WO2007025449A1 - Procede de revocation de ressource basee sur le sous-systeme de controle d'admission de ressource et dispositif reseau pour celle-ci - Google Patents

Procede de revocation de ressource basee sur le sous-systeme de controle d'admission de ressource et dispositif reseau pour celle-ci Download PDF

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Publication number
WO2007025449A1
WO2007025449A1 PCT/CN2006/001969 CN2006001969W WO2007025449A1 WO 2007025449 A1 WO2007025449 A1 WO 2007025449A1 CN 2006001969 W CN2006001969 W CN 2006001969W WO 2007025449 A1 WO2007025449 A1 WO 2007025449A1
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Prior art keywords
resource
function entity
service
entity
notification
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PCT/CN2006/001969
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English (en)
French (fr)
Inventor
Zhenjian Zheng
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Huawei Technologies Co., Ltd.
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Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to CN2006800122638A priority Critical patent/CN101160829B/zh
Publication of WO2007025449A1 publication Critical patent/WO2007025449A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic control in data switching networks
    • H04L47/70Admission control; Resource allocation
    • H04L47/82Miscellaneous aspects
    • H04L47/824Applicable to portable or mobile terminals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic control in data switching networks
    • H04L47/70Admission control; Resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic control in data switching networks
    • H04L47/70Admission control; Resource allocation
    • H04L47/74Admission control; Resource allocation measures in reaction to resource unavailability
    • H04L47/745Reaction in network

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a resource revocation method and a network device based on a resource admission control subsystem.
  • broadband multimedia services including rich video/audio (video/audio) streaming, video on demand (VOD, Video on Demand), video multicast, multimedia interaction, high bandwidth for ordinary residential users Demanding online games, providing video conferencing, distance education, virtual private networks (VPNs), QoS-guaranteed data lines, and IP Hotel (digital hotels) for commercial users have become important contents of broadband operations.
  • video/audio video/audio
  • VOD video on demand
  • VOD Video on Demand
  • video multicast multimedia interaction
  • high bandwidth for ordinary residential users Demanding online games providing video conferencing, distance education, virtual private networks (VPNs), QoS-guaranteed data lines, and IP Hotel (digital hotels) for commercial users have become important contents of broadband operations.
  • VPNs virtual private networks
  • QoS-guaranteed data lines and IP Hotel (digital hotels) for commercial users have become important contents of broadband operations.
  • IP Hotel digital hotels
  • Ethernet technology has become one of the main technologies for building a triple play and metropolitan area network in the future.
  • the Ethernet service will have a great development in the future market.
  • NGN Next
  • the resource admission control subsystem (RACS, Resource) is introduced between the application layer and the transport layer.
  • Admission Control Sub-system which is used to uniformly manage the resources of the bearer network and provides policy-based control, including QoS of the bearer network and Network Address Translation (NAT) for access and control through the RACS.
  • the RACS architecture defined in TISPAN is shown in Figure 1.
  • the RACS mainly includes: an application function entity (AF), a service-based policy decision function (SPDF) 120, and a border gateway function.
  • AF application function entity
  • SPDF service-based policy decision function
  • BGF Border Gateway Function
  • A-RACF Access-Resource and Admission Control Function
  • RCEF Resource Control Enforcement Function
  • NAPT Network Address Port Translation
  • the existing resource revocation process can be initiated by the Network Attachment Subsystem (NASS) or RCEF.
  • NASS Network Attachment Subsystem
  • the main processing procedure of the NASS initiating resource revocation in the prior art is as follows: (201)
  • the NASS determines that a bearer path is released, for example, the user terminal device requests the NASS to release the bearer path.
  • the NASS notifies the A-ACF to remove the access information and sends an IP-Connectivity-Release-Indication to notify the A-RACF access network that the information is invalid.
  • A-RACF needs to reclaim all relevant resources, send a resource reservation revocation request, and notify SPDF to revoke resource reservation.
  • SPDF notification AF revokes resource reservation and sends resource reservation revocation request.
  • A_RACF checks if the policy installed to the RCEF needs to be reclaimed. If yes (ie, the policy has been installed to the RCEF), proceed to step (206); otherwise, end.
  • A_RACF notifies the RCEF recovery policy to send a RCEF service resource release request. (207) The RCEF reclaims the policy and returns the execution result, sending an RCEF service resource release confirmation.
