路由器的设置和使用可能会让一些新手感到困惑，本文olsr路由协议将为您提供简单易懂的路由器指南和使用技巧。

本文目录一览：

• 1、谁能告诉我 在dd-wrt中 olsrd 是什么？
• 2、求帮忙翻译摘要！！！
• 3、多无人机编队通信网络设计与实现
• 4、移动自组织网络路由协议简介
• 5、无线网络路由协议的分类有哪些？
• 6、典型无线自组网路由协议都是有哪些

谁能告诉我 在dd-wrt中 olsrd 是什么？

Optimized Link State Routing Protocol(OLSRP)是一个可以收集链路状态并且能动态计算网络内最佳路由的动态链路协议.

具体资料:

ptimized Link State Routing Protocol

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The Optimized Link State Routing Protocol (OLSR)[1] is an IP routing protocol which is optimized for mobile ad-hoc networks but can also be used on other wireless ad-hoc networks. OLSR is a proactive link-state routing protocol which uses Hello and Topology Control (TC) messages to discover and then disseminate link state information throughout the mobile ad-hoc network. Individual nodes use this topology information to compute next hop destinations for all nodes in the network using shortest hop forwarding paths.

Contents

[hide]

* 1 Features specific to OLSR

* 2 Benefits

* 3 Criticisms

* 4 Messages

o 4.1 Hello

o 4.2 TC (Topology Control)

* 5 Other approaches

* 6 OLSR version 2

* 7 Implementations

* 8 External links

* 9 References

[edit] Features specific to OLSR

Link-state routing protocols such as OSPF and IS-IS elect a designated router on every link in order to perform flooding of topology information. In wireless ad-hoc networks, there is different notion of a link, packets can and do go out the same interface; hence, a different approach is needed in order to optimize the flooding process. Using Hello messages the OLSR protocol at each node discovers 2-hop neighbor information and performs a distributed election of a set of multipoint distribution relays (MPRs). Nodes select MPRs such that there exists a path to each of its 2-hop neighbors via a node selected as an MPR. These MPR nodes then source and forward TC messages which contain the MPR selectors. This functioning of MPRs makes OLSR unique from other link state routing protocols in a few different ways: The forwarding path for TC messages is not shared among all nodes but varies depending on the source, only a subset of nodes source link state information, not all links of a node are advertised but only those which represent MPR selections.

Since link-state routing requires the topology database to be synchronized across the network, OSPF and IS-IS perform topology flooding using a reliable algorithm. Such an algorithm is very difficult to design for ad-hoc wireless networks, so OLSR doesn't bother with reliability; it simply floods topology data often enough to make sure that the database does not remain unsynchronized for extended periods of time.

[edit] Benefits

Being a proactive protocol, routes to all destinations within the network are known and maintained before use. Having the routes available within the standard routing table can be useful for some systems and network applications as there is no route discovery delay associated with finding a new route.

The routing overhead generated, while generally greater than that of a reactive protocol, does not increase with the number of routes being used.

Default and network routes can be injected into the system by HNA messages allowing for connection to the internet or other networks within the OLSR MANET cloud. Network routes are something which reactive protocols do not currently execute well.

Timeout values and validity information is contained within the messages conveying information allowing for differing timer values to be used at differing nodes.

[edit] Criticisms

The original definition of OLSR does not include any provisions for sensing of link quality; it simply assumes that a link is up if a number of hello packets have been received recently. This assumes that links are bi-modal (either working or failed), which is not necessarily the case on wireless networks, where links often exhibit intermediate rates of packet loss. Implementations such as the open source OLSRd (commonly used on Linux-based mesh routers) have been extended (as of v. 0.4.8) with link quality sensing. This is sometimes called "fish-eye" or Radio-Aware OLSR or RA-OLSR and is one of the two protocols included in the 802.11s draft standard. It was influenced by the HSLS protocol.

Being a proactive protocol, OLSR uses power and network resources in order to propagate data about possibly unused routes. While this is not a problem for wired access points and laptops, it makes OLSR unsuitable for sensor networks which try to sleep most of the time. For small scale wired access points with low CPU power, the open source OLSRd project showed that large scale mesh networks can run with OLSRd on thousands of nodes with very little CPU power on 200MHz embedded devices.

