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| Titel: |
On the Minimization of Handover Decision Instability in Wireless Local Area Networks |
| Auteur: |
Meriem Abid Tara Ali Yahiya Guy Pujolle |
| Verschenen in: |
International journal of computer networks & communications |
| Paginering: | Jaargang 2 (2010) nr. 3 pagina's 38-50 |
| Jaar: |
2010 |
| Inhoud: |
This paper addresses handover decision instability which impacts negatively on both user perception andnetwork performances. To this aim, a new technique called The HandOver Decision STAbility Technique(HODSTAT) is proposed for horizontal handover in Wireless Local Area Networks (WLAN) based onIEEE 802.11standard. HODSTAT is based on a hysteresis margin analysis that, combined with a utilitybasedfunction, evaluates the need for the handover and determines if the handover is needed or avoided.Indeed, if a Mobile Terminal (MT) only transiently hands over to a better network, the gain from usingthis new network may be diminished by the handover overhead and short usage duration. The approachthat we adopt throughout this article aims at reducing the minimum handover occurrence that leads tothe interruption of network connectivity (this is due to the nature of handover in WLAN which is a breakbefore make which causes additional delay and packet loss). To this end, MT rather performs a handoveronly if the connectivity of the current network is threatened or if the performance of a neighboringnetwork is really better comparing the current one with a hysteresis margin. This hysteresis should makea tradeoff between handover occurrence and the necessity to change the current network of attachment.Our extensive simulation results show that our proposed algorithm outperforms other decision stabilityapproaches for handover decision algorithm. |
| Uitgever: |
Academy & Industry Research Collaboration Center (AIRCC) (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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