七号信令集中监测系统中消息解码的实现

七号信令网是电信网的三大支撑网之一，是电信网的重要组成部分，其应用十分广泛。到目前为止，我国已经建立了由高级信令转接点(HSTP)、低级信令转接点(LSTP)和大量的信令点(SP)组成的三级七号信令网．七号信令网真正成为电信网的神经网和支撑网。为了保证七号信令网的正常高效运行，七号信令集中监测系统作为对七号信令网进行集中监测和管理的工具就显得格外重要。协议分析是七号信令监测平台中实时和历史数据分析的一个重要组成部分，它对获得完整的信令规程分析和实现网络故障精确定位     

七号信令集中监测系统的实现与应用

信令网是现代通信网络的神经中枢,良好的七号信令网能有效的提高呼叫接续质量及接通率等指标,有利于全程全网监控。七号信令集中监测平台是基于整个七号信令网络的实时监测和告警及故障处理系统,本为对七号信令及信令网进行了分析,并对信令集中监测系统的应用提出了自己的观点。     

七号信令集中监测技术浅析

随着七号信令应用的普及以及七号信令网的日益庞大，传统的信令网维护手段(跨接仪表、有限的非实时的交换机报告)已不能适应网络维护的需要。“七号信令集中监测系统”作为电信主网维护的新技术、新手段，将给电信网的维护带来革命性的进步。     

No.7信令监测系统的建设方案

1 No．7信令监测系统简介 No．7信令网用于转接交换网的各种控制信令,是电话网、智能网以及各种新业务的神经和支撑网,是通信网的重要组成部分。目前,越来越多的电信业务需要通过这个支撑网进行接续控制,它的运行质量直接影响到电信网和其它业务网运行的稳定性和实际效益。因此,必须建立完善的No．7信令网维护管理系统,以保证其正常、高效、平稳的运行。因此,No．7信令监测系统作为对No．7信令网进行集中监测和管理的重要工具应运而生。     

基于IP的七号信令网 数据接入系统

本文着重讨论七号信令网与IP网的集成。首先介绍共路信令与随路信令;接下来介绍七号信令系统的基本概念,包括七号信令网的基本功能结构、七号信令网的组成和七号信令网的网路结构;最后以3Com公司的接入服务器为例讲述电信网与IP数据网集成的系统结构。     

七号信令集中监测系统在电信运维中的应用

从我国目前七号信令网的维护管理现状入手,着重介绍新一代的维护监测手段-七号信令集中监测系统,以及如何利用这套系统改善七号信令网的维护管理质量,充分发挥七号信令支撑网的作用。     

基于IP的七号信令网数据接入系统

本着重讨论七号信令网与IP网的集成。首先介绍共路信令与随路信令;接下来介绍七号信令系统的基本概念,包括七号信令网的基本功能结构、七号信令网的组成和七号信令网的网路结构;最后以3Com公司的接入服务器为例讲述电信网与IP数据网集成的系统结构。     

七号信令监测系统在山西铁通的应用

七号信令网是电话网、智能网以及各种新业务的支撑网,是通信网络维护建设的重要组成部分。七号信令网主要用于转接交换网的各种控制信令,是通信网的神经,其重要性不言而喻。为了有效的维护七号信令网,就需要建立七号信令监测系统。七号信令监测系统在日常维护的应用直接关系到整个电信网络的性能和通信质量。     

GSM信令网集中监测系统总体分析与应用

GSM信令网集中监测系统主要针对GSM七号信令网的实际运行情况进行动态监测和分析统计，通过；隹确、有效、实时地获取信令消息，为信令网管理和维护以及移动业务质量监测和分析提供有效的支撑手段。本文将主要介绍GSM信令网集中监测系统的体系结构、技术特点及应用范围。     

消息过滤在移动七号信令集中监测系统中的应用

一、引言 随着中国移动通信网络规模的不断扩大以及各种通信业务的迅速增长,作为现代网络通信的神经枢纽,七号信令网在移动通信中发挥的作用也越来越大,对七号信令网管理和维护的要求越来越高。移动七号信令集中监测系统可以准确、完整、有效地获取信令信息,为信令网管理和维护以及业务质量监测和分析提供有效地支撑手段,有极强的应用价值和广阔的市场前景。消息过滤是移动七号信令监测平台中实时应用部分中七号信令规程分析的一个重要组成部分,它的实现对获得完整的信令规程分析,实现网络故障精确定位,有重要意义。同时,也为协议兼容性测试、有效性测试、工程验收提供有力工具。     

Signaling System No.7 in corporate networks

Corporate network user requirements are identified. The significance of Signaling System No.7 (SS7), in corporate network as a separate backbone signaling system for implementing a robust, flexible and transparent communication network is discussed. The architecture for a corporate network utilizing enhanced signaling is described. The use of SS7 instead of the integrated services digital network primary rate interface (ISDN PRI) is explored. Some SS7 applications in corporate networks are examined     

