IEEE 802.21 aims for seamless handover
across heterogenous networks, reducing disconnection
times and packet loss during handover
of real-time communications. LTE-coordinated
multipoint (CoMP) has been proposed by the
Third Generation Partnership Project (3GPP)
standards community [8] to take care of seamless
connectivity for edge users and handovers in
4G networks. In LTE-CoMP the edge users are
also supported by multiple neighboring base stations,
therefore giving more diversity to the data
received. When edge users cross a cell during
chat, with LTE-CoMP they will still be supported
by adjacent base stations and hence not experience
video freeze due to handover delay.