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检索条件"主题词=Anti-collision algorithm"

共 99 条记录，以下是81-90 订阅

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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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Research on anti-collision Technology with Multiple Tags for RFID System

Research on Anti-collision Technology with Multiple Tags for...

引用

3rd International Conference on Mechanical and Electronics Engineering (ICMEE 2011)

作者： Hong, Zhang Zhang, Xinghui Guo, Jianli Weifang Univ Weifang 261061 Peoples R China Shandong Transport Vocat Coll Weifang 261061 Peoples R China Weifang Univ Sci & Technol Weifang 261011 Peoples R China

ISBN: (纸本)9783037852866

ALOHA algorithm can't prevent collision much effectively, the process of anti-collision is longer while the amount of tags plunged collision is numerous, and sometimes the problem about estimating mistakenly arises. Binary search algorithm, which identification efficiency is higher, the problem about estimating mistakenly can't arise, but its delay tima is more longer, security is short. The amelioration algorithm, return binary search algorithm can identify tag more effectively and rapidly, identifying time and the amount of tags is the relation of line form. The significance is very momentous that vast goods are identified, traced and managed by this amelioration algorithm.

关键词： Radio Frequency Identification Reader Tag 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...

引用

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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Study on the Improved Framed Slotted ALOHA anti-collision algorithm

Study on the Improved Framed Slotted ALOHA Anti-collision Al...

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The 4th International Conference on Wireless Communications, Networking and Mobile Computing(第四届IEEE无线通信、网络技术及移动计算国际会议)

作者： Zu-jue Chen Dong Qin Hong-jin Wang Department of Computer Science and Telecommunication Engineering Jiangsu University Zhenjiang 212013 CHINA

In order to improve the identification efficiency of tag anti-collision algorithm in RFID system further, the improved framed slotted ALOHA algorithm is proposed with accurate tag estimation and quick identification. the whole process is divided into two phases including tag estimation and tag identification, in tag estimation algorithm, the collision probability threshold parameter is used to estimate the number of tags accurately for the optimization of the number of time slots in the initial frame;in tag identification phase, the binary search algorithm is used to identify the tags fleetly that collide with other tags in time slots. Simulation result shows that the improved FSA consumes less time slots than dynamic framed slotted ALOHA (DFSA), the binary tree protocol and FSA. The proposed algorithm can improve the tag identification efficiency in RFID system further.

关键词： RFID framed slotted ALOHA anti-collision algorithm tag estimation

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Survey of the Advances in Reader anti-collision algorithms for RFID Systems

Survey of the Advances in Reader Anti-collision Algorithms f...

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23rd Chinese Control and Decision Conference

作者： Li, Zhonghua He, Chunhui Tan, Hong-Zhou Sun Yat Sen Univ Sch Informat Sci & Technol Guangzhou 510006 Guangdong Peoples R China

ISBN: (纸本)9781424487363

In RFID systems, applying multiple readers will cause communication conflict or data interference (i.e. reader collision) when the readers within the interference region of each other attempt to access a tag by using the same frequency channel and at the same time. In order to solve this reader collision problem, many reader anti-collision algorithms have been proposed. This paper attempts to globally review of the main reader anti-collision algorithms and to further compare among these algorithms, and discusses the prospect of research and development in reader aiiti-collision field.

关键词： RFID system reader anti-collision algorithm

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A New Kind of RFID Reader anti-collision algorithm

A New Kind of RFID Reader Anti-collision Algorithm

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4th International Conference on Circuits and Systems for Communications (ICCSC 2008), vol.2

作者： Leian Liu Dashun Yan Xiaozheng Lai Shengli Lai College of Computer Science & Engineering Zhongkai University of Agriculture and Technology Guangzhou China School of Electronic and Information Engineering South China University of Technology Guangzhou China

Reader collision problem is the most important problem in RFID reader network and which must be solved in order to make sure that RFID reader network works normally. Methods which are used to solve the reader collision problem are called as reader anti-collision algorithms. The goods and bads of the reader anti-collision algorithms play a vital role to the efficiency of the whole network system. In this paper, the reader collision problem is researched in detail and its different styles are summarized. On the basis of researching the existing algorithms, a new kind of reader anti-collision algorithm is proposed. By the simulation analysis, we can get the result that the proposed algorithm has better performance compared with others.

