ATA559001-DDT Atmel, ATA559001-DDT Datasheet - Page 41

• Manufacturer Part Number: ATA559001-DDT
• Description: RF Wireless Misc UHF (1kbit r/w anti-collision)
• Manufacturer: Atmel

Figure 4-22. Example for a Two-level Selection Process Over Time
4817C–RFID–03/07
Reader
Tag 1
Tag 2
Tag 3
Next slot
Listening and receiving
Backscattering the ID
Figure 4-21. Flow to Implement a Second Selection Level in Aloha
silent
silent
the ID
slot n
Next slot
detected
no tag
next slot
Listening and detection
Backscattering the ID
Backscattering the ID
of collision
Communication with the
Start of Aloha in level 0
close Aloha command
Reader is listening
Send next slot or
detected tag
to the tags
one tag detected
Deterministic anticollision
but arbitration
Deterministic
anticollision
lost
Deterministic anticollision
Close Aloha
(Anticollision level 2)
slot n + 1
more than one tag
Start with slot 1
silent
silent
in the slot
Start of a second arbitration
Anticollision procedure of
Deterministic anticollision
silent
level 1
level
Next slot
ATA5590
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