March 2002 doc IEEE 802 11 02214 r

March 2002 doc. : IEEE 802. 11 -02/214 r 0 A simpler and better EDCF Menzo Wentink Ron Brockmann Maarten Hoeben Intersil Submission 1 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Related letter ballot comments Submission 2 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Categories of LB comments • EDCF justification – Complexity – Performance – can it do the job • EDCF requests for enhancements • No solution for IBSS operation • No proven solution for overlap Submission 3 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Line of thinking Submission 4 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Line of thinking (1) • In the current EDCF, IFS and CW are used for latency and bandwidth differentiation • However: the CW space is limited as a differentiator for both latency and bandwidth, and AIFS is complex • Instead, the CFB length per priority is a more effective bandwidth differentiator • Separate latency and bandwidth differentiation – CW for latency (CWmin/CWmax) – CFB size for bandwidth • Fixed parameter values! Submission 5 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Line of thinking (2) • So for EDCF, we propose to differentiate three parameters: – CWmin, CWmax, CFB length Submission 6 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Applications - bandwidth vs latency 0/1 7/15 CWmin/CWmax 15/1023 25 Mbps 3 ms 64 kbps excellent effort best effort voice 0. 5 ms interactive 10 ms Submission 100 ms CFB length Bandwidth video HDTV Latency 7 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Suggested EDCF default settings priority CWmin CWmax CFB limit 0 (be) 15 1023 1 frame exch. 1 (ee) 15 1023 1. 5 ms 2 (it) 7 15 1 frame exch. 3 – spare - - - 4 (vi) 7 15 3. 0 ms 5 (vo) 0 1 0. 5 ms 6 – spare - - - 7 – spare - - - • RTSThreshold = 300 Bytes. Submission 8 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Simulations Submission 9 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Simulations (1) • 24 Mbps PHY rate, unless noted otherwise • 802. 11 g slots (20 usec) are used, unless noted otherwise • RTSThreshold = 300 Bytes • Simulations are performed with Network Simulator Submission 10 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Simulations (2) • Traffic types in each scenario – Voice: UDP, 290 Byte packets, 30 pps (G. 711) – Video: UDP, 2300 Byte packets, increasing load (+1 Mbps per second) – Data: TCP, 1500 Byte packets • • All flows are upstream Note that the video latency and voice latency plots have a different scale Submission 11 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 16 nodes 7 voice streams 1 video stream 7 data streams (16: 7/1/7) Submission 12 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 nodes voice: CWmin=0, CWmax=1, CFB=0. 5 ms (24 Mbps) video: CWmin=7, CWmax=15, CFB=3. 0 ms (36 Mbps) data: CWmin=15, CWmax=1023 (24 Mbps) throughput per class total throughout video throughput capped when the applied video load exceeds a maximum level - increases linearly with the offered load data throughput voice bandwidth – unaffected by other load Submission 13 applied video load (Mbps) Wentink, Intersil

