高效的组播路由是移动自组网网络组播路由的研究热点之一。
In the Mobile Ad hoc network (MANET), the efficiency multicast route is one of hot-study for the network multicast routers.
层叠网络的进一步演进，将进一步融合ip组播和光网络组播。
Overlay networks will integrate multicast capabilities of the IP and optical network.
针对上述问题，本文研究和设计了两种分别适合于IP组播和无线网络组播的源认证方案。
In view of the above problems, this paper researches and designs two multicast source authentication schemes that are suitable for IP multicast and wireless multicast.
提出了覆盖网络组播的链路压力均衡模型和组播树特征伸长度模型，用以评价覆盖网络组播协议的性能。
It is presented the stress equilibrium model and the stretch eigen-value model for evaluating the performance of overlay network multicast protocols.
未来，可以通过降低光网络组播树的粒度来降低光组播的使用门槛，这将有利于促进组播技术的更广泛使用。
In the future, multicast technologies can be promoted through lowering the threshold for multicast applications, that is, decreasing the granularity for an optical network multicast tree.
仿真结果表明：与传统的LEO卫星网络组播路由算法相比，该算法具有较低的计算复杂度，生成的组播路由树具有较小的开销。
Simulations show that the computing complexity and the tree cost are lower than the traditional multicast routing algorithm for LEO satellite networks.
如果网络中的任何主机希望向这个多播组发送消息，但是对接收响应不感兴趣，那么使用ACE_SOCK_Dgram发送消息也可以。
However, if any host in the network wishes to send a message to this multicast group and is not interested in receiving a response, then using ACE_SOCK_Dgram for sending purposes is also sufficient.
本文研究了由MSN节点组成的应用层组播网络，提出了度约束最小直径生成树问题，并给出了求解该问题的BCT算法。
The paper studies the application layer multicast networks of MSNs, and presents a heuristic BCT algorithm for degree-constrained minimum diameter spanning tree problem.
DMA在远程加入的基础上，使用动态选择组播代理和局部隧道的方法，为移动网络内的节点提供组播服务。
Based on Remote Subscription, DMA services the nodes inside the mobile network by using dynamic multicast agent selection and local tunnel.
按照变迁-存根拓扑模型创建网络拓扑，网络节点1200个，代理覆盖中设置16个代理，组播组中最多1024个客户端。
The network topology is created following the Transit-Stub model, consisting of nearly 1200 network nodes, with 16 proxies in the proxy overlay and up to 1024 clients in the multicast groups.
目前由于MPLSVPN网络中很多PE设备尚不支持组播业务，因此在VPN内部署组播业务时遇到了一定的困难。
Now, many PE devices in MPLS VPN network do not support multicast service, as result, it brings difficulty in multicast service.
组播通信有效地节约了网络资源，在无线移动网络环境中引入组播有着非常重要的意义。
Multicast conserves the network resources efficiently, it is significant to provide multicast mechanism in wireless mobile environment.
组播通信可有效地减轻网络负担，避免资源浪费，它是一种十分有效的通信方式。
Multicast communication is a very effective communication mode, which can lighten greatly network loads and avoid wasting resources.
本文中，利用现有的网络设备和条件构建IP组播系统。
In the thesis, conceive IP multicast system which utilize existing equipment and condition of network.
空间信息网络存在不同的通信方式，网络拓扑结构动态多变，对组播密钥管理提出了特殊的要求。
There are many communication ways in space information network(SIN). The network topology changes dynamically, which brings out special requirements for multicast key management.
通过比较三种不同的网络通信方式，阐述IP组播技术在嵌入式视频监控系统网络传输方面的优势。
The paper explains the advantages of IP multicast technology in the network transmission of embedded video monitoring system through comparing three kinds of different network communication ways.
用组播技术进行网上视频广播可以节约带宽和减轻服务器的负载，但往往由于网络互联设备不支持组播功能而不能实现。
Network video broadcast with multicast can save bandwidth and reduce the load of server, but it often can't be realized because the equipments of interlinking networks don't support multicast.
随着网络中组播业务比例的不断增长，交换结构及其调度策略必须能够为组播业务提供良好的支持。
Since multicast traffic exhibits an increasing proportion of traffic on the Internet, switch architecture and scheduling policy must afford good support for multicast traffic.
组播是面向群组接收者的首选网络通信技术，但缺乏安全机制限制了组播在各种网络业务中的广泛应用。
Multicast is the current prime network technique focusing on the group receivers, but the absence of security mechanism has limited its application in various network services.
研究了由MSN节点组成的应用层组播网络，讨论了度约束最小直径生成树(D - MDST)问题，并给出了求解该问题的BCT算法。
The paper studies the application layer multicast networks of MSNs, and presents a heuristic BCT algorithm for Degree-constrained Minimum Diameter Spanning Tree (D-MDST) problem.
第二，路由交换设备必须具有良好的组播支持能力，用于支撑具有动态组播特性的宽带流媒体网络承载业务；
Second, they should be able to support multicast, which can be used for carrying broadband multimedia network traffic with dynamic multicast characteristic.
现就其中组播路由协议对网络性能的影响进行了研究。
The paper performs the study on the influence of multicast route protocol on network performance.
移动组播是移动互联网络技术的一个研究热点，但现有移动组播方案存在着组播中断时间长、协议开销大等问题。
Mobile multicast is a research hotspot of mobile network, but most of mobile multicast schemes suffer from the long multicast disruption time and heavy protocol cost.
网络编码是改善组播通信性能的一种新技术。
Network coding is a new technique which can improve the performance of multicast communications.
但是，在实际应用中网络可能存在多个多播组。
However, in practical applications, there may be several multicast groups in the network.
与IP组播相比，覆盖组播通常会消耗更多的底层网络资源。
Compared with IP multicast, overlay multicast usually consumes more underlying network resources.
论述了组播传输技术的原理和相关的路由协议，设计了一个视频信息的采集系统，分析了实时视频信息组播传输网络。
The paper describes the principle of multicast and its route protocol, designs a system of collecting video data, and analyses a network of real time video data transmission.
论文在设计和实现组播测量系统的基础上，对IP组播网络进行了测量和分析。
After introducing design and implementation of the measurement system, the thesis presents the results from measurement and analysis to the real IP Multicast Network.
论文在设计和实现组播测量系统的基础上，对IP组播网络进行了测量和分析。
After introducing design and implementation of the measurement system, the thesis presents the results from measurement and analysis to the real IP Multicast Network.
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