A distributed power control and mode selection algorithm for D2D communications

Abstract

Device-to-device (D2D) communications underlaying a cellular infrastructure has recently been proposed as a means of increasing the resource utilization, improving the user throughput and extending the battery lifetime of user equipments. In this article we propose a new distributed power control algorithm that iteratively determines the signal-to-noise-and-interference-ratio (SINR) targets in a mixed cellular and D2D environment and allocates transmit powers such that the overall power consumption is minimized subject to a sum-rate constraint. The performance of the distributed power control algorithm is benchmarked with respect to the optimal SINR target setting that we obtain using the Augmented Lagrangian Penalty Function method. The proposed scheme shows consistently near optimum performance both in a single-input-multiple-output and a multiple-input-multiple-output setting. We also propose a joint power control and mode selection algorithm that requires single cell information only and clearly outperforms the classical cellular mode operation.

Energy Efficiency Comparison between Co-located and Distributed Antenna Systems with D2D Communication

“…where R is the sum capacity of the systems, which R is equal to (6) when the systems without adding D2D communication, otherwise it can be expressed as (9). total P is equal to (10) when discussing the realistic power consumption model, otherwise total P is equal to (11).…”

Energy efficiency and sum rate tradeoffs for massive MIMO systems with underlaid device-to-device communications

“…The study [17] compared different multiantenna transmission schemes. In [18,19], two power control schemes were proposed for a multi-cell MIMO network. In [20], the ergodic capacity for a scenario with only one CUE and one D2D user is derived and cases of high and low SNR as well as high number of antennas in the downlink have been studied.…”

“…There are a few works in the D2D communication literature where the base stations have multiple antennas [16][17][18][19][20]. In [16], uplink MU-MIMO with one D2D pair was considered.…”

Performance Comparison of Practical Resource Allocation Schemes for Device‐to‐Device Communications

“…As it was pointed out by several related works, D2D communications utilizing cellular spectrum pose new challenges, because, relative to cellular communication scenarios, the system needs to cope with new interference situations [4][5][6][7][8][9]. For example, in an orthogonal frequency division multiplexing (OFDM) system in which user equipment (UE) uses D2D communications, the D2D links may reuse some of the OFDM time-frequency physical resource blocks (PRB).…”

“…(1) Mode selection (MS): MS algorithms determine whether D2D candidates in the proximity of each other should communicate in direct mode using the D2D link or in cellular mode via the BS [9,[16][17][18]. [10,[19][20][21]).…”