scholarly journals Adaptive Access Class Barring Method for Machine Generated Communications

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Jaesung Park ◽  
Yujin Lim
Keyword(s):  
Success Probability ◽  
Access Network ◽  
Random Access ◽  
Original Method ◽  
Collision Probability ◽  
Data Traffic ◽  
Coverage Area ◽  
Access Channel ◽  
Communication Devices ◽  
A Cell

Cellular network is provisioned to serve traffic demands generated by human being. The random access channel used for nodes to compete for a connection with an eNB is limited. Even though machines generate very small amount of data traffic, the signaling channel of a network becomes overloaded and collisions occur to fail the access if too many MTC (Machine Type Communication) devices attempt to access network. To tackle the issue, 3GPP specifies an access class barring but leaves a specific algorithm as an implementation issue. In this paper, we propose an adaptive access barring method. Generally, an eNB does not know the number of MTC devices in its coverage area. Thus, it is difficult to control the barring factor by predicting the number of MTC devices in a service area of a cell. On the contrary, we control the barring factor based on the prediction of access intensity which can be measured at an eNB. Simulation results show that since the proposed method can manipulate the barring factor autonomously according to the access intensity, it is superior to the original method in terms of the access success probability and the collision probability.

scholarly journals Enhancing Radio Access Network Performance over LTE-A for Machine-to-Machine Communications under Massive Access

2016 ◽  
Vol 2016 ◽  
pp. 1-16
Author(s):  
Fatemah Alsewaidi ◽  
Angela Doufexi ◽  
Dritan Kaleshi
Keyword(s):  
Network Performance ◽  
Success Probability ◽  
Access Network ◽  
Random Access ◽  
Base Station ◽  
Radio Access Network ◽  
Machine To Machine ◽  
Radio Access ◽  
Access Channel ◽  
Control Traffic

The expected tremendous growth of machine-to-machine (M2M) devices will require solutions to improve random access channel (RACH) performance. Recent studies have shown that radio access network (RAN) performance is degraded under the high density of devices. In this paper, we propose three methods to enhance RAN performance for M2M communications over the LTE-A standard. The first method employs a different value for the physical RACH configuration index to increase random access opportunities. The second method addresses a heterogeneous network by using a number of picocells to increase resources and offload control traffic from the macro base station. The third method involves aggregation points and addresses their effect on RAN performance. Based on evaluation results, our methods improved RACH performance in terms of the access success probability and average access delay.

scholarly journals Preamble Design and Collision Resolution in a Massive Access IoT System

Sensors ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 250
Author(s):  
Ailing Zhong ◽  
Zhidu Li ◽  
Ruyan Wang ◽  
Xingjie Li ◽  
Boren Guo
Keyword(s):  
Detection Probability ◽  
Success Probability ◽  
Random Access ◽  
Future Internet ◽  
Collision Probability ◽  
Collision Resolution ◽  
Simulation Experiments ◽  
Access Channel ◽  
Resolution Scheme ◽  
Random Access Channel

How to support massive access efficiently is one of the challenges in the future Internet of Things (IoT) systems. To address such challenge, this paper proposes an effective preamble collision resolution scheme to sustain massive random access (RA) for an IoT system. Specifically, a new sub-preamble structure is first proposed to reduce the preamble collision probability. To identify different devices that send the same preamble to the gNB on the same physical random access channel (PRACH), a multiple timing advance (TA) capturing scheme is then proposed. Thereafter, an RA scheme is designed to sustain massive access and the performance of the scheme is studied analytically. Finally, the effectiveness of the proposed RA scheme is validated by extensive simulation experiments in terms of preamble detection probability, preamble collision probability, RA success probability, resource efficiency and TA capturing.

scholarly journals Multiple Slot Reservation for Rapid Data Traffic Transmission in the Satellite Random Access Channel

