Mobile Communications I - IHP Microelectronics

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<strong>Mobile</strong> devicesPager• receive only• tiny displays• simple textmessagesPDA• graphical displays• character recognition• simplified WWWLaptop/Notebook• fully functional• standard applicationsSensors,embeddedcontrollerswww.scatterweb.net<strong>Mobile</strong> phones• voice, data• simple graphical displaysperformancePalmtop• tiny keyboard• simple versionsof standard applicationsDr.-Ing. Jean-Pierre Ebert MC-I SS07 1.12
Effects of device portabilityPower consumption limited computing power, low quality displays, small disks due tolimited battery capacity CPU: power consumption ~ CV 2 fLoss of data C: internal capacity, reduced by integration V: supply voltage, can be reduced to a certain limit f: clock frequency, can be reduced temporally higher probability, has to be included in advance into the design(e.g., defects, theft)Limited user interfaces compromise between size of fingers and portability integration of character/voice recognition, abstract symbolsLimited memory limited value of mass memories with moving parts flash-memory or ? as alternativeDr.-Ing. Jean-Pierre Ebert MC-I SS07 1.13
Page 3 and 4: Administrative Issues Lecture dates
Page 5 and 6: Chapter 1:Introduction A case for m
Page 7 and 8: Mobile communicationTwo aspects of
Page 9 and 10: Mobile and wireless services - Alwa
Page 11: Location dependent servicesLocation
Page 15 and 16: Early history of wireless communica
Page 17 and 18: History of wireless communication I
Page 19 and 20: History of wireless communication I
Page 21 and 22: Wireless systems: Overview of the d
Page 23 and 24: Worldwide wireless subscribers (old
Page 25 and 26: Worldwide cellular subscriber growt
Page 27 and 28: Mobile statistics snapshot (09/2002
Page 29 and 30: Wireless Internet ChallengesAttribu
Page 31 and 32: Influence of mobile communication t

Mobile Communications I - IHP Microelectronics

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