Conclusion

Monitoring applications based on wireless sensor networks represent a new important class of applications that can provide data to different kinds of observers. Furthermore, WSNs must deliver the data of interest according to different parameters, such as power efficiency and latency.

MANAGER

> AGENT

O COMMON NODE

node deploy self-test self-discovery self-configuring operating state control

TRAP_LOCATION TRAP_ENERGY

1-

topology map

GROUP LOCATION

generation

GROUP_ENERGY

energy map generation energy map generation self-maintenance

SET_ADMINISTRATIVE -STATE

aggregation processing

TURN OFF

administrative state = locked

FIGURE 3.6 Applying the MANNA architecture: an example.

Management of WSNs is a new research area that only recently started to receive attention from the research community. This chapter discussed the issue of WSN management and presented autonomic management using the MANNA architecture, which is based on the traditional framework of functional areas and management levels. Adopting this strategy will permit management integration in the future. In the management architecture, the models were built that represent the network state (e.g., WSN topology map, WSN energy map, WSN coverage area map, and WSN production map). These models are important in different applications specified and designed for WSNs.

The fundamental issues about management of WSNs are concerned with how the management application promotes resource productivity and quality of services. Nevertheless, an important aspect is to verify the impact of the management services over the WSN lifetime, latency, goodput, and coverage area.

The important point to be stressed is that, although introduction of management has a cost, this must not affect the network behavior considerably. In fact, the goal is to have the benefits brought by the management solution outweighing the overhead introduced by the management application. Another interesting aspect is that the monitoring scheme to be chosen depends fundamentally on the kind of application monitored. Thus, the management requirements also change among sensor networks.

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