A Combined Polling and Random Access Technique for Enhanced Anti-Collision Performance in RFID Systems

2009 ◽  
Vol E92-B (4) ◽  
pp. 1357-1360 ◽  
Author(s):  
Jeong Geun KIM
Keyword(s):  
Random Access ◽  
Rfid Systems ◽  
Access Technique

scholarly journals Random-Access Technique for Self-Organization of 5G Millimeter-Wave Cellular Communications

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Jasper Meynard Arana ◽  
Joo Pyo Han ◽  
Yong Soo Cho
Keyword(s):  
Millimeter Wave ◽  
Detection Probability ◽  
Processing Time ◽  
Random Access ◽  
False Alarm Probability ◽  
Cellular Systems ◽  
Correlation Property ◽  
Different Types ◽  
Multiuser Environments ◽  
Access Technique

The random-access (RA) technique is a key procedure in cellular networks and self-organizing networks (SONs), but the overall processing time of this technique in millimeter-wave (mm-wave) cellular systems with directional beams is very long because RA preambles (RAPs) should be transmitted in all directions of Tx and Rx beams. In this paper, two different types of preambles (RAP-1 and RAP-2) are proposed to reduce the processing time in the RA stage. After analyzing the correlation property, false-alarm probability, and detection probability of the proposed RAPs, we perform simulations to show that the RAP-2 is suitable for RA in mm-wave cellular systems with directional beams because of the smaller processing time and high detection probability in multiuser environments.

scholarly journals Coded Random Access Technique Based on Repetition Codes for Prioritizing Emergency Communication

2020 ◽  
Vol 18 (2) ◽  
pp. 145
Author(s):  
Khoirun Ni'amah ◽  
Solichah Larasati ◽  
Alfin Hikmaturokhman ◽  
Muntaqo Alfin Amanaf ◽  
Achmad Rizal Danisya
Keyword(s):  
Random Access ◽  
Emergency Communication ◽  
Access Technique

scholarly journals Is Satellite Ahead of Terrestrial in Deploying NOMA for Massive Machine-Type Communications?

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4290
Author(s):  
Antonio Arcidiacono ◽  
Daniele Finocchiaro ◽  
Riccardo De Gaudenzi ◽  
Oscar del Rio-Herrero ◽  
Stefano Cioni ◽  
...  
Keyword(s):  
Multiple Access ◽  
Random Access ◽  
Satellite Network ◽  
Service Cost ◽  
Satellite Technology ◽  
Machine Type ◽  
Ground Segment ◽  
Machine Type Communications ◽  
Technical Solutions ◽  
Access Technique

Non-orthogonal multiple access (NOMA) technologies are considered key technologies for terrestrial 5G massive machine-type communications (mMTC) applications. It is less known that NOMA techniques were pioneered about ten years ago in the satellite domain to match the growing demand for mMTC services. This paper presents the key features of the first NOMA-based satellite network, presenting not only the underlying technical solutions and measured performance but also the related deployment over the Eutelsat satellite fleet. In particular, we describe the specific ground segment developments for the user terminals and the gateway station. It is shown that the developed solution, based on an Enhanced Spread ALOHA random access technique, achieves an unprecedented throughput, scalability and service cost and is well matched to several mMTC satellite use cases. The ongoing R&D lines covering both the ground segment capabilities enhancement and the extension to satellite on-board packet demodulation are also outlined. These pioneering NOMA satellite technology developments and in-the-field deployments open up the possibility of developing and exploiting 5G mMTC satellite- and terrestrial-based systems in a synergic and interoperable architecture.

The Performance Analysis of CDMA Traffic Access Self-Similar Equalization Protocol

2014 ◽  
Vol 490-491 ◽  
pp. 1205-1208
Author(s):  
Liang Zheng ◽  
Bin Yan
Keyword(s):  
Performance Analysis ◽  
Power Law ◽  
Performance Optimization ◽  
Random Access ◽  
Data Traffic ◽  
Similar Model ◽  
Network Load ◽  
Self Similar ◽  
Simulation Results ◽  
Access Technique

The random access technique has a bigger influence to the performance optimization of CDMA data traffic. A CDMA random access technique based on self-similar model and its performance analysis are put forward in this paper. The simulation results indicate that the access performance of CDMA data traffic based on self-similar model is attenuated by power law, related to such parameters as fractal coefficient H and network load G. The CDMA traffic access self-similar equalization protocol (TASEP) is put forward and it can improve the access performance of CDMA data traffic distinctly.

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