彩铃业务的技术实现方式

本文首先介绍了彩铃业务的概念、特点及发展情况，接着重点介绍了三种彩铃业务的技术实现方式：交换机方式、服务节点方式、智能网方式，最后对三种方式进行了比较。     

彩铃业务实现讨论

首先介绍了什么是彩铃,以及目前的发展情况,然后讨论了基于智能网、基于被叫交换机和基于主叫交换机的彩铃组网实现方案,并对这三种方案进行了简单的比较。     

彩铃业务实现方案

彩铃业务是一项新兴的话音增值业务，自2002年推出以来发展十分迅速。本文介绍了彩铃业务在移动通信网及固网上的多种实现方式，以中国联通及中国移动某本地网为例对不同实现方式的技术进行了对比。     

一种基于交换机的彩铃业务实现方案

首先介绍了在GSM移动网络中实现彩铃业务的原理，然后提出一种基于交换机实现彩铃业务的技术方案，分析了此方案中媒体设备的物理结构和内部信令的交互过程，最后将该方案与基于智能网的方案进行了对比。     

彩铃业务组网方案的实现

介绍了目前采用的两种彩铃业务的解决方案,通过分析其各自的优缺点,提出了一种采用业务控制点（SCP）总控的方式来实现两种方案混合的解决方案,以快速有效地实现彩铃业务的全网部署.     

利用智能网技术实现PHS彩铃业务

由于目前PHS网络中基本没有统一规范的接口协议,在PHS上开展彩铃业务时多以各设备厂商自研的交换机改造方式或引入第三方平台方式为主,不利于业务互通和统一管理。本文正是立足于此,提出了利用目前成熟的智能网技术实现PHS彩铃业务的解决方案。     

浙江移动彩铃业务解决方案

个性化、差异化的服务使彩铃业务获得了成功,浙江移动采用基于智能网控制的彩铃业务解决方案,既提供了该业务属性的全省一致性,又充分利用了各种基于交换机的解决方案,最大程度上克服了智能网过渡方案中的话路迂回,节约了网络资源.铃音服务器的设立,使得系统具备分布化特征.有效的数据同步方案,使得用户业务属性的自管理的实时性得到了提高.     

福建移动彩铃业务实现方案探讨

彩铃业务是一项由被叫用户定制、为主叫用户提供一段悦耳的音乐或一句问候语来代替普通回铃音的业务。使用可以通过拨打特服号码或到相应的门户网站上定制自己的彩铃,当其他用户拨打该用户的手机时,听到的铃声就是被叫用户定制的音乐,而不再是原来千篇一律、单调乏味的回铃音。运营商通过给用户提供这种个性化、差异化的新颖业务,可以大大提高用户对其的满意度,有利于提升其自身的形象。     

一种固网彩铃业务的实现与分析

基于本地智能网平台,深圳电信成功实现了固网彩铃业务。文中总结了具体的系统实现方案,包括实现原理、物理网络、业务流程等,并对方案的优缺点进行了分析和探讨。     

彩铃业务两种实现方式及对比分析

本文详细介绍了彩铃业务的两种实现方式,包括组网结构、信令流程等,并从各个方面比较了两种方式的优缺点.     

彩铃业务及其在移动网的实现方式

本文对现阶段移动网中各种实现彩铃业务的技术方案做了较为系统的总结和利弊对比,并结合移动网的特性提出了较好地实现彩铃业务的方案.     

All-Optical Wavelength-Bypassing Ring Communications Networks

We introduce an all-optical WDM packet communication network that performs wavelength bypassing at the routers. Packets that arrive at a wavelength (optical cross-connect) router at designated wavelengths are switched by the router without having their headers examined. Thus, the processing element of the router is bypassed by such packets. For packet traffic that uses wavelengths that do not bypass a switch, the headers of such packets are examined to determine if this switch is the destination for the flow. If latter is the case, the packet is removed. Otherwise, the packet is switched to a pre-determined output without incurring (network internal) queueing delays. We study a ring network with routers that employ such a WDM bypassing scheme. We present methods to construct wavelength graphs that define the bypassing pattern employed by the routers to guide the traffic flows distributed at each given wavelength. Performance is measured in terms of the network throughput and the average processing path length (i.e., the average number of switches not being bypassed). For a fixed total processing capacity, we show that a WDM bypassing ring network provides a higher throughput level than that exhibited by a non-bypassing ring network, using the same value of total link capacity. By using WDM bypassing, the average processing path length (and thus the packet latency) is reduced. We study a multitude of network loading configurations, corresponding to distinct traffic matrices and client-server scenarios. Higher throughput levels are obtained for network configurations driven by non-uniform traffic matrices. The demonstrated advantages of WDM bypassing methods shown here for WDM ring networks are also applicable to more general network topological layouts.     

