Acta Metallurgica Sinica(English letters) ›› 2013, Vol. 20 ›› Issue (6): 9-17.doi: 10.1016/S1005-8885(13)60102-8

• Wireless • Previous Articles     Next Articles

Optimal and constant power allocation for joint transmission in HetNet


  1. 1. ICN&SEC Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. Research Department of Wireless Networks, HUAWEI TECHNOLOGIES CO., LTD., Beijing 100095, China
  • Received:2013-04-09 Revised:2013-08-15 Online:2013-12-31 Published:2013-12-27
  • Contact: Yu-jie XU
  • Supported by:

    This work was supported by the HuaWei Innovation Research Project (YJCB2011060WL).


This paper investigates the power allocation issues for joint transmission in heterogeneous network (HetNet), which is characterized by severe cross-tier interference. The optimization problem of maximizing the HetNet throughput is formulated. The original problem turns out to be a non-convex problem, the global optima of which cannot be obtained by conventional optimization methods. This paper develops a novel method to achieve the global optima by turning the original problem into quasi-convex problem. In addition, this paper considers a constant power allocation scheme, as a tradeoff between the system throughput and computational complexity. Based on duality gap theory, the bound of constant power allocation scheme is mathematically derived. Numerical results under different system parameters indicate that both the proposed schemes outperform conventional interference coordination schemes.

Key words:

HetNet, joint transmission, interference coordination, optimal power allocation, constant power allocation, quasi-convex

CLC Number: