User's Manual

Advanced Configuration
• Tolerable Jitter - specified in increments of 1 ms steps from a minimum of 0 ms up to the Maximum Latency (in ms)
• Traffic priority - zero (0) to seven (7), 0 being the lowest, 7 being the highest
• Maximum number of data messages in a burst - one (1) to sixteen (16), which affects the percentage of the maximum
throughput of the system
• Entry Status - Enable, Disable, and Delete
: Note that traffic priority refers to the prioritization of this specific Service Flow.
The device tries to deliver the packets within the specified latency and jitter requirements, relative to the moment of receiving the
packets in the device. For delay-sensitive traffic, the jitter must be equal to or less than the latency. A packet is buffered until an
interval of time equal to the difference between Latency and jitter (Latency - Jitter) has elapsed. The device will attempt to
deliver the packet within a time window starting at (Latency - Jitter) until the maximum Latency time is reached. If the SFC’s
scheduling type is real-time polling (RTPS), and the packet is not delivered by that time, it will be discarded. This can lead to loss of
packets without reaching the maximum throughput of the wireless link. For example, when the packets arrive in bursts on the
Ethernet interface and the wireless interface is momentarily maxed out, then the packets at the “end” of the burst may be timed out
before they can be sent.
Users can set up their own traffic characteristics (MIR, CIR, latency, jitter, etc.) per service flow class to meet their unique
requirements. A good example is provided by the 8 predefined SFCs:
1. UL-Unlimited BE
a. Scheduling Type = Best Effort
b. Service Flow Direction = Uplink
c. Entry Status = Enable
d. Maximum Sustained Data Rate = 102400 Mbps e. Traffic Priority = 0
2. DL-Unlimited BE (same as UL-Unlimited BE, except Service Flow Direction = Downlink)
3. DL-L2 Broadcast BE (same as UL-Unlimited BE, except Service Flow Direction = Downlink)
4. UL-G711 20 ms VoIP RTPS
a. Schedule type = RTPS (Real time Polling Service)
b. Service Flow Direction = Uplink
c. Entry Status = Enable
d. Maximum Sustained Data Rate = 88 Kbps
e. Minimum Reserved Traffic Rate = 88 Kbps
f. Maximum Latency = 20 milliseconds g. Traffic Priority = 1
5. DL-G711 20 ms VoIP rtPS (same as UL-G711 20ms VoIP rtPS, except Service Flow Direction = Downlink)
6. UL-G729 20 ms VoIP rtPS (same as UL-G711 20ms VoIP rtPS, except Maximum Sustained Data Rate and Committed
Information rate = 66 Kbps)
7. DL-G729 20 ms VoIP rtPS (same as UL-G729 20ms VoIP rtPS, except Service Flow Direction = Downlink)
8. DL-2Mbps Video
a. Schedule type = Real time Polling
b. Service Flow Direction = Downlink
c. Initialization State = Active
d. Maximum Sustained Data Rate = 2 Mbps
e. Minimum Reserved Traffic Rate = 2 Mbps
f. Maximum Latency = 20 milliseconds
g. Traffic Priority = 1
Tsunami® 8100 Series - Software Management Guide 77