CN119402842B - A method for predicting RFID system performance under linear tag distribution - Google Patents
A method for predicting RFID system performance under linear tag distributionInfo
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- CN119402842B CN119402842B CN202411468091.1A CN202411468091A CN119402842B CN 119402842 B CN119402842 B CN 119402842B CN 202411468091 A CN202411468091 A CN 202411468091A CN 119402842 B CN119402842 B CN 119402842B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Environmental & Geological Engineering (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
本发明公开了一种标签线性分布情形下的RFID系统性能预测方法，方法步骤如下：S1：将RFID标签线性阵列分布，并记录标签的数量n和间距；S2：记录标签工作波长λ，并计算标签间距的波长数d λ ；S3：依据标签的数量n和波长数d λ 对标签线性阵列分布RFID系统性能的数学模型求解，获取系统性能衰减最明显位置的性能衰减量；S4：通过性能衰减量确定激活所有标签所需要的发射功率提升倍率。本发明的性能预测方法具有计算量小、计算速度快和适应性普遍等优点。
The present invention discloses a method for predicting RFID system performance under a linear tag distribution scenario. The method comprises the following steps: S1: Arrange RFID tags in a linear array and record the number n and spacing between tags; S2: Record the tag operating wavelength λ and calculate the number of wavelengths dλ between tags; S3: Solve a mathematical model of the RFID system performance based on the number n and the number dλ of tags, and obtain the performance degradation at the location where the system performance degradation is most significant; S4: Determine the transmission power increase factor required to activate all tags based on the performance degradation. The performance prediction method of the present invention has the advantages of low computational complexity, high computational speed, and universal adaptability.
Description
Technical Field
The invention relates to the technical field of radio frequency identification electronic tags, in particular to a method for predicting the performance of an RFID system under the condition of linear tag distribution.
Background
The Radio Frequency Identification (RFID) technology can realize contactless communication between a reader and a tag, and is widely applied to various fields in social and economic development, such as logistics, traffic, collection of library, production and the like due to the advantages of long reading distance, high reading speed, long service life and the like. However, in these practical application scenarios, the tags are often in a dense distribution state and in a dense deployment state with a distance of several wavelengths from each other, each tag is susceptible to interference of backward link scattering signals of other tags, and the impedance matching relationship between the chip and the tag antenna is destroyed, so that the performance of the tag and the RFID system is significantly reduced. Therefore, it is necessary to examine the influence through a corresponding model, so as to provide a theoretical basis for application of small, passive and densely distributed RFID tags in the future.
In the prior art, electromagnetic simulation software is often adopted to simulate the working condition of a target tag under an interference tag, so that the influence of the mutual coupling effect on an RFID system link is analyzed. The following problems still remain:
(1) There is no study of the impact relationship between the overall distribution state of the RFID system and the system performance.
(2) The simulation calculation amount is large and the time is long. When the analysis tag type needs to be replaced, the modeling requires a large amount of work.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides the RFID system performance prediction method under the condition of linear label distribution, and the method has the advantages of small calculated amount, high calculation speed, universal adaptability and the like.
The invention provides a method for predicting the performance of an RFID system under the condition of linear distribution of labels, which comprises the following steps:
s1, distributing RFID labels in a linear array, and recording the number n and the spacing d of the labels;
s2, recording the working wavelength lambda of the label, and calculating the wavelength number d λ of the label spacing;
S3, solving a mathematical model of the performance of the RFID system distributed by the tag linear array according to the number n of the tags and the wavelength d λ, and obtaining the performance attenuation quantity of the most obvious position of the system performance attenuation;
And S4, determining the transmission power lifting multiplying power required by activating all the tags according to the performance attenuation quantity.
Preferably, the calculation method of the wavelength number d λ in S2 is as follows:
wherein d λ >0.16.
Preferably, the mathematical model of the performance of the tag linear array distributed RFID system in S3 is as follows:
A2＝1.45-25.98e-1.56n
Where τ minn,dλ represents the power transfer coefficient where the performance degradation of the tag population system is most pronounced.
Preferably, the method for calculating the performance attenuation amount delta eta of the most obvious position of the system performance attenuation is as follows:
Δη(%)=1-τminn,dλ。
preferably, the calculation method of the transmit power boost multiplying power Δp in S4 is as follows:
the beneficial technical effects of the invention are as follows:
The RFID system performance prediction method under the linear tag distribution condition provided by the invention takes the power transmission coefficient as an index of RFID system performance prediction, builds a transmission model related to the power transmission coefficient, and can determine the most obvious position of the tag group system performance attenuation and the attenuation amount of the position through the model, thereby determining the transmission power lifting multiplying power required by a reader for activating all tags under the influence of the performance attenuation caused by the mutual coupling effect.
