Huawei and LG Uplus to Deploy the World's First OTN for LTE-A CPRI Backhaul
Published on: 15th Apr 2014
Huawei says that it has won a contract to deploy a backhaul upgrade for South Korea's LG U that will improve its LTE A network performance.
Huawei will be using WDM/OTN technology for common public radio interface (CPRI) backhaul on LG UpLus's LTE-A network. The CPRI-over-WDM/OTN solution enables pooled baseband processing for distributed base stations, saving fiber resources and improving network reliability.
LG UpLus already extensively adopts pooled baseband processing for distributed base stations on its LTE-A network, to maximize bandwidth and spectrum efficiency, minimize interference caused by coverage overlap, and occupy less footprint. It is estimated that a centralized baseband processing pool in dense metropolitan areas should connect to over 100 remote radio units (RRUs). Traditionally, the RRUs are directly connected to the pool using fibers. This requires considerable fiber resources and does not allow service protection configurations.
Huawei's use of WDM/OTN technology for LTE backhaul means that only a single fiber pair is required to backhaul multiple CPRIs from RRUs to the baseband processing pool, greatly saving fiber resources. OTN ring protection for the CPRIs, which is based on unique delay compensation technology, enhances network reliability.
Additionally, OTN allows for accurate line performance monitoring and fault diagnosis.
"With the development of mobile broadband, high-speed WDM transport is no longer confined to the backbone. It has been extended to the metro core, and will be applied to the metro edge in the LTE-A era. LG UpLus and Huawei's innovation in LTE-A backhaul is a meaningful practice of WDM/OTN-to-the-edge," said Jack Wang, President of the Huawei transmission network product line.