  • the main processing flow of the RCEF initiating resource revocation in the prior art is as follows: (301) The RCEF determines that an installed policy is invalid, such as an internal fault.
  • the RCEF notifies the A-RACF policy of invalidation through the Event Notify event.
  • A-RACF needs to reclaim all relevant resources, issue a resource reservation revocation request, and notify SPDF to revoke resource reservation.
  • SPDF issues a resource reservation revocation request to AF, reporting the revocation of resource reservation.
  • the above two resource recycling processes have some shortcomings: in the existing RACS architecture, if a call has requested service resources (such as NAT translation) from the BGF, if the NASS or RCEF initiates resource revocation for some reason, it will lead to BGF. The business resources cannot be recycled and waste network resources.
  • the invention provides a resource revocation method and a network device based on the resource admission control subsystem, which can timely recover the service resources allocated by the BGF when the resource is revoked.
  • a resource revocation method based on a resource admission control subsystem comprising the following steps: The service-based policy determines that the function entity receives the notification of revoking the resource reservation;
  • the service-based policy decision function entity Upon detecting that the border gateway functional entity has allocated a service resource for the session, the service-based policy decision function entity notifies the border gateway function entity to release and reclaim the service resource allocated for the session.
  • the method further includes: the border gateway function entity returning an execution result to the service-based policy decision function entity.
  • the context detection boundary gateway function entity generated when the resource is requested by the application function entity carried in the notification is configured to allocate the service resource to the session.
  • the service-based policy determining function entity detects, when receiving the revocation resource reservation notification, the boundary gateway function entity according to the information generated when the locally recorded application function entity requests the resource Whether a business resource has been allocated for the session.
  • the information generated when the application function entity requests the resource is the identification information of the border gateway function entity.
  • the service-based policy determines that the notification of the revocation resource reservation received by the functional entity comes from the access layer resource admission control function entity.
  • the method further includes: the access layer resource admission control function entity checks whether a policy that has been installed to the resource control implementation function entity needs to be reclaimed, and notifies the resource control implementation function entity to reclaim the policy when needed.
  • the method further includes: the resource control implementation function entity returns an execution result to the access layer resource admission control function entity.
  • the method further includes: triggering, by the network attachment subsystem or the resource control implementation function entity, the related event of the revocation resource reservation.
  • the method further includes: the service-based policy determining function entity notifying the application function entity to revoke the resource reservation.
  • a network device including:
  • a processing unit for receiving an undo resource reservation indication
  • a determining unit for determining whether a border gateway function entity needs to release and reclaim service resources according to an undo resource reservation indication output by the processing unit;
  • a second notification unit for notifying the border gateway function entity when the determining unit determines that the border gateway function entity is required to release and reclaim the service resource.
  • the determining unit includes: a context parsing unit, configured to parse a context generated when an application function entity carried in the notification of the revocation resource reservation of the access layer resource admission control function entity requests the resource;
  • a determining unit configured to determine, according to the parsing result of the context parsing unit, whether the border gateway functional entity allocates a service resource to the session.
  • the determining unit includes: a record information query unit, configured to query a local record application Information generated when a functional entity requests a resource;
  • a detecting unit configured to detect, according to the query result of the record information query unit, whether the border gateway function entity allocates a service resource for the session.
  • the device further includes: a first notification unit configured to notify the application function entity to revoke the resource reservation according to the revocation resource reservation indication.
  • the invention can notify the BGF to reclaim the service resources in time when the SPDF receives the resource revocation indication, and avoids not reporting the BGF release service resources when the session service applies for the BGF resources in the prior art, and the resources cannot be recovered in time.
  • the problem; therefore, the use of the present invention can improve the rational utilization of resources.
  • FIG. 1 is a schematic diagram of a RACS architecture in the prior art
  • FIG. 2 is a flow chart of processing a resource revocation initiated by a NASS in the prior art
  • FIG. 3 is a flowchart of a process for initiating resource revocation by a RCEF in the prior art
  • FIG. 4 is a process flow diagram of an embodiment of NASS initiating resource revocation according to the present invention
  • FIG. 5 is a flowchart of another embodiment of NASS initiating resource revocation in the present invention
  • FIG. 6 is a RCEF initiated resource revocation in the present invention
  • FIG. 7 is a flowchart of a process of another embodiment of RCEF initiating resource revocation in the present invention
  • FIG. 8 is a block diagram of an embodiment of the apparatus of the present invention.
