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检索条件"主题词=Anti-collision algorithm"

共 99 条记录，以下是71-80 订阅

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Parametric Heuristic Schemes for Performance Improvement in Frame Slotted Aloha based RFID Systems

Parametric Heuristic Schemes for Performance Improvement in ...

引用

International Conference on ICT for Smart-Society (ICISS)

作者： Dhakal, Sunil Shin, Seokjoo Chosun Univ Dept Comp Engn Kwangju South Korea

ISBN: (纸本)9781479901456

The performance of the Dynamic Frame Slotted Aloha (DFSA) based RFID anti-collision algorithm depends on the dynamically controlled frame size with the contending tags. Many literatures exploit the tag estimation method and attempt to enhance the system performance by regulating the frame size equal to the estimated tags. Unless the contending tag population is exactly estimated and the frame size is optimally adjusted the system performance cannot be maximized. However, it is always a difficult task to precisely estimate the contending tags in RFID systems. Thus to maximize the system performance, we used a parametric heuristic approach and proposed two simple schemes, namely ID-FSA (Improvised Dynamic-FSA) and ERP-FSA (Exponential Random Partitioning-FSA) algorithms. Unlike other algorithms, ID-FSA algorithm adjusts the optimal frame length for estimated tag population and ERP-FSA adjusts the contending tag population in such a way that the applied static frame size becomes optimal. The performance of our parametric heuristic schemes reveals that there are some potential benefits that can be achieved by adjusting the tags equivalent to the optimal frame length, moreover, regulating the optimal frame length for estimated tags can maximize the system performance.

关键词： RFID system anti-collision algorithm Frame Slotted Aloha Optimal Frame Length Tag Estimation

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Design of the Electronic Tags in a Container RFID System

Design of the Electronic Tags in a Container RFID System

引用

9th International Symposium on Distributed Computing and Applications to Business, Engineering and Science (DCABES 2010)

作者： Guo Xing Wang Guoxian Xiao Hanbin Wuhan Univ Technol Sch Logist Engn Wuhan 430070 Hubei Province Peoples R China

ISBN: (纸本)9780769541105

This paper presents a case study to apply the RFID (Radio Frequency Identification) technology to dynamically track miscellaneous logistics information of the shipping containers to improve the container transportation management and digitalization level. The system architecture and configuration of the RFID system are illustrated and the requirements of the container RFID system are characterized. The hardware circuit of the electronic tags in an active RFID system is designed. The tags designed are of small volume and low power consumption with an identification sensitive distance up to 20m. The anti-collision mechanism for the electronic tags is discussed and an adaptive anti-collision algorithm based on the slotted ALOHA algorithm is proposed. The proposed algorithm proves that it is effective to improve the message channel utilization rate and the tag identification rate.

关键词： Radio Frequency Identification electronic tag anti-collision algorithm time slot

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Design of 433MHz Low Power anti-collision RFID System

Design of 433MHz Low Power Anti-Collision RFID System

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IEEE International Conference on Automation and Logistics

作者： Guo, Yue Hou, Ligang Geng, Shuqin Wu, Wuchen Beijing Univ Technol VLSI & Syst Lab Beijing 100022 Peoples R China

ISBN: (纸本)9781424425020

A design method of low power anti-collision RFID system is presented in this paper. The system power consumption is effectively reduced by circuit design and work mode selecting. An improved anti-collision algorithm is used in the system, reducing both the tag collision probability and the power consumption. The design method has been used in a 433MHz RFID system, enhancing the identification efficiency and reducing the system power consumption successfully.

关键词： RFID low power anti-collision algorithm

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Design of and Research on an Attendance System Based on RFID and WSN Technologies for the Rail Transportation Industry 3rd

Design of and Research on an Attendance System Based on RFID...

