Definition
Wireless
personal area networks (PANs) allow proximal devices to share information and
resources. The mobile nature of these devices places unique requirements on
PANs, such as low power consumption, frequent make-and-break connections,
resource discovery and utilization, and international regulations.
This
paper examines wireless technologies appropriate for PANs and reviews promising
research in resource discovery and service utilization. We recognize the need
for PDAs to be as manageable as mobile phones and also the restrictive screen
area and input area in mobile phone. Thus the need for a new breed of computing
devices to fit the bill for a PAN. The above devices become especially relevant
for mobile users such as surgeons and jet plane mechanics who need both hands
free and thus would need to have "wearable" computers.
This
paper first examines the technology used for wireless communication. Putting a
radio in a digital device provides physical connectivity;however,to make the
device useful in a larger context a networking infrastructure is required. The infrastructure
allows devices o share data,applications,and resources such as printers, mass
storage, and computation power. Defining a radio standard is a tractable
problem as demonstrated by the solutions presented in this paper.
Designing a network
infrastructure is much more complex
The
second half of the paper describes several research projects that try to
address components of the networking infrastructure. Finally there are the
questions that go beyond the scope of this paper, yet will have he greatest
effect on the direction,capabilities,and future of this paradigm. Will these
networking strategies be incompatible, like he various cellular phone systems
in the United States, or will there be a standard upon which manufacturers and
developers agree, like the GSM (global system for mobile communication)cellular
phones in Europe?
Communication
demands compatibility, which is challenging in a heterogeneous marketplace. Yet
by establishing and implementing compatible systems, manufacturers can offer
more powerful and useful devices to their customers. Since these are, after
all, digital devices living in a programmed digital world, compatibility and
interoperation are possible.
Technologies Explored
1.
Electric field- use human body as a current conduit.
2.Magnetic
field-use base station technology for picocells of space.
3.Infra
Red- Basic issues including opaque body obstruction.
Also must meet international standards by a
compatible protocol.
a.
UHF Radio.
b.
Super regenerative receiver
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