多功能基站移动终端分组数据业务研究

在GSM多功能基站的基础上增加了实现移动终端分组数据业务的功能,使得多功能基站的功能更加完善,相比于商用基站简化了终端分组数据业务实现的过程且能够在控制端对网络数据的交互进程实施管控。通过对多功能基站的系统参数配置,与终端之间的信令交互,以及对网络层的数据处理之后终端可以在多功能基站下实现分组数据业务,最后在控制终端对网络数据的交互进程进行管控。经过测试证明多功能基站系统能够有效的实现终端分组数据业务。     

数字电视多媒体消息业务认证系统安全研究

随着数字电视增值业务的逐步实现,出现了承载该功能的新终端——多功能遥控器,如何保证多功能遥控器应用(如多媒体短消息业务)安全成为新课题.针对当前数字电视多媒体消息业务的不安全因素,提出了ECC公钥密码应用于数字电视多媒体消息业务,并设计和实现签发及验证ECC证书的TVMMS系统.有效弥补了数字电视增值业务中身份认证和状...     

The available bit rate service for data in ATM networks

The authors describe the purpose of the available bit rate (ABR) service in the context of other ATM services and review the agreements on the traffic control mechanism. They describe the recent progress towards standardization of the new service. The general nature of the ABR service is described in comparison with constant bit rate (CBR) and variable bit rate (VBR) services     

扩展OWL-S的Web服务质量属性描述方法研究

目前的Web服务只有基于功能性描述的服务发现接口,不能实现具有非功能性的如QoS属性的Web服务发现。OWL-S是对Web服务的本体描述,但在服务质量(QoS)方面的描述也不尽人意。提出了扩展OWL-S中的Servi-ceProfile的本体描述方法对Web服务的QoS进行描述,并构建了服务质量树,实现了对Web服务的服务质量描述,与OWL-S对Web服务QoS的描述相比具有更好的灵活性,质量描述更精确。     

Services in interworking 3G and WLAN environments

Interworking WLANs and 3G mobile networks are expected to provide ubiquitous wireless communications at high data rates and a large variety of services with variable bandwidth and QoS requirements, across a wide range of propagation environments and mobility conditions, using dual mode terminals. The interworking of the two networks is a major step toward a new generation of wireless networks in which other radio technologies are also be integrated. In this article we present possible architectures that enable the interworking of 3G and WLAN networks. We then address the capabilities of various terminal types and describe future services in the interworking environment. Finally, we present market forecasts on terminal and service demand growth.     

终端业务上下文的定义方法及业务模型

该文针对业务上下文仅关注业务质量较少考虑用户终端环境的现状,提出终端业务上下文的概念,为普适业务的开展提供必要的信息支撑。给出一种终端业务上下文的通用定义方法,该方法可以提取各类业务场景中终端环境的特征参数,使其形成可表示、可获知的上下文。提出基于终端业务上下文的业务模型,给出上下文的存储和使用方法。最后通过一个典型的普适业务接续场景验证了上述定义方法和业务模型。结果表明,该方法可以有效提取普适业务所需的上下文信息;基于该模型,业务平台能够动态适配异构的终端环境,为用户提供个性化终端呈现和接续服务。     

Inter-videotex conversion from Prestel to Captain

The authors describe a data syntax conversion method from CEPT (European standard) to Captain PLPS (Japanese standard) to permit interconnections between videotex services. They discuss the conversion results when an overseas videotex center, in particular, the Prestel (alpha-mosaic version in CEPT standard) center in the United Kingdom, is accessed from a Captain terminal using the described method. By the conversion method presented, the Captain terminal can access CEPT videotex centers as a CEPT terminal. There are two essential features. The first is that text and graphics data are converted into photographic information on Captain terminals to absorb differences of character size and graphic display. The second is that a color replacement method based on the major colors in a coloring unit is used to solve the problem of differences of coloring units between the two videotex services     

Personal telephone services using IC-cards

An IC-card is a memory card that can be substituted for existing magnetic-striped cards. It is suggested that the IC-card, which can store various information for telephone calls, will become a useful device in multifunction telephone sets because of its portability, security, and large memory capacity. The information that should be stored on an IC-card is discussed, and the practicality of creating personal telephone services by combining telephone services with the stored user information is addressed. An experimental telephone set with an IC-card reader/writer developed to verify feasibility is presented. Service grades of IC-cards, according to their level of functionality versus the functionality of the terminal equipment, are discussed     

Distributed call processing for personal communications services

The authors present a control architecture, procedures, and a signaling system to support advanced personal communication services (PCS). They describe the current cellular system architecture, and its algorithms and data management schemes for providing services. They present review how current cellular systems operate with a focus on mobility management and call and connection control. The benefits of this architecture include lower signaling traffic over wireless links, lower network load for signaling traffic, low call/connection delivery times, ubiquitous service offering, and more efficient routing of connections     

全IP网络中的业务与终端

文章认为业务发展是网络发展的驱动力量,新技术只有在更多新业务面世的情况下才能得到大力发展.但如果业务终端的基础能力不足会形成较高的业务应用门槛,有时只有在终端技术实现突破后业务才会突飞猛进地发展.文章在分析业务发展中的终端与运营链之间的相互影响的基础上,探讨了移动网引入IMS架构后对终端制造商、网络运营商的影响,并明确指出下一代网络将归于IP网络、业务将驱动网络发展.     

