On some challenges and design choices in ad-hoc communications

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Abstract
Ad-hoc networks are network architectures that can b e rapidly (ideally immediately) deployed an d that do not need to rely on pre-existing infrastructure. The salient feature of this breed of networks is that they can operate in d ifferent and differing propagation and network operational conditions, which cannot be predicted during the network design stage. In this position p aper, we discuss s ome of the c hallenges and choices that need to be made while designing an ad-hoc network. In particular, we address the following three issues: hierarchical vs. flat network architectures, proactive v s. reactive (on d emand) routing p rotocols vs. a h ybrid approach, and sensing-based vs. dialog-based medium access control.

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