  • the Boundary Gateway Functional Entity that has allocated the service resources (such as NAT translation) to the call can be timely Recovering the service resource
  • the present invention determines whether the BGF allocates a service resource for the session by the service-based policy decision function entity (SPDF), and notifies the BGF to release and recycle the service resource when determining that the BGF has allocated the service resource for the session.
  • SPDF service-based policy decision function entity
  • the A-RACF includes a resource-related context in the notification message sent to the SPDF, which is generated during the process of the AF requesting resources from the SPDF, and is stored in an entity such as AF and A-RACF.
  • the SPDF allocates business resources according to the policy selection BGF, it is recorded in the context. Record relevant information. Therefore, if the A-RACF carries the BGF information in the resource reservation revocation request message, the SPDF can determine whether the BGF entity allocates the service resource for the session according to the related information in the context.
  • the SPDF selects the BGF information directly after the BGF is selected, so that the A-RACF does not need to carry the BGF information in the resource reservation revocation request message, and the SPDF directly determines the BGF according to the local record. Whether a business resource has been allocated for the session.
  • Step 401 The NASS determines that a bearer path is released, for example, the user terminal device requests the NASS to release the bearer path.
  • Step 402 The NASS sends an IP-Connectivity-Release-Indication to notify the A-RACF access network that the information is invalid.
  • Step 403 The A-RACF needs to reclaim all related resources, and reserve a Revoke Reservation request message to the SPDF for the corresponding session, where the request message includes corresponding context information.
  • Step 404 The SPDF sends a resource reservation revocation request message to the AF for the session.
  • Step 405 The A-RACF checks whether it is necessary to recycle the policy installed to the RCEF. If yes, proceed to step 408 after performing steps 406 and 407; otherwise, proceed directly to step 408.
  • A-RACF is based on local policies and comes from
  • the user access information of the NASS determines whether it is required to request a service resource from the RCEF, selects an RCEF when needed, and requests a service resource from the RCEF, and locally records the information of the RCEF entity, so that when released, the RCEF can be locally recorded.
  • the information determines whether the RCEF entity needs to be notified of the recycling policy.
  • Step 406 The A-RACF notifies the RCEF recovery policy.
  • Step 407 The RCEF reclaims the policy and returns the execution result.
  • Step 408 The SPDF checks whether the BGF needs to release the service resource according to the information in the context, that is, whether the BGF has allocated the service resource for the session. If yes, step 409 is performed; if it is determined that the BGF is not required to release the service resource, the process of canceling the resource is ended. Step 409: The SPDF sends a service resource release request to the BGF, requesting the BGF to release the service resource allocated for the session.
  • Step 410 The BGF recovers the resource and returns a confirmation message to the SPDF to inform the execution result.
  • the flow of resource revocation initiated by the NASS is not limited to the above process, and may be the process shown in FIG. 5, first performing step 507 (detecting BGF), and then performing step 510 (notifying AF) o detecting BGF.
  • the order of the notifications F does not affect the implementation of the present invention, but the same point is that the SPDF must further determine whether the BGF needs to release the service resources.
  • the A-RACF check whether it is necessary to recycle the policy of installing RCEF (step 405 or step 503) and detecting the order of BGF (step 408 or step 507) does not affect the implementation of the present invention, and thus will not be described again.
  • Step 601 The RCEF determines that an installed policy is invalid, such as an internal fault.
  • Step 602 The RCEF notifies the A-RACF policy of failure by using an Event Notify event.
  • Step 603 The A-RACF needs to recover all related resources, and sends a resource reservation revocation request to the SPDF, where the request includes corresponding context information.
  • Step 604 The SPDF sends a resource reservation revocation request to the AF.
  • Step 605 The SPDF detects whether the BGF needs to release the service resource, and if yes, proceeds to step 606; otherwise, ends the process of revoking the resource.
  • Step 606 The SPDF sends a release service resource request message to the BGF.
  • Step 607 The BGF recovers the resource, and returns a confirmation message to the SPDF to inform the execution result.
  • the process of resource revocation initiated by the RCEF entity is not limited to the above process, and may be a process as shown in FIG. ,.
