Fault-Tolerant and Load Balancing Localization of Services in Wireless Sensor Networks

Abstract

Heterogeneous wireless sensor networks are made up of different kinds of nodes. Some nodes, the sensors, are used as an interface to the physical environment. Other nodes act instead as servers, providing various services to the sensors. In this paper we define an architecture to enable the sensors to efficiently localize the services, and hence the servers. Our is a two-tier server architecture. The first tier is made up of the actual servers. The second tier is formed by nodes that are basically standard nodes (like the sensors). These nodes know the current position of the servers (they are called server locators). Sensors needing service query the server locators to find the corresponding service. The service locator sends a service position to the sensor. Finally, once got ahold of a server location, a sensor uses the service directly. Our server architecture provides load balancing (of queries to the servers) and is tolerant to server faults. Sensor nodes are endowed with caches to maintain the location of popular services. Experiments demonstrate the effectiveness of using caches at the sensor nodes.

Performance evaluation of an efficient fault tolerant service discovery protocol for vehicular networks

“…In Nidito et al (2007), the authors presented a two-tier server localization architecture for heterogeneous wireless sensor networks. The first tier is comprised of the servers and the second tier is comprised of standard sensor nodes acting as server locators.…”

Efficient load balancing and QoS-based location aware service discovery protocol for vehicular ad hoc networks

“…Very little study has been done on the design of load balancing and QoS-based service discovery protocol in vehicular networks [4]. In [4], a server localization architecture for heterogenous wireless sensor networks is presented.…”

“…In [4], a server localization architecture for heterogenous wireless sensor networks is presented. The authors present a two-tier server architecture.…”

Location Management in Multi-Hop Wireless Sensor Networks

“…In order to use one of these services, a sensor node needs to retrieve the location of the node that offers it, i.e., a services localization scheme is required. This is the problem tackled by Nidito et al 64 They propose a rendezvous-based service management scheme, in which each node providing one or more services (also referred as server nodes) are mapped to some special nodes (server locators) that know the location of server nodes and the services they provide. Each server node registers its services to some server locators.…”