CSMA/CA全称carrier sense multiple access with collision avoidance,即载波侦听多路访问/冲突避免,如上文描述,它提供了设备接入信道的规范,适用于无线场景,这里科普一下,与其相对的是有线场景下类似的机制被称为是CSMA/CD,二者存在以下不同点: (1)CSMA/CD是一种检测冲突的机制,CSMA/CA是避免冲突的机制; (2)CAM...
The method is simple, efficient and easy to implement in comparison to point coordination function (PCF), another access method in IEEE 802.11 based on access points (base stations). Simulations are conducted to analyze the proposed scheme. The results show that DCF is able to carry the ...
802.11 wireless networksContentionA random delay timerPositive acknowledgmentThe effect of carrier captureThroughputA mathematical model of access method "carrier sense multiple access with collision avoidance" for two active stations was proposed. The effect of carrier capture and unimodal dependence of the...
The present invention is a procedure that allows configuring a random access IEEE 802.11 wireless network, operating in infrastructure mode (all terminals communicate exclusively with an AP (Access Point)), in such a way that throughput ... AP Grote-Lopez,NG Garrido-Navarro,IC Delgado-Ruz,......
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We’ll now move to a modeling exercise, which you can access by filling out the form below. andprivacy policy. 1. DCF Model Assumptions Let’s get started with the projected figures for our hypothetical company’s EBITDA and free cash flow. In thelast twelve months (LTM), EBITDA was $...
we consider the 802.11 distributed access scheme and we propose a novel approach that enables a station to enter a low-power operational state during chann... V. BAIAMONTE,C.-F. CHIASSERINI - 《Mobile Networks & Applications》 被引量: 58发表: 2006年 A Novel Idle Mode Operation in IEEE ...
针对IEEE802.11的DCF(DistributedCoordinationFunction)效率较低的问题,提出了一种结合速率控制的改进方案——停等DCF及其性能分析模型.速率控制使用自适应调制编码技术给出了可调节业务BER(BitErrorRate)的SNR(SignaltoNoiseRatio)门限确定算法;设置暂停信道接入的最低SNR门限,可减少传输错误,并降低接入冲突;调节BER,可在信...
一种基于802.11 DCF Basic Access机制的移动自组网动态速率控制模型
An important challenge for the implementation of network coding in IEEE 802.11-based wireless networks is to give additional priority for channel access to the relay stations responsible for coding. These relay stations are able to provide more information in a single transmission than those that forw...