Patent ID: 7822036
Filing Date: 2010-10-26
Classification: H04L

Abstract:
1. A method for policy-based routing of a call between a first node and a second node in an asynchronous transfer mode (ATM) network, comprising: maintaining policy constraint indices for selected addresses in respective entries of an address translation table, the address translation table accessed by the first node of the ATM network to selectively translate attributes of calls based on respective addresses prior to transmission over the ATM network to the second node, the policy constraint indices pointing to respective policy constraints for routing calls between the first node and the second node; receiving a call setup attempt at the first node, wherein the call set up attempt is a setup message including entries for both a calling party and a called party; comparing the call setup attempt to the entries in the address translation table; determining whether the call setup attempt requires assignment of a policy constraint by checking for matches to the entries for at least one of the calling party and the called party in the address translation table and by presence of policy constraint indices associated with at least one of the calling party and the called party; and, when the call setup attempt requires assignment of the policy constraint, identifying the policy constraint associated with the policy constraint index, assigning the policy constraint to the call setup attempt, and routing the call between the first and second nodes by performing path selection based upon the assigned policy constraint.