GB/T 29768-2013 PDF English
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Information technology - Radio frequency identification - Air interface protocol at 800/900 MHz
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GB/T 29768-2013: Information technology - Radio frequency identification - Air interface protocol at 800/900 MHz
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT29768-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 35.220.01
L 64
Information technology - Radio frequency
identification - Air interface protocol at 800/900 MHz
Issued on. SEPTEMBER 18, 2013
Implemented on. MAY 01, 2014
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword... 5
Introduction... 6
1 Scope... 11
2 Normative references... 11
3 Terms and definitions... 11
4 Symbols and abbreviations... 11
5 Physical layer and media access control layer... 14
6 Working method of protocol... 27
7 Summary of air interface parameters... 81
Appendix A (Informative) Checking end conditions... 84
Appendix B (Normative) Tables of tag state transitions... 85
Appendix C (Normative) Tables of command responses of tag... 95
Appendix D (Normative) CRC calculation... 106
Appendix E (Normative) Operation state returned by the tag... 107
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by and shall be under the jurisdiction of the
National Information Technology Standardization Technical Committee
(SAC/TC 28).
Drafting organizations of this standard. Chinese People's Liberation Army
National University of Defense Technology, Ministry of Industry and Information
Technology Electronics Industry Standardization Research Institute, Beijing
Zhongdian Huada Design Co., Ltd., Tianjin Zhongxing Zhilian Technology Co.,
Ltd., Ruixin Lianke (Beijing) Electronic Technology Co., Ltd., Xi'an Xidian
Jietong Wireless Network Communication Co., Ltd., Shenzhen Yuanwanggu
Information Technology Co., Ltd., National Radio Monitoring Center, Beijing
University of Aeronautics and Astronautics, Shanghai Juxing Instrument Co.,
Ltd., Beijing Tongfang Microelectronics Co., Ltd., Xidian University, China
Article Coding Center, Shanghai Kunrui Electronic Technology Co., Ltd.
The main drafters of this standard. Li Jiancheng, Geng Li, Gao Lin, Wang
Hongyi, Feng Jing, Yang Qing, Gu Xiaochen, Shen Hongwei, Wang Li, Guan
Chao, Cao Jun, Wang Zheng, Du Zhiqiang, Lan Tian, Song Jiwei, Jin Qian,
Wang Wenfeng, Xia Dina, Liu Wenli, Cao Guoshun, Zheng Liming, Wu Jianfei,
Li Cong, Zhang Bingbing, Feng Hanjiong, Song Qizhu, Zhang Youguang, Chen
Ke, Wu Xingjun, Liu Weifeng, Wang Yi, Li Zhuofan, Qiao Shenjie, Zhu Zheng.
1 Scope
This standard specifies the physical layer and media access control layer
parameters and protocol working methods of the air interface in 840 MHz ~ 845
MHz and 920 MHz ~ 925 MHz radio frequency identification system.
This standard applies to the design, production, testing, use of tags and readers
for radio frequency identification systems in the frequency bands of 840 MHz ~
845 MHz and 920 MHz ~ 925 MHz.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 29261.3-2012 Information technology - Automatic identification and
data capture (AIDC) techniques - Vocabulary - Part 3.Radio-frequency
identification
3 Terms and definitions
The terms and definitions as defined in GB/T 29261.3-2012 as well as the
following terms and definitions apply to this document.
4 Symbols and abbreviations
The following symbols and abbreviations apply to this document.
4.1 Symbols
fc - Channel center frequency;
4.2 Abbreviations
AK - Authentication key;
5 Physical layer and media access control layer
5.1 Communication interaction model
The reader uses TPP to encode baseband data, uses DSB-ASK or SSB-ASK
to modulate the radio frequency carrier, to send commands to one or more tags.
After the command is sent, the reader continues to send the unmodulated radio
frequency carrier and listens to the response data pack from the tag.
5.2 The physical layer and media access control layer from the
reader to the tag
5.2.1 General requirements
The reader uses TPP to encode baseband data. The reader shall support the
DSB-ASK or SSB-ASK modulation method. The tag shall be able to demodulate
the DSB-ASK and SSB-ASK modulation method.
5.2.7 Data encoding
The reader uses the TPP as shown in Figure 4 to encode the baseband data.
5.2.8 Preamble
The forward-link shall use the preamble communication as shown in Figure 5.
The preamble consists of a separator, a calibration symbol, a calibration symbol.
The length tolerance of the separator is ±5%; the length tolerance of the
calibration symbol 1 and the calibration symbol 2 are both ±1%.
6 Working method of protocol
6.1 Anti-collision mechanism
Multi-tag anti-collision uses the DDS-BT mechanism, as shown in Figure 15.In
this mechanism, the initial value of the tag time slot counter is set to 0.The time
slot counter is gradually adjusted according to subsequent commands. When
the time slot counter is 0, the tag jumps from the Arbitrate state to the reply state
and starts to respond to the reader.
6.2 Tag storage area structure
6.2.1 Overview
The storage of tags is divided into four logical storage areas. tag information
area, coding area, security area, user area. Among them, the user area is an
optional area. Each logical storage area contains one or more words, as shown
in Figure 16.
6.2.2 Tag information area
00h ~ 07h in the tag information area store the assigned identifier in the tag TID.
The location above 08h in the tag information area stores other data except the
assigned identifier.
6.2.5 User area
The user area stores user-defined information. The tag may have no user area,
or the user area can be divided into several subareas according to actual needs,
up to 16 subareas. The structure of the multi-user area division is as shown in
Figure 20.Each user subarea can have a different access password.
6.4 Tag state
6.4.1 General requirements
Tags that support security authentication shall include 8 states. ready, arbitrate,
reply, acknowledged, authentication, open, secured, killed; tags that do not
support security authentication shall include 7 states. ready, arbitrate, reply,
acknowledged, open, secured, killed.
6.5 Reader command set
6.5.1 General requirements
The command set of the reader is divided into two groups, namely the checking
group command and the access group command. The command code is as
shown in Table 8.The necessary commands are those commands that the
reader and the tag shall support; optional commands are those that the reader
and tag may support.
6.5.9 Reply error command
The tag shall execute the reply error command as shown in Table 18.Tags in
the reply state and acknowledged state, after receiving the reply error command,
jump to the arbitrate state without changing their checking flag. Tags in the
authentication state, open state, security state, after receiving the reply error
command, jump to ready state and do not change its checking flag. Tags in
arbitrate state, after receiving the reply error command, keep the current state
without changing their checking flag. Tags in the ready state and killed state do
not respond to the error command.
6.7 Secure communication protocol
Tags that require secure communication can use the following secure
communication protocols.
7 Summary of air interface parameters
7.1 Summary of physical layer and media access control layer parameters
The physical layer and media access control layer parameters from the reader
to the tag are as shown in Table 56.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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