International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 07 | July 2024
p-ISSN: 2395-0072
www.irjet.net
Managing radio resources in public safety situations based on Deviceto-Device communications within a hybrid multiple access system in 5G Networks. Ghefar Alrefai 1, Yahia Fareed 2, Mohammad Samir Modabbes 3 1 Postgraduate Student (PhD), Communication Engineering department,
Faculty of Electrical and Electronic Engineering, University of Aleppo, Aleppo, Syria 2 Professor, Communication Engineering department, Faculty of Electrical and Electronic Engineering, University of Aleppo, Aleppo, Syria 3 Professor, Communication Engineering department, Faculty of Electrical and Electronic Engineering, University of Aleppo, Aleppo, Syria. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Managing wireless infrastructure is very
wireless networks, especially in the areas of 5G and subsequent cellular systems [2].
essential and crucial after natural disasters such as earthquakes, hurricanes, landslides or man-made disasters such as wars. Rapid information gathering after a disaster helps in achieving effective communication management, as the pressure of users to maintain constant communication with family and friends causes bottlenecks and communication failures for other users. Device-to-device (D2D) communication technology reduces this pressure by relying on the proximity of users, thus increasing the efficiency of spectrum utilization. A many-to-many matching algorithm with an adaptive splitting factor and reuse factor was proposed for two scenarios and the results were evaluated using MATLAB simulation software. The results showed that the proposed algorithm outperforms the recently used GaleShapley matching algorithms in achieving effective management of radio resources in emergency situations, and it also succeeded in improving productivity and serving a larger number of users effectively.
Emergency communications systems are typically designed to transmit information across multiple types of devices, from light signals to text messages to live video streaming, with the goal of creating a unified communications system that aims to improve communications during emergencies. Unlike emergency notification systems, which generally deliver emergency information in one direction, emergency communications systems are typically able to initiate and receive information from multiple parties and a variety of sources and locations, from which the system will disseminate this information to one or more target audiences [1]. The post-disaster areas can be classified into coverage areas and out-of-coverage areas. Cellular users can communicate with each other under the coverage of the base station, while users outside the coverage area resort to multi-hop D2D communications to communicate or within the same coverage area but depending on the close distance between users [3].
Key Words: Mobile, D2D, MILEACH, CH, Disasters, 5G
1.INTRODUCTION
After the recent earthquake disaster in Syria and Turkey, the cellular communications network in the disaster area collapsed, and whether the collapse was partial or complete, it caused delays in emergency response and saved many lives. Social media such as Facebook launched the Safety Check feature, allowing people to update their safety status to families and friends during a disaster [4]. It was noted that on the ground, locals did not have the capacity to collect and sort through the large amounts of information coming in, leading to confusion due to cell phone limitations.
Ensuring continued communications is one of the top priorities after a natural disaster such as an earthquake, hurricane, etc. Governments tend to gather information as quickly as possible at the disaster site, so it is essential to manage the wireless network infrastructure efficiently to help rescue workers or people in the same disaster area communicate with people outside [1]. Communications may be disrupted after a disaster either due to damage or due to the pressure caused by the large number of calls users make to family and friends. Device-to-Device (D2D) communications technology helps reduce the number of calls by taking advantage of the proximity and communicate directly bypassing Evolved Node B (eNB) or Next-Generation Node B (gNodeB), and thus enhances the capabilities of
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D2D communications use millimeter waves (mmWave) frequency band from 3 GHz to 300 GHz, complementing the frequency bands currently in use from 300 MHz to 3 GHz.
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