ITU - Telecommunication Standardization
Sector
Geneva, 19 February 2002
QUESTIONS: Q.14/15 SOURCE: Rapporteur TITLE: Communication
Statement to IETF CCAMP Working Group on signalling protocol work in Q.14/15 _____________ COMMUNICATION STATEMENT TO: IETF
CCAMP Working Group CC: Optical
Internetworking Forum (OIF) APPROVAL: Agreed to at 11 – 15 February 2002
Darmstadt Rapporteur Meeting FOR: Action DEADLINE: None CONTACT: Hing-Kam
Lam Tel: +1-732-949-8338 101 Crawfords Corner Road Fax: +1-732-949-5055 Holmdel, NJ 07733, USA Email: hklam@lucent.com |
Q.14/15 would like to inform the IETF
CCAMP Working Group that Q.14/15 is in the midst of initiating work efforts in
defining the protocol specific work for the ASON signalling protocols. Q.14/15
has initiated work on:
-
G.7713.1, which is based on the Q.2931
(ATMF UNI and PNNI) signalling protocol
-
G.7713.2, which is based on the GMPLS
RSVP-TE signalling protocol
-
G.7713.3, which is based on the GMPLS
CR-LDP signalling protocol
In the upcoming Q.14/15 meetings, these
specific protocols will each be analysed against the set of requirements from
G.807/Y.1302, G.8080/Y.1304 and G.7713/Y.1704. Q.14/15 will be evaluating any
possible modifications that may be needed to each of the specific protocols in
order to meet the requirements.
We have identified some requirements that
do not appear to be met by the existing GMPLS protocols, for examples
1. Call & Connection separation, e.g., a call
provides the service relationship, which may support connection operations as
part of a call.
2. Additional error codes/values, for example,
for connection rejection (invalid connection ID).
3. Restart mechanisms: Depending on the introduction by
the ITU of additional control plane resiliency requirements, enhancements of
the protocol (RSVP-TE, CR-LDP) "graceful restart" mechanisms may be
required.
4. Protocol enhancements in CR-LDP for support of crankback
capability from intermediate nodes.
We wish that as we continue our review of
these protocols you will be able to provide us with recommendations on how to
close these and future issues.
Four documents are available at the ITU-T
public ftp site for your information. These include the three draft
Recommendations as described above, plus the template of requirements to be
used in evaluating the specific protocols. Q.14/15 looks forward to your input
to help progress this work in Q.14/15.
The four documents may be obtained from
ftp://sg15opticalt:otxchange@ftp.itu.int/tsg15opticaltransport/COMMUNICATIONS/index.html.
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