  • step 704 detecting BGF
  • step 707 notification AF
  • the order of detecting BGF and notifying AF does not affect the implementation of the present invention, but the same point is that SPDF must further determine whether BGF needs to release service resources.
  • the SPDF 50 includes a processing unit 500, a first notification unit 511, a determination unit 520, and a second notification unit 530.
  • the processing unit 500 is configured to receive a resource reservation revocation request and perform various processes required for completing other existing basic functions.
  • the first notification unit 511 has a logical connection relationship with the processing unit 500, and is configured to notify the AF to cancel the resource reservation according to the resource reservation revocation indication.
  • the determining unit 520 has a logical connection relationship with the processing unit 500, and is used to determine whether the BGF is required to release and reclaim the service resources according to the revocation resource reservation indication triggered by the NASS or the RCEF.
  • the second notification unit 530 has a logical connection relationship with the judging unit, and is configured to notify the BGF when the judging unit 520 determines that the BGF is required to be released and the service resource is reclaimed.
  • the second notification unit 530 can be included in the first notification unit 511, that is, the two are integrated.
  • the SPDF can be a single physical device or can be included as a logical functional entity in other physical devices.
  • the determining unit 520 includes a context parsing unit and a discriminating unit, where the context parsing unit is configured to parse a context generated when the AF request resource carried in the notification of the revocation resource reservation from the A-RACF is The determining unit is configured to determine, according to the parsing result, whether the BGF allocates a service resource to the session.
