Alcatel Lucent

Alcatel-lucent USA Inc.

Olivier Klein

Robert Allen Novotny

Diana L Lorenz

Mark G Bradac

Greg Martin

Steven Craig Martin

Wayne R Wilcox

Jean-Francois Jamond

Arnaud Pierrard

Olivier Thomann

Emmanuel Froger

Jean-François Jamond

A device (D) is intended for processing digital data frames to be transmitted by a transport network (TN), and comprises i) a first processing means (PM) comprising ports for receiving digital data frames and arranged for downsizing, then compressing, if necessary, and then compacting each one of these received digital data frames to produce reduced digital data frames, ii) a second processing means (PM) arranged for aggregating at least some of these reduced digital data frames together according to aggregation information to produce frame groups, and iii) a third processing means (PM) arranged for grouping these frame groups together with a group descriptor, defining initial arrangements of the digital data frames, according to grouping information, to produce a transport frame to be transmitted by the transport network (TN).

Methods and device for processing digital data frames and transport frames for reduction of transport bandwidth

We disclose an interface device configured to inter-convert CPRI data frames and Optical Transport Units (OTUs). The interface device acquires frame synchronization by temporarily storing data in a buffer bank such that translated sync characters are placed at respective predetermined locations within the buffer bank. Each translated sync character represents, in the corresponding OTU, a respective sync character of a CPRI hyperframe. The interface device is configured to distinguish translated sync characters from payload-data words of identical value based on predetermined alignment, in the buffer bank, of data temporarily stored therein for conversion into the CPRI data format. The interface device advantageously enables multiplexing of a plurality of CPRI links and aggregation and encapsulation of the multiplexed CPRI data into a stream of OTUs for transmission to the intended destination over an Optical Transport Network.

Frame synchronization for data transmission over an optical network

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Antony, France

Olivier Klein