Mobile users in an ultra-dense millimeter-wave cellular network experience handover events more frequently than in conventional networks, which results in increased service interruption time and performance degradation due to blockages. Multi-connectivity has been proposed to resolve this, and it also extends the coverage of millimeter-wave communications. In this paper, we propose a dual-connection based handover scheme for mobile UEs in an environment where they are connected simultaneously with two millimeter-wave cells to overcome frequent handover problems. This scheme allows a mobile UE to choose its serving link between the two mmWave connections according to the measured SINRs and then the corresponding base stations may forward duplicate packets to the UE. We compare our dualconnection based scheme with a conventional single-connection based scheme through ns-3 simulation. The simulation results show that the proposed scheme significantly reduces handover rate and delay. Therefore, we argue that the dual-connection based scheme helps mobile users achieve performance goals they require in ultra-dense cellular environments
- Seongjoon Kang, Siyoung Choi, Goodsol Lee, and Saewoong Bahk, https://arxiv.org/pdf/2107.04526.pdf
- This paper is published in IEEE Globecomm 2019
To confirm some results, put the bellow commands ./waf --run "scratch/mc-downlink -buildingTopology=building_topology.txt -nPacket=7142"
You can change the building density by text file, "building_topology.txt", which has 4000 blockages/𝑘𝑚^2. The parameter, nPacktet, indicates the number of packets consisting of one file, and each packet size is 1400 byte.