scope:

The present technical specifications extend and complement the existing BSM QoS functional architecture to enable transport of MPLS signalling and data flows over a BSM network in a way such that MPLS networks connected by different STs can communicate as if they were connected by standard terrestrial LSRs (label switching routers).

The present document forms part 1 of this multi-part deliverable. It defines the main architectural concepts, including the network architecture and protocol stacks, and outlines the key QoS, traffic engineering and resiliency provisions. Several architecture variants are defined and their main characteristics are analysed, also taking into account three different BSM network types.

An Annex sketches a set of use cases that illustrate different application and configuration scenarios of the present specifications.

In a separate document, TS 102 856-2 [11], the detailed procedures in BSM network entities and related signalling issues are addressed. A particular focus is placed on the fully integrated MPLS/BSM architecture as defined in the present document.

The setup of multicast MPLS paths is considered out of scope of this multi-part deliverable.