Multi-priority based QoS MAC protocol for wireless sensor networks

Delay and Reliability Analysis of p-Persistent Carrier Sense Multiple Access for Multi-Event Industrial Wireless Sensor Networks

“…Several research works have proposed MAC protocols for multi-priority sensor networks [2,22,23,25,31] and analyzed the effectiveness of CSMA -persistent scheme in terms of network delay and reliability [27][28][29]. In particular, Bhandari and Wang [2] proposed a priority-based deterministic channel access mechanism to reduce the access delay by assigning different MAC layer attributes and used an emergency indication slot to prioritize critical traffic over normal traffic.…”

“…In past few years, many QoS based Medium Access Control (MAC) protocols are proposed for Wireless Sensor Networks (WSNs)/IWSNs based on [1,11,[18][19][20][21][22][23][24][25][26][27][28][29]. However, only few targeted priority as a primary focus.…”

“…However, only few targeted priority as a primary focus. These works can be categorized as reservation based protocols [1,11], contention based protocols [22,23], or hybrid protocols [24,25]. Contention based protocols are based on Carrier Sense Multiple Access (CSMA) scheme which can be split into synchronous and asynchronous protocols.…”

“…In asynchronous protocols, CSMA -persistent is used to reduce the chances of collision and improve efficiency [26][27][28][29]. In addition, there are two protocols which support different levels of priority, namely QoS aware energy-efficient (QAEE) [22] and multi-priority based QoS (MPQ) [23]. The two protocols considered different packet priorities, however, the packets still had to wait until the end of the disputed window before they can be transmitted.…”

Fuzzy Based Enhanced Medium Access Control protocol for Wireless Sensor Networks

“…Because of this proposed approach, the authors had decreased transmission delay and energy consumption. Sohail Sarang, Micheal Drieberg and Azlan Awang [19] had illustrated QoS aware MAC protocol for WSNs. The aim of the literature was to reduce consumption energy and delay in the network.…”