面向异构网络融合的业务提供技术

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1、面向异构网络融合的业务提供技术徐名海徐名海南京邮电大学通信与信息工程学院南京邮电大学通信与信息工程学院提 纲p 网络发展的几个特点p 困境与破解之道p 下一代业务重叠网(NGSON)p 物联网与智慧城市p 几点思考 网络发展的几个特点n 业务：话音业务为主-高级多媒体业务n 网络：异构、融合、协同n 终端：智能、移动、感知n 用户：消费者、创造者Assemblage 1 devicesNetwork devicesAssemblage 2 devicesMobile Phone(w/container):audio encoder,VT dialerHDTV:Audio decoder,vid

2、eo decoder,video display and text display,self-view displayCamera:video capture and encoderMicrophone.Audio capture(raw)Speakers:Audio playback(raw)Text to speech(TTS)Automatic speech recognition(ASR,speech to text)Desktop Phone(w/container):Video capture,video encoder,Video decoder,text display,sel

3、f-view displayMobile Phone(w/container):VT receiverPicture frame:still image display,alertGeneric interworking scenario for heterogeneous wireless networksInterworking levels and related interworking mechanisms 终端：智能、移动、感知（1/2）终端：智能、移动、感知（2/2）用户从网上内容的消费者到创造者 困境与破解之道-地位/角色不明晰-需求未满足用 户-定位多变-竞争多于合作、网络独

4、立网络运营商-接入壁垒-市场认知和成长困难业务开发商-产品附加值下滑-运营无许可和用户基础设备制造商-可控可管与开放虚拟矛盾-难于调整利益格局监管部门新商业模型调整利益格局网络融合、协同服务第三方认证与融合业务平台下一代业务重叠网(NGSON)n NGSON引入背景n NGSON基本概念n NGSON典型应用 NGSON引入背景u 网络架构演进u 几种主要业务提供模型 -WEB Services/SOA -SDPu 业务组合u 现有方案的主要缺陷Evolution of service functional separationSOAP-based web services architect

5、ure(Simple Object Access Protocol)SOAw In SOA,various software programs,computing devices,and networking resources are encapsulated via standardized common interfaces as loosely-coupled service components;each service component publishes its location and service description to a registry(also called

6、 a service broker)w The service in SOA is provisioned according to the“find,bind,and execute”paradigmw SOA is an abstract reference model,implemented by different techniquesw The SOA implementation based on Web services is becoming popular and being standardized in the grid computing and Web computi

7、ng communitiesw In SOA,messages exchanged among service requesters,service providers,and service brokers are usually in XML format and communicated over the SOAP protocolRESTful web services(Representational State Transfer)w Addressability REST models the datasets to operate on as resources,and iden

8、tifies each resource via a URIw uniform interface REST resources are accessed via a uniform and standard interface -familiarity -interoperabilityw Statelessness each REST request is self-contained with all the information the server needs to fulfill the request -easy application development -good sc

9、alability -easy load balancingEMBEDDED WEB SERVICESwOverhead:The ideal UDP payload over 6LoWPAN and IEEE 802.15.4 is just 6080 bytes for reasonable performance(avoiding fragmentation).HTTP headers alone are easily larger than this.The use of XML payloads adds further overhead as it represents conten

10、t inefficiently.The embedded web will require both highly efficient application transfer protocols and payload formats to meet the expected overhead.wTCP binding:Web services today depend on TCP,which has performance problems over lossy links,sensitivity to mobility,no multicast support and high ove

11、rhead for short-lived transactions.Furthermore the congestion and flow control model does not match M2M interaction models well.wPull model:In sensor networks wireless nodes are typically sleeping over 90 percent of the time,making the HTTP request/response pull model inappropriate.Other interaction

12、 models are needed such as eventing and publish/subscribe.wComplexity:Although HTTP may in theory seem simple,when used by modern HTTP servers,clients,and proxies it is not.HTTP has evolved into a highly complex protocol as used between modern servers and browsers.A large number of features and opti

13、onal headers may be employed,increasing embedded device complexity.The use of XML as a payload adds further parsing complexity.In RPC web services this is further compounded by the use of SOAP.Typical CoAP message exchanges.A successful confirmable(CON)message is acknowledged(ACK).Below,a retransmis

14、sion is performedbefore a successful ACK is receivedSDP(1/3)w OSE/OSPE(OMA):open SDP,SOA defines a framework that unifies service design,creation,composition,deployment,activation,provisioning,execution,and more under a common logical vieww integrates network resources and service capabilities using