Switched multi-megabit data service and early availability via MANtechnology

The authors discuss work currently proceeding at Bell Communications Research in the field of novel high-speed data services and supporting network requirements. The service described herein, switched multimegabit data service (SMDS), is one that could be offered by carrier networks to meet emerging customer high-speed data needs. The authors provide an overview of the motivations behind the service development and discuss the importance of the embedded customer base and the factors that significantly influence the nature of the service. They then describe specific SMDS features and characteristics and the use of MAN technology for the support of SMDS     

ISDN Terminals and Integrated Services Delivery

This paper proposes that the end user's perception of an "ISDN service" should reflect'three interrelated ISDN aspects, namely:bulletISDN terminal capabilities,bulletISDN access capabilities, andbulletISDN network capabilities. Emphasis is placed on the ISDN terminal capabilities in supporting integrated services delivery of different levels to the end user (e.g., integrated bearer services and integrated teleservices delivery). Such a concept, integrated services delivery, is seen to suggest a useful framework for developing a wide range of possible ISDN commercial service/ product offerings. An ISDN service scenario is also described to illustrate some important communication capabilities made possible by an ISDN environment.     

WCDMA业务分析

3G的成功主要取决于业务，WCDMA系统采用开放的业务平台，使具体的业务与网络承载相分离，极大地提高了业务的灵活性，终端的设计也更加开放。与GSM业务相比，WCDMA业务的提供方式有较大变化，其业务价值链更为丰富。另外，WCDMA的业务完全兼容GSM/GPRS的业务。本对以上内容进行了分析和讨论。     

Beyond best effort: router architectures for the differentiatedservices of tomorrow's Internet

With the transformation of the Internet into a commercial infrastructure, the ability to provide differentiated services to users with widely varying requirements is rapidly becoming as important as meeting the massive increases in bandwidth demand. Hence, while deploying routers, switches, and transmission systems of ever increasing capacity, Internet service providers would also like to provide customer-specific differentiated services using the same shared network infrastructure. We describe router architectures that can support the two trends of rising bandwidth demand and rising demand for differentiated services. We focus on router mechanisms that can support differentiated services at a level not contemplated in proposals currently under consideration due to concern regarding their implementability at high speeds. We consider the types of differentiated services that service providers may want to offer and then discuss the mechanisms needed in routers to support them. We describe plausible implementations of these mechanisms (the scalability and performance of which have been demonstrated by implementation in a prototype system) and argue that it is technologically possible to considerably raise the level of differentiated services which service providers can offer their customers, and that it is not necessary to restrict differentiated services to rudimentary offerings even in very-high-speed networks     

智慧校园中自服务终端的研究与实践

针对智慧校园建设要求,提出了一种使用自服务终端为校园用户提供智能化服务的解决方案。阐述了智慧校园的特征及自服务理念,分析了自服务终端在校园中的应用领域。设计了包括终端机硬件、终端机软件、配套监控与管理软件、对外服务接口等整套体系结构,以此为蓝图开发了北京大学校园自助服务终端系统。实践表明,系统解决了北京大学成绩单证书打印盖章、校园电子支付以及校园信息查询与展示等方面的智能化服务与管理问题。     

Leveraging countermeasures as a service for VoIP security in the cloud

The emergence of cloud computing is contributing to the integration of multiple services, in particular VoIP services. While the cloud has recently been used for performing security attacks targeting IP telephony, it also provides new opportunities for supporting the security of this service. In that context, we propose a risk management strategy for VoIP cloud based on security countermeasures that may be outsourced as services. We present the architecture of our solution and its components in the context of services implementing the SIP protocol. We describe the mathematical modelling supporting our approach and detail different treatment strategies for the application of countermeasures. Finally, we quantify the benefits and limits of these strategies based on extensive simulation results. When a countermeasure fails, these strategies allow us to maintain the risk level low at an additional cost of up to 7%, or to accept an additional risk of up to 12%. They can also be combined to obtain a trade‐off between cost and performance. Copyright © 2013 John Wiley & Sons, Ltd.     

基于应用虚拟化的智能终端关键技术研究

移动互联网风头正盛,智能终端、网络和应用成为移动互联网发展的3个要素,如何将其有力结合成为企业争夺移动互联网市场制高点的关键。智能终端的出现极大地丰富了基于云计算的应用服务的表现形式,为智能终端用户提供了大量网上云服务,因此智能终端与云应用相结合成为移动互联网云服务提供商关注的焦点。本文在分析目前主流的智能终端云计算应用模式的基础上,具体落脚于一种基于SaaS云计算架构的应用虚拟化技术,在智能终端多样化的发展趋势下,分析对应用虚拟化云应用平台的新需求,并结合实践经验总结应用虚拟化适配智能终端的关键技术。     

Methods of addressing the interactions of intelligent networkservices with embedded switch services

A key factor in the transition of the existing network to an intelligent network (IN) environment is the need to partition the network intelligence and to ensure the coexistence of the embedded switch services with the externally controlled services. If the network intelligence can be defined by entities (e.g. access control and routing, connection control, basic call control, feature control, etc.), then the issue is how to manage their distribution over the evolving network elements (NEs). The authors focus on the early phases of the IN, during a 1991-2 time frame, when these features must interwork with the existing features (e.g. those within the Centrex service). They provide an overview of the features interactions and arbitration policies prevailing in today's network. They then describe the framework for both single- and multinode networked features models. The issues of call control distributed over the NEs of the IN are treated as extensions to the concepts and interfaces needed to provide networked services like areawide Centrex and private virtual networks. A model for offering IN/1+ services is described     

移动终端信息的营销应用探讨

移动业务发展面向的潜在用户是所支持终端的用户,目标用户群的成功挖掘依赖于我们对用户终端的知晓度。本文通过介绍目前运营商获取终端信息的常用方法,探讨终端信息在新业务营销、终端精确营销、重入网识别、营销决策支持、业务功能预开通、客服即席查询、防欺诈与被盗监控等方面的应用,最后对于实现这些基于终端信息营销的前沿应用给出了切实可行的支撑建议。