蓝牙技术的安全机制

一、蓝牙协议 蓝牙体系结构中的协议模型可分为以下5层。（1）物理层:蓝牙协议的无线接口层,其射频系统是跳频系统;（2）核心协议:基带协议（Baseband）、链路管理协议（LMP）、逻辑链路控制和适配协议（L2CAP）、服务发现协议（SDP）等;（3）射频通信协议:RFCOMM;（4）电话传送控制协议:TCS二进制协议、AT命令集等;（5）应用协议（可选协议）:PPP、UDP/TCP/IP、OBEX、vCard/vCarl、FAX、PAN等。     

VoIP协议栈的安全性研究

本文提出对VoIP协议栈的结构分析,包括VoIP信令（SIP协议）,会话描述协议（SDP）,密钥的建立（SDES,,MIKEY,ZRTP）,和SRTP协议,对VoIPx协议栈的相关协议作了简要说明,并分析了其相关的安全性。重点针对SIP、SRTP协议和ZRTP协议分析了其安全隐患并提出相关的改进方案。     

ASON中的GMPLS协议简介

对通用多协议标记交换（GMPLS）协议的三个组成部分（路由协议、信令协议和链路管理协议）的功能分别作了简要介绍.     

CSTA协议分析及实现技术

介绍了CSTA（计算机支持的电信应用）协议的网络模型、协议结构、执行机理和控制流程，以及用来描述协议的ASN.1（抽象语法描述1）语法和BER（基本编码规则），并在此基础上分析了CSTA与智能网（IN）的异同，着重说明了CSTA协议的具体实现技术，编码器和解码器的设计方法。     

基于SIP的Internet电话

文章先给出了基于ＳＩＰ（会话初始化协议）的Ｉｎｔｅｒｎｅｔ电话的协议结构,随后对其中传输数据的ＲＴＰ（实时传输协议）和ＲＴＣＰ（实时传输控制协议）进行了介绍和分析,并对会话初始化协议的组成实体、命名、寻址、操作进行了详细的论述。     

HFC网络中上行信道三种协议的比较

讨论了基于ＨＦＣ（混合光纤同轴电缆）网络上行多址接入信道的数据通信，比较了几种适于ＨＦＣ中ＭＡＣ（媒体输入控制）层上行数据流的协议，包括分布式协议Ｒ－ＡＬＯＨＡ，集中式协议Ｕ－ｎｉＬＮＫ以及一种新的协议ＰＣＵＰ（流水线循环上行流协议）最后得出ＰＣＵＰ协议比较适合ＨＦＣ网中的双向交互式业务的结论。     

基于有色Petri网的英式拍卖会话机制

文章结合FIPA英式拍卖协议（English-Auction-Protoc01），用染色petri网（CPN）为这一协议建模．介绍了Agent按照交互协议进行会话的过程，并依据petri网㈣）理论的矩阵方程式对拍卖中Agent使用协议可能获得利益以及产生冲突的情况进行了分析。     

嵌入式蓝牙协议的数据传输实现

文中首先介绍了蓝牙协议栈中的主机控制器接口（HCI）,服务发现协议（SDP）及逻辑链路控制与适配协议（L2CAP）,并通过一个具体的嵌入式蓝牙数据传输系统,实现了这些协议。文章给出了该系统的硬件框图、软件的总体设计模块（主机控制器接口模块、服务发现模块和数据传输模块）、以及软件设计流程,最终实现了两个蓝牙模块之间的无线数据传输。     

广播电视网络的监控与管理（上）

本阐述了广播电视网络建立网管系统的必要性和迫切性,介绍了ISO网管标准的五大管理功能和网管协议--简单网络管理协议（SNMP）和公共管理信息协议（CMIP）。     

CCSDS空间链路协议体系分析

在CCSDS空间链路层协议上传递IP数据报,实现空间网络和地面网络的无缝连接是未来空地通信发展的主要方向。本文以CCSDS空间链路协议的发展为出发点,分别介绍了常规在轨系统（COS）空间链路协议、高级在轨系统（AOS）空间链路协议和邻近-1（prox-1）空间链路协议的业务类型和功能,分析了协议的层结构、基本原理和关键技术,并对我国开展相关研究提出了建议。     

An Efficient Handover Mechanism Using the General Switch Management Protocol on a Multi‐Protocol Label Switching Network

Using the general switch management protocol on a multi‐protocol label switching network, we present an efficient method for handling handovers. The proposed method directly changes an established path into a new path for supporting a handover. Our investigation reveals the effects of the proposed scheme and demonstrates that this method significantly reduces signaling costs and delays.     

