Inhalt des Dokuments
Journal Papers
| Citation key | willkomm10efficient_qos_support |
|---|---|
| Author | Willkomm, Daniel and Wolisz, Adam |
| Pages | 16–23 |
| Year | 2010 |
| ISSN | 1536-1284 |
| DOI | 10.1109/MWC.2010.5547917 |
| Journal | IEEE Wireless Communications Magazine |
| Volume | 17 |
| Number | 4 |
| Month | August |
| Abstract | The fundamental condition for the legal approval of Dynamic Spectrum Access (DSA) approaches is the protection of the Primary User (PU). However, for DSA to become an attractive service reality, it is crucial to ensure also some Quality of Service (QoS) support for the Secondary User (SU) communication. In this paper, we discuss sensing based opportunistic spectrum access approaches, in which PU protection is achieved by a properly organized sensing process and SU communication reconfiguration. While the required reliability of the sensing process can be expressed in terms of rarely enough overlooking the PU, we assume that the proper QoS for the SU is given by maintaining — with a given confidence level — a minimum bandwidth availability for the SU in spite of PU dynamics. In this paper we present an overview of approaches which might be used to achieve these objectives. In addition we point out, that both the sensing process and the secondary link maintenance (necessary to keep the required bandwidth in spite of reconfiguration due to detected PUs) require a significant spectrum overhead. We identify and elaborate a fundamental tradeoff in using these overheads in either sensing or link maintenance, and present examples of its optimization. |
| Bibtex Type of Publication | JournalPapersAndBookChapters |