Abstract
In this paper, a novel two-tier mechanism for the access control and resource allocation of a two-hop high data rate IEEE 802.15.5 network is proposed. One of the main contributions in this proposal is the use of a dynamic superframe size in the IEEE 802.15.5. Additionally, the ideas of using a superframe utilization threshold and a channel time allocation period (CTAP) utilization threshold are incorporated, with the aim of allowing more devices to access the shared superframe. Using these thresholds, two new hop-1 resource allocation algorithms are described; CTAP utilization threshold-based resource allocation algorithm (CTRA) and superframe utilization threshold-based resource allocation algorithm (STRA). These algorithms control the access of the hop-1 Mesh PicoNet Coordinators (MPNCs) and Mesh DEVices (MDEVs) to the channel time resources in the superframe. Furthermore, an algorithm for the distribution of the hop-1 MPNCs' resources among the real-time (RT) and non-real-time (NRT) MDEVs at hop-2 is introduced. In this mechanism, a new flag metric is applied to provide higher priorities to MPNCs over MDEVs in the hop-1 algorithms and to the RT MDEVs over the NRT MDEVs in the hop-2 algorithm. Simulation results show the superiority of the proposed mechanism over others by providing a higher satisfaction factor and higher fairness among the competing devices at both hop-1 and hop-2 of the IEEE 802.15.5.
Highlights
A new high data rate (HR) wireless personal area network (WPAN) standard has been developed by IEEE 802.15.3 task group (TG) [1]
Because of the low data rate provided by the LR WPAN, our work focuses on the HR WPAN which provides a high data transmission of 55 Mbps that is suitable for supporting RT applications
Stage (3) - Hop-1 channel time calculations: In this stage, the behavior of the two hop-1 algorithms is differentiated as follows: 6.1.1 channel time allocation period (CTAP) utilization threshold-based resource allocation algorithm Firstly, the ref-Mesh PicoNet Coordinators (MPNCs) checks if the request received is sent by a MPNC or a Mesh DEVices (MDEVs)
Summary
A new high data rate (HR) wireless personal area network (WPAN) standard has been developed by IEEE 802.15.3 task group (TG) [1]. Stage (3) - Hop-1 channel time calculations: In this stage, the behavior of the two hop-1 algorithms is differentiated as follows: 6.1.1 CTAP utilization threshold-based resource allocation algorithm Firstly, the ref-MPNC checks if the request received is sent by a MPNC or a MDEV (see Figure 12). It checks the MPNC_TL or MDEV_TL, and it grants the channel times . The fairness index value is a positive number with max value 1 indicating a 100% fair system
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