March 2002 100% doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 nodes voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 time fractions total useful time fraction video fraction data fraction voice fraction Submission 14 applied video load (Mbps) Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 nodes voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video throughput the video throughput rises linearly with the offered video load video throughput is capped when the applied video load exceeds a maximum level applied video load (Mbps) Submission 15 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 nodes voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video latency sharp increase when the offered load exceeds the maximum possible 50 ms Submission the video latency stays low over a very wide range 16 applied video load (Mbps) Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 nodes voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 voice latency 10 ms the voice latency stays very low, even under heavy overload conditions applied video load (Mbps) Submission 17 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Explanation of the EDCF parameters Submission 18 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Why does CFB differentiation work • EDCF assigns TXOPs independent of the TXOP length • Longer CFBs results in higher usage per TXOP, for same CW, thus higher bandwidth • CFBs reduce network contention and increase the efficiency! • Effect of CFBs increases when overall traffic load increases, because the CFBs are more fully used Submission 19 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 CFBs decrease latency and jitter • CFBs help to reduce network contention and collisions – jitter is reduced • CFBs allow to use relatively high CWmin values for high-bandwidth priority streams • Lower CWmin values can be used for lowlatency applications like voice Submission 20 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Another advantage of CFBs • Higher PHY rates result in increasingly inefficient EDCF operation – IFS and slot-time overhead becomes larger compared to the length of frames • Time-limited CFBs easily scale up to higher bitrates by aggregating more frames into a single CFB Submission 21 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 CWmin = 0? • • • Ideal for transmitters with low traffic intensity Exponential backoff ensures CW increase Very often, the medium is free at DIFS – nodes with interrupted backoff never transmit at DIFS, because minimum remaining backoff after deferral is 1 slot --> DIFS+1 is the soonest!!. • Fixed CWmin=0 automatically adapts to the traffic load (more interrupted backoff) Submission 22 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 CWmax • Worst-case latency and jitter are determined by CWmax – after few collisions the current CW can become very large, even when started with a low CWmin – latency insensitive traffic should defer to latency sensitive traffic in case of collisions. – CWmax differentiation helps bounding jitter for low -latency streams • The effect automatically adapts to traffic load, based on fixed CWmax settings Submission 23 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 RTS/CTS • • Protects no-Ack bursts Resolves hidden nodes situations Reduces the cost of collisions The effect scales with the traffic load, based on a fixed RTS threshold Submission 24 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Implementation is extremely simple • • CWmin: existing CWmax: existing CFBs: similar to fragment bursting RTS/CTS: existing No IFS differentiation No new frame formats No dynamic parameter updates • Simple, but the functionality is great! Submission 25 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Conclusions Submission 26 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Conclusions (1) • Excellent support for voice under any scenario (< 10 ms delay) • Excellent support for video (<< 50 ms delay) • Excellent bandwidth and latency differentiation • Very high channel efficiency • Scales transparantly to higher rate PHYs • Works in overlap and non-overlap scenarios • Works for IBSS and infrastructure • Supports unicast, multicast and no-ACK (FEC) • Works upstream, downstream and sidestream Submission 27 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Conclusions (2) • • • Requires no changes to current 802. 11 MAC frames Simple - Minimal set of mechanisms Constant parameters - no parameter-tuning intelligence needed in AP – No possible oscillations between different implementations in overlap situations • Implicit accommodation of bursty traffic • Legacy STAs can participate in Qo. S network, and receive Qo. S flows – No need for legacy upgrade • Simple to Analyze/Simulate/Implement • Predictable behavior • Works with hidden nodes Submission 28 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Default settings (2) • Explanation of the classes – – – Submission be: Best Effort ee: Excellent Effort it: Interactive TCP vi: Video vo: Voice 29 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Motions Submission 30 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Motion 1 • Instruct the Editor to change the words “MPDU or MMPDU” into “CFB” in the first paragraph of 9. 10. 3. – A TXOP obtained by winning EDCF contention may be used to send a CFB with total medium occupancy time not exceeding the TXOP limit from the Qo. S parameter set element in the beacon. […] Submission 31 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Motion 2 • Instruct the Editor to create 8 TXOP limits (from 1), in the Qo. S Parameter Set. Submission 32 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Motion 3 • Instruct the Editor to incorporate changes the TGe draft, such that EDCF differentiation is limited to CWmin, CWmax and the TXOP limit per priority. Submission 33 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Motion 4 • Instruct the Editor to specify the following mandatory default values for the Qo. S Parameter Set, for 802. 11 g and 802. 11 a PHYs: priority CWmin CWmax CFB limit 0 (be) 15 1023 1 frame exch. 1 (ee) 15 1023 1. 5 ms 2 (it) 7 15 1 frame exch. 3 - - - 4 (vi) 7 15 3. 0 ms 5 (vo) 0 1 0. 5 ms 6 - - - 7 - - - – RTSThreshold = 300 Bytes. Submission 34 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Motion 5 • Instruct the Editor to remove the Qo. S Parameter Set from the beacon. Submission 35 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 More simulations Submission 36 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 Simulations • All flows are upstream (sidestream) • Traffic types – voice: UDP, 290 Byte packets, 30 pps (G. 711) – video: UDP, 2300 Byte packets, increasing load (+1 Mbps per second) – data: TCP, 1500 Byte packets • Note that the video and voice latency plots have a different scale • Notation – 4: 1/1/1 for 4 active nodes, 1 voice, 1 video, 1 background – 7 -15 -3. 0 for CWmin=7, CWmax=15, CFB size=3. 0 ms Submission 37 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 4: 1/1/1 7 -15 -3. 0 Submission 38 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 1 voice (24) / 1 video (36) / 1 data (24) / 4 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 throughput per class video load (Mbps) Submission 39 Wentink, Intersil

March 2002 100% doc. : IEEE 802. 11 -02/214 r 0 1 voice / 1 video (36) / 1 data / 4 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 time fractions video load (Mbps) Submission 40 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 1 voice / 1 video (36) / 1 data / 4 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 video throughput 25 Mbps video load (Mbps) Submission 41 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 1 voice / 1 video (36) / 1 data / 4 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 video latency video load (Mbps) Submission 42 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 1 voice / 1 video (36) / 1 data / 4 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 voice latency video load (Mbps) Submission 43 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 18: 7/3/7 7 -15 -3. 0 Submission 44 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 19 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 throughput per class 25 Mbps video load (Mbps) Submission 45 Wentink, Intersil

