이기종 무선망의 통합 자원관리를 위한 효율적인 네트워크 선택과 버티컬 핸드오버 알고리즘 = Efficient Network Selection and Vertical Handover Algorithms for Common Radio Resource Management of Heterogeneous Wireless Networks

국문 초록 (Abstract)

다중 인터페이스를 가지는 단말들이 다양한 이기종 무선 네트워크 서비스를 사용할 때 사용자의 버티컬 핸드오버가 증가하게 되었고, 이로 인한 네트워크 자원의 통합적인 관리 문제가 대두되고 있다. 이는 이기종 네트워크에서 자원의 통합 관리(Common Radio Resource Management: CRRM)를 통해 효율적으로 해결 될 수 있다. 본 논문에서는 새로운 사용자가 네트워크에 진입할 때 사용자의 요구 사항을 만족하는 네트워크를 선택하는 Integrated Network Selection 알고리즘과 가용자원이 부족하여 새로운 사용자의 요청을 처리할 수 없을 때 기존 사용자를 주변의 네트워크로 버티컬 핸드오버하여 가용자원을 확보하는 Integrated Vertical Handover 알고리즘을 제안하였고, 그 우수성을 시뮬레이션을 통해 검증하였다.

다국어 초록 (Multilingual Abstract)

Various terminals equipped with multiple interfaces may receive services from wireless networks when they pass through the overlaid heterogeneous networks, and thus the vertical handovers across the wireless networks increases, which will become a big problem in the network resource management. This problem can be efficiently solved by common radio resource management (CRRM). In this paper, we propose two operation algorithms based on network selection jointly with vertical handover as the key CRRM strategies. When a new user tries to get services, the CRRM can choose the best target network according to the proposed Integrated Network Selection Algorithm. When the network cannot satisfy the request from the new users, the proposed Integrated Vertical Handover Algorithm moves existing users to neighborhood networks to accommodate new users. The performance of the proposed algorithms has been validated through extensive simulations.

목차 (Table of Contents)

• 요약
• Abstract
• 1. 서론
• 2. 관련 연구
• 3. 제안하는 CRRM 알고리즘
• 4. 성능 분석
• 5. 결론
• 참고문헌

참고문헌 (Reference)

1 J. McNair, "Vertical Handoffs in Fourth- Generation Multinetwork Environments" 2004

2 C.-S. Lee, "Realization of the Next- Generation Network" 2005

3 Miguel López-Benítez, "QoS provisioning in beyond 3G heterogeneous wireless systems through common radio resource management algorithms" 2006

4 J. Péerez-Romero, "Policy-based Initial RAT Selection Algorithms in Heterogeneous Networks" 1-5, 2005

5 Alexey Baraev, "Performance Evaluation of Radio Access Selection Procedures in Multi-Radio Access Systems" WPMC 2005

6 A. Tolli, "Performance Evaluation of Common Radio Resource Management (CRRM)" 3429-3433, 2002

7 A.L. Wilson, "Optimising Wireless Access Network Selection to Maintain QoS in Heterogeneous Wireless Environments" 2005

8 Gelabert, X., "On Managing Multiple Radio Access Congestion Events in B3G Scenarios" IEEE 2007

9 J. Péerez-Romero, "Network Controlled Cell Breathing in Multi-sevice Heterogeneous CDMA/TDMA scenarios" 2006

10 "NGMC Forum"

11 K. Murray, "Intelligent Access and Mobility Management in Heterogeneous Wireless Networks Using Policy" 181-186, 2003

12 A.-E. M. Taha, "Exploiting Vertical Handoffs in Next Generation Vertical Handoffs" 2006

13 J. Pterez-Romerot, "Common Radio Resource Management: Functional Models and Implementation Requirements" Indoor and Mobile Radio Communications 2005

14 ETRI, "Broadband Mobile Communications towards a Converged World" 2004

15 W-T Chen, "An Adaptive Scheme for Vertical Handoff in Wireless Overlay Networks" 541-548, 2004

16 A. Tolli, "Adaptive Load Balancing Between Multiple Cell Layers" 1691-1695, 2002

17 F.Casadevall, "A Policy based QoS architecture for heterogeneous wirelsss systems" 2005