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Energy saving is a critical task for sensor networks with limited energy supply. Wakeup schemes that turn off sensors' radio when communication is not necessary have great potential in energy saving. However, existing wakeup schemes have some limitations. Particularly, many of them encounter the critical tradeoff between energy saving and wakeup latency. In the presence of such tradeoff, limited attention has been paid to reducing the packet end-to-end delay while preserving the energy savingdoi:10.1109/rttas.2004.1317245 dblp:conf/rtas/YangV04 fatcat:2wh7ustadzcgbixyyrqx3x4smi