Site diversity in land-mobile cellular telephony network with discontinuous voice transmission

1991 ◽  
Vol 2 (5) ◽  
pp. 471-479 ◽  
Author(s):  
Jean-Paul M. G. Linnartz
Keyword(s):  
Voice Transmission ◽  
Mobile Cellular ◽  
Cellular Telephony ◽  
Site Diversity

Mobile Cellular Telephony

2019 ◽  
pp. 257-281
Author(s):  
Marcelo S. Alencar ◽  
Valdemar C. da Rocha
Keyword(s):  
Mobile Cellular ◽  
Cellular Telephony

scholarly journals Creation of a virtual learning environment to support presential discipline in a technological course

2021 ◽  
Vol 10 (2) ◽  
pp. e41110212727
Author(s):  
Carlos Gomes Fontinelle ◽  
Laura Michaella Batista Ribeiro ◽  
Vitor Bremgartner da Frota ◽  
Daniel Nascimento-e-Silva
Keyword(s):  
Learning Environment ◽  
Teaching And Learning ◽  
Learning Experience ◽  
Virtual Learning ◽  
Learning Objects ◽  
Virtual Learning Environment ◽  
Technological Education ◽  
Mobile Cellular ◽  
Cellular Telephony ◽  
Almost All

This study developed a virtual learning environment to support face-to-face teaching of the subject of Mobile Cellular Telephony of a federal institution of professional and technological education that operates in Northern Brazil. The methodology used consisted of quantitative-qualitative research, of a technological nature, developed in seven stages: 1) installation of the XAMPP and Moodle software, 2) configuration of the teaching environment, 3) allocation of the Moodle platform, 4) use of virtual resources interactive, 5) production of learning objects, 6) measurement of environmental performance indicators and 7) analysis and generation of results. The results showed that a) this was the first virtual learning experience for almost all participating students and teachers interviewed, b) teachers and students were motivated to use virtual environments in their teaching and learning activities, since c) the environment proved to be highly efficient and effective in generating effective learning and d) almost all students carried out the evaluation questions without much difficulty, as usually happens with traditional classes. The conclusion was that a discipline planned from the Moodle platform's perspective has several advantages, such as optimizing study time and the dynamics of classes.

QoS aware Multi-Path Routing using Link Scheduling Algorithm

2019 ◽  
Vol 09 ◽  
Author(s):  
Satyasrikanth Palle ◽  
Shivashankar
Keyword(s):  
Cellular Networks ◽  
Scheduling Algorithm ◽  
Research Work ◽  
Scheduling Algorithms ◽  
Turnaround Time ◽  
Link Scheduling ◽  
Spatial Reuse ◽  
Mobile Cellular ◽  
Simulation Results ◽  
End To End

Objective: The demand for Cellular based multimedia services is growing day by day, in order to fulfill such demand the present day cellular networks needs to be upgraded to support excessive capacity calls along with high data accessibility. Analysis of traffic and huge network size could become very challenging issue for the network operators for scheduling the available bandwidth between different users. In the proposed work a novel QoS Aware Multi Path scheduling algorithm for smooth CAC in wireless mobile networks. The performance of the proposed algorithm is assessed and compared with existing scheduling algorithms. The simulation results show that the proposed algorithm outperforms existing CAC algorithms in terms of throughput and delay. The CAC algorithm with scheduling increases end-to-end throughput and decreases end-to-end delay. Methods: The key idea to implement the proposed research work is to adopt spatial reuse concept of wireless sensor networks to mobile cellular networks. Spatial reusability enhances channel reuse when the node pairs are far away and distant. When Src and node b are communicating with each other, the other nodes in the discovered path should be idle without utilizing the channel. Instead the other nodes are able to communicate parallelly the end-to-end throughput can be improved with acceptable delay. Incorporating link scheduling algorithms to this key concept further enhances the end-to-end throughput with in the turnaround time. So, in this research work we have applied spatial reuse concept along with link scheduling algorithm to enhance end-to-end throughput with in turnaround time. The proposed algorithm not only ensures that a connection gets the required bandwidth at each mobile node on its way by scheduling required slots to meet the QoS requirements. By considering the bandwidth requirement of the mobile connections, the CAC module at the BS not only considers the bandwidth requirement but also conforming the constrains of system dealy and jitter are met. Result: To verify the feasibility and effectiveness of our proposed work, with respect to scheduling the simulation results clearly shows the throughput improvement with Call Admission Control. The number of dropped calls is significantly less and successful calls are more with CAC. The percentage of dropped calls is reduced by 9 % and successful calls are improved by 91%. The simulation is also conducted on time constraint and ratio of dropped calls are shown. The total time taken to forward the packets and the ration of dropped calls is less when compared to non CAC. On a whole the CAC with scheduling algorithms out performs existing scheduling algorithms. Conclusion: In this research work we have proposed a novel QoS aware scheduling algorithm that provides QoS in Wireless Cellular Networks using Call Admission Control (CAC). The simulation results show that the end-to-end throughput has been increased by 91% when CAC is used. The proposed algorithm is also compared with existing link scheduling algorithms. The results reveal that CAC with scheduling algorithm can be used in Mobile Cellular Networks in order to reduce packet drop ratio. The algorithm is also used to send the packets within acceptable delay.

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