Intelligent Directional Paging Framework in Millimeter-Wave 5G NR Systems

The beamforming technique is applied in 5G NR systems to enhance the receiving signal power, especially for millimeter-wave communications. Beamforming complicates the paging procedure and brings extra overhead to the transmission of paging messages. In order to cover the serving area, the gNB should transmit broadcast control messages via beam sweeping. However, beam sweeping is inefficient for paging operation. In this work, an intelligent directional paging framework is proposed. The proposed beam-based paging list enables the gNB to page UEs flexibly. With the implicit gathering of the UE information, the gNB can make intelligent paging decisions without beam sweeping, decrease the paging resources consumption, and optimize the system paging delay. The proposed Markov chain based analytical model is validated by the simulation results. The results show that the proposed schemes outperform the NR baseline in successful paging rate, delay, and system capacity.