Wireless sensor networks (WSNs) have long been established as a suitable technology for gathering and processing information\nfrom the environment. However, recent applications and new multimedia sensors have increased the demand for a more\nadequate management of their quality of service (QoS). The constraints and demands for this QoS management greatly depend\non each individual networkâ??s purpose or application. Low-Energy Adaptive Clustering Hierarchy (LEACH) is arguably the most\nwell-known routing protocol for WSNs, but it is not QoS-aware. In this paper, we propose LEACH-APP, a new clustering\nprotocol based on LEACH that takes the networkâ??s application into account and is aimed at providing a better overall QoS\nmanagement. We thoroughly describe our proposal and provide a case study to explain its operation. Then, we evaluate its\nperformance in terms of two significant QoS metrics-throughput and latency-and compare it to that of the original protocol.\nOur experiments show that LEACH-APP increases the throughput by roughly 250% and reduces the latency by almost 80%,\noverall providing a more flexible and powerful QoS management.
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