Summary: In ACM SIGMOBILE Mobile Computing and Communications Review (MC2R) (invited paper), Volume 12, Issue 4 (October 2008).
Link-alike: Using Wireless to Share Network Resources
in a Neighborhood
Szymon Jakubczak David G. Andersen Michael Kaminsky Konstantina Papagiannaki Srinivasan Seshan
MIT CMU Intel Research Intel Research CMU
Asymmetric broadband connections in the home provide a limited upstream pipe to the
Internet. This limitation makes various applications, such as remote backup and sharing high
definition video, impractical. However, homes in a neighborhood often have high bandwidth
wireless networks, whose bandwidth exceeds that of a single wired uplink. Moreover, most
(wired and wireless) connections are idle most of the time.
In this paper, we examine the fundamental requirements of a system that aggregates
upstream broadband connections in a neighborhood using wireless communication between
homes. A scheme addressing this problem must operate efficiently in an environment that
is: i) highly lossy; ii) broadcast in nature; and iii) half-duplex. We propose a novel scheme,
Link-alike, that addresses those three challenges using opportunistic wireless reception, a
novel wireless broadcast rate control scheme, and preferential use of the wired downlink.
Through analytical and experimental evaluation, we demonstrate that our approach provides
significantly better throughput than previous solutions based on TCP or UDP unicast.
People are creating and sharing data in unprecedented