Airlogic ABM-400 Manual de usuario descargar pdf (Pagina 36)

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ZigBee:

It provides digital radio communications between computers and others electronic devices. It is

suitable for wireless sensor/control network. Where the network consist of large number of

devices and large coverage area and the device data rate needs are low. ZigBee has been ratified

in late 2004 under IEEE 802.15.4 wireless networking standards.

RFID:

It is a well known technology that has recently received a lot of endorsement from the U.S

government and the retail industry. ISO has developed RFID standards for automatic

identification and item management. This standard, known as the ISO 18000 series, covers the

air interface protocol for systems likely to be used to track goods in the supply chain. The UHF

band is most common for supply-chain and industrial automation applications. As a result, EPC

Global has also developed Gen 2 RFID standard for system operating in the UHF band. This

standard is expected to be ratified as ISO 18000-6C.

Table1.

Summary of the Prominent Wireless Technology

Frequency Range Data Transfer

Rate

Advantages

WiFi

802.11a: 5 GHz

range

802.11b: 2.4

GHz

802.11g: 2.4

GHz

~100 m

1 – 54 mbps

- Cost-effective network

- Supports mobile communications

- Can be used with wired networks

- IP based

Bluetooth

2.402 – 2.48

GHz

~ 10 m

120 – 723

kbps

- Low power

- Low cost

- Provides easy access to wired LAN

and Internet.

- Powerful security features with

SAFER+ (Secure And Fast Encryption

Routine)

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