Earticle

초록

영어

As a solution to spectrum under-utilization problem, Cognitive radio (CR) introduces a dynamic spectrum access technology. In the area, one of the most important problems is how secondary users (SUs) should choose between the available channels, which means how to achieve load balancing between channels. We consider spectrum load balancing problem for CR system in frequency domain and especially in time domain. Our objective is to balance the load among the channels and balance the occupied time length of slots for a fixed channel dynamically in order to obtain a user-optimal solution. In frequency domain, we refer to Dynamic Noncooperative Scheme with Communication (DNCOOPC) used in distributed system and a distributed Dynamic Spectrum Load Balancing algorithm (DSLB) is formed based on DNCOOPC. In time domain, Spectrum Load Balancing method with QoS support is proposed based on Dynamic Feed Back theory and Hash Table (SLBDH). The performance of DSLB and SLBDH are evaluated. In frequency domain, DSLB is more efficient compared with existing Compare_And_Balance (CAB) algorithm and gets more throughput compared with Spectrum Load Balancing (SLB) algorithm. Also, DSLB is a fair scheme for all devices. In time domain, SLBDH is an efficient and precise solution compared with Spectrum Load Smoothing (SLS) method.

목차

Abstract
 I. Introduction
 II. System Model
 III. DSLB and SLBDH algorithms
 IV. SIMULATION
 V. Conclusions
 References

키워드

저자

• Juan Chen [ 인하대학교 정보통신대학원 WiTLAB 석사과정 ] 교신저자
• 손성환 [ Sung-Hwan Sohn | 인하대학교 정보통신대학원 WiTLAB 박사과정 ] 공저자
• Junrong Gu [ 인하대학교 정보통신대학원 WiTLAB 박사과정 ] 공저자
• 김재명 [ Jae-Moung Kim | 인하대학교 정보통신대학원 WiTLAB 교수 ] 공저자

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국ITS학회논문지 [The Journal of The Korean Society of Intelligent Transport Systems]

• 간기

  격월간

• pISSN

  1738-0774

• eISSN

  2384-1729

• 수록기간

  2003~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 326 DDC 338