Alex Kam Fung

20030223408, Dec 4, 2003

Mar 28, 2003

10/400465

Tsu-Wei Chen - Berkeley Heights NJ, US
Alex Fung - South Plainfield NJ, US
David Rosenblum - Orange CA, US
Ping-Fai Yang - Berkeley Heights CA, US

H04L012/66

370/352000, 370/401000

A method and apparatus provide for content-based routing of packets in a publish-subscribe network. A packet is received via the network. A map specifying computed filter coverage in an attribute space is accessed. Content of the packet is inspected for a routing decision for the packet. The map is used for the routing decision for the packet. The packet is routed based upon the inspected content of the packet and the map. A router for content-based routing of packets in a publish-subscribe network, comprising modules for performing this method is provided. A network including a plurality of such routers is provided. A computer-readable medium including instructions for performing this method is provided.

20040001498, Jan 1, 2004

Mar 28, 2003

10/400444

Tsu-Wei Chen - Berkeley Heights NJ, US
Alex Fung - South plainfield NJ, US
David Rosenblum - Orange CA, US
Ping-Fai Yang - Berkeley Heights NJ, US

H04L012/28

370/401000, 370/392000

A method and apparatus provide for propagating filters in a publish-subscribe network. A plurality of filters relating to subscriptions to content in the network are received. A number of the filters is reduced based upon particular criteria, and the reduced number of filters are propagated for use in satisfying the subscriptions. A filter receiving module, a filter reduction module, and a filter propagation module may execute these steps.

20030165139, Sep 4, 2003

Jul 19, 2002

10/199356

Tsu-Wei Chen - Berkeley Heights NJ, US
Alex Fung - South Plainfield NJ, US
Ping-Fai Yang - Berkeley Heights NJ, US

H04L012/28

370/392000

Packet routing via payload inspection at routers in a core of a distributed network. Packets include subjects and attributes in addition to routing information. The subjects correspond with particular types of content for subscriptions, and the attributes encapsulate the data or content. The routers store, process, and propagate filters corresponding with subscriptions to content. Upon receiving a packet, a router inspects the payload section of the packet containing the attributes in order to retrieve the subject and the attributes and apply them to the filters for the subscriptions. If an attribute satisfies a filter, the packet is routed to the next link. If the attributes do not satisfy the filters, the router discards the packet. These routing decisions are distributed among routers in the network core.