User's Manual

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Chapter 2 LTE eNB Overview
LTE eNB System Description v2.0 20
Copyright © 2017, All Rights Reserved.
IP Processing
IP QoS
The eNB can provide the backhaul QoS when communicating with EPC by
supporting the Differentiated Services (DiffServ).
The eNB supports 8 classes of DiffServ and mapping QoS between services
classes of the user traffic received from MS and DiffServ classes. In addition, eNB
supports mapping the services classes based on Differentiated Services Code
Points (DSCP) to the 802.3 Ethernet MAC service classes.
IP Routing
Since eNB provides multiple Ethernet interfaces, it stores in the routing table
information on which Ethernet interface of IP packets will be routed to. The
routing table of eNB is configured by the operator. The method for configuring
routing table is similar to the standard router configuration method.
The eNB supports static routing settings, but does not support dynamic routing
protocols such as Open Shortest Path First (OSPF) or Border Gateway Protocol
(BGP).
IP Multicast Routing
The eNB provides multiple Ethernet interfaces, and it stores information on which
Ethernet interface IP packets will be routed to the routing table.
The routing table of eNB is configured by the operator in the similar way to the
router standard configuration. IP multicast is based on PIM and IGMPv2 SSM.
Ethernet/VLAN Interface
The eNB provides Ethernet interfaces and supports the static link grouping, Virtual
Local Area Network (VLAN), and Ethernet CoS functions that comply with IEEE
802.3ad for Ethernet interfaces. The MAC bridge function defined in IEEE 802.1D
is not supported.
The eNB allows multiple VLAN IDs to be set for an Ethernet interface. To support
Ethernet CoS, it maps DSCP value of IP header to the CoS value of the Ethernet
header for Tx packets.
SON Function
The SON function supports the self-configuration, self-establishment and self-
optimization function.
Self-Configuration and Self-Establishment
Self-configuration and self-establishment enable automatic setup of radio
parameters and automatic configuration from system ‘power-on’ to ‘in-service’,
which minimizes the effort in installing the system.