共查询到20条相似文献,搜索用时 165 毫秒
1.
基于移动IPv6嵌套移动网络中存在的路由优化问题,本质上是由传统互联网的体系结构造成的.在传统互联网体系结构中,IP地址同时代表了节点的身份标识和位置标识,这种双重功能不利于节点的移动.针对这一问题,本文提出一种身份与位置分离的体系结构,IP地址只作为节点的位置标识,引入端点标识符作为通信双方的身份标识,使得当节点的地址改变时通信双方的连接不中断.在该身份与位置分离体系结构基础上,提出一种嵌套移动网络的路由优化机制,利用封装在IPv6逐跳选项报头中的路由更新选项、路由确认选项和路由删除选项进行路由优化.性能分析结果表明,该机制具有较低的报文开销和路由更新时延. 相似文献
2.
3.
移动IP中的路由问题 总被引:2,自引:0,他引:2
与传统的IP技术不同,移动主机IP地址的变化将会引起通信的中断,因此必须解决如带宽与断点连接问题、安全问题、路由问题和用户界面、存储位置感知等一系列问题,本只侧重介绍了移动计算中的路由问题,介绍了支持主机移动的路由系统的基本构成以及几种实现方案。 相似文献
4.
5.
6.
传统TCP/IP网络中的IP扮演着主机标识和路由的双重角色,而主机身份标识协议(Host Identity Protocol,HIP)的出现则引起了网络层次的较大改变,它把IP用来标识主机的功能剥离出来,从而解决了IP地址在网络中由于多种协议需要其标识身份而带来的困难。文中通过将HIP协议应用于移动终端的方式,保证了移动终端在进行网络切换时(改变IP)的通信不中断,从而为异质网络融合提供了基本的技术支持。 相似文献
7.
8.
9.
10.
11.
In the traditional Internet Protocol (IP) architecture, there is an overload of IP semantic problems. Existing solutions focused mainly on the infrastructure for the fixed network, and there is a lack of support for Mobile Ad Hoc Networks (MANETs). To improve scalability. A routing protocol for MANETs is presented based on a locator named Tree-structure Locator Distance Vector (TLDV). The hard core of this routing method is the identifier/locator split by the Distributed Hash Table (DHT ) method, which provides a scalable routing service. The node locator indicates its relative location in the network and should be updated whenever topology changes . Locator space is organized as a tree-structure, and the basic routing operation of the TLDV protocol is presented. TLDV protocol is compared to some classical routing protocols for MANETs on the NS2 platform. Results show that TLDV has better scalability. 相似文献
12.
13.
14.
H. C. Leligou P. Trakadas S. Maniatis P. Karkazis T. Zahariadis 《Wireless Communications and Mobile Computing》2012,12(12):1091-1103
As the applications of wireless sensor networks proliferate, the efficiency in supporting large sensor networks and offering security guarantees becomes an important requirement in the design of the relevant networking protocols. Geographical routing has been proven to efficiently cope with large network dimensions while trust management schemes have been shown to assist in defending against routing attacks. Once trust information is available for all network nodes, the routing decisions can take it into account, i.e. routing can be based on both location and trust attributes. In this paper, we investigate different ways to incorporate trust in location‐based routing schemes and we propose a novel way of balancing trust and location information. Computer simulations show that the proposed routing rule exhibits excellent performance in terms of delivery ratio, latency time and path optimality. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
15.
Architecture for mobility and QoS support in all-IP wireless networks 总被引:14,自引:0,他引:14
Shou-Chih Lo Guanling Lee Wen-Tsuen Chen Jen-Chi Liu 《Selected Areas in Communications, IEEE Journal on》2004,22(4):691-705
Mobility management and quality-of-service (QoS) provisioning are the important tasks on the future development of wireless networks. The high host mobility makes these tasks more challenging. In this paper, we propose an architecture which supports both mobility and QoS management in Internet protocol (IP)-based wireless networks. In mobility management, the fast handoff, which the packets are forwarded in advance to the neighboring locations where a mobile node (MN) may move to, is provided to reduce the service disruption. Also, the fast location lookup, which the routing information about a MN is replicated to some routers, is provided to avoid the triangular routing problem incurred by the protocol of mobile IP. In QoS provisioning, we enable the end-to-end QoS guarantee by using the resource reservation protocol (RSVP) signaling. In particular, the RSVP aggregation technique is used to avoid the scalability problem. Also, the technique of passive resource reservation is used to reduce the influence of host mobility on the resource reservation delay. We emphasize the integration of mobility and QoS management in the architecture design. A performance analysis is given to justify the benefits of our proposed architecture. 相似文献
16.
