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Priority-based delay mitigation for event-monitoring IEEE 802.15.4 LR-WPANs

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2 Author(s)
Tae Hyun Kim ; Sch. of Electr. Eng., Seoul Nat. Univ., South Korea ; Sunghyun Choi

IEEE 802.15.4 slotted carrier-sense multiple access with collision avoidance (CSMA-CA) adopts periodic sleeping for energy efficiency support. However, such a periodic sleeping mechanism, especially with contention-based medium access, tends to cause additional sleep delay due to heavy contention. In this letter, we propose a priority-based scheme, comprising frame tailoring and priority toning, in order to relax such a problematic delay and guarantee time-bounded delivery of high priority packets in event-monitoring networks.

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Communications Letters, IEEE  (Volume:10 ,  Issue: 3 )