User's Manual

Open Information
DESCRIPTION 17 ( 20 )
EAB/RWB/ZG Christina Wilson 18/1551–HRB 105 102/1 Uen
EAB/RWB/Z (Dennis Radenholt) 2003-06-16 B
Prepared (also subject responsible if other) No
Approved Checked Date Rev Reference
E
7.1 lub Interface
The Iub interface is the interface between the RBS and the RNC. The Iub is
subdivided into several protocol layers as follows:
• Physical layer (L1)
• ATM and ATM adaptation layers (L2)
• Network layer (L3) for frame handling
The L3 protocol for the RNC plane is called NBAP. The L2 and L3 part of air
interface channels RACH, FACH, PCH and DCH terminate in the RNC.
From an RBS perspective, the different air interface channels are all treated
as transparent user plane channels.
7.2 Uu Interface
The Uu interface is the radio interface between RBS and the UE. The radio
interface is subdivided into three protocol layers as follows:
• Physical layer (L1)
• Data link layer (L2)
• Network layer (L3)
The L2 comprises of Medium Access (MAC) and Radio Link Control (RLC).
The MAC provides unacknowledged transfer of SDUs between peer MAC
entities, and the RLC provides data transfer of SDU and can also support
the retransmission protocol.
L3 comprises the Radio Resource Control (RRC), which interfaces with L2
7.3 Mub Interface
The Mub is the management interface for the RBS and, in contrast to the Iub, is
not standardized. The interaction between the system and a user is realized by
means of a thin client. The thin client is a computer with basic software, such
as a web browser, installed . The thin client gets software that is dependent on
the managed node by loading Java applets from the node at execution time.
The Mub is based on IP, so the RBS has an IP address. Remote management
uses IP over ATM and on-site management uses Ethernet. The necessary
low-level communication layers including FTP server, HTTP server, ORB and
Telnet server are provided by the common platform.
The management interfaces are shown in figure 6.