Reza Khoshdelniat

Performance evaluation of IEEE802.15.4 6LoWPAN gateway

6LoWPAN gateway provides an interface for small size devices to establish IP connection with other Internet devices. One of the standard that 6LoWPAN conforms to is IEEE 802.15.4 which is used for low processing and low power devices. This standard uses frequency spectrum of 2.4 GHz ISM band that overlaps with other standards such as WiFi, Bluetooth and even WiMAX. This causes potential congestion and collision that leads to possible degradation in service quality. The main interference in 6LoWPAN is from WLAN devices. In this paper, we study the deployment of channel allocation by considering the effects of the performance based on interference of deployed environment, size of payload and distance length between sensor node and gateway. These performance tests are executed in the presence and absence of overlapping channel in the environment.

Performance evaluation of 6LoWPAN-based precision agriculture

The use of Wireless Sensor Network (WSN) with IP network in Precission Agriculture (PA) would be an added advantage to existing solutions of PA system. However, existing WSN Technologies, such as Zigbee and other legacy sensor networks are originally design for non IP-based WSN. Hence, they have difficulties in constructing global infrastructure for the precision agriculture. On the other hand, IETF task force has come up with an open standard of wireless sensor network called 6LoWPAN which define connectivity of WSN to IP network using IPv6 protocols. Since the 6LoWPAN is a new technology, the use of this standard for Precision Agriculture is scarce. Most of the works are based on Zigbee. Therefore, this paper is contributing on discussing the performance evaluation and fundamental infrastructure setup for 6LoWPAN based Precision Agriculture.

Mobility management schemes and mobility issues in low power Wireless Sensor Network

One of the current most significant active research areas in wireless communication technologies is Wireless Sensor Network (WSN). WSN is widely adopted in the ubiquitous networking due to its large applications in different fields such as healthcare, agriculture, livestock monitoring, and etc. WSN is labeled as less reliable due to few drawbacks such as energy consumption, networking cost, mobility management, and etc. The mobility management issue was given less attention in the WSN because the significant of seamless connectivity is underestimated. Based on analysis of recent literatures, our paper seeks to address the mobility issues in WSN. This paper gives an overview of the available mobility management schemes and examines mobility issues of nodes in network-based mobility schemes.