路由是网络的结构基石,新型网络路由机制是构建新型网络体系的必需。目前网际层的路由本质上是所谓的"单下一跳路由"机制,解决网络传输拥塞问题的一个根本措施在于改变当前网络单下一跳的选路模式,允许多条路径的并行传输。边界网关协议(BGP)是目前Internet唯一采用的域间路由协议,针对当前域间路由系统面临的规模可扩展性问题,文章提出了一个规模可扩展的新型分层域间路由架构(s-idra)。除了可扩展性以外,路由体系还面临其他挑战,比如安全性、服务质量(QoS)、组播、移动、动态网络拓扑等等。路由协议尤其是未来新型信息网络体系结构的路由协议的研究任重而道远。 相似文献
17.
Bin Xie Anup Kumar Dharma P. Agrawal 《Wireless Communications and Mobile Computing》2008,8(9):1129-1148
Integration of ad hoc networks with the Internet provides global Internet connectivity for ad hoc hosts through the coordination of mobile IP and ad hoc protocols. In a pure ad hoc network, it is difficult to establish trust relationship between two ad hoc hosts due to lack of infrastructure or centralized administration. In this paper, an infrastructure‐supported and distributed authentication protocol is proposed to enhance trust relationships amongst ad hoc hosts. In addition, an effective secure routing protocol (SRP) is discussed to protect the multi‐hop route for Internet and ad hoc communication. In the integrated ad hoc networks with Internet accessibility, the ad hoc routing security deployed with the help of infrastructure has a fundamental impact on ad hoc hosts in term of Internet access, integrity, and authentication. Both analysis and simulation results demonstrate the effectiveness of the proposed security protocol. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
18.
The IP/MPLS-based ASON/GMPLS hybrid network architecture enables the interaction between the IP layer and the optical dense wavelength division multiplexing (DWDM) layer. This architecture makes it possible to transfer huge amounts of traffic data on DWDM networks, while supporting Internet Protocol (IP)-based service applications. Additionally, this architecture provides a unified routing scenario, which allows the dynamic routing in both the IP layer and/or optical layer. Cross- layer routing has been addressed in single domain networks scenarios, where the routing policies Physical Topology First (PTF) and Virtual Topology First (VTP) have been proposed and applied. However, applying cross-layer routing using both routing topology policies PTF and VTF has not been investigated in a multi-domain networks scenario yet. In this study, we address this issue and propose a routing scheme to establish traffic connections in the optical WDM layer and the IP layer, which makes the applicability of PTF and VTF in multilayer multi-domain network feasible. 相似文献
19.
《Digital Communications & Networks》2019,5(2):69-75
Information-Centric Networking (ICN) is an innovative paradigm for the future internet architecture, which addresses IP network limitations in supporting content distribution and information access by decoupling content from hosts and providing the ability to retrieve a content object by its name (identifier), rather than its storage location (IP address). Name resolution and routing is critical for content retrieval in ICN networks. In this research, we perform a comparative study of two widely used classes of ICN name resolution and routing schemes, namely flooding and Distributed Hash Table (DHT). We consider the flooding-based routing in Content-Centric Networks due to its wide acceptance. For the DHT scheme, we design a multi-level DHT that takes into account the underlying network topology and uses name aggregation to further reduce control overhead and improve network efficiency. Then, we compare the characteristics and performance of these two classes of name resolution and routing through extensive simulations. The evaluation results show that the performances of these two approaches are reliant on several factors, including network size, content location dynamics, and content popularity. Our study reveals insights into the design tradeoffs and offers guidelines for design strategies. 相似文献
20.
To facilitate content retrieval among NDN domains,a multipath inter-domain routing for named data networking(MIRNDN)was proposed.Under MIRNDN,an AS(autonomous system)maintained merely the routing state of content reachable from its own network or from its customers’ networks and aggregated routing information to mitigate routing scalability issue; “valley free”routing policy was applied to guide Interest packets that solicit content unreachable from the AS’s own network nor from its customers’ networks to explore matching data packets via multiple paths,and NDN’s requests aggregation,in-network caching and adaptive forwarding optimized such exploration; the reachability information of content from multiple paths was collected to support Interest multipath forwarding.The properties of FIB size and the convergence time and communication cost of routing update under MIRNDN were analyzed in theory.The experimental results in the AS level topology of current Internet validates that MIRNDN mitigates the scalability issue of NDN inter-domain routing,has relative short convergence time and moderate communication cost for routing update,and effectively reduces unnecessary Interest forwarding. 相似文献