Energy Minimization of Multi-Cell Cognitive Capacity Harvesting Networks with Neighbor Resource Sharing

Shijun Lin, Haichuan DIng, Liqun Fu*, Yuguang Fang, Jianghong Shi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

In this paper, we investigate the energy minimization problem for a cognitive capacity harvesting network (CCHN), where secondary users (SUs) without cognitive radio (CR) capability communicate with CR routers via device-to-device (D2D) transmissions, and CR routers connect with base stations (BSs) via CR links. Different from traditional D2D networks that D2D transmissions share the resource of cellular transmissions in the same cell, we consider the scenario that D2D transmissions share the uplink cellular frequency bands (CFBs) of neighbor cells. To ensure that the transmissions from SUs do not affect the transmissions for the cellular users (CUs) in the neighbor cells, an inter-cell handshake process is proposed. We formulate the energy minimization problem for SUs as a mixed integer non-linear programming (MINLP). To solve this problem, we decompose it into two nested subproblems: a transmit power optimization subproblem and a CR router and uplink CFB selection subproblem. For the first subproblem, it is proved to be convex, and thus can be efficiently solved. For the second subproblem, we propose a two-level nested game theoretic approach to finding its solution. Simulation results show that the proposed algorithms can significantly improve the performance. With the help of CR routers/the neighbor resource sharing, the energy consumption for SUs can be saved around 30%-37% on average.

Original languageEnglish
Article number8989983
Pages (from-to)3199-3213
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume19
Issue number5
DOIs
Publication statusPublished - May 2020
Externally publishedYes

Keywords

  • Cognitive capacity harvesting network
  • energy minimization
  • neighbor resource sharing

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Lin, S., DIng, H., Fu, L., Fang, Y., & Shi, J. (2020). Energy Minimization of Multi-Cell Cognitive Capacity Harvesting Networks with Neighbor Resource Sharing. IEEE Transactions on Wireless Communications, 19(5), 3199-3213. Article 8989983. https://doi.org/10.1109/TWC.2020.2971194