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CSMA

CSMA的相关文献在1986年到2022年内共计191篇,主要集中在无线电电子学、电信技术、自动化技术、计算机技术、电工技术 等领域,其中期刊论文80篇、专利文献111篇;相关期刊70种,包括中国科学技术大学学报、吉首大学学报(自然科学版)、四川师范大学学报(自然科学版)等; CSMA的相关文献由460位作者贡献,包括李宇、黄海宁、张军等。

CSMA—发文量

期刊论文>

论文:80 占比:41.88%

专利文献>

论文:111 占比:58.12%

总计:191篇

CSMA—发文趋势图

CSMA

-研究学者

  • 李宇
  • 黄海宁
  • 张军
  • 刘磊
  • 张一晋
  • 张春华
  • 俞凯
  • 孙兴华
  • 张昌伟
  • 朱洪波
  • 期刊论文
  • 专利文献

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    • Bilal Khan; Danish Shehzad; Numan Shafi; Ga-Young Kim; Muhammad Umar Aftab
    • 摘要: Nowadays multiple wireless communication systems operate in industrial environments side by side.In such an environment performance of one wireless network can be degraded by the collocated hostile wireless network having higher transmission power or higher carrier sensing threshold.Unlike the previous research works which considered IEEE 802.15.4 for the Industrial Wireless communication systems(iWCS)this paper examines the coexistence of IEEE 802.11 based iWCS used for delay-stringent communication in process automation and gWLAN(general-purpose WLAN)used for non-real time communication.In this paper,we present a Markov chain-based performance model that described the transmission failure of iWCS due to geographical collision with gWLAN.The presented analytic model accurately determines throughput,packet transaction delay,and packet loss probability of iWCS when it is collocated with gWLAN.The results of the Markov model match more than 90%with our simulation results.Furthermore,we proposed an adaptive transmission power control technique for iWCS to overcome the potential interferences caused by the gWLAN transmissions.The simulation results show that the proposed technique significantly improves iWCS performance in terms of throughput,packet transaction,and cycle period reduction.Moreover,it enables the industrial network for the use of delay critical applications in the presence of gWLAN without affecting its performance.
    • Shams Al Ajrawi; Ramesh Rao; Mahasweta Sarkar
    • 摘要: Brain computer interface(BCI)systems permit individuals with motor disorders to utilize their thoughts as a mean to control external devices.BCI is a promising interdisciplinary field that gained the attention of many researchers.Yet,the development of BCI systems is facing several challenges,such as network lifetime.The Medium Access Control(MAC)Protocol is the bottle-neck of network reliability.There are many MAC protocols that can be utilized for dependable transmission in BCI applications by altering their control parameters.However,modifying these parameters is another source of concern due to the scarcity in knowledge about the effect of modification.Also,there is still no instrument that can receive and actualize these parameters on transmitters embedded inside the cerebrum.In this paper,we propose two novel MAC protocols using passive UHF-RFID,the proposed protocols provide efficient and reliable communication between the transmitters and the receiver.The UHF-RFID transmitters were used because they are energy efficient which makes them compatible with BCI application.The first protocol is designed for the EEG signals.While the second protocol was designed for the ECoG signals.The evaluation results showed the validity of the proposed protocols in terms of network performance.The results also proved that the protocols are suitable and reliable for designing efficient BCI applications.
