| Summary: | 碩士 === 國立成功大學 === 資訊工程學系碩博士班 === 101 === Location-based service (LBS) is a general class of add-on network services using the information on the geographical positions of users. With the significant growth of portable and mobile devices, more and more LBS applications are developed for smart phones or tablet PCs. For example, the touring service is able to provide the neighboring information for tourists. In the past, most touring services only consider how a single user gets the neighboring information from the Internet based on his current geo-location. However, mobile devices have limited battery life and limited wireless access capability. This paper is motivated to discuss and analyze the feasibility of the group touring service. A mobile social network-based group touring scheme (MSN-GTS) is proposed to let users be able to form a one-hop touring group dynamically. Members who subscribe the 3G/3.5G/4G cellular service would share their connections with other members who have only Wi-Fi access capacity. Since a group of users travel together, the proposed MSN-GTS is able to avoid multiple location updating and redundant data downloading. However, based on our experimental results, the one-hop touring group using the Wi-Fi interfaces induces high packet loss and high power consumption. Therefore, our MSN-GTS designs a partially downloaded mechanism to reduce unnecessary POI downloading. Our experimental results reveal that the proposed mechanism can save power and increase cache utilization efficiently.
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