ISAC-Enabled Non-Terrestrial Networks for 6G: Design Principles, Standardization, Performance Tradeoffs, and Use Cases

2026-04-13

AI Summary

This work proposes an integrated sensing and communication (ISAC)-enabled design paradigm for non-terrestrial networks to address critical challenges in sixth-generation (6G) space-air-ground integrated networks, including severe Doppler effects, interference, and latency. By establishing a unified ISAC architecture, the study jointly optimizes sensing and communication performance while systematically incorporating Doppler compensation, interference management, and standardized interface mechanisms. The research elucidates the key technical advantages of ISAC in non-terrestrial environments, leverages representative application scenarios and case studies to uncover fundamental challenges, and clarifies the associated performance trade-offs and standardization pathways. This contribution provides both architectural innovation and theoretical foundations to support ubiquitous intelligent connectivity in 6G networks.

Technology Category

• Planning, Routing, and Scheduling: Optimization of Spatio-temporal Systems
• Search and Optimization: Non-convex Optimization
• Application Domains: Internet of Things, Sensor Networks & Smart Cities

Application Category

• Systems and Infrastructure for Web, Mobile and WoT: Novel mobile and WoT systems, and system-of-systems
• Social Networks and Social Media: Social media analysis through the lenses of networks
• Security and Privacy: Large-scale security measurements

Abstract

Non-Terrestrial Networks (NTN) have emerged as a key enabler to fully realize the vision of integrated, intelligent, and ubiquitous connectivity in 6G systems. However, several operational challenges, including severe Doppler effects, interference, and latency, hinder the seamless integration of NTN and Terrestrial Networks (TN). In this context, Integrated Sensing and Communication (ISAC), which unifies sensing and communication functionalities within a common framework, offers great potential to address these challenges while enabling new network capabilities. Due to its complementary functionalities, ISAC can play a pivotal role in enhancing NTN performance, although its practical adoption requires a fundamental rethinking of existing architectural and standardization frameworks. Motivated by this need, this article examines key aspects of ISAC-enabled NTN, including architectural design principles, application scenarios, standardization challenges, and key performance tradeoffs. Finally, a representative case study is presented to illustrate major technical challenges and highlight promising future research directions for ISAC-enabled NTN.

Problem

• Non-Terrestrial Networks
• Integrated Sensing and Communication
• 6G
• Doppler effects
• network integration

Innovation

• Integrated Sensing and Communication (ISAC)
• Non-Terrestrial Networks (NTN)
• 6G
• Doppler mitigation
• Network integration