A prioritized multi-channel multi-time slot MAC protocol for large-scale wireless sensor networks

Abstract

This paper addresses a new prioritized multichannel multi-time slot MAC protocol (PMCMTP) for large-scale WSNs especially for Ultra-Wide Band (UWB) based networks. To reduce the complexity of resource sharing, the global network is composed of a set of Personal Area Networks (PANs) or cells. According to available resource and PANs duty cycle, PMCMTP can dynamically assign several data channels per PAN and efficiently allocate time slots to each PAN's members. This significantly decreases delay and increases throughput. Through some simulations, we evaluate the performance of the proposed protocol. The results show that PMCMTP ensures an efficient and fair channels allocation between cells permitting, on the one hand, an enhancement of quality-of-service inside each PAN and, on the other hand, a maximization of channel utility.

Energy Evaluation of PMCMTP for Large-Scale Wireless Sensor Networks

“…At the end of the process of time slots and channels allocation, PAN coordinator registers a trace of requests, which were not served in its queue in order to analyze it during the next cycle. Then, it inserts into the next beacon frame the necessary information ( The detailed description of PMCMTP is out of the scope of this paper, so for more details, the reader can refer to [3].…”

“…In this subsection, we present PMCMTP [3] for logical channels and time slots allocation inside each PAN. Similar to [19], a key concept in PMCMTP is the elementary active cycle, which is composed by two consecutive active periods, the first for synchronization and collect of resource requests, and the second for the Request Scheduling Algorithm (RSA) process, reception of second beacon and allowable data communications (See Figure 4).…”

“…For more details about PMCMTP's performance, in terms of end-to-end delay guarantee and throughput, the reader can refer to [3]. In this paper, we focus on the evaluation of the PMCMTP's behavior in terms of energy saving.…”

“…In [3], we have proposed PMCMTP, a Prioritized MultiChannel Multi-Time slot media access control Protocol which is suitable for real-time and\or high data-rate applications. For more details about PMCMTP's performance, in terms of end-to-end delay guarantee and throughput, the reader can refer to [3].…”

Pmcmtp's Implementation (in nesC/TinyOS2.x) and Testbed for Its Operation Validation

“…In this paper, we present the implementation of a Prioritized Multi-Channel Multi-Time slot media access control Protocol (PMCMTP) [9] for WSNs. We, experimentally, validate the PMCMTP by using a realistic testbed setting.…”