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EPC/RFID系統架構與案例分析

RFID 課程主題三

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課程內容

• EPC/RFID 系統架構建置• 網路元素的運作原理• 指標性案例分享

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EPC Technologies

• Electronic product code (EPC): an unique code for each object

• RFID Tag• RFID reader• Object Name Service( ONS) : each number corresponds

with an address in database• Product Markup Language(PML): In PML server, PML is used

to describe and store information about the item.• Savant: can work as a router, it get EPC information from

the RFID reader, send the information to ONS Server and combine with application program for management of the item.

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EPC 網路架構 1

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EPC 網路架構 2

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EPC 網路架構 3

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EPC 網路架構 4

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EPC 網路架構 5

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EPC C1G2

• 全名 EPC Class 1 Generation 2

• Four “sessions”, each of which have their own

• Access and Kill passwords

• Four memory “banks”

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Defined Gen 2 Requirements

• Dozens of the world’s leading retail supply chain organizations defined Gen 2 user requirements

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Four sessions

• “Inventoried” flag• “Select” (SL) flag• Only one “inventory” (identify) operation at

a time

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Access and Kill passwords

• Used to restrict reading and writing• EPC code is returned during inventory• Kill operation is permanent

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Four memory banks

• Reserved (Bank 0)• EPC (Bank 1)• TID (Tag ID) (Bank 2)• User (Bank 3)

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Memory Bank 0 (Reserved)

• Reserved memory (bank 0) contains the kill and access passwords

• The kill password occupies bytes 0-1 (MSB first)

• The access password occupies bytes 2-3 (MSB first)

• If a tag does not implement the kill and/or access passwords, it acts as though it had zero-valued passwords that are permanently read/write locked

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Detailed Content of Bank 1 (EPC)

• Contains CRC-16, Protocol Control (PC), and EPC code

• PC bits specify EPC length in 16-bit words• EPC code begins at byte 3 (EPC header)• Caution: EPC C1 G2 uses 16-bit data words

on even boundaries, so you must format and write a proper PC word to write the EPC!

CRC-16 PC EPC less header

64- or 96-bit EPC code

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Detailed Content of Bank 1 (EPC)

• Length is expressed in units of words, so 6 is the length of EPC-96

• RFU is always zero• EPCISO bit is zero for EPC• NSI (Number System ID) is used only if

EPCISO bit is 1• To avoid all this, use “WRITE EPCID=Hxxx…

xxx” with BRI

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Detailed Content of Bank 1 (EPC)

1 byte EPCHeader

CRC-16 Length

RF

U ZeroFill

64- or 96-Bit EPC

PC (Bytes 2-3)CRC (Bytes 0-1)

NSI

1 byte

EPCISO Bit

Bytes 4-n

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Memory Bank 2 (Tag ID)

• Contains an 8-bit ISO/IEC 15963 allocation class identifier (0xE2 for EPCglobal) in byte 0

• The next 12 bits are a mask-designer identifier (manufacturer ID) (obtained from EPCglobal)

• The 12 bits after the manufacturer is a 12-bit tag model.

• The manufacturer ID and tag model must provide sufficient information for a reader to uniquely identify the custom commands and/or optional features that a tag supports

• Bytes 4 and up may contain Tag- and vendor-specific data such as a tag serial number

IEC 15963ID (0xE2)

Manufacturer ID Tag Model Tag Serial Number

8 bits 12 bits 12 bits Vendor-specific

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Memory Bank 3 (User)

• Organization and use is user-defined

• Memory capacity determined by chip manufacturer

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案例分享• Auto Receiving /Shipping• Fork Lift Application• Drug Counterfeit & ePedigree• Wal*Mart • 廢棄物處理 RFID 應用

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Auto Receiving /Shipping

• Wal-Mart Mandate

• Metro Mandate

• Target Mandate

Real Cases Benefits

• 減少清點每箱貨物的時間

• 與 ASN 比較用以減少補貨時間及成本

• 減少尋找貨物時間• 增加客戶滿意度

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Gate reader

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Fork Lift Application

Dock Door 1

Dock Door 20

Cost Savings $

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貨架天線擺設

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Forklift Related Application

• Worley 3PL

Real CasesBenefits

• 減少盤點時間• 減少建置閘門式

Reader 之固定成本• 減少尋找貨物時間• 增加客戶滿意度

C

B

A

1 2 3 4

S1 S2S2 S3S3

PickGo to S3

Return toReceiving

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Drug Counterfeit & ePedigree

100,000 Tags used1st counterfeit Project in Asia

Purdue Pharma & H.D. Smith Pilot

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Wal*Mart

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廢棄物處理 RFID 應用 - 收料

廢棄物With RFIDLabel

廢棄物With RFIDLabel

RFID讀取模組

電子數位輸出磅秤

GPRS(3-5 km)

電腦列印模組

iPAQ PDA

BT(10 m)

BT(10 m)

WLAN(100 m)

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廢棄物處理 RFID 應用 - 焚化爐管理

廢棄物With RFID Label& External Barcode Label

廢棄物With RFID Label& External Barcode Label

電腦控制模組

RFID 天線 x4

RFID 外接天線模組

WLAN(100m)

AP

DataServer