Performance Analysis of Spatial Data Broadcast for Navigation Systems

The modern mobile navigator can display the road map of the surrounding area but has the limited ability to display the real-time statuses of surrounding public sites such as hotels, restaurants, and parking places. One application of mobile navigators is to provide the current vacancy information about public sites via wireless data broadcast, so that any navigator can retrieve the vacancy information by simply listening to the broadcast channel. In this paper, we analyze the performance of data broadcast by measuring the ratio of public sites with up-to-date statuses that a navigator can collect within a certain time interval. We examine the performance in different wireless communication environments: 3G cellular networks, and IEEE 802.11, IEEE 802.16, and IEEE 802.20 wireless networks