The spectrum access system (SAS) designated by the FCC follows a centralized server-client model where a spectrum user registers with one SAS service provider for spectrum allocation and other spectrum management functions. This model, however, is vulnerable to adversarial influence on individual SAS servers, causing concerns over system reliability and trustworthiness, especially when the ecosystem embraces a growing base of SAS service providers and heterogeneous user requirements. In this paper, we propose a blockchain-based decentralized SAS architecture called BD-SAS to provide SAS services securely and efficiently, without assuming trust in individual SAS servers. BD-SAS is backward compatible with the existing SAS infrastructure and supports the automatic execution of key spectrum management functions. A global blockchain network (G-Chain) is used for spectrum regulatory tasks while localized blockchain networks (L-Chains) are instantiated in individual spectrum zones for automating spectrum access assignment and other spectrum management activities. To further achieve security against an adaptive adversary, BD-SAS integrates a SAS server reshuffle scheme to resist adaptive corruptions on individual SAS servers. We implemented a BD-SAS prototype with practical blockchain platforms. Evaluation results demonstrate the feasibility and responsiveness of our system, wherein a spectrum access assignment can be finalized at the level of seconds.
|Number of pages||15|
|Journal||IEEE Transactions on Cognitive Communications and Networking|
|State||Published - Aug 1 2023|
Bibliographical noteFunding Information:
This work was supported in part by the U.S. National Science Foundation under grants 1916902, 1916926, 2154929, and 2154930, the Army Research Office under grant W911NF- 20-1-0141, and a gift from InterDigital. A preliminary version of this work has appeared as Chapter 6 in Yang Xiao's Ph.D.
© 2015 IEEE.
- Radio spectrum management
- distributed information systems
- dynamic spectrum access
- fault tolerance
ASJC Scopus subject areas
- Artificial Intelligence
- Hardware and Architecture
- Computer Networks and Communications