Patent ID: 8948186
Filing Date: 2015-02-03
Classification: H04L

Abstract:
1. A method of operating a communication terminal as an originating terminal to originate a communication session with another communication terminal operating as an answering terminal, the method comprising: sending to the answering terminal an offer message communicating media capabilities available at the originating terminal and corresponding numbers of media streams; receiving from the answering terminal an answer message communicating at least one media capability selected from the media capabilities communicated in the offer message in accordance with the respective corresponding number of media streams communicated in the offer message; reserving the communicated media capabilities available at the originating terminal before sending the offer message so that no other answering terminal can obtain access to the reserved media capabilities until such reserved media capabilities are released; and releasing from reservation at the originating terminal any unselected media capability on receipt of the answer message communicating the selected at least one media capability.