Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2007-09-18
2007-09-18
Pezzlo, John (Department: 2616)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S488000, C398S166000
Reexamination Certificate
active
10107876
ABSTRACT:
A method and apparatus for filtering data packets in a shared-medium or point-to-multipoint communications network. A filter unit is sent a data packet carrying a filter tag value in a packet addressed to the filter unit. The value is stored in the filter unit and subsequently received packets not addressed to the filter unit itself are forwarded only if they carry the stored filter tag. An embodiment of particular interest applies the method to Ethemet frames over a telecommunications access network (including optical or wireless networks), and uses the VLAN tag field to carry the filter tag information.
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Allen Matthew
Grant Michael
Phillips David
Unitt Brian
Barnes & Thornburg LLP
Nortel Networks Limited
Pezzlo John
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