191 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Cairo UniversityEG17 papers
- The Ohio State UniversityUS16 papers
- Alexandria UniversityEG13 papers
- American University in CairoEG10 papers
- Qatar UniversityQA9 papers
- Egypt-Japan University of Science and TechnologyEG7 papers
- Ain Shams UniversityEG6 papers
- Goethe University FrankfurtDE5 papers
- Joint Institute for Nuclear ResearchRU5 papers
- Helwan UniversityEG4 papers
- Military Technical CollegeEG4 papers
- Princeton UniversityUS4 papers
31 papers · 1 filter
A Converse Bound for Cache-Aided Interference Networks
Antonious M. Girgis, Ozgur Ercetin, Mohammed Nafie +1
In this paper, an interference network with arbitrary number of transmitters and receivers is studied, where each transmitter is equipped with a finite size cache. We obtain an inf…
Degrees of Freedom in Cached MIMO Relay Networks With Multiple Base Stations
Osama A. Hanna, Amr El-Keyi, Mohammed Nafie
The ability of physical layer relay caching to increase the degrees of freedom (DoF) of a single cell was recently illustrated. In this paper, we extend this result to the case of…
Decentralized Coded Caching in Wireless Networks: Trade-off between Storage and Latency
Antonious M. Girgis, Ozgur Ercetin, Mohammed Nafie +1
This paper studies the decentralized coded caching for a Fog Radio Access Network (F-RAN), whereby two edge-nodes (ENs) connected to a cloud server via fronthaul links with limited…
Cache-Aided Heterogeneous Networks: Coverage and Delay Analysis
Mohamed A. Abd-Elmagid, Ozgur Ercetin, Tamer ElBatt
This paper characterizes the performance of a generic -tier cache-aided heterogeneous network (CHN), in which the base stations (BSs) across tiers differ in terms of their spati…
Optimal Beamforming for MIMO Shared Relaying in Downlink Cellular Networks with ARQ
Ahmed Raafat Hosny, Ramy Abdallah Tannious, Amr El-Keyi
In this paper, we study the performance of the downlink of a cellular network with automatic repeat-request (ARQ) and a half duplex decode-and-forward shared relay. In this system,…
Optimal Energy Allocation For Delay-Constrained Traffic Over Fading Multiple Access Channels
Antonious M. Girgis, Amr El-Keyi, Mohammed Nafie
In this paper, we consider a multiple-access fading channel where users transmit to a single base station (BS) within a limited number of time slots. We assume that each user h…
Proactive Location-Based Scheduling of Delay-Constrained Traffic Over Fading Channels
Antonious M. Girgis, Amr El-Keyi, Mohammed Nafie +1
In this paper, proactive resource allocation based on user location for point-to-point communication over fading channels is introduced, whereby the source must transmit a packet w…
On Optimal Policies in Full-Duplex Wireless Powered Communication Networks
Mohamed A. Abd-Elmagid, Alessandro Biason, Tamer ElBatt +2
The optimal resource allocation scheme in a full-duplex Wireless Powered Communication Network (WPCN) composed of one Access Point (AP) and two wireless devices is analyzed and der…
Optimization of Energy-Constrained Wireless Powered Communication Networks with Heterogeneous Nodes
Mohamed A. Abd-Elmagid, Tamer ElBatt, Karim G. Seddik
In this paper, we study wireless networks where nodes have two energy sources, namely a battery and radio frequency (RF) energy harvesting circuitry. We formulate two optimization…
Achievable Degrees of Freedom on K-user MIMO Multi-way Relay Channel with Common and Private Messages
Mohamed Salah, Amr El-Keyi, Yahya Mohasseb +1
This paper investigates the achievable total degrees of freedom (DoF) of the MIMO multi-way relay channel that consists of K users, where each user is equipped with M antennas, and…
Maximum Throughput Opportunistic Network Coding in Two-Way Relay Networks
Maha Zohdy, Tamer ElBatt, Mohamed Nafie
In this paper, we study Two-way relaying networks well-known for its throughput merits. In particular, we study the fundamental throughput delay trade-off in two-way relaying netwo…
