DocumentCode :
3211160
Title :
TULIP: A link-level protocol for improving TCP over wireless links
Author :
Parsa, Christina ; Garcia-Luna-Aceves, J.J.
Author_Institution :
Dept. of Comput. Eng., California Univ., Santa Cruz, CA, USA
fYear :
1999
fDate :
1999
Firstpage :
1253
Abstract :
We present the transport unaware link improvement protocol (TULIP), which dramatically improves the performance of TCP over lossy wireless links, without competing with or modifying the transport- or network-layer protocols. TULIP is tailored for the half-duplex radio links available with today´s commercial radios and provides a MAC acceleration feature applicable to collision-avoidance MAC protocols (e.g., IEEE 802.11) to improve throughput. TULIP´s timers rely on a maximum propagation delay over the link, rather than performing a round-trip time estimate of the channel delay. The protocol does not require a base station and keeps no TCP state. TULIP is exceptionally robust when bit error rates are high; it maintains high goodput, i.e., only those packets which are in fact dropped on the wireless link are retransmitted and then only when necessary. The performance of TULIP is compared against the performance of the Snoop protocol (a TCP-aware approach) and TCP without link-level retransmission support. The results of simulation experiments using the actual code of the Snoop protocol show that TULIP achieves higher throughput, lower packet delay, and smaller delay variance
Keywords :
packet radio networks; protocols; radio links; MAC acceleration feature; Snoop protocol; TCP performance improvement; TULIP; collision-avoidance MAC protocols; half-duplex radio links; high throughput; link-level protocol; low packet delay; maximum propagation delay; small delay variance; transport unaware link improvement protocol; wireless links; Acceleration; Delay effects; Delay estimation; Media Access Protocol; Performance loss; Propagation delay; Radio link; Throughput; Transport protocols; Wireless application protocol;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE
Conference_Location :
New Orleans, LA
ISSN :
1525-3511
Print_ISBN :
0-7803-5668-3
Type :
conf
DOI :
10.1109/WCNC.1999.796938
Filename :
796938
Link To Document :
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