Being a link-state protocol, OLSR requires a reasonably large amount of bandwidth and CPU power to compute optimal paths in the network. In the typical networks where OLSR is used (which rarely exceed a few hundreds of nodes), this does not appear to be a problem.

By only using MPRs to flood topology information, OLSR removes some of the redundancy of the flooding process, which may be a problem in networks with large packet loss rates[citation needed] - however the MPR mechanism is self-pruning (which means that in case of packet losses, some nodes which would not have retransmitted a packet, may do so).

[edit] Messages

OLSR makes use of "Hello" messages to find its one hop neighbors and its two hop neighbors through their responses. The sender can then select its multipoint relays (MPR) based on the one hop node which offer the best routes to the two hop nodes. Each node has also an MPR selector set which enumerates nodes that have selected it as an MPR node. OLSR uses Topology Control (TC) messages along with MPR forwarding to disseminate neighbor information throughout the network. Host Network Address (HNA) messages are used by OLSR to disseminate network route advertisements in the same way TC messages advertise host routes.

[edit] Hello

Image:olsr-hello-packet.png

[edit] TC (Topology Control)

Image:Olsr-tc-packet.png

[edit] Other approaches

The problem of routing in ad-hoc wireless networks is actively being researched, and OLSR is but one of several proposed solutions. To many, it is not clear whether a whole new protocol is needed, or whether OSPF could be extended with support for wireless interfaces[2][3].

In bandwidth- and power-starved environments, it is interesting to keep the network silent when there is no traffic to be routed. Reactive routing protocols do not maintain routes, but build them on demand. As link-state protocols require database synchronisation, such protocols typically use the distance vector approach, as in AODV and DSDV, or more ad-hoc approaches that do not necessarily build optimal paths, such as Dynamic Source Routing.

For more information see the list of ad-hoc routing protocols.

[edit] OLSR version 2

OLSRv2 is currently being developed within the IETF. It maintains many of the key features of the original including MPR selection and dissemination. Key differences are the flexibility and modular design using shared components: packet format packetbb, and neighborhood discovery protocol NHDP. These components are being designed to be common among next generation IETF MANET protocols. Differences in the handling of multiple address and interface enabled nodes is also present between OLSR and OLSRv2.

[edit] Implementations

* OLSR.ORG - Downloadable code for OLSR on GNU/Linux, Windows, Mac OS X, FreeBSD and NetBSD systems. Features a great deal of documentation, including an informative survey of related work.

* NRL-OLSR - Open source code of NRL-OLSR. Works on Windows, MacOS, Linux, and various embedded PDA systems such as Arm/Zaurus and PocketPC as well as simulation environments ns2 and OPNET.,

* SOURCEFORGE.NET-OLSR - Created by MOVIQUITY and based on studies within the project Workpad, it offers a code in C# to deploy a MANET (Ad-Hoc, Meshnet) with protocol OLSR. Developed for WM 6, Win XP and can be adapted to other platforms using NET Framework and Compact

[edit] External links

* IETF Home Page The Internet Engineering Task Force standards body

* olsr.funkfeuer.at currently advancing the olsr.org implementation to improve scalability

* Optimized Link State Routing which includes this Flash Demo.

* Freifunk Firmware (English language page) - a firmware based on OpenWRT that uses OLSR, designed to build mesh networks out of wireless access points, e.g. LinksysWRT54G's

* Pyramid Linux - an embedded distro for embedded x86 boards with OLSR, web interface, etc. Primarily used in Community Networks.

* NRL's Networks and Communication Systems Branch - includes project information and open source networking tools and software developed by the U.S. Naval Research Lab.

