Abstract
Mobile IP has been designed to support host mobility over the Internet. In this paper, we show that in most cases the smooth handoff by the route optimization of the Mobile IP standard cannot prevent degradation of TCP performance in events of handoffs, although it was originally intended to reduce the number of packets dropped during a handoff. We also show that in utilizing the route optimization extension, the TCP performance sometimes becomes worse even than the case of the base Mobile IP, if its smooth handoff fails to avoid losses of four or more packets during a handoff. To resolve such problems without sacrificing the scalability in Mobile IP based networks, we propose a buffering of packets at a Base Station (BS). We modify the route optimization extension in order to support packet buffering at the BS, which only requires minor changes. Finally, we discuss some problems occurring when recovering the packets dropped during a handoff by the buffering method, and propose our solution. The proposed buffering method makes handoffs be transparent to transport layer protocols by recovering lost packets during a handoff.
| Original language | English |
|---|---|
| Pages (from-to) | 635-646 |
| Number of pages | 12 |
| Journal | Computer Communications |
| Volume | 25 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2002 May 1 |
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Keywords
- Handoff
- Mobile IP
- Packet buffering
- TCP
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering
Cite this
Improving TCP handoff performance in Mobile IP based networks. / Eom, Doo-Seop; Lee, HeyungSub S.; Sugano, Masashi; Murata, Masayuki; Miyahara, Hideo.
In: Computer Communications, Vol. 25, No. 7, 01.05.2002, p. 635-646.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Improving TCP handoff performance in Mobile IP based networks
AU - Eom, Doo-Seop
AU - Lee, HeyungSub S.
AU - Sugano, Masashi
AU - Murata, Masayuki
AU - Miyahara, Hideo
PY - 2002/5/1
Y1 - 2002/5/1
N2 - Mobile IP has been designed to support host mobility over the Internet. In this paper, we show that in most cases the smooth handoff by the route optimization of the Mobile IP standard cannot prevent degradation of TCP performance in events of handoffs, although it was originally intended to reduce the number of packets dropped during a handoff. We also show that in utilizing the route optimization extension, the TCP performance sometimes becomes worse even than the case of the base Mobile IP, if its smooth handoff fails to avoid losses of four or more packets during a handoff. To resolve such problems without sacrificing the scalability in Mobile IP based networks, we propose a buffering of packets at a Base Station (BS). We modify the route optimization extension in order to support packet buffering at the BS, which only requires minor changes. Finally, we discuss some problems occurring when recovering the packets dropped during a handoff by the buffering method, and propose our solution. The proposed buffering method makes handoffs be transparent to transport layer protocols by recovering lost packets during a handoff.
AB - Mobile IP has been designed to support host mobility over the Internet. In this paper, we show that in most cases the smooth handoff by the route optimization of the Mobile IP standard cannot prevent degradation of TCP performance in events of handoffs, although it was originally intended to reduce the number of packets dropped during a handoff. We also show that in utilizing the route optimization extension, the TCP performance sometimes becomes worse even than the case of the base Mobile IP, if its smooth handoff fails to avoid losses of four or more packets during a handoff. To resolve such problems without sacrificing the scalability in Mobile IP based networks, we propose a buffering of packets at a Base Station (BS). We modify the route optimization extension in order to support packet buffering at the BS, which only requires minor changes. Finally, we discuss some problems occurring when recovering the packets dropped during a handoff by the buffering method, and propose our solution. The proposed buffering method makes handoffs be transparent to transport layer protocols by recovering lost packets during a handoff.
KW - Handoff
KW - Mobile IP
KW - Packet buffering
KW - TCP
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U2 - 10.1016/S0140-3664(01)00394-2
DO - 10.1016/S0140-3664(01)00394-2
M3 - Article
VL - 25
SP - 635
EP - 646
JO - Computer Communications
JF - Computer Communications
SN - 0140-3664
IS - 7
ER -