AirHarmony-4400 (External Cavity Filters) Installation Guide
UGD-D01186
Airspan Commercial and Internal Use
56
Term
Expansion
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 multi-user version of OFDM
digital modulation scheme, used for eNodeB transmissions to UEs
PDCP
Packet Data Convergence Protocol. A Sub-Layer in LTE responsible for IP Header
(De)Compression, etc…
PDU
Protocol Data Unit
PTP
Precision Time Protocol is used to synchronize clocks throughout a network. In this
document, PTP is referring to IEEE1588-2008 protocol
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
RRM
Radio Resource Management is used to cover all functions that are related to the
assignment and sharing of radio resources among UEs
S-GW
Serving Gateway. A Core entity in the LTE EPC architecture responsible for routing and
forwarding user data packets, while also acting as the mobility anchor for the user plane
during inter-eNodeB handovers and as the anchor for mobility between LTE and other 3GPP
technologies
SBA
Switched Beam Antenna
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
SCTP
Stream Control Transmission Protocol is a reliable transport layer
, ensuring in-
sequence transport of messages with congestion control like TCP
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
WEEE
Waste Electrical and Electronic Equipment
