【整理】什么是IBCF CBGF SBC – 在路上 |
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【整理】什么是IBCF CBGF SBC – 在路上
折腾：【整理】搞清楚RCS和IMS的架构逻辑关系期间，看到各种关于：IBCF CBGF SBC去搞清楚什么含义后来发现之前有查过interconnection相关II-NNI=Inter-IMS-NNIIBCF=Interconnection Border Control Function和：I-CSCF=Interrogating-CSCF=询问-CSCF概述是另一个位于管理域边缘的功能组它的IP地址通过DNS发布，所以远程服务器可以查找到它，并把它作为向它所在的域传递SIP包的跳点功能它查询HSS，获取S-CSCF的地址并且分派给用户以完成SIP注册。它也为S-CSCF传递SIP请求和回应直到IMS第6版，它是可以用来把内网隐藏起来，使外部网络无法获取内部网络的信息（加密部分SIP信息）。这里称之为THIGTHIG=Topology Hiding Inter-network Gateway=隐藏内部网络拓扑网关从第7版开始，这个功能从I-CSCF移走，作为IBCF的一部分。IBCF被用作外部网络的网关，提供NAT和防火墙功能。IBCF实际上是NNI的会谈边界控制器的裁剪版本。IBCF=Interconnection Border Control Function=互联边界控制功能组IBCF CBGF(PDF) Solving cluster ensemble problems by bipartite graph partitioning | Carla Brodley – Academia.eduhttps://www.academia.edu/2886518/Solving_cluster_ensemble_problems_by_bipartite_graph_partitioninghttp://www.math.chalmers.se/Stat/Grundutb/GU/MSA220/S18/ClusterEnsembles.pdfhttp://www2.nict.go.jp/astrec-att/member/mutiyama/pdf/ibcf.pdfA magic box called SBC | Real Time CommunicationRoaming in IMS | Real Time CommunicationCBGF control borderCore Border Gateway Function – How is Core Border Gateway Function abbreviated?Border Gateway Function 6.5 to 11.1.1http://rbman.ito.expert/lzn7830011_1r3f/1_10948-CRA1191170_1Uen.A.pdfInterconnect Border Gateway Function (I-BGF) on UMG8900-Core Network Info Community-Huawei Connecthttps://www.terena.org/mail-archives/tf-vvc/pdfnGz3qUZqNw.pdfITU-T / ATIS Workshop “Next Generation Technology and Standardization” Las Vegas, 19-20 March 2006 Signaling Architecturehttps://www.itu.int/ITU-T/worksem/ngn/200603/presentations/s4_shaikh.pdf【总结】名词IR=Information RetrievalCF=Collaborative FilteringCBF=Content-Based FilteringRAVEL=Roaming Architecture for Voice over LTE with Local BreakoutLBO=Local BrakeoutTRF=Transit and Roaming FunctionIBCF=Interconnection Border Control FunctionSBG=Session Border GatewaySCTP=Stream Control Transport ProtocolSGC=Session Gateway ControllerSME=Small Medium EnterpriseBGF=Border Gateway FunctionC-BGF=CBGF=Core – Border Gateway Function是什么：一种访问网关access gateway位置：介于某种访问网络access network和IMS核心网络（core network）之间I-BGF=IBGF=Interconnection Border Gateway Function是什么：NNI的其中一种位置：介于core(可信的）和 外部网络SBC=Session Border Controller=会话边界控制器是什么：一个 控制器=网络节点=网络元素位置：位于IMS系统中介于2个网络之间的作用：控制所有的数据传输包括信号signalling（媒体）数据media协议https://tools.ietf.org/html/rfc5853用于解决各种问题多种（访问 接入）网络multiple access networksIPv4/IPv6SIP normalizationVPNs安全问题security issuesDOS attackstopology hiding加密信号：TLS和IPSec媒体数据：SRTPlegislative issues=Regulatory=管制emergency callslegal interceptinterworking媒体相关问题media related problemsQoStranscodingmedia security实际作用最早：作为NATSBC as a NAT 具体例子VoLTE Call – Data Path 现状各种类型SBCA-SBCI-SBCICS-SBCEnterprise SBCTrunking SBCWebRTC GW功能重叠或独立某些功能可以独立出其他模块比如P-CSCFE-CSCF最新：把SBC理解为负责 安全 和 连接 方面的功能其他一些也可以被视为SBC的CBGF E-CSCFATCFATGWEATFWebRTC GWICE从IMS角度2种类型SBC包含A-SBC=Access-SBC架构 相关内容=对应功能P-CSCF=Proxy Call Session Control FunctionIMS-ALG=IMS Application Level GatewayIMS-AGW=IMS Access GatewayI-SBC=Interconnecting-SBC相关内容=对应功能IBCF=Interconnection Border Control FunctionTrGW=Translation GatewayTHIG=Topology Hiding Interwork GatewayIWF对比A-SBC and I-SBC 稍微复杂点的情况Call Forwarding and LI and Interconnect 漫游往往涉及到SBC可能方案1 可能方案2 可能方案3 LBO-VR with OMR LBO-HR 其他相关架构Logical Position of D-SBC and SmartEdge BGF in IMS or Other Multimedia Networks IMS Protocol Stack协议栈 Transport level interworking – Protocol Stack Service level interworking – Protocol Stack IMS架构  IMS architecture for SBC UNI NNI Reference Points IMS架构架构图 核心元素和简介AS=Application ServerExecutes service logic associated with value-added servicesProvides enhanced and intelligent services to subscribersCSCF=Call Session Control FunctionP-CSCF=Proxy CSCFis the first point of contact and the control point for the User Equipment (UE) within the Service Provider network. It forwards session requests from the UE to the