    • ZHAN Gang; DING Hong-wei; LIU Qian-lin; YANG Zhi-jun; ZHOU Sheng-jie
    • 摘要: 智能交通的出现使得车辆自组织网络受到越来越多的关注.车辆自组织网络的动态拓扑结构变化非常剧烈,这对网络的吞吐率、传输速率等性能提出了很高的要求.提出1种具有握手机制协议的自适应多通道双时钟NP-CSMA随机多址接入协议.该协议首先区分2种P-CSMA协议,握手机制成功解决了隐藏的终端问题,双时钟机制减少了平均空闲时间,多通道机制增加通道数量和划分用户优先级的同时提高了系统吞吐率,自适应机制能够使系统在高负载下保持稳定吞吐率.还对该协议的传输速率进行了分析,得出该协议的传输速率相对较高的结论.通过平均周期方法推导吞吐率和传输速率的计算公式,仿真结果与理论推导一致.
    • 范毓林
    • 摘要: 无线局域网络(Wireless Local Area Networks,WLAN)是指采用无线媒体或介质,利用射频技术,在一定的区域内所形成的无线网络.无线局域网络使得用户得以摆脱网线等物理传输媒介的束缚,在无线局域网络覆盖的范围之内,能够低成本、高速、便捷地访问互联网或局域网.如今无线局域网已经进入寻常百姓家,为人们的生活带来极大便利.本文将从无线局域网的产生、发展、关键技术、应用和发展趋势五个方面对无线局域网进行分析和介绍.
    • 占港; 丁洪伟; 保利勇; 官铮; 何敏
    • 摘要: 为了提高无线传感器网络节点的能量利用率,提出一种新型CSMA随机多址协议.首先运用平均周期法求出吞吐率、传输速率、时延和能耗的数学表达式.其次加入多通道和优先级机制,使系统能够根据节点的负载分配适当的服务等级与信道资源.然后引入双时钟机制,减少系统的平均空闲周期时间,从而提高吞吐率.最后引入自适应机制,使系统的吞吐率和能耗能够维持稳定.仿真实验表明,仿真值与理论值一致,并且随着信息分组到达率的不断增加,新协议的吞吐量与能量有效性优异,证明了该协议能够有效地提高传输效率,减少能耗,可运用到无线通信领域.
    • 王立城
    • 摘要: 针对电力线通信信号强度和时延指标无法准确测量,且网络建立过程中缺少路径权值和方向的问题,文章提出了基于AMI测量参数的路径指标间接测量方法.从AMI系统的智能电能表和集中器获取线路电压、电流、相位等测量参数,并以台区负荷中心的测量值为参考,利用基尔霍夫定律计算出不同相线测量点的电压损失大小和方向,也可结合线路材质参数计算出线路距离,从而实现了通信网络路径权值和方向的间接测量.为了验证方法的有效性,提出了一种采用AMI测量参数的p-persistent CSMA洪泛路由算法,实验证明该方法可有效缩短电力线通信网络路径深度和网络时延.%In current power line communication(PLC)networks,there still exists great difficulty to measure the sig-nal power and the time delay,and the lack of effective path weights and direction is also a problem in the process of network establishment.Aimed to solve these problems,this paper proposes an indirect measuring method based on the AMI measuring parameters.By obtaining the circuit voltage,current,and phase parameters from the smart meters and concentrator of AMI system,the value of circuit voltage loss and the voltage direction can be calculated according to Kirchhoff's law,which belongs to the different phase line based on the load center of the low voltage distribution net -work.Moreover,the power line distance can also be achieved based on the material parameters, and the indirect measurement of the communication network path value and direction can be realized.In order to verify the effective-ness of the method,this paper proposes a p-persistent CSMA flooding network scheme based on AMI parameters.Ex-perimental results show that the application of AMI parameters plays an important role on reducing the depth of the re -lay and improving the networking delay.
    • Dongbi Zhu; Yang Chen; Yihu Xu
    • 摘要: We consider a carrier sense multiple access (CSMA) in an unslotted cognitive radio network with random residence time. In this system, if an arriving secondary user (SU) does not find any idle channels, then the SU either enters the back-off group or gives up its service and leaves the system. SUs in the back-off group have random mobility, so may re-access the channel after random time or go to the other network after random residence time. We model the system by 3-demensional Continuous Time Markov Chain (CTMC) and obtain the steady state probability of the system by matrix analytic method. In numerical results, we compare the performance of two systems with and without residence time of SUs. It is shown that the random mobility of SUs has an impact on the performance of SUs in cognitive radio networks.
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