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Related Experiment Video

Updated: Jan 13, 2026

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FBDT: Sum-Throughput Achieving Transport Layer Solution for Multi-RAT Networks.

Suresh Srinivasan1, Sam Shippey1, Ehsan Aryafar1

  • 1Portland State University, Computer Science Department, Portland, OR, USA.

IEEE Transactions on Mobile Computing
|January 7, 2026
PubMed
Summary
This summary is machine-generated.

FBDT, a new transport layer solution, overcomes limitations in multi-radio access technology (RAT) traffic aggregation. It achieves full throughput across multiple RATs, significantly improving mobile application performance.

Keywords:
360-degree Video StreamingACK(s)BackgroundBlockageConversationalFile downloadsForward and Backward Data Transmission (FBDT)Head of the Line (HoL)InteractiveLine of Sight (LoS)Millimeter-waveMobile Augmented and Virtual Reality (AR/VR)Mobile Traffic classMobilityMultiPath Transport Control Protocol (MPTCP)Multiple Radio Access Technology (Multi-RAT)Progressive DownloadsQuality of User Experience (QoE)Re-TransmissionSchedulersSingle Path Transport Control Protocol (SPTCP)Sliding WindowStreamingThroughputTransmission WindowWeb-pageWiFiWiGignon Line of Sight (nLoS)

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Area of Science:

  • Computer Science
  • Wireless Networking
  • Transport Layer Protocols

Background:

  • Emerging mobile applications demand higher bandwidth and lower latency, challenging current wireless systems.
  • Existing multi-Radio Access Technology (RAT) traffic aggregation methods, like multi-path TCP, face Head-of-Line (HoL) blocking and inefficient traffic distribution.

Purpose of the Study:

  • To introduce FBDT, a novel transport layer solution for multi-RAT traffic aggregation.
  • To demonstrate FBDT's ability to achieve the sum of throughput rates across multiple RATs, overcoming dynamic channel conditions.

Main Methods:

  • Implementation of FBDT in the Linux kernel.
  • Evaluation of FBDT's performance in dual-RAT (WiFi and WiGig) and multi-RAT scenarios.
  • Comparative analysis against state-of-the-art multi-path TCP.

Main Results:

  • FBDT achieves 2.5x throughput gain in a dual-RAT scenario with a mobile client.
  • FBDT's throughput scales linearly with the number of RATs, unlike multi-path TCP.
  • Significant improvements observed for file downloads (2-3x faster), video streaming (10x faster, 10 dB higher quality), and mobile VR (9 dB higher viewport quality).

Conclusions:

  • FBDT offers a superior solution for multi-RAT traffic aggregation, addressing key performance bottlenecks.
  • The proposed system significantly enhances user experience for bandwidth-intensive and latency-sensitive mobile applications.
  • FBDT demonstrates robust performance scaling and substantial gains across various traffic classes.