A community-based event delivery protocol in publish/subscribe systems for delay tolerant sensor networks

Area of Science:

• Computer Science
• Networking
• Distributed Systems

Background:

• Delay Tolerant Sensor Networks (DTSNs) face challenges in pervasive data gathering due to intermittent connectivity.
• The publish/subscribe (Pub/Sub) paradigm facilitates asynchronous event delivery but is difficult to extend to DTSNs.

Purpose of the Study:

• To propose a novel protocol for adapting the Pub/Sub paradigm to Delay Tolerant Sensor Networks.
• To address the challenges of frequent network partitioning in DTSNs for event delivery.

Main Methods:

• Developed CED (Community-based Event Delivery), a protocol utilizing stable network communities for event dissemination.
• Implemented CED with two components: community-based event delivery and intelligent queue management.
• Queue management considers event delivery and survival times to optimize transmission and minimize overhead.

Main Results:

• CED enhances data delivery ratios by delivering events when subscribers enter a community.
• Queue management effectively minimizes transmission overhead by judiciously dropping or delivering events.
• Simulation studies demonstrate the effectiveness of the CED protocol in DTSN environments.

Conclusions:

• CED offers a viable solution for integrating Pub/Sub systems into Delay Tolerant Sensor Networks.
• The community-based approach and optimized queue management improve event delivery efficiency.
• CED addresses a significant gap in current research for Pub/Sub systems in intermittently connected networks.