With the acceleration of 5G deployment, how to construct the 5G network in a cost-effective and efficient way has become a hot topic. In this situation, sharing the abundant infrastructure of FTTx networks can be an alternative option for the operators in the 5G era. For one thing, since the Sub-6GHz frequency band is leveraged in standalone networks, the number of required 5G macro cells will be huge, which is estimated to be 1.2 to 2 times of that in the 4G era. Coupled with the separated architecture of AAUs and DUs, fiber resources become pivotal to network deployment.