rving transmission point is different from the anchor transmission point, then the data need to be forwarded from the anchor transmission point to the serving transmission point. Figure 7.36 shows the transmission requirements for an offered bursty load of 10 Mbps Transmission requirements Average bandwidth 98% bandwidth Figure 7.36 Transmission requirements with DPS for an offered load of 10 Mbps per cell in a 3GPP macro case-1 deployment Small Cell Interference Management in a hexagonal-sectorized 3GPP macro case-1 deployment with an inter-site distance of 500 m. The average requirement is below 1 Mbps but it is more important to look at the worst-case requirements. The 98% requirement is 7.9 Mbps which is still very low compared to the cell peak data rate. The transport requirements tend to be lower for full buffer traffic because the load is more balanced compared to bursty traffic. Summary HetNet deployments bring a clear need for an efficient interference management since the small cell deployment will happen with less planning and with less optimization. This chapter illustrated the main features and their benefits. 3GPP has added a number of features in the latest releases for more efficient management of inter-cell interference. The features are summarized in Table 7.4. Release 8 allows avoiding inter-cell interference with frequency-domain CQI reporting and packet scheduling. That approach is called inter-cell interference coordination (ICIC). It is also possible to utilize signalling over X2 interface. The measurements show that the packet scheduler solutions can provide even 50% improvements in the cell edge data rates. Release 10 adds eICIC capability where the interference is managed in the time domain. eICIC is designed for HetNet deployments and requires base station synchronization, but the backhaul requirements are still low. eICIC can enhance median data rates by more than 50% and cell edge data rates by more than 100%. eICIC requires dynamic adaptation of the subframes and parameters depending