Design and Analysis of Backoff Algorithms for Random Access Channels in UMTS-LTE and IEEE 802.16 Systems

Seo, Jun-Bae; Leung, Victor C. M.

doi:10.1109/tvt.2011.2166569

Cited by 68 publications

(34 citation statements)

References 14 publications

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“…Among these latencies, some are deterministic processing latency, some are latencies related to signal detection, and others are random access latencies related to business activity [22]. Most projects of current research focus on computing of mean value and variance for random access latency; there are few projects of research that focus on probability density function (PDF) [23][24][25] of random access latency [26][27][28]. With quantity of waiting users and channel busy/idle as state variables, the moment generating function (MGF) for PDF of random access latency is deduced based on Markov process in [25,29,30].…”

Section: Related Workmentioning

confidence: 99%

RADB: Random Access with Differentiated Barring for Latency‐Constrained Applications in NB‐IoT Network

Miao

Tian

Cheng

et al. 2018

Wireless Communications and Mobile Computing

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With the development of LPWA (Low Power Wide Area) technology, the emerging NB-IoT (Narrowband Internet of Things) technology is becoming popular with wide area and low-data-rate services. In order to achieve objectives such as huge amount of connection and wide area coverage within NB-IoT, the problem of network congestion generated by random access of numerous devices should be solved. In this paper, we first introduce the background of NB-IoT and investigate the research on random access optimization algorithm. Then we summarize relevant features of NB-IoT uplink and narrowband physical random access channel and design random access with differentiated barring (RADB), which can improve the insufficiency of traditional dynamic access class barring method. At last, the algorithms proposed in this paper are realized with established NB-IoT model using OPNET Modeler platform, and simulations are conducted. The simulation results show that RADB is able to effectively solve preamble request conflict generated by random access of numerous devices and preferentially provide efficient and reliable random access for latency-sensitive devices.

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Section: Related Workmentioning

confidence: 99%

RADB: Random Access with Differentiated Barring for Latency‐Constrained Applications in NB‐IoT Network

Miao

Tian

Cheng

et al. 2018

Wireless Communications and Mobile Computing

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“…Several studies have examined slotted-Aloha-based preamble contention in conjunction with mechanisms that resemble access barring. Seo and Leung [15] (and the closely related model by Yang et al [16]) considered a persistence probability in their Markov-process-based analysis of backoff algorithms. However, in [15], barred UE requests retry the ABC in each subsequent slot.…”

Section: Background and Related Workmentioning

confidence: 99%

Connection Establishment in LTE-A Networks: Justification of Poisson Process Modeling

Tyagi

Аурзада

Lee

et al. 2017

IEEE Systems Journal

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The connection establishment in Long-Term Evolution Advanced (LTE-A) is often executed for distributed user equipment (UE) nodes with frequent small data sets for transmission to the central enhanced Node B. LTE-A connection establishment consists mainly of an access barring check (ABC) followed by preamble transmission (contention). Previous studies of connection establishment have often assumed Poisson characteristics (without verifying the Poisson assumption). In this paper, we introduce a simple equilibrium analysis framework for comprehensively evaluating the LTE-A connection establishment, including both access barring and preamble contention. We conduct a detailed analysis of the backlog arising from the uniform backoff over up to T max o slots by UE requests that failed the barring check or collided in the preamble contention. We verify that the process representing the numbers of backlogged UE requests rejoining the connection establishment tends to Poisson process characteristics for high barring probability and long maximum timeout T max o . We present numerical comparisons of our equilibrium model with simulations for practical parameter settings. The comparisons illustrate the effects of the parameter settings on the convergence of the LTE-A connection establishment dynamics to Poisson characteristics for nonsynchronized and synchronized request arrivals. Index Terms-Access barring check (ABC), backlog model, Long-Term Evolution Advanced (LTE-A), Markov modulated poisson process, Poisson process, preamble contention, uniform backoff.

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“…In [1,2], the authors propose a backoff scheme but only consider the users priority without group priority and the times of unsuccessful sending. Users priority don't be considerd in PUSCH power control proposed in [3,4].…”

Section: Figure 1 Point To Multipoint Group Communication Modelmentioning

confidence: 99%

The Priority Backoff Algorithm and PUSCH Power Control for Random Access in TD-LTE Trunking System

Tang

Lei

Wang

et al. 2012

2012 Second International Conference on Business Computing and Global Informatization

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In this paper we propose priority backoff algorithm for random access procedure setting different re-access probability to users depending on their different group priority grades, different user priority grades and different number of collisions in TD-LTE trunking system. Its objective is to make these groups or users with high priority have lower collision rate and access time delay than those with low priority, and make these users with high collisions number have slightly higher access probability than those with low collisions number in the same grade. In order to make further performance optimization, we also improve the power control policy in PUSCH for sending the random access message according to users' different priority grades. Simulations will validate the analytical result.

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Design and Analysis of Backoff Algorithms for Random Access Channels in UMTS-LTE and IEEE 802.16 Systems

Cited by 68 publications

References 14 publications

RADB: Random Access with Differentiated Barring for Latency‐Constrained Applications in NB‐IoT Network

RADB: Random Access with Differentiated Barring for Latency‐Constrained Applications in NB‐IoT Network

Connection Establishment in LTE-A Networks: Justification of Poisson Process Modeling

The Priority Backoff Algorithm and PUSCH Power Control for Random Access in TD-LTE Trunking System

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