The Spectrum Mobility Challenges Computer Science

Essay add: 13-12-2016, 10:42   /   Views: 20

Spectrum mobility is the process when a DSA user changes its frequency of operations. The target of a user is to capture the best available spectrum or to operate in the best available frequency band.

Spectrum handoff:

In DSA Networks the user changes its frequency of operation for two reasons i.e. when the current channel conditions become worse or a primary user appears. So the spectrum mobility gives rise to the spectrum handoff.

In the spectrum mobility each time DSA user changes its frequency of operation the network protocols are going to shift from one mode of operation to another. The main goal is to make sure that the transitions are made smoothly and as soon as possible such that the applications running on a DSA Network perceive minimum performance degradation. .

Spectrum Mobility Challenges:

At a particular time, several frequency bands may be available, so good algorithms are required to decide the best available spectrum based on the channel characteristics of the available spectrum and the requirements of the applications used by DSA user.

The next challenge is to reduce delay and loss during spectrum handoff when a spectrum is chosen.

Novel algorithms are required for the ensured of less performance degradation during transition.

The spectrum handoff scheme should integrate inter-cell handoff and takes all the possibilities of spectrum handoff into consideration.

As the available channels change over time the quality of service maintenance is challenging.

If a user moves from a place to another, the continuous allocation of spectrum is a major challenge in DSA networks.

Spectrum Sharing:

In [11], spectrum sharing is defined as when two systems accessing the same spectrum the




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