Description: 介绍无线网络系统链路层的退避算法,及对综合效益的评估-Introduction of wireless network system of link layer backoff algorithm, and comprehensive benefits assessment Platform: |
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Author:chary |
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Description: CSMA/CD仿真代码，千兆以太网以前版本中统一采用的争用方法，以此来决定对媒体访问权，里面涉及到了退避算法等。可在opnet环境下实现，经验证通过。-CSMA/CD simulation code, Gigabit Ethernet previous versions used to compete for a unified approach, in order to decide on the right of media access, which relates to the backoff algorithm. OPNET environment can be achieved through the experience card. Platform: |
Size: 121856 |
Author:cquptliuhui |
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Description: 在Ad hoc网络中节点随机移动的情况下，对二进制指数退避算法进行了分析，在此基础上提出了一种新的退避进制（newBEB），对新算法进行了仿真分析，仿真结果表明，新的退避算法能提高移动情况的Ad hoc网络的公平性．-In Ad hoc networks of mobile nodes random circumstances, of the binary exponential backoff algorithm analysis, on this basis proposes a new backoff hexadecimal (newBEB), a new algorithm for the simulation analysis, simulation results show that new backoff algorithm can improve the movement of the Ad hoc network fairness. Platform: |
Size: 214016 |
Author:卡卡 |
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Description: CSMA / CD simulation code, Gigabit Ethernet previous versions used to compete for a unified approach, in order to decide on the right of media access, which relates to the backoff algorithm. OPNET environment can be achieved through the experience card.-CSMA/CD simulation code, Gigabit Ethernet previous versions used to compete for a unified approach, in order to decide on the right of media access, which relates to the backoff algorithm. OPNET environment can be achieved through the experience card. Platform: |
Size: 60416 |
Author:angel |
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Description: IEEE关于WiMAX的论文Combining random backoff with a cross-layer tree algorithm for random access in IEEE 802.16-IEEE paper on WiMAX of Combining random backoff with a cross-layer tree algorithm for random access in IEEE 802.16 Platform: |
Size: 146432 |
Author:徐海荣 |
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Description: 二进制退避算法，计算机网络中以太网所采用的碰撞处理算法的VB仿真，主要价值在于从概率学的角度计算成功发送的概率-Binary backoff algorithm, computer network Ethernet collision processing algorithms used in simulation of VB, the main value lies in the probability of learning from the perspective of calculating the probability of successfully sent Platform: |
Size: 7168 |
Author:tanisaber |
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Description: Ethernet帧的发送采用带有冲突检测的载波侦听多路访问（CSMA/CD）方法。CSMA/CD的发送流程可以概括为以下四点：先听后发，边听边发，冲突停止，延迟重发。当其中检测到冲突时就需要考虑如何处理该冲突。本程序提出了一种冲突退避算法。-Ethernet frames to send used with Collision Detection Carrier Sense Multiple Access (CSMA/CD) method. CSMA/CD the sending process can be summarized as the following four points: first, hear hair, listened hair, the conflict to stop, delay re-issued. When one detects a conflict between the need to consider how to deal with the conflict. This experiment presents a conflict of backoff algorithm. And through programming the algorithm. Platform: |
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Author:王衎 |
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Description: 本文详细介绍了基于802.11mac协议的研究，提出了一种新的退避算法和拥塞控制策略，使网络的性能得到极大的改善。-This paper describes research on 802.11mac agreement, proposed a new backoff algorithm and congestion control strategy, the network' s performance is greatly improved. Platform: |
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Author:王影 |
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Description: 讲解802.11系统的dcf功能，以及其中的退避机制，各种退避算法！-802.11 dcf to explain the system function, and one of the backoff mechanism, various backoff algorithm! Platform: |
Size: 994304 |
Author:lovol |
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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 Platform: |
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Author:liming |
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Description: 该文在大量测试实验和理论分析的基础上，研究电磁波在楼内公共烟道的传输问题，分析公共烟道环境的特殊性以及影响电磁波传输损耗的因素。提出一种适用于楼宇集中净化物联网系统的基于SX1278的无线传输方案。该方案采用直接序列扩频调制来提高系统的抗干扰性能，采用截断二进制指数退避算法作为重传机制来解决节点信号冲突碰撞问题。通过在基站端采用时间片轮转调度，来保证计数的同步性和实时性。集成测试和实地测试结果表明，该方案很好地解决了烟道内无线信号的稳定传输问题，且丢包率和误码率较低，系统可靠性好。-On the basis of experimental and theoretical analysis of a large number of tests on the study of electromagnetic waves in the building of public flue transmission problems, analyze the particularity of public flue environment and factors affecting the electromagnetic transmission loss. Is proposed for building things centralized purification system based on wireless transmission scheme SX1278' s. The program uses direct sequence spread spectrum modulation to improve anti-interference performance of the system, using the truncated binary exponential backoff algorithm as the retransmission mechanism to resolve conflicts node signal collision. The base station side by using round-robin scheduling to ensure counting and real-time synchronization. Integration testing and field test results show that the program solves the problem of stable transmission of radio signals within the flue, and the packet loss rate and the error rate is low, better system reliability. Platform: |
Size: 758784 |
Author:jerry |
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Description: 二进制退避算法，计算机网络中以太网所采用的碰撞处理算法的VB仿真，主要价值在于从概率学的角度计算成功发送的概率-Binary backoff algorithm, computer network Ethernet collision processing algorithms used in simulation of VB, the main value lies in the probability of learning the perspective of calculating the probability of successfully sent Platform: |
Size: 7168 |
Author:xing749137 |
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