的各个模块可以集成于一体,也可以分离部署。 上述模块可以合并为一个模块, 也可以进一步拆分成多个子模块。
实施例三
基于与上述方法同样的发明构思,本发明实施例中还提供了一种 用户设备, 如图 12所示, 该用户设备包括:
接收模块 21 ,用于接收接入网发现和选择功能 ANDSF实体通过 ANDSF策略消息通知的接入网络的拥塞信息。
所述接收模块 21 , 具体用于当接入网络的拥塞信息发生变化时, 接收所述 ANDSF实体通过 ANDSF策略消息通知的变化后的拥塞信 息; 或者, 在向所述 ANDSF实体发送请求策略的消息后, 接收所述 ANDSF实体通过 ANDSF策略消息通知的当前的拥塞信息。
获得模块 22,用于从所述 ANDSF策略消息中获得所述拥塞信息。 本发明实施例中, 所述 ANDSF策略消息中设置有表示拥塞信息 的信息元, 所述信息元用于承载所述拥塞信息; 且所述信息元的不同 取值表示不同的拥塞程度。
本发明实施例中, 所述获得模块 22, 具体用于从所述 ANDSF策 略消息的信息元中获得所述拥塞信息。 本发明实施例中, 所述 ANDSF策略消息包括以下一种或几种: 基于 ANDSF策略的跨***的移动性策略 ISMP消息; 基于 ANDSF 策略的跨***路由策略 ISRP消息; 基于 ANDSF策略的接入网络发 现信息 ANDI消息。
其中,本发明装置的各个模块可以集成于一体,也可以分离部署。 上述模块可以合并为一个模块, 也可以进一步拆分成多个子模块。
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, 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计算机设备(可以是个人计算机, 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。
本领域技术人员可以理解附图只是一个优选实施例的示意图,附 图中的模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的模块可以按照实 施例描述进行分布于实施例的装置中,也可以进行相应变化位于不同 于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个 模块, 也可以进一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。 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
1、 一种拥塞信息的通知方法, 其特征在于, 包括:
接入网发现和选择功能 ANDSF实体获得接入网络的拥塞信息; 所述 ANDSF实体通过 ANDSF策略消息将所述拥塞信息通知给 用户设备。
2、 如权利要求 1所述的方法, 其特征在于, 所述接入网发现和 选择功能 ANDSF实体获得接入网络的拥塞信息, 包括:
所述 ANDSF实体从与网络交互的信息中获得所述拥塞信息; 或 者,
所述 ANDSF实体通过运营商的配置获得所述拥塞信息; 或者, 所述 ANDSF实体通过之前与用户设备 UE的交互获得所述拥塞 信息。
3、 如权利要求 1所述的方法, 其特征在于, 所述 ANDSF策略 消息中设置有表示拥塞信息的信息元,且所述信息元用于承载所述拥 塞信息。
4、 如权利要求 3所述的方法, 其特征在于, 所述信息元的不同 取值表示不同的拥塞程度。
5、 如权利要求 1所述的方法, 其特征在于, 所述 ANDSF实体 通过 ANDSF策略消息将所述拥塞信息通知给用户设备, 包括: 当接入网络的拥塞信息发生变化时, 所述 ANDSF 实体通过 ANDSF策略消息将变化后的拥塞信息通知给所述用户设备; 或者, 当所述 ANDSF实体接收到所述用户设备的请求策略的消息时, 所述 ANDSF实体通过 ANDSF策略消息将当前的拥塞信息通知给所 述用户设备。
6、 如权利要求 1、 3、 5中任一项所述的方法, 其特征在于, 所 述 ANDSF策略消息包括以下一种或几种:
基于 ANDSF策略的跨***的移动性策略 ISMP消息;
基于 ANDSF策略的跨***路由策略 ISRP消息; 基于 ANDSF策略的接入网络发现信息 ANDI消息。
7、 一种拥塞信息的通知方法, 其特征在于, 包括:
用户设备接收接入网发现和选择功能 ANDSF实体通过 ANDSF 策略消息通知的接入网络的拥塞信息;
所述用户设备从所述 ANDSF策略消息中获得所述拥塞信息。
8、 如权利要求 7所述的方法, 其特征在于, 所述用户设备接收 接入网发现和选择功能 ANDSF实体通过 ANDSF策略消息通知的接 入网络的拥塞信息, 包括:
当接入网络的拥塞信息发生变化时, 所述用户设备接收所述 ANDSF实体通过 ANDSF策略消息通知的变化后的拥塞信息; 或者, 在所述用户设备向所述 ANDSF实体发送请求策略的消息后, 所 述用户设备接收所述 ANDSF实体通过 ANDSF策略消息通知的当前 的拥塞信息。
9、 如权利要求 7或 8所述的方法, 其特征在于, 所述 ANDSF 策略消息中设置有表示拥塞信息的信息元,且所述信息元用于承载所 述拥塞信息。
10、 如权利要求 9所述的方法, 其特征在于, 所述信息元的不同 取值表示不同的拥塞程度。
11、 如权利要求 9所述的方法, 其特征在于, 所述用户设备从所 述 ANDSF策略消息中获得所述拥塞信息, 包括:
所述用户设备从所述 ANDSF策略消息的信息元中获得所述拥塞 信息。
12、 如权利要求 7或 8所述的方法, 其特征在于, 所述 ANDSF 策略消息包括以下一种或几种:
基于 ANDSF策略的跨***的移动性策略 ISMP消息;
基于 ANDSF策略的跨***路由策略 ISRP消息;
基于 ANDSF策略的接入网络发现信息 ANDI消息。
13、 一种接入网发现和选择功能 ANDSF实体, 其特征在于, 包 括: 获得模块, 用于获得接入网络的拥塞信息;
发送模块, 用于通过 ANDSF策略消息将所述拥塞信息通知给用 户设备。
14、 如权利要求 13所述的 ANDSF实体, 其特征在于, 所述获得模块,具体用于从与网络交互的信息中获得所述拥塞信 息; 或者, 通过运营商的配置获得所述拥塞信息; 或者通过之前与用 户设备 UE的交互获得所述拥塞信息。
15、 如权利要求 13所述的 ANDSF实体, 其特征在于, 所述发送模块, 具体用于当接入网络的拥塞信息发生变化时, 通 过 ANDSF策略消息将变化后的拥塞信息通知给所述用户设备;或者, 当接收到所述用户设备的请求策略的消息时, 通过 ANDSF策略 消息将当前的拥塞信息通知给所述用户设备。
16、 一种用户设备, 其特征在于, 包括:
接收模块, 用于接收接入网发现和选择功能 ANDSF 实体通过 ANDSF策略消息通知的接入网络的拥塞信息;
获得模块, 用于从所述 ANDSF策略消息中获得所述拥塞信息。
17、 如权利要求 16所述的用户设备, 其特征在于,
所述接收模块, 具体用于当接入网络的拥塞信息发生变化时,接 收所述 ANDSF实体通过 ANDSF策略消息通知的变化后的拥塞信息; 或者,
在向所述 ANDSF实体发送请求策略的消息后,接收所述 ANDSF 实体通过 ANDSF策略消息通知的当前的拥塞信息。
18、 如权利要求 16所述的用户设备, 其特征在于,
所述获得模块, 具体用于从所述 ANDSF策略消息的信息元中获 得所述拥塞信息。
PCT/CN2012/081352 2011-11-02 2012-09-13 一种拥塞信息的通知方法和设备 WO2013063984A1 (zh)

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