Protocol Definition. We assume that every node is fielded with the ability to generate cryptographic keys (cf., [22]). Node i initially Observe that, on average, node i stores E[fi] = f (n)/βn keys initially and there are a total of f (n)/β keys in the network. Node i is initialized to the susceptible state with respect to the doping keys generated at all other nodes. Returning to the protocol described in Section III-B, dynamic operation can be achieved by inserting a key exchange procedure between steps G-1 and G-2. Specifically, for every pair of destination nodes (di, dj) ∈ D × D such that i < j:
Protocol Definition. “RTCP XR – Report Block for IPTV Metrics (draft-venna-avt-rtcpxr-iptv-02)” defines a new report block for the Extended Report (XR) packet type of the RTP Control Protocol (RTCP) defined in RFC 3550 that allows IPTV clients to report to a server on various aspects of the stream that is being delivered to them. The new reporting blocks defined in this internet draft report metrics from various encapsulations and views of the media stream - RTP, MPEG-2 TS, Programs, Elementary Streams. The IPTV Metrics Report Block defined in “RTCP XR – Report Block for IPTV Metrics (draft-venna-avt-rtcpxr-iptv-02)” is composed of a main report block and two sub-blocks: the Main Block, the Program Sub-block, the Elementary Stream Sub-block. The Main Block is composed of performance metrics related to RTP traffic, the Program Sub-block is composed of metrics related to programs and channel change and the Elementary Stream Sub-block is composed of metrics related to elementary streams, which are usually the output of an audio or video encoder. Packets in the Program Sub-block and the Elementary Stream Sub-block refer to TS (Transport Stream) packets. Packets in the Main Block refer to RTP packets.
