Accurate relay node model for a generic topology of multi-hop networks is still unsolved problem in the Wireless Sensor Networks (WSN) arena. Even though there are lot of multi-hop models in the literature, there is still a lot of scope for improvement in these relay node models to achieve endto-end reliability and delay optimizing energy. In this paper a state behavioural relay node model is developed integrating IEEE 802.5.4 MAC and energy conserving states like Sleep, Idle-Listen and Active-Tx using three dimensional Markov chain framework. Novel window of reference is introduced into relay nodes to decide the wake up strategies and to improve performance of the network. Hence developed model is a combination of asynchronous and periodic protocols which is first in it’s kind of nature. Developed emulation model of the MAC confirms the performance improvement with 95% confidence level. Analysis proves that random anycast routing with proposed duty cycle model extends network lifetime with efficient load sharing among all relay nodes and reduce overall active duration of a node
