2021/07/26 by Syed Waqas Haider Shah, Shah, Syed Waqas Haider, Muhammad Mahboob-ur-Rahman +7
Computer Science · Engineering · #Advanced MIMO Systems Optimization #Cooperative Communication and Network Coding #FOS: Computer and information sciences #FOS: Electrical engineering #Full-Duplex Wireless Communications #Information Theory (cs.IT) #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2107.12217
openalex publication_date 2021/07/26 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
This work does the statistical quality-of-service (QoS) analysis of a\nblock-fading device-to-device (D2D) link in a multi-tier cellular network that\nconsists of a macro-BS (BSMC) and a micro-BS (BSmC) which both operate in\nfull-duplex (FD) mode. For the D2D link under consideration, we first formulate\nthe mode selection problem-whereby D2D pair could either communicate directly,\nor, through the BSmC, or, through the BSMC-as a ternary hypothesis testing\nproblem. Next, to compute the effective capacity (EC) for the given D2D link,\nwe assume that the channel state information (CSI) is not available at the\ntransmit D2D node, and hence, it transmits at a fixed rate r with a fixed\npower. This allows us to model the D2D link as a Markov system with six-states.\nWe consider both overlay and underlay modes for the D2D link. Moreover, to\nimprove the throughput of the D2D link, we assume that the D2D pair utilizes\ntwo special automatic repeat request (ARQ) schemes, i.e., Hybrid-ARQ (HARQ) and\ntruncated HARQ. Furthermore, we consider two distinct queue models at the\ntransmit D2D node, based upon how it responds to the decoding failure at the\nreceive D2D node. Eventually, we provide closed-form expressions for the EC for\nboth HARQ-enabled D2D link and truncated HARQ-enabled D2D link, under both\nqueue models. Noting that the EC looks like a quasi-concave function of r, we\nfurther maximize the EC by searching for an optimal rate via the\ngradient-descent method. Simulation results provide us the following insights:\ni) EC decreases with an increase in the QoS exponent, ii) EC of the D2D link\nimproves when HARQ is employed, iii) EC increases with an increase in the\nquality of self-interference cancellation techniques used at BSmC and BSMC in\nFD mode.\n