Demonstration of connection-oriented optical burst switching network utilising PLC and MEMS switches

The first demonstration of a connection-oriented optical burst data switching network constructed with PLC and MEMS switches employing GMPLS control is reported. Optical burst data switching in a six-node photonic network using the general switch management protocol (GSMP) is successfully, demonstrated.     

Induction and deduction for autonomous networks

The key issues in network management are the representation and sharing of management information and the automatic management mechanisms based on the underlying information infrastructure. The authors propose a framework, which operates on the standard management information base (MIB) and common management information protocol (CMIP), for a network management system with learning and inference as its management engines. In addition to the general domain knowledge, patterns related to the managed network are learned to enhance the understanding of the network and refine the knowledge base. Facts in object-oriented databases or queries from management applications trigger the inference process on logical rules which are either prespecified knowledge or learned network patterns. Forward inference drives prediction and control, while backward inference directs diagnosis and supports view abstraction. A case study on ATM network topology tuning is presented     

MonitorView：一种电信业务运营支撑系统统一管理体系

针对目前存在的网络运营商内多种业务运营支撑系统并存、难以进行统一管理的问题,研究提出了一种通用的 BOSS 系统应用管理体系 MonitorView。它基于一种面向应用的 Manager-Agent 管理协议,设计实现了一种面向应用管理的通用 Agent 模型和支持异构平台通信的消息中间件 SRB(service request broker),并提出了一种统一的基于元消息的管理消息体系和基于数据库表结构的体系实现,从而实现了面向异构 BOSS 系统管理的一种动态可定制的通用管理应用。     

中兴接入网维护管理系统

本文首先说明了接入网网管的重要性及其一般功能结构,然后较为详细地介绍了中兴接入网网管系统的结构模型、系统设计和管理协议栈,最后介绍了中兴接入网网管系统的主要功能。     

基于SNMP的区分协议流量监控系统

网络流量监控已成为当前网络管理的重要分支之一。通过分析简单网络管理协议（SNMP）和管理信息库（MIB）,针对一般流量监控方法的不足,系统采用SNMP开发包工具即snmp^＋＋提供的二次接口,提出了一种基于SNMP协议实现区分协议流量统计的方法。在此通过技术手段收集流量相关信息,了解网络的性能和局域网对新网络的流量要求,以便于网管员做出精确的网络控制。     

Performance management of multiple access communication networks

This paper focuses on conceptual design, development, and implementation of a performance management tool for computer communication networks to serve large-scale integrated systems. The objective is to improve the network performance in handling various types of messages by on-line adjustment of protocol parameters. The techniques of perturbation analysis of Discrete Event Dynamic Systems (DEDS), stochastic approximation (SA), and learning automata have been used in formulating the algorithm of performance management. The efficacy of the performance management tool has been demonstrated on a network testbed. The conceptual design presented offers a step forward to bridging the gap between management standards and users' demands for efficient network operations since most standards such as ISO (International Standards Organization) and IEEE address only the architecture, services, and interfaces for network management. The proposed concept for performance management can also be used as a general framework to assist design, operation, and management of various DEDS such as computer integrated manufacturing and battlefield C³ (Command, Control, and Communications)     

ANMP: ad hoc network management protocol

We present a protocol for managing mobile wireless ad hoc networks. The protocol uses hierarchical clustering of nodes to reduce the number of messages exchanged between the manager and the agents (mobiles). Clustering also enables the network to keep track of mobiles as they roam. The ad hoc network management protocol (ANMP) is fully compatible with simple management protocol, version 3 (SNMPv3) and uses the same protocol data units (PDUs) for data collection. The protocol also implements sophisticated security mechanisms that can be fine-tuned to meet specific requirements. Finally, we have implemented the protocol along with a graphical user interface that allows a manager to change the view or specify management parameters on the fly     

ATM traffic management in an LMDS wireless access network

We investigate the capacity of LMDS to support ATM services in the local loop. In particular, we evaluate the performance of a MAC protocol for this system when transporting voice and IP traffic using the VBR and GFR service categories of ATM, respectively. Our results show that the MAC protocol is well suited for voice traffic but in general lacks efficient bandwidth management mechanisms to support the more dynamic bandwidth requirements of IP traffic