Wake on wireless: an event driven energy saving strategy for battery operated devices
Proceedings of the 8th annual international conference on Mobile computing and networking
Reconsidering wireless systems with multiple radios
ACM SIGCOMM Computer Communication Review
Spray and wait: an efficient routing scheme for intermittently connected mobile networks
Proceedings of the 2005 ACM SIGCOMM workshop on Delay-tolerant networking
PeopleNet: engineering a wireless virtual social network
Proceedings of the 11th annual international conference on Mobile computing and networking
A community based mobility model for ad hoc network research
REALMAN '06 Proceedings of the 2nd international workshop on Multi-hop ad hoc networks: from theory to reality
ns2-MIRACLE: a modular framework for multi-technology and cross-layer support in network simulator 2
Proceedings of the 2nd international conference on Performance evaluation methodologies and tools
Blue-Fi: enhancing Wi-Fi performance using bluetooth signals
Proceedings of the 7th international conference on Mobile systems, applications, and services
MobiClique: middleware for mobile social networking
Proceedings of the 2nd ACM workshop on Online social networks
U-connect: a low-latency energy-efficient asynchronous neighbor discovery protocol
Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks
E-SmallTalker: A Distributed Mobile System for Social Networking in Physical Proximity
ICDCS '10 Proceedings of the 2010 IEEE 30th International Conference on Distributed Computing Systems
On Nodal Encounter Patterns in Wireless LAN Traces
IEEE Transactions on Mobile Computing
CrowdWatch: enabling in-network crowd-sourcing
Proceedings of the second ACM SIGCOMM workshop on Mobile cloud computing
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The recent surge in the use of mobile devices have opened up new avenues for communication. While most existing applications designed to exploit this potential are infrastructure based, there is a growing trend to leverage physical proximity between end-users to enable direct peer-to-peer communication. However, the success of these applications relies on the ability to efficiently detect contact opportunities, Devices that participate in such opportunistic communication often come equipped with multiple radios. For an individual node, performing neighbor discovery can be too expensive with a high-power, long-range radio (e.g., Wi-Fi). On the other hand, relying only on a low-power, short-range radio for detecting neighbors results in significantly fewer available contacts. To mitigate this problem, we have developed CQuest, a novel scheme for more efficient long-range neighbor discovery that leverages the clustering of nodes as well as the radio heterogeneity of mobile devices. The basic idea is that coordination over a low-power, short-range radio can help clustered nodes distribute the load of high-power, long-range scanning. We present results from extensive simulation that shows CQuest discovers significantly more contacts than a low-power only scheme but without incurring the high energy cost usually associated with long-range discovery. We also present results and experience from a successful implementation of the protocol on a testbed of Android G1/G2 phones that shows the feasibility of the protocol in a real network.