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Adopting Cisco's FastLane for Clinical Comms (Aug 2017)

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page 8 Cisco Validated Design Introduction FasT lane ObservaTIOns—paTIenTsaFe sOlUTIOns This section discusses the tests that were performed in the Cisco RF Validation labs. Statistical analysis was per- formed on the RF packet captures on each of the access points within the lab. The findings about the improve- ments that Fast lane enables are based on this analysis. Testing Strategy The strategy was to baseline the wireless network with Fast lane enabled, during active calls when one of the iPhone users was mobile. This test consisted of walking a predefined loop while introducing audio on both mo- bile handsets. Roaming occurred between 3 APs along the path while a fourth AP was available in an 802.11k neighbor list. This AP (AP29) was strategically placed so that it would appear in the neighbor list but was not an optimal roaming candidate. Figure 5 Cisco RF Validation Lab—Testing Loop Real-time interactive voice traffic has a unique characteristic; because it is real-time, the sampled audio stream is digitized and a data packet is transmitted every 20 ms (.02 seconds). This works out to a steady packet flow of 50 packets per second. This makes it easy to see the before and after effects of Fastlane. Any delays or retransmissions in transmitting these packets on timed bases are easy to spot by using statistical analysis and inspection.

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