Loch, Adrian ; Nitsche, Thomas ; Kuehne, Alexander ; Hollick, Matthias ; Widmer, Joerg ; Klein, Anja (2014)
Practical Interference Alignment in the Frequency
Domain for OFDM-based Wireless Access Networks.
15th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks. Sydney, Australia (19.06.2014-19.06.2014)
doi: 10.1109/WoWMoM.2014.6918922
Konferenzveröffentlichung, Bibliographie
Kurzbeschreibung (Abstract)
Interference alignment (IA) is often considered in the spatial domain in combination with MIMO systems. In contrast, aligning interference in the frequency domain among multiple subcarriers can also benefit single-antenna OFDM-based access networks. It allows for flexible operation on a per-subcarrier basis. We investigate the gains achievable by frequency IA in practice for a scenario with multiple access points and clients. Previous work is predominantly theoretical and focuses on idealized cases where all nodes have the same average signal-to-noise ratio (SNR). On the contrary, in practical networks, nodes typically have heterogeneous SNRs depending on channel conditions, which might have a significant impact on IA performance. We tackle this problem by designing mechanisms that adaptively choose which nodes shall perform IA on which subcarriers depending on current channel conditions. We implement and validate our approach on software-defined radios. To the best of our knowledge, this is the first practical implementation of IA in the frequency domain. Our measurements show that (1) frequency IA is feasible in practice, and (2) choosing appropriate nodes and subcarriers overcomes the main limitations due to heterogeneous SNRs. Our mechanisms enable IA in scenarios where it would be infeasible otherwise, achieving throughput gains close to the 33% theoretical maximum.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Loch, Adrian ; Nitsche, Thomas ; Kuehne, Alexander ; Hollick, Matthias ; Widmer, Joerg ; Klein, Anja |
| Art des Eintrags: | Bibliographie |
| Titel: | Practical Interference Alignment in the Frequency Domain for OFDM-based Wireless Access Networks |
| Sprache: | Englisch |
| Publikationsjahr: | 9 Oktober 2014 |
| Verlag: | IEEE |
| Buchtitel: | Proceeding of IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks 2014 |
| Veranstaltungstitel: | 15th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks |
| Veranstaltungsort: | Sydney, Australia |
| Veranstaltungsdatum: | 19.06.2014-19.06.2014 |
| DOI: | 10.1109/WoWMoM.2014.6918922 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | Interference alignment (IA) is often considered in the spatial domain in combination with MIMO systems. In contrast, aligning interference in the frequency domain among multiple subcarriers can also benefit single-antenna OFDM-based access networks. It allows for flexible operation on a per-subcarrier basis. We investigate the gains achievable by frequency IA in practice for a scenario with multiple access points and clients. Previous work is predominantly theoretical and focuses on idealized cases where all nodes have the same average signal-to-noise ratio (SNR). On the contrary, in practical networks, nodes typically have heterogeneous SNRs depending on channel conditions, which might have a significant impact on IA performance. We tackle this problem by designing mechanisms that adaptively choose which nodes shall perform IA on which subcarriers depending on current channel conditions. We implement and validate our approach on software-defined radios. To the best of our knowledge, this is the first practical implementation of IA in the frequency domain. Our measurements show that (1) frequency IA is feasible in practice, and (2) choosing appropriate nodes and subcarriers overcomes the main limitations due to heterogeneous SNRs. Our mechanisms enable IA in scenarios where it would be infeasible otherwise, achieving throughput gains close to the 33% theoretical maximum. |
| ID-Nummer: | MAKI-2014-005 |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Nachrichtentechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Nachrichtentechnik > Kommunikationstechnik 20 Fachbereich Informatik 20 Fachbereich Informatik > Sichere Mobile Netze DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche LOEWE LOEWE > LOEWE-Zentren LOEWE > LOEWE-Zentren > CASED – Center for Advanced Security Research Darmstadt DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1053: MAKI – Multi-Mechanismen-Adaption für das künftige Internet DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1053: MAKI – Multi-Mechanismen-Adaption für das künftige Internet > C: Kommunikationsmechanismen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1053: MAKI – Multi-Mechanismen-Adaption für das künftige Internet > C: Kommunikationsmechanismen > Teilprojekt C1 : Netzzentrische Sicht |
| Hinterlegungsdatum: | 18 Aug 2014 09:29 |
| Letzte Änderung: | 23 Aug 2021 09:38 |
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