Transwitch Corporation

Koen Deforche

Luc De Coster

Geert Verbruggen

Jan Olbrechts

A method buffering packets in a packet switching network (FIG.) includes receiving a packet from the network; splitting the packet into a plurality of PDUs; stripping at least some of the PDUs over a plurality of memory banks; () retrieving the PDUs from the memory banks: and at least temporarily storing the retrieved PDUs in the sequence they are to be transmitted. An apparatus for implementing the method is also disclosed.

Overcoming access latency inefficiency in memories for packet switched networks

The present invention provides a data-structure to store a search database and provides techniques to build this datastructure given a list of prefixes (P) and to search this database efficiently for a best matching prefix for an address D. The data-structure can be stored in standard memory (), where values are stored associated with memory address locations. The data structure includes representations of addressable linked tables (FIG.). The representations are related to a binary search trie (FIG.) and each linked table (T) has at least one entry. Entries in a table span more than one level of the binary search trie. The spanning feature relates to compression of a binary search trie into a finite number of levels (and hence tables). The finite number is less than the number of levels in the binary search trie. Hence the search algorithm is restricted to a finite, and predetermined number of search accesses to the tables to obtain a best-match result.

Efficient ipv4/ipv6 best matching prefix method and apparatus

A packet scheduling method and apparatus is described for enqueuing incoming data packets in sessions, and for storing the sessions in sequential order in service-groups. Each service-group is assigned a nominal service-interval in which time a data packet is to be transmitted, the nominal service-interval of one service-group being faster than the nominal service-interval of another service-group. Within one service-group, one session is serviced until the nominal service-interval of any of the service-groups where there is at least one data packet to be sent is exceeded.

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Roeselare, Belgium

Koen Deforche