Perform network planning for WiMAX in a rural mobile scenario.
WiMAX Standard and Definition
This is an example of the WiMAX air interface in a rural/suburban scenario for mobile
communications such as communication between base stations and vehicles. WiMAX
refers to the IEEE 802.16 standard - a family of wireless networks standards
formulated by the WiMAX forum. The IEEE 802.16e (mobile broadband wireless access)
Wimax standard is used in this model. WiMAX is similar to long-range Wi-Fi, but it
can enable usage at much greater distances.
Model Type
The geometry is described by topography (elevation) and clutter (land usage). The
database tree enables you to switch between the two displays. Figure 1. Topographical database.
Figure 2. Clutter database.
Sites and Antennas
There are six antenna sites in this scenario. Each site has three sector antennas at
a height of 25 m.
Tip: Click Project > Edit Project Parameter and click the Sites tab to view the sites,
antenna patterns, and carrier frequencies.
The carrier frequencies are set to frequencies around 3.5 GHz.
Air Interface
The air interface is defined by a WiMAX wireless standard
WiMAX_Sample_Rural_Mobile.wst file. In this model,
orthogonal frequency division multiple access (OFDM/SOFDMA) is selected under
multiple access schemes, and time division duplex (TDD) is used for duplex
separation (switching between uplink and downlink).
Tip: Click Project > Edit Project Parameter and click the Air Interface tab.
Computational Method
The computational method is selected on the Computation tab.
The dominant path model (DPM) was selected for the computation. The
method focuses on the most relevant path, which leads to shorter computation
times.
Results
Propagation results show at every location the power received by a hypothetical
isotropic receiver from each transmitting antenna. Propagation results also include
field strength and path loss. Results are calculated for a single prediction plane
at 1.5 m height.
The type of network simulation used is a static simulation (homogeneous traffic per
cell). The network simulation calculates cell area, site area, best server, and
maximum data rate for both downlink and uplink. The network simulation also
calculates the minimum required transmitter power, reception probability and SNIR
(max) for all modulation and coding schemes used in this model for both downlink and
uplink. Various network results for the defined modulation schemes can be viewed
from Results: Network in the tree.Figure 3. Maximum throughput in the downlink for receivers at 1.5 m height.
