A method of negotiating the sharing of a cost associated with a communication service between a plurality of participants. The method comprises sending a cost sharing request from a terminal 1 used by a first of the participants to the terminal 12,13 used by the or each other participant At the or each...http://www.google.com/patents/US20060056607?utm_source=gb-gplus-sharePatent US20060056607 - Cost negotiation for communication sessions
