26
FiberGateway
Each of these Traffic Classes has an associated scheduler and policer. Queue management is
performed based on Tail Drop or WRED. Then Traffic Classes to P-bit remarking is done and the traffic
is sent to the uplink, Figure 11: Traffic distribution by service/client
.
Figure 10: Upstream QoS diagram
2.6.3
Dynamic Bandwidth Allocation (DBA)
The DBA (Dynamic Bandwidth Allocation) is available in order to optimize the upstream bandwidth. This
mechanism consists in defining an adequate T-CONT to the service traffic in question. There are five
types of T-CONT, defined by the Fixed, Assured and Maximum Parameters:
•
Type 1: Only fixed Bandwidth;
•
Type 2: Only Assured Bandwidth;
•
Type 3: Maximum Bandwidth;
•
Type 4: Only Maximum Bandwidth (Best Effort);
•
Type 5: Fixed+Maximum Bandwidth
T-CONT
(Bandwidth)
Type 1
Type 2
Type 3
Type 4
Type 5
Uni.
Fixed -
R
F
R
F1
0
0
0
R
F5
[b/s]
Guaranteed -
R
A
0
R
A2
R
A3
0
R
A5
[b/s]
Maximum -
R
M
R
M1
=
R
F1
R
M2
=
R
A2
R
M3
>
R
A3
R
M4
R
M5
>
R
F5
+
R
A5
[b/s]
Bandwidth
Eligibility
0
0
Not Assured -
R
NA
Best effort -
R
BE
R
NA
/
R
BE
Tabel 1: T-CONT types definition
In each GPON interface there is 1024 Alloc-ID (T-CONT identifiers) available, provided to manage ONT
services. They are distributed in the following way:
Summary of Contents for FGW GR140DG Wi-Fi 6
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