Trillium | Stream Control Transmission Protocol (SCTP)
Description
Stream Control Transmission Protocol (SCTP), defined by the Signal Transport (SIGTRAN) working group of the Internet Engineering Task Force (IETF), is a transport level datagram transfer protocol that operates on top of an unreliable datagram service such as Internet Protocol (IP). SCTP is the transport protocol specified by next generation network architectures and is used by SIP, Diameter, GCP (H.248/MEGACO/MGCP), and SIGTRAN User Adaptation (UA) protocol layers. It provides secure and reliable transport, which is a must to fulfill the promise of next generation network services like multimedia messaging.
SCTP works on the basic concepts of associations and streams. An SCTP association is similar to a TCP connection except that it can support multiple IP addresses at either or both ends. An SCTP association is comprised of multiple logical streams, ensuring the sequenced delivery of user datagrams within a single stream. A datagram lost in one stream does not block datagrams in other streams.
SCTP sublayers
Although SCTP is designed to carry PSTN signaling information over the IP network, its generic design can be utilized to provide a reliable transport delivery mechanism for other multimedia and wireless frameworks such as SIP, Diameter, GCP, 4G wireless and so on.
Trillium SCTP protocol software enables telecom equipment manufacturers of Soft Switches, Call State Control Functions (CSCF), IP edge devices, IMS Application Servers, Fixed Mobile Convergence Gateways or other products to:
- Accelerate time to market
- Reduce development costs
- Reduce project risk of internally developed SCTP applications
Product deliverables consist of C protocol source code software, documentation, training, and warranty and technical support.
SCTP services include:
- Acknowledged error-free non-duplicated transfer of user data
- Segmentation of user datagram to conform to the path MTU size
- Sequenced delivery of user datagrams within a stream
- Optional bundling of multiple user datagrams into one SCTP datagram to improve bandwidth utilization
- Support for multiple transport addresses at either or both ends of an association to enhance reliability
Features + Benefits
- Seamless integration with Trillium protocol software SCTP users:
- Delivers datagrams reliably
- Provides multiple streams to remove head-of-line blocking
- Delivers sequenced datagrams in a stream; a datagram lost in one stream does not block datagrams in other streams.
- Delivers out-of-order datagrams
- Segments large user datagrams to conform to the current path MTU size
- Bundles multiple, small user datagrams in a SCTP datagram to improve bandwidth use
- Supports multi-homing
- Provides a service user, controlled heartbeat mechanism to monitor whether the endpoint is reachable
- Provides endpoint failure notifications
- Provides destination transport address failure notifications of a multi-home destination
- Provides destination address failover mechanism
- Provides interface to the service user to retrieve unsent/undelivered/ unacknowledged datagrams for abnormal association termination
- Supports DNS interface to resolve hostname parameter
- Supports both Adler-32 and CRC-32 checksum algorithm at runtime (RFC 3309)
- Supports path probing procedure
- Provides a management interface for configuration and control operations, and status and statistics retrieval; it also provides protocol state and alarm information at the management interface
- Provides extensive run-time error checking support
- Provides extensive debugging support to ease system integration and testing
- Provides support for function call traces and tracing of incoming and outgoing PDUs; the trace information is provided at the management interface, which can be used to support remote logging and analysis operation
- Supports IPv4 and IPv6
- Supported user defined IP TOS parameters
- Conforms to Trillium Advanced Portability Architecture (TAPA)
- Benefits of licensing Trillium protocol source code software from Continuous Computing
Interworking
Trillium SCTP protocol source code software interworks with the following Trillium portable software products:
- Trillium SIP (Session Initiation Protocol)
- Trillium Diameter
- Trillium GCP (Gateway Control Protocol)
- Trillium M3UA (MTP3 User Adaptation Layer)
- Trillium IUA (ISDN Q.921 User Adaptation Layer)
- Trillium V5UA (V5 User Adaptation Layer)
- Trillium DUA (DPNSS/DASS-Layer 2 User Adaptation Layer)
- Trillium SUA (SCCP User Adaptation Layer)
- Trillium M2UA (MTP2 User Adaptation Layer)
- Trillium M2PA (MTP2 User Peer-to-Peer Adaptation Layer)
Professional Services
Continuous Computing also offers Trillium Professional Services to integrate Trillium software into customers' products.
Conformance
Trillium SCTP software conforms to the following standards:- Trillium Advanced Portability Architecture (TAPA)
- Stream Control Transmission Protocol, IETF RFC 2960
- SCTP Checksum, IETF RFC 3309
- SCTP Specification Errata and Issues, IETF RFC 4460
- ETSI TS 102 369 v1.1.1 SCTP
- ETSI TS 102 144 v1.1.1 SCTP Test Specification
