Urban Communication, 802.11b with IRT

The network planning of a local area network in an urban scenario is investigated. The intelligent ray tracing model (IRT) method is used.

Sites and Antennas

Five omnidirectional antennas are placed at different sites. They use three different carrier frequencies around 2.4 GHz. All the antennas are placed at a height of 15 m.
Tip: Click Project > Edit Project Parameter and click the Sites tab to view the sites and antennas.
Open the Edit Project Parameter dialog and click the Sites tab for details.

Air Interface

The wireless local area network (WLAN) air interface is defined by the 802.11b wireless standard (.wst) file. CDMA/WCDMA/HSPA (code division multiple access) is selected for multiple access. In this model, time division duplex (TDD) is used for duplex separation, which is switching between uplink and downlink.
Tip: Click Project > Edit Project Parameter and click the Air Interface tab to view the carriers and transmission modes.

Computational Method

The computational; method, 3D: Rigorous IRT (Intelligent Ray Tracing), is selected. This prediction method results in high accuracy, and due to the preprocessing of the database, requires a short computation time.
Tip: Click Project > Edit Project Parameter and click the Computation tab to change the model.


Propagation results show at every location the power received from each transmitting antenna.

The type of network simulation used is a static simulation (homogeneous traffic per cell). The network simulation calculates the maximum received power, Eb/N0 (max) and maximum achievable Ec/(N0+I0) for all modulation and coding schemes used in this model for both downlink and uplink.

Figure 1 shows the maximum achievable data rate for communication with this wireless standard in this model.

Figure 1. Maximum achievable data rate.