Cooperative NetworkCoded Multicast for Layered Content Delivery in D2DEnhanced HetNets The rapid growth in multimedia applications over cellular networks calls for multicast services. Multicast is an efficient means of delivering contents to multiple users while efficiently utilizing network resources. Layered streaming, e.g., scalable video coding (SVC) provides an excellent solution to handle channel diversities in wireless multicast. This paper presents a cooperative multicast scheme for scalable video content delivery in D2Denabled heterogeneous cellular networks (HetNets). To extend the multicast service beyond base stations (BSs), D2D links are used to help relay content for cellular multicast. Network coding (NC), implemented through random linear network coding (RLNC) with unequal error protection (UEP) is incorporated in layered contents to enhance reliability and throughput. This paper tries to optimize the multicast scheduling procedures, aiming to assign the optimal modulation and coding schemes (MCSs) for transmissions. The constraints on cache size, backhaul capacity and channel fading are comprehensively considered. Besides, this paper also presents a interferenceaware approach for D2D link selection in order to further improve the cooperative multicast. Sufficient numerical results have demonstrated the improvement brought by the proposed scheme significantly on the content delivery efficiency as well as quality of experience (QoE).

Network Coded Cooperative Multicast in Integrated TerrestrialSatellite Networks Wireless services have been extended from connectioncentric to contentcentric and this brings rapid increasing data traffic. Considering the concurrent multiple requests for popular contents, multicast is a promising delivery scheme to exploit content reuse. Satellite multicast is superior to others due to the coverage. When terrestrial base stations (BSs) are integrated with the satellite, cooperative transmission is then enabled to handle the fading satellite channels as well as maximize data throughput. Therefore, this paper proposes a cooperative multicast scheme for content delivery in the integrated terrestrialsatellite networks (ITSN) which is further enhanced by network coding. To exploit bandwidth of both terrestrial base stations (BSs) and the satellite, this cooperative multicast scheme uses twophase transmission. The satellite multicast contents to subscribers in an opportunistic manner with realtime data rate adaptation. Then terrestrial BSs retransmit the lost packets for reliable transmission. Ground users are allocated to subgroups for the channel diversities while network coding is applied to packet loss recovery with fewer retransmissions. Sufficient numerical results demonstrate the enhancement on network throughput brought by the cooperative multicast scheme.