Full-Duplex Communications in Large-Scale Cellular Networks

الموضوعات

علوم تطبيقية وتكنولوجية

الملخص

In-band full-duplex (FD) communications have been optimistically promoted to improve the spectrum utilization and efficiency. However, the penetration of FD communications to the cellular networks domain is challenging due to the imposed uplink/downlink interference. This thesis presents a tractable framework, based on stochastic geometry, to study FD communications in multi-tier cellular networks. Particularly, we assess the FD communications effect on the network performance and quantify the associated gains. The study proves the vulnerability of the uplink to the downlink interference and shows that the improved FD rate gains harvested in the downlink(up to 97%) comes at the expense of a significant degradation in the uplink rate (up to 94%). Therefore, we propose a novel fine-grained duplexing scheme, denoted as α-duplex scheme, which allows a partial overlap between the uplink and the downlink frequency bands. We derive the required conditions to harvest rate gains from the α-duplex scheme and show its superiority to both the FD and half-duplex (HD) schemes. In particular, we show that the α-duplex scheme provides a simultaneous improvement of 28% for the downlink rate and 56% for the uplink rate. We also show that the amount of the overlap can be optimized based on the network design objective.Moreover, backward compatibility is an essential ingredient for the success of new technologies. In the context of in-band FD communication, FD base stations (BSs) should support HD users' equipment (UEs) without sacrificing the foreseen FD gains. The results show that FD-UEs are not necessarily required to harvest rate gains from FD-BSs. In particular, the results show that adding FD-UEs to FD-BSs offers a maximum of 5% rate gain over FD-BSs and HD-UEs case, which is a marginal gain compared to the burden required to implement FD transceivers at the UEs' side. To this end, we shed light on practical scenarios where HD-UEs operation with FD-BSs outperforms the operation when both the BSs and UEs are FD and we find a closedform expression for the critical value of the self-interference cancellation power required for the FD UEs to outperform HD UEs.

روابط وملفات

التعريف والنوع

رقم الوثيقة

0f376348-8129-42cf-94e8-101e414c628c

رقم العقد

0

نوع الوسائط

Crawler

نوع المحتوى

الرسائل العلمية

صيغة المصدر

رسائل ماجيستير

نوع الملف

pdf text

أسماء الملفات

1699938_1.pdf

بيانات النشر

ألقاب المؤلفين

[{"name_ar":"أحمد العموري","title_ar":"اعداد","title_en":"Preparation"},{"name_ar":"محمد سليم علويني","title_ar":"اشراف","title_en":"Supervision"}]

اللغة

English

المصدر والدورية

اسم المصدر

Full-Duplex Communications in Large-Scale Cellular Networks

المحتوى والصفحات

عدد الصفحات

0

كلمات الباحثين

ergodic rate, error probability, Full duplex, half duplex, network topology, outage probability, partial overlap, stochastic geometry

إشراف وإعداد

الإشراف

محمد سليم علويني

الإعداد

أحمد العموري

الاقتباسات الببليوغرافية