  • the determining unit 520 includes a record information query unit and a detecting unit, where the record information query unit is configured to query information generated when the device locally records the AF request resource, and the determining unit is configured to perform the query according to the query. As a result, it is detected whether the BGF allocates a service resource for the session. It is within the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention.

Description

基于资源准入控制子系统的资源撤销方法及网络设备 技术领域
本发明涉及通信技术领域, 尤其涉及基于资源准入控制子系统的资 源撤销方法及网络设备。
背景技术 随着 Internet (互联网)规模的不断增大, 各种各样的网络服务争相 涌现,先进的多媒体通信系统层出不穷。 由于实时业务对网络传输时延、 延时抖动等特性较为敏感, 当网络上有突发性高的文件传输协议 ( FTP, File Transfer Protocol )或者含有图像文件的超文本传输协议 ( HTTP, Hyper Text Transfer Protocol )等业务时, 实时业务就会受到很大影响; 另一方面, 由于多媒体业务占去大量的带宽, 现有网络要保证的关键业 务就难以得到可靠的传输。于是,各种服务盾量( QoS, Quality of Service ) 技术应运而生。 IETF ( Internet Engineering Task Force, 互联网工程任务 组) 已经建议很多服务模型和机制, 以满足 QoS的需求。
基于门户的多种应用和服务以及宽带多媒体业务, 包括为普通住宅 用户提供丰富的 Video/Audio (视频 /音频)流、 视频点播 ( VOD, Video on Demand ), 视频组播、 多媒体交互、 高带宽需求的网络游戏, 为商业 用户提供视频会议、 远程教育、 虚拟专用网 (VPN, Virtual Private Network )、 具有 QoS保障的数据专线、 IP Hotel (数字化酒店)等, 已 成为宽带运营的重要内容。
运营商和企事业用户对以太网技术和端对端以太网技术有较高的认 知程度。 以太网技术成为未来搭建三网合一、 城域网的主要技术之一, 以太网业务在未来市场将会有较大的发展。 针对这些状况, ETSI ( European Telecommunications Standards Institute, 欧洲电信标准学会 ) 的 TISPAN ( Telecommunications and Internet converged Services and Protocols for Advanced Networking ,电信和互联网融合业务及高级网给协 议)的分组网络架构, 即 NGN ( Next Generation Network, 下一代网絡) 中,在应用层和传送层之间引入了资源准入控制子系统( RACS, Resource Admission Control Sub-system ), 用于统一管理承载网的资源 , 并提供基 于策略的控制,包括承载网的 QoS、网络地址转换 ( NAT, Network Address Translation )都经过 RACS来进行访问和控制。
TISPAN中定义的 RACS架构如图 1所示, 其中 RACS主要包括: 应用功能实体(AF, Application Function ) 110、 基于业务的策略决定功 能实体(SPDF, Service-based Policy Decision Function ) 120、 边界网关 功能实体(BGF, Border Gateway Function ) 130、 接入层资源准入控制 功能实体 ( A-RACF , Access- Resource and Admission Control Function ) 140 和资源控制实施功能实体(RCEF, Resource Control Enforcement Function ) 150, RACS和相关功能实体的关系和接口亦可参阅图 1。
其中, 网络地址端口转换 ( NAPT , Network Address and Port Translation )的控制主要通过 AF 110、 SPDF 120和 BGF 130之间的交互 进行; A-RACF 140和 RCEF 150主要用于接入层 QoS资源的控制。
在上述的 RACS架构中, 当一个承载路径被释放或已安装的策略失 效等情况下, 需要回收相关的资源。 现有的资源撤销过程可以由网络附 着子系统(NASS, Network Attachment Subsystem )或者 RCEF发起。
请参阅图 2,现有技术中 NASS发起资源撤销的主要处理流程如下: ( 201 ) NASS决定一个承载路径被释放, 如用户终端设备向 NASS 请求释放承载路径。
( 202 ) NASS通知 A- ACF移除接入信息, 发送 IP连通性释放指 示( IP-Connectivity-Release-Indication ), 通知 A-RACF接入网信息失效。