[edit] References

1. ^ RFC 3626

2. ^ Extensions to OSPF to Support Mobile Ad Hoc Networking, Madhavi Chandra, Abhay Roy, 21-Sep-08, draft-ietf-ospf-manet-or-01.txt

求帮忙翻译摘要！！！

In today's society, people's communication become diverse, the Internet has become an indispensable part in our life. Micro-blog this thing from 2009 to the Chinese has produced changes in turn the world upside down. Micro-blog, micro blog for short, is a word blog, is a relationship based on user information sharing, communication and access platform. The user can through the WEB, WAP and other clients to build their own community, update information in 140 words of text, and realize the sharing. This fresh, interesting, and convenient way to communicate immediately fire all over the Chinese.

To bring joy to people, convenient at the same time, also led to many problems, such as the spread of public opinion, the user information leakage, enterprise micro-blog marketing related problems. This paper discusses various problems, the author micro-blog network copyright. Specifically elaborated the criteria micro-blog network copyright

Identified, and tort liability, the liability of the. In this paper a microwave network copyright legislative, judicial, administrative problems, and summarizes the improvement suggestions. On the micro-blog copyright protection, protection and legal protection, and the blog network copyright and other copyright protection

This paper mainly adopts the dialectical analysis, comparative analysis, historical comparison, comparison between China and foreign countries, research methods of induction and comprehensive system, there will be related to comprehensive case, to better illustrate a point, finally, through the above study, summarized, concluded that the system and the protection system of perfect micro-blog copyright to better protect thousands of micro-blog user's personal rights and interestsrelevant system make people more aware of copyright, so the law to play the biggest effect.

微博与微博著作权Micro-blog and micro-blog copyright

相关认定Correlation recognition

保护现状Conservation status

完善建议Improvement suggestions

把我的选为最佳答案吧，打了很久的字

是否可以解决您的问题？

多无人机编队通信网络设计与实现

空间移动网（SMN）

推进当前空间网和近地网的发展

集群通信网络是无人机编队飞行的核心子系统

2.2 通信网络平台设计

10架有人机、110架无人机（本文以3架四旋翼无人机为通信载体）

2.2.1 无人机系统设计

2.2.2 无线通信

- 路由协议模拟分析（TDMA CSMA）

- MAC协议模拟分析（OLSR AODV）

反应式路由协议

基于Linux操作系统进行开发，利用Qt编译环境设计上位机图形化操控界面

移动自组织网络路由协议简介

MANET 为Mobile Ad hoc network的简称，Ad hoc网络是一种自组织网络。

 由于 MANET 网络中无线通信节点的能量一般都是受限的，通信范围并不能从源节点直接覆盖网络中的所有其他通信节点。节点间进行数据通信时，一般需要其他网络节点的协助，通过 多跳传输 才可以转发到并未直接相连的目的节点，所以路由协议是 MANET 网络关键技术中十分重要的一部分。在传统的通信网络中，路由器一般不移动，很少出现路由器在通信的过程中随意加入或者离开网络的情况，普通的路由协议对于 MANET 这类拓扑频繁动态变化的网络显然是不适用的。因此，有必要针对具体的移动无线自组织网络应用环境的特点，设计相应的 MANET 路由算法。

 如图所示，MANET 网络的路由协议分类方法有很多种，并且新的路由协议也在不断的出现。根据路由发现机制的不同，基本可以被分为表驱动路由协议、按需路由协议以及混合式路由协议三种类型。

又称为 先验式路由协议 。网络中的节点维护一个包含其它网络节点信息的路由表。MANET网络中的每个节点都周期性地广播路由分组，同时通过从网络接收到的路由分组信息，持续更新自身的路由表。在发生网络拓扑结构性改变的时候，通信节点打包更新消息并发送给其它通讯节点，让它们更新最新路由。这样网络中的节点都一直保持准确最新的路由信息，无论是否有数据通信的需要。当有数据转发需求的时候，节点根据自身维护的路由表选择路由，作为发送或者转发数据包的下一跳节点。表驱动路由协议可以实现较低的端到端时延（End-to-End Delay），但是为了计算路由而周期性广播信标会产生较大的网络开销。 DSDV （目的序号距离矢量）协议、 OLSR （优化链路状态路由）协议是此类协议的主要代表。

