"WINNER II Channel Models", ver 1.1, Sept

WINNER II D1.1.2 V1.1
Figure 5-3: Handover scenario.
There are two base-stations or cells denoted c1 and c2, and one mobile station. 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. Path-loss will be determined according to the geometry and large-scale parameters
correlate properly. 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 to 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 same values of small scale parameters and restoring final
phases of the rays.
5. Simulate channel segments consecutively to emulate motion along the route.
It is also possible to model even more accurate time evolution between locations as described in
section 3.4. The clusters of current channel segment (location) are replaced by clusters of the next
channel segment one by one.
5.1.2.2 Multi-user
The handover situation from the previous section was an example of single-user multi-cell setup.
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 5-4.
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