scholarly journals Using LTE-Sim in New Hanover Decision Algorithm for 2-Tier Macrocell-Femtocell LTE Network

2020 ◽  
Vol 9 (4) ◽  
Author(s):  
Umar Danjuma Maiwada ◽  
Aminu Aminu Muazu ◽  
Izaddeen Kabi Yakasai
Keyword(s):  
Mobility Management ◽  
Signal Strength ◽  
Research Area ◽  
Received Signal Strength ◽  
User Equipment ◽  
Base Stations ◽  
Decision Algorithm ◽  
Handover Decision ◽  
Access Policy ◽  
Decision Algorithms

Deployment of mini macrocell base stations can also be referred to as femtocells improve quality of service of indoor and outdoor users. Nevertheless, mobility management remains a key issue with regards to their deployment. This paper is leaned towards this issue, with in-depth focus on the most important aspect of mobility management - handover. In handover management, making a handover decision in the LTE two-tier macrocell femtocell network is a crucial research area. Decision algorithms in this research, are classified and comparatively analyzed according to received signal strength, user equipment speed, cost function and interference. However, it was observed that most of the discussed decision algorithms fail to consider cell selection with hybrid access policy in a single macrocell multiple femtocell scenario, another observation was a majority of these algorithms lack the incorporation of user equipment residence parameter. Not including this parameter boosts the number of unnecessary handover occurrence. To deal with these issues, a sophisticated handover decision algorithm is proposed. The proposed algorithm considers the user’s velocity, received signal strength, residence time as well as the femtocell base station’s access policy. Simulation results have shown that the proposed algorithm reduces the number of unnecessary handovers when compared to conventional received signal strength based handover decision algorithm.

scholarly journals Investigation of a New Handover Approach in LTE and WiMAX

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Mohammad Nour Hindia ◽  
Ahmed Wasif Reza ◽  
Kamarul Ariffin Noordin
Keyword(s):  
Mobile Station ◽  
Signal Strength ◽  
Received Signal Strength ◽  
Base Station ◽  
Multiple Criteria ◽  
Base Stations ◽  
Technology Selection ◽  
The Novel ◽  
Vertical Handovers ◽  
Minimum Number

Nowadays, one of the most important challenges in heterogeneous networks is the connection consistency between the mobile station and the base stations. Furthermore, along the roaming process between the mobile station and the base station, the system performance degrades significantly due to the interferences from neighboring base stations, handovers to inaccurate base station and inappropriate technology selection. In this paper, several algorithms are proposed to improve mobile station performance and seamless mobility across the long-term evolution (LTE) and Worldwide Interoperability for Microwave Access (WiMAX) technologies, along with a minimum number of redundant handovers. Firstly, the enhanced global positioning system (GPS) and the novel received signal strength (RSS) prediction approaches are suggested to predict the target base station accurately. Then, the multiple criteria with two thresholds algorithm is proposed to prioritize the selection between LTE and WiMAX as the target technology. In addition, this study also covers the intercell and cochannel interference reduction by adjusting the frequency reuse ratio 3 (FRR3) to work with LTE and WiMAX. The obtained results demonstrate high next base station prediction efficiency and high accuracy for both horizontal and vertical handovers. Moreover, the received signal strength is kept at levels higher than the threshold, while maintaining low connection cost and delay within acceptable levels. In order to highlight the combination of the proposed algorithms’ performance, it is compared with the existing RSS and multiple criteria handover decision algorithms.

