Experimental assessment of media synchronization quality in IEEE 802.11 b under Bluetooth interference

This paper assesses the media synchronization quality of audio-video transmission over the IEEE 802.11b wireless LAN under Bluetooth interference by experiment. In this situation, the temporal constraints of audio and video may be disturbed, since the Bluetooth interference cause delay jitter due to retransmission and carrier sensing in the MAC layer of IEEE 802.11b. In the experiment, a media server transfers stored video and audio streams to a mobile terminal over an IEEE 802.11b wireless LAN; as radio interference from Bluetooth, two other terminals transmit data over Bluetooth at the same time. We examine the influence of Bluetooth on the audio-video transmission over IEEE 802.11b in terms of the Bluetooth signal level and its data load. We also apply a media synchronization control scheme and confirm its effectiveness.