关键词： Radio Frequency Identification Reader collision problem anti-collision algorithm

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An Improved anti-collision algorithm for RFID System

An Improved Anti-collision Algorithm for RFID System

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The 4th International Conference on Wireless Communications, Networking and Mobile Computing(第四届IEEE无线通信、网络技术及移动计算国际会议)

作者： Yue Guo Ligang Hou Shuqin Geng Wuchen Wu VLSI & System Lab Beijing University of Technology Beijing 100022 P.R.China

RFID system is widely used in wireless communication systems. Tag collision, causing the RFID reader cannot identify the tag data, is a serious problem when several tags use the same communication channel simultaneously. Framed slotted ALOHA algorithm is normally used to solve the RFID collision problem. However, it requires an exponentially increasing number of slots with the tags number increasing. An improved anti-collision algorithm is presented in this paper, which has a lower collision probability and needs fewer slots. The proposed algorithm has been used in a 433MHz RFID system and reduces the tag collision probability successfully.

关键词： RFID anti-collision algorithm frequency channel

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Performance Analysis of Basic Tree Protocols and ALOHA-Based anti-collision algorithms Used in RFID Systems

Performance Analysis of Basic Tree Protocols and ALOHA-Based...

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IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)

作者： Saadi, Hadjer Touhami, Rachida Yagoub, Mustapha C. E. USTHB Univ Elect & Informat Fac Algiers Algeria

ISBN: (纸本)9781467307536

Radio Frequency Identification (RFID) is a popular automatic identification and an emerging wireless technology with highly promising applications. In an RFID system, the anti-collision algorithm is one of the primary mechanisms to address the issue of multi-object identification. This paper focused on a detailed study of the ALOHA anti-collision problem and a comparative study with the basic binary tree protocols. Two tag estimation methods were investigated and a performance analysis was successfully achieved based on various key design parameters such as the probability of a successful transmission, the collision ratio, the offered load, the system efficiency, the system throughput and the estimation accuracy of successful transmission.

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

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RESEARCH ON WIRELESS SENSOR NETWORK IN AUTOMOBILE COMPREHENSIVE PERFORMANCE TESTING SYSTEM

RESEARCH ON WIRELESS SENSOR NETWORK IN AUTOMOBILE COMPREHENS...

引用

IET International Conference on Information Science and Control Engineering

作者： Shushang Zhao Yahui Zhang Lixia Yin Henan University of Science and Technology Luoyang China|c|

ISBN: (纸本)9781629939254

A kind of automobile comprehensive performance testing system based on wireless sensor networks is introduced by this paper. The system consists of a portable computer, the USB-Wireless protocol conversion module and wireless data acquisition module, which can be suitable for various types of vehicle performance testing. Portable computer communication with data acquisition module through USB-Wireless protocol conversion module. Optimum anti-collision algorithm is adopted in wireless transmission part, and the system synchronous data acquisition between different modules can be realized by time compensation. Test results show that, the data transmission is stable and reliable, high precision, high modularization, strong real-time performance and excellent portability.

关键词： Wireless communication Data acquisition anti-collision algorithm Vehicle performance USB communication

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Simulation of the anti-collision Process of RFID Systems Based on Multiple Access Protocol Modeling

Simulation of the Anti-Collision Process of RFID Systems Bas...

引用

IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)

作者： Saadii, Hadjer Touhami, Rachida Yagoub, Mustapha C. E. USTHB Univ Elect & Informat Fac BP 32 Algiers Algeria Univ Ottawa Sch Elect Engn & Comp Sci Ottawa ON Canada

ISBN: (纸本)9781467307536

In this paper, the authors targeted multiple access protocols to analyze the problem of collision and collision avoidance in RFID systems. By considering user terminals as tags and access point as reader, the authors efficiently modelled the wireless communication channel by considering the capture effect. Otherwise, if the capture effect is not considered, the system is modelled under wired communication.

关键词： Multiple Access Protocols RFID anti-collision algorithm Aloha Slotted Aloha CSMA ISMA capture effect

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