Mobile Relay and Group Mobility for 4G WiMAX Networks
Relay is one of the key features being considered for IMT-Advanced systems. The relay architectures defined in IEEE 802.16m and 3GPP LTE-Advanced are optimized only for non-mobile relay, i.e., the Relay Station is attached to a designated Base Station and becomes a part of the fixed access network. A mobile relay architecture, where relay may switch attached BS according to operation demand, will promise more resilient relay deployment. In this paper, the authors first highlight three use cases where mobile relays can offer useful deployment options. Next, they propose an enhanced handover mechanism for relay-based group mobility by extending the IEEE 802.16m specification on relay.