--- 1/draft-ietf-avtext-multicast-acq-rtcp-xr-02.txt 2011-04-11 17:16:20.000000000 +0200 +++ 2/draft-ietf-avtext-multicast-acq-rtcp-xr-03.txt 2011-04-11 17:16:20.000000000 +0200 @@ -1,19 +1,19 @@ AVT A. Begen Internet-Draft E. Friedrich Intended status: Standards Track Cisco -Expires: October 8, 2011 April 6, 2011 +Expires: October 13, 2011 April 11, 2011 Multicast Acquisition Report Block Type for RTP Control Protocol (RTCP) Extended Reports (XRs) - draft-ietf-avtext-multicast-acq-rtcp-xr-02 + draft-ietf-avtext-multicast-acq-rtcp-xr-03 Abstract In most RTP-based multicast applications, the RTP source sends inter- related data. Due to this interdependency, randomly joining RTP receivers usually cannot start consuming the multicast data right after they join the session. Thus, they often experience a random acquisition delay. An RTP receiver can use one ore more different approaches to achieve rapid acquisition. Yet, due to various factors, performance of the rapid acquisition methods usually varies. @@ -36,21 +36,21 @@ Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." - This Internet-Draft will expire on October 8, 2011. + This Internet-Draft will expire on October 13, 2011. Copyright Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect @@ -473,20 +473,23 @@ Figure 3: Structure of a private extension 5. Session Description Protocol Signaling A new unilateral parameter is defined for the MA report block to be used with the Session Description Protocol (SDP) [RFC4566] using the Augmented Backus-Naur Form (ABNF) [RFC5234]. It has the following syntax within the 'rtcp-xr' attribute [RFC3611]: + xr-format = + xr-format /= multicast-acq-ext + multicast-acq-ext = "multicast-acq" Figure 4 Refer to Section 5.1 of [RFC3611] for a detailed description and the full syntax of the "rtcp-xr" attribute. The "multicast-acq-ext" parameter is compatible with the definition of "format-ext" in the "rtcp-xr" attribute. 6. Security Considerations @@ -529,22 +532,24 @@ in this document: Ali Begen abegen@cisco.com Note to the RFC Editor: In the following, please replace "XXXX" with the number of this document prior to publication as an RFC. 7.1. RTCP XR Block Type - Type value 11 has been pre-registered with IANA for the "Multicast - Acquisition Report Block" in the RTCP XR Block Type Registry. + Note to IANA: Type value 11 has been pre-registered with IANA for + the "Multicast Acquisition Report Block" in the RTCP XR Block Type + Registry. Please replace the existing reference with the RFC number + of this document. 7.2. RTCP XR SDP Parameter This document registers the SDP [RFC4566] parameter 'multicast-acq' for the 'rtcp-xr' attribute in the RTCP XR SDP Parameters Registry. 7.3. Multicast Acquisition Method Registry This document creates a new IANA registry for the MA methods. The registry is called the Multicast Acquisition Method Registry. This