MMS(多媒体短消息业务)及其实现

MMS是3GPP和WAP论坛制订的移动数据业务。与SMS相比，它除了可以发送简单文本消息外还可以发送图像、音频、视频、动画等多媒体信息内容。文中对MMS的体系结构进行了介绍，对MMS系统两种实现方式：基于WAP的实现和基于IP的实现进行了探讨，最后还对MMS业务的部署进行了讨论。     

彩信业务对通信企业的发展贡献分析

随着通信市场发展,各服务提供商之间竞争日益激烈。除语音之外的数据业务已经成为各服务提供商之间竞争的焦点。多媒体信息服务,也称为彩信服务成为最有竞争力的增值业务之一。彩信业务对通信企业的贡献率将逐年增加。     

Implementation solutions for the interworking between MMS and streaming

Multimedia messaging service (MMS) and streaming are forerunner multimedia applications in mobile communication. Use of streaming in the retrieval of continuous multimedia content of MMS is the identified optimum scope (extent) of interworking between MMS and streaming. The optimum interworking can remove a limitation visible in MMS—retrieving content requiring more storage space than available in a mobile terminal. This paper presents two different solutions for implementing the interworking. The implementation solutions are consistent with the existing mobile frameworks and the working principles and procedures of both MMS and streaming. Consistency is very important here not only to avoid creating isolated solution, but also to preserve user experience. This paper describes in detail how each of the solutions operates, including the process of using streaming in the MMS retrieval. Pros and cons of both the solutions are also analysed to compare those. Other important factors tackled in the analysis are implementation flexibility, complexity, terminal capability indication, and content adaptation. Copyright © 2003 John Wiley & Sons, Ltd.     

A lightweight convergent personal mobile service delivery approach based on phone book

Mobile phone users are demanding an efficient convergent communication approach for efficient communication and information sharing with their real life social circles. Unfortunately, the existing telecom services and the popular Internet services are not organically integrated to provide convenient convergent services. To overcome this issue, one of the promising convergent communication services considered by telecom carriers is RCS (Rich Communication Suite). However, existing issues, such as insufficient interoperability among different operators, shortage of terminals and heavy dependence on large‐scale IP multimedia subsystem (IMS) network deployment, mean that it will take time to implement RCS across worldwide networks and for it to become a service equally universal as voice and short message. Instead of a heavyweight RCS solution, in this paper, we propose a lightweight, quick deployment mobile phone book application system based on cloud computing without a fully deployed IP multimedia subsystem infrastructure, which seamlessly integrates traditional telecommunication services, instant messaging services, social networking services and automatic contact information management. Based on this, ‘Telco‐OTT’ service provision approach, telecom carriers can allow their subscribers to enjoy conveniently the rich convergent personal service experience quickly without a large initial investment. Thus, it is a low‐risk opportunity for telecom carriers to meet subscriber demand for advanced user‐centric convergent service features. Copyright © 2013 John Wiley & Sons, Ltd.     

多媒体信息业务

文章从业务应用和信息收发的角度对多媒体信息业务(MMS)进行了描述,从技术角度对MMS的系统结构和实现进行了研究,对多媒体信息的结构和制作进行了探讨.     

Lifting the limits on high speed wireless data access using antennaarrays

The explosive growth of both the wireless industry and the Internet is creating a huge market opportunity for wireless data access. Limited Internet access, at very low speeds, is already available as an enhancement to some existing cellular systems. However, those systems were designed with the purpose of providing voice services and-at most-short messaging, but not fast data transfers. In fact, as shown in this article, traditional wireless technologies are not very well suited to meet the demanding requirements of providing very high data rates with the ubiquity, mobility, and portability characteristic of cellular systems. Increased use of antenna arrays appears to be the only means of enabling the types of data rates and capacities needed for wireless Internet and multimedia services. While the deployment of base station arrays is becoming universal, it is really the simultaneous deployment of base station and terminal arrays that can unleash unprecedented levels of performance by opening up multiple spatial signaling dimensions     

移动智能网多媒体消息业务的体系结构及其协议

多媒体消息业务(MMS，multimedia messaging service)作为一种新的移动数据业务已经得到了大规模的应用，在移动智能网上也可以支持这种业务。ITU-T、ETSI对移动智能网支持MMS并无相应的规范，目前国内计划采用的是SCP(service control point)与MMSC(multimedia messaging service center)互联的解决方案。本文在对此方案做详细分析的同时，提出了基于CAMEL(customized application for mobile enhanced logic)的MMS体系结构，并对此进行了深入的探讨。在此基础上，分析计算了智能多媒体消息业务对SCP及信令链路造成的影响。     

