11-08-2012, 10:39 AM
Mobile Computing
PCS-history.pdf (Size: 291.62 KB / Downloads: 86)
What is Mobile Computing?
Mobile computing is the discipline for creating an information management platform, which is free from spatial and temporal constraints. The freedom from these constraints allows its users to access and process desired information from anywhere in the space. The state of the user, static or mobile, does not affect the information management capability of the mobile platform. A user can continue to access and manipulate desired data while traveling on plane, in car, on ship, etc. Thus, the discipline creates an illusion that the desired data and sufficient processing power are available on the spot, where as in reality they may be located far away.
The discipline of mobile computing has its origin in Personal Communications Services (PCS). PCS refers to a wide variety of wireless access and personal mobility services provided through a small terminal (e.g., cell phone), with the goal of enabling communications at any time, at any place, and in any form. PCS are connected to Public Switched Telephone Network (PSTN) to provide access to wired telephones. PCS include high-tier digital cellular systems for widespread vehicular and pedestrian services and low-tier telecommunication system standards for residential, business, and public cordless access applications.
Mobile connectivity:
The mobile connectivity between two nodes exists if they are continuously connected through wireless channel, and can utilize the channel without being subjected to spatial and temporal constraints.
Figure 1 illustrates the concept of a fully connected information space created through mobile connectivity mode where every unit can communicate to any other unit through wireless channel. The power of mobile connectivity has been recognized by the research community and also by the market. To fully exploit its inherent power the following challenges must be met:
1. Revising the technical architecture: Mobile users are demanding. They are important to the business world. To provide complete connectivity among users the current communication technology must be revised to incorporate mobile connectivity. Additionally, application and data architectures must also be revised to support the demands put upon them by the mobile connectivity.
2. Reliability, coverage, capacity, and cost: At present wireless network is less reliable, have less geographic coverage and reduced bandwidth, are slower, and cost more than the wired-line network services. It is important to find ways to use this new resource more efficiently by designing innovative applications.
3. Integration with legacy mainframe and emerging client/server applications: Application development paradigms are changing. As a result of the IT industry's original focus on mainframes, a huge inventory of applications using communications interfaces that are basically incompatible with mobile connectivity have been accumulated. Still the application development trend is geared towards wired network.
PCS-history.pdf (Size: 291.62 KB / Downloads: 86)
What is Mobile Computing?
Mobile computing is the discipline for creating an information management platform, which is free from spatial and temporal constraints. The freedom from these constraints allows its users to access and process desired information from anywhere in the space. The state of the user, static or mobile, does not affect the information management capability of the mobile platform. A user can continue to access and manipulate desired data while traveling on plane, in car, on ship, etc. Thus, the discipline creates an illusion that the desired data and sufficient processing power are available on the spot, where as in reality they may be located far away.
The discipline of mobile computing has its origin in Personal Communications Services (PCS). PCS refers to a wide variety of wireless access and personal mobility services provided through a small terminal (e.g., cell phone), with the goal of enabling communications at any time, at any place, and in any form. PCS are connected to Public Switched Telephone Network (PSTN) to provide access to wired telephones. PCS include high-tier digital cellular systems for widespread vehicular and pedestrian services and low-tier telecommunication system standards for residential, business, and public cordless access applications.
Mobile connectivity:
The mobile connectivity between two nodes exists if they are continuously connected through wireless channel, and can utilize the channel without being subjected to spatial and temporal constraints.
Figure 1 illustrates the concept of a fully connected information space created through mobile connectivity mode where every unit can communicate to any other unit through wireless channel. The power of mobile connectivity has been recognized by the research community and also by the market. To fully exploit its inherent power the following challenges must be met:
1. Revising the technical architecture: Mobile users are demanding. They are important to the business world. To provide complete connectivity among users the current communication technology must be revised to incorporate mobile connectivity. Additionally, application and data architectures must also be revised to support the demands put upon them by the mobile connectivity.
2. Reliability, coverage, capacity, and cost: At present wireless network is less reliable, have less geographic coverage and reduced bandwidth, are slower, and cost more than the wired-line network services. It is important to find ways to use this new resource more efficiently by designing innovative applications.
3. Integration with legacy mainframe and emerging client/server applications: Application development paradigms are changing. As a result of the IT industry's original focus on mainframes, a huge inventory of applications using communications interfaces that are basically incompatible with mobile connectivity have been accumulated. Still the application development trend is geared towards wired network.