Refs. 769501-769502 Wi-Fi Antennas; Multiple Qos Per Vlan; Policing/Rate Limiting; Downstream Qos - Televes 769501 User Manual

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2.12.3 Refs. 769501-769502 WI-FI Antennas

The ONT provides a MIMO 2x2 topology Wireless antenna capability.

The ONT has internal, Omni-directional antennas with a gain of 1.6dBi.

The Refs. 769501-769502 supports 802.1p QoS per VLAN services in which several flows (one per allowed pbit) are embedded in the same VLAN.

According to the applied configuration, the Refs. 769501-769502 performs a per-flow QoS policy: dropping traffic marked with not allowed pbits

and limiting to the configured value the data rate of the allowed flows.

The Refs. 769501-769502 performs transparent VLAN translation. It is transparent to upper layer protocols, such as ARP, RIP, DHCP, IGMP, PPP, etc.

The OLT system provides several QoS mechanisms, that can be targeted to the flow characterized by one or two VLAN according with the type of

service, or can be targeted to the packets priority, where each p-bit is mapped in one of eight queues of each port.

For each OLT ports are associated eight queues, for each of these queues is possible to configure the p-bit mapping in one of the queues, the

scheduler type (Strict Priority or Weighted Fair Queuing) and the minimum and maximum bandwidth of each queue.

In the downstream direction the ingress traffic first passes by a policer configured to each ONT service, which is defined by one or two tags. After

this the traffic is put in a queue according with the p-bit/queue mapping. Each of these queues is associated with a scheduler and a policer. Then

the traffic flows to the GPON interface and when it arrives to the ONT it will pass by a mapping block which will map the traffic in one of the eight

queues according with the p-bits, these queues have a Strict Priority scheduler in order to guarantee that the most prioritized traffic passes first.

Figure 2-10: Downstream QoS Diagram

In the upstream direction, for each T-CONT the ingress traffic in the ONT passes by a mapping block that maps the traffic in one of the eight queues

according with the p-bit, these queues have a Strict Priority Scheduler. The ONT "waits" until the OLT assigns a transmission timeslot for that T-

CONT, so that the most prioritized queues are the ones that transmit first. In the OLT ingress, the traffic is put into a queue according with what

is defined in the queue/p-bit mapping. Each of these queues has an associated scheduler and policer that control the traffic sent to the uplink.

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