RedMax AN-100U, User Manual, Page: 103 / 106

Red MAX
™
Base Station
user manual
Doc. #70-00058-01-01-DRAFT Proprietary Redline Communications © 2006 November 29, 2006
Page 103 of 106
Term Acronym Definition
Quadrature
Amplitude
Modulation QAM Quadrature Amplitude Modulation (QAM) is a method
of combining two amplitude-modulated (AM) signals
into a single channel, doubling the effective
bandwidth. QAM is used with pulse amplitude
modulation (PAM) in digital systems, especially in
wireless applications.
In a QAM signal, there are two carriers, each having
the same frequency but differing in phase by 90
degrees. One signal is called the I signal, and the
other is called the Q signal. Mathematically, one of the
signals can be represented by a sine wave, and the
other by a cosine wave. The two modulated carriers
are combined at the source for transmission. At the
destination, the carriers are separated, the data is
extracted from each, and then the data is combined
into the original modulating information.
Quality of
Service QoS - Minimum Reserved Traffic Rate (CIR)
- Maximum Latency
- Maximum Sustained Traffic Rate (PIR)
- Traffic Priority
Real-Time
Polling Service rt-PS The rt-PS is intended to support real-time service
flows that generate variable size data packets on a
periodic basis, such as moving pictures experts group
(MPEG) video. The service offers real-time, periodic,
unicast request opportunities, which meet the flow’s
real-time needs and allow the Subscriber to specify
the size of the desired grant. This service requires
more request overhead than UGS, but supports
variable size grants for optimum data transport
efficiency.
Receiver
Sensitivity - A measurement of the weakest signal a receiver can
receive and still correctly translate it into data.
RSSI RSSI Received signal strength indicator.
Scope - A group of network entities administered by a DHCP
Server via its configuration file that get IP addresses
in the same subnet. A scope can define common and
individual properties for all network entities getting an
IP address from that subnet.
Security
Association SA The set of security information base station and one
or more of its client subscribers share in order to
support secure communications. This shared
information includes traffic encryption keys and cipher
block chaining initialization vectors.
Security
Association
Identifier SAID An identifier shared between base station and
subscriber that uniquely identifies a security
association.