EPCGlobalC1G2Protocol_epc+global+c1+gen2

RFID

需积分: 35 164 浏览量更新于2023-03-16 评论收藏 3.92MB PDF 举报

身份认证购VIP最低享 7 折!

领优惠券(最高得80元）

资源详情

资源评论

资源推荐

Specification for RFID Air Interface

EPC™ Radio-Frequency Identity Protocols

Class-1 Generation-2 UHF RFID

Protocol for Communications at 860 MHz – 960 MHz

Version 1.0.9

Unauthorized reproduction, modification and/or use of this Specification is prohibited. Any reproduction, modifi-

cation and/or use of this Specification is subject to the licensing obligations of the EPCglobal Intellectual Prop-

erty Policy and enforcement of the terms thereof.

Requests for permission to reproduce should be addressed to epcglobal@epcglobalinc.org.

Violators may be prosecuted.

Contents

INDEX OF FIGURES .................................................................................................................................................5

INDEX OF TABLES ...................................................................................................................................................6

FOREWORD ..............................................................................................................................................................8

INTRODUCTION........................................................................................................................................................9

1. SCOPE..............................................................................................................................................................10

2. CONFORMANCE .............................................................................................................................................10

2.1 CLAIMING CONFORMANCE .............................................................................................................................10

2.2 GENERAL CONFORMANCE REQUIREMENTS.....................................................................................................10

2.2.1 Interrogators .......................................................................................................................................10

2.2.2 Tags....................................................................................................................................................10

2.3 COMMAND STRUCTURE AND EXTENSIBILITY....................................................................................................11

2.3.1 Mandatory commands ........................................................................................................................11

2.3.2 Optional commands............................................................................................................................11

2.3.3 Proprietary commands .......................................................................................................................11

2.3.4 Custom commands.............................................................................................................................11

3. NORMATIVE REFERENCES...........................................................................................................................11

4. TERMS AND DEFINITIONS.............................................................................................................................13

4.1 ADDITIONAL TERMS AND DEFINITIONS ............................................................................................................13

5. SYMBOLS, ABBREVIATED TERMS, AND NOTATION.................................................................................15

5.1 SYMBOLS.....................................................................................................................................................15

5.2 ABBREVIATED TERMS ...................................................................................................................................15

5.3 NOTATION....................................................................................................................................................16

6. PROTOCOL REQUIREMENTS........................................................................................................................17

6.1 PROTOCOL OVERVIEW ..................................................................................................................................17

6.1.1 Physical layer......................................................................................................................................17

6.1.2 Tag-identification layer .......................................................................................................................17

6.2 PROTOCOL PARAMETERS..............................................................................................................................17

6.2.1 Signaling – Physical and media access control (MAC) parameters...................................................17

6.2.2 Logical – Operating procedure parameters........................................................................................21

6.3 DESCRIPTION OF OPERATING PROCEDURE.....................................................................................................22

6.3.1 Signaling .............................................................................................................................................22

6.3.1.1 Operational frequencies ..............................................................................................................22

6.3.1.2 Interrogator-to-Tag (R=>T) communications...............................................................................22

6.3.1.2.1 Interrogator frequency accuracy...............................................................................................22

6.3.1.2.2 Modulation ................................................................................................................................22

6.3.1.2.3 Data encoding...........................................................................................................................22

6.3.1.2.4 Data rates .................................................................................................................................23

6.3.1.2.5 R=>T RF envelope....................................................................................................................23

6.3.1.2.6 Interrogator power-up waveform...............................................................................................24

6.3.1.2.7 Interrogator power-down waveform..........................................................................................24

6.3.1.2.8 R=>T preamble and frame-sync ...............................................................................................24

6.3.1.2.9 Frequency-hopping spread-spectrum waveform......................................................................25

6.3.1.2.10 Frequency-hopping spread-spectrum channelization...............................................................25

6.3.1.2.11 Transmit mask ..........................................................................................................................26

