Multicast communications system with mechanism for updating...

Details Multicast communications system with mechanism for updating... Multicast communications system with mechanism for updating...

2007-09-11

2009-10-27

Patel, Jayanti K (Department: 2419)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S432000

Reexamination Certificate

active

07609694

ABSTRACT:
A multicast communications system that updates multicast trees in a reliable way to prevent transmitted packets from being dropped or reversed before they reach their destinations. When a transmitting device sending multicast packets has moved from an initial access point to a new access point, a trigger data generator produces and sends trigger data to a network control server. This trigger data includes a sequence number of a particular packet as a trigger condition that initiates a change from an initial multicast tree to a new multicast tree. A trigger data distributor then sends the trigger data to both the initial and new access points. In packet routing devices, an update processor maintains the initial multicast tree until a packet having the sequence number specified in the trigger data is received and forwarded. After that, the update processor replaces the initial multicast tree with the new multicast tree.

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C. Janneteau et al. “Comparison of Three Approaches Towards Mobile Multicast” IST Mobile Summit 2003, Portugal, Jun. 2003.

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