Information-theoretic formulations of the private information retrieval (PIR) problem have been investigated under a variety scenarios. Symmetric (SPIR) is variant where user able to privately retrieve one out K messages from N non-colluding replicated databases without learning anything about remaining K-1 messages. However, goal perfect privacy can be too taxing for certain applications. In t...

Asymmetric links are common in wireless networks for a variety of physical, logical, operational, and legal considerations. An asymmetric link supports unidirectional communication between a pair of mobile stations and requires a set of relay stations for the transmission of packets in the other direction. We evaluate m-limited forwarding, a technique to disseminate information in locationand p...