PPT Slide

1. Backbone BW large

relative to access

2. Flow identity allowed on access

links, but not in the backbone

3. RSVP pkts delivered through but

not processed within the backbone

4. End-to-end signaling allowed (RSVP)

but transparent to the backbone

5. Pkts marked before entering the backbone if QoS

is desired on the basis of appl. Flows or pkt classes

6. Pkts policed at network edge according to profiles negotiated

with and managed by the backbone provider

7. Queues with different priorities and discard probabilities at congestion points (access links)

8, This approach works with both Int-serv and Diff-serv models

Sender

Receiver

backbone

CN 1

CN 2

Policy Server, Bandwidth Broker

Pkts marked to receive diff network resource and service priorities, shaping optional

Separate queues for pkts with diff

marks are given diff. transmission

Prirotities and discard prob.

Overview of Access QoS