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Paper Abstract and Keywords
Presentation 2026-03-03 13:25
Toward High-speed Communication with Fixed-size Buffers and NIC Offloading
Ryo Nakamura (Univ of Tokyo), Ueno Yukito, Akira Nagaoki), Tatsuya Fujiwara (NTT DOCOMO BUSINESS), Yohei Kuga (TOYOTA) SITE2025-78 IA2025-77
Abstract (in Japanese) (See Japanese page) 
(in English) This paper reports a stduy on a novel transport communication mechanism designed to achieve throughput beyond 100 Gbps over long-distance networks while suppressing CPU consumption. As Ethernet link speeds continue to increase beyond 100 Gbps and 400 Gbps, packet-per-packet processing has become a major bottleneck on general-purpose servers, and it is difficult to fully utilize such high-bandwidth links. To address this issue, we propose a new transport communication mechanism in which fixed-length ring buffers are preallocated in main memory for transmitting and receiving data, and the NIC directly reads application data from the TX ring buffer and packetizes it for transmission. We implemented a prototype of the method in software using DPDK and evaluated its throughput. The results show that memory copies for receiving packets are the primary bottleneck in software with existing Ethernet NICs, and that throughput of 400 Gbps is achievable if this bottleneck is mitigated.
Keyword (in Japanese) (See Japanese page) 
(in English) High-speed Data Communication / NIC Offloading / Reliable Transport / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 379, IA2025-77, pp. 9-14, March 2026.
Paper # IA2025-77 
Date of Issue 2026-02-24 (SITE, IA) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF SITE2025-78 IA2025-77

Conference Information
Committee IA SITE IPSJ-IOT  
Conference Date 2026-03-03 - 2026-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Industry Support Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Internet and Information Ethics Education, etc. 
Paper Information
Registration To IA 
Conference Code 2026-03-IA-SITE-IOT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Toward High-speed Communication with Fixed-size Buffers and NIC Offloading 
Sub Title (in English)  
Keyword(1) High-speed Data Communication  
Keyword(2) NIC Offloading  
Keyword(3) Reliable Transport  
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1st Author's Name Ryo Nakamura  
1st Author's Affiliation The University of Tokyo (Univ of Tokyo)
2nd Author's Name Ueno Yukito  
2nd Author's Affiliation NTT DOCOMO BUSINESS, Inc. (NTT DOCOMO BUSINESS)
3rd Author's Name Akira Nagaoki)  
3rd Author's Affiliation NTT DOCOMO BUSINESS, Inc. (NTT DOCOMO BUSINESS)
4th Author's Name Tatsuya Fujiwara  
4th Author's Affiliation NTT DOCOMO BUSINESS, Inc. (NTT DOCOMO BUSINESS)
5th Author's Name Yohei Kuga  
5th Author's Affiliation Toyota Motor Corporation (TOYOTA)
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Speaker Author-1 
Date Time 2026-03-03 13:25:00 
Presentation Time 25 minutes 
Registration for IA 
Paper # SITE2025-78, IA2025-77 
Volume (vol) vol.125 
Number (no) no.378(SITE), no.379(IA) 
Page pp.9-14 
#Pages 6 
Date of Issue 2026-02-24 (SITE, IA) 

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