6.3.1.3 Tag-to-Interrogator (T=>R) communications...............................................................................28

6.3.1.3.1 Modulation ................................................................................................................................28

6.3.1.3.2 Data encoding...........................................................................................................................28

6.3.1.3.2.1 FM0 baseband....................................................................................................................28

6.3.1.3.2.2 FM0 preamble ....................................................................................................................29

6.3.1.3.2.3 Miller-modulated subcarrier................................................................................................29

6.3.1.3.2.4 Miller subcarrier preamble..................................................................................................31

6.3.1.3.3 Data rates .................................................................................................................................32

6.3.1.3.4 Tag power-up timing .................................................................................................................33

6.3.1.3.5 Minimum operating field strength and backscatter strength.....................................................33

6.3.1.4 Transmission order......................................................................................................................33

6.3.1.5 Link timing ...................................................................................................................................33

6.3.2 Tag selection, inventory, and access .................................................................................................35

6.3.2.1 Tag memory ................................................................................................................................35

6.3.2.1.1 Kill password.............................................................................................................................36

6.3.2.1.2 Access password......................................................................................................................36

6.3.2.1.3 CRC-16 .....................................................................................................................................36

6.3.2.1.4 Protocol-control (PC) bits..........................................................................................................37

6.3.2.1.5 EPC...........................................................................................................................................37

6.3.2.2 Sessions and inventoried flags....................................................................................................37

6.3.2.3 Selected flag................................................................................................................................38

6.3.2.4 Tag states and slot counter.........................................................................................................39

6.3.2.4.1 Ready state...............................................................................................................................39

6.3.2.4.2 Arbitrate state............................................................................................................................39

6.3.2.4.3 Reply state ................................................................................................................................39

6.3.2.4.4 Acknowledged state..................................................................................................................39

6.3.2.4.5 Open state ................................................................................................................................40

6.3.2.4.6 Secured state............................................................................................................................40

6.3.2.4.7 Killed state ................................................................................................................................40

6.3.2.4.8 Slot counter...............................................................................................................................40

6.3.2.5 Tag random or pseudo-random number generator.....................................................................40

6.3.2.6 Managing Tag populations ..........................................................................................................42

6.3.2.7 Selecting Tag populations...........................................................................................................42

6.3.2.8 Inventorying Tag populations ......................................................................................................42

6.3.2.9 Accessing individual Tags...........................................................................................................44

6.3.2.10 Interrogator commands and Tag replies .....................................................................................45

6.3.2.10.1 Select commands .....................................................................................................................47

6.3.2.10.1.1 Select (mandatory) .............................................................................................................47

6.3.2.10.2 Inventory commands ................................................................................................................49

6.3.2.10.2.1 Query (mandatory) .............................................................................................................49

6.3.2.10.2.2 QueryAdjust (mandatory) ...................................................................................................50

6.3.2.10.2.3 QueryRep (mandatory).......................................................................................................51

6.3.2.10.2.4 ACK (mandatory)................................................................................................................52

6.3.2.10.2.5 NAK (mandatory)................................................................................................................53

6.3.2.10.3 Access commands....................................................................................................................54

6.3.2.10.3.1 Req_RN (mandatory) .........................................................................................................55

6.3.2.10.3.2 Read (mandatory)...............................................................................................................56

6.3.2.10.3.3 Write (mandatory)...............................................................................................................57

6.3.2.10.3.4 Kill (mandatory) ..................................................................................................................58

6.3.2.10.3.5 Lock (mandatory)................................................................................................................61

6.3.2.10.3.6 Access (optional) ................................................................................................................63

6.3.2.10.3.7 BlockWrite (optional) ..........................................................................................................65

6.3.2.10.3.8 BlockErase (optional) .........................................................................................................66

7. INTELLECTUAL PROPERTY RIGHTS INTRINSIC TO THIS SPECIFICATION ............................................67

ANNEX A (NORMATIVE) EXTENSIBLE BIT VECTORS (EBV) ............................................................................68