又称为 反应式路由协议 。当自组织网络中的节点有通信需求的时候，进行路由搜索操作，本身并不保存路由信息。当通讯节点有发送数据包的需求时，该节点将会在网络中进行路由搜索，查找可以到达目的节点的路径；只有找到一条满足条件的可用路径后，数据包的发送过程才执行。把先前获得的路由信息缓存到本地当中，作为后续发送使用，可以加速网络效率。比起表驱动路由，按需路由没有周期性广播控制消息，因此降低了路由开销，极大的节省了网络带宽。按需路由协议有一个缺点是，如果在发送数据包的时候，找不到可用的路由路径信息，需要发起路由搜索。端到端时延（End-to-End Delay）在按需路由协议中可能比较高。 AODV （无线自组网按需平面距离向量路由）协议、 DSR （动态源路由）协议是按需路由协议的主要代表。

混合（分级）路由协议，就是结合上述两种路由协议的优势而得到的一类路由协议。在上文提到的两种路由协议中，所有节点的功能都为平等的，通常来说这两种路由协议都是单层架构的平面路由协议。而在分级路由协议中，层次指的是一个“区”或“簇”，可以采用两种方法来对节点分级。一种分级的方式是隐式的，被称为逻辑分级：每一个网络节点都被包含于某一个本地范围内，而对于本地范围的内部与外部则分别使用不同的路由发现机制。另一种分级的方式是物理分级。首先是构建簇，将那些在地理位置方面具有紧密联系的相关节点构建成一个显式的簇，然后从每个簇中选择出一个节点作为该簇的簇首，选择出的簇首节点与同一个簇内的各个节点都是可以直接进行一跳通信的。网络由若干个节点组成，在层内的节点使用先验式路由算法，在层间节点间则用反应式路由算法。混合路由协议避免了前面两类协议的缺陷：表驱动路由协议中过量的拓扑控制消息流量问题和按需路由协议中的长时延问题。常见的混合路由协议有 ZRP （区域路由）协议、CBRP（分簇路由）协议等。

这是不同于以前提到的三种路由协议。由于目前大量的通信节点都带了定位装置，使这类型协议开始流行。利用位置信息，可以优化的路由性能的自组织网络，再通过限制路由发现的洪泛，以减少拓扑控制消息的数量。 GPSR （贪婪周边无状态路由）和LAR（地理信息辅助路由）路由协议都属于地理位置辅助路由协议。

无线网络路由协议的分类有哪些？

先验式路由协议又称表驱动路由协议，每个网络节点都会维护一张到所有已知目的节点路由信息的路由表。由于会周期性以及根据网络拓扑的变化来随时更新路由表，所以路由表可以准确地反映网络的拓扑结构，但需要消耗一定带宽资源用于维护路由表，如果源节点要发送报文，可以从路由表中立即获得到达目的节点的路由，表驱动路由协议的代表协议有batman-adv、OLSRv2、Babel等。

反应式路由协议又称按需路由协议，是一种需要发送数据时才查找路由的路由选择方式。主机只查找和维护自己需要使用的路由，拓扑结构和路由表内容是按需建立的，这样就不要周期性交换更新信息来维护庞大的路由表，节省了带宽的开销，但建立路由的时间可能较长，按需路由协议的代表协议有AODV、DSR、TORA等。

除了以上两种协议类型，还有结合了两者优点的混合式路由协议，混合式路由协议是在无线Mesh网络规模较大、组成员关系变化快，而少量成员的位置和链路连接状态稳定的条件下提出的，混合式路由协议的代表协议有ZRP等。

典型无线自组网路由协议都是有哪些

当前有很多种自组网路由协议用的最广泛最多的几种如下：

按照请求方式来说：

主动路由协议：OLSR

按需路由协议：AODV

按照层次性路由协议的话，还有二层 三层路由协议

bable协议，batman为三层路由协议，

二层的话有HWMP协议、batman-adv为二层转发协议

目前蒲公英路由器采用Cloud VPN组网技术，比较成熟简单。

了解这些技巧，您可以更好地控制您的网络连接，并获得更快的网络速度和更安全的连接。