引用

3rd International Conference on Electrical Engineering and Information Technologies for Rail Transportation (EITRT)

作者： Liu, Chongjun Fan, Kuangang Pan, Yi Ren, Yindong United Automot Elect Syst Co Ltd Syst & Elect Control Unit NE1 Shanghai Peoples R China Jiangxi Univ Sci & Technol Sch Mech & Elect Engn Ganzhou Jiangxi Peoples R China

ISBN: (纸本)9789811079894;9789811079887

To address the serious conflict and poor reliability issues in existing radio-frequency identification (RFID) systems, a complete set of remote wireless noncontact attendance system was designed using a 2.4 GHz active RFID system as the terminal reading device for recording employee attendance information. Combined with a wireless network architecture provided by a wireless sensor network, the system wirelessly transmits attendance information to a remote computer control system, thereby effectively improving the cumbersome wiring, poor mobility, and expansibility faults of the cable-contacted attendance system used in the Rail Transportation industry. Consequently, production safety and personnel attendance management become more convenient. The client management system communicates using LabVIEW development tools with the SQL SERVER 2008 database to achieve attendance management functions. To address the electronic tag collision problem in an active RFID system, an improved framed-slotted ALOHA anti-collision algorithm was proposed by combining the original algorithm with dynamic grouping ideas, thereby improving RFID system performance and efficiency.

关键词： Rail transportation attendance system RFID WSN LabVIEW anti-collision algorithm

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Cardinality Estimation-based Adaptive Multi-tree Splitting algorithm for RFID System

Cardinality Estimation-based Adaptive Multi-tree Splitting A...

引用

International Conference on Measurement, Instrumentation and Automation (ICMIA 2012)

作者： Tan, Yong Liu, Guixiong Wu, Guoguang S China Univ Technol Sch Mech & Automot Engn Guangzhou 510640 Guangdong Peoples R China

ISBN: (纸本)9783037855454

This paper proposes a cardinality estimation-based adaptive multi-tree splitting (CEAMS) algorithm. Tag number is estimated by using the depth information obtained from the first tag identification and adaptively assigns the splitting strategy according to the splitting subset rule table. Simulation results show that the average total number of timeslots can be reduced by 65% compared with DBS and the system throughput is about 0.52 when the number of tags ranged from 5 similar to 1000.

关键词： RFID anti-collision algorithm Tag number estimate Adaptive multi-tree splitting

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Design and Research of Distribution Equipment and Asset Management System Based on Internet of Things Technology 2

Design and Research of Distribution Equipment and Asset Mana...

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2nd IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Qian, Yulin Zhang, Kexin Cao, Lianlian Zhang, Zhihao NARI Grp Co Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781538685495

Distribution equipment and physical assets of a wide range, a large part of the distribution network equipment in the long-term operation in the outdoor environment, bear the role of mechanical load and power load at the same time, but also bear the natural external forces. The above factors will promote the aging of the components, corrosion and oxidation, if not timely detection and elimination of equipment components of the security risks, will affect or even endanger the safe operation of power systems. With the rapid development of wireless communication technology in recent years, RFID is more and more widely used as a radio frequency identification technology. The combination of RFID and power system asset management can greatly reduce the manual operation and improve the efficiency of material and equipment management. This paper designs an asset management system of distribution network equipment based on RFID technology, analyzes the system information security technology, adopts the lightweight security authentication protocol of two-way message mutual authentication to enhance the security performance, and finally gives an improved anti-collision algorithm for binary search to enhance the system's multi-tag recognition efficiency and accuracy.

关键词： IoT rfid asset management smart grid security authen-tication protocol anti-collision algorithm

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Probability Model of Time to collision Considering Sensor Accuracy 33

Probability Model of Time to Collision Considering Sensor Ac...

引用

33rd Chinese Control and Decision Conference (CCDC)

作者： Lei, Yang Huang, Zhiling Cen, Ming Chongqing Univ Posts & Telecommun Sch Automat Chongqing 400065 Peoples R China

ISBN: (纸本)9781665440899

The intelligent vehicle anti-collision system can effectively slow down or avoid the occurrence of traffic accidents and improve the driving safety of the vehicle. The time to collision (TTC) algorithm is not sufficient in anti-collision algorithm when the accuracy characteristics of different sensors are ignored. Therefore, this paper proposes an improved TTC threshold calculation method considering the influence of sensor detection error. In view of the influence of sensor detection error, a TTC probability model is constructed. In this model, the host vehicle (HV) speed, the target vehicle (TV) speed and the relative distance between them are regarded as a random process, and their distribution functions are established. Subsequently, these parameter distribution functions are used to construct the TTC probability model that approximates the normal distribution by Geary-Hinkley transformation. This model uses the collision probability index to calculate more reasonable TTC threshold. Experimental results were produced and comparative analyses were conducted for different cases. The obtained results confirm the effectiveness of the proposed TTC probability model.

