%0 Book Section %1 Schueler2001517 %A Schüler, J. %A Gruhl, S. %A Schwabe, T. %A Schweigel, M. %B Teletraffic Engineering in the Internet EraProceedings of the International Teletraffic Congress - ITC-I7 %D 2001 %E Jorge Moreira de Souza, Nelson L.S. da Fonseca %E de Souza e Silva, Edmundo A. %I Elsevier %K itc itc17 %P 517 - 528 %R http://dx.doi.org/10.1016/S1388-3437(01)80148-7 %T Performance improvements for \TCP\ in mobile networks with high packet delay variations %V 4 %X Previous \TCP\ performance investigations for wireless systems focus on \TCP\ throughput degradation due to packet loss on the error-prone wireless link. Since cellular mobile networks like \GPRS\ and \UMTS\ include a strong link layer error protection, using adaptive Forward Error Correction and Automatic Repeat Request schemes, a bad quality of the wireless link does not mainly result in \IP\ packet loss but rather in an additional packet delay. Furthermore \TCP\ congestion control has to deal with hand-offs and temporary link layer disconnections in cellular mobile networks leading to a significant packet delay variation and packet disordering. This paper analyzes the performance of \TCP\ in cellular mobile networks, focusing on the packet delay and disordering problem. We find spurious retransmissions and \TCP\ timeouts being a dominant cause for throughput degradation. Finally we propose an algorithm to filter spurious \TCP\ retransmissions at the Base Station to increase \TCP\ performance and increase overall wireless link capacity.

@incollection{Schueler2001517, abstract = {Previous \TCP\ performance investigations for wireless systems focus on \TCP\ throughput degradation due to packet loss on the error-prone wireless link. Since cellular mobile networks like \GPRS\ and \UMTS\ include a strong link layer error protection, using adaptive Forward Error Correction and Automatic Repeat Request schemes, a bad quality of the wireless link does not mainly result in \IP\ packet loss but rather in an additional packet delay. Furthermore \TCP\ congestion control has to deal with hand-offs and temporary link layer disconnections in cellular mobile networks leading to a significant packet delay variation and packet disordering. This paper analyzes the performance of \TCP\ in cellular mobile networks, focusing on the packet delay and disordering problem. We find spurious retransmissions and \TCP\ timeouts being a dominant cause for throughput degradation. Finally we propose an algorithm to filter spurious \TCP\ retransmissions at the Base Station to increase \TCP\ performance and increase overall wireless link capacity. }, added-at = {2016-07-12T14:53:52.000+0200}, author = {Schüler, J. and Gruhl, S. and Schwabe, T. and Schweigel, M.}, biburl = {https://www.bibsonomy.org/bibtex/2e39cc7d9ab42d1399dbaed499782ff77/itc}, booktitle = {Teletraffic Engineering in the Internet EraProceedings of the International Teletraffic Congress - ITC-I7}, doi = {http://dx.doi.org/10.1016/S1388-3437(01)80148-7}, editor = {Jorge Moreira de Souza, Nelson L.S. da Fonseca and de Souza e Silva, Edmundo A.}, interhash = {8994bd2f404d99c3f1703c72ef352332}, intrahash = {e39cc7d9ab42d1399dbaed499782ff77}, issn = {1388-3437}, keywords = {itc itc17}, pages = {517 - 528}, publisher = {Elsevier}, series = {Teletraffic Science and Engineering }, timestamp = {2020-04-30T18:17:29.000+0200}, title = {Performance improvements for \TCP\ in mobile networks with high packet delay variations }, volume = 4, year = 2001 }