The Sensor Media Access Control (SMAC) protocol is a promising synchronous Low Duty Cycle (LDC) MAC protocol well-known for its periodic listen and sleep mechanism, which minimizes the high energy dissipation associated with idle listening. The use of SMAC’s periodic listen and sleep mechanism leads to a situation in which border nodes have multiple schedules, resulting in extended listening periods and increased energy consumption. Schedule Unified Algorithms (SUA) have been proposed to address border nodes’ high energy consumption by requiring nodes to adhere to a single schedule (i.e. unified schedule). SUA has been shown to decrease energy consumption, but at the cost of increased control overheads and missed event detection. This paper proposes a novel Cluster-based Unified SMAC (CBU-SMAC) algorithm that addresses the border node problem inherent in SMAC and SUA’s high control overheads and missed event detection. The CBU-SMAC algorithm is implemented in NS-3. Its performance is compared to CBU-SMAC without a sleep/wake schedule (CBU-SMAC-WS). CBU-SMAC outperformed CBU-SMAC-WS in terms of energy consumption and Packet Delivery Ratio (PDR), with a significant gain of 24% in energy savings and a mean of 58% in PDR.

传感器媒体访问控制 (SMAC) 协议是一种很有前途的同步低占空比 (LDC) MAC 协议，以其定期侦听和睡眠机制而闻名，该机制可最大限度地减少与空闲侦听相关的高能耗。使用SMAC的周期性监听和睡眠机制会导致边界节点有多个调度的情况，导致监听周期延长，能耗增加。调度统一算法（SUA）已被提出来通过要求节点遵守单一调度（即统一调度）来解决边界节点的高能耗问题。SUA 已被证明可以降低能耗，但代价是增加控制开销和错过事件检测。本文提出了一种新颖的基于集群的统一 SMAC (CBU-SMAC) 算法，该算法解决了 SMAC 和 SUA 的高控制开销和错过事件检测所固有的边界节点问题。CBU-SMAC 算法在 NS-3 中实现。其性能与没有睡眠/唤醒计划的 CBU-SMAC (CBU-SMAC-WS) 进行了比较。CBU-SMAC 在能耗和数据包传输率 (PDR) 方面优于 CBU-SMAC-WS，节能显着提高 24%，PDR 平均提高 58%。