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SSPRD: A Shared-Storage-Based Hardware Packet Reordering and Deduplication System for Multipath Transmission in Wide

Jiandong Ma1,2, Zhichuan Guo1,2, Mangu Song1,3

  • 1National Network New Media Engineering Research Center, Institute of Acoustics, Chinese Academy of Sciences, No. 21, North Fourth Ring Road, Haidian District, Beijing 100190, China.

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Summary

Software-Defined Wide Area Networks (SD-WAN) solutions cause out-of-order packets. SSPRD, a Field-Programmable Gate Array (FPGA) system, efficiently reorders and deduplicates packets, improving network performance.

Keywords:
FPGAWANmultipath transmissionpacket reordering

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Area of Science:

  • Computer Science
  • Network Engineering
  • Hardware Acceleration

Background:

  • Wide Area Networks (WANs) increasingly use multipath and redundant transmissions for higher bandwidth and reduced packet loss.
  • These techniques, common in Software-Defined Wide Area Networks (SD-WAN), lead to out-of-order and duplicate packets at the destination.
  • Significant hardware packet buffer depth is necessary to manage varying WAN path delays and restore data streams.

Purpose of the Study:

  • To propose a novel hardware-based system for efficient packet reordering and deduplication.
  • To address the challenge of managing out-of-order and duplicate packets in SD-WAN environments.
  • To reduce the buffer space requirements for packet processing in high-speed networks.

Main Methods:

  • Introduced SSPRD, a shared-storage system utilizing a Field-Programmable Gate Array (FPGA) for packet reordering and deduplication.
  • Implemented dynamic allocation of shared storage space for packets and sub-buffers across all sessions.
  • Developed a sub-buffer-based timeout event handling algorithm for efficient data stream restoration.

Main Results:

  • SSPRD provides a deep hardware reorder buffer, supporting up to 15,360 packets per session for four concurrent sessions.
  • Achieved a 62.5% reduction in buffer space usage compared to existing solutions.
  • Demonstrated high-performance packet reordering and deduplication at 10 Gbps for 1500-byte packets.

Conclusions:

  • SSPRD offers an effective hardware solution for managing packet reordering and deduplication challenges in SD-WAN.
  • The shared-storage architecture significantly optimizes buffer space utilization.
  • The system achieves high throughput, making it suitable for demanding network applications.