Hybrid TDMA/CSMA protocol for self managing packet radio networks

Sharp, B.A.; Grindrod, E.; Camm, D.A.

doi:10.1109/icupc.1995.497145

Cited by 22 publications

(16 citation statements)

References 2 publications

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“…While the combination of TDMA and CSMA has already been considered almost twenty years ago for a single channel VHF data communications network [13], among the first work in the domain of software defined radio (SDR) was carried out in [6] and [5].…”

Section: Related Workmentioning

confidence: 99%

Implementation and evaluation of a flexible, load-adaptive link layer protocol

Puschmann

Mitschele‐Thiel

2014

Proceedings of the 9th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization

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We design, implement and evaluate a load-adaptive MAC protocol based on a flexible, component-based link layer architecture. We first present the overall architecture that facilitates a generic data transfer protocol used by ordinary user applications and management functions of the link layer, called link layer apps. Based on this architecture, we propose a load-adaptive MAC protocol for fixed spectrum networks that is designed as a link layer app on top of the data transfer protocol. The protocol reuses existing MAC blocks and allows switching between those based on run-time analysis of the wireless communication system performance. Finally, we evaluate a SDR implementation of the entire system through various experiments.

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Section: Related Workmentioning

confidence: 99%

Implementation and evaluation of a flexible, load-adaptive link layer protocol

Puschmann

Mitschele‐Thiel

2014

Proceedings of the 9th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization

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“…Carrier Sense Multiple Access with Collision Avoidance (CSMA) [3], IEEE 802.11DCF [4] are based on contention. And hybrid protocols, such as TDMA/CSMA [5], are based both on contention and reservation. The MAC protocols based on Time Division Multiplex Access (TDMA) has the advantages of non-conflict, maximum transmission delay controllable.…”

Section: Introductionmentioning

confidence: 99%

An Evolutionary MAC Protocol based on FPRP for Decreasing Delay

Yang¹,

Zhuang²,

Shi

2010

JDCTA

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Five-Phase Reservation Protocol (FPRP) is a single channel, Time Division Multiplex Access (TDMA) based broadcast scheduling protocol for Ad Hoc network. A modified Medium Access Control (MAC) protocol based on FPRP for decreasing packet delay is proposed in this paper. In FPRP, There are quite a lot of reservation cycles in slots is not fully used, especially in latter slots, for the reason that the number of contention nodes decrease in latter slots. By modifying the frame structure of the Five Phase Reservation Protocol (FPRP), the time of slots assignment can be greatly decreased in the modification FPRP (MFPRP). The simulation results reveal that the reduction in reservation cycles doesn't affect the throughput in network obviously.

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“…Adapting a hybrid behavior between TDMA and CSMA according to the level of contention was first explored in [7]. DRAND [8] is a relatively scalable channel scheduling algorithm that can be used to assign time slots to network nodes.…”

Section: Introductionmentioning

confidence: 99%

“…B-MAC [2] is a low power MAC protocol designed for sensor networks. Utilizing the work of [7], [8], and [2], Z-MAC [9] is another hybrid MAC protocol also designed for sensor networks.…”

Section: Introductionmentioning

confidence: 99%

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LA-MAC: A Load Adaptive MAC Protocol for MANETs

Yousefi'zadeh

2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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Abstract-The performance of prevalent MAC protocols in MANETs relies on the level of contention in networks. While contention-based MAC protocols such as CSMA suffer from inefficiency under high contention, slot-based MAC protocols such as TDMA perform in the opposite way. In this paper, we propose a hybrid protocol to which we refer as LoadAdaptive MAC (LA-MAC) protocol for MANETs. By adaptively switching its running mode between CSMA and TDMA, LA-MAC achieves high channel utilization under both high and low contention. We report our implementation of LA-MAC on a MANET testbed formed by a collection of Multiple-Input Multiple-Output (MIMO) Universal Software Radio Peripheral (USRP) software defined radio nodes. We program the PHY layer of USRP nodes using GNU Radio and integrate LA-MAC with the PHY layer implementation of USRP. Through experimental studies, we demonstrate the performance improvements of LA-MAC relative to CSMA and TDMA.

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Hybrid TDMA/CSMA protocol for self managing packet radio networks

Cited by 22 publications

References 2 publications

Implementation and evaluation of a flexible, load-adaptive link layer protocol

Implementation and evaluation of a flexible, load-adaptive link layer protocol

An Evolutionary MAC Protocol based on FPRP for Decreasing Delay

LA-MAC: A Load Adaptive MAC Protocol for MANETs

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