Improved implementation solution and general mobile network architecture for the interworking between MMS and streaming

The prospects of multimedia in mobile communication depend largely on effective design of interactive multimedia applications now. Multimedia Messaging Service (MMS) and streaming are two potential multimedia applications for mobile communication. Though MMS has many advantages, a limitation is noted in MMS—an inability to handle a message requiring more space than available in a mobile terminal, as the message must be fully retrieved and stored before its presentation. Moreover, a large message can keep a recipient user waiting long for its retrieval before it is presented, causing poor user‐experience. This paper proposes a new implementation solution for the interworking between MMS and streaming to overcome the limitation. The new solution is consistent with the existing frameworks and working principles of both MMS and streaming. The new solution is compared with the previous solutions, indicating that it has considerable advantages. This paper also presents general network architecture, providing various architectural options, to accommodate the interworking in different situations. The architecture considers many practical cases, like person‐to‐person messaging, messaging involving content providers and multiple network operators, load balancing and scalability in related network servers, operational agreement between a content provider and a network operator, and using existing network infrastructure for the interworking. Copyright © 2005 John Wiley & Sons, Ltd.     

基于短信息服务的移动安全通信系统设计

短信息由于其成本低廉、使用方便等特点,被广泛应用于业务数据交换。但由于其本身的不安全因素,无法满足传递敏感数据需求。为此,设计了基于短信息服务的移动安全通信系统,在移动终端设备、通信链路和应用服务等方面都采取了安全保障措施。通过短信息服务,可实现移动通信网络和固网应用服务的安全无缝集成。     

一种基于消息方向的移动台状态转移方案

论文基于即时消息业务中上下行消息流之间的相关特性,提出了一种根据先前所处理消息的方向为移动终端状态定时器分配不同阈值的机制,并研究了其对下行包队列长度、下行消息时延和功耗节省等性能的影响。仿真结果表明,与传统单值状态定时器方案相比,该机制在保证相似服务质量的基础上显著降低了移动终端的功耗。     

5G URLLC无线网络部署方案分析

URLLC场景是5G的典型应用场景之一,也是体现5G技术先进性的重要场景。随着URLLC增强技术标准化工作的完成,运营商需要明确5G URLLC网络下承载的典型业务,推动URLLC无线网络的部署。根据3GPP对不同业务网络指标需求的分析,结合ITU对URLLC场景时延与可靠性指标的要求,分析URLLC场景下潜在的应用,探讨了5G URLLC无线网络的部署方案。     

Compact multidimensional broadband wireless: the convergence of wireless mobile and access

Broadband wireless communications have gained increased interest during the last few years. This has been fuelled by a large demand on high-frequency utilization as well as a large number of users requiring simultaneous high-data-rate access for the applications of wireless mobile Internet and e-commerce. The convergence of wireless mobile and access will be the next storm in wireless communications, which will use a new network architecture to deliver broadband services in a more generic configuration to wireless customers, and support value-added services and emerging interactive multimedia communications. Large bandwidth, guaranteed quality of service, and ease of deployment coupled with the great advancements in semiconductor technologies make this converged wireless system a very attractive solution for broadband service delivery.     

A systematic approach for closer integration of cellular and Internet services

The road to 4G runs through 3G, 2G and 2.5G networks. Until 3G is deployed ubiquitously, 2-2.5G networks and endpoints dominate. Because of their widespread deployment and adoption, these endpoints can help ease the transition to an all-Internet 3G/4G network. We describe a standards-based service architecture and its implementation that allows 2-2.5G endpoints to participate as active actors in realizing Internet services like presence and instant messaging without the endpoints themselves being connected to the Internet. Our architecture also demonstrates service migration, wherein a successful 2G service such as short messaging service morphs transparently into its Internet equivalent, an instant message. Our methodology conserves precious radio access bandwidth by offloading such data services from the bandwidth normally allocated to voice. Our approach, as embodied in the service architecture, is to leverage the best of the Internet protocols (SIP, XML) and technologies (instant messaging, presence) to provide a general framework for personalized service specification and execution.     

