SIST-V ETSI/EG 201 849 V1.1.1:2003

Overview

SIST-V ETSI/EG 201 849 V1.1.1:2003 defines the operational aspects of Bearer Independent Call Control (BICC) protocol when used with the ATM Adaptation Layer (AAL) type 2 signalling protocol, specifically Capability Set 1 (CS1). This standard acts as a supplement to ITU-T Recommendation Q.1901 (TRQ.3010, 1999, modified) and is endorsed by SIST, the Slovenian Institute for Standardization. It provides essential guidance for network engineers and service providers implementing advanced switching and signalling systems in modern telecommunication networks.

The scope of this standard covers the mapping and interoperability requirements for BICC over AAL2 trunking, supporting the evolution of telecommunications infrastructure toward bearer-independent, flexible call control within ATM-based and multiservice networks.

Key Topics

• Bearer Independent Call Control (BICC): BICC enables the decoupling of call control from the underlying bearer technology, supporting voice and multimedia communications in diverse backbone networks.
• ATM Adaptation Layer (AAL) type 2: AAL2 is optimized for carrying voice, video, and other isochronous data flows over Asynchronous Transfer Mode (ATM) networks, providing efficient bandwidth utilization.
• Signalling Protocol Capability Set 1 (CS1): Defines the initial functional capabilities required for signalling within BICC and AAL2 environments, facilitating interoperability.
• Mapping and Interworking: Explains how BICC messages are transported using AAL2 signalling, ensuring compatibility and seamless transition between different network elements and call scenarios.

Applications

The implementation of SIST-V ETSI/EG 201 849 V1.1.1:2003 delivers practical value in several real-world telecommunications scenarios:

• Carrier-Grade Voice Networks: Facilitates the migration from legacy TDM-based switching (such as traditional SS7) to next-generation networks that utilize ATM and IP transport, without losing call control features.
• Multiservice Backbone Networks: Supports the integration of voice, video, and data services across a converged ATM backbone, enhancing network efficiency and quality of service.
• Gateway Interconnections: Provides guidelines for mapping BICC call control across different transport layers, enabling interoperability between legacy PSTN and packet-based networks.
• Future Network Evolution: Lays the groundwork for broader adoption of bearer-independent signalling protocols, critical for evolving telecommunications standards and the gradual transition to all-IP infrastructures.

Related Standards

This standard references and complements a variety of international specifications related to call control and signalling in telecommunication networks:

• ETSI EN 301 848-1: Protocol specification for BICC signalling procedures in ATM/IP backbone networks, focusing on Capability Set 1.
• ETSI EN 300 356-1: Basic services and signalling procedures for ISDN User Part (ISUP) in international interfaces, modified from ITU-T Q.761 to Q.764.
• ETSI EN 300 485: Usage and definition of cause and location indicators in ISDN and Signalling System No.7 protocols.
• ETSI ETS 300 685: Application of cause and location in Digital Subscriber and B-ISDN signalling systems.

Keywords: Bearer Independent Call Control, BICC, ATM Adaptation Layer, AAL2, Capability Set 1, signalling protocol, network interoperability, telecommunications standard, ETSI, SIST, ITU-T Q.1901

By adhering to SIST-V ETSI/EG 201 849 V1.1.1:2003, service providers and equipment manufacturers can ensure seamless, standardized integration of advanced call control protocols in modern ATM-based and multiservice networks, paving the way for robust, scalable, and bearer-independent communications.