Researching | Routing Load Balancing Based on Satellite‑Ground Hybrid Traffic Detour in Low‑Earth Orbit Satellite Optical Networks

Acta Optica Sinica, Volume. 45, Issue 8, 0806003(2025)

Routing Load Balancing Based on Satellite‑Ground Hybrid Traffic Detour in Low‑Earth Orbit Satellite Optical Networks

Jiahao Zou, Yang Cao^*, Xiaofeng Peng, Yunxiang Gao, Jing Zuo, and Fen Chen

Author Affiliations

School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054, China

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Figures&Tables (12)

References (23)

Paper Information

Figures & Tables(12)

Fig. 1. LOSN scene model

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Fig. 2. Flow of DMRA-SGT algorithm

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Fig. 3. 288/12/24 constellation model structure

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Fig. 4. Orbits of satellites in polar-orbiting satellite network

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Fig. 5. Traffic factor allocation ratio under different shortest path occupied statuses

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Fig. 6. Average TBRs of different total business volumes

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Fig. 7. Average packet loss rates of different total business volumes

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Fig. 8. Total throughputs of different total business volumes

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Table 1. RALB algorithm flow

Table 1. RALB algorithm flow

RALB

Input： Current time’s topology

G = (V, E)

， capacity

C

， set of service requests

D

， and available bandwidth

B_{a}

Output： Set of service paths

P (D)

and updated available bandwidth

B_{a}

1. Set $P (D)$ = ${e m p t y}$ ；

2. For each $d \in D$ ， in sequential order：

3. Set $p = {e m p t y}$ ； # $p$ is the arrival path， which is initially empty

4. If $(v_{i} \in V & v_{j} \in V)$ == true， then：

5. For each $e_{i j} \in E$ in sequential order：

6. If $B_{e} \leq B_{d}$ ， then： # $B_{e}$ is the link $e_{i j}$ available bandwidth， $B_{d}$ is the link $e_{i j}$ service demand bandwidth；

7. Remove $e$ from $B_{a}$ and $C$ ；

8. End

9. End

10. Set the weight set $W$ based on $C - B_{a}$ ；

11. $p = D i j k s t r a (W, v_{i}, v_{j})$ ；

12. If $p$ is empty == true， then：

13. Service request $D$ is blocked；

14. Else： Allocate bandwidth for the path $d$ ；

15. For each $e_{i j} \in p$ ；

16. $B_{e} = B_{e} - B_{d}$ ；

17. End；

18. End；

19. Else；

20. In this topology $s$ ，service request $d$ is blocked；

21. End；

22. $P (D) = P (D) ⋃ p$ ；

23. End

Table 2. Next hop status
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Table 2. Next hop status
Local queue status Adjacent satellite status
$N$ $B$
$N$ Support Not support
$B$ Not support Not support

Table 3. Hop selection rule
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Table 3. Hop selection rule
Best hop Detour hop
Support Not support
Support Best hop Best hop
Not support Detour hop —

Table 4. Simulation parameters

Table 4. Simulation parameters

Parameter	Value
Satellite orbital altitude /km	1400
Number of satellite orbits	12
Number of satellites per orbit	24
Orbital inclination /（°）	90
Transmission rate /（Gbit/s）	5
ISL link capacity /（Gbit/s）	10
Satellite-ground link capacity /（Gbit/s）	20
Number of ground stations	16
Simulation time /s	3600
Total traffic /（Tbit/min）	5‒10

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Jiahao Zou, Yang Cao, Xiaofeng Peng, Yunxiang Gao, Jing Zuo, Fen Chen. Routing Load Balancing Based on Satellite‑Ground Hybrid Traffic Detour in Low‑Earth Orbit Satellite Optical Networks[J]. Acta Optica Sinica, 2025, 45(8): 0806003

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Paper Information

Category: Fiber Optics and Optical Communications

Received: Nov. 21, 2024

Accepted: Feb. 17, 2025

Published Online: Apr. 14, 2025

The Author Email: Yang Cao (caoyang@cqut.edu.cn)

DOI:10.3788/AOS241780

CSTR:32393.14.AOS241780

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