Patent ID: 8923140
Filing Date: 2014-12-30
Classification: H04L,H04M,H04W

Abstract:
1. A method for obtaining signalling information in a packet switched network, the method comprising: a first node generating a first request message for setting UP a test call during an established call between the first node and a second node in the packet switched network, the first request message comprising a first request for collecting signalling information; the first node sending the first request message towards the second node; the second node sending a call setup request message to the first node on receipt of the first request message for setting up the test call, the call setup request message comprising a trace request and trace information; routing the call setup request message between the first node and the second node via at least one third node in the packet switched network, the at least one third node adding signalling information relating to the third node to the trace information of the call setup request message; the first node receiving the call setup request message, the call setup request message comprising trace information added by any third node between the second node and the first node; wherein the call setup request message comprises additional signalling information added by another third node of the at least one third node, the another third node involved in the sending the first request message towards the second node; wherein the additional signalling information is collected by the another third node in response to the call setup request message.