Wireless Communication

Samina Mansuri ¹, Hemal Shah ², Yogeshwar Kosta ³

Affiliations
1 Ganpat University, Kherva, Mehsana, Gujarat, IN
2 U. V. Patel College of Engineering, Ganpat University, Kherva, Mehsana, Gujarat, IN
3 Marwadi Education Foundation, Rajkot, Gujarat, IN

Abstract

Delay Tolerant Networks are the networks providing communication services where end to end delay is very long and connectivity is intermittent. In order to achieve data delivery in such challenging networking environments, researchers have proposed the use of store-carry-and-forward mechanism based protocols: there, a node may store a message in its buffer and carry it along for periods of time, until an appropriate contact opportunity arises. Additionally, multiple message replicas are often propagated to increase delivery probability. This combination of long-term storage and replication creates a high storage overhead on mobile nodes. In real world scenarios nodes are having finite buffer storage capacity. Thus, efficient buffer management policies i.e. drop and scheduling are necessary. This paper presents basic aspects of Buffer Management in terms of DTN and narrates the various policies, algorithms, advantages and disadvantages. Finally brief table is presented showing comparative studies of all existing drop and scheduling policies.

Keywords

Buffer Management, DTN, Drop Policies, Scheduling Policies.

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Samina Mansuri ¹, Hemal Shah ², Yogeshwar Kosta ³

Affiliations
1 Ganpat University, Mehsana, IN
2 U. V. Patel College of Engineering, Ganpat University, Mehsana, IN
3 Marwadi Education Foundation, Rajkot, IN

Abstract

Delay Tolerant Networks enable communication in challenged environments where resources like buffer, bandwidth power are limited. Due to the limitation of buffer storage a proper buffer management policy is required which includes the proper drop and scheduling policy. In this paper the buffer management architecture for Delay Tolerant Networks is proposed which segregates the incoming traffic into different queues. This includes policy based admission control, message segregation into queues and scheduling. In scenario of over flow, message gets drop based on different drop policy. Also, forwarding of message upon next contact opportunity is carried with round robin scheduler to ensure fairness. It is planned to implement the proposed work using ONE simulator and do performance analysis.

Keywords

Buffer Management Architecture, DTN, Drop Policy, Scheduling Policy.

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