2015 ◽  
Vol 40 (10) ◽  
pp. 1889-1899 ◽  
Author(s):  
Yun-sung Lee ◽  
Jin-seok Lee ◽  
Jae-sung Lim ◽  
Hyung-won Park ◽  
Hong-jun Noh
Keyword(s):  
Random Access ◽  
Data Traffic ◽  
Access Channel ◽  
Random Access Channel

scholarly journals An Improved LTE RACH Protocol for M2M Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Ahmed Samir ◽  
Mahmoud M. Elmesalawy ◽  
A. S. Ali ◽  
Ihab Ali
Keyword(s):  
Success Probability ◽  
Random Access ◽  
Cellular Systems ◽  
M2m Communication ◽  
M2m Communications ◽  
Access Delay ◽  
Access Channel ◽  
Extended Access ◽  
Multiple Devices ◽  
Baseline Solution

Machine-to-machine (M2M) communications allow multiple devices to communicate directly without human intervention. There will be a huge number of devices in the M2M communications which results in enormous congestion in the current Random Access Channel (RACH) of LTE based cellular systems. This paper presents a protocol for improving the performance of the LTE RACH for M2M applications. This protocol, the Distributed Queuing Access for LTE (DQAL), is based on the Distributed Queuing (DQ) algorithm. One of the benefits of using that algorithm is minimizing the collision in the access phase for the M2M communications. The reduction in the collision will turn in enhancing both the access success probability and the access delay for M2M devices (MDs). Furthermore, the protocol is designed to guarantee that the normal User Equipment (UE) device can access the system using the traditional RACH procedures without any modification. This will assure a seamless implementation of the proposed protocol over the existing LTE cellular systems. The simulation results show how the access delay obtained by the proposed DQAL protocol outperforms the Extended Access Baring (EAB) which is the baseline solution recommended by the 3 GPP for M2M communication.

scholarly journals Evaluation of MAC’s Distributed Queuing Algorithm for Internet of Things Applications

2018 ◽  
Vol 10 (3) ◽  
pp. 966
Author(s):  
Mabruka Mohamed Agel ◽  
Mohamed Hadi Habaebi ◽  
Sameha Alnahdi ◽  
Md Rafiqul Islam
Keyword(s):  
Internet Of Things ◽  
Blocking Probability ◽  
Random Access ◽  
Energy Utilization ◽  
Collision Probability ◽  
Medium Access ◽  
Machine To Machine ◽  
Access Delay ◽  
Access Channel

<span>Internet of Things and Machine-to-Machine communications have contributed significantly on our daily life. Nevertheless, from the networking aspect they introduced a huge challenge for the performance and quality of services of networks. In this paper, a Distributed Queuing Access for LTE protocol was analyzed to enhance the random access performance for Machine to machine (M2M) applications. The M2M communications presented countless solicitations that can over-burden the access channel of the present LTE network. This prompts to an expansion in the collision probability and results in a noteworthy access delay. The introduced protocol does improve the performance of Medium access layer in terms of blocking probability, access delay, energy utilization and number of re-transmissions attempts in comparison with the standard LTE protocol without altering the existing LTE outline structure. The new protocol is intended to ensure that the random access procedure of the ordinary UE gadget will not be affected bringing about consistent implementation for the proposed convention.</span>

scholarly journals A Novel Group Paging Control Method for Massive MTC Accesses in LTE Networks

2020 ◽  
Author(s):  
Cong Wang ◽  
Chengqiang Wei ◽  
Ning Li ◽  
Wenfeng Ma ◽  
Hui Tian
Keyword(s):  
Control Method ◽  
Random Access ◽  
Collision Probability ◽  
Utilization Rate ◽  
Lte Networks ◽  
Fifth Generation ◽  
Shared Channel ◽  
A Cell ◽  
Novel Method ◽  
Group Paging

Abstract The fifth-generation (5G) systems have to deal with massive deployment of machine-type-communication (MTC) devices. System overload may occur during a random access (RA) procedure under a limited number of preamble resources and physical uplink shared channel (PUSCH) resources especially when there exist massive MTC devices in a cell. In order to resolve the system overload (caused by the massive MTC deployment), the 3GPP proposed the adopted a group paging (GP)-based uplink access technique. But its performances dramatically decrease as the number of MTC devices increases. In this paper we propose a novel method, named ACB-based group paging overload control method (AGO). To reduce the number of simultaneous access MTC devices, AGO first scatters the MTC devices over a GP interval, and then automatically adjusts ACB parameters according to the load conditions. By doing so, AGO achieves high-channel access probability for MTC devices. Simulation results show that this method is superior to the GP and Pre-backoff (PBO) mechanisms in terms of success and collision probability, average access latency and resource utilization rate.

