scope:

SCOPE & PURPOSE

According to ITU-T Recommendation Y.1271 [Y.1271], enhanced priority treatment is an essential requirement for the assured capabilities needed for Emergency Telecommunications Service (ETS). Two critical components of enhanced priority treatment are:

♦ Admission control for telecommunications services seeking entry into a network particularly during emergency conditions when network resources may be depleted.

♦ Network restoration for telecommunications services that are in progress when the network experiences an outage resulting in depleted resources.

These components in a Next Generation Network (NGN) can be enabled by:

1. Development of admission control and restoration priority levels based on the criticality of services seeking entry in NGNs and service restoration.

2. Development of necessary extensions in signaling protocols that can indicate the desired service priority levels at NGN interfaces.

3. Development of admission control and restoration mechanisms that can recognize the signaled priority levels and undertake necessary action.

The scope of this document is limited to formalizing priority classification levels for admission control and service restoration (step 1). The purpose is to initiate an examination of existing signaling protocol extensions to determine their adequacy in supporting priority levels and to recommend further action as needed.