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Report No.: EM201300471-1 Application No.:
ZJ00032008 Page 43 of 57
4.6 MEDIUM ACCESS PROTOCOL
4.6.1 DEFINITION
EN 300 328 V1.7.1 4.5.3: A medium access protocol is a mechanism designed to facilitate
spectrum sharing with other devices in a wireless network.
4.6.2 REQUIREMENT
A medium access protocol shall be implemented by the equipment.
On the basis of the latest list of harmonized standards under the R&TTE Directive 1999/5/EC which was
published on October 23, 2012 in Official Journal C321 contains the following (mandatory) guidance: The
efficiency of the various sharing mechanisms can be assessed using the appropriate
clauses of EN 300328 version 1.8.1.”
In addition, this requirement does not apply for equipment with a maximum declared RF Output power
level of less than 10 dBm e.i.r.p. or for equipment when operating in a mode where the RF Output power
is less than 10 dBm e.i.r.p.
Adaptive Frequency Hopping equipment is allowed to operate in a non-adaptive mode providing it
complies with the requirements applicable to non-adaptive frequency hopping equipment.
Adaptive Frequency Hopping equipment is allowed to have Short Control Signalling Transmissions (e.g.
ACK/NACK signals, etc.) without sensing the frequency for the presence of other signals. See clause
4.3.1.6.3.
Adaptive Frequency Hopping (AFH) equipment uses a Detect And Avoid (DAA) mechanism which allows
an equipment to adapt to its environment by identifying frequencies that are being used by other
equipment.
Adaptive Frequency Hopping systems shall implement either of the DAA mechanisms provided in clauses
4.3.1.6.1 or 4.3.1.6.2.
4.6.3 FREQUENCY HOPPING SYSTEM
This transmitter device is frequency hopping device, and complies with EN 300 328 4.3.5
standard.
This device uses Bluetooth radio which operates in 2400~2483.5MHz band. Bluetooth uses a
radio technology called frequency-hopping spread spectrum, which chops up the data being
sent and transmits chunks of it on up to 79 bands(1MHz each; centered from
2402~2480MHz) in the range 2400~2483.5MHz. The transmitter switches hop frequencies
1600 times per second to assure a high degree of data security. All Bluetooth devices
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