Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
7.9 Filtering multicast management messages from the management port
BPL Multicast management messages from the management port shall only be flooded to the BPL ports (non-BPL
ports excluded).
8 QOS SERVICES
8.1 INTRODUCTION
This section describes mechanisms for applying specific guarantees in terms of bandwidth, latency and reliability to
some flows. It is also possible to define a policy upon congestion. Any flow requiring such guarantees must initiate
a connection through a Connection Admission Control procedure using protocol described in 0.
The mechanisms described here below are designed for flows circulating from the HE to a CPE or vice versa. These
mechanisms have not been designed to support QoS for flows between CPEs,
The QOS services described here below rely on the configuration of several components:
1. Service classes. (Must be declared in all the masters of a BPL cell).
2. Classifier module: this module maps flows onto service classes (preconfigured in all the nodes).
3. Congestion management (declared in all the masters).
4. Traffic specifications, published through the CAC procedure. Pre-determined traffic specifications must be
declared in CPEs.
Note: A flow is a unidirectional data stream exchanged between two BPL units and carried over the same service
class.
BPL network uses a shared medium and provides differentiated control of the medium to handle data transfers with
QoS requirements. QoS services carry out end-to-end traffic delivery providing QoS transport on a per-user basis.
The BPL cell master node will be in charge of schedule and guarantee the QoS of the BPL cell, and must assign
resources to cell nodes based on the configured bandwidth limit and the resources reservations requests made. This
node shall be named QC (quality controller).
Also, there are others figures in the BPL cell which are the Flow Master Nodes (FMNs). A FMN is defined as the
BPL node in charge of guarantee QoS requirement for a registered flow. This node will be the QC and also can be
the BPL repeaters which will distribute the resouces given by the QC to the nodes connected to it.
Submission page 178 UPA-OPERA