Ericsson MINI-LINK BAS User Manual

4-3 MINI-LINK BAS
EN/LZB 111 0542 P2B Technical Description
4.2 Data Communication
Enterprise data equipment with Ethernet interfaces connects directly
to MINI-LINK BAS FlexNU Ethernet interfaces. Typical data
equipment represents routers and layers 2/3 switches.
The FlexNU encapsulates Ethernet frames in ATM cells, in agreement
with RFC1483.
Data services are offered using a UBR best effort service category. As
an option, connection admission control, always executed in case of
CBR connections, can also be activated for data UBR connections.
The option is selectable on SN basis.
The best effort service category allows the maximum utilisation of the
air interface bandwidth. The MAC protocol serves on a fair basis the
traffic offered by the different ATs. The minimum guaranteed
bandwidth per end user is controlled dimensioning the number of ATs
planned in the sector and the number of Ethernet interfaces active per
AT.
A reduction of the air interface capacity is programmable by the EM.
This control of the allocated sector capacity allows to balance the load
on the different sectors with the aim to prevent the allocation of an
excessive bandwidth to ATs located in not fully deployed sectors.
This plain best effort service is the only service available for the built-
in Ethernet interface.
On the Ethernet SUs an additional traffic management function is
available: the peak cell rate shaping of the traffic at each Ethernet
interface. This allows the control of the maximum additional best
effort bandwidth that an end-user can access in addition to the
minimum guaranteed. The peak cell rate value can be set using the
EM.
The option of activating connection admission control allows the
provision of a guaranteed bandwidth to each end-user exceeding the
minimum allowed by the specific sector configuration. In this case
statistical multiplexing is not used at the air interface. Connection
admission control is executed by the system to control the bandwidth
availability when a new connection is reserved.
In the downstream direction the MINI-LINK BAS supports
differentiation between CBR and UBR traffic flows. Shaping or
minimum guaranteed bandwidth has to be provided by the NE sending
traffic towards the system. Therefore, when the minimum guaranteed
bandwidth is desired suitable ATM service categories like UBR +
have to be used in the ATM backbone network.

Ericsson MINI-LINK BAS Specifications

General

Brand	Ericsson
Model	MINI-LINK BAS
Category	Wireless Access Point
Language	English