Adaptive Design of mmWave Initial Access Codebooks using Reinforcement Learning
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866908618948870144 |
|---|---|
| author | Aroua, Sabrine Bovolis, Christos Anastasios Göransson, Bo Giovanidis, Anastasios Leconte, Mathieu Destounis, Apostolos |
| author_facet | Aroua, Sabrine Bovolis, Christos Anastasios Göransson, Bo Giovanidis, Anastasios Leconte, Mathieu Destounis, Apostolos |
| contents | Initial access (IA) is the process by which user equipment (UE) establishes its first connection with a base station. In 5G systems, particularly at millimeter-wave frequencies, IA integrates beam management to support highly directional transmissions. The base station employs a codebook of beams for the transmission of Synchronization Signal Blocks (SSBs), which are periodically swept to detect and connect users. The design of this SSB codebook is critical for ensuring reliable, wide-area coverage. In current networks, SSB codebooks are meticulously engineered by domain experts. While these expert-defined codebooks provide a robust baseline, they lack flexibility in dynamic or heterogeneous environments where user distributions vary, limiting their overall effectiveness. This paper proposes a hybrid Reinforcement Learning (RL) framework for adaptive SSB codebook design. Building on top of expert knowledge, the RL agent leverages a pool of expert-designed SSB beams and learns to adaptively select or combine them based on real-time feedback. This enables the agent to dynamically tailor codebooks to the actual environment, without requiring explicit user location information, while always respecting practical beam constraints. Simulation results demonstrate that, on average, the proposed approach improves user connectivity by 10.8$\%$ compared to static expert configurations. These findings highlight the potential of combining expert knowledge with data-driven optimization to achieve more intelligent, flexible, and resilient beam management in next-generation wireless networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_25271 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Adaptive Design of mmWave Initial Access Codebooks using Reinforcement Learning Aroua, Sabrine Bovolis, Christos Anastasios Göransson, Bo Giovanidis, Anastasios Leconte, Mathieu Destounis, Apostolos Networking and Internet Architecture Initial access (IA) is the process by which user equipment (UE) establishes its first connection with a base station. In 5G systems, particularly at millimeter-wave frequencies, IA integrates beam management to support highly directional transmissions. The base station employs a codebook of beams for the transmission of Synchronization Signal Blocks (SSBs), which are periodically swept to detect and connect users. The design of this SSB codebook is critical for ensuring reliable, wide-area coverage. In current networks, SSB codebooks are meticulously engineered by domain experts. While these expert-defined codebooks provide a robust baseline, they lack flexibility in dynamic or heterogeneous environments where user distributions vary, limiting their overall effectiveness. This paper proposes a hybrid Reinforcement Learning (RL) framework for adaptive SSB codebook design. Building on top of expert knowledge, the RL agent leverages a pool of expert-designed SSB beams and learns to adaptively select or combine them based on real-time feedback. This enables the agent to dynamically tailor codebooks to the actual environment, without requiring explicit user location information, while always respecting practical beam constraints. Simulation results demonstrate that, on average, the proposed approach improves user connectivity by 10.8$\%$ compared to static expert configurations. These findings highlight the potential of combining expert knowledge with data-driven optimization to achieve more intelligent, flexible, and resilient beam management in next-generation wireless networks. |
| title | Adaptive Design of mmWave Initial Access Codebooks using Reinforcement Learning |
| topic | Networking and Internet Architecture |
| url | https://arxiv.org/abs/2510.25271 |