| Popis: |
The difference in link condition of broadcast/multicast users and the limitation of uplink resource, make it difficult to utilize adaptive modulation and coding (AMC) in the enhanced multimedia broadcast and multicast service (E-MBMS) network. To obtain the improvement of system throughput, this study proposes an adaptive modulation and coding scheme based on partial feedback, by which only partial users whose channel qualities are lower than the system threshold need to make a response to the modulation coding scheme (MCS) adaptation procedure. By this investigation, an adaptive scheme can be introduced in the E-MBMS network. Both the theoretical analysis and simulation results demonstrate the efficiency of the proposed strategy, in which the performance is close to the ideal one and has a significant throughput improvement when compared with that of the fixed MCS transmission scheme. |