Heterogeneous Networks to Support User Needs with Major Challenges for New Wideband Access Systems

Third generation mobile radio systems are currently being deployed in different regions of the world. Future systems beyond the third generation are already under discussion in international bodies and forums such as ITU, WWRF and R&D programs of the European Union and in other regions. These systems will determine the research and standardization activities in mobile and wireless communication in the next years. Based on the experience from the third generation future systems will be developed mainly from the user perspective with respect to potential services and applications including traffic demands. This is directly related to the paradigm shifts from the first generation to systems beyond third generation. International bodies are already discussing basic system requirements. The basic system architecture of heterogeneous networks with different complementing access systems is from the today's perspective the most economic approach for systems beyond 3G to satisfy user and operator needs for reasonable cost. Such system architectures enable the deployment of system capacity according to the traffic requirements with the user experience ``Optimally Connected, Anywhere and Anytime' with seamless service provision between different access systems. New radio interface components with high data rate as additional components of systems beyond 3G are being proposed in international bodies. Key issues of such systems are coverage due to reduced range and the huge spectrum demand. In this paper the international context, the user perspective, revenue and traffic expectations are presented. This results in the basic system requirements and the potential system architecture of heterogeneous networks. Major challenges for the new wideband radio interfaces are the impact on range and spectrum demand. Basic investigations are presented on these issues to critically review requirements on future systems.     

The role of Internet technology in future mobile data systems

Mobile telephony and the Internet are the fastest growing businesses in the telecommunications market. This is why most operators and service providers are looking after the development of new services in both sectors, and newcomers are expected to enter the arena. The mobile operators foresee an increasing share of their revenues coming from new data services, while Internet service providers are attracted to wireless technology and mobility services both to reduce costs within the last-mile segment and to enrich their market share, providing ubiquitous access to the Internet and corporate intranets. In this scenario several wireless overlay networks will coexist, and their interworking will be a challenging objective. The employment of Internet technology, with its novel mobility and security extensions, seems to be the most attractive option for achieving that goal. In addition, the migration to a full IP network architecture, even within each specific wireless domain, will be another promising opportunity, already under consideration within several technical and standardization bodies. The envisioned role of Internet technology makes it worthwhile to undertake significant research efforts on the development of innovative IP-based mobile data systems, and opens promising opportunities for both telcos and Internet service providers.     

Multimedia adaptation for the multimedia messaging service

This article provides an overview of the multimedia messaging service. It also addresses the interoperability challenges this new service brings as mobile terminal capabilities evolve at a very fast pace. It explains how server-side multimedia message adaptation technologies can provide smooth format and service evolution while ensuring interoperability.     

基于业务特征的TDD-LTE端到端QoS参数研究

针对移动互联网快速发展对无线接入网的高带宽和业务质量需求,首先进行了常用的移动互联网业务研究分析;其次,依据业务特性、3GPP网络协议规范和本地已部署的TDD-LTE网络结构,提出了端到端QoS设置模型;最后,在商用网络上进行QoS 参数部署验证。研究结果表明：在典型高速率业务环境下,TDD-LTE单小区峰值调度用户数增加253.92%;在现网混合业务拥塞环境下,TDD-LTE 单小区峰值调度用户数增加81.80%。研究结果具备良好的行业应用性和推广性。     

面向5G的智慧园区蜂窝网络基础设施部署方案

面向智慧园区的建设和5G时代的到来,移动通信业务由标准化走向快速创新,本文结合某产城融合型智慧园区无线网络部署案例,探讨了面向5G的智慧园区业务需求,提出了采用UCNC架构的无线组网模式,并给出了室外宏站、微站和综合机房的部署需求和建议。     

移动终端的技术走向

通信产业的飞速发展,使移动终端的概念发生变化,它的功能已经超出了简单的移动电话,向智能化和多媒体化方向发展,未来移动终端的发展趋势将再有8大特点。可以预见．移动终端将成为移动业务的重要承载平台,手机终端设计更加竞出个性化．能为消费者带来新颖丰富的应用．丰富用户的无线生活。移动终端的应用运行平台和终端操作系统等支撑技术对与移动终端的发展非常重要,可以通过规范技术平台解决终端标准化问题,移动终端操作系统的选择将影响未来智能手机的发展方向。     

安全芯片在即时通信系统中的应用研究

安全芯片是一款可以独立进行密钥生成,提供多种加密算法,支持公钥基础设施及数字签名等安全认证及保障功能的产品,目前广泛应用于企业级和商业安全领域,提供身份认证服务和数据安全保护.文中提出一种安全芯片在即时通信系统中的应用方案的设计,通过把安全芯片封装到手机的SD存储卡中,通过安全芯片实现终端用户之间的可信安全交互,从而为手机和移动终端设备构建安全可靠的即时通信系统.