![]() ![]() The main impact of the different CE levels is that the messages have to be repeated several times depending upon UE location. In order to balance and enhance the link budget, NB-IoT allows excessive repetitions up to repetitions in downlink, up to repetitions in uplink. Max coupling loss MCL for in-band and guard-band modes is not symmetrical and much below the target dB. The common perception that NB-IoT offers 20 db symmetrical link budget enhancement is not without a compromise. NB-IoT is centralized system like LTE, where identificare financiara apia controls the scheduling in downlink as well as in uplink, thus the need of symmetrical link budget. The choice of the deployment mode is critical, has impact on network dimensioning, QoS as well as total cost of ownership TCO.ĭeployment Mode impact on Coverage. It seems so, at least for next few years. The initial NB-IoT module seems to be targeting single frequency band e. On one hand, NB-IoT exhaustive band support offers flexibility to MNO based on spectrum availability while on the other hand, it may lead to market fragmentation. However, the list is growing, with so far band 11, 25, 31 and 70 had been added in Rel14 specifications. ![]()
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