Optimal resource allocation for sensing-based spectrum sharing D2D networks. (May 2015)

• Record Type: Journal Article
• Authors: Chen, Hao; Liu, Lingjia; Matyjas, John D.; Medley, Michael J.
• Is Part Of: Computers & electrical engineering. Volume 44(2015)
• Page Start: 107
• Page End: 121
• Publication Date: 2015-05
• Subjects: Sensing based spectrum sharing D2D -- Power allocation -- Partially observable Markov decision process -- Spectrum sensing; Computer engineering -- Periodicals; Electrical engineering -- Periodicals; Electrical engineering -- Data processing -- Periodicals; Ordinateurs -- Conception et construction -- Périodiques; Électrotechnique -- Périodiques; Électrotechnique -- Informatique -- Périodiques; Computer engineering; Electrical engineering; Electrical engineering -- Data processing; Periodicals; Electronic journals; 621.302854
• DOI: 10.1016/j.compeleceng.2014.12.013
• Languages: English
• ISSNs: 0045-7906

Abstract

Abstract: To improve the spectral efficiency of a cellular network, sensing based spectrum sharing device-to-device (sensing-based D2D) technique is introduced in this paper. To be specific, efficient algorithms are introduced to find the optimal sensing time and power allocation for single-subband sensing-based D2D systems under cellular link's rate loss constraint. For multi-subband systems, D2D users may have limited sensing capability where only a part of the subbands can be sensed. Accordingly, a partially observable Markov decision process (POMDP) model is introduced and an efficient algorithm is introduced to address the resource allocation problem. Simulation results suggest that sensing-based D2D outperforms overlay D2D when the transmitter of D2D link is far away from the receiver of cellular link in the single-subband single-subcarrier case. In the single-subband multi-subcarrier case, sensing-based D2D can achieve 15.2% increase in spectral-efficiency over overlay D2D. In the multi-subband case, when D2D users have limited sensing capability, our proposed Separate Principle method can further improve D2D link's spectral-efficiency by 5 % ∼ 15 % compared to the Greedy algorithm.