Abstract
Space–air–ground–sea integrated (SAGSI) networks are envisioned to connect satellite, aerial, ground, and sea networks to provide connectivity everywhere and all the time in sixth-generation (6G) networks. However, the success of SAGSI networks is constrained by several challenges including resource optimization when the users have diverse requirements and applications. We present a comprehensive review of SAGSI networks from a resource optimization perspective. We discuss use case scenarios and possible applications of SAGSI networks. The resource optimization discussion considers the challenges associated with SAGSI networks. In our review, we categorized resource optimization techniques based on throughput and capacity maximization, delay minimization, energy consumption, task offloading, task scheduling, resource allocation or utilization, network operation cost, outage probability and the average age-of-information, joint optimization (data rate difference, storage or caching, CPU cycle frequency), the overall performance of network and performance degradation, software-defined networking, and intelligent surveillance and relay communication. Finally, we discuss challenges and future research directions in SAGSI networks.
Original language | English |
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Article number | 103647 |
Journal | Journal of Network and Computer Applications |
Volume | 215 |
DOIs | |
State | Published - Jun 2023 |
Bibliographical note
Publisher Copyright:© 2023 Elsevier Ltd
Funding
We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC) .
Funders | Funder number |
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Natural Sciences and Engineering Research Council of Canada |
Keywords
- 6G
- Aerial networks
- Integrated networks
- Maritime networks
- Resource optimization
- SAGSI networks
- Terrestrial networks
ASJC Scopus subject areas
- Hardware and Architecture
- Computer Science Applications
- Computer Networks and Communications