ANNEX B (NORMATIVE) STATE-TRANSITION TABLES ....................................................................................69

B.1 PRESENT STATE: READY ..............................................................................................................................69

B.2 PRESENT STATE: ARBITRATE ........................................................................................................................70

B.3 PRESENT STATE: REPLY...............................................................................................................................71

B.4 PRESENT STATE: ACKNOWLEDGED ...............................................................................................................72

B.5 PRESENT STATE: OPEN ................................................................................................................................73

B.6 PRESENT STATE: SECURED ..........................................................................................................................74

B.7 PRESENT STATE: KILLED ..............................................................................................................................75

ANNEX C (NORMATIVE) COMMAND-RESPONSE TABLES ...............................................................................76

C.1 COMMAND RESPONSE: POWER-UP................................................................................................................76

C.2 COMMAND RESPONSE: QUERY......................................................................................................................76

C.3 COMMAND RESPONSE: QUERYREP ...............................................................................................................77

C.4 COMMAND RESPONSE: QUERYADJUST ..........................................................................................................77

C.5 COMMAND RESPONSE: ACK .........................................................................................................................77

C.6 COMMAND RESPONSE: NAK .........................................................................................................................78

C.7 COMMAND RESPONSE: REQ_RN ..................................................................................................................78

C.8 COMMAND RESPONSE: SELECT.....................................................................................................................78

C.9 COMMAND RESPONSE: READ ........................................................................................................................79

C.10 COMMAND RESPONSE: WRITE...................................................................................................................79

C.11 COMMAND RESPONSE: KILL ......................................................................................................................80

C.12 COMMAND RESPONSE: LOCK ....................................................................................................................80

C.13 COMMAND RESPONSE: ACCESS ................................................................................................................81

C.14 COMMAND RESPONSE: BLOCKWRITE ........................................................................................................81

C.15 COMMAND RESPONSE: BLOCKERASE ........................................................................................................82

C.16 COMMAND RESPONSE: T

TIMEOUT ...........................................................................................................82

C.17 COMMAND RESPONSE: INVALID COMMAND .................................................................................................83

ANNEX D (INFORMATIVE) EXAMPLE SLOT-COUNT (

) SELECTION ALGORITHM.......................................84

D.1 EXAMPLE ALGORITHM AN INTERROGATOR MIGHT USE TO CHOOSE Q ...............................................................84

ANNEX E (INFORMATIVE) EXAMPLE OF TAG INVENTORY AND ACCESS.....................................................85

E.1 EXAMPLE INVENTORY AND ACCESS OF A SINGLE TAG .....................................................................................85

ANNEX F (INFORMATIVE) CALCULATION OF 5-BIT AND 16-BIT CYCLIC REDUNDANCY CHECKS............86

F.1 EXAMPLE CRC-5 ENCODER/DECODER ..........................................................................................................86

F.2 EXAMPLE CRC-16 ENCODER/DECODER ........................................................................................................86

ANNEX G (NORMATIVE) DENSE-INTERROGATOR CHANNELIZED SIGNALING............................................87

G.1 INTERROGATOR AND TAG SIGNALING IN DENSE-INTERROGATOR ENVIRONMENTS .............................................87

ANNEX H (INFORMATIVE) INTERROGATOR-TO-TAG LINK MODULATION ....................................................89

H.1 BASEBAND WAVEFORMS, MODULATED RF, AND DETECTED WAVEFORMS .........................................................89

ANNEX I (NORMATIVE) ERROR CODES..............................................................................................................90

I.1 TAG ERROR CODES AND THEIR USAGE ...........................................................................................................90

ANNEX J (NORMATIVE) SLOT COUNTER ...........................................................................................................91

J.1 SLOT-COUNTER OPERATION..........................................................................................................................91

ANNEX K (INFORMATIVE) EXAMPLE DATA-FLOW EXCHANGE......................................................................92

K.1 OVERVIEW OF THE DATA-FLOW EXCHANGE ....................................................................................................92

