Massive growth of home wireless networking revives the opportunity to achieve citywide ubiquitous wireless access by building a WiFi overlay based on the principle of broadband sharing. This kind of large-scale overlay network poses new challenges for wireless network planning. In this scenario, the number of possible locations to install public hotspots is larger, by order of magnitude, to tho...

WiFi network traffics will be expected to increase sharply in the coming years, since WiFi network is commonly used for local area connectivity. Unfortunately, there are difficulties in WiFi network research beforehand, since there is no common dataset between researchers on this area. Recently, AWID dataset was published as a comprehensive WiFi network dataset, which derived from real WiFi tra...

We study six months of human mobility data, including WiFi and GPS traces recorded with high temporal resolution, and find that time series of WiFi scans contain a strong latent location signal. In fact, due to inherent stability and low entropy of human mobility, it is possible to assign location to WiFi access points based on a very small number of GPS samples and then use these access points...

Currently, people can collect information and share resources on the Internet through WiFi. The Voice over Internet Protocol (VoIP) supported by wireless technology has made Internet access more versatile and flexible than before. However, the more sessions established for communication, the longer the transmission delay and the higher the packet dropping rate. In this paper, an improved bandwi...

As the IEEE 802.11 based internet access is becoming ubiquitos available it is excepted that WLAN will be applied for telephony. In this paper we follow the objective to access whether WLAN allows calls at toll quality. Toll quality is the minimal quality of PSTN-based telephons calls. With simulations we evaluate the MAC protocol modes distribution coordination function (DCF), enhanced DCF (ED...

Along with the explosive growth of smart phones, a new wave of the mobile device development is on the way, in which the WiFi enabled cellular phone has been taking an extremely important position. Unlike the desk top PC and notebook computers, integrating the WiFi radio within a cellular phone is much more complicated and challenging than simply putting two systems in a box with the form facto...

WiFi networks, which have been widely used along with the explosive increases in the supply of smartphones, can provide high network speeds but cannot prevent user information spills though rogue Access Points (APs). Therefore, the present paper proposes a method to exchange SSL session keys through more secure 3G networks to be used in WiFi networks in order to prevent such spills. In the prop...

In order to solve the problems that production management of agricultural greenhouses consumes large human resources, low efficiency, and limitations environmental monitoring, a visualized smart agriculture based on ZigBee WiFi dual-protocol fusion Wireless Sensor Networks (WSNs) technology is proposed. A system The takes STM32 as main control core builds visual cloud computing platform ESP8266...

Visible light communication (VLC) has wide unlicensed bandwidth, enables communication in radio frequency (RF) sensitive environments, realizes energy-efficient data transmission, and has the potential to boost the capacity of wireless access networks through spatial reuse. On the other hand, WiFi provides more coverage than VLC and does not suffer from the likelihood of blockage due to the lig...

This paper presents an aided dead-reckoning navigation structure and signal processing algorithms for self localization of an autonomous mobile device by fusing pedestrian dead reckoning and WiFi signal strength measurements. WiFi and inertial navigation systems (INS) are used for positioning and attitude determination in a wide range of applications. Over the last few years, a number of low-co...