A MODEL OF COMBINED LIMITED BURST RETRANSMISSION AND DEFLECTION ROUTING IN OPTICAL SWITCHING NETWORK

Nguyen Hong Quoc * , Duong Phuoc Dat , Le Nguyen Tan Lan , Tran Tran and Nguyen Thi Hong Luyen

* Corresponding author: (nguyenhongquoc@dhsphue.edu.vn)

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Received: Nov 21, 2021
Revised: Nov 28, 2021
Accepted: Nov 29, 2021
Published: Apr 20, 2022
Title: A MODEL OF COMBINED LIMITED BURST RETRANSMISSION AND DEFLECTION ROUTING IN OPTICAL SWITCHING NETWORK
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How to Cite
Quốc, N. H., Đạt, D. P., Lân, L. N. T., Nhã, T. T., & Luyến, N. T. H. (2022). A MODEL OF COMBINED LIMITED BURST RETRANSMISSION AND DEFLECTION ROUTING IN OPTICAL SWITCHING NETWORK . Journal of Science and Education, 63(03). Retrieved from https://tckhgd.dhsphue.edu.vn/index.php/jse/article/view/351
Issue
Vol. 63 No. 03 (2022): Journal of Science: Natural Science Issue
Section
Journal of Science and Education: Natural Science - Technology

Abstract

Optical Burst Switched Network is considered a promising future of optical switching technology. With the feature of no optical buffer at the intermediate nodes, one of the important problems to be solved in the OBS network is to reduce dropped bursts when resource contention occurs. Especially, when the network's load traffic is high, contention will often occur. Currently, there are many methods to resolve burst contention have been proposed such as: using wavelength conversion, using optical delay path FDL, deflection routing or beam retransmission. In which, deflection routing and burst retransmission are two methods that are being studied. These two methods do not change the network system; and can take advantage of free resources on other output ports and . However, uncontrolled beam retransmission or deflection routing can increase the number of traffic flows, increase end-to-end delay, increase contention due to rerouting, or bursts can be duplicated. term. In this study, we propose a solution combining burst retransmission and limited deflection routing to increase resource utilization efficiency, reduce burst loss probability and reduce end-to-end delay.
Keywords: Diversion routing, burst retransmission, congestion resolution, OBS, network

Tóm tắt

Mạng chuyển mạch chùm quang (OBS) được xem công nghệ chuyển mạch quang hứa hẹn trong tương lai. Nhưng do không có bộ đệm quang tại các nút trung gian vì vậy một trong những vấn đề quan trọng trong mạng OBS là làm sao giảm các chùm bị rơi khi có sự tranh chấp tài nguyên. Đặc biệt, khi lưu lượng tải của mạng cao việc tranh chấp sẽ xảy ra thường xuyên. Hiện nay có nhiều phương pháp giải quyết tranh chấp chùm đã được đề xuất như: sử dụng chuyển đổi bước sóng, sử dụng đường trễ quang FDL, định tuyến lệch hướng hoặc truyền lại chùm. Trong đó định tuyến lệch hướng hoặc truyền lại chùm là hai phương pháp không làm thay đổi hệ thống mạng, có thể tận dụng tài nguyên rỗi trên kết nối ra khác và đang được nghiên cứu rộng rãi hiện nay. Tuy nhiên việc truyền lại chùm hoặc định tuyến lệch hướng không kiểm soát có thể dẫn đến việc tăng số luồng dữ liệu lưu thông, tăng độ trễ truyền thông đầu cuối, tình trạng tranh chấp tăng lên cho các tuyến đường lệch hướng hay các chùm có thể bị lặp vô hạn. Trong nghiên cứu này chúng tôi đề xuất một giải pháp kết hợp giữa truyền lại chùm và định tuyến lệch hướng có giới hạn nhằm tăng hiệu suất sử dụng tài nguyên, giảm xác suất mất chùm và giảm độ trễ truyền thông đầu cuối.
Từ khóa: Định tuyến lệch hướng, truyền lại chùm, giải quyết tắc nghẽn, mạng OBS

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