Coordination protocol for inter-operator spectrum sharing in co-primary 5G small cell networks

TL;DR

This paper proposes a low-overhead, non-cooperative spectrum sharing protocol for 5G small cell networks that uses a virtual currency and adapts to interference and load variations, improving spectrum utilization.

Contribution

It introduces a novel RAN-level coordination protocol for spectrum sharing among operators without monetary transactions, utilizing a virtual currency and reactive negotiation rules.

Findings

Protocol reduces signaling overhead.

Achieves better spectrum utilization in simulations.

Operates effectively without sharing channel state info.

Abstract

We consider spectrum sharing between a limited set of operators having similar rights for accessing spectrum. A coordination protocol acting on the level of the Radio Access Network (RAN) is designed. The protocol is non-cooperative, but assumes an agreement to a set of negotiation rules. The signaling overhead is low, and knowledge of competitor's channel state information is not assumed. No monetary transactions are involved; instead, spectrum sharing is based on a RAN-internal virtual currency. The protocol is applicable in a scenario of mutual renting and when the operators form a spectrum pool. The protocol is reactive to variations in interference and load of the operators, and shows gains in a simulated small cell scenario compared to not using any coordination protocol.