scholarly journals Adaptif Poly Frame PRMA pada Jaringan M2M Kognitif Kapiler

2020 ◽  
Vol 7 (5) ◽  
pp. 923
Author(s):  
Eko Arifianto ◽  
Aghus Sofwan ◽  
Teguh Prakoso
Keyword(s):  
Multiple Access ◽  
Large Data ◽  
Frame Structures ◽  
Transmission Method ◽  
M2m Communication ◽  
Successful Transmission ◽  
Transmission Cycle ◽  
Data Rates ◽  
Event Driven ◽  
Packet Reservation Multiple Access

<p class="Abstrak">Komunikasi mesin ke mesin (M2M) pada jaringan kapiler, menggunakan metode transmisi<em> Packet Reservation Multiple Access</em> (PRMA), dan struktur <em>frame</em> data<em> frame</em> biasa, serta skenario komunikasi<em> event driven</em>. Seiring dengan pertambahan perangkat, metode, struktur <em>frame</em> dan skenario komunikasi tersebut tidak dapat menangani laju data yang sangat banyak, sehingga terjadi kemacetan yang memperlambat komunikasi. Penelitian ini bertujuan membuat komunikasi M2M yang lancar walaupun perangkat bertambah banyak, dengan membuat struktur <em>frame </em>baru dan skenario komunikasi baru<em>, </em>berupa <em>Adaptive Poly Frame </em>(APF) serta <em>Scheduler Update </em>(SU). APF dan SU dirancang dengan memberikan nomor urut serta prioritas pada data, yang kemudian dioptimasi dengan meningkatkan peluang persaingan MK (O), jumlah siklus huni <em>slot</em><em> </em>(B), jumlah siklus huni kanal (S), dan Transmisi Sukses<em> </em>PRMA (TS<sub>PRMA</sub>). Penelitian ini menghasilkan transmisi sukses 92-28%, optimasi transmisi sukses 93-30%, siklus transmisi 1,5-8,1% dan reduksi siklus transmisi 0,9-7,2%.</p><p class="Abstrak"><em><strong>Abstract</strong></em></p><p class="Abstrak">Machine to machine (M2M) communication in capillary networks, using the Packet Reservation Multiple Access (PRMA) transmission method, and ordinary frame data frame structures, as well as event driven communication scenarios. Along with the addition of devices, methods, frame structures and communication scenarios cannot handle very large data rates, resulting congestion that results in inefficient communication. This research aims to make M2M communication efficient even though the device is multiplying, by creating new frame structures and new communication scenarios, in the form of Adaptive Poly Frame (APF) and Scheduler Update (SU). APF and SU are designed by sequence number and prioritizing data, which is then optimized by increase the chance of MK contestation (O), the number of slot occupancy cycles (B), the number of canal occupancy cycles (S) and PRMA Success Transmission (TS<sub>PRMA</sub>). This research resulted in 92-28% successful transmission, 93-30% successful transmission optimization, 1.5-8.1% transmission cycle and 0.9-7.2% transmission cycle reduction</p>

scholarly journals Source Detection with Interferometric Datasets

2011 ◽  
Vol 7 (S285) ◽  
pp. 414-416
Author(s):  
Cathryn M. Trott ◽  
Randall B. Wayth ◽  
Jean-Pierre R. Macquart ◽  
Steven J. Tingay
Keyword(s):  
Paradigm Shift ◽  
Large Range ◽  
Matched Filter ◽  
Large Data ◽  
Radio Sources ◽  
Source Detection ◽  
Data Rates ◽  
Automated Algorithms ◽  
Performance Results ◽  
Short Time

AbstractThe detection of sources in interferometric radio data typically relies on extracting information from images, formed by Fourier transform of the underlying visibility dataset, and CLEANed of contaminating sidelobes through iterative deconvolution. Variable and transient radio sources span a large range of variability timescales, and their study has the potential to enhance our knowledge of the dynamic universe. Their detection and classification involve large data rates and non-stationary PSFs, commensal observing programs and ambitious science goals, and will demand a paradigm shift in the deployment of next-generation instruments. Optimal source detection and classification in real time requires efficient and automated algorithms. On short time-scales variability can be probed with an optimal matched filter detector applied directly to the visibility dataset. This paper shows the design of such a detector, and some preliminary detection performance results.

Performance Analysis of 2-D Prime Codes Encoded Optical CDMA System

2019 ◽  
Vol 40 (4) ◽  
pp. 463-472
Author(s):  
Ankita Rani ◽  
Deepak Kedia
Keyword(s):  
Multiple Access ◽  
Electrical Power ◽  
Multiple Access Interference ◽  
Optical Cdma ◽  
Wavelength Division ◽  
High Data ◽  
Construction Methods ◽  
Data Rates ◽  
Improved Performance ◽  
Code Division Multiple

Abstract Optical code division multiple access (OCDMA) system provides highly secured transmission in addition to its capabilities to support asynchronous transmission and soft blocking. Two-dimensional OCDMA codes are chosen in this paper due to their high cardinality, good spectral efficiency and flexibility in their construction methods against direct sequence codes. This paper focuses on study of impact of multiple access interference (MAI) at high data rates for 2-D prime codesbased OCDMA system. It is shown that how the change in number of simultaneous users affects the transmission quality. Further, performance of the system is analysed in terms of bit error rate, received electrical power and eye openings. In addition, this paper also shows a comparative analysis of 2-D codes-based OCDMA system and wavelength division multiple access (WDMA) system in order to justify the improved performance of the proposed system. It is observed that the performance of 2-D OCDMA system is much better than WDMA system in terms of quality as well as security.

scholarly journals A MAP Overhead Aware Two-Dimensional OFDMA Burst Construction Algorithm

2019 ◽  
Vol 9 (2) ◽  
pp. 354 ◽  
Author(s):  
Lin-Kung Chen ◽  
Pi-Tzong Jan ◽  
Yen-Hung Chen ◽  
Rui-Ze Hung ◽  
Yen-Jung Lee
Keyword(s):  
Multiple Access ◽  
Large Data ◽  
5G Networks ◽  
Heavy Load ◽  
Coding Scheme ◽  
Channel Quality ◽  
Construction Algorithm ◽  
Construction Methods ◽  
Modulation Coding ◽  
Data Transferring

Conventional orthogonal frequency division multiple access (OFDMA) burst construction methods can only support limited numbers of connections due to the map overhead and corresponding limitations in the numbers of orthogonal resources blocks, which limits the capacity of current 4G and the following 5th generation (5G) networks. This study therefore provides a novel OFDMA burst construction algorithm and enhanced burst indexing aware algorithm (EHA), which try to maximize the throughput while considering the subchannel diversity and optimizing burst indexing issues. The EHA not only allocates the subchannels with the best channel quality for each burst, but also groups the bursts to alleviate the MAP overhead. Simulation results showed that the EHA yields two times the throughput that has been achieved using previous algorithms under a heavy load. Two contributions of the EHA are: (1) the overhead of burst indexing decreases because massive numbers of connections can be accommodated by one burst; and (2) the overall throughput increases due to that one connection with large data transferring requirements can be split and distributed into several bursts and placed on the subchannels with good channel quality to adopt better modulation coding scheme (MCS), if the saved bandwidth in this burst construction is more than the increased overhead of burst indexing.

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