Sangho Shin and Henning Schulzrinne
Call Admission Control in IEEE 802.11 WLANs using QP-CAT accepted in INFOCOM 2008, April
Sangho Shin and Henning Schulzrinne
Experimental measurement of the capacity for VoIP traffic in IEEE 802.11 Wireless Networks [pdf] INFOCOM 2007, May, Anchorage, Alaska
Sangho Shin, Andrea G. Forte and Henning Schulzrinne
Passive Duplicated Address Detection (pDAD) [pdf] Globecom 2006
Andrea Forte, Sangho Shin and Henning Schulzrinne
Fast Layer-3 Handoff in IEEE 802.11 Wireless Networks [pdf] International Wireless Internet Conference (WICON 2006)
Sangho Shin, Andrea Forte and Henning Schulzrinne
Seamless Layer-2 Handoff in IEEE 802.11 Wireless Networks using Two Radios[pdf] Tech Report
Sangho Shin and Henning Schulzrinne
Balancing uplink and downlink delay of VoIP traffic in IEEE 802.11 Wireless Networks using Adaptive Priority Control (APC)[pdf] International Conference on Quality of Service in Heterogeneous Wired/Wireless Networks (QShine 2006)
Takehiro Kawata, Sangho Shin, Andrea Forte and Henning
Schulzrinne. Improving The Capacity for VoIP Traffic in IEEE 802.11
Networks with Dynamic PCF[pdf] IEEE WCNC 2005
[Abstract]
With the fast deployment of IEEE 802.11 networks, the
support of real-time traffic with stringent Quality of Ser-
vice (QoS) requirements on these networks becomes a crit-
ical point. In this paper we propose a new PCF scheme,
namely Dynamic Point Coordination Function (DPCF). We
will show how, with our new scheme we can improve the to-
tal throughput of up to 20% in IEEE 802.11b networks. We
will show how we can also achieve a drastic improvement
on the average End-to-End delay which is kept well below
100 ms in heavily loaded traffic conditions with an average
value well under 50 ms in normal traffic conditions
Sangho Shin, Andrea Forte, Anshuman Rawat and Henning Schulzrinne. Reducing MAC Layer Handoff Latency in IEEE 802.11 Wireless LANs[click here] a proceeding of ACM MobiWAC, 2004
[Abstract]
With the growth of IEEE 802.11-based wireless LANs, VoIP
and similar applications are now commonly used over wire-
less networks. Mobile station performs a handoff whenever
it moves out of the range of one access point (AP) and tries
to connect to a differerent one. This takes a few hundred
milliseconds, causing interruptions in VoIP sessions. We de-
veloped a new handoff procedure which reduces the MAC
layer handoff latency, in most cases, to a level where VoIP
communication becomes seamless. This new handoff proce-
dure reduces the discovery phase using a selective scanning
algorithm and a caching mechanism.
Publications under review
Andrea G. Forte, Sangho Shin and Henning Schulzrinne
IEEE 802.11 in the Large: Observation at the IETF Meeting Submitted to a conference
Takehiro Kawata, Sangho Shin, Andrea Forte and Henning
Schulzrinne. Improving The Capacity for VoIP Traffic in IEEE 802.11
Networks with Dynamic PCF Submitted to an IEICE journal
Sangho Shin and Henning Schulzrinne. Experimental Measurement of VoIP cCpacity in IEEE 802.11 WLANs Submitted to the Transaction of IEEE Transaction of Mobile Computing.