Biomedical wireless sensor networks have emerged due to the need to collect medical data from patients faster. One of the key features of these networks should be a low power consumption. ZigBee and Bluetooth Low Energy (BLE) technology is characterized by low power consumption and low data transfer to a small area of coverage, which is suitable for wireless biomedical applications. For this reason, this paper presents a study and analysis of BLE and Zigbee technologies in network of wireless biomedical sensors implemented in the human body for sending data to a mobile device, through an application that displays the results of an electrocardiogram. The main contribution of this paper is to encourage engineers to implement these technologies in wireless sensor networks. Another aim is to encourage researchers and scientists to innovate in the development of methods to reduce energy consumption in wireless biomedical sensor network.

Currently, there has been an increased use of mobile communications devices. This makes necessary to increase the number of base stations in the cellular network so users' service quality is not affected. However, this increase in number of base stations results in an increase in power consumption of the cellular network. Which in turn represents a negative impact both economically and environmentally. For the above reasons, it is necessary to find solutions that help reduce energy consumption in a cellular network. In this paper, we introduce the concept of "cell zooming" a proposed technology that allows the cellular network to be more efficiently with power transmission. Unlike previous studies that perform "cell zooming" with omnidirectional antennas, this paper presents a study of "cell zooming" using sectored antennas. The simulation results show that the use of "cell zooming" with sectored antennas further reduces energy consumption compared with the use of "cell zooming" with omnidirectional antennas.