K.2 TAG MEMORY CONTENTS AND LOCK-FIELD VALUES.........................................................................................92

K.3 DATA-FLOW EXCHANGE AND COMMAND SEQUENCE ........................................................................................93

ANNEX L (INFORMATIVE) REVISION HISTORY..................................................................................................94

Index of Figures

FIGURE 6.1 – PIE SYMBOLS........................................................................................................................................22

FIGURE 6.2 – INTERROGATOR-TO-TAG RF ENVELOPE..................................................................................................23

FIGURE 6.3 – INTERROGATOR POWER-UP AND POWER-DOWN RF ENVELOPE ................................................................24

FIGURE 6.4 – R=>T PREAMBLE AND FRAME-SYNC .......................................................................................................25

FIGURE 6.5 – FHSS INTERROGATOR RF ENVELOPE ....................................................................................................26

FIGURE 6.6 – TRANSMIT MASK FOR MULTIPLE-INTERROGATOR ENVIRONMENTS .............................................................27

FIGURE 6.7 – TRANSMIT MASK FOR DENSE-INTERROGATOR ENVIRONMENTS .................................................................27

FIGURE 6.8 – FM0 BASIS FUNCTIONS AND GENERATOR STATE DIAGRAM .......................................................................28

FIGURE 6.9 – FM0 SYMBOLS AND SEQUENCES ............................................................................................................28

FIGURE 6.10 – TERMINATING FM0 TRANSMISSIONS .....................................................................................................29

FIGURE 6.11 – FM0 T=>R PREAMBLE ........................................................................................................................29

FIGURE 6.12 – MILLER BASIS FUNCTIONS AND GENERATOR STATE DIAGRAM..................................................................30

FIGURE 6.13 – SUBCARRIER SEQUENCES ....................................................................................................................30

FIGURE 6.14 – TERMINATING SUBCARRIER TRANSMISSIONS .........................................................................................31

FIGURE 6.15 – SUBCARRIER T=>R PREAMBLE ............................................................................................................31

FIGURE 6.16 – LINK TIMING.........................................................................................................................................34

FIGURE 6.17 – LOGICAL MEMORY MAP ........................................................................................................................35

FIGURE 6.18 – SESSION DIAGRAM...............................................................................................................................38

FIGURE 6.19 – TAG STATE DIAGRAM ...........................................................................................................................41

FIGURE 6.20 – INTERROGATOR/TAG OPERATIONS AND TAG STATE ...............................................................................42

FIGURE 6.21 – ONE TAG REPLY ..................................................................................................................................44

FIGURE 6.22 – SUCCESSFUL WRITE SEQUENCE ..........................................................................................................57

FIGURE 6.23 – KILL PROCEDURE.................................................................................................................................60

FIGURE 6.24 – LOCK PAYLOAD AND USAGE..................................................................................................................62

FIGURE 6.25 – ACCESS PROCEDURE...........................................................................................................................64

FIGURE D.1 – EXAMPLE ALGORITHM FOR CHOOSING THE SLOT-COUNT PARAMETER Q ...................................................84

FIGURE E.1 – EXAMPLE OF TAG INVENTORY AND ACCESS ............................................................................................85

FIGURE F.1 – EXAMPLE CRC-5 CIRCUIT .....................................................................................................................86

FIGURE F.2 – EXAMPLE CRC-16 CIRCUIT ...................................................................................................................86

FIGURE G.1 – MULTI-CHANNEL CEPT ENVIRONMENT ..................................................................................................87

FIGURE G.2 – SUBCARRIER SPECTRAL ALLOCATION FOR CEPT AND FCC ENVIRONMENTS............................................88

FIGURE H.1 – INTERROGATOR-TO-TAG MODULATION ...................................................................................................89

FIGURE J.1 – SLOT-COUNTER STATE DIAGRAM.............................................................................................................91