15、 the SOA approachw IMS is a standard-based IP connectivity and service control architecture that enables various types of multimedia services to end users using common Internet-based protocols for next-generation networks(NGNs)SDP(2/3)w OPUCE(Open Platform for User-Centric Service Creation and Execu

16、tion)a European project aimed at developing a complete and global platform for the dynamic creation and delivery of user services and softwarew a user-centric platform for telecom-oriented usergenerated services that provides users with the tools they need to create new servicesw OPUCE can achieve t

17、hree main objectives -end-user services creation and service execution(i.e.,adaptability and context awareness,service discovery,sharing,and notification)-security and identity management -user-centric service life cycle managementw OPUCE was not designed as a platform for overlay networks on top of

18、 independent underlying networksSDP(3/3)w SPICE(Service Platform for Innovative Communication Environment)aims at providing a service environment to enable telecom operators and service providers to reduce the cost and time of deploying innovative mobile service creation/execution platforms for netw

19、orks beyond 3Gw The SPICE platform provides context-aware dynamic service composition by combining and adapting network components within the service composition environment(SCE)REQUIREMENTS FOR BUSINESS MODELS TO SUPPORT WEB SERVICE COMPOSITIONStatic composition supportDynamic composition supportAl

20、lows requests for services not found in the registryShows who does the composition and whereAllows new playersComparative analysis of existing business modelsbusiness model for Web service composition现有方案的主要缺陷w 限于单一网络域w 不能适应动态复杂的用户、业务和网络环境w 传输控制能力弱 NGSON基本概念n NGSON基本模型n NGSON主要特征n NGSON与其它角色的关系n NGS

21、ON与SDP比较A network model of NGSONNGSON主要功能与特征Service Discovery and NegotiationService RoutingService CompositionTransport QoS ControlContent Delivery SupportContext AwarenessSelf-OrganizationDynamic Adaptation NGSON典型应用n NGSON实施系统架构n 业务组合示例n 环境感知的内容分发Context-aware capability provided by CIM FE in the

22、 NGSON物联网与智慧城市n 传感网、物联网与泛在网n 智慧城市技术内涵n 智慧城市实例传感网、物联网与泛在网传感网传感网物联网物联网泛在网泛在网定义定义末端关键设备末端关键设备通信对象通信对象传感网传感网包含互联的传感器节点的网络，这些节点包含互联的传感器节点的网络，这些节点通过有线或无线通信在局域活小范围内交通过有线或无线通信在局域活小范围内交换传感数据。换传感数据。传感器传感器物对物物对物物联网物联网是指在物理世界的实体中部署各种信息传是指在物理世界的实体中部署各种信息传感设备，通过网络设施实现广域或大范围感设备，通过网络设施实现广域或大范围的人与物、物与物之间信息交换。的人与物、物与

23、物之间信息交换。传感器、传感器、RFIDRFID、二维码、二维码、摄像机、各种移动通信摄像机、各种移动通信模块模块物对物、物对物、物对人物对人泛在网泛在网提供个人和提供个人和/或设备无论何时、何地、何或设备无论何时、何地、何种方式以最少的技术限制接入到服务和通种方式以最少的技术限制接入到服务和通信的能力信的能力传感器、传感器、RFIDRFID、二维码、二维码、各种移动通信设备、手各种移动通信设备、手机、机、PCPC等等物对物、物对物、物对人、物对人、人对人人对人传感器网是物联网实现传感器网是物联网实现数据信息采集的一种末数据信息采集的一种末端网络；物联网是迈向端网络；物联网是迈向泛在网络的重要

24、一步泛在网络的重要一步物联网基本概念定义定义：指通过信息传感设备，按照约定的协议，把任何物品与互联网连接指通过信息传感设备，按照约定的协议，把任何物品与互联网连接起来，进行信息交换和通讯，以实现智能化识别、定位、跟踪、监起来，进行信息交换和通讯，以实现智能化识别、定位、跟踪、监控和管理的一种网络。它是在互联网基础上延伸和扩展的网络。控和管理的一种网络。它是在互联网基础上延伸和扩展的网络。20102010年年3 3月，月，我国政府工作报告所附的注释中物联网我国政府工作报告所附的注释中物联网定义定义属性属性：物类终端（：物类终端（RFIDRFID、TagTag、SensorSensor、Camer

