Final report on link level and system level channel models - Winner

WINNER D5.4 v. 1.4
periods. Path-loss will be determined according to the geometry, large-scale parameters correlate
properly, but first-order bulk parameters change abruptly from a segment to segment. Thus, while there is
only one mobile station in the scenario, each location of the mobile on its path is assigned a unique label
ms1 to msM. This is equivalent to a scenario with multiple mobile stations at different positions ms1 to
msM. The resulting procedure is as follows.
1. Set base station c1 and c2 locations and array orientations according to geometry.
2. Set MS locations ms1 to msM and array orientations along the route. Choose the distance
between adjacent locations according to desired accuracy.
3. Set all the entries of the pairing matrix to 1.
4. Generate all the radio links at once obtain correct correlation properties. It is possible to generate
more channel realizations, i.e. time samples, for each channel segment afterwards. This can be
done by applying the initial values of small scale parameters in the Table 6.5.
5. Simulate channel segments consecutively to emulate motion along the route.
6.3.2 Interference
Interference situations are quite similar to handover situations, except that in this case the second BS
transmits a non-desired signal which creates interference. That doesn’t change the parameters of the
channel. What changes, however, is the degree of realism that is needed for the interference channel. This
has been discussed in Chapter 4.1.3.
6.3.3 Multi-cell and multi-user
The handover and interference situations from the previous sections were an example of single-user
multi-cell setups. Other cases of such a setup are for example found in the context of multi-BS protocols,
where a MS receives data from multiple BS simultaneously.
The extension to multiple users (and one or more base stations) is straightforward. Because location and
mobile station index are treated equivalently, it follows that all locations of all mobiles have to be
defined. Consider the drive-by situation in Figure 6.4.
Figure 6.4: Drive-by scenario (with multiple mobile stations).
Here, M locations of mobile station 1, and N locations of mobile station 2 are defined yielding a total of
M+N points or labels. The resulting procedure is as follows.
1. Set BS c1 and c2 locations and array orientations according to layout.
2. Set MS locations ms11 to ms2N and array orientations according to layout.
3. Set the links to be modelled to 1 in the pairing matrix.
4. Generate all the radio links at once obtain correct correlation properties. It is possible to generate
more channel realizations, i.e. time samples, for each channel segment afterwards. This can be
done by applying the initial values of small scale parameters in the Table 6.5.
5. Simulate channel segments in parallel or consecutively according to the desired motion of the
mobiles.
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