关键词： Intelligent Vehicle anti-collision algorithm TTC Threshold Probability Model

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A Dynamic Detection Point Frame Length Adjustment Method for RFID anti-collision 3rd

A Dynamic Detection Point Frame Length Adjustment Method for...

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3rd European-Alliance-for-Innovation (EAI) International Conference on IoT as a Service (IoTaaS)

作者： Feng, Xiaoning Wang, Zhuo Yan, Bijun Han, Guangjie Wang, Feng Song, Xue Harbin Engn Univ Coll Comp Sci & Technol Harbin 150001 Peoples R China Harbin Engn Univ Coll Shipbldg Engn Harbin 150001 Peoples R China Hohai Univ Dept Informat & Commun Syst Changzhou Peoples R China Changzhou Univ Sch Informat Sci & Engn Changzhou 213164 Peoples R China

ISBN: (纸本)9783030004101;9783030004095

The tag collision problem is an important issue that affects the efficiency of RFID system. A method of frame length adjustment based on dynamic detection points is proposed in this paper. The method calculates the size of the detection slot area in the frame according to the calculation of the sample size. And then it determines the location of the detection point in the frame. So, the detection point is dynamically adjusted with the length of the frame. Compared with the fixed detection point method, simulation results showed that the dynamic detection point method can adjust the frame length more accurately and improve the system throughput and speed the tag identification.

关键词： RFID anti-collision algorithm Frame length adjustment Detection point

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Study on RFID Technology and anti-collision of Personnel Orientation in Coal Mine

Study on RFID Technology and Anti-collision of Personnel Ori...

引用

International Conference on Electrical Information and Mechatronics (ICEIM)

作者： Pang, Xiaopeng Zhang, Changsen Henan Polytech Univ Comp Sci & Technol Coll Kaifeng Henan Peoples R China

ISBN: (纸本)9783037853115

The RFID technology of personnel orientation in coal mine is introduced in this article. Combined with special circumstances and special coal mine safety regulations, the unavoidable collision problem in RFID is also analyzed detailedly. It points out the deficiencies of the general anti-collision algorithm. Then it brings forward an improved anti-collision algorithm, which is significative for enhancing performance of personnel orientation system in coal mine.

关键词： personnel orientation in coal mine RFID anti-collision algorithm

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A Comparative Performance Evaluation Study of The Basic Binary Tree and Aloha Based anti-collision Protocols For Passive RFID System

A Comparative Performance Evaluation Study of The Basic Bina...

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24th International Conference on Microelectronics (ICM)

作者： Rennane, Ahmed Saadi, Hadjer Touhami, Rachida Yagoub, Mustapha C. E. USTHB Fac Elect & Informat LINS Bab Ezzouar Algeria Univ Ottawa ERML Dept Elect & Informat Ottawa ON Canada

ISBN: (纸本)9781467352895;9781467352918

RFID (Radio Frequency Identification) technology is one of the most important branches of the automatic identification technology which achieves the identification of targets by contactless communications. One of the major challenges for RFID systems is to avoid or solve collisions due to interference that might occur between tags which decrease the efficiency of RFID system. This paper focused on a detailed comparative performance evaluation study and an adoption of certain algorithms of anti-collision for passive RFID system, for the two families of solving collision: deterministic (according to the: QTA, CTTA, BS-QTA, BS-CTTA) and stochastic (ALOHA, SLOTTED ALOHA, np-CSMA). The simulation results for the two families that we get with protocols evaluation are based on their own proper evaluation parameters. Thus, for evaluating the simulation of the stochastic family, we have proposed a new performance metric which judges and correctly evaluates this anti-collision protocol;which is: the number of identified tags versus to the time. This metric provides a direct measure of the time taken to read a group of tags.

关键词： RFID anti-collision algorithm Protocols Binary Tree ALOHA Probabilistic methods deterministic methods

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