Hybrid Data Access in Smartphone-based Wireless Networks

Open Access
Freilich, Max Adam
Graduate Program:
Computer Science and Engineering
Master of Science
Document Type:
Master Thesis
Date of Defense:
July 09, 2013
Committee Members:
  • Guohong Cao, Thesis Advisor
  • John Joseph Hannan, Thesis Advisor
  • mobile computing
  • smartphones
  • ad hoc networks
  • data access
  • cooperative cache
  • 3G
The current generation of smartphones allows for the creation of novel applications that can take advantage of a variety of wireless communication interfaces. However, because many applications require internet connectivity, users must rely on cellular data networks using technologies like 3G. For some, 3G may be cost prohibitive or otherwise unusable. For those that do have 3G access, normal internet usage and web browsing may cause the 3G interface to incur significant delay and unnecessary energy consumption, degrading the user experience and shortening the battery life of the smartphone. To address these issues, nearby smartphones can be leveraged through ad hoc communication to work together to access data more energy and delay efficiently. Two hybrid data access schemes are proposed; in the first scheme, smartphones without 3G leverage cooperative cache-based ad hoc networking to request data from nearby smartphones that can access 3G. Not only can they access data without an active internet connection, but the data access delay is reduced through cooperative caching. In the second scheme, data requests of nearby 3G-enabled smartphones are forwarded to a single smartphone that performs the requests over its own 3G interface. By aggregating requests, this approach significantly reduces the average access delay and energy consumption among the smartphones in the cluster by reducing unnecessary tail energies and 3G network connection delays.