Efficiency Analysis of Burst Transmissions with Block ACK in Contention-Based 802.11e WLANs

Ilenia Tinnirello, Sunghyun Choi

Risultato della ricerca: Other

79 Citazioni (Scopus)

Abstract

The channel utilization efficiency of the standard 802.11 networks is severely compromised when high data transmission rates are employed since physical layer headers and control frames are transmitted at low rate, thus wasting more channel time proportionally. The extensions defined in the emerging 802.11e for quality-of-service (QoS) provisioning include some new mechanisms developed in order to improve the efficiency. Those include data transmission bursting (referred to as TXOP operation) and acknowledgment aggregation (referred to as block ACK). These two features allow to offer new data transmission services, in which the data delivery and acknowledgment unit is not a single frame, but a block of frames. In this paper, we evaluate the performance of these operations for both basic and RTS/CTS access cases. We quantify how the data bursting and block ACK mechanisms can affect the system efficiency for different environments, and derive the maximum achievable throughput. We also discuss the operating conditions at which the switch from a channel utilization method to another is desired.
Lingua originaleEnglish
Pagine3455-3460
Numero di pagine6
Stato di pubblicazionePublished - 2005

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Wireless local area networks (WLAN)
Data communication systems
Quality of service
Agglomeration
Switches
Throughput

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Cita questo

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AB - The channel utilization efficiency of the standard 802.11 networks is severely compromised when high data transmission rates are employed since physical layer headers and control frames are transmitted at low rate, thus wasting more channel time proportionally. The extensions defined in the emerging 802.11e for quality-of-service (QoS) provisioning include some new mechanisms developed in order to improve the efficiency. Those include data transmission bursting (referred to as TXOP operation) and acknowledgment aggregation (referred to as block ACK). These two features allow to offer new data transmission services, in which the data delivery and acknowledgment unit is not a single frame, but a block of frames. In this paper, we evaluate the performance of these operations for both basic and RTS/CTS access cases. We quantify how the data bursting and block ACK mechanisms can affect the system efficiency for different environments, and derive the maximum achievable throughput. We also discuss the operating conditions at which the switch from a channel utilization method to another is desired.

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