Distribute algorithm for two-hops Device-to-Device communications underlaying cellular networks

• Main Authors: CHEN Zhaoyu, LUO Hanwen
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2015-02-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: D2D; two-hop Decode-and-forward; power control
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/create_pdf.aspx?file_no=201501005&flag=1&year_id=2015&quarter_id=

This paper proposed a power control algorithm for multi-hops device to device communication system under the single cellular networks.Different D2D links communicate by the shared band and users in one D2D links transmit message in two-hop Decode-and-forward mode.D2D users among different links which share the same band in asynchronous mode would get mutual interference.We use a proposal algorithm to approximate the optimistic solution with relaxation factor method,firstly get the closed expression of optimistic power,then we modify the transmission power to decrease the co-channel interference.At last,the simulation results verify the correctness of proposed power control algorithm and the improvement of system sum rate.