Stable and unstable operating regions of slotted ALOHA with number of retransmission attempts and number of power levels

Sarker, Jahangir H.

doi:10.1049/ip-com:20050068

Cited by 23 publications

(15 citation statements)

References 20 publications

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“…The Slotted ALOHA system is stable, if the aggregate traffic generation rate is less than or equal to opt G [2,9,11,20]. In this paper this simplified assumption is considered: if the traffic generation rate from all active users in a given time slot is less than or equal to opt G packet per time slot, the system is stable.…”

Section: A Maximum Throughput and Stability With Mpr Capabilitymentioning

confidence: 99%

“…As a result the system will be always stable. More detailed consequence of this assumption for single packet reception can be found in [9] and [11]. The Slotted ALOHA protocol can be used for two different purposes.…”

Section: A Maximum Throughput and Stability With Mpr Capabilitymentioning

confidence: 99%

“…The stability and the maximum throughput of retransmission cut-off Slotted ALOHA can also be increased using multiple power levels [11].…”

mentioning

confidence: 99%

“…All the above mentioned retransmission cut-off Slotted ALOHA protocols [1][2][3][4][5][6][7][8][9][10][11][12][13] have assumed the single packet reception capability. That is, a maximum of one packet can be received successfully per time slot in the receiving side.…”

mentioning

confidence: 99%

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A Retransmission Cut-Off Random Access Protocol with Multi-packet Reception Capability for Wireless Networks

Sarker

Mouftah

2009

2009 Third International Conference on Sensor Technologies and Applications

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A retransmission cut-off algorithm for Slotted ALOHA random access protocol is studied in terms of the new packet generation rate, the number of retransmission trials and the Multi-packet Reception capacity. The retransmission cut-off is not needed for a stable operation of Slotted ALOHA if the new packet generation rate is below a critical limit. The values of these critical limits increase almost linearly with the increase of MPR capability. The throughput never reaches its maximum value if the new packet generation rate is less than the corresponding critical limits irrespective of the number of retransmission trials. The maximum throughput is attained by adjusting the number of retransmission trials, pertaining to the new packet generation rate exceeding the corresponding critical limits. A complete analysis for the new packet generation rate with the proper adjustment of the number of retransmission trials and the Multi-packet Reception capability that maximizes the channel throughput and stable operation is found. The stable and unstable operating regions in terms of the new packet generation rate, the number of retransmission trials and the Multi-packet Reception capability is devised. The throughput and packet rejection probability of retransmission cut-off Slotted ALOHA with Multi-packet Reception capability are also provided.

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Section: A Maximum Throughput and Stability With Mpr Capabilitymentioning

confidence: 99%

Section: A Maximum Throughput and Stability With Mpr Capabilitymentioning

confidence: 99%

“…The stability and the maximum throughput of retransmission cut-off Slotted ALOHA can also be increased using multiple power levels [11].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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A Retransmission Cut-Off Random Access Protocol with Multi-packet Reception Capability for Wireless Networks

Sarker

Mouftah

2009

2009 Third International Conference on Sensor Technologies and Applications

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“…Thus the new packet arrival rate to the direction of a receiving node is (x/y) packet per time slot. Arrival of newly generated and retransmitted packets can be assumed as Poisson [24]. Let the total number of retransmission attempts of a packet be r. The total mean offered traffic to a receiving node is then given by [25] …”

Section: Effect Of Jamming Signals On Half-duplex Slotted Alohamentioning

confidence: 99%

Effect of Jamming Signals on Wireless Ad Hoc and Sensor Networks

Sarker

Mouftah

2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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In Ad Hoc or sensor networks, communication may be achieved between mobile nodes without a central entity (base station), in a half-duplex manner. The impact of jamming signals on those kinds of networks is studied. The contributions of this paper can be divided into two parts. In the first part, the probability of success, throughput and the maximum throughput are derived for the half-duplex Slotted ALOHA in terms of the node transmitting probability, the node receiving probability and average jamming signals rate. Results show that the probability of success, throughput and maximum throughput decrease with the increase of average jamming signals rate. In the second part, the effect of jamming signals on the maximum throughput of retransmission cut-off half-duplex Slotted ALOHA is studied. A close form equation is obtained for the transmission probability from each mobile node that maximizes the channel throughput in the presence of jamming signals. This equation provides the relationship between the new packet transmission probability from each mobile node, jamming signals rate and the number of retransmission attempts. The number of retransmission attempts plays an important role for a lower value of jamming signals rate. The results of this study may be used for system design of halfduplex contention-based multiple access schemes with and without jamming signals and retransmission cut-off.Index Terms-Ad Hoc, half-duplex, jamming signals, node transmitting probability, number of retransmission attempts, sensor, Slotted ALOHA.

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A multiple power level random access method for M2M communications in LTE‐A network

Alavikia

Ghasemi

2016

Trans. Emerging Tel. Tech.

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Access control is an effective way to protect the radio access part of Long‐Term Evolution–Advanced (LTE‐A) network from the overload caused by a huge number of Machine‐Type Communication Devices (MTCDs). A class of access control mechanisms is the Access Class Barring (ACB), which regulates the Machine‐to‐Machine (M2M) traffic in accordance with the available Random Access (RA) resources. In this paper, we extend the single power level ACB scheme to a multiple power level method to increase the number of successfully transmitted requests in the case of overload. Our analysis is based on the capture effect in the third step of RA procedure of the LTE‐A system in which one of the transmitted requests by 2 or more co‐tagged MTCDs, MTCDs which use the same preamble in the first step, can be decoded by the evolved–Node B (eNB). We first formulate the power level selection as an optimization problem assuming the perfect capture model without considering MTCDs' energy budget. Then, to take into account MTCDs' energy consumption, the scenario is extended for the signal‐to‐interference ratio–based capture model. In addition, we investigate the advantages of the proposed multiple power level RA method on discriminating the access of MTCDs with different priorities. The numerical results show that using the optimal parameters, the RA throughput can be improved in comparison with the single power level system at the cost of slightly increasing MTCDs' energy consumption and the complexity of RA procedure.

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Stable and unstable operating regions of slotted ALOHA with number of retransmission attempts and number of power levels

Cited by 23 publications

References 20 publications

A Retransmission Cut-Off Random Access Protocol with Multi-packet Reception Capability for Wireless Networks

A Retransmission Cut-Off Random Access Protocol with Multi-packet Reception Capability for Wireless Networks

Effect of Jamming Signals on Wireless Ad Hoc and Sensor Networks

A multiple power level random access method for M2M communications in LTE‐A network

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