中文

Journal of Applied Sciences ›› 2011, Vol. 29 ›› Issue (4): 331-339.doi: 10.3969/j.issn.0255-8297.2011.04.001

• Communication Engineering •     Next Articles

Multi-objective Optimization of Cross-Layer Resource Allocation in Cooperative Relay Systems

TANG Lun1;2, LONG Ye-hua1, CHEN Qian-bin1, ZENG Xiao-ping2     

  1. 1. Key Laboratory of Mobile Communication Technology, Chongqing University of Posts and
    Telecommunications, Chongqing 400065, China
    2. Communication Engineering College, Chongqing University, Chongqing 400044, China
  • Received:2010-10-14 Revised:2011-01-14 Online:2011-07-30 Published:2011-07-30
  • Supported by:

    国家科技重大专项基金(No.2008ZX03003-005, No.2011ZX03003-003-02)； 国家科技支撑计划基金(No.2008BAH30B10)；国家自然科学基金(No.60972070)；重庆市自然科学基金(No.CSTC2009BA2090)；重庆市教委项目基金(No.KJ100514)；重庆邮电大学博士启动基金(No.A2011-2)；重庆市科委重点实验室专项基金资助

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Abstract:

Joining optimization in reliability, transmission rate and power consumption in the cooperative relay networks is addressed in the paper. Formulas of reliability, transmission rate and power consumption are analyzed, and two optimization models proposed: maximization of network utility model depending on reliability and transmission rate, and minimization of power consumption. To implement compromise among
reliability, transmission rate and power consumption, a cross-layer optimization model is proposed to combine
network utility and power consumption. With the Lagrangian decomposition method, a distributed algorithm
is developed to solve the joining optimization problem. The algorithm can achieve tradeoff between reliability
and transmission rate by changing a factor ?. Further adjustment of the tradeoff factor in the joining optimization
model leads to a tradeoff between network utility and power consumption. Simulation results show
that the proposed algorithm is effective to achieve a tradeoff among reliability, transmission rate and power
consumption.

Key words:  opportunistic cooperative communication, convex optimization, cross-layer design, utility maximization

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