Red
MAX
™
Base Station
user manual
Doc. #70-00058-01-01-DRAFT
Proprietary Redline Communications © 2006
November
29,
2006
Page 18 of 106
2.2
IEEE 802.16 / WiMAX Compliance
The IEEE 802.16-2004 specifications describe a PMP broadband wireless access
standard for systems operating in the frequency range of 2-11 GHz, and 10-66 GHz. This
standard includes descriptions for both the Media Access Control (MAC) and the
physical (PHY) layers.
The RedMAX base station base station is compliant to the following IEEE 802.16-2004
WirelessMAN-OFDM and WirelessHUMAN-OFDM Physical Layer Profiles:
- ProfP3_3.5: WirelessMAN-OFDM PHY profile for 3.5 MHz channelization (Rel. 1.0)
- ProfP3_7: WirelessMAN-OFDM PHY profile for 7 MHz channelization (Rel. 1.1)
Note that the 802.16 standards are subject to amendment, and RedMAX product design
compliance applies to a specific revision of the standard. The RedMAX product does not
support mesh communication (direct subscriber-to-subscriber).
Redline is an active member of the IEEE 802.16 standards committee and has been
instrumental in creating the original 802.16 standards. Redline is also active in
recommending, writing and following-up on new amendments to the 802.16
specifications.
Redline is an active member of the WiMAX Forum™ and is participating in
interoperability testing in the WiMAX Forum.
2.3 PHY
Specification
The base station is designed for 2-11 GHz operation based on the WirelessMAN-OFDM
PHY definition in the IEEE 802.16 specification. Refer to the system specifications for
supported frequency ranges.
2.4
OFDM (256 FFT)
The base station uses Orthogonal Frequency Division Multiplexing (OFDM). OFDM is a
multi-carrier transmission technique where the data stream is split and transmitted (at a
reduced rate) in parallel streams on separate sub-carriers. OFDM uses the Fast Fourier
Transform (FFT) algorithm to implement modulation and demodulation functions. Using
adequate channel coding and bit-interleaving, OFDM can perform very well in severe
multipath environments, mitigate frequency selective fading and provide high spectral
efficiency.
2.5 Features
2.5.1 Privacy
The base station is hardware ready to provide encryption for user traffic. The MAC
header of 802.16 contains the information Encryption Control (EC), Encryption Key
sequence (EKS) , and Connection Identifier (CID) necessary to decrypt a payload by the
receiver. Protection of the payload is indicated by the EC bit field. A value of '1' indicates
the payload is cryptographically protected and the EKS field contains meaningful data. A
value of '0' indicates the payload is not cryptographically protected. The EKS field
contains a sequence number used to identify the current generation of keying material.