User's Manual

Table Of Contents
278 BreezeMAX Modular Base Station System Manual
Glossary
BER Bit Error Rate. In a digital transmission, BER is the percentage of
bits with errors divided by the total number of bits that have been
transmitted, received or processed over a given time period.
BPSK Binary Phase-Shift Keying. A data transfer technique. BPSK
transmits data using two phase modulation signals, one phase
representing a binary one, and the other representing a binary zero.
The signal is divided into bits; their status is determined by the
preceding wave. If the wave changes, for example, the signal is
reversed.
BST Base Station
BW Bandwidth
BWA Broadband Wireless Access
CBR Constant Bit-Rate
CG Continuous Grant. Also known as Unsolicited Grant Services (UGS),
is tailored for carrying constant bit- rate (CBR) real-time services
characterized by fixed size data packets on a periodic basis such as
VoIP or E1/T1. Service parameters include unsolicited grant size
(packet size) and normal grant interval (sample interval).
CIR Committed Information Rate. The rate (in bits per second) at which a
network guarantees to transfer information under normal
conditions, averaged over a minimum increment of time.
cPCI Compact Peripheral Component Interface. a new standard for
computer backplane architecture and peripheral integration, defined
and developed by the peripheral component interconnect (PCI)
industrial computers manufacturers group (PICMG). Designed to
provide rugged, high-density systems.
CPE Customer Premise Equipment. Communications equipment that
resides on the customer's premises.
CPLD Complex Programmable Logic Device
CRC Cyclical Redundancy Check. A common technique for detecting data
transmission errors, in which the frame recipient calculates a
remainder by dividing frame contents by a prime binary divisor and
compares the calculated remainder to a value stored in the frame by
the sending equipment.
CS Convergence Sublayer. Particular protocols that are responsible for
gathering and formatting higher layer information so it can be
processed by the lower layers.