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In this document topics covered which are Mobile Computer, Mobile computer - How?, Wireless characteristics, What is Mobility, Mobility Characteristics, Mobility.
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Option for connectivity An easy option (^) Use cellular mobile phone network to connect to some Internet Service Provider and hence to internet. (^) What you need - cellular phone/ corresponding modem. (^) Not a good option for campus wide mobile network. (^) Dependent on the mobile telephone network operator (^) Cheaper wireless LAN options available Other extreme of mobile computer Mobile computing device (^) Acts as a terminal (^) Have wireless connectivity to the network (^) Whatever command or application you run is executed on a remote server. (^) Mobile computing device acts as remote terminal. Issues in mobile computing networks (^) Nature of medium (^) Mobility (^) Portability
(^) Mobility means different things to different people. Some people are quite happy being able to get around town. Others view the world in terms of time distance-Obviously, range of motion is an important aspect of mobility. (^) Another factor in mobility is ease of access. What might be considered mobile in one context is quite immobile in another. (^) A more pertinent example of mobility is the ever decreasing size of cellular telephones. What was once considered a "mobile phone" had to be transported in a vehicle. This continuing decrease in size and weight of handsets has greatly increased the mobility of cellular subscribers. (^) We define mobility as the ability to send and receive communications anytime anywhere. Mobility means that both source and destination devices, applications and people are free of the constraints imposed by physical location.
(^) Resource constraints (^) Mobile computers are resource poor (^) Reduce program size – interpret script languages (Mobile Java?) (^) Computation and communication load cannot be distributed equally (^) Small screen sizes (^) Asymmetry between static and mobile computers (^) Battery power restrictions (^) transmit/receive, disk spinning, display, CPUs, memory consume power (^) Battery lifetime will see very small increase (^) need energy efficient hardware (CPUs, memory) and system software (^) planned disconnections - doze mode (^) Power consumption vs. resource utilization