1. 5G network: https://en.wikipedia.org/wiki/5G
2. Martiradonna, M.S., Grassi, A., Piro, G., Boggia, G.: Understanding the 5G-air-simulator: a tutorial on design criteria, technical components, and reference use cases. Comput. Netw. 177, 1–4 (2020)
3. Hu, S., Chen, Q., Ma, H.: PDCP/RLC/MAC layer is responsible for LTE Layer 2 protocol to check QoS. New Communication Components Magazine. https://www.2cm.com.tw/2cm/zh-tw/magazine/-Technology/A64431A9FDDC48F4AFFFC99688A8743D
4. Hong, Z.: A Q-learning based downlink scheduling in 5G system, Master Thesis of Tunghai University, Taiwan (2021)