Patent ID: 7558267
Filing Date: 2009-07-07
Classification: H04L

Abstract:
1. A method in a computer system for initiating a session with a restriction, the method comprising: receiving from an inviter an indication of a restriction on the session, the restriction restricting actions of an invitee to prevent unwanted users from viewing content of messages of the session; sending from the inviter to the invitee an SIP invite message inviting the invitee to participate with the inviter in the session with the restriction, the SIP invite message including an SDP attribute specifying the restriction on the session; receiving from the invitee a SIP response message indicating that the invitee will participate in the session and indicating whether the invitee will abide by the restriction on the session such that when the invitee agrees to abide by the restriction, the SIP response message includes the SDP attribute included in the SIP invite message, and when the invitee does not agree to abide by the restriction, the SIP response message does not include the SDP attribute; and when the SIP response message indicates that the invitee will participate in the session: