Over the past years, wireless sensor systems have picked up a global consideration from both the researchers and the genuine clients. It includes a large number of sensing devices, some computing techniques and commun...Over the past years, wireless sensor systems have picked up a global consideration from both the researchers and the genuine clients. It includes a large number of sensing devices, some computing techniques and communication with limited power supplies and processing abilities which collectively work to fulfill a large sensing task. IEEE 802.15.4/ZigBee based Wireless Sensor Networks raise a few issues like Energy Scavenging for the limited power supply. Accordingly good functioning of such system relies upon energies of the wireless motes. This paper presents two analytical models which demonstrate and predict the QoS in terms of throughput, jitter, average end-to-end delay and energy consumption. These two distinct network models based on IEEE 802.15.4 are cluster-based and grid-based, and are simulated using QualNet v 6.1 Simulator.展开更多
Ad Hoc网络中信道接入协议控制着无线信道的接入,对网络性能起着决定性作用。网络仿真是协议设计中的重要环节,基于此介绍了一种可变时隙跳预约多址接入协议VS-HRMA,利用网络仿真软件Qualnet对其性能进行了仿真并分析了协议的优缺点,明...Ad Hoc网络中信道接入协议控制着无线信道的接入,对网络性能起着决定性作用。网络仿真是协议设计中的重要环节,基于此介绍了一种可变时隙跳预约多址接入协议VS-HRMA,利用网络仿真软件Qualnet对其性能进行了仿真并分析了协议的优缺点,明确了改进的方向。展开更多
文摘Over the past years, wireless sensor systems have picked up a global consideration from both the researchers and the genuine clients. It includes a large number of sensing devices, some computing techniques and communication with limited power supplies and processing abilities which collectively work to fulfill a large sensing task. IEEE 802.15.4/ZigBee based Wireless Sensor Networks raise a few issues like Energy Scavenging for the limited power supply. Accordingly good functioning of such system relies upon energies of the wireless motes. This paper presents two analytical models which demonstrate and predict the QoS in terms of throughput, jitter, average end-to-end delay and energy consumption. These two distinct network models based on IEEE 802.15.4 are cluster-based and grid-based, and are simulated using QualNet v 6.1 Simulator.
