Tmn Interfaces; Admission Control In Adaptive Modulation (Only With Odu300) - Alcatel-Lucent 9500 MPR User Manual

2.8.13 TMN interfaces

On 9500 MPR-E Network Element the following types of TMN communication interfaces are present:
– TMN channel carried by Ethernet frames in the dedicated TMN port (on the front panel of the Core-
E module) (this port is normally used to connect the WebEML);
– TMN channel carried up to 512 kbit/s channel inside Radio frame;
– TMN channel carried by Ethernet frames in User Ethernet port# 4 (on the front panel of the Core-
E module);
– Two TMN In-band interfaces (by using the Ethernet traffic ports).

2.8.14 Admission control in Adaptive Modulation (only with ODU300)

With the MPT-HC or MPT-HC V2 or MPT-MC the Admission Control is always enabled (and cannot be
disabled). The totat available capacity is the capacity available with the minimum modulation scheme.
2.8.14.1 What does "Admission Control" mean?
The Admission Control is a feature that is available only when operating in Adaptive modulation. It ensures
that the requested TDM flows are kept when the modulation scheme is downgraded automatically by the
system due to the degraded propagation condition.
The Admission Control check is optional: from WebEML, it is possible to decide to enable or not the admis-
sion control check (default value is Enabled).
2.8.14.2 Radio capacity in case of adaptive modulation
When the terminal operates in adaptive modulation, it is possible to commission a total capacity of both
Ethernet and TDM traffic, up to a bandwidth corresponding to the maximum modulation scheme chosen
by the operator. The Table 2. summarizes the E1 equivalent capacity supported by the MPR when using
the adaptive modulation. This capacity depends on the channel spacing and the modulation scheme.
2.8.14.3 Adaptive modulation and admission control enabled
The Admission Control feature allows the operator to protect the TDM traffic when this kind of traffic is
provisioned.
When admission control is enabled (default operator choice), the whole TDM traffic is kept. The maximum
number of E1 links that can be provisioned (or cross-connected in a given radio direction) is the one that
is fitting with 4QAM capacity.
N.B. There is no possibility to provision a number of E1s greater than the one fitting in 4QAM mod-
ulation. Indeed, as all the E1 links have the same priority, it is not possible from a system point
of view to decide "which" E1s should be dropped when the modulation scheme is downgraded
from 16QAM to 4QAM. To secure provisioning and commissioning operations, the admission
control check at WebEML level has been inserted, avoiding a possible mistake from the user
to provision a number of E1s that are not fitting inside 4QAM bandwidth.
User Manual
Product information and planning
Note
3DB18809AAAA Issue 1
9500 MPR Rel. 3.1
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