Method of monitoring calls in an internet protocol...

Details Method of monitoring calls in an internet protocol... Method of monitoring calls in an internet protocol...

2005-01-04

2005-01-04

Duong, Frank (Department: 2666)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

C370S356000, C370S389000, C370S392000, C370S401000, C379S007000

Reexamination Certificate

active

06839323

ABSTRACT:
A method of monitoring a call with a mobile terminal (MT) in an Internet Protocol (IP)-based network having a Gatekeeper that controls the network, a plurality of access routers that provide access to the network, and a Monitoring Station having monitoring facilities and a database of MTs to be monitored. When the MT sends an Admission Request message to the Gatekeeper, the Gatekeeper sends a query to the Monitoring Station asking whether the MT is to be monitored. The Monitoring Station sends a reply to the Gatekeeper indicating that the MT is to be monitored and providing an IP address where monitored packets are to be sent. The Gatekeeper then sends a monitoring request message to the access router associated with the MT. The request identifies the MT to be monitored, instructs the access router to monitor the MT, and provides a unique call identification (Call ID) and the IP address where monitored packets are to be sent. When the access router detects a packet associated with the MT, the router sends all packets associated with the MT to the Monitoring Station. The method also controls monitoring during intra-domain and inter-domain handoffs of the MT.

REFERENCES:
patent: 6078648 (2000-06-01), Albers et al.
patent: 6097798 (2000-08-01), Albers et al.
patent: 6445695 (2002-09-01), Christie, IV
patent: 6560224 (2003-05-01), Kung et al.
patent: 6563797 (2003-05-01), Kung et al.

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