MAC Protocol for Improving Throughput and Balancing Uplink/Downlink Throughput for Wireless Local Area Networks with Long Propagation Delays

Takayuki NISHIO; Kaito FUNABIKI; Masahiro MORIKURA; Koji YAMAMOTO; Daisuke MURAYAMA; Katsuya NAKAHIRA

doi:10.1587/transcom.2016EBP3074

MAC Protocol for Improving Throughput and Balancing Uplink/Downlink Throughput for Wireless Local Area Networks with Long Propagation Delays

Takayuki NISHIO, Kaito FUNABIKI, Masahiro MORIKURA, Koji YAMAMOTO, Daisuke MURAYAMA, Katsuya NAKAHIRA

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Long-distance wireless local area networks (WLANs) are the key enablers of wide-area and low-cost access networks in rural areas. In a WLAN, the long propagation delay between an access point (AP) and stations (STAs) significantly degrades the throughput and creates a throughput imbalance because the delay causes unexpected frame collisions. This paper summarizes the problems caused in the medium access control (MAC) mechanism of the WLAN by a long propagation delay. We propose a MAC protocol for solving the delay-induced throughput degradation and the throughput imbalance between the uplink and the downlink in WLANs to address these problems. In the protocol, the AP extends NAV duration of CTS frame to protect an ACK frame and transmits its data frame to avoid delay induced frame collisions by piggybacking on the ACK frame transmission. We also provide a throughput model for the proposed protocol based on the Bianchi model. A numerical analysis using the proposed throughput model and simulation evaluation demonstrate that the proposed protocol increases the system throughput by 150% compared with that obtained using the conventional method, and the uplink throughput can be increased to the same level as the downlink throughput.

Publication: IEICE TRANSACTIONS on Communications Vol.E100-B No.5 pp.874-883

Publication Date: 2017/05/01

Publicized: 2016/11/25

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2016EBP3074

Type of Manuscript: PAPER

Category: Terrestrial Wireless Communication/Broadcasting Technologies

Authors

Takayuki NISHIO
  Kyoto University
Kaito FUNABIKI
  Kyoto University
Masahiro MORIKURA
  Kyoto University
Koji YAMAMOTO
  Kyoto University
Daisuke MURAYAMA
  NTT Corporation
Katsuya NAKAHIRA
  NTT Corporation

Keyword

wireless local area network (WLAN), long propagation delay, IEEE 802.11, MAC protocol, long-distance WLAN, radio over fiber WLAN, CSMA/CA

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Takayuki NISHIO, Kaito FUNABIKI, Masahiro MORIKURA, Koji YAMAMOTO, Daisuke MURAYAMA, Katsuya NAKAHIRA, "MAC Protocol for Improving Throughput and Balancing Uplink/Downlink Throughput for Wireless Local Area Networks with Long Propagation Delays" in IEICE TRANSACTIONS on Communications, vol. E100-B, no. 5, pp. 874-883, May 2017, doi: 10.1587/transcom.2016EBP3074.
Abstract: Long-distance wireless local area networks (WLANs) are the key enablers of wide-area and low-cost access networks in rural areas. In a WLAN, the long propagation delay between an access point (AP) and stations (STAs) significantly degrades the throughput and creates a throughput imbalance because the delay causes unexpected frame collisions. This paper summarizes the problems caused in the medium access control (MAC) mechanism of the WLAN by a long propagation delay. We propose a MAC protocol for solving the delay-induced throughput degradation and the throughput imbalance between the uplink and the downlink in WLANs to address these problems. In the protocol, the AP extends NAV duration of CTS frame to protect an ACK frame and transmits its data frame to avoid delay induced frame collisions by piggybacking on the ACK frame transmission. We also provide a throughput model for the proposed protocol based on the Bianchi model. A numerical analysis using the proposed throughput model and simulation evaluation demonstrate that the proposed protocol increases the system throughput by 150% compared with that obtained using the conventional method, and the uplink throughput can be increased to the same level as the downlink throughput.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.2016EBP3074/_p

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@ARTICLE{e100-b_5_874,
author={Takayuki NISHIO, Kaito FUNABIKI, Masahiro MORIKURA, Koji YAMAMOTO, Daisuke MURAYAMA, Katsuya NAKAHIRA, },
journal={IEICE TRANSACTIONS on Communications},
title={MAC Protocol for Improving Throughput and Balancing Uplink/Downlink Throughput for Wireless Local Area Networks with Long Propagation Delays},
year={2017},
volume={E100-B},
number={5},
pages={874-883},
abstract={Long-distance wireless local area networks (WLANs) are the key enablers of wide-area and low-cost access networks in rural areas. In a WLAN, the long propagation delay between an access point (AP) and stations (STAs) significantly degrades the throughput and creates a throughput imbalance because the delay causes unexpected frame collisions. This paper summarizes the problems caused in the medium access control (MAC) mechanism of the WLAN by a long propagation delay. We propose a MAC protocol for solving the delay-induced throughput degradation and the throughput imbalance between the uplink and the downlink in WLANs to address these problems. In the protocol, the AP extends NAV duration of CTS frame to protect an ACK frame and transmits its data frame to avoid delay induced frame collisions by piggybacking on the ACK frame transmission. We also provide a throughput model for the proposed protocol based on the Bianchi model. A numerical analysis using the proposed throughput model and simulation evaluation demonstrate that the proposed protocol increases the system throughput by 150% compared with that obtained using the conventional method, and the uplink throughput can be increased to the same level as the downlink throughput.},
keywords={},
doi={10.1587/transcom.2016EBP3074},
ISSN={1745-1345},
month={May},}

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TY - JOUR
TI - MAC Protocol for Improving Throughput and Balancing Uplink/Downlink Throughput for Wireless Local Area Networks with Long Propagation Delays
T2 - IEICE TRANSACTIONS on Communications
SP - 874
EP - 883
AU - Takayuki NISHIO
AU - Kaito FUNABIKI
AU - Masahiro MORIKURA
AU - Koji YAMAMOTO
AU - Daisuke MURAYAMA
AU - Katsuya NAKAHIRA
PY - 2017
DO - 10.1587/transcom.2016EBP3074
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E100-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2017
AB - Long-distance wireless local area networks (WLANs) are the key enablers of wide-area and low-cost access networks in rural areas. In a WLAN, the long propagation delay between an access point (AP) and stations (STAs) significantly degrades the throughput and creates a throughput imbalance because the delay causes unexpected frame collisions. This paper summarizes the problems caused in the medium access control (MAC) mechanism of the WLAN by a long propagation delay. We propose a MAC protocol for solving the delay-induced throughput degradation and the throughput imbalance between the uplink and the downlink in WLANs to address these problems. In the protocol, the AP extends NAV duration of CTS frame to protect an ACK frame and transmits its data frame to avoid delay induced frame collisions by piggybacking on the ACK frame transmission. We also provide a throughput model for the proposed protocol based on the Bianchi model. A numerical analysis using the proposed throughput model and simulation evaluation demonstrate that the proposed protocol increases the system throughput by 150% compared with that obtained using the conventional method, and the uplink throughput can be increased to the same level as the downlink throughput.
ER -