Frequency planning considers the requirements for the available bandwidth, capacity, and cell edge rate. The following frequency planning solutions are provided:
1) Intra-frequency mode
This mode provides the highest spectrum efficiency and applies to intra-frequency scenarios where the cell edge rate is achieved.
2) ICIC
This mode provides middle spectrum efficiency while ensuring the requirements for the cell edge rate and high cell center spectrum efficiency. In planar coverage, 1/3 of the spectrum bandwidth needs to be allocated to the cell edge. In linear coverage, half of the spectrum bandwidth needs to be allocated to the cell edge. This mode is usually used in scenarios with strong uplink interference and fewer UEs. In scenarios with a large number of UEs, the anti-interference performance of some UEs can be guaranteed.
3) Inter-frequency and full edge modes
The inter-frequency mode provides a low overall spectrum efficiency while ensuring better frequency isolation among cells and a high cell edge rate. The full edge mode provides an algorithm similar to inter-frequency scheduling in the DL when the ICIC mode cannot meet the requirements for frequency bandwidth allocation in linear coverage. The full edge mode provides good DL cell edge performance while ensuring the UL intra-frequency networking performance. This mode is usually used in scenarios with strong downlink interference and fewer UEs. In scenarios with a large number of UEs, the anti-interference performance of some UEs can be guaranteed.
