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  N. B. Salem, L. Buttyán, J. P. Hubaux, M. Jakobsson
A Charging and Rewarding Scheme for Packet Forwarding in Multi-hop Cellular Networks
4th ACM Symposium on Mobile Ad Hoc Networking and Computing (MobiHOC 2003), 2003, June.

abstract  In multi-hop cellular networks, data packets have to be relayed hop by hop from a given mobile station to a base station and vice-versa. This means that the mobile stations must accept to forward information for the benefit of other stations. In this paper, we propose an incentive mechanism that is based on a charging/rewarding scheme and that makes collaboration rational for selfish nodes. We base our solution on symmetric cryptography to cope with the limited resources of the mobile stations. We provide a set of protocols and study their robustness with respect to various attacks. By leveraging on the relative stability of the routes, our solution leads to a very moderate overhead.