Layer of the Cell

Layer of the Cell

This parameter specifies the layer where a cell is located. The network designed by Huawei has four layers: Pico, Micro, Macro, and Umbrella, numbered 1-4 respectively.

The Pico layer is a microcell layer on the 900 MHz and 1800 MHz frequency bands. It meets the requirements for the provisioning of traffic at hot spots and dead zones.

The Micro layer is the main layer on the 1800 MHz frequency band. It solves the problem of frequency insufficiency. This layer is mainly used by dual-band MSs in the future.

The Macro layer is the main layer on the 900 MHz frequency band. It carries the most traffic.

The Umbrella layer provides a large coverage area on the 900 MHz frequency band. It implements the high-layer coverage and the connection of fast-moving MSs.

[1,4]

3

Layer

-

None

The network has four layers, numbered 1-4 respectively. If the number of the layer is small, the priority of the layer is high.

This parameter and Cell Priority determine the priority of a cell.

The priority affects the sequencing of neighbor cells for handovers. It also affects handover algorithms, such as PBGT handover algorithm and inter-layer handover algorithm.

For example, PBGT handovers can be performed only between the cells at the same layer and hierarchy. If a 1800 MHz cell and a 900 MHz cell are at different layers, a PBGT handover cannot be performed from the 1800 MHz cell to the 900 MHz cell. Consequently, handovers are performed slowly even if the speech quality is good.

3

Cell Priority

None

Parameters About Radio Resources

Network layer should be used with the cell priority to enable flexible network planning and optimization. Each layer can be configured with at most 16 priorities. From the perspective of traffic priority, if a cell has a low layer and priority, the priority is high. For details, refer to Cell Priority.