Energy-efficient resource allocation in heterogeneous networks with cell range expansion

Energy-efficient resource allocation in heterogeneous networks with cell range expansion

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Networks — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

Cell range expansion (CRE) has emerged as a promising technique to improve spectral and energy efficiency (EE) in heterogeneous networks (HetNets). In this study, a resource allocation (RA) problem for maximising the EE is formulated with the considerations on CRE and cross-tier interference coordination (CTIC). Owing to the forms of the objective function and the constraints, the optimisation problem is non-convex and intractable. To solve this problem efficiently, we convert the original problem into an equivalent problem. Then, an efficient iterative algorithm is proposed, where the closed-form expressions of power and resource block allocations are derived by Lagrange dual decomposition method in each iteration. It has been revealed that the proposed iterative algorithm converges to the energy-efficient RA solutions. Compared with the algorithm without CTIC, the simulation results present that the proposed algorithm can achieve the EE gains by 70 percents when the number of the expanded-range users is large and the quality of service requirement is high.


    1. 1)
    2. 2)
    3. 3)
    4. 4)
      • 4. Li, Y., Peng, M., Manzoor, A., Wang, C.: ‘Co-channel interference in two-tier heterogeneous networks: analytical model and ergodic capacity’. Transactions on Emerging Telecommunications Technologies, February 2014.
    5. 5)
    6. 6)
    7. 7)
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
    18. 18)
    19. 19)
    20. 20)
    21. 21)
    22. 22)
    23. 23)
      • 23. Boyd, S., Vandenberghe, L.: ‘Convex Optimization’ (Cambridge University Press, 2004).
    24. 24)
      • 24. Imran, M.A., Katranaras, E.: ‘Energy efficiency analysis of the reference systems, areas of improvements and target breakdown’, public deliverable D2.3 of EARTH, January 2012, available:
    25. 25)

Related content

This is a required field
Please enter a valid email address