User's Manual

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Chapter 3 System Structure

LTE eNB System Description v2.0 39

 Access Control List (ACL)

 MAC filtering

 IP Packet forwarding

 IP fragmentation and reassembly

 Link aggregation

 VLAN termination

 ACL (Access Control List)

Middleware (MW)

The MW ensures seamless communication between OS and applications on

various hardware environments. It provides a Message Delivery Service (MDS)

between applications, Debugging Utility Service (DUS), Event Notification

Service (ENS), High Availability Service (HAS) for redundancy management and

data backup, Task Handling Service (THS), and Miscellaneous Function Service

(MFS).

 MDS: Provides all services related to message transmitting and receiving.

 DUS: Provides the function for transmitting debugging information and

command between applications and operator.

 ENS: Adds and manages various events such as timers, and provides the

function for transmitting an event message to destination at the time when it is

needed.

 HAS: Provides the data synchronization function and the redundancy state

management function.

 THS: Provides the task creation/termination function, task control function,

and function for providing task information, and so on.

 MFS: The MFL is responsible for all hardware-dependent functions, such as

accessing physical addresses of hardware devices.

IP Routing Software (IPRS)

The IPRS is the software that provides IP routing and IP security function for eNB

backhaul. The IPRS is configured with IPRS, IP Security Software (IPSS) and

Dynamic Host Configuration Protocol (DHCP), and each of them provide the

functions as follows.

 IPRS: Collects and manages the system configuration and status information

necessary for IP routing. Based on this data, IPRS provides the function for

creating routing information.

o Managing Ethernet, VLAN-TE, and link aggregation

o IP addresses management

o IP routing information management

o QoS management