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Link aggregation bundles multiple physical links on a single virtual link, enabling very high‐speed and large‐capacity data communications. It also enables redundant communications. Several link aggregation methods have been proposed. These methods utilize transport/or lower layer link aggregation. In this paper, a new application‐level link aggregation is proposed and implemented on Android operating system (OS), which is one of the popular OSs for mobile devices such as smartphones and tablet PCs. The proposed application‐level link aggregation method is verified with use of an implemented terminal. Copyright © 2012 John Wiley & Sons, Ltd.

This paper investigates the effects of speckle noise on analog video transmission systems using semiconductor laser diodes. The system linearity degradation due to speckle noise is examined using different fiber types. Then this paper proposes a new modulation technique employing a superimposed pulse scheme to reduce speckle noise.It is experimentally confirmed that the proposed modulation method is effective in reducing speckle noise. Based on the above investigations, analog video transmission experiments are performed using single-mode fibers, step-index multimode fibers, and graded-index multimode fibers in the 0.8 and 1.3 pm wavelength regions. The results of the transmission tests have confirmed the feasibility of analog video transmission using semiconductor laser diodes. Paper approved by the Editor for Transmission Systems of the IEEE Communications Societyfor publication without oral presentation.