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September 2010

Slide 1

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: [Narrow band frequency channel plan in 433MHz band for Active RFID]

Date Submitted: [September 13 2010]

Source: [Masashi Shimizu (NTT)]Address [shimikzu.maashi@lab.ntt.co.jp]Voice:[], FAX: [], E-Mail:[]

Re: []

Abstract: [Channel plan for 433MHz Active RFID systems to satisfy Japanese RR]

Purpose: [World wide use of 433MHz]

Notice: This document has been prepared to the channel plan to satisfy Japanese narrow 433MHz band .Release:

Masashi Shimizu (NTT)

doc.: IEEE 802. 15-09-0697-05-004f

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Narrow band frequency channel plan in 433MHz band for Active

RFIDMasashi Shimizu

NTT Network Innovation Lab

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Constrained Condition

• Japanese frequency allocation is from 433.67MHz to 434.17MHz.

• Occupied bandwidth is narrower than 200KHz for Tag side.　 TX power is lower than 0dBm EIRP.

• 433MHz band must be used for international logistics only.

• Occupied bandwidth is defined as 99% power.• Data rate should be set harmonics of 1Mbps

which is 802.15.4 basic data rate . (1000,500,250,125,62.5,31.25Kbps)

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Bandwidth measurements 31.25Kbps MSK

-20dBc bandwidth 43KHz99% power Band width 38KHz

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Benefit of “433 MHz Narrow Band Active RFID”

• It can be used world wide for international logistics (i.e. ocean container tracking) without interference from WiFi.

• EPC global has been discussed this issues.

• The narrow band RFID can expand communication range compare with the wide band Active RFID under the same power, modulation and coding.

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Sensitivity

DataRate(Kbps)

99%BW(KHz)

20dBcBW(KHz)

FilterBW(KHz)

Sensitivity atPer 0.1 (dBm)

31.25 46.54 53.82 58 - 10162.5 82.01 93.09 81.25 - 99250 305.45 352.73 541 - 92

PER vs. Receiving Signal Strength Intensity

0.01

0.1

1

- 105 - 100 - 95 - 90 - 85

RSSI(dBm)

PER

31.25Kbps62.5Kbps250Kbps

Sensitivity was measured by using CC430 test board in case of 31.25Kbps, 62.5Kbps and 250Kbps respectively. Tx and RX were connected through the attenuator.

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Channel Isolation 250Kbps

-70

-60

-50

-40

-30

-20

-10

0

10

433 433.5 434 434.5

EU FAL250KbpsCh1Ch2Ch3

250Kbps 580KHz ChannelCh Center Low High

1 433.34 433.05 433.632 433.92 433.63 434.213 434.5 434.21 434.79

-70

-60

-50

-40

-30

-20

-10

0

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433 433.5 434 434.5

EU FAL250KHzCh1Ch2Ch3

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Channel Isolation 31.25Kbps 60KHz Channel

-60

-50

-40

-30

-20

-10

0

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433.4 433.6 433.8 434 434.2 434.4 J P FAL32.25KbpsCh1Ch2Ch3Ch4Ch5Ch6Ch7

32.25Kbps 60 KHz BWCh Center Low High

1 433.74 433.71 433.772 433.8 433.77 433.833 433.86 433.83 433.894 433.92 433.89 433.955 433.98 433.95 434.016 434.04 434.01 434.077 434.1 434.07 434.13

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Example of Channel Plan

433.7 433.75 433.8 433.85 433.9 433.95 434 434.05 434.1 434.15

Allocated Frequency433.67-434.17

433.74

433.80

433.92

433.86 433.98

434.04

434.10

31.25Kbps, 60KHz separation,100KHz bandwidth (99% power) is assumed.In order to have certification of 433MHz Band, only edge channels (Ch1,Ch7) are critical. It is no concept of channels in Japanese RR of 433MHz, the bandwidth will be checked at only lower than 433.67MHz and higher than 434.17MHz.

edge of 100KHzband

Ch1 Ch2 Ch3 Ch4 Ch5 Ch6 Ch7

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Future work

• We understood Japanese 433MHz RR is not meet world wide standards.

• We will continue to negotiate with Armature Radio to open more wide band and to lift the usage limitation.

• We already started this work using the special frequency zone program governed with Japanese Ministry of Internal Affairs and Communications using car export lane.

• After IEEE802.15.4 defines new standards, we will use this spec for negotiations.