( 203 ) A-RACF需要回收所有相关资源, 发送资源预留撤销请求, 通知 SPDF撤销资源预留。
( 204 ) SPDF通知 AF撤销资源预留, 发送资源预留撤销请求。 ( 205 )A_RACF检查是否需要回收安装给 RCEF的策略,如果是(即 已向 RCEF安装过策略), 则进行步骤(206 ); 否则, 结束。
( 206 ) A_RACF通知 RCEF回收策略,发送 RCEF业务资源释放请 求。 ( 207 ) RCEF回收策略并返回执行结果, 发送 RCEF业务资源释放 确认。
请参阅图 3, 现有技术中 RCEF发起资源撤销的主要处理流程如下: ( 301 ) RCEF确定一个已安装的策略失效, 如内部故障。
( 302 ) RCEF通过 Event Notify事件通知 A-RACF策略失效。
( 303 ) A-RACF需要回收所有相关资源, 发出资源预留撤销请求, 通知 SPDF撤销资源预留。
( 304 ) SPDF向 AF发出资源预留撤销请求, 报告撤销资源预留。 上述两个资源回收的流程存在一些不足之处:在现有 RACS架构中, 如果一次呼叫已向 BGF请求业务资源(如 NAT转换),若 NASS或 RCEF 由于某种原因发起资源撤销,将导致 BGF的业务资源不能得以回收而浪 费网絡资源。
发明内容
本发明提供一种基于资源准入控制子系统的资源撤销方法及网络设 备, 可以在资源撤销时及时回收 BGF分配的业务资源。
本发明提供以下技术方案:
一种基于资源准入控制子系统的资源撤销方法, 包括如下步骤: 基于业务的策略决定功能实体接收撤销资源预留的通知;
在检测到边界网关功能实体为会话分配过业务资源时, 所述基于业 务的策略决定功能实体通知所述边界网关功能实体释放并回收为所述会 话分配的业务资源。
还包括: 所述边界网关功能实体向基于业务的策略决定功能实体返 回执行结果。
所述基于业务的策略决定功能实体接收到撤销资源预留的通知时 , 根据该通知中携带的应用功能实体请求资源时生成的上下文检测边界网 关功能实体是否为会话分配有业务资源。
所述基于业务的策略决定功能实体在收到撤销资源预留通知时根据 本地记录的应用功能实体请求资源时生成的信息检测边界网关功能实体 是否为会话分配过业务资源。
所述应用功能实体请求资源时生成的信息为边界网关功能实体的标 识信息。
所述基于业务的策略决定功能实体接收的撤销资源预留的通知来自 接入层资源准入控制功能实体。
还包括: 所述接入层资源准入控制功能实体检查是否需要回收已安 装给资源控制实施功能实体的策略, 并在需要时通知资源控制实施功能 实体回收策略。
还包括: 资源控制实施功能实体向接入层资源准入控制功能实体返 回执行结果。
所述基于业务的策略决定功能实体接收撤销资源预留的通知之前, 还包括: 由网络附着子系统或资源控制实施功能实体触发所述撤销资源 预留的相关事件。
所述基于业务的策略决定功能实体接收撤销资源预留的通知后, 还 包括: 所述基于业务的策略决定功能实体通知应用功能实体撤销资源预 留。
一种网络设备, 包括:
用于接收撤销资源预留指示的处理单元;
用于根据所述处理单元输出的撤销资源预留指示确定是否需要边界 网关功能实体释放并回收业务资源的判断单元; 以及
用于在所述判断单元确定需要边界网关功能实体释放并回收业务资 源时通知边界网关功能实体的第二通知单元。
所述判断单元包括: 上下文解析单元, 用于解析来自接入层资源准 入控制功能实体的撤销资源预留的通知中携带的应用功能实体请求资源 时生成的上下文;
判别单元, 用于才艮据所述上下文解析单元的解析结果确定边界网关 功能实体是否为会话分配有业务资源。
所述判断单元: 包括记录信息查询单元, 用于查询本地记录的应用 功能实体请求资源时生成的信息;
检测单元, 用于根据所述记录信息查询单元的查询结果检测边界网 关功能实体是否为会话分配过业务资源。
该设备还包括: 用于根据撤销资源预留指示通知应用功能实体撤销 资源预留的第一通知单元。
本发明在 RACS架构下, 当 SPDF接收资源撤销指示时能够及时通 知 BGF回收业务资源, 避免了现有技术中在会话业务申请了 BGF资源 的情况下不通知 BGF释放业务资源, 导致资源不能及时回收的问题; 因 此, 采用本发明能够提高资源的合理利用率。
附图说明 图 1为现有技术中 RACS架构的示意图;
图 2为现有技术中 NASS发起资源撤销的处理流程图;
图 3为现有技术中 RCEF发起资源撤销的处理流程图;
图 4为本发明中 NASS发起资源撤销的一实施例的处理流程图; 图 5为本发明中 NASS发起资源撤销的另一实施例的处理流程图; 图 6为本发明中 RCEF发起资源撤销的一实施例的处理流程图; 图 7为本发明中 RCEF发起资源撤销的另一实施例的处理流程图; 图 8为本发明的装置的实施例的框图。
具体实施方式
为了在网络附着子系统 ( NASS )或资源控制实施功能( RCEF )触 发与撤销资源预留相关的事件时,使已向呼叫分配业务资源(如 NAT转 换) 的边界网关功能实体 ( BGF ) 能够及时回收该业务资源, 本发明由 基于业务的策略决定功能实体(SPDF )对 BGF是否为会话分配业务资 源进行判断, 并在确定 BGF已为会话分配过业务资源时通知 BGF释放 并回收该业务资源。
