Dynamic open spectrum sharing MAC protocol for wireless ad hoc networks

TLDR

The legacy static spectrum allocation leads to very low utilization and leaves little bandwidth for emerging wireless applications. The paper proposes the dynamic open spectrum sharing (DOSS) MAC protocol to allow unlicensed users to access spectrum while coexisting with legacy systems. The DOSS MAC protocol lets nodes adaptively select any available spectrum, is theoretically analyzed and evaluated by simulation, and incorporates a radio receiver design. It delivers real‑time dynamic allocation, high spectrum utilization without infrastructure, and coexistence with legacy systems while mitigating hidden and exposed terminal problems.

Abstract

In legacy wireless communication systems, spectrum allocation is static, resulting in extremely low spectrum utilization. On the other hand, there is little spectrum left for allocation to an increasing number of emerging wireless applications. A promising approach to solving this paradox is opening up most of the spectrum for unlicensed spectrum users in ways that co-exist with legacy users. Following this direction, this paper proposes the dynamic open spectrum sharing (DOSS) MAC protocol. This protocol allows nodes to adaptively select an arbitrary spectrum for the incipient communication subject to spectrum availability. It offers real-time dynamic spectrum allocation and high spectrum utilization without relying on any infrastructure. It also coexists with legacy wireless applications, while avoiding the hidden and exposed terminal problems. We conduct theoretical analysis of the protocol, and study its performance via simulations. In addition, we covers the radio receiver design