User's Guide Part 3

PureWave Quantum 6600 User Guide v2.1
Page 114
Figure 109: Service Profile ARQ Profile Edit Capability
3.5.5.4 Quality of Service, QoS Profile
A QoS Profile contains all information in regards to QoS type, latency, throughput and etc. These Profiles
are independent of direction and can be applied to multiple service flows. The types of QoS that are
offered are:
Best Effort or BE. Alternatively this is described as MIR or Maximum Information Rate.
Unsolicited Grant Service or UGS. An alternative for this is CIR or Committed Information
Rate.
Extended Real-Time Polling Service or eRTPS. This is also known as Dynamic CIR.
Best Effort is by far the most commonly used QoS type that is configured in the majority of
deployments. It is bursty in nature and provides for up to a maximum rate. As an example, it could
provide for internet speeds of up to 3 Mbps. The disadvantage of a Best Effort Service is that it does not
provide any guarantee that the configured throughput will be achieved. A Base Station will offer
throughput to BE configured Subscribers as long as there is bandwidth available and there are no other
CIR configured Subscriber demanding throughput
Unsolicited Grant Service connections provide for a dedicated and guaranteed Service Level Agreement.
It is typically used for applications that require constant bit rate services such as VoIP. Any traffic
assigned to a UGS service flow will be allocated for the sole use by that Subscriber. The allocated traffic
for this UGS will be removed from the available ‘pool’ of throughput for the Base Station to which the
Subscriber has been configured. UGS connections typically provide low latency which is ideal for VoIP
applications.
Extended Real-Time Polling Service is a QoS type that is very similar to UGS. Traffic is allocated for the
sole use by a Subscriber CPE but only when the Subscriber CPE requests traffic. However, when traffic is