Alcatel Lucent

Alcatel

Si Qing Zheng

Yijun Xiong

Dominique Verchere

John Blanton

Prasad N Golla

Marc L J Vandenhoute

Mei Yang

An ingress edge router () couples a set of input links () carrying packet information to a set of output links () carrying burst information. A plurality of input line cards () route information packets to one of a plurality of output line cards () associated with a desired output link () over a switching matrix (). The output line cards () assemble information packets into data bursts, generate burst header packets for respective data bursts, and transmit the data bursts and burst header packets on the output links (). The output line cards () include a plurality of burst processing units () for assembling data from the packets into data bursts, a plurality of transmitters () for transmitting data bursts on a respective channel of an output link and a switch () for passing bursts from a burst processing unit to a transmitter under control of a burst control unit ().

Optical edge router

A Parallel Round-Robin Arbiter (PRRA) system and method for arbitrating among N requesters. A plurality of leaf nodes that correspond to the N requesters form a directed ring of a hierarchical decision tree, wherein the leaf nodes are operable to propagate requests from the requesters. Each leaf node is provided with status logic operable to transmit its priority status for resolution of requests by the decision tree. Logic associated with the decision tree's nodes is operable to hierarchically resolve the requests propagated by the leaf nodes, wherein each leaf node is operable to transmit its grant to one of its immediate leaf node neighbors coupled to it via the directed ring for influencing the neighboring leaf node's priority status logic.

Parallel round-robin arbiter system and method

A system and method for implementing channel scheduling algorithms in an optical router wherein a scheduler operates pursuant to an algorithm and is capable of determining the availability of outbound data channels capable of carrying a data packet of duration B. The scheduler is further capable of selecting one channel from available data channels and assigning the data packet to the selected channel. The scheduler then updates state information of the selected data channel, but if no data channel is available to carry the data packet the data packet is dropped.

Hardware implementation of channel scheduling algorithms for optical routers with FDL buffers

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Plano, TX, United States of America

Si Qing Zheng