Chapter 1
Introduction
RUGGEDCOM WIN
User Guide
8 Scheduling
• Non-Real-Time Polling Service (nrt-PS)
The base station schedules regular transmit opportunities for the subscriber to send variable size data packets.
Typical applications include high bandwidth FTP. The polling period is typically be one second or less, even
during periods of network congestion.
• Best Effort (BE)
The base station schedules transmit opportunities for the subscriber to send traffic based on unused bandwidth
after all higher level traffic scheduling requirements are serviced. Typical applications include Internet access
and email. Best effort service flows can be assigned a priority of 0 to 7.
• Unsolicited Grant Service (UGS)
The base station schedules a continuous series of transmit opportunities for the subscriber to send fixed size
data packets. This schedule supports real-time applications, including VoIP or TDM transport. The UGS pre-
scheduled grants guarantee reserved bandwidth and reduce latency introduced by repetitive grant requests.
The service flow will not transmit packets larger than the nominal grant interval.
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