In this paper, we present a modification of the ns2 code for the

RTP/RTCP protocols. The legacy RTP/RTCP code in ns2 has not

yet been validated but it provides a fr a mework of the protocol’s

specification for experimental use. We have modified the code by

adding all the RTP/RTCP protocol’s attributes that are defined in

RFC 3550 and related to QoS metrics. We have also

implemented additional algorithms and functions in order to

enhance our modified code with TCP friendly bandwidth share

behavior. Our protocol, named RTPUP (“UP” stands for the

University of Patras), is offered as a package and is fully

documented so that it can be used for simulations and research

within the ns2 simulation environment. -In　this　paper, we　present a modification　of　the　ns2 code　for　the

RTP/RTCP protocols. The legacy RTP/RTCP code in ns2 has not

yet been validated but　it provides a　fr a mework of　the protocol’s

specification for experimental use. We have modified the code by

adding all the RTP/RTCP protocol’s attributes that are defined in

RFC　3550　and　related　to　QoS　metrics.　We　have　also

implemented　additional　algorithms　and　functions　in　order　to

enhance　our modified　code with　TCP　friendly　bandwidth　share

behavior.　Our　protocol,　named　RTPUP　(“UP”　stands　for　the

University　of　Patras),　is　offered　as　a　package　and　is　fully

documented　so　that　it　can　be used　for　simulations　and　research

within the ns2 simulation environment.