Changes between Version 12 and Version 13 of 802.11/wlan_exp/app_notes/dcf_with_multiple_flows
- Timestamp:
- Apr 17, 2014, 7:33:13 AM (10 years ago)
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802.11/wlan_exp/app_notes/dcf_with_multiple_flows
v12 v13 43 43 * Packet Length: 1400 byte payloads (1428 bytes OTA with MAC header and FCS) 44 44 * PHY Rate: 18 Mbps 45 * Trial Duration: 90 seconds 45 46 46 47 === Baseline: Performance of Each Flow in Isolation === 47 48 48 As a first cut, we establish the best-case performance for each backlogged flow by running a series of experiments with only on flow enabled at a time. 49 As a first cut, we establish the best-case performance for each backlogged flow by running a series of experiments with only on flow enabled at a time. To do this, we use the WLAN Experiment Framework to reset the nodes, set the PHY rate, and then start locally generated traffic from the nodes. The script used for this is provided below in the [#Resources Resources] Section. 49 50 50 51 || Non-Simultaneous || Throughput (Mbps) || … … 54 55 || Flow 4 || 14.07 || 55 56 57 Each flow, on its own, is capable of achieving ~14Mbps out of the 18Mbps PHY rate. This is near the theoretical maximum throughput, given the unavoidable MAC overhead of the 802.11 DCF. Each flow in the network sees a high-quality link through the RF cabling and attenuators -- there are virtually no PHY packet losses due to outage. 56 58 57 59 === Performance of Simultaneous Flows === 58 60 59 61 … … 66 68 * Packet Length: 1400 byte payloads (1428 bytes OTA with MAC header and FCS) 67 69 * PHY Rate: 18 Mbps 70 * Trial Duration: 90 seconds 68 71 69 72 == Resources ==
