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Description: 本文首先通过Bianchi模型，对标准DCF算法的性能作出全面定量分析，然后提出提高无线接入点通信能力的DCF改进算法，同时还提出改进算法的二维离散时间Markov模型并作了定量分析。随后设计原协议和改进协议的仿真算法，并使用Matlab仿真工具进行算法的仿真实验，并对它们的仿真结果作对比。理论和仿真结果都证明改进算法可以大幅度提高网络整体性能。
在对标准DCF算法作性能分析的过程中，作者注意到网络的性能随活动无线节点数量的增加衰减较快。主要原因在于网络负载较大时，冲突发生率高，但可以通过加快竞争窗口增加速度来减小冲突发生率，于是设计了基于活动无线节点数量的自适应X进制退避算法。随后作出的理论与仿真结果都证明这种算法可以在活动节点数量较大时一定程度上提高网络性能
-In this thesis, the performance of the original IEEE 802.11 DCF is quantitatively analyzed through Bianchi’s model. Whereafter an approache to alleviate this problem is proposed. Theoretical analysis and related simulations is performed. The results show that our proposed methods can improve DCF perofrmance in WLAN by a large margin (compared with the original standard).
In the process of analyzing the performance of the original DCF, another problem was heeded that the DCF performance reduces with increasing number of active stations in the network.The main reason of this problem is the high probability of collision, when the load of the network is high. This problem can be solved by speeding up the process of contention window incressing. A new algorithm is designed in which the active stations can adapt their backoff exponent to the channel conditions dynamically. The theoretical analysis is performed and its accuracy is valuated by related simulations.The effective througuput of t
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Size: 2873344 |
Author: liming |
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Description: 快速生成树IEEE标准，对802.1d-1998的改进，兼容生成树stp算法-Rapid Spanning Tree IEEE standards, the improvement of 802.1d-1998, compatible stp spanning tree algorithm
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Size: 1209344 |
Author: gllw |
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Description: 该文件含有在ubuntu下的802.11e安装文件以及安装时常见问题的解决方法。
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Size: 86084 |
Author: wq123_@126.com |
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Description: 802.3相关协议，2.5G/5G/25G/40G/100G(802.3 related protocols, include 2.5G/5G/25G/40G/100G)
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Size: 14194688 |
Author: jasonwucaidai
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Description: WLAN 802.11ax最新协议标准。(802.11ax specification)
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Size: 2062336 |
Author: JaredYang
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Description: standard of 802.11ac specification
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Size: 2933760 |
Author: longvt
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Description: 以太网传输标准IEEE Standard802.3-2012，全英文(Ethernet transmission standard IEEE 802.3-2012)
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Size: 25799680 |
Author: 斯文小卡
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Description: ieee 802.3 part 1-6 规范，仅供需要的工程师参考(ieee 802.3 part 1-6 specification, for engineer who needs this document to reference)
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Size: 25608192 |
Author: risc
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Description: 802.11a/g协议详解，非扫描版本，作为802.11协议学习和使用的非常好的资料(802.11a/g protocol detailed, non scanning version, as the 802.11 protocol to learn and use of very good data)
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Size: 7318528 |
Author: veally
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Description: 用MATLAB仿真组帧，帧结构采用协议802.11a(The frame structure is simulated with MATLAB, and the frame structure adopts the protocol 802.11a)
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Size: 5120 |
Author: haibenben
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Description: tcl file for 802.11 impelemention in ns2
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Size: 1024 |
Author: ali342
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Description: 802.11 WLAN Channel Model
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Size: 4096 |
Author: elkassas |
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Description: 包含802_11p.cc、802_11p.cc、ofdm.cc等文件，添加在ns2中，可以实现802.11p的功能(In ns2 added to achieve the function of 802.11p)
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Size: 21504 |
Author: 小李_rui |
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Description: 实现802.11的物理层仿真，可以通过仿真更好的认识学习信号的编码传输(Realization of 802.11 physical layer simulation)
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Size: 193536 |
Author: A_NOcoo |
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Description: 802.11仿真实例，挺好用的，可以学习参考，单本小白还没琢磨透OPNET的运行规则，因此不知道如何运行实例(802.11 simulation example, it is very good to use, you can learn to refer to, single little white has not thought through the OPNET operation rules, so do not know how to run an example.)
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Size: 1372160 |
Author: Matthewwcy |
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Description: 毕业设计资料 802.11n物理层仿真源文件和论文 仿真是用matlab2017a做的 实际官网有仿真模型 只是把它调试得可以运行了 免费送给各位老哥了~(Graduation design information 802.11n physical layer simulation source files and papers are free to all of you guys.)
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Size: 1114112 |
Author: swust_hy |
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Description: 802.11a的仿真代码,可调整参数，设置调制解调方式(802.11a simulation code, the adjustable parameters, modulation and demodulation is provided)
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Size: 29696 |
Author: kenzo |
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Description: Proposed 802.11ax Functional Requirements
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Size: 101376 |
Author: emaildq@163.com |
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Description: IEEE Standard for Ethernet 802.3 2015
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Size: 5488640 |
Author: foobie |
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Description: 802.11n信道建模代码，功能齐全，有官方说明(802.11n channel modeling code with complete functions and official instructions)
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Size: 2780160 |
Author: YYTT12138 |
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