AirUnity 545 eNB 2.5GHz (B41) User Guide
UGD-D01127
Airspan Commercial and Internal Use
23
A Abbreviations
Term
Expansion
3GPP
3rd Generation Partnership Project, responsible for LTE
AV-eNB
AirVelocity eNodeB
BER
Bit Error Rate
CN
Core Network
CP
Cyclic Prefix
dB
Decibel. A logarithmic unit used to describe a ratio (such as power ratio in
radio telecommunications)
dBm
An abbreviation for the power ratio in decibels (dB) of the measured power
referenced to one milliwatt (mW). It is used as a convenient measure of
absolute power because of its capability to express both very large and very
small values in a short form
DL
Downlink
EMS
Element Management System
eNodeB
Evolved Node B, is the element in E-UTRAN of LTE
ESP
Encapsulating Security Payloads (ESP) provide confidentiality, data-origin
authentication, connectionless integrity, an anti-replay service (a form of
partial sequence integrity), and limited traffic-flow confidentiality
E-UTRAN
Evolved Universal Terrestrial Radio Access Network, is the air interface of
3GPP's Long Term Evolution
FDD
Frequency-Division Duplexing. A transceiver mode where the transmitter and
receiver operate at different carrier frequencies
GPS
Global Positioning System
IPsec
Internet Protocol Security is a protocol suite for securing Internet Protocol
(IP) communications by authenticating and encrypting each IP packet of a
communication session
LED
Light Emitting Diode
LTE
Long Term Evolution
MAC
Medium Access Controller
– responsible for several functions such
Scheduling, Packet (De) Multiplexing, etc…
MCS
Modulation and Coding Scheme
MIMO
Multiple-Input Multiple-Output
MME
Mobility Management Entity is the key control-node for the LTE access-
network. It is responsible, among other things for idle mode UE tracking and
paging procedure including retransmissions
MTBF
Mean Time Between Failures
OFDMA
Orthogonal Frequency-Division Multiple Access (OFDMA) is a multiple
access version of OFDM digital modulation scheme, used for eNodeB
transmissions to UEs
PDCP
Packet Data Convergence Protocol. A Sub-Layer in LTE responsible for
Security, IP Header (De) Compression, etc…
PTP
Precision Time Protocol is used to synchronize clocks throughout a network.
In this document, PTP is referring to IEEE1588-2008 protocol
QAM
Quadrature Amplitude Modulation
QPSK
Quadrature Phase Shift Keying
RB
Resource Block
RLC
Radio Link Control. A Sub-Layer in LTE responsible for Ack/Nack, error
correction, packet reordering, etc…
ROHS
Restriction Of Hazardous Substances
RRC
Radio Resource Control. A Sub-Layer in LTE responsible for Broadcast of
system information, paging, security functions, radio bearer control, etc…
RRM
Radio Resource Management is used to cover all functions that are related
to the assignment and sharing of radio resources among UEs
SC-FDMA
Single-Carrier FDMA is a frequency-division multiple access scheme, dealing
with the assignment of multiple users to a shared communication resource.
Used in LTE for UE transmissions to the eNodeB
SDR
Software Defined Radio
TDD
Time-Division Duplexing. A transceiver mode where the transmitter and
receiver operate on the same carrier frequency
UE
User Equipment. The end user in LTE
