Title :
Enhanced Scanning Scheme for Delay-Constrained Fast Handoff in IEEE 802.11 WLANs
Author :
Allawi, Yazan M. ; Kim, Min-Gon ; Kang, Minho
Author_Institution :
Opt. Internet Res. Center (OIRC), Inf. & Commun. Univ. (ICU), Daejeon
Abstract :
Since channel scanning time in IEEE 802.11 handoff is dominant in total handoff delay time, attention has to be paid to the reduction of channel scanning time for effectively supporting delay sensitive applications such as voice over IP (VoIP). Therefore, this paper proposes a new channel scanning scheme that adaptively adopts full channel scanning before, and first satisfaction first reservation scanning after a required delay time obtained from the application layer. Simulation results substantiate that the proposed scheme can keep the total handoff delay as low as possible compared to the required delay while maintaining acceptable Received Signal Strength (RSS) to a Mobile Host (MH) and thus the Quality of Service (QoS) of the applications can be more guaranteed than the conventional and previous schemes.
Keywords :
Internet telephony; quality of service; wireless LAN; wireless channels; IEEE 802.11 WLAN; QoS; VoIP; delay-constrained fast handoff; first satisfaction first reservation scanning scheme; full channel scanning scheme; mobile host; quality of service; received signal strength; voice over IP; Cities and towns; Costs; Degradation; Delay effects; Force control; Internet telephony; Media Access Protocol; Quality of service; Streaming media; Wireless LAN;
Conference_Titel :
Performance, Computing and Communications Conference, 2008. IPCCC 2008. IEEE International
Conference_Location :
Austin, Texas
Print_ISBN :
978-1-4244-3368-1
Electronic_ISBN :
1097-2641
DOI :
10.1109/PCCC.2008.4745078
