隨著5G時代的到來，用於5G前傳的承載網路正面臨挑戰，5G基站前傳需要高達10G或25 Gbps以上的頻寬，由於基站數量倍數增加，而基站的承載能力也對光纖基礎設施網路和部署成本帶來不小的壓力。

With the advent of the 5G era, the bearing networks for 5G fronthaul (5G fronthaul bearer networks) are facing challenges. 5G base station fronthaul requires a bandwidth of up to 10 or 25 Gbps, the number of base stations multiplies, and the bearing of base stations brings tremendous challenges to fiber infrastructure networks and deployment costs.