User's Manual

48 ALFOplus 24GHz (North America) - Release 01.05.0x - MN.00395.E - 004
Fig.16 - Ethernet frame fragmentation disabled
With the fragmentation enabled the time that the packet in higher queues have to wait is smaller. With
fragmentation enabled the radio divides the 1024 byte packet into 4 packets of 256 Bytes and the servant
can transmit the first frame of 256 Byte in the lower queue and then transmit the high priority traffic, re-
ducing the jitter in the network, see Fig.17
.
Fig.17 - Ethernet frame fragmentation enabled
7.5 HEADER PACKET COMPRESSION
The SIAE switch provides header packet compression. This feature allows to compress the packet header
by transmitting over the radio link proprietary labels in place of long and repetitive header field.
Multi-layer Header Packet Compression supports the following protocols: Ethernet, MPLS, IPv4/IPv6, UDP
and RTP and LTE S1 interface tunnelling. This latter cover the case of LTE eNodeB backhauling on S1 in-
terface, where the eUE traffic (either IPv4 or IPv6) is enveloped into a GTP-U tunnel. The Header com-
pressed in this case includes (IPv4+UDP+GTP-U of the S1 interface)+(IPv4/IPv6+UDP+RTP of the eUE
traffic inserted into the tunnel).