Patent ID: 8626849
Filing Date: 2014-01-07
Classification: H04L

Abstract:
1. A method at an intermediary server, between two end points exchanging media, the method comprising: receiving, at the intermediary server, a first re-INVITE message from a first end point of the two end points, wherein the first end point has a first session initiation protocol (SIP) dialog with the intermediary server having an associated ownership status, the first SIP dialog established using first session description protocol characteristics (SPD receiving, at the intermediary server, a second re-INVITE message from a second end point of the two end points causing a glare condition between the two end points, wherein the second end point has a second SIP dialog with the intermediary server having the same associated ownership status as the first SIP dialog, the second SIP dialog established using second session description protocol characteristics (SPD sending, from the intermediary server, a first 491 Request Pending message to the second endpoint in response to the received second re-INVITE message; receiving, at the intermediary server, a second 491 Request Pending from the second endpoint; initiating, at the intermediary server, a back-off period of time based on the ownership status of the second SIP dialog; and re-sending, from the intermediary server, the first re-INVITE message to the second end point after expiry of the back-off period of time.