S-CSCFS-CSCF=Serving CSCFhas access to the user subscription data and actually handles the session requestI-CSCF=Interrogating CSCFis the first contact point within a Service Provider network for all incoming session requests from another Service ProviderBGCF=Breakout Gateway Control FunctionIdentifies the network that will be used for connecting IP sessions to the PSTNHSS=Home Subscriber ServerStores all the static and dynamic information for a subscriberMaintains a list of features and services associated with a user, and also the location and means of access to the userProvides user profile informationSLF=Subscription Locator FunctionQueried during Registration and Session Setup to get the name of the HSS containing the required subscriber specific dataMGCF=Media Gateway Control FunctionControls the parts of the call state that pertain to connection control for media channels in a T-MGF MGWSelects the CSCF depending on the routing number for incoming calls from legacy networksPerforms protocol conversion between ISUP and call control protocols (e.g., SIP) and maintains call statesMRFC=Multimedia Resource Function ControllerControls the media stream resources in the MRFP under direction from an S-CSCF or Application ServerInterprets information coming from an AS or S-CSCF (e.g., session identifier) and controls MRFP accordinglyMRFP=Multimedia Resource Function ProcessorProvides media resources under the direction of MRFCMay generate media streams (e.g., multimedia announcements), mix incoming media streams for multiple parties, or process media streams (e.g., audio trans-coding, media analysis)PDF=Policy Decision Function简介：Provides management of network QoS resources, authorization of resource allocations, and makes policy decisions with regard to use of network QoS resourcesSPDF=Service Policy Decision FunctionT-MGF=Trunk Media Gateway FunctionTerminates bearer channels from a switched circuit network and media streams from a packet network (e.g., RTP streams in an IP network)Establishes and releases connections between these channels under control of the MGCF in support of calls between PSTN and IP networkSGF=Signaling Gateway FunctionActs as a gateway between the IP call/session control signaling and the SS7-based PSTN signalingMay provide signaling translation, for example between SIP and SS7 or simply signaling transport conversion e.g., SS7 over IP to SS7 over TDMA-BGF=AccessBorderGatewayFunctionPacket gateway between an access network and a core network used to mask a service provider’s network from access networks, through which UE accessing packet-based services (e.g., IMS, Internet)Functions may include Opening and closing gate, Traffic classification and marking, Traffic policing and shaping, Network address and port translation, and Usage informationUnder control of the PDFI-BGF=Interconnection Border Gateway FunctionPacket gateway used to interconnect a service provider’s core network with another service provider’s core network supporting the packet-based servicesFunctions may be the same as that of the A-BGFI-BCF=Interconnection Border Control FunctionControls I-BGF to interwork with other packet-based networksMay support the following functions (not limited to)Inter-domain protocol normalization and/or repairInter-domain protocol interworkingInteraction with PDF for resource reservation, resource allocation, and/or other resource related informationMRB=Media Resource BrokerAssigns specific media server resources to incoming calls at the request of service applications (i.e., an AS)Acquires knowledge of media server resources utilization and reservation requests that it can use to help decide which media server resources to assign to resource requests from applicationsEmploys methods/algorithms to determine media server resource assignment转载请注明：在路上 » 【整理】什么是IBCF CBGF SBC |
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