Bidirectional bandwidth allocation for TCP performance enhancement in mobile WiMAX networks

Eun Chan Park, Jae Young Kim, Hwangnam Kim, Han Seok Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

We propose a virtual bidirectional connection for efficient bandwidth allocation to downlink TCP data and uplink acknowledgment (ACK) in mobile WiMAX networks based on IEEE 802.16. We observed that, in serving a downlink TCP flow, the standard bandwidth-request/allocation mechanism inevitably results in additional delay to transmit uplink TCP ACK, which increases round trip time of downlink TCP flow and decreases its throughput accordingly. To resolve this problem, we propose a hybrid approach combining proactive bandwidth allocation with piggyback bandwidth request. The proposed framework removes the unnecessary bandwidth-request delay, and also decreases signaling overhead involved in the bandwidth-request Simulation results show that this approach significantly increases downlink TCP throughput and uplink bandwidth efficiency.

Original languageEnglish
Title of host publication2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008
DOIs
Publication statusPublished - 2008
Event2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008 - Poznan, Poland
Duration: 2008 Sep 152008 Sep 18

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008
CountryPoland
CityPoznan
Period08/9/1508/9/18

Keywords

  • Bandwidth request & allocation
  • IEEE 802.16e MAC
  • Mobile WiMAX
  • TCP performance

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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