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An Application of Throughput Request Satisfaction Method for Maximizing Concurrent Throughput in WLAN for IoT

Bin Wu1, Nobuo Funabiki1, Sujan Chandra Roy1

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This study enhances throughput fairness in smart home networks using IEEE 802.11n WLANs. A new method maximizes high-priority host throughput while ensuring minimum service for others, addressing interference issues.

Keywords:
Raspberry PiWLANaccess pointhigh-density IoT networkstarget throughputthroughput maximizationtraffic shaping

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Network Engineering

Background:

  • Internet of Things (IoT) devices are increasingly used in smart homes, relying on IEEE 802.11n Wireless Local Area Networks (WLANs).
  • High-density IoT networks face challenges like interference and unequal Received Signal Strength (RSS) from Access Points (APs), leading to throughput unfairness and insufficiency.
  • Existing throughput request satisfaction methods address fairness but do not fully solve the problem of maximizing throughput for specific hosts under interference.

Purpose of the Study:

  • To propose an enhanced throughput request satisfaction method for maximizing the throughput of a high-priority host in concurrent WLAN communications.
  • To ensure that while maximizing the throughput of a priority host, other hosts still receive a minimum acceptable throughput.

Main Methods:

  • The study extends the previous throughput request satisfaction method by recalculating target throughput values.
  • Traffic shaping is applied at the Access Point (AP) to control the actual throughput of hosts.
  • Experiments were conducted using a test-bed system with Raspberry Pi as AP devices in various indoor topologies.

Main Results:

  • The enhanced method effectively increases the actual throughput of the high-priority host.
  • Concurrent communication throughput is maximized for the priority host while minimum throughput is guaranteed for other hosts.
  • Experimental results in different indoor environments confirm the proposed method's effectiveness in addressing throughput insufficiency and unfairness.

Conclusions:

  • The proposed extension of the throughput request satisfaction method successfully maximizes the throughput of a high-priority host in dense IEEE 802.11n WLANs.
  • The method provides a practical solution for improving performance in smart home and other high-density IoT environments.
  • The findings demonstrate a significant improvement in throughput maximization and fairness under concurrent communication scenarios.