The environment changes of the each part of the cooperative region are the key contexts for location-based collaboration. It’s important for users in different parts to have a spatial-fair opportunity to use shared resources such as communication channels in location-based collaborative system. So the floor control policy must consider the spatial fairness. Firstly, a floor quad-tree is put forward to record the spatial distribution of historical floor assignment and then floor index is constructed to judge the spatial priority of users’ floor requests. Secondly, a spatial fairness based floor sorting algorithm is proposed to sort the floor requests. Finally, a spatial fairness based fuzzy floor control policy is presented and verified by simulation. The conclusion is that the policy can reduce the spatial unfairness of floor-assignment times and longest-waiting time.
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