ABSTRACT
Contents 22.1 Introduction ................................................................................................................... 647 22.2 Challenges for QoS Support in WSNs ........................................................................... 647
22.2.1 Autonomous ....................................................................................................... 647 22.2.2 Scalability ........................................................................................................... 647 22.2.3 Random Deployment ......................................................................................... 647 22.2.4 Network Dynamics ............................................................................................ 647 22.2.5 Resource Constraints .......................................................................................... 648 22.2.6 Unbalanced Traffic ............................................................................................. 648 22.2.7 Data Redundancy ............................................................................................... 648 22.2.8 Energy Balance ................................................................................................... 648 22.2.9 Data-Centric ....................................................................................................... 648 22.2.10 Multiple Sinks .................................................................................................. 648 22.2.11 Application Specific .......................................................................................... 649 22.2.12 Packet Criticality .............................................................................................. 649 22.2.13 Noisy Medium .................................................................................................. 649 22.2.14 Standardization ................................................................................................. 649 22.2.15 Variable Data Rate ............................................................................................ 649 22.2.16 Heterogeneous Networking .............................................................................. 649
22.3 QoS Performance Metrics in WSNs ................................................................................650 22.3.1 Network-Level QoS Metrics ................................................................................650