Drawings
Fig. 1 is a schematic flow chart of a method for predicting performance of an RFID system under a linear tag distribution condition according to the present invention.
Fig. 2 is a schematic diagram of an adaptive scenario of an RFID system performance prediction method under a linear tag distribution condition according to the present invention.
Detailed Description
The invention is further illustrated below in connection with specific embodiments.
Referring to fig. 1 and 2, the performance prediction method of the signature linear array distributed RFID system provided by the present invention includes the following steps:
S1, 6 cargoes attached with ALN-9662RFID labels are distributed on a plane in a linear array mode, and the distance between the labels is 10cm.
S2, calculating the wavelength number of the label spacing through the working wavelength of the reader-writer working state recording system being 32.8 cm.
The calculation method of the wavelength number d λ comprises the following steps:
the number of wavelengths of the label spacing of this embodiment is calculated to be 0.305.
S3, substituting the number of the labels obtained in the S1 and the wavelength number obtained in the S2 into a mathematical model of the linear array distributed RFID system performance to solve, and obtaining the performance attenuation quantity of the most obvious position of the system performance attenuation.
The mathematical model of the performance of the linear array distributed RFID system is as follows:
A2＝1.45-25.98e-1.56n
Where τ minn,dλ represents the power transfer coefficient where the performance degradation of the tag population system is most pronounced, and is calculated to be τ min 6,0.305 ≡ 0.6638.
The amount of performance decay at which the system performance decay is most pronounced can be expressed as:
Δη(%)=1min-τminn,dλ。
Substituting τ min 6,0.305 to obtain Δη (%) =1- τ min 6,0.305 +.33.62%, i.e. the tag performance decay at the most significant location of the system performance decay is 33.62%.
And S4, determining the transmission power lifting multiplying power delta P required by the reader to activate all the tags under the influence of the performance attenuation caused by the mutual coupling effect by the performance attenuation in S3.
Substituting τ min 6,0.305 to obtain
The RFID system performance prediction method under the linear tag distribution condition provided by the invention takes the power transmission coefficient as an index of RFID system performance prediction, builds a transmission model related to the power transmission coefficient, and can determine the most obvious position of the tag group system performance attenuation and the attenuation amount of the position through the model, thereby determining the transmission power lifting multiplying power required by a reader for activating all tags under the influence of the performance attenuation caused by the mutual coupling effect.
Claims (2)
1. The RFID system performance prediction method under the condition of linear label distribution is characterized by comprising the following steps:
s1, distributing RFID labels in a linear array, and recording the number n and the spacing d of the labels;
s2, recording the working wavelength lambda of the label, and calculating the wavelength number d λ of the label spacing;
S3, solving a mathematical model of the performance of the RFID system distributed by the tag linear array according to the number n of the tags and the wavelength d λ, and obtaining the performance attenuation quantity of the most obvious position of the system performance attenuation;
the mathematical model of the performance of the label linear array distributed RFID system in S3 is as follows:
;
;
;
Wherein, the A power transfer coefficient representing a most significant location of the tag population system performance decay;
Performance decay amount at most obvious position of system performance decay The calculation method of (1) is as follows:
;
S4, determining the transmission power lifting multiplying power required by activating all the tags through the performance attenuation quantity;
s4, increasing multiplying power of transmitting power The calculation method of (1) is as follows:
。
2. the method for predicting the performance of an RFID system in a linear tag distribution according to claim 1, wherein the method for calculating the number of wavelengths d λ in S2 is as follows:
;
wherein d λ >0.16.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104361244B (en) * | 2014-11-21 | 2017-08-25 | 合肥河野电子科技有限公司 | A kind of passive ultrahigh frequency radio frequency identification Reliability Modeling |
| CN105426921B (en) * | 2015-12-02 | 2019-08-13 | 青岛科技大学 | A kind of RFID label antenna optimization method |
| US10832024B2 (en) * | 2019-11-26 | 2020-11-10 | Intel Corporation | Behavior detection using RFID in environments with high RFID tag density |
| CN110991204B (en) * | 2019-12-12 | 2023-07-07 | 内蒙古农业大学 | A Prediction Method of Tag Arrival Rate in Mobile RFID System |
| CN114580588B (en) * | 2022-05-06 | 2022-08-12 | 江苏省质量和标准化研究院 | Method of UHF RFID Group Tag Selection Based on Probability Matrix Model |
| CN118464156A (en) * | 2024-05-13 | 2024-08-09 | 合肥工业大学 | Container liquid level monitoring method based on passive UHF RFID system |
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Non-Patent Citations (1)
| Title |
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| 线性阵列分布RFID系统性能建模方法研究;佐磊，等;《电子测量与仪器学报》;20241129;第39卷(第1期);全文 * |
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