What Are Community Networks?

Community networks are communications networks built, owned, and operated by the people who use them, usually through a cooperative, association, or nonprofit rather than a commercial carrier. They provide local connectivity and, in most cases, shared access to the wider internet, and they are governed by their participants under rules the participants themselves set. The term covers a wide range of scales, from a village wireless mesh serving a few dozen households to federated networks with tens of thousands of active nodes.

The model has two lineages. One is the civic networking movement of the late 1980s and 1990s, when Free-Nets and community bulletin systems linked residents to local information and to each other, an early form of online social networking organized around place rather than around a platform. The other is the wireless networking community of the 2000s, which used cheap unlicensed-band radios and rooftop antennas to build infrastructure where commercial deployment was slow or absent. Contemporary community networks combine both threads: they are technical infrastructure projects and social institutions at once.

Ownership and Governance

What distinguishes a community network from a small internet service provider is who holds the infrastructure and who decides how it is run. Participants typically sign a commons license that lets anyone connect, extend the network, and use it, provided they accept the same obligations toward others. Costs are shared through membership fees, volunteer labor, and in-kind contribution of sites and equipment, and commercial activity is often permitted on the condition that revenue is reinvested. Analysis of the economic sustainability of the guifi.net community network documents how a compensation system that accounts for each participant's contribution and consumption allowed a volunteer project in Catalonia to grow past 27,000 nodes while supporting professional installers and service providers on the same infrastructure. Programs such as community-centered connectivity work at the Internet Society provide training, equipment, and policy support to groups following similar models in Africa, South Asia, and Latin America.

Technology and Architecture

Most community networks are wireless. Point-to-point links carry traffic between towers over several kilometers, and point-to-multipoint sectors or mesh clouds distribute it to homes, with fiber increasingly used for backbone segments where the community can afford it. Routing is a distinguishing technical problem, because nodes join and leave without central planning and link quality varies with weather and interference. Protocols developed in this setting, including OLSR, Babel, BMX6, and BATMAN, propagate topology information across the whole network and select paths from measured link metrics rather than administrative cost. Because the same infrastructure often hosts local services, work on service placement in community network clouds treats bandwidth between volunteer-contributed servers as the binding constraint when deciding where to run a shared application. Address allocation, peering with upstream transit providers, and monitoring are handled through community-run registries and dashboards.

Spectrum and Regulation

Regulatory treatment determines what these networks can build. Nearly all rely on unlicensed or lightly licensed spectrum, and shared-access frameworks, television white space rules, and simplified licensing for small operators materially change what is feasible in a given country. A policy brief on spectrum approaches for community networks argues for license classes proportionate to the size and risk of a deployment, since national licensing regimes designed for mobile operators impose fees and coverage obligations that a village association cannot meet. Universal service funds, infrastructure sharing rules, and the legal status of nonprofit operators are the other levers that regulators use.

Applications

Community networks are used for a range of purposes, including:

• Rural and remote broadband access where commercial deployment is uneconomic
• Affordable urban connectivity in underserved neighborhoods
• Local services such as voice, file sharing, video, and cached content
• School, clinic, and municipal connectivity in low-income regions
• Disaster response and resilient backup communications
• Research testbeds for wireless mesh routing and distributed systems