A Hole Self-Organization Real-Time Routing Protocol for Irregular Wireless Sensor Networks

Abstract

The real-time data dissemination schemes exploit the spatiotemporal commuication approach which forwards data at the delivery speed calculated with the desired time deadline and the end-to-end distance in wireless sensor networks (WSNs). In practical environments, however, the performance of the real-time data dissemination might be degraded by additional and inevitable delay due to some holes. Namely, the holes lengthen the data delivery path and the spatiotemporal approach could not estimate a distance of the data delivery path. To deal with this, we propose A Hole Self-Organization Real-time Routing Protocol for Irregular Wireless Sensor Networks. In proposed protocol, nodes around holes could detect them at deploying phase. A hole is represented as a circle with center point and radius. This hole information is processed and provided as a form of location service. When a source queries a destination location, location provider replies certain points for avoiding holes as well as destination location. Thus, the source could set desired speed toward the destination via the points.Performance evaluation shows that provides better real-time service in practical environments.

Optimization of Heterogeneous Clustering Routing Protocol for Internet of Things in Wireless Sensor Networks

“…Step3: fit and estimate the cluster head radius based on the adaptive bandwidth. At this time, the calculation formula of the corresponding cluster head radius is shown in formula (7). Control the corresponding cluster head radius between the minimum cluster head radius and the maximum cluster head radius.…”

“…From the routing protocol algorithm level of wireless sensor networks, its main research contents focus on two levels: hierarchical routing protocol and planar routing protocol [7]. The corresponding plane routing protocol mainly takes the data as the center and continuously sends the corresponding data to the corresponding adjacent data nodes in the form of broadcasting.…”

Energy-Efficient Face Routing Protocol Considering Radio Range in Wireless Sensor Networks

“…무선 센서 네트워크 특성상 수많은 센서 노드들이 넓은 지역에 임의로 배치되어 전체적으로 고르게 분 포되지 않는다. 즉, 일부 지역은 센서 노드들이 밀집 되게 배치되지만 다른 일부 지역은 노드가 고장 나거 나 호수, 빌딩과 같은 지형적 요인으로 인해 통신이 불가능한 지역인 음영 지역 (Void area)이 생기게 된 다 [7][8][9][10] . 음영지역에서 그리디 라우팅으로 데이터를 전 달할 경우, 목적지에 가까운 이웃 노드가 존재하지 않 아 선택할 수 없게 되어 데이터를 전달하지 못한다.…”