Wireless Communications and Mobile Computing / 2019 / Article / Tab 7

Review Article

Underwater Wireless Sensor Networks: A Review of Recent Issues and Challenges

Table 7

Comparison MCA protocols.

ProtocolBasedTopologyAdvantagesDisadvantages

T-LohiContentionNot fixed/DistributedIt is used to solve the space time & uncertain data reservation problem while using short wake up time to reduce energy consumption.Node is required to be idle and listen to the channel each in contention round.

R-MACContentionMulti-hopTC & data packets are scheduled to the both sender and receiver side.There is No technique to join for new nodes when node dies or left.

H-MACHybridCentralizedIt accepts the benefits from both contentions based &contention-free protocols while low power consumption/energy reservation.Not Optimal for dense & heavily loaded network.

UWAN-MACHybridDense networkIt achieves synchronized locally schedule even when long propagation delay is present because it required small duty cycle.Difficult to achieve high throughput due to small duty cycle feature.

P-MACHybridCentralizedAccording to information of VDL it works dynamically & adaptively.The addition of P-MAC with multichannel& ad-hoc mechanisms.

MFAMAContentionMobile UWASNA greedy approach intends to maximize throughput.pay compensation to the Fairness.

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