MULTIPATH DELIVERY FOR ADAPTIVE STREAMING

摘要

The present invention relates generally to adaptive streaming and in particular to a method for delivering content via adaptive streaming technique over multiple communication paths and a device implementing the method. Thus, the present invention concerns a method for providing a content to be rendered at a client device CD comprising at least a first and a second communication interface CI1, CI2, wherein said first and second interface CI1, CI2 having a communication address, said content being accessible to the client device CD via at least a first and a second server interface SI1, SI2 having a communication address, a first path P1 being identified by the address of said first interface CI1 and the address of the first server interface SI1, a second path P2 being identified by the address of said second interface CI2 and the address of the second server interface SI2, said content being available under at least two versions having an encoding quality corresponding to a supported bit rate BRA, BRB constraint, each of said at least two versions being temporally split into chunks corresponding to an identical rendered duration of the content, a chunk being identified by a time index i and by one of the supported bit rate BRA, BRB. According to the invention the method comprises the steps of: - S1 measuring a first available bit rate BR1 on the first path P1 and a second available bit rate BR2 on the second path P2; S2 determining a requested bit rate RBR among the supported bit rate BRA, BRB from the measured first available bit rate BR1 and from the measured second available bit rate BR2; - S3 sending a first request via the first path P1 for receiving a first part of the chunk identified by the time index i and by the requested bit rate RBR and a second request via the second path P2 for receiving a second part of said chunk, said first and second part of the chunk being complementary; S4 receiving the requested first part via the first path P1 and the requested second part via the second path P2.