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August 14th, 2014

GL Communications ... Insight Into MAPS™ UMTS IuCS Interface Emulator (COMMS)

[SatNews]  ...can support greater data rates for voice and video data transmission to the mobile users.


Universal Mobile Telecommunications System (UMTS) is a 3rd generation mobile technology that can support greater data rates for voice and video data transmission to the mobile users. The underlying transport layer for UMTS can be Asynchronous Transfer Mode (ATM), or Internet Protocol (IP).

GL's LightSpeed1000™ hardware platform with quad optical ports supports simulation of UMTS IuCS over ATM layer on OC-3/STM-1 interface using MAPS™ UMTS IuCS ATM application.

The LightSpeed1000™ hardware platform (PCIe Card and USB Pod) supports wire-speed processing on quad OC-3/12 and STM-1/4 optical ports for functions such as recording, playback, protocol simulation and analysis of Unchannelized ATM, PoS, and Channelized traffic. The LightSpeed1000™ comes with software for overall monitoring, protocol analysis and emulation, and BERT with a price tag that compares very favorably with similar test instruments at three times the price. The hardware can also be easily configured / programmed for delaying of ATM Cells or PPP packets.

MAPS™ UMTS IuCS ATM can emulate the RNC (Radio Network Controller) and the MSC (Mobile Switching Centre) nodes by generating RANAP, ALCAP, and DTAP signaling messages over SSCOP. It includes ready-scripts to simulate all IuCS signalling procedures such as Location Update, Call Control MO (Mobile Originating), Mobile Terminating (MT) and SMS procedures.

The application gives the users the unlimited ability to edit messages and control scenarios (message sequence). "Message sequences" are generated through scripts. "Messages" are created using message templates.

MAPS™ IuCS ATM uses SSCOP server for establishing SSCOP links over which RANAP and ALCAP signaling will be carried for making calls. SSCOP Server is a GL's WCS based server module that provides SSCOP, AAL5 and AAL2 layer services.

 MAPS™ IuCS ATM internally uses AAL2 Traffic Generator for traffic generation on a successfully established call. Various traffic types like Tone, Digits and File playback are supported.

Supported Protocol Standards

Shown below is the protocol stack supported by MAPS™ UMTS IuCS ATM for IuCS signaling.

This test tool can also be used to perform protocol testing as per the following specifications –

Call Generation

Call Generation option allows the user to simulate outgoing communications where an outgoing call is initiated by sending call control messages using proper scripts and profiles. The profile allows necessary parameters of call control messages to be changed during runtime. Messages are exchanged between the MAPS™ and the DUT. MAPS™ application  acts as either the caller or resides at the network terminal acting as callee.

In IuCS interface, MAPS™ acts as either RNC to test MSC (DUT) or MSC to test RNC (DUT) and simulates the MO and MT call control procedures.

MAPS™ IuCS ATM can be configured to handle auto or user-defined traffic over the established call. Various traffic types supported over ATM such as send /record voice files, transmit /detect DTMF /MF digits, and send /detect single /dual tones.

Shown below is a typical MO call flow and screenshot generated by MAPS™ IuCS ATM.

You can find the remainder of this information here.