Exact(22)
However, the traditional spectrum allocation policy is static and leads to spectrum congestion.
For high-quality channels, the traditional spectrum access scheme is sufficiently good.
Most of traditional spectrum access strategies are based on competitive mechanism or centralized scheduling.
Fixed spectrum allocation is a traditional spectrum allocation methodology for wireless communication systems.
Such non-Gaussian makes the common Gaussian assumption not valid for traditional spectrum sensing [3].
The two traditional spectrum usages result in disparate amounts of spectrum and cross-tier interferences.
Similar(37)
Figures 2 and 3 show that, unlike the traditional spectrum-efficient algorithm which developed under specific input assumption, the GAMIO algorithm considers the specific input signal distribution and achieves the best performance under various input assumption.
This preemptive mechanism is the same as the traditional spectrum-sharing mechanism in sensing-based CRNs [2 5], which has the basic requirement that the PUs are not affected by the SUs' opportunistic spectrum utilization.
However, the traditional static spectrum allocation policy leads to severe spectrum underutilization and spectrum shortage problems.
In the traditional periodical spectrum sensing, the duration of a spectrum hole, D i, which can be regarded as a random variable, as in [16], follows an exponential distribution with an assumed mean μ.
Hence, it was concluded that the traditional fixed spectrum allocation approach cannot efficiently regulate the spectrum access any longer.
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