MPR Selection
, Basis: periodic HELLO messages, that contain information about
sender’s 1-hop neighbourhood allows receiver to collect
information about 2-hop neighbourhood
, Each node selects its own MPRs from its 1-hop symmetric
neighbours
, Through the MPRs all symmetric strict 2-hop neighbours must be
reached
, Recalculated when symmetric neighbourhoods change (1-hop or
strict 2-hop)