Reliability and robustness is the top concern for real-time wireless communication Adverse wireless medium Large scale path-loss Multipath 班 Persistent electric magnetic interference Same-band/adjacent- band re devices
Reliability and Robustness is the top concern for real-time wireless communication. Adverse wireless medium Large scale path-loss Multipath Persistent electricmagnetic interference Same-band / adjacentband RF devices
Nowadays wireless lans are not real-time EEE802.11b EEE802.11 MACA EEE802.11e MACAW IEEE 802. 11a EE802151EEE802154 1994 1999 2002 2003 2005
Nowadays wireless LANs are NOT real-time. MACA MACAW IEEE 802.11b IEEE 802.11a IEEE 802.11g IEEE 802.11e IEEE 802.15.1 IEEE 802.15.4 1994 1999 2002 2003 2005
Nowadays wireless lans are not real-time EEE802.11 0.8 packet loss rate in an industrial 0.6 environment正 TWilligo2 04 0.2 100 120 140 160 180 Trace ID( 87sec/trace)
Nowadays wireless LANs are NOT real-time. IEEE 802.11 packet loss rate in an industrial environment [Willig02] Trace ID (87sec/trace)
Nowadays wireless LANs are NoT real-time 45 EEE802.11 40 packet loss rate in an ◆250Hz I 200 Hz ofTIce environment [Ploplys04 80°m 25 ▲167Hz 15 10 5 0 05101520253035404550 SNR [dB]
Nowadays wireless LANs are NOT real-time. IEEE 802.11 packet loss rate in an office environment [Ploplys04]
Nowadays wireless LANs are NoT real-time 45 EEE802.11 40 packet loss rate in an ◆250Hz 200Hz oTTIce environment [Ploplys04 000m0 hy? ▲167H 0 10 15 SNR dB
Nowadays wireless LANs are NOT real-time. IEEE 802.11 packet loss rate in an office environment [Ploplys04] Why?