Coexistence of VoIP and TCP in wireless multihop networks - [Topics in radio communications]

Kyungtae Kim; Dragos̀ Niculescu; Sangjin Hong

doi:10.1109/MCOM.2009.5116803

Coexistence of VoIP and TCP in wireless multihop networks - [Topics in radio communications]

Kyungtae Kim
, Dragos̀ Niculescu
, Sangjin Hong

Electrical Engineering

NEC Corporation

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

When supporting both voice and TCP in a wireless multihop network, there are two conflicting goals: to protect the VoIP traffic and to completely utilize the remaining capacity for TCP. We investigate the interaction between these two popular categories of traffic and find that many solution approaches, such as enhanced TCP variants, priority queues, bandwidth limitation, and traffic shaping, do not always achieve the coexistence goals. Enhanced TCP variants (Reno, Vegas, C-TCP, CUBIC, Westwood) generally fail to protect VoIP in wired-wireless multihop scenarios. Priority schemes, including those built into the 802.11 MAC such as RTS/CTS or 802.11e, do not account for the interference nature of wireless multihop. Finally, bandwidth shaping and window control are valid tools to control TCP, but come with their own trade-offs.

Original language	English
Pages (from-to)	75-81
Number of pages	7
Journal	IEEE Communications Magazine
Volume	47
Issue number	6
DOIs	https://doi.org/10.1109/MCOM.2009.5116803
State	Published - 2009

Keywords

Bandwidth
Delay
Interference
Internet
Logic gates
Spread spectrum communication
Wireless communication

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10.1109/MCOM.2009.5116803

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abstract = "When supporting both voice and TCP in a wireless multihop network, there are two conflicting goals: to protect the VoIP traffic and to completely utilize the remaining capacity for TCP. We investigate the interaction between these two popular categories of traffic and find that many solution approaches, such as enhanced TCP variants, priority queues, bandwidth limitation, and traffic shaping, do not always achieve the coexistence goals. Enhanced TCP variants (Reno, Vegas, C-TCP, CUBIC, Westwood) generally fail to protect VoIP in wired-wireless multihop scenarios. Priority schemes, including those built into the 802.11 MAC such as RTS/CTS or 802.11e, do not account for the interference nature of wireless multihop. Finally, bandwidth shaping and window control are valid tools to control TCP, but come with their own trade-offs.",

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AB - When supporting both voice and TCP in a wireless multihop network, there are two conflicting goals: to protect the VoIP traffic and to completely utilize the remaining capacity for TCP. We investigate the interaction between these two popular categories of traffic and find that many solution approaches, such as enhanced TCP variants, priority queues, bandwidth limitation, and traffic shaping, do not always achieve the coexistence goals. Enhanced TCP variants (Reno, Vegas, C-TCP, CUBIC, Westwood) generally fail to protect VoIP in wired-wireless multihop scenarios. Priority schemes, including those built into the 802.11 MAC such as RTS/CTS or 802.11e, do not account for the interference nature of wireless multihop. Finally, bandwidth shaping and window control are valid tools to control TCP, but come with their own trade-offs.

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Coexistence of VoIP and TCP in wireless multihop networks - [Topics in radio communications]

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Keywords

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