GSM-Based Positioning Technique Using Relative Received Signal Strength

2013 ◽  
Vol 4 (4) ◽  
pp. 38-51 ◽  
Author(s):  
Mohamed H. Abdel Meniem ◽  
Ahmed M. Hamad ◽  
Eman Shaaban
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Correlation Method ◽  
Signal Strength ◽  
Research Problem ◽  
Received Signal Strength ◽  
Base Station ◽  
Velocity Estimation ◽  
Base Stations ◽  
Important Research Problem

Context-aware applications have been gaining huge interest in the last few years. With cell phones becoming ubiquitous computing devices, cell phone localization has become an important research problem. Database Correlation Method (DCM) is a positioning technology that based on a database of a premeasured location dependent variable such as Received Signal Strength (RSS). DCM has shown superior in terms of accuracy. Absolute RSS values received from a base station change with time, but the relative RSS (RRSS) values which refer to the relations of the RSS values between different base stations are more stable. This study proposes and implements a robust RRSS GSM-based technique for both positioning and traffic estimation. The study was tested and analyzed in Egypt roads using realistic data and Android smart phones. The performance evaluation showed good results. Mean positioning accuracy was about 29m in urban areas and velocity estimation was about 1 km/h in rural areas.

scholarly journals Vertical Handover Decision Algorithm Based On Several Specifications in Heterogeneous Wireless Networks

2019 ◽  
Vol 8 (9) ◽  
pp. 977-982
Keyword(s):  
Wireless Networks ◽  
Heterogeneous Wireless Networks ◽  
Signal Strength ◽  
Vertical Handover ◽  
Vertical Handoff ◽  
Heterogeneous Wireless Network ◽  
Generation System ◽  
Decision Algorithm ◽  
Handover Decision ◽  
Choice Procedure

Vertical handoff takes place when a mobile incurable button from one network to one more (e.g., from WLAN to CDMA 1xRTT). The purpose of this paper is to establish the problems under which vertical handoff need to be done. The trouble is developed as a Markov choice procedure. A web link benefit feature and also a signaling price feature are presented to record the tradeoff in between the network sources made use of by the link and also the signaling as well as handling tons sustained on the network. Commonly, a mobile phone might be transferred to attain the procedures of vertical handover, thinking about just one standard, that is, the received signal strength (RSS). Making use of a solitary requirement might trigger solution disruption, an out of balance network lots, and also an ineffective vertical handover. In this paper, we recommend boosted vertical handover decision algorithm based upon several standards in the heterogeneous wireless network. As well as additionally In this paper, we research regarding 5th generation system.

KAJIAN KEKUATAN SINYAL RADIO (RSSI) XBEE DALAM RANGKA PEMASANGAN LANDSLIDE EARLY WARNING SYSTEM (LEWS) DI KABUPATEN GARUT, TASIKMALAYA DAN MAJALENGKA

2019 ◽  
Vol 3 (2) ◽  
pp. 88
Author(s):  
Riski Fitriani
Keyword(s):  
Early Warning ◽  
Early Warning System ◽  
Warning System ◽  
Signal Strength ◽  
Received Signal Strength ◽  
Received Signal Strength Indicator ◽  
Landslide Early Warning ◽  
Point To Point

Salah satu inovasi untuk menanggulangi longsor adalah dengan melakukan pemasangan Landslide Early Warning System (LEWS). Media transmisi data dari LEWS yang dikembangkan menggunakan sinyal radio Xbee. Sehingga sebelum dilakukan pemasangan LEWS, perlu dilakukan kajian kekuatan sinyal tersebut di lokasi yang akan terpasang yaitu Garut, Tasikmalaya, dan Majalengka. Kajian dilakukan menggunakan 2 jenis Xbee yaitu Xbee Pro S2B 2,4 GHz dan Xbee Pro S5 868 MHz. Setelah dilakukan kajian, Xbee 2,4 GHz tidak dapat digunakan di lokasi pengujian Garut dan Majalengka karena jarak modul induk dan anak cukup jauh serta terlalu banyak obstacle. Topologi yang digunakan yaitu topologi pair/point to point, dengan mengukur nilai RSSI menggunakan software XCTU. Semakin kecil nilai Received Signal Strength Indicator (RSSI) dari nilai receive sensitivity Xbee maka kualitas sinyal semakin baik. Pengukuran dilakukan dengan meninggikan antena Xbee dengan beberapa variasi ketinggian untuk mendapatkan kualitas sinyal yang lebih baik. Hasilnya diperoleh beberapa rekomendasi tinggi minimal antena Xbee yang terpasang di tiap lokasi modul anak pada 3 kabupaten.

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