25、aCamera、）网络（网络（BAN/PAN/CAN/OANBAN/PAN/CAN/OAN、公网）业务（如智能交通、监控）、公网）业务（如智能交通、监控）关键关键：业务：业务M2M基本模型Example M2M use cases with wireless WAN coverage and mobility supportA high-level M2M system architectureMicro economy is entering the 5th phase “Long-Period”Theory about Economy 177018201870192019702005203

26、0GDP/Head1789-18301830-18801880-1930 1930-19801980-2030NLUKUKNLUSAUKNLUSAUSAUKNLUSAJPUKNLUSAJPUKJPSpinSteelOilAutoIT&CTIT&CTDigital wave is sweeping the globeMusic&Movie Office EducationEntertainmentCommerceTechnologies Digital ContentsNetworkRequirementsChallenges&ActionsDigital ContentBroadband Wi

27、relessRequirement Driven Technologies SupportDigital lifestyle and workstyle 010100101001010010100101001010010100101001010010100101001010010100101001010010100101001010010100101001010101011010010101010010101010010101010010101010010101010HealthcareWorkingEnter-tainmentFamilyBusinessEducation智慧城市愿景创造出信

28、息空间和物理空间相结合的 新城市空间环境智能化城市服务化生活便利化愿景3 i-CityIntegratedIntelligentInnovative内容技术框架整合物空间人活动服务功能交通设施环境安全医疗市政BroadbandMobileGISRFIDSensorsGPS无处不在的计算和网络,以信息通信技术为基础把整个城市领域整合起来，建设成集成的(Integrated),智能的(Intelligent),自主创新(Innovative)的城市空间。57智慧城-融合的软基础设施3 traditional utilities4th UtilityPower InfrastructurePower

29、 ServiceWater InfrastructureWater ServiceGas InfrastructureGas ServiceSmart City InfrastructureOnline IT serviceMulti-mediaService One infrastructure for one service High-level of maturity,low levels of customization Single vendor for each infrastructure to deal with One infrastructure for many serv

30、ices Rapid innovation and customization,planning paramount to making future-proof Multiple vendors and partners form complex ecosystemCommunication service智慧城市的特征2341融合，网络与业融合，网络与业务融合务融合Converged All IP infrastructure for all smart city service delivery无线宽带无所不在无线宽带无所不在Business,community and citizens

31、 are highly connected with broadband any where.绿色绿色Green network,Energy and resource efficient structure.电子电子-生态环境生态环境One-stop business services,simple living,unique lifestyleSmart City持续、可发展的、创新的、商业模式！持续、可发展的、创新的、商业模式！智慧城市的技术内涵（1/2）Disaster/crisis managementUSN Applications&ServicesLogistics,SCM Di

32、saster SurveillanceMilitary FieldStructural health monitoring Agricultural controlRFID ReaderMobileRFID ReaderDirectory serviceUSN MiddlewareServicesManagement RFID/Sensor NetworksUbiquitous web services Context modeling and management Contents management U-Health careSpatial info management RFID/Se

33、nsor NetworksSN GatewayAccess NetworkAccess NetworkAccess NetworkAccess NetworkSN GatewaySensor nodeAccess NetworkSN GatewaySource:ITU Y.2002NGN泛在化的末端感知网络泛在化的末端感知网络融合化的网络基础设施融合化的网络基础设施普适化的信息计算与服务普适化的信息计算与服务60智慧城市的技术内涵（2/2）几点思考w 用户处于中心地位，既是消费者，也是创造者。-CBM，简单用户界面，用户行为分析（数据挖掘）w 网络异构。-NGSONw 终端异构。-协同，虚拟终

34、端w 业务是关键。-运营模式、业务组合和内容的创新w 物联网和智慧城市的本质在于泛在的计算和存储以及融合的数据和业务。-NGSON+CC获得移动数据业务收入的关键是理解移动通信需求，并把他们组合成可管理的细分市场市场细分特征市场细分特征移动通信需求移动通信需求人口统计学人口统计学 年龄 收入 职业行为方式行为方式 面向工作/家庭/娱乐 价格敏感度 质量要求 媒体类型要求使用移动的方式使用移动的方式 话音 数据 增值服务 漫游 支付方式价格敏感价格敏感方便性方便性形象形象/时尚时尚生产率生产率/效率效率知识知识/教育教育乐趣乐趣/娱乐娱乐安全安全能成功能成功满足消满足消费者需费者需求和创求和创造数据造数据收入的收入的客户化客户化应用应用对用户的研究，包括研究和群组分析，将彼此无联系的市场分成相同需求的客户群对用户的研究，包括研究和群组分析，将彼此无联系的市场分成相同需求的客户群