Fig. 13
From: The virtual small cells based on UE positioning: a network densification solution
UWB coverage extension. This figure represents the case where a relay from group g detects a relay belonging to group h. This means that there may be one hotspot instead of two. In such a case, relay from group g and h will compare their hops with their corresponding CH, and the one with less number of hops will change group. Automatically, all the UEs attached to the relay that just made a group change will belong to the new group too