Modeling of a Humanoid and Modeling of a Humanoid and MultiMulti--agent System (MAS)agent System (MAS)EE 382C.9 Embedded Software Systems Spring 2004Literature Survey BriefingbyYuklai SuenMarch 24th, 2004MAS ProjectMAS ProjectObjective–Develop MAS for research and educational purpose, e.g. RoboCup–Agents: humanoid–Base stationSubgoal: Wireless network–Between agents and station–Video TransmissionH: 1feet; W: 4.2 poundsMAS ProjectMAS ProjectBase StationAgentsSensor DataOriginal Focus of the Project: Simulate and evaluate performance of different physical modulation of UWB in video transmission.UltraUltra--wide Band (UWB)wide Band (UWB)Definition and Characteristics [Cramer et al, 2002]–Radio signal with fraction bandwidth larger than 25% over center frequency–Modulate information using series of low-power pulsesAdvantages–Low cost–High data rate and large bandwidth–Low power consumptionDisadvantages–Standard is not yet converged–Consumer products are not yet availableUWB Physical LayerUWB Physical LayerAnalysis [Durisi and Benedetto, 2003] [Hu, 2003] [Molisch et al, 2003]–Analysis of bit-error-rate –Time-hopping–Pulse position modulation–Direct sequence–Phase shift keying–Orthogonal frequency division multiplexing (modern modulation Research results not available–Based on probability density function–Evaluation of UWB for home entertainmentsystemVideo Transmission with UWBVideo Transmission with UWBQuality of Service (QoS)–Prioritization and Resource ReservationMedia Access Control (MAC) Protocol (source: XtremeSpectrum)–IEEE P802.15.3 (USA), HiperLAN2 DM (Europe), and MMAC HisWAN(Japanese)–Optimum MAC/PHY combo for multimedia consumer applicationsNetwork for Video Transmission [Aiello et al, 2003]–Combo of UWB and HiperLAN1 DM–Home EntertainmentEvaluation 802.15Evaluation 802.15Cost Data Rate Power Consumption ApplicationIEEE 802.15 Low 100 Mbps Low home PANIEEE 802.11a High 54 Mbps High public area WANIEEE 802.11b Medium 11 Mbps High public area WANBluetooth Low 1 Mbps Medium PANHome RF N/A11 Mbps N/A Limited SupportHiperLAN High 54 Mbps High public area WANComparing different MAC protocols for Video Transmission1 ms @ app. layer1e-10 to 1e-8100 ms100 kbps – 20 MbpsMPEG-4Max JitterMax BER allowedLatencyPayload RateServiceChange of Focus:Simulate an ad-hoc network for video transmission among the agents and the base station and evaluate the performance at the network level using UWB and IEEE 802.15 or other substitutions(source: XtremeSpectrum)Summary and PlansSummary and PlansSummary–Introduced MAS project–Analyzed and proposed UWB and IEEE 802.15 for wireless video transmission networkPlans–More studies at network level [Qian, 99] [Yang, 2002]–Simulate video sensor networkUsing OpNet or Network Simulator 2 (NS2)Evaluate performance of different MAC
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