Based on 4.5G wireless communications technology, Huawei uses eLTE-Licensed networks for DA communications. eLTE-Licensed networks use industry-specific wireless frequency bands to provide users with high-bandwidth, low-latency power distribution automation services in non-line-of-sight (NLOS) scenarios. Currently, the TDD 1.8 GHz and TDD 400 MHz frequency bands are recommended. The major difference is that different products are used. The following figure uses the TDD 1.8 GHz frequency band as an example. Figure 2-1 shows the typical networking of the eLTE-Licensed network working on the TDD 1.8 GHz frequency band.
The eLTE-Licensed solution consists of three parts: application platform layer, network layer, and terminal layer. The core network, network management system (NMS), eNodeB, and customer-premises equipment (CPE) are main devices provided by Huawei. Other mapping devices, such as the DMS, Distribution Terminal Unit (DTU), and feeder terminal unit (FTU), are provided by partners.