March 2002 100% doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 19 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 time fractions per class video load (Mbps) Submission 46 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 19 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 video throughput 12 Mbps video load (Mbps) Submission 47 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 19 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 video latency video load (Mbps) Submission 48 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 19 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023, CFB=0 voice latency video load (Mbps) Submission 49 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 16: 7/1/7 15 -15 -4. 5 Submission 50 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 throughput per class video load (Mbps) Submission 51 Wentink, Intersil

March 2002 100% doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 time fraction per class video load (Mbps) Submission 52 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 video throughput 20 Mbps video load (Mbps) Submission 53 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 video latency video load (Mbps) Submission 54 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 1 video (36) / 7 data / 16 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 voice latency video load (Mbps) Submission 55 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 18: 7/3/7 15 -15 -4. 5 Submission 56 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 18 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 throughput per class video load (Mbps) Submission 57 Wentink, Intersil

March 2002 100% doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 18 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 time fraction per class video load (Mbps) Submission 58 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 18 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 video throughput video load (Mbps) Submission 59 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 18 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 video latency video load (Mbps) Submission 60 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 7 voice / 3 video (36) / 7 data / 18 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=15, CWmax=15, CFB=4. 5 ms data: CWmin=15, CWmax=1023, CFB=0 voice latency video load (Mbps) Submission 61 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 8: 3/1/3 7 -15 -3. 5 CCK RTS/CTS Submission 62 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 1 video (36) / 3 data / 8 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 5 ms data: CWmin=15, CWmax=1023 throughput per class video load (Mbps) Submission 63 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 1 video (36) / 3 data / 8 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 5 ms data: CWmin=15, CWmax=1023 time fraction per class video load (Mbps) Submission 64 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 1 video (36) / 3 data / 8 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 5 ms data: CWmin=15, CWmax=1023 video throughput video load (Mbps) Submission 65 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 1 video (36) / 3 data / 8 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 5 ms data: CWmin=15, CWmax=1023 video latency video load (Mbps) Submission 66 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 1 video (36) / 3 data / 8 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 5 ms data: CWmin=15, CWmax=1023 voice latency video load (Mbps) Submission 67 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 10: 3/3/3 7 -15 -3. 0 802. 11 a PHY Submission 68 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 throughput per class video load (Mbps) Submission 69 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 time fraction per class video load (Mbps) Submission 70 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video throughput video load (Mbps) Submission 71 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video latency video load (Mbps) Submission 72 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 voice latency video load (Mbps) Submission 73 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 10: 5/1/5 7 -15 -3. 0 0% PHY frame loss (+ collisions) Submission 74 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 5 voice / 1 video (36) / 5 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 throughput per class video load (Mbps) Submission 75 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 time fraction per class video load (Mbps) Submission 76 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video throughput video load (Mbps) Submission 77 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video latency video load (Mbps) Submission 78 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 voice latency video load (Mbps) Submission 79 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 10: 5/1/5 7 -15 -3. 0 2% PHY frame loss (+ collisions) Submission 80 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 throughput per class video load (Mbps) Submission 81 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 time fraction per class video load (Mbps) Submission 82 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video throughput video load (Mbps) Submission 83 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video latency video load (Mbps) Submission 84 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 voice latency video load (Mbps) Submission 85 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 10: 5/1/5 7 -15 -3. 0 hidden video node Submission 86 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 throughput per class video load (Mbps) Submission 87 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 time fraction per class video load (Mbps) Submission 88 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video throughput video load (Mbps) Submission 89 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video latency video load (Mbps) Submission 90 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 voice latency video load (Mbps) Submission 91 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 8: 3/1/3 7 -15 -3. 0 Best effort at 12 Mbps Submission 92 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data (12) / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 throughput per class video load (Mbps) Submission 93 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data (12) / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 time fraction per class video load (Mbps) Submission 94 Wentink, Intersil

March 2002 25 Mbps doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data (12) / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video throughput video load (Mbps) Submission 95 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data (12) / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 video latency video load (Mbps) Submission 96 Wentink, Intersil

March 2002 doc. : IEEE 802. 11 -02/214 r 0 3 voice / 3 video (36) / 3 data (12) / 10 voice: CWmin=0, CWmax=1, CFB=0. 5 ms video: CWmin=7, CWmax=15, CFB=3. 0 ms data: CWmin=15, CWmax=1023 voice latency video load (Mbps) Submission 97 Wentink, Intersil