Delay-throughput comparison of single and multi-channel slotted ALOHA networks

Lo, F.L.; Ng, T.S.; Yuk, T. I.

doi:10.1109/icct.1996.545034

Cited by 4 publications

(2 citation statements)

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“…In the Aloha protocol, direct packet transmission is performed regardless of whether another transmission is present in the environment. The worst part of this protocol is that the collision probability is much higher [8][9]. In Slotted Aloha medium access technique, when a packet is ready to be transmitted, the process of transmission is performed at the beginning of time periods after waiting until the beginning of the time periods.…”

Section: System Model Of the Networkmentioning

confidence: 99%

Performance Analysis of Slotted Aloha Protocol in Wireless Cognitive Radio Networks

Bayrakdar¹,

Çalhan²

2015

Balkan Journal of Electrical and Computer Engineering

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With the growing use of frequency based services and devices, the cognitive radio network has become an important technology for the future of wireless networks. However, the number of frequency based network applications for fixed and mobile devices both in licensed, and unlicensed networks also shows a significant increase. In addition to frequency based applications; for efficient use of spectrum in cognitive radio networks, characteristics of medium access techniques is utilized. Among these medium access techniques, slotted Aloha technique is among the most preferred. In our study, simulation of a cognitive radio network environment that consists of primary and secondary users utilizing slotted Aloha medium access technique is performed. The simulation of designed network environment is carried out by using Riverbed software. Upon making end to end delay analysis of the designed network, the results of maximum number of users that could be supported in cognitive radio networks utilizing slotted Aloha technique is observed.

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Section: System Model Of the Networkmentioning

confidence: 99%

Performance Analysis of Slotted Aloha Protocol in Wireless Cognitive Radio Networks

Bayrakdar¹,

Çalhan²

2015

Balkan Journal of Electrical and Computer Engineering

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“…The impact of capture effect of MPR channel on the performance of Slotted ALOHA is studied in [7,[25][26][27][28] and the reference there in. Lo et al [29] compares the delay-throughput performance of Slotted ALOHA network in SPR and MPR channel where with the same packet generation probability and retransmission rate, throughput of the two channel is close while time delay of MPR channel is no more than 5% of that in SPR channel. In this paper, the numerical result for MPR channel is proposed while the analytical result of time and energy cost of the event-driven process in SPR channel is derived.…”

Section: Introductionmentioning

confidence: 98%

First Passage Time Analysis in Wireless Sensor Networks for SPR and MPR Systems

Wang

2008

Wireless Pers Commun

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In this paper, we study the performance of Slotted ALOHA in an elementary process in wireless sensor networks, in which sensors are activated by rare events and transmit packets to a single sink node within single hop. The time cost of the process can be viewed as a first passage time and we give the expectation of time and energy cost which is dependent on both the size of active nodes and their transmission rate by a first passage time analysis. Meanwhile, given the size of active nodes n, we demonstrated that the optimal transmission rate λ min (n) by which the first passage time attains its minimum, is nearly √ log n/n. Our result indicates that time cost of the process in which each node transmits packet with transmission rate λ min (n) increases nearly linearly with n increasing. We present the maximum likelihood estimate (MLE) of the size of active nodes from the viewpoint of sink nodes so that activated nodes can adjust its transmission rate to improve the performance of the process. Energy dissipation and time cost of the procedure in the channel model of Multi Packet Reception (MPR) are considered also. Numerical results indicate that both time cost and energy consumption of the procedure in MPR channel is superior to that in Single Packet Reception (SPR) channel while the transmission rate near or less than the optimal values with which time costs attain their minimum. Otherwise the energy dissipation in MPR channel is more than that in SPR channel although comparison of time cost in the above two channels reveals the superiority of MPR channel.

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