RFID 標準推動論壇. EPCglobal HF V2.0 VS. ISO 主講 : 劉穎昌. 11, Oct, 2007 正隆 RFID 應用驗測中心

Transcription

1 RFID 標準推動論壇 EPCglobal HF V2.0 VS. ISO 主講 : 劉穎昌 11, Oct, 2007 正隆 RFID 應用驗測中心

2 簡報綱要 RFID HF 相關標準簡介 ISO VS. EPCglobal HF V2.0 優劣點比較 結論

3 RFID HF 國際標準 ISO ISO ISO 14443A ISO 14443B 標準名稱 EPC HF V1.0 EPC HF V2.0 發佈單位 ISO ISO ISO ISO Auto_ID Center EPCglobal 未來性

4 RFID HF 相關業者自有標準 / 產品 以 ISO 技術標準修改 Philips I-CODE1, I I-CODE I HSL ST Microelectronic LR512 EM 4135 TI Tag-it HFi Infinion My-D 以 ISO 14443A 技術標準修改 Philips mifare

5 EPCglobal HF V2.0 VS. ISO Interrogator to Tag (R=>T) 差異項目 協定參數功能 ISO EPCglobal HF V2.0 M1-Int: 1C Operating Frequency Accuracy ±100 ppm ±7 KHz M1-Int: 6a T-R Turn-Around Time 0~50us 75.5us M1-Int: 6b R-T Turn-Around Time 0~100us 151~1194us M1-Int: 6c Dwell Time or Interrogator Transmit Power-Down Ramp 0~10us 1500us Max. M1-Int: 6d Deacy Time or Interrogator Transmit Power-Down Ramp 0~10us 500us Max. M1-Int: 7 Modulation PJM (Phase Jitter Modulation) DSB-ASK M1-Int: 7d Modulation Depth N/A 10~30%

6 EPCglobal HF V2.0 VS. ISO Interrogator to Tag (R=>T) 差異項目 協定參數功能 ISO EPCglobal HF V2.0 M1-Int: 8 Data Coding MFM (Modified FM) PIE (Pulse Interval Encoding) M1-Int: 9 Bit Rate Kbps 26.7~100 Kbps M1-Int: 9a Bit Rate Accuracy ±1 % Synchronous to the carrier frequency M1-Int: 13 Bit Transmission Order LSB first LSB first

7 EPCglobal HF V2.0 VS. ISO Tag to Interrogator(T=>R) 差異項目 協定參數功能 ISO EPCglobal HF V2.0 M1-Tag: 1 Operating Frequency Accuracy ±3.013 MHz MHz M1-Tag: 2 Occupied Channel Bandwidth 106 KHz Local Regulation M1-Tag: 6a T-R Turn-Around Time 0~200us 151~1194us M1-Tag: 6b R-T Turn-Around Time 50~100us 75.5us M1-Tag: 7 Modulation Load Modulation ASK M1-Tag: 7e Subcarrier Frequency 969,1233,1507,1808,208 6,2465,2712,3013 KHz 423,847 KHz M1-Tag: 7g Subcarrier Modulation BPSK Manchester M1-Tag: 7h Duty Cycle FM0:50% Subcarrier:50% N/A

8 EPCglobal HF V2.0 VS. ISO Tag to Interrogator(T=>R) 差異項目 協定參數功能 ISO EPCglobal HF V2.0 M1-Tag: 8 Data Coding MFM (Modified FM) FM0 or Manchester M1-Tag: 9 Bit rate Kbps 423, 847 KHz M1-Tag: 11 Preamble MFM (Modified FM) Required M1-Tag: 11a Preamble Length 16 Bits As Specified M1-Tag: 13 Bit Transmission Order LSB first MSB first

9 EPCglobal HF V2.0 VS. ISO Tag Inventory and Access 差異項目 協定參數功能 ISO EPCglobal HF V2.0 M1-P: 3a UID Length 64 Bits 96 Bits M1-P: 3b Format UID EPC M1-P: 6 Read Transaction Time 1.282ms+150us Varied With R=>T & T=>R rate and number of bits M1-P: 7 Write Transaction Time 1.282ms+75.5us 20ms Max. M1-P: 8 Error Detection R=>T 16 Bits CRC R=>T Select: CRC-16 T=>R Query: CRC-5 32 Bits CRC Access: CRC-16 Inventory: Command Length T=>R PC, EPC: CRC-16 RN16: CRC-5 or CRC-16 Handle: CRC-16