A-RACF在下发给 SPDF的通知消息中包含有与资源相关的上下文, 该上下文在 AF向 SPDF请求资源的过程中生成,并保存在 AF和 A-RACF 等实体上。 在 SPDF根据策略选择 BGF分配业务资源时, 在上下文中记 录相关信息。 因此, 如果 A-RACF在资源预留撤销请求消息中携带 BGF 信息, SPDF可根据该上下文中的相关信息判断 BGF实体是否为会话分 配过业务资源。
另夕卜, 可以在 AF请求资源时, SPDF选择 BGF后直接在本地记录 该 BGF信息, 这样 A-RACF就不需要在资源预留撤销请求消息中携带 BGF信息, SPDF直接根据本地的记录判断 BGF是否为会话分配过业务 资源。
参阅图 4所示, NASS发起资源撤销的一个实施例的主要处理流程 如下:
步骤 401、NASS决定一个承载路径被释放,如用户终端设备向 NASS 请求释放承载路径。
步 骤 402 、 NASS 发 送 一 个 IP 连 通 性释放指 示 ( IP-Connectivity-Release- Indication ) , 通知 A-RACF接入网信息失效。
步驟 403、 A-RACF需要回收所有相关资源,针对相应的会话向 SPDF 发送资源预留 4款销 (Revoke Reservation )请求消息, 该请求消息中包含 对应的上下文信息。
步骤 404、 SPDF针对所述会话向 AF发送资源预留撤销请求消息。 步骤 405、 A-RACF检查是否需要回收安装给 RCEF的策略, 如果 是, 则进行步骤 406和 407之后进行步驟 408; 否则直接进行步竦 408。
检查的方式有多种, 如在请求资源时 A-RACF依据本地策略及来自
NASS的用户接入信息判断是否需要向 RCEF请求业务资源, 在需要时 选择一个 RCEF, 并向该 RCEF请求业务资源, 同时本地记录该 RCEF 实体的信息, 这样在释放时, 可以依据本地记录的 RCEF信息判断是否 需要通知 RCEF实体回收策略。
步骤 406、 A-RACF通知 RCEF回收策略。
步驟 407、 RCEF回收策略并返回执行结果。
步骤 408、 SPDF根据上下文中的信息检查是否需要 BGF释放业务 资源, 即 BGF是否已为会话分配业务资源。 如果是, 则执行步骤 409; 如果确定不需要 BGF释放业务资源, 则结束撤销资源的处理流程。 步驟 409、 SPDF向 BGF发送业务资源释放请求, 请求 BGF释放为 会话分配的业务资源。
步骤 410、 BGF回收资源, 并向 SPDF返回确认消息以告知执行结 果。
在本发明中, NASS发起的资源撤销的流程并不限于上述流程, 也 可以是如图 5所示的流程, 先进行步骤 507 (检测 BGF ), 再进行步骤 510 (通知 AF )o 即检测 BGF和通知 F的先后顺序并不影响本发明的 实现, 但相同点在于, SPDF必须要进一步确定是否需要 BGF释放业务 资源。
此外, A-RACF检查是否需要回收安装给 RCEF的策略(步骤 405 或步骤 503 )和检测 BGF (步驟 408或步骤 507 ) 的先后顺序也不影响 本发明的实现, 此不赘述。
参阅图 6所示, RCEF发起资源撤销的一个实施例的主要处理过程 如下:
步驟 601、 RCEF确定一个已安装的策略失效, 如内部故障。
步骤 602、 RCEF通过 Event Notify事件通知 A-RACF策略失效。 步骤 603、 A-RACF需要回收所有相关资源, 向 SPDF发送资源预留 撤销请求, 该请求中包含对应的上下文信息。
步骤 604、 SPDF向 AF发送资源预留撤销请求。
步骤 605、 SPDF检测是否需要 BGF释放业务资源, 如果是, 则进 行步骤 606; 否则, 结束撤销资源的处理。
步骤 606、 SPDF向 BGF发送释放业务资源请求消息。
步驟 607、 BGF回收资源, 并向 SPDF返回确认消息以告知执行结 果。
在本发明中, RCEF实体发起的资源撤销的流程并不限于上述流程, 也可以是如图 Ί所示的流程, 先进行步骤 704 (检测 BGF ), 再进行步骤 707 (通知 AF )。 即检测 BGF和通知 AF的先后顺序并不影响本发明的 实现, 但相同点在于, SPDF必须要进一步确定是否需要 BGF释放业务 资源。 参阅图 8所示, 本发明装置的一个实施例中, SPDF50 包括处理单 元 500、 第一通知单元 511、 判断单元 520和第二通知单元 530。 其中: 处理单元 500, 用于接收资源预留撤销请求及完成其他现有基本功 能所需的各项处理。
第一通知单元 511 , 与处理单元 500具有逻辑上的连接关系, 用于 根据资源预留撤销指示通知 AF撤销资源预留。
判断单元 520, 与处理单元 500具有逻辑上的连接关系, 用于根据 NASS或 RCEF触发的撤销资源预留指示确定是否需要 BGF释放并回收 业务资源。
第二通知单元 530, 与判断单元具有逻辑上的连接关系, 用于在所 述判断单元 520确定需要 BGF释放并回收业务资源时通知 BGF。
在 SPDF的实施例的功能结构中, 第二通知单元 530可包含在第一 通知单元 511内, 即两者为一体结构。
