Abstract
With the explosive growth of multitudinous wireless services and high-data-rate required applications, relay aided Device-to-Device (D2D) communications have attracted increasing attentions. In this paper, we investigate the performance trade-off in relay aided D2D-cellular networks, where D2D users reuse the resource of cellular uplink transmissions. To optimize the performance of relay aided D2D communications, we firstly study the trade-off between spectral efficiency (SE) and energy efficiency, and propose a source-relay joint power allocation scheme. The optimal transmit powers for both source and relay users are derived, based on which we further introduce a SE-variation function to explicitly evaluate the impact of enabling D2D communications on D2D-cellular networks. Theoretical analysis and simulation results demonstrate the viability of the proposed scheme and provide comprehensive insights into the coexistence of different systems.
| Original language | English |
|---|---|
| Pages (from-to) | 10144-10149 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Vehicular Technology |
| Volume | 67 |
| Issue number | 10 |
| Early online date | 16 Jul 2018 |
| DOIs | |
| Publication status | Published - Oct 2018 |
Keywords
- Device-to-Device communications
- energy efficiency
- interference constraint
- power allocation
- spectral efficiency
ASJC Scopus subject areas
- Automotive Engineering
- Aerospace Engineering
- Computer Networks and Communications
- Electrical and Electronic Engineering
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