使用C语言巧妙地实现了纯ALOHA,分槽ALOHA,坚持CSMA,非坚持CSMA, P坚持CSMA协议的模拟仿真。其中的思想来自授课老师的传授，在此表示感谢。希望能与同志们一起分享。

matlab进行HARQ协议仿真，采用汉明码纠错编码，BPSK调制，分析BER和SNR的关系

通信系统仿真熟悉CSMA、ALOHA或者CSMA/CA协议，采用Matlab 或者C 语言编写程序，对其中一种自由竞争接入协议在随机布点、不同节点数、不同覆盖范围和不同退避机制等条件下进行网络性能分析.

This is a simulation of LEACH (Low-Energy Adaptive Clustering Hierarchy), a well-known cluster-based protocol for sensor networks with an extension to make it solar-aware. This simulation was created for the following paper: Thiemo Voigt, Hartmut Ritter, Jochen Schiller, Adam Dunkels, and Juan Alonso. Solar-aware Clustering in Wireless Sensor Networks. In Proceedings of the Ninth IEEE Symposium on Computers and Communications, June 2004. http://www.sics.se/~thiemo/iscc2004Final.pdf Abstract: "Energy conservation plays a crucial in wireless sensor networks since such networks are designed to be placed in hostile and non-accessible areas. While battery-driven sensors will run out of battery sooner or later, the use of renewable energy sources such as solar power or gravitation may extend the lifetime of a sensor network. We propose to utilize solar power in wireless sensor networks and extend LEACH, a well-known cluster-based protocol for sensor networks to become solar-aware. The presented simulation results show that making LEACH solar-aware significantly extends the lifetime of sensor networks." The code contains two directories: one is a distributed LEACH version, the other one a centralized where the base station (assumed to know everything) chooses the optimal cluster head. The "optimal" is in the code approximated via rules that include some kind of geopgraphical criteria among others. In solar.h you choose if you want to have solar turned on or not and also set some other parameters. To compile on Linux: opp_makemake -f -N make On Windows with Visual C++: opp_nmakemake -f -N nmake -f Makefile.vc Hope you find the model useful. Thiemo Voigt (thiemo@sics.se) (model packaged by Andras Varga)

自己做的演示用的PPT，介绍NS2入门知识，NS2的结构和实现机制，最后对MTE，LEACH和LEACH-C用NS2模拟，得出仿真结果，分析曲线

leach协议的MIT源码及详细仿真过程（亲测可用，内含实验文档和数据分析）。

协议仿真IEC-101_103_104_CDT_SPA(ABB)_MODBUS