5.4.2 Interference control

28.6273GPPRelease 17RequirementsSelf-Organizing Networks (SON) Policy Network Resource Model (NRM) Integration Reference Point (IRP)Telecommunication managementTS

1. Uplink inter cell interference coordination

In this scenario, cell-edge UEs like UE A and B belong to different cell, and they are assigned the same physical resource block (PRB). When they transmit uplink messages, e.g. UE A sends message to its serving cell A, its neighbour cell B may also receives it; UE B has a similar situation. Therefore, cell A cannot judge which is signal-comes from UE A, and which is interference-comes from UE B, so as cell B. In this situation, inter cell interference coordination is essential to compensate for the system performance loss and increase cell edge users’ bit rate.

Figure 5.4.2-1: Uplink Inter Cell Interference Coordination

2. Downlink inter cell interference coordination

In this scenario, when UE located in cell-edge area, it is much adapted to suffer downlink interference from its neighbour cell in case that there is another UE occupying the same PRB in the same region belonging to its neighbour cell. So downlink inter cell interference coordination is essential to restrain interference and increase system capacity.

Figure 5.4.2-2: Downlink inter cell interference coordination