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Description: 在网络仿真模拟工具下实现MAC层802.11DCF协议
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Size: 23218 |
Author: kaigo |
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Description: 关于802.11a的matlab仿真，可以用于仿真-on 802.11a Matlab simulation, simulation can be used
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Size: 29696 |
Author: 胡东 |
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Size: 22528 |
Author: kaigo |
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Description: ad hoc networks的802.11dcf小程序-a ieee802.11dcf program for ad hoc networks
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Size: 8192 |
Author: sophie |
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Description: 车载自组网的发展与现状，包括网络结构 主要特点，应用举例，难点与重点，研究现状，物理层参数，MAC 层协议，帧结构，接入方式，802.11DCF，RR-ALOHA，CSMA/CA 和RR-ALOHA 的比较，路由协议
-Vehicle Development and Status of ad hoc networks, including the main features of network structure, application examples, difficulties with focused, current research, physical layer parameters, MAC layer protocol, frame structure, access methods, 802.11DCF, RR-ALOHA, CSMA/CA and RR-ALOHA comparison of routing protocols
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Size: 1007616 |
Author: 张鸿云 |
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Size: 1024 |
Author: 刘谦 |
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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: 在matlab中实现802.11dcf的仿真，以及多种改进方法之后的仿真-with matlab, make 802.11 visual in front of your eyes, and many advanced
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Size: 181248 |
Author: zhangyedong |
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Description: 模拟了IEEE 802.11 DCF基本接入机制，对时延以及吞吐量进行数据统计(The basic access mechanism of IEEE 802.11 DCF is simulated, and data statistics is made for delay and throughput.)
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Size: 166912 |
Author: yunDylan |
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