In this paper, we introduce a benchmark suite on RTP/RTCP processing. The suite consists of three benchmarks, namely RTP Sender, RTP Receiver and RTCP Processing. For each benchmark, three aspects are specified: functions, measurements and environments. After implementing the benchmarks, we perform profiling in order to determine the time-critical functions and investigate the architectural cha...

The Real-time Transport Control Protocol (RTCP) is a crucial mechanism used, amongst other things, for synchronisation and feedback control in multimedia sessions. However as groups grow to large numbers, it faces two serious challenges: the growing deployment of unidirectional and asymmetric broadcast architectures, such as Source-Specific Multicast and satellite networks, eliminate the shared...

The Session Description Protocol (SDP) has an attribute that allows RTP applications to specify an address and a port associated with the RTP Control Protocol (RTCP) traffic. In RTP-based source-specific multicast (SSM) sessions, the same attribute is used to designate the address and the RTCP port of the Feedback Target in the SDP description. However, the RTCP port associated with the SSM ses...

When an application connects with a remote peer using TCP, its network stack encapsulates the state of that connection. As a consequence, even if the application is capable of recovering its own state after failure (for example, by restarting at a backup location), the peer may experience a disruption of connectivity due to the loss of the network stack’s state. We present RTCP, a new tool that...

This memo discusses benefits and issues that arise when allowing RTCP packets to be transmitted with reduced size such that mandatory report types according to the rules outlined in RFC3550 are removed. Based on that analysis this memo proposes changes to the rules to allow feedback messages to be sent as reduced size RTCP packets when using the RTP AVPF profile (RFC 4585) under certain conditi...

Our work is concerned with the provision of resource-managed multimedia communications in an Internet environment. In this paper we outline an architecture and an implementation of a real-time continuous media adaptive application that includes the Real-time Transport Protocol (RTP) and its associated control protocol (RTCP). The application makes use of the RTCP feedback reports for Quality of...

In this paper, we address some of the problems concerning RTCP scalability in large multicast groups. The problems are summarised as the increased storage state maintained by every member about every other member in the group, the feedback delay, and the bandwidth usage problem especially for receivers that obtain incoming RTCP reports through low bandwidth links. We designed a scheme to tackle...

Support for non-compound RTCP, opportunities and consequences draft-ietf-avt-rtcp-non-compound-04 Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Draft...

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 framework 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 alg...

Support for non-compound RTCP, opportunities and consequences draft-ietf-avt-rtcp-non-compound Status of this Memo By submitting this Internet-Draft, each author represents that any applicable patent or other IPR claims of which he or she is aware have been or will be disclosed, and any of which he or she becomes aware will be disclosed, in accordance with Section 6 of BCP 79. Internet-Drafts a...