Patent ID: 7027434

Claim:
A method of a real time data communication between a first user of a source and a second user of a destination at least partly via a real time data transport protocol over Internet Protocol communication network, said method comprising: transmitting by said source at least two packets to said destination; and determining by said destination for each one of said at least two packets, time information related to a receiving time of said packet, wherein said method further comprises: applying by said source, for each one of said at least two packets, a predefined packet length out of a plurality of packet lengths; determining, according to said time information and according to each said predefined packet length, characteristics of a first relation between a packet length of a packet to be transmitted from said source to said destination and a source to destination delay which is a time period between said transmission of said packet by said source and reception of said packet by said destination; determining a preferred mouth to ear delay according to a preferred quality rating for said real time data communication; and determining an optimal packet length for said preferred mouth to ear delay and according to said characteristics of said first relation for packets being transmitted during said real time data communication.