10 EPCglobal HF V2.0 VS. ISO Collision management 差異項目 協定參數功能 ISO EPCglobal HF V2.0 M1-A: 2 Linearity <10000 Tags => Linear >10000 Tags => Polynomial <2 15 Tags => Linear M1-A: 3 Tag Inventory Capacity >32000 Unlimited M1-A: 4 Multiple Tag Identification Rate 100 Tags/150ms N/A

11 ISO 感應距離 : 0~90 公分 ( 與 ISO 相當 ) 10~40 個 Tags/ 秒 Mode 1: 以 ISO 為基礎 Reader to Tag Data Rate: 1.65~26.48 Kbps Tag to Reader Data Rate: Kbps Mode 2: ISO 技術特色 使用 PJM(Phase-Jitter Jitter Modulation) Reader to Tag Data Rate: Kbps Tag to Reader Data Rate: Kbps/ch (8 ch.s)

12 ISO Mode 1 優點 6 家國際 IC 大廠支持 9 家 Reader 產品製造商 技術成熟度高 缺點 資料讀取速率慢 ISO 技術特色

13 EPCglobal HF V2.0 技術特色 EPCglobal HF V2.0 參考 UHF Gen.2 Protocol 感應距離 : 0~90 公分 ( 與 ISO 相當 ) 10~160 個 Tags/ 秒 Reader to Tag Data Rate: 26.7~100 Kbps Tag to Reader Data Rate: 423~847 Kbps

14 EPCglobal HF V2.0 優點 由 ISO Mode 1 技術延伸, 可得到較多之廠商支持 更高之資料讀取速率 (26 Kbps up to 53 Kbps) 引用 UHF Gen. 2 部份邏輯層技術, 提升讀取速度及穩定性 Reader 設計上也會因 Tag 延伸使用 Gen.2 部份技術, 而使得 UHF 及 HF Reader 整合一起的軟硬體成本大幅下降 缺點 EPCglobal HF V2.0 技術特色 標準仍待審議, 尚有變數 即使標準公佈, 仍需待一段時間產品及技術才會成熟

15 EPCglobal HF V2.0 VS. ISO 標準差異項目 Reader=>Tag 通信共 20 項. Tag=>Reader 通信共 22 項. Tag 讀寫參數共 7 項. 抗碰撞通信參數共 3 項.

16 1 QP * CLRWR Ref -5.5 dbm HF-MOD Center MHz Date: 19.SEP :55:16 * Att 50 db 100 khz/ * RBW 9 khz * VBW 10 MHz * SWT 300 s Span 1 MHz B SGL Forward Link Setup Time Domain Frequency Spectrum RF Field Configuration Modulation Signal Tag Reply Modulated RF

17 Forward Link

18 Forward Link

19 Forward Link The Tari at the highest data rate allows us to meet the tag mask. At the slowest data rate, the tag mask can be met by reducing the output power. Average Data-rate 32 kbps varible Tari 84 kbps 96 kbps Tari 25 µs 9,5 µs 8,3 µs Pulse width 6.6 µs (shaped cosine) 4 µs 4 µs Maximum allowed output field strength 36 dbµa/m 45 dbµa/m 42 dbµa/m

20 Return Link Time Domain Configuration and output of epc-number Modulation Signal Tag Reply Modulated RF

21 Return Link All different modes specified in the protocol were tested. All test conditions showed that the tag replied to the configured data rate within the required timing.

22 Return Link

23 Return Link

24 Return Link

25 Return Link

26 Anticollision & Noise

27 Anticollision & Noise

28 Anticollision & Noise

29 Anticollision & Noise FM0 modulation 1. Selected because it was the best performer but was susceptible to noise 2. Simulation will show the degree of susceptibility to noise Manchester modulation 1. Selected because it was the slowest modulation method 2. Simulation will show what happens when firmware upgrades are made to existing readers

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31 結論 新技術的誕生會有對應的標準 了解了標準才能掌控應用! 正隆 RFID 應用驗測中心 Tel: ext 517, 518