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Optimizing Data Rate Availability for 433MHz in Japanese RR with UHF LSI Technology

This submission explores data rate availability utilizing UHF LSI technology within the Japanese RR spectrum at 433MHz. The study aims to enhance understanding of Japanese RR regulations regarding wireless personal area networks. It evaluates the feasibility of achieving high reading rates, automatic identification of container numbers, and seal monitoring functions at a low cost. Utilizing the market-available LSI SI4421, a data rate of 38.4Kbps is achieved, with considerations for power and duty limitations. Results suggest a maximum reading time for 10000 tags in a container yard setting, with potential optimizations through CSMA protocols. The study highlights the potential applications in international logistics and the need for tailored solutions to meet user requirements efficiently.

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Optimizing Data Rate Availability for 433MHz in Japanese RR with UHF LSI Technology

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  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Data rate availability in 433MHz with in Japanese RR] Date Submitted: [17 May, 2010] Source: [Masashi Shimizu] Company [NTT] Address [239-0847 1-1 Hikarinooka Yokosuka Japan] Voice:[+81 468 59 8695], FAX: [+81 468 59 3351], E-Mail:[shimizu.masashi@lab.ntt.co.jp] Re: [ Abstract:[This document has been shown data rate availability by using market available typical UHF LSI to keep Japanese RR in 433MHz] Purpose: [Understanding Japanese RR] Notice: . Release: ..

  2. Data rate availability in 433MHz with in Japanese RR NTT Masashi Shimizu

  3. 1.74MHz 10mW ETSI (ECC DEC(04)02) 1MHz 5.6mW USA (FCC15.240) 200KHz 1mW DUTY 10% Japan (ARIB STD-T92) 433.05 433.5 433.82 434.02 434.5 434.79 433.92MHz 433MHz

  4. Assumed 433MHz basic system Wakeup Tags Ack Command Interrogator Response

  5. 433MHz in JAPAN

  6. User requirements • 433MHz can be use just international logistics. It means user or this products will be limit for international logistics companies. • Low cost • High reading rate • Automatic Identifying the container number • Seal monitor function

  7. Data rate limit by using market available LSI(SI4421) 38.4Kbps BFSK Deviation 30KHz makes 180.5KHz bandwidth

  8. SIPG Container Yard A 300m radius cell is assumed. One island block is composed of 40X6X6 containers. One reader can cover 8 islands. This means there are 11520 containers in a cell maximum.

  9. Estimated Reading time of 10000 Tags in a Cell Beacon Interval TX time: 10mSec 38.4Kbps 384bit payload including Preamble and CRC PA Pure ALOHA CS -100 CSMA With -100dBm sensitivity CS -110 CSMA With -110dBm sensitivity

  10. Results • 38.4Kbps is the maximum data rate within market available UHF LSI to keep Japanese RR in 433MHz. • To read 10000 tags (based on real container yard situation) it is need 5000 second with 200 second beacon interval. • It can reduce to 800 second by using CSMA. • It is need some real use dense models, power and duty limitation should be set for beacon only tags to achieve optimal reading time.

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