在本发明中, SPDF 可为一单独的物理设备, 也可作为一个逻辑功 能实体包含在其他物理设备中。
其中, 一个实施例中, 所述判断单元 520包括上下文解析单元和判 别单元, 所述上下文解析单元用于解析来自 A-RACF的撤销资源预留的 通知中携带的 AF请求资源时生成的上下文, 所述判别单元用于根据解 析结果确定 BGF是否为会话分配有业务资源。
另一个实施例中, 所述判断单元 520包括记录信息查询单元和检测 单元, 所述记录信息查询单元用于查询该装置本地记录的 AF请求资源 时生成的信息,所述判别单元用于根据查询结果检测 BGF是否为会话分 配过业务资源。 离本发明的精神和范围。 这样, 倘若对本发明的这些修改和变型属于本 发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动 和变型在内。

Claims

权 利 要 求
1、 一种基于资源准入控制子系统的资源措 t销方法, 其特征在于, 包 括:
基于业务的策略决定功能实体接收撤销资源预留的通知; 在检测到边界网关功能实体为会话分配过业务资源时, 所述基于业 务的策略决定功能实体通知所述边界网关功能实体释放并回收为所述会 话分配的业务资源。
2、 如权利要求 1所述的方法, 其特征在于, 还包括: 所述边界网关 功能实体向基于业务的策略决定功能实体返回执行结果。
3、如权利要求 1所述的方法, 其特征在于, 所述基于业务的策略决 定功能实体接收到撤销资源预留的通知时 , 根据该通知中携带的应用功 能实体请求资源时生成的上下文检测边界网关功能实体是否为会话分配 有业务资源。
4、如权利要求 1所述的方法, 其特征在于, 所述基于业务的策略决 定功能实体在收到撤销资源预留通知时, 根据本地记录的应用功能实体 请求资源时生成的信息检测边界网关功能实体是否为会话分配过业务资 源。
5、 如权利要求 4所述的方法, 其特征在于, 所述应用功能实体请求 资源时生成的信息为边界网关功能实体的标识信息。
6、如权利要求 1至 5任一项所述的方法, 其特征在于, 所述基于业 务的策略决定功能实体接收的撤销资源预留的通知来自接入层资源准入 控制功能实体。
7、 如权利要求 6所述的方法, 其特征在于, 还包括: 所述接入层资 源准入控制功能实体检查是否需要回收已安装给资源控制实施功能实体 的策略, 并在需要时通知资源控制实施功能实体回收策略。
8、 如权利要求 7所述的方法, 其特征在于, 还包括: 所述资源控制 实施功能实体向接入层资源准入控制功能实体返回执行结果。
9、如权利要求 1至 5任一项所述的方法, 其特征在于, 所述基于业 务的策略决定功能实体接收撤销资源预留的通知之前, 还包括: 由网络 附着子系统或资源控制实施功能实体触发所述撤销资源预留的相关事 件。
10、 如权利要求 1至 5任一项所述的方法, 其特征在于, 所述基于 业务的策略决定功能实体接收撤销资源预留的通知后, 还包括: 所述基 于业务的策略决定功能实体通知应用功能实体撤销资源预留。
11、 一种网络设备, 其特征在于, 包括:
用于接收撤销资源预留指示的处理单元;
用于根据所述处理单元输出的撤销资源预留指示确定是否需要边界 网关功能实体释放并回收业务资源的判断单元; 以及
用于在所述判断单元确定需要边界网关功能实体释放并回收业务资 源时通知所述边界网关功能实体的第二通知单元。
12、 如权利要求 11所述的网络设备, 其特征在于, 所述判断单元包 括: 上下文解析单元, 用于解析来自接入层资源准入控制功能实体的撤 销资源预留的通知中携带的应用功能实体请求资源时生成的上下文; 判别单元, 用于才艮据所述上下文解析单元的解析结果确定边界网关 功能实体是否为会话分配有业务资源。
13、如权利要求 11所述的网络设备, 其特征在于, 所述判断单元包 括: 记录信息查询单元, 用于查询本地记录的应用功能实体请求资源时 生成的信息;
检测单元, 用于根据所述记录信息查询单元的查询结果检测边界网 关功能实体是否为会话分配过业务资源。
14、 如权利要求 11至 13任一项所述的网络设备, 其特征在于, 还 包括: 用于根据撤销资源预留指示通知应用功能实体撤销资源预留的第 一通知单元。
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CN100391163C (zh) 2008-05-28
US7889648B2 (en) 2011-02-15
EP1760965B1 (en) 2010-06-09
JP4540648B2 (ja) 2010-09-08
CN101160829B (zh) 2010-08-25
ES2345055T3 (es) 2010-09-14
DE602006014771D1 (de) 2010-07-22
CN101160829A (zh) 2008-04-09
JP2007095048A (ja) 2007-04-12
ATE471015T1 (de) 2010-06-15
US20070070891A1 (en) 2007-03-29

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