Power-Optimal Feedback-Based Random Spectrum Access for an Energy Harvesting Cognitive User
Mahmoud Ashour, Ahmed El Shafie, Amr Mohamed +1
In this paper, we study and analyze cognitive radio networks in which secondary users (SUs) are equipped with Energy Harvesting (EH) capability. We design a random spectrum sensing…
Using Network Coding to Achieve the Capacity of Deterministic Relay Networks with Relay Messages
Ahmed A. Zewail, Yahya Mohasseb, Mohammed Nafie +1
In this paper, we derive the capacity of the deterministic relay networks with relay messages. We consider a network which consists of five nodes, four of which can only communicat…
The Deterministic Capacity of Relay Networks with Relay Private Messages
Ahmed A. Zewail, Y. Mohasseb, M. Nafie +1
We study the capacity region of a deterministic 4-node network, where 3 nodes can only communicate via the fourth one. However, the fourth node is not merely a relay since it can e…
On the Coexistence of a Primary User with an Energy Harvesting Secondary User: A Case of Cognitive Cooperation
Ahmed El Shafie, Tamer Khattab, Amr El-Keyi +1
In this paper, we consider a cognitive scenario where an energy harvesting secondary user (SU) shares the spectrum with a primary user (PU). The secondary source helps the primary…
Achievable Degrees of Freedom Region of the MIMO Relay Networks using the Detour Schemes
Ahmed A. Zewail, M. Nafie, Y. Mohasseb +1
In this paper, we study the degrees of freedom (DoF) of the MIMO relay networks. We start with a general Y channel, where each user has antennas and aims to exchange messages…
Maximum Secondary Stable Throughput of a Cooperative Secondary Transmitter-Receiver Pair: Protocol Design and Stability Analysis
Ahmed El Shafie, Tamer Khattab, Amr El-Keyi +1
In this paper, we investigate the impact of cooperation between a secondary transmitter-receiver pair and a primary transmitter (PT) on the maximum stable throughput of the primary…
On the Diversity Gain Region of the Z-interference Channels
Mohamed S. Nafea, Karim G. Seddik, Mohammed Nafie +1
In this work, we analyze the diversity gain region (DGR) of the single-antenna Rayleigh fading Z-Interference channel (ZIC). More specifically, we characterize the achievable DGR o…
Distributed Spectrum Sensing with Sequential Ordered Transmissions to a Cognitive Fusion Center
Laila Hesham, Ahmed Sultan, Mohammed Nafie
Cooperative spectrum sensing is a robust strategy that enhances the detection probability of primary licensed users. However, a large number of detectors reporting to a fusion cent…
On Rate-Splitting by a Secondary Link in Multiple Access Primary Network
John Tadrous, Mohammed Nafie
An achievable rate region is obtained for a primary multiple access network coexisting with a secondary link of one transmitter and a corresponding receiver. The rate region depict…
Keys through ARQ: Theory and Practice
Yara Abdallah, Mohamed Abdel Latif, Moustafa Youssef +2
This paper develops a novel framework for sharing secret keys using the Automatic Repeat reQuest (ARQ) protocol. We first characterize the underlying information theoretic limits,…
HyberLoc: Providing Physical Layer Location Privacy in Hybrid Sensor Networks
Rania El-Badry, Ahmed Sultan, Moustafa Youssef
In many hybrid wireless sensor networks' applications, sensor nodes are deployed in hostile environments where trusted and un-trusted nodes co-exist. In anchor-based hybrid network…
Randomization for Security in Half-Duplex Two-Way Gaussian Channels
Aly El Gamal, Moustafa Youssef, Hesham El Gamal
This paper develops a new physical layer framework for secure two-way wireless communication in the presence of a passive eavesdropper, i.e., Eve. Our approach achieves perfect inf…
ARQ Secrecy: From Theory to Practice
Yara Omar, Moustafa Youssef, Hesham El Gamal
Inspired by our earlier work on Automatic Repeat reQuest (ARQ) secrecy, we propose a simple, yet efficient, security overlay protocol to existing 802.11 networks. Our work targets…