A timeslot assignment scheme for cluster-tree based wireless sensor network

Many efforts have been made to develop time division multiple access （TDMA） slots allocation in a multi-hop converge-cast wireless sensor network （WSN）, however, most of them either use complex algorithm or concern frames only without simultaneous transmission in a single slot. In this paper, we present a timeslot assignment scheme for cluster-tree-based TDMA WSN, co：＇ering three frequently used working modes in practical applications. The shortest frame formed can guarantee real-time conununication and is also facilitated for message and slot integration, since timeslots allocated to a single node are continuous. During allocation processes, the algorithms are distributed and light-weighted. The experiment resulted from a WSN prototype system shows that our scheme can achieve a good reliability.

Many efforts have been made to develop time division multiple access (TDMA) slots allocation in amulti-hop converge-cast wireless sensor network (WSN),however,most of them either use complex algorithmor concern frames only without simultaneous transmission in a single slot.In this paper,we presenta timeslot assignment scheme for cluster-tree-based TDMA WSN,covering three frequently used workingmodes in practical applications.The shortest frame formed can guarantee real-time communication and isalso facilitated for message and slot integration,since timeslots allocated to a single node are continuous.During allocation processes,the algorithms are distributed and light-weighted.The experiment resultedfrom a WSN prototype system shows that our scheme can achieve a good reliability.