A score-based packet retransmission approach for push-pull P2P streaming systems In this paper we propose an inference based packet recovery technique which considers past scores indicating retransmission success of the peers. Past scores are calculated by considering several parameters such as requested packets availability and round trip time. The importance of packets to be retransmitted is also considered in the proposed model. In order to obtain comparable results, we also implement a different retransmission approach similar to the models proposed in the literature. The ns3 simulations show that retransmission model increases the Peak Signal to Noise Ratio (PSNR) value even under high peer churn and limited resource index. Furthermore, score-based approach provides a decrease in reset counts and the number of duplicate packets, when it is compared to different retransmission approaches.