Planning of WDM Ring Networks

The rapid introduction of wavelength division multiplexing (WDM) technology to cope with the increased bandwidth requirements of transmission networks has intensified the need for recovery mechanisms at the optical layer. A first step towards survivable optical networking will be seen through the introduction of optical rings. This paper presents different types of optical rings (dedicated and shared protection WDM rings) and the planning issues associated with these WDM rings. In particular, we give mathematical models as well as solution methods for the ring loading and wavelength assignment problem. We compare the wavelength requirement of dedicated and shared protection rings under scenarios with different demand patterns. We also discuss the influence of the WDM equipment cost, and present a mathematical model for the optimization of hybrid networks with both dedicated and shared protection rings.     

2G彩铃与3G R4彩铃混合组网方案

本文首先介绍了R4网络,然后分析了2G彩铃和3G R4彩铃的单独组网方案,最后对2G彩铃和3G R4彩铃混合组网进行了研究,并讨论了混合组网方案对彩铃平台性能的要求。     

东信北邮个性化回铃音业务

在目前日益激烈的市场竞争形势下，对移动运营商而言，为了应对竞争，应当立足自身的通信网络基础设施，发挥自己的传统优势，尽快、及时为市场提供方便、快捷和高品质的增值业务服务，使公司在多元化的现代市场环境中处于有利的地位。一个良好增值业务的引入，可以有效塑造移动运营商的服务品牌，吸引和发展用户，提高移动运营商市场的竞争力。个性化回铃音业务是东信北邮信息技术有限公司（以下简称EB）根据移动运营商的实际情况开发成功的一项基于智能网平台的全新增值业务。该业务于2003年3月19日通过中国移动研发中心实验室测试，之后…     

Performance Assessment of Optical Burst Switching Ring and Chordal Ring Networks

This paper presents a performance analysis of optical burst switching (OBS) networks with ring and chordal ring topologies. The performance analysis considers signaling protocols with one-way reservation schemes, being focused on the following protocols: just-in-time (JIT), Jumpstart, JIT⁺, just-enough-time (JET) and Horizon. It is shown that for a network with 20 nodes, the nodal degree gain due to the increase of nodal degree from two (ring) to three (chordal ring) is about three orders of magnitude in the first hop of both topologies, and is between two and three orders of magnitude in the last hop of each topology. It is also shown that the largest chord length gain, in a 20-node OBS network with a chordal ring topology, is slightly less than two orders of magnitude.     

Multicast Capacity of Packet-Switched Ring WDM Networks

Packet-switched unidirectional and bidirectional ring wavelength division multiplexing (WDM) networks with destination stripping provide an increased capacity due to spatial wavelength reuse. Besides unicast traffic, future destination stripping ring WDM networks also need to support multicast traffic efficiently. This article examines the largest achievable transmitter throughput, receiver throughput, and multicast throughput of both unidirectional and bidirectional ring WDM networks with destination stripping. A probabilistic analysis evaluates both the nominal capacity, which is based on the mean hop distances traveled by the multicast packet copies, and the effective capacity, which is based on the ring segment with the highest utilization probability, for each of the three throughput metrics. The developed analytical methodology accommodates not only multicast traffic with arbitrary multicast fanout but also unicast and broadcast traffic. Numerical investigations compare the nominal transmission, receiver, and multicast capacities with the effective transmission, receiver, and multicast capacities and examine the impact of number of ring nodes and multicast fanout on the effective transmission, reception, and multicast capacity of both types of ring networks for different unicast, multicast, and broadcast traffic scenarios and different mixes of unicast and multicast traffic. The presented analytical methodology enables the evaluation and comparison of future multicast-capable medium access control (MAC) protocols for unidirectional and bidirectional ring WDM networks in terms of transmitter, receiver, and multicast throughput efficiency.     

多信道光纤环形网络结构分析

本文对多信道光纤环形网络结构进行了详细分析，推导出环网内平均路经长度和最大直径计算公式，并分析了最佳多信道光纤环网结构。     

适合无线传感器网络的环签名方案

Wireless Sensor Network (WSN) nodes are severely limited by their power, communication band-width, and storage space, and the traditional signature algorithm is not suitable for WSN environments. In this paper, we present a ring signature scheme de-signed for WSNs. In this scheme, all of the wireless sensor nodes are divided into several sub-groups and the sub-group nodes are used to generate the signature instead of the WSN cluster nodes. This scheme can effectively avoid the single node failure problem, and it also has a high availability. All nodes are free to sign their own message, and the nodes that generate signatures can simultaneously calculate their own part of the signature, meeting the distributed parallel com-puting requirements. Compared with the traditional ring signature, this scheme reduces the energy con-sumption, and therefore is very suitable for WSNs.     

基于UMTS R4的多媒体彩铃方案

本文首先对UMTSR4网络进行了简要的概述,然后阐述了3种基于UMTSR4网络的多媒体彩铃方案,最后对这3种方案进行了比较。