Useful resources for ns2

本文列举了多位专家关于ns2(网络模拟器)的研究资源,包括博客、网站和个人项目等。这些资源涵盖了ns2的安装配置、调试技巧及多媒体传输等方面的知识,并推荐了一些有用的论坛和项目。

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Here, I list some useful resources, including people, website, document and projects.

The persons

At home
season, a guy from HIT, he is also the moderator of ns2. I learn a lot from his blog. For example, how to configure your ns2 with tcl-debug and GDB.

smallko, a ph.d from TAIWAN. His personal website should be your guide for ns2. I learn to install ns2.2* from his website. Also, he has prepared to publish a book about ns2. Maybe now it has been published. His research about ns2 is focused on multimedia transportation, etc.


Aliens

Dazhi Chen, a ph.d from USA. His website has collected many good thing about research, ns2,sensor network and ad-hoc.

Pedro Vale, a guy from France. His website will tell you how to extend your tcl-debug, which will be very useful for your tcl debug.

Wangbo, a ph.d from Michigan State University. His homepage collects a lot of resource for ns2 and related field.

Y uanYuan, a ph.d from university of maryland. As Chen, her website has lots of resource for ns2, also, sensor, ad-hoc networks.

Also, there are other resources.

Ke Liu's NS2 Code

Greenw's resource



Forums & Projects

nsnam mailing list
Ns 仿真论坛
Nabble-network Simulator ns-2 forum

The most important, you should learn to use Google to search whatever you want.
### 如何在ICC2中应用Useful Skew进行时序优化 #### 启用Global Skew和Local Skew优化功能 为了利用useful skew特性,需要先启用全局skew以及局部skew的优化选项。通过设置特定的应用参数,可以在编译期间激活这些功能: ```tcl icc2_shell> set_app_options -list {cts.compile.enable_local_skew true} icc2_shell> set_app_options -list {cts.optimize.enable_local_skew true} ``` 上述命令允许工具尝试减小最差情况与最优情况下时钟路径之间的差异(global skew),同时也关注于具体路径上的启动(clock launch)与时钟捕获(capture)间的延迟(local skew)[^1]。 #### 减少OCV影响并移除Clock Reconvergence Pessimism 当构建时钟树结构时,应考虑减少片上变化(On-Chip Variation, OCV)带来的负面影响。为此,可以通过共享更多的缓冲器来降低这种不确定性,并消除因路径重合而导致的时间估算偏差: ```tcl set_app_options -value true ``` 此操作会在后续的报告中显示额外的信息项——即clock reconvergence pessimism去除后的效果评估[^2]。 #### 实施增量放置与优化策略 针对已经完成初步布局的设计文件,采用增量式的调整方法能够更精确地控制关键路径的变化。这通常涉及到对现有设计的小范围修改(ECO),从而实现更好的性能提升而不破坏整体架构稳定性[^3]: ```tcl perform_incremental_placement_and_optimization ... ``` 以上步骤综合起来构成了完整的基于useful skew的时序优化流程,在实际项目开发过程中可以根据具体情况灵活运用各项技术手段达到最佳效果。
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