scholarly journals A Novel Group Paging Control Method for Massive MTC Accesses in LTE Networks

2020 ◽  
Author(s):  
Cong Wang ◽  
Chengqiang Wei ◽  
Ning Li ◽  
Wenfeng Ma ◽  
Hui Tian
Keyword(s):  
Control Method ◽  
Random Access ◽  
Collision Probability ◽  
Utilization Rate ◽  
Lte Networks ◽  
Fifth Generation ◽  
Shared Channel ◽  
A Cell ◽  
Novel Method ◽  
Group Paging

Abstract The fifth-generation (5G) systems have to deal with massive deployment of machine-type-communication (MTC) devices. System overload may occur during a random access (RA) procedure under a limited number of preamble resources and physical uplink shared channel (PUSCH) resources especially when there exist massive MTC devices in a cell. In order to resolve the system overload (caused by the massive MTC deployment), the 3GPP proposed the adopted a group paging (GP)-based uplink access technique. But its performances dramatically decrease as the number of MTC devices increases. In this paper we propose a novel method, named ACB-based group paging overload control method (AGO). To reduce the number of simultaneous access MTC devices, AGO first scatters the MTC devices over a GP interval, and then automatically adjusts ACB parameters according to the load conditions. By doing so, AGO achieves high-channel access probability for MTC devices. Simulation results show that this method is superior to the GP and Pre-backoff (PBO) mechanisms in terms of success and collision probability, average access latency and resource utilization rate.

scholarly journals Exploiting the Capture Effect to Enhance RACH Performance in Cellular-Based M2M Communications

2017 ◽  
Author(s):  
Jonghun Kim ◽  
Jaiyong Lee
Keyword(s):  
Positive Impact ◽  
Success Probability ◽  
Random Access ◽  
Network System ◽  
Capture Effect ◽  
M2m Communication ◽  
Access Channel ◽  
Random Access Channel ◽  
Analysis Models ◽  
The Internet Of Things

Cellular-based machine-to-machine (M2M) communication is expected to facilitate services for the Internet of Things (IoT). However, because cellular networks are designed for human users, they have some limitations. Random access channel (RACH) congestion caused by massive access from M2M devices is one of the biggest factors hindering cellular-based M2M services because the RACH congestion causes random access (RA) throughput degradation and connection failures to the devices. In this paper, we show the possibility exploiting the capture effects, which have been known to have a positive impact on the wireless network system, on RA procedure for improving the RA performance of M2M devices. For this purpose, we analyze an RA procedure using a capture model. Through this analysis, we examine the effects of capture on RA performance and propose a Msg3 power-ramping (Msg3 PR) scheme to increase the capture probability (thereby increasing the RA success probability) even when severe RACH congestion problem occurs. The proposed analysis models are validated using simulations. The results show that the proposed scheme, with proper parameters, further improves the RA throughput and reduces the connection failure probability, by slightly increasing the energy consumption. Finally, we demonstrate the effects of coexistence with other RA-related scheme through simulation result.

On Multiple Access of a Large Number of Machine-Type Devices in Cellular Networks

2018 ◽  
pp. 105-114
Author(s):  
O. S. Galinina ◽  
S. D. Andreev ◽  
A. M. Tyurlikov
Keyword(s):  
Success Probability ◽  
Random Access ◽  
Time Interval ◽  
Short Time Interval ◽  
Control Mechanisms ◽  
Network Access ◽  
Smart Meters ◽  
Machine To Machine ◽  
Machine To Machine Communication ◽  
Machine Communication

Introduction: Machine-to-machine communication assumes data transmission from various wireless devices and attracts attention of cellular operators. In this regard, it is crucial to recognize and control overload situations when a large number of such devices access the network over a short time interval.Purpose:Analysis of the radio network overload at the initial network entry stage in a machine-to-machine communication system.Results: A system is considered that features multiple smart meters, which may report alarms and autonomously collect energy consumption information. An analytical approach is proposed to study the operation of a large number of devices in such a system as well as model the settings of the random-access protocol in a cellular network and overload control mechanisms with respect to the access success probability, network access latency, and device power consumption. A comparison between the obtained analytical results and simulation data is also offered. 

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