Simulation of the anti-collision process of RFID systems based on multiple access protocol modeling

2014 International Conference on Multimedia Computing and Systems (ICMCS)

Yagoub

2014

Self Cite

This paper discusses the implementation of an efficient anti-collision algorithm for RFID systems. Conventional TDMA methods do not show a high efficiency and speediness in collision detection and do not take into account the spatial characteristics of tags distribution. By combining the TDMA (Time Division Multiple Access) and SDMA (Space Division Multiple Access) algorithms, the proposed approach takes into account the characteristics of the tag position in the reading area of the reader. Knowing that the SDMA method is based on the principle of Digital Beam Forming (DB F), we used the FFT and IFFT blocks to form the different beams and the OFDM technique to meet the orthogonality condition. We then divided the space into two subsets of beams and applied the TDMA method to detect any collision. The developed RFID anti-collision SDMA system has been coded by VHDL and simulated using the ISE software for FPGA implementation.

Section: Introductionmentioning

confidence: 99%

Design and simulation of anti-collision RFID system based on SDMA-OFDM

2014 International Conference on Multimedia Computing and Systems (ICMCS)

Yagoub

2014

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“…If two or more tags transmit, a complete or partial collision occurs, each tag then resolve by backing off randomly before retransmitting their ID. So the first disadvantage of this algorithm is the high probability of collision [1], [4][5][6][7][8].…”

Section: Aloha-based Anti-collision Algorithmsmentioning

confidence: 99%

“…Thus, compared to pure ALOHA, this method will decrease the probability of collision. Therefore, the throughput S of slotted ALOHA for the offered traffic G is given as [1], [4][5][6][7][8]:…”

Section: B Slotted Alohamentioning

confidence: 99%

“…So DFSA algorithm can solve partially the problem of FSA. DFSA algorithm has several versions depending on the methods changing the frame size [1]- [4][5][6][7][8].…”

Section: Dynamic Framed Slotted Aloha (Dfsa)mentioning

confidence: 99%

“…As a result, the reader identifies the tag even if collision has occurred. The value of T which is called capture ratio indicates the amount by which a data packet must be stronger than others to be detected by the receiver without error [1], [5][6]. For example, the throughput S in the Slotted Aloha algorithm with the capture effect is given by:…”

Section: Increasing Efficiency With Capture Effectmentioning

confidence: 99%

See 2 more Smart Citations

A comparative performance evaluation study of the basic binary tree and aloha based anti-collision protocols for passive RFID system

Rennane

2012 24th International Conference on Microelectronics (ICM)

et al. 2012

Self Cite

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.

TDMA‐SDMA‐based RFID algorithm for fast detection and efficient collision avoidance

Yagoub

2017

Int J Communication

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SummaryIn radio frequency identification, collisions between tags and readers are among key weaknesses to address for reliable operation. To efficiently tackle the above issues and shorter the identification time, different algorithms have been adopted. However, they are still perfectible. For this aim, an efficient fast detection and collision avoidance (FD-CA) algorithm is proposed to solve tag to tag collision drawbacks.Design and Methods: Based on an innovative combination of TDMA and SDMA algorithms, it takes into account spatial distribution of tags to significantly reduce their identification time.Results and Discussion: Besides, to further highlight its efficiency, the proposed algorithm was successfully applied to reader-to-reader collision with an increasing throughput and a decreasing average waiting time and average rate collision while compared to existing algorithms.Conclusion: Finally, the proposed FD-CA was demonstrated through practical examples, comparison with existing works, and successful FPGA implementation.