TRANSMISSION DEVICE

WIPO Patent Application WO/2010/055547

A1

With a transmission device that packetizes an SDH/SONET lower-order path, where the amount of data in the lower-order path contained in one frame, which is the unit of SDH/SONET transmission, is less than the minimum length of a MAC frame, the transmission efficiency will be poor when packetizing is performed based on one frame, which is the unit of SDH/SONET transmission. On the other hand, when multiple SDH/SONET frames are accumulated and then lower-order path information removed from multiple frames is multiplexed into the same packet to achieve better transmission efficiency during packetization, the delay for accumulating increases. Disclosed is a transmission device that packetizes an SDH/SONET lower-order path with timing which is an integer factor of 1 cycle of the SDH frame. In this case, the destination loads the same multiple lower-order paths in one packet. The result is that delay time accompanying lower-order path packetization is kept to less than the time of 1 cycle of the SDH frame, and the efficiency with which lower-order paths are accommodated in packets is further increased. The result is that improved transmission efficiency is realized.

NOGI YOSHIO (JP)
SHIBASAKI MASATOSHI (JP)
SAKAKIDA NAOHIRO (JP)
ASHI YOSHIHIRO (JP)
SAKAI KAZUTAKA (JP)

PCT/JP2008/003328

May 20, 2010

November 14, 2008

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HITACHI LTD (JP)
NOGI YOSHIO (JP)
SHIBASAKI MASATOSHI (JP)
SAKAKIDA NAOHIRO (JP)
ASHI YOSHIHIRO (JP)
SAKAI KAZUTAKA (JP)

H04L12/56; H04L47/43

JPH11145693A	1999-05-28
JPH08186576A	1996-07-16

POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)

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