B.tech Seminar on NANO SCALE MAGNETO-INDUCTIVE COMM,seminar idea inspired by an IEEE paper
link:http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&arnumber=6810454
2. OVERVIEW
• NANOSCALE COMMUNICATION
• EXISTING COMMUNICATION APPROACHES
• NMI COMMUNICATION
• MODELS OF NMI COMM SYSTEMS
• Point to Point
• Wave guide
• PERFORMANCE EVALUATION
• CONCLUSION
3. INTRODUCTION
• Nanoscale communication between nanodevices is a quite
novel and interdisciplinary concept which includes
nanotechnology,biotechnology, and communication
technology
• A nanonetwork or nanoscale network is a set of
interconnected nanomachines, which are able to perform
only very simple tasks such as computing, data storing,
sensing and actuation.
• Nanonetworks are expected to expand the capabilities of
single nanomachines both in terms of complexity and range
of operation by allowing them to coordinate, share and fuse
information.
4. EXISTING COMMUNICATION
APPROCHES
• Several techniques in the literature are presented for the
realization of the nanoscale communication namely
electromagnetic, acoustic, or molecular communication.
Electromagnetic
• This is defined as the transmission and reception of
electromagnetic radiation from components based on novel
nanomaterials.
Molecular
• Molecular communication is defined as the transmission and
reception of information by means of molecules,such systems use
the presence or absence of a selected type of molecule to digitally
encode messages. The molecules are delivered into
communications media such as air and water for transmission
5. DISADVANTAGES
Using electromagnetic (EM) waves for wireless communication
at nanoscale has several disadvantages
High absorption losses due to molecular absorption
Part of the transmitted EM wave is converted into internal kinetic
enegry of the molecules in the communication medium
Frequency selective characteristics of the channel.
Different molecule types have different resonant frequencies and
the absorption at each resonance spreads over a range of
frequencies, the nanoscale EM communication channel is very
frequency-selective
• Large size antenna is necessary for the efficient propagation of
EM waves.
6. NMI
COMMUNCATION
• Promising alternative method for nanoscale wireless
communication because it solves the problems
associated with the nanoscale EM communication
• magnetic coupling between nanocoils is used for
wireless communication at the nanoscale.
• NMI communication overcomes the high absorption
losses because of molecular absorption.
• NMI communication,the channel conditions depend
on the magnetic permeability of the medium Thus,
having a communication medium with uniform
permeability enables constant channel conditions
7. • the path loss may be higher than the EM
communication
• The advantage of the MI signal lies in its ability to
penetrate through all natural media (air, water,
earth, rock, ice) as well as most man-made
structures.
• the path loss can be reduced by forming a
waveguide structure
• the transmission and reception are accomplished
with the use of small size coil.
• MI is generally unfavorable for terrestrial wireless
communication.
8.
9. PHYSICAL MODELS
POINT to POINT
• Nanoscale Magneto-Inductive (NMI) communication
between a single transmitter nanodevice (TN) and a single
receiver nanodevice (RN).
• The magnetic coupling between the transmitter and receiver
nanocoils establishes the NMI communication channel. The
magnetic coupling between the transmitter and receiver
nanocoils establishes the NMI communication channel.
10.
11. • The equivalent circuit of the NMI communication
model can be derived as shown
• According to the equivalent circuit of the NMI
communicationmodel, the transmitted power, denoted by Pt,
and the receivedpower, denoted by Pr, are given as
12. • Assuming d >>a avg, the path loss expression becomes
13. WAVEGUIDE Model
• To increase the range of the NMI communication, we employ relay
nanonodes between the transmitter and receiver nanocoils to form a
magneto-inductive waveguide.
• For the NMI communication, the relay nanonodes are assumed to be
passive devices; that is, a relay nanonode includes only a nanocoil
and does not have a power source or processing circuitry.
• The signal propagation through the relay nanonodes is achieved by
the magnetic coupling between nanocoils.
• the path loss in the NMI communication waveguide is given by
14.
15. PERFORMANCE EVALUATION
• The path loss, (Pt/Pr),is used as the performance criterion and
evaluated with respect to the communication distance for different
magnetic permeabilities of the magnetic cores in the nanocoils.
• We use MATLAB to perform the performance analysis.
• For the point-to-point NMI communication, the path loss in dB with
respect to the communication distance d for different relative magnetic
permeabilities μr is illustrated
• A decrease in the relative permeability μr increases the path loss
• NMI waveguide communication, the path loss in dB with respect to the
communication distance between transmitterand receiver r for different
relative magnetic permeabilities μr is demonstrated
• for the same communication distances, the waveguide technique greatly
reduces the path loss compared with the point-to-point NMI
communication.
16.
17. CONCLUSION
• The numerical analyses show that using waveguide method in the
NMI communication can significantly reduce the path loss and
increase the achievable communication range of the NMI
communication.
• The problems that EM waves encounter at nanoscale are high
attenuation rates due to high molecular absorption and frequency
selective channel characteristics. The novel NMI communication
overcomes these problems by introducing lowabsorption losses and
flat channel characteristics.
• Using the waveguide NMI communication method solves the high
path loss problem in the NMI communication.
• The NMI communication stands as a promising
alternative wireless nanoscale communication
technique.
