论文部分内容阅读
在消除传感器节点监测数据之间存在的空间冗余性的同时,尝试通过融合TDMA和CSMA两种模式来提高系统性能。提出的HS-Sift协议将感知区域划分为三个子区域,每个区域采取不同的信道接入方式。在HS-Sift协议下,感知区域边界的节点将主要处于休眠状态,靠近事件地的节点采用调度的方式发送数据以提高信道利用率,而中间部分的节点将采用竞争模式接入信道。模拟实验表明该协议能有效地降低能量耗费以及传输延时。
While eliminating the spatial redundancy existing in sensor node monitoring data, attempts are made to improve system performance by combining two modes of TDMA and CSMA. The proposed HS-Sift protocol divides the sensing area into three sub-areas, each of which adopts different channel access methods. Under the HS-Sift protocol, the nodes at the perimeter of the sensing area will be mainly dormant. The nodes near the event send data by scheduling to improve the channel utilization, while the nodes in the middle part will access the channel by using the contention mode. Simulation results show that the protocol can effectively reduce the energy consumption and transmission delay.