Signaling System No.7, IS-41 and cellular telephony networking

Globally, the common channel Signaling System No.7 (SS7) has grown and matured over the past five years in two directions. Outside of the US, the development of CCITT Signaling System No.7 (C7) has grown largely due to the need for modern call completion capabilities in national telephone networks. Within the US, SS7 has evolved from the need to provide fast and reliable database services to the support of the custom calling features to the local exchange carrier (LEC) networks. The 1990s will further accelerate the requirements for network solutions to customer needs, especially in the rapidly growing cellular telephony industry. These network solutions are forcing the merger of call delivery and database services in both the SS7 and C7 worlds. The issues, concerns, and difficulties with the merger of these functions are discussed     

Evolving intelligent interexchange network-an SS7 perspective

The role of common channel signaling, referred to as Signaling System No.7 (SS7), in the evolution of services in an interexchange carrier environment is discussed. The importance of SS7 in evolving the intelligent network necessary to support these services is addressed. Interworking with virtual private networks via the out-of-band ISDN messaging channel (D-channel) to extend the capabilities of SS7 network signaling to customer networks is also discussed. For ubiquitous support of ISDN, CLASS, and future services, the interworking of interexchange SS7 with domestic local exchange carriers as well as foreign administrations is critical. This service and intelligent network evolution is described. Emphasis is placed on services and the anticipated migration to those types of services which demand an intelligent interaction and close coupling of both virtual private networks and local public switched networks to the interexchange network     

A REASSEMBLY STRATEGY FOR REDUCING IN/PCS SIGNALLING TRAFFIC

This paper proposes a simple assembly/disassembly part (ADP) for the signalling system no. 7 (SS7) protocol to reduce the signalling traffic loads in intelligent networks (IN) and personal communication service (PCS) networks. The ADP combines two or more messages with the same destinations into a single message, thereby reducing signalling traffic without affecting SS7 protocol operations. The numerical results show that the proposed method can reduce traffic among signalling points 9∼17%.     

基于七号信令集中监测平台的GSM移动用户漫游分析系统

本文对基于七号信令集中监测平台的GSM移动用户漫游分析系统的实现原理和设计方案进行了分析,并对其应用做出介绍.     

七号信令网MTP3层安全机制分析

七号信令网络由于缺乏安全机制而存在诸多安全漏洞。通过分析攻击者如何利用MTP3层的网络管理消息对七号信令网实施攻击,提出用密钥交换协议和认证头协议对MTP3层进行安全保护,从而实现了信令节点间的相互认证和对消息的完整性保护,增强了七号信令网络的安全性。     

A control mechanism to prevent correlated message arrivals fromdegrading Signaling No. 7 network performance

Signaling System No. 7 (SS7) is designed to provide a connectionless transfer of signaling messages of reasonable length. Customers having access to user signaling bearer capabilities as specified in the ANSI T1.623 and CCITT Q.931 standards can send bursts of correlated messages (e.g., by doing a file transfer that results in the segmentation of a block of data into a number of consecutive signaling messages) through SS7 networks. These message bursts with short interarrival times could have an adverse impact on the delay performance of the SS7 networks. A control mechanism, credit manager, is investigated in this paper to regulate incoming traffic to the SS7 network by imposing appropriate time separation between messages when the incoming stream is too bursty. The credit manager has a credit bank where credits accrue at a fixed rate up to a prespecified credit bank capacity. This paper presents simulation results showing delay performance of the SS7 ISUP and TCAP message traffic with a range of correlated message traffic, and control parameters of the credit manager (i.e., credit generation rate and bank capacity) are determined that ensure the traffic entering the SS7 network is acceptable. The results show that control parameters can be set so that for any incoming traffic stream there is no detrimental impact on the SS7 ISUP and TCAP message delay, and the credit manager accepts a wide range of traffic patterns without causing significant delay     

七号信令系统的安全性设计

在Internet和电信网络攻击事件日益频繁的情况下,由于七号信令(SS7)协议是完全公开的,SS7的各层消息也是完全透明的,因而需要考虑信令网的安全性设计问题。介绍了SS7底层的安全脆弱性,提出基于消息传递单元(MSU),采用类似于Internet中IKE与IPSec的信令密钥交换及信令安全封装协议,以解决SS7的安全性问题。     

Signaling System No.7 local exchange deployment

The author examines the deployment of Signaling System No.7 (SS7) from the viewpoint of the local exchange carrier. The three phases of local exchange deployment-service planning and design, local exchange network design, and interconnection design-are discussed in sequence. SS7 is a fundamental change to the infrastructure of the local exchange telecommunications network. The author describes how the backbone network, centered on the signaling transfer points (STPs), is installed first, followed by the local exchange network, and then interconnection to interchange and other networks     

JAIN protocol APIs

JAIN envisions the creation of a number of Java APIs that abstract the details of networks and protocol implementations, and allow for the development of portable applications. The JAIN Protocol Experts Group (PEG) will focus on developing Java APIs for protocols used in telephony, INs, wireless networks, and the Internet. The PEG is organized into an SS7 subgroup and an IP subgroup. The article provides an introduction to PEG. It next describes the JAIN SS7 APIs. It then describes the JAIN IP APIs. The article also explains how JAIN SS7 and IP APIs can be leveraged for the converged SS7-IP networks of the future and describes the JAIN PEG roadmap