Enabling D2D-based File Repair for enhanced Multimedia Broadcast Multicast Services in LTE

  • 王 珊晦

Student thesis: Master's Thesis


The 3rd Generation Partnership Project (3GPP) standardized enhanced Multimedia Broadcast Multicast Services (eMBMS) to provide an efficient multicast service for the distribution of multimedia content over LTE-Advanced (LTE-A) networks However data losses and corruption may occur as a result of channel fading Recovering these losses using the Unicast File Repair (UFR) method consumes a significant transmission power Recent studies showed that device-to-device (D2D) communications can be utilized to enhance the performance of multicast service Accordingly this study proposes a D2D File Repair (DFR) scheme for minimizing the repair cost of eMBMS transmissions In formulating the proposed scheme the problem of minimizing the D2D transmission cost is treated as an NP-complete source selection problem in which users having the correct file block are regarded as potential sources for D2D neighbors who do not The simulation results show that the DFR scheme consumes just 5%~30% of the power consumed by the UFR scheme To further reduce the DFR transmission cost a Multi-Source Selection with Neighbor Checking (MSSNC) algorithm is proposed for source selection It is shown that the DFR-MSSNC scheme reduces the D2D transmission cost by 6% compared to that of the DFR-greedy scheme
Date of Award2016 Jul 20
Original languageEnglish
SupervisorSok-Ian Sou (Supervisor)

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