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IoT를 고려한 SDN에서 QoS 기반 플로우 핸드오버 관리 방법

Flow Handover Management Scheme based on QoS in SDN Considering IoT

  • 경연웅 (한신대학교 컴퓨터공학부) ;
  • 김태국 (동명대학교 정보통신소프트웨어학과)
  • Kyung, Yeun-Woong (Division of Computer Engineering, Hanshin University) ;
  • Kim, Tae-Kook (Department of Information, Communications & Software Engineering, Tongmyong University)
  • 투고 : 2020.02.20
  • 심사 : 2020.03.23
  • 발행 : 2020.06.30

초록

본 논문은 SDN에서 QoS 특성을 고려한 차등적인 플로우 핸드오버 관리 방법을 제안하고자 한다. IoT 등 기존 네트워크와는 상이한 서비스들이 등장하고 있는 상황에서 기존의 네트워크는 일반적으로 플로우의 특성을 고려하지 않고 단일적인 핸드오버 방법을 제공하였다. 인터넷에서는 IP 연속성을 유지하면서 최소한의 QoS를 보장할 수 있는 핸드 오버 방법들이 현실적으로 제공되고 있고, 4G, 5G 등 모바일 네트워크에서는 QoS 특성을 고려하지 않고 모든 플로우들에 대해 엄격하게 QoS를 보장하여 핸드오버 방법이 제공되고 있다. 이에 따라 QoS 요구사항이 높은 플로우는 인터넷 상황에서 엄격한 QoS 요구사항을 만족시키면서 서비스 연속성이 보장되기 어렵고, 모바일 네트워크에서는 QoS 요구사항이 낮은 플로우와 높은 플로우의 구분이 없이 엄격한 핸드오버 방법이 제공되기 때문에 자원의 비효율적인 사용이 문제로 제시되고 있다. 본 논문에서는 SDN에서 SDN 컨트롤러에 제어 하에 QoS 요구사항에 따라 효율적인 네트워크 운영을 지원하기 위하여 각 flow 특성에 맞는 핸드오버 방법을 제공하고자 한다. 제안하는 방법은 네트워크 운영자 입장에서 효율적인 네트워크 자원 활용을 도모하고 동시에 플로우의 QoS 요구사항을 만족시키고자 한다.

In this paper, we propose a QoS-based handover management scheme in SDN. Even though there have been lots of recent services such as IoT, the conventional networks provide a monolitic handover method without considerations on flow-specific QoS features. For example, the conventional Internet provides a handover method which only considers IP continuity. On the other hand, 4G and 5G networks use a strict handover method for all kinds of flows with resource reservations. This means that it is difficult to guarantee the QoS requirements for the flow with a strict QoS requirement in Internet and the inefficient resource utilization can occur in the 4G and 5G because of the strict QoS-based handover management. The proposed scheme proposes the flow handover management scheme based on QoS requirements according to the SDN controller's management. From the network operators' perspective, the proposed scheme can provide the efficient resource utilization as well as QoS provisioning.

키워드

참고문헌

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