On Scheduling Guaranteed Time Slots for Time Sensitive Transactions in IEEE 802.15.4 Networks

Mishra, Amitabh; Na, Chewoo; Rosenburgh, Dwayne

doi:10.1109/milcom.2007.4455149

Cited by 14 publications

(11 citation statements)

References 3 publications

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“…Research by Mishra et al [8] provides a scheduling model that attempts to meet the delay constraints of timesensitive transactions. Time constraints meet ratio (TMR) was introduced and the on-line scheduling algorithm using a mathematical model proves to work with aperiodic and periodic messages even in overload conditions.…”

Section: Related Workmentioning

confidence: 99%

Traffic differentiation and dynamic duty cycle adaptation in IEEE 802.15.4 beacon enabled WSN for real-time applications

2015

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The wireless sensor networks (WSNs) based on the IEEE 802.15.4 beacon enabled mode provide a deterministic resource allocation offered by the guaranteed time slot (GTS) mechanism which is ideal for real-time traffic applications that requires high quality of service (QoS). In the beacon enabled mode the active and optional inactive period is governed by superframe order (SO) and beacon order (BO). Adapting the duty cycle using the SO and BO is desirable to accommodate the changing context of the WSNs traffic for network optimisation. However, existing approaches assumed a fixed SO and BO and segregate the evaluation of the contention access period and the contention free period that forms the active segment. To improve the performance of the IEEE 802.15.4 protocol in respect of the trade-off between power consumption and end-to-end delay, within a required QoS, a combination of dynamic priorities for traffic differentiation and dynamic duty cycle adaptation in the GTS allocation process are introduced. This work demonstrates that the proposed solution provides significantly better performance than the standard allocation method by simultaneously satisfying QoS and service differ-B Robert Stewart entiation demands with considerable power savings which is essential for WSNs. The specific novel use of this solution is in an application scenario where the deployed network is situated in an assisted living environment with a rich suite of heterogeneous wireless based communications in place.

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Section: Related Workmentioning

confidence: 99%

Traffic differentiation and dynamic duty cycle adaptation in IEEE 802.15.4 beacon enabled WSN for real-time applications

2015

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“…The network is exemplified by a full-duplex communication channel where each communication direction works at an individual bit rate due to the asymmetric properties characterizing wireless communication networks. The general concept, however, constitutes a generic framework that can be adapted to wireless networks with a deterministic MAC protocol (such as a time-division multiple access (TDMA)-based protocols [23]- [25]). Such adaptations are out of the scope of this paper and are planned future work.…”

Section: Framework Overviewmentioning

confidence: 99%

“…The second constraint, introduced by [28], [29], and generalized by [30], was added in order to be able to insure the continued feasibility of the traffic allocation even in case a new traffic flow is added. The constraint demands that (25) Unfortunately, this constraint introduces a high amount of computational complexity into the feasibility analysis and therefore does not lend itself to calculation particularly well. However, in [31] a way of reducing the time and memory complexity is presented.…”

Section: Real-time Scheduling Analysismentioning

confidence: 99%

Towards Reliable Wireless Industrial Communication With Real-Time Guarantees

Jönsson

Kunert

2009

IEEE Trans. Ind. Inf.

102

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“…Unlike non beacon-enabled mode, the beacon-enabled mode in a 802.15.4 network employs a few end device nodes and a centralized node (i.e., personal area network (PAN) coordinator) which broadcasts beacons to synchronize the nodes in the network, manages guaranteed timeslots (GTS) (de)allocation requests from the nodes, and assigns dedicated slots for transmissions of the nodes through beacons. The beacon broadcast and GTS management scheme are the most critical parts of real-time delivery of time-sensitive data during the contention free period (CFP) [2][3][4][5][6][7]. Many researchers have focused on improving the performance or energy efficiency of beacon-enabled 802.…”

Section: Introductionmentioning

confidence: 99%