Evaluation on Multiple Video Streaming in IEEE 802.11e Multihop Networks

In the last decade, both customers and researchers paid attention to wireless video communications applications because they contain abundant and visual information. However, characteristics of wireless networks such as limited resource and fluctuated link quality degrade video transmission quality. In this paper, multiple video streaming in IEEE 802.11e multihop networks is evaluated under different conditions to find out how to design an adaptive cross-layer video transmission scheme for multistream transmission. On one hand, we compare the performances of multipath routing and single path routing. On the other hand, EDCA and its two modifications are evaluated to verify their flexibility. Evaluation results show that the performance of multi-stream video transmission depends on many factors, including data rates and coding structures of video sequences, traffic assignment mechanism, data rates of background data streams, etc.