Earticle

초록

영어

In this paper, resource allocation for a relay-based multi-user Orthogonal Frequency-Division Multiple Access (OFDMA) uplink system is studied. All the relays adopt the decode-and-forward protocol and assist the transmission from the source to destination. In current wireless networks, the terminal depends more on battery power. Given that, battery life is limited, prolonging the service life of equipment is a key problem in ensuring the information transmission and in reducing the financial burden of the batteries. We aim to maximize the survival time of the relay system and to reduce the rate of loss. Therefore, we formulate the problem in which the subcarriers select the optimal relay based on both the channel gain and the residual capacity of the relays. We also consider a weighting factor that reflects the residual capacity of different relays. Simulation results show that the proposed algorithms can achieve longer survival time of the relay systems.

목차

Abstract
 1. Introduction
 2. System Model
 3. Problem Formulation
  A. Solution of the Dual Function
  B. Optimal Power Allocation for a Given Relay Assignment
  C. Optimal Relay Selection
 4. Simulation Results
 5. Conclusion
 Acknowledgment
 References

키워드

저자

• Jingran Huang [ School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China ]
• Fang Wang [ School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China ] First author
• Shouyi Yang [ School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Multimedia and Ubiquitous Engineering

• 간기

  월간

• pISSN

  1975-0080

• 수록기간

  2008~2016

• 등재여부

  SCOPUS

• 십진분류

  KDC 505 DDC 605