DVB-H Reference Architecture and Interface

DVB-H - Reference Architecture and Interface Overview

1). DVB-IPDC Reference Architecture:

http://docs.google.com/View?id=ddh56dhg_205g5bmqbg7

2). Reference Points / Interfaces:

Ref Point	End Points	Usage
CBMS-1	From Broadcast network To Terminal	Broadcast network-specific singnalling, PSI/SI signalling in DVB-H.
CBMS-2	From Service Application To Terminal	Content Flow, including: • A/V streams. • Auxiliary data. • Files delivered by a carousel mechanism (clips, software, etc.).
CBMS-3	From Service Management To Terminal	Electronic Service Guide (metadata, point-to-multipoint delivery).
CBMS-4	Between Service Management and Terminal (only for the interactive network)	• Electronic Service Guide (metadata, point-to-point delivery). • Access Control to service applications. • This reference point exists only if the IPDC terminal includes an endpoint for the interactive network and if service management supports this reference point.
CBMS-5	Between Service Application and Terminal (only for the interactive network)	• Point-to-point transport services (SMS/MMS, IP connectivity). • This reference point exists only if the IPDC terminal includes an endpoint for the interactive network and if service application supports this reference point. • Service applications may require this reference point.

Ref Point	End Points	Usage
CBMS-6	From Service Management To Broadcast network	Configuration of the DVB-H transport (number of services, allocated bandwidth, etc.).
CBMS-7	Between Service Application and Service Management	• Service Application Declaration. • Service Application Description, including content description/metadata.

Ref Point	End Points	Usage
X-1	Between Content Creation and Service Application	Provision of content to Service Application, including: • Content essence. • Content description/metadata. • Content control policy,
X-2	Between Interactive Network and Terminal	Interactive network specific interactions (authentication, mobility management, specific services such as voice, etc.).
X-3	Between Service Management and Interactive Network	This reference point may be used to access specific functions available in the interactive network, such as subscriber management or billing functions.

§ CBMS = Convergence of Broadcast and Mobile Services

3). Functional Entity OV:

3.1). Content Creation

§ This is the primary source of content for distribution over IP Datacast. It may provide support for delivery paradigms, such as streaming.

§ Provides base material for content descriptions.

3.2). Service Application

§ Aggregates content from multiple sources and their related metadata in order to provide a particular service application.

§ Provides the head-end application logic.

§ Responsible to provide content encoded in the format understood by the terminal either via streaming or file carousel delivery.

§ Generates service description metadata to be used in the Electronic Service Guide (to be provided at CBMS-7).

§ Interaction end-point for terminals to interact with service application.

§ Service Protection provision.

§ A Service Application entity may exist for each application that is provided in IP Datacast.

3.3). Service Management

§ Consists of four sub-entities, which may be instantiated independently:

1. Service configuration and resource allocation:

§ Registration of service applications that contend for bandwidth of the broadcast bearer (i.e. one DVB-H IP platform in one DVB transport stream).

§ Assignment of services to location (wrt. Broadcast network topology), to bandwidth and schedules services over time.

§ There is one instance of this sub-entity associated with a broadcast bandwidth contention domain.

2. Service Guide Provisioning application:

§ Aggregation of ESG (metadata information) pieces from the service applications.

§ There may be multiple instances of this sub-entity.

3. Security / Service protection provision:

§ Management of user access to service applications.

4. Location services:

§ The service management entity may provide location services to service application(s) in a manner that is independent of the way they are actually obtained (such as interaction bearer network functionality or GPS).

3.4). Broadcast Network

§ Multiplexing of service applications at IP level.

§ Assignment of IP flows on DVB-H time slices (IP Encapsulation).

§ Transmission over DVB-H.

§ Security/Service protection provisioning

3.5). Interactive Network

§ Provision for terminal to interact with service management and/or service application.

§ This entity exists only if the IPDC-DVB-H terminal includes an endpoint for it and if service management and/or service application support the relevant reference points. Service applications may require communication over the interactive network.

§ May provide additional functionalities to Service Application or Service Management, such as Location Services (may require additional reference point)

§ Security/Service protection provisioning

3.6). Terminal

§ The user device.

§ Point of acquisition and consumption for content.

§ Client of network and service resources.