Opticon Sensors Europe BV EE201 사용자 설명서
EE202 Specifications manual
energy and signal management functions. It operates on the above mentioned frequency
band. The PHY layer is 100% compliant and is based on direct sequence spread
spectrum (DSSS) technique with a transfer rate of 250 kbit/s.
band. The PHY layer is 100% compliant and is based on direct sequence spread
spectrum (DSSS) technique with a transfer rate of 250 kbit/s.
7.1.2.
The medium access control layer
The medium access control (MAC) layer enables the transmission of MAC frames through
the use of the physical channel. Besides the data service, it offers a management
interface and itself manages access to the physical channel. It also controls frame
validation, guarantees time slots and handles node associations. Finally, it offers hook
points for secure services. The EE202 does not make use of the optional network
beaconing, instead it used a polling mechanism to increase power efficiency. Some
changes are made to the standard to allow for more efficient data frames and better
power efficiency, especially when nodes are not connected to a base station.
the use of the physical channel. Besides the data service, it offers a management
interface and itself manages access to the physical channel. It also controls frame
validation, guarantees time slots and handles node associations. Finally, it offers hook
points for secure services. The EE202 does not make use of the optional network
beaconing, instead it used a polling mechanism to increase power efficiency. Some
changes are made to the standard to allow for more efficient data frames and better
power efficiency, especially when nodes are not connected to a base station.
7.2. Security
By default only the image transmission is encrypted using a proprietary encryption
protocol. Enhanced encryption/authentication can be requested on demand by loading
different firmware on the ESLs in combination with the loading of an encryption key and
an additional ESL server module. The protection method for RF-communication is done
by 128-bit AES encryption.
protocol. Enhanced encryption/authentication can be requested on demand by loading
different firmware on the ESLs in combination with the loading of an encryption key and
an additional ESL server module. The protection method for RF-communication is done
by 128-bit AES encryption.
8. Labeling
8.1. Product label
The product label is affixed to the ESL as shown below.
Figure 2: product label
9