Catora: congestion avoidance through transmission ordering and resource awareness in delay tolerant networks

McGeehan, Douglas; Madria, Sanjay

doi:10.1007/s11276-020-02416-x

Cited by 13 publications

(2 citation statements)

References 35 publications

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“…The occupied memory portion must be released as soon as possible to enable other critical space applications to use it; otherwise, memory storage depletion and data overflow would certainly occur [86]. Many techniques are proposed to automate buffer management, either using Reinforcement Learning [87] or priority based message delivery and deletion [88]. Moreover, deploying swarms of cost-effective satellites increases the link availability.…”

Section: E Enabling Technologiesmentioning

confidence: 99%

A Roadmap Toward a Unified Space Communication Architecture

2021

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In recent years, the number of space exploration missions has multiplied. Such an increase raises the question of effective communication between the multitude of human-made objects spread across our solar system. An efficient and scalable communication architecture presents multiple challenges, including the distance between planetary entities, their motion and potential obstruction, the limited available payload on satellites, and the high mission cost. This paper brings together recent relevant specifications, standards, mission demonstrations, and the most recent proposals to develop a unified architecture for deep-space internetworked communication. After characterizing the transmission medium and its unique challenges, we explore the available communication technologies and frameworks to establish a reliable communication architecture across the solar system. We then draw an evolutive roadmap for establishing a scalable communication architecture. This roadmap builds upon the mission-centric communication architectures in the upcoming years towards a fully interconnected network or InterPlanetary Internet (IPN). We finally discuss the tools available to develop such an architecture in the short, medium, and long terms. The resulting architecture cross-supports space agencies on the solar system-scale while significantly decreasing space communication costs. Through this analysis, we derive the critical research questions remaining for creating the IPN regarding the considerable challenges of space communication.

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Section: E Enabling Technologiesmentioning

confidence: 99%

A Roadmap Toward a Unified Space Communication Architecture

2021

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“…DTNs work under a predefined mechanism called the "store and forward rule" [2]. Each message/data is stored in a node and forwarded upon successful connection [3,4]. The sender node will keep a copy of the sent message until and unless it receives an acknowledgment from the receiver [5].…”

Section: Introductionmentioning

confidence: 99%

NPBMT: A Novel and Proficient Buffer Management Technique for Internet of Vehicle-Based DTNs

Khan,

Saeed,

Majeed

et al. 2023

CMC

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Delay Tolerant Networks (DTNs) have the major problem of message delay in the network due to a lack of endto-end connectivity between the nodes, especially when the nodes are mobile. The nodes in DTNs have limited buffer storage for storing delayed messages. This instantaneous sharing of data creates a low buffer/shortage problem. Consequently, buffer congestion would occur and there would be no more space available in the buffer for the upcoming messages. To address this problem a buffer management policy is proposed named "A Novel and Proficient Buffer Management Technique (NPBMT) for the Internet of Vehicle-Based DTNs". NPBMT combines appropriate-size messages with the lowest Time-to-Live (TTL) and then drops a combination of the appropriate messages to accommodate the newly arrived messages. To evaluate the performance of the proposed technique comparison is done with Drop Oldest (DOL), Size Aware Drop (SAD), and Drop Larges (DLA). The proposed technique is implemented in the Opportunistic Network Environment (ONE) simulator. The shortest path mapbased movement model has been used as the movement path model for the nodes with the epidemic routing protocol. From the simulation results, a significant change has been observed in the delivery probability as the proposed policy delivered 380 messages, DOL delivered 186 messages, SAD delivered 190 messages, and DLA delivered only 95 messages. A significant decrease has been observed in the overhead ratio, as the SAD overhead ratio is 324.37, DLA overhead ratio is 266.74, and DOL and NPBMT overhead ratios are 141.89 and 52.85, respectively, which reveals a significant reduction of overhead ratio in NPBMT as compared to existing policies. The network latency average of DOL is 7785.5, DLA is 5898.42, and SAD is 5789.43 whereas the NPBMT latency average is 3909.4. This reveals that the proposed policy keeps the messages for a short time in the network, which reduces the overhead ratio.

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