世界发展银行-No-Broken-Link-_-The-Vulnerability-of-Telecommunication-Infrastructure-to-Natural-Hazards_42页_1mb

Summary of "No Broken Link: The Vulnerability of Telecommunication Infrastructure to Natural Hazards"

Core Content

This document examines the vulnerability of telecommunication infrastructure to natural hazards, emphasizing the critical role of digital infrastructure in the global economy and the need for resilience against climate risks. It explores the economic and operational significance of digital infrastructure, particularly in enabling digital transformation, international trade, and public service delivery. The report also outlines the physical components of the digital world and how they are susceptible to various climate events, such as floods, earthquakes, and sea level rise.

Main Points

1. Economic Importance of Digital Infrastructure

• The global economy is increasingly digital, with the internet and ICTs playing a central role in daily operations of individuals, businesses, and governments.
• Digital infrastructure is a key enabler of productivity, economic mobility, innovation, and access to markets.
• The global digital economy was valued at $11.5 trillion in 2016, equivalent to 15.5% of global GDP, and is projected to grow to 25% within a decade.
• Broadband access is expanding, with over 4 billion individuals connected globally, and the volume of data traffic is expected to increase significantly.

2. Physical Foundations of the Virtual World

• The global digital infrastructure is built on a combination of networked infrastructure (cables, towers, antennas) and nodes (datacenters, IXPs, landing stations).
• Networked Infrastructure includes:
  • Submarine cables: Over 1.2 million km of submarine cables connect continents and islands.
  • Terrestrial cables: Over 13.7 million km of terrestrial cables link population centers.
  • Wireless infrastructure: Approximately 4 million mobile towers provide last-mile connectivity.
• Nodes include:
  • Datacenters: House IT and telecom equipment, with over 400 hyperscale datacenters globally.
  • Internet Exchange Points (IXPs): Over 900 IXPs facilitate multilateral connectivity and reduce costs.
  • Landing stations: Critical for connecting submarine cables to terrestrial networks.

3. Climate Impact on Digital Infrastructure

• Climate events such as earthquakes, floods, tsunamis, and sea level rise pose significant risks to both networked infrastructure and nodes.
• Submarine cables are particularly vulnerable to earthquakes and tsunamis, especially near-shore systems.
• Landing stations and datacenters are at high risk from floods, given the concentration of electronic equipment.
• Sea level rise threatens the long-term viability of submarine cable landing stations.
• Terrestrial cables and antennas are also affected, with varying degrees of vulnerability depending on location and construction.

4. Resilience and Redundancy

• The resilience of digital infrastructure can be improved through redundant network design and diverse ownership models.
• Private sector-led infrastructure development requires balancing upfront investment in resilience with cost recovery after disasters.
• Redundancy is a key strategy for mitigating the impact of disruptions, especially in densely wired regions with multiple transmission paths.

5. Value Chain Impacts

• The broadband value chain is divided into three segments:
  • First Mile: International connectivity via submarine cables and cross-border terrestrial links.
  • Middle Mile: Domestic connectivity infrastructure linking international routes to population centers.
  • Last Mile: Infrastructure connecting individuals and premises to the network (e.g., fiber to the home, mobile towers).
• Disruptions in any segment can have system-wide effects, impacting overall connectivity, service quality, and economic activity.

6. Recommendations

• Public and private sectors should collaborate to enhance the resilience of digital infrastructure.
• Governments and regulators can play a role in promoting resilient design, risk-sharing, and coordination.
• Investment in critical infrastructure, such as submarine cables and landing stations, should be prioritized to ensure continuity and security.
• Disaster recovery efforts must be supported by robust and resilient communication networks.

Key Information

• Global internet users: Over 4 billion individuals are connected to the internet, with data traffic increasing rapidly.
• Submarine cables: Over 370 systems globally, with disruptions causing significant economic and operational impacts.
• Datacenters: Hyperscale datacenters are essential for global IT companies, housing large volumes of data and enabling services.
• Climate risks: Earthquakes, floods, and sea level rise are the most significant threats to digital infrastructure.
• Resilience strategies: Redundancy, infrastructure sharing, and public-private collaboration are critical for mitigating climate risks.

Conclusion

Telecommunication infrastructure is vital to the functioning of the global economy and public services, yet it remains highly vulnerable to natural hazards. While technological choices and network design can enhance resilience, the distributed ownership model of the ICT sector presents challenges for coordinated disaster preparedness and recovery. Governments and regulators must play an active role in ensuring that digital infrastructure is both resilient and affordable, particularly in the face of increasing climate risks.