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Reasons for the question
The desire to support existing network services and their enhancements
employing AAL type 2 bearer transport technology, will require the specification
of bearer transport technology control protocols which support both fixed and
mobile network applications.
Question
What new recommendations and what enhancements to existing recommendations
are required to support the evolution of AAL type 2 bearer transport control
protocols?
Task objectives
The major focus of this question is to develop AAL type 2 bearer transport
control protocol recommendations to be used to support both fixed and mobile
network based services. The task objectives for the question are:
1) Develop the signalling protocol recommendations for extension of AAL
type 2-bearer control signalling protocols in response to the requirements
from the question responsible for the Signalling requirements for the
support of Bearer Independent Call Control Applications.
2) Participate in the development of any interworking supplements between
AAL type 2 signalling and high layer signalling protocols.
3) Produce the necessary information for Protocol Implementation
Conformance Statements (PICS) with the support of the testing question
(Question 14/11), if required. To assist the test generation the
extensive usage of formal description techniques (e.g. SDL, ASN.1) is
encouraged.
Estimated completion: Ongoing.
The outputs of this question will be recorded as ITU-T recommendations. For
task items 1 and 2, completion dates will be set by requirements from the
question responsible for the Signalling requirements for the support of Bearer
Independent Call Control Applications.
Relationships
The development of these recommendations will require close coordination
activities with:
- Requirements from the question responsible for the Signalling
requirements for the support of Bearer Independent Call Control
Applications.
- High Layer Signalling protocol questions (e.g. BICC).
- User Plane related questions (e.g. 5/13).
- Signalling transport protocol questions, Integrated call and bearer
protocol questions (e.g. DSS 1, DSS 2, ISUP, B-ISUP, H.323).
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