Post on 12-Jan-2016
transcript
EPC Standards
EPC System elements : EPC Coding structure The reader/ tag Protocols Savant platform The Object Numbering Service (ONS) PML server
EPC Standards (cont.)
UPC = Universal Product Code
a unique code for every group of objects
enables user such as supermarkets to identify every product
two cans of Nestlé coffees have the same UPC
EPC Standards (cont.)
EPC = Electronic Product Code
next generation barcode
coding scheme to electronically identify consumer goods
vision: enable the automated, unique identification of tagged objects
developed by EPCglobal (EAN, UCC)
EPC consists of :UPC + serial number = 96 bits
EPC Infrastructure
EPC Infrastructure (cont.)
EPC Tag - 5 classes
CLASS Characteristics Note
CLASS 0,
CLASS 0+
passive, read only ,ID pre-assigned by tag vendors
Class 0+ is writable
Matrics provides Class 0 tags since 2003;
CLASS 1
(Gen1, Gen2)
passive, WORM, 96-128 bits user memory
Alien Technology provides Class 1 tags since 2003
CLASS 2 Passive, Read/Write capable tag working samples on market
CLASS 3 Semi-passive( with battery), R/W capable and longer read range,30m
Auto ID Center has not completed the IC design
CLASS 4 Semi-passive( with battery),
Long range,100m+
several year to complete
ISO 18000 vs EPC
ISO 18000-6 and EPC, both specify UHF frequencies
ISO 18000-6 specifies Air Interface protocol without considering basic structures such as network technology and IT platforms etc.
ISO 18000-6 and EPC Tags will be compatible in the long run.
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Tags available
UHF Tags – 860 to 960 MHzHF Tags – 13.56 MHz
EPC Class 0/0+EPC Class 1EPC Class 1 Gen 2ISO 18000-6U-Code 1.19
ISO 15693ISO 14443 AISO 14443 BISO 18000 P3EPC HF
Typical UHF tags
EPC Class 1 IC Properties
- 96 bit EPC R/W - UHF frequencies from 860MHz to 960MHz - Data transfer rate - To the tag 15 to 70 kbits/s - From the tag 30 to 140kbit/s - More than 10 000 write/erase cycles - 40 year data retention - Kill command
Typical UHF tags (cont.)
Philips U-Code EPC 1.19 IC Properties
- Memory - Supports 64 bit and 96 bit EPC - 256 bit user memory - persistent ID flag - UHF frequencies from 860MHz to 960MHz - Data transfer rate - Reader to tag 40kbits/s - Tag to reader 40kbits/s to 160kbits/s - depending on the regulatory area
and amount of tags in reader field
Class 1 Gen 2 vs Class 1 Gen 1
Feature Class 1 Gen 2 (CIG2) Class 1 Gen 1
Read speed Up to 880/sec US
Up to 450 sec EU
Up to 230 US
UP to 115 EU
Write speed ( 96 bit) Min 5 tags/sec;
Re-WRITE many times
3 tags/sec
Re-writable many times
Tag sorting Protocol Q protocol Binary tree
Tag data verification 16 bit CRC read & write 16 bit CRC reads
Multiple reader operation Frequency hopping
Listen-before –talk with dense
reader modes
Four reader sessions for parallel
communication with one tag
Frequency hopping
Listen-before –talk
Security 32 bit lock & kill password
Options for “handle” –based
communication
8 bit kill password with
lockout
Extensibility Up to 512 bit item ID
Unlimited user memory
Anticipates Class 2&3 systems
Up to 96 bit item ID